CN102733555A - Roof drainage method for reducing urban water-logging - Google Patents
Roof drainage method for reducing urban water-logging Download PDFInfo
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- CN102733555A CN102733555A CN201210249853XA CN201210249853A CN102733555A CN 102733555 A CN102733555 A CN 102733555A CN 201210249853X A CN201210249853X A CN 201210249853XA CN 201210249853 A CN201210249853 A CN 201210249853A CN 102733555 A CN102733555 A CN 102733555A
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- roof
- roofing
- dewatering installation
- weep hole
- drainage
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Abstract
The invention relates to a construction roof drainage method. According to the method provided by the invention, a drainage device is mounted on a roof to increase the height of a water outlet of the drainage device, so that the water outlet is 5-10 cm higher than the roof; and meanwhile, water outlets with a proper drainage capability are arranged at positions which are equal to or lower than the height of the roof on the pipe wall of a drainage pipe of the drainage device. The construction roof drainage method provided by the invention has the following advantages of relieving roof rain flowing-out time, reducing rain peak flow on the urban ground, and reducing the urban water-logging damage caused by rainstorms.
Description
Technical field
The present invention relates to a kind of building roof water discharge method.
Background technology
All be provided with dewatering installation on the roofing of modern building, the outfall of these dewatering installations is installed in the low-lying place of roofing, and the ponding that the ponding that forms on the roofing, particularly heavy rain can form is at short notice in time got rid of outside the building.Traditional roof drainage method is to be target to compile with getting rid of roof ponding as early as possible; This has just quickened rainwater compiling on urban ground, since concrete construction in the urban cells, flexible pavement; The increase of a large amount of waterproof areas such as parking lot; Thereby urban ground discharge is increased, and the peak flow increases, and causes more and more serious city waterlogging problem.The shortcoming of traditional roof drainage method is: each underlying surface rainwater is concentrated discharging, and the surface runoff peak flow is excessive, has caused because of the frequent city waterlogging problem that produces of heavy rain.
Summary of the invention
Technical problem to be solved by this invention just provides a kind ofly can cut down urban ground rainwater peak flood flow, reduces the roof drainage method of city waterlogging.
Technical problem to be solved by this invention realizes by this method: dewatering installation is installed on the roofing; Improve the outfall height of dewatering installation; Make outfall be higher than roofing 5 ~ 10cm, the while equates on the gutter tube wall of dewatering installation, with the roofing height or lower slightly position offers the weep hole of drainability in right amount.
Because the outfall of dewatering installation is higher than roofing, the drainage water level of roofing is increased, when heavy rain is attacked; Roofing can be saved a certain amount of water; Effluent the time so the present invention can delay rain water on roof, cut down urban ground rainwater peak flood flow, reduce the harm of city waterlogging.Owing to offer weep hole on the gutter tube wall, under the situation of light rain, moderate rain or after the heavy rain, dewatering installation still keeps suitable drainability, can drain the ponding on the roofing again.The present invention has following advantage: can delay rain water on roof and effluent the time, cut down urban ground rainwater peak flood flow, reduce the city waterlogging infringement that heavy rain produces.
Description of drawings
Description of drawings of the present invention is following:
Fig. 1 is the dewatering installation scheme of installation of this method invention.
Among the figure: 1. dewatering installation; 2. roofing; 3. outfall; 4. gutter; 5. weep hole; 6. syphon; 7. float valve mechanism.
The specific embodiment
Design of the present invention is: hold back with regard to rainwater from the source; Temporarily rainwater is stored and on roofing, delay rain water on roof and effluent the time; Reduce the peak flow that rain water on roof is discharged; Make the discharging of avoiding the peak hour of the rainwater of roofing and other underlying surfaces, cut down the rainfall runoff peak flood flow, ability thereby the rain flood of enhancing urban pipe network is regulated and stored.
Invention is described further to this method below in conjunction with accompanying drawing:
As shown in Figure 1; This method invention is that dewatering installation 1 is installed on the roofing 2, improves outfall 3 height of dewatering installation 1; Make outfall 3 be higher than roofing 5 ~ 10cm, the while highly equates on the tube wall of gutter 4, with roofing 2 or lower slightly position offers the weep hole 5 of drainability in right amount.
