CN114164771B - Prepressing device and prepressing method for overhead bridge cantilever pouring hanging basket - Google Patents
Prepressing device and prepressing method for overhead bridge cantilever pouring hanging basket Download PDFInfo
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- CN114164771B CN114164771B CN202111387788.2A CN202111387788A CN114164771B CN 114164771 B CN114164771 B CN 114164771B CN 202111387788 A CN202111387788 A CN 202111387788A CN 114164771 B CN114164771 B CN 114164771B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
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Abstract
The invention discloses a pre-pressing device and a pre-pressing method for cantilever pouring of a viaduct, which belong to the field of pre-pressing of hanging baskets, and comprise a transverse beam, wherein the right side of the top of the transverse beam is connected with the lower end of an inclined beam, and the upper end of the inclined beam is obliquely arranged leftwards, and the pre-pressing device further comprises: the movable gasket component comprises a connecting block, a first base plate and a hinged support, wherein the connecting block is fixed at the bottom of the left end of the cross beam, the connecting block is movably connected with the hinged support through a movable shaft, and the first base plate is connected with the bottom of the hinged support; the prepressing power unit comprises a second base plate, a limiting ring, a jack, a baffle and a jacking column, wherein the second base plate is arranged below the cross beam and corresponds to the lower end of the oblique beam. Can carry out the pre-compaction to the basket of hanging of multiple size, can dismantle folding, convenient transportation also conveniently assembles simultaneously, can avoid the reaction frame to hang the bottom tip atress too big when basket load, avoid damaging to basket front cross beam.
Description
Technical Field
The invention relates to the technical field of pre-pressing of hanging baskets, in particular to a pre-pressing device and a pre-pressing method for cantilever casting hanging baskets of a viaduct.
Background
At present, in the use of the overhead bridge cantilever pouring hanging basket, the whole stability of the hanging basket is checked by a prepressing means, the elastic deformation and inelastic deformation of the hanging basket are detected, the structural stress of the whole system under various working conditions and the running condition of equipment are detected;
the prepressing device in the prior art generally adopts a reaction frame to be placed on a front beam of the bottom basket, then a jack is placed between the reaction frame and the front beam of the bottom basket, and load is loaded through the jack, so that the hanging basket is prepressed;
the reaction frame in the existing prepressing device is formed by welding, can only prepress the hanging basket with one size, is inconvenient in transportation, is overlarge in bottom end part stress when loading the hanging basket, and is easy to damage the front cross beam of the bottom basket.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, when in actual use, only a hanging basket with one size can be pre-pressed, a reaction frame is inconvenient to transport, and the bottom end part of the reaction frame is stressed too much when loading the hanging basket with load, and provides a pre-pressing device and a pre-pressing method for cantilever casting the hanging basket of a viaduct.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a pre-compaction device of basket is hung in overpass cantilever pouring, includes the crossbeam of horizontal setting, the lower extreme of sloping is connected on the top right side of crossbeam, the upper end of sloping sets up to the slope left, still includes:
the movable gasket component comprises a connecting block, a first base plate and a hinged support, wherein the connecting block is fixed at the bottom of the left end of the cross beam, the connecting block is movably connected with the hinged support through a movable shaft, and the first base plate is connected with the bottom of the hinged support;
the prepressing power unit comprises a second base plate, a limiting ring, a jack, a baffle and a jacking column, wherein the second base plate is arranged below the cross beam and corresponds to the lower end position of the oblique beam, the limiting ring is arranged on the second base plate, the bottom end of the jack is placed in the limiting ring, the top of the jack is connected with the longitudinal jacking column, an arc-shaped groove corresponding to the jacking column is arranged on the lower side of the cross beam, and the baffle is arranged on two sides of the arc-shaped groove respectively.
Through crossbeam and sloping formation reaction frame, can increase the area of contact with the bottom thing through the backing plate one in the movable liner subassembly, avoid the damage of the left end of sloping to the bottom after the jack loading, can make the right-hand member of sloping rise back through connecting block and hinged support, backing plate one still level, avoid backing plate one along with the perk of sloping right-hand member, can increase the area of contact of jack and bottom through backing plate two, can restrict the position of jack through the spacing collar, the jack-prop and the arc groove cooperation at top, and it is spacing to the jack-prop through the baffle, avoid the top of jack and the bottom arc groove slippage of sloping, the stability of jack and reaction frame junction when guaranteeing the loading.
