CN217323073U - Supporting structure for station variable-span gantry track - Google Patents
Supporting structure for station variable-span gantry track Download PDFInfo
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- CN217323073U CN217323073U CN202220593324.0U CN202220593324U CN217323073U CN 217323073 U CN217323073 U CN 217323073U CN 202220593324 U CN202220593324 U CN 202220593324U CN 217323073 U CN217323073 U CN 217323073U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 70
- 239000010959 steel Substances 0.000 claims abstract description 70
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000010276 construction Methods 0.000 abstract description 22
- 238000013461 design Methods 0.000 description 13
- 239000004567 concrete Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of subway construction, and discloses a supporting structure for a station variable-span gantry track, which comprises a Bailey beam support and a plurality of triangular support type steel frames, wherein the triangular support type steel frames are arranged in a foundation pit side by side at intervals, and the Bailey beam support is erected on the triangular support type steel frames along the length direction of the foundation pit; the triangular support steel frame comprises a vertical section, a horizontal section and an inclined section which are sequentially connected, the vertical section and the pre-buried steel plate on the crown beam are welded and fixed, and a support frame is arranged inside the triangular support steel frame; the utility model provides a pair of be used for station to become to stride longmen orbital bearing structure has effectively solved the station and has become to stride longmen track support problem, and does not influence subway station structure construction.
Description
Technical Field
The utility model relates to a subway construction technical field, concretely relates to be used for station to become to stride orbital bearing structure in longmen.
Background
Subway construction is often located urban area, and the existing building is close to, and the on-site pavement is narrow and small, does not possess and uses crane and tower crane condition, and the hoist and mount operation only adopts the portal crane. However, the positions of a track panel well and a shield well of a subway station are different from the width of a standard section, and the problem of span change of a gantry track is faced in gantry crane track installation.
The long-span variable-span gantry track beam is usually installed by adopting the modes of lower latticed columns, steel box beams, lower latticed columns, Bailey beams and the like to reduce the longitudinal width of the gantry track beam, increase stress points and ensure that the structural deformation is within an allowable range. However, by adopting the method, the lattice column cannot be dismantled in the construction process of the subway station structure, the later-stage dismantling cost is high, the pile foundation penetrates through the positions of the station bottom plate, the middle plate and the top plate, the structural waterproof construction quality is poor, and the later-stage water seepage risk is high.
Portal crane vertical transport is important component part in station foundation ditch excavation and major structure construction, and in subway station work progress, portal crane need erect the completion before the foundation ditch excavation. However, when a station structure encounters a locally widened region of a foundation pit such as a shield launching and receiving well, a track panel well and the like, the gantry crane faces the difficult problem of suspended installation. The width of a foundation pit of a standard section of the big same station is 20.9m, the width of a foundation pit of a rail panel well area is widened to 23.6m, and the suspended span of a rail beam of the portal crane is 33.4 m. If the single box girder or reinforced concrete girder longitudinal-span rail well arrangement construction is adopted, the deformation of the rail girder is large, and the operation requirement of the gantry crane is not met; if the structural form of the bailey truss and the upright post piles is adopted, although the problem of large deflection deformation of the gantry crane track beam can be effectively solved by additionally arranging the upright post piles, the upright post piles are in serious conflict with structural construction, and quality problems such as water leakage, local cracks and the like of the structural slab in the upright post pile area are easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be used for station to become to stride orbital bearing structure in longmen for solve at least one above-mentioned problem that exists among the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a supporting structure for a station variable-span gantry track comprises a Bailey beam support and a plurality of triangular support type steel frames, wherein the triangular support type steel frames are arranged in a foundation pit side by side at intervals, and the Bailey beam support is erected on the triangular support type steel frames along the length direction of the foundation pit; the triangular support type steel frame comprises a vertical section, a horizontal section and an inclined section which are connected in sequence, the vertical section and the crown beam are welded and fixed through pre-buried steel plates, and a support frame is arranged inside the triangular support type steel frame.
This technical scheme can effectively reduce the influence of gantry crane track roof beam construction to follow-up major structure, improves track roof beam overall stability simultaneously, guarantees the normal use of gantry crane in the section well area of track panel. This technical scheme compares in the track beam structure form of traditional bailey frame + stand pile, and the track beam erection time period can be shortened by a wide margin in the design of triangular supports type steelframe and bailey beam supporting structure, reduces portal crane track beam construction cost. The gantry track supporting structure at the station span-changing position has no influence on the construction of the main structure by adopting the design of combining the triangular support type steel frame and the Bailey beam support, ensures the construction continuity of the main structure and effectively ensures the integral waterproof effect of the station. The design that triangular support type steelframe and bailey roof beam support combine has simple structure, the transportation is convenient, erect characteristics such as quick, the decomposition is easy, and the requirement is established to the gantry crane track beam that the different spans is satisfied in accessible regulation type steelframe interval and bailey frame quantity.
