Construction technology of cement mixing pile in soft soil roadbed

A technology of cement mixing piles and construction technology, which is applied in basic structure engineering, sheet pile wall, soil protection, etc. The effect of improving water resistance

Inactive Publication Date: 2017-10-13
昆山市交通工程集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The problem of uneven settlement of the existing soft soil subgrade is more prominent, especially the soil-rock mixed subgrade, which is reflected in the longitudinal and transverse cracking of the road surface; but the gray-soil subgrade, soil-rock mixed subgrade and other integral subgrades, such as post-grouting, rarely have longitudinal and transverse cracks in the road surface ; The core problem of uneven settlement of soft soil subgrade is to control the overall problem of subgrade stress and deformation state

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  • Construction technology of cement mixing pile in soft soil roadbed

Examples

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Effect test

Embodiment 1

[0029] A construction process of cement mixing piles for soft soil roadbeds, including the following steps;

[0030] a1. The configuration of cement slurry: mix 10 parts of cement, 1 part of water reducing agent, 0.03 part of retarder, 1 part of air-entraining agent and 0.1 part of waterproofing agent, and add 5.5 parts of water, stir again to make cement slurry ;

[0031] a2. Use a mixing pile machine to drill the selected subgrade ground with a drilling speed of 0.8m / min and a drilling depth of 20m;

[0032] a3. After reaching the required depth, carry out reverse rotation lifting, while using compressed air to squeeze the cement slurry into the borehole;

[0033] a4. Through the mixing action of the drill bit, the cement can fully mix the cement slurry and the soil. While lifting the drill bit, spraying the liquefied material, stirring and mixing, the lifting speed is 0.8m / min, and at the same time, it should be Stay at the bottom of the pile for 30s, grind the end of the pile, li...

Embodiment 2

[0038] A construction process of cement mixing piles for soft soil roadbeds, including the following steps;

[0039] a1. The configuration of cement slurry: mix 20 parts of cement, 1.5 parts of water reducing agent, 0.06 parts of retarder, 2 parts of air-entraining agent and 0.4 parts of waterproofing agent, and add 12 parts of water, stir again to make cement slurry ;

[0040] a2. Use a mixing pile machine to drill the selected subgrade ground with a drilling speed of 0.8m / min and a drilling depth of 20m;

[0041] a3. After reaching the required depth, carry out reverse rotation lifting, while using compressed air to squeeze the cement slurry into the borehole;

[0042] a4. Through the mixing action of the drill bit, the cement can fully mix the cement slurry and the soil. While lifting the drill bit, spraying the liquefied material, stirring and mixing, the lifting speed is 0.8m / min, and at the same time, it should be Stay at the bottom of the pile for 30s, grind the end of the pil...

Embodiment 3

[0047] A construction process of cement mixing piles for soft soil roadbeds, including the following steps;

[0048] a1. The configuration of cement slurry: mix 15 parts of cement, 1.3 parts of water reducing agent, 0.04 parts of retarder, 1.5 parts of air-entraining agent and 0.3 parts of waterproofing agent, and add 8.5 parts of water, stir again to make cement slurry ;

[0049] a2. Use a mixing pile machine to drill the selected subgrade ground with a drilling speed of 0.8m / min and a drilling depth of 20m;

[0050] a3. After reaching the required depth, carry out reverse rotation lifting, while using compressed air to squeeze the cement slurry into the borehole;

[0051] a4. Through the mixing action of the drill bit, the cement can fully mix the cement slurry and the soil. While lifting the drill bit, spraying the liquefied material, stirring and mixing, the lifting speed is 0.8m / min, and at the same time, it should be Stay at the bottom of the pile for 30s, grind the end of the ...

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Abstract

The invention provides a construction technology of a cement mixing pile in a soft soil roadbed. The construction technology comprises the following steps: S1, drilling a roadbed ground by a mixing pile machine till reaching a required depth; S2, after reaching the required depth, conducting reverse rotated lifting, and in addition, inputting cement paste by means of compressed air; S3, sufficiently mixing the cement paste with the soil body under the mixing action of a drill bit, and lifting the drill bit, spraying a liquefied material and mixing and blending synchronously; and S4, before lifting the drill lift out from the ground, repeatedly stirring, sinking and spraying paste, and then repeatedly conducting reverse lifting and mixing till lifting the drill bit out from the ground, thus obtaining the cement mixing pile.

Description

Technical field [0001] The invention relates to the field of roadbed construction, in particular to a construction process of cement mixing piles for soft soil roadbeds. Background technique [0002] The uneven settlement of the existing soft soil roadbed is more prominent, especially the soil-rock mixed roadbed, which is reflected in the vertical and horizontal cracks of the road surface; but the lime soil roadbed, the soil-stone mixed roadbed and other integrated roadbeds such as late grouting have very few vertical and horizontal cracks. The core problem of uneven settlement of soft soil roadbed is the overall problem of controlling the stress and deformation state of the roadbed. How to solve the problem of the overall control of the stress and deformation state of the newly-built highway subgrade in areas with many coastal mountains and ample slag can avoid the repeated problems of vertical and horizontal cracking of the road surface, saving construction funds and saving mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/08E02D5/46
CPCE02D3/08E02D5/46E02D2250/003E02D2250/0038E02D2300/0018
Inventor 王礼存林波
Owner 昆山市交通工程集团有限公司
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