Anti-scouring device suitable for pile foundation of pile group in water and construction method thereof

A construction method and anti-scour technology, applied in protection devices, infrastructure engineering, construction, etc., can solve problems such as the impact on the safety and stability of the bridge, the impact on the safety and stability of the bridge, and the reduction of the effective embedding depth, so as to improve the bearing capacity. Strength, simple and quick construction, and the effect of suppressing damage

Active Publication Date: 2020-06-30
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formation and movement of the horseshoe-shaped vortex and wake vortex enhance the transport capacity of the surface material of the river bed, thus forming obvious local scour pits in the bridge pile foundation, which will reduce the effective embedding depth of the bridge pile foundation in the

Method used

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  • Anti-scouring device suitable for pile foundation of pile group in water and construction method thereof
  • Anti-scouring device suitable for pile foundation of pile group in water and construction method thereof
  • Anti-scouring device suitable for pile foundation of pile group in water and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1:

[0043] This embodiment discloses an anti-scour pit device suitable for group piles in water, including a flexible cap 1 and a reinforced concrete fixing structure 2 arranged in the foundation soil layer 4 at the bottom of the bed.

[0044] see figure 1 Or 3, the flexible support platform 1 is in the shape of a quadrangular pyramid, the flexible support platform 1 is made of high-strength plastic, the interior of the flexible support platform 1 is hollow, and the hollow portion is denoted as a cavity S. see image 3 , the flexible bearing platform 1 is provided with a number of pile holes 101 for the pile foundation 3 to pass through. The pile holes 101 penetrate through the upper and lower plate surfaces of the flexible bearing platform 1. The upper surface of the flexible bearing platform 1 is provided with a number of reserved holes 102. The undisturbed soil of the bed flows into the cavity S through several reserved holes 102 .

[0045] see Figure 4...

Example Embodiment

[0048] Example 2:

[0049] This embodiment discloses an anti-scour pit device suitable for group piles in water, including a flexible cap 1 and a reinforced concrete fixing structure 2 arranged in the foundation soil layer 4 at the bottom of the bed.

[0050] see Figure 5 The flexible support platform 1 is in the shape of a quadrangular pyramid, and the flexible support platform 1 is formed by splicing a plurality of assemblies 103 through a mortise and tenon structure. The upper surface of each assembly 103 is provided with a reserved hole 102 , and the undisturbed soil of the bottom bed flows into the cavity S through the reserved holes 102 .

[0051]The assembly 103 is made of fiber material, the interior of the assembly 103 is hollow, and the hollow part is denoted as a cavity S. Several of the assembly parts 103 are longitudinally cut from a complete quadrangular platform. A number of semicircular grooves 1011 are provided on the cutting surface of the assembly parts 1...

Example Embodiment

[0057] Example 3:

[0058] Based on the anti-scour pit device for group pile foundations in water described in Embodiment 1, this embodiment discloses a construction method of the device, including the following steps:

[0059] 1) Manufacture the matching flexible bearing platform 1 and the reinforced concrete fixing structure 2 . Wherein, the reinforced concrete fixed structure 2 is equipped with tensile steel bars.

[0060] 2) In an unbuilt bridge, a pre-buried pit is excavated on the upper surface of the foundation soil layer 4 at the bottom of the bed. Among them, several of the pile foundations 3 that have been poured pass through a pre-embedded pit, and the pre-embedded pit matches the size of the reinforced concrete fixing structure 2 . The undisturbed soil of the bottom bed obtained by excavating the pre-embedded pit will be subsequently poured into the cavity S, so as to obtain materials in situ.

[0061] 3) On the horizontal plane, several pile foundations 3 pass ...

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Abstract

The invention discloses an anti-scouring device suitable for a pile foundation of a pile group in water and a construction method thereof, and relates to the technical field of bridge pile foundationreinforcement. The anti-scouring device suitable for the pile foundation of the pile group in water comprises a flexible bearing platform and a reinforced concrete fixing structure which are arrangedin a bed bottom foundation soil layer. The flexible bearing platform is a hollow quadrangular frustum pyramid, the hollow part of the flexible bearing platform is filled with sand and gravel, and theflexible bearing platform is arranged at the bottom of the pile group in a sleeving mode through a plurality of pile holes. The reinforced concrete fixing structure is provided with a special-shaped hole matched with the flexible bearing platform in shape, the flexible bearing platform is embedded into the special-shaped hole, and the anti-scouring device for the pile foundation of the pile groupis formed. According to the anti-scouring device suitable for the pile foundation of the pile group in water and the construction method thereof, damage of horseshoe-shaped vortexes and trailing vortexes to the pile foundation can be effectively inhibited, the contact part of the device and the pile foundation can protect the pile foundation from being scoured and corroded by water, and the bearing capacity of the pile foundation of the pile group is improved; and meanwhile, the anti-scouring device suitable for the pile foundation of the pile group in water is suitable for a built bridge pilefoundation and an unexpanded bridge pile foundation, and has the characteristics of being simple and rapid in construction, low in cost, safe and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of bridge pile foundation reinforcement. Background technique [0002] In recent years, my country's economy has developed rapidly, and a large number of large bridges across large rivers, such as the Hong Kong-Zhuhai-Macao Bridge, the Donghai Bridge, the Hangzhou Bay Bridge, and the Lijiatuo Bridge in Chongqing, have been built immediately. Most of these river-crossing bridges adopt deep-water pile group foundations, and their volume and water-blocking area are relatively large. The safety and stability of bridge pile foundations in complex water flow environments not only depend on their stress conditions in complex water environment, but also are related to the shallowing of bridge pile foundations caused by water erosion, which leads to the reduction of pile foundation bearing capacity. And a large number of investigation and statistical results also show that one of the main reasons for bridge damage i...

Claims

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Application Information

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IPC IPC(8): E02D27/12E02D27/14E02D27/52E02D31/00E02D31/06
CPCE02D27/12E02D27/14E02D27/52E02D31/00E02D31/06
Inventor 周航王增亮丁选明吴岱峰蒋鑫刘冒佚唐毅胡涛张卢喻
Owner CHONGQING UNIV
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