Effect of ground surface surcharge on deformational performance of tunnel in spatially variable soil

Zhang, Jinzhang; Huang, Hongwei; Zhang, Dongming; Zhou, Mingliang; Tang, Chong; Liu, Dejun

doi:10.1016/j.compgeo.2021.104229

Cited by 90 publications

(20 citation statements)

References 66 publications

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“…During jacking under water, there are possible combustible biological gases embedded into the rotten materials in the underwater shallow ground (20). The shallow biogas may penetrate the pipeline from the joints of the segmental lining, the head and the shield tail of the jacking machine, which could result in casualties and property loss (21)(22)(23)(24). Therefore, a system for monitoring harmful gas is required during the pipe-jacking construction.…”

Section: Ventilation and Gas Monitoringmentioning

confidence: 99%

Case Study of the Largest Concrete Earth Pressure Balance Pipe-Jacking Project in the World

Jiang

Zhang

Wang

et al. 2022

Transportation Research Record: Journal of the Transportation R

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Pipe jacking has been the dominant trenchless technology for constructing small (<2 m) to medium-diameter (<4 m) tunnels. Uncertainties and construction difficulties increase significantly when the diameter of the tunnel exceeds 4 m. This paper presents a case study of the largest concrete pipe-jacking tunnel project in the world, the sewerage tunnel along Jinshan Lake, Zhenjiang, China. In this project, an underwater tunnel with a diameter of 4.67 m was constructed by the earth pressure balance (EPB) pipe-jacking method. The case study reports project background, and geological and hydrogeology conditions. The key techniques such as the selection of pipe-jacking machine, jacking force estimation and control, design of intermediate jacking station, grouting process control, launching, and reception of the tunnel boring machine, trajectory control of pipe jacking, and ventilation and gas monitoring during the construction period were investigated and discussed. Furthermore, to overcome the technical difficulties associated with the oversized jacked tunnel, the corresponding countermeasures were adopted point by point, so that the safety of the whole project could be guaranteed. This study filled the knowledge gap of technical know-how for large-diameter (over 4.5 m) pipe-jacking tunnel and is expected to provide practical guide for future large-diameter pipe-jacking tunnels.

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Section: Ventilation and Gas Monitoringmentioning

confidence: 99%

Case Study of the Largest Concrete Earth Pressure Balance Pipe-Jacking Project in the World

Jiang

Zhang

Wang

et al. 2022

Transportation Research Record: Journal of the Transportation R

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“…This is because in the close‐distance coal seams mining, the downward mining method is commonly used, and the floor damage caused by upper coal seam mining endangers the mining of lower coal seam. Therefore, it is very important to study the stability of rock and soil mass 6,7 …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is very important to study the stability of rock and soil mass. 6,7 The stability of the floor surrounding rock during the mining of closely coal seams is affected by its mechanical properties and the distribution of the original rock stress field. 8 Besides, it is also affected by the mining sequence of the mining area, the relative position of the surrounding rock, and the mining area.…”

mentioning

confidence: 99%

Study on distortion energy and stability of gob floor based on stress deviator field

Shan

Wang

et al. 2022

Energy Science & Engineering

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To analyze the plastic failure process and mechanism of gob floor in the process of close-distance coal seams mining, a simplified mechanical model of the lateral abutment pressure of the gob was proposed to derive the stress of surrounding rock. The distribution characteristics of gob floor stress deviator were obtained, and the effect of geological parameters (coal depth H and horizontal lateral pressure coefficient λ) were studied. By combining Mohr-Coulomb theory, the influence of surrounding rock cohesion c, internal friction angle φ, different coal seam depths H and different horizontal lateral pressure coefficients λ on the distribution of plastic zone of gob floor was obtained. The results showed that the distribution of the plastic zone under different geological factors is roughly the same as that of the stress deviator. This also proves that the excavation of the rock layer causes the redistribution of stress, which leads to the plastic failure of the surrounding rock. To verify the rationality of the proposed model, industrial experiments and simulation experiments were carried out. The results of on-site investigation showed that the stability and integrity of surrounding rock in the concentration area of stress deviator is far less than that in the low concentration area. In addition, the acoustic wave test and the displacement field monitoring result of surrounding rock in the simulation experiments of a similar model are basically consistent with the distribution of the stress deviator field. These results agree well with the distribution of stress deviator obtained by theoretical calculation.

