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Construction method of ultra-shallow buried tunnel under shield tunneling through existing pipeline

A technology of tunnel shield and construction method, which is applied in tunnels, earth-moving drilling, mining equipment, etc., to achieve the effect of controlling land subsidence and reasonable parameters

Active Publication Date: 2020-06-02
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, many scholars have also conducted a lot of research on the settlement law in the tunnel construction process, but there are relatively few studies on how to reduce or even avoid construction settlement deformation during tunnel shield construction in the soft strata along the southeast coast

Method used

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  • Construction method of ultra-shallow buried tunnel under shield tunneling through existing pipeline
  • Construction method of ultra-shallow buried tunnel under shield tunneling through existing pipeline
  • Construction method of ultra-shallow buried tunnel under shield tunneling through existing pipeline

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Experimental program
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Effect test

Embodiment

[0052]The present invention is based on the background of the construction of the Gongbei-Hengqin section of the tunnel between Zhuhai City and Zhuhai Airport Intercity Rail Transit Project, which passes through the water supply pipes for Australia. The pre-piercing construction test was carried out, and the settlement was monitored in real time to determine the optimal grouting parameters and tunneling parameters. Then, according to these parameters, the shield tunneling construction of the water supply pipeline under the water supply to Australia was carried out. During the whole process, a set of ultra-shallow buried Deformation control technology for shield tunnel passing through existing pipeline construction.

[0053] The newly built Zhuhai urban area to Zhuhai Airport intercity rail transit project Gongbei-Hengqin section shield tunnel passes through the water supply pipe for Australia. The surrounding rock of the tunnel is weak soil layer, and the concrete water pipe fo...

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Abstract

The invention relates to a construction method for penetrating an existing pipeline below a super shallow buried tunnel shield. The construction method is characterized by including: constructing according to local settlement control standards, pre-penetrating experiment grouting parameters and construction tunneling parameters, namely reinforcing the ground surface of the existing pipeline, arranging monitoring point locations, and conducting a pre-penetrating pipeline construction experiment, wherein the pre-penetrating experiment is conducted in two steps, including step 1, conducting the pre-penetrating experiment when a notch ring reaches 73-75 rings of the pipeline to acquire reasonable grouting parameters and tunneling parameters, and step 2, conducting the pre-penetrating experiment when the notch ring reaches 76-78 rings of the pipeline to re-optimize acquired parameters to enable the same to be more reasonable; grouting before the experiment is proceeded each time.

Description

technical field [0001] The invention relates to a construction method for an ultra-shallow buried tunnel passing through an existing pipeline under a shield. Background technique [0002] With the increasing development of my country's economy, the population of large and medium-sized cities is increasing, and the traffic pressure within the city is also increasing. my country's high-speed rail network has basically met the current domestic passenger flow needs. The country's next development plan will It is the construction of urban rail transit. At present, large cities such as Beijing, Guangzhou, Shanghai, and Shenzhen have built a large number of urban rail transit lines, and some second-tier provincial capital cities such as Shijiazhuang, Taiyuan, and Harbin have also begun to plan and build subways. The subway is the window of a city. It is safe, punctual, humanistic, and technological. It plays an irreplaceable role in effectively relieving the traffic pressure in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D9/06E21D9/08
CPCE21D9/001E21D9/003E21D9/0607E21D9/08
Inventor 岳祖润杨志浩孙铁成张松孙鑫
Owner SHIJIAZHUANG TIEDAO UNIV
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