Zhu Zihao, Ma Baosong, Zeng Zheng, Gong Chenkun, Mei Zhe, Hu Jinqiu, Zhang Peng
Faculty of Engineering, China University of Geoscience-Wuhan, Wuhan 430074, China.
School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China.
Materials (Basel). 2022 Jul 11;15(14):4830. doi: 10.3390/ma15144830.
For buried municipal tunnels-such as cable tunnels and utility tunnels with structural defects-due to the sheltering of the internal pipelines, shelves, and other auxiliary facilities, traditional trenchless rehabilitating methods are not applicable since an intact ring is needed for spraying and lining. In these tunnels, only the exposed area at the crown of the ring can be partly rehabilitated. In this paper, three-edge bearing tests (TEBTs) for partially rehabilitated reinforced concrete (RC) pipe sections are carried out to simulate the case of a municipal tunnel and the effects of different repair materials (cement mortar and epoxy resin) and different dimensional parameters of the liner (lining thickness, lining range) on the partial rehabilitation effect of defective RC pipes are studied. The deforming compatibility of the liner-pipe interface is discussed, and the flexural rigidity of the partially rehabilitated section is calculated. The results show that the load-carrying capacities of partial rehabilitated RC pipes are effectively improved.
对于埋地市政隧道，如存在结构缺陷的电缆隧道和综合管廊，由于内部管道、支架及其他辅助设施的遮挡，传统的非开挖修复方法并不适用，因为喷涂和衬砌需要完整的环形。在这些隧道中，只能对环形顶部的暴露区域进行部分修复。本文开展了部分修复的钢筋混凝土（RC）管段的三边承载试验（TEBT），以模拟市政隧道的情况，并研究了不同修复材料（水泥砂浆和环氧树脂）以及衬砌不同尺寸参数（衬砌厚度、衬砌范围）对缺陷RC管部分修复效果的影响。讨论了衬砌与管道界面的变形协调性，并计算了部分修复截面的抗弯刚度。结果表明，部分修复的RC管的承载能力得到了有效提高。
