电缆检查井的施工技术措施

电缆检查井施工技术措施

电缆管道敷设

在混凝土底板上铺设10cm厚的中砂垫层，铺设电缆管，管沟与管道之间的缝隙填砂，用木棍夯实，使砂在管道外壁形成圆形管床。每段接缝应错开，以确保紧密连接，不得有砂粒穿透。管组敷设完毕后，每孔插入一根8ᦇ铁丝，以备穿线。按施工要求分层敷设。铺设顶层后，铺设10cm厚的中砂垫层。最后，通过灌溉进一步沉淀沙子，使沙子和电缆管道形成一个紧密的整体。

1.2.4土方回填

电缆管道敷设后，土方回填以机械回填为主，人工配合。每层15cm厚，压实。回填高度与主要路面标高一致。剩余土用自卸汽车运至弃土场。

2电缆检查井施工技术措施

2.1楼面施工

基坑开挖形成后，厚度8cm的砂砾垫层铺装、夯实、平整。C20混凝土厚度20cm，底板四周预留部分24cm，以便与砌筑砂浆结合，其余部分需打磨。混凝土浇筑后一至两天内，方可砌筑。

Laying of cable duct

Lay 10cm thick medium sand cushion on the concrete bottom plate, lay cable pipe, fill sand in the gap between pipe trench and pipe, and tamp it with wooden stick to make sand form circular pipe bed on the outer wall of pipe. The joints of each section shall be staggered to ensure tight connection and no sand particles shall penetrate. After the pipe group is laid, a piece of 8 ᦇ iron wire shall be inserted into each hole for future threading. Lay the pipe layer by layer according to the construction requirements. After the laying of the top layer, lay the medium sand cushion with the thickness of 10cm. Finally, the sand is further settled by irrigation, so that the sand and cable duct form a compact whole.

1.2.4 earthwork backfilling

After the laying of the cable duct, the earthwork shall be backfilled mainly by machinery with the cooperation of manpower. Each layer is 15cm thick and compacted. The height of backfill is consistent with the elevation of main road surface. The remaining soil is transported to the dumping site by dump truck.

2. Construction technical measures of cable inspection well

2.1 floor construction

After the foundation pit is excavated and formed, the gravel cushion with a thickness of 8cm shall be paved, tamped and leveled. The thickness of C20 concrete is 20cm, and the reserved part around the bottom plate is 24cm, so that it can be combined with the masonry mortar, and the rest parts are required to be polished. The wall shall not be built until one or two days after the concrete is poured.

电缆排管的铺设

   在混凝土底板上平铺10cm厚的中砂垫层，再铺设电缆排管，并在管沟管间空隙填砂，用木棒捣实，使砂在管外壁形成圆弧状管床。排管的铺设，每段的接头要错开布置，保证连接严密，不得有砂粒渗入。管群铺设好后，每孔内穿入8#铁丝一根，以便今后穿线。依照施工要求进行逐层排管的铺设，待最上层排管铺设完后，再铺10cm厚的中砂垫层。最后采用灌水的方法将砂进一步沉降，使砂与电缆排管形成密实的整体。

1.2.4 土方回填

电缆排管铺设完工后，进行土方回填，以机械为主，人工配合。分层回填，每层厚度为15cm，并进行夯实。回填的高度与主体道路路面高程吻合。余土用自卸汽车运至余土弃置场。

2、电缆检查井的施工技术措施

2.1底板施工

    在基坑开挖成型后，先铺碎石垫层8cm厚，夯实整平。再浇筑C20混凝土厚20cm，底板周边预留部分为24cm，以便与砌墙砂浆结合外，其余部分要求收光。在混凝土浇筑完毕一至两天后，方可砌墙。