CN211340824U - Concrete uplift pile with pressed pile body - Google Patents
Concrete uplift pile with pressed pile body Download PDFInfo
- Publication number
- CN211340824U CN211340824U CN201921587718.XU CN201921587718U CN211340824U CN 211340824 U CN211340824 U CN 211340824U CN 201921587718 U CN201921587718 U CN 201921587718U CN 211340824 U CN211340824 U CN 211340824U
- Authority
- CN
- China
- Prior art keywords
- concrete
- pile body
- pile
- strand wires
- steel strand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to a concrete uplift pile of pile body pressurized, including the stake hole, the downthehole concrete pile body that is equipped with of stake, stake hole upper portion is equipped with the cushion cap, the cushion cap has the concrete cushion, it is equipped with vertical steel strand wires to be close to the lateral wall in the concrete pile body, the lower part of steel strand wires is the anchor section, the steel strand wires on anchor section upper portion are pile body pressurized section, steel strand wires are equipped with the sleeve pipe in pile body pressurized section, the sleeve pipe outside and steel strand wires anchor section outside are equipped with the spiral stirrup, the steel strand wires upper end is equipped with the reservation reinforcing bar that stretches out sleeve pipe and anchor income cushion cap, the sheathed tube is last, lower port coats and is stamped the sealing adhesive tape. The uplift pile of the utility model keeps the concrete pressed in most ranges, can not crack under tension, has small tension even if being pulled in a small amount of ranges at the lower part, and can not crack under tension, thereby well utilizing the high-strength compression strength of the concrete and the high-strength tensile strength of the reinforcing steel bar; in addition, the pile top tension steel bar is reserved and can be directly anchored into the bearing platform, force transmission is direct, and no potential safety hazard exists.
Description
Technical Field
The utility model belongs to the technical field of civil engineering construction technique and specifically relates to a concrete uplift pile of pile body pressurized can regard as the resistance to plucking of basement to use.
Background
In order to meet the parking requirements of larger and larger residential districts, the construction amount of the civil basements is larger and larger, and the matching construction amount of the civil air defense basements is also larger. The basement is like a ship, and under the action of underground water, the anti-floating measure of the basement is particularly important in design. According to the Archimedes' law, counter weights or uplift piles must be adopted to resist the buoyancy of underground water. One counterweight method is to increase the thickness of the basement floor, so that the burial depth of the foundation is correspondingly increased, and the earth excavation amount and the foundation pit supporting cost are increased. The other counterweight mode is to increase the thickness of the top plate or the soil covered on the top plate, so the manufacturing cost of the top plate of the basement is high, and the burial depth of the basement is increased, so that the method for resisting the water buoyancy by adopting the counterweight mode is few at present. The common anti-floating measure is that an anti-floating pile is arranged below a basement bottom plate, a steel bar in the pile is anchored in the bottom plate, upward water buoyancy is offset through downward pulling force of the pile, force transmission is direct, and the manufacturing cost is much lower than that of a counterweight mode.
The force transmission path of the commonly used concrete uplift pile is as follows: the buoyancy of the foundation bottom is transferred to the reinforcing steel bars, the reinforcing steel bars are transferred to the concrete through the bond of the concrete, and the concrete is transferred to the soil around the pile through the friction force between the concrete and the soil. The uplift pile is used as an axial tension member, all tension is borne by the steel bars, the concrete is also tensioned while the steel bars are tensioned, and the tension bearing capacity of the concrete is very low. The concrete is easy to crack and seep water after being tensioned, and the reinforcing steel bars in the concrete need not to be corroded by water after long-term working, so the cracking cracks of the concrete cannot be larger than 0.2mm according to the national regulations. Therefore, in actual works, the amount of reinforcing steel bars to be arranged for reducing concrete cracks is large, and the cost is high. In addition, in the prior prefabricated prestressed piles on the market, concrete is really in a compressed state and cannot crack, but beard reinforcing steel bars anchored into a bearing platform cannot be reserved at the top of the prefabricated prestressed piles, the anchoring reinforcing steel bars generally need to be additionally welded or the prestressed reinforcing steel bars need to be knocked out, the stress is unreliable, and the potential safety hazard is high. In the prestressed uplift pile, special anchorage devices are arranged at the bottom and the top of the steel strand, the special anchorage devices are expensive, and under the condition of no initial prestress, the anchorage can not work normally, so that potential safety hazards are brought to use. In addition, the bottom of the uplift pile is provided with an anchoring pressure-bearing steel plate, the steel plate is exposed in a soil layer, the durability is poor, and once the steel plate fails, the uplift resistance does not exist.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: overcomes the defects in the prior art and provides a concrete uplift pile with a pressed pile body.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a concrete uplift pile that pile body pressurized, includes the stake hole, the downthehole concrete pile body that is equipped with of stake, stake hole upper portion are equipped with the cushion cap, the cushion cap below sets up the concrete cushion, it is equipped with vertical steel strand wires to be close to the lateral wall in the concrete pile body, and the lower part of steel strand wires is the anchor section, and the steel strand wires on anchor section upper portion are pile body pressurized section, and pile body pressurized section steel strand wires are equipped with the sleeve pipe, and sleeve pipe and anchor section steel strand wires outside are connected with the spiral stirrup, and the steel strand wires upper end is equipped with the reservation reinforcing bar that stretches out the sleeve pipe and anchor in stake hole upper portion cushion cap, and sheathed tube upper and lower port coats and is stamped the sealing adhesive tape.
