CN113944106A - Steel trestle bridge channel for upper bridge of land short pier bridge and construction method of steel trestle bridge channel - Google Patents
Steel trestle bridge channel for upper bridge of land short pier bridge and construction method of steel trestle bridge channel Download PDFInfo
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- CN113944106A CN113944106A CN202111264417.5A CN202111264417A CN113944106A CN 113944106 A CN113944106 A CN 113944106A CN 202111264417 A CN202111264417 A CN 202111264417A CN 113944106 A CN113944106 A CN 113944106A
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling 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
- 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
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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
- E01D19/10—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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G27/00—Temporary arrangements for giving access from one level to another for men or vehicles, e.g. steps, ramps
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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Abstract
The invention belongs to the related technical field of bridge construction, and discloses a steel trestle channel for an upper bridge of a land short pier bridge, which is designed at the land short pier of the bridge in construction, is arranged along the line direction along the bridge direction, and sequentially comprises four composition structures of an abutment, a post-abutment slope body, a climbing part, a turning platform and a beam body lap joint part along the line direction; in addition, the main body internal structure of the steel trestle channel for the upper bridge sequentially comprises a concrete strip foundation, steel buttresses, a multilayer distribution beam, a bridge deck and a protection facility from bottom to top. The invention further discloses a corresponding construction method. The invention effectively increases the number of available bridge-erecting channels, obviously improves the material transportation efficiency, and has the advantages of compact and reasonable structure, convenient construction, low comprehensive cost, environmental protection, material saving and the like, thereby being particularly suitable for construction application occasions of various super-large bridges.
Description
Technical Field
The invention belongs to the related technical field of bridge construction, and particularly relates to a steel trestle channel for an upper bridge of a land short pier bridge and a construction method thereof.
Background
Along with the development of domestic infrastructure ability, more and more bridges, especially super-huge bridges can be constructed, and correspondingly, in the construction process, a certain number of bridge-loading channels need to be arranged so as to improve the transportation efficiency of various materials and accelerate the site construction speed.
However, in the prior art, the abutment part is usually adopted for bridging, such a conventional scheme can increase the transportation distance and increase the transportation cost, and meanwhile, various defects of existing access occupying a large distance, inconvenience in maintenance and management, slow field construction and the like exist. Accordingly, there is a need in the art for further research and improvement to this technical problem so as to better meet the requirements of high efficiency and low cost in the design and construction process of the bridge passage in various bridge construction processes.
Disclosure of Invention
Aiming at the defects or shortcomings in the prior art, the invention aims to provide a steel trestle channel for an upper bridge of a land short pier bridge and a construction method thereof, wherein the internal structural design, the construction process and other aspects of the upper bridge channel are redesigned by closely combining the construction working condition characteristics and requirements in the bridge construction process, so that a larger number of upper bridge channels can be correspondingly effectively increased, the use distance of existing sidewalks is reduced, the material transportation efficiency is obviously improved, the field construction speed is accelerated, and the steel trestle channel has the advantages of compact and reasonable structure, convenience in construction and construction, low comprehensive cost, environmental protection, material saving and the like, and is particularly suitable for construction application occasions of various super-large bridges.
In order to achieve the above object, according to one aspect of the present invention, there is provided a steel trestle channel for upper bridge of land short pier bridge, comprising:
the steel trestle bridge channel for the upper bridge is designed at a land short pier of a bridge in construction, is arranged along a line direction along the bridge direction of the bridge, and sequentially comprises four components of a bridge abutment, a post-abutment slope body, a climbing part, a turning platform and a beam body lap joint part along the line direction; in addition, the main body internal structure of the steel trestle channel for the upper bridge sequentially comprises a concrete strip foundation, steel buttresses, a multilayer distribution beam, a bridge deck and a protection facility from bottom to top.
As a further preference, the steel trestle for upper bridges is also designed in the vicinity of existing local crossings and/or in the vicinity of material supply.
Further preferably, the steel trestle for the upper bridge is preferably in the form of a single lane, is designed to be 5-6 m wide, and consists of an upper bridge vehicle channel and an upper bridge pedestrian channel.
