CN109555119A - Slow setting knot prestressing cast pile and method for resistance to plucking - Google Patents
Slow setting knot prestressing cast pile and method for resistance to plucking Download PDFInfo
- Publication number
- CN109555119A CN109555119A CN201811514508.8A CN201811514508A CN109555119A CN 109555119 A CN109555119 A CN 109555119A CN 201811514508 A CN201811514508 A CN 201811514508A CN 109555119 A CN109555119 A CN 109555119A
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- slow setting
- steel
- setting knot
- vertical bar
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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
- E02D5/58—Prestressed concrete piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of slow setting knot prestressing cast piles and method for resistance to plucking, including steel reinforcement cage, several reinforcing bars and several slow setting knot presstressed reinforcing steels on steel reinforcement cage；Each reinforcing bar and each slow setting knot presstressed reinforcing steel extend along the direction of axis line of steel reinforcement cage, the slow setting knot presstressed reinforcing steel includes casing and several prestress steel hank knottings in casing, retarded adhesive prestressed binder is filled between casing and each prestress steel hank knotting, every slow setting knot presstressed reinforcing steel lower end is equipped with pre-stressed anchorage body；Each reinforcing bar and each slow setting knot presstressed reinforcing steel are connect with cushion cap.The present invention has low cost, and construction is easy, resistance to plucking and the strong feature of anti-floating ability.
Description
Technical field
The present invention relates to basement anti-floating technical fields, are perfused more particularly, to a kind of slow setting knot prestressing force for resistance to plucking
Stake and method.
Background technique
With the continuous development of urban construction, the utilization of the underground space is constantly promoted, and multi-storey basement is more and more, basis
Embedding deeper and deeper, Housing Project uses two layers of basement, and items in commerce is commonplace using three layers and the above basement.In east
Portion coastal area, rich groundwater, for flood season level often in grade position, basement anti-floating problem is severe.Above-mentioned area
Basement need that uplift pile is arranged.Due to the needs of durability, uplift pile must carry out the Checking Computation of Cracks under water buoyancy effect.
The uplift pile amount of reinforcement of multi-storey basement is often 2-4 times of compressive pile amount of reinforcement at present.
Water is abundant in bored concrete pile working environment, often containing the microelement that is corrosive in water and soil, under water buoyancy effect,
Concrete belt joint working, and underground engineering rigging can not be replaced, and Non-cohesive Prestressing Force Technology is such as used, and prestressing force head undermines mistake
Effect probability is big, and there are great risks for engineering；And common prestressing technique is unable to satisfy the time requirement of excavation of foundation pit.
Summary of the invention
Goal of the invention of the invention is the big deficiency of engineering difficulty in order to overcome uplift pile cost in the prior art high,
Provide a kind of slow setting knot prestressing cast pile and method for resistance to plucking.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of slow setting knot prestressing cast pile for resistance to plucking, including steel reinforcement cage, several reinforcing bars on steel reinforcement cage
With several slow setting knot presstressed reinforcing steels；Each reinforcing bar and each slow setting knot presstressed reinforcing steel prolong along the direction of axis line of steel reinforcement cage
It stretches, the slow setting knot presstressed reinforcing steel includes casing and several prestress steel hank knottings in casing, and casing is answered in advance with each item
Retarded adhesive prestressed binder is filled between power steel wire, every slow setting knot presstressed reinforcing steel lower end is equipped with prestress anchoraging
Body；Each reinforcing bar and each slow setting knot presstressed reinforcing steel are connect with cushion cap.
To overcome multi-storey basement cobalt hole pouring pile using practical difficulty present in prestressing technique, the present invention is in reinforcing bar
A plurality of slow setting knot presstressed reinforcing steel is set in cage, is separated concrete and retarded adhesive prestressed steel wire by casing, while pre-
Stress steel wire surface applies slow setting knot adhesive, and after concrete curing, prestress steel hank knotting is still within free movement state,
Tensioning can be carried out after excavation of foundation pit；Referred to simultaneously using the solidification mechanical property that several months~several years of slow setting knot adhesive is not waited
Mark gradually solidifies after the completion of tensioning to ensure effective bonding between steel wire and concrete, low cost of the present invention, and construction is held
Easily, resistance to plucking and anti-floating ability are strong.
Preferably, cushion cap includes enclosing framework of steel reinforcement and casting in the casting concrete enclosed on framework of steel reinforcement；Cushion cap
Top view be in rectangle or triangle.
