CN213978971U - Combined foundation pit supporting structure - Google Patents
Combined foundation pit supporting structure Download PDFInfo
- Publication number
- CN213978971U CN213978971U CN202022295968.5U CN202022295968U CN213978971U CN 213978971 U CN213978971 U CN 213978971U CN 202022295968 U CN202022295968 U CN 202022295968U CN 213978971 U CN213978971 U CN 213978971U
- Authority
- CN
- China
- Prior art keywords
- pipe pile
- steel pipe
- grouting
- pile
- steel
- 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
Abstract
The utility model discloses a combination foundation ditch bearing structure, including single triaxial soil cement mixing pile, capping beam, forward grouting steel pipe pile, check valve and assembled steel sheet, the inboard of single triaxial soil cement mixing pile is connected with internal stay H shaped steel, the top of single triaxial soil cement mixing pile is provided with the capping beam, the inboard of internal stay H shaped steel is provided with forward grouting steel pipe pile, the lateral surface welding of forward grouting steel pipe pile has the reinforcement dish, the outside of forward grouting steel pipe pile is provided with the reaming bag, the below of structural cushion is provided with the assembled steel sheet. This combination foundation ditch bearing structure forms the slip casting enlarged footing, effectively reduces the dispersion that the unordered seepage of thick liquid arouses and pollutes groundwater scheduling problem, makes things convenient for the dismouting of leading formula slip casting steel-pipe pile and internal stay H shaped steel, improves the holistic bearing capacity that constitutes by leading formula slip casting steel-pipe pile and reinforcing disc.
Description
Technical Field
The utility model relates to a foundation ditch supports technical field, specifically is a combination foundation ditch bearing structure.
Background
The traditional large-span foundation pit excavation process mostly adopts an inner supporting and protecting structure of a cast-in-place reinforced concrete inner support or steel support, the inner supporting and protecting structure is arranged in a plurality of layers along the depth of a foundation pit, so that the excavation site is limited, the construction speed is blocked, the construction difficulty is increased, the construction is carried out along with the underground structure one by one during the dismantling process, a considerable part of construction progress is also needed, a large amount of wastes which are difficult to recover are generated after the dismantling process, and a combined foundation pit supporting system of combining an SMW construction method pile with a front grouting steel pipe is proposed in the market aiming at the problems.
However, when the existing combined foundation pit supporting structure is used for grouting, the problems of discreteness caused by disordered seepage of slurry, underground water pollution and the like are easily generated during grouting, the front-mounted grouting steel pipe pile and the inner support H-shaped steel are fixed in a welding mode, the front-mounted grouting steel pipe pile and the inner support H-shaped steel are inconvenient to disassemble and assemble, and the bearing capacity of the front-mounted grouting steel pipe pile is low, so that the combined foundation pit supporting structure is provided, and the problems are solved conveniently.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a combination foundation ditch bearing structure to when solving the current combination foundation ditch bearing structure slip casting that proposes in the above-mentioned background art, easily produce the dispersion that the unordered seepage flow of thick liquid arouses and pollute groundwater scheduling problem during the slip casting, inconvenient front-mounted grouting steel pipe pile and the dismouting of internal stay H shaped steel, the lower problem of front-mounted grouting steel pipe pile bearing capacity.
In order to achieve the above object, the utility model provides a following technical scheme: a combined foundation pit supporting structure comprises single-row triaxial cemented soil mixing piles, a capping beam, front-mounted grouting steel pipe piles, a check valve and an assembled steel plate, wherein the inner sides of the single-row triaxial cemented soil mixing piles are connected with inner-bracing H-shaped steel, the right sides of the single-row triaxial cemented soil mixing piles are fixedly connected with bracing-replacing brackets, the top ends of the single-row triaxial cemented soil mixing piles are provided with the capping beam, the right sides of the single-row triaxial cemented soil mixing piles are provided with structural cushions below the bracing-replacing brackets, the inner sides of the inner-bracing H-shaped steel are provided with the front-mounted grouting steel pipe piles, the outer side surfaces of the top ends of the front-mounted grouting steel pipe piles are welded with mounting pieces, pipe side grouting holes are formed in the front-mounted grouting steel pipe piles, the check valve is installed in the pipe side grouting holes, reinforcing discs are welded on the outer side surfaces of the front-mounted grouting steel pipe piles, and pile heads are integrally connected to the bottom ends of the front-mounted grouting steel pipe piles, the outer side of the front grouting steel pipe pile is provided with a reaming bag, the outer side of the reaming bag is provided with a hoop, and an assembled steel plate is arranged below the structural cushion layer.
