Expansive soil two-dimensional dilatometer

Abstract

The invention relates to an expansive soil two-dimensional dilatometer, and can effectively solve the problem that the expansion deformation and expansion force in both the vertical direction and the lateral direction cannot be measured at the same time by the conventional dilatometer. The expansive soil two-dimensional dilatometer adopting the technical scheme is characterized by comprising a testing stand and a pressure chamber arranged on the testing stand, wherein the pressure chamber adopts a square tubular structure which is provided with a left end opening and a right end opening, and is defined by a bottom plate and a top plate arranged in an up-and-down spaced manner and a front clamping plate and a back clamping plate arranged in a front-and-back spaced manner; the space jointly defined by two side press plates, a pressurizing plate, the bottom plate, the front clamping plate and the back clamping plate forms an accommodating space for a test soil sample; sliding mechanisms are connected with a loading mechanism arranged on the testing stand through flexible ropes; a first displacement sensor is arranged on a pressure transfer plate to be used for measuring the vertical displacement of the pressure transfer plate; second displacement sensors are arranged on force transfer rods to be used for measuring the horizontal displacement of the force transfer rods. The expansive soil two-dimensional dilatometer is novel and unique in structure, simple, reasonable, easy to produce, simple to operate, and low in cost; a test of expansion deformation or expansion force can be carried out by only one instrument, so that the use is convenient, and the effect is good.

Description

technical field [0001] The invention relates to a test instrument, in particular to a two-dimensional dilatometer for expansive soil. Background technique [0002] Expansive soil is a special soil that swells with water, and its expansibility will cause harm to surrounding projects. Therefore, the determination of the expansion deformation of expansive soil under constant load and the expansion force under constant volume is helpful to guide engineering practice. [0003] The traditional expansive soil dilatometer is developed on the basis of the one-dimensional consolidation instrument. It can only measure the vertical expansion deformation or expansion force under confinement conditions, but cannot obtain the lateral expansion deformation or expansion force. However, the triaxial dilatometer modified by the conventional triaxial meter can only measure the volume deformation, and cannot directly measure the lateral deformation, let alone the expansion force. For this reas...

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a two-dimensional dilatometer for expansive soil, which can effectively solve the problem of simultaneously measuring the expansion deformation and expansion force in the vertical and lateral directions by the dilatometer. question

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