CN113309003A - Cable strand adjusting device and method for erecting main cable by suspension bridge aerial spinning method - Google Patents
Cable strand adjusting device and method for erecting main cable by suspension bridge aerial spinning method Download PDFInfo
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- CN113309003A CN113309003A CN202110670736.XA CN202110670736A CN113309003A CN 113309003 A CN113309003 A CN 113309003A CN 202110670736 A CN202110670736 A CN 202110670736A CN 113309003 A CN113309003 A CN 113309003A
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Abstract
本发明属于悬索桥主缆索股调整施工技术领域，具体涉及一种悬索桥空中纺线法架设主缆的索股调整装置及方法。本发明包括边跨索股调整机构和中跨索股调整机构，边跨索股调整机构包括反力梁单元、第一连接件单元、反力座单元、穿心千斤顶、第二连接件单元和钢束；中跨索股调整机构包括反力耳板单元、反力座单元、穿心千斤顶、第二连接件单元和钢束。本发明采用模块化设计且之间销轴连接，周转重复使用率高。本发明通过穿心千斤顶多行程张拉钢束带动索股移动，实现其标高调整。索股调整张力大，调整范围大且能精确控制索股位移量，调整精度高，高效解决了大吨位索股调整的问题。本发明利用散索鞍门架横梁及主索鞍鞍槽壁作为锚固受力点，安全可靠。
The invention belongs to the technical field of adjustment and construction of main cable strands of suspension bridges, and in particular relates to a cable strand adjustment device and method for erecting main cables of suspension bridges by aerial spinning method. The invention includes a side span cable-strand adjustment mechanism and a middle-span cable-strand adjustment mechanism. The side-span cable-strand adjustment mechanism includes a reaction force beam unit, a first connector unit, a reaction force seat unit, a center-span jack, a second connector unit and Steel bundle; the mid-span cable strand adjustment mechanism includes a reaction force lug unit, a reaction force seat unit, a through-core jack, a second connecting piece unit and a steel bundle. The invention adopts a modular design and is connected by pins, and the turnover rate is high. The invention realizes its elevation adjustment by driving the cable strands to move through the multi-stroke tensioning steel bundle of the through-core jack. The adjustment tension of the cable strand is large, the adjustment range is large, and the displacement of the cable strand can be precisely controlled, the adjustment precision is high, and the problem of the adjustment of the large tonnage cable strand is efficiently solved. The invention utilizes the cross beam of the gantry frame of the scattered cable saddle and the wall of the saddle groove of the main cable saddle as the anchoring force point, which is safe and reliable.
Description
Technical Field
The invention belongs to the technical field of suspension bridge main cable strand adjustment construction, and particularly relates to a cable strand adjusting device and method for erecting a main cable by a suspension bridge aerial spinning method.
Background
Two construction processes are provided for erecting a main cable of a suspension bridge, one is a prefabricated parallel strand method (PPWS), namely, steel wires are prefabricated into parallel strands in a factory in advance, and then the parallel strands are pulled and erected on a catwalk by using a traction system; the other is the Air Spinning (AS) method, i.e. the main cable strand is formed by drawing steel wires back and forth at the bridge site using spinning wheels. An air spinning method (AS method) is still widely used abroad at present AS one of main cable construction methods, and domestic suspension bridge main cables are designed and constructed by adopting a prefabricated parallel strand method (PPWS method).
With the continuous development of economic construction in China, the foundation engineering construction such as bridge construction and the like has unprecedented development opportunities, and particularly the demand of constructing an ultra-large span suspension bridge across rivers, seas and canyons is more and more prominent. The AS method has obvious advantages in terms of solving strand transportation, saving cable manufacturing cost, reducing catwalk material consumption and reducing catwalk erection construction difficulty in the construction of a suspension bridge with an oversized span (more than 2000 m) compared with the PPWS, so that the method is especially key to master and apply the AS method technology. Compared with the PPWS method, the AS method has less cable strands, but the number of the steel wires forming each cable strand is large, generally comprising 300-500 steel wires, and is more than 3 times of the number of the steel wires of a single cable strand in the PPWS method. Because the number of steel wires of each strand of the AS method is large, the strand is manufactured at the design position, the adjustment tension is large, the adjustment difficulty of the strand is large, and the previous method for adjusting the strand by the PPWS method is not applicable any more.
Disclosure of Invention
The invention provides a strand adjusting device and method for erecting a main cable by an air spinning method of a suspension bridge, aiming at solving the problem of strand adjustment of the main cable erected by the AS method of the suspension bridge.
In order to achieve the purpose, the invention adopts the technical scheme that:
a cable strand adjusting device for erecting a main cable by a suspension bridge aerial spinning method at least comprises a cable saddle buttress portal frame, a cable saddle buttress, a main cable saddle and a cable strand to be adjusted; the cable holders are arranged on the side span cable strand to be adjusted and the mid-span cable strand to be adjusted on the cable strand to be adjusted; the cable saddle support pier portal is fixed on the cable saddle support pier and provided with a cross beam, and a cable saddle is fixed between the cable saddle support pier portal and the cable saddle support pier; the main cable saddle is provided with a saddle groove, and further comprises a side span cable strand adjusting mechanism and a mid span cable strand adjusting mechanism; one end of the side span cable strand adjusting mechanism is fixed on a cross beam of the dispersed cable saddle buttress portal frame, and the other end of the side span cable strand adjusting mechanism is fixed on a cable holder on a side span cable strand to be adjusted; one end of the midspan strand adjusting mechanism is fixed on the saddle groove of the main cable saddle, and the other end of the midspan strand adjusting mechanism is fixed on a cable holder on a midspan strand to be adjusted in the main span direction.
The side span cable strand adjusting mechanism comprises
The reaction beam unit is fixed on a cross beam of the cable saddle buttress gantry through a fixing piece;
the first connecting piece units are at least provided with two groups, and two of each group are arranged on one side of the counter-force beam unit in a pairwise parallel and symmetrical manner;
the reaction seat unit is connected to the reaction beam unit through a first connecting piece unit;
the penetrating jack is used for adjusting the sag of the side span cable strand to be adjusted and is supported on the counter-force seat unit, and a second anchorage device is arranged on the top surface of the penetrating jack;
the second connecting piece units at least comprise two groups, the two groups of second connecting piece units are symmetrically arranged on two sides of the side span cable strand to be adjusted of the far discrete cable saddle, and one end of each second connecting piece unit is connected with the cable holder fixed on the side span cable strand to be adjusted;
the steel bundle at least comprises two strands, the two strands of steel bundles are symmetrically arranged on two sides of the side span to-be-adjusted cable strand, the fixed end of each strand of steel bundle is connected with the other end of the second connecting piece unit through the third anchor and the third clamping piece, and the tensioning end of each strand of steel bundle penetrates through the counter-force seat unit and the piercing jack and is fixed through the second anchor and the second clamping piece.
