CN116378014A - Bending shear member and process based on combined prestress square pile - Google Patents
Bending shear member and process based on combined prestress square pile Download PDFInfo
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- CN116378014A CN116378014A CN202310181758.9A CN202310181758A CN116378014A CN 116378014 A CN116378014 A CN 116378014A CN 202310181758 A CN202310181758 A CN 202310181758A CN 116378014 A CN116378014 A CN 116378014A
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- 238000005452 bending Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 18
- 239000003822 epoxy resin Substances 0.000 claims abstract description 17
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000011513 prestressed concrete Substances 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 8
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 239000011150 reinforced concrete Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 8
- 239000011229 interlayer Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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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
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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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 provides a bending shear member based on a combined prestress square pile and a process thereof, belonging to the technical field of building construction. The technical proposal is as follows: the bending shear member based on the combined prestress square pile is characterized by comprising a plurality of hollow square piles which are arranged in a matrix, wherein the Fang Zhuangkong of the hollow square piles are filled with high-strength mortar; the shear steel bars are circumferentially and uniformly distributed in the square pile holes and penetrate through the high-strength mortar; the working surfaces of the adjacent hollow square piles are bonded through epoxy resin. The beneficial effects of the invention are as follows: the problem that when the prestressed concrete square piles are used for making the bent shearing members, the combined connection of the prestressed square piles and the local stress reinforcement of the structure are effectively solved, the good compression and tension performance of the prestressed concrete square piles is fully utilized, the structure is convenient, the construction quality and the construction efficiency are improved, the heavy prestressed reinforced concrete structure is changed into a light assembly type structure, and the prestressed reinforced concrete structure has extremely high social significance for the standardization, the intensification and the industrialization of the members.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a bending shear member based on a combined prestress square pile and a process.
Background
Along with the continuous development of the concrete precast pile industry, the product specifications of the concrete precast piles in China are increasingly rich, and the collocation is more reasonable. The prestressed concrete square pile is one of the common types, and the currently domestic common square pile type is mainly divided into a pretensioned prestressed centrifugal concrete hollow square pile and a pretensioned prestressed concrete solid square pile, and the advantages and disadvantages of different pile types are different.
The pretensioned prestressed centrifugal concrete hollow square pile is manufactured by adopting a pretensioned prestressing process and a concrete centrifugal forming method, and is a hollow pile with a section form of an outer square and an inner round. The method has the characteristics of good shearing resistance of the concrete solid square pile and large side friction resistance of the soil body, and simultaneously inherits the advantages of high concrete strength grade, low material cost and the like of the concrete tubular pile. But as the bending shear member, the prestressed concrete square pile is only used for foundation construction at present, has single action, and provides a bending shear member and a process based on the combined type prestressed square pile for further popularization of application of the prestressed concrete square pile.
Disclosure of Invention
The invention aims to provide a bending shear member based on a combined prestress square pile and a process.
The invention is realized by the following measures: the bending shear member based on the combined prestress square pile is characterized by comprising a plurality of hollow square piles which are arranged in a matrix, wherein the Fang Zhuangkong of the hollow square piles are filled with high-strength mortar; the hollow square pile is a C60 prestressed concrete hollow square pile with the thickness of 400mm multiplied by 400 mm.
The shear steel bars are circumferentially and uniformly distributed in the square pile holes and penetrate through the high-strength mortar, and the vertical shear capacity of the overall structure of the square pile group is improved. The shear steel bars are generally circumferentially and uniformly distributed with four, and the specific number is determined according to actual conditions.
The working surfaces of adjacent hollow square piles are bonded by epoxy resin, and a certain number of square piles are combined into a square pile group to be used as a bending shear member. The square pile group is generally formed by nxm hollow square piles, preferably n and m are the same, for example, 3x3, 4x4, etc.
The number of the longitudinal hollow square piles is greater than three, and horizontal ropes are arranged in all square pile holes of all the hollow square piles at the outermost layers of the two longitudinal ends in a penetrating mode, and are concentrically arranged in the square pile holes.
And a plurality of failure sections are arranged on the horizontal cable. Part of the prestressed horizontal cable is wrapped with the interlayer or the sleeve to separate from the mortar, so that the mortar does not generate larger inverted arch, and the member can better resist dead weight and load. The length of the failure section can be calculated according to the stress of the actual components on site and the construction supporting constraint condition, and the length of the prestress failure section is determined according to the tension and compression condition of the components.
The horizontal cable is composed of 5 high-strength steel strands with the diameter of 15.24 mm.
The epoxy resin is 50MPa epoxy resin, and the high-strength mortar is C60 high-strength mortar.
The shear steel bar adopts HRB400 steel bar with the diameter of 32 mm.
The positions of the failure sections in the square piles are different.