As a further preference, the concrete strip foundation is preferably designed as follows: the top surface of the concrete strip foundation is flush with the ground, and a first steel plate is embedded in the top surface; the first steel plate is used for connecting the steel buttresses and is provided with a plurality of steel bars with hooks which are connected with the interior of the main body of the concrete strip foundation.
As a further preference, the steel buttress preferably takes the form of a spiral welded pipe, and a second steel plate is used as a cap on the top of the spiral welded pipe; the spiral welded pipe is connected with the first steel plate and the second steel plate in a reinforcing way by adopting a plurality of triangular steel plates; in addition, preferably, transverse horizontal braces and cross braces are adopted between the steel buttresses in the transverse bridge direction for connection and reinforcement, the cross braces and the horizontal braces are properly arranged along the steel buttresses in the bridge direction according to the span, I-shaped steel inclined braces are arranged at the tops of the tail end steel buttresses in the bridge direction, and meanwhile, the bottom of the tail end steel buttresses is supported by adopting a strip foundation.
Preferably, the multilayer distribution beam preferably adopts a form of three layers of distribution beams, namely a transverse bridge main beam, a longitudinal bridge tie beam and a transverse bridge distribution beam from bottom to top; the transverse girder of the first layer preferably adopts double-spliced I-shaped steel, a batten plate is welded on the top surface of an I-shaped steel flange plate at the bottom of the steel buttress for reinforcement, and an anti-falling third steel plate is arranged between the lower opening of the upper flange plate of the double-spliced I-shaped beam on the reverse slope direction side of the steel trestle and the second steel plate of the steel buttress for reinforcement; i-shaped steel is preferably adopted as the longitudinal bridge tie beam of the second layer, and gusset plates are additionally arranged on the inner side and the outer side of the web plate of the I-shaped steel joint part for reinforcement; the transverse bridge-direction distribution beam of the third layer preferably adopts inverted channel steel and is connected with the longitudinal bridge-direction tie beam of the second layer in a welding way; and a travelling channel and a pedestrian channel are arranged between the protective measures and the trestle, and are isolated by using a travelling separation line.
As a further preference, the bridge deck and the protective facilities are preferably designed as follows: the bridge deck is made of a patterned steel plate, and twisted steel bars are arranged on the patterned steel plate at intervals; the protective facility comprises a railing, wherein stand columns of the railing are welded on the transverse bridge distribution beam on the third layer, and seamless steel pipes are welded among the stand columns to be used as handrails; the traffic separation line is separated by welding channel steel.
More preferably, the four components of the steel trestle for upper bridge are designed as follows: the bridge abutment is preferably C30 concrete bridge abutment, the size is 6m multiplied by 2m multiplied by 2.6m, and brick slag behind the bridge abutment is along the slope; the maximum longitudinal slope of the climbing part is controlled within 20 percent, and the maximum longitudinal slope is further preferably 10 to 15 percent; the longitudinal slope of the turning platform is designed to be 0, and the center of the turning platform is arranged on the central axis of the pier body of the short pier; the beam body overlap joint part adopts an I-beam with one end obliquely cut open as a distribution beam, a steel plate is fully paved on the top of the distribution beam, a travelling crane separation line and a guard rail are welded, and the separation line adopts channel steel to be welded on the distribution beam or a pattern steel plate.
More preferably, the steel trestle for the upper bridge is preferably applied to the construction occasions of various super-large bridges.
