CN108560475A - The gridding construction method of Plain network of rivers urban flooding control loop - Google Patents

Abstract

The invention discloses a kind of gridding construction methods of Plain network of rivers urban flooding control loop, it is the urban periphal defence and inside in hypsography low-lying, build the closed control grid collectively constituted by dyke, sluice, pumping plant and auxiliary facility buildings；The method of the present invention is that more griddings are built, and not only checked the floods invasion, but also can drain the rainwater prevention waterlogging in control area in time.

Description

The gridding construction method of Plain network of rivers urban flooding control loop

Technical field

The invention belongs to planning for water resources development fields, are related to the gridding construction method of Plain network of rivers urban flooding control loop.

Background technology

East China city is located at coastal area, and the most hypsography low-lying in present position, river and lake is numerous, and the network of rivers is gathered, and people Mouth is concentrated, economically developed.But the urban water conservancy development of infrastructure network lags behind urban development, therefore, builds very well equipped Urban flood defence water log control control loop is particularly important to ensureing urban safety.

Currently, the method for defence Urban Flood Waterlogging is usually independent grid method, it is exactly at every compared with Tai Ho Road two sides Autonomous closure circle is built, resists its flood respectively, each autonomous closure circle is equivalent to individual Xu Qu, and this method needs in river Dyke up to standard is built in two sides respectively, and flood control battle line is long, and quantities is big, and investment is higher, needs administrative staff and expense more, easy shape At " flood control besieged city " phenomenon.

Invention content

The purpose of the present invention is：Design a kind of gridding construction method of Plain network of rivers urban flooding control loop, more grids Change is built, and not only checked the floods invasion, but also can drain the rainwater prevention waterlogging in control area in time.

Technical solution of the invention is：Urban periphal defence in hypsography low-lying and inside are built by dyke, sluice, pump It stands and closed control grid that necessary structure group collectively constitutes；It is as follows：

（1）Planning control circle range：Maximum design flood corresponding ground contour range in river is as control loop face in addition Product；

（2）Control loop is arranged：Using peripheral river as control loop, as control line, astragal crosses for internal Main river or road Intersection is connected to form control grid, sizing grid adaptation to local conditions；

（3）Pumping plant is distributed and scale：Sluice, pumping plant are separately positioned on the outlet in several larger outer row rivers in sealing ring, directly It connects logical with outer stream；The control building built take from row with machine row be combined, drain scale according to city importance according to 10-30 mono- meets analysis and calculates modulus of drainage, and is calculated by control grid inner area；

（4）Water level control：As needed, to being dropped in advance before river setting daily control water level, flood season control water level, rain in control loop Water level, wherein important ecoscape river carries out classification water level control according to its importance；

（5）Water-quality control：For the tail water river of sewage treatment plant, its water quality is strictly controlled, avoids connecting with internal water system as possible It is logical, pollute other rivers；Wetland park is built in the tail portion in tail water river when having ready conditions, improves water so as to plant and biological control measure Matter；

（6）Management system：After engineering is built up, day-to-day operation management through specialized department, the operational management work for the project that uniformly carries out paddling, prison Pipe is in place.

The beneficial effects of the invention are as follows：

1, urban construction totally-enclosed control loop in the Plain network of rivers is the main path of flood prevention and water-logging control, effectively eliminates flood, substantially Degree, which reduces, builds flood construction investment and operational and administrative expenses, adapts to demand of the modern city to water environment and water landscape.

2, " three seperation, three controls " are realized to urban water system, solves flood contradiction, ensures urban safety；" three seperation " is Refer to：Inside and outside separated, height separates, town and country are separated；" three control " refers to：Freshwater line is controlled, control partition water controls river Water quality.

3, totally-enclosed control grid is built within the scope of a piece of network of waterways, uniformly resists flood, is equivalent to the connection of Xu Qu Country fair, this method effectively prevent flood, save construction fund and administration fee, are conducive to build ecocity, promote city scape It sees.

4, after engineering is built up, change differentiated control pattern, day-to-day operation management through specialized department in the past and uniformly carry out project of paddling Operational management works, and supervision is in place.

Description of the drawings

Fig. 1 is embodiment canal backlands area water system rough schematic view.

Fig. 2 is that the embodiment canal north sections Yun Dong typical case's flood controls grid plan schematic diagram.

Specific implementation mode

The technical solution further illustrated the present invention with reference to embodiment, but it is not to be construed as the limit to technical solution System.

Embodiment：As shown in Figure 1, Huai'an is located in Basin of Huaihe River downstream, and on the south North of Yangtze River, Xinyihe River, Hongze To the east of lake, 10030 square kilometres of area has saying for " three mountains, one water, seven points of fields "；Domestic hypsography low-lying, the network of waterways are gathered, and have middle ditch Grade or more about 8000, rivers and canals；City main city zone is located at canal backlands area, 835 square kilometres of the domestic gross area；Flood control control net position In inner city, about 500 square kilometres of control area, about 280 square kilometres of sealing ring, ground elevation one wherein to the west of Li Canal As be 10.0-6.0 meters；About 220 square kilometres of sealing ring area to the east of Li Canal, ground elevation is generally 9.0-5.5 meters；Region It is interior populous, density reach 3000 people/square kilometre；Economic prosperity, mean unit GDP reach 4.2 hundred million yuan/square kilometre； There are about 500, rivers and canals in close-network, wherein compared with Tai Ho Road 11, respectively：Grand Canal, Li Canal, Gu Yanhe, unity river, bavin Meter He, great Zhi He, one station irrigation channel of hay mound, Dong Huanchenghe（Planning）, Nan Zhihe, fishing riverfront, Heng He, kiln hood river；The river depth of water one As at 1.5-2.0 meters, river bed is gentle, and flow velocity is smaller, and water environment is poor；River Design standard be 5 years one meet, meet with heavy rain or During outfall waterway flood passage, easily because flood causes flood, loss huge；Such as big floods in 2003, outfall waterway enabled flood passage, canal backlands area By flooded area up to more than 270,000 mus, wherein about 12.6 ten thousand mu of weight calamity, more than 0.6 ten thousand families of house water inlet along the line have many enterprises to stop because of flood Production, nearly 2.9 hundred million yuan of city direct economic loss.

