CN112049456B - Shockproof prestressed cable system for masonry ancient tower cultural relics - Google Patents
Shockproof prestressed cable system for masonry ancient tower cultural relics Download PDFInfo
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- CN112049456B CN112049456B CN202010937157.2A CN202010937157A CN112049456B CN 112049456 B CN112049456 B CN 112049456B CN 202010937157 A CN202010937157 A CN 202010937157A CN 112049456 B CN112049456 B CN 112049456B
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- 238000004873 anchoring Methods 0.000 claims abstract description 40
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 11
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- 239000010959 steel Substances 0.000 claims description 19
- 230000000712 assembly Effects 0.000 claims description 18
- 238000000429 assembly Methods 0.000 claims description 18
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- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920003051 synthetic elastomer Polymers 0.000 claims description 3
- 239000005061 synthetic rubber Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000011241 protective layer Substances 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 239000004575 stone Substances 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
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- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
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- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
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Abstract
A quakeproof prestress cable system of a masonry ancient tower cultural relic and a prestress determining method are provided, wherein the cable system comprises a top fixing assembly, a vertical prestress assembly, a circumferential prestress assembly and an anchoring end assembly; the vertical prestress assembly is arranged between the top fixing assembly and the anchoring end assembly, the annular prestress assembly is horizontally arranged at the elevation of each floor slab of the masonry ancient tower cultural relic, and a bidirectional cable clamp is arranged at the crossed part of the double cables for connection; the bidirectional cable clamp comprises an inner base plate, a middle cover plate and an outer cover plate which are vertically attached from inside to outside in sequence; the vertical cable clamp is arranged in a channel formed by buckling the inner base plate and the middle cover plate, the ring cable clamp is arranged in a channel formed by the middle cover plate and the outer cover plate, and prestress is respectively applied to the double cables. And when the prestress is determined, on the premise of the minimum intervention principle of cultural relic protection, and on the basis of discrete body model push analysis, the earthquake-resistant performance of the brick-stone ancient tower cultural relic is evaluated. The method does not need to open a groove or a hole on the cultural relic body, has strong reversibility and completely retains historical information of the masonry ancient tower cultural relic.
Description
Technical Field
The invention belongs to the field of cultural relic shockproof protection, and particularly relates to a shockproof prestressed cable system of a masonry ancient tower cultural relic, which is suitable for the main body seismic protection of the masonry ancient tower cultural relic which is long in the past and loose day by day.
Background
Masonry ancient tower cultural relic bodies are very fragile when facing earthquake disasters. The earthquake action easily causes the damages such as the collapse of the whole structure of the main body of the masonry ancient tower cultural relic, the local collapse or the pulling and the cracking of the vertical weak zone between each layer of the coupon hole. Once the ancient towers are damaged, the cultural relics stored in the towers are also subjected to huge loss. Therefore, the effective earthquake-proof performance improving device for the development of the main body of the masonry ancient tower cultural relics is an unbearable task.
In the prior art, Indirli adopts a prestressed steel bar device to resist shock for an Italy brick stone clockwork, but on one hand, the device still needs to be directly anchored at the top of the clockwork to influence a cultural relic body; on the other hand, the annular prestressed cable system is not introduced, so that the failure modes of local out-of-plane instability of the structure, tension cracking of the opening and the like cannot be limited. China already carries out research and practice work around the protection of main bodies of masonry ancient towers cultural relics, but the existing reinforcing mode, namely a masonry ancient tower integral anti-seismic reinforcing method (publication number: 104153596B) and a method and a device (publication number: 103541558B) for reinforcing the ancient brick towers by prestressed carbon fiber plate hooping, needs large-scale grooving treatment on parts such as tower body height opening and/or prestressed hooping, and can cause irreversible influence on cultural relic bodies. Therefore, there is a need to develop a shock mount for the main body of masonry pylon cultural relics that conforms to the minimal intervention principles of cultural relics.
Disclosure of Invention
The invention provides a quakeproof prestressed cable system of a masonry ancient tower cultural relic, and aims to provide a device for improving the quakeproof performance of a masonry ancient tower cultural relic main body in a prestressed cable system mode on the premise of a cultural relic protection minimum intervention principle.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a shockproof prestressed cable system of masonry ancient tower historical relic which characterized in that: the device comprises a top fixing assembly, a vertical prestress assembly, a circumferential prestress assembly and an anchoring end assembly; the top fixing component is horizontally covered on the top of the main body of the masonry ancient tower cultural relic, the edge of the top fixing component extends out of the periphery of the main body of the masonry ancient tower cultural relic to form connecting parts, and the connecting parts are uniformly arranged around the main body of the masonry ancient tower cultural relic at intervals; the anchoring end assemblies are arranged on the attachment surface at the bottom of the main body of the masonry ancient tower cultural relic and vertically correspond to the connecting part at the top; the vertical prestress assemblies are arranged between the top fixing assembly and the anchoring end assembly and comprise vertical cables, the vertical cables are vertically arranged at intervals around the masonry ancient cultural relic main body, the upper ends of the vertical cables are fixedly connected with the connecting parts, and the lower ends of the vertical cables are fixedly connected with the anchoring end assembly; the annular prestress component is horizontally arranged at the elevation of each floor slab of the main body of the masonry ancient tower cultural relic and comprises an annular cable, and the annular cable is hooped on the outer side wall surface of the main body of the masonry ancient tower cultural relic and is connected with a bidirectional cable clamp arranged at the crossing part of the vertical cable; vertical prestress and annular prestress are respectively applied to the vertical cables and the annular cables.
