CN111705787A - Enhancement mode resistance to plucking tubular pile welded connection connects - Google Patents
Enhancement mode resistance to plucking tubular pile welded connection connects Download PDFInfo
- Publication number
- CN111705787A CN111705787A CN202010668296.XA CN202010668296A CN111705787A CN 111705787 A CN111705787 A CN 111705787A CN 202010668296 A CN202010668296 A CN 202010668296A CN 111705787 A CN111705787 A CN 111705787A
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- Prior art keywords
- tension
- end plate
- hoop
- welded
- tubular pile
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 20
- 239000011513 prestressed concrete Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000009417 prefabrication Methods 0.000 abstract description 2
- 238000004873 anchoring Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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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
-
- 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
-
- 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
- E02D5/58—Prestressed concrete piles
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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)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to a welding connection joint of an enhanced uplift pipe pile in the field of construction engineering pile foundations. The technical scheme is as follows: the end part of the tubular pile is provided with a tension end plate, a longitudinal prestress main rib is arranged in the tubular pile, the prestress main rib is welded with the tension end plate, and a tension hoop is vertically welded with the tension end plate and sleeved on the tube wall of the tubular pile; longitudinal connecting short steel bars are arranged in the tubular pile, the connecting short steel bars and the prestressed main steel bars are arranged in a staggered mode, and one end of each connecting short steel bar is welded with the tension end plate; the tubular pile of the upper section and the tubular pile of the lower section are welded and fixed through respective tension end plates, and the connecting blocks are welded on the tension hoop of the upper section and the tension hoop of the lower section around the joint of the upper tension end plate and the lower tension end plate. The joint has the advantages of reliable quality, reasonable stress, convenience for factory prefabrication and capability of enhancing the connection performance between two sections of pipe piles.
Description
Technical Field
The invention belongs to the field of construction engineering pile foundations, and particularly relates to a tubular pile joint structure.
Background
The prestressed concrete pipe pile has the advantages of high single pile bearing capacity, convenient construction, reliable quality, low cost and the like, and is widely applied to foundation engineering of buildings. When the pipe pile is used as a uplift pile, the quality of the pre-stress of the prestressed reinforcement and the quality of the connecting joint are generally controlled. At present, according to the tubular pile products in the current national standard drawing set 'prestressed concrete tubular pile' 10G409, the prestressed tubular pile only transmits force to concrete through the anchoring holes and the prestressed reinforcements arranged on the end plate, and because the thickness of the end plate at the anchoring holes is small, the phenomenon of stress concentration and shear failure is easily generated at the anchoring holes, even the integral failure of the connecting end plate is possibly caused, and the bearing performance of the pile body is restricted. In addition, the prestressed pipe piles are generally connected by welding joint end plates, the wall thickness of a hoop at the end part of each pipe pile is only 1.5 mm-2.3 mm, the thickness of each pipe pile is small, the pipe piles are only used as structures and cannot play a role in transferring tension, the force borne by the previous pile can be transferred to the next pile only through the end plates, the requirement on the professional technical level of electric welding is very high, and the welding quality of the joint of the end plates often determines the quality of the whole uplift pipe pile. Due to the existence of the two factors, the application of the uplift pipe pile in engineering construction is limited.
Disclosure of Invention
In order to solve the technical problems, the invention provides an enhanced uplift pipe pile welding connection joint which is reliable in quality, reasonable in stress, convenient for factory prefabrication and capable of enhancing the connection performance between two sections of pipe piles.
The technical scheme of the invention is as follows: a welding connection joint of a reinforced uplift pipe pile is characterized in that a tension end plate is arranged at the end part of the pipe pile, a longitudinal prestress main rib is arranged in the pipe pile, the prestress main rib is welded with the tension end plate, a tension hoop is vertically welded with the tension end plate, and the tension hoop is sleeved on the pipe wall of the pipe pile; longitudinal connecting short steel bars are arranged in the tubular pile, the connecting short steel bars and the prestressed main steel bars are arranged in a staggered mode, and one end of each connecting short steel bar is welded with the tension end plate; the tubular pile of the upper section and the tubular pile of the lower section are welded and fixed through respective tension end plates, and the connecting blocks are welded on the tension hoop of the upper section and the tension hoop of the lower section around the joint of the upper tension end plate and the lower tension end plate.
Based on the technical characteristics: the welding of one end of the connection stub to the tension end plate is replaced with the welding of the connection stub to the inner wall of the tension hoop.
Based on the technical characteristics: the tension hoop is embedded into the tubular pile, and the outer wall of the tension hoop is flush with the outer wall of the tubular pile.
