CN110735478B - Assembled concrete truss building structure - Google Patents

Assembled concrete truss building structure Download PDF

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Publication number
CN110735478B
CN110735478B CN201911031737.9A CN201911031737A CN110735478B CN 110735478 B CN110735478 B CN 110735478B CN 201911031737 A CN201911031737 A CN 201911031737A CN 110735478 B CN110735478 B CN 110735478B
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supporting
plate
building
pressure
groups
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CN110735478A (en
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石栋
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Yancheng Institute of Technology
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Yancheng Institute of Technology
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/02Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements
    • E04B1/04Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements the elements consisting of concrete, e.g. reinforced concrete, or other stone-like material
    • E04B1/043Connections specially adapted therefor

Abstract

The invention discloses an assembled concrete truss building structure which comprises concrete precast slabs arranged between building bodies, wherein a truss reinforcing structure is arranged right below the joint of the concrete precast slabs and the building bodies, the truss reinforcing structure is sequentially provided with a partial pressure supporting mechanism, a supporting main board, a supporting structure and a pressure-bearing side plate positioned at the inner end of the supporting structure from top to bottom, the partial pressure supporting mechanism comprises a plurality of groups of anchor rods prefabricated at the bottoms of the concrete precast slabs, partial pressure supporting frames are fixed at the bottoms of every four groups of anchor rods, penetrating grooves are formed in the middle of the partial pressure supporting frames, longitudinal slabs are inserted among the penetrating grooves, and transverse slabs are arranged right below the longitudinal slabs. The concrete truss structure for supporting the buildings and the suspended parts outside the buildings adopts an assembly structure for effectively dispersing the pressure of a supporting object, uniformly disperses the applied pressure at each position of the lower supporting main board, and effectively improves the stability of the connecting part by matching with a plurality of groups of triangular structures.

Description

Assembled concrete truss building structure
Technical Field
The invention relates to the technical field of building structures, in particular to an assembly type concrete truss building structure.
Background
The reinforced concrete truss is made of reinforced concrete or prestressed concrete. The reinforced concrete truss is mostly used for roof trusses and towers, and is sometimes used for trestles and crane beams. The pull rod of the reinforced concrete truss is usually cracked under the use load, so that the reinforced concrete truss is only used for the truss with light load and small span. After the 50 s, with the development of prestressed concrete technology, prestressed concrete trusses have been commonly used in china for trusses with large span and heavy load, the span is usually 18, 24 and 30 meters, and the span is 60 meters respectively, for some suspended building structures installed on the periphery of building houses, for example: the small-sized bridge which is built in a suspended mode between buildings needs to be installed and fixed through a special concrete truss structure in the installation process, and strength is improved.
However, the existing concrete truss structure for supporting the suspended building structure has the following problems: (1) the structure is simple, the concrete slab and the steel bar structure are generally fixedly installed, and the bearing capacity of the concrete slab and the steel bar structure is small; (2) when pressure at a certain position of the surface of the suspended building body is large, the surface of the suspended building body at the position is easy to cause structural damage, and potential safety hazards are generated. For this reason, a corresponding technical scheme needs to be designed to solve the existing technical problems.
Disclosure of Invention
The invention aims to provide an assembly type concrete truss building structure, which solves the problems in the background art and meets the actual use requirements.
In order to achieve the purpose, the invention provides the following technical scheme: an assembly type concrete truss building structure comprises concrete precast slabs arranged between building bodies, a truss reinforcing structure is arranged under the joint of the concrete precast slabs and the building bodies, the truss reinforcing structure is sequentially provided with a partial pressure supporting mechanism, a supporting main board, a supporting structure and a pressure-bearing side board positioned at the inner end of the supporting structure from top to bottom, the partial pressure supporting mechanism comprises a plurality of groups of anchor rods prefabricated at the bottoms of the concrete precast slabs, partial pressure supporting frames are fixed at the bottoms of every four groups of anchor rods, penetrating grooves are formed in the middle of the partial pressure supporting frames, longitudinal plates are inserted among the penetrating grooves, transverse plates are arranged under the longitudinal plates, the inner ends of the transverse plates are inserted into the building bodies, a plurality of groups of cross support rods are uniformly arranged at the bottoms of the transverse plates, the bottoms of the cross support rods are contacted with the supporting main board under the transverse plates, the bottom of partial pressure supporting frame also contacts with the support mainboard, the inner of supporting the mainboard is fixed and the bottom contacts with supporting construction in the building, supporting construction includes a plurality of groups of triangular supports that are connected with the support mainboard and is connected with the supporting board that is connected with the triangular supports bottom, supporting board is the slope form and sets up and inner setting in the building, and the triangular supports who is located the innermost is connected with the pressure-bearing curb plate through the reinforcing bar, place in the building in the pressure-bearing curb plate.
