| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| NB/T 10344-2019 | English | RFQ |
ASK
|
3 days [Need to translate]
|
(Code for design of water and soil conservation in hydropower projects)
| Valid |
NB/T 10344-2019
|
PDF similar to NB/T 10344-2019
Basic data | Standard ID | NB/T 10344-2019 (NB/T10344-2019) | | Description (Translated English) | (Code for design of water and soil conservation in hydropower projects) | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | P59 | | Word Count Estimation | 146,189 | | Date of Issue | 2019-12-30 | | Date of Implementation | 2020-07-01 | | Issuing agency(ies) | National Energy Administration | NB/T 10344-2019: (Code for design of water and soil conservation in hydropower projects)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Code for design of water and soil conservation in hydropower projects)
ICS 27.140
NB P 59
Energy Industry Standards of the People's Republic of China
Design Code for Water and Soil Conservation of Hydropower Projects
Code for Design of Soil and Water Conservation for Hydropower Projects
Released on.2019-12-30 Implemented on 2020-07-01
Issued by the National Energy Administration
1 General
1.0.1 In order to standardize the design of water and soil conservation of hydropower projects, control the design quality, prevent soil erosion and its hazards
This standard is formulated to restore and improve the ecological environment and ensure the safety of water and soil conservation projects.
1.0.2 This code is applicable to water and soil conservation design of hydropower projects.
1.0.3 The water and soil conservation design of hydropower projects should follow local conditions, comprehensive management, safety and reliability, and focus on efficiency.
Based on the principle of benefit, carry out corresponding investigations, surveys, tests and special studies, and carry out the design of various measures.
1.0.4 The water and soil conservation design of hydropower projects shall not only comply with this code, but also comply with the current relevant national standards.
Quasi-provisions.
5 Design of waste slag yard
5.1 General provisions
5.1.1 The design of the spoil yard shall meet the following requirements.
1 The design of the waste slag yard should be carried out simultaneously with the design of the main project, and adhere to local conditions, safety and reliability,
Principles of economic rationality, combination of prevention and treatment, and process control.
2 The site selection of the waste slag yard shall be coordinated and synchronized with the design of the main project, so as to meet the requirements of water and soil conservation.
At the same time, it is technically feasible.
3 The stacking of waste slag yard shall be based on topographic and geological conditions, physical and mechanical parameters of waste slag, meteorological and hydrological regulations
To determine the stacking factors of parts, etc., and meet the stability of the waste slag field.
4 On the basis of the stability of the slag body, block and
Design of engineering protection measures such as slope protection, flood control and drainage.
5.1.2 The basic information and results required for the design of the waste slag yard shall mainly include the following contents.
1 Topographic surveying and mapping results.
2 Topographic features, meteorological conditions, hydrological conditions, seismic fortification intensity, and environmental status quo.
3 Engineering geology and hydrogeological data.
4 The source of slag material, the composition of the slag, the amount of slag, the recovery volume, the physical and mechanical parameters of the slag.
5 The flood flow, flood level, and flow velocity corresponding to the fortification standards of the waste slag yard;
The characteristic water level of the reservoir during the travel period; rainfall, rainfall intensity, rainfall process; flood discharge atomization range.
6 The general construction layout plan, the layout plan and section plan of the pivot building.
5.1.3 The waste slag yard shall carry out corresponding engineering geological and hydrogeological surveys according to different design stages.
The inspection content should meet the following requirements.
1 In the design stage of the feasibility study, the natural geographical features, meteorological features, topography and landforms of the site should be investigated
Characteristics, hydrogeological characteristics, natural disaster characteristics, foundation soil characteristics, and weak foundation soil characteristics of the survey site
Distribution range and characteristics, groundwater, surface water system characteristics, recharge and runoff characteristics, the distribution of soil in the site area should be ascertained.
The suitability of the site should be evaluated on the layer, gradation and physical and mechanical properties.
2 The geological data and conclusions of the feasibility study stage should be reviewed during the bidding design stage, and the remaining
Provide geological information for improving and optimizing the design and preparing bidding design documents.
All areas with major influences.
5.3.2 The site selection of the waste slag yard shall comply with the current industry standard "Technical Specifications for Water and Soil Conservation Plans for Hydropower Construction Projects"
DL/T 5419, "Code for Design of Hydropower Project Construction Organization" DL/T 5397 and "General Layout of Hydropower Project Construction
Relevant regulations of NB/T 35120 in the Design Code for Home Appliances.
