CN111173004A - Special-shaped precast pile zipper type supporting structure and construction method thereof - Google Patents
Special-shaped precast pile zipper type supporting structure and construction method thereof Download PDFInfo
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- CN111173004A CN111173004A CN202010205944.8A CN202010205944A CN111173004A CN 111173004 A CN111173004 A CN 111173004A CN 202010205944 A CN202010205944 A CN 202010205944A CN 111173004 A CN111173004 A CN 111173004A
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- 238000010276 construction Methods 0.000 title claims abstract description 60
- 239000004567 concrete Substances 0.000 claims abstract description 47
- 230000002787 reinforcement Effects 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 8
- 210000001015 abdomen Anatomy 0.000 claims abstract description 6
- 230000001788 irregular Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 239000011513 prestressed concrete Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000002689 soil Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
- E02D19/185—Joints between sheets constituting the sealing aprons
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
Abstract
The invention discloses a special-shaped precast pile zipper type supporting structure and a construction method thereof. The pile body of the special-shaped precast pile is made of concrete materials, prestress is applied, a reinforcement cage is arranged in the pile body, and the pile belly is in a hollow round shape; the special-shaped precast pile is irregular short T-shaped; the construction method is that the special-shaped precast pile is constructed symmetrically in a staggered way on site; the two staggered special-shaped precast piles are tightly buckled to form a chain type supporting structure; after the buckling construction of the special-shaped precast piles is finished, carrying out small-diameter high-pressure jet-grouting stirring pile construction at the joint of two parallel special-shaped precast piles to form a high-pressure jet-grouting stirring water stopping body so as to plug the parallel gaps of the special-shaped precast piles; the top of the special-shaped precast pile is provided with a concrete crown beam. The invention is particularly suitable for construction environments with narrow and small sites, saves the consumption of concrete and cement of the water-stop mixing pile, can enhance the integrity and the lateral deformation resistance of the foundation pit supporting structure, and has obvious economic and environmental benefits.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a special-shaped precast pile zipper type supporting structure and a construction method thereof.
Background
With the increasing requirements of environmental protection in China, the traditional foundation pit support mode of adopting a slurry retaining wall drilling cast-in-place pile is gradually limited, but building construction in China is vigorously developed, underground space development and utilization are increasingly prosperous, contradictions exist between the development and the utilization, the price of land is increased continuously, the planned basement outer wall is closer and closer to the red line for building, the range of the basement outer wall capable of being used for foundation pit support is smaller and smaller, the occupied space width of a supporting pile and a water stopping pile is at least 3.0m in the conventional foundation pit support mode, and the engineering site cannot meet the occupied space requirements of the supporting pile and the water stopping pile.
There has been chinese utility model patent (application No. 201120407042.9) relating to a prestressed reinforced concrete special-shaped precast pile, the pile type of the concrete precast pile is special-shaped, the center of the concrete precast pile is opened with a center hole, and both ends of the concrete precast pile are provided with steel plate pile caps. The special-shaped precast pile has the advantages that the external surface area is increased, and the vertical friction force and the vertical bearing capacity are greatly improved; meanwhile, the cross section is increased, the bending resistance of the pile body is correspondingly increased, and the bearing capacity of the whole pile body is effectively improved. The following disadvantages still remain: (1) only the vertical bearing compression resistance of the prestressed reinforced concrete special-shaped precast pile is improved, and the horizontal shear resistance of the foundation pit engineering support pile which is horizontally loaded is not enhanced; (2) and a continuous water-stopping system cannot be formed, and the water leakage phenomenon can occur when the water-stopping system is used for foundation pit supporting engineering, so that the safety of a foundation pit is endangered.
In conclusion, a supporting structure and a construction method which can not only retain soil but also stop water and have a small occupied area are urgently needed in foundation pit engineering.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the special-shaped precast pile zipper type supporting structure and the construction method, wherein the special-shaped precast pile zipper type supporting structure has the advantages of higher bending resistance and horizontal shearing resistance, water stopping capability, convenience and rapidness in construction, low engineering cost and small environmental influence, and particularly occupies a small area.
