Construction technology of cast-in-place piles in silt stratum with low temperature and high water content

A technology with high moisture content and construction technology, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of poor quality of piles, achieve the effects of improving forming quality, good condensation effect, and shortening the construction period

Inactive Publication Date: 2018-05-15
中冶成都勘察研究总院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of poor pile quality when constructing cast-in-situ piles in low-temperature and high-moisture-content silt-sand formations, the present invention provides a construction process for low-temperature and high-moisture-content silt-sand formation cast-in-place piles

Method used

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  • Construction technology of cast-in-place piles in silt stratum with low temperature and high water content
  • Construction technology of cast-in-place piles in silt stratum with low temperature and high water content
  • Construction technology of cast-in-place piles in silt stratum with low temperature and high water content

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Effect test

Embodiment 1

[0053] The construction technology of cast-in-place pile in silt formation with low temperature and high water content of the present invention comprises the following steps:

[0054] (1) Use high-viscosity wall-protecting mud to protect the wall of the pile hole during the drilling process;

[0055] (2) Concrete is poured into the pile hole behind the retaining wall;

[0056] (3) Post-grouting with grouting cement slurry after concrete pouring and molding.

Embodiment 2

[0058] The construction technology of cast-in-situ piles in silt formation with low temperature and high moisture content of the present invention comprises the following steps:

[0059] (1) Use high-viscosity wall-protecting mud to protect the wall of the pile hole during the drilling process;

[0060] (2) Concrete is poured into the pile hole behind the retaining wall;

[0061] (3) Post-grouting with grouting cement slurry after concrete pouring;

[0062] Wherein the high-viscosity wall protection mud in the above-mentioned steps (1) is made up of the raw material of following weight ratio:

[0063]

Embodiment 3

[0065] The construction technology of cast-in-situ piles in silt formation with low temperature and high moisture content of the present invention comprises the following steps:

[0066] (1) Use high-viscosity wall-protecting mud to protect the wall of the pile hole during the drilling process;

[0067] (2) Concrete is poured into the pile hole behind the retaining wall;

[0068] (3) Post-grouting with grouting cement slurry after concrete pouring;

[0069] Wherein the high-viscosity retaining wall mud in the above-mentioned steps (1) is made up of the raw material of following weight ratio:

[0070]

[0071]

[0072] Wherein the grouting cement slurry in the above-mentioned steps (3) is made up of the raw material of following weight ratio:

[0073] 2-3.5 parts of tap water at 1-3°C

[0074] 0.8-1.2 parts of warm water at 18-25°C

[0075] Chlorine-free antifreeze 0.001-0.003 parts.

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Abstract

The invention belongs to the technical field of construction of cast-in-place piles and discloses a construction technology of the cast-in-place piles in the silt stratum with low temperature and highwater content with an aim to solve the problem about poor pile-forming quality in construction of cast-in-place piles in the silt stratum with low temperature and high water content. The technology includes the steps of 1), performing wall retaining of pile hole walls with high-viscosity wall retaining mud during drilling; 2), after wall retaining, grouting concrete in pile holes; 3), after concrete is grouted and formed, performing post-grouting with grouting cement slurry. With the technology, cast-in-place pile forming quality can be improved, and bearing capacity is improved by more than30%.

Description

technical field [0001] The invention belongs to the technical field of cast-in-situ pile construction, and in particular relates to a construction technique of cast-in-place piles in low-temperature and high-water-content silt formations. Background technique [0002] The cast-in-place pile is directly drilled on the designed pile position, and its cross-section is circular. After the hole is formed, a steel cage is placed in the hole and concrete is poured. Therefore, cast-in-situ piles are widely used in building structures. [0003] However, during the construction of cast-in-situ piles, different geological structures are usually encountered. For example, in the coastal area, the upper layer is marine-terrestrial interfacial sedimentary layer (mainly silty clay, partially silt and silt), and the middle part is basalt and sedimentation. The silt formation with low temperature and high water content formed by the volcanic breccia layer, the lower marine-terrestrial sedime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/36C04B28/00
CPCE02D5/36C04B28/006C04B2111/00017C04B2111/00482C04B2111/00732E02D2250/0023E02D2300/0023E02D2300/0042C04B14/104C04B22/062C04B18/26
Inventor 邓安彭涛杨永红王磊
Owner 中冶成都勘察研究总院有限公司
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