论文部分内容阅读
利用研制的膨胀土连续吸水试验装置,得到了强膨胀土连续吸水膨胀过程的测试曲线。通过对试验曲线及试验现象的深入分析,探讨了膨胀土吸水膨胀过程的阶段性、驱动力、膨胀机理等问题。研究结果表明:连续吸水试验装置提供测试膨胀土连续吸水过程的方法;膨胀土吸水膨胀过程的驱动力是黏土矿物颗粒的吸附作用,毛细作用只是起到传输水分的作用;吸附在黏土矿物颗粒表面膨胀土吸水膨胀过程是以黏土矿物颗粒为吸附中心,黏土矿物不断水化的过程;进入土体中的水分一部分存贮在土体孔隙中,一部分形成结合水膜,导致土体膨胀的是吸附在黏土矿物颗粒表面的结合水膜的体积变化。
Using the developed expansive soil continuous water absorption test device, the test curve of continuous swelling process of strong expansive soil was obtained. Through the analysis of test curves and test phenomena, the problems of stage, driving force and expansion mechanism of swelling and swelling process of expansive soils are discussed. The results show that the continuous water absorption test device provides a method to test the continuous water absorption process of expansive soil. The driving force of expansive soil water swelling process is the adsorption of clay mineral particles. The capillary action only plays the role of transporting water. Expansion of soil swelling process is based on clay mineral particles as the adsorption center, the continuous hydration of clay minerals; part of the water into the soil stored in soil pores, part of the formation of a combination of water film, resulting in soil swelling is adsorption Volume change of bound water film on the surface of clay mineral particles.