CN113174987B - Tree root type resistance to plucking piling bar basis - Google Patents
Tree root type resistance to plucking piling bar basis Download PDFInfo
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- CN113174987B CN113174987B CN202110372867.XA CN202110372867A CN113174987B CN 113174987 B CN113174987 B CN 113174987B CN 202110372867 A CN202110372867 A CN 202110372867A CN 113174987 B CN113174987 B CN 113174987B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
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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
- E02D5/28—Prefabricated piles made of steel or other metals
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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
- E02D5/54—Piles with prefabricated supports or anchoring parts; Anchoring piles
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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
- E02D5/56—Screw piles
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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
- E02D5/60—Piles with protecting cases
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/1671—Shapes helical or spiral
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a novel tree root type uplift steel pile foundation. It includes the root anchor driven into the ground and the pile base on the ground; and the plurality of root anchors are fixed at the bottom of the pile seat through fixing clamps. The fixing clamp for connecting the root anchor and the pile seat comprises a left half clamp and a right half clamp which are symmetrical and a bolt fastener. The upper end of the clamp seat is provided with a wedge-shaped bulge, when the tree root anchor is fixed, the wedge-shaped bulges of the left and right L-shaped half clamping plates are inserted into the rectangular groove holes corresponding to the tree root anchor, and bolt fasteners on two sides of the L-shaped half clamping plates are screwed down to clamp the clamp tightly, so that the wedge-shaped bulge is firmly attached to the mounting hole of the tree root anchor.
Description
Technical Field
The invention belongs to the technical field of construction and construction, and particularly relates to a novel tree root type uplift steel pile foundation.
Background
In the existing pile foundation, the uplift resistance of the pile is mainly achieved through the friction force of the whole pile body, and the uplift resistance is in direct proportion to the perimeter and the length of the pile body and the friction side resistance of soil. Because the resistance to plucking is provided mainly by friction, the greater the friction required, the greater the diameter and length of the pile required, the greater the material consumed and the lower the cost-effectiveness ratio of the material. Meanwhile, the horizontal bearing capacity and the bending moment of the pile are weak, so that the pile is not suitable for occasions with large horizontal force and bending moment. There is therefore a need for a new high performance pile foundation that addresses the above problems.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a novel tree root type uplift steel pile foundation which provides uplift through friction and has barb anchoring effect similar to biological root bifurcation.
The technical scheme adopted by the invention is as follows: a novel tree root type uplift steel pile foundation comprises an underground tree root anchor and an above-ground pile seat, wherein the underground tree root anchor is driven into the ground; and the plurality of root anchors are fixed at the bottom of the pile seat through fixing clamps.
Further preferred structure, the root anchor includes anterior segment part, main part stock and tail end, the anterior segment part is the screw thread end of taking helical blade, the main part stock is the circular steel tube, set up the round hole that is used for crimping wearing and tearing protective layer on the main part stock, the tail end is seted up and is used for the rectangle recess be connected with mounting fixture.
In a further preferred structure, the main body anchor rod circular steel tube comprises an outermost layer, an intermediate layer and an inner layer, wherein the outermost layer forms an abrasion protection layer through compression joint, the intermediate layer is an anti-corrosion coating, and the inner layer is the inner tube wall of the circular steel tube. The anticorrosive coating is protected from being damaged in the construction process.
In a further preferred structure, the wear protection layer is of an iron sheet structure.
Further preferable structure, the blade width of the thread of the threaded end is 10-20mm, the thread pitch is set to be 20-40mm, and the long thread length is 200-300 mm.
In a further preferable structure, the interval of each group of round holes of the round holes is not more than 200mm, and the number of the round holes is not less than 3 in each group along the circumferential direction.
Further preferred structure, mounting fixture includes two half splint of L shape, two half splint of L shape mutual dispositions, be provided with on the half splint of L shape be used for with rectangle recess complex wedge protruding with be connected first slotted hole with the pile foundation, fixed through the bolt fastener between two half splint of L shape, and the wedge arch is located between two half splint of L shape. The wedge-shaped bulge is extruded into the rectangular groove of the tree root anchor through the bolt fastener, so that the effect of clamping the tree root anchor is achieved.
