Short-cantilever ballasting single-hole variable-height beam and construction method

A technology of variable height and cantilever, which is applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problems that the structural force cannot meet the requirements, and achieve the effect of maintaining beautiful features, reasonable force, and safe and reliable structural force

Pending Publication Date: 2021-09-03
ZHEJIANG COMM CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the height of the mid-span beam is reduced, the structural force cannot meet the requirements

Method used

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  • Short-cantilever ballasting single-hole variable-height beam and construction method
  • Short-cantilever ballasting single-hole variable-height beam and construction method
  • Short-cantilever ballasting single-hole variable-height beam and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] Such as Figure 1-4 As shown, a short-cantilever ballast-weight single-hole variable-height beam provided in this embodiment includes: a mid-span variable-height section 101 of the main girder, a short-cantilever ballast section 102 of the main girder, a ballast material 103, a pier support 201, Pier cap 202, pier foundation 203 and prestressed anchor rod 301. It can be seen from the figure that a pier foundation 203 and a pier cap 202 are constructed at the bridge position. Wherein, the pier foundation 203 adopts a pile foundation or an enlarged foundation.

[0041] The invention solves the inadaptability problem of span matching of the continuous variable height beam system; the continuous variable height beam system must lay side spans due to the limitation of the side-to-middle span ratio. This kind of bridge type cannot be adopted under the condition of limited terrain; the present invention adopts the idea of ​​short cantilever ballast to realize single-span var...

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Abstract

The invention relates to a short-cantilever ballasting single-hole variable-height beam and a construction method. The short-cantilever ballasting single-hole variable-height beam comprises a main beam mid-span heightening section and main beam short cantilever ballasting sections assembled on the two sides of the main beam mid-span heightening section, the main beam mid-span heightening section is gradually lowered from a fulcrum to the mid-span, and the main beam short cantilever ballasting sections are arranged on a pier support and connected with the main beam mid-span heightening section; the pre-stressed anchor rod is arranged at the tail part of the short cantilever ballasting section of the main beam and is anchored in a foundation; the construction is convenient and fast; a conventional suspension casting method can be adopted for construction, support erection can be avoided, interference of support construction and crossing roads and river valleys is reduced, and construction is convenient and fast.

Description

technical field [0001] The invention belongs to the technical field of bridge construction engineering structures, in particular to a short-cantilever pressure-weight single-hole variable-height beam and a construction method. Background technique [0002] Beam bridges spanning canyons, rivers or highways mostly adopt the structural form of continuously variable height beams. This type of structure is generally composed of pores, and the beam height generally changes in a parabola, with beautiful lines and reasonable stress. However, due to the length requirement of the side-to-span ratio, side spans cannot be arranged under some special terrain conditions, which limits the application of variable-height beams. [0003] Continuously variable height beams are generally composed of three spans, and the ratio of the side span length to the middle span length is required to be not less than 0.5. Otherwise, the negative reaction force of the side support will appear, and the be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D21/00
CPCE01D19/00E01D21/00
Inventor 刘丰洲梁启东叶小华
Owner ZHEJIANG COMM CONSTR GRP CO LTD
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