CN111636417A - Grouting type steel pipe pile and construction method thereof - Google Patents
Grouting type steel pipe pile and construction method thereof Download PDFInfo
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- CN111636417A CN111636417A CN202010408684.4A CN202010408684A CN111636417A CN 111636417 A CN111636417 A CN 111636417A CN 202010408684 A CN202010408684 A CN 202010408684A CN 111636417 A CN111636417 A CN 111636417A
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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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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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
- E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/18—Placing by vibrating
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- General Engineering & Computer Science (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to a grouting type steel pipe pile and a construction method thereof, relating to the technical field of steel pipe pile construction and solving the problems of higher pile forming difficulty and poor adaptability of the traditional down-the-hole hammer construction of a steel pipe pile, wherein the grouting type steel pipe pile comprises a steel pipe pile body formed by steel pipes, cement paste and gravels are fixed inside the steel pipe pile body and around the steel pipe pile, and the grouting type steel pipe pile comprises the following steps: s1, mounting a back cover steel plate; s2, opening holes; s3, driving the steel pipe pile; s4, primary grouting; s5, throwing the broken stones; s6, secondary grouting; s7: and welding the crown beam. The cement paste is uniformly injected into soil layers around the pile body through the pile body grout outlet holes, the bearing capacity of a foundation can be rapidly and effectively improved, the steel pipe is placed downwards in a vibration hammering mode through the vibration hammer, the frictional resistance of the soil bodies around the pile is reduced, the aim of sinking the steel pipe pile is fulfilled, the limitation of a down-the-hole hammer construction method caused by a special stratum is effectively overcome, the construction mode is simple, the safety, the economy, the applicability and the high efficiency of construction are ensured, and the method is environment-friendly and reliable.
Description
Technical Field
The invention relates to the technical field of steel pipe pile construction, in particular to a grouting type steel pipe pile and a construction method thereof.
Background
The steel pipe pile has the advantages of light dead weight, high strength, strong horizontal load resistance, convenient construction and the like, and is widely applied to the foundation pit construction of the building engineering. In particular, when used as a support pile, the steel can be sufficiently driven into a relatively hard bearing layer, and therefore, the bearing effect of the entire section strength of the steel can be exerted.
In the traditional construction method, the steel pipe pile is driven by a down-the-hole hammer to realize the forming of the steel pipe pile, because the diameter of the steel pipe pile is small, the surface area of the periphery of the pile is small, under the condition of complex terrain, particularly in soil layers which mainly comprise sandy soil and round gravel or are buried in shallow underground water, because the soil-squeezing friction resistance of the steel pipe pile and the sandy soil is small, the lateral friction force and the end bearing force of the unit length are small, the pile-forming difficulty is high, the construction efficiency is low, the condition that the pile cannot be formed or the bearing capacity of the steel pipe pile cannot reach the designed value can also occur, the vertical bearing capacity of a single steel pipe pile is limited, and finally the pile-forming failure is caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a grouting type steel pipe pile capable of effectively improving the bearing capacity of the pile end.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a slip casting shaped steel tubular pile, includes the steel-pipe pile body, the steel-pipe pile body is including setting up in the downthehole hollow steel pipe of stake, the bottom mounting of steel pipe has the back cover steel sheet, a plurality of grout outlet have been seted up to steel pipe week side, a plurality of grout holes have been seted up to the back cover steel sheet, inside the steel pipe and the steel pipe with all pour in the clearance between the stake hole and build the body.
Through adopting above-mentioned technical scheme, utilize the steel pipe to form main braced frame, pour through the clearance between inside and steel pipe and the stake hole at the steel pipe and form the body of pouring to form the steel-pipe pile body, connect in stake surrounding soil layer through the body of pouring, consolidate the stake surrounding soil layer, make stake surrounding soil body stability higher, thereby improve pile foundation bearing capacity, be applicable to multiple construction environment, strong adaptability.
The present invention in a preferred example may be further configured to: the casting body comprises broken stones and cement paste.
Through adopting above-mentioned technical scheme, utilize rubble and grout to constitute the slip casting jointly and fill to inside the steel pipe, simple structure is stable, and the construction of being convenient for can improve the ground bearing capacity fast effectively through the even peripheral soil layer of injection pile body in pile body grout outlet with grout, and then improves the effect of pile foundation bearing capacity, the holistic structural strength of guarantee steel-pipe pile body.