According to the preferred technical scheme, the bidirectional cable clamp comprises a cable clamp inner base plate, a cable clamp middle cover plate and a cable clamp outer cover plate which are vertically attached from inside to outside in sequence, wherein the cable clamp inner base plate, the cable clamp middle cover plate and the cable clamp outer cover plate are all arc-shaped plates; the cable clamp inner backing plate is tightly attached to the masonry ancient tower cultural relic main body; the vertical cable clamp is arranged in a longitudinal arc-shaped channel formed by buckling the cable clamp inner base plate and the cable clamp middle cover plate, and the annular cable clamp is arranged in a horizontal arc-shaped channel formed by buckling the cable clamp middle cover plate and the cable clamp outer cover plate; the interface sliding friction coefficient of the ring cable or the vertical cable and the bidirectional cable clamp is not more than 0.3; after the vertical cable and the ring cable are in place, the cable clamp inner base plate, the cable clamp middle cover plate and the cable clamp outer cover plate are connected through a plurality of single-side bolts which are arranged in a penetrating mode from inside to outside.
Further preferably, the top fixing assembly comprises a ring plate and a top beam; the top beam is a linear, cross or cross-shaped radiation steel beam structure and is formed by welding and/or bolting and/or casting segmented steel beams; the bottom of the outer end part of the steel beam extending out of the main body of the masonry ancient tower cultural relic is welded with a top beam lug plate to form a connecting part; the ring plate is arranged around the top surface edge of the masonry ancient tower cultural relic main body, the top of the ring plate is fixedly welded with the top beam, and the bottom of the ring plate is provided with a clamping groove which is fixedly connected with the top edge of the masonry ancient tower cultural relic main body in a clamping manner.
Further preferably, the ring plate is an integral closed ring plate, or a closed ring plate formed by sequentially connecting a plurality of plates from head to head; the ring plate is horizontally arranged at the top of the outer wall of the masonry ancient tower cultural relic main body, the inner diameter and the outer diameter of the ring plate are respectively matched with the inner diameter and the outer diameter of the outer wall, and the clamping plates can be respectively arranged on two sides of the outer wall.
Preferably, the top beam is an i-shaped steel beam or a box-shaped steel beam, and the top beam ear plate is vertically welded on the lower flange plate of the top beam; and stiffening ribs are arranged between the upper flange plate and the lower flange plate of the top beam at the arrangement positions of the top beam ear plates.
Preferably, the vertical prestress assembly comprises a vertical cable, an upper vertical cable lug plate, a lower vertical cable lug plate, an upper vertical cable pin shaft and a lower vertical cable pin shaft; the upper end of the vertical cable is connected with the top beam ear plate through a vertical cable upper ear plate and a vertical cable upper pin shaft; the lower end of the vertical cable is connected with an anchoring end ear plate pin shaft of the anchoring end assembly through a vertical cable lower ear plate and a vertical cable lower pin shaft, and the distance between the vertical cable and the outer wall surface of the masonry ancient tower cultural relic main body is 10-200 mm.
Preferably, the ring cables of the annular prestress assembly are double cables, ring cable ear plates are arranged at the head end and the tail end of each cable respectively, and the two opposite ring cable ear plates are connected with two end pin shafts of the ear plate drawknot piece through ring cable pin shafts respectively; the distance between the ring cable and the outer wall surface of the main body of the masonry ancient tower cultural relic is 20 mm-100 mm.
Further preferably, the anchoring end assembly comprises an anchoring plate, an anchoring end ear plate and an anchor bar; the anchor plate is horizontally arranged on the attachment surface, and the anchoring end lug plate is vertically arranged on the anchor plate and is hinged with the lower lug plate plane of the vertical cable at the lower end of the vertical cable.
Further preferably, the horizontal section of the masonry ancient tower cultural relic main body is polygonal or circular; when the ring plate is polygonal, the ring plate is also correspondingly polygonal, the number of the vertical prestress assemblies is equal to the number of the horizontal section edges of the masonry ancient cultural relic main body, the vertical prestress assemblies are respectively arranged at the side edge of the masonry ancient cultural relic main body, the bidirectional cable clamp is arranged on the side edge, and the inner side surface of the inner backing plate of the cable clamp is correspondingly provided with a folded edge; when the circular prestressed concrete column is circular, the annular plate is a circular annular plate, the number of the vertical prestressed components is an even number not less than 8, and the vertical prestressed concrete column is uniformly arranged along the circular structure at intervals.