Further, the sleeve is made of steel pipes or PVC pipes. When the sleeve adopts a steel pipe, the steel pipe and the concrete are compressed together, and the uplift pile can be used as an uplift pile at the same time.
Further limiting, HRB hot rolled steel bars are arranged in the concrete pile body and close to the outer side wall, and anchoring end plates are arranged at the bottoms of anchoring sections of the HRB hot rolled steel bars.
Further defined, the anchoring end plate is welded to the HRB hot rolled steel bar.
Further defined, the anchoring end plate is threaded with the HRB hot rolled steel bar.
The invention has the beneficial effects that: the uplift pile of the invention keeps the concrete pressed in most range, and can not crack at all, even if the pile is pulled in a small amount of range at the lower part, the tension is small, the concrete can not crack, and the high-strength compression strength of the concrete and the high-strength tensile strength of the reinforcing steel bar are well utilized; in addition, the beard ribs are reserved on the tension steel bars, and can be directly anchored into the bearing platform, so that force transmission is direct, and no potential safety hazard exists.
Drawings
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a sectional view in the direction of a-a in fig. 1.
Fig. 3 is a sectional view in the direction B-B in fig. 1.
Fig. 4 is a schematic structural view of embodiment 2 of the present invention.
In the figure: 1. the concrete pile comprises a pile hole, 2 parts of a concrete pile body, 3 parts of a bearing platform, 4 parts of steel strands, 5 parts of sleeves, 6 parts of spiral stirrups, 7 parts of sealing adhesive tapes, 8 parts of concrete cushions, 9 parts of anchoring end plates, 41 parts of anchoring sections, 42 parts of pile body compression sections and 43 parts of reserved steel bars.
Detailed Description
The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.
Example 1:
as shown in fig. 1-3, a concrete uplift pile with a pressed pile body, including pile hole 1, be equipped with concrete pile body 2 in the pile hole 1, pile hole 1 upper portion is equipped with cushion cap 3, it is equipped with vertical steel strand wires 4 to be close to the lateral wall in the concrete pile body 2, the lower part of steel strand wires 4 is anchor section 41, steel strand wires 4 on anchor section 41 upper portion are pile body pressed section 42, pile body pressed section 42 is equipped with sleeve pipe 5 outward, sleeve pipe 5 and anchor section 41 outside are connected with spiral stirrup 6, steel strand wires 4 upper end is equipped with the reservation reinforcing bar 43 that stretches out sleeve pipe 5 and anchor in pile hole upper portion cushion cap 3, the upper and lower port of sleeve pipe 5 coats and is stamped sealing adhesive tape 7.
A concrete cushion layer 8 is arranged below the bearing platform 3, and the sleeve 5 is a steel pipe or a PVC pipe.
Example 2:
as shown in fig. 4, the difference from embodiment 1 is that: HRB hot rolled steel bars are arranged in the concrete pile body 2 and close to the outer side wall, anchoring end plates 9 are arranged at the bottoms of anchoring sections of the HRB hot rolled steel bars, and the anchoring end plates 9 are welded or screwed with the HRB hot rolled steel bars. Thus, the anchoring effect is better, and the length of the anchoring section can be smaller.
The uplift pile with the pressed pile body of the embodiment bears two external forces, namely the downward friction force of pile side soil per linear meter q and the pulling force F of the steel strand 4, wherein F is q (L1+ L2), wherein L1 is the length of the pressed section 42 of the pile body, and L2 is the length of the anchoring section 41; the concrete in the pile body 2 has different tension and compression internal forces in different length ranges. The steel strand 4 is pulled in full length, and the characteristic of high-strength tension is fully exerted; the concrete is pressed in the range of the longer pile body pressing section 42, and the characteristic of high concrete pressing strength is fully exerted; the concrete is pulled within the shorter lower anchor section 41, typically within 2m, and the anchor section 41 is subjected to a pulling force of qL2 only, so that the concrete does not crack under such a small pulling force. In addition, the lower end part of the steel strand 4 is provided with an anchoring end plate 8, so that the anchoring effect is better, and the length of the anchoring section 41 is smaller.
And the stress of the steel bars and the concrete of the conventional uplift pile causes the concrete to crack for many times, if the requirement of smaller crack width is to be met, a large number of steel bars need to be configured, and because the elastic modulus of the common steel bars and the elastic modulus of the steel strands are close, the calculated crack width is close, and the strength of the steel strands cannot be fully exerted.