Further preferred structure, the pile foundation includes pile foundation bottom plate and the steel structure stand of being connected perpendicularly with the pile foundation bottom plate, the annular distributes the multiunit on the pile foundation bottom plate and connects and use slotted hole, every group connect and use the slotted hole including be used for the root anchor pass the second slotted hole with be used for with first slotted hole complex third slotted hole, the direction of second slotted hole and third slotted hole is outwards scattered.
In a further preferred arrangement, the root anchor is driven into the ground at an angle of from 30 ° to 60 ° to the plane of the base plate of the base. The shape of the tree root is like a tree root inverted fork, so that a certain driving depth is ensured, and a certain barb anchoring length is also ensured.
The front section of the tree root anchor is a threaded end with a helical blade, and the mode of tree root anchor construction is changed from a hammer-in mode to a screw-in mode by arranging the thread, so that the construction is more convenient, and the progress is more controllable.
The fixing clamp for connecting the root anchor and the pile seat consists of a left half clamp and a right half clamp which are symmetrical and a bolt fastener. The upper end of the clamp seat is provided with a wedge-shaped bulge, when the tree root anchor is fixed, the wedge-shaped bulges of the left and right L-shaped half clamping plates are inserted into the rectangular groove holes corresponding to the tree root anchor, and bolt fasteners on two sides of the L-shaped half clamping plates are screwed down to clamp the clamp, so that the wedge-shaped bulge is firmly attached to the mounting hole of the tree root anchor. And finally, screwing a T-shaped bolt fastener for connecting the lower end of the clamp and the pile seat to complete the connection of the root anchor and the pile seat.
The upper end of the pile base is directly welded with a steel structure upright post, and the form of the steel structure upright post can be adjusted according to the specific specification of the steel structure upright post; the bottom of the pile base is a pile base bottom plate; several groups of oblong holes for connection are annularly distributed on the pile seat bottom plate, and the specific number of the groups can be adjusted according to actual requirements, and at least 3 groups are arranged; each group of the long round holes is provided with a large long round hole and two small long round holes, the large long round hole is used for penetrating a tree root anchor, the hole diameter is determined according to the size of the tree root anchor, and the small long round holes are used for penetrating a T-shaped bolt fastener connected with a fixing clamp; the direction of the long round hole is scattered outwards, so that the interference of the tree root anchor is avoided, and meanwhile, the construction of the tree root anchor is facilitated.
The front section of the root anchor is a threaded end, and the rear end of the root anchor is a circular steel tube anchor rod; the rear end circular tube anchor rod is provided with a plurality of circular holes on the circumference of the circular tube body; anticorrosive coating (anticorrosive coating such as asphalt paint) is scribbled to the pipe, for avoiding the outer end anticorrosive coating to squeeze into underground in-process wearing and tearing at the root anchor, through the crimping technique, crimping one deck sheet iron is as the wearing and tearing protective layer, through in the protruding embedding pipe round hole with sheet iron extrusion, makes iron sheet and the pipe wall connection who scribbles anticorrosive coating firm, guarantees that the anticorrosive coating can not be damaged by the friction in the work progress, influences the durability of root anchor.
The invention has the characteristics of small construction operation surface, quick and convenient construction and material saving, and is an economic, environment-friendly, simple and reliable foundation.
Drawings
FIG. 1 is a schematic view of the installation of a root anchor and a stake seat connected by a retaining clamp;
FIG. 2 is a schematic view of a root anchor;
FIG. 3 is a cross-sectional view of a root anchor;
FIG. 4 is a schematic view of the surface treatment of the main body anchor rod at the rear end of the root anchor;
FIG. 5 is a schematic view of a mounting clip and a fastener for attachment;
FIG. 6 is a schematic diagram of the structure of an L-shaped half clamp in a mounting fixture;
fig. 7 is a schematic view of a pile base structure.
