CN108844588A - A kind of compound rectangle flow weir monitoring mountain area stream water flow - Google Patents

A kind of compound rectangle flow weir monitoring mountain area stream water flow Download PDF

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Publication number
CN108844588A
CN108844588A CN201810555765.XA CN201810555765A CN108844588A CN 108844588 A CN108844588 A CN 108844588A CN 201810555765 A CN201810555765 A CN 201810555765A CN 108844588 A CN108844588 A CN 108844588A
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CN
China
Prior art keywords
weir
crest
flow
monitoring
water level
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CN201810555765.XA
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CN108844588B (en
Inventor
万军伟
常威
王宗星
王艺霖
项立磊
胡庐峰
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Wuhan Zhongdi hydraulic environment exploration technology Co.,Ltd.
China University of Geosciences
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China University of Geosciences
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
    • G01F1/002Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow specially adapted to be used in open channels
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
    • G01F1/007Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by measuring the level variations of storage tanks relative to the time

Abstract

The invention discloses a kind of compound rectangle flow weirs for monitoring mountain area stream water flow, including left side weir body, compound rectangle crest of weir, right side weir body, substrate, water level monitoring device hole;Left side weir body, right side weir body and substrate form the compound rectangle crest of weir, and the compound rectangle crest of weir includes that first layer thin-walled crest of weir, the second layer are laid bricks crest of weir, and the water level monitoring device hole is located in the riverbed of flow weir upstream and fixed water level monitoring device.First layer thin-walled crest of weir is used for the monitoring in mountain area, Close Tunnel, the small flow in gully river, second layer crest of weir of laying bricks is laid bricks build using cement, monitoring for flood season big flow, entire compound thin-walled crest of weir obtains data on flows using the survey calculation of water level, personal monitoring is not needed, a large amount of human cost is saved.The scientific rationality on flow weir and the accuracy of flow monitoring are improved, accurately monitors the flow and its changing rule of gully water, provides scientific accurately hydrogeological data for mountain area engineering construction.

