Construction structure for continuous steel beam to span existing railway

Abstract

The utility model relates to the technical field of railway construction, and particularly discloses a construction structure for a continuous steel beam to span an existing railway, which comprises a bearing mechanism, a supporting mechanism and a steel beam, the bearing mechanism comprises a rail and a steel sleeper, the steel sleeper is laid on the lower surface of the rail, a longitudinal beam is mounted on the upper surface of the steel sleeper, and a cross beam and a supporting mechanism are arranged on the lower surface of the rail; the supporting mechanism comprises cast-in-situ bored piles and manual hole digging piles, and the cast-in-situ bored piles are arranged at the two ends of the cross beam; the bearing mechanism with the longitudinal beams and the cross beams and the supporting mechanism with the cast-in-situ bored piles and the manual hole digging piles are arranged, the cast-in-situ bored piles are used as buttresses, and the I-shaped steel auxiliary beams are used as an overhead system formed by the longitudinal beams and the cross beams, so that the road can pass through the existing railway; compared with conventional jacking construction, cost is reduced, efficiency is improved, a series of problems that in traditional jacking construction, efficiency is low, cost is high, construction precision is difficult to control and the like can be solved, and potential safety hazards of uncontrollable factors in trenchless construction can be reduced to a great extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway construction, and in particular relates to a construction structure used for continuous steel beams spanning existing railways. Background Art

[0002] In recent years, with the deepening of the "Strong Transportation Country" strategy, the national road network construction has become increasingly perfect, and highways and urban roads often pass under existing railways. In order not to interrupt the operation of existing railways, reduce the workload of relocating above-ground and underground obstacles, speed up the progress of engineering construction, and ensure the safety of surrounding buildings and structures, the traditional open-cut cast-in-place and chamfered construction technologies are increasingly unable to meet the needs of engineering construction. Instead, they are replaced by rapidly developing jacking construction. However, due to the high cost, low efficiency, great safety hazards, difficulty in construction monitoring, and difficulty in controlling construction accuracy of jacking construction at this stage, the application space and development prospects of jacking construction are obviously limited.

[0003] To this end, those skilled in the art have proposed a construction structure for continuous steel beams spanning existing railways to solve the problems raised by the background art. Utility Model Content

[0004] The utility model aims to provide a construction structure for a continuous steel beam to cross an existing railway, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A structure for constructing a continuous steel beam across an existing railway, comprising:

[0007] A bearing mechanism, the bearing mechanism comprising rails and steel sleepers, the steel sleepers are laid on the lower surface of the rails, longitudinal beams are installed on the upper surface of the steel sleepers, and cross beams are arranged on the lower surface of the steel sleepers;

[0008] The supporting mechanism comprises bored cast-in-place piles and manually dug piles. Bored cast-in-place piles are arranged at both ends of the crossbeam, and the manually dug piles are arranged below the steel sleeper.

[0009] Preferably, a bolt connection assembly is provided between the longitudinal beam and the steel sleeper, the longitudinal beam is fixedly connected to the steel sleeper via the bolt connection assembly, and the steel sleeper is fixedly connected to the rail via reinforcing bolts.

[0010] Preferably, the longitudinal beam is formed by splicing I-beams, and the splicing of the longitudinal beam is fastened and fixed by high-strength bolts.

[0011] Preferably, a sleeper is arranged between the steel sleeper and the cross beam, an angle steel limiter is embedded in the upper surface of the bored pile, and the angle steel limiter is in contact with the cross beam.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) The utility model provides a bearing mechanism with longitudinal beams and transverse beams and a supporting mechanism with bored cast-in-place piles and artificially excavated bored piles, and uses an overhead system formed by bored cast-in-place piles as piers and I-beams as longitudinal beams and transverse beams to realize the crossing of a road across an existing railway. Compared with conventional jacking construction, the utility model reduces costs and increases efficiency, and can solve a series of problems existing in conventional jacking construction, such as low efficiency, high cost, and difficulty in controlling construction accuracy. It can greatly reduce the safety hazards of uncontrollable factors in trenchless construction. The utility model is designed to be overhead for existing railways and cross existing railways. It has good integrity, high rigidity, and good seismic resistance. It is particularly suitable for sections with poor foundations and has good application prospects.

