Abstract:The engineering geological condition, pit support design and its construction process in Beijing Century Building Project are mainly introduced in this article. It is narrow around the deep and big pit. It is designed via calculation and contrast that the top wall with nail in soil plus the bottom slope-supporting pile is adopted on the narrow west pit near a road and existing buildings and that the top wall with nail in soil plus the bottom slope-supporting pile and anchor is used on the rest parts of the pit. This scheme has excellently solved the problem of the low security and has relatively reduced the cost of the support and protection of the pit. This article has some reference sense to the design and construction of the deep and big pit.

Abstract:Influence of overbreak on the safety of foundation pit support with soil nail wall was analyzed based on some foundation pit support project case.

Abstract:概述了广州伊顿十八高层商住区基坑工程多种支护结构形式的设计和出现问题后的处理措施，对支护结构的施工过程和施工技术措施作了较详细的介绍。

Abstract:根据福建漳州新城大厦基坑降水井口径大、单井涌水量大的特点，采用了350 mm钢筋笼外包一层20目不锈钢丝网和一层28目尼龙网，孔隙率比钢管作滤管高3倍以上，增大了过水面积，降低了水跃值；管壁与孔壁间采用粒径比规范值大一级且大小不等(1～4 cm)的砾卵石作为滤料充填，洗井时间比按规范值填砾缩短2/3，井内泥浆采用排污泵排除，并与空压机清洗联用，洗井速度快，效果好。

Abstract:通过多年的施工实践，结合钻孔压浆法成桩工艺的特点及在齐齐哈尔地区地层条件中的应用，阐明了该工艺的优越性及广阔的应用前景。

Abstract:介绍一种在嘉兴地区应用较为成熟的桩型——平底大头桩，它是一种采用预制扩大头的特殊型式的沉管灌注桩，能够充分利用浅部持力层的承载性能，提高单桩承载力，既能满足上部荷载及变形要求，又能达到节省造价的目的。

Abstract:介绍了化学灌浆和碎石桩置换相结合在软土地基加固处理中应用及锤击法碎石桩施工工艺。

Abstract:介绍了既有房屋基础加固及纠倾的设计和详细处理过程，并分析了出现基础不均匀沉降的主要原因。

Abstract:混凝土冬季暖棚法是一个古老工艺，存在生产方式落后，生产效率低下，环境污染严重，运行成本高昂的弱点。论述了在古老工艺思维的基础上，充分发挥现代自动燃油加温设备的优势，通过输送蒸汽、吹送热风，满足了混凝土拌合、浇筑和养护的温度要求，保证了生产质量，实现了混凝土冬季施工。

Abstract:在对某引桥挡土墙现场调查和分析有关资料的基础上，分析了挡土墙外倾的主要原因。根据其外倾原因和现场的具体情况，综合考虑多方面因素后，提出了具体可行的治理措施。

Abstract:通过超常规三重管旋喷法在青岛前湾港基础加固施工实践，阐述了这种方法的施工工艺及效果。实践证明，这种方法可解决常规旋喷方法难以奏效的问题。

Abstract:以湖南湘潭某通信管网建设工程为例，介绍了采用导向钻进非开挖技术进行铺管建设中导向轨迹的设计方法，以及根据工程情况确定所需的最大回拖力，并针对工程特点提出几项施工质量保证措施。

Abstract:This paper mainly introduces the reinforcement design and construction way of some high slope in Guangzhou. Various methods are used in the reinforcement program, such as anchor wire, rockbolt, anti-slide pile, steel-pipe pile, lattice girder and soil blocking wall, which have effectively raised the slope stability. The FEM method was adopted to verify the rationality of the design program. The situation results confirmed with engineering practice.

Abstract:The article introduced the work principle of the injector device and the application in the reverse-circulation sampling drilling bit. Then use the FLUNET fluid engineer emulator software to simulate the onerous formed inside the different obliquity and hole diameter respectively. The pressure distributing nephogram and the corresponding numerical value has been gotten. Injectors with different degrees and different hole diameters according the conclusion from FLUENT be designed to experiment in the laboratory. Comparing the two values we found that they are anastomose essentially. It shows that using emulator technology to design is credible and simple, and the cost is lowered, the design cycle is shorten compared with the method through experience and test.

Abstract:Aiming at screw steel bolt which is widely used in underground engineering and has some disadvantages such as low pre-tension and short pre-stressed area, the author designed mechanical anchoring device. It improved obviously the length of pre-stressed and pre-stressed, which can effectively solv the problem of cyclic loosing pallet by explosion or rock behavior. After our testing and locale application, the results indicated that it can well adapt for bad rock conditions.

Abstract:分析了目前大中型老矿山穿爆设备普遍采用的KQ、YQ系列潜孔钻机匹配座式空压机存在的问题，提出了改用钻机、空压机、动力三位一体的液压潜孔钻机的解决方案，并以江西宜春坦铌矿为例进行了两种设备的对比。

Abstract:Inner upsetting technology for thin wall drilling pipes was used in Series SQ high strength wire line drilling pipes. The strength of drilling pipes was increased 40% by optimizing joint thread parameters, improving heat treatment and surface treatment techniques and simplifying structure. The life of the drilling pipes was obviously increased. The pressure drop through the drilling pipes was decreased. A good result was gained in complicated geology conditions.

Abstract:By studying the application of sandwich-structured synthetic diamond core bits, following results are concluded: Matrix hardness can be HRC3-5 higher than that of similar ordinary ones; Finer diamond can be used partly as substitute of coarse ones, or even a fraction smaller size can be adopted, which can reduce the cost with better performance especially for drilling medium to hard formation (grade 8-10); Many factors should be considered when designing the width of interlayer, and usually it should be 1/5 to 1/4 that of the kerfs. The problem of short working life of core bit because of wearing out of the inner wear-resistant layer can be solved by adding 5% to 8% RVD2 of 70/80 mesh to strengthen the inner layer or the width of inner layer being 1/3 that of the kerfs. Such experience is beneficial to the manufacturing technology of Sandwich-structured Diamond Core Bits.

Abstract:The various measures, such as pre-casting through advanced installed pipe shed, grille steel frame or profiled bar support, top arch net, system rockbolt, and injecting concrete, were used to deal with the technical difficulties under bad geological conditions during excavation of tunnel within V type surrounding rocks. The tunnel section of 574 m length was safely excavated through V type surrounding rocks, including 3 broken belts. The fore shaft was successfully made.

Abstract:Inverse design and construction used in civil air defence under Xinhua Street in Nanning was introduced. During construction, bored row piles for supporting and center piles for load bearing was firstly made, and top tray was used as support system. After road surface recovered, the foundation pit was excavated to its bottom and the main structures were constructed. This construction method can shorten road occupation time and minimize the interference with surrounding business.