CN111877337A - Foundation pile construction method - Google Patents
Foundation pile construction method Download PDFInfo
- Publication number
- CN111877337A CN111877337A CN202010548792.1A CN202010548792A CN111877337A CN 111877337 A CN111877337 A CN 111877337A CN 202010548792 A CN202010548792 A CN 202010548792A CN 111877337 A CN111877337 A CN 111877337A
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- pile
- foundation
- pile body
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- side wall
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- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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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
Abstract
The invention discloses a foundation pile construction method, which comprises the following steps of preparing a precast pile for later use; the precast pile comprises a tubular pile body and a connecting block provided with a plurality of through holes, and the side wall of the top of the pile body is provided with a connecting hole; step two, cleaning the ground to be constructed and tamping; step three, determining and marking the position of the foundation pile to be constructed on the tamped ground; fourthly, excavating pile holes at the marked positions of the construction foundation piles, leveling the bottoms of the pile holes, and scattering the foundation materials taken out during pile hole excavation for later use; putting the pile body into the pile hole, adding a curing agent and a binder into the foundation material taken out during pile hole digging, uniformly mixing to obtain a mixed foundation material, quickly adding the mixed foundation material into the gap of the pile hole and the hollow position in the pile body, and tamping the mixed foundation material newly added into the pile hole; and step six, inserting the connecting block into the pile body, and inserting reinforcing steel bars into the matched connecting holes and the through holes. The method of the invention has strong practicability and stable pile-forming structure.
Description
Technical Field
The invention relates to the technical field of building construction. More particularly, the present invention relates to a foundation pile construction method.
Background
The foundation pile construction method refers to a construction method of a single pile in the pile foundation construction process, and the existing foundation pile construction methods mainly comprise three methods: hammer, hydrostatic, and submerged. The hammering type and static pressure type refer to a construction method of driving or pressing a precast pile into a stratum by adopting a physical method, and the precast pile is easy to be damaged in the driving process, so that the performance of the precast pile is reduced; the embedded type is that concrete piles are poured in the stratum of a construction site, the quality of the concrete piles poured in the site is difficult to control, and the pile forming quality is unstable.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
It is still another object of the present invention to provide a foundation pile construction method which can effectively solve the problem of damage to the main body of a precast pile when driving and installing and can ensure the overall quality of a pile by preferentially preparing the precast pile and then drilling, placing and filling.
To achieve these objects and other advantages in accordance with the present invention, there is provided a foundation pile construction method including the steps of:
step one, preparing a precast pile for later use;
the precast pile includes:
the pile body is of a tubular structure, the pile body is vertically arranged, the bottom of the pile body is provided with a base, the base is in a ring shape with a horizontal bottom, the base is arranged around the outer side of the pile body, the bottom of the base and the bottom of the pile body are positioned on the same horizontal plane, a first reinforcing plate is vertically arranged between the outer side wall of the pile body and the base, a plurality of trumpet-shaped resistance rings are arranged along the circumferential direction of the outer side wall of the pile body, an included angle between the side wall of the resistance ring and the outer side wall of the pile body above the resistance ring is an acute angle, a plurality of second reinforcing plates are uniformly arranged between the side wall of the resistance ring and the outer side wall of the pile body, the side wall of the resistance ring is provided with a plurality of material leaking holes, the side wall of the upper part of the pile body is provided with a plurality of connecting holes, a plurality of stiffening rods are arranged in the pile body, and the positions of the stiffening rods and the resistance ring are lower than the connecting holes;
the height of the connecting block is not less than the distance between the connecting hole and the top of the pile body, a plurality of through holes matched with the connecting hole are formed in the connecting block, and reinforcing steel bars are vertically inserted into the connecting block;
step two, cleaning the ground to be constructed and tamping;
step three, determining and marking the position and the range of the foundation pile to be constructed on the tamped ground;
fourthly, excavating a pile hole at the marked position of the construction foundation pile, leveling the bottom of the pile hole, wherein the depth of the pile hole is not more than the distance between the bottom of the base and the connecting hole, and scattering the foundation material taken out during pile hole excavation for later use;
putting the pile body into the pile hole, adding a curing agent and a binder into the foundation material taken out during pile hole digging, uniformly mixing to prepare a mixed foundation material, keeping the pile body vertical, quickly adding the mixed foundation material into the gap of the pile hole and the hollow position in the pile body, tamping the mixed foundation material newly added into the pile hole until the tamping interface position reaches the connecting hole;
and step six, inserting the connecting block into the pile body, enabling the connecting hole to be opposite to the through hole, and inserting reinforcing steel bars into the matched connecting hole and the through hole.