The counter-force beam unit at least comprises two anchoring section steels, a plurality of second stiffening plates, two first anchoring ear plates and a plurality of third stiffening plates; the two anchoring section steels are arranged in parallel, and a plurality of second stiffening plates are arranged between the two anchoring section steels and perpendicular to the two anchoring section steels; the two anchoring section steels and the second stiffening plates form a counter-force beam; two first anchoring ear plates are symmetrically arranged on a flange plate on one side of the counterforce beam; the reaction beam is connected with the first connecting piece unit through the first anchoring lug plate; a plurality of third stiffening plates are respectively arranged on two sides of the first anchoring ear plate; the reaction beam is fixed on the beam of the cable saddle buttress gantry through a fixing part.
The fixing piece comprises a flange connecting plate, an upper web connecting plate and a bottom web connecting plate; the upper web connecting plate and the bottom web connecting plate are respectively detachably connected to a web on the reaction beam and a web on a cross beam of the cable saddle buttress gantry; one side of the flange connecting plate is fixed with the flange plate on the reaction beam, and the other side of the flange connecting plate is fixed with the flange plate on the cable saddle portal beam.
The first connecting piece unit at least comprises a glasses plate and four second reinforcing plates; two sides of the pin hole at the two arc ends of the glasses plate are respectively provided with a second reinforcing plate; the first connecting piece units are at least four, the two first connecting piece units are arranged in a group and in a pairwise parallel mode, one ends of the two groups of first connecting piece units are fixedly connected with two ends of the counter-force seat unit respectively, and the other ends of the two groups of first connecting piece units are fixedly connected with the counter-force beam unit respectively.
The mid-span strand adjusting mechanism comprises
The reaction lug plate units are at least arranged in two groups, and the two groups of reaction lug plate units are respectively arranged on two outer side wall plates of the saddle groove of the main cable saddle;
the reaction seat unit is fixed on the tower top main cable saddle through the reaction lug plate unit;
the center-penetrating jack is supported on the counter-force seat unit and is used for adjusting the sag of the mid-span strand to be adjusted;
the second connecting piece units at least comprise two groups, the two groups of second connecting piece units are symmetrically arranged at two sides of the cable strand to be adjusted in the midspan of the main cable saddle, and one end of each second connecting piece unit is connected with a cable holder fixed on the cable strand to be adjusted in the midspan;
the steel bundle at least comprises two steel bundles, the two steel bundles are symmetrically arranged on two sides of the cable strand to be adjusted in the midspan, the fixed end of each steel bundle is fixedly connected with the other end of the second connecting piece unit through a third anchor device and a third clamping piece, and the tensioning end of each steel bundle penetrates through the first anchor device, the first clamping piece, the counter-force seat unit and the center penetrating jack and then is fixed through the second anchor device and the second clamping piece.
The counter-force ear plate unit at least comprises a second anchoring ear plate, a fourth reinforcing plate and a fifth reinforcing plate; the second anchoring ear plate is an integrated structure consisting of a triangular plate and a rectangular plate which are arranged up and down; the long edge of the triangular plate is connected with the long edge of the rectangular plate; the vertex angle of the triangular plate adopts circular arc transition and is provided with a pin hole, and the two sides of the pin hole are respectively provided with a fourth reinforcing plate; two pin holes are symmetrically formed in the rectangular plate, and fifth reinforcing plates are arranged on two sides of the two pin holes respectively; the rectangular plate is fixedly connected with the side wall of the saddle groove of the main cable saddle, and the triangular plate is fixedly connected with the counter-force seat unit.
The second connecting piece unit comprises a sixth reinforcing plate, a connecting ear plate, an anchoring bottom plate, a fourth stiffening plate and a fifth stiffening plate; the two connecting lug plates are vertically arranged in parallel, each connecting lug plate is a rectangular plate with one circular arc end, a pin hole is formed in the circular arc end, and seventh reinforcing plates are respectively arranged on the inner sides of the pin holes of the two connecting lug plates; the other ends of the two connecting ear plates are vertically fixed on the anchoring bottom plate, two fifth stiffening plates are horizontally arranged on the inner sides of the two connecting ear plates at intervals, and two sixth stiffening plates are wrapped outside the fifth stiffening plates; two parallel fourth stiffening plates are arranged on the inner sides of the two sixth stiffening plates at intervals vertical to the sixth stiffening plates; the two connecting plate ear plates, the two fifth stiffening plates and the anchoring plate form a box-shaped structure together.
The counterforce seat unit at least consists of a supporting beam and a support frame of the piercing jack; the supporting beam consists of two supporting beam web plates, a supporting beam top plate, a supporting beam bottom plate, two connecting end plates and a plurality of supporting beam stiffening plates, wherein the two supporting beam web plates are vertically arranged in parallel; the middle parts of the supporting beam top plate and the supporting beam bottom plate are provided with strip-shaped holes with the same size; the top of each connecting end plate is in an arc shape, pin holes are formed in the ends of the arc shapes, a first reinforcing plate is arranged on each of two sides of each pin hole, and a first reinforcing plate is connected between each two connecting end plates and the top plate of the supporting beam; the punching jack support frame is formed by the crossed arrangement of two first vertical support plates, two second vertical support plates, two third vertical support plates, two fourth vertical support plates and a plurality of transverse support plates which are arranged in parallel to form a sheet frame structure; the two first vertical supporting plates and the two second vertical supporting plates are vertically fixed on the top plate of the supporting beam at intervals, and the second vertical supporting plates are arranged in the two first vertical supporting plates; the transverse supporting plate is fixedly connected with the first vertical supporting plate, the second vertical supporting plate, the third vertical supporting plate and the fourth vertical supporting plate in a cross mode to form a frame structure; the middle part of the transverse supporting plate is arranged to be in an arc shape; a jack supporting seat is fixed on one side of the supporting beam connected with the center-penetrating jack supporting frame; the jack support seat comprises a support seat bottom plate, a support seat wall plate and a support seat top plate; the supporting seat bottom plate, the supporting seat wall plate and the supporting seat top plate are fixedly connected in sequence from bottom to top to form a cylindrical supporting body; hand holes are symmetrically formed in two opposite supporting seat wall plates, and bolt holes are formed in four corners of a supporting seat bottom plate; a first anchor is fixedly connected to the top plate of the support beam, and a first clamping piece is connected to the first anchor; the jack supporting seat is fixedly connected with the supporting beam top plate through the supporting seat bottom plate.
