CN114250713B - Permanent-face combined mountain area upper bearing arch bridge structure and construction method thereof - Google Patents
Permanent-face combined mountain area upper bearing arch bridge structure and construction method thereof Download PDFInfo
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- CN114250713B CN114250713B CN202210091622.4A CN202210091622A CN114250713B CN 114250713 B CN114250713 B CN 114250713B CN 202210091622 A CN202210091622 A CN 202210091622A CN 114250713 B CN114250713 B CN 114250713B
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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
- E01D12/00—Bridges characterised by a combination of structures not covered as a whole by a single one of groups E01D2/00 - E01D11/00
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Abstract
The invention provides a permanent-face combined mountain area upper bearing arch bridge structure and a construction method thereof, wherein the permanent-face combined mountain area upper bearing arch bridge structure comprises an arch base and a bridge abutment which are taken as a foundation of a permanent buckling tower, a lower permanent buckling tower column is positioned above the arch base and is connected with the arch base into a whole, a permanent buckling tower cross beam is arranged at the upper end of the lower permanent buckling tower column, and upper permanent buckling tower columns are arranged at two sides of the permanent buckling tower cross beam; a main arch ring is arranged between the two arch seats, and an arch upright post is erected at the upper end of the main arch ring; and a bridge deck system is erected at the upper ends of the bridge abutment, the permanent buckling tower cross beam and the arch upper upright post. The arch rib is just connected with the permanent buckling tower through the arch base, and the arch base is used as a shared base of the permanent buckling tower and the arch bridge, so that the construction measure cost of the arch bridge can be greatly reduced. The overhead upright posts and the bridge approach lower structures in the coverage range of the single-tower cable-stayed bridge are saved, the engineering scale is reduced, and meanwhile, the damage to mountain bodies on two sides is reduced.
Description
Technical Field
The invention relates to the technical field of civil engineering bridges, in particular to a construction method of a permanent-face combined mountain area upper bearing arch bridge structure, and also relates to a permanent-face combined mountain area upper bearing arch bridge structure, which has larger crossing capacity and better economy.
Background
Bridges are structures used in road, railway, urban road and rural road and water construction to span various obstacles such as rivers, or other structures. The bridge is divided into beams, arches, rigid frames, hanging and combined systems according to the structural stress characteristics. The arch bridge is a classical bridge structure and is divided into an upper bearing type, a middle bearing type and a lower bearing type according to the position of a bridge deck system. The upper bearing arch bridge is widely applied to areas with limited construction conditions and high environmental protection requirements of the bridge crossing mountain canyons and under the bridge due to the characteristics of low building height, strong crossing capability, strong terrain adaptability in mountain areas, good economy and the like. When the maximum span of the existing push-up arch bridge exceeds 600m and the span is further increased, the scale of the arch base and the foundation needs to be obviously increased to resist the horizontal pushing force of the arch springing, the construction difficulty of the arch ring structure is also increased, the construction measure cost is increased continuously in proportion to the bridge construction installation cost, and the economical efficiency of the bridge is deteriorated, so that the construction of the arch bridge is one of the bottlenecks for restricting the development of the bridge to the large span.
In general, the main factors affecting the increase in span of the overpass are: (1) After the span exceeds 600m, the horizontal thrust of the arch springing is large, the technical risk is increased, the safety of the structure is deteriorated, and the engineering economy is deteriorated; (2) The construction difficulty of the arch ring structure increases exponentially along with the increase of the span, and the increased construction measure cost also greatly reduces the economy of the arch bridge; (3) The cable-stayed buckling and hanging and cable hoisting systems commonly adopted in the construction of the large-span arch bridge are all of temporary structures, a temporary buckling tower structure is usually required to be built, the cable-stayed buckling and hanging and cable hoisting systems are also required to be dismantled after the construction is finished, and the design and construction difficulty of the temporary structure are increased; (4) The bridge span ratio of the arch bridge is generally between 1/5 and 1/4, the bridge structure is high, the heights of the upright posts on the arch of the extra-large arch bridge, the main bridge approach transition piers and the bridge approach piers are higher, and the construction cost is obviously increased.
Therefore, under the background, a novel upper-bearing arch bridge structure form with larger spanning capability and better economy is developed, and the novel upper-bearing arch bridge structure form has great practical value.
