Zhaohui Sun

• Doctor of Engineering
• Lecturer at Chongqing Jiaotong University

The emergency control of nuclear contaminated water leakage using artificial ground freezing (AGF) method has good application prospects, but the actual blocking effect is not ideal at present. To promote the solution of this problem, this paper designed a test system for evaluating the impermeability of freezing method, and it conducted blocking s...

Current research on soil–structure interface properties mainly focuses on sand, clay, and silt, with little attention given to sandy gravel. In order to study the effects of relative density and interface materials on the shear behavior of the sandy gravel–structure interface, a series of large-scale direct shear tests on sandy gravel were carried...

Under the influence of seepage erosion and nuclide decay heat release, the frozen soil wall constructed by artificial ground freezing method (AGF) to prevent nuclear leakage is prone to occur local ablation and impermeability failure. To ensure its long-term safety and effectiveness, this study conducted a series of laboratory tests to assess the b...

To improve the problems of permafrost degradation and embankment thermal stability caused by engineering disturbance, the solar direct-drive compression refrigeration apparatus for preventing permafrost degradation was invented based on solar power generation technology and refrigeration technology. The performance of the apparatus was tested by fi...

To accelerate the refreezing time of cast-in-place piles in permafrost regions and improve their long-term stability, this paper proposes a novel TCP based on solar refrigeration. The TCP consists of a solar power system (SPS), a vapor compression refrigeration system (VCRS), and a pile. Then, the cooling effect of the TCP was carried out by the mo...

High-speed railways play an important role in transportation electrification and transportation efficiency. Affected by the high air temperature and strong solar radiation in hot regions, the upper surface of the ballastless track plate on the high-speed railway suffers from high temperatures. The large temperature difference between the upper and...

In order to prevent the degradation of permafrost under subgrade in permafrost area, and test the refrigeration effect of the developed solar driven compression refrigeration apparatus, the field test was carried out in Qinghai Permafrost Research and Observation Base of the Ministry of Transportation. The results show that: the apparatus can conti...

To explore the effects of organic matter (OM) and loading methods on compression and particle breakage behaviors of calcareous sand (CS), a set of one-dimensional (1D) compression experiments were completed with two loading methods of constant rate of strain and incremental loading. Particle size distribution (PSD) analysis and three-dimensional (3...

Direct shear test is one of the common method to study the parameters of shear strength and shear strength of soil. However, the current standard of geotechnical test method does not consider the calculation error caused by the change of shear area during shear process. In this paper, the direct shear test corrected calculation model considering ef...