More preferably, an interface agent is coated on the outer surface of the contact part of the masonry ancient tower cultural relic main body and the top fixing piece and the circumferential prestress assembly; the vertical cables and the ring cables are high-strength steel cables with zinc-5% aluminum-rare earth alloy coating or steel cables with polyethylene protective layers; the contact surfaces of the cable clamp inner backing plate, the cable clamp middle cover plate and the cable clamp outer cover plate and the ring cable or the vertical cable are made of polytetrafluoroethylene or alumina ceramic materials, and the contact surfaces of the cable clamp inner backing plate and the masonry ancient tower cultural relic main body are made of synthetic rubber materials.
Compared with the prior art, the invention has the following remarkable beneficial effects:
1. the quakeproof prestress cable system of the masonry ancient tower cultural relic is novel in structural design, simple in structure and convenient to construct, provides a quakeproof prestress cable system of the masonry ancient tower cultural relic for cultural relic protection planning designers, does not need to open a groove or a hole on a cultural relic body, is strong in reversibility, and can more completely keep the historical information of a masonry ancient tower cultural relic main body.
2. The anti-seismic device provided by the invention is characterized in that a set of prestress bearing capacity system is formed by key components such as the top fixing component, the vertical prestress component, the annular prestress component and the anchoring end component, the overall anti-seismic performance of the main body of the masonry ancient tower cultural relic is improved, and meanwhile, the vertical through cracks formed among all layers of the coupon holes can be effectively slowed down.
3. The bidirectional cable clamp is suitable for prestress tensioning construction, and the operability and convenience of tensioning operation are guaranteed while the vertical cable and the ring cable are accurately positioned and fixed.
Drawings
FIG. 1 is a schematic view of the overall construction of the seismic prestressed cable system of a masonry ancient tower relic to which the present invention relates;
FIG. 2 is a schematic structural view of a top mount assembly according to the present invention;
FIG. 3 is a schematic structural view of a vertical prestressing assembly according to the present invention;
FIG. 4 is a schematic structural view of a hoop prestressing assembly according to the present invention;
FIG. 5 is a schematic top view of the connection between the vertical pre-stressing assembly and the hoop pre-stressing assembly according to the present invention;
FIG. 6 is a partial isometric view (view one) of the connection of the vertical pre-stressing assembly and the circumferential pre-stressing assembly according to the present invention;
FIG. 7 is a partial isometric view (view II) of the connection of the vertical pre-stressing assembly and the circumferential pre-stressing assembly according to the present invention;
FIG. 8 is a schematic view of the attachment of the looped cable, looped cable lug, lug tie and looped cable pin according to the present invention;
fig. 9 is a schematic structural view of an anchoring end assembly according to the present invention.
Reference numerals: 1-a masonry ancient tower cultural relic main body; 2-a top fixing assembly; 3-vertical prestressing assembly; 4-a hoop pre-stress assembly; 5-an anchoring end assembly; 21-ring plate; 22-a clamping plate; 23-a top beam; 24-top beam ear panels; 25-a stiffener; 31-a vertical cable; 32-vertical cable upper ear plate; 33-vertical cable lower ear plate; 34-a pin shaft is arranged on the vertical cable; 35-vertical cable lower pin shaft; 41-inner backing plate of cable clamp; 42-looped cable; 43-cable clamp middle cover plate; 44-cable clamp outer cover plate; 45-single-sided bolt; 46-a looped cable ear plate; 47-ear plate pull ties; 48-ring cable pin shaft; 49-a second ring cable ear plate; 410-a second ring cable pin shaft; 51-an anchor plate; 52-anchoring end ear plates; 53-anchor bar.
Detailed Description
The invention discloses a quakeproof prestressed cable system of a masonry ancient tower relic, which is described in detail by combining specific embodiments and accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1, the quakeproof prestressed cable system of masonry ancient tower cultural relics comprises a top fixing component 2, a vertical prestressed component 3, a circumferential prestressed component 4 and an anchoring end component 5, and is characterized in that: the bottom of the top fixing component 2 is of a clamping groove structure and is fixedly connected with the top of the main body of the masonry ancient tower cultural relic in a clamping manner. The upper end of the vertical prestress assembly 3 is hinged to the plane of the top fixing assembly 2, and after vertical prestress is applied, the lower end of the vertical prestress assembly 3 is hinged to the plane of the anchoring end assembly 5. The hoop prestressing force subassembly 4 is located each floor place elevation of masonry ancient tower historical relic main part, adopts bolted connection with vertical prestressing force subassembly 3, after applying the hoop prestressing force, connects position and the chucking of masonry ancient tower historical relic main part body. The anchoring end component 5 is positioned on the ground near the bottom of the main body of the masonry ancient tower cultural relic, and the lower end of the corresponding vertical pre-stress component 3 is anchored on the ground.