[0014] (2) The utility model sets longitudinal beams and transverse beams formed by splicing I-beams. Before the overhead bridge is erected, steel sleepers should be installed in advance. Steel sleepers are inserted between two concrete sleepers. Each steel sleeper is connected and fastened to the rail so that the entire railway is located on the steel sleepers. Then, longitudinal beams are erected at both ends of the steel sleepers. The longitudinal beams are spliced ​​by I-beams. The splicing of the longitudinal beams is fastened with high-strength bolts. Each steel sleeper is also fastened and fastened to the longitudinal beams with high-strength bolts. Then, a large cross beam is inserted at the pier of each bored pile so that each longitudinal beam falls on the transverse beam to form an overhead bridge system. Finally, under the condition of slow railway movement, foundation pit excavation and cast-in-place main box culvert are carried out to realize the passage of urban roads under the existing railway. The artificial bored piles are bored by manual excavation, thick reinforced concrete wall protection technology is adopted, and commercial concrete is adopted. The pile is transported by an overhead pump. When each bored pile is poured with concrete, two channel steels are inserted at the top of the bored pile as limit piles to limit the vertical displacement of the longitudinal beam. The bored piles are constructed by automobile circulation drilling and hole-forming technology. Mud is used to protect the wall and discharge the debris during the drilling process. The hole is cleaned in time after formation and the steel cage is lowered. Concrete should be poured in time after the steel cage is positioned. When pouring concrete, emphasis should be placed on the control of the pile top elevation. Before pouring concrete, the pile top elevation should be marked with red paint on the steel cage to facilitate the control of the pile top elevation when pouring concrete. When each bored pile is poured with concrete, four channel steels are inserted at the top of the pile as limit piles to limit the lateral movement of the beam. The insertion depth is consistent with the longitudinal beam. In this way, the existing rails can be suspended, which is stable and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a left view of the utility model;

[0017] Figure 3 It is a front view of the utility model;

[0018] Figure 4 It is a top view of the utility model.

[0019] In the figure: 1. bearing mechanism; 2. supporting mechanism; 3. rails; 4. steel sleepers; 5. longitudinal beams; 6. bolt connection components; 7. sleepers; 8. cross beams; 9. bored piles; 10. manually excavated piles. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0021] See also Figure 1-Figure 4 As shown, a structure for constructing a continuous steel beam across an existing railway includes:

[0022] The bearing mechanism 1 comprises a rail 3 and a steel sleeper 4, wherein the steel sleeper 4 is laid on the lower surface of the rail 3, a longitudinal beam 5 is installed on the upper surface of the steel sleeper 4, and a cross beam 8 is arranged on the lower surface of the steel sleeper 4;

[0023] The supporting mechanism 2 includes bored cast-in-place piles 9 and manually dug piles 10 . Bored cast-in-place piles 9 are arranged at both ends of the crossbeam 8 , and the manually dug piles 10 are arranged below the steel sleeper 4 .

[0024] As can be seen from the above, the device realizes the crossing of the road across the existing railway by setting a bearing mechanism 1 with longitudinal beams 5 and transverse beams 8 and a supporting mechanism 2 with bored cast-in-place piles 9 and manually excavated bored piles 10, and utilizing the bored cast-in-place piles 9 as piers and the I-beam temporary beams as the longitudinal beams 5 and the transverse beams 8 to form an overhead system; compared with conventional jacking construction, it reduces costs and increases efficiency, can solve a series of problems existing in traditional jacking construction such as low efficiency, high cost, and difficult to control construction accuracy, and can greatly reduce the safety hazards of uncontrollable factors in trenchless construction. The device is designed to be overhead for the existing railway and crosses the existing railway. It has good integrity, high rigidity, and good seismic resistance. It is particularly suitable for sections with poor foundations and has good application prospects. Example

[0025] refer to Figures 1 to 4 As shown, a bolt connection assembly 6 is provided between the longitudinal beam 5 and the steel sleeper 4, the longitudinal beam 5 is fixedly connected to the steel sleeper 4 through the bolt connection assembly 6, and the steel sleeper 4 is fixedly connected to the rail 3 through reinforcing bolts.