The object of the invention is achieved in that:
a zipper type supporting structure of a special-shaped precast pile is characterized in that a special-shaped precast pile 1 comprises a special-shaped pile end plate 4 and a special-shaped precast pile body; the special-shaped precast pile body is made of concrete materials and is prestressed, a reinforcement cage is arranged in the special-shaped precast pile body, and the special-shaped precast pile belly is in a hollow round shape; the special-shaped precast pile 1 is in an irregular short T shape;
the special-shaped pile end plate 4 is made of a steel plate with the thickness not less than 20mm and the steel grade not lower than Q235B, and the section shape of the special-shaped pile end plate 4 is the same as that of the special-shaped precast pile 1;
the strength grade of the concrete of the pile body of the special-shaped precast pile is C60-C80;
the reinforcement cage reinforcement ratio arranged in the pile body of the special-shaped precast pile is not lower than 0.2%, the stressed longitudinal reinforcement of the reinforcement cage adopts a steel bar 5 for prestressed concrete, and the stirrup adopts a spiral high-strength reinforcement;
the special-shaped precast pile 1 applies prestress according to engineering requirements, wherein the prestress is applied before pile body concrete is poured;
the special-shaped precast pile is characterized in that the pile belly of the special-shaped precast pile is a hollow circle 2, wherein the diameter of the hollow circle 2 is 0.25-0.3 times of the T-shaped long side of the special-shaped precast pile;
the construction method of the special-shaped precast pile zipper type supporting structure comprises the following main construction steps:
the method comprises the following steps: after the special-shaped precast pile is processed and manufactured in a factory, the special-shaped precast pile is transported to an engineering site, a pile sinking machine is in place, and a pile pressing machine and equipment are debugged;
step two: after the pile pressing machine is put in place and debugged, slowly pressing the special-shaped precast piles in sequence in a staggered and symmetrical mode at two sides to form a zipper type supporting structure, and continuously correcting the bidirectional vertical deviation;
step three: when the multi-section special-shaped precast pile is adopted, pile splicing construction is carried out on site;
step four: constructing a small-diameter high-pressure jet-grouting mixing pile 3 at the gap side of two parallel special-shaped precast piles;
step five: arranging a special-shaped precast pile top concrete crown beam 6 and a first concrete inner support 7;
step six: excavating earthwork to a second support elevation, and arranging a concrete purlin 8 and a second concrete inner support 9;
step seven: carrying out subsequent foundation pit engineering construction operation, wherein the subsequent construction of the foundation pit is the same as that of a common foundation pit;
the construction method of the special-shaped precast pile comprises the steps of carrying out staggered symmetrical construction on the special-shaped precast pile on site; the two staggered special-shaped precast piles are tightly buckled to form a chain type supporting structure;
after the buckling construction of the special-shaped precast piles is finished, constructing a small-diameter high-pressure jet-grouting stirring pile 3 at the joint of two parallel special-shaped precast piles to form a high-pressure jet-grouting stirring water stopping body so as to block gaps formed by the parallel special-shaped precast piles;
and a concrete crown beam is arranged at the top of the special-shaped precast pile.
Has the positive and beneficial effects that: the invention has the following effects that 1, the land utilization range of the foundation pit supporting structure is reduced, and the utilization rate of land is greatly developed; no slurry is discharged and no dust is generated in the construction process, so that the requirements of green and environment-friendly buildings are met; 2. the foundation pit supporting engineering has low cost, high construction speed, greatly shortened total construction period and less capital and quick turnover benefits; 3. the construction method is simple and has the condition of wide popularization and application; 4. the special-shaped precast pile has an open-web section, so that concrete is saved; 5. after parallel pile pressing construction, small-diameter high-pressure jet-grouting stirring pile water stopping is carried out in a formed gap, a row of water stopping piles do not need to be arranged, and building materials are saved; 6. the special-shaped precast pile is produced in factories, the quality is controllable, the mass production can be realized, the precast pile can apply prestress, the rigidity of the pile body is further improved, the material performance is fully exerted, and the material is saved.
Drawings
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a schematic perspective view of a special-shaped prefabricated support pile;
FIG. 4 is a schematic view of an end plate of the special-shaped prefabricated supporting pile;
FIG. 5 is a schematic cross-sectional view of a foundation pit supporting structure of the present invention;
in the figure, the following steps are carried out: the special-shaped precast supporting pile comprises a special-shaped precast supporting pile 1, a special-shaped precast supporting pile central circle 2, a small-diameter high-pressure rotary spraying stirring pile 3, a pile end plate 4, a steel bar 5 for prestressed concrete, a pile top crown beam 6, a first concrete inner support 7, a concrete purlin 8 and a second concrete inner support 9.
