支护结构

In the design of rectangular retaining structure,a piece of corner brace is usually used as a safety method in the corner of the pit.

在矩形支护结构设计中，通常在基坑拐角圈梁处加一道角撑作为安全储备。

Research results:The research and demonstration were made on construction order, diversion, grouting process, grouting materials and grouting parameters for the transverse hole and bottom plate of treated underground river as well as supporting structure, prevention and drainage of water for the tunnel during treatment of underground river in order to make the measures feasible.

研究结果：在暗河处理过程中，对处理暗河的横洞、底板的施做顺序、导流、注浆工艺、注浆材料及注浆参数、隧道的支护结构、防排水等提出可行的处理措施。

The paper describes the interior stability analy sis on slope of deep excavation pits in loess soil.

讨论了黄土类深基坑开挖边坡土钉支护结构内部稳定性分析计算和设计方法。

Supporting structures ; deep foundation pit ; construction ; trackways ; safety

支护结构；深基坑；施工；轨道；安全

The annular supporting excavations increase with the popularizing of rotundas and sphere buildings.

随着圆形平面建筑物和球形建筑物的广泛使用，环形的基坑支护结构也日益增多。

At the same time, the finite staff element method is used to analyze the influence of beam rigidity; and the two new methods proposed are used to analyze the influence of connect way between piles and beam; and the conclusion is obtained that the rigidity ratio between beam and piles being 0.48 is appropriate; the continuative increase of the rigidity ratio is not significant; the worst condition is that connecting way between piles and beam is hinged; the best condition is that connecting way between piles and beam is rigid. Whether is single-row pile or are double-row piles, when the front of single-row pile or the front of the front-row pile(in the double-row piles) needed excavation, it is supposed to that ought to be carefulness to excavate, because it is that the engineering cost increased greatly.

同时，用有限杆单元法，对双排桩的连梁刚度和用文中提出的方法以桩梁连接方式进行了试验和理论分析得出如下结论：在满足不相互影响排桩间距的情况下，桩顶连梁与桩的刚度比不小于0.48是合适的，此时再增加连梁刚度无意义；桩梁连接为铰结时双排桩受力变形性质最差，刚结时受力变形性质最好；不论是单排桩还是双排桩，桩前和前排桩桩前土体需要开挖时应慎重，因为这种开挖对支护结构影响很大，造价增加很多；双排桩省钱，而且抵抗变形的能力强，值得在工程中研究和广泛应用

Against the compound transformation problem of existed shield tunnel under construction of foundation pit of the Beixinqiao station in Beijing No.5 subway line, by ANSYS, combining with geological condition and according to the different working condition, three-dimensional numeric models are built and the emulation of the construction process is carried on.

针对北京地铁五号线地铁车站基坑施工条件下既有盾构隧道的复合变形问题，基于ANSYS，结合场地的水文地质和工程地质条件，按照不同的工况建立了三维数值模型，并进行了施工过程的模拟通过对结果的对比和分析，揭示了在不同施工状态下，基坑周围土体、支护结构及既有盾构隧道之间相互作用的过程和机理，以及由此引起的围岩变形的分布与变化规律。

During the excavation of a large and deep foundation pit,a trestle bridge is usually needed to build to facilitate the on-the-spot transportation and the foundation pit construction by virtue of the support structure of the pit.

在大型深基坑开挖过程中，常需要利用基坑的支护结构，建造用于方便现场车辆交通及基坑施工的栈桥。

Based on the research of the mechanism of the top beam, the optimal design of piles in row is discussed.

在此基础上，作者对基坑排桩支护结构的优化设计作了进一步的探讨。

The fourth foundation pits of Nanjing Sunny Community were in stiff-clay area, and its foundation pits were 5.7 m deep, and some parts were excavated to 7.0 m. The excavation support system was column pile wall or braced wall.

南京阳光雅居4期基坑工程处于硬土场地中，基坑开挖深度5.7m，局部7.0m，围护体系采用了人工挖孔灌注桩和土打墙2种支护结构形式。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。