Preferably, the device further comprises a jacking measuring piece, and the jacking measuring piece is arranged on the second base plate. The lifting height of the jack can be measured through the measuring piece, and the lifting device has reference significance on loading force.
Preferably, the device further comprises a movable assembly, a diagonal beam supporting assembly and a diagonal beam inclination control unit, wherein the right side of the top of the cross beam is movably connected with the lower end of the diagonal beam through the movable assembly, the lower side of the diagonal beam is connected with one end of the diagonal beam supporting assembly, the diagonal beam inclination control unit is arranged on the cross beam, and the other end of the diagonal beam supporting assembly is connected with the diagonal beam inclination control unit.
The movable component enables the inclined beam to move relative to the cross beam, simultaneously the inclined beam and the cross beam can be detached, the transportation is convenient, the installation is convenient, and the inclined beam supporting component can be driven to move through the inclined beam inclination control unit, so that the inclination angle of the inclined beam can be changed as required.
Preferably, the oblique beam supporting component comprises a movable seat and a supporting rod, wherein the movable seat is fixedly connected to the lower side of the oblique beam, and the movable seat is movably connected with the top end of the supporting rod. The angle change of the stay bar can change the supporting degree of the inclined beam, thereby changing the inclination angle of the inclined beam.
Preferably, the oblique beam inclination control unit comprises a rectangular chute, a sliding block and a threaded rod, wherein the rectangular chute is formed in the left side of the top of the cross beam, the threaded rod is connected with the inner side of the rectangular chute in a rotating mode, the sliding block is connected in the rectangular chute in a sliding mode, the threaded rod is in threaded connection with a screw hole on the side face of the sliding block, and the top of the sliding block is movably connected with the bottom end of the supporting rod.
The threaded rod is twisted to extend out of one end of the rectangular sliding groove, and the sliding block slides in the rectangular sliding groove due to the threaded action of the threaded rod and the sliding block, so that the bottom of the supporting rod is pushed to move, the inclination angle of the oblique beam is changed, the reaction frame can be adjusted, and the application range of the reaction frame can be enlarged.
Preferably, the oblique beam inclination control unit further comprises fixing strips, fixing holes and inserting rods, the fixing strips are respectively arranged on the front side and the rear side of the top of the cross beam, the fixing holes are formed in the fixing strips at equal intervals, and the inserting rods inserted in the fixing holes are inserted into the side faces of the sliding blocks.
The sliding block slides to a required position in the rectangular sliding groove, the sliding block is inserted into a fixed hole corresponding to the sliding block through the inserted link and then is inserted into the sliding block, the sliding block is fixed, and the position of the sliding block in the rectangular sliding groove is prevented from being influenced by rotation of the threaded rod.
Preferably, the sloping includes loop bar, slide bar and flexible control assembly, the inside middle part of loop bar sets up and the inside bottom sliding connection with the slide bar in top, movable assembly is connected to the bottom of loop bar, and the top downside fixed connection movable seat of loop bar, the upside of loop bar and slide bar is connected through flexible control assembly.
The sliding rod can be controlled to slide in the loop bar through the telescopic control assembly, so that the length of the inclined beam is changed, the size of the reaction frame can be changed, and the application range is improved.
Preferably, the device further comprises a reinforcing component, wherein the reinforcing component is arranged on the outer side of the upper end of the loop bar. The reinforcing component can prevent the sliding rod from damaging the outer side of the port of the loop bar due to overlarge force on the port side surface of the loop bar.
Preferably, the device further comprises a top support assembly, and the top end of the sliding rod is provided with the top support assembly. The top support component is convenient to connect with the corresponding position of the hanging basket.
