Huaneng Lancang River Company BDa Hydropower Station Dam Civil Engineering and Metal Structure Installation Project Pre-bidding Procurement Candidate Announcement
Construction Location: cy County, CD City, XZ Autonomous Region
Construction Scale: LCBDa Hydropower Station is located in cy County, XZCD City. The dam site is located in the upstream reach of LCJ at the confluence of Serugou, br Township, CYCounty, which is the fourth stage of the one-reservoir eight-stage development scheme in the hydropower planning of the upstream of LCJ (the river reach in XZ), and is developed in the form of dam. The power station is about 125 km away from cy County, about 226 km away from CD City, and about 175 km away from MK County. The installed capacity is 1500 MW, and the project scale is a first-class large (1) project. The layout of the complex is RCC gravity dam + flood discharge system of the dam body + diversion system of the dam body on the left bank + underground powerhouse on the left bank. The dam is composed of non-overflow dam section, ecological flood discharge hole dam section, overflow dam section, turning dam section and diversion dam section. The maximum dam height is 200 m. The dam body is provided with 3 overflow surface holes and 2 ecological flood discharge holes. The size of the surface hole is 13 m × 23 m (width × height). The size of the opening of the ecological spillway is 5.
The dam is a Grade 1structure with a crest elevation of 3058 m, a maximum dam height of 200 m and a crest length of 438. The spillway structure consists of 3 surface outlets and 2 ecological spillways. The size of the overflow surface hole is 13m × 23m, the maximum discharge is 8977m3/s, and the maximum flow rate is 42. The size of the ecological flood discharge hole is 5.5m × 8m, the maximum discharge is 2923m3/s, and the maximum flow rate is 41. The total amount of the dam concrete is 3.29 million m3, including 2.97 million m3 of roller compacted concrete. The excavation volume of the
chamber rock tunnel is about 38,000 m3, the drilling volume of the curtain grouting bedrock is about 150,000 m, and the concrete drilling volume is 0. The drilling volume of the consolidation grouting bedrock in this bid is about 51,000 m, and the concrete drilling volume is 3.
The slope of the dam foundation and abutment is Class A and Class I. The maximum height of the left abutment slope is about 357 m, of which the maximum height of the slope above the dam crest is about 157 m; the maximum height of the right abutment slope is about 374 m, of which the maximum height of the slope above the dam crest is about 174 m; the temporary slope of the dam foundation is 200 m. The total earthwork excavation of the slope above the existing crest of the left dam abutment is about 930,000 m3, the total earthwork excavation of the slope above the existing crest of the right dam abutment is about 260,000 m3, and the total earthwork excavation of the existing foundation (including the water inlet) is about 3,500,000 m3. The plunge pool slope is Class A, Grade II and Grade I. The maximum height of the left bank slope is about 116m; the maximum height of the right bank slope is 106m; the total amount of earthwork excavation is about 660,000 m3. The natural slope in the junction area of this
bid involves dangerous rock, dangerous rock mass, dangerous rock group, boulder, boulder group, debris flow, and broken loose rock mass slope, which are mainly treated by active protective net, passive protective net, and open-mouth guide net. The active protective net is about 100,800 m2, the passive protective net is about 24,300 m2, and the open-mouth guide net is about 5.
The cofferdam is a year-round earth-rock retaining cofferdam, the maximum height of the upstream cofferdam is 65 m, and the anti-seepage type is geomembrane core wall + riverbed anti-seepage wall + curtain grouting; The maximum height of the downstream cofferdam is 32 m, and the geomembrane core wall + riverbed impervious wall + curtain grouting is adopted as the impervious type. 2.3 Division of
Bid Section: BDa Hydropower Station Dam Civil Engineering and Metal Structure Installation Project of Huaneng Lancang River Company Pre-bidding Procurement Bidding Document Bid Section Package
12.4 Construction Location: cy County
, CD City, XZ Autonomous Region 2. The specific commencement time shall be subject to the instructions of the Supervisor.
2.
The main work contents include (but not limited to):
(1) water flow control during the construction period: river closure, construction and maintenance of upstream and downstream earth-rock cofferdams, and removal of downstream cofferdams; Diversion tunnel blocking gate and hoist installation, gate closing, gate lifting, ecological flow pipe and valve installation during the initial impoundment period, diversion tunnel blocking, etc.; ecological drain valve shaft and connecting tunnel excavation support and later blocking; initial drainage and regular drainage of the whole foundation pit; drainage and rainstorm prevention measures during the construction period in the project area of the contract; dam and upstream and downstream earth-rock cofferdam, etc.; 7 # gully treatment project.
