The gate crest elevation is to be d

The gate crest elevation is to be determined according to the two circumstances of water retaining and releasing. According to the calculation results, the controlling conditions of the dam crest elevation are to take the highest impounding level U/S of the gate while retaining water as the controlling conditions: Simultaneously, considering that the top of the flood-release gate is arranged with dam crest access bridge, the bridge height is designed as 0.8m, and the bridge bottom elevation is to be higher than the FSL by at least 0.3m. Summarizing the calculation results, it is to finally take the dam crest as El. 324.50m.
3. Calculation of flood-release capacity
(1) Release Calculations
The check flood discharge of the project (P=1%) is 1,500m3/s, and the design flood discharge (P=5%) is 955m3/s, to be jointly release with flood-release gate and desilting gate. According to preliminarily selected 5 flood-release gates and 1 desilting gate, the gate chamber is of open style. The net width of the flood-release gate opening is 8.0m, and the opening height is 8.0m; The weir crest is at El. 316.50.00m, the thickness of the middle piers is 2.5 m, and the thickness of the side piers is 1.5m. the release capacity is to be calculated by the following formula.
Through hydraulic calculations when the flood release/desilting gate releases the flood discharge of 1,500m3/s, the U/S water level is at El. 323.90m, and while releasing the designed flood discharge of 955m3/s, the U/S water level is El.322.00m.
4. Calculations of Antiskid Stability and Base stree
1) Calculated working conditions and load combinations
The calculated working conditions and load combinations may be referred to Table 1.6-6.
Calculated working conditions and laod combination
Load combination
Basic combination
Special combination
Calculated working conditions
As-built working conditions
Normal retaining
Maintenance conditions
Check flood
Seismic working condition
Dead weight
Water weight
Hydrostatic pressure
Uplift pressure
Earth pressure
Silt pressure
Wind pressure
Wave pressure
Seismic force
Other

The gate crest elevation is to be determined according to the two circumstances of water retaining and releasing. According to the calculation results, the controlling conditions of the dam crest elevation are to take the highest impounding level U/S of the gate while retaining water as the controlling conditions: Simultaneously, considering that the top of the flood-release gate is arranged with dam crest access bridge, the bridge height is designed as 0.8m, and the bridge bottom elevation is to be higher than the FSL by at least 0.3m. Summarizing the calculation results, it is to finally take the dam crest as El. 324.50m.
3. Calculation of flood-release capacity
(1) Release Calculations
The check flood discharge of the project (P=1%) is 1,500m3/s, and the design flood discharge (P=5%) is 955m3/s, to be jointly release with flood-release gate and desilting gate. According to preliminarily selected 5 flood-release gates and 1 desilting gate, the gate chamber is of open style. The net width of the flood-release gate opening is 8.0m, and the opening height is 8.0m; The weir crest is at El. 316.50.00m, the thickness of the middle piers is 2.5 m, and the thickness of the side piers is 1.5m. the release capacity is to be calculated by the following formula.
 Through hydraulic calculations when the flood release/desilting gate releases the flood discharge of 1,500m3/s, the U/S water level is at El. 323.90m, and while releasing the designed flood discharge of 955m3/s, the U/S water level is El.322.00m.
4. Calculations of Antiskid Stability and Base stree
1) Calculated working conditions and load combinations
The calculated working conditions and load combinations may be referred to Table 1.6-6.
Calculated working conditions and laod combination 
Load combination
Basic combination
Special combination
Calculated working conditions
As-built working conditions
Normal retaining
Maintenance conditions
Check flood
Seismic working condition 
Dead weight 
Water weight 
Hydrostatic pressure 
Uplift pressure 
Earth pressure 
Silt pressure 
Wind pressure 
Wave pressure
Seismic force
Other

