广西航运枢纽工程新近系泥岩岩土参数取值  

Parameter values of Neogene mudstone rock in Guangxi shipping hubproject

作　　者：韦世贵 WEI Shigui(Guangxi Traffic Design Group Co.,Ltd.,Nanning 530029,China)

机构地区：[1]广西交通设计集团有限公司,广西南宁530029

出　　处：《水运工程》2023年第11期198-203,共6页Port & Waterway Engineering

基　　金：国家自然科学基金面上项目(52268062)。

摘　　要：由于第三系泥岩地层时代新、成岩差、岩性软弱、模量低、强度低、承载力不高,特别是在卸荷或开挖暴露后易受环境条件影响,岩体的工程地质性质变化大,常规的岩石试验方法得到的指标往往比真实值低。依托广西航运枢纽工程,现场开展岩体载荷试验、钻孔声波速测试和旁压试验,研究广西新近系泥岩的地基容许承载力。采用SPSS数据分析软件,对地基容许承载力、钻孔纵波波速、岩体完整性系数的相关性进行分析,最终得出相关公式,可通过钻孔声波速测试间接获取新近系泥岩的地基容许承载力。研究可为类似工程提供借鉴和参考。The engineering geological properties of the rock mass change greatly because of the neodiagenesis,diagenesis difference,lithology weakness,low modulus,low strength and low bearing capacity of the Tertiary mudstone strata,which are susceptible to environmental conditions especially after unloading or excavation exposure,and the index obtained by conventional rock test methods is often lower than the true value.In this paper,according to the rock mass loading test,borehole acoustic wave velocity test and side pressure test carried out on site in Guangxi shipping hub project,the allowable bearing capacity of the foundation of the Negene mudstone in Guangxi is studied.SPSS data analysis software is used to analyze the correlation between the allowable bearing capacity of the foundation,the longitudinal wave velocity of the borehole and the rock mass integrity coefficient,and finally the relevant formula is obtained.The allowable bearing capacity of Neogene mudstone foundation can be obtained indirectly through borehole acoustic wave velocity test.The research can provide reference for similar projects.

关 键 词：岩土参数 载荷试验 旁压试验 地基容许承载力 岩体完整性系数 

分 类 号：U612[交通运输工程—船舶及航道工程]