The partial pressure support frame is including the steel sheet that is located the bottom and the four group's connecting rods of even setting in the steel sheet corner, the connecting rod just is the slope form setting with the outer end fixed connection of stock, the resistance to compression pole has all been welded to the inboard of connecting rod, the end of resistance to compression pole contacts with the bottom of concrete precast slab, be formed with the triangular structure between connecting rod, resistance to compression pole and the concrete precast slab.
As a preferred embodiment of the present invention, a plurality of sets of slots are uniformly formed in the bottom of the vertical plate, the transverse plate is fastened in the slots, a grid structure is formed between the vertical plate and the transverse plate, a plurality of sets of mounting slots are uniformly formed in the bottom of the transverse plate, and the upper end of the cross support rod is located in the mounting slots.
In a preferred embodiment of the present invention, the cross support bar is formed by welding two sets of metal bars in a cross shape, and the ends of the metal bars are in contact with the support main plate.
As a preferred embodiment of the present invention, the surface of the supporting main board is uniformly provided with insertion holes, the middle of the steel plate is provided with threaded holes corresponding to the insertion holes, and the connection between the insertion holes and the threaded holes is provided with fixing bolts in a threaded manner.
In a preferred embodiment of the present invention, the triangular support frame is formed by welding two sets of steel rods in a V shape, the joint of the two sets of steel rods is welded to the support plate, and the upper end of the two sets of steel rods is welded to the support main plate, and a triangular structure is formed between each two adjacent sets of steel rods and the support main plate and the support plate.
As a preferred embodiment of the present invention, the pressure-bearing side plate and the vertical plane of the building body form an angle of 45 degrees and is disposed in the building body, two sets of slots are uniformly formed in the surface of the pressure-bearing side plate, a triangular support frame located at the innermost side is also provided with slots, and two ends of the reinforcing steel bar are respectively inserted into the two sets of slots.
As a preferred embodiment of the present invention, a triangular structure is formed between the supporting and protecting plate, the supporting main plate and the building body, and an angle of 30 degrees is formed between the outer end of the supporting and protecting plate and the supporting main plate.
Compared with the prior art, the invention has the following beneficial effects:
1. this scheme has designed a concrete truss structure that is used for building body suspended structure specially, and the concrete truss structure that struts is carried out the unsettled part outside building body and the building body, has utilized in its structure and has carried out the assembled structure of effective dispersion to supporting object pressure, will apply pressure homodisperse and support each position of mainboard at the downside to the inside multiunit triangle structure of cooperation can the effectual stability that improves the junction.
2. In the process of building the building, a supporting structure is preset on the outer wall of the building and is matched with a concrete truss, so that the strength of the supporting structure can be improved to a great extent.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a bottom structural view of the partial pressure support mechanism of the present invention;
FIG. 3 is a cross-sectional view of the connection of the cross plate and the longitudinal plate according to the present invention;
FIG. 4 is a view showing the construction of the partial pressure supporting frame according to the present invention;
fig. 5 is a structural view of the supporting main board according to the present invention.
