CN216920439U - Formwork support system for bottom side wall of top plate of cover excavation section of subway station - Google Patents
Formwork support system for bottom side wall of top plate of cover excavation section of subway station Download PDFInfo
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- CN216920439U CN216920439U CN202220736177.8U CN202220736177U CN216920439U CN 216920439 U CN216920439 U CN 216920439U CN 202220736177 U CN202220736177 U CN 202220736177U CN 216920439 U CN216920439 U CN 216920439U
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Abstract
The utility model discloses a formwork support system for a bottom side wall of a top plate of a cover excavation section of a subway station. The right-angled part of the lower end of the triangular support is fixed by adopting foundation bolts and double-spliced channel steel pads, and the oblique-angled part of the lower end is fixed by adopting steel pipe inclined struts and reinforcing steel bar ground anchors, so that the triangular support can effectively resist the lateral pressure of concrete pouring; pasting foam double faced adhesive tape at the gap between the wood template and the upturned side wall to fill the gap between the wood template and the upturned side wall, and reserving a grouting hole above the template to arrange a horn mouth template; thereby effectively improving the integrity of the formwork support system and ensuring the forming quality of the concrete. Due to the adoption of the pouring method of the post-pouring belt, the utility model can also adopt two spliced templates for combination, so that the roughening treatment is more convenient and quicker when the bottom of the top plate is already formed and the top of the side wall is poured firstly.
Description
Technical Field
The utility model relates to the technical field of subway station cover excavation, in particular to a formwork support system for a reverse-construction top plate lower side wall of a subway station cover excavation section.
Background
With the continuous development of large cities and the continuous influx of foreign people, the increasing traffic pressure makes urban rail transit thrive. In order to improve the utilization rate and convenience of stations, urban rail transit needs to cross core sections and densely populated areas, and the difficulty of pipeline migration and traffic guidance and modification is increasing day by day. Compare in open cut in the same direction as doing, the lid is dug half contrary and is done and can effectively utilize the construction site for move the speed of transformation, improve the efficiency of construction. However, the clearance of the sinking section of the top plate in the reverse construction is small, the construction machinery and equipment are not easy to expand, and the safety, the reliability and the guarantee are not easy. In the traditional method, a formwork support system of a wooden formwork and a scaffold is adopted, so that the construction cost and time are increased, and the forming quality of the concrete of the negative layer side wall is difficult to ensure. Therefore, a novel template system for the bottom side wall of the top plate of the cover excavation section of the subway station is needed at present to solve the problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a formwork support system for reversely making the lower side wall of a top plate at a cover and excavation section of a subway station, which ensures the forming quality and integrity of side wall concrete by adopting a formwork support system of a wooden template and a triangular support, optimizes the concrete pouring sequence by adopting reserved bell mouth grouting holes and arranged post-pouring belts, and ensures the integrity of the interface of the reversely made top plate and the side wall so as to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme:
a formwork support system for a reverse construction of a lower side wall of a top plate of a cover excavation section of a subway station comprises a wooden gluing panel, foundation bolts, triangular supports, grouting holes and inclined strut steel pipes, wherein a plurality of vertical back ridges are arranged on the rear side of the wooden gluing panel, the triangular supports are arranged side by side, a plurality of double-spliced channel steels are arranged on one sides, close to the back ridges, of the triangular supports at intervals from top to bottom, and the double-spliced channel steels are fixed on the triangular supports; a channel steel pad is arranged below the triangular support and is formed by splicing two channel steels with a gap between the two channel steels; the foundation bolts are inserted into the gaps of the channel steel pads, and the upper ends of the foundation bolts are connected with the channel steel pads together by screwing nuts; the bottom of A-frame is kept away from the one end of side wall and is equipped with the bracing steel pipe, and the end of bracing steel pipe is equipped with flexible silk head, and flexible silk head department is connected with the reinforcing bar earth anchor, and the reinforcing bar earth anchor is pre-buried in having executed the medium plate.
Further: the width of the gap in the middle of the steel groove pad is larger than the diameter of the foundation bolt.
And further: and the lower part of the wooden glued panel is provided with foam double-sided adhesive.
Further: the upper portion of wooden veneer panel is equipped with a plurality of injected holes, and the injected hole is the horn shape and sets up.
