塑料排水板内部真空压力的现场测试

摘要

排水板内真空压力大小直接关系土体中有效应力的提高,文中介绍了排水板内部真空压力测试的两种不同方法,并对影响测试结果的因素进行分析.现场观测结果表明,采用直排式真空预压进行地基处理时,排水板内真空压力的衰减很小.%Vacuum pressure in prefabricated vertical drains has direct influence on the effective stress in soil improvement and this paper introduces two different methods in testing vacuum pressure within prefabricated vertical drains and analyzes the factors affecting the test results. The results of the field observation show that using direct vacuum preloading for ground treatment, the vacuum pressure attenuation within prefabricated vertical drains is very small.