Preferably, the front grouting steel pipe pile is obliquely arranged on the inner side of the inner-supporting H-shaped steel, and the mounting sheet is fixedly connected with the inner-supporting H-shaped steel through a bolt.
Preferably, the pipe side grouting holes are arranged in the front grouting steel pipe pile at equal angles, and the assembled steel plate and the front grouting steel pipe pile are connected in a welding mode.
Preferably, the reinforcing disc is symmetrically arranged about the transverse center line of the pipe side grout pressing hole, and the outer end of the reinforcing disc is of a saw-toothed structure.
Preferably, the longitudinal section of the pile head of the steel pipe pile is of a triangular structure, and a pile head grout outlet is formed in the pile head of the steel pipe pile.
Preferably, the reaming bag is fixed on the front grouting steel pipe pile through a hoop, and the hoops are arranged on the outer side of the front grouting steel pipe pile at equal intervals.
Compared with the prior art, the beneficial effects of the utility model are that: the combined foundation pit supporting structure forms a grouting expanded body, effectively reduces the problems of discreteness, underground water pollution and the like caused by disordered seepage of slurry, facilitates the disassembly and assembly of the front grouting steel pipe pile and the inner support H-shaped steel, and improves the integral bearing capacity formed by the front grouting steel pipe pile and the reinforcing disc;
1. the pre-grouting steel pipe pile and the reaming bag are arranged, the reaming bag is installed on the pre-grouting steel pipe pile through the hoop to form a grouting enlarged body, and the reaming bag can effectively reduce the problems of discreteness, underground water pollution and the like caused by disordered seepage of slurry;
2. the front-mounted grouting steel pipe pile and the mounting pieces are arranged, and the mounting pieces welded on the outer side surface of the top end of the front-mounted grouting steel pipe pile are fixedly connected with the inner support H-shaped steel through bolts, so that the front-mounted grouting steel pipe pile and the inner support H-shaped steel are convenient to disassemble and assemble;
3. the front-mounted grouting steel pipe pile and the reinforcing disc are arranged, the reinforcing disc with the outer end in a sawtooth structure is welded on the outer side of the front-mounted grouting steel pipe pile at equal intervals, after grouting, the reinforcing disc is located in grout, the contact surface of the reinforcing disc and the grout is enlarged, and the integral bearing capacity formed by the front-mounted grouting steel pipe pile and the reinforcing disc is improved.
Drawings
FIG. 1 is a front view of the cutting structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;
FIG. 3 is a schematic view of the front-view structure of the ferrule and the front-mounted grouting steel pipe pile of the present invention;
fig. 4 is a schematic view of the overlooking structure of the connection between the hoop and the front grouting steel pipe pile of the present invention.
In the figure: 1. single-row triaxial cement-soil mixing piles; 2. internally supporting H-shaped steel; 3. replacing the support bracket; 4. pressing a top beam; 5. a structural cushion layer; 6. front-mounted grouting steel pipe piles; 7. mounting a sheet; 8. pressing pulp holes at the side of the pipe; 9. a check valve; 10. reinforcing the disc; 11. a steel pipe pile head; 12. pile head grout outlet holes; 13. reaming the bladder; 14. a ferrule; 15. assembled steel sheet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a combined foundation pit supporting structure comprises a single-row three-axis cement-soil mixing pile 1, an inner-support H-shaped steel 2, a support-replacing bracket 3, a capping beam 4, a structural cushion 5, a front-mounted grouting steel pipe pile 6, an installation sheet 7, a pipe side grouting hole 8, a check valve 9, a reinforcing disc 10, a steel pipe pile head 11, a pile head grout outlet hole 12, a reaming bag 13, a hoop 14 and an assembled steel plate 15, wherein the inner side of the single-row three-axis cement-soil mixing pile 1 is connected with the inner-support H-shaped steel 2, the right side of the single-row three-axis cement-soil mixing pile 1 is fixedly connected with the support-replacing bracket 3, the top end of the single-row three-axis cement-soil mixing pile 1 is provided with the capping beam 4, the right side of the single-row three-axis cement-soil mixing pile 1 is provided with the structural cushion 5 positioned below the support-replacing bracket 3, the inner side of the inner-support H-shaped steel 2 is provided with the front-mounted grouting steel pipe pile 6, and the installation sheet 7 is welded on the top end of the front-mounted grouting steel pipe pile 6, a pipe side grouting hole 8 is formed in the front grouting steel pipe pile 6, a check valve 9 is installed in the pipe side grouting hole 8, a reinforcing disc 10 is welded on the outer side surface of the front grouting steel pipe pile 6, a steel pipe pile head 11 is integrally connected to the bottom end of the front grouting steel pipe pile 6, a reaming bag 13 is arranged on the outer side of the front grouting steel pipe pile 6, a hoop 14 is arranged on the outer side of the reaming bag 13, and an assembly type steel plate 15 is arranged below the structural cushion 5;