According to another aspect of the present invention, there is also provided a corresponding construction method, characterized in that the construction method comprises the steps of:
s1, excavating the abutment and the strip foundation, and performing concrete pouring and reinforcement;
s2, mounting spiral welded pipes as steel buttresses, and reinforcing the steel buttresses in the transverse bridge direction and the forward bridge direction respectively;
s3, sequentially mounting a transverse bridge directional main beam of a first layer of the trestle, a longitudinal bridge directional tie beam of a second layer and a transverse bridge directional distribution beam of a third layer from bottom to top, and then respectively reinforcing the transverse bridge directional main beam, the longitudinal bridge directional tie beam and the transverse bridge directional distribution beam;
s4, sequentially mounting a forward-direction steel support and a transverse-direction tie beam at the lap joint part of the trestle and the beam body from bottom to top, and then respectively reinforcing the forward-direction steel support and the transverse-direction tie beam;
and S5, mounting the bridge deck and the protection facilities, and performing backfill on the slope behind the abutment.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
(1) the steel trestle for the upper bridge is arranged at the land short pier of the bridge in construction along the line direction, and can be better matched with the upper bridge channel at the existing road, so that the number of the available upper bridge channels is effectively increased, the use distance of the existing access road is reduced, the material transportation efficiency is obviously improved, and the site construction speed is accelerated;
(2) the invention also carries out targeted design on the whole internal structure of the steel trestle for the upper bridge, particularly the arrangement mode of a plurality of key component modules, can correspondingly ensure the firmness and the reliability of the channel of the upper bridge, effectively prevent the impact action of vehicle running, and has the advantages of lower comprehensive cost, environmental protection, material saving, convenient construction and later maintenance as a material capable of being turned around;
(3) more practical projects show that the steel trestle channel for the upper bridge of the land short pier bridge and the construction method thereof can better adapt to various complex working condition environments, obviously shorten the transportation distance of materials, reduce the construction cost of the temporary trestle and reduce the maintenance cost, thereby being particularly suitable for building construction application occasions of various ultra-large bridges.
Drawings
FIG. 1 is a schematic cross-sectional view of a turn platform according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a steel trestle channel for an upper bridge of a land short pier bridge, which is formed along a line direction along the bridge direction;
fig. 3 is a schematic cross-sectional view of a ramp in accordance with a preferred embodiment of the present invention;
FIG. 4 is a partial schematic view of a steel trestle according to a preferred embodiment of the invention;
FIG. 5 is an enlarged schematic view of node A according to the preferred embodiment of the present invention;
FIG. 6 is a flow chart of a construction process of a steel trestle channel for an upper bridge of a land short pier bridge according to a preferred embodiment of the invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 1 is a schematic structural diagram of a steel trestle channel for an upper bridge of a land short pier bridge, which is disclosed by the invention, along the line direction of the bridge along the bridge direction. The steel trestle passage for upper bridge according to the present invention will be specifically explained with reference to fig. 1.
Referring to fig. 1, the steel trestle channel for the upper bridge is designed at a land low pier of a bridge under construction, is arranged along a line direction along a bridge direction of the bridge, and sequentially comprises four constituent structures of a bridge abutment, a post-abutment slope body, a climbing part, a turning platform and a beam body lap joint part along the line direction; in addition, the main body internal structure of the steel trestle channel for the upper bridge sequentially comprises a concrete strip foundation, steel buttresses, a multilayer distribution beam, a bridge deck and a protection facility from bottom to top.
Correspondingly, by selecting the positions with small height of the bridge piers to be additionally provided with a plurality of upper bridge channels, the integral length of the temporary trestle does not need to be overlarge, and the integral construction amount and the construction difficulty of the upper bridge channels are obviously reduced; in addition, the bridge approach can be designed near a logistics supply place such as a mixing station or the like or near a road in the close vicinity, so that the number of the required bridge approaches can be effectively increased, local resources can be more fully utilized, and the use and maintenance of bridge construction access roads can be reduced. In addition, this steel trestle should keep away from access road one side, can not set up and block up on the access road, when near under-bridge headroom does not satisfy the requirement, can set up on the access road, nevertheless need to impose the part outside the landing stage and use the ground to go through former bridge construction access road temporarily, guarantee that the logistics organization under the bridge is unblocked.
According to a preferred embodiment of the invention, the steel trestle for the upper bridge is preferably in the form of a single lane, for example, 5m to 6m wide, and is composed of an upper vehicle channel and an upper pedestrian channel. More specifically, for example, the width of a traffic lane is 3.75m, and the clear width of the left and right sidewalks is 0.6 m.
