CN-122013675-A - Supporting system for whole width box girder

CN122013675ACN 122013675 ACN122013675 ACN 122013675ACN-122013675-A

Abstract

The invention belongs to the technical field of bridge construction, and particularly discloses a supporting system for an entire width box girder, which comprises a pier body supported at the bottom of the box girder, a steel pipe column unit, a triangular truss bracket unit, an anchoring unit, a bearing beam unit, a distribution beam, a template unit and a temporary consolidation unit, wherein the steel pipe column unit and the triangular truss bracket unit form a vertical bearing and cantilever supporting structure for the box girder together, the anchoring unit is used for fixing the triangular truss bracket unit on the pier body, the bearing beam unit is arranged above the triangular truss bracket unit, the distribution beam and the template unit are supported between the bearing beam unit and the box girder, and the temporary consolidation unit is connected with a box girder bottom plate and a bearing platform at the bottom of the pier body. The invention can meet the high bearing capacity and high stability supporting requirement of the whole width box girder.

Inventors

ZHONG CHANGHAI
CHEN AILING
SUN WENXIN
Wan Zongtao
CAO RONGLONG
DENG CHANGJIANG

Assignees

中国水利水电第五工程局有限公司

Dates

Publication Date: 20260512
Application Date: 20260401

Claims (10)

1. The supporting system for the whole width box girder comprises a pier body supported at the bottom of the box girder and is characterized by further comprising a steel pipe column unit, a triangular truss bracket unit, an anchoring unit, a bearing beam unit, a distribution girder and template unit and a temporary consolidation unit; The steel pipe column units and the triangular truss bracket units form a vertical bearing and cantilever supporting structure for the box girder; The anchoring unit is used for fixing the triangular truss bracket unit on the pier body; The bearing beam unit is arranged above the triangular truss bracket unit; the distribution beam and the template unit are supported between the bearing beam unit and the box beam; The temporary consolidation unit is connected with the box girder bottom plate and the bearing platform at the bottom of the pier body.
2. The support system for an entire width box girder according to claim 1, wherein the steel pipe column unit comprises a plurality of steel pipe columns distributed on both sides of the load-bearing beam unit and supported between the load-bearing beam unit and the municipal bridge.
3. The support system for an entire width box girder according to claim 1, wherein the triangular truss bracket unit is supported between a pier body and the load-bearing beam unit, at least two triangular truss bracket units are arranged on both sides of the pier body, support bars are connected to the other two sides of the pier body, the support bars are arranged in an inclined manner, and both ends of the support bars are connected to the pier body and the load-bearing beam unit, respectively.
4. The support system for an entire width box girder according to claim 1, wherein the triangular truss bracket unit comprises a bracket beam and a bracket diagonal beam, the bracket beam is horizontally and transversely arranged, the bracket diagonal beam is obliquely arranged, one ends of the bracket beam and the bracket diagonal beam are connected with a pier body, one end of the bracket diagonal beam, which is far away from the pier body, is connected with the bracket beam, and a triangular support structure is formed among the bracket beam, the bracket diagonal beam and the pier body.
5. The support system for an entire width box girder according to claim 4, wherein the anchoring unit comprises a tie bar and a fastener, the tie bar is transversely pre-buried in the pier body, and an end of the tie bar is connected with an end of the delta truss bracket unit by the fastener.
6. The supporting system for the whole width box girder according to claim 5, wherein the bracket cross beam and one end, connected with the pier body, of the bracket oblique beam are connected with a node box, the node box and the pier body are fixed through the pull rod and the fastening piece, an embedded steel rod is further connected to the node box, one end of the embedded steel rod is embedded on one side of the pier body, and a base plate is inserted between the node box and the pier body.
7. A support system for an entire width box girder according to claim 1, wherein said load-bearing beam unit comprises a plurality of load-bearing beams arranged transversely and a plurality of load-bearing beams arranged longitudinally, a plurality of said load-bearing beams arranged transversely being arranged perpendicularly intersecting a plurality of said load-bearing beams arranged longitudinally.
8. The support system for an entire width box girder according to claim 1, wherein the distribution girder and the formwork unit comprise a plurality of groups of bent frames, the shapes of the groups of bent frames are adapted to the outline shape of the box girder, and the groups of bent frames are sequentially distributed at intervals along the length direction of the box girder.
9. The supporting system for the whole width box girder according to claim 1, wherein the temporary consolidation unit comprises supporting pipe columns arranged on two sides of a pier body, screw steels are arranged in the supporting pipe columns, two ends of the supporting pipe columns are respectively connected with a bottom plate of the box girder and a bearing platform at the bottom of the pier body through the screw steels, and concrete is poured into the supporting pipe columns.
10. A support system for an entire width box girder according to any one of claims 1 to 9, wherein a drop block is provided at the top of the triangular truss bracket unit, the drop block includes an upper wedge box and a lower wedge box, opposite ends of the upper wedge box and the lower wedge box are wedge surfaces, a rectangular structure is formed when the upper wedge box and the lower wedge box overlap each other, the upper wedge box and the lower wedge box can be fixed by a fastening member to bear an upper load, and the upper wedge box and the lower wedge box can be slid relatively to reduce the overall height of the drop block to form a removal gap when the fastening member is removed.