Because the outfall 3 of dewatering installation 1 is higher than roofing 2, the drainage water level of roofing 2 is increased, when heavy rain is attacked; Roofing can be saved a certain amount of water; Effluent the time so the present invention can delay rain water on roof, cut down urban ground rainwater peak flood flow, reduce the harm of city waterlogging.Because the tube wall on the gutter 4 offers weep hole 5, under the situation of light rain, moderate rain or after the heavy rain, dewatering installation 1 still keeps suitable drainability, can drain the ponding on the roofing 2 again.
Because weep hole 5 drainabilities are less, after heavy rain,, syphon 6 is installed on gutter 4 tops of dewatering installation 1 in order to accelerate to get rid of the ponding of roofing 2, the inflow entrance of syphon 6 is in the face of roofing 2, and the flow export of syphon 6 stretches in the gutter 4.
Because it is the situation of raining is different, also different to the requirement in dewatering installation 1 upper water-out hole 5.Generally, require weep hole 5 to have drainability completely, but when heavy rain, then need weep hole 5 to weaken drainability, even close weep hole 5, hold back to realize rainwater.So the present invention can make in this way: with the switching of float valve mechanism 7 control weep holes 5, weep hole 5 is a normally open, when roof ponding reaches setting height, closes weep hole 5 by float valve mechanism 7.
Embodiment: the total land used 3ha of Chongqing City's green building demonstration quarter, wherein building land 0.63ha accounts for 21%; Public greening land used 0.81ha accounts for 27%; Landscape water body water scenery area is 0.33ha, accounts for 11%; Land for roads 0.27ha accounts for 9%; Hard surfacing 0.96ha accounts for 32%.The sub-district housing construction comprises high level, multistory building, building roof utilization rate 100%.
1, the traditional determined sub-district of roof drainage method rainwater design discharge Q
Rainwater design discharge formula should be calculated as follows, promptly
Q=Ψ
mqF
Ψ wherein
mBe average runoff coefficient, press underlying surface kind weighted average calculation in the table 1, q gets Chongqing City's storm intensity, q=
, P designs the recurrence interval, gets 2 years, the t time of concentration is got 5min, F is a catchment area, gets 3ha, calculate Q=693.62L/s.
Table 1 flow runoff coefficient computational chart
2, according to the present invention with dewatering installation hoisting depth H
1Confirm that rain water on roof produces the time t of runoff
1
Because of the rainfall depth H=
=
, rainfall duration t=then
, A wherein
1, c, b, n is local parameter, thereby extrapolates the relation of rainfall depth H and rainfall duration t, rain water on roof produces runoff rainfall depth H constantly and equals dewatering installation hoisting depth H
1In the dewatering installation hoisting depth is 50mm, when the heavy rain recurrence interval is 2 years, and rainfall duration t
1During=26.77min, the rainfall degree of depth just equals the dewatering installation hoisting depth, and when promptly the dewatering installation hoisting depth was 50mm, rain water on roof began to produce runoff behind 26.77min.
3, this method is invented determined sub-district rainwater design discharge Q ＇
A) t
0The rainwater design discharge Q of moment sub-district other gathering ground except that roofing
1
Q
1=Ψ
m＇qF
Ψ wherein
m＇=0.418, F=2.37ha, t
0=5min, P=2, calculate rainwater design discharge Q
1=362.94 L/s.
B) t
1+ t
0Moment sub-district rainwater design discharge Q
2
Q
2=Ψ
mqF
Ψ wherein
m=0.628, F=3ha, t
1=26.77min, P=2, calculate rainwater design discharge Q
2=346.47 L/s.
Can know sub-district rainwater design discharge Q ＇=Max { Q by heavy rain ultimate strength principle
1,Q
2, so the rain water on roof drainage system improves back sub-district rainwater design discharge Q ＇=362.94 L/s.
4, use this method invention back sub-district rainwater peak flood flow reduction rate
The difference Q=Q-Q ＇=693.62-362.94=330.68L/s of prior art and rainwater design discharge of the present invention,
Peak flow reduction rate
100% = 47.67%.
Draw from present embodiment, use this method invention can make peak flood flow cut down 47.67%, can reduce the city waterlogging infringement that heavy rain produces greatly.