A construction adjusting method of a strand adjusting device for erecting a main cable by a suspension bridge aerial spinning method comprises the following steps,
the method comprises the following steps: reaction beam unit is arranged on cross beam of dispersed cable saddle buttress portal frame
Two ends of the anchoring section steel are respectively connected and fixed with flanges and web plates corresponding to the cross beam of the cable saddle buttress portal through flange connecting plates, upper web connecting plates and bottom web connecting plates;
step two: the method comprises the following steps that first connecting piece units are arranged in parallel in pairs to form a group, one end of each group of first connecting piece units is connected with a connecting lug plate of a component of a counterforce seat unit, and the other end of each group of first connecting piece units is connected with a first anchoring lug plate of a component of a counterforce beam unit on a gantry beam of a cable saddle bracket;
step three: fixing a jack support seat on the counter-force seat unit;
step four: two groups of second connecting piece units are symmetrically arranged on two sides of the side span cable strand to be adjusted and are respectively fixed with the cable holders on the side span cable strand to be adjusted far away from the cable scattering saddle;
step five: installing two steel bundles; each strand of steel bundle is symmetrically arranged on two sides of the cable strand to be adjusted on the side span, one end of each strand of steel bundle is connected with the second connecting piece unit through a third anchorage device and a third clamping piece in an anchoring mode, and the other end of each strand of steel bundle sequentially penetrates through the first anchorage device and the core penetrating jack to be connected with the second anchorage device;
step six: reaction lug plate units are respectively arranged on the two outermost side walls of the saddle groove of the main cable saddle; a second anchoring ear plate of the single reaction ear plate unit is fixed on the outermost side wall of the saddle groove of the main cable saddle, and the arc end on the second anchoring ear plate is fixedly connected with a connecting end plate on the reaction seat unit;
step seven: according to the construction method of the third step, the fourth step and the fifth step, the installation of the center-penetrating jack of the midspan strand adjusting mechanism at the position of the main cable saddle on the counter-force seat unit, the installation of the second connecting assembly unit and the midspan strand holder to be adjusted in the main span direction far away from the main cable saddle, and the installation of the two ends of the tension steel bundle and the first anchorage, the center-penetrating jack, the second anchorage, the second clamping piece, the third anchorage and the third clamping piece are respectively completed;
step eight: the main cable strand elevation adjustment sequence is first midspan and then side span; the adjustment of the mid-span enters the step nine, and the adjustment of the side-span enters the step ten;
step nine: fixing the end of the steel strand penetrating out of the through jack on the end surface of the oil cylinder of the through jack by using a second clamping piece and a second anchor, and jacking the second anchor by using the through jack to realize the tensioning of the steel strand, transmitting the tensioning force to a cable holder fastened with a cable strand to be adjusted and driving the cable strand to move; for the strand with large adjustment amount, the specific operation is as follows: after the center-penetrating jack jacks the second anchorage device for one stroke, the first clamping piece is installed in the first anchorage device which penetrates through the steel bundle, the center-penetrating jack returns oil, the steel bundle is anchored on a supporting beam top plate of the counter-force seat unit through the first anchorage device, the second anchorage device moves to the end surface of an oil cylinder of the center-penetrating jack, the second clamping piece fastens the steel bundle in the second anchorage device again, and the center-penetrating jack jacks the second anchorage device again for tensioning the steel bundle to realize movement of the strand; repeating the operation until the elevation of the adjusted cable strand reaches the design requirement, driving a wedge-shaped wood block in the saddle groove where the adjusted cable strand is located, fastening the cable strand in the saddle groove of the main cable saddle, and completing the elevation adjustment of the mid-span cable strand;
step ten: and adjusting the adjusted cable strand to the designed elevation position at the side span by using a side span cable strand adjusting mechanism arranged on a beam of the dispersed cable saddle gantry according to the operation steps of the step nine, and driving a wedge-shaped wood block into a saddle groove of the dispersed cable saddle to fasten the adjusted cable strand on the dispersed cable saddle.
Has the advantages that:
1) according to the invention, the components are connected by the modular unit design of the reaction beam unit, the reaction seat unit, the first connecting piece unit, the second connecting piece unit and the reaction lug plate unit by the pin shaft, so that the assembly and disassembly are convenient, and the turnover and reuse rate is high.
2) The invention realizes the elevation adjustment by driving the cable strand to move through the multi-stroke tensioning steel bundle of the punching jack. The cable strand adjustment tension is big, and the adjustment range is big and can accurate control cable strand displacement volume, and the adjustment accuracy is high, has solved the problem of large-tonnage cable strand adjustment high-efficiently, and the practicality is strong.
3) The invention utilizes the dispersed cable saddle portal beam and the main cable saddle groove wall plate as the anchoring stress points of the adjusting device, fully utilizes the existing components and has safe and reliable anchoring stress.
The foregoing is merely an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to be implemented in accordance with the content of the description, the following is a detailed description of preferred embodiments of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an elevational view of the overall arrangement of the side span cable strand adjustment assembly of the present invention;
FIG. 2 is a plan view of the overall arrangement of the edge span strand adjustment assembly of the present invention;
FIG. 3 is an elevational view of the present invention span strand adjustment arrangement;
FIG. 4 is a plan view of a cross-strand adjustment device arrangement of the present invention;
FIG. 5 is a side view of the side span strand adjustment mechanism of the present invention;
FIG. 6 is an elevational view of the structure of the side span cable strand adjustment assembly of the present invention;
FIG. 7 is a plan view of the side span strand adjustment assembly of the present invention;
FIG. 8 is an elevational view of the reaction force seat unit of the present invention;
FIG. 9 is a side view of the reaction force seat unit of the present invention;
FIG. 10 is a plan view of the reaction force seat unit of the present invention;
FIG. 11 is a perspective view of the cross brace of the jack support frame of the present invention;
FIG. 12 is a thumbnail view of a jack support bracket vertical steel plate of the present invention;
FIG. 13 is an elevational view of the jack support of the present invention;
FIG. 14 is a side elevational view of the jack support base of the present invention;
FIG. 15 is a plan view of the jack support base of the present invention;
FIG. 16 is an elevational view of the first connector unit of the present invention;
fig. 17 is a plan view of a first connector unit of the present invention;
FIG. 18 is an elevational view of the reaction force seat unit mounted on the main cable saddle in accordance with the present invention;
FIG. 19 is a plan view of the reaction force seat unit of the present invention installed on the main cable saddle;
FIG. 20 is an elevational view of a second connector unit of the present invention;
fig. 21 is a plan view of a second connector unit in the present invention.