Disclosure of Invention
The invention aims to provide a construction method of a permanent-face combined mountain area upper bearing arch bridge structure, which fully utilizes a cable-stayed bridge tower as a permanent-face combined structure and takes a permanent structure as a part of construction measures to form a permanent-face combined structure with a construction temporary measure, simplifies the setting of the arch bridge construction measure and has better engineering economy.
The invention further aims to provide a combined mountain area overhead arch bridge structure which is capable of improving the bearing efficiency of the bridge structure in terms of a structural system and an internal stress mechanism compared with a traditional overhead arch bridge, flexibly adjusting the span of a cable-stayed bridge according to different engineering project requirements, improving the adaptability of the bridge to environmental conditions and increasing the bridge spanning capacity, and facilitating the implementation and reducing the construction cost of the large-span arch bridge structure.
In order to further achieve the above purpose, the present invention adopts the following technical scheme: a construction method of a permanent combined mountain area upper bearing arch bridge structure comprises the following steps:
(1) Setting an arch abutment in a foundation layer with proper engineering geology below a ground line through address investigation, excavating and cast-in-situ bridge abutment and an arch abutment foundation, taking the bridge abutment as a gravity anchorage of a two-bank side cable hoisting system, and constructing a temporary buckling cable anchorage;
(2) Constructing a lower tower column of the permanent buckling tower on the arch support by adopting a sliding mode or a turnover mode, constructing a cross beam of the permanent buckling tower by taking a bracket, constructing an upper tower column of the permanent buckling tower on the cross beam by continuing the sliding mode or the turnover mode, installing a cable hanging system on the top of the tower column, and reserving a pre-buried hole of a temporary buckling cable during the construction of a tower body;
(3) Hoisting arch rib sections by adopting a cable hoisting system, splicing sections of a main arch ring by section symmetrical cantilevers, installing the main arch ring construction sections after hoisting the sections to corresponding positions by the cable hoisting system, and connecting the sections of the overhanging main arch ring with a permanent buckling tower by using temporary buckling ropes until the main arch ring is closed;
(4) After the main arch ring is installed and closed, removing temporary buckling ropes, hoisting an overhead upright post by using a cable hoist system, erecting the overhead upright post according to a symmetrical and uniform principle, symmetrically proceeding from two sides to the midspan, and after the overhead upright post construction is completed, symmetrically and uniformly erecting a bridge deck system from an arch foot to the midspan, and simultaneously, constructing a single-tower cable-stayed bridge deck system and a stay cable to the abutment and the joint position of the bridge deck system of the arch bridge by a cantilever;
(5) The bridge deck system construction is completed, and the cable crane system is dismantled;
(6) And (3) installing bridge deck anti-collision guardrails, constructing bridge deck asphalt pavement and public structures, and forming a bridge.
By the above, the important factor that restricts the development of the arch bridge structure at present is the construction, the mountain area upper bearing arch bridge with the combination forever aims at the arch bridge construction difficulty, the 'forever combination' concept with good bridge landscape is introduced to solve the arch bridge construction problem, and meanwhile, the 'forever combination' design concept also improves the economical efficiency of the whole structure, improves the competitive advantage of the arch bridge and other bridge types during comparison, thereby promoting the development of the arch bridge technology. The method comprises the following steps:
firstly, according to the construction characteristics of the overhead arch bridge in mountainous areas, an arch abutment is utilized as a foundation of a permanent buckling tower, an arch rib is just connected with the permanent buckling tower through the arch abutment, the arch abutment is used as a shared foundation of a single-tower cable-stayed bridge and the arch bridge, the permanent buckling tower is firstly used as a bridge tower of the single-tower cable-stayed bridge after the bridge is formed, the permanent buckling tower can be used as a temporary cable-stayed buckling tower during the construction of a main arch ring cantilever and a tower column of a cable-stayed system, the cable-stayed system can be used for installing components such as a main arch ring, an overhead arch upright, a bridge deck system, an upper structure of the cable-stayed bridge and the like, and the construction method is a structure with good bridge landscape and can greatly reduce construction measure cost of the arch bridge; the permanent buckling tower uses the arch base as a foundation, the engineering scale of the lower tower column is equivalent to that of a junction pier of conventional design, and the manufacturing cost of the single-tower cable-stayed bridge is greatly reduced. The combined mountain area upper bearing arch bridge structure can meet different requirements of construction stage and bridge formation state structure.