Preferably, in the foundation pile construction method, the number of the first reinforcing plates is not less than 3.
Preferably, in the foundation pile construction method, the material leaking hole is located at a connection position of the bottom of the side wall of the resistance ring and the outer side wall of the pile body.
Preferably, in the foundation pile construction method, the stiffening rods are provided so as to cross each other in a hollow portion in the pile body.
Preferably, in the foundation pile construction method, the first reinforcing plate is a right triangle, and two right-angle sides are respectively connected with the pile body side wall and the base.
Preferably, in the foundation pile construction method, a hollow portion in the pile body is formed in an inverted funnel shape.
Preferably, in the foundation pile construction method, the addition amount of the curing agent is 10-18% of the weight of the foundation material; the addition amount of the binder is 4-8% of the weight of the foundation material; the curing agent comprises the following components in percentage by weight: 15-20% of cement, 15-25% of sepiolite, 15-20% of basic calcium phosphate, 20-25% of wollastonite, 8-13% of lubricating oil and 7-12% of calcium carbonate; the binder is polyvinyl acetate.
The sepiolite is a chain-type layered structure, and the structural unit of the sepiolite consists of two layers of silicon-oxygen tetrahedrons, mirror oxygen cation octahedrons sandwiched between the two layers of silicon-oxygen tetrahedrons and para-hydrated cations adsorbed between crystal layers. Sepiolite has a large specific surface area and a special structure with abundant gaps, and is determined to have good physicochemical properties, strong surface adsorption and strong ion exchange capacity.
The basic calcium phosphate is a porous material with structural pore canals, and the chemical characteristics of the structural pore canals and the apatite have an adsorption effect on most ions in soil.
The mixed foundation material constructs a frame through sepiolite and basic calcium phosphate in a curing agent, adsorbs and frames various particles in the foundation material, can provide a gluing effect through cement and polyvinyl acetate, and aggregates the various particles in the foundation material; the wollastonite can increase the adsorption of sepiolite and basic calcium phosphate to various particles in the foundation material, thereby not only increasing the agglomeration capacity of the foundation material, promoting the tight connection of the mixed foundation material and the foundation material in the pile hole, but also improving the friction performance of the mixed foundation material, increasing the friction force between the mixed foundation material and the precast pile and ensuring that the whole foundation pile is not easy to crack and shake. The adsorption force of the mixed foundation material to the pile hole foundation and the friction force to the precast pile can effectively increase the tensile and compressive strength of the foundation pile. The wollastonite can also improve the hardness of the foundation material and increase the compression-resistant and earthquake-resistant effects of the whole foundation pile. The cement increases the weight of the mixed foundation material, and further increases the pulling resistance of the mixed foundation material. Lubricating oil is mixed with calcium carbonate and then added into the curing agent, the calcium carbonate added with the lubricating oil is mixed into the foundation material, so that the friction force between the agglomerated foundation material and the foundation material as well as the precast pile can be temporarily reduced, the mixed foundation material can rapidly pass through the connecting hole and the gap between the precast pile and the pile hole, the balanced distribution of the mixed foundation material is promoted, the construction progress is accelerated, and the lubricating oil is added into the curing agent by taking the calcium carbonate as a carrier, so that the effect of the lubricating oil on other components in the curing agent and the foundation material is avoided.