The pre-pressing method of the pre-pressing device of the overhead bridge cantilever pouring hanging basket specifically comprises the following steps:
s1: determining a pre-pressing control beam section, carrying out a basket hanging pre-pressing test according to the heaviest beam section by calculating, analyzing and comparing working conditions of the basket hanging, and carrying out basket hanging pre-pressing work after all components of the basket are installed and a bottom plate is installed;
s2: the settlement observation points are respectively arranged on the rear anchor and the bottom die of the hanging basket, and the total of nine settlement observation points are measured according to the staged loading and unloading, so that the elastic deformation and the inelastic deformation of the main truss and the template of the hanging basket are measured;
s3: the method comprises the steps of installing a pre-pressing device, installing a pre-pressing device of a cantilever casting hanging basket of a viaduct on a box girder web, placing a cross beam of the pre-pressing device of the cantilever casting hanging basket of the viaduct on a front cross beam of a bottom basket, and placing a jack between the front cross beam of the bottom basket and the cross beam;
s4: marking, namely measuring elevation of each monitoring point by using a level gauge before loading, recording initial elevation, and then starting to load in a grading manner by using a jack;
s5: the loading of the jack is classified into 10%, 50%, 100% and 120%, for 10%, 50% and 100% of three-stage loads, the load is kept for 5-10 minutes when the jack is loaded to each stage of load, and the elevation of each monitoring point is measured by a leveling instrument after deformation is stable;
s6: when loaded to 120% of this level load, the load was maintained for 3-5 hours;
s7: unloading the jack oil meter when the height of the monitoring point is unchanged by reading the jack oil meter and measuring the height of the monitoring point by using a level gauge, and recording data;
s8: and (3) the load is also subjected to grading unloading, 100% -40% -10% -0% of the load is respectively unloaded, the load is kept for 5-10 minutes when the load is unloaded to each grade, and the elevation of each monitoring point is measured by using a level gauge.
Compared with the prior art, the invention provides the prepressing device and the prepressing method for the overhead bridge cantilever pouring hanging basket, which have the following beneficial effects:
1. this pre-compaction device of hanging basket is pour to overpass cantilever forms the reaction frame through crossbeam and sloping, can increase the area of contact with the bottom thing through backing plate one in the movable liner subassembly, avoid the damage of the left end of sloping to the bottom after the jack loading, after can making the right-hand member of sloping rise through connecting block and hinged support, backing plate one still level, avoid backing plate one along with the perk of sloping right-hand member, can increase the area of contact of jack and bottom through backing plate two, can restrict the position of jack through the spacing collar, the jack-prop and the arc groove cooperation at top, and it is spacing to the jack-prop through the baffle, the top of avoiding the jack and the bottom arc groove slippage of sloping, the stability of jack and reaction frame junction when guaranteeing the loading.
2. This pre-compaction device of hanging basket is pour to overpass cantilever can carry out the pre-compaction to the hanging basket of multiple size, can dismantle folding, and convenient transportation also conveniently assembles simultaneously, and bottom tip atress is too big when can avoiding the reaction frame to hanging basket load, avoids damaging to basket front beam.
3. The pre-pressing device for the overhead bridge cantilever pouring hanging basket has the advantages that the degree and the size of elastic deformation and inelastic deformation of the hanging basket are mastered through pre-pressing, mechanical performance indexes such as rigidity of the hanging basket are mastered more accurately, the vertical die elevation of the hanging basket is guided, reliable reference data are provided for construction monitoring, the construction line type and elevation of a main beam are ensured to meet design and specification requirements, and the safety and normal operation of the hanging basket in the construction process are ensured.
The device has the advantages of wide application range and convenient adjustment, and the parts not related to the device are the same as or can be realized by adopting the prior art.
Drawings
Fig. 1 is a schematic structural diagram of a pre-pressing device for casting a hanging basket of a viaduct cantilever;
fig. 2 is a schematic diagram of a partial enlarged structure at a position a in fig. 1 of a pre-pressing device for pouring a hanging basket of a cantilever of a viaduct;
fig. 3 is a schematic diagram of the rear side structure of a pre-pressing device for casting a hanging basket of a cantilever of a viaduct;
fig. 4 is a schematic diagram of a partially enlarged structure at a position B in fig. 3 of a pre-pressing device for pouring a hanging basket of a cantilever of a viaduct;
fig. 5 is a schematic side structural view of a pre-pressing device for casting a hanging basket of a cantilever of a viaduct;
fig. 6 is a schematic diagram of a partially enlarged structure at C in fig. 5 of a pre-pressing device for casting a cradle of a viaduct cantilever according to the present invention.
