CN217870523U - Deep and large foundation pit ring beam inner supporting structure of post-cast strip type steel dowel bar - Google Patents
Deep and large foundation pit ring beam inner supporting structure of post-cast strip type steel dowel bar Download PDFInfo
- Publication number
- CN217870523U CN217870523U CN202222196377.1U CN202222196377U CN217870523U CN 217870523 U CN217870523 U CN 217870523U CN 202222196377 U CN202222196377 U CN 202222196377U CN 217870523 U CN217870523 U CN 217870523U
- Authority
- CN
- China
- Prior art keywords
- support
- post
- cast strip
- dowel bar
- foundation pit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Foundations (AREA)
Abstract
The application relates to the technical field of foundation pit support, especially, relate to a deep foundation pit ring beam inner supporting structure of post-cast strip shaped steel dowel steel, the post-cast strip department of basement burden two floor and burden one deck floor all is provided with shaped steel dowel steel, the frame roof beam is installed to the post-cast strip of burden one deck floor, one side of frame roof beam is provided with the dowel steel roof beam, the outside of burden two floor's bottom plate is provided with plain concrete biography power area, it is provided with biography power concrete beam to burden between the outer wall of one deck floor and the support, in order to improve foundation pit work progress's structural stability, this application provides a deep foundation pit ring beam inner supporting structure of post-cast strip shaped steel dowel steel.
Description
Technical Field
The application relates to the technical field of foundation pit support, in particular to an inner support structure of a ring beam of a deep and large foundation pit of a post-cast strip type steel dowel bar.
Background
In recent years, in the construction of deep foundation pit support, an inner support system is widely applied to large-scale building engineering, and in recent years, a large-scale deep foundation pit adopts a horizontal inner support combined support form of a support pile, a ring beam, a diagonal brace, an inclined brace and the like, so that powerful guarantee is provided for the safety of the foundation pit.
Present interior support system of strutting up is along with underground major structure's successive layer is under construction, the interlude of interior support sets up inevitably to hinder the major structure construction, the staff can divide into a plurality of independent unit to major structure usually, then demolish internal support, at this moment, soil pressure can make the structure of main part produce great displacement, can influence structural safety, and, many support at the four sides of foundation ditch among the prior art, it is big to the area, the middle part of the deep foundation ditch of the degree of depth does not have supporting mechanism, still can not satisfy the foundation ditch construction demand.
Disclosure of Invention
In order to improve the structural stability of foundation ditch work progress, this application provides a deep large foundation ditch ring beam inner support structure of post-cast strip shaped steel dowel bar.
The application provides a pair of deep and large foundation ditch ring beam inner support structure of post-cast strip shaped steel dowel steel adopts following technical scheme:
the utility model provides a deep large foundation ditch ring beam inner supporting structure of post-cast strip shaped steel dowel steel, the post-cast strip department of basement burden two floors and burden one deck floor all is provided with the shaped steel dowel steel, the frame roof beam is installed in the post-cast strip of burden one deck floor, one side of frame roof beam is provided with the dowel steel roof beam, the outside of burden two floors is provided with plain concrete biography power belt, be provided with biography power concrete beam between the outer wall of burden one deck floor and the support.
By adopting the technical scheme, the post-cast strip of the negative floor slab is provided with the frame beam and the force transmission rod beam, and the post-cast strip plate part is provided with the pre-embedded profile steel force transmission rod combined support-replacing technology, so that the basement structure forms a whole, the situation that the structure is deformed or cracked due to the fact that the structure bears the soil pressure when the support is dismantled is favorably reduced, the stability of the foundation pit support structure when the support is dismantled can be ensured under the matching action of the plain concrete force transmission strip and the force transmission concrete beam, the construction process is more efficient, environment-friendly and safe by using the inner support structure, and the requirement of foundation pit construction can be met.
Preferably, the power transmission concrete beam comprises a support changing beam and a support changing beam, the support changing beam is fixed to the top surface of the support changing beam, and the bottom surface of the support changing beam is abutted to the outer wall of the negative floor.
By adopting the technical scheme, the force transfer concrete beam comprises the support changing beam and the support changing beam, and the corresponding floor part of the negative floor can be subjected to back jacking reinforcement to play a role in enhancing the stability of the inner support structure.
