Method for simultaneously determining pile position and critical depth of anti-slide pile by using displacement monitoring

Abstract

The invention discloses a method for simultaneously determining a pile position and a critical depth of an anti-slide pile by using displacement monitoring, which is applicable to determining and designing the pile position and the critical depth of the anti-slide pile on an accumulated layer landslide. The method comprises the following steps of: (1) performing investigation, analysis and evaluation aiming at the geology of a side slope to be managed to determine a landslide body region; (2) dividing grids on the landslide body and selecting a displacement monitoring point position; (3) monitoring equipment mounting and displacement monitoring; (4) determining a synthetic total displacement value S (i, j) and vertical displacement direction rate of each monitoring point of landslide displacement; (5) determining landslide instability property and an anti-slide pile space reinforcement position; (6) determining the critical depth of a shearing slip band of the landslide body; (7) determining the pile length of the anti-slide pile of the landslide; and (8) performing information construction of the anti-slide pile. The method has the advantages of less investment cost, reliable design principle, high position determination accuracy, easiness, convenience, fastness, easiness in implementation and strong engineering applicability.

Description

technical field [0001] The invention relates to a method for simultaneously determining the pile position and critical depth of an anti-slide pile, in particular to a method for simultaneously determining the pile position and critical depth of an anti-slide pile by using displacement monitoring. The invention belongs to the technical field of evaluation and prevention of geotechnical engineering slope and landslide geological hazards. Background technique [0002] In geological landslide control engineering, the simultaneous determination of the spatial position and critical depth of landslide anti-slide piles is the primary condition and plays a vital role in the design of landslide prevention and control engineering, and is an important key factor for the success of landslide prevention and control projects. At present, the determination and design methods of the spatial position and pile length of landslide anti-slide piles generally have the following several methods: o...

AI Technical Summary

Problems solved by technology

[0003] From the above analysis methods, it can be seen that the drilling and geophysical prospecting method has large investment and time-consuming, and the landslide slope itself will inevitably be disturbed and damaged during the investigation process, so it is difficult to completely explore the thickness of the soil under the entire landslide slope area, and The spatial location of the anti-slide piles cannot be determined; the limit equilibrium method needs to assume the pile-soil stress and the slope shear slip zone, and the slip body itself is simplified to an isotropic body. At the same time, the slope stability analysis and The anti-sliding force is calculated separately, which makes the calculation process cumbersome; the finite element numerical analysis method to determine the spatial position and pile length of the anti-sliding pile is based on the condition that the reasonable constitutive relationship and the accurate physical and mechanical parameters of the soil layer are clearly known, and Due to the limitations of sampling and test conditions, it is difficult to obtain accurate physical and mechanical parameters of rock and soil, and it is difficult to truly reflect the actual situation of landslide slopes. The results are easily affected by the above factors, finite element software "black box" and human factors. In addition, there are limitations such as cumbersome calculation process, large amount of calculation and long calculation time. Most of the methods stay in determining the fuzzy displacement field. The displacement obtained cannot represent the real displacement change of the landslide, and the entire landslide slope area cannot be effectively determined. The spatial position and pile length of the anti-slide pile, and the determination of the pile length is difficult to guarantee its rationality

Images