CN116446344B - Large-span combined aqueduct and construction method thereof - Google Patents
Large-span combined aqueduct and construction method thereof Download PDFInfo
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- CN116446344B CN116446344B CN202310707405.8A CN202310707405A CN116446344B CN 116446344 B CN116446344 B CN 116446344B CN 202310707405 A CN202310707405 A CN 202310707405A CN 116446344 B CN116446344 B CN 116446344B
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- 238000010276 construction Methods 0.000 title claims abstract description 16
- 239000004567 concrete Substances 0.000 claims abstract description 95
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 77
- 230000000903 blocking effect Effects 0.000 claims description 28
- 239000002131 composite material Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 210000005056 cell body Anatomy 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D18/00—Bridges specially adapted for particular applications or functions not provided for elsewhere, e.g. aqueducts, bridges for supporting pipe-lines
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a large-span combined aqueduct and a construction method thereof, and relates to the technical field of hydraulic engineering. The large-span combined aqueduct comprises a concrete tank body and a bottom plate assembly; the concrete tank body is provided with a navigation tank; the bottom plate assembly comprises a supporting plate and a bottom plate, the bottom plate and the bottom wall of the concrete tank body are arranged at intervals in parallel along the vertical direction, and the supporting plate is positioned between the concrete tank body and the bottom plate and is respectively connected with the bottom wall of the bottom plate and the bottom wall of the concrete tank body; the backup pad sets up to the steel sheet, and the bottom plate sets up to steel sheet or concrete structure. The large-span combined aqueduct solves the technical problem that the navigation aqueduct and the high pier large-span aqueduct in the prior art are uneconomical.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering, in particular to a large-span combined aqueduct and a construction method thereof.
Background
The large-scale aqueduct is widely applied to water transportation projects and mountain area long-distance water diversion projects, the navigation aqueduct is often used in the water transportation projects, and the high pier long-span aqueduct is often used in the mountain area long-distance water diversion projects.
The navigation aqueduct is a hydraulic building crossing a river or a deep valley, and the navigation aqueduct adopts a small-span simply supported structure, so that the navigation aqueduct is suitable for the condition of small pier height; if the continuous steel structure of the prestressed concrete with the large span is designed, the problems of small water head, larger dead weight load of the aqueduct than water load and uneconomical last exist.
The high pier large-span aqueduct can span the deep mountain canyon, and the upper box body is closed, so that the ship cannot pass through; in addition, the high pier large-span aqueduct structure has a large self-weight and exceeds the water load effect, so that the problem of uneconomical production exists.
Disclosure of Invention
The invention aims to provide a large-span combined aqueduct and a construction method thereof, so as to solve the technical problem that the navigation aqueduct and the high pier large-span aqueduct in the prior art are uneconomical.
In order to solve the problems, the technical scheme provided by the invention is as follows:
in a first aspect, the present invention provides a large-span composite aqueduct comprising a concrete tank body and a floor assembly;
the concrete tank body is provided with a navigation tank;
the bottom plate assembly comprises a supporting plate and a bottom plate, the bottom plate and the bottom wall of the concrete tank body are arranged at intervals in parallel along the vertical direction, and the supporting plate is positioned between the concrete tank body and the bottom plate and is respectively connected with the bottom plate and the bottom wall of the concrete tank body;
the backup pad sets up to the steel sheet, the bottom plate sets up to steel sheet or concrete structure.
Further, a plurality of support plates are arranged, and the plurality of support plates are arranged at intervals in parallel along the horizontal direction.
Still further, when the bottom plate sets up to the steel sheet, two adjacent install a plurality of bracing pieces between the backup pad, a plurality of bracing pieces are followed the extending direction interval distribution of concrete cell body, and a plurality of bracing pieces all one end with the diapire of concrete cell body is connected, the other end with the bottom plate is connected, a plurality of the bracing pieces are contained angle setting each other.
Still further, when the bottom plate is provided as a concrete structure, the support plate is provided as a corrugated steel web.
Further, the concrete tank body comprises a top plate and two water retaining side walls;
the top of the top plate is provided with the water retaining side wall, and the bottom of the top plate is connected with the supporting plate;
and the navigation groove is formed between the top plate and the two water retaining side walls.
