Frame bridge structure passing through existing railway underneath

Abstract

The utility model discloses an existing railway underneath passing frame structure bridge structure which comprises a plurality of frame structure bridge outer cylinder sections which are connected in series along the axis to form an outer cylinder unit, and no partition or partition exists in a cylinder body of the outer cylinder unit. A plurality of frame-structure bridge inner cylinder sections connected in series along the axis form an inner cylinder unit, the inner cylinder unit is arranged in a cylinder body of the outer cylinder unit in a penetrating mode, the interior of each frame-structure bridge inner cylinder section is divided into a plurality of inner cylinder subareas through inner cylinder plate bodies, the cylinder body of each frame-structure bridge inner cylinder section is provided with a plurality of grouting hole channels, and the grouting hole channels communicate with the inner side and the outer side of the corresponding frame-structure bridge inner cylinder section. The structure can be applied to a jacking type construction method of a large-span frame structure bridge structure, in the jacking type construction process, a construction and unearthing machine advances in the outer cylinder section of the frame structure bridge in a barrier-free mode, and the construction efficiency is improved. The frame structure bridge inner barrel section which is separated and completed in advance can be transferred to the preset position in the frame structure bridge outer barrel section, and the construction period is greatly shortened.

Description

Technical Field

[0001] The utility model relates to the field of underground structure construction, and more specifically, to a frame bridge structure passing under an existing railway. Background Art

[0002] With the continuous advancement of urbanization, municipal road projects are also increasing. How to continue the development of road traffic under the existing railway and transportation system is also one of the important issues to be faced. A frame bridge is a structure in which a highway passes under an adjacent railway. Its main structure is a box-shaped frame. Frame bridges have the advantages of occupying less space, being convenient to construct, and not affecting the transportation above. At present, due to the rapid development of urban transportation construction, the number of frame bridge projects passing under railways is also increasing.

[0003] The jacking method for bridge and culvert construction emerged in the 1970s, starting with a single-hole one-time jacking method, and then continuously developed to large-diameter, large-span, double-hole, multi-hole and other forms. The jacking construction process has gradually evolved from one-side jacking to jacking and pulling method, single-side traction method, relay method, two-side jacking method, etc. In recent years, there have been many technical improvements to the jacking method. For example, the invention patent with authorization announcement number CN106894350B discloses a steel blade corner jacking box culvert device and construction method, which adds a steel blade corner to the front end of the box culvert structure jacked in the soil. During the jacking process, construction machinery and transportation equipment traveling in the box culvert structure are used for excavation. The structure and method effectively prevent the lateral collapse of the box culvert roadbed and ensure the safety and reliability of the box culvert jacking construction.

[0004] However, the above structure is suitable for box culvert structures without partitions and partitions. For frame bridge structures, there are multiple load-bearing or non-load-bearing partition wall components for the purpose of dividing lanes or other functional considerations. If the partition wall components are constructed in advance during this process, the efficiency of mechanical excavation and excavation in the box culvert will be greatly affected. If the partition wall components are constructed after the box culvert construction is completed, the overall construction period will also be increased. Therefore, it is necessary to propose a frame bridge structure that is suitable for the jacking method and can be quickly constructed to pass under the existing railway. Summary of the invention

[0005] One purpose of the utility model is to provide a frame bridge structure that passes under an existing railway, which can effectively shorten the working time of subsequent secondary construction of partition walls while ensuring the efficiency of jacking construction.

[0006] In order to achieve these purposes and other advantages according to the utility model, according to one aspect of the present invention, the present invention provides a frame bridge structure for passing under an existing railway, which comprises:

[0007] Multiple box culvert outer cylinder segments connected in series along the axis form an outer cylinder unit. There are no partitions or compartments inside the cylinder body of the outer cylinder unit. Multiple box culvert inner cylinder segments connected in series along the axis form an inner cylinder unit. The inner cylinder unit is inserted into the cylinder body of the outer cylinder unit. Each box culvert inner cylinder segment is divided into several inner cylinder compartments by inner cylinder plates. The cylinder body of the box culvert inner cylinder segment is provided with a number of grouting channels, and the grouting channels communicate with both the inside and outside of the box culvert inner cylinder segment; a grouting space is formed between the inner cylinder unit and the outer cylinder unit, and an inter-cylinder grouting belt is filled between the inner cylinder unit and the outer cylinder unit.

[0008] Preferably, the top of the box culvert outer cylinder segment is arched.