5.3.3 The scale accuracy of the topographic map of the waste slag site selection shall not be less than 1.5,000.
5.3.4 The site selection of waste slag yard shall follow the following principles.
1 The location of the waste slag yard should be compatible with the traffic and the source of slag materials in the site. The transfer stock yard should facilitate the recovery of slag materials,
Avoid or reduce reverse transportation.
2 The spoil yard should be close to the ravine, hillside, wasteland, river beach and other sections of the excavation area, and should not occupy or occupy less
Occupy cultivated land and woodland.
3 Set up a spoil yard in an unbuilt reservoir, which should be selected below the dead water level, and it is indeed necessary to discard it in the water level variation area.
If it is scum, it should be fully demonstrated.
4 When arranging the spoil yard using the river beach, it shall meet the requirements of river management and flood control
Take measures to ensure the safety of flood discharge.
5 The waste slag yard should not be set up in the mud-rock flow ditch. If it is really necessary, special demonstration should be carried out, and the necessary
The prevention and control measures ensure the safety and stability of the waste slag field.
6 The spoil yard should not be set up in the area where the groundwater is exposed. If it cannot be avoided, the groundwater should be fully considered.
Adversely affect the stability of the spoil yard, and take necessary preventive measures.
7 The foundation bearing capacity of the spoil yard shall meet the requirements for slag dumping, and there shall be no weak structural surface at the bottom of the slag yard.
5.3.5 The waste slag site should be compared and selected with multiple options, and the site selection demonstration should be carried out. The comparison and selection of site options should include
The following.
1 Analysis of restrictive factors.
2 Hydrological conditions of the site.
3 Topography, geomorphology, engineering geology and hydrogeological conditions of the site.
4 Type and area of land occupation, number of resettlement persons involved, number of special facilities and their investment.
5 Waste slag yard capacity, transportation distance, slag transportation road, protective measures and investment.
6 Damage to the number of water and soil conservation facilities and possible water and soil erosion hazards.
7 Safety protection distance.
8 Slag recovery and utilization conditions.
Relevant regulations in "Engineering Design Code" GB 51018.
5.4.6 The final platform width of each step of the multi-step waste slag yard shall be determined according to the comprehensive utilization and protection of the waste slag yard in the later period.
The minimum width should not be less than 2m. Every 30m～40m of the soil slope should be set with a width of more than 5m.
Platform, a wide platform with a width of more than 5m should be set every 40m～50m of mixed gravel soil or gravel soil.
5.4.7 The natural angle of repose stacked in the waste slag yard shall comply with the current national standard "Design Code for Soil and Water Conservation Engineering"
The relevant regulations of GB 51018.
5.4.8 The comprehensive slope shall be based on the physical and mechanical properties of the waste slag, the type of construction machinery and equipment, the topography, and the construction site.
Conditions such as quality, meteorology and hydrology are determined. The comprehensive slope of the waste slag yard stacked with multiple steps should be less than that of the slag yard stack
The natural angle of repose is finally determined after stability checking.
5.4.9 When carrying out program demonstration at the abandoned slag yard, the determination of stacking elements should include the following.
1 Conclusion of the site selection of the waste slag field, the topography, landform, engineering geology, hydrology, vegetation
Was waiting for environmental conditions.
2 Source, composition and total amount of discarded slag.
3 Physical and mechanical parameters of waste slag.
4 Design of waste slag stacking scheme.
5 Designed slag volume, land area, maximum slag height and step height, platform width, natural safety
Stacking factors such as angle of interest and comprehensive slope.
5.5 Safety protection
5.5.1 The safety protection distance of the spoil yard shall be determined according to the following factors.
1 Original topography and geological conditions of engineering.
2 The physical and mechanical properties of the waste slag, the stacking height and the slope of the side slope.
3 The overall stability of the waste slag yard.
4 The nature of the object of protection.
5 The relative height difference between the protection object and the waste slag yard.
6 Meteorological conditions.
7 Protective engineering measures taken in the spoil yard.
5.5.2 The waste slag is stacked with waste slag that is stable overall, has good drainage, and has good engineering and hydrogeological conditions
2 The design flood level of the cofferdam during the construction period and its frequent drop.
3 The water level on the water side of the waste slag yard has dropped extremely.
4 Check the flood level and its drop.
5 Slope saturation and corresponding groundwater level changes due to rainfall, water release, rain and fog, and other reasons
化.
6 Under normal operating conditions, the slag body drainage fails.
5.6.6 Extraordinary operating conditions II should be the operating conditions that encounter earthquakes of degree Ⅶ and above under normal operating conditions.
