CN113481824B - Simple bridge easy to construct - Google Patents
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- CN113481824B CN113481824B CN202110821264.3A CN202110821264A CN113481824B CN 113481824 B CN113481824 B CN 113481824B CN 202110821264 A CN202110821264 A CN 202110821264A CN 113481824 B CN113481824 B CN 113481824B
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- 238000010276 construction Methods 0.000 claims abstract description 11
- 239000011178 precast concrete Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000004567 concrete Substances 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
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- 239000007787 solid Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
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- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
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- 230000000737 periodic effect Effects 0.000 description 1
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Images
Classifications
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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
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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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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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
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/086—Drainage arrangements or devices
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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
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/103—Parapets, railings ; Guard barriers or road-bridges
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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
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The utility model relates to a simple and easy bridge of easily being under construction for erect between the river course two banks and can supply pedestrian or carrier to pass through, include: the first structure bodies are oppositely arranged on two sides of the river channel to form a supporting foundation; the two second structures are oppositely arranged and respectively combined on one side of the first structure, which is close to the center line of the river channel, and the two second structures and the first structure form a first supporting surface at the top; a plurality of pier structural bodies arranged between the two second structural bodies, wherein the plurality of pier structural bodies jointly form a second supporting surface positioned at the top of the pier structural bodies, and the second supporting surface is coplanar with the first supporting surface; a pavement member which is composed of a plurality of precast slabs and is respectively spliced and laid on the first supporting surface and the second supporting surface; wherein the first structure and/or the second structure are each independently constructed from one or more precast concrete members. The technical scheme of the invention has the beneficial effects of low cost and convenient construction.
Description
Technical Field
The invention relates to a building construction member, in particular to a simple bridge easy to construct.
Background
The bridge can be divided into a wood bridge, a stone bridge, a concrete bridge, a reinforced concrete bridge, a prestressed concrete bridge, a steel bridge, a combined beam bridge and the like according to building materials. In addition, there are bridges constructed with light concrete, aluminum alloy, glass fiber reinforced plastic and other building materials. The bridge constructed by adopting the lightweight concrete is mostly a simple bridge with small carrying capacity. For example, for rural areas where the breadth of China is large, especially for rural areas in southern areas, the construction is mostly based on mountains and water, and the construction significance of the simple bridge is huge. However, although the traditional bridge has a long history, the shape and the system can bear some cultural factors, the hidden structural danger of the traditional bridge is not negligible, and the traditional bridge usually occupies a large space. Therefore, the reconstruction is generally recommended for most rural simple bridges, except for some bridges which are excellent in design, firm in structure and quite representative in meaning and still have a reserved value. The method not only can greatly facilitate the lives of villagers, strengthen the communication between the villagers and the outside, but also is beneficial to the development of village economy. In consideration of cost factors, the existing simple bridge is mostly built by adopting light concrete prefabricated parts, steel prefabricated parts or glass fiber reinforced plastics and other building materials. The utility model discloses an emergency anticollision type bridge of simple and easy bridge is built fast to available railing in chinese patent application CN111778836A, including bridge body, fender rod, guard plate, lower breast board and linking pole, the spacing groove has been seted up on the bridge body, and the spacing inslot block connection has the stand pole, the screw connection in the spacing groove has the rubber pad, the last two-way threaded rod of installing of unable adjustment base, and two-way threaded rod rotate to be connected on the bridge body, the block is connected with the pinion rod on the stand pole, and the top screw connection of pinion rod has the fender rod, the meshing is connected with circular gear on the pinion rod, and circular gear welded fastening is on the fixed axle. However, in this solution, the main body of the bridge, i.e. the bridge body, is constructed as a single body, and the construction method is the same as that of other large bridges, that is, the bridge disclosed in this patent application is not practical and convenient to construct, and is easy to construct. It will also be appreciated that the construction costs are not inexpensive.
Disclosure of Invention
In view of the above problems in the prior art, the present invention aims to provide a simple bridge which is low in cost and easy to construct.