Set up novel triangular supports type steelframe through bei lei beam support down, reduce longmen track bei lei beam support span, improve track overall stability, reduce the track deflection, ensure that gantry crane becomes regional safe, the reliable operation in the station.
Furthermore, in order to adapt to the erection of the track beams of the portal cranes with different spans, the distance between the adjacent triangular support type steel frames is 3-5 m.
Furthermore, in order to improve the structural strength of the supporting framework, the vertical section, the horizontal section and the inclined section are formed by sequentially welding 200H-shaped steel to form the supporting framework.
Furthermore, the I20I-steel is adopted as the support frame, the support frame and the support frame form a truss stress system, and the compression resistance and the tensile resistance of the triangular support type steel frame are effectively improved.
Furthermore, the Bailey beam support comprises a cross-section beam, the cross-section beam is formed by assembling a plurality of Bailey frames, the height of each Bailey frame is 1.5m, and the length of each Bailey frame is 3 m.
Further, in order to promote the structural stability of the Bailey beam support, the Bailey beam support comprises an upper reinforcing chord and a lower reinforcing chord which are respectively arranged at the upper end and the lower end of the cross section cross beam.
Furthermore, in order to conveniently realize the laying of the steel rails, a plurality of I-shaped steels are transversely laid on the upper reinforcing chord, the interval between every two adjacent I-shaped steels is 20-40 cm, and the steel rails are laid on the I-shaped steels.
Furthermore, eight triangular support type steel frames are arranged in the foundation pit.
Further, the length of the vertical section is 1.35m, and the length of the horizontal section is 2.15 m.
The utility model has the advantages that:
this technical scheme can effectively reduce the influence of gantry crane track roof beam construction to follow-up major structure, improves track roof beam overall stability simultaneously, guarantees the normal use of gantry crane in the section well area of track panel. This technical scheme compares in the track beam structure form of traditional bailey frame + stand pile, and the track beam erection time period can be shortened by a wide margin in the design of triangular supports type steelframe and bailey beam supporting structure, reduces portal crane track beam construction cost. The gantry track supporting structure at the station span-changing position has no influence on the construction of the main structure by adopting the design of combining the triangular support type steel frame and the Bailey beam support, ensures the construction continuity of the main structure and effectively ensures the integral waterproof effect of the station. The design that triangular support type steelframe and bailey beam support combine has simple structure, transportation convenience, erects characteristics such as quick, the decomposition is easy, and the accessible is adjusted triangular support type steelframe interval and bailey frame quantity, can satisfy the gantry crane track beam erection requirement of different spans.
Set up novel triangular supports type steelframe through bei lei beam support down, reduce longmen track bei lei beam support span, improve track overall stability, reduce the track deflection, ensure that gantry crane becomes regional safe, the reliable operation in the station.
Simultaneously for traditional beiLei roof beam + column stake support system, this design adopts triangular supports type steelframe still to have cost low, but reuse, advantages such as easy dismounting.
Drawings
FIG. 1 is a schematic view of the overhead structure of the middle triangular support steel frame installed in the foundation pit;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic structural view of a middle triangular support type steel frame according to the present invention;
fig. 4 is a perspective view of the middle triangular support type steel frame of the present invention.
In the figure: a Bailey beam support 1; a cross-section beam 1.1; an upper reinforcing chord 1.2; a lower reinforcing chord 1.3; a triangular support type steel frame 2; a vertical section 2.1; a horizontal segment 2.2; an inclined section 2.3; a foundation pit 3; a crown beam 4; pre-burying a steel plate 5; a support frame 6; and 7. I-shaped steel.
