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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 design cannot be modified to meet the requirements
[0008] To sum up, the existing technical methods have different limitations in terms of safety, quality, cost input, construction period and application conditions.

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
Comparison scheme
Effect test

Embodiment 1

[0069] Such as Figure 1 to Figure 6 Shown: the upper part of the cast-in-situ pile of the present embodiment is deflected, and a fracture is arranged, and the specific method steps of its remedial treatment are as follows:

[0070] 1) Low strain measurement to determine the defect position of the pile; determine where the pile deflects and breaks at the same time;

[0071] 2) Implementation of pile body correction:

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

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

[0074] c) Filling: After the deviation correction is completed, fill the sand and gravel mixed filler 4 in the unloading area 3 and the void area 3' generated after the deflected pile body is pulled back ( figure 2 , 3 );

[0075] 3) Pile top drilling ...

Embodiment 2

[0090] The remedial treatment steps of embodiment 2 and embodiment 1 are basically the same.

[0091] The diameter of the defective pile in Example 2 is 1 m. After steps 1 and 2, step 3) when drilling and coring the top of the pile, drill two 11cm holes on the top of the pile;

[0092] After steps 4 and 5, step 6) When high-pressure cement slurry punching and grouting, configure cement slurry with a water-cement ratio of 0.7, use high pressure to wash the defect position back and forth several times, and control the pressure at 16Mpa to carry out punching and grouting, filling Small gaps at defect locations;

[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 length of the special pipe 7' for the agent reaches 10cm below the defect position, the grout discharge pipe 8 extends into the core hole 5 by 100cm, and both the grout injection pipe 7 and the grout discharge pipe 8 are 30cm higher...

Embodiment 3

[0101] Such as Figure 9 to Figure 13 As shown: the pile foundation defect in this embodiment is not only one deflection fracture, but also has two deflection fracture parts. The broken part, so the specific operation has its special place:

[0102] 1) Low strain measurement to determine the defect position of the pile; determine where the deflection and fracture of the pile occur;

[0103] 2) Implementation of pile body correction:

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

[0105] b) Pile body reset: Then reset the upper broken and deflected pile body 2, ( Figure 9 );

[0106] When implementing the two steps a) and b) above, the deflection and fracture of the upper section of the pile body shall be corrected first, and then the deflection and fracture of the pile body of the lower section shall be corrected ( Figure 10 ), and reset the pile body to the design pile position or app...

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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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