Preferably, the support changing support beams are provided in number, and the distance between the support changing support beams is 2m.
Through adopting above-mentioned technical scheme, it has a plurality of to trade to prop a supporting beam to a plurality of trade and prop interval between the supporting beam and be 2m, can alleviate inner support structure's weight on the one hand, practice thrift construction cost, on the other hand makes inner support structure's internal force evenly release, reduces concentrated stress's production, is favorable to increase of service life.
Preferably, a plurality of cast-in-place piles are arranged on one side, away from the support changing supporting beam, of the support changing cross beam, and the cast-in-place piles are evenly distributed on the same horizontal line.
Through adopting above-mentioned technical scheme, the bored concrete pile can provide the supporting role for each floor of basement, guarantees that the braced system in the foundation ditch is enough firm, satisfies the stability of concrete placement work progress to and guarantee the operation security that the staff was under construction.
Preferably, shaped steel dowel bar includes the steel anchor, closes up net fixed muscle and split heads muscle, the both ends of steel anchor insert respectively in the two walls of post-cast strip, the juncture at shaped steel dowel bar and wall body is fixed to the net fixed muscle that closes up, the split heads muscle is fixed the bottom of steel anchor.
Through adopting above-mentioned technical scheme, under the mating reaction of steel anchor, binding off net fixed muscle and split heads muscle, guarantee that shaped steel dowel bar is pre-buried reliable and stable, level and difficult slope, be favorable to guaranteeing the operation security that the staff was under construction.
Preferably, the side of the support-replacing cross beam, which is far away from the negative floor, is provided with a support pile, and the support pile, the support-replacing support beam and the support-replacing cross beam are all embedded with reinforcing steel bars.
By adopting the technical scheme, the reinforcing steel bars are implanted into the supporting piles, the support replacing supporting beams and the support replacing cross beams, so that the inner supporting structure is more stable and reliable, and the stability of the inner supporting structure is improved.
Preferably, an indentation is chiseled in one fourth of the circumference of the cast-in-place pile, and the indentation is arranged on one side of the cast-in-place pile, which is close to the bracing-changing cross beam.
Through adopting above-mentioned technical scheme, when pouring the concrete to bored concrete pile and trade the brace crossbeam, there is the dent through the stake week chisel at the bored concrete pile, can make construction surface between them bond firmly, is favorable to strengthening foundation ditch work progress's structural stability.
Preferably, the section steel dowel bar is an H-shaped dowel bar.
Through adopting above-mentioned technical scheme, shaped steel dowel bar is the dowel bar of H type, makes shaped steel dowel bar have good structural stability to reduce shaped steel dowel bar atress and take place to warp.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the support replacement technology of the frame beam and the force transmission rod beam arranged at the post-cast strip of the negative floor and the pre-embedded profile steel force transmission rod combination at the plate part of the post-cast strip enables the basement structure to form a whole, thereby being beneficial to reducing the condition of structural deformation or cracking caused by bearing the soil pressure during the support removal, and ensuring the stability of the foundation pit support structure during the support removal under the matching action of the plain concrete force transmission strip and the force transmission concrete beam;
2. under the matching action of the steel anchor, the closing net fixing rib and the split heads, the steel section dowel bar is ensured to be embedded stably, reliably, flatly and not to incline, and the operation safety of construction of workers is ensured;
3. the reinforcing steel bars are implanted into the supporting piles, the supporting beams and the supporting cross beams, so that the inner supporting structure is more stable and reliable, and the stability of the inner supporting structure is improved.
Drawings
FIG. 1 is a pre-buried rough drawing of a post-cast strip section steel dowel bar in the embodiment of the application.
FIG. 2 is a reinforcement diagram of a shoring support beam and shoring cross beam in an embodiment of the present application.
FIG. 3 is a diagram of the steel bar anchoring at the position of the support-changing supporting beam and the support-changing cross beam in the embodiment of the present application.
FIG. 4 is a plan view of a sprag beam and sprag cross beam in an embodiment of the present application.