as shown in fig. 1, 2 and 3, the front grouting steel pipe pile 6 is obliquely arranged on the inner side of the inner support H-shaped steel 2, and the installation sheet 7 is fixedly connected with the inner support H-shaped steel 2 through a bolt, so that the front grouting steel pipe pile 6 and the inner support H-shaped steel 2 can be conveniently disassembled and assembled, the reinforcing disc 10 is symmetrically arranged about the transverse central line of the pipe side grouting hole 8, the outer end of the reinforcing disc 10 is of a zigzag structure, the contact surface is enlarged, the bearing capacity is improved, the longitudinal section of the steel pipe pile head 11 is of a triangular structure, and the steel pipe pile head grouting hole 12 is formed in the steel pipe pile head 11, so that the front grouting steel pipe pile 6 can be conveniently inserted;
as shown in fig. 1, 3 and 4, the pipe side grout pressing holes 8 are arranged in the front grouting steel pipe pile 6 at equal angles, the assembled steel plate 15 and the front grouting steel pipe pile 6 are connected in a welding mode and are quickly grouted, the reaming bag 13 is fixed on the front grouting steel pipe pile 6 through the hoop 14, and the hoops 14 are arranged on the outer side of the front grouting steel pipe pile 6 at equal intervals, so that the stability of the installation structure is improved.
The working principle is as follows: when the combined foundation pit supporting structure is used, firstly, a pile of an SMW construction method is used for enclosing, the inclined strut position outside a reinforced concrete enclosing purlin is measured and paid off, an inner-strut H-shaped steel 2 is inserted after a guide groove is excavated, meanwhile, a front-mounted grouting steel pipe pile 6 which reaches the bottom of a pit is constructed, a pipe side grouting hole 8 is formed in the front-mounted grouting steel pipe pile 6, a pile head grout outlet hole 12 is formed in the bottom end of a pile head 11 of the steel pipe pile, a layer of reaming bag 13 is bound on the surface of the pipe side grouting hole 8 through a hoop 14 to form a grouting expanded body, a check valve 9 is installed in each pipe side grouting hole 8, and mud is prevented from being poured backwards through the check valve 9;
grouting the interior of a front grouting steel pipe pile 6, enabling cement slurry to pass through a pipe side grouting hole 8 and a pile head grout outlet hole 12, squeezing the cement slurry into a soil body through high pressure, forming a water-drop-shaped hardened soil area at the position of a steel pipe pile head 11 and the periphery of the front grouting steel pipe pile 6, after grouting of the front grouting steel pipe pile 6 is completed, enabling a reinforcing disc 10 to be located in the slurry, enlarging the contact surface of the reinforcing disc 10 and the slurry due to the fact that the outer end of the reinforcing disc 10 is of a zigzag structure, improving the bearing capacity of the whole formed by the front grouting steel pipe pile 6 and the reinforcing disc 10, filling graded broken stones into the interior of the front grouting steel pipe pile 6, welding an assembled steel plate 15 on the outer side of the front grouting steel pipe pile 6, connecting a single-row three-shaft cement soil stirring pile 1 to form a combined supporting system, and when top plate construction and maintenance of a basement are completed, fixedly connecting an installation piece 7 on the outer side face of the top of the front grouting steel pipe pile 6 with an inner support H2 through a bolt, and (3) taking down the bolts, cutting off the preposed grouting steel pipe pile 6 on the structural cushion 5 by using a cutting tool, and removing the preposed grouting steel pipe pile 6, so as to finish a series of operations of the combined foundation pit supporting structure, wherein the content which is not described in detail in the description belongs to the prior art which is well known by a person skilled in the art.
The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a combination foundation ditch bearing structure, includes single triaxial soil cement mixing pile (1), capping beam (4), forward formula slip casting steel-pipe pile (6), check valve (9) and assembled steel sheet (15), its characterized in that: the inner side of the single-row triaxial cemented soil mixing pile (1) is connected with an inner-support H-shaped steel (2), the right side of the single-row triaxial cemented soil mixing pile (1) is fixedly connected with a support-changing bracket (3), the top end of the single-row triaxial cemented soil mixing pile (1) is provided with a capping beam (4), the right side of the single-row triaxial cemented soil mixing pile (1) is provided with a structural cushion layer (5) positioned below the support-changing bracket (3), the inner side of the inner-support H-shaped steel (2) is provided with a front-mounted grouting steel pipe pile (6), the outer side surface of the top end of the front-mounted grouting steel pipe pile (6) is welded with an installation sheet (7), a pipe side grouting hole (8) is formed in the front-mounted grouting steel pipe pile (6), a check valve (9) is arranged in the pipe side grouting hole (8), and a reinforcing disc (10) is welded on the outer side surface of the front-mounted grouting steel pipe pile (6), and the bottom end of the front grouting steel pipe pile (6) is integrally connected with a steel pipe pile head (11), a reaming bag (13) is arranged on the outer side of the front grouting steel pipe pile (6), a hoop (14) is arranged on the outer side of the reaming bag (13), and an assembled steel plate (15) is arranged below the structural cushion layer (5).
