Construction method of high-fill bridge bearing platform structure

A construction method and technology for bridges, which are applied in infrastructure engineering, bridges, bridge parts, etc., can solve the problems of concentrated distributed loads and low bearing capacity of bridge caps, and achieve the goal of improving bearing capacity, ensuring construction quality, and improving stability. Effect

Pending Publication Date: 2022-03-11
CCCC FOURTH HARBOR ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the objectives of the present invention is at least to provide a high-fill bridge for the problems of low bearing capacity of the bridge cap and excessively concentrated distributed loads that affect the safety of the bridge structure when the bridge pile foundation adopts a single-column or independent double-column structure. The construction method of the cap structure, the construction method arranges a plurality of caps, and uses the caps to tie the beams to connect the multiple caps into an integral bridge cap structure, and pours a cushion between the bottom of the bridge cap and the base , so that multiple caps are poured on the same level in the subsequent pouring process, so as to improve the bearing capacity of the bridge cap, and make the distributed load evenly distributed, so as to ensure the safety and stability of the bridge structure

Method used

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  • Construction method of high-fill bridge bearing platform structure
  • Construction method of high-fill bridge bearing platform structure
  • Construction method of high-fill bridge bearing platform structure

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Such as figure 1 , figure 2 , image 3 As shown, the present invention provides a high-fill bridge cap structure, the high-fill bridge cap structure includes: bridge cap 1, cushion layer 2, pile foundation 3, cap tie beam 4 and pier column 5 ; The bridge cap 1, the pile foundation 3, the cap tie beam 4 and the pier column 5 are steel-concrete structures with a steel skeleton inside; the pile foundation 3 includes two or more pile columns, and each of the The top of each pile extends into the inside of the bridge cap 1; a cushion layer 2 is arranged between the bottom of the bridge cap 1 and the base, and a pier 5 is arranged on the top of the bridge cap 1, and the pier 5 is arranged on the top of the bridge cap 1. 5 includes two or more columns, and the bottom reinforcement of each column is embedded in the bridge cap 1; the bridge cap 1 includes a first cap 11 and a second cap 12, and the bridge cap A cushion layer 2 is provided between the bottom of 1 and the base...

Embodiment 2

[0051] Such as Figure 4 As shown, in order to adapt to the soil structure of the high fill foundation, further increase the stability of the bridge, and improve the safety of the bridge, on the basis of Embodiment 1, a third cap 13 is added on the right side of the second cap 12 , a cap tie beam 4 is connected between the second cap 12 and the third cap 13, and a pier column 5 is connected to the center of the top surface of the third cap 13, so that the bridge cap structure is suitable for three columns or more The column piers can improve the capacity of the bridge cap to bear and distribute the load, avoid local subsidence of the high fill foundation soil, and improve the safety of the bridge.

[0052] The invention provides a construction method for a high-fill bridge cap structure, such as Figure 5 Shown, described high fill bridge cap structure construction method comprises the following steps:

[0053] excavation pit

[0054] Before excavating the foundation pit, m...

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Abstract

The invention relates to the technical field of high-fill subgrade bridge construction, and particularly discloses a high-fill bridge bearing platform structure construction method.The bridge bearing platform structure comprises a bridge bearing platform, pile foundations and pier studs, the bridge bearing platform comprises a plurality of bearing platform straining beams, so that the multiple bearing platforms form an integral bridge bearing platform structure, and when the bridge bearing platform structure is constructed, the pile foundations are arranged on the pile foundations, and the pier studs are arranged on the pile foundations; comprising the steps that A, a foundation pit is excavated; b) treating the pile head; c) treating a base and pouring a cushion layer, and pouring the cushion layer between the bottom of the bridge bearing platform and the base for integrally pouring the bridge bearing platform structure on the cushion layer; d) steel bars are manufactured and installed; e) mounting a template; f) concrete is poured and maintained; g) removing the template; and H) backfilling and compacting the foundation pit, and integrally pouring the pouring bridge bearing platform structure on the cushion layer, so that a plurality of bearing platforms are poured on the same horizontal plane, an integral stress effect is formed, the stability and stress uniformity of the bridge bearing platform structure are ensured, and overlarge local load is avoided.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a construction method for a high-fill bridge cap structure. Background technique [0002] As the lower structure of the bridge, the bridge cap connects the pile foundation, pier column and superstructure together, bears the load transmitted by the upper pier column, and distributes the upper load to the pile foundation, and occupies an important position in the bridge structure. Existing bridge pile foundations usually adopt a single-column or independent double-column structure, that is, a cap is poured on the top of each pile foundation, and pier columns are arranged on the top of the cap. However, for high fill foundations, the bearing capacity of the soil is lower than that of the original geological layer, and the ability of single-column or independent double-column pile foundations to carry and distribute loads is limited, which easily causes uneven settlement ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/00E02D27/12E02D27/14
CPCE01D21/00E01D19/00E02D27/12E02D27/14
Inventor 陆彬杨铁男王建骆舟
Owner CCCC FOURTH HARBOR ENG CO LTD
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