CN212561491U - Trans-tunnel steel reinforced concrete cast-in-place pile conversion beam structure - Google Patents
Trans-tunnel steel reinforced concrete cast-in-place pile conversion beam structure Download PDFInfo
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- CN212561491U CN212561491U CN202020879086.0U CN202020879086U CN212561491U CN 212561491 U CN212561491 U CN 212561491U CN 202020879086 U CN202020879086 U CN 202020879086U CN 212561491 U CN212561491 U CN 212561491U
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Abstract
The utility model relates to a cross-tunnel steel reinforced concrete cast-in-place pile conversion beam structure, which comprises a beam and a pile, wherein the beam and the pile are internally provided with profile steel, and the profile steel in the beam is rigidly connected with the profile steel in the pile in a node area; after the section steel in the pile is in place and fixed, the section steel is placed on an embedded steel plate on the outer side through a channel steel welded on a top steel plate of the section steel, and the channel steel is fully welded and fixed with the embedded steel plate in the cushion layer; and the flange of the section steel in the pile is welded and fixed with the upper opening and the lower opening of the steel casing of the pile by adopting a square steel support. The utility model discloses utilize shaped steel as the structure skeleton, can reduce the cross sectional dimension of stake, roof beam, increase substantially and stride across ability and bearing capacity, have the advantage of steel construction and concrete structure, rigidity is big and anti-seismic performance is strong, makes on whole loads of building can effectively change the natural foundation that transmits the tunnel both sides, has higher structural safety performance.
Description
Technical Field
The utility model relates to a building (structure) that often exists under the building foundation and being used, especially a steel concrete bored concrete pile conversion beam structure.
Background
In a mountainous area urban engineering construction site, there are often in-use buildings (structures) such as tunnels and the like under the building foundation. The construction technology needs to be scientific and reasonable to solve so as to ensure the safety of the existing building structure under the foundation during construction and ensure the smooth implementation of the construction of the new building.
The underpinning structure system comprising the section steel concrete conversion beam and the pile is adopted for spanning, the load of a newly built building (structure) is completely transmitted to the section steel concrete pile outside the tunnel through the underpinning foundation beam and then transmitted to a natural foundation, and therefore the normal use function of the tunnel is not influenced and the structural safety of the new building is guaranteed.
Disclosure of Invention
The utility model aims to provide a cross tunnel shaped steel concrete bored concrete pile conversion beam structure, this structure can reduce the cross sectional dimension of stake, roof beam, increases substantially and stridees across ability and bearing capacity, has the advantage of steel construction and concrete structure, and rigidity is big and anti-seismic performance is strong.
In order to achieve the above object, the utility model adopts the following technical scheme: a cross-tunnel steel reinforced concrete cast-in-place pile conversion beam structure comprises a beam and a pile, wherein the beam and the pile are internally provided with profile steel, and the profile steel in the beam is rigidly connected with the profile steel in the pile in a node area; after the section steel in the pile is in place and fixed, the section steel is placed on an embedded steel plate on the outer side through a channel steel welded on a top steel plate of the section steel, and the channel steel and the embedded steel plate are fully welded and fixed; and the flange of the section steel in the pile is welded and fixed with the upper opening and the lower opening of the steel casing of the pile by adopting a square steel support.
Furthermore, the steel bars at the lower part of the beam are welded and fixed with the section steel in the pile through the straight thread sleeves.
Furthermore, the beam is provided with a conversion ground beam reinforcing steel bar, and the conversion ground beam reinforcing steel bar is welded and fixed with the section steel flange upper sleeve in the beam.
Furthermore, the steel bars at the lower part of the beam are connected with the flange of the section steel in the pile in a fixed length mode.
Furthermore, studs are distributed on the flange of the section steel in the beam and the flange of the outer side of the section steel in the beam.
The utility model has the advantages that:
the utility model discloses utilize shaped steel as structural framework, can reduce the cross sectional dimension of stake, roof beam, increase substantially and stride across ability and bearing capacity, have the advantage of steel construction and concrete structure, rigidity is big and anti-seismic performance is strong, on making the whole loads of building effectively convert the natural foundation on transmitting the tunnel both sides, have higher structural safety performance, can be used to stride across the existing underground building to new building among the mountain area city construction, have obvious economic benefits and social.