[0026] Specifically, the longitudinal beam 5 is formed by splicing I-beams, and the splicing of the longitudinal beam 5 is fastened and fixed by high-strength bolts.

[0027] Specifically, a sleeper 7 is arranged between the steel sleeper 4 and the cross beam 8 , and an angle steel limiter is buried on the upper surface of the bored pile 9 , and the angle steel limiter is in contact with the cross beam 8 .

[0028] As can be seen from the above, by setting the longitudinal beams 5 and cross beams 8 formed by splicing I-beam temporary beams, steel sleepers 4 should be installed in advance before overhead construction, and steel sleepers 4 should be installed between two concrete sleepers. Each steel sleeper 4 is connected and fastened to the rail 3 so that the entire railway is located on the steel sleepers 4, and then longitudinal beams 5 are installed at both ends of the steel sleepers 4. The longitudinal beams 5 are spliced ​​by I-beam temporary beams, and the splicing of the longitudinal beams 5 is tightened and fixed with high-strength bolts. Each steel sleeper 4 is also connected and fastened to the longitudinal beams 5 with high-strength bolts. Then, a large cross beam is installed at the pier of each bored pile 9, so that each longitudinal beam 5 falls on the cross beam 8 to form an overhead bridge system. Finally, under the condition of slow railway operation, foundation pit excavation and cast-in-place main box culvert are carried out to realize the passage of urban roads under the existing railway. Among them, the artificial bored piles 10 are drilled by artificial excavation, and thick reinforced concrete wall protection technology is adopted. The concrete is delivered by a commercial concrete pump. When each bored pile 10 is poured with concrete, two channel steels are inserted at the top of the bored pile 10 as limit piles to limit the vertical displacement of the longitudinal beam 5. The bored pile 9 is constructed by a process of automobile circulation drilling and hole formation. Mud is used to protect the wall and discharge the slag during the drilling process. The hole is cleaned in time after the hole is formed, and the steel cage is lowered. Concrete should be poured in time after the steel cage is positioned. When pouring concrete, emphasis should be placed on the control of the pile top elevation. Before pouring concrete, the pile top elevation is marked with red paint on the steel cage in advance to facilitate the control of the pile top elevation when pouring concrete. When each cast-in-place pile is poured with concrete, a total of four channel steels are inserted at the top of the pile as limit piles to limit the lateral movement of the crossbeam 8. The insertion depth is consistent with the longitudinal beam 5. The existing rails 3 can be overhead, which has stability and safety.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction structure for a continuous steel beam spanning an existing railway, characterized in that: include: A bearing mechanism (1), the bearing mechanism (1) comprising a rail (3) and a steel sleeper (4), the steel sleeper (4) being laid on the lower surface of the rail (3), a longitudinal beam (5) being installed on the upper surface of the steel sleeper (4), and a cross beam (8) being arranged on the lower surface of the steel sleeper (4); A support mechanism (2), the support mechanism (2) comprising bored cast-in-place piles (9) and manually excavated piles (10), the bored cast-in-place piles (9) being arranged at both ends of the crossbeam (8), and the manually excavated piles (10) being arranged below the steel sleeper (4).

2. The construction structure for continuous steel beams spanning existing railways according to claim 1, characterized in that: A bolt connection assembly (6) is provided between the longitudinal beam (5) and the steel sleeper (4); the longitudinal beam (5) is fixedly connected to the steel sleeper (4) via the bolt connection assembly (6); and the steel sleeper (4) is fixedly connected to the rail (3) via reinforcing bolts.

3. The construction structure for continuous steel beams spanning existing railways according to claim 1, characterized in that: The longitudinal beam (5) is formed by splicing I-beams, and the splicing of the longitudinal beam (5) is fastened and fixed by high-strength bolts.

4. The construction structure for continuous steel beams spanning existing railways according to claim 1, characterized in that: A sleeper (7) is arranged between the steel sleeper (4) and the cross beam (8), and an angle steel stopper is embedded in the upper surface of the bored cast-in-place pile (9), and the angle steel stopper is in contact with the cross beam (8).

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