古墓垂直防渗帷幕安全深度的优化设计

Optimal Design about the Safety Depth of Vertical Anti-seepage Curtain in Ancient Tombs

古墓作为特殊的文物保护群体,在实施保护时尤其要注意原状维护和病害防治。地下水渗漏问题已经发展成为古墓最主要的病害之一,目前的治理方法主要是在古墓周边布置垂直防渗帷幕,形成不透水地下连续墙。对防渗帷幕的安全深度进行优化设计成为解决影响防渗效果和工程造价问题的关键。结合地下水渗流理论,分析防渗帷幕深度的主要影响因素,以墓室底部土体不发生渗透破坏为控制条件计算垂直防渗帷幕插入深度,并通过工程实例利用ANSYS软件模拟地下水渗流场,对理论计算结果进行验证。结果表明:理论计算得出的古墓垂直防渗帷幕安全深度是可靠的,且满足刘崇墓古墓的防渗保护要求。

Ancient tombs are a special group of cultural relics,of which the original state maintenance and disease control should be paid more attention to.Groundwater seepage problem has become one of the main diseases,and the treatment at present is mainly arrangement of vertical anti-seepage curtain aimed at forming impermeable underground continuous wall.To obtain the optimal design of the safety depth of the antiseepage curtain becomes the key to solving the problem of seepage control effect and engineering cost.Combined with the groundwater seepage theory,this paper analyzes the main influencing factors of antiseepage curtain depth,and calculates the safety depth of the vertical anti-seepage curtain by taking the nonoccurrence of the seepage failure as a control condition,and also testifies the theoretical calculation results by adopting the ANSYS software to simulate the groundwater seepage field through a project case study.The results indicate that the theoretical calculation of the safety depth of vertical anti-seepage curtain is reliable,which satisfies the requirements of the anti-seepage prevention of ancient Liuchong tombs.