As shown in fig. 2, the top fixing assembly 2 of the seismic prestressed cable system for masonry ancient tower relics comprises a ring plate 21, a clamping plate 22, a top beam 23, a top beam ear plate 24 and a stiffening rib 25. The ring plates 21 are characterized in that when the horizontal section of the masonry ancient tower cultural relic main body 1 is a polygonal ring, the number of the ring plates 21 is equal to the number of the side lengths of the horizontal section of the masonry ancient tower cultural relic main body 1, each ring plate 21 is respectively attached to each side of the top of the wall body, and the ring plates 21 are sequentially and firmly connected end to end; when the horizontal section of the main body 1 of the masonry ancient tower cultural relic is a circular ring, the number of the ring plates 21 is selected to be an integer not less than 8, one horizontal arc edge of each ring plate 21 coincides with the excircle of the circular ring, the other horizontal arc edge coincides with the inner circle of the circular ring, and the ring plates 21 are sequentially and firmly connected end to end. Cardboard 22 characterized by, set up one in every ring plate 21 center department tiling stone ancient tower historical relic main part inboard, set up one in every ring plate 21 center department tiling stone ancient tower historical relic main part outside, cardboard 22 firmly connects into U type draw-in groove with ring plate 21. The top beam 23 is characterized in that the cross section is I-shaped or box-shaped and is firmly connected with the ring plate 21, the top beam 23 extends out of the masonry ancient tower cultural relic main body 1 from the connection part, the length of the extending section is equal to the height of the cross section of the top beam 23, and each top beam 23 is welded and/or bolted and/or cast to form a whole. The top beam ear plate 24 is characterized in that the top beam ear plate is firmly connected with the lower surface of the overhanging section of the top beam 23, and the plane of the top beam ear plate is parallel to the cross section of the top beam 23 connected with the top beam ear plate. The stiffening rib 25 is characterized in that the stiffening rib is firmly connected with the top beam 23 and is arranged in the same plane with the top beam ear plate 24 of the top beam 23 connected with the stiffening rib.
As shown in fig. 3, the vertical prestress assembly 3 of the seismic prestress cable system of the masonry ancient tower relic comprises a vertical cable 31, a vertical cable upper lug plate 32, a vertical cable lower lug plate 33, a vertical cable upper pin shaft 34 and a vertical cable lower pin shaft 35. When the horizontal section of the masonry ancient tower cultural relic main body 1 is a polygonal ring, the number of the sets of the vertical prestress assemblies 3 is equal to the number of the side lengths of the horizontal section of the masonry ancient tower cultural relic main body 1; when the horizontal section of the masonry ancient tower cultural relic main body 1 is a circular ring, the number of the vertical prestress assemblies 3 is equal to an even number which is not less than 8. The uppermost end and the lowermost end of each set of vertical prestress component 3 are connected with the edge of the side surface of the tower body of the adjacent masonry ancient tower cultural relic main body 1 in the same plane. The vertical cable 31 is characterized in that the starting point is firmly connected with the upper ear plate 32 of the vertical cable, and the finishing point is firmly connected with the lower ear plate 33 of the vertical cable. The upper lug plate 32 hole of the vertical cable is aligned with the upper lug plate 24 hole of the top beam in the top fixing component 2, and then the upper pin shaft 34 of the vertical cable is inserted.
Referring to fig. 4-8, the hoop prestressed assembly 4 of the shockproof prestressed cable system for masonry ancient tower relics comprises a cable clamp inner backing plate 41, a ring cable 42, a cable clamp middle cover plate 43, a cable clamp outer cover plate 44, a single-side bolt 45, a ring cable lug plate 46, a lug plate tie piece 47, a ring cable pin shaft 48, a ring cable lug plate II 49 and a ring cable lug plate II 410. The cable clip inner backing plate 41 is characterized by being tightly attached to the main body of the masonry ancient tower cultural relic. At the joint of the ring cable 42 and the vertical cable 31, a cable clamp middle cover plate 43 is arranged between the ring cable 42 and the vertical cable 31, and the sliding friction coefficient of the interface contacting with the ring cable 42 or the vertical cable 31 is 0.3. The cable clamp inner backing plate 41, the cable clamp middle cover plate 43 and the cable clamp outer cover plate 44 in each set of the annular prestress assemblies 4 are located at the same elevation position, and the number of the cable clamp inner backing plate, the number of the cable clamp middle cover plate and the number of the cable clamp outer cover plate are equal and equal to the number of the sets of the vertical prestress assemblies 3. The single-side bolt 45 firmly connects the cable clamp inner backing plate 41, the cable clamp middle cover plate 43 and the cable clamp outer cover plate 44. The ring cable ear plate 46 is characterized in that the ring cable ear plate is positioned at two ends of the ring cable 42 and is firmly connected with the ring cable 42. After the ring cable 42 is stretched by 100%, aligning a hole of a ring cable ear plate 46 at one end of the ring cable 42 with a hole of an ear plate pulling piece 47, and inserting a ring cable pin shaft 48; and aligning the hole of the second ring cable lug plate 49 at the other end of the ring cable 42 with the hole of the other hole of the same lug plate pulling piece 47, and inserting the second ring cable pin shaft 410. In this embodiment, each group of hoop prestressing assemblies adopts two hoop cables.
