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A platform for research: civil engineering, architecture and urbanism
High backfill structure in narrow space in collapsible loess environment and construction method of high backfill structure
The invention particularly relates to a high backfill structure in a narrow space in a collapsible loess environment and a construction method of the high backfill structure, and solves the problems that in an existing high backfill structure in the narrow space, panax notoginseng lime soil backfill soil is high in permeability, and reinforcement meshes need to be laid. The invention discloses a high backfill structure for a narrow space in a collapsible loess environment. The high backfill structure comprises N pseudo-ginseng lime soil layers and N composite filler layers which are distributed in parallel up and down, the pseudo-ginseng lime soil layers and the composite filler layers are arranged in a staggered manner, and the first pseudo-ginseng lime soil layer is located at the bottom; a backfill material of the composite filler layer is formed by mixing lime, fly ash, screened gravels, cement and water, and the volume ratio of the lime to the fly ash to the screened gravels to the cement is 5: 15: 80: 5; the screened gravel is obtained by crushing and screening waste concrete. The compaction degree and the bearing capacity of the high backfill structure in the narrow space are effectively improved, laying of reinforcing meshes is omitted, the construction cost is reduced, and the high backfill structure is particularly suitable for backfill of the narrow space in the II-level collapsible loess environment.
本发明具体是一种湿陷性黄土环境下狭窄空间的高回填结构及其施工方法，解决了现有狭窄空间的高回填结构存在三七灰土回填土渗透性强、需铺设钢筋网片的问题。一种湿陷性黄土环境下狭窄空间的高回填结构，包括上下平行分布的N个三七灰土层与N个复合填料层；三七灰土层与复合填料层交错布置，且位于底部的是第I三七灰土层；复合填料层的回填料由石灰、粉煤灰、筛分碎石、水泥和水拌合而成，且石灰、粉煤灰、筛分碎石、水泥的体积比为5：15：80：5；所述筛分碎石是废弃混凝土经破碎、筛分而得到的。本发明有效提高了狭窄空间的高回填结构的压实度与承载力，省去了钢筋网片的铺设，降低了施工成本，尤其适用于II级湿陷性黄土环境下狭窄空间的回填。
High backfill structure in narrow space in collapsible loess environment and construction method of high backfill structure
The invention particularly relates to a high backfill structure in a narrow space in a collapsible loess environment and a construction method of the high backfill structure, and solves the problems that in an existing high backfill structure in the narrow space, panax notoginseng lime soil backfill soil is high in permeability, and reinforcement meshes need to be laid. The invention discloses a high backfill structure for a narrow space in a collapsible loess environment. The high backfill structure comprises N pseudo-ginseng lime soil layers and N composite filler layers which are distributed in parallel up and down, the pseudo-ginseng lime soil layers and the composite filler layers are arranged in a staggered manner, and the first pseudo-ginseng lime soil layer is located at the bottom; a backfill material of the composite filler layer is formed by mixing lime, fly ash, screened gravels, cement and water, and the volume ratio of the lime to the fly ash to the screened gravels to the cement is 5: 15: 80: 5; the screened gravel is obtained by crushing and screening waste concrete. The compaction degree and the bearing capacity of the high backfill structure in the narrow space are effectively improved, laying of reinforcing meshes is omitted, the construction cost is reduced, and the high backfill structure is particularly suitable for backfill of the narrow space in the II-level collapsible loess environment.
本发明具体是一种湿陷性黄土环境下狭窄空间的高回填结构及其施工方法，解决了现有狭窄空间的高回填结构存在三七灰土回填土渗透性强、需铺设钢筋网片的问题。一种湿陷性黄土环境下狭窄空间的高回填结构，包括上下平行分布的N个三七灰土层与N个复合填料层；三七灰土层与复合填料层交错布置，且位于底部的是第I三七灰土层；复合填料层的回填料由石灰、粉煤灰、筛分碎石、水泥和水拌合而成，且石灰、粉煤灰、筛分碎石、水泥的体积比为5：15：80：5；所述筛分碎石是废弃混凝土经破碎、筛分而得到的。本发明有效提高了狭窄空间的高回填结构的压实度与承载力，省去了钢筋网片的铺设，降低了施工成本，尤其适用于II级湿陷性黄土环境下狭窄空间的回填。
High backfill structure in narrow space in collapsible loess environment and construction method of high backfill structure
湿陷性黄土环境下狭窄空间的高回填结构及其施工方法
ZHANG RENJIAN (author) / SHAO XINGZHU (author) / FAN JINGJING (author) / QI HONG (author) / WANG WEI (author)
2023-01-10
Patent
Electronic Resource
Chinese
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