Study on Thrust of Earth-Pressure-Balanced Shield Tunneling in Gravel

Fang, Yong; He, Chu; Xu, Guowen; Jiang, Yingchao; Wang, Yan

doi:10.1061/41202(423)204

Cited by 2 publications

(2 citation statements)

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“…In order to study the degree of influence of construction of electric shield tunneling under the Ba River on geological and ground deformation, and to analyze the sensitivity of various construction parameter factors to the geological environment, three influencing factors were selected: soil chamber pressure, grouting pressure, and grouting layer thickness [7,8] , with four different levels for each factor. According to the actual engineering situation, the L16 (43) orthogonal test table was selected to simulate 16 working conditions [9] .…”

Section: Design and Results Analysis Of Orthogonal Experimental Numer...mentioning

confidence: 99%

Research on Deformation Control of Power Shield Tunnels Undercrossing Rivers Based on Orthogonal Experimental Method

Fu,

Zheng,

2024

Atlantis Highlights in Engineering

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When the shield tunnel is constructed under the river, the shield machine is excavated in the water-rich sand layer with rich water content and strong permeability, and it is difficult to control the stratum disturbance deformation during construction. In this paper, based on the project of Xi 'an 330kV power shield tunnel underpassing Bahe River, a three-dimensional fluid-solid coupling model of power shield tunnel underpassing Bahe River is established by using orthogonal test and numerical simulation. The sensitivity of soil pressure, grouting pressure and grouting layer thickness to stratum deformation is studied. The results show that the grouting pressure is the main influencing factor when the maximum ground settlement, the maximum vertical displacement and the maximum horizontal displacement of the stratum are taken as the evaluation indexes, while the sensitivity of grouting layer thickness and soil chamber pressure is small. Therefore, in the construction of river-crossing shield, the change of synchronous grouting pressure and grouting volume should be preferentially controlled according to the monitoring data and parameter feedback, and the parameters should be optimized and adjusted in time to control the deformation of the stratum.

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Section: Design and Results Analysis Of Orthogonal Experimental Numer...mentioning

confidence: 99%

Research on Deformation Control of Power Shield Tunnels Undercrossing Rivers Based on Orthogonal Experimental Method

Fu,

Zheng,

2024

Atlantis Highlights in Engineering

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“…Construction cycle: The simulation of gravity stress field → soil excavation, releasing part of the hole circumferential stress→ segment on the excavated section at the same time release the rest hole circumferential stress→ next soil excavation, releasing part of the hole circumferential stress→ segment on the excavated section at the same time release the rest hole circumferential stress. The rest of the excavations are of the same steps[2][3]. Formation parameters refer to engineering geology exploration report of the preliminary design stage as shown in Table1.…”

mentioning

confidence: 99%

Three Dimensional Finite Element Analysis of Subway Shield Tunnel under Exsisting Bridge

Zhang

et al. 2013

AMM

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One city subway shield tunnel under-passing an existing bridge is analyzed, using the method of the three dimensional finite element analysis to simulate the process of excavating the left and right tunnel to get the data of the subsidence, lateral, stress of the bridge, besides the reaction of the upper structure of the bridge when the shield machine thrusting ahead. The results of the study show that the overall settlement value of the pier is not big, but around piers on both sides, the maximum lateral come to 2.6 mm, and the maximum tension, compression stress of the bridge foundation increased by 1.07MPa and 0.4MPa, and arch structure in construction process stress adverse, it is suggested that we should reinforce the soil around the tunnel treatment to control the bridge foundation of uneven settlement, and at the same time, the process of closely monitor the situation of arch bridge.

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Study on Thrust of Earth-Pressure-Balanced Shield Tunneling in Gravel

Cited by 2 publications

References 0 publications

Research on Deformation Control of Power Shield Tunnels Undercrossing Rivers Based on Orthogonal Experimental Method

Research on Deformation Control of Power Shield Tunnels Undercrossing Rivers Based on Orthogonal Experimental Method

Three Dimensional Finite Element Analysis of Subway Shield Tunnel under Exsisting Bridge

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