Summary of the construction of Tongzihao avionics

2022-07-23
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Tongzihao avionics project is located on the main stream of Jialing River in wusheng County, Sichuan Province. The dam site is 10 km away from wusheng County. It is a class 14 Power Station planned and developed in the main stream of Jialing River. It is a comprehensive utilization project combining avionics and electricity. From right to left along the dam axis, it is composed of right bank joint dam, ship lock, powerhouse installation room, main and auxiliary powerhouse, 3-hole scouring sluice, 9-hole flood gate, overflow dam, left bank joint dam and other buildings. Three tubular units with a unit capacity of 36 MW and a total installed capacity of 108 MW are installed in the powerhouse. The upstream of the project is close to the completed Dongxiguan Hydropower Station, and the project site has convenient land and water transportation. The upstream of the waterway is 13 km away from the wharf in Yansheng Town, wusheng City, 154 km away from Nanchong City, and the downstream is 167 km away from Chongqing Chaotianmen wharf; A 1.8km clay bound macadam road has been built on the right bank of land transportation, which is connected with Bandung Central Road and can lead to the dam area. On the left bank, there are county-level highways, which are 10km away from wusheng County, 90km away from Nanchong City and 90km away from Guang'an railway station. The main quantities of civil works are: earth rock excavation of 1068000 m3, concrete pouring of 533000 m3, reinforcement fabrication and installation of 1479000 T, earth rock backfilling of 156000 m3 and mortar masonry of 100000 m3. At present, both Airbus and Boeing are interested in graphene. The construction control period of Tongzihao avionics project is: from September 10, 2000 to the end of April 2001, the first phase of upstream and downstream cofferdam filling and cofferdam body seepage prevention construction will be carried out. The constructed diversion open channel will be used to flow. After the foundation pit is bottomed, the concrete pouring of the left bank joint dam, flushing sluice gate, powerhouse and ship lock bottom plate will be carried out. From May 1st, 2001 to the end of October, 2001, the foundation pit overflowed, and the construction of the upper lock head of the ship lock continued. From November 1, 2001 to April 30, 2002, the upstream and downstream Cofferdams of phase I were restored, and the construction of phase I foundation pit was continued. Before the flood season, the scouring sluice reached 239.83 m, the girder on the top of the sluice was installed, the flood control wall of the power house was poured to 232.00 m, and the ship lock was ready for construction in the flood season. From May 1, 2002 to October 30, 2002, the power house and ship lock were ready for construction, and the construction continued. The flood was discharged by the 12 hole scouring sluice and the diversion open channel. From November 1, 2002 to April 30, 2003, the second stage water retaining cofferdam was formed, and the river water flowed through the 12 hole scouring sluice gate, completing the construction of the joint dam and overflow dam section on the left bank. At the end of February2003, the second phase cofferdam was used to retain water, and the first unit generated power. At the beginning of may2003, the second phase cofferdam was removed. 2. Construction in dry season and flood season 2.1 production auxiliary system 2.1.1 equipment transfer and transportation the vast majority of materials and equipment required for Tongzihao construction site are transferred from Hongya Chengdong power station, Baozhusi power station and Mahui power station, with many transfer lines, long haul distance and large transportation volume. According to the overall deployment of the construction organization design and the requirements of the construction period, the tensile force is measured from 20; From October 7, 200 to the end of January of the following year, it completed the transportation task of 4600 tons for 580 trains; At the same time, the screening system (600t/h, 22 belt conveyors about 670m) and the mixing system (from Fuchunjiang 3 × Transportation and installation tasks of 1.5 m3 mixing plant, hzf1500 mixing plant, 2 sets of 50 mixing plants and 6 belt conveyors), 1 set of WK-4 crawler crane, 2 sets of mq600 gantry cranes and 2 sets of DMQ540 gantry cranes, as well as transportation and installation of auxiliary system equipment such as three major plants, machine repair, automobile repair and laboratory. The screening system was officially put into operation at the end of November 2000, and the mixing system was put into operation on schedule at the end of December 2000. 2.1.2 sand and gravel aggregate system the project adopts zhaojianxi sand and gravel, the mayor of Hejin City, which has rich material sources and good gravel quality, while the sand material has low fineness modulus and high silt content, which is ultra-fine sand. Through comparison, Majiatan and guandaozui stockyards are selected as the main stockyards. In addition, the sand and gravel waste materials during the foundation pit excavation can also select the useful part as the raw materials. The total amount of concrete on the right bank for phase I construction is 443436 m3, and the maximum grading is grade IV. According to the arrangement of construction schedule, the maximum strength of concrete pouring on the right bank is 41000 m3/month. Considering that the uneven production of sand and gravel aggregate processing system must have a certain margin, the production capacity of finished aggregate of the preparation system is 340 t/h. 2.1.3 concrete mixing system according to the requirements of construction stages and concrete pouring strength, the concrete mixing system is arranged on the left and right banks, and the right bank is constructed first for phase I project. According to the general layout and strength requirements, the mixing system on the right bank is arranged in zone m on the right bank, covering an area of about 10000 m2. Phase I project adopts the mixing system on the right bank for mixing. The total concrete volume is 443436 m3, and the maximum monthly concrete pouring volume is 41000 m3. The production capacity of the mixing system is required to be 118.4 m3/h, with 3 × One 1.5 m3 mixing plant (with a production capacity of 100 m3/h), one hz50 mixing plant (with a production capacity of 50 m3/h) and one hz90 mixing plant (with a production capacity of 90m3/h), so the actual production capacity of the mixing system is 160 m3/h. 2.2 phase I dry diversion and closure construction phase I (dry season and dry season) diversion works of Tongzihao avionics project are: water retaining by upstream and downstream cofferdams, longitudinal cofferdams at small and medium dams, and diversion by open diversion channels. The water retaining standard of phase I cofferdam is the 10-year flood in April. Its diversion design flow is 2200m3/s, the upstream and downstream water levels are 217.74 m and 214.8 m respectively, the cofferdam crest elevation is proposed to be 218.5 m and 215.3 m, the total width of the cofferdam crest is 10 m, the maximum weir height is 8 m and 5.3 m respectively, and the weir crest axis length is 375 m and 286 m respectively. According to the overall construction schedule, the closure time is november6,2000, so 11

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