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A platform for research: civil engineering, architecture and urbanism
400 km/h or above high-speed rail strong expansive rock deep cutting integral retaining structure and construction method
The invention discloses a 400 km/h or above high-speed rail strong expansive rock deep cutting integral retaining structure and a construction method. The structure comprises an arch rib arranged on an excavation base surface of the strong expansive rock deep cutting, the arch rib is of a plate-type structure and is bent downwards. A plurality of anchoring piles are arranged at the slope toe of the strong expansive rock deep cutting on the two sides of the arch rib at intervals; a connecting beam is arranged between the adjacent anchoring piles on each side of the arch rib, the arch rib, the anchoring piles and the connecting beams are rigidly connected to form an integral retaining structure, the prestressed anchor cables are driven into a foundation below the arch rib, and all the prestressed anchor cables are anchored on the arch rib. The arch ribs, the anchoring piles and the connecting beams are rigidly connected to form an integral retaining structure; a novel overall stress andforce transmission system is formed, upward arching deformation of a base is controlled, excavation of deep cutting earthwork is reduced, the economical efficiency of the retaining structure is greatly improved, and the strict control requirements of high-speed railways with the speed of 400 km/h or above for safety, comfort, deformation and the like are met.
本发明公开了一种400km/h及以上高铁强膨胀岩深路堑整体支挡结构及施工方法，其结构包括设置在强膨胀岩深路堑开挖基底面的拱肋，所述拱肋为板式结构且向下弯曲，所述拱肋两侧强膨胀岩深路堑坡脚间隔设置若干根锚固桩，在拱肋每侧相邻的锚固桩间设置有连接梁，所述拱肋、锚固桩和连接梁三者通过刚性连接构成整体支挡结构，还包括朝拱肋下方地基中打设的若干根预应力锚索，所有的预应力锚索锚固于所述拱肋上。由于拱肋、锚固桩和连接梁三者通过刚性连接形成整体支挡结构，形成新的整体受力与传力体系，既控制基底的上拱变形，又减少深路堑土石方开挖，支挡结构经济性大大提高，满足400km/h及以上高速铁路对安全性、舒适性、变形等的严格控制要求。
400 km/h or above high-speed rail strong expansive rock deep cutting integral retaining structure and construction method
The invention discloses a 400 km/h or above high-speed rail strong expansive rock deep cutting integral retaining structure and a construction method. The structure comprises an arch rib arranged on an excavation base surface of the strong expansive rock deep cutting, the arch rib is of a plate-type structure and is bent downwards. A plurality of anchoring piles are arranged at the slope toe of the strong expansive rock deep cutting on the two sides of the arch rib at intervals; a connecting beam is arranged between the adjacent anchoring piles on each side of the arch rib, the arch rib, the anchoring piles and the connecting beams are rigidly connected to form an integral retaining structure, the prestressed anchor cables are driven into a foundation below the arch rib, and all the prestressed anchor cables are anchored on the arch rib. The arch ribs, the anchoring piles and the connecting beams are rigidly connected to form an integral retaining structure; a novel overall stress andforce transmission system is formed, upward arching deformation of a base is controlled, excavation of deep cutting earthwork is reduced, the economical efficiency of the retaining structure is greatly improved, and the strict control requirements of high-speed railways with the speed of 400 km/h or above for safety, comfort, deformation and the like are met.
本发明公开了一种400km/h及以上高铁强膨胀岩深路堑整体支挡结构及施工方法，其结构包括设置在强膨胀岩深路堑开挖基底面的拱肋，所述拱肋为板式结构且向下弯曲，所述拱肋两侧强膨胀岩深路堑坡脚间隔设置若干根锚固桩，在拱肋每侧相邻的锚固桩间设置有连接梁，所述拱肋、锚固桩和连接梁三者通过刚性连接构成整体支挡结构，还包括朝拱肋下方地基中打设的若干根预应力锚索，所有的预应力锚索锚固于所述拱肋上。由于拱肋、锚固桩和连接梁三者通过刚性连接形成整体支挡结构，形成新的整体受力与传力体系，既控制基底的上拱变形，又减少深路堑土石方开挖，支挡结构经济性大大提高，满足400km/h及以上高速铁路对安全性、舒适性、变形等的严格控制要求。
400 km/h or above high-speed rail strong expansive rock deep cutting integral retaining structure and construction method
400km/h及以上高铁强膨胀岩深路堑整体支挡结构及施工方法
ZHANG TAO (author) / XUE YUAN (author) / WANG ZHIMENG (author) / LI ANHONG (author) / YAO YUCHUN (author) / ZHANG SHUO (author) / ZHANG DONGQING (author) / XIAO CHAOQIAN (author) / ZHOU BO (author) / ZHANG JIANWEN (author)
2020-08-07
Patent
Electronic Resource
Chinese
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