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A platform for research: civil engineering, architecture and urbanism
Fill subgrade construction method suitable for water-rich low-lying permafrost region
The invention discloses a fill subgrade construction method suitable for a water-rich low-lying permafrost region. The fill subgrade construction method comprises the following steps of stamping flagstone silt squeezing replacement construction being conducted; filling a rubble layer cooling layer; paving two pieces of cloth and one film; paving a gravel layer; constructing a roadbed slope toe heat preservation protective channel; laying inverted filter geotextile; paving a gravel layer; paving a gravel cushion layer; and loading subgrade filler which is compact in filling and good in water permeability. According to the method, silt is squeezed and replaced by impacting and rolling the rubble layer, the bearing capacity of the foundation is improved, meanwhile, underground water is prevented from rising to roadbed soil under the action of capillary water, and it is guaranteed that the roadbed is dry; the rubble cooling layer being filled, good gaps among rubbles being utilized to formnatural air convection in winter, and the temperature of permafrost being actively reduced; paving a two-cloth one-film impermeable layer to prevent water in the roadbed body from infiltrating into the permafrost region. The water seepage geotextile and the gravel paving layer have high drainage performance, and the roadbed slope toe heat preservation protective channel prevents frost heaving diseases of a slope toe and prevents slope toe surface water from seeping into a roadbed soil body.
本发明公开了一种适用于富水低洼多年冻土区的填方路基施工方法，包括以下步骤：冲压片石挤淤换填施工；填筑片石层降温层；铺设两布一膜；铺砌砂砾层；路基边坡坡脚保温护道施工；铺设反滤土工布；铺砌砂砾层；铺砌砂砾垫层；填筑密实、透水性良好的路基填料。该方法利用冲击碾压片石层挤淤换填，提高地基承载力，同时阻断地下水通过毛细水作用上升到路基土体，保证路基干燥；填筑片石降温层，冬季利用片石间良好空隙形成空气自然对流，可主动降低多年冻土温度；铺设两布一膜不透水层，阻止路基体内水分下渗到多年冻土区；渗水土工布及砂砾铺砌层具有较强的排水性，路基坡脚保温护道防止坡脚的冻胀病害并阻断坡脚地表水渗入到路基土体内。
Fill subgrade construction method suitable for water-rich low-lying permafrost region
The invention discloses a fill subgrade construction method suitable for a water-rich low-lying permafrost region. The fill subgrade construction method comprises the following steps of stamping flagstone silt squeezing replacement construction being conducted; filling a rubble layer cooling layer; paving two pieces of cloth and one film; paving a gravel layer; constructing a roadbed slope toe heat preservation protective channel; laying inverted filter geotextile; paving a gravel layer; paving a gravel cushion layer; and loading subgrade filler which is compact in filling and good in water permeability. According to the method, silt is squeezed and replaced by impacting and rolling the rubble layer, the bearing capacity of the foundation is improved, meanwhile, underground water is prevented from rising to roadbed soil under the action of capillary water, and it is guaranteed that the roadbed is dry; the rubble cooling layer being filled, good gaps among rubbles being utilized to formnatural air convection in winter, and the temperature of permafrost being actively reduced; paving a two-cloth one-film impermeable layer to prevent water in the roadbed body from infiltrating into the permafrost region. The water seepage geotextile and the gravel paving layer have high drainage performance, and the roadbed slope toe heat preservation protective channel prevents frost heaving diseases of a slope toe and prevents slope toe surface water from seeping into a roadbed soil body.
本发明公开了一种适用于富水低洼多年冻土区的填方路基施工方法，包括以下步骤：冲压片石挤淤换填施工；填筑片石层降温层；铺设两布一膜；铺砌砂砾层；路基边坡坡脚保温护道施工；铺设反滤土工布；铺砌砂砾层；铺砌砂砾垫层；填筑密实、透水性良好的路基填料。该方法利用冲击碾压片石层挤淤换填，提高地基承载力，同时阻断地下水通过毛细水作用上升到路基土体，保证路基干燥；填筑片石降温层，冬季利用片石间良好空隙形成空气自然对流，可主动降低多年冻土温度；铺设两布一膜不透水层，阻止路基体内水分下渗到多年冻土区；渗水土工布及砂砾铺砌层具有较强的排水性，路基坡脚保温护道防止坡脚的冻胀病害并阻断坡脚地表水渗入到路基土体内。
Fill subgrade construction method suitable for water-rich low-lying permafrost region
一种适用于富水低洼多年冻土区的填方路基施工方法
WANG LIQUN (author) / ZHAO LIDONG (author) / SUN XIMENG (author) / MA RUI (author) / YE JINHUA (author) / DENG BO (author) / CAO YANHUI (author) / WANG MENGXIAO (author) / ZHANG TAO (author) / WANG LIWEI (author)
2021-01-01
Patent
Electronic Resource
Chinese
IPC:
E01C
Bau von Straßen, Sportplätzen oder dgl., Decken dafür
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CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE
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