As shown in fig. 9, the anchorage end assembly 5 of the seismic prestressed cable system for masonry ancient tower relics comprises an anchor plate 51, an anchorage end lug plate 52 and an anchor bar 53. The number of sets of anchoring end assemblies 5 is equal to the number of sets of vertical prestressing assemblies 3. The anchor plate 51 is characterized in that the upper surface is provided with an anchoring end ear plate 52, and the lower surface is provided with an anchor rib 53. The anchoring end ear plate 52 is hinged to the vertical prestress assembly 3 in a plane, after the vertical cable 31 is stretched by 100%, the hole of the anchoring end ear plate 52 is aligned to the hole of the lower ear plate 33 of the vertical cable, and the lower pin shaft 35 of the vertical cable is inserted. The anchor bars 53 anchor the anchor plate 51 to the ground.
Before installing the quakeproof prestressed cable system of the masonry ancient tower cultural relic, an interfacial agent is coated on the outer surface of the masonry ancient tower cultural relic body 1, which is contacted with the top fixing piece 2 and the annular prestressed component 4. During the prestressed tensioning construction, the cable clamp inner backing plate 41 and the ring cable 42 are laid layer by layer from top to bottom or from bottom to top, and after the ring cable 42 is tensioned by 100%, all cable clamp middle cover plates 43 are positioned and the vertical cables 31 are tensioned. When the vertical cables 31 are tensioned, a centrosymmetric tensioning method is adopted, namely any two vertical cables 31 which are centrosymmetric about the centroid of the cross section of the main tower body of the masonry ancient tower cultural relic are synchronously tensioned. And after all the vertical cables 31 are tensioned by 100%, positioning the cable clamp outer cover plate 44 and screwing the single-side bolt 45, and finishing the prestress tensioning construction process.
The second embodiment is as follows:
as shown in fig. 1, the earthquake-proof performance improving apparatus of the masonry pylon cultural relic main body 1 in the present embodiment comprises a top fixing component 2, a vertical pre-stressing component 3, a circumferential pre-stressing component 4 and an anchoring end component 5. The masonry ancient tower cultural relic main body 1 is a three-layer hollow ancient tower, the cross section is a regular hexagon, and the top wall thickness is 400 mm. The bottom of the top fixing component 2 is of a clamping groove structure and is fixedly connected with the top of the main body 1 of the masonry ancient tower cultural relic. The number of the vertical prestress assemblies 3 is 6, the upper end of each vertical prestress assembly is hinged to the plane of the top fixing assembly 2, and after vertical prestress is applied, the lower end of each vertical prestress assembly is hinged to the plane of the anchoring end assembly 5. The hoop prestressing force subassembly 4 is located 1 each floor place scale height of masonry ancient tower historical relic main part, adopts bolted connection with vertical prestressing force subassembly 3, after applying the hoop prestressing force, connects position and the chucking of 1 body of masonry ancient tower historical relic main part. 6 sets totally of anchor end subassembly 5 are located near 1 body bottom ground department of masonry ancient tower historical relic main part, with 3 lower extreme anchors in ground of vertical prestressing force subassembly that correspond.
As shown in figure 2, the top fixing component 2 of the quakeproof prestressed cable system of the masonry ancient tower cultural relic comprises a ring plate 21, a clamping plate 22, a top beam 23, a top beam ear plate 24 and a stiffening rib 25, and low-alloy steel with yield strength not less than 355MPa is adopted. The ring plate 21 totally has 6 blocks, the thickness is 16mm, each ring plate 21 is respectively attached to each side of the top of the masonry ancient tower, and the ring plates are sequentially and firmly connected end to end. Cardboard 22 set up one in every 21 centers of ring boards tiling stone ancient tower historical relic main part inboards, set up one in every ring board center department tiling stone ancient tower historical relic main part outside, thickness is 16 mm. The clamping plate 22 and the ring plate 21 are firmly connected to form a U-shaped clamping groove. The cross section of the top beam 23 is made of I-shaped steel, the width of a flange is 400mm, the thickness of the flange is 25mm, the height of a web plate is 400mm, the thickness of the web plate is 10mm, and the length of the end part of the top beam extending out of the tower body is 450 mm. The top beams 23 are welded with the ring plate 21, and the joint areas where the top beams 23 meet are cast to form a whole. The top beam ear plate 24 is firmly connected with the lower surface of the overhanging section of the top beam 23, and the plane is parallel to the cross section of the top beam 23 connected with the top beam ear plate. The thickness of the top beam ear plate 24 is 30mm, and the aperture of the ear plate is 51 mm. The thickness of the stiffening rib 25 is 10mm, the stiffening rib is welded with the top beam and is arranged in the same plane with the top beam ear plate 24.
