浩吉铁路弱膨胀土路基基材植生固坡防护技术

浩吉铁路湖北段膨胀土分布广泛，路基边坡防护工程若采取浆砌片石截水骨架护坡加草灌结合方案，远运石料，工程费用昂贵。部分弱膨胀土直填和改良土路堤边坡防护采取混凝土肋条骨架内基材植生固坡方案，通过基材植生在路基边坡上形成不小于6 cm厚度的具有一定强度的硬化体，缓释水分与养分，形成有效的绿色防护体系，既可防止雨水冲刷，固化水土，又可达到恢复植被、改善景观、保护环境的目的。

Matrix Planting Technology for Slope Consolidation and Protection along Weak Expansive Soil Subgrade of Haolebaoji—Jian Railway

In Hubei section of Haolebaoji—Jian railway, there widely distributes expansive soil. The subgrade slope protection works adopting mortar rubble intercepting skeleton with grass and shrub is of far distance for stone transportation and high project cost. At part of the subgrade filled by weak expansive soil directly and improved soil, the slope consolidation scheme of concrete rib skeleton within matrix planting was adopted. On such subgrade slope, a hardened body not less than 6 cm in thickness with a certain strength was formed by matrix planting, which is of slow release of water and nutrients, so that an effective green protection system come into being. The system can not only protect the slope from rain wash, but also recover the vegetation, improve the landscape and protect the environment.