In the figure: 1-a counter-force beam unit; 2-a counter-force seat unit; 3-a first connector unit; 4-a second connector unit; 5-steel bundle; 6-jack support base; 7-a first anchorage; 8-a first clip; 9-a center-penetrating jack; 10-a second anchorage; 11-a second jaw; 12-a third anchor; 13-a third jaw; 14-reaction lug plate unit; 15-a first connecting pin; 16-a second connecting pin; 17-a third connecting pin; 18-a support beam web; 19-supporting the beam top plate; 20-support beam bottom plate; 21-a support beam stiffening plate; 22-connecting end plates; 23-a first stiffener; 24-a first stiffener plate; 25-a transverse support plate; 26-a first vertical support plate; 27-a first card; 28-a first fastening bolt; 29-a second card; 30-a second fastening bolt; 31-a second stiffener; 32-anchoring section steel; 33-a second stiffener; 34-an upper web connection plate; 35-bottom web attachment plate; 36-flange joint plate; 37-a first high-strength bolt; 38-a second high-strength bolt; 39-third stiffening plate; 40-a first anchoring ear plate; 41-a third stiffener; 42-a second vertical support plate; 43-a third vertical support plate; 44-a fourth vertical support plate; 45-fourth connecting pin shaft; 46-a support base plate; 47-a support seat wall panel; 48-supporting seat top plate; 49-a second anchoring ear plate; 50-a fourth stiffener plate; 51-fifth Qiangjiaban; 52-glasses plate; 53-sixth stiffening plate; 54-connecting ear plate; 55-a seventh stiffener; 56-anchoring the bottom plate; 57-a fourth stiffener; 58-the fifth stiffener; 59-fifth connecting pin; 60-a third fastening bolt; 61-a cable saddle buttress gantry; 62-a saddle buttress; 63-main cable saddle; 64-span to-be-adjusted cable strand; 65-mid-span strand to be adjusted; 66-a cable gripper; 67-Cable saddle.
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clear and clear, and to implement them in accordance with the content of the description, the following is a detailed description of preferred embodiments of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-7, the cable strand adjusting device for erecting a main cable by a suspension bridge aerial spinning method at least comprises a saddle-scattering buttress portal 61, saddle-scattering buttresses 62, a main cable saddle 63 and a cable strand to be adjusted; the cable holders 66 are arranged on the side span cable strand to be adjusted 64 and the mid span cable strand to be adjusted 65 on the cable strand to be adjusted; the cable saddle support pier portal 61 is fixed on the cable saddle support pier 62, a beam is arranged on the cable saddle support pier portal 61, and a cable saddle 67 is fixed between the cable saddle support pier portal 61 and the cable saddle support pier 62; the main cable saddle 63 is provided with a saddle groove, and further comprises a side span cable strand adjusting mechanism and a mid span cable strand adjusting mechanism; one end of the side span cable strand adjusting mechanism is fixed on a cross beam of the cable saddle buttress gantry 61, and the other end of the side span cable strand adjusting mechanism is fixed on a cable holder 66 on a side span cable strand 64 to be adjusted; one end of the midspan strand adjusting mechanism is fixed on a saddle groove of a main cable saddle 63, and the other end of the midspan strand adjusting mechanism is fixed on a cable holder 66 on a midspan strand to be adjusted 65 in the main span direction.
When the cable strand adjusting device is used for adjusting the elevation of the side span cable strand, the cable strand adjusting device is arranged on the gantry beam of the scattered cable saddle and is used for adjusting the elevation of the cable strand mid span and is arranged on the tower top main cable saddle 63. The invention utilizes the dispersed cable saddle portal beam and the main cable saddle groove wall plate as the anchoring stress points of the adjusting device, fully utilizes the existing components and has safe and reliable anchoring stress.
Example two:
referring to fig. 1, 2, 5 to 7, 8 to 17, 20 and 21, the strand adjusting device for erecting a main cable in a suspension bridge aerial spinning method comprises an edge span strand adjusting mechanism based on the first embodiment
The reaction beam unit 1 is fixed on a cross beam of the cable saddle buttress gantry 61 through a fixing piece;
the first connecting piece units 3 are at least provided with two groups, and two of each group are arranged on one side of the counter-force beam unit 1 in a pairwise parallel and symmetrical manner;
a reaction base unit 2, wherein the reaction base unit 2 is connected to the reaction beam unit 1 through a first connecting piece unit 3;
the penetrating jack 9 is used for adjusting the sag of the rope strand 64 to be adjusted at the side span, the penetrating jack 9 is supported on the counter-force seat unit 2, and a second anchorage device 10 is arranged on the top surface of the penetrating jack 9;
the second connector units 4, the second connector units 4 include at least two groups, and the two groups of second connector units 4 are symmetrically arranged at two sides of the side span cable strand 64 to be adjusted of the far discrete cable saddle, one end of the second connector unit 4 is connected with the cable holder 66 fixed on the side span cable strand 64 to be adjusted;
the steel bundle 5, the steel bundle 5 includes two at least, and two strand 5 symmetrical arrangement are in the both sides of the span cable strand 64 of treating adjusting, and the stiff end of every strand 5 all is connected with the other end of second connecting piece unit 4 through third ground tackle 12, third clamping piece 13, and the end of stretching of every strand 5 all passes reaction seat unit 2 and punch jack 9 and passes through second ground tackle 10, second clamping piece 11 fixedly.
Further, the reaction beam unit 1 at least comprises two anchoring section steels 32, a plurality of second stiffening plates 33, two first anchoring ear plates 40 and a plurality of third stiffening plates 39; the two anchoring section steels 32 are arranged in parallel, and a plurality of second stiffening plates 33 are arranged between the two anchoring section steels 32 and are vertical to the two anchoring section steels 32; the two anchoring section steels 32 and the second stiffening plates 33 form a counter-force beam; two first anchoring ear plates 40 are symmetrically arranged on a flange plate on one side of the counterforce beam; the reaction beam is connected with the first connecting piece unit 3 through the first anchoring lug plate 40; a plurality of third stiffening plates 39 are respectively arranged on two sides of the first anchoring ear plate 40; the reaction beam is fixed on the beam of the cable saddle buttress gantry 61 through a fixing piece.
