CN113431075A - Herringbone pile anchor assembly type foundation suitable for low-voltage power transmission line - Google Patents
Herringbone pile anchor assembly type foundation suitable for low-voltage power transmission line Download PDFInfo
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- CN113431075A CN113431075A CN202110851781.5A CN202110851781A CN113431075A CN 113431075 A CN113431075 A CN 113431075A CN 202110851781 A CN202110851781 A CN 202110851781A CN 113431075 A CN113431075 A CN 113431075A
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- short pile
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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
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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
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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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
- E02D27/32—Foundations for special purposes
- E02D27/50—Anchored foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
- E02D5/526—Connection means between pile segments
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Foundations (AREA)
Abstract
本发明涉及一种适用于低压输电线路的人字形桩锚装配式基础，包括装配式短桩基础，所述装配式短桩基础的外侧设置有四个锚杆，所述装配式短桩基础包括顶节短桩和底节短桩，所述顶节短桩的底部设置有卯眼，所述底节短桩的顶部设置有榫头，顶节短桩和底节短桩通过卯眼和榫头连接固定；所述每个锚杆均在装配式短桩基础的外侧壁呈斜向下设置，所述锚杆包括锚筋和设置的锚筋外部的细石混凝土；本发明在装配式短桩基础的周围通过45度斜向下的锚杆基础组成了人字形的基础型式，该种基础可以通过锚杆抵抗基础的抗拔以及水平力，通过装配式短桩基础抵抗基础的下压力，该基础型式核心为装配式的短桩基础，可大大的减少基础开挖的面积，提高基础的水保效益。
The invention relates to a herringbone pile-anchor assembled foundation suitable for low-voltage transmission lines, including an assembled short pile foundation, four anchor rods are arranged on the outer side of the assembled short pile foundation, and the assembled short pile foundation includes The top section short pile and the bottom section short pile, the bottom section of the top section short pile is provided with a mortise, the top section of the bottom section short pile is provided with a tenon, and the top section short pile and the bottom section short pile are connected by the socket eye and the tenon Fixing; each anchor rod is arranged obliquely downward on the outer side wall of the prefabricated short pile foundation, and the anchor rod includes the anchor bar and the fine stone concrete outside the set anchor bar; the present invention is used in the prefabricated short pile foundation. A herringbone foundation type is formed around the 45-degree inclined downward anchor bolt foundation. This kind of foundation can resist the pull-out and horizontal force of the foundation through the bolt, and resist the down pressure of the foundation through the assembled short pile foundation. The core of the type is an assembled short pile foundation, which can greatly reduce the area of foundation excavation and improve the soil and water conservation benefits of the foundation.
Description
Technical Field
The invention relates to a herringbone pile anchor assembly type foundation applicable to a low-voltage power transmission line, which is applied to the technical field of power transmission lines.
Background
In order to develop mechanical construction of the foundation, more and more foundation types are used as assembly type foundations, and in order to meet the requirements of uplift resistance, pressing-down resistance and horizontal bearing capacity of the foundation, the existing mountain assembly type foundations mainly adopt large-excavation plate type assembly type foundations, the area of original state soil excavation can be increased in a large area through the foundation types, large-area large excavation of the original state soil and the water conservation problem of a tower foundation are caused, and the difficulty of water conservation measures is increased.
Disclosure of Invention
In order to solve the technical problems, the invention provides the herringbone pile anchor assembly type foundation suitable for the low-voltage transmission line, which can effectively reduce the excavation area of original soil of the foundation and reduce the difficulty of water conservation measures.
The technical scheme of the invention is as follows:
a herringbone pile anchor assembly type foundation suitable for a low-voltage transmission line comprises an assembly type short pile foundation, wherein four anchor rods are arranged on the outer side of the assembly type short pile foundation, the assembly type short pile foundation comprises a top section short pile and a bottom section short pile, a mortise is arranged at the bottom of the top section short pile, a tenon is arranged at the top of the bottom section short pile, and the top section short pile and the bottom section short pile are connected and fixed through the mortise and the tenon; every stock all is the slant and sets up at the lateral wall on assembled stub basis, the stock includes the outside pea gravel concreten of anchor bar and the anchor bar that sets up.
The included angles between the anchor bars and the center of the tower are +/-45 degrees and +/-135 degrees respectively, and the inclination of the anchor rods in the vertical direction is 35-45 degrees.
