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A platform for research: civil engineering, architecture and urbanism
Construction method for additionally building high-speed railway roadbed in parallel with existing high-speed railway
The invention provides a construction method for additionally building a high-speed railway roadbed in parallel with an existing high-speed railway. The method comprises the steps of arranging a lengthened cast-in-situ bored pile at the slope toe of a side slope of the existing high-speed railway roadbed; after the cast-in-situ bored piles reach certain strength, arranging prestressed pipe piles in the subgrade foundation range of the newly-built high-speed railway; removing the slope surface protection of the existing high-speed railway roadbed slope, and digging a large step; pouring a concrete cushion layer on the top of the prestressed pipe pile, laying an impermeable layer, and pouring foam light soil; and constructing roadbed slope protection. Under the condition that the existing high-speed railway with the speed of 350 km/h is parallel, the functional use requirements of the newly-built high-speed railway with the speed of 350 km/h can be met, the roadbed base stress diffusion of the newly-built high-speed railway does not influence the operation of the existing high-speed railway, and the roadbed settlement of the existing high-speed railway is not influenced; the stability of the newly-built roadbed and the existing roadbed, the settlement amount and the transverse displacement in the operation period meet the standard requirements, and the use function requirements of the newly-built roadbed and the existing roadbed are met.
本发明提供了一种并行既有高速铁路增建高速铁路路基的施工方法，于既有高速铁路路基边坡坡脚设置加长钻孔灌注桩；待钻孔灌注桩达到一定强度后，于新建高速铁路路基基范围内设置预应力管桩；拆除既有高速铁路路基边坡坡面防护，挖大台阶；于预应力管桩顶部浇筑混凝土垫层，铺设防渗层，浇筑泡沫轻质土；施工路基边坡防护。本发明可使在并行既有时速350km/h高速铁路情况下，满足新建的时速350km/h高速铁路的功能使用要求，使新建高速铁路路基基底应力扩散不影响既有高速铁路运营，不影响既有高速铁路的路基沉降；保证新建路基和既有路基的稳定性和运营期间的沉降量和横向位移满足规范要求，满足新建路基和既有路基的使用功能要求。
Construction method for additionally building high-speed railway roadbed in parallel with existing high-speed railway
The invention provides a construction method for additionally building a high-speed railway roadbed in parallel with an existing high-speed railway. The method comprises the steps of arranging a lengthened cast-in-situ bored pile at the slope toe of a side slope of the existing high-speed railway roadbed; after the cast-in-situ bored piles reach certain strength, arranging prestressed pipe piles in the subgrade foundation range of the newly-built high-speed railway; removing the slope surface protection of the existing high-speed railway roadbed slope, and digging a large step; pouring a concrete cushion layer on the top of the prestressed pipe pile, laying an impermeable layer, and pouring foam light soil; and constructing roadbed slope protection. Under the condition that the existing high-speed railway with the speed of 350 km/h is parallel, the functional use requirements of the newly-built high-speed railway with the speed of 350 km/h can be met, the roadbed base stress diffusion of the newly-built high-speed railway does not influence the operation of the existing high-speed railway, and the roadbed settlement of the existing high-speed railway is not influenced; the stability of the newly-built roadbed and the existing roadbed, the settlement amount and the transverse displacement in the operation period meet the standard requirements, and the use function requirements of the newly-built roadbed and the existing roadbed are met.
本发明提供了一种并行既有高速铁路增建高速铁路路基的施工方法，于既有高速铁路路基边坡坡脚设置加长钻孔灌注桩；待钻孔灌注桩达到一定强度后，于新建高速铁路路基基范围内设置预应力管桩；拆除既有高速铁路路基边坡坡面防护，挖大台阶；于预应力管桩顶部浇筑混凝土垫层，铺设防渗层，浇筑泡沫轻质土；施工路基边坡防护。本发明可使在并行既有时速350km/h高速铁路情况下，满足新建的时速350km/h高速铁路的功能使用要求，使新建高速铁路路基基底应力扩散不影响既有高速铁路运营，不影响既有高速铁路的路基沉降；保证新建路基和既有路基的稳定性和运营期间的沉降量和横向位移满足规范要求，满足新建路基和既有路基的使用功能要求。
Construction method for additionally building high-speed railway roadbed in parallel with existing high-speed railway
一种并行既有高速铁路增建高速铁路路基的施工方法
ZHANG XIANG (author) / ZHOU KAI (author) / LI XIAOFEI (author) / NIU FENGMING (author) / WANG FEI (author) / YU DONGBIN (author) / FAN JUNHUAI (author) / OU CHENGZHANG (author) / MA WENJUN (author) / XU WENLONG (author)
2021-08-10
Patent
Electronic Resource
Chinese
High-speed railway roadbed reinforcing treatment construction technology
| European Patent Office | 2020
| European Patent Office | 2020