CN220057674U - Crack control device for jacking box culvert of underpass railway - Google Patents
Crack control device for jacking box culvert of underpass railway Download PDFInfo
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- CN220057674U CN220057674U CN202320901059.2U CN202320901059U CN220057674U CN 220057674 U CN220057674 U CN 220057674U CN 202320901059 U CN202320901059 U CN 202320901059U CN 220057674 U CN220057674 U CN 220057674U
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- box culvert
- anchor
- jacking
- left end
- plate
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- 210000002435 tendon Anatomy 0.000 claims abstract description 34
- 238000004873 anchoring Methods 0.000 claims abstract description 22
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 210000003205 muscle Anatomy 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 239000011083 cement mortar Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of box culverts and discloses a crack control device for a downward-penetrating railway jacking box culvert, which comprises a corrugated pipe positioned in the box culvert, wherein one end of the corrugated pipe is sleeved with an anchoring mechanism, one end of a guiding mechanism is provided with a tensioning mechanism, and a plurality of prestressed tendons are jointly penetrated through the inside of the corrugated pipe, the anchoring mechanism, the guiding mechanism and the tensioning mechanism. According to the utility model, the prestressed tendons are arranged in the box culvert, so that the box culvert can be effectively cracked in the jacking process; by arranging the anchoring mechanism and the spiral ribs at one end of the box culvert, the local compressive stress of the box culvert can be prevented from being overlarge, so that the box culvert is broken in the tensioning process; each prestressed tendon is guided by a guide mechanism, so that the mutual interference of a plurality of prestressed tendons in the tensioning process can be prevented; through open slot, rib and kicking block on tensioning mechanism, can be when hollow jack is retracted, automatic release the instrument anchor plate, convenient and fast, the practicality is strong.
Description
Technical Field
The utility model relates to the technical field of box culverts, in particular to a crack control device for a downward-penetrating railway jacking box culvert.
Background
Along with the rapid development of the foundation construction of China, a series of interchange projects with crossing railways and highways appear in the railway construction process; as one of the main solutions, under-highway railways are widely used; the existing railway trunk overpass engineering is penetrated under the whole jacking technology of the prefabricated box culvert, and the method has the greatest advantages that the reinforced concrete box culvert prefabricated in the working pit is jacked into the railway subgrade directly by jacking equipment on the premise of ensuring the safe operation of the railway line, so that the overpass engineering penetrating through the railway is formed.
The Chinese patent discloses a box culvert structure (grant bulletin No. CN 216515734U) for underpass existing railway engineering, the technology of the patent utilizes bored piles to enhance the safety of the foundation pit structure of the box culvert, and utilizes plain concrete layers to enhance the connection strength of the box culvert and the bored piles; the double-pipe jet grouting pile is utilized to further strengthen the structural strength of the foundation pit, collapse of the periphery of the foundation of the box culvert is avoided, stress of a construction template laid on the foundation of the box culvert is balanced, construction quality is guaranteed, but in the jacking process of the box culvert of the underpass railway frame, the crack resistance of the box culvert often does not meet related standard requirements due to the influence of large eccentric compression, and accordingly the box culvert is cracked in the jacking process.
Disclosure of Invention
The utility model aims to provide a device for controlling a crack of a box culvert jacked by a underpass railway so as to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a lower through railway jack-in box culvert crack controlling means, includes the bellows that is located the inside of box culvert, the one end of bellows has cup jointed anchoring mechanism, the outside of anchoring mechanism has cup jointed the spiral muscle, and installs guiding mechanism in the one end of anchoring mechanism, tensioning mechanism is installed to guiding mechanism's one end, the inside of bellows, anchoring mechanism, guiding mechanism and tensioning mechanism is run through jointly and is provided with a plurality of prestressing tendons; the guide mechanism comprises a limiting plate and a guide plate corresponding to the limiting plate, a plurality of guide pipes are arranged in the center position between the limiting plate and the guide plate, a plurality of split bolts are fixedly arranged on the outer sides of the guide pipes between the limiting plate and the guide plate, and an upper through hole and a lower through hole are respectively formed in the upper end and the lower end of the inner side of the limiting plate.
