地质雷达在水利工程质量检测中的应用

目前,江西省水利工程质量检测多采用取芯法或回弹法检测混凝土实体质量,传统的检测方法难以检测混凝土内部缺陷,同时,存在时效性和适用性不强的缺点.本文结合混凝土挡墙工程的实际检测环境,采用地质雷达无损检测方法,以提高检测效率,客观高效地实现对水工混凝土质量的控制.该方法基于波的反射定律,通过对地质雷达接收波进行信号分析,判断目标物的位置、形状、缺陷等,用以分析混凝土的施工质量.将地质雷达检测方法应用于浯溪口水利枢纽混凝土挡墙工程质量检测中,对比分析地质雷达检测法与钻芯法检测结果,表明:地质雷达法能够很好的应用于混凝土挡墙工程质量检测,与传统检测方法相比具有无损、快速和高效的特点,在水利工程混凝土质量检测方面具有很好的应用前景.     

浅析大同市区地下水开采与环境地质问题

大同市平原区地下水历年严重超采 ,造成了地下水持续大面积大幅度下降 ,从而形成了总面积 93 .6km2 的 4个地下水降落漏斗 ,最大漏斗区中心水位下降达 30m ,随之引发了大面积地面沉降 ,地裂缝出现并不断发展 ,总长度达 18.8km。另外 ,由于废污水的排放、引污灌溉、工业生活废渣的堆积 ,造成地下水质污染 ,使得水环境地质状况进一步恶化     

探地雷达在莲花电站二坝坝顶路面裂缝探测中的应用

介绍探地雷达探测方法,探讨使用高频探地雷达探测粘土心墙堆石坝坝顶混凝土路面裂缝,达到快速、无损查明坝顶混凝土裂缝的性质与成因的目的.     

运城市城区地下咸水资源开发利用前景及措施探讨

运城市城区地下深层承压水严重超采，地下浅层咸水一直未被人们充分认识和利用。本文在分析区内水资源开发利用现状及程度的基础上，对地下浅层咸水资源开发利用前景及措施进行探讨，以浅（咸）代深（淡），涵养深层水源，达到水资源可持续利用。     

太原西山地质灾害机理分析及防治研究

地质灾害严重影响了当地的工农业生产和经济建设，影响居民的正常生活，通过野外调查和实际资料分析，详细阐述了太原西山地质灾害的类型和特点，探讨了其形成机理，并提出了相应的防治措施。     

缅甸敏达水电站厂房设计

结合缅甸敏达水电站地形地质条件,从厂址比选、开关站型式比选和厂房布置等几个方面介绍了该水电站厂房设计的基本思路及设计要点。     

The geothermal characteristics of the ground and the potential of using ground coupled heat pumps in Cyprus

The ground can be used as an energy source, an energy sink, or for energy storage and for this reason ground characteristics should be available. Therefore the purpose of this paper is to present the recorded ground temperatures at eight representative sites of Cyprus, in relation to depth, time of year, geology and altitude and discuss the efficiency of Ground Coupled Heat Pumps. The ground temperature was recorded for a period of one year, from October 2009 to October 2010. According to the results obtained, in several locations in Cyprus the surface zone reaches a depth of 0.5 m. The shallow zone penetrates to 7-8 m and there after the deep zone follows in which the temperature remains constant throughout the year with a range between 18 and 23 °C. For the eight boreholes, additional geothermal data were also recorded like the type of ground and thermal conductivities of the various geologic layers. The data collected clearly indicate that there is a potential for the efficient use of Ground Coupled Heat Pumps (GCHPs) in Cyprus leading to significant savings in heating and cooling energy consumption.     

向家坝水电站不同埋设方式蜗壳结构有限元分析

针对向家坝地面电站,采用三维有限元法分析比较蜗壳不同埋设方式下的流道及其外围混凝土结构的静力特性,为蜗壳埋设方式的选择提供依据。研究表明:直埋方案所需配筋最多,不经济,且可能产生贯穿性裂缝;垫层方案应力普遍较小,垫层沿水流向敷设至蜗壳45°断面的组合方案仅局部区域有较大拉应力。推荐采用垫层埋设方式或垫层敷设至蜗壳45°断面的组合埋设方式,但同时应采取有效工程措施避免局部产生贯穿性裂缝。     

Effects of multiple ground layers on thermal response test analysis and ground-source heat pump simulation

A modified three-dimensional finite difference model for the borehole ground heat exchangers of a ground-source heat pump (GSHP) system was developed which accounted for multiple ground layers with different thermal properties in the borefield at no groundwater flow. The present model was used to investigate the impact of ignoring ground layers in the thermal response test (TRT) analysis and the subsequent system simulation. It was found that the adoption of an effective ground thermal conductivity and an effective ground volumetric heat capacity for a multi-layer ground determined from a TRT analysis led to very little error in the simulated long term system performance under various ground compositions investigated. The maximum difference occurred for a 3 × 3 borefield in a dual-layer ground which measured 0.5 °C or 3.9% in the rise of the borefield fluid leaving temperature with a cooling-dominated loading profile for 10 years. With the same borefield and ground composition, a dynamic simulation of the complete GSHP system was performed using the TRNSYS simulation software. It was found that the overall system performance based on the present and the old models differed very little. It was concluded that the assumption of a homogeneous ground in a TRT analysis and subsequent system simulation was appropriate and impact of ignoring ground layers was small. A single-ground-layer model, including the analytical models, was sufficient even for a multi-layer ground. This could reduce the computation time significantly, especially when simulating a large borefield.     

高含硫气藏安全清洁高效开发技术新进展

我国的高含硫气藏大多赋存干海相碳酸盐岩储层中,具有埋藏深、地质条件复杂、高温高压、高含硫化氢和二氧化碳的特点,在气田开发工程建设和安全清洁生产保障上存在着诸多技术难题。我国高含硫天然气资源丰富,主要集中分布在在四川盆地,目前累计探明储量已超过1×10~(12)m~3,自20世纪60年代在四川盆地威远震旦系高含硫气藏进行开发实践以来,陆续成功开发了卧龙河、中坝等一批中小规模、中低含硫气藏,2009年以来龙岗、普光等一批高含硫气田的相继成功投产,标志着我国高含硫气藏开发技术取得了新的突破。为此,重点介绍了"十二五"以来针对我国高含硫气藏安全、清洁、高效开发的实际需要,在气藏工程、钻完井工程、采气工程、地面集输与腐蚀控制工程、天然气净化和安全环保工程技术领域所取得的新进展。最后,分析了目前我国高含硫气藏开发面临的挑战,指出了下一步技术发展的方向:降低安全风险,降低环境危害,提高高含硫气藏开发效益。