In the figure: the device comprises a beam 1, a movable component 2, a hinging seat 21, a fixing bolt 22, a diagonal beam 3, a loop bar 31, a slide bar 32, a reinforcing bar 33, a fixing pin 34, a fixing nut 35, a pin hole 36, a mounting block 37, a telescopic control screw 38, a fixing block 39, a top support component 4, a top support block 41, a clamping groove 42, a diagonal beam support component 5, a movable seat 51, a supporting rod 52, a diagonal beam inclination control unit 6, a rectangular sliding groove 61, a sliding block 62, a threaded rod 63, a fixing bar 64, a fixing hole 65, a inserting rod 66, a movable liner component 7, a connecting block 71, a backing plate 72, a hinging support 73, a pre-pressing power unit 8, a backing plate 81, a limiting ring 82, a jack 83, a baffle 84, a supporting column 85, a jacking sleeve 9, a jacking indication rule 10, a reinforcing rib 11, a reinforcing frame 12 and a connecting rib 13.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Examples:
embodiment one, referring to fig. 1, a pre-compaction device of hanging basket is pour to overpass cantilever, including horizontal crossbeam 1 that sets up, the lower extreme of sloping 3 is connected on the top right side of crossbeam 1, and the upper end of sloping 3 inclines to the left and sets up, still includes:
the movable gasket assembly 7 comprises a connecting block 71, a first backing plate 72 and a hinged support 73, wherein the connecting block 71 is fixed at the bottom of the left end of the cross beam 1, the connecting block 71 is movably connected with the hinged support 73 through a movable shaft, and the first backing plate 72 is connected at the bottom of the hinged support 73;
the pre-compaction power unit 8 includes backing plate two 81, spacing ring 82, jack 83, baffle 84 and jack post 85, and the lower extreme position that corresponds sloping 3 in the below of crossbeam 1 is equipped with backing plate two 81, is equipped with spacing ring 82 on the backing plate two 81, and the bottom of jack 83 is placed in spacing ring 82, and the top of jack 83 is connected with fore-and-aft jack post 85, and the downside of crossbeam 1 is equipped with the arc wall that corresponds with jack post 85, and the bottom of crossbeam 1 is located the arc wall both sides and is equipped with baffle 84 respectively.
The counter-force frame is formed by the cross beam 1 and the inclined beam 3, the contact area between the first backing plate 72 in the movable liner assembly 7 and the bottom can be increased, the damage to the bottom by the left end of the inclined beam 3 after the jack 83 is loaded is avoided, the right end of the inclined beam 3 is lifted by the connecting block 71 and the hinged support 73, the first backing plate 72 is still horizontal, the first backing plate 72 is prevented from being lifted along with the right end of the inclined beam 3, the contact area between the jack 83 and the bottom can be increased by the second backing plate 81, the position of the jack 83 can be limited by the limiting ring 82, the jack post 85 at the top is matched with the arc-shaped groove, the limit of the jack post 85 is realized by the baffle 84, the top of the jack 83 and the bottom arc-shaped groove of the inclined beam 3 are prevented from slipping, and the stability of the connection position of the jack 83 and the counter-force frame is ensured when the load is loaded.
Referring to fig. 1, a pre-pressing device for casting a hanging basket on a cantilever of a viaduct is provided, which has the same structure as that of the first embodiment, and is different in that:
still include jack-up measuring part, be equipped with jack-up measuring part on backing plate two 81, jack-up measuring part includes fixed cover 9 and jack-up indicator 10, is equipped with fixed cover 9 on backing plate two 81, has pegged graft on the fixed cover 9 and has jack-up indicator 10. The lifting height of the jack 83 can be measured by jacking the indicating ruler 10, and the method has reference significance on loading force.
Referring to fig. 1-6, a pre-pressing device for casting hanging basket on cantilever of viaduct, the structure of this embodiment is the same as that of the second embodiment, and the difference is that:
still include movable assembly 2, sloping supporting component 5 and sloping slope control unit 6, the top right side of crossbeam 1 passes through movable assembly 2 swing joint sloping 3's lower extreme, and the one end of sloping supporting component 5 is connected to the downside of sloping 3, installs sloping slope control unit 6 on the crossbeam 1, and sloping slope control unit 6 is connected to the other end of sloping supporting component 5.
The oblique beam supporting component 5 comprises a movable seat 51 and a supporting rod 52, the lower side of the oblique beam 3 is fixedly connected with the movable seat 51, and the movable seat 51 is movably connected with the top end of the supporting rod 52. The angle change of the stay 52 can change the degree of support to the diagonal beam 3, thereby changing the angle of inclination of the diagonal beam 3.