Still further, the large-span combined aqueduct also comprises a supporting component, wherein the supporting component is installed on the top plate and is respectively connected with the side wall of the water retaining side wall and the bottom plate so as to improve the stability of the water retaining side wall.
Still further, the supporting component comprises a first supporting rod, one end of the first supporting rod is connected with the top plate, the other end of the first supporting rod is connected with the side wall of the water retaining side wall, and the first supporting rod and the top plate are arranged in an included angle.
Still further, the supporting component also comprises a second supporting rod, one end of the second supporting rod is connected with the top plate, and the other end of the second supporting rod is connected with the bottom plate and is arranged at an included angle with the top plate.
Still further, the support assembly further comprises stringers and ties;
the pull rod is arranged in the top plate, the length direction of the pull rod is arranged along the horizontal direction, and the two ends of the pull rod are connected with the longitudinal beams;
the longitudinal beam is arranged on the side wall of the top plate, and the length direction of the longitudinal beam is arranged along the extending direction of the concrete groove body;
one end of the first stay bar is connected with the longitudinal beam, and the other end of the first stay bar is connected with the side wall of the water retaining side wall;
one end of the second stay bar is connected with the longitudinal beam, and the other end of the second stay bar is connected with the side wall of the bottom plate.
In a second aspect, the present invention provides a construction method for manufacturing the large-span composite aqueduct according to any one of the above, comprising:
constructing a pier top pouring starting beam section;
installing a hanging basket and assembling a supporting plate;
when the bottom plate is set to be a concrete structure, the supporting plate is used as a support to pour the top plate and the bottom plate, and meanwhile, the installation of the longitudinal beam and the pull rod is completed;
installing a water retaining side wall;
and installing a stay bar.
In summary, the technical effects achieved by the invention are analyzed as follows:
the large-span combined aqueduct provided by the invention comprises a concrete tank body and a bottom plate assembly; the concrete tank body is provided with a navigation tank; the bottom plate assembly comprises a supporting plate and a bottom plate, the bottom plate and the bottom wall of the concrete tank body are arranged at intervals in parallel along the vertical direction, and the supporting plate is positioned between the concrete tank body and the bottom plate and is respectively connected with the bottom wall of the bottom plate and the bottom wall of the concrete tank body; the backup pad sets up to the steel sheet, and the bottom plate sets up to steel sheet or concrete structure. The concrete tank body is provided with a navigation groove and can be used as a navigation aqueduct for passing a ship. The concrete trough body is formed by pouring concrete, the supporting plate is arranged as a steel plate, the bottom plate is arranged as a steel plate or a concrete structure, and the steel plates with the same strength are heavier than the concrete structure, so that the dead weight of the large-span combined aqueduct is reduced, the rigidity is increased, the dead weight load of the large-span combined aqueduct is reduced, and the engineering quantity is reduced; the combination form of the steel plate and the concrete structure is economical and reasonable, and the advantages of the steel and the concrete can be exerted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a large-span composite aqueduct according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a large-span combined aqueduct according to an embodiment of the present invention;
FIG. 3 is a second cross-sectional view of a large-span composite aqueduct according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram II of a large-span combined aqueduct according to an embodiment of the present invention;
FIG. 5 is a simplified calculation of a water retaining sidewall in a prior art aqueduct;
FIG. 6 is a schematic diagram of calculation of a water retaining sidewall in a large-span composite aqueduct provided by an embodiment of the present invention;
FIG. 7 is a graph of bending moment of a water retaining sidewall in a prior art aqueduct considering only water pressure;
FIG. 8 is a bending moment diagram of a water retaining side wall in a large-span combined aqueduct provided by an embodiment of the present invention only considering the action of water pressure;
FIG. 9 is a bending moment diagram of a water retaining sidewall in a prior art aqueduct under the combined consideration of water pressure and ship impact load;
fig. 10 is a bending moment diagram of a water retaining side wall in a large-span combined aqueduct provided by the embodiment of the invention under the comprehensive consideration of water pressure and ship impact load.
