田螺山地下遗址土排水固结特性试验研究

Experimental Study on Drainage Consolidation Characteristics of Underground Earthen Ruins in Tianluoshan

坑壁滑塌是潮湿环境下田螺山地下开挖土遗址的主要病害之一。遵循土遗址保护原则及滑塌病害特征,提出采用柔性排水木锚杆技术治理土遗址坑壁滑塌病害。该研究通过室内固结模型试验探究柔性排水木锚杆的排水固结效果。主要试验包括:室内常规固结试验,300mm高土柱固结试验,300mm高土柱木锚杆排水固结试验。分析沉降量、孔隙比、固结系数及固结后遗址土的抗剪强度。结果表明排水松木杆对田螺山遗址土有较好的排水固结效果,能够起到提高遗址土抗剪强度的目的,建议进一步研究排水木锚杆与遗址土之间的界面强度特性,为工程应用提供技术支撑。

Pit wall collapse is one of the main defects of Tianluoshan underground worked earthen ruins in humid environment.Following the principles of protection of earthen sites and the characteristics of landslides,the research group proposes to adopt flexible drainage wood bolt technology to control the landslides of earthen sites.This study explores the drainage consolidation effect of flexible drainage wood anchor through indoor consolidation model tests.The main tests include conventional indoor consolidation test,300mm high soil column consolidation test and 300mm high soil column anchor drainage consolidation test.The settlement,void ratio,consolidation coefficient and shear strength of the consolidated site soil are analyzed.The results show that drainage pine rod has better drainage consolidation effect on Tianluoshan earthen ruins,and can improve the shear strength of site soil.It is suggested that the interface strength between drainage wood anchor rod and site soil be further studied to provide technical support for engineering application.