Based on the technical characteristics: the tension end plate, the tension hoop and the connecting short steel bar of the single-section tubular pile are connected through welding, and an integrated structure is prefabricated for a factory.
Based on the technical characteristics: the number of the connecting blocks is 4-6, and the connecting blocks are uniformly arranged and welded on an upper section of tension hoop and a lower section of tension hoop at the periphery of the connection position of the upper tension end plate and the lower tension end plate.
In the technical scheme, the tension end plate and the tension hoop participate in the stress of the tubular pile, the thickness calculation of the tension end plate and the tension hoop considers the tension of the steel pipe, and the specific thickness can be determined according to actual calculation. In the general prior art, as a tubular pile end plate specified in the current national standard drawing set 'prestressed concrete tubular pile' 10G409 is 20mm to 25mm thick, the thickness of the end plate at an anchoring hole is small, and the end plate becomes a weak node of a bearing position and is not beneficial to tension; the pipe pile hoop specified in the current national standard drawing set 'prestressed concrete pipe pile' 10G409 is 1.5 mm-2.3 mm thick and small in thickness, and can not play a role in transferring tension only by being used as a structure. In the technical scheme, the end plate and the hoop need to be thickened to form a system combining the reinforced tension end plate and the tension hoop, the factors such as stress, economic cost and the like are considered, and the thickness of the tension end plate is increased by 3mm to 5mm on the thickness of the end plate of a pipe pile product in 10G409 of the State Standard atlas of prestressed concrete pipe piles; the tension hoops are preferably 10mm to 12mm thick.
On the basis of the prior art, the novel stress system can be formed by jointly stressing the tension end plate, the tension hoop, the additionally arranged connecting block and the connecting short steel bar, the reinforced uplift pipe pile welding connecting joint for improving the bearing performance of the uplift pipe pile has strong practical significance.
Compared with the prior art, the technical scheme effectively strengthens the welding connection joint of the uplift pipe pile, considers the tension performance of the end plate in a force transmission way, and can play an irreplaceable role in pre-stressed steel bars, tension hoop bars, connecting blocks and connecting short steel bars. The invention has simple principle, reasonable stress and convenient construction, and can be prefabricated and processed in factories and welded on site. Can be widely applied to pile foundations adopted by buildings for bearing uplift loads.
Drawings
Fig. 1 is a schematic side view of an enhanced uplift pile welded connection joint according to the invention.
Fig. 2 is a schematic top view of the reinforced uplift pile welded joint according to the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 and 2: the reinforced uplift pipe pile connecting joint comprises a tension end plate 3, a tension hoop 5, a connecting short steel bar 7 and a connecting block 8; the tension hoop 5 is vertically welded with a tension end plate 3 of the tubular pile; longitudinal steel bars are arranged in the tubular pile and comprise a prestressed main bar 6 and a connecting short steel bar 7; the connecting short reinforcing steel bars 7 and the prestressed main reinforcing steel bars 6 are arranged in a staggered mode. The tension hoop 5 is embedded into the pipe pile, and the outer wall of the tension hoop 5 is flush with the outer wall of the pipe pile.
The upper section of tubular pile 1 and the lower section of tubular pile 2 are welded and fixed through respective tension end plates, and the circumferential weld seam 4 at the joint is required to be the same as the weld seam requirement of a common tubular pile in the prior art; the connecting block 8 is welded on the tension hoop 5 around the pipe pile connecting position.
The connecting short bars 7 are connected to the tension end plate 3 and can be welded to the inner wall of the tension hoop 5. The tension end plate 3, the tension hoop 5 and the connecting short steel bar 7 are welded into a whole when being prefabricated in a factory, and the tension end plate, the tension hoop 5 and the connecting short steel bar are used as a part of the prestressed concrete pipe pile and play a role together with the prestressed main steel bar 6.
In construction, an upper section of pipe pile 1 and a lower section of pipe pile 2 are firstly connected through a circumferential weld joint at a tension end plate 3; and then, the additionally arranged connecting blocks 8 are uniformly welded on the tensile hoop 5 at the periphery of the tubular pile connecting position, and the height of the welding seam is more than or equal to 8 mm. The connecting blocks 8 and the tension end plates 3 cooperate together to transmit the pulling resistance from the upper section of tubular pile 1 to the lower section of tubular pile 2, the specific number of the connecting blocks 8 can be determined by calculation according to the pulling resistance bearing capacity of a single pile, and generally 4-6 blocks are uniformly welded on the tension hoop at the periphery of the tubular pile joint, namely the upper section of tension hoop and the lower section of tension hoop at the periphery of the joint of the upper and lower tension end plates.