[0009] Preferably, one end of the box culvert outer cylinder segment is retracted inward along the outer periphery to form an outer cylinder tongue-and-groove portion, and a ring-shaped steel plate extends axially outward along the outer periphery at the other end of the box culvert outer cylinder segment. The ring-shaped steel plates of adjacent box culvert outer cylinder segments are matched and wrapped around the outer periphery of the outer cylinder tongue-and-groove portion.

[0010] Preferably, more than one waterstop rubber band is provided around the outer cylinder tongue-and-groove portion, and its width is greater than the annular gap formed after the splicing of any two adjacent box culvert outer cylinder segments.

[0011] Preferably, several splicing joint grouting channels are provided in the outer cylinder tongue-and-groove portion. The splicing joint grouting channels communicate with both the inside and outside of the outer cylinder tongue-and-groove portion, and a ring-shaped grouting waterstop belt is poured between the matching ring-shaped steel plate and the outer cylinder tongue-and-groove portion.

[0012] Preferably, several track grooves are axially provided at the bottom of the inner wall of the box culvert outer cylinder segment. A number of roller shafts are spaced and placed in each track groove. The axis of the roller shaft is horizontally arranged, and the top of the roller shaft is higher than the track groove. The bottom of the box culvert inner cylinder segment is slidably supported by several roller shafts.

[0013] The utility model has at least the following beneficial effects:

[0014] The utility model adopts the structural form that the box culvert inner cylinder segment is sleeved inside the box culvert outer cylinder segment. During the process of the box culvert outer cylinder segment being pushed forward with the front steel cutting edge, it does not affect the working efficiency of the internal excavation and soil removal machinery. The inner box culvert inner cylinder segment is processed simultaneously and the construction of the inner cylinder plates therein is completed. When all the box culvert outer cylinder segments are installed, the inner box culvert inner cylinder segments are pulled or pushed one by one to the predetermined positions, and then grouting is completed between the inner and outer cylinders for fixation. While not affecting the jacking and excavation efficiency, it greatly reduces the secondary construction time of the partition wall structure.

[0015] Other advantages, objectives and features of the utility model will be partially reflected by the following description, and partially will be understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0016] Figure 1 It is the overall schematic diagram of the structure of the box culvert bridge passing under the existing railway in a technical solution of the present utility model;

[0017] Figure 2 It is the front and back schematic diagrams of the outer cylinder section of the box culvert bridge in the structure of the box culvert bridge passing under the existing railway in a technical solution of the present utility model;

[0018] Figure 3 It is the schematic diagram of the inner cylinder section of the box culvert bridge in the structure of the box culvert bridge passing under the existing railway in a technical solution of the present utility model;

[0019] Figure 4 It is the side view of the structure of the box culvert bridge passing under the existing railway in a technical solution of the present utility model;

[0020] Figure 5 It is the schematic diagram of the joint of the outer cylinder socket part of the box culvert bridge in the structure of the box culvert bridge passing under the existing railway in a technical solution of the present utility model;

[0021] Figure 6 It is the sectional view of the structure of the box culvert bridge passing under the existing railway in a technical solution of the present utility model;

[0022] Figure 7 It is the matching schematic diagram of the outer cylinder section and the inner cylinder section of the box culvert bridge in the structure of the box culvert bridge passing under the existing railway in a technical solution of the present utility model.

[0023] Legend: 1 - steel cutting edge, 2 - outer cylinder section of box culvert bridge, 3 - inner cylinder section of box culvert bridge, 20 - grouting hole channel at the joint, 21 - outer cylinder socket part, 210 - annular grouting water stop belt, 22 - annular steel plate, 23 - track groove, 24 - roller, 25 - water stop rubber belt, 30 - inner cylinder partition, 31 - grouting hole channel, 32 - inner cylinder plate body, 310 - inter - cylinder grouting belt. Detailed implementation manners

[0024] The following further elaborates on the present utility model in conjunction with the attached drawings and specific implementation manners, so that those skilled in the art can implement it with reference to the text of the specification.