Detailed Description
Example 1:
as shown in fig. 1 to 4, the present embodiment provides a supporting structure for a station variable-span gantry track, which includes a bailey beam support 1 and a plurality of triangular support type steel frames 2, the plurality of triangular support type steel frames 2 are arranged in a foundation pit 3 side by side at intervals, the bailey beam support 1 is erected on the plurality of triangular support type steel frames 2 along the length direction of the foundation pit 3, and specifically, in order to meet the basic steel rail arrangement requirement, eight triangular support type steel frames 2 may be arranged in the foundation pit 3; triangular supports type steelframe 2 is including the vertical section 2.1, horizontal segment 2.2 and the slope section 2.3 that connect gradually, and vertical section 2.1 and pre-buried steel sheet 5 welded fastening on the hat roof beam 4, triangular supports type steelframe 2 inside is equipped with support frame 6. Specifically, the vertical section 2.1 has a length of 1.35m, and the horizontal section 2.2 has a length of 2.15 m.
This technical scheme can effectively reduce the influence of gantry crane track roof beam construction to follow-up major structure, improves track roof beam overall stability simultaneously, guarantees the normal use of gantry crane in the section well area of track panel. This technical scheme compares in the track beam structure form of traditional bailey frame + stand pile, and the design of triangular supports type steelframe 2 and 1 structure of bailey beam support can shorten track beam erection time limit by a wide margin, reduces portal crane track beam construction cost. The gantry track supporting structure at the station span-changing position has no influence on the construction of the main structure by adopting the design of combining the triangular support type steel frame 2 and the Bailey beam support 1, so that the construction continuity of the main structure is ensured, and the integral waterproof effect of the station is effectively ensured. The design that triangular support type steelframe 2 and bailey beam support 1 combined has simple structure, transportation convenience, erects characteristics such as quick, that decompose easily, and the accessible is adjusted 2 intervals of triangular support type steelframe and bailey frame quantity, can satisfy the gantry crane track beam erection requirement of different spans.
Set up novel triangular supports type steelframe 2 under bailey beam support 1, reduce 1 span of bailey beam support of gantry rail, improve track overall stability, reduce the track deflection, ensure that gantry crane becomes regional safe, the reliable operation of striding at the station.
Example 2:
this embodiment is optimized based on embodiment 1 described above.
In order to adapt to the erection of the rail beams of the portal cranes with different spans, the distance between the adjacent triangular support type steel frames 2 is 3-5 m, and in a specific application, the distance can be 4 m.
Example 3:
this embodiment is optimized based on embodiment 2 described above.
In order to improve the structural strength of the supporting framework, the vertical section 2.1, the horizontal section 2.2 and the inclined section 2.3 are welded in turn by 200H-shaped steel to form the supporting framework.
Example 4:
this example was optimized based on example 1 described above.
The supporting frame 6 is made of I-shaped steel 7, specifically I20I-shaped steel, the supporting framework and the supporting frame 6 form a truss stress system, and the compression resistance and the tensile resistance of the triangular supporting type steel frame 2 are effectively improved.
Example 5:
this embodiment is optimized based on embodiment 1 described above.
The Bailey beam support 1 comprises a cross-section beam 1.1, the cross-section beam 1.1 is formed by assembling a plurality of Bailey frames, the height of each Bailey frame is 1.5m, and the length of each Bailey frame is 3 m.
Example 6:
this embodiment is optimized based on embodiment 5 described above.
In order to improve the structural stability of the bailey beam support 1, the bailey beam support 1 includes an upper reinforcing chord 1.2 and a lower reinforcing chord 1.3 respectively disposed at the upper and lower ends of the cross-section beam 1.1.
Example 7:
this embodiment is optimized based on embodiment 6 described above.
In order to conveniently realize the laying of the steel rails, a plurality of I-shaped steels 7 are transversely laid on the upper reinforcing chord 1.2, the interval between every two adjacent I-shaped steels 7 is 20-40 cm, the steel rails are laid on the I-shaped steels 7, and in a specific embodiment, the interval between the I-shaped steels can be 30 cm.
It should be noted that:
(1) when the gantry crane is used, the deformation of the span-middle position of the Bailey beam support 1 is the largest, the space between the triangular support type steel frames 2 at the span-middle position of the Bailey beam support 1 can be considered to be reduced during design, and meanwhile, the triangular support type steel frames 2 are provided with the connecting beams, so that the stability of the gantry crane is ensured.
(2) The Bailey beam support 1 is in pin joint, inelastic deformation exists, and a preloading test should be performed in advance before the Bailey beam support 1 is installed, so that the design elevation of the Bailey beam support 1 can be adjusted, and the design elevation of the rail in the gantry use state can meet the standard requirement.
(3) The triangular support type steel frame 2 and the Bailey beam support 1 correspond to the welding line before and after use to detect flaws, so that firm welding is guaranteed, and meanwhile, the weld joint needs to be checked in the using process.
