Method for manufacturing test model under strong load of straight wall vault type cavern

Abstract

The invention discloses a method for manufacturing a test model under a strong load of a straight wall vault type cavern. The method comprises the steps of manufacturing of a cavern model, manufacturing and mounting of anchor rods and arrangement of measuring points. The method comprises the following steps: preparing low-grade cement mortar from cement, sand, water and an accelerator according to a weight ratio of 1: 15: 1.6: 0.0166, building a model block in a mold by using the prepared cement mortar, digging a cavity in the model block according to the position and size outline of the cavity, and finely trimming the cavity to a designed size; the method comprises the following steps: simulating a full-length bonding type anchor rod by adopting an aluminum wire, simulating a grouting body for mounting the anchor rod by adopting gypsum slurry, preparing the gypsum slurry according to the raw material weight ratio of gypsum to water to citric acid being 1: 0.65: 0.005, drilling anchor rod holes in a cavern, then injecting the gypsum slurry into the holes, then inserting the manufactured anchor rods, and screwing and fixing bolts on the anchor rods after all the anchor rods are completed; the measuring points mainly comprise a pressure measuring point, a strain measuring point, a displacement measuring point and an acceleration measuring point. According to the grotto model manufactured by the method, the test result has higher reference value.

Description

technical field [0001] The invention belongs to the field of civil air defense engineering, and in particular relates to a method for making a test model of a straight-wall vault-type cavern under strong load. Background technique [0002] At present, there are a large number of previously built civil air defense projects in China, or underground facilities with protective capabilities. These projects were constructed according to the weapon damage standards at that time and the economic strength at that time, and many blasting tests were carried out, and the caverns and reinforced anchors were damaged to varying degrees. Therefore, using today's damage standards to calculate their resistance, their resistance levels are low and cannot withstand enough blows. These projects can no longer meet the requirements of strategic defense under the conditions of modern information technology. [0003] Under the current conditions, the main means of resisting the blow is the rock mas...

AI Technical Summary

Problems solved by technology

However, because the on-site prototype explosion test consumes a lot of manpower, material resources and financial resources, in general, the on-site prototype explosion test is carried out to verify and correct only on the premise of certain accurate prediction of the test results and test content.