Abstract:春节前夕，本刊记者(以下简称“记”)拜访了我国探矿工程专业的奠基人之一、中国工程院院士刘广志先生(以下简称“刘”)，现将有关谈话内容整理后刊出，以飨读者。

Abstract:The geological conditions are complicated and groundwater is rich under Qingzhou Dianzi Iron Mine which is planned to be developed. That seriously affects the mining of iron ore. The border of water block curtain, water block depth, water block materials were determined after scientific analyses on hydrology and geology condition and some geophysical survey. The drilling techniques and grouting procedures were optimized. The problems occurred during construction were researched and resolved. The task of water block within mine area was successfully completed.

Abstract:The geological conditions under Yichun City Audit Bureau Compartment Building are very complicated. Determination of proper load bearing layer of formation is key to foundation design. After evaluation and analyses on the formation conditions and existing local experiences as well as new pile foundation technology, the load bearing layer of piles were courageously put on the detritus soil layer which is unconsolidated, character various greatly and bearing capacity low. Bottom enlargement of bored piles was adopted to enhance the bearing capacity. Post grouting was used to reinforce the bottom of piles. The practice verified that the alternative was technically feasible and economical.

Abstract:The practice experience and construction result of directly put leoss near by the engineering site into borehole to make mud when making bored piles in sand formations were introduced.

Abstract:The problems existing in mud used in diaphragm wall construction were analyzed. The mud preparation and application experiences were introduced. The mud cost saving measures and mud quality enhances were brought forward.

Abstract:Application of combination of slop shield piles, soil block wall, pre-stressed anchor, pressure grouting, especially the combination of soil block wall and pile anchor, changed the conventional design consideration of controlling deformation by rigidity pivot. Using elasticity pivot method to design the slop shield piles and anchor within the limitation of deformation permission has greatly deduced the cost of project, and ensured the security, reliability and economy of pit support system. The design, main technical measures, and several conclusions of the project method mentioned above were also introduced.

Abstract:Taking the project of conducting water from Yellow River to Hohhot City, application of groundwater drawing-down technology with vacuum pump in geological conditions of multi-water-bearing material and engineering techniques were introduced.

Abstract:介绍了如何在事前监控及施工过程中加强对钻孔灌注桩的质量控制以及钻孔灌注桩事故处理的常用方法和一般原则。

Abstract:分析了水上大口径钻进成孔中护筒底部穿孔的原因及预防措施,并结合工程实例介绍了具体的处理方法。

Abstract:阐述了振冲碎石桩用于坝体砂层抗液化处理原理，对设计、施工工艺及效果进行了探讨。

Abstract:介绍了利用空压机清理孔底沉渣方法在郑州国际会展中心钻孔灌注桩施工中的应用情况，并分析了这种清孔方法与正循环清孔、泵吸反循环清孔相比具有的优势。

Abstract:The article expatiates on the history and development, the actuality of applications, the consideration of the strategies to the trechless technology, which has been applied in the city construction in Shanghai. Author′s contentions have been demonstrated by an abundant of accurate and authoritative information. It summarizes and introduces the application and development of the trechless technologies which have been used in nationwide of China.

Abstract:The idea that the margin slop stability problems caused by excavation should be put attentions when make construction near by the slops and dyke was put forward based on project practice of slop improvement in excavation of Longze Garden in Xiangshan County. That the pre-stressed anchor cable with frame beam is an efficient method to improve the slops when the slops are steep and the places are limited was also brought forward.

Abstract:Rotary drilling technology is a kind of high efficient drilling method which has been widely used in the foundation engineering of highway, railway and large hydropower station. It has a very signification for social and economy. The discussion was made on the technology used in gravel, boulder and hard rock formation.

Abstract:When small powered rotary rigs drill in mudstone，shale and big particle gravel with a diameter of 1,500mm for bored piles, the conventional inserted rock screw bits often present themselves slow penetration or even no penetration due to the rig's small power and small WOB. Through analyses on these problems occurred during bored pile construction for new plant building of Wanxi Pharmacy Limited Company in Xixia County, Henan, pertinent improvement measures were put forward and the good results were got.

Abstract:In recent years the impact that environmental change put on human living space becomes more and more significant. And the most valuable evidence recording the environmental change is the sediments under the lakes and reservoirs etc. The key technology of getting these sediments is freezing sampling technique. It is very important to analyze environmental change states, environmental pollution mechanism and to seek effectively measures for environmental protection. The principium and technology and caution of operation are mainly introduced in the paper.

Abstract:Suggestions on improving jam due to calcium and solid particle settlement caused by physical and chemical reaction during drilling, dissolving and saturating process of Uranium mine, in allusion to particular conditions of Uranium mining with dissolving and saturating in Xinjiang.

Abstract:The causes of water well casing damage in Liaohe oilfield were analyzed. The several advanced checking methods of casing damage were introduced. Several kinds of repair techniques were put forward. It is very significant to adjust measures to local conditions for casing repair and to renew production of casing damaged water well.

Abstract:针对山东省昌邑市南任铁矿矿区的具体地质条件，采取了水泥浆封固孔壁、硬质合金钻头下套管、膨润土固相冲洗液金刚石钻进等技术措施，收到了良好的钻探效果。

Abstract:This paper expounded the development and application in tunnel construction all over the world of TBM in the past half a century, pointed out that excavating tunnel by TBM has become the developmental direction of tunnel construction in the future. On the base of analysis of a great deal engineering example, combining the experience and lessons obtained in TBM construction, the authors discussed correlated engineering geological problems existing in excavation, such as fault fractured zones, compressional stratum, groundwater and karst etc.. At the same time, the corresponding countermeasures particularly for reference were introduced.

Abstract:Authors Base on elastic-plastic wall rock of theory, apply ANSYS FEM software, and adopt Drucker-Prager rules. FEM numerical simulation is used to analyze different shapes′hole, by means of the analysis of radial displacement and stress, even more distinctly realize the status of wall rock of hole ,to help the architect to confirm hole's shape, and avoid to the bad stability of shape; at the same time to be able to instruct the design of supporting structure.

Abstract:The performances and application of high efficient ventilation system DT-1 were expounded on details. The difficulty of ventilation in the one open end tunnel was resolved.