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: 2015-04-15
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

[0068] like 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:

[0069] 1) Low strain measurement to determine the defect position of the pile; determine where the pile deflects and breaks at the same time;

[0070] 2) Implementation of pile body correction:

[0071] a) Soil unloading: Unload soil 1 on the side to be reset, and unload the soil to 1m below the fracture depth ( figure 1 );

[0072] 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 );

[0073] 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 );

[0074] 3) Pile top drilling and...

Embodiment 2

[0089] The remedial treatment steps of embodiment 2 and embodiment 1 are basically the same.

[0090] 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 holes with a diameter of 11cm on the top of the pile;

[0091] 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;

[0092] 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 pip...

Embodiment 3

[0100] like Figure 9 to Figure 13 As shown: the pile foundation defect of 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:

[0101] 1) Low strain measurement to determine the defect position of the pile; determine where the deflection and fracture of the pile occur;

[0102] 2) Implementation of pile body correction:

[0103] a) Soil unloading: Unload soil 1 on the side to be reset, and unload the soil to 1m below the fracture depth ( Figure 8 );

[0104] b) Pile body reset: Then reset the upper broken and deflected pile body 2, ( Figure 9 );

[0105] 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 appr...

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Abstract

The invention discloses a remedial treatment method for cast-in-place pile deflection and fracture, which is characterized in that it includes: 1) measuring and measuring the defect position of the pile with low strain; 2) implementing correction of the pile body; Core, the core length exceeds the defect position, and the excess length is 1-2 times the diameter of the pile body; 4) High-pressure hole washing, remove mud, sand and other fillings in the defect position; 5) Clean the hole, return the sediment in the core hole Outside the core orifice; 6) High-pressure cement slurry punching and grouting: fill the crack at the defect position; 7) Intubation, inserting the grouting pipe, the special pipe for the quick-setting agent and the unloading pipe; 8) Sealing: seal the top of the core hole; 9) High-pressure grouting, filling the core hole with grout. 10) Carry out backfill consolidation grouting for the unloaded soil area and the hollow area at the pile side. The method of the invention is simple and easy to implement, the construction period for remedial treatment of cast-in-place pile quality defects is short, the remedial construction cost is low, the original engineering design is less changed, and the remedied piles are of reliable quality, and the original defective piles can all be repaired up to the standard after low-strain dynamic testing and retesting.

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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Patent Type & Authority Patents(China)
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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