As described in detail above for the embodiments of the present invention, those skilled in the art can change the embodiments and applications of the embodiments of the present invention, such as the thickness of the tension hoop, the width of the end plate, or the length of the short steel bar. The connecting short steel bars can be connected with the tension hoop in a welding or overlapping mode. The size of the connecting block can be adjusted during production and processing according to actual conditions.
In summary, the content of the present specification should not be construed as limiting the present invention, and any modification made according to the design concept of the present invention is within the scope of the present invention.
Claims (6)
1. A welding connection joint of a reinforced uplift pipe pile is characterized in that a tension end plate (3) is arranged at the end part of the pipe pile, a longitudinal prestress main rib (6) is arranged in the pipe pile, the prestress main rib (6) is welded with the tension end plate (3), a tension hoop (5) is vertically welded with the tension end plate (3) and sleeved on the pipe wall of the pipe pile; longitudinal connecting short steel bars (7) are arranged in the tubular pile, the connecting short steel bars (7) and the prestressed main steel bars (6) are arranged in a staggered mode, and one end of each connecting short steel bar (7) is welded with the tension end plate (3); the upper segment the tubular pile with the lower segment the tubular pile is through respective draw end plate (3) welded fastening, connecting block (8) welding two from top to bottom draw the upper segment all around of end plate (3) junction draw hoop (5) and lower segment draw on the hoop (5).
2. The reinforced uplift pipe pile welding connection joint as claimed in claim 1, wherein: one end of the connecting short steel bar (7) is welded with the tension end plate (3) instead of the connecting short steel bar (7) is welded on the inner wall of the tension hoop (5).
3. The reinforced uplift pipe pile welding connection joint as claimed in claim 1 or 2, wherein: the tension hoop (5) is embedded into the tubular pile, and the outer wall of the tension hoop (5) is flush with the outer wall of the tubular pile.
4. An enhanced uplift pipe pile welding connection joint as claimed in claim 1 or 2, wherein; the single section tubular pile be drawn end plate (3) draw hoop (5) with connect between short reinforcing bar (7) all through welded connection, for the prefabricated integral structure of mill.
5. The reinforced uplift pipe pile welding connection joint as claimed in claim 1 or 2, wherein: the number of the connecting blocks (8) is 4-6, and the connecting blocks are uniformly arranged and welded on the upper section of the tension hoop (5) and the lower section of the tension hoop (5) at the periphery of the connection position of the upper tension end plate and the lower tension end plate (3).
6. The reinforced uplift pipe pile welding connection joint as claimed in claim 1 or 2, wherein: the tension end plate (3) is thickened, and the thickness of the end plate of a tubular pile product specified in the current national standard drawing of prestressed concrete tubular piles (10G 409) is increased by 3mm to 5 mm; the tensile hoop (5) is thickened, and the thickness of the hoop of a tubular pile product specified in the current national standard atlas, prestressed concrete tubular pile (10G 409) is increased to be 10mm to 12mm on the basis that the thickness of the hoop is 1.5mm to 2.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010668296.XA CN111705787A (en) | 2020-07-13 | 2020-07-13 | Enhancement mode resistance to plucking tubular pile welded connection connects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010668296.XA CN111705787A (en) | 2020-07-13 | 2020-07-13 | Enhancement mode resistance to plucking tubular pile welded connection connects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111705787A true CN111705787A (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010668296.XA Pending CN111705787A (en) | 2020-07-13 | 2020-07-13 | Enhancement mode resistance to plucking tubular pile welded connection connects |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111705787A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112695744A (en) * | 2021-01-26 | 2021-04-23 | 温州大学 | Tubular pile splicing equipment and construction method thereof |
| CN114718059A (en) * | 2022-05-05 | 2022-07-08 | 广州建筑股份有限公司 | Tubular pile connecting structure and pile splicing method thereof |
-
2020
- 2020-07-13 CN CN202010668296.XA patent/CN111705787A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112695744A (en) * | 2021-01-26 | 2021-04-23 | 温州大学 | Tubular pile splicing equipment and construction method thereof |
| CN114718059A (en) * | 2022-05-05 | 2022-07-08 | 广州建筑股份有限公司 | Tubular pile connecting structure and pile splicing method thereof |
| CN114718059B (en) * | 2022-05-05 | 2023-03-21 | 广州建筑股份有限公司 | Tubular pile connecting structure and pile splicing method thereof |
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