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土遗址具有很高的历史价值、科学价值和考古价值,但土的物理力学性质决定了土遗址的脆弱性。因此对现存土遗址进行加固、维修很有必要。以加固前后的台藏塔为例建立了其三维有限元模型,分别考虑关键措施土坯砌筑、灌浆抹缝、锚杆加固与钢架支撑对台藏塔的影响。结果显示:在卸荷等自然外力下北侧墙体将出现裂缝,与实际出现裂缝位置相符;注浆修复与土坯砌筑相比对北侧墙体侧向位移影响较小;修复完善后在风荷载作用下最大侧向位移明显减小;锚杆加固与钢支撑加固对土体侧向位移影响不大,其增强了台藏塔土体强度和稳定性。
Soil sites have high historical value, scientific value and archaeological value, but the physical and mechanical properties of soil determine the vulnerability of the earth site. Therefore, it is necessary to reinforce and repair existing earth sites. The three-dimensional finite element model was established by taking the tiding tower before and after reinforcement as an example, taking into account the key measures of the influence of adobe masonry, grouting wedges, anchor reinforcement and steel support on the Tibetan tower. The results show that there will be cracks in the northern wall under the natural external force such as unloading, which is consistent with the actual location of the cracks. The grouting repair has little effect on the lateral displacement of the north wall compared with the masonry. After the repair is completed, The maximum lateral displacement under wind load is obviously reduced. The effect of bolt reinforcement and steel support reinforcement on the lateral displacement of soil is not significant, which enhances the strength and stability of soil in Tainan Tibetan Plateau.