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Item No.:
×× project
Special construction plan for temporary water use
Editor:
Auditors:
Reviewers:
XXX Construction Group Co., Ltd
XX month of XXXX
Table of Contents
Chapter 1 Preparation Instructions and Basis for Preparation 1
1.1Preparation notes 1
1.2Basis of preparation 1
Chapter 2 Engineering Overview 1
2.1 Engineering Overview 1
2. 2 Overview of water use in the project 2
Chapter 3 Water Supply Design 2
3. 1 Water source introduction 2
3. 2 Outdoor fire water 2
3. 3Production of water supply 3
3. 4 Water supply for living 3
3. 5 Water supply in the sales office 3
3. 6 Measures for insufficient water on site 3
3. 7 Temporary transfer measures for water in super high-rise buildings 3
3. 8 Construction water calculation 4
Chapter 4 Drainage Arrangement 5
4.1 Stormwater drainage 6
4.2 Production sewage drainage 6
4.3 Domestic sewage drainage 8
Chapter 5 Water Supply Network Laying and Maintenance Management 11
5.1 Pipeline laying and related requirements 11
5.2Maintenance and management of waterfront systems 11
Chapter VI Supplementary Figure 12
6.1 construction site horizontal plane layout drawing 12
6.2 Construction site drainage layout plan 12
6.3 Schematic diagram of water supply on the floor of the construction site 12
Chapter 1 Preparation Instructions and Basis for Preparation
1.1 Preparation Instructions
In order to meet the needs of living and construction water at the construction site, this plan is formulated according to the actual situation of the project, which is used as a guiding document for temporary water use and drainage of the project, including the calculation of temporary water consumption, the layout of the line and the layout of the sewage system. The actual implementation should be guided by this plan, and at the same time according to the actual situation of the site to improve and perfect, if the implementation needs to be modified, the modification plan must be submitted to the relevant units for approval before implementation. Temporary water projects must be jointly accepted by the preparation, examination and approval, approval departments and user units, and can only be put into use after they are qualified.
1.2 Basis for compilation
- Actual survey of the construction site.
- The number of workforce at peak times on the jobsite
- General construction schedule
- Construction Specifications
- Construction organization design of the project
- Fifth edition of the Handbook of Calculations for Building Construction
- Pinming Building Safety Calculation Software (V12.0)
- Safe and civilized production standard manual.
Chapter 2 Engineering Overview
2.1 Engineering Overview
| The name of the project | |||||||
| Project location | |||||||
| Construction | |||||||
| Design unit | |||||||
| Supervision unit | |||||||
| Construction unit | |||||||
| serial number | Building No | Floor Area (m2) | Height (m) | Number of layers | Ceiling Height(m) | Structural form | Type of building |
2. 2 Overview of project water use
The water used on the site of this project mainly includes five parts: engineering water, mechanical water, domestic water on the construction site, water in the living area, and fire water, among which the water on the site is mainly concrete maintenance water, and the mechanical water is not considered because there is no special water use machinery, and the water used by the construction site and the living area is determined according to the number of people during the peak period of construction.
The water pipeline of this project is a galvanized steel pipe, the pipe diameter is determined according to the water consumption, there are two centralized water supply points at the construction site, a water supply point is set up in the concrete pump truck and each material processing area, and a water supply point is set up on each floor during the main construction.
In the construction area, when the construction area is large, there are many unit projects, there is a large temporary living area and the construction period is long, in order to meet the production water, mechanical water, fire water, and domestic water in the construction process, a temporary water supply system can be considered. When the water pressure and water volume of the temporary water source cannot meet the continuous construction, temporary water towers (i.e., high-level water tanks), water pumps and other facilities should also be set up.
