Project overview:
1-1, the basic situation of the project:
This project is xxx city sewage treatment limited liability company xxx/day sewage treatment plant wuli river urban sewage interceptor trunk project.
1-1.1, design unit: China municipal engineering northeast design and research institute.
1-1.2, the construction section of the main project content: sewage pipe installation construction.
1-1.3, the construction section along the basic outline:
The construction section is located in xxx district to xxx district boundary, from xxx chemical plant bridge north, through the middle and lower reaches of the Wuli River to the xxx sewage treatment plant stops, the total length of about 11.85km. the whole section of the pipeline pipeline*** counted across five highway bridges, a highway, two railroad lines (A. B. C. D. E. F, G, H). The whole construction section pipeline*** crosses 5 highway bridges, 1 highway, 2 railway lines (A. B. C. D. E. F., G. H.). The entire construction section of the pipeline *** counts across the existing riverbed in six places (P59-60, PZ13-P83, PZ15-P90, P97-99, P105-107, P203-204), *** counting 601.1 linear meters. The pipe sections laid in the water along the riverbed are P1-P59, P60-82, about 3350 linear meters. The pipe section laid in the mud pond is about 1,768 linear meters. Along the line through the original underground pipeline is expected to be as many as 16 to 20, including water supply lines, industrial sewage lines, municipal sewage lines, oil pipelines, natural gas pipelines, urban sewage pipelines, underground fiber optic cables, underground cables, communication cables, and so on, the pipe material material is not the same, the diameter of the pipe, the bottom of the pipe elevation varies for the pipeline through the increase in a number of difficulties.
1-1-3.1, from the natural gas bridge to Xinhua Street C section of the pipeline (0 + 000 ~ 3 + 007.417) in the north side of the riverbed, the riverbed on both sides of the stone masonry burlap wall, height between 3.0 ~ 4.5m, there are stone masonry dams across the water, the riverbed, there are many industrial and municipal sewage pipelines. 90% of the pipeline trench section of the construction in the mud, the water, there is no road, and even more can not be by the bank burlap wall. There is no access road, much less direct access from the banked masonry dam wall into the riverbed. On the south side of the bridge crossing the riverbed (DN700 cast iron ductile pipe), DN800mm (P1-P34) ~ DN1000mm (P34-P59) pre-stressed reinforced concrete pipe, socketed rubber ring interface, 120 ° concrete pipeline foundation, the average digging depth of 3.5m [minimum digging depth of 2.64m, the maximum depth of excavation of 6.4m (sand replacement at the bottom of the base of the 1m deep)], the average depth of burial of 1.5m (minimum depth of burial of 0.54m). Minimum depth 0.54m).
1-1-3.2, from C to the refinery grouping station section of the pipeline (3 + 099.020 ~ 4 + 520.899) in the south side of the river bank on the south side of the river laying, through the J, K to the west of the railroad bridge in L, P60 ~ P64 pipe section in the Y through the water and silt in the P64 ~ P90 pipe section in the water and silt in the construction of the laying, the bed of the river is no access road, the bank also has no access roads, the bed of the river is over the weeds people, there are stone masonry woolen stone dam wall on both banks, the height is between 3.0 and 4.5m. And there are house buildings and iron fences (P70~P90, refinery grouping station) can't get close to the river bank.DN1000 (P60-P90) pre-stressed reinforced concrete pipe, socketed rubber ring interface, 120° concrete pipeline foundation, the average depth of excavation is 3.68m [the minimum depth of excavation is 1.199m, and the maximum depth of excavation is 5.45m (the depth of sand exchange at the bottom of the substrate is 1m)], and the average depth of burial is 2.68m (the minimum depth of burial is -0.989m), and the average depth of burial is 2.68m (the minimum depth of burial is -0.989m). depth of burial -0.989m). (Opposite to J of xxx neighborhood).
1-1-3.3, by × × × railroad south to high put Tun village southeast section of the pipeline (4 + 640.899 ~ 5 + 572.887), in the south side of the river and the river bank in the south side of the river channel and the river bank digging wasteland laying, there are villagers of the open land, dada high crops, relocation and demolition of the site, there are not relocated residential, Shen iron bridge and tunnel company construction site and the site of the temporary housing, no access to the road. DN1000mm (P92-P111) pre-stressed reinforced concrete pipe, socket rubber ring interface, 120 ° concrete pipeline foundation (local sub-base should be sand replacement treatment), the average depth of excavation of 3.693m [minimum depth of excavation of 1.032m, the maximum depth of excavation of 6.452m, (the sub-base of sand replacement of 1m deep)], the average depth of burial of 1.51m (the minimum depth of burial of -0.808m).
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