A construction method suitable for the foundation of long-span arch bridges

A construction method and large-span technology, applied in the field of bridge engineering, can solve the problems of small lateral bearing capacity of pile group foundation, small lateral load transmitted to the foundation, and unsuitable pile group foundation, etc., so as to improve bearing capacity and reduce construction costs. Costs, the effect of reducing requirements

Active Publication Date: 2019-02-26
GUANGXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the lateral bearing capacity of the pile group foundation is small, and for small-span arch bridges, the lateral load transmitted to the foundation is small, so the pile group foundation can be considered
However, for long-span arch bridges, because the lateral load transmitted to the foundation is extremely large, for example, it can reach more than 200,000KN, so if the pile group foundation is still used, the construction cost will also increase sharply. In the case of limited budget, the group Pile foundations are clearly no longer suitable

Method used

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  • A construction method suitable for the foundation of long-span arch bridges
  • A construction method suitable for the foundation of long-span arch bridges

Examples

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Effect test

Embodiment 1

[0067] Example 1, such as figure 1 and 2 Shown:

[0068] A long-span arch bridge foundation, including an abutment 1 and a bearing layer 2 for supporting the abutment 1, and also includes a support 3, which is arranged on the periphery of the bearing layer 2, the The supporting member 3 is used to support the bearing layer 2 in the lateral direction.

[0069] The basic structure of the present application is provided with the support member 3 for supporting the force-bearing layer 2 in the lateral direction, thereby greatly improving the lateral load-bearing capacity of the foundation of the application. The size of the support member 3 is based on the actual construction. Determine the magnitude of the lateral load on layer 2. Due to the setting of the support member 3, the lateral bearing capacity of the foundation structure is improved, thereby reducing the requirement for the bearing capacity of the bearing layer 2. Therefore, in actual construction, the excavation dept...

Embodiment 2

[0091] Embodiment 2: as figure 1 and 2 Shown:

[0092] A construction method applicable to the foundation of a long-span arch bridge, comprising the following steps:

[0093] A, trench excavation: excavate a trench on the ground corresponding to the arch bridge foundation support 3, and the lower part of the trench is located in the bearing layer 2;

[0094] B. Pouring support 3: pour concrete in the trench excavated in step A, and obtain support 3 after hardening;

[0095] C. Excavation of the foundation pit: Excavate the soil layer above the bearing layer 2 until the bearing layer 2;

[0096] D, pouring base plate 4: pouring concrete in the foundation pit formed in step C to obtain base plate 4;

[0097] E. Pouring the abutment 1: After the base plate 4 in step D is hardened, pour the abutment 1 on the base plate 4.

[0098] In the construction method of the present application, by excavating the trench, the lower part of the trench is located in the bearing layer 2, an...

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Abstract

The invention belongs to the technical field of bridge engineering, and particularly relates to a construction method suitable for a large-span arch bridge foundation. The construction method for thelarge-span arch bridge foundation comprises the following steps: A, trench excavation: excavating trenches in the ground corresponding to arch bridge foundation supporting pieces, wherein the lower parts of the trenches are positioned in a bearing stratum; B, supporting piece pouring: pouring concrete in the trenches excavated in the step A, and hardening the concrete to obtain the supporting pieces; C, foundation pit excavation: excavating a soil layer above the bearing stratum to the bearing stratum; D, foundation plate pouring: pouring concrete in a foundation pit formed in the step C to obtain a foundation plate; and E, arch seat pouring: after the foundation plate in the step D is hardened, pouring an arch seat on the foundation plate. According to the construction method, on one hand, the excavation depth can be reduced, and the foundation structure of the foundation is suitable for geology of which a covering layer is thick; and on the other hand, the bearing capacity of the foundation can be greatly improved, and thus, the foundation structure is suitable for a foundation of the large-span arch bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a construction method suitable for the foundation of a long-span arch bridge. Background technique [0002] The bridge foundation is an important part of the bridge structure, which plays an important role in transmitting the self-weight and load of the bridge structure to the foundation. [0003] For arch bridges, the superstructure of the arch bridge can convert a large part of its own weight and load into internal compressive stress. Due to this characteristic, compared with bridges with other structural forms, the load transmitted to the foundation by the arch bridge is in addition to the vertical load. , there is also a large lateral load. [0004] Based on the above-mentioned structural characteristics, in the current arch bridge design, its foundation form is usually designed as an open-cut enlarged foundation or a pile group foundation. These two ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D4/00E01D19/00E01D21/00
CPCE01D4/00E01D19/00E01D21/00
Inventor 郑皆连梅国雄张振廖宸锋黎栋家罗富元
Owner GUANGXI UNIV
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