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CN-115948978-B - Permanent-face combined bridge for erosion road sections along river channel in mountain area and construction method

CN115948978BCN 115948978 BCN115948978 BCN 115948978BCN-115948978-B

Abstract

The invention provides a permanent combined bridge for a mountain area along a river channel erosion section and a construction method thereof, wherein a temporary bridge adopts a first disposal structure and a second disposal structure which are respectively arranged at two sections of roadbeds to be communicated, two ends of a first steel strand are respectively connected with the first disposal structure and the second disposal structure by adopting a prestress anchor, one end of I-steel is embedded into the mountain, and the intersection of the first steel strand and the I-steel is connected by a lock catch; and then, paving steel plates on the I-steel layer surface, arranging anti-skid screw bars and arranging steel cable railings to form a temporary bridge for rapidly treating and keeping through, allowing pedestrians and vehicles to pass through, and realizing the requirements of rescue tasks. After the rescue work is finished, the bridge is further reinforced on the basis of the temporary bridge, the small box girders are paved according to actual needs and are communicated with the original highway, and the corresponding number of steel buttresses are arranged according to design needs to form a permanently used bridge, so that the original temporary bridge does not need to be dismantled, and the efficiency and the utilization rate are improved.

Inventors

  • CHEN JING
  • LONG YI
  • ZHOU XINGQIANG
  • LUO HUAN
  • DING YAO

Assignees

  • 四川省交通建设集团有限责任公司

Dates

Publication Date
20260505
Application Date
20230227

Claims (9)