Description of reference numerals: 1. carrying out floor slab laying; 2. negative two-layer bottom plate; 3. a section steel dowel bar; 31. a steel anchor; 32. fixing ribs of the closing net; 33. a horse stool rib; 34. gluten; 35. a bottom rib; 4. a force transfer concrete beam; 41. changing a support beam; 42. changing a support beam; 5. filling a pile; 51. a dent; 6. supporting piles; 71. reinforcing steel bars; 72. a steel strip.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses post-cast strip shaped steel dowel bar's deep and large foundation ditch ring beam inner support structure.
Referring to fig. 1 and 2, the ring beam inner supporting structure of the deep and large foundation pit of the post-cast strip type steel dowel bar is characterized in that the plane of the deep foundation pit is in a parallelogram shape, a foundation pit support is composed of a cast-in-place pile 5 and a horizontal inner support, the horizontal inner support adopts a combination form of a ring beam, a corner brace and a oppositely-supported reinforced bar 71 concrete beam plate, and each layer of plane structure of the basement is divided into a plurality of independent areas by the post-cast strip.
The basement is born two floors of bottom plates 2 and is born the post-cast strip department of one deck floor 1 and all be provided with shaped steel dowel bar 3, in this application embodiment, shaped steel dowel bar 3 is the dowel bar of H type, make shaped steel dowel bar 3 have good structural rigidity, and, refer to fig. 1 and fig. 2, after the staff accomplishes the ligature to post-cast strip one side reinforcing bar 71, pre-embed to shaped steel dowel bar 3, concretely, shaped steel dowel bar 3 includes steel anchor 31, binding off net fixed rib 32 and split heads muscle 33, the both ends of steel anchor 31 are inserted respectively in the two walls of post-cast strip, binding off net fixed rib 32 welds in the juncture of shaped steel dowel bar 3 and wall, can consolidate the section of wall body, in order to guarantee that shaped steel dowel bar 3 is pre-buried reliable and stable, make the wall body level, difficult the slope takes place, split heads muscle 33 is fixed in the bottom of steel anchor 31, make split heads muscle 33 and binding off net fixed rib 32 apart from 0.1m.
In order to further improve shaped steel dowel bar 3's installation stability, gluten 34 is installed to shaped steel dowel bar 3's top position, and muscle 35 is at the bottom of shaped steel dowel bar 3's the bottom position installation, can further strengthen shaped steel dowel bar 3's structural rigidity, reduces deformation.
Referring to fig. 1 and 2, a frame beam is installed on a post-cast strip of a negative floor slab 1, a force transmission rod beam is arranged on one side of the frame beam, a plain concrete force transmission strip is arranged on the outer side of a negative two-layer bottom plate 2, and a force transmission concrete beam 4 is arranged between an outer wall of the negative one-layer floor slab 1 and a support, so that a basement beam slab structure forms a whole to form a new horizontal support, and the horizontal support and a foundation pit support pile 6 share the lateral soil pressure after the inner support is removed, and the safety of a main structure and foundation pit construction is guaranteed.
Specifically, in the embodiment of the application, the plain concrete force transfer belt is a 650mm thick C20 force transfer belt, the force transfer bar beam is a reinforced 71 concrete force transfer bar beam, and a C20 micro-expansion concrete layer is poured outside the force transfer bar beam. After the staff demolish and prop the completion, need chisel earlier and remove C20 micro-expansion concrete layer, then pour the post-cast strip, can improve the operation security to a certain extent.
Referring to fig. 3 and 4, biography power concrete beam 4 is including trading and propping a supporting beam 41 and trading a crossbeam 42, it fixes at the top surface of trading a supporting beam 41 to trade a crossbeam 42, trade the bottom surface of propping a supporting beam 41 and the outer wall looks butt of burden one deck floor 1, moreover, it has a plurality of to trade a supporting beam 41, a plurality of trades the interval of propping between a supporting beam 41 and is 2m, it is provided with a plurality of bored concrete pile 5 to trade one side that props a supporting beam 41 to trade a crossbeam 42 and keep away from to trade, a plurality of bored concrete pile 5 evenly lays on same water flat line, the staff tamps one side that is provided with bored concrete pile 5, it props a supporting beam 41 and trades a crossbeam 42 and forms an organic whole structure to make, play the effect of reinforcing structure stability.