And secondly, the permanent buckling tower is used as an important component of the arch ring construction diagonal buckling and hanging system, the permanent buckling tower is connected with the arch ring sections through temporary stay cables, and the support of the arch rings before the main arch rings are closed is provided. The permanent knot tower can also be used as the foundation of a cable hoist system, and compared with the temporary knot tower of the traditional cable hoist, the permanent knot tower has strong rigidity and bearing capacity, is an excellent cable hoist system foundation, can greatly improve the hoist capacity of the cable hoist system, is further beneficial to large-section and assembly construction, can greatly shorten the construction period, avoids the setting of the temporary knot tower, and improves the construction economy of the structure while reducing the damage to the environment.
Finally, the single-tower cable-stayed bridge formed by the permanent buckling tower, the stay cable and the main girder is based on the arch abutment, and the weight is applied to the arch abutment as vertical force, so that the anti-slip and anti-overturning stability of the arch abutment is facilitated, the scale of the arch abutment can be reduced, the damage of the arch abutment construction excavation to the environment is reduced, and the method is economical and environment-friendly.
In summary, in the construction method of the permanent-face combined mountain area upper bearing arch bridge structure, the permanent buckling tower is used as a bridge tower of a cable suspension system and is connected with the arch ring section through the temporary stay cable during construction, so that the support of the arch ring before the main arch ring is closed is provided, the lifting capacity of the cable suspension system can be improved, and the characteristics of high rigidity and high bearing capacity of the concrete bridge tower can be fully exerted; the single-tower cable-stayed bridge is based on the arch abutment, and the weight of the single-tower cable-stayed bridge is applied to the arch abutment as vertical force, so that the anti-slip and anti-overturning stability of the arch abutment is facilitated, the scale of the arch abutment can be reduced, the excavation engineering amount of the arch abutment construction is reduced, and the use efficiency of structural materials is improved.
Correspondingly, the invention provides a permanent temporary combined mountain area upper bearing arch bridge structure, which comprises an arch abutment and a bridge abutment which are taken as the foundation of a permanent buckling tower, wherein a lower permanent buckling tower column is positioned above the arch abutment and is connected with the top of the arch abutment into a whole, the upper end of the lower permanent buckling tower column is provided with a permanent buckling tower cross beam, and both sides of the permanent buckling tower cross beam are provided with upper permanent buckling tower columns;
a main arch ring is arranged between the two arch seats, and an arch upright post is erected at the upper end of the main arch ring;
and a bridge deck system is erected at the upper ends of the bridge abutment, the permanent buckling tower cross beam and the arch upper upright post.
Preferably, the lower permanent buckling tower column adopts a double-limb structure, the permanent buckling tower cross beam rigidly connects two limbs of the lower permanent buckling tower column into a whole at the top of the lower permanent buckling tower column, and a cantilever of the permanent buckling tower cross beam supports the upper permanent buckling tower column;
the lower tower column of the permanent buckling tower, the upper tower column of the permanent buckling tower and the cross beam of the permanent buckling tower are fixedly combined into a whole to form the permanent buckling tower.
The upper permanent buckling tower adopts a transverse bridge double-limb portal frame structure and is divided into a lower tower column, a cross beam and an upper tower column, wherein two column limbs of the lower tower column are combined with the permanent buckling tower cross beam at the pier top to form a portal frame structure, the upper tower column is arranged at the outer side of a cantilever arm of the permanent buckling tower cross beam, and the permanent buckling tower is connected with a main beam through a stay cable to form a single tower cable-stayed structure system; the permanent buckling tower uses the arch base as a foundation, the engineering scale of the lower tower column is equivalent to that of a junction pier of conventional design, and the manufacturing cost of the single-tower cable-stayed bridge is greatly reduced. The combined mountain area upper bearing arch bridge structure can meet different requirements of construction stage and bridge formation state structure.