And further: the top of A-frame is equipped with a plurality of bracing pieces, and the bracing piece is located the outside of injected hole, A-frame's upper portion threaded connection has first puller bolt, is equipped with the lip block between first puller bolt and the wooden veneer panel.
Further: the top of wooden veneer panel is equipped with the back and pours and take the template, the upper portion of back pouring area template is equipped with a plurality of injected holes, and the injected hole is the horn shape setting.
Further: the bottom of the rear pouring belt template is provided with a bottom reinforcing rod, and the bottom of the bottom reinforcing rod is flush with the bottom of the rear pouring belt template; the top of the post-pouring belt formwork is provided with a top reinforcing rod, and a plurality of auxiliary reinforcing rods are arranged between the top reinforcing rod and the bottom reinforcing rod.
Further: a first reinforcing connecting rod and a second reinforcing connecting rod are arranged at the upper part between two adjacent triangular supports, and the first reinforcing connecting rod and the second reinforcing connecting rod are not arranged between the triangles where the grouting holes are located; and a second tightening bolt and a third tightening bolt are respectively arranged on the first reinforcing connecting rod and the second reinforcing connecting rod.
Further: and the tail end of the second puller bolt is provided with an inverted L-shaped pressing plate, and the inverted L-shaped pressing plate is contacted with the top reinforcing rod.
Further: and a foam double-faced adhesive tape is arranged between the wooden glued panel and the rear pouring belt template.
Compared with the prior art, in the use process, the formwork system of the wood veneer panel, the square wood and the double-spliced channel steel and the triangular support supporting system formed by welding the channel steel are combined with the reinforcing and supporting functions of the foundation bolts and the steel pipe diagonal braces, and the close adhesion and compaction functions of the foam double faced adhesive tape on the formwork and the side wall bottom feet are utilized, so that the integrity of the formwork system can be effectively improved, and the forming quality of concrete is ensured.
The utility model can also adopt two spliced templates for combination, so that the chiseling treatment is more convenient and faster when the bottom of the top plate and the top of the side wall which is poured firstly are subjected to chiseling treatment.
Drawings
Fig. 1 is a schematic cross-sectional structure view of a formwork support system of a bottom wall of a top plate of a cover and excavation section of a subway station.
Fig. 2 is an enlarged schematic view of a in fig. 1.
FIG. 3 is a schematic diagram of a longitudinal section of a side wall support framework system under a reverse top plate according to the present invention.
Fig. 4 is a schematic sectional view showing a pouring hole of a post-cast side wall according to the present invention.
Fig. 5 is a schematic view of the building structure of fig. 4.
Fig. 6 is a schematic structural diagram of the installation position of the formwork system of the present invention.
Fig. 7 is a partial perspective view of the formwork system of the present invention.
Fig. 8 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 9 is an enlarged structural diagram of B in fig. 8.
In the figure: 1. a wood veneer panel; 2. back corrugation; 3. double-spliced channel steel; 4. a triangular bracket; 5. anchor bolts; 6. a channel steel pad; 7. bracing the steel pipe; 8. a steel bar ground anchor; 9. grouting holes; 10. a support bar; 11. a first puller bolt; 12. supporting the cushion block; 13. then pouring a belt template; 14. a top stiffener; 15. an inverted L-shaped compression plate; 16. a first reinforcing connecting rod; 17. a second puller bolt; 18. a second reinforcing connecting rod; 19. a third puller bolt; 20. a bottom stiffener; 21. an auxiliary reinforcing rod; 22. and (5) soaking the cotton double-sided adhesive.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Example one
Referring to fig. 1 and 7, a formwork support system for a reverse roof lower side wall of a subway station cover-excavation section comprises a wood veneer panel 1, foundation bolts 5, a plurality of triangular supports 4, grouting holes 9 and inclined strut steel pipes 7, wherein a plurality of vertically arranged back ridges 2 are arranged on the rear side of the wood veneer panel 1, the back ridges 2 are made of square wood, the triangular supports 4 are made of steel by welding, the triangular supports 4 are arranged side by side, a plurality of double-spliced channel steels 3 are arranged on one sides of the triangular supports 4 close to the back ridges 2 at intervals from top to bottom, and the double-spliced channel steels 3 are fixed on the triangular supports 4; a channel steel pad 6 is arranged below the triangular support 4, and the channel steel pad 6 is formed by splicing two channel steels with gaps between the two channel steels; the width of the gap in the middle of the channel steel pad 6 is larger than the diameter of the foundation bolt 5.
