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Novel steel sleeve device for cast-in-situ bored pile construction

A technology of bored cast-in-place piles and steel casings, which can be used in sheet pile walls, foundation structure engineering, construction, etc., and can solve problems such as great influence on bearing capacity

Inactive Publication Date: 2020-12-22
TONGJI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another problem is that the construction quality of the casing method has a great influence on the bearing capacity of the pile, so how to improve the bonding force between the casing and concrete is also worth studying

Method used

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  • Novel steel sleeve device for cast-in-situ bored pile construction
  • Novel steel sleeve device for cast-in-situ bored pile construction

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Embodiment

[0024] Such as figure 1 , 2 As shown, a novel steel casing device for bored pile construction, the device includes a plurality of sequentially socketed steel casing 1 ( figure 1 , 2 Only one steel casing 1), at least one water injection pipe 3 (two water injection pipes 3 are provided in this embodiment and distributed symmetrically), multiple drill bits 7, pressure relief hole baffle plate 6, The water injection pipe protection pipe 4, the upper and lower ends of the steel casing 1 are open, the axial length of the steel casing 1 is 2.0-2.4m, preferably 2.0m, the outer diameter is 0.8-1.2m, preferably 1.0m, and the wall thickness 15-17mm, preferably 16mm, made of high-strength steel (such as Q460 steel). On the outer wall of the pipe 1, the width of the casing lap plate 2 (the direction of the width is parallel to the axis of the steel casing 1) is 20cm, which is divided into two parts on average, the 10cm width of the upper part and the upper steel casing The 10cm part o...

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Abstract

The invention relates to a novel steel sleeve device for cast-in-situ bored pile construction. The device comprises a plurality of steel sleeves (1) which are sequentially sleeved, at least one waterinjection pipe (3) and a plurality of drill bits (7), wherein the at least one water injection pipe (3) is vertically arranged on the outer side walls of the steel sleeves (1), and the plurality of drill bits (7) are arranged on the outer side wall of the bottommost steel sleeve (1) in the circumferential direction and extend downwards. Compared with the prior art, the device has the characteristics that the structure is simple, disturbance of construction to the surrounding environment is reduced, and the construction efficiency is high.

Description

technical field [0001] The invention belongs to the field of bored pile construction, and in particular relates to a novel steel casing device for bored pile construction. Background technique [0002] Bored cast-in-situ pile refers to the pile hole formed in the foundation soil by means of mechanical drilling, steel pipe extrusion or manual excavation on the project site, and a steel cage is placed in it and concrete is poured into the pile. Different, cast-in-place piles can be divided into several categories such as immersed pipe cast-in-place piles, bored cast-in-place piles and bored cast-in-place piles. The construction method of bored piles mainly adopts the mud retaining method, and the prepared mud is used to fill and support the drilled holes to avoid the occurrence of hole collapse. After the drilling is completed, the holes are cleared and the concrete is poured. The construction of the mud retaining method has a great disturbance to the stratum, including the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/68E02D5/34
CPCE02D5/34E02D5/68
Inventor 陕耀赵洪峰徐建华谢松刘唐山黄俊陈平亓立志
Owner TONGJI UNIV
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