Claims (3)
1. roof drainage method that reduces the city waterlogging; Dewatering installation is installed on the roofing; It is characterized in that: the outfall height that improves dewatering installation; Make outfall be higher than roofing 5 ~ 10cm, on the gutter tube wall of dewatering installation, with the roofing height, equate simultaneously or lower slightly position offers the weep hole of an amount of drainability.
2. roof drainage method according to claim 1 is characterized in that: syphon is installed on the gutter top at dewatering installation, and siphonal inflow entrance is in the face of roofing, and siphonal flow export stretches in the gutter.
3. roof drainage method according to claim 2 is characterized in that: with the switching of float valve mechanism controls weep hole, weep hole is a normally open, and when roof ponding reached setting height, mechanism closed weep hole by float valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210249853XA CN102733555A (en) | 2012-07-19 | 2012-07-19 | Roof drainage method for reducing urban water-logging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210249853XA CN102733555A (en) | 2012-07-19 | 2012-07-19 | Roof drainage method for reducing urban water-logging |
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| CN102733555A true CN102733555A (en) | 2012-10-17 |
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ID=46989801
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210249853XA Pending CN102733555A (en) | 2012-07-19 | 2012-07-19 | Roof drainage method for reducing urban water-logging |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012593A (en) * | 2022-05-27 | 2022-09-06 | 天津大学 | Flood control roof water storage device for urban roof |
| CN116145908A (en) * | 2023-03-16 | 2023-05-23 | 珠江水利委员会珠江水利科学研究院 | Roof water storage and drainage control device for urban waterlogging prevention |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2725468A1 (en) * | 1976-06-09 | 1977-12-22 | Kontekla Oy | RAINWATER ROOF FOUNTAIN FOR BUILDINGS |
| CN1629418A (en) * | 2003-12-15 | 2005-06-22 | 陈瑞文 | Community flood control method and wall falling blow head capable of automatic adjustment for water output capacity |
| CN2818627Y (en) * | 2005-07-11 | 2006-09-20 | 深圳市宇顺工程技术有限公司 | Syphon rain |
| CN101886409A (en) * | 2010-06-25 | 2010-11-17 | 同济大学 | Automatic initial rainwater draining device for vertical roof |
| CN102455200A (en) * | 2010-10-22 | 2012-05-16 | 中国农业科学院农业资源与农业区划研究所 | Farmland or sloping field runoff water flow monitoring device |
| CN102587597A (en) * | 2012-03-30 | 2012-07-18 | 重庆大学 | Rainwater vertical tube mounting structure for flat roof of building based on low impact development thought and mounting method |
-
2012
- 2012-07-19 CN CN201210249853XA patent/CN102733555A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2725468A1 (en) * | 1976-06-09 | 1977-12-22 | Kontekla Oy | RAINWATER ROOF FOUNTAIN FOR BUILDINGS |
| CN1629418A (en) * | 2003-12-15 | 2005-06-22 | 陈瑞文 | Community flood control method and wall falling blow head capable of automatic adjustment for water output capacity |
| CN2818627Y (en) * | 2005-07-11 | 2006-09-20 | 深圳市宇顺工程技术有限公司 | Syphon rain |
| CN101886409A (en) * | 2010-06-25 | 2010-11-17 | 同济大学 | Automatic initial rainwater draining device for vertical roof |
| CN102455200A (en) * | 2010-10-22 | 2012-05-16 | 中国农业科学院农业资源与农业区划研究所 | Farmland or sloping field runoff water flow monitoring device |
| CN102587597A (en) * | 2012-03-30 | 2012-07-18 | 重庆大学 | Rainwater vertical tube mounting structure for flat roof of building based on low impact development thought and mounting method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012593A (en) * | 2022-05-27 | 2022-09-06 | 天津大学 | Flood control roof water storage device for urban roof |
| CN116145908A (en) * | 2023-03-16 | 2023-05-23 | 珠江水利委员会珠江水利科学研究院 | Roof water storage and drainage control device for urban waterlogging prevention |
| CN116145908B (en) * | 2023-03-16 | 2023-10-27 | 珠江水利委员会珠江水利科学研究院 | Roof water storage and drainage control device for urban waterlogging prevention |
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Application publication date: 20121017 |