Chapter 3 Water Supply Design
3. 1 Water source introduction
Introduced by the outdoor pipe network, the construction site provides two inlets (see the water supply and drainage layout plan for details), which are respectively set at the north of the construction site and the east of the construction site at Party A's office building, and the water meter is connected. The waterfront pipe network at the construction site is a combined pipe network for living, production and fire protection. In the early stage of construction (basement to the second floor above ground), the water supply is directly supplied by the municipal pipe network. In the later stage of construction, the water supply is pressurized by the pump to meet the needs of construction and fire fighting water.
3. 2 Outdoor fire water
Outdoor fire water supply system in addition to the high-rise fire hydrant water source using high-pressure water pump water supply, the rest are low-pressure fire water supply system, along the construction site temporary fence and construction road roadside layout water supply ring pipe network, not less than 1.5 meters from the roadside, in the construction site of the steel workshop, carpentry workshop, between floors, office buildings, living areas, etc. are set up fire hydrants as required, the bolt mouth is DN65, 25 meters of water hose, 19mm caliber water gun. The fire water supply riser on the floor is made of DN100 galvanized steel pipe, and the fire hydrant is set up every other floor. The hydrants have DN65 bolts, and each hydrant is equipped with a 25-metre-long fire hose and a 19mm water cannon. The water pressure of outdoor fire hydrants and temporary fire hydrants is provided by the municipal pipe network, which can fully meet the fire protection requirements (the static pressure of the fire hydrant at the most unfavorable point is not less than 10m). In addition to being equipped with a 25m hose, each outdoor temporary fire hydrant should also be equipped with two 5Kg dry powder fire extinguishers, and the fire extinguishers and fire hoses should be prevented from entering the fire box.
3. 3 Production of feed water
Outdoor production water supply pipe arrangement: A DN25 water supply pipe is set every 25m on the water supply ring pipe of the outdoor fire hydrant and a valve is installed to control it. Indoor water supply pipe arrangement: A DN25 water supply valve is set on each floor of the room. The water on the floor is pumped by a high-pressure booster pump, which is connected to each floor from the water supply pipeline, and then arranged vertically upward, and the vertical pipe is made of DN65 galvanized steel pipe. Each floor is equipped with a pipe diameter of DN25 faucet. The construction of the water supply pipe is synchronized with the temporary fire water supply pipe to meet the construction water requirements. The pipeline between the water supply valve and the water point is temporarily connected with a rubber hose according to the actual situation.
3. 4 Life water supply
The main pipe of the domestic water supply system uses the pipe network of the fire water supply system, and temporary water points are set up at the toilet of the outdoor on-site office area on the first floor and the temporary toilet of the tower, and the water supply system pipe is made of galvanized steel pipe.
3. 5 water supply in the sales office
In order to ensure the water supply of the sales office during the construction stage, a valve is reserved in the sales office near the construction site, and the pipe diameter is DN32.
3. 6 Measures for insufficient water on site
Due to the proximity of the project to the freshwater river, after coordination and communication with the relevant management departments of the river, the water used for the project can be taken at the river, considering the quality of the freshwater, the water is only used for the construction area, including road washing, concrete maintenance, etc.
Due to the limitation of the location of the project, according to the communication and confirmation with the relevant government departments, the project can dig its own well to obtain water to supplement the shortage of water on site. The groundwater in this area is freshwater, and the water is mainly used for concrete maintenance and road washing in the site.
3. 7 Temporary transfer measures for water use in super high-rise buildings
Because this project is a super high-rise building, considering the construction cost, the head of the water pump can not meet the water requirements of the upper floor, and it is now planned to set up a temporary water tank on the middle floor, and the water will be pumped to the temporary water tank by the ground water pump, and then the water pump at the temporary water tank will pump the water to the upper floors for use. The parameters are as follows:
| Transit pools are set up on floors | |
| The total number of tanks in the pool | The volume of a single tank |
| The model of the water pump | The number of pumps equipped |
3. 8 construction water calculation
The temporary water supply of construction sites mainly includes three types: production water, domestic water and fire water. Production water includes water for engineering construction and construction machinery. Domestic water includes domestic water at the construction site and domestic water in the living area of management personnel.
