利用第六代ASIS装置研究砂土的工程力学性质

土的直剪试验是确定土体强度的重要试验,所得土体的基本强度参数对于所处地区拟建建筑的工程材料选择及工程设计具有至关重要的意义,国内实验室大多使用的传统直剪装置仍需手动加载,切向与法向应力所受影响因素较多,人为导致试验失败机率相对较大。俄罗斯ASIS装置(6代)采用计算机控制气压装置自动增加载荷,所得强度参数由计算机实时显示,信息自动化优势明显,所受影响因素相对较少,所得试验数据更加准确。该文以两个砂土样本为主要研究对象,利用ASIS装置研究砂土的内摩擦角及粘结力等工程力学性质及其相互影响关系。

The direct shear test of soil is an important test to determine the strength of the soil.The basic strength parameters of the obtained soil are of vital importance to the selection of engineering materials and engineering design of the proposed building.The traditional direct shearing devices used in domestic laboratories still need to be manually loaded.The tangential and normal stresses are affected by many factors,and the probability of artificial failure is relatively large.The Russian ASIS device(6th generation)uses computer-controlled air pressure device to automatically increase the load.The obtained strength parameters are displayed by the computer in real time.The information automation has obvious advantages,and the affected factors are relatively few.The obtained test data is more accurate.This paper takes sand as the main research object,and uses the ASIS device to study the engineering mechanical properties of sand such as internal friction angle and cohesion.