Icon:
100-concrete tank body; 110-top plate; 120-water retaining side walls;
200-a base plate assembly; 210-a support plate; 220-a bottom plate; 230-supporting rods;
300-a support assembly; 310-a first stay; 320-a second stay; 330-stringers; 340-a pull rod;
a-vertical direction; b-horizontal direction.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Example 1
The large-span combined aqueduct provided by the embodiment of the invention comprises a concrete groove body 100 and a bottom plate assembly 200; the concrete tank 100 has a navigation slot; the bottom plate assembly 200 comprises a supporting plate 210 and a bottom plate 220, wherein the bottom plate 220 and the bottom wall of the concrete tank body 100 are arranged at intervals in parallel along the vertical direction a, and the supporting plate 210 is positioned between the concrete tank body 100 and the bottom plate 220 and is respectively connected with the bottom plate 220 and the bottom wall of the concrete tank body 100; the support plate 210 is provided as a steel plate, and the bottom plate 220 is provided as a steel plate or a concrete structure. The concrete tank body 100 has a navigation groove, which can be used as a navigation aqueduct for passing a ship. The concrete tank body 100 is formed by pouring concrete, the supporting plate 210 is provided with a steel plate, the bottom plate 220 is provided with a steel plate or a concrete structure, and the steel plates with the same strength are lighter than the concrete structure, so that the dead weight of the large-span combined aqueduct is reduced, the rigidity is increased, the dead weight load of the large-span combined aqueduct is reduced, and the engineering quantity is reduced; the combination form of the steel plate and the concrete structure is economical and reasonable, and the advantages of the steel and the concrete can be exerted.
The structure and shape of the large-span composite aqueduct are described in detail below:
in an alternative of the embodiment of the present invention, a plurality of support plates 210 are provided, and a plurality of support plates 210 are arranged in parallel at intervals along the horizontal direction b.
Specifically, referring to fig. 1, when the bottom plate 220 is provided in a concrete structure, the support plates 210 are provided in three, and the three support plates 210 are disposed in parallel at intervals along the horizontal direction b (the width direction of the bottom plate 220). Referring to fig. 3, when the bottom plate 220 is provided as a steel plate, two support plates 210 are provided, and the two support plates 210 are disposed in parallel at intervals in the horizontal direction b and are connected to both sides of the bottom plate 220. Preferably, the support plate 210 is welded to the bottom plate 220.
The top of the support plate 210 is connected with the bottom wall of the concrete tank 100 to support the concrete tank 100; the support plates 210 are provided in plurality, so that the support force to the concrete tank body 100 is increased, and the stability of the large-span combined aqueduct is improved.
In an alternative embodiment of the present invention, when the bottom plate 220 is configured as a steel plate, a plurality of support rods 230 are installed between two adjacent support plates 210, the plurality of support rods 230 are distributed at intervals along the extending direction of the concrete tank body 100, one end of each support rod 230 is connected to the bottom wall of the concrete tank body 100, the other end is connected to the bottom plate 220, and the plurality of support rods 230 are disposed at an included angle with each other.
Specifically, referring to fig. 3, the plurality of support rods 230 are located between the two support plates 210, and one ends of the plurality of support rods 230 are connected with the middle portion of the bottom wall of the concrete tank 100, and the other ends of the plurality of support rods 230 are arranged in parallel along the horizontal direction b at intervals and are connected with the bottom plate 220, so that the plurality of support rods 230 are arranged at an included angle with each other, support the bottom wall of the concrete tank 100 from different directions, and improve the stability of the concrete tank 100. Further, the number and arrangement of the support rods 230 are set according to the actual requirements of the large-span composite aqueduct, and in particular, according to the width of the bottom plate 220.
The both ends of bracing piece 230 are connected with bottom plate 220 and concrete cell body 100 respectively, further support concrete cell body 100, have increased the support dynamics to concrete cell body 100, have improved the stability of long-span combination aqueduct.
In the alternative of the embodiment of the present invention, when the bottom plate 220 is provided as a concrete structure, the support plate 210 is provided as a corrugated steel web.