The anchor bolts 5 are inserted into the gaps of the groove steel pads 6, the upper ends of the anchor bolts 5 are connected with the groove steel pads 6 through the tightening nuts, and cushion blocks are further arranged between the nuts on the anchor bolts 5 and the groove steel pads 6 to improve the connection efficiency.
The foundation bolts 5 are pre-buried at the positions of the middle plates which are already made below the right-angle parts of the lower ends of the triangular supports 4.
As shown in fig. 2, the lower portion of the wood plywood panel 1 is provided with a foam double-sided adhesive tape 22, the foam double-sided adhesive tape 22 can contact with the upturned portion of the side wall, and when the wood plywood panel is used, the triangular bracket 4 is used for tightly pushing the wood plywood panel 1 to compact the foam double-sided adhesive tape 22 so as to fill the gap between the side wall and the formwork and prevent slurry leakage.
As shown in fig. 1, one end of the bottom of the triangular support 4, which is far away from the side wall, is provided with an inclined strut steel pipe 7, the tail end of the inclined strut steel pipe 7 is provided with a telescopic screw head, the telescopic screw head is connected with a steel bar ground anchor 8, and the steel bar ground anchor 8 is pre-buried in a constructed middle plate.
As shown in fig. 3-6, the upper portion of the wood plywood panel 1 is provided with a plurality of grouting holes 9, and the grouting holes 9 are arranged in a trumpet shape.
As shown in fig. 7, the top of A-frame 4 is equipped with a plurality of bracing pieces 10, and bracing piece 10 is located the outside of injected hole 9, and the both ends of bracing piece 10 are equipped with the mounting panel, and the mounting panel passes through the bolt to be connected with A-frame 4, and bracing piece 10 contacts with the lateral wall board of injected hole 9 to make bracing piece 10 can support injected hole 9, improve the firm degree of injected hole 9.
In order to improve the applicability of the support bar 10, in the present embodiment, the mounting position of the support bar 10 can be adjusted on the triangular bracket 4.
As shown in fig. 7, a first tightening bolt 11 is connected to the upper portion of the triangular bracket 4 through a thread, and a support cushion block 12 is arranged between the first tightening bolt 11 and the wood plywood panel 1.
When the formwork support system is used:
as shown in fig. 6, a construction site is measured and set out, a reverse roof section is preferentially constructed, earthwork excavation work is organized, a reverse roof lower bottom plate, a negative second-layer side wall, a middle column and a middle plate are sequentially completed, the side walls are poured to the position where the middle plate is turned up by 20cm, reinforcement of the negative second-layer side wall is completed, and a water stop steel plate is welded;
the subway station negative side wall comprises a reverse roof lower cover excavation section and a standard section of an open excavation foundation pit as shown in figure 3, the cover excavation section negative side wall adopts a formwork support system of a single-side wood formwork and a triangular support, the connection standard section adopts a formwork support system of an all-steel formwork and a profile steel triangular support, and the two formwork support systems are tightly pressed to realize the conversion of the formwork systems.
The template that the section negative layer side wall was dug in lid adopts wooden veneer panel 1, and the stupefied 2 adoption square timber of vertical back of the body behind the panel, the stupefied channel-section steel that adopts of horizontal back of the body, the channel-section steel that double pin is fixed in unilateral support, unilateral support is the A-frame that is formed by the channel-section steel welding, supports the template through the triangle-shaped right angle.
The supporting height of the template needs to consider concrete pouring, a horn mouth template is reserved and erected at the position of the pouring hole 9, layered pouring is carried out, vibration is carried out in time, and the forming quality is guaranteed;
arranging post-pouring side walls between the top plate and the side walls, wherein the height of the post-pouring belt is 300-500 mm, and after the side walls are initially solidified, chiseling the bottom of the top plate and the top of the side walls and cleaning; pouring micro-expansion concrete at the position of the post-pouring side wall [4], and temporarily sealing the bell mouth template; after the concrete is poured, the maintenance is strengthened, and the forming quality and the strength of the concrete are ensured.