Description

A kind of compound rectangle flow weir monitoring mountain area stream water flow
Technical field
The present invention relates to hydraulics current measured technology field more particularly to a kind of compound rectangles for monitoring mountain area stream water flow Flow weir.
Background technique
In recent years, as Mountainous high speed railway, Tunnel of Highway build Efforts To Develop, in order to prevent Tunnel Engineering Occur great prominent water burst accident in process of construction, is needed in Process of Engineering Construction to Mountain Tunnels engineering investigation especially karst region The hydrogeology in area carries out special prospecting, and underground water, the monitoring of surface water are especially heavy in the small watershed in mountain that tunnel passes through It wants.Field mountain area earth's surface, underground channel water flow flow measurement method such as Sounding Rod, current meter or range estimation combine estimation stream at present Amount, precision is too poor, and the requirement of related monitoring is not achieved, and there are also the knots of indoor flow weir (such as triangular-notch weir, rectangular weir) Structure is more single, cannot be accurately measured the stage-discharge variation in dry season or flood season, cannot provide reliably for mountain area engineering construction Hydrogeological data.
Summary of the invention
In view of this, the embodiment provides one kind to be suitable for mountain area stream water flow real-time accurate measurements for a long time Compound rectangle flow weir.
In order to solve the above technical problems, the embodiment of the present invention the technical solution adopted is that, a kind of monitoring mountain area stream water The compound rectangle flow weir of flow, including left side weir body, right side weir body, substrate, water level monitoring device hole;Left side weir body with Right side weir body is symmetrical structure, and left side weir body includes close to the rectangular configuration of stream bank and in stepped rectangular configuration; Left side weir body, right side weir body and substrate form compound rectangle crest of weir, and the compound rectangle crest of weir includes first layer sharp-crested weir Mouthful, the second layer lays bricks crest of weir;The water level monitoring device hole is located at the upstream of the compound rectangle crest of weir and for fixing a water Position monitoring device.
Preferably, the first layer thin-walled crest of weir is fabricated to thin-walled crest of weir using stainless steel plate.The thickness of the stainless steel plate Degree is 3mm~5mm;The second layer lay bricks crest of weir with a thickness of 9cm~11cm.
Preferably, stainless steel tube is buried in the water level monitoring device hole, is uniformly arranged on the pipe shaft of the stainless steel tube Aperture installs the water level monitoring device in the stainless steel tube.
The embodiment of the present invention provide technical solution bring beneficial effect be:Monitoring mountain area stream water flow of the invention The compound rectangle flow weir of amount, to monitor the flow of mountain area stream different times;It is formed using left side weir body and right side weir body multiple Formula rectangle crest of weir, the compound rectangle crest of weir use two layers of crest of weir structure, and first layer thin-walled crest of weir is used for mountain area, Close Tunnel, small stream The monitoring of the small flow in ditch river, second layer crest of weir of laying bricks are laid bricks builds using cement, for the monitoring of flood season big flow, are entirely answered The scientific rationality for improving flow weir of formula thin-walled crest of weir and the accuracy of flow monitoring;Weir body is built in the base in gully location It is effective against washing away for flood season mountain torrents on rock, a reservoir is formed at weir body rear, with the guarantee outflow weir that the water flows gently Mouthful, nature drop is formed, the water level monitoring device hole of fixed water level monitoring device is dug in reservoir, water level monitoring device can A variety of data such as water level, water temperature, conductivity are monitored, flow rate calculation is carried out using the waterlevel data of monitoring, accurate stream can be obtained Data are measured, provide reliable hydrogeological monitoring data for mountain area engineering construction.
Detailed description of the invention
Fig. 1 is the structural schematic diagram on compound rectangle flow of embodiment of the present invention weir;
Fig. 2 is the construction method flow diagram on compound rectangle flow of embodiment of the present invention weir.
Wherein:Left side weir body 1, compound rectangle crest of weir 2, right side weir body 3, substrate 4, water level monitoring device hole 5, first layer are thin Wall crest of weir 21, the second layer are laid bricks crest of weir 22, water level monitoring device 6, stainless steel tube 7, aperture 71.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention Formula is further described.
Referring to FIG. 1, the embodiment provides a kind of compound rectangle flow weir for monitoring mountain area stream water flow, Including left side weir body 1, right side weir body 3, substrate 4, water level monitoring device hole 5;Left side weir body 1 and right side weir body 3 are symmetrical Structure, left side weir body 1 include close to the rectangular configuration of stream bank and in stepped rectangular configuration;Left side weir body 1, Right side weir body 3 and substrate 4 form compound rectangle crest of weir 2, and the compound rectangle crest of weir 2 includes first layer thin-walled crest of weir 21, second Layer is laid bricks crest of weir 22, and it is small that first layer thin-walled crest of weir 21 bears pressure, can be used for mountain area, Close Tunnel, gully river dry season small flow Monitoring, and the second layer is laid bricks, 22 intensity of crest of weir is larger, biggish water pressure can be born, suitable for flood season flow flow when big Monitoring, compound rectangle crest of weir improve the scope of application on flow weir, provide guarantee for the accuracy of flow monitoring;The water Position monitoring device hole 5 is located at compound 2 upstream of rectangle crest of weir and for fixing a water level monitoring device 6, the water level monitoring Device 6 is in the reservoir that the compound rectangle flow weir rear is formed, a variety of data such as monitoring water level, water temperature, conductivity, no Personal monitoring is needed, a large amount of human cost can be saved, flow is calculated using the SEA LEVEL VARIATION of monitoring, can be obtained accurate Data on flows provides reliably foundation for investigation hydrogeological in engineering construction.