Preferably, each prestress steel hank knotting upper end of the slow setting knot presstressed reinforcing steel is stretched out except casing, slow setting
Knot presstressed reinforcing steel upper end is connect with prestressing force pull end anchorage；Prestressing force pull end anchorage includes being set to slow setting knot presstressed reinforcing steel
The anchor slab of each prestress steel hank knotting upper end, the collet set on every prestress steel hank knotting upper end, each item set on anchor slab lower part
Cushion cover on prestress steel hank knotting, the spiral reinforcement on cushion cover.
Preferably, further include support base, the support base includes the cushion block of triangular pyramid and 3 piece three on cushion block
Angular plate, 3 pieces of triangular plate upper end rotation connections, is connected between 3 pieces of triangular plate upper ends and cushion block upper end by rope, 3 pieces
Triangular plate lower end is contacted with cushion block lower edge.
Support base is used for strutting steel reinforcement cage lower part, makes each reinforcing bar and each slow setting knot presstressed reinforcing steel outward by a small margin
It bends, after casting concrete, the breakout capacity of entire bored concrete pile can be improved.
Preferably, further include reamer, reamer includes disk and vertical bar, vertical bar upper end stretch out disk upper surface it
Outside, vertical bar lower part is equipped with arc scraper, and arc scraper and vertical bar are rotatablely connected, and disk is equipped with first motor, and vertical bar upper end is set
There is ring gear, the gear connecting with first motor is engaged with ring gear, and vertical bar is equipped with the micro electric for driving arc scraper to rotate
Machine, micromotor and first motor are electrically connected with the controller.
A method of for the slow setting knot prestressing cast pile of resistance to plucking, include the following steps:
(6-1) carries out the pore-forming operation of each bored concrete pile；
(6-2) places steel reinforcement cage in the hole of each bored concrete pile, and each reinforcing bar is fixed on each steel reinforcement cage and each item is slow
Condense presstressed reinforcing steel；
(6-3) forms bored concrete pile in each steel reinforcement cage upper concrete；
(6-4) digs the foundation pit of basement around each bored concrete pile；
(6-5) is poured concrete cushion in foundation pit；
Each reinforcing bar is fixedly connected by (6-6) with cushion cap, is opened to each slow setting knot presstressed reinforcing steel of each bored concrete pile
After drawing anchoring, each slow setting knot presstressed reinforcing steel is fixedly connected with cushion cap；
(6-7) completes the casting of cushion cap concrete.
Preferably, further include support base, the support base includes the cushion block of triangular pyramid and 3 piece three on cushion block
Angular plate, 3 pieces of triangular plate upper end rotation connections, is connected between 3 pieces of triangular plate upper ends and cushion block upper end by rope, 3 pieces
Triangular plate lower end is contacted with cushion block lower edge；It further include reamer, reamer includes disk and vertical bar, and circle is stretched out in vertical bar upper end
Except disk upper surface, vertical bar lower part is equipped with arc scraper, and arc scraper and vertical bar are rotatablely connected, and disk is equipped with first motor,
Vertical bar upper end is equipped with ring gear, and the gear connecting with first motor is engaged with ring gear, and vertical bar is equipped with for driving arc scraper to revolve
The micromotor turned, micromotor and first motor are electrically connected with the controller；Step (6-2) is replaced by following steps:
Vertical bar is put into each hole, makes disk cover on hole, controller controls minitype motor driving arc scraper and erects
Angle between bar increases, and control first motor drives vertical bar rotation, so that hole lower part be made to become diameter greater than hole upper diameter
Expand section；
A support base is placed in each bored concrete pile using rope, steel reinforcement cage is placed in each hole, in steel reinforcement cage
Under pressure effect, 3 pieces of triangular plates are along cushion block slide downward, until 3 pieces of triangular plate upper ends and cushion block upper-end contact, 3 piece three
Angular plate access aperture is expanded in section, and 3 pieces of triangular plate lower parts, which enter, expands in section, and the reinforcing bar and slow setting knot of steel reinforcement cage lower part are pre-
Stress rib, which is imported into, to be expanded in section.
