混凝土与膨胀垫块对防止埋管破坏的地面加固效果试验研究

IF 0.4 Q4 ENGINEERING, GEOLOGICAL Journal of the Korean Geosynthetic Society Pub Date : 2019-01-01 DOI:10.12814/JKGSS.2019.18.1.091
Jeongjun Park, H. Shin, J. Yuu, G. Hong
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摘要

最近,为了提高生活便利性,在市区进行了地面空腔修复、地埋管更换等小规模开挖工程。本文介绍了在地埋管下方因地基压实不良而产生差异沉降时,采用降低地埋管损伤的地面加固方法的试验结果。通过板载试验,评价了埋管下方地面采用混凝土垫层和膨胀垫层对地面的加固效果。结果表明,混凝土垫层和膨胀垫层根据附加荷载的应力消减率分别为46% ~ 48%和39% ~ 42%。因此,混凝土垫层和膨胀垫层的加固作用减小了埋地管的差异沉降和埋地管下方的地面变形。这意味着,如果在埋地管下方或埋地管之间的地面上加固混凝土垫层和膨胀垫层,就有可能防止埋地管因地下空腔和地面沉降而损坏。
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An Experimental Study on Ground Reinforcement Effect of Concrete and Expansion Mat for Prevention of Buried Pipe Damage
Recently, small-scale excavation like ground cavity restoration and buried pipe replacement works are being carried out in urban area, in order to improve living convenience. This paper describes experiment results on the ground reinforcement method that can reduce the buried pipe damage, when the differential settlement occurred due to poor compaction of ground below the buried pipe. Plate load tests were conducted to evaluate a reinforcement effect of ground using concrete mat and expansion mat in the ground below the buried pipe. The results showed that the stress reduction ratio by concrete mat and expansion mat according to the surcharge load was about 46%∼48% and 39%∼42%, respectively. Therefore, the differential settlement of the buried pipe and the ground deformation below the buried pipes were reduced by the reinforcement effect of the concrete mat and expansion mat. This means that it is possible to prevent a buried pipe damage due to underground cavity and ground subsidence, if concrete mat and expansion mat are reinforced in the ground below the buried pipe or on the ground between the buried pipes.
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