CN205875092U - Arc foot rectangular cross section simple beam formula aqueduct - Google Patents
Arc foot rectangular cross section simple beam formula aqueduct Download PDFInfo
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- CN205875092U CN205875092U CN201620860732.2U CN201620860732U CN205875092U CN 205875092 U CN205875092 U CN 205875092U CN 201620860732 U CN201620860732 U CN 201620860732U CN 205875092 U CN205875092 U CN 205875092U
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Abstract
The utility model discloses an arc foot rectangular cross section simple beam formula aqueduct, the groove body that includes the thin wall prestressed concrete structure that constitutes by tank bottom and left and right straight wall, the tank bottom is planar structure, left and right straight wall bottom and tank bottom both ends pass through the circular arc section be connected as an organic whole left and right straight wall top is provided with a left side, the right cantilever edge of a wing to the inboard level extension of groove body, be provided with many pull rods perpendicularly along groove body length direction interval between a left side, the right cantilever edge of a wing. The utility model has the advantages of the geometry of aqueduct and shape are between U -shaped and rectangle, and base angle design between straight wall and tank bottom is small circular arc, and the section design of tank bottom is flat section, possess the advantage of U -shaped and rectangle aqueduct so simultaneously, and the flat section in bottom the arranging of bottom exhaust and prestressing tendons when more being favorable to groove body concrete placement.
Description
Technical field
This utility model relates to hydraulic engineering--water delivery aqueduct upper slot body structure, and especially relate to a kind of arc foot rectangle and cut
Face freely-supported beam aqueduct.
Background technology
China belongs to the country that water resource is the poorest, and earth's surface available fresh water skewness weighs.Along with city size
Increase, the domestic water of most large-and-medium size cities residents can not get ensureing.Simultaneously as China is traditional agricultural country,
There is breakage in the water conservancy irrigation engineering being established in the 80-90 age in last century, needs reconstruction badly or reinforces.For solving city domestic water
And agricultural irrigation water, need remote water delivery or water transfer, if canal for water conveyance crosses over the low lying areas such as river, need to build
Water in a canal conveying is crossed the river by aqueduct.As Route Tao Cha to Lushan section general main canal is disposed with 7 beam aqueduct, design
Flow 350-320m3/ s, enlargement discharge 420 ~ 380m3/ s, load is huge.For reducing the aqueduct bottom buttress shadow to river course flood
Ringing, and guarantee the head room bottom aqueduct, the aqueduct of Route mainly has U-shaped analysis on aqueduct structure and rectangle aqueduct
Two kinds of forms of structure, span is 30m or 40m.
Freely-supported beam aqueduct have stress clearly, easy construction, malformation is the most unfettered and temperature influence relatively
The advantage such as little, is extensively applied in multiple engineering projects.Freely-supported beam aqueduct presses the combining form of water delivery and load-carrying members,
Load-bearing it is divided into again to separate beam aqueduct with water delivery one beam aqueduct and load-bearing with water delivery.Integral structure not only load-bearing but also undertake defeated
Water, stock utilization is high, same to span, with under loading condition, and integral structure superstructure work amount relatively the latter saves, but groove body is made
Unfavorable to anti-crack and anti-seepage for tension bottom longitudinal stress beam body.Separate type structure grooves body the most directly bears longitudinal load, to longitudinal direction
Anti-crack and anti-seepage is favourable, but there is material and can not make full use of problem.
Load-bearing mainly has U-shaped aqueduct, rectangle aqueduct and three kinds of structures of box groove with water delivery one beam aqueduct.Channel section
Concentration that aqueduct attractive appearance, flow condition are good, upstream face is the most unstressed.Rectangular cross section analysis on aqueduct structure stress is simple, construction letter
Just, but bottom rectangular cross section, easily there is stress concentration phenomenon in corner point, compared with channel section, and the rectangle aqueduct of identical span relatively U
Shape aqueduct weight.Though box-shaped groove top can as traffic aisle, but due to top seal, be unfavorable for ventilating, runtime internal-external temperature difference
Greatly, and top seal is unfavorable to later stage operational management, and with the box-shaped groove relatively rectangle aqueduct of span, U-shaped aqueduct weight.
In conjunction with aqueduct project HYDRODYNAMIC CONDITION RELATING TO, import and export that open channel is generally rectangular cross-section or inverted trapezoidal, it is contemplated that the water surface connects, and needs
Will arrange transition in import and export, compared with the aqueduct of square-section, the depth of water of U-shaped aqueduct is bigger.Reconstruction for old engineering
Project, the elevation of aqueduct two ends channel base plate fixes, and gross head difference is fixed, and according to the U-shaped aqueduct of good looking appearance, then aqueduct enters
Outlet Bottom Altitude is below former channel floor elevation, can form Sediment Siltation bottom aqueduct.
Summary of the invention
The purpose of this utility model is to provide a kind of dash to cross with the arc foot square-section freely-supported beam type of stress integral type
Groove, this structure aqueduct can solve rectangle aqueduct from great, higher, the bottom right angle stress of investment is concentrated, profile is the most attractive in appearance
Shortcoming；U-shaped aqueduct can also be solved and import and export transition abatement conveyance capacity, water surface curve less continuous print shortcoming.