The oblique beam inclination control unit 6 comprises a rectangular sliding groove 61, a sliding block 62 and a threaded rod 63, wherein the rectangular sliding groove 61 is formed in the left side of the top of the cross beam 1, the threaded rod 63 is rotatably connected to the inner side of the rectangular sliding groove 61, the sliding block 62 is transversely and slidably connected in the rectangular sliding groove 61, the threaded rod 63 is in threaded connection with a screw hole on the side face of the sliding block 62, and the top of the sliding block 62 is movably connected with the bottom end of the supporting rod 52.
The threaded rod 63 is twisted to extend out of one end of the rectangular sliding groove 61, and due to the threaded action of the threaded rod 63 and the sliding block 62, the sliding block 62 slides in the rectangular sliding groove 61, so that the bottom of the supporting rod 52 is pushed to move, the inclination angle of the oblique beam 3 is changed, the reaction frame can be adjusted, and the application range of the reaction frame can be enlarged.
The oblique beam inclination control unit 6 further comprises fixing bars 64, fixing holes 65 and inserting rods 66, the front side and the rear side of the top of the cross beam 1 are respectively provided with the fixing bars 64, the fixing bars 64 are provided with the fixing holes 65 at equal intervals, and the inserting rods 66 inserted into the fixing holes 65 are inserted into the side faces of the sliding blocks 62.
When the sliding block 62 slides to a required position in the rectangular sliding groove 61, the sliding block 62 is inserted into the fixing hole 65 of the corresponding sliding block 62 through the inserting rod 66 and then is inserted into the sliding block 62, so that the sliding block 62 is fixed, and the position of the sliding block 62 in the rectangular sliding groove 61 is prevented from being influenced by the rotation of the threaded rod 63.
The sloping 3 comprises a sleeve rod 31, a slide rod 32 and a telescopic control component, wherein the middle part of the inner part of the sleeve rod 31 is provided with the bottom end of the slide rod 32 in a sliding manner, the bottom end of the sleeve rod 31 is connected with the movable component 2, the lower side of the top end of the sleeve rod 31 is fixedly connected with the movable seat 51, and the upper sides of the sleeve rod 31 and the slide rod 32 are connected through the telescopic control component.
The sliding rod 32 can be controlled to slide in the sleeve rod 31 through the telescopic control assembly, so that the length of the inclined beam 3 is changed, the size of the reaction frame can be changed, and the application range is improved.
The telescopic control assembly comprises a reinforcing bar 33, a fixing pin 34, a fixing nut 35, a pin hole 36, a mounting block 37, a telescopic control screw 38 and a fixing block 39, wherein the pin hole 36 is formed in the side surface of the sliding bar 32 at equal distance, the fixing block 39 is arranged at the top of the sliding bar 32, the mounting block 37 corresponding to the fixing block 39 is arranged at the top of the sleeve bar 31, a screw hole in the side surface of the mounting block 37 is in threaded connection with the telescopic control screw 38, one end of the telescopic control screw 38 is rotationally connected with the fixing block 39, the fixing pin 34 is inserted into a side surface round hole of the sleeve bar 31, the end part of the fixing pin 34 penetrates through the corresponding pin hole 36 and is in threaded connection with the fixing nut 35, the upper side surface and the lower side surface of the sliding bar 32 are respectively provided with the reinforcing bar 33, the strength of the sliding bar 32 can be improved, the structure strength of the sliding bar 32 is prevented from being reduced due to the fact that the pin hole 36 is formed in the side surface is avoided, the sliding bar 32 can be driven to slide in the sleeve bar 31 due to twisting of the telescopic control screw 38, after the whole length of the inclined bar 3 is adjusted, the sliding bar 32 can be fixed through the fixing nut 35, and the fixing pin 33 is prevented from being separated from the pin hole 36 through the fixing nut 33.
The movable component 2 enables the inclined beam 3 to move relative to the cross beam 1, and simultaneously the inclined beam 3 and the cross beam 1 can be detached, so that the transportation is convenient, the installation is convenient, and the inclined beam supporting component 5 can be driven to move through the inclined beam inclination control unit 6, so that the inclination angle of the inclined beam 3 can be changed as required.
