新型压入式大量程旁压探头的研制  

Development of a new type of press-in large-range pressuremeter probe

作　　者：李宗龙 刘皓 何志攀 倪明孚 王汉武[2] Li Zonglong;Liu Hao;He Zhipan;Ni Mingfu;Wang Hanwu(PowerChina Kunming Engineering Corporation Limited,Kunming Yunan 650051,China;Key Laboratory of Geomechanics and Geotechnical Engineering of Changjiang River Scientific,The Ministry of Water Resources,Wuhan Hubei 430010,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司,云南昆明650051 [2]长江科学院水利部岩土力学与工程重点实验室,湖北武汉430010

出　　处：《山西建筑》2025年第8期69-72,共4页Shanxi Architecture

基　　金：中央级公益性科研院所基本科研业务费(项目编号:CKSF20241006/YT)。

摘　　要：针对软土地基具有强度低、变形大、易扰动等特点,结合薄壁式取土器的结构原理,研制了一种新型压入式大量程旁压探头。试验过程中采用静压或锤击的方式将旁压探头送至测试位置,具有操作简单、试验成本低、防止孔壁塌陷等优势。详细介绍了该旁压探头的设计思路、结构原理及细部构造,并通过该装置及加载控制系统对某地区重塑淤泥质粉质黏土进行了室内旁压模型试验。试验结果表明,压入式旁压探头拥有较大的膨胀变形量,能获得较为完整的旁压曲线,为软土的旁压试验提供了有效的试验设备及方法。In response to the characteristics of soft soil foundations,such as low strength,large deformation,and easy disturbance,a new type of press-in type pressuremeter probe has been developed.This probe is delivered to the test location by static pressure or hammering,effectively avoiding issues such as soil disturbance,hole wall collapse,and excessive calibration stress.Finally,parallel model tests were conducted using both the traditional Menard pressuremeter and the new press-in type pressuremeter.Test results show that the press-in type pressuremeter probe has a larger expansion deformation capacity,causes less disturbance to the soil during the test,and measures higher values for pressuremeter modulus and bearing capacity characteristic values than the Menard pressuremeter,thereby reflecting the mechanical properties of the soil more accurately.The press-in type pressuremeter offers large deformation,simple operation,and high test precision,providing a more effective testing device and method for pressuremeter tests on soft soil foundations.

关 键 词：旁压试验 软土地基 旁压模量 旁压探头 

分 类 号：TU413.9[建筑科学—岩土工程]