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Experimental Study on Pipe Strength and Field Performance of Pipe Jacking TBM in Deep-Buried Coal Mines
International Journal of Civil Engineering ( IF 1.8 ) Pub Date : 2021-05-10 , DOI: 10.1007/s40999-021-00632-w
Bin Tang , Zhenhua Wang , Hua Cheng , Mathias Yeboah , Yongzhi Tang , Zhishu Yao , Chuanbing Wang , Chuanxin Rong , Quansheng Liu

To study the strength of steel rebar-reinforced jacking pipes under the loading of deep-buried coal mine strata, this paper proposed a specially designed triaxial pipe loading system and a set of similitude model tests are conducted. The mechanical behaviors of pipes under triaxial loading conditions are analyzed and the configuration parameters of pipe prototypes are determined based on test results. The test results show that the loads are mainly undertaken by concrete rather than steel rebars and the strength of pipes can be increased more efficiently using higher grade concrete. Compared with increasing reinforcement ratio, using C60 concrete to fabricate pipes can increasing the ultimate bearing capacity to 2420 kN. The pipe jacking TBM penetrated 138 m in underground coal mine with a buried depth of 600 m and a maximum jacking force of 7042.58 kN. The construction methods and the performance of pipe jacking in deep-buried coal mine are illustrated. The monitoring data of jacking force and deviations are recorded and analyzed. The working experiences obtained from engineering practices are summarized. In addition, the suitability of pipe jacking in underground coal mines is examined.



中文翻译:

深埋煤矿顶管TBM管道强度和现场性能的试验研究。

为了研究深埋煤矿地层荷载作用下的钢筋混凝土顶管强度,提出了一种专门设计的三轴管道加载系统,并进行了一组模拟试验。分析了三轴载荷条件下管道的力学行为,并根据测试结果确定了管道原型的配置参数。测试结果表明,荷载主要由混凝土承担,而不是由钢筋承担,并且使用更高等级的混凝土可以更有效地提高管道强度。与提高配筋率相比,使用C60混凝土制造管道可以将极限承载力提高至2420 kN。顶管掘进机钻进地下煤矿138 m,埋深600 m,最大顶拔力7042。58千牛。阐述了深埋煤矿顶管的施工方法和性能。记录并分析起重力和偏差的监控数据。总结了从工程实践中获得的工作经验。此外,还检查了顶管在地下煤矿中的适用性。

更新日期:2021-05-10
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