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Construction method of downthehole impact type triple-pipe high pressure jet grouting pile

A technology of high-pressure rotary grouting piles and construction methods, which is applied to sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of long construction period, high cost, and the need for pilot hole construction, and achieve the effect of shortening the construction period and reducing the cost

Active Publication Date: 2017-11-10
福建建工集团有限责任公司 +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional triple tube high-pressure rotary grouting pile machine has the disadvantage of requiring pilot holes for construction in complex hard strata
The traditional construction method requires lead hole construction in the medium and complex hard stratum, which has a long construction period and high cost

Method used

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  • Construction method of downthehole impact type triple-pipe high pressure jet grouting pile
  • Construction method of downthehole impact type triple-pipe high pressure jet grouting pile
  • Construction method of downthehole impact type triple-pipe high pressure jet grouting pile

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Embodiment Construction

[0057] In order to make the present invention more comprehensible, a preferred embodiment is now described in detail with accompanying drawings as follows.

[0058] Such as figure 1 Shown, the construction method of a kind of down-the-hole impact type triple pipe high-pressure rotary grouting pile of the present invention comprises the following steps:

[0059] Step 1. Construction preparation:

[0060] Clear the obstacles on the construction site and level the construction site. The flatness of the construction site is +100mm or -100mm. Remove the underground obstacles as much as possible so as not to affect the construction efficiency. The elevation is not less than 1000mm, and the width of the working surface of the construction site is not less than 2m. According to the general construction plan and design drawings, the construction plan is prepared, the construction process is determined, and the piling construction flow is arranged;

[0061] And check the integrity of ...

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Abstract

The invention provides a construction method of a downthehole impact type triple-pipe high pressure jet grouting pile. The construction method is characterized by comprising the following steps that (1) construction preparation is made; (2) surveying setting out and stocksewer excavation are carried out; (3) driller presenting of the triple-pipe high pressure jet grouting pile is carried out; (4) hole drilling is carried out; (5) cement paste allocation is carried out; (6) jet grouting promotion is carried out; and (7) washing and movement are carried out. The construction method has the beneficial effects of being good in water stopping effect, low in construction noise, small in vibration, controllable in strengthening scope, capable of shortening the working period, capable of reducing construction cost and the like, and is good in comprehensive benefit.

Description

technical field [0001] The invention relates to a grouting construction method, in particular to a construction method of a submerged-hole impact triple-tube high-pressure rotary grouting pile. Background technique [0002] With the development of urban underground space, the requirements for the effect of water-stop curtains are getting higher and higher during the construction of deep foundation pits. The rotary grouting pile is to use the drilling rig to drill the rotary grouting pipe and nozzle at the design elevation of the pile bottom, pass the pre-prepared grout through the high-pressure generating device to make the liquid flow obtain huge energy, and spray it from the nozzle near the grouting pipe at high speed It will form a liquid flow with highly concentrated energy, which will directly destroy the soil. During the spraying process, the drill pipe will be lifted while rotating, so that the slurry and the soil will be fully stirred and mixed, and a columnar consol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/46
CPCE02D5/46
Inventor 林建洲曾金聪曾庆友陈文玉庄发玉朱金伙梁晓劼黄珠剑余新航林章凯
Owner 福建建工集团有限责任公司
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