不同结构强度软粘土的动孔压特性试验研究  

Experimental study on dynamic pore pressure characteristics of structural soft clay

作　　者：陈颖平 黄博[2] CHEN Ying-ping;HUANG Bo(Department of Civil Engineering and Architecture,Wuyi University,Fujian Wuyishan 354300,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]武夷学院土木工程与建筑学院,福建武夷山354300 [2]浙江大学建筑工程学院,杭州310058

出　　处：《齐齐哈尔大学学报（自然科学版）》2021年第2期50-54,共5页Journal of Qiqihar University(Natural Science Edition)

基　　金：国家自然科学基金项目(10372089);福建省教育厅项目(JA09263)。

摘　　要：岩土工程建设中常遇到天然状态、受扰动状态以及经过注浆加固处理的软土,这些结构强度不同的土体在振动荷载作用下的动孔压特性对地基的沉降具有较明显的影响。利用HX-100循环三轴仪对杭州原状、完全重塑以及掺水泥的粘土试样进行循环加载试验,探讨这三类土样的动孔压特性的异同点。试验结果表明:当动应力幅值较小时,三种试样的动孔压均随振次增加而不断升高。当动应力较大时,原状样的孔压增长速率变慢,且最终的累积孔压值也较小,在结构屈服压力下进行固结时这个特点尤为明显。In the construction of geotechnical engineering,soft soil under natural state,disturbed state and grouting reinforcement is often encountered.The dynamic pore pressure characteristics of soil with different structural strengths under the action of vibration load have a significant impact on the settlement of foundation.In this paper,the HX-100 cyclic triaxial equipment was used to conduct cyclic loading tests on the natural,completely remolded and cement-doped clay samples took from Hangzhou,and the similarities and differences of dynamic pore pressure characteristics of these three soil samples were discussed.The test results show that when the dynamic stress amplitude is small,the dynamic pore pressure of the three samples increases with the number of vibration.When the dynamic stress is relatively large,the growth rate of undisturbed pore pressure decreases,and the final cumulative pore pressure is also small,which is especially obvious when the structure is consolidated under yield pressure.

关 键 词：循环荷载 软粘土 结构强度 动孔压 

分 类 号：TU435[建筑科学—岩土工程]