| Cite this article: | 李明,高金花,张浩,等.盐渍土固化U形渠道材料优化和数值模拟研究[J].灌溉排水学报,0,():-. |
| liming,gaojinhua,zhanghao,et al.盐渍土固化U形渠道材料优化和数值模拟研究[J].灌溉排水学报,0,():-. |
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| Study on Material Optimization and Numerical Simulation of U-shaped Channel with Solidified Soda-Saline Soil |
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liming1, gaojinhua1, zhanghao1, sunfangcheng2, gaoyinzhe3
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1.Changchun Institute of Technology;2.Jilin Songyuan irrigation area Engineering Construction Co., Ltd;3.Jilin Baishan powerplant of Song Huajiang hydropower Co.,Ltd
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| Abstract: |
| 【Objective】Study the engineering characteristics of new material curing saline soil, design U-shaped channel components based on this mixture and optimise its structure to solve the problems of dissolution and erosion damage and water wastage arising from unlined channels in the saline soil areas of western Jilin.【Method】Improvement of saline soils using self-developed frost-crack resistant curing agents, curing agents were set at 20%, 25%, 30%, 35%, 40%, 45%,the specimens were prepared by combining 14%, 16%, 18% and 20% moisture content of saline soil material for each dose,indoor unconfined compressive strength tests, freeze-thaw tests and permeability tests were conducted to determine the optimum material ratio for this parameter range, on this basis, Abaqus simulations were applied to analyse the stress and displacement states of the 2 m U-shaped channel elements under three operating conditions (lifting point location and lifting point method, external fill pressure and full water operation in the channel, and freezing and swelling due to temperature changes).【Result】Optimum material ratio of 40% curing agent and 16% initial moisture content, the strength of the specimen was 14.91 MPa at the optimum age of 28 d. the loss of quality of specimens subjected to more than 200 indoor freeze-thaw cycles was less than 5%. permeability coefficients to the level of 10-7cm/s. Maximum principal stress of 87.4KPa and maximum displacement of 0.08 mm for a 2m length U-shaped channel member using a two-point lifting of the bottom force. A maximum principal stress of 94.32 KPa and a maximum displacement of 2.85 mm under full water operating conditions. The maximum principal stress considering the effect of frost heave under temperature was 310 KPa and the maximum displacement was 17 mm.【Conclusion】Under the present test conditions, optimum material ratio of 40% curing agent. The U-channel structure with this material ratio has low force and displacement deformation and good stability for different working conditions in the numerical simulation analysis. The results of the study can be used as a reference for curing saline soil U-shaped channels and construction in western Jilin and similar areas. |
| Key words: U-shaped channel;material optimization;numerical simulation;saline soil solidification |
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