As shown in fig. 3, the vertical prestressed component 3 of the quakeproof prestressed cable system for the masonry ancient tower relic comprises a vertical cable 31, an upper vertical cable lug plate 32, a lower vertical cable lug plate 33, an upper vertical cable pin shaft 34 and a lower vertical cable pin shaft 35, and the vertical cable and the lower vertical cable are made of low alloy steel with yield strength not less than 355 MPa. The vertical cable 31 adopts a zinc-5% aluminum-rare earth alloy coating high-strength steel cable with the nominal diameter of 20mm, the starting point is firmly connected with the upper ear plate 32 of the vertical cable, and the end point is firmly connected with the lower ear plate 33 of the vertical cable. The diameter of the upper ear plate 32 of the vertical cable is 51mm, and the hole position is aligned with the hole position of the upper ear plate 34 of the top beam in the top fixing component 2 and then the upper pin shaft 34 of the vertical cable with the diameter of 50mm is inserted. The lower ear plate 33 of the vertical cable is hinged with the plane of the anchoring end component 5.
As shown in fig. 4-8, the hoop prestress assembly 4 of the shockproof prestress cable system of the masonry ancient tower relic comprises a cable clamp inner backing plate 41, a ring cable 42, a cable clamp middle cover plate 43, a cable clamp outer cover plate 44, a single-side bolt 45, a ring cable lug plate 46, a lug plate tie piece 47, a ring cable pin shaft 48, a ring cable lug plate II 49 and a ring cable pin shaft II 410. The ring cable is a zinc-5% aluminum-rare earth alloy coated high-strength steel cable with the diameter of 16 mm. The cable clamp inner backing plate 41 is tightly attached to the masonry ancient tower cultural relic main body 1, the attaching surface is made of synthetic rubber with the thickness of 50mm, the number of the cable clamp inner backing plates is equal to 6, and the cable clamp inner backing plates 41 are located on the same horizontal plane. At the joint of the ring cable 42 and the vertical cable 31, a cable clamp middle cover plate 43 is arranged between the ring cable 42 and the vertical cable 31, the surfaces of a cable clamp inner backing plate 41, the cable clamp middle cover plate 43 and a cable clamp outer cover plate 44 which are in contact with the ring cable 42 or the vertical cable 31 adopt 10mm of polytetrafluoroethylene, and the friction coefficient is controlled to be 0.3. The single-side bolts 45 are 10mm in diameter, and firmly connect the cable clamp inner backing plate 41, the cable clamp middle cover plate 43 and the cable clamp outer cover plate 44. Except the part contacted with the main body of the masonry ancient tower cultural relic, the vertical cable or the ring cable, the other parts of the cable clamp inner backing plate, the cable clamp middle cover plate and the cable clamp outer cover plate are all made of low alloy steel with yield strength not less than 355 MPa. The diameter of the aperture of the ring cable ear plate 46, the ear plate drawknot piece 47 and the aperture of the ring cable ear plate II 49 are 31mm, and the diameter of the ring cable pin shaft 48 and the diameter of the ring cable pin shaft II 410 are 30 mm. The ring cable ear plates 46 are positioned at both ends of the ring cable 42 and are firmly connected with the ring cable 42. After the ring cable 42 is stretched by 100%, a hole of a ring cable ear plate 46 at one end of the ring cable 42 is aligned with a hole of an ear plate pulling piece 47, a ring cable pin shaft 48 is inserted, a hole of a ring cable ear plate II 49 at the other end of the ring cable 42 is aligned with another hole of the ear plate pulling piece 47, and a ring cable pin shaft II 410 is inserted. The ring cable ear plate 46, the ring cable pin shaft 48, the ring cable ear plate II 49 and the ring cable pin shaft II 410 are all made of low-alloy steel with yield strength not less than 355 MPa.
As shown in fig. 9, the anchoring end assembly 5 of the quakeproof prestressed cable system for masonry ancient relics comprises an anchor plate 51, an anchoring end lug plate 52 and an anchor bar 53, wherein the anchor plate and the anchoring end lug plate are made of low alloy steel with yield strength not less than 355MPa, and the anchor bar is made of ribbed steel with yield strength not less than 400 MPa. The anchor plate 51 thickness be 30mm, the upper surface is provided with anchor end otic placode 52, the lower surface is provided with four anchor bars 53, the anchor bar nominal diameter is 20 mm. The anchoring end ear plate 52 is hinged with the vertical prestress assembly 3 plane, and the aperture of the anchoring end ear plate is 51 mm. The anchor bars 53 anchor the anchor plate 51 to the ground or the ground beam.
