Abstract:A kind of water-sealing material used for well completion in high arsenic, high fluoride and high mineralization area was developed with good liquidity and high permeability resistance; no shrinkage, non-toxicity and in low-price. And the high permeability resistance and no shrinkage are very suitable to isolate the inferior aquifer in prevalence area.

Abstract:According to the construction experience and concrete requirements of the project,design and construction were implemented for national grade one shaft with multi-layer underground water demonstration monitoring well for the first time,and a new technology,PVC-U plastic tube 'open hole well completion by four times',was adopted.The paper detailed the design,concrete technical measures and the final achievement.

Abstract:This paper presents the method to increase well water flow rate of the tube well by recovering gravel layer through boreholes around well. It has been proved successful by the practice of a water supply tube well of a power plant.

Abstract:During well drilling in rock by conventional techniques, some involved problems are often met to stop drilling. The paper introduces the typical examples for resolving these problems by air-lift reverse circulation drilling technology.

Abstract:Drilling in complicated stratum is always the most difficult technical problem in the mineral resources exploration as well as the project reconnaissance and construction. This article analyzes the method of hole wail protection and leaking stoppage for drilling in complicated stratum; and with the case of drilling project of glauber salt mine in the foot of Liupanshan Mountain in Ningxia, proposes to use cement-sodium silicate-cloth sack in great crack in Karst Stratum. The nature of the dropout channel and the analysis method of leaking position, the principle of hole wail protection and leaking stoppage, and the correct method to determine grouting pressure and maximum grouting amount are elaborated. This method has been proved extremely effective with good economic efficiency.

Abstract:阜新东梁区是著名的易斜区，为防止在勘探孔施工中的孔斜问题，设计制造了导杆式防斜钻具。介绍了导杆式防斜钻具的组成、防斜机理及防斜应用效果。

Abstract:阐述了宁夏煤田矿区复杂岩层和松散煤层钻探所遇到的问题，采取的施工方法和钻进措施；分析了各种复杂地层和松散煤层钻头的选型和冲洗液的使用要点。

Abstract:The paper expounds the control on ground water table both in and out of foundation pit for foundation pit dewatering, and discusses the utilization of drained ground water in dewatering engineering.

Abstract:Soil nailing wall bracing is widely used in the bracing of foundation pit in recent years, instability of foundation pit often occurs because of some problems in design and construction. The thesis analyses the causes of the instability of foundation pit from reconnaissance, design and construction through a project example and simply introduces the relevant measures. Several remarkable experiences were put forward.

Abstract:介绍了SMW工法的机理及优点，以及该工法在天津近海地区海相沉积淤泥质土地层基坑支护体系中的应用实例，观测结果表明，该工法在天津近海地区软土地基中应用非常成功。

Abstract:天津某小区沉管灌注工程桩经检测发现部分桩存在缺陷和承载力不足问题，采用高压旋喷注浆技术对缺陷桩进行修补，对承载力不足桩进行补强，处理后经检测合格达到设计要求。介绍了处理方案及施工技术措施。

Abstract:在全面分析了青岛东海饭店露天游泳池的工程地质、环境条件和试验成果后，对该工程的防渗帷幕施工方案进行了合理的设计，在施工过程中进行了合理的优化和尝试，并取得了良好的防渗效果，达到了预期的目的。

Abstract:In the reinforcement for a bridge pier foundation, rotary drilling method and its construction order were taken according to the technical specification of mechanical vibration and the amount of open hole. And according to the engineering geology conditions, the key technology, wall-building by pressure grouting with two phase liquid, hole completion by drilling with cone-base roller bit and high quality, high viscosity slurry, were adopted to get good result.

Abstract:胶莱河大桥为荣（城）乌（海）高速公路二合同段重点工程，桥墩有88根Ф500咖灌注桩，是施工的重点和难点，介绍了桩基施工过程中各关键点的控制措施。

Abstract:对在射水法造砼防渗墙过程中遇极易垮塌的砾（卵）石层时，采用低标号水下砼进行固壁成槽施工的相关工艺进行了介绍；并通过开发出钻渣骨料分离器，实现了对成槽过程中所产生骨料的综合利用。

Abstract:结构防腐主要从混凝土内部阐述其腐蚀性，并通过掺入外加剂进行有机补偿，使其应用于各种抗裂防渗混凝土，尤其适用于与防水有关的地下、水工、海工、地铁、隧道和水电等钢筋混凝土结构工程。

Abstract:The paper introduces the main structural features and parameters of on-land charging device for blasting toeshooting offshore and on-land charging method.

Abstract:针对在实际应用中非开挖钻机液压系统出现气蚀现象而造成液压系统失效的问题，分析了气蚀产生的原因，提出了预防措施。

Abstract:In the drilling for oil shale resources, Shell Oil Corp. developed even and odd teeth polycrystalline bit, in order to avoid circulation suffocation, balled bit, bit-burnt, low footage, and designed rational water circuit. Comparing with PDC bit, drilling efficiency was multiple increased.

Abstract:The paper introduces the blasting demolish technology used for a cement plant. The blasting is difficult because of the complicated environment and large blasting scale, especially small height-to-width ratio of double row cement kiln. Rational blasting parameters, full pre-demolish, rational blasting circuit were adopted in the engineering and a series of integrated control measures for damage from blasting were taken to ensure blasting safety and environmental protection.

Abstract:With the under-construction case of the section between Shuangjing and Jingsong of No. 10 Line of Beijing Metro, analysis was made on the construction technology for single tunnel-single line-step excavation method. According to the analysis, the degree of influence to surrounding rock stability by technology of undercutting with shallow overburden, inclucling pre-strengthening, excavation sequence and step length, can be very clear.