CN112663418A - Pile-supported high embankment and construction method - Google Patents
Pile-supported high embankment and construction method Download PDFInfo
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- CN112663418A CN112663418A CN202011508368.0A CN202011508368A CN112663418A CN 112663418 A CN112663418 A CN 112663418A CN 202011508368 A CN202011508368 A CN 202011508368A CN 112663418 A CN112663418 A CN 112663418A
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Abstract
The invention discloses a pile-supported high embankment and a construction method thereof, belonging to the technical field of embankment construction. The method comprises the steps of firstly, measuring and positioning; driving the prefabricated pipe pile into a preset position and a preset depth through a pile driver; step three, mounting an isolation supporting plate; step four, slurry pouring: pouring a light active mixture into the precast tubular pile through a grouting pipe; laying a double-layer high-strength steel wire grid; step six, pile cap pouring: prefabricating a reinforcement cage in the pile, placing the reinforcement cage in the pile into the top of the prefabricated pipe pile, and pouring to integrate the prefabricated pipe pile and the pile cap; step seven, beam tying construction: pouring a tie beam between two adjacent pile caps; and step eight, paving a gravel cushion layer and backfilling an embankment. The pile-supported embankment with the enhanced high roadbed bearing capacity can be built through the steps.
Description
Technical Field
The invention belongs to the technical field of embankment construction, and particularly relates to a pile-supported high embankment and a construction method thereof.
Background
Soft soil layers are widely distributed under highway foundations of China Hubei, Hunan and coastal provinces, cities and other places. If the highway is newly built on the highway, serious quality problems and even damages can be caused if the highway is not properly treated, such as pavement cracking or platform faults can seriously affect the driving safety and the driving speed, and the highway needs to be maintained all the year round. Rigid concrete pipe piles such as prestressed PHC pipe piles are widely applied to treatment of various deep and thick soft foundations due to the advantages of pile forming quality, treatment depth, treatment effect and the like.
The following problems exist in the construction process of the prior precast tubular pile: the anchoring property and the connectivity between the precast tubular pile and the soft soil are not strong, and the pile soil cannot be well embedded; the connectivity between the pile pipe and the pile cap and between the pile cap and the pile cap is poor, and the structural integrity of the whole pile is not strong.
Disclosure of Invention
The invention aims to improve the connectivity between pile soils, strengthen the structural integrity of pile bearings and improve the bearing capacity of a roadbed.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a pile-supported high embankment construction method, which comprises the following steps:
step one, measurement and positioning: determining and marking the driving position of the precast tubular pile, and marking the starting and stopping positions and the elevation control lines of the slope;
step two, piling: driving the prefabricated pipe pile into a preset position and a preset depth through a pile driver;
step three, mounting an isolation supporting plate: the isolation supporting plate is provided with a grouting pipe and a lifting hook, the lifting hook is hooked at the upper port of the precast tubular pile, and the grouting pipe extends into the precast tubular pile;
step four, slurry pouring: pouring a light active mixture into the precast tubular pile through a grouting pipe, and enabling the light active mixture to flow out through pipe holes in the precast tubular pile to be mixed and consolidated with soil;
step five, laying a double-layer high-strength steel wire grid: laying double-layer high-strength steel wire grids around the top of the precast tubular pile after static pressure is finished, and binding the intersection of the double-layer high-strength steel wire grids and the precast tubular pile by adopting binding wires;
step six, pile cap pouring: prefabricating a reinforcement cage in the pile, putting the reinforcement cage in the pile into the top of the prefabricated pipe pile, binding pile cap reinforcements at the upper part of the double-layer high-strength steel wire grid, connecting the prefabricated pipe pile and binding the pile cap reinforcements at two ends of the reinforcement cage in the pile, and pouring to integrate the prefabricated pipe pile and the pile cap;
step seven, beam tying construction: and pouring a tie beam between two adjacent pile caps.
And step eight, paving a gravel cushion layer and backfilling an embankment.
Furthermore, after the gravel cushion layer is laid, the road surface is subjected to back pressure through the prefabricated stones.
And further, a geogrid is laid on the gravel cushion layer, backfill soil is filled at the top of the geogrid according to a designed elevation, and a sub-base layer, a base layer and a surface layer are sequentially laid on the backfill soil.
