Results 11 to 20 of about 128 (100)

Calculation Model of Safety Distance between Shield Tunnels and Underground Cavities in Water-Rich Sandy Cobble Stratum

Chengshi guidao jiaotong yanjiu
［Objective］In order to ensure the shield tunnel construction safety in water-rich sandy cobble stratum when passing through underground cavities, it is necessary to study the safe distance between the shield tunnels and the underground cavities.
XIE Lihui
doaj   +2 more sources

Application of Grouting Method for Underground Excavation Construction of Urban Rail Transit Connecting Passage in Water-rich Sandy Cobble Stratum

Chengshi guidao jiaotong yanjiu
Objective Connecting Passage 1 in the interval of Jiujiang North Station and Longqiao Road Station of Chengdu Metro Line 19 Phase II is located in water-rich sandy cobble stratum.
LI Qiaobin, ZHANG Zhening, ZHONG Jiuan, ZANG Peng, CHEN Xiaodong   +4 more
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Study on the correlation of macro-fine parameters of surrounding rock in sand and cobble tunnel based on discrete element

Materials Research Express, 2022
As a mixture of soil and rock, the deformation of surrounding rock caused by tunnel excavation in the sandy cobble stratum is affected by the meso-structure of the stratum.
Peng Zhao, Weibin Ma
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Settlement and Stress Characteristics of the Ground in the Project of a Double-Line Tunnel Undercrossing an Airport Runway in a Sandy Cobble Region

Applied Sciences, 2022
The engineering technology of undercrossing an airport flight area is relatively mature; however, the use of shield tunnels crossing the operating airport flight area in high liquidity sandy cobble stratum has rarely been reported.
Xuwei Zhao, Jia Li, Wei Liu, Wenge Qiu
doaj   +1 more source

Performance of Slurry Shield Tunnelling in Mixed Strata Based on Field Measurement and Numerical Simulation

Advances in Materials Science and Engineering, 2020
There are severe challenges for slurry pressure balance tunnel boring machine (TBM) tunnelling in sandy cobble soil of Beijing, Chengdu, and Lanzhou in China. And the problems caused by tunnelling from silty clay to sandy cobble stratum are more serious.
Jian Cui, Wang-Hao Xu, Yong Fang, Li-Ming Tao, Chuan He   +4 more
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Influence of stone content on face stability for tunnels in sandy cobble strata

Frontiers in Earth Science, 2023
As a result of the complex geological conditions of sand-cobble stratum, various types of problems may arise during construction of tunnels crossing sand-cobble stratum, the most prominent of which is the stability problem of the face.
Haifang Xue, Haifang Xue, Haoteng Wang, Lingyun Li, Lingyun Li, Xiaoqin Gong, Xiaoqin Gong, Ying Zhao, Jianbin Zhao, Yonghao Zhang   +9 more
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Prediction method of shield tunneling parameters in pebble stratum formed by weathered granite and quartzite

Frontiers in Earth Science, 2023
The pebble formation formed by weathered quartzite and granite is usually of high strength, strong permeability and poor self stability, which brings great difficulties to shield tunneling.
Meiyan Wang, Meiyan Wang, Dajun Zhao, Yan Lv, Wei Wang, Xing Wang   +5 more
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Model tests on face stability of shallow shield tunnels in sandy cobble strata

Yantu gongcheng xuebao, 2018
In order to study the response of shallow sandy cobble strata to shield excavation and face stability, an earth pressure balance shield model is designed to conduct the indoor model tests.
LI Wei-ping 1, LI Xing 2,3, XUE Ya-dong 2,3, ZHANG Sen 2,3, GE Jia-cheng 2,3
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Adaptability of the Cutter-Head of the Earth Pressure Balance (EPB) Shield Machine in Water-Rich Sandy and Cobble Strata: A Case Study

Advances in Civil Engineering, 2020
Earth Pressure Balance (EPB) shield machines are considered to be the most efficient tunneling method for Metro tunnels due to their adaptability to a great variety of ground conditions, higher construction efficiency, and providing a safer working ...
Chaodong Wan, Zhiyi Jin
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Experimental Study of the Influence of Excavation Surface Stability and Sand Flowability Caused by Dense Slurry–Earth Pressure Balance Shield Tunneling in Silty Sand Stratum

Advances in Civil Engineering, 2020
Silty sand is highly permeable and has a large internal friction angle. To ensure the stable and efficient construction of the Earth pressure balance (EPB) shield in silt stratum, it is necessary to reduce the disturbance to the stratum during tunneling ...
Yongjin Qian, Fanlu Min, Zhenze Mo, Xihui Fan   +3 more
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