3.8.1 Calculation of construction water
The water consumption on the construction site can be calculated as follows:
q1=k1(ΣQ1×N1) k2/(8*3600)
During the ceremony:
q1——施工用水量(L/S)
k1 - unpredicted construction water coefficient (take 1.1)
Q1 - The amount of work planned to be completed per shift (calculated according to the concrete work and modified according to the project workload m3)
N1 - Construction water quota (see the table below for the construction calculation manual)
k2 – Unbalanced coefficient of water use (1.5)
| serial number | The name of the project | Water consumption | The amount of work planned to be completed in each shift (in terms of concrete quantity) Q = Q1 m3 |
| 1 | Concrete is naturally cured | 300L/M3 |
q1=1.1×Q×300×1.5/(8×3600)= L/S
3.8.2 Calculation of mechanical water consumption
The water consumption of construction machinery can be as follows:
q2=k1(Q2N2)K3/8×3600
where K1 - the construction water coefficient is not predicted, take 1.1
Q2 - the same number of machinery, take the main water machinery, pressure test pump 2
N2 - water quota for construction machinery shifts, 4×300L for pressure test pumps
K3 - the unbalanced coefficient of water use in construction machinery, take 1.15
The water consumption of construction machinery q2 = 1.10×2×4×300×1.15/(8×3600) = 0.105 L/S
3.8.3 Calculation of domestic water consumption at construction sites
The domestic water consumption of the construction site can be calculated as follows:
q3=k4P1N3/t×8×3600
where q3 - domestic water consumption at the construction site (L/S)
K4 - Unbalanced coefficient of domestic water at the construction site (take 1.5)
P1 - Peak number of people on the construction site (person)
N3 - construction site domestic water quota (take 40L/person.shift)
t – Number of shifts per day (2 shifts)
q3=1.5× (P1) ×40/(2×8×3600)= L/s
3.8.4 Calculation of water consumption in the living area of management personnel
The water consumption in the living quarters of managers can be calculated as follows:
q4=p2n4k5/24×3600
Q4 - Domestic water in the living area
P2 - Number of residents in the living area (taken from people)
n4 - the quota of all domestic water in the living area day and night (take 100 L/person)
k5 - uneven coefficient of domestic water in living area (take 2.0)
q4=p2n4k5/24×3600= P2 ×100×2/（24×3600）= L/s
3.8.5 Calculation of water consumption for fire fighting
If the number of people in the residential area is less than 5000, the water consumption shall be 10 L/person, and the water consumption shall be 10 L/person if the construction site is less than 25hm2.
3.8.6 Calculation of total water use
(Q1 PlusQ2 PlusQ3 PlusQ4)= Plus Plus = >Q5=10,
则Q=q1 +q2 +q3+q4 = L/s
Finally, the total water consumption calculated should also be increased by 10% to compensate for the inevitable water pipe leakage loss, so the total water consumption of this project is (P×(1+10%)) L/s.
3.8.7 Calculation of water supply pipe diameter:
The pipe diameter required for the temporary network on the construction site can be calculated as follows:
Wherein: d -- diameter of water distribution pipe (m);
Q ──施工工地用水量(L/S)；
V – the velocity of water flow in the pipe network (m/s), take V=1.6 (m/s);
The diameter of the water supply pipe is calculated by the formula: d = [4× Q / (3.14×1.6×1000)] 0.5 = m = mm
A water supply pipe with an inner diameter of 100 mm is required for the temporary network.
Chapter 4 Drainage Arrangement
The water to be discharged during the construction period mainly includes three categories: rainwater, production sewage and domestic sewage. The following measures are adopted for different types of sewage:
4.1 Stormwater drainage
Rainwater generated by weather is free of any pollution and can be discharged directly through drainage pipes. The rainwater on the ground is preliminarily precipitated through the sedimentation tank set up in the middle of the open ditch on the ground.
4.2 Production sewage drainage
The production sewage is mainly the sewage generated by on-site washing, including road washing, vehicle washing, etc.