Wherein, 1-a tree root anchor (1-1-a thread end, 1-2-a main body anchor rod, 1-2-1-a wear protection layer, 1-2-2-an anticorrosion coating, 1-2-3-an inner pipe wall, 1-3-a round hole, 1-4-a rectangular groove), 2-a fixing clamp (2-1-an L-shaped half splint, 2-1-1-a wedge-shaped bulge, 2-1-2-a first long round hole, 2-2-a bolt fastener and 2-3-a T-shaped bolt fastener), 3-pile seat (3-1-pile seat bottom plate, 3-2-steel structure upright post, 3-3-second long circular hole and 3-4-third long circular hole).
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
As shown in fig. 1, the present invention includes a root anchor 1 driven into the ground and a pile base 3 driven into the ground; a plurality of the root anchors 1 are fixed at the bottom of the pile seat 3 through fixing clamps 2.
As shown in fig. 2 and 3, the tree root anchor 1 comprises a front section part, a main body anchor rod 1-2 and a tail end, wherein the front section part is a threaded end 1-1 with a helical blade, the main body anchor rod 1-2 is a round steel pipe, a round hole 1-3 for crimping a wear protection layer is formed in the main body anchor rod 1-2, and a rectangular groove 1-4 for connecting with the fixing clamp 2 is formed in the tail end.
As shown in fig. 4, the main body anchor rod 1-2 circular steel tube comprises an outermost layer, an intermediate layer and an inner layer, wherein the outermost layer forms a wear protection layer 1-2-1 through compression joint, the intermediate layer is an anti-corrosion coating 1-2-2, and the inner layer is an inner tube wall 1-2-3 of the circular steel tube. The anticorrosive coating is protected from being damaged in the construction process.
The abrasion protection layer 1-2-1 is of an iron sheet structure.
The blade width of the thread of the threaded end 1-1 is 10-20mm, the thread pitch is set to be 20-40mm, and the long thread length is 200-300 mm.
The interval of each group of the round holes 1-3 is not more than 200mm, and each group is not less than 3 in the circumferential direction.
As shown in fig. 5 and 6, the fixing clamp 2 comprises two L-shaped half clamping plates 2-1, the two L-shaped half clamping plates 2-1 are oppositely arranged, wedge-shaped protrusions 2-1-1 matched with rectangular grooves 1-4 and first long round holes 2-1-2 connected with the pile base 3 are arranged on the L-shaped half clamping plates 2-1 and fixed through T-shaped bolt fasteners 2-3, the two L-shaped half clamping plates 2-1 are fixed through bolt fasteners 2-2, and the wedge-shaped protrusions 2-1-1 are located between the two L-shaped half clamping plates 2-1. The wedge-shaped protrusion is extruded into the rectangular groove of the tree root anchor through the bolt fastener 2-2, so that the effect of clamping the tree root anchor is achieved.
As shown in fig. 7, the pile seat 3 comprises a pile seat bottom plate 3-1 and steel-structure columns 3-2 vertically connected with the pile seat bottom plate 3-1, multiple groups of oblong holes for connection are annularly distributed in the pile seat bottom plate 3-1, each group of oblong holes for connection comprises a second oblong hole 3-3 for a root anchor 1 to pass through and a third oblong hole 3-4 matched with the first oblong hole 2-1-2, the oblong holes are fixed through T-shaped bolt fasteners 2-3, and the directions of the second oblong hole 3-3 and the third oblong hole 3-4 are scattered outwards.
The included angle between the angle of the root anchor 1 driven into the ground and the plane of the pile base bottom plate 3-1 of the pile base 3 is 30-60 degrees. The shape of the tree root is like a tree root inverted fork, so that a certain driving depth is ensured, and a certain barb anchoring length is also ensured.
The front section of the tree root anchor is a threaded end 1-1 with a helical blade, and the mode of tree root anchor construction is changed from a hammer-in mode to a screw-in mode by arranging the thread, so that the construction is more convenient and the process is more controllable.