Example two
As shown in fig. 8 and 9, a formwork system of a subway station cover-excavation section reverse roof lower side wall comprises a wooden veneer panel 1, foundation bolts 5, a plurality of triangular supports 4, grouting holes 9 and inclined strut steel pipes 7, wherein a plurality of vertical back ridges 2 are arranged on the rear side of the wooden veneer panel 1, the back ridges 2 are made of square timber, the triangular supports 4 are made of steel by welding, the triangular supports 4 are arranged side by side, a plurality of double-spliced channel steels 3 are arranged on one sides of the triangular supports 4 close to the back ridges 2 at intervals from top to bottom, and the double-spliced channel steels 3 are fixed on the triangular supports 4; a channel steel pad 6 is arranged below the triangular support 4, and the channel steel pad 6 is formed by splicing two channel steels with gaps between the two channel steels; the width of the gap in the middle of the channel steel pad 6 is larger than the diameter of the foundation bolt 5.
A rear pouring belt template 13 is arranged above the wooden veneer panel 1, a plurality of grouting holes 9 are formed in the upper portion of the rear pouring belt template 13, and the grouting holes 9 are arranged in a horn shape.
As shown in fig. 9, the bottom of the rear casting belt formwork 13 is provided with a bottom reinforcing rod 20, and the bottom of the bottom reinforcing rod 20 is flush with the bottom of the rear casting belt formwork 13, so that the bottom reinforcing rod 20 can be in contact with the back edge 2.
The top of the post-pouring belt formwork 13 is provided with a top reinforcing rod 14, a plurality of auxiliary reinforcing rods 21 are arranged between the top reinforcing rod 14 and the bottom reinforcing rod 20, and the arrangement of the auxiliary reinforcing rods 21 enables the whole post-pouring belt formwork 13 to be more stable.
A first reinforcing connecting rod 16 and a second reinforcing connecting rod 18 are arranged at the upper part between two adjacent triangular supports 4, and the first reinforcing connecting rod 16 and the second reinforcing connecting rod 18 are not arranged between the triangles where the grouting holes 9 are located; the first reinforcing connecting rod 16 and the second reinforcing connecting rod 18 are respectively provided with a second tightening bolt 17 and a third tightening bolt 19.
An inverted L-shaped pressing plate 15 is arranged at the tail end of the second puller bolt 17, and the inverted L-shaped pressing plate 15 is in contact with the top reinforcing rod 14; when screwing up second puller bolt 17, the type of falling L pressure strip 15 can be compressed tightly and make its bottom and wooden veneer panel 1 in close contact with back pouring tape template 13, prevents to leak thick liquid, is equipped with the cotton double faced adhesive tape of bubble between wooden veneer panel 1 and the back pouring tape template 13.
When the wooden plywood is used, the wooden plywood panel 1 is erected firstly, and after the concrete poured with the side wall firstly is initially set, the bottom of the top plate and the top of the side wall poured firstly are subjected to scabbling treatment, and the later pouring belt template 13 is not installed, so that the cleaning becomes more convenient and quicker; after the cleaning is finished, the post-cast strip template is placed above the wooden plywood panel 1, the post-cast strip template 13 is erected and finished through the second tightening bolts 17, the third tightening bolts 19 and the inverted L-shaped pressing plate 15, and then the post-cast strip is cast again.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the utility model concepts of the present invention in the scope of the present invention.
Claims (10)
1. A formwork support system for a reverse roof lower side wall of a cover excavation section of a subway station comprises a wooden gluing panel (1), foundation bolts (5), triangular supports (4), grouting holes (9) and inclined strut steel pipes (7), and is characterized in that a plurality of vertical setting back ridges (2) are arranged on the rear side of the wooden gluing panel (1), the triangular supports (4) are arranged side by side, a plurality of double-spliced channel steels (3) are arranged on one sides, close to the back ridges (2), of the triangular supports (4) at intervals from top to bottom, and the double-spliced channel steels (3) are fixed on the triangular supports (4); a channel steel pad (6) is arranged below the triangular support (4), and the channel steel pad (6) is formed by splicing two channel steels with a gap between the two channel steels; the foundation bolts (5) are inserted into the gaps of the channel steel pads (6), and the upper ends of the foundation bolts (5) are screwed up to enable the foundation bolts (5) to be connected with the channel steel pads (6); one end, far away from the side wall, of the bottom of the triangular support (4) is provided with an inclined strut steel pipe (7), the tail end of the inclined strut steel pipe (7) is provided with a telescopic screw head, a reinforcing steel bar ground anchor (8) is connected to the telescopic screw head, and the reinforcing steel bar ground anchor (8) is pre-buried in a manufactured middle plate.