Description

Supporting system for whole width box girder Technical Field The invention relates to the technical field of bridge construction, in particular to a supporting system for an integral width box girder. Background In the field of municipal and highway bridge construction, whole width box girders (width is 30m or more, such as 33m width box girders) are a common form of upper structures of high pier bridges with large spans due to the advantages of good integrity, comfortable driving, attractive line shape and the like. The concrete pouring construction of the wide box girder needs to be configured with a reliable temporary supporting system, and the bearing capacity, the overall stability, the sedimentation control effect and the construction suitability of the wide box girder directly determine the construction quality, the structural safety and the engineering progress of the box girder. The conventional temporary support technology for the bridge box girder construction mainly comprises a full framing method, a triangular bracket method and a steel pipe bracket method, and various technologies have obvious application limitations, and are difficult to meet the comprehensive requirements of the whole width box girder, high piers, soft soil foundations and up-down cross construction: the full framing method is that a whole supporting system is formed by a floor upright rod, a cross rod and a scissor support, and is only suitable for the construction of low pier body and small span box girders. The method needs a large number of support rod pieces and foundation treatment consumable materials, the material input cost is high, the erection and dismantling procedures are complicated, the whole construction period is prolonged, the foundation is easy to subside unevenly in a soft soil foundation area, the support deformation cannot be controlled accurately, and the alignment of the wide box Liang Jiaozhu is difficult to guarantee. The triangular bracket method is that the triangular bracket is arranged by depending on the pier body to bear the upper load, and is suitable for the construction of the box girders with medium and small width. The single system has limited bearing capacity, and when the whole width box girder is larger than 30m, the bearing section and the supporting range of the bracket are insufficient, the problems of local deformation and insufficient whole bearing capacity are easy to occur, and the supporting requirement of the large-width and large-load box girder can not be met. The steel pipe support method uses single or row steel pipe upright posts as vertical supports and adapts to the construction scene of the high pier bridge. The steel pipe upright post is independently stressed, the transverse constraint and the longitudinal constraint are weak, the overall lateral movement resistance is poor, lateral instability is easy to occur under the wind load and construction unbalanced load, a supporting system is supported by a foundation, the sedimentation control difficulty is high under the soft soil foundation condition, meanwhile, the bracket occupies the lower construction space, and the requirement of up-down cross operation cannot be met. In summary, the existing supporting technology cannot solve the technical problems of insufficient bearing capacity of the whole wide box girder, poor stability of high piers, out-of-control settlement of soft soil foundations, conflict of up-down cross construction space and the like, and a combined supporting system which is strong in bearing capacity, good in stability, suitable for the wide box girder, complex in geology and convenient to construct is needed in the industry, so that the integration of wide box girder construction supporting and temporary consolidation is realized, and the construction efficiency and the structural safety are improved. Disclosure of Invention The invention provides a supporting system for an entire width box girder, and aims to meet the requirements of high bearing capacity and high stability of the entire width box girder. The supporting system for the whole width box girder comprises a pier body supported at the bottom of the box girder, and further comprises a steel pipe column unit, a triangular truss bracket unit, an anchoring unit, a bearing beam unit, a distribution girder, a template unit and a temporary consolidation unit; The steel pipe column units and the triangular truss bracket units form a vertical bearing and cantilever supporting structure for the box girder; The anchoring unit is used for fixing the triangular truss bracket unit on the pier body; The bearing beam unit is arranged above the triangular truss bracket unit; the distribution beam and the template unit are supported between the bearing beam unit and the box beam; The temporary consolidation unit is connected with the box girder bottom plate and the bearing platform at the bottom of the pier body. Compared with the prior art, the scheme