Drawings
FIG. 1 is a schematic illustration of positioning and fixing of cast-in-place steel in a cast-in-place pile in a cross-tunnel steel reinforced concrete cast-in-place pile transfer beam structure;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic view of the connection structure of the reinforcing steel bars at the lower part of the beam and the section steel in the pile;
FIG. 5 is a schematic view of a rigid connection structure of a section steel column and a section steel beam in a cross-tunnel section steel concrete cast-in-place pile conversion beam structure.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
As shown in fig. 1 to 3, a cross-tunnel steel reinforced concrete cast-in-place pile transfer beam structure comprises a beam, a pile, section steel 1, a top steel plate 4, channel steel 2, an embedded steel plate 5, a square steel support 3, a steel pile casing 6 and the like.
As shown in fig. 4, the steel bars at the lower part of the beam are welded and fixed with the section steel 1 in the pile through the straight thread sleeve 7. The roof beam has conversion ground beam reinforcing bar 8, and conversion ground beam reinforcing bar 8 is fixed with 1 edge of a wing upper sleeve welded of shaped steel in the roof beam.
As shown in fig. 5, the reinforcing bars 12 at the lower part of the beam 11 are connected to the flanges of the section steel 1 in the pile 10 to a fixed length. Studs 9 are distributed on the flange of the section steel 1 in the beam 10 and the flange of the outer side of the section steel 1 in the beam 11.
The specific implementation requirements are as follows:
1) the structural steel is arranged in the beam and the pile, and the verticality of the structural steel in the pile and the elevation position of the structural steel in the beam need to meet the design and specification requirements except for meeting the construction specification requirements of the traditional beam and pile.
2) The beam internal section steel and the pile internal section steel are rigidly connected in a node area, and are influenced by the beam and the pile internal reinforcing steel, so that the construction working surface is limited, and the connecting operation difficulty is high.
3) When the reinforcing steel bars at the lower part of the beam are connected with the flange of the steel of the inner section of the pile, the connecting materials have different rigidity and cannot stretch out and draw back after effective connection, and a new sizing connecting technology is needed.
4) For the connection of the reinforcing steel bars at the lower part of the beam and the section steel in the pile, after the reinforcing steel bars are connected with the straight thread sleeves, the whole section of reinforcing steel bars are pushed to a preset position and are welded and fixed by adopting measures so as to prevent natural sagging, the reinforcing steel bars with small spacing between the reinforcing steel bars are pushed from the middle to two sides, and compared with common welding, the technical difficulty of welding operation is difficult and the welding quality is ensured is increased.
The utility model discloses a construction main points:
1) secondary hole forming of cast-in-place pile and steel section fixing in place (taking pile diameter phi 1500mm as an example)
And (5) positioning and fixing the section steel in the cast-in-place pile. And after secondary pore-forming is finished, the H-shaped steel is transferred into the pile hole, then 16 b-shaped (160mmx65mmx8.5mm) channel steel welded on the steel plate on the top of the section steel column is placed on the embedded steel plate on the outer side, accurate positioning is carried out according to the pile bit line sprung on the cushion layer, and the channel steel and the embedded steel plate in the cushion layer are welded firmly after positioning.
The flange of the H-shaped steel in the pile is firmly welded with the upper opening and the lower opening of the steel casing by adopting a square steel support with the thickness of 80mmx60mmx4mm, and the concrete method comprises the following steps: after the correction and reinforcement of the top of the H-shaped steel is completed, a professional electric welding technician is dispatched to the bottom of the H-shaped steel by using a rope ladder, 4 directions of rectangular steel pipes of 80mmx60mmx40mm are used for firmly supporting soil bodies and the H-shaped steel and firmly welding the soil bodies and the H-shaped steel, then the steel is ascended to the bottom of a steel pile casing, 4 directions of rectangular steel pipes of 80mmx60mmx40mm are used for firmly supporting the steel pile casing and the H-shaped steel and firmly welding the steel and the H-shaped steel, concrete pouring is carried out after the correction is in place, double-pipe simultaneous balanced pouring is adopted, the pile position ink lines on a cushion layer are used for detecting pull wires at any time during pouring, the position and the elevation are checked and corrected.
