共查询到20条相似文献,搜索用时 171 毫秒
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土钉墙支护技术的应用及体会 总被引:1,自引:1,他引:0
结合具体的工程实例,就锚杆成孔、土层渗水、局部土质较差边坡喷锚等问题,提出了相应的处理措施,指出土钉墙作为一种比较新的边坡支护技术,很有发展前景。 相似文献
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介绍了路堑路基施工中,采用φ100m多孔PVC管盲沟解决路基及边坡渗水的处理方法,指出该方法对于渗水路堑路基的施工既经济又容易,是一种渗水路基处理的有效措施。 相似文献
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分析了某小区边坡渗水的原因,结合实际情况,介绍了边坡渗水的治理措施,并对渗水进行了收集综合利用,消除了边坡滑坡的安全隐患,取得了较好的社会效益和经济效益。 相似文献
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河南平顶山市中兴路活动中心工程由于施工违规造成边坡出现裂缝、渗水、失稳,发现情况后采取坑外卸载、跟踪注浆法、排水、喷混凝土面层、增设锚杆等处理措施,使基坑处于稳定状态。 相似文献
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对锚索钻孔常见的几种情况:回填土层(不稳定)、孔隙多渗水、易塌孔、卡钻进行了分析,提出了处理这几个难点的方法,结合有代表性的城市边坡防护工程锚索钻孔,采用套管护壁、预压水泥浆等方法解决了此类问题。 相似文献
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为了降低山地填土边坡内的渗水危害 ,本文在《山地填土边坡内渗水危害的量化分析》一文的基础上 ,提出和分析了设置卵砾石渗水层和导流盲沟两条设计途径。 相似文献
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介绍了两种处理城市供水工程渗漏水问题的工程实例,阐述了供水工程渗漏处理的重要性,也讨论了防范于未然和后天补救的辨证关系。 相似文献
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北京市供水管网的老化漏失规律模型研究 总被引:2,自引:2,他引:2
供水管网漏失的监测难度大,维护费用高.为了有效减少管网漏失率,需要研发管网漏失模型,从而制定合理的监测模式和维护方案.针对管网老化过程,分析了其与管网漏失率的关系,应用决策树方法开发了包含管龄和管径两个因素在内的漏失规律模型.以北京市为例,对主城区19年间(1987年-2005年)由供水管网老化造成的漏失数据进行分析.结果表明,老化漏失管道的管龄服从Weibull分布,管龄为20年左右的管道更易产生漏失.利用建立的漏失规律模型,通过ArcGIS预测了2008年北京市区供水管网的老化漏失分布情况,其结果将用于漏失监测仪的优化布置. 相似文献
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运用层次分析法对给水管网漏损影响因素进行分析,得出给水管网漏损各影响因素的相对重要性权重,为供水行业漏损深入研究提供了一种新思路、新方法。 相似文献
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《Urban Water Journal》2013,10(1):25-45
Leakage in water distribution systems is an important issue which is affecting water companies and their customers worldwide. It is therefore no surprise that it has attracted a lot of attention by both practitioners and researchers over the past years. Most of the leakage management related methods developed so far can be broadly classified as follows: (1) leakage assessment methods which are focusing on quantifying the amount of water lost; (2) leakage detection methods which are primarily concerned with the detection of leakage hotspots and (3) leakage control models which are focused on the effective control of current and future leakage levels. This paper provides a comprehensive review of the above methods with the objective to identify the current state-of-the-art in the field and to then make recommendations for future work. The review ends with the main conclusion that despite all the advancements made in the past, there is still a lot of scope and need for further work, especially in area of real-time models for pipe networks which should enable fusion of leakage detection, assessment and control methods. 相似文献
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通过对现场环境、渗漏水原因的分析,结合相关规范,提出了渗漏水治理方案,重点就材料选用及施工工序作了论述,以确保变形缝较大时不再出现渗漏,保证地道的正常使用。 相似文献
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Zhang Xuefu Zhang Yaonan 《Tunnelling and Underground Space Technology incorporating Trenchless Technology Research》2006,21(6):656-667
The status of water leakage of Kunlun mountain tunnel on Qinghai–Tibet railway is introduced by the time step in this paper. Based on the status of water leakage, the reason of water leakage of the tunnel is analyzed. In the light of the principle of protecting the frozen soil layer from thawing, a new-styled measure for treating water leakage, filling the ripped stone layer, is presented, and the design of filling the ripped stone layer is made. According to the basic theories of heat transfer and seepage, considering the coupled effects of seepage field and temperature field, a three-dimensional calculational model of the coupled problem is given, the spatial domain finite element formulae of this problem are obtained by Galerkin method, the time domain finite element formulae are obtained by Crank–Nicholson method, the solution process is presented, and a computer program is written. Using this model and program, three-dimensional nonlinear analyses for the coupled problem of seepage field and temperature field of the flat buried part from DK977+578 to DK977+682 in Kunlun mountain tunnel on Qinghai–Tibet railway are made under the two conditions of filling the ripped stone layer and not filling the ripped stone layer. The results show that it is feasible that the ripped stone layer is used for preventing water leakage of the permafrost tunnels. So, a new-styled measure can be used for treating water leakage of the permafrost tunnels. 相似文献