[CollectionEncyclopedia of Common g

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Original Title: [Collection] Encyclopedia of Common Exploration Techniques and Methods for Landslide This article is selected from the book "Technical Guidelines for Landslide Control". First published on the Wechat Public Number of the Voice of Natural Resources At present, the commonly used exploration techniques and methods of landslide mainly include engineering geological mapping, exploration (drilling, mountain engineering, geophysical exploration), sampling and testing, monitoring and so on. Landslide exploration should select appropriate exploration techniques and methods according to the nature and requirements of the problems to be identified. 5.1 Engineering geological mapping Engineering geological surveying and mapping is the basis of landslide exploration work such as drilling, mountain engineering and geophysical prospecting. It is carried out first in various exploration methods and is an important technical means in the preliminary and detailed exploration stages of landslide. The relevant requirements are as follows. 1) Landslide engineering geological surveying and mapping shall be carried out on the basis of making full use of remote sensing interpretation results and existing regional geological data. The scope of surveying and mapping shall include the landslide section and its adjacent areas. The rear part shall include a certain range of stable slopes or catchment depressions above the back wall of the landslide. The front part shall include stable sections below the shear outlet. Both sides shall reach a certain distance beyond the landslide or adjacent valleys. The wading landslide shall reach the water surface of the river (reservoir) or the opposite bank, which is generally controlled at 50 ~ 100m outside the landslide boundary. At the sn in Chapter IV of this guide for the specific technical requirements of each stage. 3) The engineering geological surveying and mapping method adopts the comprehensive survey method, and the important geological phenomena such as boundary, crack, soft interlayer and shear outlet shall be traced. 4) In the covered or unobvious sections, there should be manual exposure points to ensure the accuracy of surveying and mapping and identify the main engineering geological problems. 5.2 Exploration Landslide exploration techniques mainly include drilling, mountain engineering (well exploration, trenching, tunnel exploration) and geophysical exploration. Exploration is an important part of landslide exploration work, and the workload and working method should be determined according to the complexity of geological conditions in the landslide area. The main task of landslide exploration is to find out the scope, thickness, material composition of the landslide mass, the number and shape of the sliding surface (zone) and the material composition of each sliding zone; basically find out the number, distribution, source and dynamics of groundwater aquifers in the landslide mass and the hydrent monitoring holes are arranged on the main exploration line of the landslide,dth drill bits, and the deep displacement of the landslide is monitored in real time by the borehole inclinometer. Abundant surface and deep displacement monitoring information provides an important basis for landslide stability analysis and information design and construction of control engineering. This article is selected from Technical Guidelines for Landslide Prevention and Control (Yin Yueping et al., Geological Publishing House, 2018). Return to Sohu to see more Responsible Editor:. wt-dthtools.com

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