The fixing clamp for connecting the root anchor 1 and the pile seat 3 consists of a left half clamp and a right half clamp which are symmetrical and a bolt fastener. The upper end of the clamp seat is provided with a wedge-shaped bulge 2-1-1, when the tree root anchor is fixed, the wedge-shaped bulges 2-1-1 of the left and right L-shaped half clamping plates 2-1 are inserted into the corresponding rectangular grooves 1-4 holes of the tree root anchor 1, and bolt fasteners 2-2 on two sides of the L-shaped half clamping plates are screwed down, so that the clamp is clamped, and the wedge-shaped bulges are firmly attached to the mounting holes of the tree root anchor. And finally, screwing down the T-shaped bolt fastener 2-3 for connecting the lower end of the clamp and the pile base to complete the connection of the root anchor and the pile base.
The upper end of the pile seat 3 is directly welded with a steel-structure upright post 3-2, and the form of the steel-structure upright post 3-2 can be adjusted according to the concrete specification of the steel-structure upright post; the bottom of the pile base is a pile base bottom plate 3-1; several groups of oblong holes for connection are annularly distributed on the pile seat bottom plate 3-1, the specific number of the groups can be adjusted according to actual requirements, and at least 3 groups are arranged; each group of the long round holes is provided with a large long round hole and two small long round holes, the large long round hole is used for penetrating a tree root anchor, the hole diameter is determined according to the size of the tree root anchor, and the small long round holes are used for penetrating a T-shaped bolt fastener connected with a fixing clamp; the direction of the long round hole is scattered outwards, so that the interference of the tree root anchor is avoided, and meanwhile, the construction of the tree root anchor is facilitated.
The front section of the root anchor is a threaded end, and the rear end of the root anchor is a circular steel tube anchor rod; the rear end circular tube anchor rod is provided with a plurality of circular holes 1-3 on the circumference of the circular tube body; anticorrosive coating (anticorrosive coating such as asphalt paint) is scribbled to the pipe, for avoiding the outer end anticorrosive coating to squeeze into underground in-process wearing and tearing at the root anchor, through the crimping technique, crimping one deck sheet iron is as the wearing and tearing protective layer, through in the protruding embedding pipe round hole with sheet iron extrusion, makes iron sheet and the pipe wall connection who scribbles anticorrosive coating firm, guarantees that the anticorrosive coating can not be damaged by the friction in the work progress, influences the durability of root anchor.
Those not described in detail in this specification are within the skill of the art.
Claims (7)
1. The utility model provides a root type resistance to plucking piling bar basis which characterized in that: comprises a tree root anchor (1) driven into the ground and a pile seat (3) on the ground; the plurality of root anchors (1) are fixed at the bottom of the pile seat (3) through fixing clamps (2);
the tree root anchor (1) comprises a front section part, a main body anchor rod (1-2) and a tail end, wherein the front section part is a threaded end (1-1) with a helical blade, the main body anchor rod (1-2) is a round steel pipe, a round hole (1-3) for crimping a wear protection layer is formed in the main body anchor rod (1-2), and a rectangular groove (1-4) for connecting with the fixing clamp (2) is formed in the tail end;
The fixing clamp (2) comprises two L-shaped half clamping plates (2-1), the two L-shaped half clamping plates (2-1) are symmetrically arranged relatively, the L-shaped half clamping plates (2-1) are provided with wedge-shaped protrusions (2-1-1) used for being matched with rectangular grooves (1-4) and connected with the pile base (3) to form first long round holes (2-1-2), the two L-shaped half clamping plates (2-1) are fixed through bolt fasteners (2-2), and the wedge-shaped protrusions (2-1-1) are located between the two L-shaped half clamping plates (2-1).
