Project overview:
1- 1, basic information of the project:
This project is the trunk project of urban sewage interception of Wulihe River in XX/ day sewage treatment plant of XX Sewage Treatment Co., Ltd.
1- 1. 1. Design unit: china municipal engineering Northeast Design and Research Institute.
1- 1.2. The main work of this construction section is: installation and construction of sewage pipes.
1- 1.3. Basic overview along the construction section:
This construction section is located at the junction of XX District and XX District, starting from the north side of the bridgehead of XX Chemical Plant, passing through the middle and lower reaches of Wulihe River, and ending at XX Sewage Treatment Plant, with a total length of about 1 1.85km. The whole construction section * * pipeline is planned to cross 5 highway bridges, 2 highways 1 and 2 railways (a during the whole construction period, The pipeline * * * crosses the existing riverbed at six places (P59-60, PZ 13-P83, PZ 15-P90, P97-99, P 105- 107, P203-2003). The pipe section laid in the mud pit is about 1768 linear meter. It is estimated that there are as many as 16 ~ 20 original underground pipelines crossing along the line, including water supply pipelines, industrial sewage pipelines, municipal sewage pipelines, oil pipelines, natural gas pipelines, urban sewage pipelines, underground optical cables, underground cables and communication cables. Different materials, different diameters and uneven elevation at the bottom of the pipeline make it difficult for the pipeline to cross.
1- 1-3. 1, the pipeline (0+000 ~ 3+007.4 17) from natural gas bridge head to Xinhua Street is laid in the north riverbed, and there are masonry dams on both sides of the riverbed, with a height of 3.0~4.5m. Dn 800 mm (p1-p34) ~ dn1000 mm (p34-p59) prestressed reinforced concrete pipe, socket rubber ring interface, 120 concrete pipe foundation, average excavation depth of 3.5m [minimum excavation depth of 2.64m, maximum excavation depth of 6.4m(65440).
1- 1-3.2, and the pipeline from C to marshalling station section of refinery plant (3+099.020 ~ 4+520.899) are laid in the river bank on the Henan side, crossing the west of J, K to L railway bridge, and the pipeline P60~P64 passes within Y, and the pipeline P64~P90 is in the water. Moreover, buildings and iron fences (P70~P90, oil refinery marshalling station) cannot be close to the river bank. DN 1000(P60-P90) prestressed reinforced concrete pipe, socket rubber ring interface, 120 concrete pipe foundation, with an average excavation depth of 2.68m [minimum excavation depth 1.65438+-0.989m, maximum excavation depth of 5.45m, (.
1- 1-3.3, the pipeline (4+640.899 ~ 5+572.887) from the south of XX Railway to the southeast of Batun Village is laid in the river channel on the side of Henan Province and on the wasteland dug by the floodplain. There are villagers' wasteland, tall crops in the field, and houses that have not been moved. Dn1000 mm (p92-p11) prestressed reinforced concrete pipe, socket rubber ring interface, 120 concrete pipe foundation (sand should be changed in some basements), with an average excavation depth of 3.693m [minimum excavation depth/kloc]
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