Novel D-shaped auxiliary beam reinforcing system

Abstract

The utility model discloses a novel D-shaped auxiliary beam reinforcing system which comprises supporting pile sets located on the left side and the right side, a first pile foundation bracket platform is arranged on the supporting pile set on the left side, a second pile foundation bracket platform is arranged on the supporting pile set on the right side, and steel box beams are arranged on the first pile foundation bracket platform and the second pile foundation bracket platform. A D-shaped auxiliary beam and a railway line track are arranged on the steel box beam. The upper steel box girder has the advantages of being convenient to machine and dismantle, and the deflection of the steel box girder can be reduced as much as possible. The supporting piles, the pile foundation bracket bearing platforms and the connecting components of the lower structure meet the construction standard of an adjacent business line and are not limited by complex geological conditions such as the higher underground water level. Compared with the existing D-shaped auxiliary beam reinforcing system, the novel D-shaped auxiliary beam reinforcing system has the advantages that the slow running time required by the novel D-shaped auxiliary beam reinforcing system is greatly reduced, the influence on the operation of the railway is small, and the novel D-shaped auxiliary beam reinforcing system has great operation advantages.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway engineering, and specifically relates to a novel D-type temporary beam reinforcement system. Background Art

[0002] With the rapid development of national infrastructure construction, there will be more and more intersections between new urban road projects and existing railways. The construction plan of building an underpass frame bridge has less impact on the surrounding environment, lower construction costs and better results.

[0003] The frame bridge can continue to operate the existing railway line during the construction of the underpass, which greatly reduces the impact of the underpass frame bridge construction on the social economy. Among them, the stability of the line reinforcement system is the key to ensure the smooth progress of the underpass project. The continuous effect of the train load on the reinforcement system will inevitably lead to the settlement of the operating line. Excessive settlement will not only affect the normal operation of the train, but also endanger the lives of on-site construction workers.

[0004] The D-type temporary beam is a standardized product with a reasonable structure and high safety. It fully meets the load-bearing requirements. Without interrupting driving, the D-type temporary beam can use the lower space after being elevated to excavate and construct the bridge culvert, and it is easy to install and disassemble and can be recycled. The lower support of the D-type temporary beam is often in the form of a fulcrum pile, and the fulcrum pile foundation is about 2.0m away from the center of the line. Due to the small distance, in order to ensure the normal operation of the existing line, the form of artificial bored pile foundation is often adopted. However, the area where the underpass frame project is located is a high water level and the geological conditions are poor. The fulcrum piles are long and artificial bored piles cannot be constructed. Since the line spacing of double-track railways is usually 10m or less, the pile foundation construction between lines cannot be completed.

[0005] Therefore, there is an urgent need for a new type of D-type temporary beam reinforcement system in the prior art to make the line reinforcement scheme design more stable, safe and economical. Summary of the invention

[0006] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a novel D-type temporary beam reinforcement system.

[0007] The technical solution of the utility model is: a novel D-type temporary beam reinforcement system, including supporting pile groups located on left and right sides, a first pile foundation corbel platform is arranged on the left supporting pile group, a second pile foundation corbel platform is arranged on the right supporting pile group, steel box beams are arranged on the first pile foundation corbel platform and the second pile foundation corbel platform, and the steel box beams are arranged with D-type temporary beams and railway line tracks.

[0008] Furthermore, both sides of the steel box girder are respectively connected to the first pile foundation corbel platform and the second pile foundation corbel platform through connecting components.

[0009] Furthermore, the left supporting pile group and the right supporting pile group have the same structure and are bilaterally symmetrical.

[0010] Furthermore, the left supporting pile group and the right supporting pile group each include three supporting piles, and the three supporting piles are distributed in a triangle shape.

[0011] Furthermore, the connecting member includes anchoring steel bars, through holes are formed in the top plate and the bottom plate of the steel box girder, slots are formed at corresponding positions of the first pile foundation corbel platform and the second pile foundation corbel platform, the anchoring steel bars are inserted into the slots through the through holes, and anchor glue is poured at the slots for fixing.

[0012] Furthermore, concrete is poured into the hollow positions on both sides of the cross diaphragm at the support point of the steel box girder.

[0013] Furthermore, the spacing between the support piles is greater than 2.5 times the diameter of the support piles.

[0014] Furthermore, the anchoring steel bars in the connecting member are arranged in an array.

[0015] Furthermore, the cross-sections of the first pile foundation corbel platform and the second pile foundation corbel platform are octagonal.

[0016] The beneficial effects of the utility model are as follows:

[0017] The upper steel box girder of the utility model is easy to process and dismantle, and can reduce the deflection of the steel box girder as much as possible. The supporting piles, pile foundation corbel caps and connecting components of the lower structure meet the construction standards of the adjacent operating line and are not restricted by complex geological conditions such as high groundwater levels.

