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A construction method of inclined steel pipe combined with cement and soil to form a force-bearing body

A construction method and cement-soil technology, which can be applied in basic structure engineering, construction, sheet pile walls, etc., can solve the problems of reduced bearing capacity of stressed bodies, difficulty in forming cement-soil enlarged bodies, and filling, etc., and achieve a simple and fast construction method. Effect

Active Publication Date: 2018-11-30
SHANGHAI CHANGKAI GEOTECHN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Sometimes oblique steel pipe cement-soil bearing body is used in engineering, but when the oblique steel pipe is constructed by conventional methods, after the steel pipe is obliquely inserted into the soil at a certain angle to a predetermined depth, the grout for bottom grouting is due to the oblique direction of the steel pipe. The reason is that it is often impossible to fill around the steel pipe around it, and it is difficult to form a uniform cement-soil expansion body, which greatly reduces the bearing capacity of the formed force-bearing body.

Method used

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  • A construction method of inclined steel pipe combined with cement and soil to form a force-bearing body
  • A construction method of inclined steel pipe combined with cement and soil to form a force-bearing body
  • A construction method of inclined steel pipe combined with cement and soil to form a force-bearing body

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Embodiment 1

[0022] Embodiment 1: This embodiment specifically relates to a construction method in which an inclined steel pipe is combined with cement and soil to form a force-receiving body. The construction method includes the following steps:

[0023] (1) if figure 1 As shown, the drilling rig 1 is moved to the position to be constructed. The drilling rig 1 is a mixing pile drilling rig. Adjust the inclination angle between the drill pipe 2 and the ground to meet the design requirements; after the angle adjustment is completed, start the drill pipe 2 to move into the soil Oblique drilling into the hole;

[0024] (2) if figure 1 As shown, after the mixing head 3 at the front end of the drill pipe 2 is drilled to the design depth, the drill pipe 2 continues to drill for a certain distance, and at the same time, the cement slurry is sprayed outward through the mixing head 3, and the cement slurry is mixed with the stirring head 3 The mud is mixed to form an obliquely uniform cement-soil...

Embodiment 2

[0028] Embodiment 2: as figure 2 As shown, this embodiment specifically relates to a construction method in which inclined steel pipes are combined with cement and soil to form a force-receiving body. Corresponding spray holes are distributed on the drill bit at the end of the rod 2. When the drill rod 2 is drilled to the design depth in the soil, the end of the drill rod 2 starts to spray cement slurry, that is, high-pressure rotary jet drilling, so that the cement slurry It is mixed with the mud to form a section of cement-soil expansion body 4 with uniform oblique direction, and the diameter of the cement-soil expansion body 4 is greater than the diameter of the borehole.

[0029] The construction methods of the remaining steps in this embodiment are the same as those described in Embodiment 1, so they will not be repeated here.

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Abstract

The invention discloses a construction method for forming a force body by combining an oblique steel pipe with cemented soil. The construction method comprises the following steps that a drilling machine is started, a drill rod drills into a soil body obliquely for hole forming, after specified depth is reached, the drill rod continues drilling, cement grout is jetted, and thus a segment of cemented soil enlarged body is formed; the drill rod is lifted away from a drilled hole, then the steel pipe is inserted into the cemented soil enlarged body along the drilled hole, and a plurality of grouting holes are distributed in the contact face of the end of the steel pipe and the cemented soil enlarged body; and supplementary grouting is conducted into the cemented soil enlarged body through the grouting holes in the steel pipe, and thus the steel pipe and the cemented soil enlarged body form an integrated structure. The construction method has the advantages that through oblique drilling of the drill rod and grout jetting, the uniform-size cemented soil enlarged body can be formed, the after-inserted steel pipe and the cemented soil enlarged body form stable connection through supplementary grouting, barb-shaped angle iron protection parts on the pipe wall and short ribs, and thus the integrated structure with high bearing capacity is formed.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a construction method in which inclined steel pipes are combined with cement and soil to form a force-bearing body. Background technique [0002] The force body formed by steel pipe combined with cement soil is widely used in the field of construction engineering. The construction method is generally to insert the steel pipe into the soil to a predetermined depth, and then inject a certain amount of cement slurry at the bottom of the steel pipe, which forms a certain range at the bottom of the steel pipe. Cement-soil expansion body, and then form a steel pipe cement-soil force body with a certain bearing capacity. [0003] Sometimes oblique steel pipe cement-soil bearing body is used in engineering, but when the oblique steel pipe is constructed by conventional methods, after the steel pipe is obliquely inserted into the soil at a certain angle to a p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/44
CPCE02D5/44
Inventor 顾国荣郭星宇陈晖王克文王笑徐丹郭俊杰
Owner SHANGHAI CHANGKAI GEOTECHN ENG