The present invention in a preferred example may be further configured to: and the pile top of the steel pipe pile body is fixedly connected with a crown beam.
By adopting the technical scheme, the integral stress of the steel pipe pile body is strengthened by the crown beam, and the vertical shear resistance of the steel pipe pile body is strengthened.
Aiming at the defects in the prior art, one of the purposes of the invention is to provide a construction method of a grouting type steel pipe pile, which can be used for quickly and effectively driving a steel pipe pile in a complex terrain, has strong applicability and high construction efficiency, and comprises the following steps:
s1, mounting a back cover steel plate to the bottom end of the steel pipe;
s2, opening holes, namely, forming slurry outlet holes on the peripheral sides of the steel pipes and forming slurry seepage holes on the bottom sealing steel plate;
s3, driving the steel pipe pile, driving the steel pipe into the soil body in a vibration driving mode, and cleaning residual soil inside and outside the steel pipe;
s4, primary grouting, namely, putting broken stone into the steel pipe, pouring cement paste into the steel pipe after the putting is finished, and stopping grouting until grout returns around the top of the steel pipe;
s5, throwing the broken stones, continuously throwing the broken stones into the steel pipe and the steel pipe, and vibrating and striking the steel pipe;
s6, secondary grouting, namely observing the liquid level height of cement paste inside and outside the steel pipe after grouting is finished, and performing grout filling at the pipe orifice of the steel pipe to form a steel pipe pile body;
s7: and welding a crown beam, wherein the crown beam is welded at the top end of the steel pipe pile body.
By adopting the technical scheme, the steel pipe is placed downwards in a vibration driving mode, the steel pipe pile sinking device has strong applicability to special strata and water-containing strata, meanwhile, the friction resistance with soil bodies around the pile in the pile sinking process of the steel pipe pile is reduced by forcing vibration to the steel pipe pile, the pile sinking efficiency is higher, the construction period is saved, the environment is protected, the manufacturing cost is low, and the comprehensive economic benefit is high.
The present invention in a preferred example may be further configured to: in steps S3 and S5, the steel pipe is vibrated by the vibration hammer.
By adopting the technical scheme, the limit of the special bottom layer on the down-the-hole hammer construction method is effectively overcome by the vibration hammer, the down-the-hole hammer is suitable for overwater operation, the construction safety, the construction economy, the construction applicability and the construction efficiency can be ensured, the down-the-hole hammer is safe and reliable, and the resource waste is reduced.
The present invention in a preferred example may be further configured to: in the step S4 and the step S6, the crushed stone is crushed stone with the grain diameter of 5-10 mm.
Through adopting above-mentioned technical scheme, 5~10 mm's rubble can reduce the card in the inside condition of steel pipe, and the effect of the mixed connection of while with cement is better.
The present invention in a preferred example may be further configured to: in the steps S4 and S6, the time interval between the primary grouting and the secondary grouting is 50-60 min.
By adopting the technical scheme, the cement paste for primary grouting still keeps a flowing state in 50-60 min, and the cement paste for secondary grouting can be better fused with the cement paste for primary grouting, so that the steel pipe pile construction effect is better, and the structure is more stable.
The present invention in a preferred example may be further configured to: grouting is performed using a grouting pipe, and the grouting pipe is moved up and down during the input of crushed stones in step S5.
By adopting the technical scheme, the cement slurry is fully injected into the steel pipe, the condition of leakage injection is reduced, the connection performance of broken stones is better, and the integral structural strength of the steel pipe pile body is enhanced.
The present invention in a preferred example may be further configured to: the bottom sealing steel plate is a round steel plate or a square steel plate.
By adopting the technical scheme, the round steel plate is convenient for workers to be better matched with the bottom of the steel pipe, and is convenient for on-site quick installation and connection; the square steel plate is convenient for after the pouring body is poured, the corners of the square steel plate are connected with the pouring body, the connecting force of the steel pipe and the pouring body is further enhanced, and the overall anti-pulling capacity of the steel pipe pile is enhanced.
The present invention in a preferred example may be further configured to: one side of the bottom sealing steel plate, which is far away from the steel pipe, is connected with a connecting rib plate.
Through adopting above-mentioned technical scheme, when sinking the steel pipe, the connecting rib board plays reaming effect at the steel pipe bottom in the same place as the drill bit, simultaneously through pouring behind the formation casting body, utilizes connecting rib board and the connection of casting the body, has improved the holistic resistance to plucking ability of steel-pipe pile.