(2) Dam works: excavation and support works of dam abutment and dam foundation on left and right banks; Dam foundation treatment works (including geological defect treatment, consolidation grouting, contact grouting, etc.); seepage control works (including curtain grouting, excavation and support of grouting adit, dam foundation drainage, dam body drainage, etc.); dam concrete works (including dam concrete and reinforcement fabrication and installation, dam body water stop, temperature control, fabrication and installation of steel lining of ecological flood discharge hole, etc.); existing roof and ancillary works (including wave wall, Traffic bridge, gantry crane track beam, concrete of ecological flood discharge hole hoist room, concrete of overflow surface hole oil pump room, existing roof elevator room, drift railing, wharf, cover plate, railing, etc.); special test.
(3) Cushion pond works: excavation, support and concrete works of the slope of the cushion pond; concrete works of the secondary dam; protection works of the downstream river channel.
(4) Treatment works of cataclastic rock mass and dangerous rock mass: treatment works of cataclastic loose rock mass, dangerous rock mass, debris flow ditch, etc.
(5) Traffic engineering: left bank high line 3035 access tunnel, right bank high line 3088 access tunnel.
(6) Cable crane works: excavation, support and foundation concrete pouring of cable crane works on left and right banks, as well as procurement, installation, commissioning, operation, maintenance, overhaul and removal of 2 cable cranes.
(7) Metal structure installation works: emergency gate of overflow surface outlet, service gate of overflow surface outlet, emergency gate of ecological flood discharge outlet, service gate of ecological flood discharge outlet, emergency gate at the inlet of 1 # diversion tunnel, plugging gate at the inlet of 2 # diversion tunnel, emergency valve of ecological flow pipe, service valve of ecological flow pipe, drift barrier and embedded parts, etc. As well as the installation, commissioning, operation and maintenance of related hoists.
(8) Electromechanical embedded parts and grounding works: procurement, embedding, maintenance and other works of drainage pump casing, water level gauge casing, main drainage pipe and accessories of the dam catchment well: electrical, control, protection, communication, etc. Of the dam (including the hoist room of the dam surface outlet and ecological spillway, fish lifter of the dam, gallery in the dam, dam crest, drainage pump room, etc.) Procurement, arrangement and maintenance of equipment management parts such as industrial television, access control system and automatic fire alarm system; procurement, arrangement and maintenance of electrical equipment management parts for 3035 access tunnel of left bank high-speed line and 3088 access tunnel of right bank high-speed line; procurement, installation, testing and maintenance of grounding system materials.
(9) Fish passing facilities: fabrication and installation of fish box lifting, 2928 m horizontal fish passing gallery, foundation dowel bar and other prefabricated parts; installation of fish collection and transportation system and fish lifting system.
(10) Operation and maintenance of waste disposal area and on-site traffic: operation and management of waste disposal area in Shachanggou, operation and management of waste disposal area in Seru Village, operation and maintenance of on-site traffic built by the Employer.
(11) Green construction: design, construction, demolition and recycling of supporting facilities for charging and switching of electric equipment (including civil engineering, main body of charging and switching station and other supporting facilities).
(12) Intelligent construction: purchase, installation, commissioning, operation and maintenance of special equipment for the front command center of intelligent construction; implementation of communication network; application of digital office module; Intelligent construction special system, including concrete construction management system, intelligent rolling system, intelligent temperature control system, intelligent grouting system, intelligent construction management and control of engineering slope, intelligent anchor cable tensioning, intelligent drainage of foundation pit, etc.; intelligent factory, artificial intelligence, GNSS continuous operation reference station system and other applications; digital file transfer, etc.
(13) BIM and GIS technology application: creation and application of BIM model in construction stage, splitting and updating of BIM model in construction stage, collaborative management, collision check of BIM model, construction disclosure according to BIM model, construction according to model, construction organization or construction process simulation, 4D progress simulation, Carry out integrated platform, intelligent construction business system application, digital handover and other work in combination with BIM model; GIS technology application: oblique photography data acquisition, model creation, GIS model application and achievement handover in construction stage.
(14) Safety monitoring: permanent safety monitoring coordination and temporary safety monitoring during construction.
(15) Construction auxiliary facilities: 1 # concrete production system; temporary construction traffic; construction power supply, water supply, air supply, lighting, communication, etc.; dam concrete cooling water plant; comprehensive processing and mechanical repair plant; warehouse and material and equipment storage yard; construction management and living facilities; Special measures for transportation (treatment of cataclastic rock mass and dangerous rock mass); temporary slag collection and retaining facilities in the construction area; RCC belt conveyor transportation system; and other auxiliary construction facilities.
(16) Environmental protection and water and soil conservation: environmental protection engineering measures include various wastewater treatment, construction dust control measures, noise control measures, general solid waste and hazardous solid waste collection and disposal measures, environmental protection toilets, etc.; water and soil conservation engineering measures include topsoil stripping, earthwork collection, intercepting ditches, desilting basins, planting troughs, etc.; Temporary measures include temporary covering of non-woven fabrics and camouflage nets.
(17) Safety facilities and emergency: safety protection and occupational disease protection works related to hazardous and harmful factors.
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