The invention at least comprises the following beneficial effects:
the resistance ring is horn-shaped, the small opening end of the resistance ring is connected with the outer side wall of the pile body, the position of the large opening end of the resistance ring is higher than that of the small opening end of the resistance ring, when the pile body is subjected to transverse or vertical pulling force, the resistance ring is contacted with mixed foundation materials and then connected with a foundation layer, and the resistance ring provides force opposite to the pulling force, so that the position of the pile body can be stabilized; when the pile body is pressed downwards, the horizontal annular base can enable the pile body not to fall easily by virtue of a larger contact area with the foundation layer, and the position of the pile body is further stabilized; adding mixed foundation materials into the gaps of the pile holes in the foundation pile construction process, wherein the mixed foundation materials can move to the deep parts of the pile holes along the side walls of the pile bodies through the material leaking holes, so that the moving speed of the mixed foundation materials is increased; the first reinforcing plate can effectively stabilize the connection relation between the pile body and the base, and the second reinforcing plate can effectively stabilize the connection relation between the resistance ring and the pile body; fifthly, the connecting block is connected with the pile body through the reinforcing steel bar in a reinforcing way, so that the tensile strength of the whole precast pile can be increased; sixth, the invention recycles foundation material, saves resources; and seventhly, the binder is added into the mixed foundation material, so that the connection relation among the mixed foundation material, the pile body and the foundation can be effectively increased.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of a foundation pile according to the present invention;
fig. 2 is a schematic top view of the drag ring of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As shown in fig. 1 and 2, the present invention provides a foundation pile construction method, including the steps of:
step one, preparing a precast pile for later use;
the precast pile includes:
the pile body 11 is of a tubular structure, the pile body 11 is vertically arranged, a base 1 is arranged at the bottom of the pile body 11, the base 1 is of a circular ring shape with the horizontal bottom, the base 1 is arranged around the outer side of the pile body 11, the bottom of the base 1 and the bottom of the pile body 11 are positioned on the same horizontal plane, a first reinforcing plate 2 is vertically arranged between the outer side wall of the pile body 11 and the base 1, a plurality of horn-shaped resistance rings 4 are circumferentially arranged along the outer side wall of the pile body 11, an included angle between the side wall of each resistance ring 4 and the outer side wall of the pile body 11 above the side wall is an acute angle, a plurality of second reinforcing plates 5 are uniformly arranged between the side wall of each resistance ring 4 and the outer side wall of the pile body 11, a plurality of material leaking holes 3 are arranged on the side wall of the resistance ring 4, a plurality of connecting holes 10 are arranged on the side wall of the upper portion of the pile body 11, the positions of the stiffening rods 6 and the resistance ring 4 are lower than the connecting holes 10;
the height of the connecting block 8 is not less than the distance between the connecting hole 10 and the top of the pile body 11, a plurality of through holes 9 matched with the connecting hole 10 are formed in the connecting block 8, and reinforcing steel bars 7 are vertically inserted into the connecting block 8;
step two, cleaning the ground to be constructed and tamping;
step three, determining and marking the position and the range of the foundation pile to be constructed on the tamped ground;
fourthly, excavating a pile hole at the marked position of the construction foundation pile, leveling the bottom of the pile hole, wherein the depth of the pile hole is not more than the distance between the bottom of the base 1 and the connecting hole, and scattering the foundation material taken out during pile hole excavation for later use;
putting the pile body 11 into the pile hole, adding a curing agent and a binder into the foundation material taken out during pile hole digging, uniformly mixing to prepare a mixed foundation material 12, keeping the pile body 11 vertical, quickly adding the mixed foundation material 12 into the gap of the pile hole and the hollow position in the pile body, and tamping the mixed foundation material 12 newly added into the pile hole until the tamping interface position reaches the connecting hole 10;
and step six, inserting the connecting block 8 into the pile body 11, enabling the connecting hole 10 and the through hole 9 to be oppositely arranged, and inserting reinforcing steel bars into the matched connecting hole and the through hole.
