Method for monitoring abnormal differential settlement of metro station close to soluble rock site
A differential settlement and settlement monitoring technology, applied in measurement devices, surveying and navigation, height/level measurement, etc., can solve problems such as loss, affecting the safety of subway stations, unable to explain the reasons for differential settlement of subway stations, etc. The effect of saving cost and saving construction period
Inactive Publication Date: 2019-11-01
POWERCHINA RAILWAY CONSTR +1
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Problems solved by technology
[0006] (1) Existing monitoring items cannot explain the reasons for the differential settlement of subway stations
[0007] (2) The reason for the abnormal settlement of the subway station is unknown, and the construction of the main project of the station was once stopped, which may affect the safety of the subway station and cause losses
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[0028] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0029] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0030] Such as figure 1 As shown, the method for monitoring the abnormal difference settlement of the karst site close to the subway station provided by the embodiment of the present invention includes the following steps:
[0031] S101: Arrange geological boreholes J1 and J2 at positions with large abnormal settlement next to the retaining piles and foundation pits of the station. The drilling depth is not less than 50m. On the one hand, review the construction quality of the retaini...
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The invention belongs to the technical field of building settlement monitoring, and discloses a method for monitoring abnormal differential settlement of a metro station close to a soluble rock site.The method comprises the steps of: deploying geological drill holes J1 and J2 at locations with relatively large abnormal settlement next to a station guard post and a foundation pit, wherein the depths of the drill holes are not less than 50m, reviewing the construction quality of the guard post, and further reviewing formation lithology, geological structure and other information of the site; performing full-section intra-hole television in the constructed geological drill hole J2 to intuitively judge the formation lithology, fissures, weak layers and hole development conditions of the site;selecting influence factors that may cause the settlement, adding drill holes, and drilling to different geological condition final holes; and deploying settlement monitoring points in the drill holes J1-J4; and monitoring the settlement of rock stratums at different depths. By implementing the method disclosed by the invention, the cause of settlement of the station is successfully found, a technical support is provided for handling the differential settlement of the subway station, the safety of the subway station is ensured, 6 months of construction period is saved, and tens of millions ofmanufacturing cost is reduced.
Description
technical field [0001] The invention belongs to the technical field of building settlement monitoring, and in particular relates to a method for monitoring abnormal difference settlement of a soluble rock site close to a subway station. Background technique [0002] The excavation depth of the foundation pit of a subway station is about 20m, and it is supported by reinforced concrete inner support. Moderately weathered mudstone (thickness 16m), soluble rocks develop below the mudstone. During the construction process, the retaining piles experienced local differential settlement. After the warning value was reached, the settlement of the station floor was increased. Finally, the differential settlement of the pile tops on both sides of the station reached a maximum of 90mm, and the settlement of the station floor reached 30mm, and the settlement rate did not show a decreasing trend. , is still under development. The monitoring items that have been adopted mainly include su...
Claims
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Login to View More IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 祝全兵任跃勤宋立平孟庆明周建辉李霄瞿加俊吴宗林徐跃斌黄钞胡海明陈洪杰李棋张玉林宋崔蓉
Owner POWERCHINA RAILWAY CONSTR