The supporting plate 210 is provided with a corrugated steel web, so that compared with a concrete web in the prior art, the supporting plate has obvious economic benefit and saves building materials; and weight is reduced. Specifically, the corrugated steel web improves the prestress efficiency and the structural performance: the corrugated steel web has small longitudinal rigidity and hardly resists axial force, so that the corrugated steel web is not resisted when prestress is introduced, and longitudinal prestress bundles can be intensively loaded on the concrete tank body 100 and the bottom plate 220, thereby effectively improving the prestress efficiency. The corrugated steel web improves the use efficiency of materials: the concrete tank body 100 and the bottom plate 220 are used for bending resistance, the corrugated steel web is used for shearing resistance, bending moment and shearing force are respectively borne by the concrete tank body 100, the bottom plate 220 and the corrugated steel web, and the stress distribution in the corrugated steel web is approximately uniform distribution pattern, so that the material is beneficial to play a role. The corrugated steel web improves the structural efficiency of the broken surface: the concrete is concentrated at the concrete tank 100 and the bottom plate 220, the radius of gyration is the maximum, and the structural efficiency of the section is improved. Dead weight is reduced, and shock resistance is good: the dead weight of the box girder adopting the corrugated steel web plate can be reduced to about 70% of that of a pure concrete structure. The wave-shaped steel web plate can reduce field operation and accelerate construction process: the corrugated steel web can reduce a large number of templates, brackets and concrete pouring projects, avoids complex processes of embedding pipelines in the concrete web, and can realize industrial production and site assembly construction, thereby accelerating construction process. The corrugated steel web avoids the problem of web cracking, and has good durability: the traditional prestressed concrete box bridge is affected by external force load, concrete shrinkage and creep, cracks often appear on the web, so that a series of problems such as weakening of the concrete section, corrosion of reinforcing steel bars, repair and reinforcement are caused, and the corrugated steel web cannot have the problems and has good durability.
In an alternative embodiment of the present invention, the concrete tank 100 includes a top plate 110 and two water blocking side walls 120; the top of the top plate 110 is provided with a water retaining side wall 120, and the bottom is connected with a supporting plate 210; a navigation groove is formed between the top plate 110 and the two water blocking side walls 120.
Specifically, referring to fig. 1 to 4, a navigation groove for navigation is formed between the top plate 110 and the two water blocking side walls 120. Further, the two water blocking side walls 120 are located inside the top plate 110, i.e. the side walls of the top plate 110 protrude from the outer walls of the water blocking side walls 120. Preferably, the water blocking side wall 120 and the top plate 110 are both of a concrete structure.
The roof 110 and the water blocking side wall 120 realize that the concrete tank body 100 has a navigation groove, so that the large-span combined aqueduct is suitable for navigation.
In an alternative scheme of the embodiment of the invention, the large-span combined aqueduct further comprises a supporting component 300, wherein the supporting component 300 is installed on the top plate 110 and is respectively connected with the side wall of the water retaining side wall 120 and the bottom plate 220 so as to improve the stability of the water retaining side wall 120.
Specifically, referring to fig. 1 and 3, the supporting component 300 is mounted on a side wall of the top plate 110, and two ends of the supporting component are respectively connected with a side wall of the water blocking side wall 120, which is away from the navigation slot, and a side wall of the bottom plate 220, so that the supporting component 300 is prevented from being located in the navigation slot, occupying an inner space of the navigation slot, and affecting navigation.
The supporting component 300 is mounted on the top plate 110 and is respectively connected with the side wall of the water blocking side wall 120 and the bottom plate 220; the top plate 110 is used for fixing the supporting component 300, and the supporting component 300 is used for supporting the water blocking side wall 120 and the bottom plate 220; the support assembly 300 is designed to have a triangular structure, and has strong stability, thereby improving the stability of the water blocking side wall 120.
In an alternative embodiment of the present invention, the supporting assembly 300 includes a first supporting rod 310, where one end of the first supporting rod 310 is connected to the top plate 110, and the other end of the first supporting rod is connected to the side wall of the water blocking side wall 120 and forms an included angle with the top plate 110.