In the technical scheme, the resistance ring is horn-shaped, the small opening end of the resistance ring is connected with the outer side wall of the pile body, the position of the large opening end of the resistance ring is higher than that of the small opening end of the resistance ring, when the pile body is subjected to transverse or vertical pulling force, the resistance ring is contacted with the mixed foundation material and then is connected with the foundation layer, and the resistance ring provides force opposite to the pulling force to stabilize the position of the pile body; when the pile body is pressed downwards, the horizontal annular base is difficult to drop by virtue of larger contact area with the foundation layer, so that the position of the pile body is stabilized; in the foundation pile construction process, the mixed foundation material is added into the pile hole gap, and can move to the deep part of the pile hole along the side wall of the pile body through the material leakage hole, so that the moving speed of the mixed foundation material is accelerated; the first reinforcing plate is used for stabilizing the connection relation between the pile body and the base; the second reinforcing plate is used for stabilizing the connection relation between the resistance ring and the pile body; the connecting block is connected with the pile body through the reinforcing steel bars in a reinforcing manner to increase the tensile strength of the whole precast pile, and the top of the connecting block can be provided with connecting objects with different specifications according to actual needs; in the invention, the foundation material is recycled, so that the resources are saved; the mixed foundation material is added with the binder to increase the connection relation among the mixed foundation material, the pile body and the foundation.
In the technical scheme, the addition amount of the curing agent is 14 percent of the weight of the foundation material; the addition amount of the binder is 6 percent of the weight of the foundation material; the curing agent comprises the following components in percentage by weight: 18% of cement, 20% of sepiolite, 18% of basic calcium phosphate, 23% of wollastonite, 10% of lubricating oil and 10% of calcium carbonate; the binder is polyvinyl acetate.
Compared with the foundation pile constructed by the conventional hammering type, static pressure type and embedded type methods, the foundation pile constructed and formed by the technical scheme has greatly improved tensile strength and compressive strength, and is intersected with the foundation pile hole filled with the original base material.
In another technical scheme, in the foundation pile construction method, the number of the first reinforcing plates is not less than 3. When the pile body received ascending pulling force, the base also received ascending pulling force indirectly, for making the base atress even, 3 are no less than to first reinforcing plate number.
In another technical solution, as shown in fig. 1 and 2, in the foundation pile construction method, the material leaking hole 3 is located at a connection between the bottom of the side wall of the resistance ring 4 and the outer side wall of the pile body 11. Make things convenient for mixed ground material to follow the smooth landing of pile body lateral wall to stake hole bottom, to the effort of resistance ring when minimizing mixed ground material whereabouts, prevent that the resistance ring from suffering destruction when foundation pile construction.
In another embodiment, as shown in fig. 1, in the foundation pile construction method, the stiffeners 6 are provided to cross each other in a hollow portion in the pile body 11. The resistance to the mixed foundation material entering the interior of the pile body is reduced, and the stiffening rods can provide a part of opposite force to fix the pile body when the pile body is impacted by the force.
In another technical solution, as shown in fig. 1, in the foundation pile construction method, the first reinforcing plate 2 is a right triangle, and two right-angled sides are respectively connected to the side wall of the pile body 11 and the base 1. According to the principle that the triangle has stability, the first reinforcing plate is preferably a right-angled triangle, and materials can be further saved.
In another technical solution, as shown in fig. 1, in the foundation pile construction method, a hollow portion in the pile body 11 is formed in an inverted funnel shape. The hollow portion bottom of pile body promptly is the major diameter end, and the funnel-shaped ability of standing upside down increases the area of contact of the interior bottom mixed foundation material of pile body and former ground to increase the pile body and the grip of ground.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details shown and described herein without departing from the generic concept as defined by the claims and their equivalents.