5.6.7 If there are multiple working conditions under a certain operating condition, the most dangerous working conditions should be analyzed and selected first. for
Under the same operating conditions, the stability safety factor of the most dangerous working conditions should be calculated. When the most dangerous conditions are difficult to determine
At the same time, stability calculations should be performed separately for different working conditions under the same operating conditions. For the spoil yard near the water side,
The unfavorable water level should be obtained through trial calculations.
5.6.8 The basic calculation method of anti-sliding stability should be the limit equilibrium method.
5.6.9 When the limit equilibrium method is used to calculate the anti-sliding stability of the spoil ground, the anti-sliding stability calculation can be based on the sliding surface
The shape is carried out in accordance with the relevant provisions in Appendix A of this code. When the sliding surface is in a circular arc shape, it is advisable to use simplified Bishaw
The common method or Morganston-Pryce method is used to calculate the anti-sliding stability; when the sliding surface is non-circular, it should be used
Morganston-Price method is used to calculate the anti-sliding stability.
5.6.10 When the simplified Bishop method and Morganston-Price method are used for calculation, the spoil yard is stable and safe against sliding
The coefficient shall not be less than the provisions in Table 5.6.10.
Table 5.6.10 Anti-sliding stability safety factor of spoil yard
Application situation
Waste slag yard level
1 2 3 4, 5
Normal operating conditions 1.35 1.30 1.25 1.20
Unusual operating conditions I 1.25 1.20 1.15 1.10
Unusual operating conditions Ⅱ 1.15 1.10 1.10 1.05
5.6.11 Waste slag is used to fill pits and ponds. After filling pits and ponds, the top platform is not higher than the surrounding ground elevation.
The stability calculation of the spoil yard may not be performed.
5.6.12 For the slag field where the amount of spoiled slag is greater than 500,000 m³ or the slag pile height is greater than 20m, stability analysis special
The argumentation should meet the following requirements.
1 Analyze and evaluate the structural stability of the spoil yard.
2 In terms of topography and geomorphology, stratum lithology, physical and geological phenomena, hydrogeological conditions, etc., evaluate the waste
The basic geological conditions of the slag yard.
3 Analyze and determine the level of waste slag yard and calculation standards.
4 Determine the calculation parameters. The physical and mechanical parameters should be obtained through experiments. The physical force of the abandoned slag before the abandoned slag
The academic parameters can be determined by analogy analysis of the slag composition.
5 Analyze and determine calculation conditions.
6 Select the calculation method.
7 Determine the stability analysis section and calculation content.
8 Put forward the local and overall stability analysis conclusions of the waste slag yard.
5.7 Basic treatment of waste slag yard
5.7.1 Small broken zone and shallow weak interlayer should be excavated and treated.
5.7.2 For soil foundation slopes with poor stability, the original slopes should be trimmed into steps.
5.7.3 For the soft and moist soil, it is advisable to dig a trench to dry the base before piling up the slag, pour a block of crushed stone as a cushion or put a large block of
The stones are stacked at the bottom.
5.7.4 The spoil yard with good surface vegetation should remove the surface vegetation before spoiling.
5.8 General arrangement of protective measures for spoil yard
5.8.1 The waste slag yard shall be based on comprehensive consideration of the type of slag yard, engineering safety, construction conditions, material sources, etc.
Based on the selection and arrangement of water and soil erosion prevention and control measures.
5.8.2 The overall arrangement of the protective measures for the flat ground spoil yard shall meet the following requirements.
1 Coffer slag weirs or foot protection measures should be arranged at the toe of the waste slag yard, and drainage measures should be arranged on the top of the slag and slope.
2 The upstream of the waste slag yard should be arranged with flood drains according to the water catchment situation.
3 Re-cultivation or planting measures should be taken on the top of the waste dump; plant measures should be given priority to the slope surface, and the slope ratio is large.
Comprehensive slope protection measures should be taken at the slope of 1.1.5.
4 For waste slag to fill recessed land, priority should be given to re-cultivation after leveling or planting measures should be taken.
5.8.3 The overall arrangement of protective measures for slope-type spoil yard shall meet the following requirements.
1 Slag retaining walls or foot protection measures should be arranged at the foot of the slag pile, and drainage measures should be arranged on the top and slope of the slag.
2 If there is water catchment upstream of the waste slag yard, flood drainage facilities shall be arranged.
3 Re-cultivation or vegetation measures should be taken on the top of the waste slag yard; vegetation measures should be taken first on the slope surface, and the slope ratio is large.
In the ratio of 1.1.5, comprehensive slope protection measures should be adopted.
5.8.4 According to flood disposal methods and slag dumping methods, trench-type spoil yards can be divided into flood interception type, flood detention type and
Fill the ditch. The overall arrangement of protective measures for trench-type spoil yard shall meet the following requirements.