In summary, the present invention includes at least one of the following advantages:
1. the steel pipe and the grouting body are utilized to form the steel pipe pile body together, and compared with the traditional steel pipe pile, the steel pipe pile has stronger bearing capacity;
2. when the steel pipe is sunk, the steel pipe is driven by using the vibration hammer, and the friction resistance between soil bodies around the pile is reduced by forcibly vibrating the steel pipe pile, so that the aim of sinking the steel pipe pile is fulfilled;
3. broken stones are put into the steel pipe and the gap between the steel pipe and the pile hole, cement paste is poured, and the broken stones and the cement paste are connected with the soil layer around the pile to reinforce the soil layer around the pile, so that the soil body around the pile is higher in stability, the bearing capacity of the pile foundation is improved, the pile foundation is suitable for various construction environments, and the adaptability is high;
4. through offer out the thick liquid hole and ooze the thick liquid hole on steel-pipe pile pipe wall and tube bottom back cover steel sheet, the slip casting in-process, the grout in the steel-pipe of being convenient for passes through out the thick liquid hole and oozes the even injection pile body week side in thick liquid hole, easy operation saves the time limit for a project.
Drawings
FIG. 1 is a schematic structural view of a steel pipe pile body according to the present invention;
FIG. 2 is a first schematic structural diagram of a steel pipe and a bottom-sealing steel plate according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram II of the steel pipe and the bottom-sealed steel plate in the first embodiment of the present invention;
FIG. 4 is a schematic structural view of a steel pipe, a crown beam and a gusset plate according to the present invention;
FIG. 5 is a flow chart of the construction process of the present invention;
FIG. 6 is a schematic structural diagram of a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a third embodiment of the present invention.
Reference numerals: 1. a steel pipe pile body; 2. a steel pipe; 3. a bottom sealing steel plate; 4. a slurry outlet; 5. grouting holes; 6. pouring a building body; 7. a crown beam; 8. connecting rib plates; 9. a batten plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the grouting type steel pipe pile disclosed by the invention comprises a steel pipe pile body 1 of the steel pipe pile body, wherein the steel pipe pile body 1 of the steel pipe pile body comprises a hollow steel pipe 2 arranged in a pile hole, the steel pipe 2 is composed of straight seam steel pipes 2 with the diameter of 150mm, a bottom sealing steel plate 3 is fixed at the bottom end of the steel pipe 2, the bottom sealing steel plate 3 is a circular steel plate and has the same area as the cross section of the steel pipe 2, and the steel pipe 2 and the bottom sealing steel plate 3 are coaxially arranged. The main support frame is formed by steel pipes 2 and a back cover steel plate 3.
Casting bodies 6 are poured inside the steel pipes 2 and in gaps between the steel pipes 2 and pile holes, the casting bodies 6 comprise broken stones and cement paste, and the broken stones are broken stones with the particle size of 5-10 mm. Utilize rubble and grout to constitute jointly and pour body 6 and pour to steel pipe 2 in and pile hole, simple structure is stable, and the grout and the rubble of 2 week sides of steel pipe and the connection of soil layer around the pile body consolidate the soil layer all around for pile soil body stability is higher, and 5~10 mm's rubble can reduce the card and the inside condition of steel pipe 2, and the effect of the mixed connection of while and cement is better.
A plurality of grout outlet holes 4 are formed in the peripheral side of the steel pipe 2, and a plurality of grout permeating holes 5 are formed in the bottom sealing steel plate 3. In the work progress, through grout outlet 4 and ooze the grout hole 5 and guide the grout in the steel pipe 2 and evenly pour into the peripheral soil layer of pile body, can improve the foundation bearing capacity fast effectively, and then improve the effect of pile foundation bearing capacity, the construction of being convenient for, safety ring protects.
The top fixedly connected with of steel-pipe pile body 1 of hat roof beam 7, hat roof beam 7 adopt 22# B type I steel, fixedly connected with lacing plate 9 between the adjacent hat roof beam 7, hat roof beam 7 and lacing plate 9 all extend along steel-pipe pile body 1's radial direction and set up, and support hat roof beam 7 and lacing plate 9 mutually perpendicular setting. The integral stress of the steel pipe pile body 1 of the steel pipe pile body is enhanced by the crown beam 7 and the gusset plate 9, and the integral stress and the vertical shear resistance of the steel pipe pile body 1 of the steel pipe pile body are enhanced.
