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Yang H.S.,Kunming University of Science and Technology | Peng X.L.,Kunming University of Science and Technology | Fu B.C.,Kunming University of Science and Technology | Yang Y.L.,Kunming Survey Design and Research Institute Co. of CREEC | And 3 more authors.
Applied Mechanics and Materials | Year: 2014

Effective unit weight, inner friction angle and cohesion are the main engineering indices of rock-soil mass anti-slide. Deviant leakage brings about obvious decrease of effective unit weight, inner friction angle and cohesion under combined action of thrust, buoyancy, and lubrication. So as to slip in unstable rock-soil mass. Deviant leakage schleps out weensy particles, induces seepage failure, so geotechnical engineering would collapse. Therefore the reasonable anti-leakage in unstable mountain is one of the key technologies that urgently to be solved in geotechnical engineering. Combined with the typical landslide geology, several groundwork anti-leakage were studied for earth-rock dam, correlative processes and technologies were discussed, and construction parameters were designed. The abnormal situations that may occur in construction were analysed, and preparative schemes were put forward. The results had been validated in practical engineering. © (2014) Trans Tech Publications, Switzerland. Source


Yang H.S.,Kunming University of Science and Technology | Pu Y.J.,Kunming University of Science and Technology | Yang Y.L.,Kunming Survey Design and Research Institute Co. of CREEC | Peng X.L.,Kunming University of Science and Technology | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

Found on data of accelerated life test, the relationship between outward disease of structural concrete and holistic deterioration of building was analysed. The results indicated that: outward diseases of structural concrete, such as abrasion, scour erosion, and peeling, carbonization etc, are not hypostatic breakage for holistic building, so could not be regarded as the key points of deterioration identification at building. Deterioration appraisement should be focused on detections of engineering indices relating to structural inbeing quality and analyses of multifarious remainder relating to bearing capacity. Only in this way, deterioration degree of structural concrete and efficacious repair indices could be factually incarnated. Ground on testing multifarious bearing capacities, deterioration identification of concrete buildings was founded, and remedy principles corresponding to inbeing deterioration indices were put forward. © (2014) Trans Tech Publications, Switzerland. Source


Yang H.,Kunming University of Science and Technology | Wang Y.,Kunming University of Science and Technology | Fu B.,Kunming University of Science and Technology | Yang Y.,Kunming Survey Design and Research Institute Co. of CREEC
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2014

Mutually demolishing and eroding occur between the alkaline reinforcement material and the acidic laterite. The alkali erosion tests were designed for laterite based on the chemical analysis of the materials and the principle of life acceleration. The content changes of the effective ions representing the losses of crucial substances in laterite were detected from the leachate from the eroded laterite of the control experiments. Main engineering indices were tested on virgin and eroded laterite to obtain the degradation of the engineering qualities of laterite. The relationships between the ion contents and the engineering indices were established and analysed. The relationships between the engineering indices and the losses of chemical substances were studied using the stepped regression analysis of multiple variables. The effect of effective ions on engineering quality was thoroughly discussed with the relationships derived. Significant quantitative correlations exist between the changes of main engineering indices and the losses of chemical substances in laterite eroded by alkali. Degradation mechanism of the laterite eroded by alkali was revealed, which may be useful for analyzing the speed and trend of deterioration in laterite engineering. Source


Yang H.-S.,Kunming University of Science and Technology | Yang Y.-L.,Kunming Survey Design and Research Institute Co. of CREEC | Yan Y.-Z.,Kunming University of Science and Technology | Wang Y.,Kunming University of Science and Technology | And 2 more authors.
Jianzhu Cailiao Xuebao/Journal of Building Materials | Year: 2013

The alkaline viscous substances used as reinforcement have engendered long-term erosion of laterite groundwork. Scene-sampling and archetype-testing were executed in a geotechnical engineering project. Chemical erosion of laterite by alkaline material were investigated, and accelerated life tests were designed for laterite eroded by alkaline materials. Engineering factors were compared and concentrations of seeping support-ions were tested for studying laterite eroded by alkaline viscous substances. Mechanism of laterite groundwork eroded by alkaline viscous substances was established. The chemical reactions are important cause for reduction of laterite groundwork life and long term economic benefit, and even can cause catastrophic accident. Source

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