The single-tower cable-stayed bridge is arranged on the two arch seats, so that the characteristic of strong crossing capacity of the single-tower cable-stayed bridge can be effectively utilized, overhead upright posts and bridge approach lower structures in the coverage range of the single-tower cable-stayed bridge are saved, the engineering scale is reduced, and meanwhile, the damage to mountain bodies on two sides is reduced. The reduction of the weight of the building on the arch has important significance for the development of the span of the arch bridge to a larger span. The load born by the arch can be adjusted by adjusting the span of the single-tower cable-stayed bridge, and the proper arch abutment design position can be selected by adjusting the rise of the main arch ring in a larger range, so that the characteristics can be flexibly applied to specific bridge structural design, and the optimal arch and cable-stayed bridge structural arrangement can be carried out under different topography and geological conditions. The maximum height of the upright post on the arch is greatly reduced, the design of the high upright post close to the arch springing is avoided, the stress condition of the upright post on the arch is improved, and the engineering economy is improved.
Compared with the prior art, the invention has the following advantages:
(1) Compared with the traditional supported arch bridge, the supported arch bridge structure in the mountain area combined permanently can optimize the structural construction mode and measures, flexibly adjust the span of the cable-stayed bridge according to different engineering project requirements, and is beneficial to improving the adaptability of the bridge to environmental conditions and increasing the bridge spanning capacity;
(2) The cable-stayed bridge tower is fully utilized as a 'permanent temporary combination' structure, the permanent structure is fully utilized as a part of construction measures, the setting of arch bridge construction measures is simplified, and better engineering economy is achieved;
(3) The permanent combined mountain area upper bearing arch bridge has better environmental friendliness, effectively reduces the engineering scale of the arch abutment and furthest reduces the damage to the environment.
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 required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a permanent combined mountainous area overhead arch bridge;
FIG. 2 is a schematic illustration of the placement of the abutment, permanent buckling tower and cable hoist system during the arch ring construction stage;
FIG. 3 is a schematic illustration of arch bridge construction and cable-stayed bridge deck system construction;
FIG. 4 is a schematic view of a permanent buckling tower construction;
in the figure: 1-arch abutment, 2-main arch ring, 3-permanent buckling tower lower tower column, 4-permanent buckling tower upper tower column, 5-stay cable, 6-permanent buckling tower beam, 7-bridge deck system, 8-arch upper upright post, 9-bridge abutment, 10-temporary buckling cable, 11-cable hanging system and 12-ground wire.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or groups thereof.
As introduced by the background technology, the prior art has the defects that (1) the horizontal thrust of the arch springing of the large-span arch bridge is large, the technical risk is increased, the safety of the structure is deteriorated, and the engineering economy is deteriorated; (2) The construction difficulty of the arch ring structure increases exponentially along with the increase of the span, and the increased construction measure cost also greatly reduces the economy of the arch bridge; (3) The cable-stayed buckling and hanging and cable hoisting systems commonly adopted in the construction of the large-span arch bridge are all of temporary structures, a temporary buckling tower structure is usually required to be built, the cable-stayed buckling and hanging and cable hoisting systems are also required to be dismantled after the construction is finished, and the design and construction difficulty of the temporary structure are increased; (4) The bridge span ratio of the arch bridge is generally between 1/5 and 1/4, the bridge structure height is large, the heights of the upright posts on the arch of the extra-large arch bridge, the main bridge approach transition piers and the bridge approach piers are higher, and the construction cost is obviously increased. In order to solve the technical problems, the application provides a permanent combined mountain area upper bearing arch bridge structure and a construction method thereof.
The method and structure of the present invention are further described below with reference to the accompanying drawings.
Example 1.
As shown in fig. 1 to 4, the construction method of the permanent combined mountain area overhead arch bridge structure comprises the following technical ideas: the arch abutment is used as a shared foundation of a permanent buckling tower and an arch bridge, the permanent buckling tower is a bridge tower of a single-tower cable-stayed bridge after the bridge is formed, and the arch abutment can also be used as a temporary cable-stayed buckling and hanging tower column of a cable-stayed system during the construction of a main arch ring cantilever, is a 'permanent temporary combination' structure, and is used for constructing a main girder of the single-tower cable-stayed bridge, namely an arch building after the construction of the arch ring is completed, and finally paving the main girder into the bridge. The construction method specifically comprises the following construction steps:
1. and (3) arch abutment construction, wherein the arch abutment 1 is arranged in a foundation layer with proper engineering geology below a ground line 12 through address investigation, an abutment 9 and an arch abutment foundation are excavated and cast in situ, the abutment 9 is used as a gravity anchorage of a two-shore side cable hoist system 11, and temporary buckling cable anchorage is constructed.
