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为研究潮湿环境土遗址加固效果评估方法,在杭州地区进行现场模拟探方加固实验,并对加固后坑壁的波速、含水率、相对水平位移进行监测,对加固的模拟探方稳定性做出评估,以望通过采用科学定量手段评价土遗址夯筑支顶加固效果,为土遗址夯筑支顶加固效果评估提供参考。试验结果表明:模拟探方坑壁表层含水率随深度的增加而升高,含水率变化量逐渐减小;加固后坑壁土体初始强度随深度的增加而提高,且后期硬化过程也较上部区域快,土体强度随时间在逐渐增加;夯筑后坑壁前四五天位移值逐渐增大,且位移值随深度的增加而升高,后期趋于稳定。研究表明,基于变形监测技术评估夯筑体整体稳定性科学合理,基于表层含水量和波速变化评估夯筑土体强度变化是较好的手段。评估结果可为其他潮湿地区土遗址夯筑加固效果评估方法提供参考。
In order to study the method of evaluating the reinforcement effect of the wet soil site, a simulation experiment of on-site simulating exploration in Hangzhou area was carried out. The wave velocity, water cut and relative horizontal displacement of the reinforced pit wall were monitored to make the stability of the simulated simulated probe In order to evaluate the reinforcement effect of rammed earth roof by means of scientific and quantitative methods and provide a reference for the evaluation of reinforcement effect of rammed earth roof. The experimental results show that the surface water content of the pit surface increases with the increase of depth, and the change of water content decreases gradually. The initial strength of the soil wall increases with the increase of depth, and the later hardening process is also higher than that of the upper part In the area, soil strength increased with time. After four days and five days of ramming, the displacement gradually increased, and the displacement increased with the increase of depth and stabilized in the later period. The research shows that it is scientific and reasonable to evaluate the overall stability of the rammer body based on the deformation monitoring technique. It is a good way to evaluate the strength change of rammed soil body based on the change of surface water content and wave velocity. The results of the assessment can provide a reference for the method of assessing the reinforcement effect of soil sites in other humid areas.