Therefore, the invention has the following beneficial effects: after concrete curing, prestress steel hank knotting, which is still within, to be move freely
State can carry out tensioning after excavation of foundation pit；The solidification mechanical property not waited using several months~several years of slow setting knot adhesive simultaneously
Energy index, gradually solidifies after the completion of tensioning to ensure effective bonding between steel wire and concrete；Low cost, construction are held
Easily, resistance to plucking and anti-floating ability are strong.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of steel reinforcement cage of the invention；
Fig. 2 is a kind of cross-sectional structure schematic diagram at the A-A of Fig. 1；
Fig. 3 is a kind of cross-sectional view of prestressing force pull end anchorage of the invention；
Fig. 4 is a kind of cross-sectional view of cushion cap of the invention；
Fig. 5 is a kind of structural schematic diagram of reamer of the invention；
Fig. 6 is that support base of the invention removes a kind of structural schematic diagram after one piece of triangular plate.
In figure: steel reinforcement cage 1, reinforcing bar 2, slow setting knot presstressed reinforcing steel 3, cushion cap 4, anchor slab 5, collet 6, cushion cover 7, spiral reinforcement 8,
Support base 9, disk 10, prestressing force pull end anchorage 11, reamer 12, casing 31, prestress steel hank knotting 32, pre-stressed anchorage body
33, enclose framework of steel reinforcement 41, cushion block 91, triangular plate 92, vertical bar 101, arc scraper 102, first motor 103, ring gear 104,
Gear 105.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment 1
Embodiment as shown in Figure 1, Figure 2, Figure 3, Figure 4 is a kind of slow setting knot prestressing cast pile for resistance to plucking, including
Steel reinforcement cage 1, a plurality of reinforcing bar 2 and several slow setting knot presstressed reinforcing steels 3 on steel reinforcement cage；Each reinforcing bar and each slow setting knot are pre-
Stress rib extends along the direction of axis line of steel reinforcement cage, and slow setting knot presstressed reinforcing steel includes casing 31 and several in casing
Prestress steel hank knotting 32 is filled with retarded adhesive prestressed binder, every slow setting knot between casing and each prestress steel hank knotting
Presstressed reinforcing steel lower end is equipped with pre-stressed anchorage body 33；Each reinforcing bar and each slow setting knot presstressed reinforcing steel are connect with cushion cap 4.
Cushion cap includes enclosing framework of steel reinforcement 41 and casting in the casting concrete enclosed on framework of steel reinforcement；The top view of cushion cap
In rectangle or triangle.
As shown in figure 3, each prestress steel hank knotting upper end of slow setting knot presstressed reinforcing steel is stretched out except casing, slow setting knot is pre-
Stress rib upper end is connect with prestressing force pull end anchorage 11；Prestressing force pull end anchorage includes set on each of slow setting knot presstressed reinforcing steel
The anchor slab 5 of prestress steel hank knotting upper end, the collet 6 set on every prestress steel hank knotting upper end, each item set on anchor slab lower part
Cushion cover 7 on prestress steel hank knotting, the spiral reinforcement 8 on cushion cover.
A method of for the slow setting knot prestressing cast pile of resistance to plucking, include the following steps:
(6-1) carries out the pore-forming operation of each bored concrete pile；
(6-2) places steel reinforcement cage in the hole of each bored concrete pile, and each reinforcing bar is fixed on each steel reinforcement cage and each item is slow
Condense presstressed reinforcing steel；
(6-3) forms bored concrete pile in each steel reinforcement cage upper concrete；
(6-4) digs the foundation pit of basement around each bored concrete pile；
(6-5) is poured concrete cushion in foundation pit；
Each reinforcing bar is fixedly connected by (6-6) with cushion cap, is opened to each slow setting knot presstressed reinforcing steel of each bored concrete pile
After drawing anchoring, each slow setting knot presstressed reinforcing steel is fixedly connected with cushion cap；
(6-7) completes the casting of cushion cap concrete.
Embodiment 2
Embodiment 2 includes all structures and methods parts of embodiment 1, as shown in fig. 6, embodiment 2 further includes support base
9, support base includes that the cushion block 91 of triangular pyramid and 3 pieces of triangular plates, 92,3 pieces of triangular plate upper end rotations on cushion block connect
It connects, is connected between 3 pieces of triangular plate upper ends and cushion block upper end by rope, 3 pieces of triangular plate lower ends are contacted with cushion block lower edge.
