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Construction method of mixing pile based on water-rich organic matter soft soil layer channel

A construction method and organic matter technology, which are applied in basic structural engineering, sheet pile walls, buildings, etc., can solve the problems of low pile strength, and achieve the effects of increasing construction steps, simple construction technology, and ensuring project stability.

Active Publication Date: 2022-07-08
NANJING WATER CONSERVANCY CONSTR ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a construction method of mixing piles based on water-rich organic soft soil layers, which can overcome the shortcomings of low pile strength of conventional cement-soil mixing piles in water-rich organic soft soil layers with high plasticity index , to provide a construction method for mixing piles in water-rich organic matter soft soil layers, effectively improving the pile strength

Method used

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  • Construction method of mixing pile based on water-rich organic matter soft soil layer channel
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  • Construction method of mixing pile based on water-rich organic matter soft soil layer channel

Examples

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Effect test

Embodiment 1

[0040] like Figure 1-5 , a method for constructing a stirring pile based on a water-rich organic matter soft soil layer channel, comprising the following steps:

[0041] 1) Measure the stakeout, mark and determine the position of the pile hole;

[0042] 2) The pile hole 6 is drilled at the pile position by the drilling rig 1, and the casing 4 is simultaneously lowered during the drilling of the pile hole 6;

[0043] 3) After drilling to the design elevation, stop drilling and pump fine sand;

[0044] 4) After the core tube of the drill pipe 3 is filled with fine sand, gradually lift the drill pipe 3 and the second arc plate section 9 of the casing 4;

[0045] 5) After lifting the drill pipe 3 out of the casing 4, stop pumping and form a sand pile 7;

[0046] 6) According to the pile position serial number, use the above method to drill the pile holes 6 in sequence in the subsequent pile positions;

[0047] 7) When the third pile hole 6 is drilled, use the cement pile mixe...

Embodiment 2

[0049] On the basis of Example 1, in the step 4), the lifting speed of the drill pipe 3 and the second arc plate section 9 is controlled at 3.0-4.0m / min, and every 20-30min in the process, the " Pumping-reverse pump-pumping-reverse pump” operation to avoid pipeline blockage;

[0050] Drilling rig 1 in this example uses a CFG long auger;

[0051] In the above construction process, PC220 backhoe was used for removal, and 10t dump truck was used for outbound transportation to avoid the accumulation of dregs in the field.

[0052] In addition, during the construction process, after drilling rig 1 is in place, use the front and rear and left and right vertical benchmarks of drilling rig 1 tower body to check the guide rod of the tower body, correct the position, make the drill rod 3 vertically align with the center of the pile position, and ensure that the CFG long auger is formed into a sand pile The verticality deviation is less than or equal to 1.0%.

Embodiment 3

[0054] On the basis of Example 1, in the step 7), the mixing and spraying operation of the pile hole 6 adopts the method of spraying, rotating and drilling from top to bottom until the designed pile bottom elevation;

[0055] During the lifting process of the cement pile mixer, the method of spraying from bottom to top, rotating while lifting, and lifting the drill is adopted. When the cement pile mixer is lifted to a distance of 0.5m from the ground, the spraying is stopped and the lifting is continued.

[0056] In this example, when the cement pile mixer is drilled to the design elevation of the pile bottom, the in-situ spraying is carried out for 10s to 30s, and then the lifting and spraying mixing operations are carried out.

[0057] The PH-5D cement mixing pile driver is used, and the sinking and lifting speed are controlled at 80cm / min. During the sinking and shotcrete process, the drilling depth, shotcrete elevation and stop surface of the drill should be strictly contro...

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Abstract

A method for constructing a stirring pile based on a water-rich organic matter soft soil layer channel, comprising the following steps: 1) measuring and setting out; 2) drilling a pile hole, and synchronously lowering a protective tube during the drilling process of the pile hole; 3) drilling to the After designing the elevation, stop drilling and pump fine sand; 4) After the drill pipe core tube is filled with fine sand, lift the drill pipe and the second arc section of the casing; 5) Stop pumping after the drill pipe is lifted out of the casing and form sand piles; 6) According to the pile position serial number, use the above method to drill the pile holes in sequence in the subsequent pile positions; 7) When drilling to the third pile hole, use a cement pile mixer to mix the first pile hole Shotcrete work and form an impermeable wall. The patent of the present invention adopts the above method, which can overcome the shortage of low pile strength of conventional cement-soil mixing piles in the water-rich organic soft soil layer with high plastic index, and provides a mixing pile construction method in the water-rich organic soft soil layer channel, Effectively improve the pile strength.

Description

technical field [0001] The invention relates to the field of anti-seepage engineering, in particular to a construction method of a stirring pile based on a water-rich organic matter soft soil layer channel. Background technique [0002] In recent years, my country's hydropower construction and development has gradually shifted to small and medium-sized hydropower development, mainly for gate construction and farmland water system management. In rivers with abundant groundwater, it is very important to build sluice stations, conduct water system management, and construct building foundation enclosures to prevent seepage. How to effectively solve the enclosing and anti-seepage of water-rich and organic soft soil layers is one of the key technical problems in the development of small and medium-sized hydropower, and it is also the key to the normal operation of the sluice station after completion. [0003] Conventional cement-soil mixing piles generally have problems of low pi...

Claims

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Application Information

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IPC IPC(8): E02D5/46E02D5/66
CPCE02D5/46E02D5/665
Inventor 任磊陈佳培郭九春袁敏汪亮唐力向吉韩冬周荣丽
Owner NANJING WATER CONSERVANCY CONSTR ENG CO LTD
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