[0018] The upper steel box girder of the utility model has a large span, and the supporting piles can be designed outside the railway track limit, so bored piles can be used instead of artificial bored piles.

[0019] Compared with the existing D-type temporary beam reinforcement system, the new D-type temporary beam reinforcement system requires significantly less slow travel time, has less impact on railway operations, and has great operational advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an elevation view of the utility model;

[0021] Figure 2 It is a plan view of the utility model;

[0022] Figure 3 It is a cross-sectional view of the utility model;

[0023] Figure 4 It is a cross-sectional view of the connecting member in the utility model;

[0024] Figure 5 It is a plan view of the connecting member in the utility model;

[0025] in:

[0026] 1 Support pile 2 First pile foundation bracket platform

[0027] 3 Second pile foundation bracket platform 4 Steel box beam

[0028] 5 Connecting member 6 D-type beam

[0029] 7 Railway track 8 High-strength nuts

[0030] 9 Concrete 10 Anchor steel bars. DETAILED DESCRIPTION

[0031] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments:

[0032] like Figures 1 to 5 As shown, a novel D-type temporary beam reinforcement system includes supporting pile groups located on left and right sides, a first pile foundation corbel platform 2 is arranged on the left supporting pile group, and a second pile foundation corbel platform 3 is arranged on the right supporting pile group, a steel box beam 4 is arranged on the first pile foundation corbel platform 2 and the second pile foundation corbel platform 3, and a D-type temporary beam 6 and a railway line track 7 are arranged on the steel box beam 4.

[0033] Both sides of the steel box girder 4 are connected to the first pile foundation corbel platform 2 and the second pile foundation corbel platform 3 respectively through connecting members 5 .

[0034] The left supporting pile group and the right supporting pile group have the same structure and are bilaterally symmetrical.

[0035] The left supporting pile group and the right supporting pile group each include three supporting piles 1, and the three supporting piles 1 are distributed in a triangle shape.

[0036] The connecting member 5 includes an anchoring steel bar 10. Through holes are formed in the top plate and the bottom plate of the steel box girder 4. Slots are formed at corresponding positions of the first pile foundation corbel platform 2 and the second pile foundation corbel platform 3. The anchoring steel bar 10 passes through the through holes and is inserted into the slots. Anchoring glue is poured at the slots for fixing.

[0037] Concrete 9 is poured into the hollow positions on both sides of the support diaphragm in the steel box girder 4.

[0038] The spacing between the support piles 1 is greater than 2.5 times the diameter of the support piles 1 .

[0039] The anchoring steel bars 10 in the connecting member 5 are arranged in an array.

[0040] The cross-sections of the first pile foundation corbel platform 2 and the second pile foundation corbel platform 3 are octagonal.

[0041] Specifically, the protruding section of the anchor steel bar 10 is provided with a high-strength nut 8.

[0042] Specifically, the connecting member 5 is located between three supporting piles in the vertical direction.

[0043] Specifically, the calculated span of the steel box girder 4 is related to the railway construction limit and the safety limit of the operating line equipment.

[0044] More specifically, when reinforcing a single-track railway, the minimum safe distance between the support pile 1 and the center line of the railway line is 6.9m+d / 2 (d is the diameter of the support pile).

[0045] More specifically, when reinforcing a double-track railway, considering that the railway centerline spacing is generally 5.0 m, the minimum calculated span of the steel box girder 4 is 18.6+d.

[0046] More specifically, when the line spacing is 10.0 m, the minimum calculated span of the steel box girder 4 is 23.6+d. The cross-sectional dimensions of the steel box girder 4 are determined by finite element calculation to determine the minimum cross-sectional width and the minimum cross-sectional height.

[0047] Specifically, the height of the first pile foundation corbel platform 2 and the second pile foundation corbel platform 3 is the distance from the bottom of the steel box girder 4 to the top of the bored pile of the supporting pile 4. The height is controlled by comprehensively considering various factors, and the general height is 1.6m.

[0048] More specifically, the first pile foundation corbel platform 2 and the second pile foundation corbel platform 3 are octagonal, 4.5m wide and 7.6m long. The front cantilever of the corbel is 3.5m long and 0.9-1.6m thick. 12.6cm channel steel is driven into both sides of the corbel, and 12.6cm×12.6cm square timber is set to protect the ballast on both sides, and Ⅰ28b I-beam cross braces are set between the channel steels.

[0049] Specifically, the support piles 1 are constructed using a low-profile drilling rig, the diameter of the support piles 1 is 1.25 m, and the pile length is calculated based on the actual load and geological conditions of the D-shaped temporary beam 6. Three support piles 1 are arranged on the first pile foundation corbel platform 2 and the second pile foundation corbel platform 3, respectively. The support piles are arranged in a triangle, and the distance between the piles is not less than 2.5 times the diameter of the support piles.

