以某电缆隧道深基坑开挖为研究对象，基于Midas GTS NX软件建立了数值计算模型，结合实测结果对所建模型进行了验证，进一步探究了深基坑开挖过程中的降水与变形特性。结果表明，基坑周围的水头以球状分布，基坑外部的水头高于基坑底部的水头，坑外水向坑内渗流，地连墙对地下水的水力联系具有很好的阻断作用；地连墙位移从上到下呈现出先增大后变小的规律，最大水平位移为8.54mm；支护结构的嵌固深度随开挖深度变小，地表沉降最大值逐渐向基坑方向靠近，基坑隆起在开挖22.8m时达到最大值6cm。
为解决矿山开采过程中引发的地质灾害及生态环境破坏问题，以某典型矿山区域为例，对矿山地质灾害的类型、成因及危害程度进行深入研究。通过现场调查、数据分析与模拟预测，提出针对性的地质灾害治理措施及生态环境修复方案。这些措施和方案旨在有效控制矿山地质灾害，恢复受损生态环境，促进矿山可持续发展。研究成果可为相关矿山地质灾害治理及生态环境修复工程提供理论依据和实践参考。
This thesis explores street renewal and emotional experience repair based on the concept of emotional design, aiming to build a street space with a sense of belonging, identity, and intimacy. An evaluation model from the emotional perspective was constructed by eight elements, and an AHP method and SD questionnaire were applied for investigation. The final results show that pedestrians rate the smoothness of the road surface the highest while rating the completeness of landscape features and public service facilities the lowest. This thesis provides reference value for street space quality and emotional experience and offers guidance and suggestions for urban planning and street renewal.
The corrosion damage of steel pipe is mainly characterized by crack initiation and local wrinkling. One of the effective methods to evaluate the damage degree of steel pipe is to find out the law of crack initiation. The research object of this test was Q235 steel pipe specimen with diameter of 700mm, wall thickness of 5mm and height of 260mm. Acoustic emission technology was used to conduct real-time axial compression detection on corroded steel pipe specimens. The relationship between acoustic parameters (cumulative ringing number and amplitude) and the damage degree of steel pipe specimens was established, and the crack propagation law and crack initiation load of steel pipe after corrosion damage were obtained. By analyzing the different characteristics of the relationship between the displacement of loading point and acoustic parameters, the general position of steel pipe damage was detected and the exact value P of crack initiation load was determined. The experimental results provide a basis for further research on the damage mechanism of steel tube specimens. The test results provide a certain basis for further research on the damage mechanism of steel pipe specimens.
随着我国城市化进程的不断加快,市政工程建设项目越来越多,其中地下管线施工技术是市政工程建设项目中的一个重点及难点之一,地下管线包括水管、暖气管、各种通讯线路等等,它覆盖区域广,牵涉面多,如果管线分布情况缺乏科学性,施工质量达不到标准,将会大大影响人们的日常生活,同时也会增加施工成本,因此,地下管线的施工技術就显得越来越重要了。