Referring to fig. 4, a pre-pressing device for casting a hanging basket on a cantilever of a viaduct is similar to the third embodiment in structure, and is different from the third embodiment in that:
and further comprises a reinforcing component, and the outer side of the upper end of the loop bar 31 is provided with the reinforcing component. The reinforcing component can prevent the slide bar 32 from damaging the outer side of the port of the sleeve bar 31 due to overlarge force on the port side surface of the sleeve bar 31. The reinforcing component comprises a reinforcing frame 12 and connecting ribs 13, wherein the reinforcing frame 12 is sleeved at the upper end of the sleeve rod 31 at equal intervals, and the reinforcing frames 12 are connected through the connecting ribs 13, so that the strength of the upper end of the sleeve rod 31 is enhanced.
Fifth embodiment, referring to fig. 1, a pre-pressing device for cantilever casting hanging basket of viaduct, the present embodiment is substantially the same as the fourth embodiment in structure, and the difference is that:
and the device also comprises a top support assembly 4, and the top end of the sliding rod 32 is provided with the top support assembly 4. The top support component 4 is convenient to connect with the corresponding position of the hanging basket. The top support assembly 4 comprises a top support block 41 and a clamping groove 42, the upper end of the sliding rod 32 is connected with the top support block 41, and the side surface and the top of the top support block 41 are respectively provided with the clamping groove 42, so that the top support assembly is convenient to be clamped with a corresponding position.
The pre-pressing method of the pre-pressing device of the overhead bridge cantilever pouring hanging basket specifically comprises the following steps:
s1: determining a pre-pressing control beam section, carrying out a basket hanging pre-pressing test according to the heaviest beam section by calculating, analyzing and comparing working conditions of the basket hanging, and carrying out basket hanging pre-pressing work after all components of the basket are installed and a bottom plate is installed;
s2: the settlement observation points are respectively arranged on the rear anchor and the bottom die of the hanging basket, and the total of nine settlement observation points are measured according to the staged loading and unloading, so that the elastic deformation and the inelastic deformation of the main truss and the template of the hanging basket are measured;
s3: the method comprises the steps of installing a pre-pressing device, installing a pre-pressing device of a cantilever casting hanging basket of a viaduct on a box girder web, placing a cross beam 1 of the pre-pressing device of the cantilever casting hanging basket of the viaduct on a front cross beam of a bottom basket, and placing a jack 83 between the front cross beam of the bottom basket and the cross beam 1;
s4: marking, measuring the elevation of each monitoring point by using a level gauge before loading, recording the initial elevation, and then starting to load in a grading manner by using a jack 83;
s5: the loading of the jack 83 is classified into 10%, 50%, 100% and 120%, for 10%, 50% and 100% of three-stage loads, the load is kept for 5-10 minutes when the load is loaded to each stage of load, and the elevation of each monitoring point is measured by a leveling instrument after deformation is stable;
s6: when loaded to 120% of this level load, the load was maintained for 3-5 hours;
s7: unloading the jack 83 oil meter when the height of the monitoring point is unchanged by measuring with a level gauge, and recording data;
s8: and (3) the load is also subjected to grading unloading, 100% -40% -10% -0% of the load is respectively unloaded, the load is kept for 5-10 minutes when the load is unloaded to each grade, and the elevation of each monitoring point is measured by using a level gauge.