Two vertically adjacent hollow square piles are connected through a connecting piece, the connecting piece comprises a bolt steel pipe which is poured at one end inside the hollow square pile, and the outer end of the bolt steel pipe extends out of the hollow square pile; the other end is reserved with a steel pipe slot matched with the bolt steel pipe;
a plurality of inserted bars are symmetrically arranged on the hollow square pile and close to one end of the bolt steel pipe, and inserted bar slots matched with the inserted bars are arranged at the other end of the hollow square pile;
the bolt steel pipes of two adjacent hollow square piles are matched with the steel pipe slots, and a connecting steel plate is arranged between the two hollow square piles and sleeved on the bolt steel pipes.
A process for bending shear members based on combined prestress square piles is characterized in that shear steel bars are arranged in a penetrating mode, then horizontal ropes are arranged through a pretensioning method, and when the horizontal ropes are tensioned, internal grouting treatment is carried out on pile holes;
and when the grouting strength is 80% greater than the design strength, carrying out the tension releasing treatment on the horizontal cable.
Before setting up the shear steel bar, it is necessary to ensure that the bonding strength of the epoxy resin reaches 100% of the square pile strength or to bond and install the shear steel bar by the epoxy resin after the grouting strength is 80% greater than the design strength.
The beneficial effects of the invention are as follows: the problem that when the prestressed concrete square piles are used for making the bent shearing members, the combined connection of the prestressed square piles and the local stress reinforcement of the structure are effectively solved, the good compression and tension performance of the prestressed concrete square piles is fully utilized, the structure is convenient, the construction quality and the construction efficiency are improved, the heavy prestressed reinforced concrete structure is changed into a light assembly type structure, and the prestressed reinforced concrete structure has extremely high social significance for the standardization, the intensification and the industrialization of the members.
Drawings
FIG. 1 is a sectional construction view of a combined prestress square pile structure;
FIG. 2 is a schematic vertical section view of a combined prestress square pile structure;
FIG. 3 is a schematic structural view of a connector;
wherein, the reference numerals are as follows: 1. a horizontal cable; 2. hollow square piles; 3. an epoxy resin; 4. shear steel bars; 5. mortar; 6. a failure section; 7. a bolt steel pipe; 8. a rod; 9. a steel pipe slot; 10. a rod inserting slot; 11. and connecting the steel plates.
Detailed Description
In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.
Embodiment one:
referring to fig. 1-2, a bending shear member based on combined prestress square piles comprises a plurality of hollow square piles 2 arranged in a matrix, and square pile holes of the hollow square piles 2 are filled with high-strength mortar 5; the hollow square pile 2 is a C60 prestressed concrete hollow square pile 2 with the thickness of 400mm multiplied by 400 mm.
The shear steel bars 4 are circumferentially and uniformly distributed in the square pile holes and penetrate through the high-strength mortar 5, and the vertical shear capacity of the overall structure of the square pile group is improved.
The working surfaces of the adjacent hollow square piles 2 are bonded through epoxy resin 3, and a certain number of square piles are combined into square pile groups to be used as bending shear members. The hollow square piles 2 are typically nxm to form square pile groups, preferably n and m are the same, for example 3x3, 4x4, etc.
The number of the longitudinal hollow square piles 2 is greater than three, and horizontal ropes 1 are arranged in all square pile holes of all the hollow square piles 2 positioned on the outermost layers of the two longitudinal ends in a penetrating mode, and the horizontal ropes 1 are concentrically arranged in the square pile holes.
A plurality of failure sections 6 are arranged on the horizontal cable 1. Part of the prestressed horizontal cable 1 is wrapped with a interlayer or a sleeve to separate from the mortar 5, so that no larger arch is generated, and the member can resist dead weight and load better. The length of the failure section 6 can be calculated according to the stress of the actual components on site and the construction supporting constraint condition, and the length of the prestress failure section 6 is determined according to the tension and compression condition of the components.
The horizontal cable 1 is formed by 5 high-strength steel strands with phi of 15.24 mm.
The epoxy resin 3 is 50MPa of epoxy resin 3, and the high-strength mortar 5 is C60 high-strength mortar 5.
The shear steel bar 4 adopts HRB400 steel bar with the diameter of 32 mm.
The positions of the failure sections 6 in the square piles are different.
Embodiment two:
referring to fig. 1-2, on the basis of the first embodiment, a process for bending a shearing member based on a combined prestress square pile is characterized in that a shearing steel bar 4 is firstly arranged in a penetrating manner, then a horizontal cable 1 is arranged through a pretensioning method, and when the horizontal cable 1 is tensioned, internal grouting treatment is carried out on a pile hole at the same time;
when the grouting strength is 80% greater than the design strength, the horizontal cable 1 is put into tension.
Before the shear steel bar 4 is arranged, the bonding strength of the epoxy resin 3 needs to be ensured to reach 100% of square pile strength or bonding installation is carried out through the epoxy resin 3 after the grouting strength is 80% higher than the design strength.