2. The combined foundation pit supporting structure of claim 1, wherein: the front grouting steel pipe pile (6) is obliquely arranged on the inner side of the inner support H-shaped steel (2), and the mounting sheet (7) is fixedly connected with the inner support H-shaped steel (2) through bolts.
3. The combined foundation pit supporting structure of claim 1, wherein: the pipe side grout pressing holes (8) are arranged in the front grouting steel pipe pile (6) at equal angles, and the assembled steel plate (15) is connected with the front grouting steel pipe pile (6) in a welding mode.
4. The combined foundation pit supporting structure of claim 1, wherein: the reinforcing disc (10) is symmetrically arranged relative to the transverse center line of the pipe side grout pressing hole (8), and the outer end of the reinforcing disc (10) is of a saw-toothed structure.
5. The combined foundation pit supporting structure of claim 1, wherein: the longitudinal section of the steel pipe pile head (11) is of a triangular structure, and a pile head grout outlet (12) is formed in the steel pipe pile head (11).
6. The combined foundation pit supporting structure of claim 1, wherein: the reaming bag (13) is fixed on the front grouting steel pipe pile (6) through a hoop (14), and the hoops (14) are arranged on the outer side of the front grouting steel pipe pile (6) at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022295968.5U CN213978971U (en) | 2020-10-15 | 2020-10-15 | Combined foundation pit supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022295968.5U CN213978971U (en) | 2020-10-15 | 2020-10-15 | Combined foundation pit supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213978971U true CN213978971U (en) | 2021-08-17 |
Family
ID=77256438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022295968.5U Active CN213978971U (en) | 2020-10-15 | 2020-10-15 | Combined foundation pit supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213978971U (en) |
-
2020
- 2020-10-15 CN CN202022295968.5U patent/CN213978971U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100585094C (en) | Construction method of circular deep foundation pit support | |
| CN203034467U (en) | Combined steel pile cofferdam with water-proof fore shafts | |
| CN108193642B (en) | Revetment reinforcing facility and construction method thereof | |
| CN102900089A (en) | Combined steel pile cofferdam provided with water swellable waterproof rubber fore shaft | |
| CN102134853A (en) | CT sealed steel pipe pile foundation pit water stop supporting device and construction method thereof | |
| CN208441084U (en) | Coercion underground continuous wall | |
| CN113089683A (en) | Inclined pile supporting structure and construction method | |
| CN213978971U (en) | Combined foundation pit supporting structure | |
| CN210341936U (en) | Assembled vertical supporting structure | |
| CN103410155B (en) | A kind of recyclable preposition assembling braced cuts structure and application process thereof | |
| CN215252932U (en) | Deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system | |
| CN205975551U (en) | A construction platform for construction of aquatic steel sheet pile | |
| CN209958372U (en) | Railway newly-added second-line platform back way foundation pile pipe curtain supporting structure | |
| CN212801549U (en) | H-shaped double-row steel sheet pile supporting structure | |
| CN113653079A (en) | Combined temporary cofferdam for crossing river channel and construction method thereof | |
| CN112160325A (en) | Composite supporting structure for enhancing rigidity of prestressed pipe pile | |
| CN114250744A (en) | Novel ecological combined river slope retaining wall revetment | |
| CN113266013A (en) | Pile end pressure grouting construction process for prestressed concrete pipe pile | |
| CN110985017A (en) | Construction method for penetrating rainwater box culvert under expansive soil stratum shield | |
| CN215925983U (en) | Pile bottom mud jacking cement slurry collecting device | |
| CN220202745U (en) | Grouting reinforcement retaining wall device | |
| CN215669539U (en) | PHC precast tubular pile and steel lattice column combined diagonal brace | |
| CN214883595U (en) | Anti-floating pile structure | |
| CN211368734U (en) | Novel steel structure combined support close to existing building deep foundation pit | |
| CN217517606U (en) | Environment-friendly foundation pit slope soil nailing wall structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |