Abstract:Based on test data collected, this paper has summarized on load carrying behavior of pile group. These load carrying behavior include: settlement of pile group; “weakening effect” and “reinforcing effect” of lower pile cap; Q-s curves of pile group; wide density pile group foundation.

Abstract:Based on the theoretical distribution of frictional stress, the maximal pullout resistance formula of wholly grouted anchor is derived. The suitability and influence factors are also discussed. The authors provide theoretical principle for design and calculation of anchors.

Abstract:The strengthening mechanism and function of a cushion in the pile foundation are analyzed. The influence of cushion to loading tests and pile-soil horizontal loading ration is studied. The suggestion that the criterions of deciding loading capacity in rigid pile composite foundation be studied is put forward.

Abstract:The frequency theory of law strain dynamic pipe measurement is sketched. The frequency formula is deduced out. The relationship between exciting material, frequency and length of piles is reached.

Abstract:钢筋混凝土预制板桩是天津海河堤岸改造工程古文化街段护岸的主要地下结构形式，简要介绍了预制板桩的成槽、插板施工工艺和施工过程中的质量控制及取得的效果。

Abstract:斜桩的嵌岩施工目前在国内为数不多，施工难度较大，在各个环节上需要采用与普通钻孔灌注桩所不同的技术，才可以按设计要求完成施工。江西境内长江南岸某码头就设计了大口径钢管斜桩，根据该工程的特点，采取了一系列的技术措施，圆满地完成了该码头的基础施工。

Abstract:通过实际工程，对湿陷性黄土在强夯处理前、后各项物理力学性质指标作了对比，评价了夯实效果，并分析了原因。对强夯法处理湿陷性黄土提出了几点建议。

Abstract:龙岩城区次生红粘土分布较广，大多具上硬下软特征，工程地质条件较差，对其特征进行分析，各建筑物采用不同处理方法，有利于建筑物的稳定。

Abstract:通过对福宁高速公路软土地基沉降观测数据的分析及对最终沉降量的推算，指出软基处理工后沉降的不可避免性；同时，通过对本工程出现异常情况产生原因的分析，提出软基加固处理的调整方案。

Abstract:结合具体的地质条件和试验结果，重点介绍了单管高压旋喷技术第一次在新疆地区高速公路地基病害处理中的成功应用。

Abstract:拟建的江苏国际图书中心地下存在原老楼预制方桩基础，采用高压环喷拔桩进行清障处理。介绍了其施工难点及施工工艺流程。

Abstract:分析了传统的断桩处理方法的优缺点，介绍了一种快速接桩法。

Abstract:通过对堵管原因进行详细分类分析，为避免及处理类似事故提供经验，同时结合生产实践经验及反复的工艺改进，研究了处理事故的可行性设备与方法。

Abstract:This paper discussed modeling about microtunneling pipejacking, HDD and ram construction in China, especially as the microtunneling X-Y system in laser target and how it developed to the singular point and limit cycles for a dynamic system, and then location by the frame which stability/robust stability theory and flexible multibody theory.

Abstract:采用定向钻进方法穿越北京分钟寺桥铺设中压燃气管道。待铺设管材为529 mm双面焊螺旋钢管，穿越长度为350 m。本工程中采用了先进的设备和施工工艺克服了砂层成孔难、回拉阻力大、铺设管径大、长线布管等技术难题，保证了工程顺利竣工。详细介绍了本次施工钻进、扩孔、布管及拉管等工艺方法。

Abstract:The design idea, main technical parameters, structure of parts and test cases are introduced.

Abstract:As a kind of perfect and advanced drilling technique, foam drilling method is accepted by drilling industry in many other coutries, but the high press air-compressor, which has disadvantages of high technical requirement, price and operating cost, extremely limits use and generalization of foam drilling technique; The foam pump booster resolved these problems, which has some advantages of low price, simple structure, handling ease and convenient using, to obtaining optimum structure, we built the experiment equipment for pressure device, and research the increasing capability and the cubage flow rate of it.

Abstract:In this paper conditions of normal drilling are discussed. It is proposed that discharging cuttings optimally is a key ensuring normal drilling and one of the main bases in designing diamond bit. The dependences of the cuttings regime upon working states of diamond bit face, bottom unevenness and chips size considered and corresponding suggestions given.

Abstract:甘肃某金属矿山4口大口径工程钻孔孔径311~430 mm，孔深675 m。采用普利门随钻仪、φ120 mm螺杆钻具进行定向钻探施工，达到了终孔点水平偏距≯6.75 m的要求。

Abstract:在阳泉、古交、娄烦三地的水井施工中，针对奥陶系地层存在冲洗液漏失，岩石坍塌、掉块等施工难题，探索一套切实可行的施工方案。

Abstract:Calculation methods of under balanced formation pressure under existing technology and its defects are introduced. Down hole pressure collection joints are development. Air/liquid double phase pressure down the well was measured during well shut off through in situ test. A new formation pressure calculation method was established based on conventional well test theory and formation transfusion theory and using measured data. The method was established on pressure balance around well wall and the down hole pressure at balance point which was actually measured. It eliminated the errors caused by unstable casing and stand pipe pressure and imprecise drilling fluid density. It can precisely calculate the formation pressures along the borehole. The calculated pressure by the method is much closed to actual pressures. The calculation errors of well shut off pressure were down about 4%.

Abstract:随着井下瓦斯抽放孔钻孔深度和施工总进尺逐年增加，钻进过程中遇到砂质泥岩、页岩等松软遇水膨胀复杂地层的情况经常出现，又因施工地层多为瓦斯富集地层，容易造成喷孔、塌孔、卡钻、埋钻等孔内事故。阐述了复杂地层施工瓦斯抽放钻孔经常遇到的一些孔内事故的预防及处理措施。

Abstract:通过定远盐矿20口采卤井的成功建成，总结出一套较为完整的盐田成井工艺。其中钻井技术主要有设备选择、钻进方法、钻进参数选择、取心技术、泥浆护壁、防斜措施等；固井主要包括下管及其准备工作、固表层套管、固技术套管等。

Abstract:结合多年工程实践，详细介绍了“无岔道平巷调车法”这一新工艺的原理特点、适用范围、操作方法、技术经济性能等，通过与传统调车法的量性对比，说明该工艺高效性及实用性的特点。

Abstract:最近几年，欧洲一些国家联合起来，探索和研究把先进的太空机器人技术引进滑坡和高陡边坡加固，尝试用可以登山的机器人代替工人在有危险的滑坡和高陡边坡上作业。其主要构想是，采用太空自动化技术和遥控技术制造出带钻机的登山机器人，操作人员在安全的地方，通过遥控机器人在滑坡和高陡边坡上施工。叙述了这项新技术的研究背景、目的用途、登山机器人的结构、工作原理、研究进展及优越性。