Construction method of shield tunneling under buildings

By reinforcing the surrounding strata with pre-embedded sleeve valves and grouting before the tunnel boring machine (TBM) arrives, and adjusting the TBM parameters, the TBM can pass through at a uniform speed, thus solving the problems of interrupted piles, ground settlement, and building tilting during TBM construction and ensuring construction safety.

CN115961960BActive Publication Date: 2026-06-23CHINA RAILWAY 20TH BUREAU GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY 20TH BUREAU GROUP CO LTD
Filing Date
2022-10-25
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

During tunnel boring machine (TBM) construction, especially when tunneling under buildings in silty soil, problems such as broken piles, uneven ground settlement, building tilting, and collapse are prone to occur.

Method used

Before the tunnel boring machine (TBM) arrives, the surrounding strata are reinforced with pre-embedded sleeve valves and/or grouting. The TBM parameters are adjusted to ensure a uniform speed. During the TBM's passage under the building, the surrounding strata are reinforced with grouting. The pressure of the slurry chamber is controlled. The TBM exits the tail section for lining construction and construction monitoring is conducted to adjust the progress.

Benefits of technology

It improved the reinforcement effect around the building, reduced pile breakage, controlled ground settlement and building tilt, and ensured construction safety.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN115961960B_ABST
    Figure CN115961960B_ABST
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Abstract

The application discloses a construction method of shield tunneling under buildings, which comprises the following steps: before the shield machine reaches the buildings, the ground around the buildings is reinforced by pre-buried sleeve valve pipes and / or grouting; the parameters of the shield machine are adjusted so that the shield machine continuously and uniformly passes through the buildings; during the process of the shield machine tunneling under the buildings, the ground around the shield machine is grouted and reinforced, and the ground at the tail of the shield machine is subjected to lining construction; if the shield machine passes through a sludge layer, mud is injected in the radial direction to balance the shield, and the pressure of the sludge tank is controlled to avoid sludge flowing in; the ground around the tail of the shield machine is subjected to lining construction to form a tunnel; and the buildings are subjected to construction monitoring, including inclination monitoring, vertical settlement monitoring, crack monitoring and surrounding surface settlement profile monitoring. According to the technical scheme, the shield machine continuously and uniformly passes through the buildings, which can effectively reduce the phenomenon of broken piles, ground uneven settlement, building inclination and collapse.
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