Rapid construction method of pipe jacking working well in upper soft and lower hard stratum

A construction method and technology for hard strata, which are used in earth-moving drilling, mining equipment, tunnels, etc., can solve the problems of high hardness of the bedrock layer, high difficulty in excavation, and prolonged construction period, so as to reduce the excavation area and reduce the The difficulty of construction and the effect of shortening the construction period

Active Publication Date: 2018-09-18
CHINA METALLURGICAL CONSTR ENG GRP
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AI Technical Summary

Problems solved by technology

In addition, due to the high hardness of the bedrock layer, the difficulty of excavation is relatively high, and the construction period will be extended accordingly

Method used

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Embodiment Construction

[0018] The present invention will be described in further detail below.

[0019] The rapid construction method for pipe jacking working wells in upper soft and lower hard formations in this specific embodiment comprises the following steps:

[0020] (1) Leveling the site, measuring and setting out to locate the position of the pile hole;

[0021] (2) Use a rotary excavator to drill on the upper soil layer. Every time a certain distance is drilled, the drill bit of the rotary excavator withdraws from the pile hole, and puts the casing into the pile hole to make it fall;

[0022] (3) Step (2) is repeated until the lower bedrock layer is drilled, and the adjacent two casings in the drilled pile hole are spliced ​​together end to end, the lowermost casing is placed on the lower bedrock layer and Multiple casings extend to the drilled pile hole openings, anchoring all casings in the upper soil layer;

[0023] (4) Continue to drill on the lower bedrock layer with the rotary excava...

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PUM

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Abstract

The invention discloses a quick construction method of a pipe jacking working well in an upper soft and lower hard stratum. A site is smoothed, staking out in survey is carried out, the position of apile hole is positioned; a rotary drilling machine is used for drilling in an upper soil layer, every time a certain distance is drilled, a drill head of the rotary drilling machine exits out of the pile hole, and a pile casing is put into the pile hole; the method is repeated until drilling is carried out into a lower base rock layer, and all the pile casings are anchored in the upper soil layer;the rotary drilling machine is continuously used for drilling in the lower base rock layer until drilling is carried out to a specified elevation; transverse excavation is carried out in the hole wall at the bottom of the pile hole to form a pipe jacking operation space, wherein the pipe jacking operation space is provided with an opening into which the pipe jacking to be constructed can enter; ajacking device is installed in the pipe jacking operation space; and at the bottom of the pile hole and at the position of the pipe jacking construction, the lower base rock layer is excavated transversely, and jacking construction is carried out on the pipe jacking through the jacking device. The quick construction method reduces the construction workload, reduces the construction difficulty, shortens the construction period and reduces the impact on the environment.

Description

technical field [0001] The invention relates to the field of construction, in particular to a rapid construction method for pipe-jacking working wells in upper soft and lower hard formations. Background technique [0002] Pipe jacking construction is a non-excavation construction method, and it is a pipeline burying construction technology that does not excavate or excavates less. This technology completely solves the problems of damage to urban buildings and road traffic congestion during pipeline burying construction, and highlights its advantages in terms of stabilizing the soil layer and environmental protection. This is very important for cities with heavy traffic, dense population, numerous ground buildings and complicated underground pipelines. It will create a clean, comfortable and beautiful environment for the city. In the construction environment of the upper soil layer and the lower bedrock layer, according to the conventional construction method, a foundation p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/10
CPCE21D9/001E21D9/10
Inventor 隆小华李明亮冉顶
Owner CHINA METALLURGICAL CONSTR ENG GRP
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