As still further aspects of the utility model: the tensioning mechanism comprises a hollow jack, the hollow jack comprises an oil cylinder barrel and a hollow piston rod, a tension sensor is mounted on the outer sides of the oil cylinder barrel and the hollow piston rod, the right end of the oil cylinder barrel is fixedly connected with a supporting frame through a bolt, a group of jacking blocks are connected on the outer side of the left end of the oil cylinder barrel through hinge rotation, a group of open slots corresponding to the jacking blocks are formed in the outer side of the left end of the hollow piston rod, a tool anchor plate is embedded in the inner side of the hollow piston rod from the left end, a tool clamping piece is embedded in the inner side of the tool anchor plate from the left end, and a group of ribs corresponding to the open slots are fixedly connected on the outer side of the tool anchor plate.
As still further aspects of the utility model: the right-hand member of support frame is located the left end of deflector, and support frame and deflector pass through split bolt fixed connection.
As still further aspects of the utility model: the anchoring mechanism comprises an anchor backing plate and a working anchor plate embedded in the inner side of the anchor backing plate from the left end, the right end of the anchor backing plate is fixedly connected with a horn pipe, the inner side of the working anchor plate is embedded with a plurality of working clamping pieces from the left end, the upper end and the lower end of the inner side of the anchor backing plate are respectively provided with an exhaust hole and a grouting hole, and the left end of the grouting hole is connected with a grouting pipe in a meshed mode.
As still further aspects of the utility model: the exhaust hole and the grouting hole are both communicated with the horn pipe, the grouting pipe penetrates through the inner side of the lower through hole, and the grouting hole is communicated with the upper through hole.
As still further aspects of the utility model: the utility model discloses a box culvert, including box culvert, the box culvert is located the inside of box culvert, and the left end embedding of bellows is on the right side of box culvert, the anchor backing plate is located the right-hand member of box culvert, the outside at the box culvert is cup jointed to the spiral muscle.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the prestressed tendons are arranged in the box culvert, so that the box culvert can be effectively cracked in the jacking process; by arranging the anchoring mechanism and the spiral ribs at one end of the box culvert, the local compressive stress of the box culvert can be prevented from being overlarge, so that the box culvert is broken in the tensioning process; each prestressed tendon is guided by a guide mechanism, so that the mutual interference of a plurality of prestressed tendons in the tensioning process can be prevented; through open slot, rib and kicking block on tensioning mechanism, can be when hollow jack is retracted, automatic release the instrument anchor plate, convenient and fast, the practicality is strong.
Drawings
FIG. 1 is a schematic diagram of a crack control device for a box culvert of a underpass railway jack-in;
FIG. 2 is a schematic diagram of an exploded construction of an anchoring mechanism in a crack control device for a underpass railway jack-in box culvert;
FIG. 3 is a schematic structural view of a guiding mechanism in a crack control device for a push-through box culvert of a underpass railway;
FIG. 4 is a schematic diagram of an exploded construction of a tensioning mechanism in a crack control device for a underpass railway jack-in box culvert;
FIG. 5 is a schematic diagram of the operation of a crack control device for a box culvert of a underpass railway jack-in;
fig. 6 is an enlarged schematic view of the portion a in fig. 5.
In the figure: 1. a tensioning mechanism; 11. a hollow jack; 12. a support frame; 13. a tension sensor; 14. an open slot; 15. a tool clamping piece; 16. a tool anchor plate; 17. a rib; 18. a top block; 2. a guide mechanism; 21. a limiting plate; 22. a guide plate; 23. a split bolt; 24. a lower through hole; 25. an upper through hole; 26. a guide tube; 3. an anchoring mechanism; 31. an anchor backing plate; 32. grouting holes; 33. a horn tube; 34. an exhaust hole; 35. working anchor plates; 36. a working clamping piece; 37. grouting pipe; 4. spiral ribs; 5. a bellows; 6. prestress rib; 7. and (5) box culvert.