According to another preferred embodiment of the present invention, the four constituent structures of the steel trestle for upper bridge are preferably designed as follows: the abutment can be C30 concrete abutment, for example, the size is 6m multiplied by 2m multiplied by 2.6m (length multiplied by width multiplied by height), the height of 1m is buried underground, the height from the ground to the supporting cushion abutment is 1.6m, and the brick slag behind the abutment is along the slope; the maximum longitudinal slope of the climbing part can be controlled within 20 percent, and the maximum longitudinal slope is further preferably 10 to 15 percent; the longitudinal slope of the turning platform is designed to be 0, and the center of the turning platform is arranged on the central axis of the pier body of the short pier; the beam body overlap joint part adopts an I-beam with one end obliquely cut open as a distribution beam, and the top of the distribution beam is fully paved with a steel plate, and then a travelling crane separation line and a guard rail are welded.
Referring to fig. 2 to 5, the internal structure of the steel trestle channel for the upper bridge of the land short pier bridge, particularly the arrangement of some key component modules, according to the present invention will be described in detail.
The main body internal structure of the steel trestle channel for the upper bridge comprises a concrete strip foundation, steel buttresses, a multilayer distribution beam, a bridge deck and a protective facility from bottom to top in sequence. For the concrete strip foundation, C25 reinforced concrete can be preferably used: the strip foundation is 5m long, 2m wide and 1m high, the top surface is flush with the ground, and steel plates with specifications of 100 multiplied by 1cm (length multiplied by width multiplied by thickness) are embedded at the top of the strip foundation for steel buttresses and inclined struts, and 4 phi 20mm steel bars with hooks are preferably arranged on the embedded steel plates and connected with the strip foundation.
For the steel buttress, the steel buttress preferably takes the form of a spiral welded pipe, and a second steel plate is used as a column cap at the top of the spiral welded pipe; the spiral welded pipe is connected with the first steel plate and the second steel plate in a reinforcing way by adopting a plurality of triangular steel plates; in addition, preferably, transverse horizontal braces and cross braces are adopted between the steel buttresses in the transverse bridge direction for connection and reinforcement, the cross braces and the horizontal braces are properly arranged along the steel buttresses in the bridge direction according to the span, I-shaped steel inclined braces are arranged at the tops of the tail end steel buttresses in the bridge direction, and meanwhile, the bottom of the tail end steel buttresses is supported by adopting a strip foundation.
As a more specific exemplary illustration, the steel buttress has a transverse bridge spacing of 3.75m and a forward bridge spacing of 6m or 12 m; spiral welded pipes with the diameter of phi 529mm or phi 630mm and the wall thickness of 8-10mm can be adopted, the column bodies are arranged as long as possible, if the sections are arranged, the flange plates are adopted to be connected with the column bodies after welding, and the connection positions of the flange plates are staggered from front to back and from left to right; the top of the spiral pipe adopts a 75 multiplied by 2cm (length multiplied by width multiplied by thickness) steel plate as a column cap; the spiral welded pipe is connected with the embedded steel plate and the top steel plate in a reinforcing way by adopting 4 triangular steel plates; the transverse bridge steel buttresses are connected and reinforced by adopting transverse horizontal braces and cross braces, and the transverse horizontal braces and the cross braces are made of [10 channel steel; horizontal supports and scissor supports along the bridge direction are arranged at the tops of spiral pipes with the longitudinal distance of 12m, wherein the horizontal supports are made of I20I-shaped steel, and the scissor supports are made of [ 10U-steel; when the height of the spiral welded pipe exceeds 5m, a cross brace is arranged on the along-bridge column body, and I20I-shaped steel is adopted as a cross brace material; I32I-steel diagonal braces are arranged on spiral welded pipes of the turning platform along the opposite direction of the trestle along the bridge direction for supporting the stability of the platform, and a strip-shaped foundation with the length of 80 multiplied by 80cm (the length of the strip-shaped foundation is multiplied by the width of the strip-shaped foundation is adopted at the bottom of the turning platform for supporting so as to prevent the instability of the trestle caused by the impact effect of vehicle driving.
For the multilayer distribution beam, the form of three layers of distribution beams is preferably adopted, and the distribution beams are respectively a transverse bridge main beam, a longitudinal bridge tie beam and a transverse bridge distribution beam from bottom to top.