(4) For the use of a large-span, heavy-load and large-tonnage gantry, the proposal is to increase lattice columns locally or reduce the distance between triangular support type steel frames 2 and increase the rigidity of a bracket so as to improve the safety factor of the gantry in use.
When the traditional Bailey beam and upright post supporting system is adopted for gantry rail support at a station variable span, 4 reinforced concrete upright posts with the diameter of 1.2m need to be arranged, the length of a single upright post is 25.5m, the cost of personnel, materials, mechanical equipment and the like is comprehensively considered, the cost of the single upright post is 6.8 ten thousand yuan, and the concrete removal rate is 260 yuan/m 3 And the in-station manual concrete construction slag is transferred by 550 yuan/m 3 And considering the cost for repairing later-stage main structure finished concrete and eliminating leakage points, the cost of the traditional Bailey beam and upright post pile supporting system is about 58.8 ten thousand yuan. When the triangular support type steel frame 2 and the Bailey beam support structure are adopted, the cost of personnel, materials, processing and the like is comprehensively considered, 1115 yuan/piece of steel plate is embedded in the side face of the crown beam, 4150 yuan/piece of the triangular support frame is embedded in the side face of the crown beam, and the total cost of the triangular support type steel frame 2 and the Bailey beam support structure is 4.2 ten thousand yuan. Therefore, when the station variable-span gantry track support adopts the triangular support type steel frame 2 and the Bailey beam support structure, the cost can be effectively reduced, the cost is reduced by about 54 ten thousand yuan compared with the traditional Bailey beam and upright post support system, and meanwhile, the triangular support type steel frame 2 also has the advantages of being reusable, convenient to disassemble and assemble and the like.
Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a bearing structure that is used for station to become to stride gantry rail which characterized in that: the Bailey beam support is erected on the triangular support type steel frames along the length direction of the foundation pit; the triangular support type steel frame comprises a vertical section, a horizontal section and an inclined section which are connected in sequence, the vertical section and the crown beam are welded and fixed through pre-buried steel plates, and a support frame is arranged inside the triangular support type steel frame.
2. The supporting structure for a station variable-span gantry track according to claim 1, characterized in that: the distance between the adjacent triangular support type steel frames is 3-5 m.
3. The supporting structure for the station variable-span gantry track according to claim 2, characterized in that: the vertical section, the horizontal section and the inclined section are welded in turn by 200H-shaped steel to form a supporting framework.
4. The supporting structure for a station variable-span gantry track according to claim 1, characterized in that: the support frame is made of I-shaped steel.
5. The supporting structure for a station variable-span gantry track according to claim 1, characterized in that: the Bailey beam support comprises a cross-section cross beam, the cross-section cross beam is formed by splicing a plurality of Bailey frames, the height of a single Bailey frame is 1.5m, and the length of the single Bailey frame is 3 m.
6. The support structure for the station variable-span gantry track according to claim 5, characterized in that: the Bailey beam support comprises an upper reinforcing chord and a lower reinforcing chord which are respectively arranged at the upper end and the lower end of the cross section cross beam.
7. The support structure for the station variable-span gantry track according to claim 6, characterized in that: a plurality of I-shaped steels are transversely paved on the upper reinforcing chord, the interval between every two adjacent I-shaped steels is 20-40 cm, and steel rails are paved on the I-shaped steels.
8. The supporting structure for a station variable-span gantry track according to claim 1, characterized in that: eight triangular support type steel frames are arranged in the foundation pit.
9. The supporting structure for a station variable-span gantry track according to claim 1, characterized in that: the length of the vertical section is 1.35m, and the length of the horizontal section is 2.15 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220593324.0U CN217323073U (en) | 2022-03-17 | 2022-03-17 | Supporting structure for station variable-span gantry track |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220593324.0U CN217323073U (en) | 2022-03-17 | 2022-03-17 | Supporting structure for station variable-span gantry track |
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| Publication Number | Publication Date |
|---|---|
| CN217323073U true CN217323073U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220593324.0U Expired - Fee Related CN217323073U (en) | 2022-03-17 | 2022-03-17 | Supporting structure for station variable-span gantry track |
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| Country | Link |
|---|---|
| CN (1) | CN217323073U (en) |
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- 2022-03-17 CN CN202220593324.0U patent/CN217323073U/en not_active Expired - Fee Related
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Granted publication date: 20220830 |