The top section stub is of a prefabricated square reinforced concrete structure, an anchor rod preformed hole matched with the anchor rod is formed in the top section stub, and first bearing parts are arranged on four side wall surfaces of the top section stub.
The center of the top surface of the top section short pile is provided with an inward concave mortise.
The inside first stub owner muscle of a plurality of that is provided with of top festival stub, first stub owner muscle is along the peripheral equidistance distribution of top festival stub, and the outside of first stub owner muscle sets up first stub stirrup, and the inside of every first bearing portion all is provided with first bracket reinforcing bar net piece, is provided with first connection strengthening rib in the mortise, and first connection strengthening rib outside sets up first connection stirrup.
A first preformed hole is further formed in the top section stub, and a first reinforcing steel bar mesh is arranged outside the first preformed hole.
The bottom section stub is of a prefabricated square reinforced concrete structure, an anchor rod preformed hole matched with the anchor rod is formed in the bottom section stub, and second bearing parts are arranged on four side wall surfaces of the bottom section stub.
The center of the top face of the bottom section stub is integrally connected with a tenon matched with the mortise, a second preformed hole matched with the first preformed hole is formed in the tenon, and a second reinforcing steel bar net piece is arranged outside the second preformed hole.
The inside a plurality of second stub owner muscle that is provided with of end section stub, the peripheral equidistance distribution of second stub owner muscle along end section stub, the outside of second stub owner muscle sets up second stub stirrup, and the inside of every second bearing portion all is provided with second bracket reinforcing bar net piece, is provided with the second in the tenon and connects the strengthening rib, and the second is connected the strengthening rib outside and is set up the second and connect the stirrup.
A construction method of a herringbone pile anchor assembly type foundation suitable for a low-voltage power transmission line comprises the following specific steps:
s1, construction preparation, namely, producing the prefabricated short pile foundation according to the design requirement, and paying attention to the fact that anchor rod preformed holes in different directions need to be staggered in the production process so as to avoid conflict between the horizontal direction and the vertical direction;
s2, transporting the prefabricated short pile foundation, anchor bars and other materials to the site, keeping the site flat, and carrying out surface soil stripping work in the area to be excavated with the stripping thickness of 10 cm;
s3, excavating a base plane of a soil layer and a rock stratum according to the designed gradient, wherein the size d of the base in the horizontal direction is 20mm larger than the side of the assembly type short pile base (one side is 10mm), and then excavating vertically to the designed depth;
s4, placing the bottom section stub into the hole by using a hoisting device, aligning and assembling the mortise of the top section stub and the tenon at the top of the bottom section stub, penetrating the first preformed hole and the second preformed hole by using a bolt, and further screwing and fixing the bolt to a designed torque;
s5: positioning the anchor bars at the positions and angles through anchor bar preformed holes, drilling holes at the given positions and angles, and strictly ensuring the drilling positions and the drilling angles;
s6, lowering the anchor rods through the anchor rod preformed holes, and fixing the anchor rods on the first bracket reinforcing steel bar mesh sheet and the second bracket reinforcing steel bar mesh sheet respectively through bolts;
s7, pouring fine stone concrete to complete the construction of the anchor rod part;
and S8, pouring cement mortar into the gap between the assembled stub foundation and the rock mass, recovering the upper soil body, and performing surface soil recovery when the soil reaches the ground surface by 10 cm.
The invention has the following beneficial effects:
1. the invention provides a novel herringbone pile anchor assembly type foundation structure, which consists of two parts, wherein the center of the assembly type foundation is an assembly type short pile foundation with a rock embedding section, the periphery of the assembly type short pile foundation is an anchor rod foundation with 45-degree inclined downward, the downward pressing bearing capacity of an iron tower is borne by the assembly type short pile foundation, the upward pulling bearing capacity and the horizontal bearing capacity are borne by the anchor rods, and the foundation type can reduce the excavation area of original state soil of the foundation and reduce the difficulty of water conservation measures; assuming a 110kV double-circuit line, the buried depth of a general fabricated plate type foundation is 2.5, the width of a substrate is 3m, the volume of a soil body to be excavated according to excavation of one foundation at 45 degrees is about 45 cubic meters, and the surface soil stripping area is 64 square meters. If the foundation type is adopted, the pile diameter is about 1m, the earth volume excavation is about 18 cubic meters, 60% is saved for the assembled plate type foundation, the surface soil stripping area is 25 square meters, and the foundation type has great environmental benefit compared with the assembled plate type foundation, and the foundation type saves 60%.