0/5000

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ການຍົກຍອດປະຕູແມ່ນໄດ້ຮັບການກໍານົດໂດຍອີງຕາມການທັງສອງສະຖານະການຂອງການຮັກສານ້ໍາແລະປ່ອຍ. ອີງຕາມຜົນການຄິດໄລ່, ການຄວບຄຸມສະພາບການຂອງສູງ crest ສ້າງເຂື່ອນໄຟຟ້າແມ່ນຈະໃຊ້ເວລາລະດັບ Impounds ທີ່ສູງທີ່ສຸດ U / S ຂອງປະຕູໃນຂະນະທີ່ການຮັກສານ້ໍາຕາມສະພາວະຄວບຄຸມໄດ້: ພ້ອມດຽວກັນ, ພິຈາລະນາທີ່ທາງເທີງຂອງປະຕູນ້ໍາປ່ອຍ, ໄດ້ຖືກຈັດລຽງຕາມດ້ວຍ ຂົວເຂົ້າ crest ສ້າງເຂື່ອນໄຟຟ້າ, ລະດັບຄວາມສູງຂົວໄດ້ຖືກອອກແບບເປັນ 0.8m, ແລະການຍົກລະດັບທາງລຸ່ມຂົວແມ່ນຈະສູງກ່ວາ FSL ໂດຍ 0.3m ຢ່າງຫນ້ອຍ. ສະຫຼຸບຜົນການຄິດໄລ່ໄດ້, ມັນເປັນສຸດທ້າຍໃຊ້ເວ crest ສ້າງເຂື່ອນໄຟຟ້າໄດ້ເປັນ El. 324.50m.
3. ການຄິດໄລ່ຂອງຄວາມອາດສາມາດນ້ໍາປ່ອຍ,
(1) ການຄິດໄລ່ອອກ
ໄຫຼນ້ໍາການກວດສອບຈາກໂຄງການ (P = 1%) ແມ່ນ 1,500m3 / s, ແລະການລົງຂາວນ້ໍາການອອກແບບ (P = 5%) ແມ່ນ 955m3 / s, ເພື່ອຈະໄດ້ຮ່ວມກັນປ່ອຍ ມີປະຕູຮົ້ວນ້ໍາປ່ອຍ, ແລະປະຕູຮົ້ວ desilting. ອີງຕາມການຄັດເລືອກ preliminarily 5 ປະຕູນ້ໍາປ່ອຍ, ແລະປະຕູຮົ້ວ desilting 1, ສະພາປະຕູໄດ້ແມ່ນຂອງແບບເປີດ. ຄວາມກວ້າງສຸດທິຂອງການເປີດປະຕູນ້ໍາປ່ອຍ, ເປັນ 8.0m, ແລະລະດັບຄວາມສູງເປີດເປັນ 8.0m; ຍອດ weir ແມ່ນຢູ່ El. 316.50.00m, ຄວາມຫນາຂອງ piers ກາງແມ່ນ 25 m, ແລະຄວາມຫນາຂອງທ່າຂ້າງແມ່ນແລ້ວ 15m. ຄວາມອາດສາມາດປ່ອຍແມ່ນຈະຖືກຄິດໄລ່ໂດຍສູດດັ່ງຕໍ່ໄປນີ້.
ໂດຍຜ່ານການຄິດໄລ່ບົບໄຮໂດຼລິກໃນເວລາທີ່ປະຕູປ່ອຍນ້ໍາ / desilting ປ່ອຍໄຫຼນ້ໍາຂອງ 1,500m3 / s, ລະດັບນ້ໍາ U / S ແມ່ນຢູ່ El. 323.90m, ແລະໃນຂະນະທີ່ປ່ອຍໄຫຼນ້ໍາການອອກແບບຂອງ 955m3 / s, ລະດັບນ້ໍາ U / S ແມ່ນ El.322.00m.
4. ການຄິດໄລ່ຂອງ Antiskid ສະຖຽນລະພາບແລະຖານ stree
1) ການຄິດໄລ່ສະພາບແລະການປະສົມຫນັກທີ່
ໃນສະພາບການເຮັດວຽກແລະການຄິດໄລ່ການປະສົມການໂຫຼດອາດຈະຫມາຍເຖິງຕາຕະລາງ 1.6-6.
ການຄິດໄລ່ເຮັດວຽກເງື່ອນໄຂແລະປະສົມປະສານ laod
ປະສົມປະສານການໂຫຼດ
ປະສົມປະສານພື້ນຖານ
ປະສົມປະສານພິເສດ
ການຄິດໄລ່ພາບການເຮັດວຽກ
ໃນຖານະເປັນການກໍ່ສ້າງທີ່ເຮັດວຽກ ສະພາບ
ປົກກະຕິຮັກສາ
ສະພາບການບໍາລຸງຮັກສາ
ກວດສອບການນ້ໍາຖ້ວມ
ແຜ່ນດິນໄຫວເຮັດວຽກສະພາບ
ນ້ໍາຕາຍ
ນ້ໍານ້ໍາ
ຄວາມກົດດັນດັນ
ເຊີດຊູຄວາມກົດດັນ
ຄວາມກົດດັນໃນທົ່ວໂລກ
ຄວາມດັນ Silt
ຄວາມກົດດັນລົມ
ຄວາມກົດດັນຄື້ນ
ແຮງແຜ່ນດິນໄຫວ
ອື່ນໆ

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