A construction method of a grouting type steel pipe pile comprises the following steps:
s1, mounting a back cover steel plate 3, preparing a steel pipe 2 for forming the steel pipe pile body 1 of the steel pipe pile body, and mounting the back cover steel plate 3 to the bottom end of the steel pipe 2 in a construction site;
s2, opening holes, namely, forming slurry outlet holes 4 on the peripheral side of the steel pipe 2 and forming slurry seepage holes 5 on the bottom sealing steel plate 3;
s3, driving the steel pipe 2 pile, driving the steel pipe 2 into a soil body by adopting a vibration hammer vibration driving mode, and cleaning residual soil inside and outside the steel pipe 2; the residual soil in the pile hole is cleaned by starting the down-the-hole hammer, so that the residual soil amount mixed into the grouting body is reduced, and the integral structural stability of the grouting body is higher.
S4, grouting for the first time, manually throwing broken stones into the steel pipe 2 in the pile hole, putting a grouting pipe of a grouting machine into the steel pipe 2 and extending to the bottom of the pile hole, guiding cement paste to be injected into the steel pipe 2 through grouting body, and stopping grouting until grout returns around the top of the steel pipe 2;
s5: throwing the broken stones, continuously throwing the broken stones into the steel pipe 2 and the outside of the steel pipe 2 in the grouting process of S4, moving the grouting pipe up and down, and vibrating and striking the steel pipe 2; the up-and-down moving grouting pipe can ensure that cement slurry is filled in the steel pipe 2, the condition of leaking injection is reduced, the connection performance of broken stones is better, and the integral structural strength of the steel pipe pile body 1 of the steel pipe pile body is enhanced.
S6, secondary grouting, namely observing the liquid level height of cement paste inside and outside the steel pipe 2 after grouting is finished, and performing grout supplementation at the pipe orifice of the steel pipe 2 to form a steel pipe pile body 1 of the steel pipe pile body;
s7: and welding a crown beam 7, and welding the crown beam 7 at the top end of the steel pipe pile body 1 of the steel pipe pile body.
In steps S3 and S5, the steel pipe 2 is vibrated by the vibration hammer. The vibrating hammer effectively overcomes the limitation of a special bottom layer on the down-the-hole hammer construction method, is suitable for overwater operation, can ensure the safety, the economy, the applicability and the high efficiency of construction, is safe and reliable, reduces the resource waste,
in the steps S4 and S6, the time interval between the primary grouting and the secondary grouting is 50-60 min. The cement paste of primary grouting still keeps the mobile state 50-60 min, and the cement paste of guarantee secondary grouting can be better fuses with the cement paste of primary grouting for 2 piles of steel pipe construction effect is better, and the structure is more stable.
The implementation principle and the effect of the embodiment are as follows:
the invention adopts a slip casting type steel pipe 2 pile, cement paste and gravels are poured inside the steel pipe 2 and around the steel pipe 2 pile, the cement paste and the gravels are connected with soil around the steel pipe 2 pile, and the bearing capacity of the foundation around the pile is enhanced, so that the integral bearing capacity of the pile foundation is improved.
Example two
The difference from the first embodiment is that:
the bottom sealing steel plate 3 is a square steel plate, and the outer diameter circle of the steel pipe 2 is the inscribed circle of the square steel plate.
The implementation principle and the effect of the embodiment are as follows:
the square steel plate is adopted, so that after the casting body 6 is poured, the corners of the square steel plate are connected with the casting body 6, the connecting force of the steel pipe 2 and the casting body 6 is further enhanced, and the overall uplift resistance of the steel pipe 2 pile is enhanced.
EXAMPLE III
The difference from the second embodiment is that:
one side fixedly connected with connection ribbed slab 8 that the steel pipe 2 was kept away from to back cover steel sheet 3, connection ribbed slab 8 is preferably four, and is in four edges and corners of back cover steel sheet 3 respectively.
