地震CT法在花岗岩球形风化残留体勘探中的试验研究

发布时间：2018-04-13 08:34

本文选题：盾构隧道 + 花岗岩风化残留体　；参考：《隧道建设》2016年01期

【摘要】：在城市盾构隧道建设过程中,盾构掘进若遇到花岗岩风化残留体(俗称孤石),掘进施工将非常困难,盾构姿态难以控制,刀具磨损严重,刀盘和刀座易变形,常常会出现喷涌、塌方、刀盘被牢牢卡住或刀盘严重磨损等意外情况。为保证盾构的顺利掘进,需采用物探方法探测出隧道沿线孤石分布情况。针对南方地区花岗岩地层特征,采用数值模拟和现场应用试验的方法开展花岗岩风化残留体的地震CT法探测技术研究,经钻探取芯验证与实际较吻合,解决了花岗岩风化残留体的准确探测与定位的难题。提出的一些合理化建议可为今后类似城市地铁工程施工提供参考。
[Abstract]:In the course of urban shield tunnel construction, if shield tunneling encounters granite weathering residual body (commonly known as solitary stone), tunneling construction will be very difficult, shield posture is difficult to control, tool wear is serious, cutter head and tool seat are easily deformed, and often spout will occur.Collapse, cutter head is firmly stuck or serious wear and tear of the cutter head and other accidents.In order to ensure the smooth excavation of shield, the distribution of solitary rock along the tunnel should be detected by geophysical exploration.According to the characteristics of granite strata in southern China, the seismic CT detection technique of granite weathering remains is studied by numerical simulation and field application test.The problem of accurate detection and location of granite weathering remains is solved.Some reasonable suggestions can be provided for the construction of similar urban subway projects in the future.
【作者单位】：中铁隧道勘测设计研究院;中国地质大学(武汉);
【分类号】：U452.11

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