In the figure, 1-a concrete precast slab, 2-a partial pressure supporting mechanism, 3-a supporting main plate, 4-a supporting structure, 5-a pressure-bearing side plate, 6-an anchor rod, 7-a partial pressure supporting frame, 8-a penetrating groove, 9-a longitudinal plate, 10-a transverse plate, 11-a cross supporting rod, 12-a triangular supporting frame, 13-a supporting plate, 14-a steel plate, 15-a connecting rod, 16-a compression resisting rod, 17-a clamping groove, 18-a mounting groove, 19-an insertion hole, 20-a threaded hole, 21-a steel rod and 22-a slotted hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
Referring to fig. 1-5, the present invention provides a technical solution: an assembly type concrete truss building structure comprises concrete precast slabs 1 arranged between building bodies, a truss reinforcing structure is arranged under the joint of the concrete precast slabs 1 and the building bodies, the truss reinforcing structure is sequentially provided with a partial pressure supporting mechanism 2, a supporting main board 3, a supporting structure 4 and a pressure-bearing side board 5 positioned at the inner end of the supporting structure 4 from top to bottom, the partial pressure supporting mechanism 2 comprises a plurality of groups of anchor rods 6 prefabricated at the bottom of the concrete precast slabs 1, partial pressure supporting frames 7 are fixed at the bottoms of every four groups of anchor rods 6, a through groove 8 is formed in the middle of each partial pressure supporting frame 7, a longitudinal plate 9 is inserted between the through grooves 8, a transverse plate 10 is arranged under the longitudinal plate 9, the inner ends of the transverse plate 10 are inserted in the building bodies, a plurality of groups of cross supporting rods 11 are uniformly arranged at the bottoms of the inner ends of the transverse plate 10, the bottoms of the cross supporting rods 11 are contacted with the supporting main board, the bottom of partial pressure retaining rack 7 also contacts with supporting mainboard 3, the inner of supporting mainboard 3 is fixed and the bottom contacts with supporting construction 4 in the building, supporting construction 4 includes a plurality of groups of triangular supports 12 that are connected with supporting mainboard 3 and is connected with the supporting board 13 that is connected with triangular supports 12 bottom, supporting board 13 is the slope form and sets up and the inner sets up in the building internally, the triangular supports 12 that are located the innermost is connected with pressure-bearing curb plate 5 through the reinforcing bar, place in the building internally in pressure-bearing curb plate 5.
The partial pressure support frame 7 comprises a steel plate 14 positioned at the bottom and four groups of connecting rods 15 uniformly arranged at the corners of the steel plate 14, the connecting rods 15 are fixedly connected with the outer ends of anchor rods 6 and are arranged in an inclined manner, compression resistant rods 16 are welded on the inner sides of the connecting rods 15, the pressure bearing capacity of the partial pressure support frame 7 can be effectively improved due to the arrangement of the compression resistant rods 16, the tail ends of the compression resistant rods 16 are contacted with the bottom of a concrete precast slab 1, a triangular structure is formed among the connecting rods 15, the compression resistant rods 16 and the concrete precast slab 1, pressure bearing side plates 5 are arranged in advance at the lower position of a suspension structure in the building process (or are chiseled out in the later suspension structure erection process), the pressure bearing side plates 5 are obliquely arranged, then concrete precast slabs 1 for bearing the object (a plurality of groups of anchor rods are arranged in advance at the bottom of the slab before the building, and each four groups are in a unit) are, then through bolted construction with the outer end of stock and the connecting rod 15 fixed connection of partial pressure support frame 7, keep partial pressure support frame 7's steel sheet 14 to be in on same horizontal plane, then it has a plurality of groups vertical plate 9 to alternate between partial pressure support frame 7, transversely be provided with diaphragm 10 in vertical plate 9's draw-in groove 17, the inner of diaphragm 10 is as for the inside of the building body, and fix partial pressure support frame 7 on supporting mainboard 3 through the gim peg, the end that supports mainboard 3 sets up inside the building body, be the slope form welding at the bottom that supports mainboard 3 and prop up backplate 13, the inner of backplate 13 sets up inside the building body, it has a plurality of groups of triangular supports 12 to prop up between the mainboard 3 evenly to prop up the board 13, at last be located the most inboard triangular supports 12 and be connected with pressure-bearing curb plate 5 through the reinforcing bar.