In order to achieve the above object, an aspect of the present invention provides a simple bridge easy to construct, for being erected between two banks of a river and allowing pedestrians or vehicles to pass through, the bridge comprising:
the first structure bodies are oppositely arranged at two sides of the river channel to form a supporting foundation;
the two second structures are oppositely arranged and respectively combined on one side of the first structure, which is close to the center line of the river channel, and the two second structures and the first structure form a first supporting surface at the top;
a plurality of pier structural bodies arranged between the two second structural bodies, wherein the plurality of pier structural bodies jointly form a second supporting surface positioned at the top of the pier structural bodies, and the second supporting surface is coplanar with the first supporting surface;
a pavement member which is composed of a plurality of precast slabs and is respectively spliced and laid on the first supporting surface and the second supporting surface;
wherein the first structure and/or the second structure are each independently constructed from one or more precast concrete members.
Preferably, the pavement member is provided with a side guard rail along a length direction thereof, and a separation guard rail is provided at a central position thereof, and the side guard rail and/or the separation guard rail is formed of a plurality of precast concrete members.
Preferably, the side underrun protection comprises at least a first member on the first support surface and a plurality of second members on the second support surface, the first and second members being connected by a rigid cross-bar extending through the first and second members.
Preferably, the pier structure below the second support surface is provided with a plurality of bridge seismic pedestals for supporting the road surface members.
Preferably, a water collecting tank is arranged between the plurality of bridge shockproof bases, a water recovery mechanism for collecting accumulated water on the road surface is arranged on the road surface component, and the water recovery mechanism is communicated with the water collecting tank.
Preferably, the water recovery mechanism includes a water falling well grate disposed on the road surface member, a water falling pipe connected to the water falling well grate, and a control valve disposed on the water collection tank, the water falling pipe is communicated to the water collection tank, and the water collection tank is further provided with a water outlet pipe controlled by the control valve.
Preferably, the top supporting surface of the first structure body is higher than the top supporting surface of the second structure body, and a height difference D is formed between the top supporting surface of the first structure body and the top supporting surface of the second structure body; and side filling members with L-shaped sections are arranged at positions, corresponding to the relative outer sides of the side guardrails, of the top supporting surfaces of the two second structural bodies in a relative mode, the supporting surfaces of the side filling members and the top supporting surface of the first structural body are coplanar and form the first supporting surface together, and the side guardrails are fixedly installed on the supporting surfaces of the side filling members.
Preferably, a plurality of connecting beams are provided between the plurality of pier structures along a longitudinal extension direction of the road surface member.
Preferably, the pier structure includes a hollow prefabricated shell and a concrete filling block inserted in the prefabricated shell.
Preferably, the first member is configured in a hexahedral shape having a bottom surface in a parallelogram shape and a top surface in a right trapezoid shape, and the second member is configured in a hexahedral shape having a bottom surface in a right trapezoid shape and a top surface in a rectangular shape.
The simple bridge easy to construct can be formed by means of prefabricated parts, and during construction, only two sides of a river channel need to be constructed in advance, so that the first parts are partially embedded into the river channel, and the second parts and the pier structural body are spliced. And finally, hoisting the pavement member and the guardrail member to form a simple bridge which is convenient for pedestrians, livestock or small-sized carriers to pass through. The technical scheme of the invention has the beneficial effects of low cost and convenient construction.
Drawings
Fig. 1 is a front view schematically illustrating a simple bridge according to the present invention.
Fig. 2 is a schematic top view of a simple bridge according to the present invention.
Fig. 3 isbase:Sub>A schematic sectional view taken along the linebase:Sub>A-base:Sub>A in fig. 2.
Fig. 4 is a schematic structural diagram of a three-dimensional mechanism of a simple bridge easy to construct according to the present invention.
Fig. 5 is a schematic bottom structure view of the simple bridge easy to construct according to the present invention.
Fig. 6 is a schematic structural view of another embodiment of the simple bridge according to the present invention, which is easy to construct.
Fig. 7 is a schematic structural view of the bridge earthquake-proof base of the simple bridge easy to construct according to the present invention.
The main reference numbers:
1-bridge body, 11-first structure body, 12-second structure body, 13-pier structure body, 14-bridge opening, 15-bridge shockproof base and 16-water collecting tank; 17-edge guardrail; 18-a water recovery mechanism, 19-an isolation guardrail and 131-a prefabricated shell; 132-a filler block; 133-a connecting beam; 151-a base; 152-a resilient member; 153-a piston member; 154-rigid backing plate; 155-top plate; 161-a housing chamber; 162-a water outlet pipe; 171-a first member; 172-a second member; 173-rigid cross-bar; 175-bottom member, 176-side filling member, 181-dewatering well grate, 182-control valve, 183-downpipe, 100-vehicle, 200-pavement member, 300-river course laying member, 301-tetrahedral support structure, 302-wedge support structure, 1531-caulking groove.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Various aspects and features of the present invention are described herein with reference to the accompanying drawings.
