Novel soil radial expansion rate tester and using method thereof

Abstract

The invention relates to a novel soil radial expansion rate tester and a using method thereof. A displacement tester is arranged in a test piece inner ring by setting a circular test piece, so that the radial expansion rate is determined inside the test piece, and a traditional mode for determining the expansion deformation of a soil body from the outer side of the test piece is changed; a hoop is arranged outside the circular test piece, and the tester is arranged in the inner ring, so that the conflict between the arrangement of the tester and the lateral confinement of a rigid ring cutter in conventional radial expansion rate determination can be overcome, the dependence on a flexible consolidation meter and consolidation rings with different rigidities can be eliminated, the rigidity testing precision and complicated operation problems can be avoided, and the operation is simple, convenient and fast; a water injection device is improved, so that water can permeate gradually to the middle from the upper end and the lower end only, and a tested soil body of the inner ring is prevented from collapsing, disintegrating, chipping, softening and the like. A framework device consisting of a base, an upper cover, a screw rod and a bolt can be fixedly and vertically displaced during the testing, so that the test piece is prevented from generating vertical expansion deformation and the testing precision can be guaranteed.

Description

technical field [0001] The invention relates to a novel device for measuring the radial expansion rate of soil and its application method. Background technique [0002] As a special rock and soil, expansive soil is widely distributed in my country, which seriously restricts the construction of infrastructure in my country. At the same time, as an ideal buffer and backfill material for nuclear waste, the measurement of its expansion force and expansion deformation is particularly important. The test methods adopted in the existing codes are mainly expansion back pressure method, pressurized expansion method and balanced pressurized method. It is necessary to obtain the situation where the soil body is allowed to have radial or lateral displacement, but its expansion rate cannot be accurately determined. [0003] In recent years, experts and scholars at home and abroad have improved and developed flexible consolidation instruments based on different consolidation ring stiffne...

AI Technical Summary

Problems solved by technology

The test methods adopted in the existing codes are mainly expansion back pressure method, pressurized expansion method and balanced pressurized method. It is necessary to obtain the situation where the radial or lateral displacement of the soil is allowed, but the expansion rate cannot be accurately determined

[0003] In recent years, experts and scholars at home and abroad have improved and developed flexible consolidation instruments based on different consolidation ring stiffnesses. There are contradictions and dependence on flexible consolidation instruments and consolidation rings of different stiffnesses, making it difficult to guarantee test accuracy

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