2) Fixed-length connection of straight thread sleeve and cast-in-place pile profile steel
For the connection problem of the steel bars at the lower part of the beam and the section steel in the pile, because the rigidity of the steel bars and the section steel materials is different, after the steel bars are connected with the straight thread sleeves, the steel bars with two ends connected with the straight thread sleeves are pushed to preset positions, the steel bars are welded and fixed by adopting a phi 8 measure, then the straight thread sleeves and the section steel are connected in a fixed length mode, and construction is carried out from the middle to two sides. After the steel bars are connected with the straight thread sleeves, the sleeves are connected with the section steel as shown in figure 4.
3) The connection detail of the steel column in the pile and the section steel conversion ground beam (steel beam) is shown in fig. 5, the flatness of the molten steel in the underpinned foundation beam is monitored, in order to ensure that the rigid connection of the inner section steel 1 of the reinforced concrete foundation beam 11 and the section steel 1 in the reinforced concrete cast-in-place pile 10 in a node area and the fixed-length connection between the steel bar at the lower part of the reinforced concrete foundation beam and the flange of the inner section steel of the reinforced concrete cast-in-place pile, the deviation of the position of the inner section steel of the foundation beam directly influences the quality of the connection node, and the flatness of the molten steel in the foundation beam needs to be monitored.
In order to avoid the influence of the load stress change of the main structure on the railway tunnel, the structure adopts a mode of profile steel rock-socketed pile (column) and profile steel conversion ground beam crossing to carry out foundation design. When the underpinning foundation beam-section steel concrete cast-in-place pile structure is constructed, the pile position displacement, the surface subsidence, the verticality of the section steel rock-socketed pile (column) and the flatness of the section steel conversion ground beam are effectively controlled within an allowable limit value range, the engineering percent of pass is 100%, and the crossing of the existing tunnel line is successfully realized.
The technical characteristics and effects of the utility model are that:
the utility model is suitable for a have original building (structure) under the new building ground, original building (structure) service function and structure safety must not receive any influence, and the whole loads of new building must stride across original building (structure) and construct the engineering that is converted into effective stress layer. Rigidly connecting the beam internal section steel and the pile internal section steel in a node area; the lower part of the beam is connected with the inner section steel flange of the pile in a fixed length mode; the whole construction process is monitored, and construction related parameters are adjusted in time according to working conditions, so that the main structure can safely and smoothly span the existing buildings (structures).
Claims (5)
1. The utility model provides a stride tunnel shaped steel concrete bored concrete pile conversion roof beam structure, includes roof beam, stake, its characterized in that: section steel is arranged in the beam and the pile, and the section steel in the beam is rigidly connected with the section steel in the pile in a node area; after the section steel in the pile is in place and fixed, the section steel is placed on an embedded steel plate on the outer side through a channel steel welded on a top steel plate of the section steel, and the channel steel and the embedded steel plate are fully welded and fixed; and the flange of the section steel in the pile is welded and fixed with the upper opening and the lower opening of the steel casing of the pile by adopting a square steel support.
2. The cross-tunnel steel reinforced concrete cast-in-place pile transfer beam structure of claim 1, wherein: and the steel bars at the lower part of the beam are welded and fixed with the section steel in the pile through the straight thread sleeves.
3. The cross-tunnel steel reinforced concrete cast-in-place pile transfer beam structure of claim 1, wherein: the beam is provided with a conversion ground beam reinforcing steel bar, and the conversion ground beam reinforcing steel bar is welded and fixed with the upper sleeve of the flange of the section steel in the beam.
4. The cross-tunnel steel reinforced concrete cast-in-place pile transfer beam structure of claim 1, wherein: and the steel bars at the lower part of the beam are connected with the flange of the section steel in the pile in a fixed length mode.
5. The cross-tunnel steel reinforced concrete cast-in-place pile transfer beam structure of claim 1, wherein: and studs are distributed on the flange of the section steel in the beam and the flange of the outer side of the section steel in the beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020879086.0U CN212561491U (en) | 2020-05-23 | 2020-05-23 | Trans-tunnel steel reinforced concrete cast-in-place pile conversion beam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020879086.0U CN212561491U (en) | 2020-05-23 | 2020-05-23 | Trans-tunnel steel reinforced concrete cast-in-place pile conversion beam structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212561491U true CN212561491U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020879086.0U Active CN212561491U (en) | 2020-05-23 | 2020-05-23 | Trans-tunnel steel reinforced concrete cast-in-place pile conversion beam structure |
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| Country | Link |
|---|---|
| CN (1) | CN212561491U (en) |
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- 2020-05-23 CN CN202020879086.0U patent/CN212561491U/en active Active
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