2. And constructing a lower tower column of the permanent buckling tower by adopting a sliding mode or a turnover mode on the arch support 1, constructing a cross beam 6 of the permanent buckling tower by taking a bracket, continuing to construct an upper tower column 4 of the permanent buckling tower by adopting the sliding mode or the turnover mode on the cross beam, installing a cable hanging system 11 on the top of the tower, and reserving a pre-buried hole of a temporary buckling cable 10 during the construction of a tower body.
3. With reference to fig. 2, the cable suspension system 11 is used for hoisting the arch rib segments, and the segments of the main arch ring 2 are assembled by symmetrical cantilevers segment by segment. The construction section of the main arch ring 2 is installed after being hoisted to the corresponding position by a cable hoist system 11, and the section of the overhanging main arch ring 2 is connected with a permanent buckling tower by using a temporary buckling cable 10 until the main arch ring 2 is closed.
4. As shown in fig. 2 and 3, after the main arch ring 2 is assembled and closed, the temporary buckling rope 10 is removed, the overhead columns 8 are hoisted by the cable hoist system 11, the overhead columns 8 are erected according to the principle of symmetry and uniformity, the construction of the overhead columns 8 is performed symmetrically from two sides to the midspan, and after the construction of the overhead columns 8 is completed, the bridge deck system 7 is erected symmetrically and uniformly from the arch feet to the midspan. Meanwhile, the cantilever construction is carried out on the single-tower cable-stayed bridge deck system 7 and the stay cable 5 to the position of the abutment 9 and the joint position of the single-tower cable-stayed bridge deck system and the arch bridge deck system.
5. The bridge deck system 7 construction is completed and the cable suspension system 11 is removed.
6. And (3) installing bridge deck anti-collision guardrails, constructing bridge deck asphalt pavement, public structures and the like, and forming a bridge.
Example 2.
As shown in fig. 1 and 2, the permanent combined mountain area upper bearing arch bridge structure comprises an arch abutment 1 serving as a foundation of a permanent buckling tower and a bridge abutment 9, wherein a lower permanent buckling tower column 3 is arranged above the arch abutment and is connected with the top of the arch abutment 1 into a whole, a permanent buckling tower cross beam 6 is arranged at the upper end of the lower permanent buckling tower column 3, and upper permanent buckling tower columns 4 are arranged at two sides of the permanent buckling tower cross beam 6; a main arch ring 2 is arranged between the two arch seats 1, and an arch upright post 8 is erected at the upper end of the main arch ring 2; a bridge deck system is erected on the upper ends of the bridge abutment 9, the permanent buckling tower cross beam 6 and the arch upper upright post 8.
The permanent buckling tower lower tower column 3 adopts a double-limb structure, the permanent buckling tower cross beam 6 rigidly connects two limbs of the permanent buckling tower lower tower column 3 into a whole at the pier top of the permanent buckling tower lower tower column 3, and a cantilever of the permanent buckling tower cross beam 6 supports the permanent buckling tower upper tower column 4; the lower tower column 3, the upper tower column 4 and the cross beam 6 are fixed together to form a permanent buckling tower.
The invention relates to a permanent combined mountain area upper bearing arch bridge structure which consists of two independent tower cable-stayed bridges and an arch bridge, wherein a main arch ring 2 is just connected with a lower tower column 3 of a permanent buckling tower through an arch base 1, the arch base 1 is used as a shared foundation of the independent tower cable-stayed bridges and the arch bridge, the permanent buckling tower is a bridge tower of the independent tower cable-stayed bridges after the bridge is formed, and the permanent buckling tower can also be used as a temporary cable-stayed buckling tower and a tower column of a cable crane system during the construction period of a cantilever of the main arch ring 2, and is a permanent combined structure, and the permanent buckling tower uses the arch base 1 as a foundation. Referring to fig. 2 and 3, the temporary buckling rope 10 and the cable hoist system 11 are all used as a foundation during the construction of the bridge structure.
