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Analysis of the influence of geometrical parameters of circular steel pipe with flange plate on the jacking force

Underground Space 2022年第3期7卷 324-336页

作者： Zhiguo Wang Wen Zhao He Wang Yang Chen Qian Bai Shengang Li College of Resources and Civil Engineering Northeastern UniversityShenyangChina Dalian University of Technology DalianChina School of Civil Engineering and Architecture Xi’an University of TechnologyXi’anChina

jacking force is one of the important safety indicators during pipe jacking *** models for calculating jacking force are widely used in the calculation of jacking force for pipe with regular *** this paper,considering pipe-soil interaction,the cross-sectional characteristics and the distribution characteristics between pipe and soil,the calculation equations for the jacking force of circular steel pipe with flange plate were proposed based on the pressure arch *** proposed equations were applied to calculate the jacking force for the Olympic Sports Center Subway Station of Line 9 in Shenyang,China,and the results were compared with the field monitoring data to predict the accurate jacking *** on the proposed equations,the influences of the flange plate position and steel pipe diameter on earth pressure around the pipe were *** functional relationship between the earth pressure and the position of flange plate or the pipe diameter was obtained,which provides design basis and theoretical guidance for engineering practice.

关键词： Pipe jacking Flange plate jacking force Pressure arch theory Earth pressure STS pipe roofing method

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A study of jacking force for a curved pipejacking

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Journal of Rock Mechanics and Geotechnical Engineering 2010年第4期2卷 298-304页

作者： K.J.Shou J.M.Jiang Department of Civil Engineering National Chung Hsing University Taichung China

For a pipejacking, the jacking force is critical to balance the resistance force and to move the pipe string forwards. The driving mechanism of a curved pipejacking is more complicated than a straight-line pipejacking, and its jacking force is also more difficult to be determined. The paper theoretically studies the jacking force of a curved pipejacking by considering the static equilibrium of earth pressure, resistance at cutting face, friction at pipe surface, and the driving force behind the pipe string. The derived theoretical formula can be used to estimate the driving forces of a straight-line or a curved pipejacking. Case study was performed by applying the theoretical and empirical formulae. After calibration, the corrected formula is more accurate and more applicable.

关键词： pipejacking curved pipejacking jacking force statics analysis

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Analysis of jacking forces during pipe jacking in granular materials using particle methods

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Underground Space 2019年第4期4卷 277-288页

作者： Xinbo Ji Pengpeng Ni Marco Barla School of Civil Engineering Sun Yat-sen UniversityZhuhai 519082China School of Civil and Environmental Engineering Nanyang Technological UniversitySingapore 639798Singapore The Fifth Engineering Co. Ltd.of ChinaTiesiju Civil Engineering GroupJiujiang 332000China Department of Structural Geotechnical and Building EngineeringPolitecnico di TorinoTurinItaly

Trenchless technology is often used in congested urban areas or river crossings to install underground pipelines to minimize disturbance to surface traffic or other *** jacking is a typical technique applied to jack pipe segments between two working ***,the design of the jacking force is usually implemented using empirical *** should be emphasized that the jacking force will change for each site,depending on the magnitude of overcut,lubricants,work stoppages,geology and misalignment.A particle method is proposed to estimate the jacking force along the *** microparameters are calibrated for sandy soils in Shenyang,so that the macroscale material behavior can be reproduced using the particle ***,the normal force around the pipe circumference can be derived in the particle model,after which the interface friction coefficient is applied to evaluate the friction resistance mobilized at the soil-pipe interface.A modified Protodyakonov’s arch model can be used to assess the magnitude of earth pressure acting on the shield *** the end,the combination of friction resistance and face pressure provides the jacking *** efficacy of the proposed particle method is demonstrated by comparing calculated jacking forces with those measured in the field for three types of jacking machines in sandy soils under the Hun River,Shenyang.

关键词： Pipe jacking jacking force Particle methods Distinct element

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Finite Element Analysis Study of Box Culvert jacking-Out Construction under Existing Railway Line

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Engineering（科研） 2023年第3期15卷 196-206页

作者： Senqiang Lu Yating Sun Qiaowen Hu Road and Bridge Department Zhejiang Institute of Communications Hangzhou China

To shorten the existing box culvert demolition construction period and ensure the normal operation of the railway, the jacking-out construction method was adopted. The ABAQUS finite element software was used to establish a three-dimensional model of the box culvert and soil body of the relying project, and three excavation thickness (0m, 1 m, 2 m) were used as the main variation parameters for numerical analysis and research, and the change law of the box culvert itself and soil body stress during the culvert jacking out process was obtained. The results show that the jacking force-displacement curves of the three working conditions can be divided into two stages, and the jacking force reaches the maximum value at the moment when the static friction turns into sliding friction at the end of the first stage. The stress distribution at the bottom slab of the box culvert in the jacking process is approximately normal, and the stress decreases with the increase of the roadbed excavation thickness. The increase of the roadbed excavation thickness can reduce the soil pressure on the side of the box culvert and effectively reduce the deformation of the roadbed in the jacking-out process. The deformation of the roadbed during the jacking process can be reduced by increasing the thickness of the roadbed excavation.

关键词： Existing Box Culvert jacking-Out Construction Excavation Thickness jacking force

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