Claims (7)
1. The foundation pile construction method is characterized by comprising the following steps:
step one, preparing a precast pile for later use;
the precast pile includes:
the pile body is of a tubular structure, the pile body is vertically arranged, the bottom of the pile body is provided with a base, the base is in a ring shape with a horizontal bottom, the base is arranged around the outer side of the pile body, the bottom of the base and the bottom of the pile body are positioned on the same horizontal plane, a first reinforcing plate is vertically arranged between the outer side wall of the pile body and the base, a plurality of trumpet-shaped resistance rings are arranged along the circumferential direction of the outer side wall of the pile body, an included angle between the side wall of the resistance ring and the outer side wall of the pile body above the resistance ring is an acute angle, a plurality of second reinforcing plates are uniformly arranged between the side wall of the resistance ring and the outer side wall of the pile body, the side wall of the resistance ring is provided with a plurality of material leaking holes, the side wall of the upper part of the pile body is provided with a plurality of connecting holes, a plurality of stiffening rods are arranged in the pile body, and the positions of the stiffening rods and the resistance ring are lower than the connecting holes;
the height of the connecting block is not less than the distance between the connecting hole and the top of the pile body, a plurality of through holes matched with the connecting hole are formed in the connecting block, and reinforcing steel bars are vertically inserted into the connecting block;
step two, cleaning the ground to be constructed and tamping;
step three, determining and marking the position and the range of the foundation pile to be constructed on the tamped ground;
fourthly, excavating a pile hole at the marked position of the construction foundation pile, leveling the bottom of the pile hole, wherein the depth of the pile hole is not more than the distance between the bottom of the base and the connecting hole, and scattering the foundation material taken out during pile hole excavation for later use;
putting the pile body into the pile hole, adding a curing agent and a binder into the foundation material taken out during pile hole digging, uniformly mixing to prepare a mixed foundation material, keeping the pile body vertical, quickly adding the mixed foundation material into the gap of the pile hole and the hollow position in the pile body, tamping the mixed foundation material newly added into the pile hole until the tamping interface position reaches the connecting hole;
and step six, inserting the connecting block into the pile body, enabling the connecting hole to be opposite to the through hole, and inserting reinforcing steel bars into the matched connecting hole and the through hole.
2. The foundation pile constructing method according to claim 1, wherein the number of the first reinforcing plates is not less than 3.
3. The method of constructing a foundation pile of claim 1, wherein the weep hole is located at the junction of the bottom of the side wall of the resistance ring and the outer side wall of the pile body.
4. The foundation pile construction method according to claim 1, wherein the stiffening rods are arranged to cross in a hollow portion in the pile body.
5. The method of constructing a foundation pile of claim 1, wherein the first reinforcing plate is a right triangle, and two right-angled sides are connected to the side wall of the pile body and the base, respectively.
6. The method of constructing a foundation pile according to claim 1, wherein the hollow portion of the pile body has an inverted funnel shape.
7. The foundation pile construction method according to claim 1, wherein the curing agent is added in an amount of 10-18% by weight based on the weight of the foundation material; the addition amount of the binder is 4-8% of the weight of the foundation material; the curing agent comprises the following components in percentage by weight: 15-20% of cement, 15-25% of sepiolite, 15-20% of basic calcium phosphate, 20-25% of wollastonite, 8-13% of lubricating oil and 7-12% of calcium carbonate; the binder is polyvinyl acetate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010548792.1A CN111877337B (en) | 2020-06-16 | 2020-06-16 | Foundation pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010548792.1A CN111877337B (en) | 2020-06-16 | 2020-06-16 | Foundation pile construction method |
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| Publication Number | Publication Date |
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| CN111877337A true CN111877337A (en) | 2020-11-03 |
| CN111877337B CN111877337B (en) | 2021-12-21 |
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| CN202010548792.1A Active CN111877337B (en) | 2020-06-16 | 2020-06-16 | Foundation pile construction method |
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| CN207582459U (en) * | 2017-12-06 | 2018-07-06 | 山东科技大学 | A kind of prefabricated steel-pipe pile of variable cross-section |
| CN208105254U (en) * | 2018-04-09 | 2018-11-16 | 河南中力杆塔股份有限公司 | A kind of novel pre-stressed PHC tubular pole |
| CN208844555U (en) * | 2018-09-18 | 2019-05-10 | 西华大学 | Pulling-resistant type concrete tubular pile |
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2020
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|---|---|---|---|---|
| CN2782762Y (en) * | 2005-01-31 | 2006-05-24 | 黄强 | Prestressed concrete hollow square section pile and tip of same |
| CN206128058U (en) * | 2016-05-26 | 2017-04-26 | 陈雷 | Prefabricated abnormal shape stake of multistage hole enlargement |
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| CN111877337B (en) | 2021-12-21 |
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