Further, the fixing member includes a flange connecting plate 36, an upper web connecting plate 34 and a bottom web connecting plate 35; the upper web connecting plate 34 and the bottom web connecting plate 35 are respectively detachably connected to a web plate on the reaction beam and a web plate on a beam of the cable saddle buttress portal 61; one side of the flange connecting plate 36 is fixed with the flange plate on the reaction beam, and the other side is fixed with the flange plate on the beam of the cable saddle gantry.
Further, the first connector unit 3 includes at least one eyeglass plate 52 and four second reinforcement plates 31; the two sides of the pin hole at the two arc ends of the glasses plate 52 are respectively provided with a second reinforcing plate 31; the number of the first connecting piece units 3 is at least four, the two first connecting piece units are a group and are arranged in parallel, one ends of the two groups of the first connecting piece units 3 are respectively connected and fixed with two ends of the counter-force seat unit 2, and the other ends of the two groups of the first connecting piece units 3 are respectively connected and fixed with the counter-force beam unit 1.
Furthermore, the reaction force seat unit 2 at least comprises a supporting beam and a support frame of the piercing jack; the supporting beam consists of two supporting beam web plates 18 which are vertically arranged in parallel, a supporting beam top plate 19, a supporting beam bottom plate 20, two connecting end plates 22 for supporting the beam ends and a plurality of supporting beam stiffening plates 21; the middle parts of the supporting beam top plate 19 and the supporting beam bottom plate 20 are provided with strip-shaped holes with the same size; the top of each connecting end plate 22 is arc, pin holes are formed in the ends of the arc, a first reinforcing plate 24 is arranged on each of two sides of each pin hole, and a first reinforcing plate 23 is connected between each connecting end plate 22 and the top plate 19 of the support beam; the support frame of the center-penetrating jack is formed into a sheet frame structure by the crossed arrangement of two first vertical support plates 26 arranged in parallel, two second vertical support plates 42, two third vertical support plates 43, two fourth vertical support plates 44 and a plurality of transverse support plates 25 arranged in parallel; the two first vertical supporting plates 26 and the two second vertical supporting plates 42 are vertically fixed on the supporting beam top plate 19 at intervals, and the second vertical supporting plates 42 are arranged in the two first vertical supporting plates 26; the transverse support plate 25 is fixedly connected with the first vertical support plate 26, the second vertical support plate 42, the third vertical support plate 43 and the fourth vertical support plate 44 in a cross manner to form a frame structure; the middle part of the transverse supporting plate 25 is arranged to be arc-shaped; a jack support seat 6 is fixed on one side of the support beam connected with the center-penetrating jack support frame; the jack support seat 6 comprises a support seat bottom plate 46, a support seat wall plate 47 and a support seat top plate 48; the supporting seat bottom plate 46, the supporting seat wall plate 47 and the supporting seat top plate 48 are fixedly connected in sequence from bottom to top to form a cylindrical supporting body; hand holes are symmetrically formed in the two opposite supporting seat wall plates 47, and bolt holes are formed in four corners of the supporting seat bottom plate 46; the supporting beam top plate 19 is fixedly connected with a first anchorage device 7, and a first clamping piece 8 is connected in the first anchorage device 7.
Further, the second connector unit 4 includes a sixth reinforcing plate 53, a connecting ear plate 54, an anchoring base plate 56, a fourth stiffening plate 57 and a fifth stiffening plate 58; two connecting lug plates 54 are vertically arranged in parallel, each connecting lug plate 54 is a rectangular plate with one circular arc end, a pin hole is formed in each circular arc end, and seventh reinforcing plates 55 are respectively arranged on the inner sides of the pin holes of the two connecting lug plates 54; the other ends of the two connecting ear plates 54 are vertically fixed on the anchoring bottom plate 56, two fifth stiffening plates 58 are horizontally arranged at intervals on the inner sides of the two connecting ear plates 54, and two sixth reinforcing plates 53 are wrapped on the outer sides of the fifth stiffening plates 58; two parallel fourth stiffening plates 57 are arranged on the inner sides of the two sixth stiffening plates 53 at intervals perpendicular to the sixth stiffening plates; the two connecting plate ear plates 54, the two fifth stiffener plates 58 and the anchoring bottom plate 56 form a box-shaped structure together.
In actual use, firstly, a reaction beam unit 1 is installed on a cross beam of the cable saddle buttress gantry 61; during installation, four second stiffening plates 33 are respectively arranged between two opposite side webs of each anchoring section steel 32 according to a certain distance, two first anchoring ear plates 40 are arranged on one side flange plate of the anchoring section steel 32 at intervals and symmetrically, and the two second stiffening plates 33 on two sides of the webs at two end parts correspond to the first anchoring ear plates 40 in position; the two anchoring sections 32 are assembled together to form a counter-force beam. A pin hole is formed in the arc section of the first anchoring ear plate 40, two third reinforcing plates 41 are respectively arranged on two sides of the pin hole, and three third reinforcing plates 39 are respectively arranged on two sides of the first anchoring ear plate 40 and are welded and fixed with the flange of the counter-force beam; the flange connecting plate 36, the top web connecting plate 34 and the bottom web connecting plate 35 are respectively arranged on the flanges at the two sides of the reaction beam at the two ends of the reaction beam. Two ends of the anchoring steel 32 are respectively connected and fixed with flanges and web plates corresponding to the cross beam of the cable saddle buttress portal 61 through a flange connecting plate 36, an upper web connecting plate 34 and a bottom web connecting plate 35 through a first high-strength bolt 37 and a second high-strength bolt 38, and then the reaction beam unit 1 is connected and fixed on the cross beam of the cable saddle buttress portal 61; then, the first connecting piece units 3 are arranged in parallel in pairs to form a group, one end of each group of the first connecting piece units 3 is respectively connected with the component connecting end plate 22 of the reaction seat unit 2 through the second connecting pin shaft 16, and the end of the second connecting pin shaft 16 is clamped and fixed by the first clamping plate 27 and the first fastening bolt 28 corresponding to the second connecting pin shaft 16, so that the reliable connection with the reaction seat unit 2 is ensured; the other end of each group of first connecting piece units 3 connects the first anchoring ear plates 40 of the components in the counter-force beam unit 1 arranged on the gantry beam of the saddle bracket through the third connecting pin shaft 17, and the second clamping plates 29 and the second fastening bolts 30 corresponding to the third connecting pin shaft 17 are adopted to clamp and fix the end of the third connecting pin shaft 17, so that the reliable connection with the counter-force beam unit 1 is ensured; subsequently, the jack support seat 6 is fixed on the counter force seat unit 2; when the jack support seat is fixed, the jack support seat 6 is fixedly connected with the support beam top plate 19 on the counter-force seat unit 2 through the support seat bottom plate 46 and at least four third fastening bolts 60, the bottom end of the center-penetrating jack 9 is supported on the top surface of the jack support seat 6, and the jack body is installed in the arc-shaped groove of the support frame transverse support plate 25, so that the stable installation of the jack is ensured. Two groups of second connecting piece units 4 are symmetrically arranged at two sides of the side span cable strand 64 to be adjusted and are respectively fixed with the cable holders 66 on the side span cable strand 64 to be adjusted far away from the cable saddle; then two steel bundles 5 are installed; each strand of steel strand 5 is symmetrically arranged on two sides of the span cable strand 64 to be adjusted, one end of each strand of steel strand 5 is respectively connected with the second connecting piece unit 4 through the third anchorage device 12 and the third clamping piece 13 in an anchoring mode, and the other end of each strand of steel strand 5 sequentially penetrates through the first anchorage device 7 and the center-penetrating jack 9 to be connected with the second anchorage device 10.
