Multifunctional detection rod-free in-situ static force test system and using method

Abstract

The invention discloses a multifunctional detection rod-free in-situ static force test system and a using method. Synchronous penetration of a static sounding probe and a casing pipe can be realized by the system and the using method without using a detection rod, and a technical flow process is simplified; a lateral loading test can be directly performed by using a sounding hole, and a sounding hole test and a lateral loading test are organically combined and do not affect each other; in a hard layer, the side wall resistance is reduced by processes, such as casing tube rotation process and folding type reaming bit reaming process, so that the sounding depth is increased; a probe can be subjected to static penetration without rotation by driving a single-acting joint by pressure, so that the accuracy of static force test data can be guaranteed. The system and the method have the outstanding advantages that the current test program is simplified, the production efficiency is improved, and the exploration cost is reduced.

Description

technical field [0001] The invention belongs to the field of in-situ testing of geotechnical engineering, in particular to a multifunctional non-probe rod in-situ static testing system and a use method thereof. Background technique [0002] Static CPT technology is widely used in geological exploration because of its advantages of continuous and reliable testing. [0003] The conventional cable penetration testing process includes the following basic steps: (a) use static pressure to penetrate the static penetration penetration probe into the formation through the probe rod at a uniform speed; (b) in order to avoid bending deformation of the probe rod, insert The static penetration probe is lifted away from the penetration hole, and the casing is pressed into the penetration hole at a certain distance above the bottom of the hole; (c) the probe rod and its static penetration probe are continuously penetrated into the formation along the casing at a uniform speed, Repeat thi...

AI Technical Summary

Problems solved by technology

[0005] From the above basic steps, it can be seen that conventional cabled or cableless static penetration has the practical problem that the static penetration probe and the casing cannot be penetrated synchronously, thus affecting the penetration efficiency

[0006] In addition, the side pressure test is a common method for horizontal load tests in geological surveys, especially in urban rail transit surveys. However, there is a practical problem that the aforementioned penetration holes cannot be directly used for side pressure tests and a separate hole must be drilled, which makes the test process cumbersome. , high testing cost and low efficiency

Images