[0050] Specifically, after the steel box girder 4 is pushed into place, the connecting member 5 is drilled at intervals of 0.3m in the longitudinal and transverse directions on the top and bottom plates on both sides of the fulcrum diaphragm of the steel box girder 4. Slots are made at the positions of the first pile foundation corbel platform 2 and the second pile foundation corbel platform 3, with a depth of 1.2m. φ32 steel bars are inserted from the top plate of the steel box girder into the slots of the pile foundation corbel cap, and rebar embedding glue is poured into the slots. Concrete is poured into the hollow positions of the steel box girder on both sides of the fulcrum diaphragm, and the steel box girder 4 is connected to the first pile foundation corbel platform 2 and the second pile foundation corbel platform 3 into a whole.

[0051] The installation process of the utility model includes the following steps:

[0052] A. Construction of support pile 1 outside the railway line. Support pile 1 adopts impact drilling technology, and buried casing for drilling construction. The center of support pile 1 is 7.4m away from the center line of the railway, and the center distance between the two pile foundations is 2.5D (pile foundation diameter);

[0053] B. Arrange D16 type temporary beam at the axis of the steel box beam, and the support point of the D type temporary beam is located on the temporary sleeper pile on the shoulder; after the formwork and cast-in-place pile foundation are completed, erect the D16 type temporary beam and select one side of the crown beam as the traction reaction seat;

[0054] C. Hollow out the subgrade soil where the steel box girder is located, connect the steel strand to the front end of the steel box girder, and insert the steel strand into the jack on the traction side;

[0055] D. Use the jack to pull the steel box girder to the position. After the steel box girder is in place, install the end connection structure of the steel box girder, refill the gap between the surrounding steel box girder and the roadbed soil with concrete, remove the D16 type temporary beam, and restore the line;

[0056] E. Use the steel box girder in place as the support point for the longitudinal beam, and install the D-type temporary beam at the same time; temporary sleeper piles are used as the side support points for the D16m type temporary beam, and placed on the roadbed; after jacking into place, remove the D-type temporary beam and restore the line.

[0057] The upper steel box girder of the utility model is easy to process and dismantle, and can reduce the deflection of the steel box girder as much as possible. The supporting piles, pile foundation corbel caps and connecting components of the lower structure meet the construction standards of the adjacent operating line and are not restricted by complex geological conditions such as high groundwater levels.

[0058] The upper steel box girder of the utility model has a large span, and the supporting piles can be designed outside the railway track limit, so bored piles can be used instead of artificial bored piles.

[0059] Compared with the existing D-type temporary beam reinforcement system, the new D-type temporary beam reinforcement system requires significantly less slow travel time, has less impact on railway operations, and has great operational advantages.

Claims

1. A new type of D-type temporary beam reinforcement system, characterized by: The invention comprises supporting pile groups located on the left and right sides, wherein a first pile foundation corbel platform (2) is arranged on the left supporting pile group, and a second pile foundation corbel platform (3) is arranged on the right supporting pile group, and steel box beams (4) are arranged on the first pile foundation corbel platform (2) and the second pile foundation corbel platform (3), and a D-shaped temporary beam (6) and a railway track (7) are arranged on the steel box beam (4).

2. According to claim 1, a novel D-type temporary beam reinforcement system is characterized in that: Both sides of the steel box girder (4) are respectively connected to the first pile foundation corbel platform (2) and the second pile foundation corbel platform (3) through connecting components (5).

3. According to claim 2, a novel D-type temporary beam reinforcement system is characterized in that: The left supporting pile group and the right supporting pile group have the same structure and are bilaterally symmetrical.

4. According to claim 3, a novel D-type temporary beam reinforcement system is characterized in that: The left supporting pile group and the right supporting pile group each comprise three supporting piles (1), and the three supporting piles (1) are distributed in a triangular shape.

5. According to claim 2, a novel D-type temporary beam reinforcement system is characterized in that: The connecting member (5) comprises anchoring steel bars (10), through holes are formed in the top plate and the bottom plate of the steel box girder (4), slots are formed at corresponding positions of the first pile foundation corbel platform (2) and the second pile foundation corbel platform (3), the anchoring steel bars (10) are inserted into the slots through the through holes, and anchoring glue is poured at the slots for fixing.

6. A novel D-type temporary beam reinforcement system according to claim 5, characterized in that: Concrete (9) is poured into the hollow positions on both sides of the cross diaphragm at the middle support of the steel box girder (4).

7. According to claim 4, a novel D-type temporary beam reinforcement system is characterized in that: The spacing between the support piles (1) is greater than 2.5 times the diameter of the support piles (1).

8. According to claim 5, a novel D-type temporary beam reinforcement system is characterized in that: The anchoring steel bars (10) in the connecting member (5) are arranged in an array.

9. The novel D-type temporary beam reinforcement system according to claim 1 is characterized in that: The cross-sections of the first pile foundation corbel platform (2) and the second pile foundation corbel platform (3) are octagonal.

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