These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the attached drawings.
It should also be understood that, although the invention has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of the invention, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present invention will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
As shown in fig. 1 to 4, in one aspect, the present invention provides a simple bridge easy to construct, which is installed between two banks of a river and is used for pedestrians or vehicles 100 to pass through, and is particularly suitable for a section with a small traffic flow in a rural area and between rivers or ravines with low load requirements, so as to mainly facilitate the passage of pedestrians, livestock or small vehicles with a small flow, in the present invention, all components can be formed by splicing concrete prefabricated components, and a bridge body 1 thereof can specifically include: the first structure bodies 11 are oppositely arranged at two sides of the river channel to form a supporting foundation; in fig. 1 to 4, the first structure body 11 is shown as a whole, but it is understood that the structure formed by splicing different types of precast concrete members is also an acceptable and mature implementation. The second structure 12, which is similarly provided, can also be configured in the same manner. Two second structures 12 are also oppositely arranged and respectively combined on one side of the first structure 11 close to the center line of the river channel, and together with the first structure 11, the second structures form a first supporting surface (not shown in the figure) on the top; in consideration of river factors, of course, in the present invention, a plurality of pier structures 13 may be provided according to a river span, which are provided between two of the second structures 12, the plurality of pier structures 13 together constituting a second support surface (not shown) at the top thereof, the second support surface being coplanar with the first support surface; the pavement member 200 is composed of a plurality of prefabricated plates (not marked) and is respectively spliced and laid on the first supporting surface and the second supporting surface; the precast slab can be a wood slab, a steel slab or a concrete precast slab with lower cost. The above-described configuration actually constitutes the basic configuration of the passable bridge 1. The pier structure 13 may be a solid member to increase a supporting performance in consideration of a load bearing of the bridge and a river runoff amount, or may be a hollow structure to facilitate a flow of water therethrough. Preferably, however, the pier structure 13 includes a hollow prefabricated shell 131 and a concrete-made filling block 132 inserted in the prefabricated shell 131.
Further, in consideration of safety, it is preferable that the pavement member 200 is provided with a side guard rail 17 along a length direction thereof and a separation guard rail 19 at a central position thereof, as shown in fig. 1 and 2, and the side guard rail 17 and/or the separation guard rail 19 are formed of a plurality of precast concrete members. The concrete prefabricated elements used here to form the side barriers 17 and the barrier barriers 19 can in fact be similar to most of the road barriers of the prior art and are therefore not described much. That is, it may be cast in one piece or may have multiple members joined together. However, in the present invention, it is preferable that the side guard rail 17 includes at least a first member 171 on the first support surface and a plurality of second members 172 on the second support surface, and the first member 171 and the second members 172 are connected by a rigid cross bar 173 penetrating both. In fact, the river position, i.e., the side guard rail disposed above the pier structure, is a grid-shaped guard rail formed by the spaced second members 172 and the rigid cross bars 173, which improves the landscape effect. When the side guard rails 17 are specifically provided, in particular, in some embodiments of the present invention, it is preferable that, as shown in fig. 1 and 6, the top supporting surface of the first structural body 11 is positioned higher than the top supporting surface of the second structural body 12 with a height difference D therebetween; the top supporting surfaces of the two opposite second structural bodies 12 correspond to the positions of the opposite outer sides of the side guard rails 17, side filling members 176 with the L-shaped cross sections are arranged, the supporting surfaces of the side filling members 176 and the top supporting surface of the first structural body 11 are coplanar and form the first supporting surface together, and the side guard rails 17 are fixedly arranged on the supporting surfaces of the side filling members 176. In such a configuration, the side rail 17 is restrained from falling off the deck by the side filling members 176 even when impacted.
