Abstract:Based on the analysis on demand for drilling technique of geological work in China and present situation of geological drilling technology, long-term, medium-term and short-term developing blueprints were put forward. Key points and plans of recent development and research were defined. Innovation of science and technology was stressed, as well as the importance of popularizing and applying new technology and new method and giving full scope to Exploration Engineering Professional Committee.

Abstract:Soil arching effect is the basis for retaining piles.In this paper,FEM is first used in the study of stress and deformation for a real soil arch,and then based on it,stress and deformation condition behind retaining piles for deep pit is analyzed.The soil behind retaining piles can be divided into 3 region:(1) the region under soil arch,(2) soil arching region,(3) uniform stress zone in crown arch.In region(1),the maximum principal stress is tensile stress;the stress state in region(2) is the same with that of the real soil arch.The boundary of these 3 regions is studied.The influence on the structure of soil arching region by loading and clear space of retaining piles is also discussed.

Abstract:The monitoring data of one subway foundation pit engineering in shanghai was analyzed in detail and the possible reasons of the potential accident were primarily discussed. The result shows that the building overloading has prominent influences on the deformation of the foundation pit, and that the deformation of the building and foundation pit has the characters of simultaneity and suddenness, which can give some reference for the similar engineering works.

Abstract:This paper illuminates the design of anchor bolt and the whole stability in deep foundation pit shoring through the field cases; meanwhile, it analyses the influential factors on the bearing capacity of anchor bolt.

Abstract:Considering the engineering geology,hydrogeology and environmental conditions in the site of Sciences & Education Building deep foundation pit project of Wuhan No.2 Hospital,the single-pipe high-pressure jet grouting method was adopted to prevent underwater from flowing into foundation pit.The process was depicted in details.The practice proves that this method successfully stopped the flow of upper stagnant water.During excavation,no seepage occurs,which facilitated the subsequent construction.And it also proves that single-pipe high-pressure jet grouting method is very suitable for water-prevention and reinforcement of foundation pit in urban areas because of its convenience of construction,low cost and no need for excavation.

Abstract:The in-water main piers of Sanmenjiang Bridge are elevated pile caps that were constructed by steel hoisting box cofferdams. Simple steel reinforced pile with tensile and compressive strength was taken as hanging parts of hoisting box. It is easy to operate and can lower the construction cost, so this technology deserves to be popularized.

Abstract:Heavy pile group foundation was taken as the main pylon for Changjiang highway bridge of Suzhou - Nantong, hole boring technique was tested through simulating borehole pile in water before construction by overtopping current specifications. The result of construction technology of testing borehole was introduced in this paper.

Abstract:武汉天兴洲公铁两用长江大桥桥基桩孔口径大，深度深，嵌岩深度大，岩层胶结性差，孔壁不稳定，易孔斜，针对这些钻探难点，在钻孔工艺、钻进参数、钻头选择改进、泥浆应用方面采取了相应的技术措施，取得了良好效果。详细介绍了该大口径嵌岩桩钻孔施工技术。

Abstract:Borebole east-in-place pile technology is widely used in the treatment of soft soil and rock foundations. This article is intended to illustrate the construction technology applied in the 120m extra-deep large-diameter borebole east-in-place pile of Wenzbou World Trade Center Mansion, and to present relative measures taken for the problems easily encountered during the construction, such as skewing boring, sticking, breakdown, blocking, etc.

Abstract:通过介绍三重管高压旋喷灌浆工艺在金盘水库坝基防渗工程中的应用，从工程质量和孔内安全角度，强调了在大深度高喷工程中应用三重管旋喷灌浆工艺对施工设备及灌浆管具选型的重要性，并从钻孔和灌浆两方面分析总结了不同于常规高喷灌浆施工的质量控制措施，探讨了三重管旋喷灌浆工艺在大深度高喷工程中实际应用的可行性。

Abstract:The important function is detailed on drilling technology for hydrological well applied in exploitation and utilization of underground water resources, especially in deep layer. In view of the characteristics and level of drilling technology for hydrological well, and present situation of development and application of hydrological well drilling rig in China, some opinions and proposals on application of hydrological well drilling technology and equipment are put forward with field cases analyzed.

