Research on Transversal Settlement Characteristics of Strata Caused by Large Diameter in Shield Tunneling Slurry Pressure Balance

WANG Jian; PAN Hong; LUO Guanyong; CAO Hong

doi:10.3724/j.gyjzG23073101

Volume 54 Issue 4

Apr. 2024

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2024 > 54(4): 158-165

TONG Xiaochao. EXPERIMENTAL RESEARCH ON INSTALLATION PERFORMANCE OF ANCHOR CHANNELS[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(2): 124-129. doi: 10.13204/j.gyjz202002019

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WANG Jian, PAN Hong, LUO Guanyong, CAO Hong. Research on Transversal Settlement Characteristics of Strata Caused by Large Diameter in Shield Tunneling Slurry Pressure Balance[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(4): 158-165. doi: 10.3724/j.gyjzG23073101

TONG Xiaochao. EXPERIMENTAL RESEARCH ON INSTALLATION PERFORMANCE OF ANCHOR CHANNELS[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(2): 124-129. doi: 10.13204/j.gyjz202002019

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Research on Transversal Settlement Characteristics of Strata Caused by Large Diameter in Shield Tunneling Slurry Pressure Balance

doi: 10.3724/j.gyjzG23073101

1. Guangdong Yihua Transportation Engineering Testing Co., Ltd., Zhongshan 528455, China;
2. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China

Received Date: 2023-07-31
Available Online: 2024-05-29

Abstract

Abstract

Based on on-site measured long-term soil settlement data, the Peck empirical formula was used to study the shape, width coefficient and influence range of transversal settlement troughs of ground and deep strata. The results showed that: 1) The long-term settlement of strata caused by shield tunneling, whether it was transversal settlement of ground or deep stratum settlement, conformed to the Gaussian distribution. Affected by the consolidation of disturbed soil, the settlement trough gradually deepened and widened. 2) From the perspective of ground settlement, the transversal settlement caused by shield tunneling construction was in a range of 1.4 times tunnel diameters, which would increase to a range of 2.3 times tunnel diameters due to long-term consolidation of soil. For the deep stratum settlement (buried at a depth of 12.1 m), the affected range by shield tunneling was 0.8 times of tunnel diameters, and over time, the affected range would expand to a range of 1.2 times tunnel diameters. The affected range by shield tunneling in the deep stratum was smaller than that in the ground. 3) The settlement width coefficients of the ground and deep stratum conformed to an exponential distribution with the time of disengagement of the shield tail from the measured cross-section, and leveled off eventually. However, the growth rate and amount of the width coefficient of ground settlement troughs were greater than those of deep soil. 4) The transveral settlement curve the of deep stratum was steep, while the transversal settlement curve of the ground was relatively flat. The curvature of the transversal settlement curve of the deep stratum was larger and more concentrated than that of the ground.
- empirical formula,
- shield tunneling,
- settlement through,
- width factor,
- long-term settlement

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References

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