Detailed Description
The invention is further described with reference to the following drawings and specific embodiments:
as shown in fig. 1-5, a special-shaped precast pile zipper type supporting structure, wherein a special-shaped precast pile 1 comprises a special-shaped pile end plate 4 and a special-shaped precast pile body; the special-shaped precast pile body is made of concrete materials and is prestressed, a reinforcement cage is arranged in the special-shaped precast pile body, and the special-shaped precast pile belly is in a hollow round shape; the special-shaped precast pile 1 is in an irregular short T shape;
the special-shaped pile end plate 4 is made of a steel plate with the thickness not less than 20mm and the steel grade not lower than Q235B, and the section shape of the special-shaped pile end plate 4 is the same as that of the special-shaped precast pile 1;
the strength grade of the concrete of the pile body of the special-shaped precast pile is C60-C80;
the reinforcement cage reinforcement ratio arranged in the pile body of the special-shaped precast pile is not lower than 0.2%, the stressed longitudinal reinforcement of the reinforcement cage adopts a steel bar 5 for prestressed concrete, and the stirrup adopts a spiral high-strength reinforcement;
the special-shaped precast pile 1 applies prestress according to engineering requirements, wherein the prestress is applied before pile body concrete is poured;
the special-shaped precast pile is characterized in that the pile belly of the special-shaped precast pile is a hollow circle 2, wherein the diameter of the hollow circle 2 is 0.25-0.3 times of the T-shaped long side of the special-shaped precast pile;
the construction method of the special-shaped precast pile zipper type supporting structure comprises the following main construction steps:
the method comprises the following steps: after the special-shaped precast pile is processed and manufactured in a factory, the special-shaped precast pile is transported to an engineering site, a pile sinking machine is in place, and a pile pressing machine and equipment are debugged;
step two: after the pile pressing machine is put in place and debugged, slowly pressing the special-shaped precast piles in sequence in a staggered and symmetrical mode at two sides to form a zipper type supporting structure, and continuously correcting the bidirectional vertical deviation;
step three: when the multi-section special-shaped precast pile is adopted, pile splicing construction is carried out on site;
step four: constructing a small-diameter high-pressure jet-grouting mixing pile 3 at the gap side of two parallel special-shaped precast piles;
step five: arranging a special-shaped precast pile top concrete crown beam 6 and a first concrete inner support 7;
step six: excavating earthwork to a second support elevation, and arranging a concrete purlin 8 and a second concrete inner support 9;
step seven: carrying out subsequent foundation pit engineering construction operation, wherein the subsequent construction of the foundation pit is the same as that of a common foundation pit;
the construction method of the special-shaped precast pile comprises the steps of carrying out staggered symmetrical construction on the special-shaped precast pile on site; the two staggered special-shaped precast piles are tightly buckled to form a chain type supporting structure;
after the buckling construction of the special-shaped precast piles is finished, constructing a small-diameter high-pressure jet-grouting stirring pile 3 at the joint of two parallel special-shaped precast piles to form a high-pressure jet-grouting stirring water stopping body so as to block gaps formed by the parallel special-shaped precast piles;
and a concrete crown beam is arranged at the top of the special-shaped precast pile.
Example 1
As shown in fig. 1 to 5, the special-shaped precast pile zipper type supporting structure mainly comprises special-shaped precast supporting piles 1 which are parallelly staggered and symmetrically constructed; after two rows of special-shaped prefabricated support piles constructed in parallel are constructed in a staggered and symmetrical mode, a zipper type row pile supporting structure is formed. And (3) constructing a high-pressure jet-grouting mixing pile 3 at a seam formed by two special-shaped precast piles constructed in parallel, plugging the seam, and then arranging a concrete crown beam 5 to form a whole supporting system.