In terms of improving safety, as shown in fig. 1 and 3, the present invention may further consider that a plurality of bridge seismic pedestals 15 for supporting the pavement member 200 are provided on the pier structure 13 under the second supporting surface. Fig. 7 shows a specific structure of the bridge seismic isolation foundation 15 according to the present invention, and as shown in the figure, the bridge seismic isolation foundation 15 is also an integrally assembled prefabricated member, and specifically includes a base 151, one side of the base 151 is fixed on the pier structure 13, and the other side of the base is opened to form a receiving structure, the receiving structure contains an elastic member 152 and a piston member 153 which is also arranged in the receiving structure and is located above the elastic member 152 to perform a piston motion, a rigid pad 154 made of steel is arranged above the piston member 153, and a top plate 155 connected to the pavement member. It can be seen that in such a structure, the transmission and absorption of bridge deck vibrations can be achieved at low cost, preventing the bridge from being damaged by resonance. As can be seen from fig. 7, a recessed groove 1531 is formed on the outer periphery of the piston member 153, and the recessed groove 1531 may cooperate with a rubber sealing ring (not shown) to form a relatively sealed connection, so as to improve the buffering and energy absorption effects.
As shown in fig. 1 and fig. 3, in rural areas, the bridge deck may be easily polluted due to more occasions for livestock and transportation of agricultural production materials, and especially for livestock manure, the appearance is affected and the potential safety hazard of driving is increased. Therefore, in the present invention, as shown in fig. 3, it is preferable that a water collection tank 16 for collecting rainfall be provided between the plurality of bridge seismic bases 15, a water recovery mechanism 18 for collecting water accumulated on the road surface is provided on the road surface member 200, and the water recovery mechanism 18 is communicated with the housing chamber 161 of the water collection tank 16. The recovered surface water can play a role in promoting the safety of pedestrians, and meanwhile, the collected rainwater can be temporarily stored in the water collecting tank 16. As shown in fig. 3, the water recovery mechanism 18 may include a dewatering well grate 181 disposed on the pavement member 200, a downpipe 183 connected to the dewatering well grate 181, and a control valve 182 disposed on the water collection tank 16, wherein the downpipe 183 is connected to the water collection tank 16, and the water collection tank 16 is further provided with a water outlet pipe 162 controlled by the control valve 182. This outlet pipe 162 can carry out periodic cleaning to the bridge floor with a washing cleaning device (for example, small-size pressurization squirt) cooperation, compares with direct river course water intaking, and this mode had both solved the bridge floor ponding problem, still provides convenience for the bridge floor washing simultaneously.
In addition, in the present invention, as shown in fig. 4, even when the pier structure 13 is prefabricated as the solid concrete, there may be a safety hazard in the simple bridge in coping with a sudden increase in surface runoff due to heavy rainfall, and for this reason, it is preferable in some embodiments that a plurality of connecting beams 133 are provided between a plurality of pier structures 13 in a direction in which the pavement member 200 extends in length. The connecting beams 133 can connect the plurality of pier structures 13 as a whole, and improve the flood resistance.
Also in consideration of flood resistance, as shown in fig. 2 and 5, in the present invention, it is preferable that the first member 11 is formed in a hexahedral shape having a bottom surface in a parallelogram shape and a top surface in a right trapezoid shape, and the second member 12 is formed in a hexahedral shape having a bottom surface in a right trapezoid shape and a top surface in a rectangular shape. That is, the first member 11 and the second member 12 are not regular hexahedral shapes, which is advantageous in forming a contact surface that is not parallel or tangential to the river discharge direction at any instance, and that may be flat or curved so long as it is not parallel or tangential to the river discharge direction, thereby providing the greatest resistance to discharge. In fig. 2, the two angles of the right trapezoid of the top side of the first component 11 are shown, respectively, angle c and the angle d complementary thereto, while in fig. 5, the angles of the right trapezoid of the bottom side of the second component 12 are shown, respectively, angle a and the angle b complementary thereto. In fact, to facilitate the prefabrication process, in some preferred embodiments, the included angle c is equal to the included angle b, and the included angle d is equal to the included angle a.
