卵漂石铅丝石笼具有经济、简易、透水、柔性、美观等特点,现广泛应用于西藏水土流失治理项目中的拦挡、护岸、沟床固定等工程。应用结果表明:卵漂石铅丝笼用于西藏各行业开发建设项目的挡土墙、挡渣墙时,当拦挡高度h≤1.5 m时,可直接采用矩形、梯形、直角梯形断面;当拦挡高度1.5 m＜h＜5 m时,采用台阶矩形断面。卵漂石铅丝笼用于坝式护岸护滩工程时,断面多采用台阶梯形和梯形,基础埋深根据冲刷深度确定,若冲深＞1.0 m,将基础埋深控制在1.0 m以内,0.5 m左右为宜。在顺直段、地基好、不宜受淘刷的河段,顺坝长度可根据铅丝笼每卷长度分段;在河流弯道和易发生不均匀沉降、易淘刷部位以8~15 m为宜。实践证明:卵漂石铅丝笼顺坝、丁坝具有良好的抗变形适应性和抗冲刷性,即使在山洪作用下基础被淘空导致整体垮塌的情况下仍能发挥作用,在汛后利用垮塌石笼作为基脚在其上补做护岸工程效果更佳。

Gravel and boulder gabion, which is economical, simple, permeable, flexible, and aesthetic, is widely applied to the blocking, bank protection, and gully stabilization works of water and soil loss control projects in Tibet autonomous region in China. We summarize that when gravel and boulder gabion is applied to retaining walls in various construction projects in Tibet, if the retaining height h≤1.5m, the shape of gravel and boulder gabion’s cross-section can be rectangular, trapezoid, and right trapezoid; while when 1.5m＜h＜5m, stepped rectangular section can be adopted. Moreover, when gravel and boulder gabion is applied to bank protection and shoal protection works (spur dike and longitudinal dike), stepped trapezoid and trapezoid cross-sections are mostly adopted. The embedded depth of gabion is determined according to erosion depth. When erosion depth is larger than 1.0m, the embedded depth of gabion should be controlled within 1.0m, best around 0.5m. In straight river segments with good foundation and less scouring, the length of longitudinal dike can be partitioned into segments according to the length of gabions per roll; whereas in bending rivers with scouring and non-uniform settlement, the length of longitudinal dike is recommended to be 8-15m. Practice proved that longitudinal dike and spur dike made of gravel and boulder gabions have good resistance to deformation and erosion. They can also work even when the foundation is scoured and collapsed under mountain torrents. After mountain torrents, better effect can be obtained to make up further bank protection project on the basis of the collapsed gabions.