A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Anti-frost heaving high-speed rail roadbed structure in seasonal frozen soil region
The invention relates to an anti-frost heaving high-speed rail roadbed structure in a seasonal frozen soil region, the overall upper section of the roadbed structure is trapezoidal, and the design structure sequentially comprises a concrete layer, a waterproof geotextile, a graded broken stone layer, a thermal insulation layer, an anti-freezing A/B filler layer, a common A/B filler layer and a foundation from top to bottom; wherein water seepage blind ditches are formed in the common A/B filler layer, and arc-shaped geotechnical cloth is laid at the bottom of the common A/B filler layer. The waterproof geotextile prevents water permeating from the concrete layer and reduces the amount of water permeating into the roadbed filler; the thermal insulation layer reduces the temperature gradient in the roadbed by preventing heat transfer, weakens the driving force of underground water to migrate to the roadbed and reduces the moisture migration amount; foundation pore water forms ultra-static pore water pressure under the action of train load, and the pore water under the ultra-static pore water pressure migrates in the tangential direction of the arc-shaped geotechnical cloth under the dredging of the arc-shaped geotechnical cloth, so that the migration amount of underground water into roadbed filler is reduced. The high-speed rail roadbed structure integrates the frost heaving prevention and treatment design thought of active temperature control and active moisture dredging. According to the invention, frost heaving of the high-speed rail roadbed in the seasonal frozen soil region can be reduced, and the long-term stability of the high-speed rail roadbed structure in the seasonal frozen soil region is improved.
本发明涉及一种季节冻土区防冻胀的高铁路基结构，该路基结构整体上截面为梯形，设计结构从上往下依次为混凝土层，隔水土工布，级配碎石层、保温层、防冻A/B填料层、普通A/B填料层、地基；其中在普通A/B填料层中设置渗水盲沟，并在普通A/B填料层底部铺设弧形土工布。隔水土工布阻止由混凝土层渗入的水分，减少向路基填料的水分渗入量；保温层通过阻止热量传递降低路基中的温度梯度，弱化地下水向路基迁移的驱动力，减少水分迁移量；地基孔隙水在列车荷载作用下形成超静孔隙水压力，在弧形土工布的疏导下处于超静孔隙水压力下的孔隙水沿着弧形土工布切线方向迁移，减少地下水向路基填料中的迁移量。该高铁路基结构综合了主动控温和主动水分疏导的冻胀防治设计思路。本发明能够减少季节冻土区高铁路基冻胀病害的发生，提高季节冻土区高铁路基结构的长期稳定性。
Anti-frost heaving high-speed rail roadbed structure in seasonal frozen soil region
The invention relates to an anti-frost heaving high-speed rail roadbed structure in a seasonal frozen soil region, the overall upper section of the roadbed structure is trapezoidal, and the design structure sequentially comprises a concrete layer, a waterproof geotextile, a graded broken stone layer, a thermal insulation layer, an anti-freezing A/B filler layer, a common A/B filler layer and a foundation from top to bottom; wherein water seepage blind ditches are formed in the common A/B filler layer, and arc-shaped geotechnical cloth is laid at the bottom of the common A/B filler layer. The waterproof geotextile prevents water permeating from the concrete layer and reduces the amount of water permeating into the roadbed filler; the thermal insulation layer reduces the temperature gradient in the roadbed by preventing heat transfer, weakens the driving force of underground water to migrate to the roadbed and reduces the moisture migration amount; foundation pore water forms ultra-static pore water pressure under the action of train load, and the pore water under the ultra-static pore water pressure migrates in the tangential direction of the arc-shaped geotechnical cloth under the dredging of the arc-shaped geotechnical cloth, so that the migration amount of underground water into roadbed filler is reduced. The high-speed rail roadbed structure integrates the frost heaving prevention and treatment design thought of active temperature control and active moisture dredging. According to the invention, frost heaving of the high-speed rail roadbed in the seasonal frozen soil region can be reduced, and the long-term stability of the high-speed rail roadbed structure in the seasonal frozen soil region is improved.
本发明涉及一种季节冻土区防冻胀的高铁路基结构，该路基结构整体上截面为梯形，设计结构从上往下依次为混凝土层，隔水土工布，级配碎石层、保温层、防冻A/B填料层、普通A/B填料层、地基；其中在普通A/B填料层中设置渗水盲沟，并在普通A/B填料层底部铺设弧形土工布。隔水土工布阻止由混凝土层渗入的水分，减少向路基填料的水分渗入量；保温层通过阻止热量传递降低路基中的温度梯度，弱化地下水向路基迁移的驱动力，减少水分迁移量；地基孔隙水在列车荷载作用下形成超静孔隙水压力，在弧形土工布的疏导下处于超静孔隙水压力下的孔隙水沿着弧形土工布切线方向迁移，减少地下水向路基填料中的迁移量。该高铁路基结构综合了主动控温和主动水分疏导的冻胀防治设计思路。本发明能够减少季节冻土区高铁路基冻胀病害的发生，提高季节冻土区高铁路基结构的长期稳定性。
Anti-frost heaving high-speed rail roadbed structure in seasonal frozen soil region
一种季节冻土区防冻胀高铁路基结构
SHI YAJUN (author) / MA WEI (author) / MU YANHU (author) / YANG CHENGSONG (author) / ZHANG LIANHAI (author) / LIU FURONG (author)
2024-03-05
Patent
Electronic Resource
Chinese
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