Abstract:介绍了国内外岩心钻机的发展现状，并结合目前我国的实际应用状况，分别就机械传动钻机、液压传动钻机与当今主流钻探工艺的适应性进行了分析比较，认为全液压岩心钻机是发展方向。但是，两种传动型式的钻机会在较长时期内共存，全液压岩心钻机的系列研发与机械传动岩心钻机的改型、改进应处于并重的地位。并指出在产品研发和产业化制造过程中需关注的问题。

Abstract:Based on the experiment research,it was compared that the inorganic polymer silicate with organic polymer such as polyvinyl alcohol(PVA),partially hydrolyzed polyacrylamide(PHPA),polyacrylamide(PAM) and kalium polyacrylate on the capability of instability prevention.The conclusion was drawn as following from the experiment.Firstly,the velocity of the film forming by adsorption and density of the protective foil were the key factors to determine the IPC(instability prevention capability) of the drilling fluid systems;secondly,the IPC of the drilling fluid systems was the result of synergistic action of the inorganic and organic polymers;thirdly,the IPC of PHPA drilling fluid system was better than PAM drilling fluid;finally,the addition of Na-CMC and PHPA could increase the density of the adsorbed film and improve the IPC of the system.

Abstract:Gas drilling has been used extensively because of its high penetration rate and some other advantages, it becomes another hot developing technology after horizontal well drilling. The paper introduces the establishment of calculating model for gas drilling and the programming of the applied software, and analyzes the model for gas drilling theory with field eases.

Abstract:Combination of flexible deviation correction and prevention drilling tools can control the increase of deviation of the drilling well effectively while the rate of penetration(ROP) is increased,and can decrease the deviation also.It provides us a new type of the combination of drilling tools for the big inclination angle and hard stratum area,in which deviation is very easy to be encountered during drilling.In this paper,we introduce the mechanism of deviation correction and prevention of the combination of these flexible drilling tools;meanwhile,analyze the mechanical model of this type of drilling tools,then put forward the deviation correction and prevention drilling technical measure.

Abstract:The application instance of wireline coring technique was introduced with the project case of coal-bed methane parameter well in Baotian - Qingshan area of Guizhou, the drilling techniques were brought forward in accordance with complex formation, unstable borehole wall, being hard to core in coal powder.

Abstract:Technique of well logging by directional scanning image means scanning the wall of a well according to the given direction,and makes the wall of a well be unfolded to a continuous plane.Common ultrasonic imaging well logging instruments make the strongest magnetic north signal of terrestrial magnetic field as the starting point of scanning trigger signal,which can neither work in the condition of magnetic shielding or magnetic interference,nor ascertain the location of geologic information.However,by taking gyro-positioning technique to locate artificial magnetic field,the ultrasound image produced by measurement processing,where AC(Alternating Current) signal is induced by rotated coils in the artificial magnetic field as the triggering signal for image scanning,we can quickly and accurately ascertain the fault spot and the damage scale and location of well pipes,so as to provide the reliable basis for making maintenance plan.

Abstract:介绍了复杂环境下城市环形立交桥拆除爆破方案及爆破高度、爆破参数、爆破网络的选择和计算，以及爆破采取的防飞石、防振措施。

Abstract:一、《国务院关于加强地质工作的决定》发布 2006年1月20日，《国务院关于加强地质工作的决定》发布。《决定》阐述了加强地质工作的重要意义、总体要求和基本原则，明确了地质工作的6项主要任务：突出能源矿产勘查，加强非能源重要矿产勘查，做好矿山地质工作，提高基础地质调查程度，强化地质灾害和地质环境调查监测，推进地质资料开发利用。其中前5项主要任务都需要探矿工程（地质工程）直接参与。要求：“积极开展……勘查开发关键技术的自主创新”；“加快对地观测、深部探测和分析测试等高新技术的开发与应用。

Abstract:由中国水力发电工程学会地质及勘探专业委员会、中国水利学会勘测专业委员会、中国水利水电钻探信息网联合主办，并由四川准达岩土工程有限责任公司承办的“第十二届全国水利水电钻探与岩土工程施工学术交流会”于2006年12月8-10日在海南省三亚市举行。