When the side span cable strand is adjusted, firstly, the second clamping piece 11 and the second anchorage device 10 are utilized to fix the end of the steel bundle 5 penetrating out of the center-penetrating jack 9 on the end surface of the oil cylinder of the center-penetrating jack 9, the center-penetrating jack 9 supports against the second anchorage device 10 to stretch the steel bundle 5, and the stretching force is transmitted to the cable holder 66 fastened with the adjusting cable strand to drive the cable strand to move. For the cable strand with large adjustment amount, because the stroke of the penetrating jack 9 is limited, the stroke of the penetrating jack 9 needs to be changed for many times, and the specific operation is as follows: after the center-penetrating jack 9 jacks the second anchorage device 10 for a stroke, the first clamping piece 8 is installed in the first anchorage device 7 which penetrates through the steel bundle 5, the center-penetrating jack 9 returns oil, the steel bundle 5 is anchored on a supporting beam top plate 19 on the counter-force seat unit 2 through the first anchorage device 7, the second anchorage device 10 moves to the end face of an oil cylinder of the center-penetrating jack 9, the second clamping piece 11 fastens the steel bundle 5 in the second anchorage device 10 again, and the center-penetrating jack 9 jacks the second anchorage device 10 again to stretch the steel bundle 5, so that the movement of the strand is realized. And repeating the operation until the elevation of the adjusted cable strand reaches the design requirement, and then driving a wedge-shaped wood block into the saddle groove where the adjusted cable strand is located to fasten the cable strand in the saddle groove of the main cable saddle to complete the elevation adjustment of the mid-span cable strand.
When the device is used specifically, one side of the flange connecting plate 36 is welded and fixed with the flange plate on the reaction beam, and the other side of the flange connecting plate is fixed with the flange plate on the cable saddle gantry beam through a bolt. The flange connecting plates 36 are respectively arranged on the flanges at two sides of the two ends of the counter-force beam, the web plates at two sides are respectively provided with the upper web connecting plate 34 and the bottom web connecting plate 35, and the upper web connecting plate 34 and the bottom web connecting plate 35 are respectively detachably connected to two sides of the web plates at two ends of the counter-force beam; flange connecting plates 36 are fixedly connected to opposite outer side flanges of the reaction beam at the positions of the upper web connecting plate 34 and the bottom web connecting plate 35.
The cable saddle portal beam and the anchoring section steel 32 in the embodiment are both H-shaped steel.
The invention adopts modular unit design for each component, and the modular units are connected by pin shafts, so that the assembly and disassembly are convenient, and the turnover reuse rate is high. The invention realizes the elevation adjustment by driving the cable strand to move through the multi-stroke tensioning steel bundle of the punching jack. The cable strand adjustment tension is big, and the adjustment range is big and can accurate control cable strand displacement volume, and the adjustment accuracy is high, has solved the problem of large-tonnage cable strand adjustment high-efficiently, and the practicality is strong.
Example three:
referring to fig. 3, 4 and 8 to 21, in a first embodiment, a strand adjusting device for erecting a main cable by a suspension bridge air spinning method is shown: the mid-span strand adjusting mechanism comprises
The reaction lug plate units 14 are at least provided in two groups, and the two groups of reaction lug plate units 14 are respectively arranged on two outer side wall plates of the main cable saddle groove;
a reaction force seat unit 2, wherein the reaction force seat unit 2 is fixed on the tower top main cable saddle 63 through a reaction force ear plate unit 14;
the penetrating jack 9 is supported on the counter-force seat unit 2, and is used for adjusting the sag of the mid-span cable strand 65 to be adjusted;
the second connecting element units 4, the second connecting element units 4 include at least two groups, and the two groups of second connecting element units 4 are symmetrically arranged at two sides of the cable strand 65 to be adjusted in the midspan of the main cable saddle, and one end of the second connecting element unit 4 is connected with the cable holder 66 fixed on the cable strand 65 to be adjusted in the midspan;
the steel bundle 5, the steel bundle 5 includes two at least, and two strand 5 symmetrical arrangement are in midspan treat adjusting strand 65 both sides, and the stiff end of every strand 5 all passes through third ground tackle 12, the other end fixed connection of third clamping piece 13 and second connecting piece unit 4, and the tensioning end of every strand 5 is all fixed through second ground tackle 10, second clamping piece 11 behind first ground tackle 7, first clamping piece 8, reaction seat unit 2 and the punch jack 9.
Further, the reaction ear plate unit 14 at least includes a second anchoring ear plate 49, a fourth reinforcing plate 50 and a fifth reinforcing plate 51; the second anchor ear plate 49 is an integral structure composed of a triangular plate and a rectangular plate which are arranged up and down; the long edge of the triangular plate is connected with the long edge of the rectangular plate; the vertex angle of the triangular plate adopts circular arc transition and is provided with a pin hole, and the two sides of the pin hole are respectively provided with a fourth reinforcing plate 50; the rectangular plate is symmetrically provided with two pin holes, and the two sides of the two pin holes are respectively provided with a fifth reinforcing plate 51; the rectangular plate is fixedly connected with the side wall of the saddle groove of the main cable saddle, and the triangular plate is fixedly connected with the counter-force seat unit 2.
