Experimental Study on Pipe Strength and Field Performance of Pipe Jacking TBM in Deep-Buried Coal Mines

Tang, Bin; Wang, Zhenhua; Cheng, Hua; Yeboah, Mathias; Tang, Yongzhi; Yao, Zhishu; Wang, Chuanbing; Rong, Chuanxin; Liu, Quansheng

doi:10.1007/s40999-021-00632-w

Cited by 4 publications

(6 citation statements)

References 25 publications

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“…Using the theory of slip line field, the slip line field of shear-slip failure of homogeneous elastic-plastic surrounding rock and the calculation formula of ultimate load including failure characteristic parameters are obtained [24]. It is confirmed that the lithology of the surrounding rock and the size of the roadway section are important factors affecting the fracture range of the surrounding rock [25]. The mechanism and influencing factors of four types of kick drums, including squeeze-fluid kick drum, flexurally folded kick drum, shear dislocation kick drum and water-expandable kick drum, were analyzed [26].…”

Section: Introductionmentioning

confidence: 81%

Asymmetrical Deformation Mechanisms in Layered Inclined Surrounding Rock of Roadways

Tan,

Zhan,

Zhen

et al. 2023

GSI

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In the context of layered inclined surrounding rock in roadways, this study presents a comprehensive analysis focusing on the asymmetrical deformation characteristics inherent to such geological structures. The intersection of layered surrounding rock with roadways forms the basis for constructing a deformation partition model, encompassing distinct sub-regions around the roadway. This model facilitates a detailed mechanical analysis, wherein the stress exerted on rock formations within each sub-region is meticulously examined. Consequently, specific mechanical formulas correlating to the stress in different sub-regions are established. This approach yields insights into the failure modes of the layered surrounding rock across various sub-regions. Notably, the roadway's high side predominantly exhibits tensile failure, whereas the low side is characterized by shear failure. The application of the Goodman model enables a simulation of interlayer slip occurring between the surrounding rock of the roadway, distributed across different partitions. This study delineates the deformation of the layered inclined surrounding rock road-way as a process with pronounced temporal characteristics. The progression of deformation and failure in the surrounding rock typically initiates at the tangent point between the roadway roof and the rock layer, extending to the roadway floor, the high-top bottom angle, and subsequently the low-top bottom angle. This sequence culminates in the development toward the high-top shoulder angle. The research further establishes a direct correlation between the onset of asymmetrical deformation and the angle of shear stress on the roadway surface relative to the inclination of the rock formation; a smaller angle precipitates an earlier onset of this deformation.

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Section: Introductionmentioning

confidence: 81%

Asymmetrical Deformation Mechanisms in Layered Inclined Surrounding Rock of Roadways

Tan,

Zhan,

Zhen

et al. 2023

GSI

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“…It can synchronously complete the trenchless laying of pipe sections one by one immediately following the back of the pipe jacking machine. The whole trenchless pipe jacking construction process of underground structures does not require extensive excavation of the surface [1][2][3][4][5][6][7]. Currently, the cross-section shape of pipe section used for trenchless pipe jacking is mainly circular and rectangular.…”

Section: Technical Principle Of Trenchless Pipe Jackingmentioning

confidence: 99%

“…Compared with the traditional mining methods such as manual excavation and drilling-blasting method, pipe jacking has many significant advantages, including fast construction speed, strong formation adaptability, tunneling and supporting are carried out simultaneously, cut down material, safe working environment, etc. [1][2][3][4][5][6][7][8][9]. In particular, pipe jacking can make holes quickly and efficiently construct large-section underground rescue channels after accidents or disasters such as the collapse of coal mine roadway.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, pipe jacking can make holes quickly and efficiently construct large-section underground rescue channels after accidents or disasters such as the collapse of coal mine roadway. It can play a very positive and vital role in avoiding or reducing the occurrence of serious underground accidents and disasters, as well as reducing casualties and property losses [3][4][5][6][7]. Moreover, it is different from the way that the power of the shield machine when it drives and moves forward in the formation comes from several hydraulic jacks arranged in the ring direction at the tail of the shield, in the practice of pipe jacking engineering, the main driving force for the complete set of pipe jacking machine and pipe sections to excavate and move forward in the formation comes from the jacking equipment set in the launching shaft at the end of the pipe sections.…”

