Multifunctional geogrid pull-out test device and use method

Abstract

According to a multifunctional geogrid pull-out test device and a use method provided by the invention, a pull-out device assembly and a pressure device assembly can be used for effectively carrying out pull-out and pressing work on the geogrid in a soil loading box, so that the magnitude, direction and speed of pull force and pressure can be more quickly and stably controlled; the device simulation is more in line with the actual engineering condition, the pull-out device assembly, the pressure device assembly and the soil loading box are correspondingly assembled on a pull-out device placing support, a pressure device placing support and a soil loading box placing platform of a test device support respectively, space is provided for the pull-out and pressing test of the geogrid, and the test efficiency is improved. According to the invention, the plate pulling test of the geogrid is effectively realized, the contact properties of the geogrid and a soil body under different conditions are more accurately measured through the pull-out device assembly and the pressure device assembly, and the device can be used for the pull-out test of pulling the geogrid out of the soil body and can also be used for the pull-out test of pulling other synthetic materials out of soil.

Description

technical field [0001] The invention relates to the technical field of a pull-out test device for geosynthetic materials, in particular to a multi-functional geogrid pull-out test device and a use method. Background technique [0002] Geogrid is a kind of geosynthetic material, which is widely used in soft soil foundation reinforcement, retaining wall and pavement anti-crack engineering construction of highway, railway, bridge abutment, approach road, wharf, revetment, dam, slag yard, etc. In the design and calculation analysis of reinforced soil structures, the required interface friction parameters between soil and reinforcement are usually determined by pull-out tests. Among them, the one-way or two-way geogrid pull-out test using a pull-out direct shear instrument has become an important means to simulate the reinforcement behavior of the reinforcement in the reinforced soil structure. [0003] As a new type of geosynthetics, geogrid needs a series of performance tests ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art that cannot satisfy the rapid change of the pulling force and the control of the pulling speed, the present invention provides a multi-functional geogrid pulling test device and its use method. The device has a simple structure and can effectively provide convenient and fast , controllable pressure and tension, so as to more accurately apply pressure to the soil, exert tension on the geogrid, and better simulate the state of the geogrid embedded in the soil in the actual project

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