2. The tree-root type uplift steel pile foundation as claimed in claim 1, wherein: the main body anchor rod (1-2) is characterized in that the round steel pipe comprises an outermost layer, a middle layer and an inner layer, the outermost layer forms a wear protection layer (1-2-1) through compression joint, the middle layer is an anti-corrosion coating (1-2-2), and the inner layer is an inner pipe wall (1-2-3) of the round steel pipe.
3. The root type uplift steel pile foundation according to claim 2, wherein: the abrasion protection layer (1-2-1) is of an iron sheet structure.
4. The tree-root type uplift steel pile foundation as claimed in claim 1, wherein: the blade width of the thread of the threaded end (1-1) is 10-20mm, the thread pitch is set to be 20-40mm, and the long thread length is 200-300 mm.
5. The root type uplift steel pile foundation according to claim 1, wherein: the interval of each group of the round holes (1-3) is not more than 200mm, and not less than 3 round holes are formed in each group along the circumferential direction.
6. The tree-root type uplift steel pile foundation as claimed in claim 1, wherein: pile seat (3) include pile seat bottom plate (3-1) and with pile seat bottom plate (3-1) perpendicular steel structure stand (3-2) of being connected, ring distribution multiunit slotted hole for connection on pile seat bottom plate (3-1), every group connect with the slotted hole including be used for root anchor (1) pass second slotted hole (3-3) and be used for with first slotted hole (2-1-2) complex third slotted hole (3-4), the direction of second slotted hole (3-3) and third slotted hole (3-4) outwards scatters.
7. The root type uplift steel pile foundation according to claim 1 or 6, wherein: the included angle between the angle of the root anchor (1) driven into the ground and the plane of the pile base bottom plate of the pile base (3) is 30-60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110372867.XA CN113174987B (en) | 2021-04-07 | 2021-04-07 | Tree root type resistance to plucking piling bar basis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110372867.XA CN113174987B (en) | 2021-04-07 | 2021-04-07 | Tree root type resistance to plucking piling bar basis |
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| CN113174987A CN113174987A (en) | 2021-07-27 |
| CN113174987B true CN113174987B (en) | 2022-06-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113417280B (en) * | 2021-06-21 | 2022-06-28 | 武汉东研智慧设计研究院有限公司 | Anti-pulling steel pile and pile forming method |
| CN114059717A (en) * | 2021-09-08 | 2022-02-18 | 南通欧本建筑科技有限公司 | Column foot switch type combined column capable of reducing anchoring depth |
| GB2622912A (en) * | 2023-06-16 | 2024-04-03 | Francis & Lewis International Ltd | A foundation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010248762A (en) * | 2009-04-14 | 2010-11-04 | Shikoku Regional Development Bureau Ministry Of Land Infrastructure & Transport | Foundation pile and pile foundation structure |
| CN207017253U (en) * | 2017-07-05 | 2018-02-16 | 厦门金菲仕能源科技有限公司 | A kind of root pile |
| CN212027837U (en) * | 2020-04-30 | 2020-11-27 | 成都现代万通锚固技术有限公司 | Anti-corrosion anchor rod for anchoring support |
| CN212641500U (en) * | 2020-03-14 | 2021-03-02 | 南昌航空大学 | Assembled pile foundation component system of prefabricated building |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMO20120265A1 (en) * | 2012-10-31 | 2014-05-01 | Guido Bardelli | ANCHORING SYSTEM OF OBJECTS IN SOIL |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010248762A (en) * | 2009-04-14 | 2010-11-04 | Shikoku Regional Development Bureau Ministry Of Land Infrastructure & Transport | Foundation pile and pile foundation structure |
| CN207017253U (en) * | 2017-07-05 | 2018-02-16 | 厦门金菲仕能源科技有限公司 | A kind of root pile |
| CN212641500U (en) * | 2020-03-14 | 2021-03-02 | 南昌航空大学 | Assembled pile foundation component system of prefabricated building |
| CN212027837U (en) * | 2020-04-30 | 2020-11-27 | 成都现代万通锚固技术有限公司 | Anti-corrosion anchor rod for anchoring support |
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