As a more specific exemplary illustration, wherein: the first layer of girder can adopt I40 double-spliced I-steel, and the upper and lower top surfaces of the flange plate of the I-steel are welded with batten plates for reinforcement, and meanwhile, an anti-falling steel plate is arranged between the lower opening of the upper flange plate of the double-spliced I-steel girder on the side of the reverse slope direction of the steel trestle and the steel plate at the top of the spiral welded pipe for reinforcement; the second layer of tie beams can be formed by welding I36I-beams generally at a distance of 50 cm/root, the connecting parts are mostly arranged above the main beams, and for example, 40cm multiplied by 30cm multiplied by 10mm (long multiplied by high multiplied by thick) batten plates are additionally arranged on the inner side and the outer side of the web plate of the joint part of the I-beams for reinforcement, and the gap between the lower main beam and the longitudinal beam along the bridge is welded by adopting steel plate support pads, wherein the longitudinal beam can be disconnected at the place where the ramp and the turning platform are located, but the connection of the batten plates of the web plate is not reduced; the third layer of distributed beams can be welded with the second layer of distributed beams by adopting inverted channel steel, and the clear distance of the channel steel is 15cm for example.
For the bridge deck and the protection facilities, the bridge deck adopts a pattern steel plate, and the pattern steel plate is provided with twisted steel bars at intervals; the protective facility comprises a railing, wherein stand columns of the railing are welded on the transverse bridge distribution beam on the third layer, and seamless steel pipes are welded and connected among a plurality of stand columns to serve as handrails.
As a more specific exemplary illustration, the inner sides of the left and right driving lines can be paved by adopting 3 patterned steel plates with the width of 125cm and the thickness of 8mm through bridges, and phi 12mm twisted steel bars can be welded on the two sides of the patterned steel plates at intervals of 20cm to serve as anti-skidding measures; phi 12mm twisted steel bars are welded outside the travelling crane line along the bridge direction to serve as pedestrian passages, and the distance between every two twisted steel bars is 3 cm; the driving lines are welded on the tops of the transverse distribution channel steels of the third layer by adopting vertical channel steels for separation; the outer side through bridge of the full-bridge sidewalk of the steel trestle is provided with a railing, upright posts of the railing are machined and welded on a third layer of transverse distribution beams by adopting 10 channel steel at intervals of 2m and at a height of 1.2m, the upright posts are connected by adopting upper, middle and lower 3 phi 42mm seamless steel tubes for equidistant welding, and yellow and black alternately reflective paint can be coated.
According to another preferred embodiment of the invention, the overlapped part of the beam body and the steel trestle preferably adopts I-shaped steel with one end being obliquely opened as a distribution beam, the clear distance along the bridge direction is 15cm for example, then a thick pattern steel plate with the thickness of 8mm for example is fully paved on the top of the distribution beam, and then a traffic separation line and a guard rail are welded; one end of the diagonal cut of the distribution beam is welded and fixed on a steel support on the inner side of a reinforcing steel bar of the bridge deck protective wall, the steel support can be made of double I-shaped 32 steel, and an expansion screw is arranged at a drill hole at the bottom of the steel support for preventing the steel support from moving; the other end of the distribution beam is welded and fixed on the + 2I-shaped steel I40 with double splicing along the bridge direction and I10 with double splicing along the bridge direction (the two I-shaped steel I40 with double splicing are also welded), the I-shaped steel I40 with double splicing along the bridge direction is embedded between the I-shaped steel I40 with double splicing along the transverse bridge direction to be subjected to flange plate cutting treatment, and then the I-shaped steel I40 with double splicing along the longitudinal bridge direction, the I-shaped steel I40 with double splicing along the transverse bridge direction and a steel plate at the top of the steel buttress are welded and fixed. In order to facilitate the normal running of the vehicle at the connecting part, brick slag can be arranged on the inner side of the bridge deck steel support for carrying out down-slope backfilling, or isolated concrete is applied for carrying out down-slope extending.
