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Construction Technology of Ultra-long Pneumatic Down-the-hole Hammer Vibrating Rotary Grouting Pile

A construction technology and a technology of rotary jetting piles, which are used in infrastructure engineering, driving devices for drilling in wellbore, drilling equipment, etc., to achieve the effect of cost reduction

Active Publication Date: 2017-12-15
北京建材地质工程有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But when the pile length exceeds 29m, the current domestic long auger drilling rig is powerless

Method used

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  • Construction Technology of Ultra-long Pneumatic Down-the-hole Hammer Vibrating Rotary Grouting Pile
  • Construction Technology of Ultra-long Pneumatic Down-the-hole Hammer Vibrating Rotary Grouting Pile
  • Construction Technology of Ultra-long Pneumatic Down-the-hole Hammer Vibrating Rotary Grouting Pile

Examples

Experimental program
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specific Embodiment

[0030] The following is a detailed description of the specific examples of the reinforcement of the ultra-long rock formation with the wind-driven down-the-hole hammer vibration jet grouting pile in the passive area of ​​the 1-1 section on the north side of the C2 commercial and financial project of the K block of the Yinhe Business District in Shijingshan District, Beijing:

[0031] 1. Project overview:

[0032] Beijing Shijingshan District Yinhe Business District K Lot C2 Commercial Finance Project is located on the west side of Yinhe Street and north side of Lugu Road in Shijingshan District, Beijing. The proposed project consists of office buildings, podiums and underground garages. The basic overview of the project is shown in Table 1.

[0033] proposed building

name

Number of floors (above ground /

underground)

maximum building height

degree (m)

superstructure

Types of

It is estimated that the foundation will be buried

depth(m)...

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Abstract

The invention discloses a construction process for a super-long vibration jet-grouting pile of a pneumatic down-the-hole hammer, and equipment thereof. The construction process comprises the following steps: (1) drilling: holing and drilling by an improved SL400 multifunctional water well drilling rig by virtue of low-pressure water and high-pressure wind, and once one section of a drill rod is drilled, detaching the section of the drill rod and installing the next section of the drill rod until a hole depth achieves a design pile bottom elevation; (2) cement slurry jet-grouting: starting to switch to high-pressure slurry and high-pressure wind jet-grouting upward lifting, and once one section of the drill rod is lifted upwards, detaching the section of the drill rod and then lifting the next section of the drill rod until the next section of the drill rod is lifted to the earth surface, thus forming a large-diameter cement jet-grouting pile body. The construction process disclosed by the invention has the following advantages: the construction speed and grouting quality can both be ensured, and the shortages of the prior art are overcome; the cost is greatly reduced; and environmental protection and conservation are achieved, thus the great superiority of the construction process is shown.

Description

technical field [0001] The invention relates to a construction technique and equipment for an ultra-long pneumatic down-the-hole hammer vibrating rotary grouting pile, which belongs to the field of building foundation construction and is mainly used for pile-forming construction of high-pressure grouting piles, water-stop curtain piles, and the like. Background technique [0002] Cement-soil mixing piles are widely used in the fields of foundation pit support, water-stop curtain and foundation treatment because of their simple construction and low cost. Restrictions, especially stirring sand layers, sand pebble layers, and rock layers cannot be implemented. Although cement-soil rotary grouting piles (including single-pipe, double-pipe and triple-pipe) have been successfully applied in the fields of foundation pit support, water-stop curtain and foundation treatment in soft soil areas, they are also subject to extreme pressure when constructing hard soil layers. Large restri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D15/04E21B4/14
CPCE02D15/04E21B4/14
Inventor 何世鸣苑占武李江田震远赵长春周与诚张明中陈辉司呈庆梁成华贾城郁河坤王建明黄鑫峰李长生冯成勇王海宁洪伟陈鹏郭跃龙
Owner 北京建材地质工程有限公司
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