Treatment method of deviation and fracture remediation of pile body of filling pile

A treatment method and cast-in-situ pile technology, which is applied in the direction of sheet pile walls, buildings, and foundation structure engineering, can solve the problems of unfavorable overall benefits and organizational management, the inability to modify the design, and the large amount of design modification, etc., to achieve low overall cost, The effect of high construction requirements and low construction cost

Active Publication Date: 2013-12-11
浙江省岩土基础有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the amount of design modification is huge, which is not conducive to the overall benefit and organizational management of the project
In the event of a large-scale pile foundation accident, the desig

Method used

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  • Treatment method of deviation and fracture remediation of pile body of filling pile
  • Treatment method of deviation and fracture remediation of pile body of filling pile
  • Treatment method of deviation and fracture remediation of pile body of filling pile

Examples

Experimental program
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Example Embodiment

[0068] Example 1:

[0069] like Figure 1 to Figure 6 As shown in the figure: the upper part of the cast-in-place pile in this embodiment is deflected and has a fractured part, and the specific method steps of implementing remedial treatment are as follows:

[0070] 1) Low strain measurement to determine the position of the defect of the pile; to determine where the pile body is deflected and fractured at the same time;

[0071] 2) Implement pile body correction:

[0072] a) Unloading: Carry out unloading 1 on the side to be reset, and unload the soil to 1m below the fracture depth ( figure 1 );

[0073] b) Pile reset: Then reset the fractured and deflected pile 2, and pull it back to the design pile position or the approximate design pile position ( figure 2 );

[0074] c) Filler: After the deviation correction is completed, the sand and gravel mixed filler 4 ( figure 2 , 3 );

[0075] 3) Core drilling at the top of the pile: According to the position and degree of ...

Example Embodiment

[0089] Example 2

[0090] The remedial processing steps of Example 2 and Example 1 are basically the same.

[0091] The defective pile diameter of Example 2 was 1 m. After steps 1 and 2, step 3) When drilling the top of the pile to take the core, drill two 11cm holes on the top of the pile;

[0092] After steps 4 and 5, step 6) When the high-pressure cement slurry is used for punching and filling, the cement slurry with a water-cement ratio of 0.7 is configured, and the defect position is washed back and forth with high pressure for many times. Small voids at the defect location;

[0093] Step 7) When intubating, also insert the grouting pipe 7, the special pipe for quick-setting agent 7' and the unloading pipe 8. The pipes are made of 1-inch seamless steel pipes, and a one-way ball valve 6 is installed on the upper part; the grouting pipe 7 and the quick-setting agent are installed. The length of the special agent pipe 7' reaches 10cm below the defect position, the groutin...

Example Embodiment

[0100] Example 3 :

[0101] like Figures 9 to 13 As shown: the pile foundation defect in this embodiment is not only one deflection fracture, but also two deflection fracture sites. The process flow of the two deflection fracture sites is basically the same as that of Example 1, but because there are two deflection fracture sites The broken part, so the specific operation has its special place:

[0102] 1) Low-strain measurement to determine the defect position of the pile; to determine where the deflection fracture occurs in the pile body;

[0103] 2) Implement pile body correction:

[0104] a) Unloading: Carry out unloading 1 on the side to be reset, and unload the soil to 1m below the fracture depth ( Figure 8 );

[0105] b) Pile reset: then reset the top fractured and deflected pile 2, ( Figure 9 );

[0106] When implementing the above two steps a) and b), first rectify the deflection and fracture of the upper pile body, and then rectify the deflection and fractur...

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Abstract

The invention discloses a treatment method of deviation and fracture remediation of a pile body of a filling pile. The treatment method of the deviation and fracture remediation of the pile body of the filling pile is characterized by comprising the following steps: 1) dynamically determining the defect position of the pile under low stress; 2) rectifying the deviation of the pile body; 3) drilling and coring the top of the pile, wherein the coring length exceeds the defect position, and is 1-2 times of the diameter of the pile body; 4) flushing holes with high pressure, namely clearing filled materials of mud and the like in the defect position; 5) clearing the holes, namely returning sink residue in core holes out of the core holes; 6) filling the holes by high-pressure cement paste, namely filling cracks in the defect position; 7) inserting pipes, namely inserting slurry filling pipes, special accelerator pipes and paste discharge pipes; 8) sealing the holes, namely sealing the top parts of the core holes; 9) filling paste under high pressure, namely filling cement paste into the core holes; 10) carrying out backfill consolidation grouting on a soil discharge area and an empty hole area close to the pile. The method provided by the invention is simple and feasible, the working period of filling pile quality defect remediation treatment is short, the remediation construction cost is low, the original engineering design change is small, the quality of the remedied pile is reliable, and he original defect pile can be remedied and can achieve the standard through low-stress dynamic repeated determination.

Description

technical field [0001] The invention relates to the technical field of pile foundations of construction engineering, in particular to a remedial treatment method for quality defects such as deflection and fracture of cast-in-situ piles. Background technique [0002] The pile foundation is the infrastructure of the building, and the solidity of the pile foundation project is the basic guarantee for the stability of the building for a century. Therefore, during construction, the cast-in-place piles must be up to standard. However, the quality defects of cast-in-situ piles will inevitably occur in construction, so how to take reasonable remedial measures for the quality defects of cast-in-situ piles, and how to make cast-in-situ piles with defective quality can reach the standard quickly, simply and economically has become a pile Research topics for basic engineering and technical personnel. [0003] At present, the commonly used methods for treating the defects of cast-in-si...

Claims

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Application Information

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IPC IPC(8): E02D5/64
Inventor 汪拾金王进明虞利军丁旭亭严一华陆舟超苏华
Owner 浙江省岩土基础有限公司
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