[0025] It should be understood that the terms such as "having", "including", and "comprising" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0026] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the structures and components can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0027] like Figures 1 to 7 As shown, the utility model provides a frame bridge structure that passes under an existing railway, comprising: a plurality of frame bridge outer cylinder segments 2 connected in series along an axis to form an outer cylinder unit, the cylinder body of the outer cylinder unit has no partitions and partitions, a plurality of frame bridge inner cylinder segments 3 connected in series along an axis to form an inner cylinder unit, the inner cylinder unit is arranged in the cylinder body of the outer cylinder unit, each frame bridge inner cylinder segment 3 is divided into a plurality of inner cylinder partitions 30 by an inner cylinder plate body 32, a plurality of grouting channels 31 are opened in the cylinder body of the frame bridge inner cylinder segment 3, the grouting channels 31 are connected to the inner and outer sides of the frame bridge inner cylinder segment 3; an inter-cylinder grouting belt 310 is filled between the frame bridge inner cylinder segment 3 and the frame bridge outer cylinder segment 2. In the technical scheme, the construction site is set on one side of the railway roadbed that has been reinforced, and a jacking foundation is prepared and a jacking device is set according to a conventional jacking construction method. The cylinder segment 2 is a square tubular reinforced concrete structure cast in advance in a prefabricated component processing plant. The width of the outer cylinder segment 2 of the frame bridge is the total design width of the frame bridge passing under the railway. The front end of the outer cylinder segment 2 of the frame bridge is matched and connected with a steel blade angle 1. The steel blade angle 1 is a steel lattice frame assembled by steel plates. The purpose is to effectively cut into the soil and bear the load of the soil above and around when pushing into the roadbed. Optionally, a hydraulic device can be added between the steel blade angle 1 and the first section of the outer cylinder segment 2 of the frame bridge for pushing. The outer cylinder segments 2 of the frame bridge are placed one by one and push the front segment into the soil together under the action of the external jacking device. The reinforcement design and concrete grade used in the outer cylinder segment 2 of the frame bridge ensure that no local crushing occurs under jacking. There are no partition walls or other structures in the outer cylinder unit that can hinder mechanical excavation and transportation of earth.

[0028] In this technical solution, the inner barrel segment 3 of the frame bridge is a tubular reinforced concrete structure processed in a precast component processing factory or other areas on site. During the process of pushing the outer barrel segments 2 of the frame bridge forward one by one, the construction of the inner barrel plate 32 in the inner barrel segment 3 of the frame bridge can be carried out. The inner barrel plate 32 can be constructed synchronously in the form of precast plates, on-site masonry, or formwork casting. Both the inner barrel segment 3 and the inner barrel plate 32 of the frame bridge are non-load-bearing components sleeved inside the outer barrel segment 2 of the frame bridge, and can be made thinner in terms of component size and thickness. After the construction of the outer barrel segment 2 of the frame bridge is completed, the inner barrel segment 3 of the frame bridge with the inner barrel plate 32 already constructed is pulled into place one by one inside the outer barrel unit through jacking or traction equipment. The grouting ducts 31 opened at the bottom, top, left, and right sides of the inner barrel segment 3 of the frame bridge connect the inside and outside of the inner barrel segment 3 of the frame bridge. After all the inner barrel segments 3 of the frame bridge are installed in place, grouting is carried out manually from inside the inner barrel segment 3 of the frame bridge into the gap between the inner barrel segment 3 of the frame bridge and the outer barrel segment 2 of the frame bridge. After the grouting material solidifies and reaches the design strength, the overall construction of the frame bridge is completed.

[0029] In this technical solution, the inner barrel segment 3 of the frame bridge is a non-load-bearing component. The purpose is that during the construction of the outer barrel segment 2 of the frame bridge, which is a load-bearing component, the partition walls, road surfaces, wall surfaces, cable trays, installation equipment, etc. in the frame bridge can be constructed synchronously. At the joint position formed after the abutting and fitting between any two inner barrel segments 3 of the frame bridge, it is manually blocked with materials such as templates and sponge strips before the subsequent construction of the inter-barrel grouting belt 310 to prevent slurry leakage. The inner barrel partitions 30 formed by the inner barrel plates 32 between the inner barrel segments 3 of the frame bridge are the partition areas such as each vehicle lane, sidewalk partition, and pipeline channel in the frame bridge.

[0030] In this technical solution, the jacking and earth excavation of the outer barrel segment 2 of the frame bridge are carried out synchronously with the internal construction of the inner barrel segment 3 of the frame bridge. The outer barrel segment 2 of the frame bridge is a load-bearing component, and an arch design can be carried out at the top. The inner barrel segment 3 of the frame bridge can be transported into the outer barrel segment 2 of the frame bridge by applying the construction method of building translation and form an integral body with the outer barrel segment 2 of the frame bridge after grouting.

[0031] In another technical solution, the top of the outer barrel segment 2 of the frame bridge is arched. The arched outer barrel segment 2 of the frame bridge can better bear the load transmitted from above.

