Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cast-in-place arch bridge full arch frame stacking preloading method
The invention provides a cast-in-place arch bridge full arch frame stacking preloading method, which comprises the following steps of: arranging monitoring section control points at arch feet, arch ring 1/8L, arch ring 1/4L, arch ring 3/8L and arch top, and arranging five top surface monitoring points on the top surface of a bracket of each monitoring section, foundation settlement deformation monitoring points are arranged at the upper and lower corresponding positions of the top surface monitoring point; pre-pressing loads are loaded in a graded mode according to the pre-pressing loads, in the loading process of each stage, the number of ton bags and the number of water bags of the heaped loads are calculated based on the heaped loads and the volumes of the water bags, pre-pressing is conducted in the mode that the ton bags are filled with sand gravels and combined with the water bags, and the arch frame pre-pressing loads are symmetrically applied in the arch span direction in a segmented mode; and in the lagging jack loading process, bracket pre-pressing monitoring information of the monitoring points is measured and recorded. The pre-pressing effect is achieved, and the stress form of the arch ring is accurately simulated, that is, the arch foot part bears the maximum stress and bears the action of horizontal thrust, and the stress characteristics of the arch ring are better met.
本发明提供了一种现浇拱桥满堂拱架堆载预压方法，该预压方法包括如下步骤：将监测断面控制点布设在拱脚、拱圈1/8L、拱圈1/4L、拱圈3/8L、拱顶处，在每个监测断面的支架顶面各布置5个顶面监测点，并在顶面监测点上下对应位置设置地基沉降变形监测点；按照预压荷载分级加载预压荷载，每级加载过程中，基于堆载荷载和水袋体积计算堆载的吨袋和水袋数量，并利用吨袋装填砂砾石和水袋结合的方式进行预压，拱架预压加载沿拱跨方向分段、对称施加；在拱架加载过程中，测量并记录监测点的支架预压监测信息。本发明实现预压效果，准确的模拟了拱圈的受力形式，即：拱脚部位受力最大，且受到了水平推力的作用，比较符合拱圈受力特点。
Cast-in-place arch bridge full arch frame stacking preloading method
The invention provides a cast-in-place arch bridge full arch frame stacking preloading method, which comprises the following steps of: arranging monitoring section control points at arch feet, arch ring 1/8L, arch ring 1/4L, arch ring 3/8L and arch top, and arranging five top surface monitoring points on the top surface of a bracket of each monitoring section, foundation settlement deformation monitoring points are arranged at the upper and lower corresponding positions of the top surface monitoring point; pre-pressing loads are loaded in a graded mode according to the pre-pressing loads, in the loading process of each stage, the number of ton bags and the number of water bags of the heaped loads are calculated based on the heaped loads and the volumes of the water bags, pre-pressing is conducted in the mode that the ton bags are filled with sand gravels and combined with the water bags, and the arch frame pre-pressing loads are symmetrically applied in the arch span direction in a segmented mode; and in the lagging jack loading process, bracket pre-pressing monitoring information of the monitoring points is measured and recorded. The pre-pressing effect is achieved, and the stress form of the arch ring is accurately simulated, that is, the arch foot part bears the maximum stress and bears the action of horizontal thrust, and the stress characteristics of the arch ring are better met.
本发明提供了一种现浇拱桥满堂拱架堆载预压方法，该预压方法包括如下步骤：将监测断面控制点布设在拱脚、拱圈1/8L、拱圈1/4L、拱圈3/8L、拱顶处，在每个监测断面的支架顶面各布置5个顶面监测点，并在顶面监测点上下对应位置设置地基沉降变形监测点；按照预压荷载分级加载预压荷载，每级加载过程中，基于堆载荷载和水袋体积计算堆载的吨袋和水袋数量，并利用吨袋装填砂砾石和水袋结合的方式进行预压，拱架预压加载沿拱跨方向分段、对称施加；在拱架加载过程中，测量并记录监测点的支架预压监测信息。本发明实现预压效果，准确的模拟了拱圈的受力形式，即：拱脚部位受力最大，且受到了水平推力的作用，比较符合拱圈受力特点。
Cast-in-place arch bridge full arch frame stacking preloading method
一种现浇拱桥满堂拱架堆载预压方法
SHU ZHENGQI (Autor:in) / WANG YU (Autor:in) / ZHANG WENLONG (Autor:in) / CHEN ZHIJUN (Autor:in) / ZHANG CHANGCHUN (Autor:in) / LI RUICHUN (Autor:in)
03.01.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
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