The implementation principle and the effect of the embodiment are as follows:
when the steel pipe 2 is sunk, the connecting rib plates 8 play a role in reaming at the bottom of the steel pipe 2 equivalent to a drill bit, and meanwhile, after the casting body 6 is formed by casting, the connecting rib plates 8 are connected with the casting body 6, so that the overall uplift resistance of the steel pipe 2 pile is improved.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The grouting type steel pipe pile comprises a steel pipe pile body (1), and is characterized in that the steel pipe pile body (1) comprises a hollow steel pipe (2) arranged in a pile hole, a bottom sealing steel plate (3) is fixed at the bottom end of the steel pipe (2), a plurality of grout outlet holes (4) are formed in the periphery of the steel pipe (2), a plurality of grout seepage holes (5) are formed in the bottom sealing steel plate (3), and pouring bodies (6) are poured inside the steel pipe (2) and in gaps between the steel pipe (2) and the pile hole.
2. A grouting type steel pipe pile according to claim 1, characterized in that the casting body (6) comprises crushed stone and cement paste.
3. The grouting type steel pipe pile of claim 1, wherein a crown beam (7) is fixedly connected to the pile top of the steel pipe pile body (1).
4. The construction method of the grouting type steel pipe pile is characterized by comprising the following steps of:
s1, mounting the back cover steel plate (3), and mounting the back cover steel plate (3) to the bottom end of the steel pipe (2);
s2, opening holes, forming slurry outlet holes (4) on the peripheral side of the steel pipe (2), and forming slurry seepage holes (5) on the bottom sealing steel plate (3);
s3, driving the steel pipe (2) pile, driving the steel pipe (2) into a soil body in a vibration driving mode, and cleaning residual soil inside and outside the steel pipe (2) at the same time;
s4, primary grouting, namely, throwing the broken stone into the steel pipe (2), pouring cement slurry into the steel pipe (2) after the throwing is finished, and stopping grouting until slurry return appears around the top of the steel pipe (2);
s5, throwing the broken stones, continuously throwing the broken stones into the steel pipe (2) and vibrating the steel pipe (2) simultaneously;
s6, secondary grouting, namely observing the liquid level height of cement paste inside and outside the steel pipe (2) after the grouting is finished, and performing grout supplementing at the pipe orifice of the steel pipe (2) to form a steel pipe pile body (1) of the steel pipe pile body;
s7: and welding a crown beam (7), and welding the crown beam (7) at the top end of the steel pipe pile body (1) of the steel pipe pile body.
5. The construction method of a grouting type steel pipe pile according to claim 4, wherein the steel pipe (2) is vibrated by a vibration hammer in steps S3 and S5.
6. The construction method of a grouting type steel pipe pile according to claim 4, wherein in the step S4 and the step S6, the crushed stone with a particle size of 5-10 mm is adopted.
7. The construction method of a grouting type steel pipe pile according to claim 4, wherein in the steps S4 and S6, the time interval between the primary grouting and the secondary grouting is 50-60 min.
8. The construction method of a grouting type steel pipe pile according to claim 4, wherein grouting is performed using a grouting pipe, and the grouting pipe is moved up and down during the process of putting crushed stones in step S5.
9. The grouting type steel pipe pile of claim 1, wherein the bottom sealing steel plate (3) is a round steel plate or a square steel plate.
10. The grouting type steel pipe pile of claim 9, wherein a connecting rib plate (8) is connected to one side of the bottom-sealed steel plate (3) far away from the steel pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010408684.4A CN111636417A (en) | 2020-05-14 | 2020-05-14 | Grouting type steel pipe pile and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010408684.4A CN111636417A (en) | 2020-05-14 | 2020-05-14 | Grouting type steel pipe pile and construction method thereof |
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| CN111636417A true CN111636417A (en) | 2020-09-08 |
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| CN202010408684.4A Pending CN111636417A (en) | 2020-05-14 | 2020-05-14 | Grouting type steel pipe pile and construction method thereof |
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| CN112343037A (en) * | 2020-11-16 | 2021-02-09 | 安徽华盛国际建筑设计工程咨询有限公司 | Construction method of composite foundation |
| CN112376548A (en) * | 2020-09-21 | 2021-02-19 | 海洋石油工程股份有限公司 | Resistance device for steel pipe pile |
| CN114808943A (en) * | 2022-04-07 | 2022-07-29 | 山东省公路桥梁建设集团有限公司 | Grouting construction process for micro steel pipe |
| CN115012405A (en) * | 2022-07-20 | 2022-09-06 | 中建八局第二建设有限公司 | Foundation pit supporting method for grouting of perforated pipe pile in stone-nitre area |
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| CN115012405A (en) * | 2022-07-20 | 2022-09-06 | 中建八局第二建设有限公司 | Foundation pit supporting method for grouting of perforated pipe pile in stone-nitre area |
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