For achieving the above object, this utility model can take following technical proposals:
Arc foot square-section described in the utility model freely-supported beam aqueduct, including be made up of bottom land and left and right straight wall
The groove body of thin-walled prestressed reinforced concrete construction, described bottom land is planar structure, passes through with bottom land two ends bottom described left and right straight wall
Arc section connects as one, and horizontal-extending inside groove body at described left and right straight wall top is provided with the left and right cantilever edge of a wing, institute
State, between the left and right cantilever edge of a wing, groove body length direction interval vertical is provided with many pull bars.
The width of described groove body, more than the degree of depth of groove body, forms wide shallow aqueduct.
It is arranged at intervals with inside and outside two-layer spacer bar in described bottom land, left and right straight wall and the left and right cantilever edge of a wing；Described groove
It is arranged at intervals with many prestress wires along its groove body length direction at the end.
The anchorage part being separately positioned on the described prestress wire of described bottom land two ends anchoring includes being stacked together and carrying
Having anchor plate and the anchoring backing plate of anchor hole, described prestress wire is worn successively from the anchor hole of anchoring backing plate and anchor plate
It is connected as a single entity by intermediate plate after going out.
The thickness of described bottom land is more than the thickness of left and right straight wall.
The bottom land outside at described groove body two ends is extended concrete bearing, is embedded with bearing in described concrete bearing
Steel plate.
The utility model has the advantage of the physical dimension of aqueduct and shape between U-shaped and rectangle, straight wall and bottom land
Between base angle be designed as small arc-shaped, the Section Design of bottom land is flat section, the advantage being so provided simultaneously with U-shaped and rectangle aqueduct, and
The flat section in bottom is more beneficial for base bleed and the layout of presstressed reinforcing steel during groove body concreting.Specifically, this utility model
Have the beneficial effect that following some:
1, this utility model is rectangle arc foot section aqueduct body, compared with rectangle aqueduct, have groove body deadweight less, throw
Provide low advantage, and solve the problem that rectangle aqueduct bottom right angle stress is concentrated.
2, this utility model is compared with U-shaped aqueduct, has the feature of U-shaped aqueduct good looking appearance, imports and exports transition build
Little, conveyance capacity abatement is less.And arc foot rectangle may be designed as wide shallow, and the depth of water is shallower compared with U-shaped, it is possible to increase head and
Flow velocity, prevents aqueduct bottom sediment from depositing.
3, arrangement prestress steel strand wires bottom this utility model groove body, every steel strand wires can be constructed by identical stress tension
Relatively easy and be easily controlled.And U-shaped aqueduct prestressing force steel strand wires are arranged along bottom circular arc, the steel strand prestress of bottommost is
Greatly, upwards successively decrease along circular arc.Decremented data determines relative difficulty, and execute man-hour requirement stretch-draw repeatedly could be with design load phase
Symbol.
Accompanying drawing explanation
Fig. 1 is plan structure schematic diagram of the present utility model.
Fig. 2 is the A-A direction view of Fig. 1.
Fig. 3 is the B-B direction view of Fig. 1.
Fig. 4 is the C-C direction view in Fig. 1 before concrete cast.
Fig. 5 is the P portion enlarged drawing in Fig. 1.
Detailed description of the invention
As Figure 1-5, arc foot square-section described in the utility model freely-supported beam aqueduct, including by bottom land 1 and a left side
The groove body of the thin-walled prestressed reinforced concrete construction of straight wall 2, right straight wall 3 composition, bottom land 1 is planar structure, left straight wall 2 and right straight wall
The bottom of 3 is connected as one by arc section with bottom land 1 two ends, makes the section physical dimension of aqueduct Transverse to the flow direction form the end
The rectangular configuration of portion's circular arc chamfering；During practice of construction, the ratio of width to height of aqueduct needs to consider aqueduct size, flow velocity, span etc.
Parameter, analyzes through structure stress optimization and determines, generally, the width of groove body is greater than the degree of depth of groove body, forms width
Shallow structure, the most both can increase effective head, increases flow velocity, can reduce again section in the case of equal carrying capacity
Size, reduction aqueduct deadweight, reduce investment.It is provided with a left side the top of left straight wall 2 and right straight wall 3 is horizontal-extending inside groove body
The cantilever edge of a wing 4 and the right cantilever edge of a wing 5, also serve as manway, along groove body length side between the left cantilever edge of a wing 4 and the right cantilever edge of a wing 5
Interval vertical is provided with many pull bars 6.
Owing to arc foot square-section of the present utility model freely-supported beam aqueduct is dash and stress integral type aqueduct, in deadweight
With under water delivery state, aqueduct top compression chord, bottom tension stress.For guarantee aqueduct body not because of tension produce crack,
The bottom land 1 of aqueduct, left straight wall 2 and right straight wall 3 and and the left cantilever edge of a wing 4 and the right cantilever edge of a wing 5 in be arranged at intervals with inside and outside two
Layer spacer bar 7；It is arranged at intervals with many prestress wires 8 along its groove body length direction in bottom land 1, during practice of construction,
Steel strand wires 8 can be arranged between two-layer spacer bar (as shown in Figure 4), it is also possible to be arranged on above two-layer spacer bar (as
Shown in Fig. 3), so under peak load compound action, it is ensured that aqueduct inwall occurs without tension.For ease of prestress steel twist
The layout of line 8, the thickness of the bottom land 1 of aqueduct may be slightly larger than left straight wall 2 and the thickness of right straight wall 3.
