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老哈河是一条丘陵区游荡性河流,河道抗冲能力差,主流经常摆动改进,形成河道险工多,整治困难。多年来主要采用丁坝和沉枕护岸。丁坝多选用短丁坝,布置成丁坝群,丁坝间距可采用丁坝长度的2~3倍,丁坝群的坝头线应布置成一条与整治线相一致的凹岸曲线。沉枕是用杨柳枝、石块等材料束成圆柱状,直径0.6~1.0m,长度5~10m。沉枕具有一定柔性,抗冲性能好,能适应河床变形。施工中可将多个沉枕用铅丝连接起来形成沉排,增加整体抗冲能力。
Laohe River is a hilly wandering rivers, river impulse ability is poor, the mainstream often swing to improve, the formation of a large number of river courses, remediation difficulties. Over the years the main use of Dingba and Shen Zhen pillow revetment. Dingba more selection of short dams, arranged into a small group of dams dam, dyke spacing can be used 2 to 3 times the length of the dikes, dams dam dam line should be arranged in line with the alignment of a concave groove curve. The pillow is made of willow branches, stones and other materials bundled into a cylindrical, diameter 0.6 ~ 1.0m, length 5 ~ 10m. Shen pillow has a certain flexibility, good impact resistance, to adapt to riverbed deformation. Construction of multiple sleepers can be connected with the lead wire to form sink row, increasing the overall impact resistance.