桥梁孔跨安排绳尺小结(国外英文资料).docVIP

桥梁孔跨布置原则小结(国外英文资料) Principle 19: due to the influence of bad geology, the layout should follow the following points: (1) the base of the platform should not be set on the soft and uneven foundation soil. (2) the site should avoid fault, landslide, crush broken belt, limestone cave The bad geology such as the karst, loess cave and dark hole or local soft ground. (3) when building a platform on a steep hillside, it should pay attention to the stability of the base and the lateral rock Sex. (4) the foundation of the ridges near the steep rock wall should be avoided by the fall of an underwater hillside Accumulation. Principle 20: building a bridge in a longer historic area Address clear structures of existing or remain in the area of investigation, such as underground pipeline (water supply pipe, drainage pipe, communication optical cable, cable, gas pipes, etc.), revetment, wharf, flood prevention wall, embankments and the ripped-rock revetment and other kinds of hydraulic structures, properties and structure of all kinds of buildings and so on, in order to determine whether the pier foundation give way, or the original structure demolition, modification, or to close to the base structure to take protective measures, etc., if necessary, deal with adjacent buildings, structures or to evaluate stability of soil. Principle 21: in the interchanges, and layout of the bridge should be avoid as far as possible bifurcate bridge or a sharp turn, if unavoidable, should be in the crotch, bridge deck width fusion or a sharp turn in set up the bridge, the bridge bearing in good condition. In addition, in the intermodal three-dimensional intersecting, the arrangement of the bridge group on the horizontal surface should strive for symmetry, and the bridge is well permeable. Principle 22: for crossing river and then to realize large-scale bridge of interchange and riverside road, to properly handle the good points across across a river and overpass the problem of the relationship be