Specifically, the first stay 310 is provided as a concrete-filled steel tube structure or a precast concrete structure. In this embodiment, referring to fig. 2 and 4, a plurality of first struts 310 are provided, and the plurality of first struts 310 are arranged at intervals in parallel along the extending direction of the navigation slot; the top end of each first stay 310 is connected to the sidewall of the water blocking sidewall 120, and the bottom end is connected to the top plate 110.
The conventional large-span aqueduct water retaining side wall 120 has a cantilever structure, and needs to increase the thickness of the wall body under the impact load action of a large ship, so that the problems of heavy weight, high manufacturing cost and unfavorable shock resistance exist. In this embodiment, two ends of the first stay bar 310 are respectively connected with the water blocking side wall 120 and the top plate 110, the first stay bar 310 supports the water blocking side wall 120, and converts the water blocking side wall 120 from a cantilever structure into a statically indeterminate simple beam; the first stay bar 310, the top plate 110 and the bottom plate 220 form a triangle, the triangle is stable, and the stability is known from the stability of the triangle, so that the stability of the water retaining side wall 120 is enhanced, the bottom bending moment of the water retaining side wall 120 is reduced, the size and the dead weight of the water retaining side wall 120 are reduced, and the earthquake resistance is improved.
In an alternative embodiment of the present invention, the support assembly 300 further includes a second stay 320, where one end of the second stay 320 is connected to the top plate 110, and the other end of the second stay 320 is connected to the bottom plate 220 and is disposed at an angle with respect to the top plate 110.
Specifically, referring to fig. 2 and 4, a plurality of second struts 320 are provided, and the plurality of second struts 320 are in one-to-one correspondence with the plurality of first struts 310. Further, the second stay 320 is provided as a concrete filled steel tube structure or a precast concrete structure.
The second stay 320, the top plate 110 and the bottom plate 220 form a triangle shape, enhancing the stability of the large-span composite aqueduct.
In an alternative embodiment of the present invention, the support assembly 300 further includes stringers 330 and ties 340; the stringers 330 are installed at the side walls of the top plate 110, and are provided along the extension direction of the concrete tank 100 in the length direction; the tie rods 340 are installed inside the top plate 110, and are disposed along the horizontal direction b in the length direction, and both ends thereof are connected to the corresponding side stringers 330, respectively. One end of the first stay bar 310 is connected with the longitudinal beam 330, and the other end is connected with the side wall of the water retaining side wall 120; one end of the second stay 320 is connected to the side member 330 and the other end is connected to the side wall of the bottom plate 220.
Specifically, the tie rods 340 are configured as a steel bar or a steel cable structure, and the tie rods 340 are provided in plurality, and the tie rods 340 are disposed in one-to-one correspondence with the first braces 310. In this embodiment, the first stay 310 and the pull rod 340 are disposed along the extension direction of the concrete tank 100 at a distance of 3 m. Further, the stringers 330 are configured as section steel, and are configured along the extension direction of the concrete tank 100.
Referring to fig. 5 and 6, fig. 5 is a schematic diagram of calculation of the water blocking side wall 120 of the aqueduct without the support assembly 300, and fig. 6 is a schematic diagram of calculation of the water blocking side wall 120 with the support assembly 300, wherein the value 70 is the ship impact load, and the lower triangle is the hydraulic load. When only the effect of water pressure is considered, please refer to fig. 7 and 8, fig. 7 is a bending moment diagram of the water blocking side wall 120 without the support assembly 300 under the effect of only water pressure, fig. 8 is a bending moment diagram of the water blocking side wall 120 without the support assembly 300 under the effect of only water pressure, the maximum bending moment without the support assembly 300 is 196kn x m and appears at the bottom of the water blocking side wall 120, the maximum bending moment with the support assembly 300 is 59kn x m and appears at the bottom of the water blocking side wall 120, and the maximum bending moment can be reduced by about 70% by the support assembly 300. When the water pressure and the ship impact force are considered comprehensively, please refer to fig. 9 and 10, fig. 9 is a bending moment diagram of the water blocking side wall 120 without the support assembly 300, fig. 10 is a bending moment diagram of the water blocking side wall 120 without the support assembly 300, the maximum bending moment of the support assembly 300 is 595kn x m and appears at the bottom of the water blocking side wall 120, the maximum bending moment of the support assembly 300 is 64kn x m and appears at the bottom of the water blocking side wall 120, and the maximum bending moment of the support assembly 300 can be reduced by about 90% by setting the support assembly 300, so that the effect is remarkable.