Section: Introductionmentioning

confidence: 99%

“…Many pipe jacking engineering practices show that if the pipe-soil frictional resistance is too large, it may cause the engineering accidents such as jacking difficulty, pipe section cracking, the back support wall of launching shaft damage, etc. [1][2][3][4][5][6][7][8][9][10][11][12][13]21] Thus, there are two key aspects to ensure the smooth implementation of trenchless pipe jacking operation as follow: (1) How to accurately estimate the jacking force for the construction design of pipe jacking operation? Currently, the main estimation methods of jacking force include theoretical analysis, experimental test, theoretical calculation equations, empirical estimation equations, and field monitoring, etc.…”

Section: Introductionmentioning

confidence: 99%

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Comparative research on the pipe-soil frictional resistances of circular and rectangular pipe sections during trenchless pipe jacking

Wen,

Zhang,

Xiang

2024

PLoS ONE

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Pipe jacking is a trenchless construction method to achieve forward tunneling and efficient construction of underground structure simultaneously without extensive surface excavation. In the process of pipe jacking construction, the jacking force provided by the hydraulic jacking equipment must overcome the frontal resistance of the cutter head and the frictional resistance between the pipe sections and formation at the same time. In particular, the pipe-soil frictional resistance increases with the increases of jacking distance, buried depth, pipe diameter and the complexity of jacking trajectory. Therefore, it is very important to correctly estimate jacking force in trenchless jacking engineering practice for the smooth implementation of pipe jacking, operation risk and comprehensive cost control. Firstly, the stress states of jacking circular and rectangular pipe sections in the soil are analyzed, and the key influencing factors of their pipe-soil frictional resistance are obtained respectively. Then, the pipe-soil frictional resistance of jacking the circular and rectangular pipe sections with the same external surface area in the dry sandy soil and coal granular layer are tested separately by using the self-developed multifunctional experimental apparatus during trenchless pipe jacking. The results show that the pipe-soil frictional resistances of jacking circular and rectangular pipe sections in the coal granular layer are always smaller than that in the sandy soil under the same experimental conditions, and the corresponding fitting calculation equation of pipe-soil frictional resistances are obtained respectively. Meanwhile, the modified calculation methods of the above pipe-soil frictional resistances are proposed respectively based on the relationship between the lateral pressure coefficient K and the buried depth of pipe section H. Moreover, the disturbed area of soil in the upper part of jacking circular pipe section presents an arc distribution, while the disturbed area of soil in the upper part of jacking rectangular pipe section presents a slightly concave distribution. Due to the different disturbance conditions of soil around the pipe section, the lateral pressure coefficient K should be corrected in the calculation equations of pipe-soil frictional resistance of jacking circular and rectangular pipe sections based on the discrete element numerical simulation analysis by EDEM software. Finally, the pipe-soil frictional resistances obtained by different methods in the sandy soil are compared and analyzed. The calculated values of the modified theoretical calculation method are very close to the experimental test values, while the other methods are smaller than the experimental test values, which makes the rationality of the modified theoretical calculation method of pipe-soil frictional resistance is verified, and some suggestions are also put forward for the value of some coefficients in the relevant empirical estimation equations. The above research achievements systematically compared the states of pipe-soil frictional resistances of jacking circular and rectangular pipe sections based on different research methods, especially for the correct evaluation of jacking force during trenchless pipe jacking, they could provide some valuable references and effective guidance for the subsequent research, engineering practice and further development of trenchless pipe jacking technology.

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Performance analysis of utility tunneling data: A case study of pipe jacking in hard rock in Brittany, France

Lehmann

Käsling

Cambier³

et al. 2022

Tunnelling and Underground Space Technology

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Experimental Study on Pipe Strength and Field Performance of Pipe Jacking TBM in Deep-Buried Coal Mines

Cited by 4 publications

References 25 publications

Asymmetrical Deformation Mechanisms in Layered Inclined Surrounding Rock of Roadways

Asymmetrical Deformation Mechanisms in Layered Inclined Surrounding Rock of Roadways

Comparative research on the pipe-soil frictional resistances of circular and rectangular pipe sections during trenchless pipe jacking

Performance analysis of utility tunneling data: A case study of pipe jacking in hard rock in Brittany, France

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