Further, the second connector unit 4 includes a sixth reinforcing plate 53, a connecting ear plate 54, an anchoring base plate 56, a fourth stiffening plate 57 and a fifth stiffening plate 58; two connecting lug plates 54 are vertically arranged in parallel, each connecting lug plate 54 is a rectangular plate with one circular arc end, a pin hole is formed in each circular arc end, and seventh reinforcing plates 55 are respectively arranged on the inner sides of the pin holes of the two connecting lug plates 54; the other ends of the two connecting ear plates 54 are vertically fixed on the anchoring bottom plate 56, two fifth stiffening plates 58 are horizontally arranged at intervals on the inner sides of the two connecting ear plates 54, and two sixth reinforcing plates 53 are wrapped on the outer sides of the fifth stiffening plates 58; two parallel fourth stiffening plates 57 are arranged on the inner sides of the two sixth stiffening plates 53 at intervals perpendicular to the sixth stiffening plates; the two connecting plate ear plates 54, the two fifth stiffener plates 58 and the anchoring bottom plate 56 form a box-shaped structure together.
Furthermore, the reaction force seat unit 2 at least comprises a supporting beam and a support frame of the piercing jack; the supporting beam consists of two supporting beam web plates 18 which are vertically arranged in parallel, a supporting beam top plate 19, a supporting beam bottom plate 20, two connecting end plates 22 for supporting the beam ends and a plurality of supporting beam stiffening plates 21; the middle parts of the supporting beam top plate 19 and the supporting beam bottom plate 20 are provided with strip-shaped holes with the same size; the top of each connecting end plate 22 is arc, pin holes are formed in the ends of the arc, a first reinforcing plate 24 is arranged on each of two sides of each pin hole, and a first reinforcing plate 23 is connected between each connecting end plate 22 and the top plate 19 of the support beam; the support frame of the center-penetrating jack is formed into a sheet frame structure by the crossed arrangement of two first vertical support plates 26 arranged in parallel, two second vertical support plates 42, two third vertical support plates 43, two fourth vertical support plates 44 and a plurality of transverse support plates 25 arranged in parallel; the two first vertical supporting plates 26 and the two second vertical supporting plates 42 are vertically fixed on the supporting beam top plate 19 at intervals, and the second vertical supporting plates 42 are arranged in the two first vertical supporting plates 26; the transverse support plate 25 is fixedly connected with the first vertical support plate 26, the second vertical support plate 42, the third vertical support plate 43 and the fourth vertical support plate 44 in a cross manner to form a frame structure; the middle part of the transverse supporting plate 25 is arranged to be arc-shaped; a jack support seat 6 is fixed on one side of the support beam connected with the center-penetrating jack support frame; the jack support seat 6 comprises a support seat bottom plate 46, a support seat wall plate 47 and a support seat top plate 48; the supporting seat bottom plate 46, the supporting seat wall plate 47 and the supporting seat top plate 48 are fixedly connected in sequence from bottom to top to form a cylindrical supporting body; hand holes are symmetrically formed in the two opposite supporting seat wall plates 47, and bolt holes are formed in four corners of the supporting seat bottom plate 46; a first anchorage device 7 is fixedly connected to the top plate 19 of the support beam, and a first clamping piece 8 is connected to the first anchorage device 7; the jack support seat 6 is fixedly connected with the support beam top plate 19 through a support seat bottom plate 46.
In actual use, reaction lug plate units 14 are respectively arranged on the two outermost side walls of the main cable saddle groove; the single reaction lug plate unit 14 is fixedly connected with the outermost side wall plate of the main cable saddle groove through the second anchoring lug plate 49 by using the two first connecting pin shafts 15, and the circular arc end of the second anchoring lug plate 49 is fixedly connected with the connecting end plate 22 on the reaction seat unit 2 through the fourth connecting pin shaft 45, so that the anchoring connection of the reaction seat unit 2 on the main cable saddle 63 is realized. Then, in the same way as the side span strand adjusting mechanism, the finished installation of the penetrating jack 9 on the reaction seat unit 2, the installation of the second connecting assembly unit 4 and a cable holder 66 on a span strand 65 to be adjusted in the main span direction away from the main saddle, and the installation of the two ends of the tension steel bundle 5 and the first anchor 7, the penetrating jack 9, the second anchor 10, the second clamping piece 11, the third anchor 12 and the third clamping piece 13 are respectively carried out; during midspan adjustment, the second clamping piece 11 and the second anchorage device 10 are utilized to fix the end of the steel strand 5 penetrating out of the center-penetrating jack 9 on the end surface of the oil cylinder of the center-penetrating jack 9, the center-penetrating jack 9 supports against the second anchorage device 10 to stretch the steel strand 5, and the stretching force is transmitted to the cable holder 66 fastened with a cable strand to be adjusted to drive the cable strand to move; for the strand with large adjustment amount, the specific operation is as follows: after the center-penetrating jack 9 jacks the second anchorage device 10 for a stroke, the first clamping piece 8 is installed in the first anchorage device 7 which penetrates through the steel bundle 5, the center-penetrating jack 9 returns oil, the steel bundle 5 is anchored on a supporting beam top plate 19 of the counter-force seat unit 2 through the first anchorage device 7, the second anchorage device 10 moves to the end face of an oil cylinder of the center-penetrating jack 9, the second clamping piece 11 fastens the steel bundle 5 in the second anchorage device 10 again, and the center-penetrating jack 9 jacks the second anchorage device 10 again to stretch the steel bundle 5 so as to realize the movement of a cable strand; and repeating the operation until the elevation of the adjusted cable strand reaches the design requirement, and then driving a wedge-shaped wood block into the saddle groove where the adjusted cable strand is located to fasten the cable strand in the saddle groove of the main cable saddle to complete the elevation adjustment of the mid-span cable strand.
In this embodiment, the jack support base 6 is fixedly connected to the support beam top plate 19 through the support base plate 46 by the third fastening bolt 60, so that the connection and the detachment are facilitated.