In the embodiment, the special-shaped precast pile 1 is a concrete precast pile, the concrete strength grade of the pile body of the special-shaped precast pile is C60-C80, the side length of a long side is 1200mm, the side length of a short side is 300mm, and the height of a short T is 550 mm. The pile body of the special-shaped precast pile is hollow, wherein the hollow is a hollow round 2 with the diameter of 300 mm; the steel bar 5 for prestressed concrete arranged in the pile body of the special-shaped prefabricated support pile 1 adopts a model with the tensile strength not less than 1420MPa and the diameter of 12.6 mm.
If pile splicing is needed in the construction process, two special-shaped prefabricated support piles are welded together through the pile end steel end plates 4, pile sinking is integrally constructed, the thickness of the steel end plates is 20mm, the strength grade is Q235B grade, and the outer section of each special-shaped prefabricated support pile is the same as that of each special-shaped prefabricated support pile.
The invention relates to a buckling type inner grouting special-shaped prefabricated support pile and a construction method thereof, which comprises the following steps:
the first step is as follows: after the special-shaped prefabricated support pile is produced in a factory, the special-shaped prefabricated support pile is transported to an engineering site, a pile pressing machine is in place, pile testing is firstly carried out according to design requirements so as to determine technical indexes such as pile pressing speed, maximum pressure value and the like, and pile pressing machine equipment, construction technology and technical measures are checked;
the second step is that: when the pile driver is in place, the platform supporting leg jacking oil cylinder correction platform is started to be in a horizontal state. When the pile is buried to 50cm, the verticality of the pile and the levelness of the platform are righted in a walking mode, and the vertical and horizontal bidirectional vertical deviation of the pile is not more than 0.5%. After stabilization, the special-shaped prefabricated support piles are gradually pressed down one by one in a buckling mode, and bidirectional vertical deviation is continuously corrected;
the third step: when the multi-section special-shaped prefabricated support pile is adopted, the pile head of the pile section entering the soil is higher than the ground by 0.5-1.0 m; the upper pile and the lower pile are kept straight when the piles are connected, and the dislocation deviation is not more than 2 mm. Before welding, the end plates of the two sections of piles are cleaned by a steel brush until the grooves are exposed with metallic luster, so that the upper section of pile is ensured to be vertical and then welded. Two welders carry out simultaneously during welding, firstly, spot welding is carried out on the circumference of the groove at 4-6 points symmetrically, welding is not less than 2 layers and 3 layers, welding slag on each layer must be cleaned up, the welding seam is ensured to be full continuously, and natural cooling is carried out for about 8-10 min.
The fourth step: and performing high-pressure rotary spraying stirring construction at a gap formed by parallel construction of every two special-shaped precast piles. The construction of the high-pressure rotary jet grouting pile adopts a triple pipe method. Air pressure not less than 0.7MPa, cementThe grout pressure is preferably more than 25MPa, and the grout pressure is not less than 3.0MPa, or determined by construction units according to field tests. The jet grouting lifting speed is 15-25 cm/min, and the flow rate of cement slurry is greater than 30L/min. When the grouting pipe is placed into the drill hole, the nozzle reaches the designed elevation, and then grouting can be sprayed. And after the jet grouting parameters reach specified values, lifting the grouting pipe according to the process requirements of the jet grouting pile, and jet grouting from bottom to top. The rotating speed of the drill rod in the lifting process is 15-20 r/min, the overlap length of the grouting pipe in sectional lifting is preferably larger than 100mm, and the high-pressure jet grouting pile is made of P.O.42.5-grade ordinary portland cement. The total dosage of the cement and the fly ash is 550kg/m3Cement, fly ash =1:0.3, and the water-cement ratio of cement slurry is 0.8;
the fifth step: after the high-pressure jet grouting mixing pile is constructed, excavating a foundation pit, unloading soil to the bottom elevations of the concrete crown beam (6) and the first concrete inner support (7), binding reinforcing steel bars, and pouring the concrete crown beam (6) and the first concrete inner support (7);
and a sixth step: and after the strength of the special-shaped precast pile top concrete crown beam (6) and the strength of the first concrete inner support (7) reach 80% of the design strength, continuously excavating the foundation pit downwards in a layered and zoned symmetrical manner. Until the concrete is excavated to the bottoms of the concrete purlin (8) and the second concrete inner support (9); meanwhile, uninterruptedly observing the water seepage condition of the splicing seam of the special-shaped prefabricated support pile;
the seventh step: the subsequent construction of the foundation pit engineering is the same as the construction method of the common foundation pit.
