Rock landslip waterpower starting indoor simulation test method

Abstract

The invention discloses a rock landslip waterpower starting indoor simulation test method, which belongs to the field of geology calamity forecast technology. The method includes the following steps: a rock test piece containing a real potential slip surface is fetched; the potential slip surface is regarded as the boundary; upper and lower rocks are respectively filled into a sample frame and a sample box, and a cement and a mortar are filled into the sample frame and the sample box; component forces of the gravity parallel to the slip surface and vertical to the slip surface of a simulationlandslip leading edge part to be simulated are regarded as the transverse load initial value and the vertical load initial value; the water pressure of underground water in a slope to a potential slip body in reality is replaced by maintenance of the transverse load and reduction of vertical load value on the potential slip surface; when the displacement rates of the upper sample frame of the rock test piece and an upper rock of the potential slip surface solidified in the frame relative to the potential slip surface are suddenly increased and continuously increased, the landslip is already started, meanwhile the accumulation minimizing amount of vertical load value is equal to the water head height value, that is the starting water head value of the simulation rock landslip. The method can relatively accurately discover the impending landslip state of rock slope.

Description

technical field [0001] The invention relates to a rock landslide simulation test technology in the technical field of geological disaster forecasting, in particular to a simulation test technology for a rock landslide breeding and start-up process under the action of gravity and groundwater pressure. Background technique [0002] In the past, when people carried out indoor simulation tests of rock landslides, most of them first took rock samples from the slide body, processed the samples into cylinders or squares indoors, and carried out physical and mechanical parameter tests on them, and then based on the principle of similarity The test parameters are scaled to the simulation parameters, and barite powder, gypsum powder, paraffin oil, talc powder, etc. are selected to form similar materials in different proportions to simulate the failure process of the landslide. See "Research on Geomechanics Model Test of Qianjiangping Landslide in the Three Gorges Reservoir Area" in "J...

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Problems solved by technology

The disadvantage of this simulation method is that it is difficult to ensure the sameness of the reduction factor of various parameters (such as mass); the second is that it is difficult to say that it still has the same effect on the interaction process and deformation and failure process between the changed material and the reduced external force. The structural characteristics of the prototype and the actual process of rock mass slippage can be reflected; third, this type of model test is often complicated, time-consuming and labor-intensive

Through the collection and research of previous data and a large number of field investigations, we found that the occurrence of rock landslides is closely related to groundwater pressure, and the aforementioned simulation method is a simulation of the damage process after the occurrence of rock landslides, and cannot simulate the process of rock landslides. The relationship between inoculation start-up process and various external forces (especially water pressure)

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