Example four:
referring to fig. 1 to 21, in a construction adjustment method of a strand adjustment device for erecting a main cable by a suspension bridge aerial spinning method, the strand adjustment device is respectively installed on a beam of a dispersed cable saddle portal frame and a main cable saddle 63 of a main tower top tower. A cable strand adjuster arranged on a beam of the scattered cable saddle gantry is used for adjusting the elevation of the side span cable strand, and is arranged on a main cable saddle on the tower top and used for adjusting the elevation of the mid span of the cable strand;
comprises the following steps of (a) carrying out,
the method comprises the following steps: the reaction beam unit 1 is arranged on the beam of the cable saddle buttress gantry 61
Two ends of the anchoring steel 32 are respectively connected and fixed with flanges and web plates corresponding to the cross beam of the cable saddle buttress portal 61 through a flange connecting plate 36, an upper web connecting plate 34 and a bottom web connecting plate 35 through a first high-strength bolt 37 and a second high-strength bolt 38, and then the reaction beam unit 1 is connected and fixed on the cross beam of the cable saddle buttress portal 61;
step two: the first connecting piece units 3 are arranged in parallel in pairs to form a group, one end of each group of the first connecting piece units 3 is respectively connected with the component connecting end plate 22 of the reaction seat unit 2 through the second connecting pin shaft 16, and the end of the second connecting pin shaft 16 is clamped and fixed by the first clamping plate 27 and the first fastening bolt 28 corresponding to the second connecting pin shaft 16, so that the reliable connection with the reaction seat unit 2 is ensured; the other end of each group of first connecting piece units 3 connects the first anchoring ear plates 40 of the components in the counter-force beam unit 1 arranged on the gantry beam of the saddle bracket through the third connecting pin shaft 17, and the second clamping plates 29 and the second fastening bolts 30 corresponding to the third connecting pin shaft 17 are adopted to clamp and fix the end of the third connecting pin shaft 17, so that the reliable connection with the counter-force beam unit 1 is ensured;
step three: fixing the jack support seat 6 on the counter-force seat unit 2; the jack support seat 6 is fixedly connected with the support beam top plate 19 on the counter-force seat unit 2 through the support seat bottom plate 46 and at least four third fastening bolts 60, the bottom end of the center-penetrating jack 9 is supported on the top surface of the jack support seat 6, and the jacking body is installed in the arc-shaped groove of the support frame transverse support plate 25, so that the stable installation of the jack is ensured.
Step four: two groups of second connecting element units 4 are symmetrically arranged at two sides of the side span cable strand 64 to be adjusted and are respectively fixed with the cable holders 66 on the side span cable strand 64 to be adjusted far away from the cable scattering saddle;
step five: installing two steel bundles 5; each strand of steel bundle 5 is symmetrically arranged on two sides of the span cable strand 64 to be adjusted, one end of each strand of steel bundle 5 is respectively connected with the second connecting piece unit 4 through a third anchorage device 12 and a third clamping piece 13 in an anchoring manner, and the other end of each strand of steel bundle 5 sequentially passes through the first anchorage device 7 and the piercing jack 9 and is connected with the second anchorage device 10;
step six: reaction lug plate units 14 are respectively arranged on the two outermost side walls of the main cable saddle groove; the second anchoring ear plate 49 of the single reaction ear plate unit 14 is fixed on the outermost wall of the saddle groove of the main cable saddle, and the circular arc end on the second anchoring ear plate 49 is fixedly connected with the connecting end plate 22 on the reaction seat unit 2;
step seven: according to the construction method of the third step, the fourth step and the fifth step, the installation of the center-penetrating jack 9 of the midspan strand adjusting mechanism at the position of the main cable saddle on the counterforce seat unit 2, the installation of the second connecting assembly unit 4 and the cable holder 66 on the midspan strand 65 to be adjusted in the main span direction away from the main cable saddle, and the installation of the two ends of the tension steel beam 5 and the first anchorage 7, the center-penetrating jack 9, the second anchorage 10, the second clamping piece 11, the third anchorage 12 and the third clamping piece 13 are respectively completed;
step eight: the main cable strand elevation adjustment sequence is first midspan and then side span; the adjustment of the mid-span enters the step nine, and the adjustment of the side-span enters the step ten;
step nine: fixing the end of the steel strand 5 penetrating out of the through jack 9 on the end surface of the oil cylinder of the through jack 9 by using the second clamping piece 11 and the second anchorage device 10, and enabling the through jack 9 to press the second anchorage device 10 to stretch the steel strand 5, and transmitting the stretching force to a cable holder 66 fastened with a cable strand to be adjusted to drive the cable strand to move; for the strand with large adjustment amount, the specific operation is as follows: after the center-penetrating jack 9 jacks the second anchorage device 10 for a stroke, the first clamping piece 8 is installed in the first anchorage device 7 which penetrates through the steel bundle 5, the center-penetrating jack 9 returns oil, the steel bundle 5 is anchored on a supporting beam top plate 19 of the counter-force seat unit 2 through the first anchorage device 7, the second anchorage device 10 moves to the end face of an oil cylinder of the center-penetrating jack 9, the second clamping piece 11 fastens the steel bundle 5 in the second anchorage device 10 again, and the center-penetrating jack 9 jacks the second anchorage device 10 again to stretch the steel bundle 5 so as to realize the movement of a cable strand; repeating the operation until the elevation of the adjusted cable strand reaches the design requirement, driving a wedge-shaped wood block in the saddle groove where the adjusted cable strand is located, fastening the cable strand in the saddle groove of the main cable saddle, and completing the elevation adjustment of the mid-span cable strand;
step ten: and adjusting the adjusted cable strand to the designed elevation position at the side span by using a side span cable strand adjusting mechanism arranged on a beam of the dispersed cable saddle gantry according to the operation steps of the step nine, and driving a wedge-shaped wood block into a saddle groove of the dispersed cable saddle to fasten the adjusted cable strand on the dispersed cable saddle.
In practical use, the two groups of second connector units 4 are symmetrically arranged on two sides of the adjusting strand, and each group of second connector units 4 is fixed with the cable holder 66 arranged on the side span strand at a certain distance from the cable saddle through the connecting lug plate 54 and the fifth connecting pin 59.
The invention adopts modular unit design for each component, and the modular units are connected by pin shafts, so that the assembly and disassembly are convenient, and the turnover reuse rate is high. The invention realizes the elevation adjustment by driving the cable strand to move through the multi-stroke tensioning steel bundle of the punching jack. The strand adjustment tension is big, and the adjustment range is big and can accurate control strand displacement volume, and the adjustment accuracy is high, has solved the problem of large-tonnage strand adjustment high-efficiently, and the practicality is stronger. The invention fully utilizes the cross beam of the dispersed cable saddle portal frame and the main cable saddle groove wall plate of the existing component as the anchoring stress point of the adjusting device, and the anchoring stress is safe and reliable.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
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|---|---|---|---|---|
| CN114296386A (en) * | 2021-11-15 | 2022-04-08 | 中交二公局第二工程有限公司 | A control method for erecting main cables based on the aerial spinning method of suspension bridges |
| WO2023173588A1 (en) * | 2022-03-16 | 2023-09-21 | 中铁九桥工程有限公司 | Construction method for splay cable sleeve of suspension bridge |
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