Abstract The first underground research laboratory (URL) as the platform for deep geological disposal of high-level radioactive waste (HLW) in China is being built a granite rock mass. damaged characteristics and mechanical properties under loading seriously influence URL’s construction safety function HLW. Therefore, this paper investigates Beishan used various confining pressure levels through series triaxial compression acoustic emission (AE) tests. Based on crack volumetric strain model,...

The use of the piezocone penetration test (CPTU) in a geotechnical site investigation offers direct field measurement on stratigraphy and soil behavior. Compared with some traditional methods, such as drilling, sampling inspecting method or laboratory procedures, CPTU can greatly accelerate work hereby reduce corresponding operation cost. undrained shear strength is key parameter estimation stability natural slopes deformation embankments soft clays. This paper provides measurements situ...

This study presents an investigation of the cyclic freeze–thaw (F/T) effects on dynamic and static splitting-tensile properties plain cemented clay (clay mixed with 15% cement) basalt fiber–reinforced (BFR) 1.5% fiber cement). The were evaluated by focusing tensile strength, absorbed energy, strain rate two different clays at 0, 1, 3, 6, 9, 12 F/T cycles using a test splitting Hopkinson pressure bar (SHPB) test. experimental results showed that addition led to marked increase in strength...

Abstract The shear strength of sand increases with decreasing degree saturation. This study attempts to develop a more effective biogas desaturation method mitigate liquefaction sand. microbial denitrification process Pseudomonas stutzeri, which produces nitrogen gas, was selected for inducing partially saturated First, research undertaken verify the performance demonstrate feasibility utilizing P. stutzeri. Compared existing methods using biogas, reducing time nitrate and nitrite less in...

Carbonation technology using MgO and CO2 has been considered a rapid, effective, environmentally friendly method for improving weak soils, mainly applied in shallow foundation treatments. This study introduced novel MgO-carbonated composite pile (MCP) technique developed by injecting through gas-permeable pipe into MgO-mixing column carbonation solidification its applications subgrade Several field tests were carried out to the characteristics of MCP as well performance MCP-reinforced...

The main objective of this study is to evaluate the disintegration characteristics loess after treatment by vibratory probe compaction method. To establish connection between velocity soil and other parameters, a series indoor in situ tests was conducted, including density test, compression direct shear collapsibility standard penetration test (SPT) cone test. results showed that great improvement resistance samples wetting obtained treatment, its (0.2%/s) had larger reduction 75.85%...

Bedding planes are the fundamental causes of anisotropic deformation and mechanical behaviors in slate, which will have great influence on tunnel stability. In order to analyse stability surrounded by well-foliated slate eastern Guizhou was taken as specimen tests. Microscopic analysis test results show that can be regarded a special continuous material. During test, shear strength parameters progressive failure varied when direction bedding plane changed, two sets reasonable were achieved...

Carbonation using reactive MgO is employed for treating soft soils, which has received attention in the ground improvement as an innovative technology. This manuscript studies influence of initial water content on engineering properties carbonated soil admixed with MgO, including physicochemical and strength characteristics. The natural silty soils treated (20%) different contents (from 15% to 30%) were carbonized by carbon dioxide (CO2). Afterwards, their unconfined compression strengths...

Abstract Currently, the treatment of miscellaneous fill foundations, composed a mixture domestic garbage, construction solid waste, and natural soil, presents significant challenge in urban peripheral engineering construction. This paper discusses application vibrating rod compaction technology for foundation Xinjiang. It evaluates effectiveness cross-section equipment reinforcing fine-grained foundations. The study analyzes impact disturbances caused by insertion rod, monitoring horizontal...

This study improved the vibratory probe compaction (VPC) technique by combining it with well-point dewatering to address challenges of treating newly dredged silt ground. Specific methods were presented determine operating frequency based on multi-channel analysis surface waves (MASW) results, as well spacing between points derived from vertical vibration velocity measurements. The effects analyzed through field monitoring groundwater level, pore water pressure, and ground settlement. A...

In this paper, existing methods for interpreting coefficient of consolidation in clays from piezocone dissipation tests are briefly reviewed. Piezocone have been conducted at different sites Jiangsu province China. were performed penetration depths. Two interpretation made on the CPT data analyzing both monotonic and dilatory pore pressure decay behaviors. The interpreted values compared with reference cv determined laboratory oedometer tests. It is shown that generally four times larger...