  1. 1. The temporary bridge for the mountain area along the river road erosion road section is used for communicating the road section of an original road bed erosion, and is characterized by comprising a first disposal structure (1), a second disposal structure (2), a plurality of first steel strands (3) and a plurality of I-steel (4), wherein the first disposal structure (1) and the second disposal structure (2) are respectively arranged at two road beds to be communicated, a plurality of first steel strands (3) are horizontally arranged at intervals, and the two ends of each first steel strand (3) are respectively connected with the first disposal structure (1) and the second disposal structure (2) by adopting a prestress anchor (5); the I-steel (4) is horizontally arranged on the first steel strands (3) at intervals, the I-steel (4) is perpendicular to the first steel strands (3), one end of the I-steel (4) is embedded into the mountain (6), and the intersection of the first steel strands (3) and the I-steel (4) is connected through the lock catch (7); the two steel cable rails (8) are symmetrically arranged along the central line of the road base, two ends of the steel cable rails (8) are respectively connected with the first treatment structure (1) and the second treatment structure (2), and the middle part of the steel cable rails (8) is connected with the I-steel (4); A layer of steel plates (9) are horizontally spliced on the I-shaped steel (4), and the two ends of each steel plate (9) along the direction of the road base are connected with the original highway, wherein anti-skid patterns are arranged on the upper surface of each steel plate (9), and each steel plate (9) is positioned between two steel cable rails (8); the first treatment structure (1) is identical to the second treatment structure (2) and is arranged symmetrically to each other; the first disposal structure (1) comprises a concrete buttress (10), a concrete ground anchor (11) and a concrete floor (12), wherein the concrete buttress (10) and the concrete ground anchor (11) are arranged at intervals, the concrete buttress (10) is arranged at the end part of an erosion section of an original roadbed, the concrete ground anchor (11) is embedded into the original roadbed, and the concrete floor (12) is connected with the top ends of the concrete buttress (10) and the concrete ground anchor (11); The two ends of the first steel strand wires (3) sequentially penetrate through the concrete buttress (10), the concrete floor (12) and the concrete ground anchor (11), and the prestressed anchorage device (5) is embedded into one end, far away from the concrete buttress (10), of the concrete ground anchor (11).
  2. 2. Temporary bridge for mountain area along river course erosion section according to claim 1, characterized in that said steel cable railing (8) comprises two concrete posts (81), several steel posts (82) and several second steel strands (83), two said concrete posts (81) are cast integrally with two said concrete piers (10) respectively, several said steel posts (82) are arranged on several said i-beams (4) at intervals; The second steel strands (83) are horizontally arranged and distributed at intervals vertically, two ends of each second steel strand (83) are respectively connected with two concrete columns (81) through prestressed anchors (5), and each second steel strand (83) is respectively fixed with a plurality of section steel columns (82) through a plurality of lock catches (7).
  3. 3. Temporary bridge for mountain area along river course erosion section according to claim 2, characterized in that the lock catch (7) comprises a U-shaped clamp (71), a steel wire rubber sleeve (72), a spring washer (73) and a nut (74), wherein the first steel strand (3) and the second steel strand (83) are respectively sleeved with a plurality of steel wire rubber sleeves (72) at intervals, and the steel wire rubber sleeves (72) are arranged at the inner bottoms of the notches of the U-shaped clamp (71); The U-shaped clamp is characterized in that a plurality of groups of fixing holes are formed in the I-shaped steel (4) and the profile steel upright post (82) in pairs, spring gaskets (73) are sleeved at two ends of the U-shaped clamp (71) through the fixing holes, and a plurality of nuts (74) are connected to two ends of the U-shaped clamp in a threaded mode.
  4. 4. A temporary bridge for a mountain area along a river channel erosion section according to claim 3, wherein a plurality of deformed bars (13) are arranged on the steel plate (9) at intervals, and the deformed bars (13) are parallel to the i-steel (4).
  5. 5. The temporary bridge for the mountain area along the river channel erosion road section is characterized by further comprising a small box girder (14), a steel cap girder (15) and steel buttresses (16), wherein the steel buttresses (16) are arranged between the two concrete buttresses (10), the steel cap girder (15) is arranged at the top of the steel buttresses (16), the top of the steel cap girder (15) supports the I-shaped steel (4) and the first steel strand wires (3) through basin-shaped supports, and the small box girder (14) is paved on a steel plate (9) along the road base trend.
  6. 6. The permanent combined bridge for the mountain area along the river channel erosion section according to claim 5, wherein the steel buttress (16) is formed by vertically stacking and connecting a plurality of steel casings (17), and a concrete column is poured in an inner cavity of the steel casings (17); and a concrete base (18) is integrally poured at the bottom of the steel buttress (16).
  7. 7. A construction method of a permanent temporary bonding bridge for a mountain area along a river channel erosion section, which adopts the permanent temporary bonding bridge for the mountain area along the river channel erosion section according to claim 6, and is characterized by comprising the following steps: S1, conveying a digging machine and a crusher to a road section which cannot be communicated with a vehicle by adopting a boat bridge, simultaneously digging an anchoring foundation pit on two sections of road surfaces, then placing a reinforcement cage in the anchoring foundation pit and pouring a concrete ground anchor (11), and reserving a plurality of holes at the top of the concrete ground anchor (11); S2, cleaning mud stones of the erosion section through a ship, cleaning the sections of the two sections of roadbed, hoisting a reinforcement cage to the section of the original roadbed, fixing the reinforcement cage to the section of the original roadbed through anchor rods, closing a mould immediately, fully filling concrete to form a concrete buttress (10), and reserving a plurality of holes at the top of the concrete buttress (10); s3, sequentially enabling two ends of the first steel strands (3) to simultaneously penetrate through holes of concrete buttresses (10) on two sides and holes of concrete ground anchors (11), and tensioning the first steel strands (3) by adopting a prestress anchorage device (5) and fixing the first steel strands with the concrete ground anchors (11); s4, closing a mould and pouring a concrete floor (12), wherein a plurality of first steel strands (3) and the concrete floor (12) are integrally poured; S5, drilling holes at intervals on one side of a mountain (6) along a plane where the plurality of first steel strands (3) are located, inserting one ends of the plurality of I-beams (4) into the drilled holes, and vertically fixing the I-beams (4) and the corresponding first steel strands (3) by adopting a lock catch (7); S6, a steel plate (9) is paved on the I-steel (4) and fixed with the I-steel (4), the steel plate (9) is connected with original roadbed at two ends, and a plurality of screw thread steel bars (13) are welded on the steel plate (9) at intervals; s7, respectively pouring concrete upright posts (81) at the left end and the right end of the two concrete buttresses (10) integrally, symmetrically welding two rows of steel upright posts (82) on the I-steel (4) along the trend of the road, respectively tightening and fixing a plurality of second steel strands (83) with the concrete upright posts (81) at the two sides of the road through a prestress anchorage device (5), and fixing a plurality of second steel strands (83) with the corresponding steel upright posts (82) through a lock catch (7); S8, pouring one or more groups of concrete bases (18) between the two concrete piers (10) according to design requirements, vertically arranging steel pile casings (17) on the concrete bases (18), and pouring concrete in the steel pile casings (17) to form steel piers (16); S9, arranging a steel capping beam (15) on the steel buttress (16), and arranging a plurality of basin-type support I-beams (4) and first steel strands (3) on the steel capping beam (15); S10, paving small box girders (14) with corresponding groups on the steel plates (9) according to the number of the steel buttresses (16), paving bridge deck systems on the small box girders (14), and paving and communicating two sections of highways with the bridge deck systems.
  8. 8. The construction method of the permanent combined bridge for the mountain area along the river channel erosion section according to claim 7, wherein the distance between the adjacent I-shaped steels (4) is 50cm, and the distance between the adjacent first steel strands (3) is 25cm.
  9. 9. The construction method of the forever combined bridge for the mountain area along the river road erosion section according to claim 7, wherein a plurality of steel wire rubber sleeves (72) are required to be sleeved on the first steel strand (3) and the second steel strand (83) before the first steel strand (3) and the second steel strand (83) are installed.