Detailed Description
Referring to fig. 1 to 6, in the embodiment of the utility model, a crack control device for jacking a box culvert of a downward-penetrating railway comprises a corrugated pipe 5 positioned in a box culvert 7, wherein one end of the corrugated pipe 5 is sleeved with an anchoring mechanism 3, the outer side of the anchoring mechanism 3 is sleeved with a spiral rib 4, one end of the anchoring mechanism 3 is provided with a guiding mechanism 2, one end of the guiding mechanism 2 is provided with a tensioning mechanism 1, and a plurality of prestress ribs 6 are jointly arranged in the corrugated pipe 5, the anchoring mechanism 3, the guiding mechanism 2 and the tensioning mechanism 1 in a penetrating manner;
in fig. 1 to 3, the anchoring mechanism 3 comprises an anchor backing plate 31 and a working anchor plate 35 embedded in the inner side of the anchor backing plate 31 from the left end, the right end of the anchor backing plate 31 is fixedly connected with a horn tube 33, the inner side of the working anchor plate 35 is embedded with a plurality of working clamping pieces 36 from the left end, the upper end and the lower end of the inner side of the anchor backing plate 31 are respectively provided with an exhaust hole 34 and a grouting hole 32, the left end of the grouting hole 32 is connected with a grouting pipe 37 in a meshed manner, the exhaust hole 34 and the grouting hole 32 are communicated with the horn tube 33, the grouting pipe 37 penetrates through the inner side of the lower through hole 24, the grouting hole 32 is communicated with the upper through hole 25, the prestressed tendons 6 sequentially penetrate through the inner sides of the horn tube 33, the anchor backing plate 31, the working anchor plate 35 and the working clamping pieces 36 in the anchoring mechanism 3, after the prestressed tendons 6 are tensioned, the external cement mortar pumping pipes are connected with the grouting pipe 37, cement mortar can enter the horn tube 33 through the grouting tube 37 and the grouting hole 32 in sequence and then enter the corrugated tube 5, gas escapes from the exhaust hole 34, tension is applied to the box culvert 7 through the prestressed tendons 6, the box culvert 7 is subjected to compressive stress and is deformed to a certain extent, the load born by the box culvert 7 is met, the box culvert 7 is prevented from being cracked due to tension in the jacking process, the horn tube 33 is positioned in the box culvert 7, the left end of the corrugated tube 5 is embedded in the right side of the horn tube 33, the anchor backing plate 31 is positioned at the right end of the box culvert 7, the spiral tendons 4 are sleeved on the outer side of the horn tube 33, a groove matched with the working anchor plate 35 is formed in the right end of the limiting plate 21, the left end of the working anchor plate 35 is embedded in the groove, when the prestressed tendons 6 are tensioned, the limiting plate 21 limits the working clamping pieces 36, the working clamping pieces 36 are prevented from moving rightwards along with the prestressed tendons 6, and then drops from working anchor plate 35, stretches mechanism 1 when stretching, stretches prestressing tendons 6, improves box culvert 7 right-hand member's intensity through anchor backing plate 31, horn pipe 33 and spiral muscle 4, prevents box culvert 7's local compressive stress too big, leads to its fracture such as split.
In fig. 1, 2 and 4, the guiding mechanism 2 includes a limiting plate 21 and a guiding plate 22 corresponding to the limiting plate 21, a plurality of guiding pipes 26 are arranged at the central position between the limiting plate 21 and the guiding plate 22, a plurality of split bolts 23 are fixedly arranged between the limiting plate 21 and the guiding plate 22 and positioned at the outer sides of the guiding pipes 26, an upper through hole 25 and a lower through hole 24 are respectively formed at the upper end and the lower end of the inner side of the limiting plate 21, the inner sides of the limiting plate 21, the guiding pipes 26 and the guiding plate 22 are sequentially penetrated by the tendon 6 in the guiding mechanism 2, and the tendon 6 is guided by the guiding mechanism 2, so that the mutual interference among the tendon 6 can be prevented.
