1.宁波大学滨海城市轨道交通协同创新中心,浙江 宁波 315211
2.宁波市轨道交通集团有限公司,浙江 宁波 315012
邓岳保(1983—),男,教授,博士。主要从事软土特性、软基处理及能源岩土工程研究。E‑mail: 254967808@qq.com
收稿:2021-10-04,
修回:2021-12-17,
纸质出版:2022-10-28
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邓岳保,韩逸冬,郑良科等.太阳能热排水固结模型试验研究[J].防灾减灾工程学报,2022,42(05):905-912.
DENG Yuebao,HAN Yidong,ZHENG Liangke,et al.Model Test Research on Preloading Combined with Solar Thermal Drainage Consolidation Technology[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(05):905-912.
邓岳保,韩逸冬,郑良科等.太阳能热排水固结模型试验研究[J].防灾减灾工程学报,2022,42(05):905-912. DOI: 10.13409/j.cnki.jdpme.20211120020.
DENG Yuebao,HAN Yidong,ZHENG Liangke,et al.Model Test Research on Preloading Combined with Solar Thermal Drainage Consolidation Technology[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(05):905-912. DOI: 10.13409/j.cnki.jdpme.20211120020.
太阳能热排水固结技术是利用太阳能对软土地基进行加热,再结合竖井排水固结,由此达到提升软基处理效果的目标。为检验该技术加固效果,开展竖井地基排水固结模型试验,对比测试常规堆载预压和太阳能热排水固结加固软基的沉降和孔压发展规律,结果发现:太阳能在模型地基中形成温度场,使地基土温度平均上升了15 ℃;太阳能循环变温引起土中孔压波动,其幅度达10 kPa;太阳能加快了软土地基排水固结过程,使模型地基土体固结系数提升了1.54倍,土层固结度达到90%所需时间减少34%;太阳能加热还使模型地基最终沉降增大12%,这对于加速软基沉降稳定、减小工后沉降有积极意义。
Solar thermal drainage consolidation technology uses solar energy to heat the soft soil foundation, combined with shaft drainage and consolidation, thereby improving the treatment effect of the soft foundation. To test the reinforcement effect of this technology, a model test of drainage consolidation of shaft foundation was carried out to compare and test the settlement and pore water pressure development law of conventional preloading and solar thermal drainage consolidation of soft foundation. The results show that the solar energy forms a temperature field, which increases the temperature of the foundation soil by an average of 15°C; the solar cycle temperature change caused the pore pressure in the soil to fluctuate with an amplitude of 10 kPa; the solar energy accelerates the process of drainage and consolidation of soft soil, and increases the consolidation coefficient of the model foundation by 1.54. The time required for soil consolidation to reach 90% is reduced by 34%; solar heating also increases the final settlement of the model foundation by 12%, which has a positive significance for accelerating the stability of soft foundation settlement and reducing post-construction settlement.
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