Application of ANSYS 3D FEM in studies of surface deformation caused by pipe jacking

Fabin, Li; Kun, F. H.; Li, Hechao

doi:10.1007/s11859-006-0307-7

Cited by 16 publications

(5 citation statements)

References 2 publications

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“…The Exponential Smoothing Method is a time series analysis and forecasting method developed from the moving average method (Table 9). It involves analyzing the entire historical sequence data of the forecasting object, calculating exponential smoothing values, and using time series prediction models to forecast the development trends of a subject [21]. The selections of the smoothing coefficient and the numbers of smoothing operations are as follows:…”

Section: Exponential Smoothing Methodsmentioning

confidence: 99%

Advancements and Trends in Global Low-Carbon Aviation: A CiteSpace Knowledge Map Analysis

Shang,

Zhu,

Ren

et al. 2023

JGELCD

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The realm of low-carbon aviation, a critical sector in the construction of a low-carbon economy, has consistently garnered extensive attention. This study, utilizing bibliometric analysis and employing the visualization software CiteSpace, constructs knowledge maps based on data sourced from 358 core journal articles and (Chinese Social Sciences Citation Indexed) CSSCI articles in the China National Knowledge Infrastructure (CNKI) and 270 articles from the Web of Science (WOS) Core Collection. These maps elucidate the dynamics of research hotspots and evolutionary trends in the global low-carbon aviation industry by visualizing elements such as researchers, institutions, co-occurring keywords, surging keywords, and clustering time zones. The analysis reveals a dispersed pattern of domestic researchers with a need for enhanced collaboration, in contrast to more frequent collaborations among international researchers. Key issues such as fuel, carbon emissions, and environmental protection emerge as common focal points in both domestic and international contexts. Trends in aviation transportation and emission reduction are identified as converging research trajectories, with significant influence on the scholarly discourse and practical resolutions in the low-carbon aviation sector. The outcomes of this study hold substantial value for guiding academic research and addressing real-world challenges in the low-carbon aviation industry globally.

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Section: Exponential Smoothing Methodsmentioning

confidence: 99%

Advancements and Trends in Global Low-Carbon Aviation: A CiteSpace Knowledge Map Analysis

Shang,

Zhu,

Ren

et al. 2023

JGELCD

View full text Add to dashboard Cite

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“…e numerical simulation method is widely used to simulate the influence of pipe jacking construction on ground deformation [21]. Zhang et al [22] conducted a 3D numerical simulation to investigate the responses of pipe jacking construction on the roadway.…”

Section: Numerical Simulationmentioning

confidence: 99%

Measurement and Analysis of Settlement Induced by Rectangular Pipe Jacking in Silt Stratum

Tang

Sheng-cai

Zhu

2021

Advances in Materials Science and Engineering

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The large-scale rectangular pipe jacking technology has attracted more and more attention in the construction of urban underground pipe galleries, especially the problem of prediction and control of the surface settlement. Taking the pipe gallery project of Chengbei Road in Suzhou as an example, the settlement values of three groups of monitoring sections under the conditions of natural settlement and synchronous grouting are monitored, and the measured settlement values are compared with Peck formula and random medium theory. The results show that the Peck formula is more accurate in predicting the natural settlement within 1.5 times the pipe jacking width, while the stochastic medium theory is more accurate in predicting the settlement beyond the width. By comparing the field test and theory, the suggestions on the prediction of ground settlement of rectangular pipe jacking of large scale are put forward. The results of this study provide a basis for subsequent related research work and engineering applications.

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“…With the continuous development of the technology, the pipe jacking method has occupied a position in infrastructure construction [1,2]. In recent years, the research focus of pipe jacking has been the interaction between pipe string and surrounding complex soil environments [3][4][5], the indoor experiments [6][7][8][9][10], the numerical simulation [11][12][13], and the field investigation [14].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Complex Contact Frictional Property of an Ultralong Distance Large-Section Concrete Pipe Jacking and Prediction of Pipe String Stuck

Chen

2019

Advances in Materials Science and Engineering

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Line 2 of the Guanjingkou Pipe Jacking Project in Chongqing encountered a pipe sticking problem, whose occurrence was inevitably attributed to the higher total frictional resistance of pipe strings rather than the maximum jacking force. Line 1, which is about to start construction, has basically the same construction environment as Line 2 using the same microshield and pipe string sizes. To avoid repeating the pipe sticking problem of Line 2, the mutual friction characteristics between the surrounding rocks and jacked pipe strings are studied for Line 1 by adopting the same test method under seven complex contact conditions (the presence or various combinations of three substances, i.e., extrapipe string field debris, bentonite slurry, and sand-laden waste slurry, on the jacked pipe string-surrounding rock contact surface are mainly considered). The results show that sufficient bentonite slurry can effectively reduce the frictional resistance, and when the amount of bentonite is insufficient, the average friction coefficient (AFC) of the later contact surface increases by 50%∼70%. The comparison of the monitored versus predicted jacking forces indicates that the value predicted by the test is slightly higher than the monitored force and the variation trends of the two match well, thus proving the correctness of the test results. It is possible to continue predicting the variation trends of the jacking force and frictional resistance based on the contact situation outside the pipe string wall, which greatly lowers the probability of re-encountering pipe sticking. The test results not only explain the important role of bentonite slurry in reducing the pipe string wall frictional resistance but also suggest that an increase in the pipe string wall frictional resistance resulting from the complex contact inflow into the overexcavation gap is the root cause of pipe sticking; moreover, the number of jacked pipe strings matching a single IJS is the second cause of pipe string sticking. The methodology of this study can provide a reference for other studies concerning the jacking force of long-distance rock microshield tunnelling.

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Application of ANSYS 3D FEM in studies of surface deformation caused by pipe jacking

Cited by 16 publications

References 2 publications

Advancements and Trends in Global Low-Carbon Aviation: A CiteSpace Knowledge Map Analysis

Advancements and Trends in Global Low-Carbon Aviation: A CiteSpace Knowledge Map Analysis

Measurement and Analysis of Settlement Induced by Rectangular Pipe Jacking in Silt Stratum

Experimental Study on the Complex Contact Frictional Property of an Ultralong Distance Large-Section Concrete Pipe Jacking and Prediction of Pipe String Stuck

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