In fig. 1, 2, 5 and 6, the tensioning mechanism 1 comprises a hollow jack 11, the hollow jack 11 comprises an oil cylinder barrel and a hollow piston rod, a tension sensor 13 is commonly installed outside the oil cylinder barrel and the hollow piston rod, the right end of the oil cylinder barrel is fixedly connected with a support frame 12 through bolts, the outer side of the left end of the oil cylinder barrel is rotatably connected with a group of jacking blocks 18 through hinges, the outer side of the left end of the hollow piston rod is provided with a group of open slots 14 corresponding to the jacking blocks 18, the inner side of the hollow piston rod is embedded with a tool anchor plate 16 from the left end, the inner side of the tool anchor plate 16 is embedded with a tool clamping piece 15 from the left end, the outer side of the tool anchor plate 16 is fixedly connected with a group of ribs 17 corresponding to the open slots 14, the right end of the support frame 12 is positioned at the left end of a guide plate 22, the support frame 12 and the deflector 22 are fixedly connected through the split bolts 23, the prestressed tendons 6 sequentially penetrate through the support frame 12, the hollow jack 11, the tool anchor plate 16 and the inner sides of the tool clamping pieces 15 in the tensioning mechanism 1, when a hollow piston rod in the hollow jack 11 stretches relative to the oil cylinder barrel, the tool anchor plate 16 and the tool clamping pieces 15 are driven to move leftwards together, at the moment, the tool clamping pieces 15 clamp the prestressed tendons 6, tensioning of the prestressed tendons 6 is achieved, when the hollow piston rod in the hollow jack 11 stretches, the ejector blocks 18 bear against the ribs 17, the tool anchor plate 16 can withdraw from the hollow piston rod, the ejector blocks 18 rotate relative to the hollow jack 11 through hinges, and the ejector blocks 18 can rotate to one side, so that stretching of the hollow piston rod is not disturbed.
The working principle of the utility model is as follows: firstly, binding reinforcing steel bars and a formwork before casting and forming a box culvert 7, placing a corrugated pipe 5 and an anchoring mechanism 3 at corresponding positions when binding the reinforcing steel bars, casting concrete to enable the corrugated pipe 5 and the anchoring mechanism 3 to be wrapped in the concrete, removing the formwork after the concrete is cured to a set strength to form the box culvert 7, penetrating a prestressed reinforcement 6 into the corrugated pipe 5 from the right end of the box culvert 7, penetrating out from the left end of the anchoring mechanism 3, and anchoring the right end of the prestressed reinforcement 6 on the box culvert 7 by using an anchor device to keep the prestressed reinforcement stationary;
then, the left end of the prestressed tendon 6 sequentially passes through the inside of the guide mechanism 2 and the tensioning mechanism 1, the guide mechanism 2 and the tensioning mechanism 1 are fixedly installed together, and the left end of the prestressed tendon 6 is anchored with the tool anchor plate 16 by the tool clamping piece 15;
then, the hollow jack 11 is started, a hollow piston rod in the hollow jack 11 stretches leftwards to drive the tool anchor plate 16 and the tool clamping piece 15 to move leftwards together, at the moment, the tool clamping piece 15 clamps the prestressed tendon 6 to drive the left end of the prestressed tendon 6 to stretch leftwards, the prestressed tendon 6 is stretched, meanwhile, the stretching force is recorded through the tension sensor 13, and when the stretching force reaches the design strength, the stretching of the prestressed tendon 6 is completed;
then, the hollow piston rod in the hollow jack 11 is retracted rightward, and after the opening groove 14 reaches the top block 18, the top block 18 pushes the rib 17, so that the tool anchor plate 16 automatically withdraws from the hollow piston rod; at this time, the tendon 6 is slightly retracted, and after the work clamping piece 36 firmly anchors the tendon 6 to the work anchor plate 35, the tensioning mechanism 1 and the guiding mechanism 2 can be removed, and the redundant part at the left end of the tendon 6 is cut off by a cutting machine;
then, the external cement mortar pumping pipe is connected with the grouting pipe 37, cement mortar is pumped into the horn pipe 33 through the grouting pipe 37 and the grouting hole 32 in sequence, the cement mortar enters the corrugated pipe 5 again to wrap the prestressed tendons 6, the prestressed tendons 6 are prevented from being oxidized to rust, and gas escapes from the exhaust hole 34; after the cement mortar is coagulated, the prestressed tendons 6 and the box culvert 7 form a whole,
the box culvert 7 can effectively prevent cracks from occurring due to the tension in the box culvert 7 in the jacking process of the underpass railway.
