基于突变理论的盾构下穿危旧房屋及河流段风险评价与控制方法研究

发布时间：2018-04-24 21:49

本文选题：安全管理工程 + 突变理论　；参考：《安全与环境学报》2017年04期

【摘要】：为了综合评价盾构下穿危旧房屋及河流段风险,结合软土土质特点,在对已有评价模型分析的基础上,针对风险评价普遍存在的问题,借鉴突变理论,确定盾构施工风险突变评价法步骤,将各因素归纳为工程地质、勘察设计施工、周边环境和水文地质四大指标,并对其进行分解,构建风险评价指标体系及等级标准,利用突变理论对工程实例进行评价,得到该区间盾构施工风险等级为极高风险,评估的结果较好地反映了工程的实际情况。基于风险评价结果,在盾构下穿过程,采取合理设定土压力、调节盾构推进速度和注浆压力等措施,实时动态监控地表沉降的变化和盾构施工关键参数,所得成果验证了突变理论风险评价的实用性和有效性。
[Abstract]:In order to comprehensively evaluate the risk of dangerous buildings and river sections under shield tunneling, combined with the characteristics of soft soil, and based on the analysis of existing evaluation models, the catastrophe theory is used for reference in view of the common problems in risk assessment. The method of sudden risk assessment for shield tunneling construction is determined. The factors are classified into four indexes: engineering geology, survey and design construction, surrounding environment and hydrogeology, and the risk evaluation index system and grade standard are constructed by decomposing them. The catastrophe theory is used to evaluate the engineering example, and it is obtained that the risk grade of shield tunneling in this section is extremely high, and the result of evaluation reflects the actual situation of the project well. Based on the results of risk assessment, in the process of shield tunneling, some measures, such as setting earth pressure reasonably, adjusting the speed of shield driving and grouting pressure, are adopted to dynamically monitor the change of ground subsidence and the key parameters of shield construction in real time. The results verify the practicability and effectiveness of catastrophe theory risk evaluation.
【作者单位】：西安建筑科技大学土木工程学院;广西建工集团第五建筑工程有限责任公司;
【基金】：国家自然科学基金项目(51408463) 陕西省自然科学基础研究项目(2016JQ5091)
【分类号】：U455.43

【相似文献】