In this project, a car wash tank is set up at the south gate and the west gate of the construction site, and a three-stage sedimentation tank and a high-pressure water gun are set up at the car wash tank. A washing platform for vehicles leaving the construction site is set up at the south gate.
The sewage discharge settings at the construction site mainly include: the washing platform adopts an automatic washing platform, a drainage ditch, a sedimentation tank, and a water collection well.
(1) Automatic flushing platform
1) The automatic washing platform is a sunken light steel concrete structure, the depth of the foundation groove of the platform is not less than 300mm, the length is not small, the dry is not less than 5m, and the width is not less than 3.5m. The bottom of the platform is hardened and leveled, the drainage slope of not less than 3% is set, the washing platform is covered with I-beam, the concrete strength of the lap around is not less than C30, the lap width is not less than 300mm, the thickness is not less than 220mm, and the drainage ditch with a width of not less than 200mm is set in a reasonable position, which is connected with the three-stage sedimentation tank. The head of the automatic flushing platform is not less than 32m, and the number of nozzles should meet the requirements of rapid flushing of vehicles.
(2) Sedimentation tank
1) The sedimentation tank should be built with blocks of not less than 120mm, and the surface should be leveled with cement mortar. The mouth of the sedimentation tank is closed with an iron grate or concrete cover.
2) The sedimentation tank shall not be less than two levels of sedimentation, the length shall not be less than 1.5m, the width shall not be less than 1.2m, the depth of the primary sedimentation tank shall not be less than 1m, and the depth of the secondary sedimentation tank shall not be less than 1.5m. The effective precipitation depth is not less than 400mm.
3) The sedimentation tank is connected to the municipal sewage pipe network.
(2) Drainage ditches
1) The drainage system should be reasonably set up in each area of the construction site, and the open drainage ditch can be set up in the operation area, material stacking area and the road in the field area, and the drainage ditch in the living area should be covered with iron grate. The drainage ditch is built with blocks, plastered and leveled, or poured with concrete to collect grout and level. The drainage ditch is set up with collection wells at the corners and at a distance of no more than 50m, and is covered with an iron grate.
2) The cross-section of the drainage ditch should not be less than 200mm x150mm.
Illustration of the impact of construction on urban drainage (3)
(3) Sedimentation tank
1) The sedimentation tank should be built with blocks of not less than 120mm, and the surface should be leveled with cement mortar. The mouth of the sedimentation tank is closed with an iron grate or concrete cover.
2) The sedimentation tank shall not be less than two levels of sedimentation, the length shall not be less than 1.5m, the width shall not be less than 1.2m, the depth of the primary sedimentation tank shall not be less than 1m, and the depth of the secondary sedimentation tank shall not be less than 1.5m. The effective precipitation depth is not less than 400mm.
3) The sedimentation tank is connected to the municipal sewage pipe network.
The sedimentation tank for construction wastewater and rainwater discharge should be set up separately from the sedimentation tank for domestic sewage discharge. The size of the sedimentation tank is determined as required.
(4) Catchment wells
1) The water collection well is built with blocks with a thickness of not less than 120mm, and the surface is leveled with cement mortar. The bottom of the collection well is hardened with concrete, and the catchment wellhead is treated with a protective railing.
2) If there is no municipal wastewater pipe network around the construction site, a water collection well should be set up and pumped regularly.
4.3 Domestic sewage drainage
Domestic sewage: mainly toilet fecal water. With a certain degree of pollution, it is necessary to set up a special toilet septic tank (finished FRP septic tank) after three levels of precipitation through a separate sewage pipe discharged into the urban sewage discharge system, the sewage pipe adopts HDPE corrugated pipe, with a diameter of ≥ 250. The septic tank should be pumped regularly, and the pumping should meet the requirements of the relevant local health and environmental protection departments.
Finished FRP septic tank
Domestic wastewater is mainly canteen oil water and other daily life wastewater. A special grease trap (finished grease trap) should be set up for the canteen wastewater, and a special sedimentation tank should also be set up for the wastewater, which will be discharged to the wastewater system after sedimentation.
