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Construction method for drilling and pile forming of hydraulic down-the-hole hammer

A construction method and technology of down-the-hole hammer, which are applied to drilling equipment and methods, sheet pile walls, drilling equipment, etc., can solve problems such as not being able to play their advantages well, save time for repeated dismantling and layout, and ensure construction. Efficiency, the effect of improving construction efficiency

Pending Publication Date: 2022-04-08
BEIJING ZHONGYAN DADI TECH CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydraulic down-the-hole hammer technology is suitable for drilling into piles in strongly weathered rock formations, but when the upper part of the strongly weathered rock formation is covered with a soft soil layer, the direct use of the hydraulic down-the-hole hammer method cannot give full play to its advantages

Method used

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  • Construction method for drilling and pile forming of hydraulic down-the-hole hammer

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Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a construction method of hydraulic DTH hammer drilling into piles is based on the mud wall drilling rig, hydraulic DTH hammer and its supporting pipeline system and slurry circulation system. The following steps are used to efficiently carry out deep drilling operations and form a drill Construction method of cast-in-place pile:

[0027] Step 1: Make holes in the mud retaining wall;

[0028] Use rotary excavation or reverse circulation or positive circulation mud retaining technology to drill holes into strongly weathered rock formations or moderately weathered rock formations, and the mud retaining wall drilling equipment will be displaced;

[0029] Step 2: Hydraulic DTH hammer pipeline layout;

[0030] The hydraulic down-the-hole hammer drilling rig is in place, and the slurry return pipeline, mud pool, hydraulic down-the-hole hammer drilling rig, slurry discharge pipeline, and slag remover are arranged in sequence, and the slag remover is...

Embodiment 2

[0041] In the working condition, the upper 20m soil layer is a clay layer or a sand layer, and the following 20m is a strong weathered rock layer, and the design pile length is 25m. Adopt the technical scheme introduced by the present invention to carry out the following construction:

[0042] Such as figure 1 As shown, based on the mud protection drilling rig, hydraulic down-the-hole hammer and its supporting pipeline system and slurry circulation system, the construction method of forming bored piles is as follows:

[0043] Step 1: Make holes in the mud retaining wall;

[0044] The rotary drilling process is used to drill into the strong weathered rock formation at a distance of 20m, and the rotary drilling rig is displaced;

[0045] Step 2: Hydraulic DTH hammer pipeline layout;

[0046] The hydraulic down-the-hole hammer drilling rig is in place, and the slurry return pipeline, mud pool, hydraulic down-the-hole hammer drilling rig, slurry discharge pipeline, and slag remo...

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Abstract

The invention discloses a construction method for drilling and pile forming of a hydraulic down-the-hole hammer, and belongs to the technical field of pile foundation construction in geotechnical engineering. Based on a slurry retaining wall drilling machine, a hydraulic down-the-hole hammer and a matched pipeline system and slurry circulating system, the construction method for efficiently carrying out deep drilling operation and forming the cast-in-situ bored pile comprises the following steps that slurry retaining wall hole forming is carried out; arranging a hydraulic down-the-hole hammer pipeline; installing a hydraulic down-the-hole hammer drilling machine; performing hydraulic down-the-hole hammer construction operation; and the cast-in-situ bored pile construction is completed. Holes are formed in the soft soil layer on the upper portion of the stratum through the slurry wall protecting method, when drilling is conducted to the strongly-weathered rock stratum or the moderately-weathered rock stratum, construction is conducted through the hydraulic down-the-hole hammer method, the hydraulic down-the-hole hammer is combined with the slurry wall protecting method, and therefore construction efficiency and quality are guaranteed.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction in geotechnical engineering, in particular to a construction method for drilling piles with a hydraulic down-the-hole hammer. Background technique [0002] Hydraulic down-the-hole hammer technology is an engineering construction method suitable for drilling into piles in strongly weathered rock formations. Hydraulic down-the-hole hammer drilling rigs are used to drill holes, and mud reverse circulation is used to clean up sediment. [0003] With the increase of national infrastructure, especially in the construction of a large number of highways, high-rise buildings, and large bridges, several pile foundation projects are involved, and our country has a vast land area, and there are various strata, among which strong weathered rock is more common. A kind of rock stratum, especially in the southeast coastal area, the stratum is usually a relatively soft soil layer on the upper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/34E21B7/00E21B21/00
Inventor 李建平宋伟杰朱庆凯麻学博刘光磊武思宇
Owner BEIJING ZHONGYAN DADI TECH CO LTD
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