Damage Model and Experimental Study of a Sand Grouting-Reinforced Body in a Seawater Environment
Damage Model and Experimental Study of a Sand Grouting-Reinforced Body in a Seawater Environment
复制标题
海水环境下砂浆注浆加固体损伤模型及试验研究
DOI：
10.3390/w12092495
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发表时间：
2020-09-01
期刊：
影响因子：
3.4
通讯作者：
Zhang, Pengfei
中科院分区：
文献类型：
--
作者：
Wang, Hongbo;Liu, Quanwei;Zhang, Pengfei
富水砂层是海洋地下工程中常见的地层。灌浆是一种用于土壤或岩石密封的技术，是解决渗水问题的方法，可用于解决富水砂层中的地质挑战。灌浆加固体由于海水的长期侵蚀而劣化，导致固体性能的衰减。获得注浆加固体性能的衰减规律，可以保证地下结构在长寿命周期内的安全运行。为此，通过描述海水侵蚀后的固体损伤，分析了注浆加固体的应力-应变曲线以及损伤变量与内部微裂纹和孔隙的关系。在此基础上，建立了海水环境中固体损伤的本构模型。通过设计室内注浆加固试验和加速劣化试验，得到了外加剂劣化后的应力-应变曲线。最后，确定了海水环境中砂层加固体变质的本构模型。该研究对于完善海水环境下隧道劣化理论，保证隧道运营的长期安全具有重要意义。
A water-rich sand layer is a common stratum in marine underground engineering. Grouting is a technology for soil or rock sealing, a method to solve the water seepage problem, and can be used to solve geological challenges in water-rich sand layers. A grouting-reinforced body deteriorates by the long-term erosion of seawater, resulting in attenuation of the performance of the solid. Obtaining the decay law of the performance of the grouting-reinforced body can guarantee the safe operation of the underground structure over a long life cycle. To this end, by describing the solid damage after seawater erosion, the stress–strain curve and the relationship between the damage variable and the internal micro-cracks and pores in the grouting-reinforced body were analyzed. Then, a constitutive model of the solid damage in the seawater environment was established. The stress–strain curve of added solid after deterioration was obtained by designing an indoor grouting reinforcement test and an accelerated deterioration test. Finally, the constitutive model of the sand layer plus solid deterioration in a seawater environment was determined. This research is of great importance for improving the deterioration theory under a seawater environment and ensuring the long term safety of tunnel operations.