Furthermore, for some river channels in southern areas of our country, for example, because the soil is loose, in some embodiments, as shown in fig. 6, it may be considered that the two sides of the river channel are pre-constructed and constructed by combining the river channel laying member 300 provided in this embodiment, and the portion of the bridge 1 is completely the same as the above-mentioned embodiments. As shown in fig. 6, the river course laying member 300 may include a tetrahedral support structure 301 constructed at both sides of the river course and a wedge-shaped support structure 302 coupled to one side of the tetrahedral support structure 301 (actually, a hexahedron with two corresponding surfaces opened along the flow direction of the river) near the center line of the river course. Referring to fig. 6, it can be seen that the tetrahedral support structure 301 is actually a cylindrical structure, facilitating flood discharge when runoff increases. Also included is the wedge-shaped support structure 302, which also ensures the construction of the joint with the first structure 11. In this embodiment, the river course laying member 300 can effectively cope with bridge safety hazards caused by soft river course soil layers, and meanwhile, the problem that the traditional bridge construction is not easy and the cost is changed is avoided.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (5)
1. Simple and easy bridge of easily being under construction for erect between two banks in the river course and can supply pedestrian or carrier to pass through, its characterized in that includes:
the first structure bodies are oppositely arranged at two sides of the river channel to form a supporting foundation;
the two second structures are oppositely arranged and respectively combined on one side of the first structure, which is close to the center line of the river channel, and the two second structures and the first structure form a first supporting surface at the top;
a plurality of pier structural bodies arranged between the two second structural bodies, wherein the plurality of pier structural bodies jointly form a second supporting surface positioned at the top of the pier structural bodies, and the second supporting surface is coplanar with the first supporting surface; the pier structure comprises a hollow prefabricated shell and a filling block made of concrete and inserted into the prefabricated shell,
a pavement member which is composed of a plurality of precast slabs and is respectively spliced and laid on the first supporting surface and the second supporting surface; the pavement member is provided with an edge guardrail along the length direction, the center of the pavement member is provided with an isolation guardrail, the edge guardrail and/or the isolation guardrail is composed of a plurality of precast concrete members, the edge guardrail at least comprises a first member positioned on a first supporting surface and a plurality of second members positioned on a second supporting surface, and the first member and the second member are connected through a rigid cross rod penetrating through the first member and the second member; the first member is configured in a parallelepiped shape having a parallelogram bottom surface and a rectangular trapezoid top surface, and the second member is configured in a parallelepiped shape having a rectangular trapezoid bottom surface and a rectangular trapezoid top surface;
wherein the first structure and/or the second structure are each independently constructed from one or more concrete precast elements; the top supporting surface of the first structural body is higher than that of the second structural body, and a height difference D is formed between the top supporting surface of the first structural body and the top supporting surface of the second structural body; and side filling members with L-shaped sections are arranged at positions corresponding to the relative outer sides of the side guardrails on the top supporting surfaces of the two opposite second structural bodies, the supporting surfaces of the side filling members and the top supporting surface of the first structural body are coplanar and jointly form the first supporting surface, and the side guardrails are fixedly arranged on the supporting surfaces of the side filling members.
2. The bridge of claim 1, wherein a plurality of bridge seismic pedestals for supporting the pavement member are provided on the pier structure below the second support surface.
3. The easy-to-construct simple bridge according to claim 2, wherein a water collection tank is disposed between the plurality of bridge earthquake-proof bases, and a water recovery mechanism for collecting water accumulated on the road surface is disposed on the road surface member and is communicated with the water collection tank.
4. The easy-to-construct simple bridge according to claim 3, wherein the water recovery mechanism comprises a dewatering well grate disposed on the pavement member and a downpipe connected to the dewatering well grate, and a control valve disposed on the header tank, the downpipe being connected to the header tank, and the header tank being further provided with an outlet pipe controlled by the control valve.
5. The bridge of claim 1, wherein a plurality of connecting beams are provided between the plurality of pier structures along a longitudinal extension direction of the pavement member.
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CN202110821264.3A CN113481824B (en) | 2021-07-20 | 2021-07-20 | Simple bridge easy to construct |
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CN202110821264.3A CN113481824B (en) | 2021-07-20 | 2021-07-20 | Simple bridge easy to construct |
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CN113481824B true CN113481824B (en) | 2023-03-31 |
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CN211815480U (en) * | 2019-11-23 | 2020-10-30 | 武汉志宏水利水电设计院 | Prefabricated formula traffic bridge |
CN111794071A (en) * | 2020-07-06 | 2020-10-20 | 上海崇明水利工程有限公司 | Water conservancy bridge structure |
CN112281625B (en) * | 2020-11-28 | 2022-04-26 | 中交二航局第一工程有限公司 | Fabricated construction trestle and construction method thereof |
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2021
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