Construction method using long spiral drilling and wall protection for construction of soil squeezing pile

A technology of long auger drilling, construction method, applied in the direction of sheet pile wall, foundation structure engineering, construction, etc., to achieve the effect of reducing the strength of soil mass

Pending Publication Date: 2021-06-22
曹兴明
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a long helical drilled hole retaining wall for the construction method of the soil-squeezing pile, to solve the problem that the pile can reach the final pressure value or hammer penetration according to the design requirements, but not affect the design elevation, and to solve how to reduce the strength of the soil Without affecting the side friction resistance and end resistance of the pile, the pile can be hammered or pressed to the design elevation smoothly

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  • Construction method using long spiral drilling and wall protection for construction of soil squeezing pile

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Embodiment

[0015] The long auger drilling retaining wall is used in the construction method of the soil squeezing pile. Before the construction of the soil squeezing pile, the long auger drilling machine is used to drill holes. The diameter of the drilling hole is smaller than the design diameter of the pile. The thickness of the reserved bearing layer is determined according to the strength of the soil. , Generally, the soil layer of cohesive soil should not be less than 2d (d is the diameter of the pile), sandy soil should not be less than 1.5d, and gravel soil should not be less than 1d. When the strength of the soil layer is relatively high, the reserved soil layer is relatively thin, and the state of the original soil layer used in the design of the pile side and pile tip without disturbing the pile shall prevail. Please refer to figure 1 . The construction sequence is:

[0016] 1. The drilling rig is in place;

[0017] 2. Drill forward to the thickness of the reserved pile side a...

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Abstract

The invention discloses a construction method using long spiral drilling and wall protection for construction of a soil squeezing pile. The method utilizes the characteristic that forward and reverse rotation soil returning directions of a spiral blade of a drilling machine are opposite, drilling is stopped after forward rotation drilling upwards returns part of residual soil to a preset depth, the drill is lifted in a reverse rotation mode, loose soil on a drill rod fills back into a hole for wall protection, and then a soil squeezing pile is constructed. The method has the advantages that the method is simple and practicable, the side friction resistance and the end resistance of the pile can be guaranteed, construction can be achieved by utilizing a common long spiral drilling machine, the method is simple and practicable, convenient to popularize, low in cost and wide in market prospect, and the blank of soil squeezing pile construction is filled up.

Description

technical field [0001] The invention relates to the field of construction methods of soil-squeezing piles, and in particular relates to a construction method for long auger drilled hole retaining walls used for soil-squeezing piles. Background technique [0002] At present, there is a soil-squeezing pile technology used in the construction market called "half-screw pile and its pile-forming method" patent number: ZL031128265.2, which is named as the soil-squeezing pile according to the "Technical Specifications for Building Pile Foundations". The problems in this invention are: When the hard soil layer cannot be drilled, and the depth required by the design cannot be reached, the long auger drilling machine is usually used to drill holes first, and the part with higher soil strength is taken out for half-screw pile construction. The disadvantages of this method are: Two points: 1. The side frictional resistance (higher) calculated according to the soil-squeezing pile during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/22
CPCE02D5/22
Inventor 王吉良贾君童修富王宇孙权姜曦曹兴明曹宇崔伟婷
Owner 曹兴明
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