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The wall protection mechanism of HJ-1 composition drilling fluid in intricate stratum is analyzed.

分析和探讨了HJ-1复合型钻井液对复杂地层护壁的作用机理及护壁性能试验情况,介绍了其在寨上矿区复杂地层钻探中的成功应用。

An introduction is made on the construction process of artificial hole pile including holing, wall protection, fabrication and installation of reinforcing cage, pile core concrete grouting etc.

介绍人工挖孔桩的成孔、护壁、钢筋笼制作和安装、桩芯混凝土浇灌等施工过程。

Through the construction of the sea wharf bridge approach piling works of Shenneng Oil Depot Project in Qinzhou, the article expounds the basic sea piling construction procedure and techniques of bore-hole wall protection by steel pipe and hole-excavation by hand.

文章通过深能钦州码头油库工程海上码头引桥桩施工的工程实例 ,阐述钢护筒护壁人工挖孔在海上基桩施工的基本工序及施工工艺 ,证实钢护筒护壁人工挖孔施工工艺 ,在地层简单的浅海场地 ,是一种行之有效且无污染、机具简单、成本低、进度快的施工方

Design and construction technique of retaining wall structure of different soil layer for hand dug pile;

人工挖孔桩不同土质层护壁结构设计及施工技术

Based on the characteristics of mega-thickness silt which has rich groundwater, many precipitation schemes and retaining walls were used to add piles with manual pore excavation piles,such as open caisson,and retaining walls with machine drilling,steel reinforcement cage,and consolidating soil around pile hole by strainer spray.

针对地下水丰富的巨厚砂层工程特点,采用沉井、机械钻孔+钢筋笼+滤网定喷固结桩孔周围土体等护壁、降水方案进行人工挖孔桩补桩,成功地对某工程桩基缺陷进行了补救。

When the silt clay or silty sand layer is in saturation sate and under different water discharges,engineers adopt some measures to deal with the construction problems of retaining wall,such as shorting the depth of circularly digging,backfilling flexile material,using steel sleeve and curtain grouting,finally successfully solve these construction problems.

在淤泥质粘土、粉砂层成饱和且在不同涌水量状态下,采取缩短循环开挖深度、回填柔韧性材料、下钢套筒、帷幕注浆等多种施工方案,成功地解决了护壁施工过程中若干工程问题。

Some major settlements are: constructing ultra front hole; ultra section substitution; adding strength by small holes grouting, application of rock embeded strength, blocking up leak and protective wall; the principle of first ease and second difficulty;.

岩溶地区灌注桩施工难度较大，地质条件不同，岩溶发育程度各异，情况不同，处理方法也不同，主要有施工超前孔；超截面代换；小孔注浆补强；嵌岩力的作用；堵漏及护壁；先易后难原则；清渣方法。

There were some innovation in construction, such as highered the upper foundation to overcome the collapse of groove hole and erected construction protective wall, as well as reinforced the foundation to make construction on special geology layer easier.

在施工中,提出改革措施:加高上部基础,克服槽孔上部坍塌,营造良好施工护壁氛围;加固底节强度,解决特殊地层施工难问题,为其它特殊工程的施工提供较好的施工方法。

For the dado of the cast in pile pile with man made hole, a reliability model is set up based on the analysis of its bearing capacity; and a reliability design is carried out on the dado in the light of engineering example.

通过对人工挖孔桩护壁承受外界作用的分析，建立孔桩护壁的可靠度模型。