Further improved, as shown in fig. 1: a plurality of groups of clamping grooves 17 have been evenly seted up to the bottom of vertical plate 9, diaphragm 10 buckle is in clamping groove 17, be formed with latticed structure between vertical plate 9 and the diaphragm 10, a plurality of groups of mounting grooves 18 have evenly been seted up to the bottom of diaphragm 10, the upper end of cross bracing piece 11 is located mounting groove 18, the connected mode of buckle is formed into latticed structure between vertical plate 9 and the diaphragm 10, can effectually cut apart concrete precast slab 1's pressure, can effectually reduce concrete precast slab 1 in addition and take place the possibility of skew at the building in-process.
Further improved, as shown in fig. 1: the cross bracing piece 11 is that the cross form welding forms and terminal and support mainboard 3 contacts by two sets of metal poles, and such design is favorable to improving the intensity and the stability that lie in between diaphragm 10 of 1 bottom of concrete precast slab and the support mainboard 3, avoids the lateral deviation of the unsettled building body.
Further improved, as shown in fig. 4 and 5: jacks 19 are uniformly formed in the surface of the supporting main plate 3, threaded holes 20 corresponding to the jacks 19 are formed in the middle of the steel plate 14, fixing bolts are arranged at the joints of the jacks 19 and the threaded holes 20, the supporting main plate 3 and the multiple groups of partial pressure supporting frames 7 are supported through the fixing bolts, the stability between the concrete precast slab 1 for bearing objects and the supporting main plate 3 can be improved, and the pressure of the concrete precast slab 1 is favorably and uniformly distributed to all positions of the supporting main plate 3.
Further improved, as shown in fig. 1: triangular support frame 12 is V style of calligraphy welding by two sets of steel poles 21 and forms, and the junction welding of two sets of steel poles 21 and prop up on the backplate 13 and the upper end and support mainboard 3 and weld mutually, all be formed with the triangular structure between adjacent two sets of steel poles 21 and the support mainboard 3, the backplate 13, and the multiunit triangular support frame 12 of design can improve support mainboard 3 and the intensity and the stability between the supporting structure.
Further improved, as shown in fig. 1: 45 degrees angles are personally submitted with the vertical of the building body to pressure-bearing curb plate 5 and set up in the building body, two sets of slotted holes 22 have evenly been seted up on 5 surfaces of pressure-bearing curb plate, the slotted hole 22 has also been seted up on being located the most inboard triangular supports frame 12, the both ends of reinforcing bar alternate respectively in two sets of slotted holes 22, preset pressure-bearing curb plate 5 inside the building body, and be connected with the supporting construction 4 who undertakes main holding power through the reinforcing bar, can effectually improve whole unsettled structure's bearing strength.
Specifically, the shaping is the triangular construction between supporting plate 13, the support mainboard 3 and the building body, and the outer end of supporting plate 13 and support be formed with the 30 degrees angles between the mainboard 3, will be formed with triangular construction can effectual improvement whole supporting construction's stability and intensity between supporting plate 13, the support mainboard 3 and the building body on the whole.
When in use: the invention is characterized in that a pressure-bearing side plate 5 is preset at the lower position of a suspended structure in the process of building a building (or is chiseled out in the process of erecting the suspended structure at the later stage), the pressure-bearing side plate 5 is obliquely arranged, then a concrete precast slab 1 for bearing an object (a plurality of groups of anchor rods are preset at the bottom of the slab before forming, each four groups are in a unit) is horizontally arranged at the outer side of the building, then the outer end of each anchor rod is fixedly connected with a connecting rod 15 of a partial pressure support frame 7 through a bolt structure, steel plates 14 of the partial pressure support frame 7 are kept on the same horizontal plane, then a plurality of groups of longitudinal plates 9 are inserted between the partial pressure support frames 7, a transverse plate 10 is transversely arranged in a clamping groove 17 of each longitudinal plate 9, the inner end of each transverse plate 10 is arranged in the building, the partial pressure support frame 7 is fixed on a support main plate 3 through a fixing bolt, the tail end of the support main plate 3 is arranged in, the bottom of the supporting main board 3 is an inclined welding supporting plate 13, the inner end of the supporting plate 13 is arranged in a building body, a plurality of groups of triangular support frames 12 are uniformly welded between the rest supporting main boards 3 of the supporting plate 13, and finally the triangular support frame 12 located at the innermost side is connected with the pressure-bearing side board 5 through reinforcing steel bars.