The invention has the following effects that 1, the land utilization range of the foundation pit supporting structure is reduced, and the utilization rate of land is greatly developed; no slurry is discharged and no dust is generated in the construction process, so that the requirements of green and environment-friendly buildings are met; 2. the foundation pit supporting engineering has low cost, high construction speed, greatly shortened total construction period and less capital and quick turnover benefits; 3. the construction method is simple and has the condition of wide popularization and application; 4. the special-shaped precast pile has an open-web section, so that concrete is saved; 5. after parallel pile pressing construction, small-diameter high-pressure jet-grouting stirring pile water stopping is carried out in a formed gap, a row of water stopping piles do not need to be arranged, and building materials are saved; 6. the special-shaped precast pile is produced in factories, the quality is controllable, the mass production can be realized, the precast pile can apply prestress, the rigidity of the pile body is further improved, the material performance is fully exerted, and the material is saved.
The above description is only a preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a special-shaped precast pile zip fastener formula supporting construction which characterized in that: the special-shaped precast pile (1) comprises a special-shaped pile end plate (4) and a special-shaped precast pile body; the special-shaped precast pile body is made of concrete materials and is prestressed, a reinforcement cage is arranged in the special-shaped precast pile body, and the special-shaped precast pile belly is in a hollow round shape; the special-shaped precast pile (1) is irregular short T-shaped.
2. The special-shaped precast pile zipper type supporting structure as claimed in claim 1, wherein: the special-shaped pile end plate (4) is a steel plate with the thickness not less than 20mm and the steel grade not less than Q235B grade, and the section shape of the special-shaped pile end plate (4) is the same as the cross section of the special-shaped precast pile (1).
3. The special-shaped precast pile zipper type supporting structure as claimed in claim 1, wherein: the strength grade of the concrete of the pile body of the special-shaped precast pile is C60-C80.
4. The special-shaped precast pile zipper type supporting structure as claimed in claim 1, wherein: the reinforcement cage reinforcement ratio of the special-shaped precast pile body is not lower than 0.2%, the reinforcement cage stressed longitudinal bars are steel bars (5) for prestressed concrete, and the stirrups are spiral high-strength steel bars.
5. The special-shaped precast pile zipper type supporting structure as claimed in claim 1, wherein: the special-shaped precast pile (1) is prestressed according to engineering requirements, wherein the prestress is applied before the concrete of the pile body is poured.
6. The special-shaped precast pile zipper type supporting structure as claimed in claim 1, wherein: the special-shaped precast pile is characterized in that the pile web is a hollow circle (2), wherein the diameter of the hollow circle (2) is 0.25-0.3 times of the T-shaped long edge of the special-shaped precast pile.
7. The construction method of the special-shaped precast pile zipper type supporting structure as claimed in claim 1, wherein: the method comprises the following main construction steps:
the method comprises the following steps: after the special-shaped precast pile is processed and manufactured in a factory, the special-shaped precast pile is transported to an engineering site, a pile sinking machine is in place, and a pile pressing machine and equipment are debugged;
step two: after the pile pressing machine is put in place and debugged, slowly pressing the special-shaped precast piles in sequence in a staggered and symmetrical mode at two sides to form a zipper type supporting structure, and continuously correcting the bidirectional vertical deviation;
step three: when the multi-section special-shaped precast pile is adopted, pile splicing construction is carried out on site;
step four: constructing a small-diameter high-pressure rotary spraying stirring pile (3) at the gap of two parallel special-shaped precast piles;
step five: arranging a special-shaped precast pile top concrete crown beam (6) and a first concrete inner support (7);
step six: excavating earthwork to a second support elevation, and arranging a concrete purlin (8) and a second concrete inner support (9);
step seven: and carrying out subsequent foundation pit engineering construction operation, wherein the subsequent construction of the foundation pit is the same as the construction method of the common foundation pit.
8. The construction method of the special-shaped precast pile zipper type supporting structure according to claim 7, characterized in that: the construction method of the special-shaped precast pile comprises the steps of carrying out staggered symmetrical construction on the special-shaped precast pile on site; the two staggered special-shaped precast piles are tightly buckled to form a chain type supporting structure.