For this purpose, as shown in Fig. 2, building Huai'an urban flood defence water log control control loop according to step：

（1）Control loop range and area

（1-1）Transport western sealing ring

（1-1-1）Area：By surrounding area between two rivers, Li Canal, outfall waterway, 280 square kilometres（There is about 20 squares of highland Kilometer is discharged into canal certainly）, wherein agriculture district is roughly equal to 160 square kilometres；

（1-1-2）Outer stream stage：Two 15.01 meters of river design flood levels, Huaian grade separation contain upper 13.33 meters of design flood level, canal 10.8 meters of highest design water level；

（1-2）The eastern sealing ring of fortune

（1-2-1）Area：By Li Canal, ancient the Yellow River, outfall waterway and Dong Huanchenghe（Quasi- new excavation）Between surround area, 220 Square kilometre, wherein agriculture district is roughly equal to 100 square kilometres；

（1-2-2）Outer stream stage：10.8 meters of Li Canal highest design water level, Huaian grade separation are contained lower 12.73 meters of design flood level, are entered Seawater road Heng He wears 11.32 meters of design flood level at dike culvert；

（2）Control loop is arranged

It is boundary that western sealing ring, which is transported, with main river and ground elevation, is divided into 4 grids（W1-W4 in attached drawing 2）, wherein directly Being discharged into Used in Huaihe River Channel Progect road has 5, lock station（Containing planning 3, industrial park 2,2. 1, the southern stations Yang Miao）, it is discharged into Grand Canal lock station Many places；

The eastern sealing ring of fortune is that boundary is divided into 5 nets with the Dong Huanchenghe excavated to the east of planning with main river and ground elevation Lattice（E1-E5 in attached drawing 2）, wherein being directly discharged into Used in Huaihe River Channel Progect road has 3, lock station（Containing planning 2, Dong Huanchenghe, Xin Jianhe Each 1）, it is discharged at ancient the Yellow River pumping plant 2, is discharged at Li Canal 3（Plan at 1 to be desolate lake pumping plant）；

（3）Pumping plant is arranged and scale

It is calculated according to analysis, is 1500 cubic meters per seconds from total flow is arranged in region in outfall waterway not flood passage；Outfall waterway During flood passage, pump drainage flow is 1000 cubic meters per seconds；To the east of illustrate for the lattice of the belt network of waterways：Dong Huanchenghe is that planning is new Construct a canal, have both draining, shipping, landscape function, with other grid through transports control, hold let out 50 square kilometres excess water discharge appoint Business；According to river drainage area and design standard, water drainage river and culverts and water gates carry out analysis calculating according to from 20 years one chances of row, drain Pumping plant was designed according to 10 years one chances；River Design flow is 200 cubic meters per seconds, and design discharge of pumping station is 100 cubic metres It is per second；

（4）Water level control

Dong Huanchenghe has both navigation function, and daily control water level is navigable water stage, takes 4.0 meters, and it is 3.8 meters that flood season, which controls water level, Pre- precipitation position is 3.5 meters before rain；

（5）Management organization

After engineering is built up, a management organization is set.

Claims (1)

1. the gridding construction method of Plain network of rivers urban flooding control loop, it is characterized in that：Hypsography low-lying urban periphal defence and The closed control grid collectively constituted by dyke, sluice, pumping plant and necessary structure group is built in inside；Its specific steps It is as follows：

（1）Planning control circle range：Maximum design flood corresponding ground contour range in river is as control loop face in addition Product；

（2）Control loop is arranged：Using peripheral river as control loop, as control line, astragal crosses for internal Main river or road Intersection is connected to form control grid, sizing grid adaptation to local conditions；

（3）Pumping plant is distributed and scale：Sluice, pumping plant are separately positioned on the outlet in several larger outer row rivers in sealing ring, directly It connects logical with outer stream；The control building built take from row with machine row be combined, drain scale according to city importance according to 10-30 mono- meets analysis and calculates modulus of drainage, and is calculated by control grid inner area；

（4）Water level control：As needed, to being dropped in advance before river setting daily control water level, flood season control water level, rain in control loop Water level, wherein important ecoscape river carries out classification water level control according to its importance；

（5）Water-quality control：For the tail water river of sewage treatment plant, its water quality is strictly controlled, avoids connecting with internal water system as possible It is logical, pollute other rivers；Wetland park is built in the tail portion in tail water river when having ready conditions, improves water so as to plant and biological control measure Matter；

（6）Management system：After engineering is built up, day-to-day operation management through specialized department, the operational management work for the project that uniformly carries out paddling, prison Pipe is in place.