According to the classified loading and unloading, the elastic deformation and the inelastic deformation of the hanging basket main truss and the templates are measured, the pre-pressing overload coefficient is 1.2, the loading is classified as 1.2 times of the maximum weight of cantilever pouring, the loading sequence is 0% -10% -50% -100% -120%, the loading test is to achieve the stress state under various working conditions in the complete or basic simulation hanging basket concrete pouring process, the arrival time of each stage is specified, and if the jack oil meter reading is found to fall back, the jack oil meter reading is reloaded to the specified load.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The utility model provides a pre-compaction device of basket is hung in overpass cantilever pouring, includes crossbeam (1) of horizontal setting, the lower extreme of sloping (3) is connected on the top right side of crossbeam (1), the upper end of sloping (3) sets up its characterized in that still includes:
the movable gasket assembly (7) comprises a connecting block (71), a first base plate (72) and a hinged support (73), wherein the connecting block (71) is fixed at the bottom of the left end of the cross beam (1), the connecting block (71) is movably connected with the hinged support (73) through a movable shaft, and the first base plate (72) is connected with the bottom of the hinged support (73);
the prepressing power unit (8) comprises a backing plate II (81), a limiting ring (82), a jack (83), a baffle (84) and a jacking column (85), wherein the backing plate II (81) is arranged below the cross beam (1) corresponding to the lower end position of the oblique beam (3), the limiting ring (82) is arranged on the backing plate II (81), the bottom end of the jack (83) is arranged in the limiting ring (82), the top of the jack (83) is connected with the longitudinal jacking column (85), an arc-shaped groove corresponding to the jacking column (85) is formed in the lower side of the cross beam (1), the baffle (84) is respectively arranged at two sides of the arc-shaped groove at the bottom of the cross beam (1), and a jacking measuring piece is arranged on the backing plate II (81);
the device comprises a movable assembly (2), a diagonal beam supporting assembly (5) and a diagonal beam inclination control unit (6), wherein the right side of the top of the cross beam (1) is movably connected with the lower end of the diagonal beam (3) through the movable assembly (2), the lower side of the diagonal beam (3) is connected with one end of the diagonal beam supporting assembly (5), the diagonal beam inclination control unit (6) is arranged on the cross beam (1), and the other end of the diagonal beam supporting assembly (5) is connected with the diagonal beam inclination control unit (6);
the oblique beam supporting assembly (5) comprises a movable seat (51) and a supporting rod (52), the movable seat (51) is fixedly connected to the lower side of the oblique beam (3), and the movable seat (51) is movably connected with the top end of the supporting rod (52);
the oblique beam inclination control unit (6) comprises a rectangular sliding groove (61), a sliding block (62) and a threaded rod (63), wherein the rectangular sliding groove (61) is formed in the left side of the top of the cross beam (1), the threaded rod (63) is connected to the inner side of the rectangular sliding groove (61) in a rotating mode, the sliding block (62) is connected to the inner side of the rectangular sliding groove (61) in a sliding mode, the threaded rod (63) is in threaded connection with a threaded hole on the side face of the sliding block (62), and the top of the sliding block (62) is movably connected with the bottom end of the supporting rod (52).
2. The pre-pressing device of the viaduct cantilever pouring hanging basket according to claim 1, wherein the oblique beam inclination control unit (6) further comprises fixing strips (64), fixing holes (65) and inserting rods (66), the fixing strips (64) are respectively arranged on the front side and the rear side of the top of the cross beam (1), the fixing holes (65) are formed in the fixing strips (64) at equal intervals, and the inserting rods (66) inserted into the fixing holes (65) are inserted into the side faces of the sliding blocks (62).
3. The pre-pressing device of the viaduct cantilever pouring hanging basket according to claim 2, wherein the inclined beam (3) comprises a sleeve rod (31), a sliding rod (32) and a telescopic control assembly, the middle part of the sleeve rod (31) is arranged, the top end of the sleeve rod is connected with the bottom end of the sliding rod (32) in a sliding manner, the bottom end of the sleeve rod (31) is connected with the movable assembly (2), the lower side of the top end of the sleeve rod (31) is fixedly connected with the movable seat (51), and the upper sides of the sleeve rod (31) and the sliding rod (32) are connected through the telescopic control assembly.
4. A pre-pressing device for a cantilever casting cradle of a viaduct according to claim 3, further comprising a reinforcing component, wherein the reinforcing component is mounted on the outer side of the upper end of the loop bar (31).
5. The pre-pressing device of the viaduct cantilever casting hanging basket according to claim 4, further comprising a top support assembly (4), wherein the top end of the sliding rod (32) is provided with the top support assembly (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387788.2A CN114164771B (en) | 2021-11-22 | 2021-11-22 | Prepressing device and prepressing method for overhead bridge cantilever pouring hanging basket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387788.2A CN114164771B (en) | 2021-11-22 | 2021-11-22 | Prepressing device and prepressing method for overhead bridge cantilever pouring hanging basket |
Publications (2)
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| CN114908683B (en) * | 2022-06-06 | 2023-05-02 | 中铁大桥局集团有限公司 | Cantilever construction bridge support and pre-compaction device of hanging basket |
| TWI856901B (en) * | 2023-12-15 | 2024-09-21 | 佳彧機械工程有限公司 | Cantilever work vehicle load test device and construction method |
| CN118148041B (en) * | 2024-05-10 | 2024-07-19 | 山西建筑工程集团有限公司 | Bridge cantilever box girder hanging basket structure convenient for pre-pressing loading |
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