The product protected by the scheme is put into practical production and application at present, and particularly achieves certain success in the technical field of building structures, so that the technical scheme of the product is obviously proved to be beneficial, meets social requirements, and is suitable for batch production and popularization and use.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An assembled concrete truss building structure, including setting up concrete precast slab (1) between the body of building, its characterized in that: a truss reinforcing structure is installed right below the joint of the concrete precast slab (1) and the building body, the truss reinforcing structure is sequentially provided with a partial pressure supporting mechanism (2), a supporting main board (3), a supporting structure (4) and a pressure-bearing side plate (5) positioned at the inner end of the supporting structure (4) from top to bottom, the partial pressure supporting mechanism (2) comprises a plurality of groups of anchor rods (6) prefabricated at the bottom of the concrete precast slab (1), partial pressure supporting frames (7) are fixed at the bottoms of every four groups of anchor rods (6), a through groove (8) is formed in the middle of each partial pressure supporting frame (7), a longitudinal plate (9) is inserted between the through grooves (8), a transverse plate (10) is arranged right below the longitudinal plate (9), the inner end of the transverse plate (10) is inserted into the building body, and a plurality of groups of cross-shaped supporting rods (11) are uniformly arranged at the bottom of the building body, the bottom of the cross supporting rod (11) is in contact with the supporting main board (3) right below, the bottom of the partial pressure supporting frame (7) is also in contact with the supporting main board (3), the inner end of the supporting main board (3) is fixed in the building body, the bottom of the supporting main board (3) is in contact with the supporting structure (4), the supporting structure (4) comprises a plurality of groups of triangular supporting frames (12) connected with the supporting main board (3) and a supporting plate (13) connected with the bottom of the triangular supporting frames (12), the supporting plate (13) is arranged in an inclined manner, the inner end of the supporting plate is arranged in the building body, the triangular supporting frame (12) positioned at the innermost side is connected with the pressure-bearing side plate (5) through reinforcing steel bars, the pressure-bearing side plate (5) is arranged in the building body, the partial pressure supporting frame (7) comprises a steel plate (14) positioned at the bottom and, the concrete precast slab is characterized in that the connecting rod (15) is fixedly connected with the outer end of the anchor rod (6) and is arranged in an inclined manner, the anti-pressure rod (16) is welded on the inner side of the connecting rod (15), the tail end of the anti-pressure rod (16) is in contact with the bottom of the concrete precast slab (1), and a triangular structure is formed among the connecting rod (15), the anti-pressure rod (16) and the concrete precast slab (1).
2. An assembled concrete truss building structure as claimed in claim 1 wherein: a plurality of groups of clamping grooves (17) are uniformly formed in the bottom of the longitudinal plate (9), the transverse plate (10) is buckled in the clamping grooves (17), a grid-shaped structure is formed between the longitudinal plate (9) and the transverse plate (10), a plurality of groups of mounting grooves (18) are uniformly formed in the bottom of the transverse plate (10), and the upper end of the cross supporting rod (11) is located in the mounting grooves (18).
3. An assembled concrete truss building structure as claimed in claim 2 wherein: the cross support rod (11) is formed by welding two groups of metal rods in a cross shape, and the tail end of the metal rods is in contact with the support main board (3).
4. An assembled concrete truss building structure as claimed in claim 3 wherein: jacks (19) are uniformly formed in the surface of the support main board (3), threaded holes (20) corresponding to the jacks (19) are formed in the middle of the steel plate (14), and fixing bolts are arranged at the connecting positions of the jacks (19) and the threaded holes (20) in a threaded mode.
5. An assembled concrete truss building structure as claimed in claim 4 wherein: triangular supports frame (12) are V style of calligraphy welding by two sets of steel poles (21) and form, and are two sets of on the junction welding of steel pole (21) and a backplate (13) and the upper end with support mainboard (3) and weld mutually, adjacent two sets of all be formed with the triangular structure between steel pole (21) and support mainboard (3), a backplate (13).