[0032] In another technical solution, one end of the outer cylinder section 2 of the box culvert bridge is retracted inward along the outer periphery to form an outer cylinder tongue-and-groove portion 21, and a ring-shaped steel plate 22 extends axially outward from the outer periphery of the other end of the outer cylinder section 2 of the box culvert bridge. The ring-shaped steel plates 22 of adjacent outer cylinder sections of the box culvert bridge are matched and wrapped around the outer periphery of the outer cylinder tongue-and-groove portion 21. In addition to the function of guiding the positioning of the pipe sections, the matched ring-shaped steel plate 22 and the outer cylinder tongue-and-groove portion 21 can also form an anti-leakage effect at the splicing position of the two connected outer cylinder sections 2 of the box culvert bridge.

[0033] In another technical solution, one or more waterstop rubber bands 25 are provided around the outer cylinder tongue-and-groove portion 21, and the width thereof is greater than the annular gap formed after the splicing of any two adjacent outer cylinder sections 2 of the box culvert bridge. The waterstop rubber band 25 can effectively seal the gap and form a better waterstop effect.

[0034] In another technical solution, several grouting hole channels 20 for splicing are provided in the outer cylinder tongue-and-groove portion 21. The grouting hole channels 20 for splicing communicate the inner and outer sides of the outer cylinder tongue-and-groove portion 21. A ring-shaped grouting waterstop belt 210 is poured between the matched ring-shaped steel plate 22 and the outer cylinder tongue-and-groove portion 21. The ring-shaped grouting waterstop belt 210 and the waterstop rubber band 25 jointly play an anti-leakage effect.

[0035] In another technical solution, several track grooves 23 are axially provided at the bottom of the inner wall of the outer cylinder section 2 of the box culvert bridge. A plurality of roller shafts 24 are spaced and placed in each track groove 23. The axis of the roller shaft 24 is horizontally arranged, and the top of the roller shaft 24 is higher than the track groove 23. The bottom of the inner cylinder section 3 of the box culvert bridge can be slidably supported by several roller shafts 24. In this technical solution, the inner cylinder section 3 of the box culvert bridge is placed on the roller shafts 24 and is pulled by a traction device until the predetermined position. The bottom of the inner cylinder section 3 of the box culvert bridge also needs to be locally strengthened according to the track grooves 23 to avoid damage during the pulling process.

[0036] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. Underpass the existing railway frame bridge structure, characterized by: include: A plurality of frame bridge outer tube segments connected in series along the axis form an outer tube unit, and there is no partition or division inside the outer tube unit; A plurality of frame bridge inner cylinder segments connected in series along the axis form an inner cylinder unit, the inner cylinder unit is arranged in the cylinder body of the outer cylinder unit, each frame bridge inner cylinder segment is divided into a plurality of inner cylinder partitions by an inner cylinder plate body, the cylinder body of the frame bridge inner cylinder segment is provided with a plurality of grouting channels, and the grouting channels are connected to the inner and outer sides of the frame bridge inner cylinder segment; A grouting space is formed between the inner tube unit and the outer tube unit, and an inter-tube grouting zone is filled between the inner tube unit and the outer tube unit.

2. The frame bridge structure under an existing railway as claimed in claim 1, characterized in that: The top of the outer tube segment of the frame bridge is arched.

3. The frame bridge structure under an existing railway as claimed in claim 1, characterized in that: One end of the outer tube segment of the frame bridge is contracted inward along the outer circumference to form an outer tube tongue and groove portion, and the other end of the outer tube segment of the frame bridge has an annular steel plate extending axially outward from the outer circumference, and the annular steel plates of adjacent outer tube segments of the frame bridge are matched and covered on the outer circumference of the outer tube tongue and groove portion.

4. The frame bridge structure under an existing railway as claimed in claim 3 is characterized in that: The outer tube tongue and groove portion is provided with one or more water-stopping rubber belts around its periphery, and its width is greater than the annular gap formed after any two adjacent frame bridge outer tube segments are spliced ​​together.

5. The frame bridge structure for underpass existing railway as claimed in claim 4, characterized in that: The outer tube tongue and groove part is provided with a plurality of grouting holes at the joints, and the grouting holes at the joints are connected to the inner and outer sides of the outer tube tongue and groove part, and an annular grouting water stop is poured between the matching annular steel plate and the outer tube tongue and groove part.

6. The frame bridge structure under an existing railway as claimed in claim 1, characterized in that: The bottom of the inner wall of the outer cylinder segment of the frame bridge is axially provided with several track grooves, and several rollers are placed in each track groove at intervals. The axes of the rollers are arranged horizontally, and the tops of the rollers are higher than the track grooves. The bottom of the inner cylinder segment of the frame bridge is slidably supported by the several rollers.

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