Furthermore, the backfill soil has a slope surface, and the slope height and the slope width ratio are 1: 15.
Further, the end of the precast tubular pile is provided with a cast iron pile tip, the precast tubular pile is provided with a pile wall, and the pile wall is provided with a pipe hole.
Further, the light active mixture is mainly prepared by mixing quicklime, industrial slag, fine sand and water.
And further, tying beam reinforcing steel bars are bound between two adjacent pile caps during the construction of the tying beam, tying beam templates are erected on two sides of the tying beam reinforcing steel bars, the tying beam templates are fixed in a counter-pulling mode through counter-pulling screws, and concrete is poured.
A pile-supported high embankment is constructed by the method.
The invention has the following beneficial effects:
the prefabricated reinforced concrete pipe with the pipe hole is used as the prefabricated pipe pile, the pile-soil connectivity is enhanced through pouring light and active mixture, the anchorage and the embedding of the pile and the soil body are enhanced, concrete in the pile and concrete of the pile cap are poured into a whole, the tie beam is arranged between the pile caps, and the whole pile-bearing structure is strong in integrity and strong in road bearing capacity.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a pile-supported structure of the invention;
FIG. 2 is a schematic plan view of a pile-supported structure of the invention;
FIG. 3 is an enlarged view of a precast tubular pile structure;
FIG. 4 is a schematic view of a suspended isolation pallet configuration;
fig. 5 is a layered structure view of the pile-supported embankment of the present invention;
fig. 6 is a schematic view of the overall structure of the pile-supported high embankment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-original roadbed; 2-cast iron pile tip; 3-light active mixture; 4-pipe hole; 5-pile wall; 6-grouting pipe; 7-an isolation supporting plate; 8-a hook; 9-double-layer high-strength steel wire grating; 10-reinforcement cage in the pile; 11-pile cap reinforcing steel bars; 12-pile caps; 13-tie beam formwork; 14-a counter-pulling screw; 15-prefabricating the tubular pile; 16-a tie-beam; 17-a gravel cushion; 18-layer geogrid; 19-backfilling; 20-an underlayer; 21-a base layer; 22-surface layer; 23-precast block stone.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
The invention does not need to describe the technical requirements of welding between the reinforcing steel bars, concrete pouring key points, rammed earth, pile foundation construction quality standards and the like, and mainly explains the implementation mode of the structure of the invention.
Referring to fig. 1-6, the present invention is a pile-supported high embankment.
The surface layer of the original roadbed 1 is sequentially provided with a gravel cushion layer 17, a geogrid 18, a backfill soil layer 19, an underlayer 20, a base layer 21 and a surface layer 22.
Specifically, a row of precast tubular piles 15 are arranged in an original roadbed 1, a light active mixture 3 connected with the original roadbed 1 is poured in the precast tubular piles 15, cast iron pile tips 2 are arranged at the end parts of the precast tubular piles 15, the cast iron pile tips 2 face downwards, the precast tubular piles 15 are provided with pile walls 5, and pipe holes 4 are formed in the pile walls 5; namely, when the light active mixture 3 is poured into the precast tubular pile 15, the light active mixture 3 flows out of the pipe hole 4 and is mixed into the soil of the original roadbed 1.
Wherein the light active mixture 3 is mainly prepared by mixing quicklime, industrial slag, fine sand, water, an additive and the like.
The tail end of a concrete precast tubular pile 15 is driven into the surface of the original roadbed 1, the tail end of the precast tubular pile 15 is provided with an isolation supporting plate 7, the isolation supporting plate 7 is provided with a lifting hook 8, a grouting pipe 6 is arranged in the isolation supporting plate 7, grouting is carried out through the grouting pipe 6 to be compact, and the lifting hook 8 is hung at the tail end of the precast tubular pile 15 when the precast tubular pile 15 is poured.
The top of its precast tubular pile 15 is equipped with pile cap 12, and pile cap 12 is formed by pouring by pile cap reinforcing bar 11 and interior reinforcing bar cage 10 of stake, and the tail end of precast tubular pile 15 is equipped with interior reinforcing bar cage 10 of stake, and precast tubular pile 15, pile cap reinforcing bar 11 are connected respectively at the both ends of interior reinforcing bar cage 10 of stake, and precast tubular pile 15, pile cap 12 integration after pouring.