Finished FRP grease trap brick grease trap
In order to exclude the above three types of wastewater, a drainage ditch is set up along the foundation pit and the periphery of the temporary road at the construction site, the drainage ditch is built with lime sand bricks, the slope is 0.2%, the shallowest point is 150, the width of the ditch is 250, along the ditch, a sedimentation tank is set up every 30 meters, and a large sedimentation tank is set up at the junction between the drainage ditch and the external sewer, which is used to remove the sediment in the wastewater, and the sedimentation tank should be cleaned regularly.
Chapter V water supply pipe network laying and maintenance management
5.1 Pipeline laying and related requirements
5.1.1. Principle of layout of temporary water supply system:
- Temporary water supply pipelines should be avoided as much as possible in the formal construction and various types of underground formal pipe network locations.
- The layout of the pipes should be simple, and the downpipes should be as close as possible to the water points of buildings or temporary facilities with high water consumption.
- The pipeline is arranged in a branch-like manner, and a simple valve well is set up if necessary for control and maintenance.
- The burial depth should not be less than 50cm, and ensure that it is not frozen and not crushed by large and heavy vehicles, and should be protected by casing when crossing the main construction road.
- When the water pressure cannot meet the water requirements, a reservoir can be set up and a temporary pressurized water pump can be set up to supply water.
- Due to the uneven construction water, a simple high-level water tank or air pressure tank water supply equipment can be set up to adjust the continuity of water use.
- Concentrated water use points in cold areas should be protected from freezing and heat preservation.
- Fire hydrants should be set up in the warehouse area, flammable material stacking area, and electrical welding processing area, and marking and protective measures should be taken to prevent vehicle collision or crushing.
- Do a good job in the maintenance and management of temporary water to prevent the phenomenon of "running, rising, dripping, leaking" and long-running water, and it is advisable to set up a water meter on the main pipe for measurement.
5.1.2. All exposed water pipes should be protected.
5.1.3. Outdoor buried steel pipes should be rusted and anti-corrosion before buried.
5.1.4. After the installation of all water supply pipelines, the hydraulic test should be carried out, and it can be put into use only after it is qualified.
5.2 Maintenance and management of the waterfront system
5.2.1 Temporary water should be managed by a special person, establish a temporary water management system, and strictly manage it to prevent unnecessary losses caused by water waste and leakage and water running.
5.2.2 The temporary water system shall be regularly inspected, maintained, and ensured that the water facilities are in good condition to ensure water supply.
5.2.3 The rainwater outlet should be cleaned and dredged regularly to ensure smooth drainage.
5.2.4 Each water meter and main water valve must be marked, and the water meter must be a protective device.
5.2.5 The installation of water pipes must be standardized and smooth, and casing pipes or culverts must be added across the road.
5.2.6 The site is responsible for the dripping water valve and faucet, and repairs or replaces it in time.
5.2.7 On-site construction water, there must be perfect water-saving measures, the development of water-saving management system, including:
- Implement the policy of "water conservation", strengthen the management of construction water, and educate workers on water use.
- Water management should be staffed with professional management personnel and a strong sense of water conservation.
- Water leakage is strictly prohibited in all parts of the site, such as water facilities, all pipes, water valves, faucets, etc.
- The water in the on-site sedimentation tank is recycled for on-site sprinkling and dust reduction or the maintenance of concrete test blocks.
Chapter VI Drawings
6.1 construction site horizontal plane layout drawing
6.2 Construction site drainage plan
6.3 Schematic diagram of water supply on the floor of the construction site
The above drawing requirements:
(1) Layout drawing of the horizontal plane of the construction site (including two parts of fire water supply and construction water, and distinguish them with colored lines)
(2) Temporary drainage layout plan of the construction site (distinguished by colored lines)
(3) Floor water supply system diagram of the construction site (the standard floor can only be marked one layer and skipped)