2. By utilizing the exposed detailed structure of the main reinforcement, the connection strength of the anchor rod and the precast concrete pile is improved, the precast concrete pile is overlapped by adopting the steel bars, and the steel bars at the connection part are connected in an encrypted manner, so that the strength requirement of the connection part is ensured.
3. The top section stub and the bottom section stub provided by the invention are connected by adopting a mortise and tenon structure, so that the field assembly of an assembled pile foundation is facilitated, large-scale equipment is not required, and the construction is convenient and efficient.
4. The invention provides a novel construction method of an assembly type foundation, which comprises three stages of assembly type pile foundation construction, anchor rod construction and connection of two foundations, and is convenient for implementation and application of the foundation type.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a connecting structure of a top section stub and a bottom section stub of the present invention;
FIG. 3 is a schematic structural view of the anchor rod of the present invention;
FIG. 4 is a schematic top view of the anchor rod and fabricated spud foundation of the present invention;
FIG. 5 is a side cross-sectional view of a top section spud according to the invention;
FIG. 6 is a top cross-sectional view of a top section spud according to the invention;
FIG. 7 is a schematic diagram of the position structure of the first preformed hole according to the present invention;
FIG. 8 is a schematic structural view of a stub of the present invention;
FIG. 9 is a side cross-sectional view of a bottom section spud according to the present invention;
FIG. 10 is a schematic diagram of the second preformed hole according to the present invention;
the reference numbers in the figures denote:
1. an assembled stub foundation; 2. an anchor rod; 3. jacking short piles; 4. bottom section short piles; 8. a first pressure-receiving portion; 9. reserving a hole in the anchor rod; 10. b, mortise drilling; 12. a first stub main reinforcement; 13. a first connecting reinforcing rib; 14. a first stub stirrup; 15. a first bracket steel mesh sheet; 17. a first preformed hole; 18. a first reinforcing mesh sheet; 19. a tenon; 20. a second stub main reinforcement; 21. a second stub stirrup; 22. a second bracket reinforcing mesh sheet; 23. a second connecting reinforcing rib; 24. a second connector stirrup; 25. a second preformed hole; 26. a second reinforcing mesh sheet; 27. anchoring ribs; 28. fine stone concrete; 29. and a second bearing part.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
The herringbone pile-anchor assembly type foundation suitable for the low-voltage transmission line comprises an assembly type short pile foundation 1, wherein four anchor rods 2 are arranged on the outer side of the assembly type short pile foundation 1, the assembly type short pile foundation 1 comprises a top section short pile 3 and a bottom section short pile 4, a mortise 10 is arranged at the bottom of the top section short pile 3, a tenon 19 is arranged at the top of the bottom section short pile 4, and the top section short pile 3 and the bottom section short pile 4 are fixedly connected through the mortise 10 and the tenon 19; every stock 2 all is the slant and sets up at the lateral wall of assembled stub basis 1, stock 2 includes anchor bar 27 and the outside pea gravel concret 28 of anchor bar 27 that sets up.
The included angles between the anchor bars 27 and the center of the tower are +/-45 degrees and +/-135 degrees respectively, and the inclination of the anchor rod 2 in the vertical direction is 35-45 degrees.
The top section stub 3 is of a prefabricated square reinforced concrete structure, the top section stub 3 is provided with an anchor rod preformed hole 9 matched with the anchor rod 2, and four side wall surfaces of the top section stub 3 are provided with first bearing parts 8.
The center of the top surface of the top section stub 3 is provided with an inward concave mortise 10.
The inside first stub owner muscle 12 that is provided with a plurality of top festival stub 3, first stub owner muscle 12 distributes along the peripheral equidistance of top festival stub 3, and the outside of first stub owner muscle 12 sets up first stub stirrup 14, and every first bearing portion 8's inside all is provided with first bracket reinforcing bar net piece 15, is provided with first connection strengthening rib 13 in the mortise 10, and first connection strengthening rib 13 outside sets up first connection stirrup.
A first preformed hole 17 is further formed in the top section stub 3, and a first reinforcing steel bar net piece 18 is arranged outside the first preformed hole 17.
The bottom section stub 4 is of a prefabricated square reinforced concrete structure, the anchor rod preformed hole 9 matched with the anchor rod 2 is formed in the bottom section stub 4, and second bearing parts 29 are arranged on four side wall surfaces of the bottom section stub 4.
