Wall protecting device for cast-in-situ bored pile and working method

A technology of bored cast-in-place piles and casings, which is applied in excavation, foundation structure engineering, construction, etc. It can solve problems such as insufficient mud wall protection effect, prolonged construction period, and environmental pollution, so as to improve construction efficiency and construction quality, and reduce engineering costs. Construction cost, effect of reducing engineering cost

Active Publication Date: 2022-03-11
SHANDONG LUQIAO GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor found that the existing construction technology has many defects. The drilling of mud wall protection needs to prepare a certain amount of mud in advance, which will cause certain environmental pollution during the construction process. At the same time, the effect of mud wall protection is also insufficient, and there is also a certain problem of hole wall collapse. ; The construction process of pre-embedded steel casing needs to drive the steel casing into the soil foundation in advance, which will result in a longer construction period and an increase in cost during the construction process

Method used

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  • Wall protecting device for cast-in-situ bored pile and working method
  • Wall protecting device for cast-in-situ bored pile and working method
  • Wall protecting device for cast-in-situ bored pile and working method

Examples

Experimental program
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Effect test

Embodiment 1

[0075] The bored pile hole is 30m deep, the pile hole diameter is 1.5m (the pile hole circumference is about 4.7m), and the geological conditions are the soil structure in the northern Anhui Plain. The depth of the steel casing is 3m, the ground is 1m higher, and the depth of the pre-embedded steel casing is 2m; the flat length of the second casing is 5.2m, and the height is 2.6m. The entire wall construction uses 10 sections of the second casing, and there is sediment at the bottom of the pile hole , leaving a height of 2m at the bottom without supporting the second casing.

[0076] During construction, the guide rail is first installed on the second casing, and the locking buckle is welded to the corresponding position of the elastic steel hoop; as the depth of the pile hole (drilling) increases, the second casing is supported while drilling. A section of the second casing is bent around the drill pipe on the pile foundation surface to form a cylinder with a diameter of 1.2m...

Embodiment 2

[0079] The bored pile hole is 40m deep, the pile hole diameter is 1.8m (the pile hole circumference is about 5.7m), and the geological conditions are the soil structure in the northern Anhui Plain. The depth of the steel casing is 3m, the ground is 1m higher, and the depth of the pre-embedded steel casing is 2m; the second casing has a flat length of 6.2m and a height of 3.0m. The entire wall construction uses 12 second casings, and there is sediment at the bottom of the pile hole , leaving a height of 2m at the bottom without supporting the second casing.

[0080]During construction, first install the guide rail on the second casing, and weld the locking buckle to the corresponding position of the elastic steel hoop; as the drilling depth increases, carry out the operation of supporting the second casing while drilling, and insert the first section and the second casing. The casing is bent around the drill pipe on the pile foundation surface to form a cylinder, the diameter o...

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Abstract

The invention discloses a wall protection device for a cast-in-situ bored pile and a working method, solves the problems that in the prior art, a slurry wall protection is prone to collapse, and the construction period of a pre-embedded steel casing is long, and has the beneficial effects that rapid construction of hole protection of the cast-in-situ bored pile is achieved, and manpower and construction time are saved. According to the specific scheme, the wall protecting device for the cast-in-situ bored pile comprises a first pile casing, a second pile casing is arranged in the first pile casing, the first pile casing is pre-buried and fixed to the ground at the top end of a pile hole, the lower half section of the first pile casing penetrates into the pile hole, the second pile casing comprises multiple sections, and the inner diameter of the second pile casing can be adjusted under the action of external force; and each section of the second pile casing can be connected with the first pile casing or the previous section of the second pile casing in a clamping manner.

Description

technical field [0001] The invention relates to the field of building and bridge engineering pile foundation construction, in particular to a wall protection device and working method for bored cast-in-place piles. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In construction and bridge engineering, the construction of bored piles is widely used, and the drilling process in the construction of bored piles is an important construction process. When bored cast-in-place piles are drilled, hole wall collapse is an important engineering defect. In the construction of existing bored cast-in-place piles, mud retaining wall drilling or pre-embedded steel casing construction techniques are mainly used. [0004] The inventor found that the existing construction technology has many defects. The drilling of mud wall protection needs to prepare a ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/08
CPCE02D17/08E02D2300/0026E02D2300/0034E02D2300/0001E02D2200/146
Inventor 吴式乾李龙张苛汪鹤姚伟许展飞王均胜朱静伟程翼魏光亮
Owner SHANDONG LUQIAO GROUP
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