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“…Ma et al [10] carried out precracking blast vibration damping tests to investigate the vibration damping effect of the precrack formed; Zhou et al [11,12] explored the future trends of seismic resistance, isolation, passive, and active control technologies; Zhu et al [13] illustrated the scope, advantages, and disadvantages of the use of different seismic isolation bearings and dampers in building structures, as well as the practicality and economy of further improving seismic isolation bearings and damping devices; Zhou [14] illustrated the effectiveness of the laminated seismic-isolated system in controlling seismic response; Yuan et al [15,16] analysed the dynamic response of several seismic isolation structures and traditional masonry structures and concluded that the seismic isolation structure can effectively absorb seismic energy, among which the composite isolation system has the best seismic isolation effect; Wang et al [12,[17][18][19][20] studied the variation of stresses and strains with time in structures subjected to strong dynamic loads such as explosions and impacts. Li et al [21,22] studied the stress-strain relationship of soil under repeated loads to provide data support for practical engineering. Natale et al [23,24] studied a PBEE-based method to quantify the payback time (PBT) of seismic retrofit solutions for existing RC buildings, based on the fact that the high installation costs of foundation isolation limit its widespread use in common designs; Li [25] applied different dampers to an engineering example for performance analysis; Wang [26] used three different support systems for a dynamic time analysis of the Songhua Bridge and concluded that the system equipped with dampers was more favourable for seismic resistance; Li and Zhou et al [27,28] introduced the composition and performance of friction pendulum and how to mitigate the seismic effect of building structures in engineering practice; Nakamura and Okada et al [29] verified the effectiveness of seismic isolation and reaction control methods by shaking table tests and seismic response analysis for three types of rubber bearings and three types of damping devices; Natale et al and Di Sarno et al [23,30] studied how highly damped rubber bearings mitigate the seismic effects of steel buildings in actual earthquakes; Shahbazi and Moaddab [...…”

Section: Introductionmentioning

confidence: 99%

Seismic Response and Economic Study of New Light Steel-Wood-Plastic Structure in Rural Yunnan, China

et al. 2022

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A new type of light steel-wood-plastic residential structure in rural has popular in recent years in rural Yunnan, China. The application of light steel, wood, and new plastic materials in practical engineering is gradually increasing due to its advantages of green ecology and waste utilization, and its response characteristics under earthquakes have attracted great attention. In this paper, seismic-resistant models, seismic-isolated models, and seismic-damped models for multistorey light steel-wood-plastic structures were established using the SAP2000 finite element software based on different seismic response methods. The seismic-isolated model is divided into five schemes, namely, LRB400, LRB500, LRB600, high damped, and friction pendulum-isolated bearings, and the seismic-damped model is divided into three schemes, namely, ordinary bracing, soft-steel bracing, and BRB bracing at the same locations around the 2nd floor of the building. Nonlinear time analysis was carried out for the nine schemes, comparing the period, structural interstorey displacement, base shear, top displacement, top acceleration, and economy of the structure under the action of an 8-degree earthquake. Results show that the period of the seismic-isolated system increased by approximately 130% compared to the seismic-resistant system, and the period of the damped system decreased slightly compared to the seismic system, the interstorey displacement, base shear, and top acceleration of both the seismic-isolated system and the damped system were smaller than those of the seismic-resistant system, and the seismic-isolated system decreased by approximately 40% compared to the damped system, and the seismic-isolated system was more effective than the damped system. From the comparison of postearthquake damage cost and full-cycle cost, the economic performance of the seismic-isolated structure is better than that of the damped and seismic-resistant structures. The conclusions of this paper can provide a scientific reference for promoting the use of new light steel-wood-plastic residential buildings.

show abstract

Effect of ground surface surcharge on deformational performance of tunnel in spatially variable soil

Cited by 90 publications

References 66 publications

Case Study of the Largest Concrete Earth Pressure Balance Pipe-Jacking Project in the World

Case Study of the Largest Concrete Earth Pressure Balance Pipe-Jacking Project in the World

Study on distortion energy and stability of gob floor based on stress deviator field

Seismic Response and Economic Study of New Light Steel-Wood-Plastic Structure in Rural Yunnan, China

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