Description

Permanent-face combined bridge for erosion road sections along river channel in mountain area and construction method Technical Field The invention relates to the technical field of road and bridge construction, in particular to a permanent combined bridge for a mountain area along a river road erosion section and a construction method. Background The highway built according to mountain, especially the highway section of mountain and river on one side, after landslide or mud-rock flow erosion damage highway subgrade of mountain, need to be fast to handle and ensure, and because newly build road subgrade or bridge in collapse department, the degree of difficulty is big, and the time is long, is difficult to satisfy the needs of the traffic rescue in the short time to and when following temporary change permanent use, traditional mode process is complicated, need demolish interim bridge in a large number, leads to the low scheduling problem of utilization ratio. Disclosure of Invention The invention aims to provide a permanent combined bridge and a construction party for a mountain area along a river channel erosion road section, which solve the problems that after landslide or debris flow erosion damages a highway subgrade, the roadbed or the bridge needs to be quickly treated and protected, the roadbed or the bridge is newly built at a collapse place, the difficulty is high, the time is long, the requirement of traffic rescue in a short time is difficult to meet, and when the bridge is used for a later time, the conventional method has complex procedures, a large number of temporary bridges need to be removed, the utilization rate is low and the like. The temporary bridge is used for communicating the section of the original roadbed which is eroded, and comprises a first disposal structure, a second disposal structure, a plurality of first steel strands and a plurality of I-shaped steels, wherein the first disposal structure and the second disposal structure are respectively arranged at two sections of roadbeds to be communicated, the plurality of first steel strands are horizontally arranged at intervals, and both ends of the first steel strands are respectively connected with the first disposal structure and the second disposal structure by adopting prestress anchors; The I-steel wires are horizontally arranged on the first steel stranded wires at intervals, the I-steel wires are perpendicular to the first steel stranded wires, one end of each I-steel wire is embedded into a mountain, and the intersection of each first steel stranded wire and each I-steel wire is connected through a lock catch; the two steel cable rails are symmetrically arranged along the central line of the road base, two ends of the steel cable rails are respectively connected with the first treatment structure and the second treatment structure, and the middle part of the steel cable rails is connected with the I-steel; The steel plates are horizontally spliced on the I-shaped steel, two ends of the steel plates along the trend of the roadbed are connected with the original highway, anti-skid patterns are arranged on the upper surfaces of the steel plates, and the steel plates are positioned between two steel cable rails. Further, the first treatment structure and the second treatment structure are identical and are symmetrically arranged; The first disposal structure comprises a concrete buttress, a concrete ground anchor and a concrete floor, wherein the concrete buttress and the concrete ground anchor are arranged at intervals, the concrete buttress is arranged at the end part of an erosion section of an original roadbed, the concrete ground anchor is embedded and arranged in the original roadbed, and the concrete floor is connected with the top ends of the concrete buttress and the concrete ground anchor; The two ends of the first steel strand sequentially penetrate through the concrete buttress, the concrete floor and the concrete ground anchor, and the prestressed anchorage device is embedded into one end, far away from the concrete buttress, of the concrete ground anchor. Further, the steel cable railing comprises two concrete upright posts, a plurality of steel upright posts and a plurality of second steel strands, wherein the two concrete upright posts are respectively integrally poured with the two concrete buttresses, and the plurality of steel upright posts are arranged on the plurality of I-shaped steel at intervals; The second steel strands are horizontally arranged and distributed along the vertical interval, two ends of each second steel strand are respectively connected with two concrete columns through prestressed anchorage devices, and each second steel strand is respectively fixed with a plurality of section steel columns through a plurality of lock catches. Further, the lock catch comprises a U-shaped clamp, steel wire rubber sleeves, a spring gasket and nuts, wherein a plurality of steel wire rubber sleeves are s