2. The formwork system of the bottom wall of the top plate of the cover and excavation section of the subway station as claimed in claim 1, wherein the width of the gap in the middle of the channel steel pad (6) is greater than the diameter of the anchor bolt (5).
3. The formwork system of the bottom wall of the top plate of the cover and excavation section of the subway station as claimed in claim 1, wherein the lower part of the wood veneer panel (1) is provided with a double faced adhesive tape (22) of foam cotton.
4. The formwork system for the bottom wall of the top plate of the cover excavation section of the subway station as claimed in claim 1, wherein the upper part of the wood veneer panel (1) is provided with a plurality of grouting holes (9), and the grouting holes (9) are arranged in a trumpet shape.
5. The formwork supporting system for the bottom side wall of the top plate of the cover-excavation section of the subway station as claimed in claim 1, wherein a plurality of support rods (10) are provided at the top end of the triangular support (4), the support rods (10) are located at the outer side of the grouting hole (9), a first puller bolt (11) is connected to the upper portion of the triangular support (4) in a threaded manner, and a support cushion block (12) is provided between the first puller bolt (11) and the wooden plywood panel (1).
6. The formwork support system for the bottom side wall of the top plate of the cover-excavation section of the subway station as claimed in any one of claims 1 to 5, wherein a rear pouring belt formwork (13) is arranged above the wooden plywood panel (1), a plurality of grouting holes (9) are formed in the upper portion of the rear pouring belt formwork (13), and the grouting holes (9) are arranged in a trumpet shape.
7. The formwork support system for the reverse construction of the lower side wall of the top plate of the cover and excavation section of the subway station as claimed in claim 6, wherein a bottom reinforcing rod (20) is arranged at the bottom of the rear pouring belt formwork (13), and the bottom of the bottom reinforcing rod (20) is flush with the bottom of the rear pouring belt formwork (13); the top of the rear pouring belt formwork (13) is provided with a top reinforcing rod (14), and a plurality of auxiliary reinforcing rods (21) are arranged between the top reinforcing rod (14) and the bottom reinforcing rod (20).
8. The formwork support system for the reverse-construction roof lower side wall of the cover and excavation section of the subway station as claimed in any one of claims 1 to 5, wherein a first reinforcing connecting rod (16) and a second reinforcing connecting rod (18) are arranged at the upper part between two adjacent triangular supports (4), and the first reinforcing connecting rod (16) and the second reinforcing connecting rod (18) are not arranged between the triangles where the grouting holes (9) are located; and a second tightening bolt (17) and a third tightening bolt (19) are respectively arranged on the first reinforcing connecting rod (16) and the second reinforcing connecting rod (18).
9. The formwork system for the bottom wall of the top plate of the cover and excavation section of the subway station as claimed in claim 8, wherein an inverted L-shaped pressing plate (15) is provided at the end of the second jacking bolt (17), and the inverted L-shaped pressing plate (15) is in contact with the top reinforcing rod (14).
10. The formwork system for the bottom side wall of the top plate of the cover and excavation section of the subway station as claimed in any one of claims 1 to 5, wherein a foam double faced adhesive tape is arranged between the wood veneer panel (1) and the rear pouring tape formwork (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220736177.8U CN216920439U (en) | 2022-03-31 | 2022-03-31 | Formwork support system for bottom side wall of top plate of cover excavation section of subway station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220736177.8U CN216920439U (en) | 2022-03-31 | 2022-03-31 | Formwork support system for bottom side wall of top plate of cover excavation section of subway station |
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| CN216920439U true CN216920439U (en) | 2022-07-08 |
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| CN202220736177.8U Active CN216920439U (en) | 2022-03-31 | 2022-03-31 | Formwork support system for bottom side wall of top plate of cover excavation section of subway station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024011786A1 (en) * | 2022-07-13 | 2024-01-18 | 中铁上海工程局集团有限公司 | Internal and external corner construction structure and construction method |
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- 2022-03-31 CN CN202220736177.8U patent/CN216920439U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024011786A1 (en) * | 2022-07-13 | 2024-01-18 | 中铁上海工程局集团有限公司 | Internal and external corner construction structure and construction method |
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