The first stay bar 310 and the second stay bar 320 are supported on the longitudinal beams 330, the longitudinal beams 330 on the left side and the right side are oppositely pulled through the pull rods 340, the first stay bar 310, the second stay bar 320 and the pull rods 340 are mutually involved, a self-balancing system is formed, and the whole load of the large-span combined aqueduct is not increased while the load effect of the water retaining side wall 120 is reduced. Compared with the prior art, under the same condition, the dead weight of the water retaining side wall 120 provided by the embodiment can be reduced to about 30% of that of the traditional cantilever structure; and, because concrete cell body 100 load is light, be favorable to the antidetonation, reduce the aqueduct lower part structure engineering volume in strong earthquake area.
The advantages of the large-span high tap combined aqueduct are described in detail below:
1. the aqueduct adopts a steel and concrete combined structure, can exert the respective advantages of the two materials, and has small dead weight, large rigidity and small construction engineering quantity;
2. the structure is small in size, high in rigidity and light in dead weight, and is suitable for a large-span aqueduct;
3. the supporting component 300, the top plate 110, the water retaining side wall 120 and the bottom plate 220 form a self-balancing stress system, so that the self-balancing stress system is economical and reasonable, the load effect of the water retaining side wall 120 is reduced, and meanwhile, the whole load of the aqueduct is not increased, so that the self-balancing stress system is suitable for a high-head aqueduct;
4. the supporting component 300 is utilized to reduce the load of the concrete tank body 100, thereby being beneficial to earthquake resistance and reducing the engineering quantity of the lower structure of the aqueduct in the strong earthquake region;
5. the concrete tank body 100 is provided with a navigation tank, so that the concrete tank body is suitable for large navigation aqueduct projects and mountain large diversion projects, and has economic advantages;
6. and the assembly type construction can be realized.
Example two
The construction method for manufacturing the large-span combined aqueduct described in the first embodiment of the invention comprises the following steps: constructing a pier top pouring starting beam section; installing a hanging basket and assembling a supporting plate 210; when the bottom plate 220 is set to a concrete structure, the support plate 210 is used as a support to pour the top plate 110 and the bottom plate 220, and the installation of the longitudinal beams 330 and the tie rods 340 is completed at the same time, when the bottom plate 220 is set to a steel plate, the support plate 210 is used as a support to pour the top plate 110 and the bottom plate 220 is installed, and the installation of the longitudinal beams 330 and the tie rods 340 is completed at the same time; installing a water blocking side wall 120; and installing a stay bar.
Specifically, in the embodiment, a cantilever cast-in-situ mounting method is adopted for construction, namely, after a starting beam section is cast on the pier top, a suspension casting hanging basket is assembled on the starting beam section, and the beam sections are cast in sequence in sections; side and mid-spans are closed.