The center of 4 top faces of bottom section stub is integrative to be connected with the tenon 19 with mortise 10 looks adaptation, offer the second preformed hole 25 with first preformed hole 17 looks adaptation on the tenon 19, the outside of second preformed hole 25 is provided with second reinforcing bar net piece 26.
Bottom segment stub 4 is inside to be provided with a plurality of second stub owner muscle 20, second stub owner muscle 20 distributes along the peripheral equidistance of bottom segment stub 4, and the outside of second stub owner muscle 20 sets up second stub stirrup 21, and the inside of every second bearing portion 29 all is provided with second bracket reinforcing bar net piece 22, is provided with second connection strengthening rib 23 in the tenon 19, and second connection strengthening rib 23 outside sets up second connection stirrup 24.
A construction method of a herringbone pile anchor assembly type foundation suitable for a low-voltage power transmission line comprises the following specific steps:
s1, construction preparation, namely, producing the prefabricated short pile foundation 1 according to design requirements, wherein the anchor rod preformed holes 9 in different directions need to be staggered in the production process so as to avoid conflict between the horizontal direction and the vertical direction;
s2, transporting the prefabricated assembly type short pile foundation 1, the anchor bars 27 and other materials to the site, keeping the site flat, and carrying out surface soil stripping work in the area to be excavated, wherein the stripping thickness is 10 cm;
s3, excavating a base plane of a soil layer and a rock stratum according to the designed gradient, wherein the size d of the base in the horizontal direction is 20mm (one side is 10mm) larger than the side 1 of the assembly type short pile foundation, and then excavating vertically to the designed depth;
s4, placing the bottom section stub 4 into the hole by using a hoisting device, aligning and assembling the mortise 10 of the top section stub 3 and the tenon 19 at the top of the bottom section stub 4, penetrating a bolt through the first reserved hole 17 and the second reserved hole 25, and further screwing the bolt to a designed torque;
s5: positioning the anchor bars 27 at the positions and angles of the anchor bars 27 through the anchor rod preformed holes 9, and drilling holes at the given positions and angles, wherein the drilling positions and the drilling angles need to be strictly ensured;
s6, lowering the anchor rod 2 through the anchor rod preformed hole 9, and fixing the anchor rod 2 on the first bracket reinforcing mesh sheet 15 and the second bracket reinforcing mesh sheet 22 through bolts respectively;
s7, pouring fine stone concrete 28 to complete the construction of the anchor rod 2;
and S8, pouring cement mortar into the gap between the assembled stub foundation 1 and the rock mass, recovering the upper soil body, and performing surface soil recovery when the soil reaches the ground surface by 10 cm.
The middle of the structure of the invention is an assembly type short pile foundation partially embedded with rock, the periphery of the assembly type short pile foundation forms a herringbone foundation type through an anchor rod foundation inclined downwards at 45 degrees, the foundation can resist the pulling resistance and horizontal force of the foundation through the anchor rod, the downward pressure of the foundation is resisted through the assembly type short pile foundation, and as the core of the foundation type is the assembly type short pile foundation, the foundation excavation area can be greatly reduced, and the water conservation benefit of the foundation is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110851781.5A CN113431075A (en) | 2021-07-27 | 2021-07-27 | Herringbone pile anchor assembly type foundation suitable for low-voltage power transmission line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110851781.5A CN113431075A (en) | 2021-07-27 | 2021-07-27 | Herringbone pile anchor assembly type foundation suitable for low-voltage power transmission line |
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| CN113431075A true CN113431075A (en) | 2021-09-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220042273A1 (en) * | 2020-07-14 | 2022-02-10 | Mark Anthony S. Dimitrijevic | Structural support and stabilization assemblies and methods for installing same |
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| US6665990B1 (en) * | 2000-03-06 | 2003-12-23 | Barr Engineering Co. | High-tension high-compression foundation for tower structures |
| CN101691759A (en) * | 2009-09-04 | 2010-04-07 | 中国电力工程顾问集团东北电力设计院 | Construction method for digging composite environmental protection base of anchorage bar adding rock |
| CN204780975U (en) * | 2015-06-30 | 2015-11-18 | 丽水市正阳电力设计院有限公司 | A four return circuit terminal steel pipe poles are drawn and are dug compound basis of anchor log for medium voltage electric distribution circuit |
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Application publication date: 20210924 |