As shown in figure 5, further including reamer 12, reamer includes disk 10 and vertical bar 101, and vertical bar upper end is stretched out on disk
Except surface, vertical bar lower part is equipped with arc scraper 102, and arc scraper and vertical bar are rotatablely connected, and disk is equipped with first motor
103, vertical bar upper end is equipped with ring gear 104, and the gear 105 connecting with first motor is engaged with ring gear, and vertical bar is equipped with for driving
The micromotor of arc scraper rotation, micromotor and first motor are electrically connected with the controller.
The step of embodiment 1, (6-2) was replaced by following steps:
Vertical bar is put into each hole, makes disk cover on hole, controller controls minitype motor driving arc scraper and erects
Angle between bar increases, and control first motor drives vertical bar rotation, so that hole lower part be made to become diameter greater than hole upper diameter
Expand section；
A support base is placed in each bored concrete pile using rope, steel reinforcement cage is placed in each hole, in steel reinforcement cage
Under pressure effect, 3 pieces of triangular plates are along cushion block slide downward, until 3 pieces of triangular plate upper ends and cushion block upper-end contact, 3 piece three
Angular plate access aperture is expanded in section, and 3 pieces of triangular plate lower parts, which enter, expands in section, and the reinforcing bar and slow setting knot of steel reinforcement cage lower part are pre-
Stress rib, which is imported into, to be expanded in section.
It should be understood that this embodiment is only used to illustrate the invention but not to limit the scope of the invention.In addition, it should also be understood that,
After having read the content of the invention lectured, those skilled in the art can make various modifications or changes to the present invention, these etc.
Valence form is also fallen within the scope of the appended claims of the present application.
Claims (7)
1. a kind of slow setting knot prestressing cast pile for resistance to plucking, characterized in that including steel reinforcement cage (1), on steel reinforcement cage
Several reinforcing bars (2) and several slow setting knot presstressed reinforcing steels (3)；Each reinforcing bar and each slow setting knot presstressed reinforcing steel are along steel reinforcement cage
Direction of axis line extend, the slow setting knot presstressed reinforcing steel includes casing (31) and several prestress steel twists in casing
Silk (32) is filled with retarded adhesive prestressed binder, every slow setting knot presstressed reinforcing steel between casing and each prestress steel hank knotting
Lower end is equipped with pre-stressed anchorage body (33)；Each reinforcing bar and each slow setting knot presstressed reinforcing steel are connect with cushion cap (4).
2. the slow setting knot prestressing cast pile according to claim 1 for resistance to plucking, characterized in that cushion cap includes enclosing steel
Tendons skeleton (41) and cast in enclose framework of steel reinforcement on casting concrete；The top view of cushion cap is in rectangle or triangle.
3. the slow setting knot prestressing cast pile according to claim 1 for resistance to plucking, characterized in that the slow setting knot is answered in advance
Each prestress steel hank knotting upper end of power muscle is stretched out except casing, slow setting knot presstressed reinforcing steel upper end and prestressing force pull end anchorage
(11) it connects；Prestressing force pull end anchorage includes the anchor slab set on each prestress steel hank knotting upper end of slow setting knot presstressed reinforcing steel
(5), the cushion cover set on the collet (6) of every prestress steel hank knotting upper end, on each prestress steel hank knotting of anchor slab lower part
(7), the spiral reinforcement on cushion cover (8).
4. the slow setting knot prestressing cast pile according to claim 1 for resistance to plucking, characterized in that further include support base
(9), the support base includes the cushion block (91) of triangular pyramid and 3 pieces of triangular plates (92) on cushion block, 3 pieces of triangular plates
Upper end rotation connection, is connected between 3 pieces of triangular plate upper ends and cushion block upper end by rope, 3 pieces of triangular plate lower ends and cushion block
Lower edge contact.
5. the slow setting knot prestressing cast pile according to claim 1 or 2 or 3 or 4 for resistance to plucking, characterized in that also wrap
It includes reamer (12), reamer includes disk (10) and vertical bar (101), and vertical bar upper end is stretched out except disk upper surface, under vertical bar
Portion is equipped with arc scraper (102), and arc scraper and vertical bar are rotatablely connected, and disk is equipped with first motor (103), and vertical bar upper end is set
Have ring gear (104), the gear connecting with first motor (105) is engaged with ring gear, and vertical bar is equipped with for driving arc scraper to revolve
The micromotor turned, micromotor and first motor are electrically connected with the controller.