As supplementary explanation, in order to reduce the concentrated stress of the beam surface, the stress area can be enlarged by supporting and cushioning square wood below the distribution beam connected between the trestle and the bridge surface. In addition, in order to enhance the management of a construction site and reduce potential safety hazards, an entrance guard and a duty room can be arranged at the starting point of the bridge abutment climbing ramp, construction vehicles and constructors uniformly make an entrance guard card in advance to realize automatic opening and closing of the entrance guard when the entrance guard passes through, and the duty room aims at enhancing site patrol and eliminating site unsafe behaviors.
FIG. 6 is a flow chart of a construction process of a steel trestle channel for an upper bridge of a land short pier bridge according to a preferred embodiment of the invention. As exemplarily shown in fig. 6, the construction method mainly includes the following steps:
firstly, excavating a bridge abutment and a strip foundation, and performing concrete pouring and reinforcement;
then, installing spiral welded pipes as steel buttresses, and reinforcing the steel buttresses in the transverse bridge direction and the forward bridge direction respectively;
then, sequentially mounting a first layer of transverse bridge-direction main beams, a second layer of longitudinal bridge-direction tie beams and a third layer of transverse bridge-direction distribution beams from bottom to top, and then respectively reinforcing the transverse bridge-direction main beams, the second layer of longitudinal bridge-direction tie beams and the third layer of transverse bridge-direction distribution beams;
the lap joint parts are similar and are not described in detail;
and finally, installing a bridge deck and a protection facility, and performing backfilling of the slope behind the abutment.
In conclusion, by redesigning the internal structure design of the upper bridge channel, the construction process and the like, more upper bridge channels can be correspondingly and effectively added, the use distance of the existing access way is reduced, the material transportation efficiency is obviously improved, and the field construction speed is accelerated. The steel trestle channel for the upper bridge of the land short pier bridge and the construction method thereof can better adapt to various complex working condition environments, obviously shorten the transportation distance of materials, and have the advantages of compact and reasonable structure, convenience in construction and construction, low comprehensive cost, environmental protection, material saving and the like, so that the steel trestle channel is particularly suitable for construction and construction application occasions of various super-large bridges.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A steel trestle channel for an upper bridge of a land short pier bridge is characterized in that the steel trestle channel for the upper bridge is designed at the land short pier of the bridge in construction, is arranged along the line direction along the bridge direction of the bridge, and sequentially comprises four components of a bridge abutment, a post-abutment slope body, a climbing part, a turning platform and a beam body lap joint part along the line direction; in addition, the main body internal structure of the steel trestle channel for the upper bridge sequentially comprises a concrete strip foundation, steel buttresses, a multilayer distribution beam, a bridge deck and a protection facility from bottom to top.
2. The steel trestle channel for the upper bridge of the land short pier bridge, as claimed in claim 1, wherein the steel trestle for the upper bridge is also designed near existing road junctions and/or near material supply sites.
3. The steel trestle channel for the upper bridge of the land short pier bridge as claimed in claim 1 or 2, wherein the steel trestle for the upper bridge preferably takes the form of a single lane, has a width designed to be 5 m-6 m, and consists of an upper vehicle channel and an upper pedestrian channel.
4. The steel trestle channel for the upper bridge of the land short pier bridge as claimed in any one of claims 1 to 3, wherein the concrete strip foundation is preferably designed as follows: the top surface of the concrete strip foundation is flush with the ground, and a first steel plate is embedded in the top surface; the first steel plate is used for connecting the steel buttresses and is provided with a plurality of steel bars with hooks which are connected with the interior of the main body of the concrete strip foundation.
5. The steel trestle channel for the upper bridge of the land short pier bridge as claimed in any one of claims 1 to 4, wherein the steel buttress is preferably in the form of a spiral welded pipe, and a second steel plate is used as a cap on the top of the spiral welded pipe; the spiral welded pipe is connected with the first steel plate and the second steel plate in a reinforcing way by adopting a plurality of triangular steel plates; in addition, preferably, transverse horizontal braces and cross braces are adopted between the steel buttresses in the transverse bridge direction for connection and reinforcement, the cross braces and the horizontal braces are properly arranged along the steel buttresses in the bridge direction according to the span, I-shaped steel inclined braces are arranged at the tops of the tail end steel buttresses in the bridge direction, and meanwhile, the bottom of the tail end steel buttresses is supported by adopting a strip foundation.