In addition, referring to fig. 2 and 3, a support pile 6 is arranged on one side of the support change beam 42 away from the floor slab 1, reinforcing steel bars 71 are implanted in the support pile 6, the support change beam 41 and the support change beam 42, the implantation depth of the reinforcing steel bars 71 is 400mm, a C30 concrete layer is poured outside the support change beam 41, more specifically, a dent 51 is chiseled in one fourth of the circumference of the cast-in-place pile 5, the dent 51 is arranged on one side of the cast-in-place pile 5 close to the support change beam 42, steel bars 72 are also implanted in the position of the cast-in-place pile 5 where the dent 51 is chiseled, two steel bars 72 are implanted into each cast-in-place pile 5, the two steel bars 72 are arranged in parallel, one end of the steel bar 72 is implanted in the cast-in-place pile 5, and the other end of the support change beam 42, so that the new horizontal support is stable, sealed and flat, has sufficient strength, rigidity and stability, and meets the stability of the subsequent construction.
The implementation principle of the deep and large foundation pit ring beam inner support structure of the post-cast strip type steel dowel bar in the embodiment of the application is as follows:
the post-cast strip of the basement negative second floor 2 and the negative first floor 1 is provided with a section steel dowel bar 3, the post-cast strip of the negative first floor 1 is provided with a frame beam, one side of the frame beam is provided with the dowel bar beam, C20 micro-expansion concrete is adopted for pouring, after the support is removed, micro-expansion concrete is chiseled (the post-cast strip can be removed when the strength reaches 85% of the design requirement), and the post-cast strip concrete is poured according to the design requirement.
And then, a plain concrete force transfer belt is arranged on the outer side of the bottom plate 2 on the negative two floors, a force transfer concrete beam 4 is arranged between the outer wall of the floor plate 1 on the negative one floor and the support, so that the basement beam-plate structure forms a whole to form a new horizontal support, meanwhile, reinforcing steel bars 71 are implanted in the support piles 6, the support change supporting beams 41 and the support change cross beams 42, and steel bars 72 are also implanted at the positions where the dents 51 are chiseled out of the cast-in-place piles 5, so that the structural stability of the new horizontal support is improved.
The above are all preferred embodiments of the present application, and the present embodiment is only explained for the present application, and the protection scope of the present application is not limited by this, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a deep big foundation ditch ring beam inner supporting structure of post-cast strip shaped steel dowel steel, its characterized in that, basement burden two floor (2) and the post-cast strip department of burden one deck floor (1) all are provided with shaped steel dowel steel (3), the frame roof beam is installed in the post-cast strip of burden one deck floor (1), one side of frame roof beam is provided with the dowel steel roof beam, the outside of burden two floor (2) is provided with plain concrete biography power area, be provided with biography power concrete beam (4) between the outer wall of burden one deck floor (1) and the support.
2. The support structure in the ring beam of the deep and large foundation pit of the post-cast strip type steel dowel bar of claim 1, characterized in that the dowel concrete beam (4) comprises a support changing supporting beam (41) and a support changing cross beam (42), the support changing cross beam (42) is fixed on the top surface of the support changing supporting beam (41), and the bottom surface of the support changing supporting beam (41) is abutted to the outer wall of the floor slab (1).
3. The support structure for the ring beam of the deep and large foundation pit of the post-cast strip type steel dowel bar according to claim 2, characterized in that the number of the support-changing support beams (41) is several, and the distance between the several support-changing support beams (41) is 2m.
4. The support structure in the ring beam of the deep and large foundation pit of the post-cast strip type steel dowel bar of claim 2, wherein a plurality of cast-in-place piles (5) are arranged on one side of the support changing cross beam (42) far away from the support changing support beam (41), and the cast-in-place piles (5) are uniformly distributed on the same horizontal line.
5. The supporting structure in the ring beam of the deep and large foundation pit of a post-cast strip type steel dowel bar of claim 1, wherein the type steel dowel bar (3) comprises a steel anchor (31), a closing-up net fixing rib (32) and a horse stool rib (33), two ends of the steel anchor (31) are respectively inserted into two wall bodies of a post-cast strip, the closing-up net fixing rib (32) is fixed at the junction of the type steel dowel bar (3) and the wall bodies, and the horse stool rib (33) is fixed at the bottom of the steel anchor (31).
