The whole line adopts the standard construction of two-way four-lane expressway, with a design speed of 80km/h and a subgrade width of 24.5m m. ..
This tender is bid LM2, with the starting and ending pile numbers of K44+800~K78+253 and the route length of 33.627 kilometers.
2. Main economic and technical indicators
2. 1 Highway grade: four-lane expressway.
2.2 design driving speed: the design speed is 80 km/h.
2.3 subgrade width: integral 24.5m, separated12.25m.
2.4 Vehicle load grade: Highway -I, the design standard axle load is expressed as BZZ- 100KN, and the single axle load of two wheelsets is taken as the standard axle load.
2.5 Tunnel construction clearance: clear width 2× 8.75m, clear height 5.00m.
2.6 Pavement structure:
The main line is 4cm modified asphalt mastic macadam SMA- 13 upper layer +6cm medium-grained modified asphalt concrete AC-20C middle layer +6cm medium-grained asphalt concrete AC-20C lower layer +20cm cement-stabilized macadam base layer +30cm cement-stabilized macadam subbase layer, with 0.6cm slurry seal on the top surface of the base layer, and 15cm graded macadam cushion under the whole subbase layer.
The ramp is 4cm modified asphalt mastic macadam SMA- 13 upper layer +6cm medium-grained modified asphalt concrete AC-20C lower layer +20cm cement stabilized macadam base layer +30cm cement stabilized macadam subbase layer, with 0.6cm slurry seal on the top surface of the base layer, and 15cm graded macadam cushion layer under the whole subbase layer;
The bridge deck pavement adopts 4cm modified asphalt mastic macadam SMA- 13 upper layer +5cm medium-grained modified asphalt concrete AC-20C lower layer+1cm modified asphalt sand sealing leveling layer+hot modified asphalt sealing layer+10cm reinforced concrete pavement layer;
The 400m section of extra-long tunnel (L﹥ 1000m) adopts 4cm modified asphalt mastic macadam SMA- 13 upper layer +6cm medium asphalt concrete AC-20C+ tunnel waterproof bonding layer +26cm cement concrete base layer +20cmC20 cement concrete leveling layer; The extra-long tunnel body adopts 28cm cement concrete surface layer and +20cm cement concrete leveling layer;
Ramp toll station adopts 28cm cement concrete pavement +0.6cm slurry seal+16cm cement stabilized macadam base+16cm cement stabilized macadam base;
3. Meteorological and hydrological conditions
Rongxian County, Zigong City, where this project passes, has a subtropical humid monsoon climate, with four distinct seasons, no severe cold in winter, no intense heat in summer, long frost-free period, abundant rainfall and sufficient heat, so it is suitable for farming in four seasons. The annual average temperature is 17.8℃, the hottest month is August, the average maximum temperature is 3 1.3℃, and the highest temperature in Leng Yue is 65438+. The average annual rainfall is 947.4 mm, with precipitation mostly concentrated in the flood season and little rain in winter.
The climate division of asphalt pavement is: 1-4- 1 hot in summer and wet in winter.
The route passes through Minjiang River Basin, and the main river is Xushui River.
4. Construction conditions such as transportation, electricity and communication.
4. 1 Transportation: The transportation in the area is relatively developed, and a comprehensive transportation system of railway, highway and water transportation has been formed from Leshan. The main materials are transported to the construction area through S305 provincial highway.
4.2 Power and communication: There are high-voltage transmission lines near the line, and the villages along the line have been telephoned. The construction power and communication can be solved through local contact.
4.3 Construction water: There are abundant water resources along the project, so the construction water can be taken nearby, and the domestic water needs to be purified before drinking.
5. Road building materials
The asphalt materials in this contract shall be uniformly purchased by the owner, and the cement shall be qualified materials that meet the requirements of the bidding documents and approved by the supervision engineer. The coarse aggregate of asphalt pavement adopts basalt yard in Jiuli Town of Emei Mountain or Shawan District of Leshan City, and the fine aggregate adopts machine-made sand specially processed with pebbles in Leshan High-tech Zone yard. The coarse aggregate used in the middle and lower layers is crushed gravel with the particle size larger than 8cm in the material yard of Leshan High-tech Zone, and the fine aggregate is machine-made sand made of pebbles and stone chips formed during the processing of coarse aggregate in Leshan High-tech Zone. The coarse and fine aggregates of base, subbase and cement concrete are crushed gravel, stone chips and machine-made sand made of pebbles with a particle size greater than 5cm. It mainly comes from the stockyard near Leshan High-tech Zone, and the materials are mainly transported by local roads and cars.
The top layer of SMA- 13 asphalt concrete adopts finished SBS modified asphalt, and its matrix asphalt is 90 # A grade asphalt; The AC-20C modified asphalt concrete in the middle layer adopts rock asphalt modified asphalt, and its matrix asphalt is No.70 Grade A road petroleum asphalt; The AC-20C asphalt concrete in the lower layer adopts ordinary No.70 Grade A road petroleum asphalt; Slurry seal coat adopts slow cracking cationic emulsified asphalt.
6. Number of major projects
The main works in this contract section are 4cm thick SBS modified asphalt mastic macadam SMA- 13 with an upper layer of 734504m2, 6cm thick medium-grained modified asphalt concrete AC-20C with an intermediate layer of 683864m2, 20cm thick medium-grained modified asphalt concrete AC-20C with a lower layer of 585453m2, and cement stabilized macadam base layer of 7 17085m2. 30cm thick cement stabilized macadam subbase 75333 1m2, 15cm thick graded macadam cushion 67 1696m2, prime coat oil 728527m2, adhesive coat oil 2099767m2, slurry seal coat 728527m2, corresponding quantities of bridge deck pavement and tunnel entrance, including drainage works and communication pipeline works of this bid section. I probably found these materials, you can refer to them.