Further, the first layer thin-walled crest of weir 21 forms thin-walled crest of weir using stainless steel plate 23.The stainless steel plate With a thickness of 3mm~5mm, preferably 4mm;The second layer lay bricks crest of weir with a thickness of 9cm~11cm, preferably 10cm.
Further, stainless steel tube 7 is buried in the water level monitoring device hole 5, on the pipe shaft of the stainless steel tube 7 uniformly Aperture 71 is set, the water level monitoring device 6 is installed in the stainless steel tube 7.The water level monitoring is installed in stainless steel tube 7 Device 6 can effectively protect the water level monitoring device 6;Aperture 71 on the pipe shaft of stainless steel tube 7 can guarantee in stainless steel tube 7 Water level it is consistent with the water level in the reservoir that flow weir rear is formed, guaranteed water level monitoring device 6 monitor water level accuracy.
Further, the outer diameter of the stainless steel tube 71 is 5cm, wall thickness 4mm;The water level monitoring device 8 monitors step-length For 5min.For the precision of water level monitoring up to 1mm, the variation by monitoring water level calculates flow, directly can read water level in field Monitoring device 6 measures relevant data, so that the monitoring data of flow are more accurate in time.
Further, the flow on the compound rectangle flow weir is according to water level H before weir and maximum weir crest height h1Size It is calculated using different formulas, water level H is less than maximum weir crest height h before the weir1Flow is calculated using formula (1), before the weir Water level H is greater than maximum weir crest height h1Flow is calculated using formula (2);
Wherein:Q is flow, m3/s;M is discharge coefficient;B1For the width of first layer thin-walled crest of weir, m;B2For second layer block The width of brick crest of weir, m;G is acceleration of gravity;H is water level before weir, m;P1For the corresponding upstream the little Yan bank of first layer thin-walled crest of weir Height, m;h1For maximum weir crest height, m;P2High, the m for the second layer corresponding upstream the great Yan bank of crest of weir of laying bricks.According to water level before weir Height using different formulas calculate flow, can accurately measure gully, river, small stream water hour in dry season flow and the stream in flood season Amount.
The embodiment of the invention also provides a kind of construction methods of compound rectangular weir for monitoring mountain area stream water flow, including Following steps:
(1) weir body is divided into three parts, respectively left side weir body 1, compound rectangle crest of weir 2, right side weir body 3, it is right in riverbed 4 Plank 5 is placed in side, flexible drainage water-separating film 5 is laid on plank 4, water flow is led to the right side in riverbed 4, and seal water-separating film 5 with The junction in riverbed 4;Flexible drainage water-separating film 5 is laid on plank 4 can prevent water flow from infiltrating into 4 left side of riverbed from plank 5, protect It demonstrate,proves and is in anhydrous state on the left of riverbed 4, flexibility drainage water-separating film 5 can be mobile with water (flow) direction, guarantees the smooth of water flow;
(2) left side weir body 1 is built after drying up on the left of riverbed 4, the substrate of left side weir body 1 is armored concrete knot Structure is built on the basement rock in riverbed 4, and weir body is formed using riverbed cobble blended cement mortar injection;The base of concrete structure Bottom ensure that the stability of weir body, weir body are gathered materials on the spot using riverbed cobble and cement mortar mixed perfusion, save material cost;
(3) compound rectangle crest of weir 2 is built close to left side weir body 1, the compound rectangle crest of weir 2 includes two layers, under Up it is followed successively by first layer thin-walled crest of weir 21, the second layer is laid bricks crest of weir 22;The substrate 6 of the compound rectangle crest of weir 3 is mixed for reinforcing bar Xtah Crude Clay structure is built on the basement rock in riverbed 2, and drill on 2 basement rock of riverbed placement reinforcing bar and template when base low 6 is built, and The stainless steel plate is installed at the first layer thin-walled crest of weir 21, concrete is carried out and builds bottom;The form removal after concrete setting; Compound rectangle crest of weir 2 be convenient for mountain area river, small stream, ditch water flow different times flow monitoring;
(4) after left side weir body 1, compound rectangle crest of weir 2 are solid, in water flow upstream close to the compound rectangle crest of weir The water level monitoring device hole of fixed water level monitoring device is dug at 2, then by the right side of riverbed 4 plank 3 and is laid with thereon Flexibility drainage water-separating film 5 is placed in 4 left side of riverbed, water flow is led to 4 left side of riverbed, and seal water-separating film 5 and 4 junction of riverbed;
(5) right side weir body 3 is built after drying up on the right side of riverbed 4, the substrate of right side weir body 3 is armored concrete knot Structure is built on riverbed basement rock, and weir body is formed using riverbed cobble blended cement mortar injection;
(6) after right side weir body 3 is solid, the plank 3 and water-separating film 5 are taken out;Water flow is in the compound rectangular weir It is flowed out in mouth 2.
Herein, the nouns of locality such as related front, rear, top, and bottom are to be located in figure with components in attached drawing and zero Part mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that the noun of locality Use should not limit the claimed range of the application.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (6)