1 The upstream flood of the flood interception spoil yard can be discharged into the adjacent channel through the flood discharge tunnel, or through
Flood drainage tunnels, flood drainage culverts, flood drainage canals and other methods are discharged to the downstream of the site. The foot of the slag slope should be equipped with a slag retaining wall or guard
Foot measures, drainage measures should be arranged on the top of the slag and slope.
2 A slag blocking dam should be arranged downstream of the flood detention spoil yard. The slag dam should be equipped with flood overflow, energy dissipation and other facilities.
3 Ditch-filling waste slag yards should arrange flood drains according to upstream catchment conditions. Slag retaining wall should be set at the foot of the slag slope
Or foot protection measures, drainage measures should be arranged on the top of the slag and slope.
4 The trench-type waste slag yard should be filled with large rocks with hard lithology and good water resistance at the bottom of the ditch.
The formation of drainage blind ditch or drainage base.
5.8.5 The overall arrangement of protective measures for Linhe type spoil yard shall meet the following requirements.
1 The protective measures of the slag foot facing the water surface shall meet the requirements of anti-impact stability.
2 It is advisable to lay a slag-blocking embankment at the foot of the slope on the water-incoming side, or set up mortar masonry, dry masonry, riprap, firewood pillows, etc.
Foot measures.
3 Slope protection measures should be taken for the water-incoming slope below the design flood level; slopes above the design flood level
Plant measures should be taken first, and comprehensive slope protection measures should be taken if the slope ratio is greater than 1.1.5.
4 Cut-off and drainage measures should be arranged on the top of the slag and the slope.
5 Re-cultivation or planting measures should be taken on the top of the spoil yard.
5.8.6 The overall arrangement of protective measures for the reservoir-type spoil yard shall meet the following requirements.
1 According to the topography and landform, the flood during the construction period, and the impact of water and soil erosion caused by water storage inundation, the mining
Take corresponding engineering and temporary protective measures; plant measures are not required for the bottom-type waste slag yard and the middle-sized slag yard of the warehouse.
When necessary, it should be determined in conjunction with the analysis of the impact of water and soil loss before the water storage inundation.
2 When the overflow of the top of the silo bottom-type spoil yard and the middle-sized slag yard may cause water and soil loss, the response should be
Take capping measures for the slag top.
3 When the slag slope is affected by the fall of water level, slope protection measures should be taken.
5.8.7 The slag field with the amount of discarded slag greater than 500,000 m³ or the slag pile height greater than 20m shall be based on the stability analysis.
The protection design shall be carried out on the basis and shall include the following contents.
1 Determining factors and basis for the level of waste slag yard and design standards.
2 Basic treatment design of waste slag yard and protection engineering.
3 Hydrological calculation and scouring calculation of the flood control and drainage facilities of the spoil yard.
4 Blocking engineering design of spoil yard.
5 Slope protection engineering design of spoil yard.
6 Design of flood control and drainage engineering of waste slag yard.
7 Design of plant measures for waste slag yard.
8 Design of temporary measures for spoil yard.
NB/T 10344-2019
(Code for design of water and soil conservation in hydropower projects)
ICS 27.140
NB P 59
Energy Industry Standards of the People's Republic of China
Design Code for Water and Soil Conservation of Hydropower Projects
Code for Design of Soil and Water Conservation for Hydropower Projects
Released on.2019-12-30 Implemented on 2020-07-01
Issued by the National Energy Administration
1 General
1.0.1 In order to standardize the design of water and soil conservation of hydropower projects, control the design quality, prevent soil erosion and its hazards
This standard is formulated to restore and improve the ecological environment and ensure the safety of water and soil conservation projects.
1.0.2 This code is applicable to water and soil conservation design of hydropower projects.
1.0.3 The water and soil conservation design of hydropower projects should follow local conditions, comprehensive management, safety and reliability, and focus on efficiency.
Based on the principle of benefit, carry out corresponding investigations, surveys, tests and special studies, and carry out the design of various measures.
1.0.4 The water and soil conservation design of hydropower projects shall not only comply with this code, but also comply with the current relevant national standards.
Quasi-provisions.
5 Design of waste slag yard
5.1 General provisions
5.1.1 The design of the spoil yard shall meet the following requirements.
1 The design of the waste slag yard should be carried out simultaneously with the design of the main project, and adhere to local conditions, safety and reliability,
Principles of economic rationality, combination of prevention and treatment, and process control.
2 The site selection of the waste slag yard shall be coordinated and synchronized with the design of the main project, so as to meet the requirements of water and soil conservatio...
|