Before installing the shockproof prestressed cable system of a masonry ancient tower relic, B72 acrylic resin interface agent is coated on the outer surface of the masonry ancient tower relic body, which is contacted with the top fixing piece and the annular prestressed component. During prestress tensioning construction, the cable clamp inner backing plates 41 are arranged layer by layer from top to bottom, the ring cables 42 are tensioned layer by layer, and after all the ring cables are tensioned by 100%, all the cable clamp middle cover plates 43 are positioned and all the 6 vertical cables 31 are tensioned synchronously. And after all the vertical cables are tensioned by 100%, positioning the cable clamp outer cover plate 44 and screwing the single-side bolt 45, and finishing the prestress tensioning construction process.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. For example, in the embodiment, the top fixing assembly is constructed by a top beam, a ring plate and the like, and can also be other top fixing assemblies which are suitable for the shape and the manufacture of the main body of the masonry ancient tower cultural relic and have good integrity; the vertical cable in this embodiment is more far away from the main body tower body of the masonry ancient tower historical relic for the ring cable, and the ring cable can also be adopted according to the requirement for the structure of more keeping away from the main body tower body of the masonry ancient tower historical relic for the vertical cable.
Claims (9)
1. The utility model provides a shockproof prestressed cable system of masonry ancient tower historical relic which characterized in that: the device comprises a top fixing component (2), a vertical prestress component (3), a circumferential prestress component (4) and an anchoring end component (5);
the top fixing component (2) is horizontally covered on the top of the masonry ancient tower cultural relic main body (1), the edge of the top fixing component extends out of the periphery of the masonry ancient tower cultural relic main body (1) to form connecting parts, and the connecting parts are uniformly arranged around the masonry ancient tower cultural relic main body (1) at intervals;
the anchoring end assemblies (5) are arranged on the attachment surface at the bottom of the masonry ancient cultural relic main body (1) and vertically correspond to the connecting part at the top;
the vertical prestress assembly (3) is arranged between the top fixing assembly (2) and the anchoring end assembly (5) and comprises vertical cables (31), the vertical cables (31) are vertically arranged around the masonry ancient tower cultural relic main body (1) at intervals, the upper ends of the vertical cables are fixedly connected with the connecting part, and the lower ends of the vertical cables are fixedly connected with the anchoring end assembly (5);
the annular prestress component (4) is horizontally arranged at the elevation of each floor slab of the masonry ancient tower cultural relic main body (1) and comprises an annular cable (42), the annular cable (42) is hooped on the outer side wall surface of the masonry ancient tower cultural relic main body (1), and a bidirectional cable clamp is arranged at the crossing part of the annular cable (42) and the vertical cable (31) for connection; the bidirectional cable clamp comprises a cable clamp inner base plate (41), a cable clamp middle cover plate (43) and a cable clamp outer cover plate (44) which are vertically attached from inside to outside in sequence, and the cable clamp inner base plate, the cable clamp middle cover plate and the cable clamp outer cover plate are arc-shaped plates; the contact surface of the cable clamp inner backing plate (41) and the masonry ancient tower cultural relic main body (1) is made of synthetic rubber material;
vertical prestress and annular prestress are respectively applied to the vertical cable (31) and the annular cable (42).
2. The shockproof prestressed cable system of masonry ancient tower relic according to claim 1, characterized in that:
the cable clamp inner backing plate (41) is tightly attached to the masonry ancient tower cultural relic main body (1);
the ring cable (42) is clamped in a longitudinal arc-shaped channel formed by buckling a cable clamp inner base plate (41) and a cable clamp middle cover plate (43), and the vertical cable (31) is clamped in a horizontal arc-shaped channel formed by buckling the cable clamp middle cover plate (43) and a cable clamp outer cover plate (44); the interface sliding friction coefficient of the annular cable (42) or the vertical cable (31) and the bidirectional cable clamp is not more than 0.3;
after the vertical cable (31) and the ring cable (42) are in place, the cable clamp inner base plate (41), the cable clamp middle cover plate (43) and the cable clamp outer cover plate (44) are connected through a plurality of single-side bolts (45) arranged from outside to inside in a penetrating mode.
3. The shockproof prestressed cable system of masonry ancient tower relic according to claim 1, characterized in that: the top fixing assembly (2) comprises a ring plate (21) and a top beam (23); the top beam (23) is of a linear, cross or cross-shaped radiation steel beam structure and is formed by welding and/or bolt connection and/or casting of sectional steel beams; the bottom of the outer end part of the steel beam extending out of the masonry ancient tower cultural relic main body (1) is welded with a top beam lug plate (24) to form a connecting part; the ring plate (21) is arranged around the top surface edge of the masonry ancient tower cultural relic main body (1), the top of the ring plate is fixedly welded with the top beam (23), and the bottom of the ring plate is provided with a clamping plate (22) to form a clamping groove which is fixedly connected with the top edge of the masonry ancient tower cultural relic main body (1).
4. The shockproof prestressed cable system of masonry ancient tower relic according to claim 3, characterized in that: the ring plate (21) is an integral closed ring plate or a closed ring plate formed by sequentially connecting a plurality of plates from head to head; the ring plate (21) is horizontally arranged at the top of the outer wall of the masonry ancient tower cultural relic main body (1), the inner diameter and the outer diameter of the ring plate are respectively matched with the inner diameter and the outer diameter of the outer wall, and the clamping plates (22) are respectively arranged on two sides of the outer wall.