1. it is a kind of monitor mountain area stream water flow compound rectangle flow weir, characterized in that including left side weir body, right side weir body, Substrate, water level monitoring device hole;Left side weir body and right side weir body are symmetrical structure, and left side weir body includes close to stream The rectangular configuration of bank and in stepped rectangular configuration;Left side weir body, right side weir body and substrate form compound rectangle crest of weir, The compound rectangle crest of weir includes that first layer thin-walled crest of weir, the second layer are laid bricks crest of weir, and the water level monitoring device hole is located at described Compound rectangle crest of weir upstream simultaneously is used to fix a water level monitoring device.
2. a kind of compound rectangle flow weir for monitoring mountain area stream water flow according to claim 1, characterized in that described First layer thin-walled crest of weir is fabricated to thin-walled crest of weir using stainless steel plate.
3. a kind of compound rectangle flow weir for monitoring mountain area stream water flow according to claim 2, characterized in that described Stainless steel plate with a thickness of 3mm~5mm;The second layer lay bricks crest of weir with a thickness of 9cm~11cm.
4. a kind of compound rectangle flow weir for monitoring mountain area stream water flow according to claim 1, characterized in that described Stainless steel tube is buried in water level monitoring device hole, is uniformly arranged aperture on the pipe shaft of the stainless steel tube, in the stainless steel tube The water level monitoring device is installed.
5. a kind of compound rectangle flow weir for monitoring mountain area stream water flow according to claim 4, characterized in that described The outer diameter of stainless steel tube is 5cm, wall thickness 4mm;The water level monitoring device monitoring step-length is 5min, the precision 1mm of water level monitoring.
6. a kind of compound rectangle flow weir for monitoring mountain area stream water flow according to claim 1, characterized in that described The flow on compound rectangle flow weir is calculated according to the size of water level before weir and maximum weir crest height using different formulas, before the weir Water level is less than maximum weir crest height and calculates flow using formula (1), and water level uses formula greater than maximum weir crest height before the weir (2) flow is calculated;
Wherein:Q is flow, and unit is per cubic meter per second;M is discharge coefficient;B1First layer for the compound rectangle crest of weir is thin The width of wall crest of weir, unit are rice;B2It lays bricks the width of crest of weir for the second layer of the compound rectangle crest of weir, unit is rice;G is Acceleration of gravity;H is water level before weir, and unit is rice;P1First layer thin-walled crest of weir for the compound rectangle crest of weir is corresponding small Weir upstream bank is high, and unit is rice;h1For maximum weir crest height, unit is rice;P2The second layer for the compound rectangle crest of weir is laid bricks The corresponding upstream the great Yan bank of crest of weir is high, and unit is rice.
CN201810555765.XA 2018-05-31 2018-05-31 Compound rectangular flow weir for monitoring water flow of mountain ditch Active CN108844588B (en)

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