Embodiment III:
referring to fig. 3, on the basis of the first embodiment or the second embodiment, two vertically adjacent hollow square piles 2 are connected through a connecting piece, the connecting piece comprises a bolt steel pipe 7 poured at one end inside the hollow square pile 2, and the outer end of the bolt steel pipe 7 extends out of the hollow square pile 2; the other end is reserved with a steel pipe slot 9 matched with the bolt steel pipe 7;
a plurality of inserted bars 8 are symmetrically arranged on the hollow square pile 2 and close to one end of the bolt steel pipe 7, and inserted bar slots 10 matched with the inserted bars 8 are arranged on the other end of the hollow square pile 2;
the bolt steel pipes 7 of two adjacent hollow square piles 2 are matched with the steel pipe slots 9, and a connecting steel plate 11 is arranged between the two hollow square piles 2, and the connecting steel plate 11 is sleeved on the bolt steel pipes 7.
Wherein, the bolt steel pipe 7 can reserve the hole with horizontal cable 1 and shear steel 4 cooperation according to actual conditions.
The technical features of the present invention that are not described in the present invention may be implemented by or using the prior art, and are not described in detail herein, but the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, but is also intended to be within the scope of the present invention by those skilled in the art.
Claims (10)
1. The bending shear member based on the combined prestress square pile is characterized by comprising a plurality of hollow square piles which are arranged in a matrix, wherein the Fang Zhuangkong of the hollow square piles are filled with high-strength mortar;
the shear steel bars are circumferentially and uniformly distributed in the square pile holes and penetrate through the high-strength mortar;
the working surfaces of the adjacent hollow square piles are bonded through epoxy resin.
2. The bending shear member based on combined prestress square piles according to claim 1, wherein the number of the longitudinal hollow square piles is greater than three, and horizontal cables are arranged in square pile holes of all the hollow square piles positioned on the outermost layers of the two longitudinal ends in a penetrating manner, and the horizontal cables are concentrically arranged in the square pile holes.
3. The bending shear member based on combined pre-stressed square piles according to claim 2, wherein the horizontal cables are provided with a plurality of failure sections.
4. The bending shear member based on combined prestressed square piles according to claim 2, wherein the horizontal cable is composed of 5 high-strength steel strands with phi of 15.24 mm.
5. The bending shear member based on combined pre-stressed square piles according to claim 2, wherein the epoxy resin is 50MPa epoxy resin, and the high-strength mortar is C60 high-strength mortar.
6. The shear member based on modular pre-stressed square pile according to claim 2, wherein the shear bars are HRB400 bars with a diameter of 32 mm.
7. The composite prestressed square pile-based bent shear member of claim 2, wherein the location of the failure zone within each square pile is not identical.
8. The bending shear member based on the combined prestress square pile according to claim 2, wherein two vertically adjacent hollow square piles are connected through a connecting piece, the connecting piece comprises a bolt steel pipe poured at one end inside the hollow square pile, and the outer end of the bolt steel pipe extends out of the hollow square pile; the other end is reserved with a steel pipe slot matched with the bolt steel pipe;
a plurality of inserted bars are symmetrically arranged on the hollow square pile and close to one end of the bolt steel pipe, and inserted bar slots matched with the inserted bars are arranged at the other end of the hollow square pile;
the bolt steel pipes of two adjacent hollow square piles are matched with the steel pipe slots, and a connecting steel plate is arranged between the two hollow square piles and sleeved on the bolt steel pipes.
9. A process for a curved shear member based on a combined prestressed square pile according to claim 2, characterized in that firstly, shear steel bars are arranged in a penetrating manner, then the horizontal ropes are arranged by a pretensioning method, and when the horizontal ropes are tensioned, internal grouting treatment is carried out on pile holes;
and when the grouting strength is 80% greater than the design strength, carrying out the tension releasing treatment on the horizontal cable.
10. A process for a curved shear member based on modular pre-stressed square piles according to claim 7, wherein the bonding strength of the epoxy resin is ensured to reach 100% of the square pile strength before the shear steel is set or the bonding installation is performed by the epoxy resin after the grouting strength is 80% greater than the design strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310181758.9A CN116378014A (en) | 2023-03-01 | 2023-03-01 | Bending shear member and process based on combined prestress square pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310181758.9A CN116378014A (en) | 2023-03-01 | 2023-03-01 | Bending shear member and process based on combined prestress square pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116378014A true CN116378014A (en) | 2023-07-04 |
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ID=86966440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310181758.9A Pending CN116378014A (en) | 2023-03-01 | 2023-03-01 | Bending shear member and process based on combined prestress square pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116378014A (en) |
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2023
- 2023-03-01 CN CN202310181758.9A patent/CN116378014A/en active Pending
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