Abstract:There is a lot of sludge in pedosphere of Tianjin Area. Because of the geological characteristics of the sludge, it is dangerous to the quantity of piles within it. After analyses on and comparison between the defections of piles and geological data, the effect pattern of sludge on pile quantity was got out. Some suggestions about pile defect prevention in future project were put forward.

Abstract:The alternative of stopping water by curtain wall with two row of underground mixing piles and stopping soil by arch ring was adopted in Zhuhai Seaside Mansion. The points should be put attention on in design and construction of arch ring support structure was introduced. That the deformation of the arch ring support structure is smaller was validated by monitoring data.

Abstract:通过荆江长江干堤防渗工程实践，介绍了多头深层搅拌桩机的特点和技术参数以及多头深层搅拌桩施工技术方法和质量控制措施。

Abstract:The drilling principle, down-the-hole hammer drilling technique, core dynamite technology about accumulating capacity and cutting rock technology about tubular drill are introduced, taking bored pile construction of light track inclined bridge engineering in Changchun as a sample. Efficient methods of drilling hole and making pile for the large floating rock have been sum up.

Abstract:在内蒙古某电厂桩基工程施工中，采用旋挖钻机，配以底部镶嵌截齿的筒式钻头及双头螺旋钻头，顺利地完成了2000根桩的硬岩地层的施工任务。

Abstract:在呼和浩特市金山电厂桩基工程施工中采用旋挖钻机成孔工艺，存在钻孔缩径及坍塌情况，为此采取有针对性地配制并使用泥浆、埋设护筒、改进回转斗结构，钻进过程中控制钻速等措施。

Abstract:降水对逆作法施工尤为重要。逆作法施工中通常采用坑内深井井点降水，而在北京王府井大厦工程中充分利用了场地的水文地质条件，大胆地采用了自渗井点降水，取得了良好的降水效果，经济、社会效益显著。

Abstract:结合洛河大桥旧桥加固工程实例，详细介绍了锚喷混凝土技术加固旧桥的工作原理、施工工艺和经验教训。

Abstract:Several problems frequent encountered during underground pipeline thrusting in new distriction of east Zhenzhou, including water level lowing, pit supporting, cave-in during thrusting, deviation, surface settlement and so on, were introduced. The causes of the problems were analyzed. The concept of the problem settlement was put forward.

Abstract:On the basis of geological hazard investigation along a certain range of Ning-Zhang expressway (Hubei section), the author carries on an in-depth analysis on the hazard’s developing characteristics, distribution and original cause. The author assesses the geological hazard by analyzing its stability and danger degree. Some advice for countermeasures is also suggested in the paper. The paper provides a basis for controlling the geological hazard involved in the project.

Abstract:The traditional chain type walk device for steel trolley is easily to have fault and delay the project. The designed cylinder type walk device has been used in Sanjialing highway tunnel of Benxi City and has been proved to be satisfied fir steel trolley. The cylinder type walk device is possible and reliable.

Abstract:A-type hydraulic erection derrick for directional drilling was developed to fit the XY Series Core Drilling Rigs and National Paten was authorized. The structure pattern, characteristics and use cases of the derrick were introduced.

Abstract:Aimed at resolve the several problems which affect drilling efficiency, such as balling up and calcareous cementation , the design of blade bits was modified. And the results of the modification are satisfying.

Abstract:Being dead against the absorptive sticking of drilling pipes frequently encountering during drilling, the causes, conditions and technical treatments of the problems were discussed in details. The act mechanism of the newly developing sticking reliever XS-1 was analyzed. The operation rules and points for attention were put forward.

Abstract:Thermo-mechanical rock fragmentation drilling technology (TM ) is a kind of new drilling method, which firstly makes use of the friction energy produced by drill bit and rock to heat the rock, and then uses the cutting unit to complete the rock fragmentation. It improves the drilling efficiency and speed, because the physical properties such as intensity, hardness and wear resistance of most kinds of rock are weakened under high temperature and alternating heat stress conditions. The friction unit of TM bit is made of Sialon, of which the wear resistance is 2.8 times as much as that of YG alloy and the cost is only 1/10 times that of YG alloy. In the article, the author expatiates the structures and working principles of TM drill tool and bit in detail. Drilling experiment shows that the friction unit of TM bit can produce enough heat energy to high temperature(＞600 ℃), TM drilling technology is feasible, it can improve drilling efficiency and decrease the cost of drilling.

Abstract:Dasheen glue has good water-solubility. And its water soluble glue has high viscosity and its residue is less while glue broken and is contamination free. Due to the above mentioned features it widely used in hydrogeology drilling. Based on the past research of other people, the combined modification by chemical and physical method was used to improve the water-solubility and wall protection. The residue while glue broken became less.

Abstract:在广西贺州黄秆冲矿区第一个普查勘探钻孔施工中，由于在简单事故处理中措施不到位，造成了事故加事故的恶性事故。经过对事故的处理，为后续的施工积累了一些经验。详细介绍了事故情况及处理过程。

Abstract:介绍了一种简易的尾管固井法在地热井施工中的工作原理、使用方法、步骤及效果等。

Abstract:In this paper, the author have introduced the status quo of diamond bits and tools’ wide-adaptability, and discussed its research meaning, necessaries as well as the supporting work of needs in future.

Abstract:Basing on the abrasion principles of cutting teeth of the PDC bit a series of field experiments were made. The results show that the PDC composite layer thickness has great influence on the service life and drilling rate of a diamond bit. For a specified formation a optimism composite layer thickness may be found. And the composite layer thickness of the cutting teeth is a key factor for the optimism design of the diamond bit.

Abstract:Transmit peculiarity of dynamite shock wave was analyzed. That the tensile stress wave is mainly breakage force was pointed out. The effects of rock mass structure on rock blasting results were discussed.

Abstract:This paper expounded main engineering geologic problems met with in TBM excavation of Shanggongshan Tunnel, such as fault fractured zones, joint concentrated zones, big deformation of soft rock, karst and groundwater etc, and introduced corresponding countermeasures in detail.

Abstract:在雁门关隧道施工中，围绕钻爆快速掘进技术进行了探讨，从方案的实施、机械配套、掘进方法等方面进行分析，总结了复杂地层条件下隧道快速掘进的方法。