6. The deep foundation pit ring beam inner support structure of the post-cast strip type steel dowel bar according to claim 2, wherein a support pile (6) is arranged on one side, away from the negative floor (1), of the support-changing beam (42), and reinforcing steel bars (71) are implanted in the support pile (6), the support-changing support beam (41) and the support-changing beam (42).
7. The support structure in the ring beam of the deep large foundation pit of the post-cast strip type steel dowel bar of claim 4, characterized in that an indentation (51) is chiseled in the one fourth of the circumference of the cast-in-place pile (5), and the indentation (51) is arranged on one side of the cast-in-place pile (5) close to the bracing change beam (42).
8. The support structure in the ring beam of the deep and large foundation pit of the post-cast strip type steel dowel bar of claim 1, characterized in that the type steel dowel bar (3) is an H-shaped dowel bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222196377.1U CN217870523U (en) | 2022-08-20 | 2022-08-20 | Deep and large foundation pit ring beam inner supporting structure of post-cast strip type steel dowel bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222196377.1U CN217870523U (en) | 2022-08-20 | 2022-08-20 | Deep and large foundation pit ring beam inner supporting structure of post-cast strip type steel dowel bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217870523U true CN217870523U (en) | 2022-11-22 |
Family
ID=84078353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222196377.1U Active CN217870523U (en) | 2022-08-20 | 2022-08-20 | Deep and large foundation pit ring beam inner supporting structure of post-cast strip type steel dowel bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217870523U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115787671A (en) * | 2023-01-06 | 2023-03-14 | 中建八局第二建设有限公司 | Large foundation pit engineering support changing method |
-
2022
- 2022-08-20 CN CN202222196377.1U patent/CN217870523U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115787671A (en) * | 2023-01-06 | 2023-03-14 | 中建八局第二建设有限公司 | Large foundation pit engineering support changing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104878766B (en) | A kind of long side slope protection concrete continuous fast pouring drawing-die system and construction method | |
| CN112962663B (en) | Construction method for narrow outer enclosure space of deep foundation | |
| CN106836463A (en) | The constructing device and construction method of cushion cap and ground girder construction | |
| CN217870523U (en) | Deep and large foundation pit ring beam inner supporting structure of post-cast strip type steel dowel bar | |
| CN108385693B (en) | Equal-generation anchor bolt supporting method and system for staged basement supporting | |
| CN108797323B (en) | Steel trestle suitable for hard stratum | |
| CN109056710B (en) | Hard stratum steel pipe pile and construction method thereof | |
| CN212801564U (en) | Foundation ditch steel sheet pile supporting construction | |
| CN210106749U (en) | Counter-force structure of soft soil foundation super large section push pipe jacking operation | |
| CN115094912B (en) | Cross-partition forward and reverse combined construction method for super-large soft soil foundation pit upper building | |
| CN106400814A (en) | Foundation pit supporting method | |
| CN214363595U (en) | Construction elevator foundation | |
| CN116464060A (en) | Construction method for accelerating high-span region structure at high-low span position of basement bottom plate | |
| CN112329107B (en) | Bridge span type bearing structure of cross tunnel proximity region and calculation method | |
| CN112813852B (en) | Repairing and reinforcing method for bridge deck subsidence of in-service bridge | |
| CN110424245B (en) | Large-span tied arch bridge reconstruction method based on bridge hydraulic jacking system | |
| CN211772879U (en) | Spacing top of steel case roof beam hoist and mount pushes away construction structures | |
| CN211037088U (en) | Jacking deviation correcting device for high-rise shear wall structure | |
| CN211006518U (en) | Novel sheet pile wharf structure | |
| CN110700069A (en) | Su dyke arched bridge structure | |
| CN212153271U (en) | Retaining wall repairing structure | |
| CN212612252U (en) | Wharf upgrading and transforming structure | |
| CN110656576A (en) | Pier structure and construction method thereof | |
| CN115387373B (en) | Construction method of water surface bearing platform | |
| CN219653491U (en) | Steel construction abutment suitable for steel trestle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |