摘要
基于福州盖山电缆线路隧道工程背景,采用地质雷达探测装备,分析盾构隧道土层密实状态地质雷达探测的特征参数,研究盾构隧道线路与地下构筑物周围的土体密实状态,揭示盾构隧道土层密实状态的地质雷达响应规律。研究结果表明:①地质雷达探测的纵向探测和横向探测,均表现出近地表2m以浅范围反射波纹整体均匀、连续,整体地层分布均匀,且密实状态较好,但局部仍存在土层疏松现象;②沿盾构隧道探测,雷达探测波整体分布均匀、连续,地层密实状态较好,但局部存在疏松孔洞,分布区域主要为1~4.5m;③地铁站附近采用地层预注浆处理,雷达探测波整体分布均匀、连续,因此探测范围内的地层密实度较好,完整性较好,未探测到任何地质异常区。
Based on the background of Fuzhou Gaishan Cable Line Tunnel Project,the characteristic parameters of soil compaction state of shield tunnel are analyzed by using GPR.The compactness of soil around shield tunneling lines and underground structures is studied to reveal the GPR response law of soil layer compactness of shield tunnels.The research results show that:(1)Longitudinal and transverse detection by GPR show that the reflection ripple in shallow range near the surface is uniform and continuous as a whole,the whole stratum is uniformly distributed,and the compactness is good,but there is still looseness of soil layer locally;(2)In shield tunnel detection,the radar detection waves are uniformly and continuously distributed as a whole,and the stratum is in a good compact state,but there are some loose holes locally,the distribution area is mainly 1-4.5m;(3)The formation pre-grouting treatment is used near the subway station.The radar detection waves are uniformly distributed and continuous on the whole.Therefore,the formation within the detection area has a good compactness and integrity,and no geological abnormal areas have been detected.
作者
苑健
林君君
YUAN Jian;LIN Jun-jun(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China;POWERCHINA ROADBRIDGE GROUP CO.,LTD.,Beijing 100160,China)
出处
《云南水力发电》
2021年第12期9-13,共5页
Yunnan Water Power
关键词
地质雷达探测
盾构隧道
特征参数
地层密实状态
GPR Detection
shield tunnel
characteristic parameter
formation compactness
