Construction method for earth pressure balance shield to penetrate through composite stratum
An earth pressure balance shield and composite stratum technology, applied in earthwork drilling, underground chamber, wellbore lining, etc., can solve problems such as construction difficulties, cracks in water storage structures, water flow infiltration, etc. Stability, vibration reduction effect
Pending Publication Date: 2022-02-18
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP +1
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Problems solved by technology
[0004] The above-mentioned existing technical solutions have the following defects: when using the above-mentioned construction method for construction, when encountering water storage structures such as groundwater layers or reservoirs, during the construction blasting and shield tunneling, the underground The vibration of the soil layer can easily lead to cracks in the water storage structure, resulting in water infiltration, which brings great difficulties to the construction, so it needs to be improved
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[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0039] refer to figure 1 , which is a construction method for an earth pressure balance shield passing through a composite stratum disclosed in the present invention, comprising the following steps:
[0040] S01, preliminary preparation:
[0041] Find out the specific location of the water storage structure, determine the relative positional relationship between the water storage structure and the shield tunnel, and draw the outer contour of the shield tunneling route with red paint on the ground, so as to determine the distribution of subsequent drilling holes At the same time, the drilling direction control line is set along the shield tunneling direction at the center line of the outer contour line on the ground, so as to guide the drilling direction for the staff and facilitate subsequent drilling; the underground soil layer is detected by geological dri...
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The invention relates to a construction method for an earth pressure balance shield to pass through a composite stratum, which comprises the following steps of: S01, early-stage preparation is carried out: the specific position of a water storage structure is ascertained, and the relative position relationship between the water storage structure and a shield tunnel is determined; S02, underground drilling is carried out: specifically, after the relative position of the water storage structure and the shield tunneling route is determined, the distribution position of blast holes is firstly determined beyond the safe distance from the edge of the water storage structure, and then drilling is carried out on the ground; S03, deep hole blasting is conducted, specifically, after drilling is completed, deep hole blasting is conducted, and after blasting is completed, blast holes are sealed with cement mortar; S04, ground reinforcement is conducted, specifically, after blasting is completed, grouting reinforcement is conducted on the ground; and S05, shield tunneling is conducted, specifically, a shield tunneling machine is controlled to penetrate through the water storage structure with appropriate shield parameters. The method has the effect of conveniently penetrating through water storage structures such as a reservoir to reduce water flow permeation.
Description
technical field [0001] The invention relates to the technical field of underground engineering construction, in particular to a construction method for an earth pressure balance shield tunneling through a composite stratum. Background technique [0002] At present, in underground engineering construction, encountering boulders during the excavation of the shield machine often leads to a sudden increase in the pressure at the front end of the cutterhead, which is easy to jam the cutterhead, wear the cutter, and severely deform the cutter seat. Therefore, how to ensure the shield machine Safe, effective and fast passage through the boulder area has been a research topic in the development of underground space. [0003] The existing Chinese patent with authorized publication number CN110513114A provides a construction method for shield tunneling through high-strength boulder groups, including the following steps: Step 1: do geological exploration in advance according to the rou...
Claims
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IPC IPC(8): E21D9/00E21D9/08E21D11/10
CPCE21D9/00E21D9/001E21D9/006E21D9/08E21D11/10
Inventor 赵勋三靳建民杨培健丁志恒郭庆飞孙策张君
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP