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Construction method for drilling pile under bad geological conditions

A technology of geological conditions and construction methods, applied in sheet pile walls, infrastructure engineering, construction, etc., can solve problems such as poor bored pile construction methods, achieve obvious hole forming effect, improve efficiency, and avoid the effect of reducing diameter

Inactive Publication Date: 2016-08-10
江苏燕宁工程科技集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method of bored piles under adverse geological conditions, which can reduce the problem of hole collapse during the drilling process, so as to ensure that bored piles can be constructed more efficiently

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  • Construction method for drilling pile under bad geological conditions
  • Construction method for drilling pile under bad geological conditions

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Embodiment Construction

[0011] Embodiments of the present invention will be described in detail below in conjunction with examples, but those skilled in the art will understand that the following examples are only for illustrating the present invention, and should not be considered as limiting the scope of the present invention. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

[0012] The construction method of bored pile under the adverse geological conditions of the embodiment of the present invention is specifically described below:

[0013] A method for constructing bored piles under unfavorable geological conditions includes the following steps: drilling a construction hole in the soil layer at a predetermined pile positio...

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Abstract

The invention discloses a construction method for a drilling pile under bad geological conditions. The construction method comprises the following steps of drilling a construction hole in a soil layer at a preset pile position; and arranging a steel reinforcement cage in the construction hole, and pouring concrete in the steel reinforcement cage to finish the construction of the drilling pile. The method for drilling the construction hole is realized by drilling by adopting slurry mainly comprising bentonite and clay in a reverse circulation drilling mode, wherein for the slurry adopted by reverse circulation drilling, the relative density is 1.06 to 1.10, the viscosity is 18 to 28Pa.s, the sand factor is 4 weight percent or below 4 weight percent, the colloid fraction is 95 percent or above 95 percent, and the pH value is 8 to 10. According to the method, drilling operation can be performed under the condition of sandy soil, and hole-diameter shrinkage or hole collapse can be avoided, thereby improving the construction safety and the construction efficiency of the drilling pile.

Description

technical field [0001] The invention relates to the field of bridges, in particular to a method for constructing bored piles under adverse geological conditions. Background technique [0002] In construction projects such as bridges, the construction of bored piles is often involved, and the foundation is reinforced through the construction of bored piles to enhance the bearing capacity of the soil layer. At present, the construction of bored piles mostly adopts rotary excavation to form holes, and then pours piles. However, for the sandy soil layer, because the soil layer is relatively loose, when the hole is formed by rotary digging, it is easy to cause the hole to be unstable or even collapsed, thereby affecting the pouring of the pile. Contents of the invention [0003] The object of the present invention is to provide a method for constructing bored piles under adverse geological conditions, which can reduce the problem of hole collapse during the drilling process, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/36
CPCE02D5/36E02D2250/00E02D2250/0023E02D2300/002
Inventor 王海云王和平刘念毛伟亚朱龙胜顾吉祥
Owner 江苏燕宁工程科技集团有限公司
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