The anchorage part being separately positioned on bottom land two ends anchoring prestress steel strand wires 8 includes being stacked together and with anchor hole
Anchor plate 9 and anchoring backing plate 10, after prestress wire 8 passes successively from the anchor hole of anchoring backing plate 10 and anchor plate 9
It is connected as a single entity by intermediate plate 11, after prestress wire 8 stretch-draw is required to satisfied design, anchorage part second stage concrete is sealed
Stifled, as shown in Figure 5.
The bottom land outside at groove body two ends of the present utility model is extended concrete bearing 12, buries in concrete bearing 12
It is provided with bearing steel plate 13.
Claims (6)
1. an arc foot square-section freely-supported beam aqueduct, pre-including the thin-walled being made up of bottom land (1) and left and right straight wall (2,3)
The groove body of prestressed concrete structure, it is characterised in that: described bottom land (1) is planar structure, described left and right straight wall (2,3) bottom
Connected as one by arc section with bottom land (1) two ends, horizontal-extending inside groove body at described left and right straight wall (2,3) top
It is provided with the left and right cantilever edge of a wing (4,5), arranges along groove body length direction interval vertical between the described left and right cantilever edge of a wing (4,5)
There are many pull bars (6).
Arc foot square-section the most according to claim 1 freely-supported beam aqueduct, it is characterised in that: the width of described groove body is big
The degree of depth in groove body.
Arc foot square-section the most according to claim 1 and 2 freely-supported beam aqueduct, it is characterised in that: described bottom land (1),
It is arranged at intervals with inside and outside two-layer spacer bar in left and right straight wall (2,3) and the left and right cantilever edge of a wing, the left and right cantilever edge of a wing (4,5)
(7)；It is arranged at intervals with many prestress wires (8) along its groove body length direction in described bottom land (1).
Arc foot square-section the most according to claim 3 freely-supported beam aqueduct, it is characterised in that: it is separately positioned on described groove
Two ends, the end anchor the anchorage part of described prestress wire and include being stacked together and with the anchor plate (9) of anchor hole and anchoring
Backing plate (10), described prestress wire (8) passes through after passing from the anchor hole of anchoring backing plate (10) and anchor plate (9) successively
Intermediate plate (11) is connected as a single entity.
Arc foot square-section the most according to claim 3 freely-supported beam aqueduct, it is characterised in that: the thickness of described bottom land (1)
Degree is more than the thickness of left and right straight wall (2,3).
Arc foot square-section the most according to claim 1 freely-supported beam aqueduct, it is characterised in that: the groove at described groove body two ends
Outside, the end is extended concrete bearing (12), is embedded with bearing steel plate (13) in described concrete bearing (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620860732.2U CN205875092U (en) | 2016-08-10 | 2016-08-10 | Arc foot rectangular cross section simple beam formula aqueduct |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620860732.2U CN205875092U (en) | 2016-08-10 | 2016-08-10 | Arc foot rectangular cross section simple beam formula aqueduct |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313405A (en) * | 2017-06-13 | 2017-11-03 | 深圳前海特辰科技有限公司 | A kind of method for reducing aqueduct crackle |
| CN109797716A (en) * | 2019-02-26 | 2019-05-24 | 清华大学 | A kind of aqueduct and its construction method of antiseep |
| CN110725282A (en) * | 2019-09-04 | 2020-01-24 | 清华大学 | Structure and construction method of a steel-concrete composite structure aqueduct |
| CN112593529A (en) * | 2020-12-08 | 2021-04-02 | 河北省水利工程局 | Construction method of thin-wall prestressed concrete aqueduct |
| CN115094744A (en) * | 2022-07-22 | 2022-09-23 | 长江勘测规划设计研究有限责任公司 | An aqueduct structure for improving the flow capacity of large aqueducts |
-
2016
- 2016-08-10 CN CN201620860732.2U patent/CN205875092U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313405A (en) * | 2017-06-13 | 2017-11-03 | 深圳前海特辰科技有限公司 | A kind of method for reducing aqueduct crackle |
| CN109797716A (en) * | 2019-02-26 | 2019-05-24 | 清华大学 | A kind of aqueduct and its construction method of antiseep |
| CN110725282A (en) * | 2019-09-04 | 2020-01-24 | 清华大学 | Structure and construction method of a steel-concrete composite structure aqueduct |
| CN112593529A (en) * | 2020-12-08 | 2021-04-02 | 河北省水利工程局 | Construction method of thin-wall prestressed concrete aqueduct |
| CN115094744A (en) * | 2022-07-22 | 2022-09-23 | 长江勘测规划设计研究有限责任公司 | An aqueduct structure for improving the flow capacity of large aqueducts |
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