And the cantilever installation method is adopted for construction, so that the construction period and the cost are reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (5)
1. A large span composite aqueduct comprising: a concrete tank (100) and a floor assembly (200);
the concrete tank body (100) is provided with a navigation tank;
the bottom plate assembly (200) comprises a supporting plate (210) and a bottom plate (220), wherein the bottom plate (220) and the bottom wall of the concrete tank body (100) are arranged at intervals in parallel along the vertical direction (a), and the supporting plate (210) is positioned between the concrete tank body (100) and the bottom plate (220) and is respectively connected with the bottom plate (220) and the bottom wall of the concrete tank body (100);
the supporting plate (210) is arranged as a steel plate, and the bottom plate (220) is arranged as a steel plate or a concrete structure;
the concrete tank body (100) comprises a top plate (110) and two water retaining side walls (120);
the top of the top plate (110) is provided with the water retaining side wall (120), and the bottom of the top plate is connected with the supporting plate (210);
the navigation groove is formed between the top plate (110) and the two water retaining side walls (120);
the large-span combined aqueduct further comprises a supporting component (300), wherein the supporting component (300) is installed on the top plate (110) and is respectively connected with the side wall of the water retaining side wall (120) and the bottom plate (220) so as to improve the stability of the water retaining side wall (120);
the supporting assembly (300) comprises a first supporting rod (310), one end of the first supporting rod (310) is connected with the top plate (110), and the other end of the first supporting rod is connected with the side wall of the water retaining side wall (120) and is arranged at an included angle with the top plate (110);
the supporting assembly (300) further comprises a second supporting rod (320), one end of the second supporting rod (320) is connected with the top plate (110), and the other end of the second supporting rod is connected with the bottom plate (220) and is arranged at an included angle with the top plate (110);
the support assembly (300) further comprises stringers (330) and tie rods (340);
the pull rod (340) is installed inside the top plate (110), the length direction is arranged along the horizontal direction (b), and the two ends of the pull rod are connected with the longitudinal beams (330);
the longitudinal beam (330) is mounted on the side wall of the top plate (110), and the length direction of the longitudinal beam is arranged along the extending direction of the concrete groove body (100);
one end of the first stay bar (310) is connected with the longitudinal beam (330), and the other end of the first stay bar is connected with the side wall of the water retaining side wall (120);
one end of the second brace rod (320) is connected with the longitudinal beam (330), and the other end of the second brace rod is connected with the side wall of the bottom plate (220).
2. The large-span composite aqueduct according to claim 1, characterized in that the support plates (210) are provided in plurality, and the plurality of support plates (210) are arranged at parallel intervals in the horizontal direction (b).
3. The large-span composite aqueduct according to claim 2, wherein when the bottom plate (220) is configured as a steel plate, a plurality of support rods (230) are installed between two adjacent support plates (210), the plurality of support rods (230) are distributed at intervals along the extending direction of the concrete tank body (100), and each of the plurality of support rods (230) has one end connected with the bottom wall of the concrete tank body (100) and the other end connected with the bottom plate (220), and the plurality of support rods (230) are disposed at an included angle with each other.
4. The large span modular aqueduct of claim 1, wherein the support plates (210) are provided as corrugated steel webs when the bottom plate (220) is provided as a concrete structure.
5. A construction method for manufacturing the large-span composite aqueduct according to any one of claims 1 to 4, comprising:
constructing a pier top pouring starting beam section;
installing a hanging basket and assembling a supporting plate (210);
when the bottom plate (220) is set to be a concrete structure, the supporting plate (210) is used for supporting the pouring top plate (110) and the bottom plate (220), the installation of the longitudinal beams (330) and the pull rods (340) is completed at the same time, and when the bottom plate (220) is set to be a steel plate, the supporting plate (210) is used for supporting the pouring top plate (110) and the bottom plate (220) is installed, and the installation of the longitudinal beams (330) and the pull rods (340) is completed at the same time;
installing a water blocking side wall (120);
and installing a stay bar.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235985Y (en) * | 1994-09-01 | 1996-09-25 | 武汉水利电力大学 | Large irrigation-work channel structure |
| CN212801431U (en) * | 2020-07-22 | 2021-03-26 | 安徽省交通规划设计研究总院股份有限公司 | Truss type navigation steel aqueduct with corrugated web plate |
| CN115341512A (en) * | 2022-08-16 | 2022-11-15 | 中国葛洲坝集团第一工程有限公司 | Channel aqueduct and preparation method thereof |
| CN115652868A (en) * | 2022-08-16 | 2023-01-31 | 中国葛洲坝集团第一工程有限公司 | Lightweight channel aqueduct and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235985Y (en) * | 1994-09-01 | 1996-09-25 | 武汉水利电力大学 | Large irrigation-work channel structure |
| CN212801431U (en) * | 2020-07-22 | 2021-03-26 | 安徽省交通规划设计研究总院股份有限公司 | Truss type navigation steel aqueduct with corrugated web plate |
| CN115341512A (en) * | 2022-08-16 | 2022-11-15 | 中国葛洲坝集团第一工程有限公司 | Channel aqueduct and preparation method thereof |
| CN115652868A (en) * | 2022-08-16 | 2023-01-31 | 中国葛洲坝集团第一工程有限公司 | Lightweight channel aqueduct and preparation method thereof |
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