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Settlement prevention method for bridge pile foundation

An anti-settlement and pile foundation technology, applied in the direction of infrastructure engineering, construction, etc., can solve problems such as inconsistent settlement of road-bridge lap joints, increased additional stress on the upper structure, and unsteady driving of vehicles, so as to improve the radial support force and anti-corrosion torsional ability, avoid deformation or cracking, and reduce the effect of uneven settlement

Inactive Publication Date: 2021-11-16
薛人芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The uneven settlement of the bridge leads to uneven road surface, especially the road-bridge overlap section. The materials of the bridge and the roadbed are different, and the settlement rate is quite different. Therefore, the settlement of the road-bridge overlap section is inconsistent and quite complicated, which makes the vehicle cannot run smoothly. , and even the phenomenon of bridge head jumping
[0004] If the difference between the characteristic value of the bearing capacity of the foundation and the axial force exerted by the bridge on the found

Method used

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  • Settlement prevention method for bridge pile foundation
  • Settlement prevention method for bridge pile foundation
  • Settlement prevention method for bridge pile foundation

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1

[0043] A sedimentation displacement of the load, including: Piles in the pile, the soil under the pile end is transmitted to the upper portion of the load occurred to the load of the pile side, due to the diffusion of the pile side, diffused to the pile end The end of the pile ends is compressed, so the end of the pile also produces a downward displacement; the pile is elastically deformed by the elastic material after being loaded, so the top of the pile will occur, which can be seen from the above Under the action of pile top vertical load and pile circumference, the sedimentation displacement of the pile is caused.

[0044] A anti-deposition method of bridge pile foundation, including the following steps:

[0045] S1, excavation pits at the specified soil layer 1, paved the compensation layer 2 above the foundation pit;

[0046] S2, a first concrete layer 3 is paved over the compensation layer 2, and after fixing the positioning block 8 of the pile base 6 and t...

Example Embodiment

[0050] Example 2

[0051] Combine figure 1 The foundation pit is opened at the specified soil layer 1, and the compensation layer 2 and the concrete layer are seated sequentially in the foundation pit, and the thickness of the soil layer 1 is not 20-25 cm. Sie gravel is used as the compensation layer 2 to improve the bearing capacity of the soil layer 1, loosely pellets such as gravel, gravel, etc., such materials, such materials, can make a buffer of the subgrade deformation, Effectively reduce the additional stress of the base structure caused by the street base settlement, set the stiffness compensation layer in the soil layer subgrade, can effectively reduce the working sedimentation of the soil layer subgrade, and the stiffness compensation layer uses a material pair with large rebound modulus The effect of roadbed stiffness compensation is more obvious.

[0052] The concrete layer is provided with a pile base 6, and the top end of the pile found 6 is connected to a junction ...

Example Embodiment

[0054] Example 3

[0055] Based on the basis of Example 2, the combination image 3 with Figure 4 The pile base 6 includes a rod 61 and a screw pile 62 provided at the bottom of the strut 61, the sidewall of the strut 61 is provided on the sidewall portion 63, and the plurality of roots 6 The billet 61 between the pile found 6 is engaged with each other by a zigzag portion 63, and the outer portion 63 between the struts 61 between the adjacent pile base 6 is outside the protective sleeve protection, and several root piles 6 A constituent block 8 is connected between the positioning blocks 8 between adjacent pile bases 6 forms a whole, and the positioning block 8 on the outer side of the launching 7 is connected to the concrete by anchor 9, respectively. In the layer, the pile side is made to improve the pile side by adding and subtraction, and the carrying capacity of the pile side is made by the pile side, and the bearing capacity of the pile side is increased, and the occurrence ...

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Abstract

The invention relates to a settlement prevention method for a bridge pile foundation. The settlement prevention method comprises the following steps of (S1) excavating a foundation pit at a specified soil layer, and paving a compensation layer above the foundation pit; (S2) paving a first concrete layer on the compensation layer, and fixing a screw pile of the pile foundation to the interior of the first concrete layer after a positioning block of the pile foundation is fixed to the pile foundation; (S3) paving a second concrete layer between the first concrete layer and the lower part of a bearing platform after the bearing platform is placed on the upper end face of the pile foundation; and (S4) paving a backfill soil layer on the second concrete layer and tamping. According to the settlement prevention method, the pile side friction resistance and the bearing capacity of the pile foundation are improved, and settlement is slowed down.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a method for preventing settlement of bridge pile foundations. Background technique [0002] The pile foundation is a foundation composed of a plurality of piles driven or sunk into the soil and a cap connected to the top of the piles. The external force is distributed to each pile head through the cap, and then the force is transmitted to the surrounding soil and the deep soil at the pile end through the pile body and the pile end, so it belongs to the deep foundation. The pile foundation is a foundation form that is widely used at present. The application range of the pile is wide, and the pile can pass through the unfavorable geology to reach the bearing layer, so that the load of the upper structure can be reliably and stably transmitted to the lower bearing layer. [0003] The uneven settlement of the bridge leads to uneven road surface, especially th...

Claims

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Application Information

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IPC IPC(8): E02D27/12E02D27/14E02D27/16
CPCE02D27/12E02D27/14E02D27/16
Inventor 庆鹏彬赵方伟王海峰王继光赵方杰盛栋王凯黄爱华王文静卢贤瑞
Owner 薛人芳
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