With the combination of the arrangement of the single-tower cable-stayed bridge shown in fig. 1, the external load borne by the main arch ring 2 is reduced, the calculated span of the main arch ring 2 can be effectively improved, the arch bridge is pushed to develop to a large span, the load borne by the main arch ring 2 can be adjusted by adjusting the span of the single-tower cable-stayed bridge, the characteristic of flexible application in specific bridge structural design can be realized, and the optimal arch+cable-stayed bridge structural arrangement can be carried out under different topography geological conditions.
The single-tower cable-stayed bridge on the two arch seats can effectively utilize the characteristic of strong spanning capability of the single-tower cable-stayed bridge, reduce the weight of the building on the arch, play a role in reducing the external load born by the arch ring, and facilitate the large-span development of the span of the arch bridge; the single-tower cable-stayed bridge is based on the arch abutment, and the weight of the single-tower cable-stayed bridge is applied to the arch abutment as vertical force, so that the anti-slip and anti-overturning stability of the arch abutment is facilitated, the scale of the arch abutment can be reduced, the excavation engineering amount of the arch abutment construction is reduced, and the use efficiency of structural materials is improved.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (3)
1. The construction method of the permanent combined mountain area upper bearing arch bridge structure is characterized by comprising the following steps of:
(1) Setting an arch abutment in a foundation layer with proper engineering geology below a ground line through address investigation, excavating and cast-in-situ bridge abutment and an arch abutment foundation, taking the bridge abutment as a gravity anchorage of a two-bank side cable hoisting system, and constructing a temporary buckling cable anchorage;
(2) Constructing a lower tower column of the permanent buckling tower on the arch support by adopting a sliding mode or a turnover mode, constructing a cross beam of the permanent buckling tower by taking a bracket, constructing an upper tower column of the permanent buckling tower on the cross beam by continuing the sliding mode or the turnover mode, installing a cable hanging system on the top of the tower column, and reserving a pre-buried hole of a temporary buckling cable during the construction of a tower body;
(3) Hoisting arch rib sections by adopting a cable hoisting system, splicing sections of a main arch ring by section symmetrical cantilevers, installing the main arch ring construction sections after hoisting the sections to corresponding positions by the cable hoisting system, and connecting the sections of the overhanging main arch ring with a permanent buckling tower by using temporary buckling ropes until the main arch ring is closed;
(4) After the main arch ring is installed and closed, removing temporary buckling ropes, hoisting an overhead upright post by using a cable hoist system, erecting the overhead upright post according to a symmetrical and uniform principle, symmetrically proceeding from two sides to the midspan, and after the overhead upright post construction is completed, symmetrically and uniformly erecting a bridge deck system from an arch foot to the midspan, and simultaneously, constructing a single-tower cable-stayed bridge deck system and a stay cable to the abutment and the joint position of the bridge deck system of the arch bridge by a cantilever;
(5) The bridge deck system construction is completed, and the cable crane system is dismantled;
(6) And (3) installing bridge deck anti-collision guardrails, constructing bridge deck asphalt pavement and public structures, and forming a bridge.
2. The permanent temporary combined mountain area upper bearing arch bridge structure for implementing the construction method of claim 1 is characterized by comprising an arch abutment and a bridge abutment which are taken as the foundation of a permanent buckling tower, wherein a lower permanent buckling tower column is positioned above the arch abutment and is connected with the top of the arch abutment into a whole, the upper end of the lower permanent buckling tower column is provided with a permanent buckling tower beam, and two sides of the permanent buckling tower beam are provided with upper permanent buckling tower columns;
a main arch ring is arranged between the two arch seats, and an arch upright post is erected at the upper end of the main arch ring;
and a bridge deck system is erected at the upper ends of the bridge abutment, the permanent buckling tower cross beam and the arch upper upright post.
3. The permanent temporary combined mountain area upper bearing arch bridge structure of claim 2, wherein the lower permanent buckling tower column adopts a double-limb structure, the permanent buckling tower cross beam rigidly connects two limbs of the lower permanent buckling tower column into a whole at the top of the lower permanent buckling tower column, and a cantilever of the permanent buckling tower cross beam supports the upper permanent buckling tower column;
the lower tower column of the permanent buckling tower, the upper tower column of the permanent buckling tower and the cross beam of the permanent buckling tower are fixedly combined into a whole to form the permanent buckling tower.
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