Abstract:The author generalized the working mechanism of granular material cushion of CFG pile composite foundation under rigid foundation. The difference between the former and embankment loads is analyzed with finite element modeling method. Some suggestions on cushion setting are offered.

Abstract:This paper describes the design idea and its actual application effect on a support system for a deep foundation pit which is located in a very complex area where there are various kinds of pipe lines under the ground and many buildings on the ground.

Abstract:Application of water drawing down technology with casing well in complicated geological environment which has multi-water-bearing media was introduced, taking the project of Meeting & Exhibition Center on Bengbu City Center Square as an example.

Abstract:Based on the in-situ investigation results for the storey-addition of Siping-Building, the engineering geological problems relate liquefaction of sandy soils and the settlements of an existed building caused by the storey-addition activities have been discussed. Results show that the long-time load of buildings is very useful for the increasing of both the strength of sub-soils and the anti-seism ability of sandy sub-soils.

Abstract:The rock and soil conditions of and circumstances around the foundation pits of Changsha Moern Mansion were analyzed. Further several foundation pit supporting plans were analyzed and approached. Finally the adopted combined soil nail wall supporting plan was calculated and designed.

Abstract:Due to the change of design of Wenhua Mansion, bored piles need constructed on the storey which has been constructed. Through the mechanics analysis of the mayor component-beam AB and the reinforcement of the beam, the construction problems of bored pile on storey were solved.

Abstract:采用旋挖钻机在细颗粒地层中进行钻孔灌注桩施工,容易发生埋钻事故。通过哈磴高速公路一个桩孔埋钻事故的处理实例及对该事故的分析，提出了预防旋挖钻进埋钻事故的措施。

Abstract:介绍了采用单管高压旋喷技术对天津市东南半环海河特大桥桥墩钻孔灌注桩缺陷部位处理的具体方案、补救处理措施、施工工艺及检测结果等。

Abstract:通过对非嵌岩钻孔桩工艺特点、施工条件等的分析，探讨科学、合理的孔底沉渣测定的基准面。

Abstract:在宿淮高速公路五河口特大桥桩基工程施工中，克服了硬塑性粘土层的糊钻、进尺困难的情况。通过在钻进工艺上的摸索，找出利于实际施工的工艺方法。

Abstract:Application Research on Pneumatic Ramming Pipe Method

Abstract:以尾矿坝排渗井管顶管为前提，根据工程特点引入导向钻进技术铺设导水管。顺利完成井下对接，且使RD385L型导向系统性能得到充分发挥，测深达9.5~10.0 m。为导向钻进技术拓展了新的应用领域。

Abstract:To solve the problems of non-vibration-resistance and low recovery of rock samples existing in orientation instrument which takes radial as reference, KD Orientation Instrument was developed out based on the relationship between time and space position of borehole. The basic structure, technical data and application in situ of the instrument were introduced in details.

Abstract:Rig “Salt Lake Explore 1” was developed on the basis of the features of salt lake in Tibet. The peculiarities of the equipment and its application in First Scientific Investigation in Qiangbei depopulated zone of Tibet and in 2002 were introduced. The equipment was further modified being directed against the existing problems in application so that made it better suit the survey under the adverse conditions of waters, tidal-flat area, marsh, hard land, anoxia plateau and so on. It displayed superior performances in salt lake survey in Tibet in 2003 after its modification.

Abstract:通过对秦岭3号隧道地面垂直注浆孔钻进成孔的情况比较，阐述了MK系列钻机与某立轴钻机相比在复杂地层成孔中的优势，为复杂地层中的成孔寻找出一种新的设备，拓展了MK系列钻机的应用范围。

Abstract:分析了目前水平钻机扩孔钻进存在的一些缺点，介绍了所设计的行星减速式扩孔器的结构特点及其优势。

Abstract:The formula calculating diamond bit temperature is given. Researching hole conditions with acoustic measurement is done. The thermal physical process of diamond bit is studied in laboratory. And practical questions in drilling engineering are answered.

Abstract:Erosion and encrustation universally exists in steel casing which is used in medium depth geothermal well. Primary study was conducted on erosion and encrustation of steel casing used in Henan geothermal wells. Indoor tests were made with different materials and under different water temperatures. The measurement was made by down well colored TV. Suggestion on reduction of erosion and encrustation of steel casings was put forwards.

Abstract:The drilling fluid design was completed by CBR and RBR according to the requirement of drilling fluid design. Using the two methods at the same time come overcome their respective defects, and complete the drilling fluid optimization design.

Abstract:20世纪70年代初期以来，北京地区地热资源勘探开发日益发展，应用了泥浆正循环、气举反循环、高压喷射、泡沫增压等钻探工艺，地热井钻探工艺不断完善和多样化。论述了北京地区地热井钻探工艺的发展情况，并提出了北京地区地热井钻探工艺方法选择的建议。

Abstract:介绍了深井管破损后的堵漏方法及在堵漏过程中的注意事项。

Abstract:The performances of superfine Fe-Co-Cu pre-alloyed powder SFP were tested, measured and analyzed. The sintered temperature of the powder decreased to 700 ℃, high relative density of fusion was proved to be 97%, in addition high hardness and abrasion resistance was achieved. The examination showed that the powder had less differ in size and better oxidation resistance than ultra-fine cobalt powder. Blending with other powder, different hardness and erosion resistance property could be achieved. In conclusion the pre-alloyed powder can match with the foreign products.