9. The construction method of the special-shaped precast pile zipper type supporting structure according to claim 1, characterized in that: after the buckling construction of the special-shaped precast piles is finished, the small-diameter high-pressure jet-grouting stirring pile 3 construction is carried out at the joint of the two parallel special-shaped precast piles to form a high-pressure jet-grouting stirring water stopping body so as to plug the parallel gaps of the special-shaped precast piles.
10. The construction method of the special-shaped precast pile zipper type supporting structure according to claim 1, characterized in that: and a concrete crown beam is arranged at the top of the special-shaped precast pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010205944.8A CN111173004A (en) | 2020-03-23 | 2020-03-23 | Special-shaped precast pile zipper type supporting structure and construction method thereof |
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| CN202010205944.8A CN111173004A (en) | 2020-03-23 | 2020-03-23 | Special-shaped precast pile zipper type supporting structure and construction method thereof |
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| CN111173004A true CN111173004A (en) | 2020-05-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195947A (en) * | 2020-09-09 | 2021-01-08 | 万金山 | Preparation process of self-plugging impervious curtain type concrete precast pile |
| CN112873527A (en) * | 2021-02-06 | 2021-06-01 | 广东三和管桩股份有限公司 | Manufacturing mold and method for supporting pile |
| CN112921960A (en) * | 2021-02-06 | 2021-06-08 | 广东三和管桩股份有限公司 | Supporting pile, foundation pit retaining wall, pile splicing structure, guide frame and construction method of guide frame |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200362565Y1 (en) * | 2004-06-21 | 2004-09-21 | 이순호 | Earth Retaining Wall Structure Using Precast Concrete Pile and Construction Method Thereof |
| CN107034894A (en) * | 2017-03-21 | 2017-08-11 | 杭州钜力锚杆科技有限公司 | Post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile and preparation method thereof and construction method |
| CN107326912A (en) * | 2017-08-29 | 2017-11-07 | 南京市测绘勘察研究院股份有限公司 | The special-shaped prefabricated support pile of slip casting and construction method in a kind of button type |
| CN207944461U (en) * | 2017-10-31 | 2018-10-09 | 中国建筑股份有限公司 | A kind of closed foundation pit system and its construction casing |
| CN109972630A (en) * | 2019-02-24 | 2019-07-05 | 王琪 | A kind of foundation pit enclosure structure and its construction method of the assembly of PC component |
| CN211948466U (en) * | 2020-03-23 | 2020-11-17 | 南京市测绘勘察研究院股份有限公司 | Special-shaped precast pile zipper type supporting structure |
-
2020
- 2020-03-23 CN CN202010205944.8A patent/CN111173004A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200362565Y1 (en) * | 2004-06-21 | 2004-09-21 | 이순호 | Earth Retaining Wall Structure Using Precast Concrete Pile and Construction Method Thereof |
| CN107034894A (en) * | 2017-03-21 | 2017-08-11 | 杭州钜力锚杆科技有限公司 | Post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile and preparation method thereof and construction method |
| CN107326912A (en) * | 2017-08-29 | 2017-11-07 | 南京市测绘勘察研究院股份有限公司 | The special-shaped prefabricated support pile of slip casting and construction method in a kind of button type |
| CN207944461U (en) * | 2017-10-31 | 2018-10-09 | 中国建筑股份有限公司 | A kind of closed foundation pit system and its construction casing |
| CN109972630A (en) * | 2019-02-24 | 2019-07-05 | 王琪 | A kind of foundation pit enclosure structure and its construction method of the assembly of PC component |
| CN211948466U (en) * | 2020-03-23 | 2020-11-17 | 南京市测绘勘察研究院股份有限公司 | Special-shaped precast pile zipper type supporting structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195947A (en) * | 2020-09-09 | 2021-01-08 | 万金山 | Preparation process of self-plugging impervious curtain type concrete precast pile |
| CN112873527A (en) * | 2021-02-06 | 2021-06-01 | 广东三和管桩股份有限公司 | Manufacturing mold and method for supporting pile |
| CN112921960A (en) * | 2021-02-06 | 2021-06-08 | 广东三和管桩股份有限公司 | Supporting pile, foundation pit retaining wall, pile splicing structure, guide frame and construction method of guide frame |
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