And a tie beam 16 is laid on the adjacent pile caps 12, a reinforcement cage is prefabricated between the pile caps 12 when the tie beam 16 is poured, a tie beam template 13 is installed outside the reinforcement cage, and the tie beam is shaped and poured through a pull screw 14.
Preferably, the high-strength steel wire grating 9 is laid on the surface of the original roadbed 1, and concrete is poured on the high-strength steel wire grating 9 to form a laying foundation surface.
A pile-supported high embankment construction method comprises the following steps:
step one, measurement and positioning: determining and marking the driving position of the precast tubular pile 15, and marking the starting and stopping positions of the slope and an elevation control line;
before measurement and positioning, construction preparation is needed, namely, a construction site is cleaned, the ground surface is leveled, a pile position is designed according to a drawing, a foundation treatment range is released, a pile position plane layout drawing is drawn, a temporary land acquisition boundary pile and a permanent land acquisition boundary pile are arranged, and white grey and bamboo sticks are used for making striking marks.
Step two, piling: driving the prefabricated pipe pile 15 into a preset position and a preset depth through a pile driver;
specifically, the precast tubular pile 15 is hoisted by a crane and placed into a pile driver, and the pile driver presses the precast tubular pile 15 into the original roadbed 1 by the designed depth according to the position marked by the lime of the tubular pile by adopting a static pressure method.
Step three, mounting an isolation supporting plate 7: the isolation supporting plate 7 is provided with a grouting pipe 6 and a lifting hook 8, the lifting hook 8 is hooked at the upper port of the precast tubular pile 15, and the grouting pipe 6 extends into the precast tubular pile 15;
step four, slurry pouring: pouring a light active mixture 3 into the precast tubular pile 15 through a grouting pipe 6, and enabling the light active mixture 3 to flow out through a pipe hole 4 in the precast tubular pile 15 to be mixed and consolidated with soil;
wherein the light active mixture 3 is mainly prepared by mixing quicklime, industrial slag, fine sand and water.
Step five, laying a double-layer high-strength steel wire grid 9: laying double-layer high-strength steel wire grids 9 around the top of the precast tubular pile 15 subjected to static pressure, and binding the intersection of the double-layer high-strength steel wire grids 9 and the precast tubular pile 15 by using binding wires;
step six, pouring the pile cap 12: prefabricating a pile inner reinforcement cage 10, putting the pile inner reinforcement cage 10 into the top of a prefabricated pipe pile 15, binding pile cap reinforcements 11 on the upper part of a double-layer high-strength steel wire grid 9, connecting the prefabricated pipe pile 15 and the binding pile cap reinforcements 11 at two ends of the pile inner reinforcement cage 10, and pouring to integrate the prefabricated pipe pile 15 and a pile cap 12;
step seven, beam 16 construction: and pouring a tie beam 16 between two adjacent pile caps 12.
Specifically, tie beam reinforcing steel bars are bound between two adjacent pile caps 12 during construction of tie beams 16, tie beam formworks 13 are erected on two sides of the tie beam reinforcing steel bars, the tie beam formworks 13 are fixed in a counter-pulling mode through counter-pulling screw rods 14, and concrete is poured.
And step eight, paving a gravel cushion layer 17 and backfilling an embankment.
Wherein after the gravel cushion 17 is laid, the pavement is back-pressed by the prefabricated stones 23.