6. The steel trestle channel for the upper bridge of the land short pier bridge as claimed in any one of claims 1 to 5, wherein the multilayer distribution beam preferably takes the form of three layers of distribution beams, namely a transverse bridge-to-main beam, a longitudinal bridge-to-tie beam and a transverse bridge-to-distribution beam from bottom to top; the transverse girder of the first layer preferably adopts double-spliced I-shaped steel, a batten plate is welded on the top surface of an I-shaped steel flange plate at the bottom of the buttress for reinforcement, and an anti-falling third steel plate is arranged between the lower opening of the upper flange plate of the double-spliced I-shaped beam on the reverse slope direction side of the steel trestle and the second steel plate of the steel buttress for reinforcement; i-shaped steel is preferably adopted as the longitudinal bridge tie beam of the second layer, and gusset plates are additionally arranged on the inner side and the outer side of the web plate of the I-shaped steel joint part for reinforcement; the transverse bridge-direction distribution beam of the third layer preferably adopts inverted channel steel and is connected with the longitudinal bridge-direction tie beam of the second layer in a welding mode.
7. The steel trestle channel for the upper bridge of the land short pier bridge as claimed in any one of claims 1 to 6, wherein the bridge deck and the protection facilities are preferably designed as follows: the bridge deck is made of a patterned steel plate, and twisted steel bars are arranged on the patterned steel plate at intervals; the protective facility comprises a railing, wherein stand columns of the railing are welded on the transverse bridge distribution beam on the third layer, and a plurality of stand columns are welded and connected by seamless steel pipes; and a travelling channel and a pedestrian channel are arranged between the protective measures and the trestle, and are isolated by using a travelling separation line.
8. The steel trestle channel for the upper bridge of the land short pier bridge as claimed in any one of claims 1 to 7, wherein four constituent structures of the steel trestle for the upper bridge are preferably designed as follows: the bridge abutment is preferably C30 concrete bridge abutment, the size is 6m multiplied by 2m multiplied by 2.6m, and brick slag behind the bridge abutment is along the slope; the maximum longitudinal slope of the climbing part is controlled within 20 percent, and the maximum longitudinal slope is further preferably 10 to 15 percent; the longitudinal slope of the turning platform is designed to be 0, and the center of the turning platform is arranged on the central axis of the pier body of the short pier; the beam body overlap joint part adopts an I-beam with one end obliquely cut open as a distribution beam, and the top of the distribution beam is fully paved with a steel plate, and then a travelling crane separation line and a guard rail are welded.
9. The steel trestle channel for the upper bridge of the land short pier bridge as claimed in any one of claims 1 to 8, wherein the steel trestle for the upper bridge is preferably used in the construction of various types of oversize bridges.
10. A construction method for the steel trestle channel for the upper bridge of the land short pier bridge as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:
s1, excavating the abutment and the strip foundation, and performing concrete pouring and reinforcement;
s2, mounting spiral welded pipes as steel buttresses, and reinforcing the steel buttresses in the transverse bridge direction and the forward bridge direction respectively;
s3, sequentially mounting a transverse bridge directional main beam of a first layer of the trestle, a longitudinal bridge directional tie beam of a second layer and a transverse bridge directional distribution beam of a third layer from bottom to top, and then respectively reinforcing the transverse bridge directional main beam, the longitudinal bridge directional tie beam and the transverse bridge directional distribution beam;
s4, sequentially mounting a forward-direction steel support and a transverse-direction tie beam at the lap joint part of the trestle and the beam body from bottom to top, and then respectively reinforcing the forward-direction steel support and the transverse-direction tie beam;
and S5, mounting the bridge deck and the protection facilities, and performing backfill on the slope behind the abutment.
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| CN202111264417.5A CN113944106A (en) | 2021-10-28 | 2021-10-28 | Steel trestle bridge channel for upper bridge of land short pier bridge and construction method of steel trestle bridge channel |
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