A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for controlling bridge deformation in engineering of underneath passing high-speed railway bridge on road
The invention provides a method for controlling bridge deformation in a road underneath pass high-speed rail bridge project. The method comprises the steps: calculating the lengths of U-shaped grooves in a lower jacking section and a cast-in-place section of an existing high-speed rail bridge, the distance between a foundation pit and the existing high-speed rail bridge and the number and length of underground road protection piles on the two sides of the U-shaped grooves in the underneath pass range of the existing high-speed rail bridge; excavating a foundation pit in a layered mode, prefabricating a jacking section U-shaped groove structure, arranging a temporary U-shaped groove jacking rigid frame on the jacking section U-shaped groove structure, constructing a back pile, and installing a jack jacking system; while the foundation pit is excavated, constructing road protection piles; solidifying soil under a bottom plate of the U-shaped groove structure of the jacking section; gradually jacking the jacking section U-shaped groove in the direction of the existing high-speed railway bridge along the designed gradient, and excavating a soil body at the front end of the jacking section U-shaped groove while jacking is conducted; in the jacking process, dynamically controlling the ballasting measures; after the U-shaped groove of the jacking section is in place, constructing the U-shaped groove of the cast-in-place section; and gradually reducing the weight. The bridge pier abutment top deformation can be controlled to meet the new regulation requirement.
本发明提供了一种道路下穿高铁桥梁工程中控制桥梁变形的方法，计算既有高铁桥梁下顶进段及现浇段U型槽长度、基坑与既有高铁桥梁的距离、下穿既有高铁桥梁范围U型槽两侧的地面下道路防护桩的数量和长度；分层开挖基坑，预制顶进段U型槽结构，顶进段U型槽结构上设置临时U型槽顶刚架，施工后背桩并安装千斤顶顶进系统；开挖基坑的同时，施作道路防护桩；顶进段U型槽结构底板下度土体固化处理；将顶进段U型槽沿设计坡度逐步向既有高铁桥梁方向顶进，顶进段U型槽前端土体在顶进的同时挖除；顶进过程中，动态控制压重措施；顶进段U型槽就位后，施作现浇段U型槽；逐步减少压重措施。本发明可以控制桥墩台顶变形满足新规程要求。
Method for controlling bridge deformation in engineering of underneath passing high-speed railway bridge on road
The invention provides a method for controlling bridge deformation in a road underneath pass high-speed rail bridge project. The method comprises the steps: calculating the lengths of U-shaped grooves in a lower jacking section and a cast-in-place section of an existing high-speed rail bridge, the distance between a foundation pit and the existing high-speed rail bridge and the number and length of underground road protection piles on the two sides of the U-shaped grooves in the underneath pass range of the existing high-speed rail bridge; excavating a foundation pit in a layered mode, prefabricating a jacking section U-shaped groove structure, arranging a temporary U-shaped groove jacking rigid frame on the jacking section U-shaped groove structure, constructing a back pile, and installing a jack jacking system; while the foundation pit is excavated, constructing road protection piles; solidifying soil under a bottom plate of the U-shaped groove structure of the jacking section; gradually jacking the jacking section U-shaped groove in the direction of the existing high-speed railway bridge along the designed gradient, and excavating a soil body at the front end of the jacking section U-shaped groove while jacking is conducted; in the jacking process, dynamically controlling the ballasting measures; after the U-shaped groove of the jacking section is in place, constructing the U-shaped groove of the cast-in-place section; and gradually reducing the weight. The bridge pier abutment top deformation can be controlled to meet the new regulation requirement.
本发明提供了一种道路下穿高铁桥梁工程中控制桥梁变形的方法，计算既有高铁桥梁下顶进段及现浇段U型槽长度、基坑与既有高铁桥梁的距离、下穿既有高铁桥梁范围U型槽两侧的地面下道路防护桩的数量和长度；分层开挖基坑，预制顶进段U型槽结构，顶进段U型槽结构上设置临时U型槽顶刚架，施工后背桩并安装千斤顶顶进系统；开挖基坑的同时，施作道路防护桩；顶进段U型槽结构底板下度土体固化处理；将顶进段U型槽沿设计坡度逐步向既有高铁桥梁方向顶进，顶进段U型槽前端土体在顶进的同时挖除；顶进过程中，动态控制压重措施；顶进段U型槽就位后，施作现浇段U型槽；逐步减少压重措施。本发明可以控制桥墩台顶变形满足新规程要求。
Method for controlling bridge deformation in engineering of underneath passing high-speed railway bridge on road
一种道路下穿高铁桥梁工程中控制桥梁变形的方法
YOU GUANGJIE (author) / CAO QUAN (author) / WANG LU (author) / WANG YAN (author) / LI LI (author) / ZHOU JINBIN (author) / ZHAO YANFENG (author) / LIU XIANGQIONG (author) / GAO RONGHUI (author)
2021-07-09
Patent
Electronic Resource
Chinese
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