Furthermore, a geogrid 18 is laid on the gravel cushion layer 17, backfill soil 19 is filled at the top of the geogrid 18 according to a designed elevation, and a sub-base layer 20, a base layer 21 and a surface layer 22 are sequentially laid on the backfill soil 19.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A pile-supported high embankment construction method is characterized by comprising the following steps:
step one, measurement and positioning: determining the driving position of the precast tubular pile (15), marking, and marking the starting and stopping positions of the slope and an elevation control line;
step two, piling: driving the prefabricated pipe pile (15) into a preset position and a preset depth through a pile driver;
step three, mounting an isolation supporting plate (7): a grouting pipe (6) and a lifting hook (8) are arranged on the isolation supporting plate (7), the lifting hook (8) is hooked at the upper port of the precast tubular pile (15), and the grouting pipe (6) extends into the precast tubular pile (15);
step four, slurry pouring: pouring a light active mixture (3) into the precast tubular pile (15) through a grouting pipe (6), and enabling the light active mixture (3) to flow out through a pipe hole 4 in the precast tubular pile (15) to be mixed and consolidated with soil;
step five, laying a double-layer high-strength steel wire grid (9): laying double-layer high-strength steel wire grids (9) around the top of the precast tubular pile (15) which is subjected to static pressure, and binding the intersection of the double-layer high-strength steel wire grids (9) and the precast tubular pile (15) by adopting binding wires;
step six, pouring the pile cap (12): prefabricating a reinforcement cage (10) in the pile, putting the reinforcement cage (10) in the pile into the top of a prefabricated tubular pile (15), binding pile cap reinforcements (11) on the upper part of a double-layer high-strength steel wire grid (9), connecting the prefabricated tubular pile (15) and the pile cap reinforcements (11) at two ends of the reinforcement cage (10) in the pile, and pouring to integrate the prefabricated tubular pile (15) and the pile cap (12);
seventhly, beam tying (16) construction: pouring a tie beam (16) between two adjacent pile caps (12);
step eight, paving a gravel cushion layer (17) and backfilling the embankment.
2. A pile-supported high embankment construction method according to claim 1, characterized in that after the gravel pack (17) is laid, the road surface is back-pressed by means of prefabricated stones (23).
3. The method for constructing the pile-supported high embankment according to claim 1, wherein the gravel bed (17) is provided with a geogrid (18), the top of the geogrid (18) is filled with backfill soil (19) according to a designed elevation, and the backfill soil (19) is provided with a sub-bed (20), a base layer (21) and a surface layer (22) in sequence.
4. A pile-supported high embankment and method according to claim 3, wherein the backfill (19) has a slope with a height and width ratio of 1: 15.
5. A pile-supported high embankment construction method according to claim 1, wherein the precast tubular pile (15) has a cast iron pile tip (2) at the end, the precast tubular pile (15) has a pile wall (5), and the pile wall (5) has a pipe hole (4).
6. The construction method of the pile-supported high embankment according to claim 1, wherein the lightweight reactive mixture (3) is mainly prepared by mixing quicklime, industrial slag, fine sand and water.
7. The pile-supported high embankment construction method according to claim 1, wherein the tie beam (16) is constructed, tie beam steel bars are bound between two adjacent pile caps (12), tie beam templates (13) are erected on two sides of the tie beam steel bars, the tie beam templates (13) are fixed in a counter-pulling mode through counter-pulling screw rods (14), and concrete is poured.
8. A pile-supported high embankment according to claim 1, constructed by a method according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011508368.0A CN112663418A (en) | 2020-12-18 | 2020-12-18 | Pile-supported high embankment and construction method |
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| CN202011508368.0A CN112663418A (en) | 2020-12-18 | 2020-12-18 | Pile-supported high embankment and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658022A (en) * | 2022-02-28 | 2022-06-24 | 河海大学 | Multi-pile connecting rod combined foundation for high-rise structure and using method |
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2020
- 2020-12-18 CN CN202011508368.0A patent/CN112663418A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101313207B1 (en) * | 2011-08-26 | 2013-09-30 | 석정건설주식회사 | Apparatus Equipped with Earth Auger for Deep Cement Mixing at Sea Bed and Process thereof |
| CN105648867A (en) * | 2016-03-02 | 2016-06-08 | 杭州江润科技有限公司 | Comprehensive ecological roadbed system and construction method |
| CN106835878A (en) * | 2017-01-24 | 2017-06-13 | 华中科技大学 | A kind of embankment structure and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114658022A (en) * | 2022-02-28 | 2022-06-24 | 河海大学 | Multi-pile connecting rod combined foundation for high-rise structure and using method |
| CN114658022B (en) * | 2022-02-28 | 2022-11-29 | 河海大学 | Multi-pile connecting rod combined foundation for high-rise structure and using method |
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