直埋光缆过河沟特殊保护一例姚元平河北省唐山长线局自１９９４年１０月开始维护京沈哈光缆所辖段落。其中有一段光缆穿过深县界内一条宽约１０ｍ的河沟。当时工程施工时采取截流方法埋设光缆，并且用高密度塑料管加以保护，埋深达１ｍ。由于此河沟地处半山区，常年流水不... Buried optical fiber cable across the river a special case of protection Yao Yuanping Hebei Tangshan long-line Bureau since October 1994 to maintain Beijing-Shenyang cable under the jurisdiction of paragraph. There is a section of optical fiber cable through the deep county community within a width of about 10m of the river ditch. At the time of construction, the method of river closure was adopted to embed the optical cable and protected by the high-density plastic pipe with the depth of 1m. Due to this river ditch is located in Mid-levels, perennial water is not ...