5. The shockproof prestressed cable system of masonry ancient tower relic according to claim 3, characterized in that: the top beam (23) is an I-shaped steel beam or a box-shaped steel beam, and the top beam ear plate (24) is vertically welded on the lower flange plate of the top beam (23); and a stiffening rib (25) is arranged between the upper and lower flange plates of the top beam at the arrangement position of the top beam ear plate (24).
6. The shockproof prestressed cable system of masonry ancient tower relic according to claim 3, characterized in that: the anchoring end assembly (5) comprises an anchor plate (51), an anchoring end lug plate (52) and an anchor bar (53); the anchor plate (51) is horizontally arranged on the attachment surface, and the anchoring end ear plate (52) is vertically arranged on the anchor plate (51) and is hinged with the plane of the lower ear plate (33) of the vertical cable at the lower end of the vertical cable (31); the vertical prestress assembly (3) comprises a vertical cable (31), a vertical cable upper lug plate (32), a vertical cable lower lug plate (33), a vertical cable upper pin shaft (34) and a vertical cable lower pin shaft (35); the upper end of the vertical cable (31) is connected with the top beam ear plate (24) through a vertical cable upper ear plate (32) and a vertical cable upper pin shaft (34); the lower end of the vertical cable (31) is in pin connection with an anchoring end lug plate (52) of the anchoring end component (5) through a vertical cable lower lug plate (33) and a vertical cable lower pin shaft (35); the distance between the vertical cable (31) and the outer wall surface of the masonry ancient tower cultural relic main body (1) is 10 mm-200 mm.
7. The shockproof prestressed cable system of masonry ancient tower relic according to claim 1, characterized in that: the ring cables (42) of the annular prestress assembly (4) are double cables, the head end and the tail end of each cable are respectively provided with a ring cable lug plate (46), and the two opposite ring cable lug plates (46) are respectively connected with two end pin shafts of a lug plate drawknot piece (47) through ring cable pin shafts (48); the distance between the ring cable (42) and the outer wall surface of the masonry ancient tower cultural relic main body (1) is 20 mm-100 mm.
8. The shockproof prestressed cable system of masonry ancient tower relic according to claim 3, characterized in that: the horizontal section of the masonry ancient tower cultural relic main body (1) is polygonal or circular; when the ring plate (21) is polygonal, the ring plate is correspondingly polygonal, the number of the vertical prestress assemblies (3) is equal to the number of the horizontal section edges of the masonry ancient tower cultural relic main body (1), the vertical prestress assemblies are respectively arranged at the side edge of the masonry ancient tower cultural relic main body, the bidirectional cable clamp is arranged on the side edge, and the inner side surface of the cable clamp inner base plate (41) is correspondingly provided with a folded edge; when the vertical prestress assembly is circular, the ring plate (21) is a circular ring plate, the number of the vertical prestress assemblies (3) is an even number not less than 8, and the vertical prestress assemblies are uniformly arranged along the circular structure at intervals.
9. The shockproof prestressed cable system of masonry ancient tower relic according to claim 1, characterized in that: the interface agent is coated on the outer surface of the contact part of the masonry ancient tower cultural relic main body (1) and the top fixing component (2) and the annular prestress component (4); the vertical cables and the ring cables are high-strength steel cables with zinc-5% aluminum-rare earth alloy coating or steel cables with polyethylene protective layers; the contact surfaces of the cable clamp inner backing plate (41), the cable clamp middle cover plate (43) and the cable clamp outer cover plate (44) and the ring cable (42) or the vertical cable (31) are made of polytetrafluoroethylene or alumina ceramic materials.
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| US20040020158A1 (en) * | 2002-08-02 | 2004-02-05 | Kopshever Michael J. | Tower apparatus |
| US20040123553A1 (en) * | 2002-12-18 | 2004-07-01 | Vertical Solutions, Inc. | Method of reinforcing a tower |
| CN201121366Y (en) * | 2007-10-31 | 2008-09-24 | 北京市建筑设计研究院 | Universal rotating cord clip device with steel structure |
| CN102121316B (en) * | 2011-01-12 | 2012-12-12 | 北京交通大学 | Construction method for reinforcing circular structures by pre-tensioned high-strength fiber cloth |
| CN203905527U (en) * | 2014-06-06 | 2014-10-29 | 国家电网公司 | Reinforcing device for weak transmission tower |
| CN110700675A (en) * | 2019-10-24 | 2020-01-17 | 安徽汀阳电力设备有限公司 | Iron tower is with repairing reinforcing apparatus |
| CN110700678A (en) * | 2019-10-28 | 2020-01-17 | 同济大学建筑设计研究院(集团)有限公司 | Multidirectional prestress cylindrical orthogonal laminated wood structure wind power generation tower |
| CN110725410A (en) * | 2019-10-28 | 2020-01-24 | 北京工业大学 | Cable membrane structure with large curvature and synergistic effect of cable membrane |
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