6. An assembled concrete truss building structure as claimed in claim 5 wherein: the angle of 45 degrees and set up in the building body are personally submitted with the vertical of building body to pressure-bearing curb plate (5), two sets of slotted holes (22) have evenly been seted up on pressure-bearing curb plate (5) surface, are located and have also seted up slotted hole (22) on innermost triangular supports frame (12), the both ends of reinforcing bar are inserted respectively in two sets of slotted holes (22).
7. An assembled concrete truss building structure as claimed in claim 6 wherein: the forming is triangular structure between fender (13), the support mainboard (3) and the building body, be formed with the 30 degrees angles between the outer end of fender (13) and the support mainboard (3).
CN201911031737.9A 2019-10-28 2019-10-28 Assembled concrete truss building structure Active CN110735478B (en)

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CN110735478B true CN110735478B (en) 2021-04-30

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CN207452737U (en) * 2017-11-20 2018-06-05 中铁二十局集团第一工程有限公司 Large span rigid frame-continuous girder bridge pier pier top bracket
CN207974016U (en) * 2018-03-09 2018-10-16 陕西华山路桥集团有限公司 A kind of steel truss pushing tow support system
CN109267487A (en) * 2018-10-15 2019-01-25 中建三局第二建设工程有限责任公司 A kind of long big section bent cap bracket system of overhanging
CN208578228U (en) * 2018-05-14 2019-03-05 深圳墨泰建筑设计与咨询股份有限公司 A kind of haunch formula large panel structure for basement
CN208792770U (en) * 2018-08-22 2019-04-26 中国水利水电第八工程局有限公司 Outer support assembling truss cantilever form
CN110004832A (en) * 2019-04-09 2019-07-12 宁波市政工程建设集团股份有限公司 Long span cantilever truss formula bent cap strutting system and construction method
CN209323524U (en) * 2018-10-31 2019-08-30 中建一局集团建设发展有限公司 A kind of foundation pit mixing support construction

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6044593A (en) * 1998-01-28 2000-04-04 Puls; John L. Free hanging canopy
CN1376845A (en) * 2001-03-22 2002-10-30 梁大勇 Technology for constructing large concrete roof
CN103628416A (en) * 2013-12-18 2014-03-12 中铁大桥局股份有限公司 Stiffening girder counter-straining near-pier bracket of suspension bridge
CN105178188A (en) * 2015-07-10 2015-12-23 北京市政建设集团有限责任公司 Novel triangular frame supporting structure and formwork
CN105625732A (en) * 2015-12-30 2016-06-01 常州第一建筑集团有限公司 Supporting-free construction method of ultrahigh overhung steel-structure truss
CN206289981U (en) * 2016-11-03 2017-06-30 北京建工四建工程建设有限公司 A kind of steel pipe truss is encorbelmented floor support plate gusseted and form bracing system
CN207452737U (en) * 2017-11-20 2018-06-05 中铁二十局集团第一工程有限公司 Large span rigid frame-continuous girder bridge pier pier top bracket
CN108004927A (en) * 2017-11-30 2018-05-08 中铁二十局集团第工程有限公司 Double limb triangle hanging basket and large span continuous rigid frame bridge cantilever beam section construction methods
CN207974016U (en) * 2018-03-09 2018-10-16 陕西华山路桥集团有限公司 A kind of steel truss pushing tow support system
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CN208792770U (en) * 2018-08-22 2019-04-26 中国水利水电第八工程局有限公司 Outer support assembling truss cantilever form
CN109267487A (en) * 2018-10-15 2019-01-25 中建三局第二建设工程有限责任公司 A kind of long big section bent cap bracket system of overhanging
CN209323524U (en) * 2018-10-31 2019-08-30 中建一局集团建设发展有限公司 A kind of foundation pit mixing support construction
CN110004832A (en) * 2019-04-09 2019-07-12 宁波市政工程建设集团股份有限公司 Long span cantilever truss formula bent cap strutting system and construction method

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