6. a kind of method based on the slow setting knot prestressing cast pile described in claim 1 for resistance to plucking, characterized in that including
Following steps:
(6-1) carries out the pore-forming operation of each bored concrete pile；
(6-2) places steel reinforcement cage in the hole of each bored concrete pile, and each reinforcing bar and each slow setting knot are fixed on each steel reinforcement cage
Presstressed reinforcing steel；
(6-3) forms bored concrete pile in each steel reinforcement cage upper concrete；
(6-4) digs the foundation pit of basement around each bored concrete pile；
(6-5) is poured concrete cushion in foundation pit；
Each reinforcing bar is fixedly connected by (6-6) with cushion cap, carries out tensioning anchor to each slow setting knot presstressed reinforcing steel of each bored concrete pile
Gu after, each slow setting knot presstressed reinforcing steel is fixedly connected with cushion cap；
(6-7) completes the casting of cushion cap concrete.
7. the method for the slow setting knot prestressing cast pile according to claim 6 for resistance to plucking, further includes support base, described
Support base includes the cushion block of triangular pyramid and 3 pieces of triangular plates on cushion block, and 3 pieces of triangular plate upper ends are rotatablely connected, and 3 pieces
It is connected between triangular plate upper end and cushion block upper end by rope, 3 pieces of triangular plate lower ends are contacted with cushion block lower edge；Further include
Reamer, reamer include disk and vertical bar, and vertical bar upper end is stretched out except disk upper surface, and vertical bar lower part is equipped with arc scraper,
Arc scraper and vertical bar are rotatablely connected, and disk is equipped with first motor, and vertical bar upper end is equipped with ring gear, the tooth connecting with first motor
Wheel engage with ring gear, vertical bar equipped with for driving the micromotor of arc scraper rotation, micromotor and first motor with
Controller electrical connection；It is characterized in that step (6-2) is replaced by following steps:
Vertical bar is put into each hole, makes disk cover on hole, controller control minitype motor driving arc scraper and vertical bar it
Between angle increase, control first motor drives vertical bar rotation, so that it is swollen greater than hole upper diameter so that hole lower part is become diameter
Big section；
A support base is placed in each bored concrete pile using rope, steel reinforcement cage is placed in each hole, in the pressure of steel reinforcement cage
Under effect, 3 pieces of triangular plates are along cushion block slide downward, until 3 pieces of triangular plate upper ends and cushion block upper-end contact, 3 pieces of triangles
Plate access aperture is expanded in section, and 3 pieces of triangular plate lower parts, which enter, expands in section, the reinforcing bar and slow setting knot prestressing force of steel reinforcement cage lower part
Muscle, which is imported into, to be expanded in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811514508.8A CN109555119B (en) | 2018-12-11 | 2018-12-11 | Retarding and coagulating prestressed cast-in-place pile for resisting pulling and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811514508.8A CN109555119B (en) | 2018-12-11 | 2018-12-11 | Retarding and coagulating prestressed cast-in-place pile for resisting pulling and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109555119A true CN109555119A (en) | 2019-04-02 |
| CN109555119B CN109555119B (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811514508.8A Active CN109555119B (en) | 2018-12-11 | 2018-12-11 | Retarding and coagulating prestressed cast-in-place pile for resisting pulling and method |
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| Country | Link |
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| CN (1) | CN109555119B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502807A (en) * | 2021-06-15 | 2021-10-15 | 浙江省建筑设计研究院 | Slow-setting prestressed filling pile reinforcement cage structure and sectional construction method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629418A (en) * | 2009-08-03 | 2010-01-20 | 天津市建筑科学研究院 | Post-tensioned prestressing cast pile and construction method thereof |
| CN103867130A (en) * | 2014-03-26 | 2014-06-18 | 华东建筑设计研究院有限公司 | Mechanical expanded bore pile drill bit |
-
2018
- 2018-12-11 CN CN201811514508.8A patent/CN109555119B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629418A (en) * | 2009-08-03 | 2010-01-20 | 天津市建筑科学研究院 | Post-tensioned prestressing cast pile and construction method thereof |
| CN103867130A (en) * | 2014-03-26 | 2014-06-18 | 华东建筑设计研究院有限公司 | Mechanical expanded bore pile drill bit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502807A (en) * | 2021-06-15 | 2021-10-15 | 浙江省建筑设计研究院 | Slow-setting prestressed filling pile reinforcement cage structure and sectional construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN109555119B (en) | 2020-09-01 |
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