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High-pressure jet grouting foundation construction technique

A technology of high-pressure spraying and construction technology, which is applied in the direction of infrastructure engineering, construction, sheet pile walls, etc., can solve the problem of low cutting efficiency and achieve the effect of improving efficiency

Active Publication Date: 2018-12-11
佛山市房建集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the cutting process of soil depends solely on the cutting force of cement slurry fluid, its cutting efficiency is low

Method used

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  • High-pressure jet grouting foundation construction technique
  • High-pressure jet grouting foundation construction technique
  • High-pressure jet grouting foundation construction technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-pressure jet grouting foundation construction process, comprising the following steps:

[0032] (1) Drill holes at the corresponding pile positions, such as figure 1 As shown, use a drill rig 1 or a vibratory pile driver to drill holes until the depth of the pile hole 2 reaches the predetermined requirement;

[0033] (2) Insert the casing 3 with the cutting block 33 at the bottom into the pile hole 2 to the predetermined position, such as figure 2 As shown, the cutting block 33 is fixed on the outer wall of the bottom end of the casing 3, and extends radially outward, as Figure 4 As shown, one or more cutting blocks 33 can be provided, and as the number of cutting blocks 33 increases, the cutting effect during the rotation of casing 3 can be increased; there are multiple ways for casing 3 to be inserted into pile hole 2, One of them is to drive the sleeve pipe 3 with the cutting block 33 into the pile hole 2 by a vibrating pile driver. At this time, the cutti...

Embodiment 2

[0039] Compared with Embodiment 1, this embodiment adopts a different casing 3, in which the cutting block 33 can be retracted, and when inserting the casing 3 into the pile hole 2, it can be directly inserted into the pile hole without using other equipment 2 in.

[0040] Such as Figure 5 As shown, the casing 3 includes a tubular body 31 and a movable ring 32, and the movable ring 32 is rotationally connected to the tubular body 31. Specifically, the movable ring 32 is sleeved on the lower end of the tubular body 31, and the movable ring 32 is located at the bottom end of the tubular body 31. In order to realize the relative rotation between the movable ring 32 and the pipe body 31 . An anti-slip ring 34 is sleeved on the movable ring 32, and the anti-slip ring 34 can be made of rubber material. Through the elasticity of the rubber material, the process of inserting the sleeve pipe 3 into the pile hole 2 will not increase too much resistance.

[0041] Such as Figure 6 As...

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Abstract

The invention discloses a high-pressure jet grouting foundation construction technique, characterized by comprising the steps of (1) drilling in a corresponding pile position, and using a drill rig ora vibratory piledriver to drill a hole; (2) inserting a casing having a cutting block at the bottom end into the hole to a predetermined position; (3) inserting a triple tube into the casing; (4) controlling the triple tube and the casing to rise while rotating, lifting the casing and the triple tube synchronously until a rotary-jet-grouted pile is constructed; (5) moving to a next pile position.Before rotary jet grouting of the triple tube, the wall of the hole is cut first with the cutting block; therefore, rotary jet grouting efficiency can be improved.

Description

technical field [0001] The invention relates to a construction technology, in particular to a high-pressure jet grouting foundation construction technology. Background technique [0002] The high-pressure jet grouting foundation, also known as the rotary grouting pile foundation, uses a high-pressure pump to spray the cement slurry through the special nozzle at the end of the drill pipe, and sprays it into the soil at a high speed level, and cuts the soil layer with the impact of the liquid. The speed rotates at a certain speed, and the ground speed rises slowly on one side, so that the soil and cement slurry are fully mixed and solidified, forming a cylindrical solid body with a certain strength, so that the foundation is reinforced. [0003] According to the engineering situation and the specific conditions of the machine body, the rotary grouting pile can adopt three types: single pipe method, double pipe method and triple pipe method, and the single pipe method and tripl...

Claims

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Application Information

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IPC IPC(8): E02D5/46
CPCE02D5/46E02D2250/003
Inventor 何景辉黄志浩
Owner 佛山市房建集团有限公司
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