The foregoing description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (6)
1. The utility model provides a lower-penetrating railway jacking box culvert crack control device, includes bellows (5) that are located box culvert (7) inside, its characterized in that, anchor mechanism (3) have been cup jointed to the one end of bellows (5), spiral muscle (4) have been cup jointed in the outside of anchor mechanism (3), and install guiding mechanism (2) in the one end of anchor mechanism (3), tensioning mechanism (1) are installed to one end of guiding mechanism (2), bellows (5), anchor mechanism (3), guiding mechanism (2) and tensioning mechanism (1) inside run through jointly and are provided with a plurality of prestressing tendons (6); guide mechanism (2) are including limiting plate (21) and with limiting plate (21) corresponding deflector (22), central point between limiting plate (21) and deflector (22) puts and is provided with a plurality of stand pipe (26), and is located outside fixed mounting of stand pipe (26) between limiting plate (21) and deflector (22) and have a plurality of split bolt (23), go up through hole (25) and lower through hole (24) have been seted up respectively to the upper and lower end of the inboard of limiting plate (21).
2. The underpass railway jacking box culvert crack control device according to claim 1, characterized in that the tensioning mechanism (1) comprises a hollow jack (11), the hollow jack (11) comprises an oil cylinder barrel and a hollow piston rod, a tension sensor (13) is mounted on the outer sides of the oil cylinder barrel and the hollow piston rod together, the right end of the oil cylinder barrel is fixedly connected with a supporting frame (12) through bolts, a group of jacking blocks (18) are rotatably connected on the outer side of the left end of the oil cylinder barrel through hinges, a group of open slots (14) corresponding to the jacking blocks (18) are formed in the outer side of the left end of the hollow piston rod, a tool anchor plate (16) is embedded in the inner side of the hollow piston rod from the left end, a tool clamping piece (15) is embedded in the inner side of the tool anchor plate (16), and a group of ribs (17) corresponding to the open slots (14) are fixedly connected on the outer side of the tool anchor plate (16).
3. The device for controlling the crack of the box culvert jacking through the underpass railway according to claim 2, wherein the right end of the supporting frame (12) is positioned at the left end of the guide plate (22), and the supporting frame (12) is fixedly connected with the guide plate (22) through the split bolt (23).
4. The underpass railway jacking box culvert crack control device according to claim 1, wherein the anchoring mechanism (3) comprises an anchor pad (31) and a working anchor plate (35) embedded in the anchor pad (31) from the left end, the right end of the anchor pad (31) is fixedly connected with a horn pipe (33), a plurality of working clamping pieces (36) are embedded in the inner side of the working anchor plate (35) from the left end, an exhaust hole (34) and a grouting hole (32) are respectively formed in the upper end and the lower end of the inner side of the anchor pad (31) in water, and a grouting pipe (37) is connected to the left end of the grouting hole (32) in a meshed mode.
5. The device for controlling the crack of the box culvert jacking through a lower passing railway according to claim 4, wherein the exhaust hole (34) and the grouting hole (32) are communicated with a horn pipe (33), the grouting pipe (37) penetrates through the inner side of the lower penetrating hole (24), and the grouting hole (32) is communicated with the upper penetrating hole (25).
6. The device for controlling the crack of the box culvert jacking through the underpass railway according to claim 4, wherein the horn pipe (33) is positioned in the box culvert (7), the left end of the corrugated pipe (5) is embedded in the right side of the horn pipe (33), the anchor backing plate (31) is positioned in the right end of the box culvert (7), and the spiral rib (4) is sleeved on the outer side of the horn pipe (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320901059.2U CN220057674U (en) | 2023-04-20 | 2023-04-20 | Crack control device for jacking box culvert of underpass railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320901059.2U CN220057674U (en) | 2023-04-20 | 2023-04-20 | Crack control device for jacking box culvert of underpass railway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220057674U true CN220057674U (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320901059.2U Active CN220057674U (en) | 2023-04-20 | 2023-04-20 | Crack control device for jacking box culvert of underpass railway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220057674U (en) |
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2023
- 2023-04-20 CN CN202320901059.2U patent/CN220057674U/en active Active
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