According to the technical specification of building pile foundations, JGJ 94-20085.8.7, the normal section tensile bearing capacity of the reinforced concrete axial uplift pile conforms to the specification of a formula I, the formula I shows that all the tensile force is borne by the steel strands 4,
N≤fyAs+fpyApy(Ⅰ)
in the formula: n is the axial tension value of the lower pile top basically combined by the load effect; f. ofyThe tensile strength of common steel bars; f. ofpyThe tensile strength of the prestressed reinforcement; a. thesIs the cross-sectional area of a common steel bar; a. thepyIs the cross-sectional area of the prestressed reinforcement; from this formula, can confirm the prestressing force reinforcing bar quantity in the stake.
According to the specification of concrete structure design GB50010-2010 8.3.1, the anchoring length of the prestressed steel bars (steel strands) is required to meet the specification of a formula II,
in the formula IabIs the basic anchoring length of the tensioned steel bar; f. ofyThe tensile strength of common steel bars; f. ofpyThe tensile strength of the prestressed tendon; f. oftThe tensile strength of the concrete axle center is obtained, when the concrete strength grade is higher than C60, the value is obtained according to C60, d is the diameter of the anchoring steel bar, and α is the appearance coefficient of the anchoring steel bar, which is shown in Table 1.
TABLE 1 appearance factor alpha of anchored steel bars
| Of the reinforcing bar type | Plain round steel bar | Ribbed steel bar | Spiral rib steel wire | Three-strand steel stranded wire | Seven-strand steel strand |
| α | 0.16 | 0.14 | 0.13 | 0.16 | 0.17 |
The concrete uplift pile with the pressed pile body has basically the same construction as a conventional pile foundation and the same length, and can be longer than a conventional pile to provide larger bearing capacity if required; the number of the steel strands is calculated by the required pulling resistance (formula I), and the length of the anchoring section of the steel bar is calculated by the strength of the steel bar and the strength of the concrete (formula II); during construction, the sleeve 5 is additionally arranged on the upper section of the steel reinforcement cage (the steel strand 4 and the spiral stirrup 6), the upper end and the lower end of the sleeve 5 are sealed by the adhesive tape 7, and pouring concrete slurry is prevented from entering the sleeve 5.
The concrete uplift pile with the pressed pile body can be a cast-in-place pile or a precast pile, can be used as the uplift pile and the pressure-resistant pile at the same time, and has the same construction method as that of a conventional pile. The difference is that: the steel bar can adopt high-strength steel strand. Because the uplift pile is in tension, the tension force of the uplift pile is completely born by the steel bars, so that the higher the strength of the steel bars is, the more steel is used. The conventional 1860 steel strand is 4.5 times of the HRB400 common hot rolled steel bar, so after the steel strand 4 is adopted, the steel consumption is only 1/4 of the conventional steel bar. Secondly, the steel bars and the concrete in the lower anchoring section 41 are directly poured together, the sleeve 5 is arranged on the outer side of the steel strand 4 of the pile body compression section 42, the sleeve 5 and the concrete are poured together, in order to prevent concrete slurry from entering the sleeve 5 during pouring, the beam end of the sleeve 5 is sealed by an adhesive tape 7, and the steel strand 4 in the sleeve 5 can freely stretch out and draw back. When the bearing platform 3 is poured, the steel strand 4 reserved at the upper end is anchored into the bearing platform 3 for pouring together, force transmission is direct, and no potential safety hazard exists. The pile can also be used as a compression-resistant pile, and when the pile is subjected to compression resistance, the sleeve 5 adopts a steel pipe, and the steel pipe and the concrete are jointly pressed to provide upward force.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable people skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (5)
1. The utility model provides a concrete uplift pile that pile body pressurized, includes stake hole (1), be equipped with concrete pile body (2) in stake hole (1), stake hole (1) upper portion is equipped with cushion cap (3), its characterized in that: bearing platform (3) below sets up concrete cushion (8), be close to the lateral wall in concrete pile body (2) and be equipped with vertical steel strand wires (4), the lower part of steel strand wires (4) is anchor section (41), steel strand wires (4) on anchor section (41) upper portion are pile body pressurized section (42), pile body pressurized section (42) are equipped with sleeve pipe (5) outward, sleeve pipe (5) and anchor section (41) outside are connected with spiral stirrup (6), steel strand wires (4) upper end is equipped with and stretches out sleeve pipe (5) and anchor and goes into reserved reinforcing bar (43) in stake hole (1) upper portion bearing platform (3), the upper and lower port of sleeve pipe (5) coats and is stamped sealing adhesive tape (7).
2. The concrete uplift pile with the pressed pile body according to claim 1, wherein: the sleeve (5) is a steel pipe or a PVC pipe.
3. The concrete uplift pile with the pressed pile body according to claim 1, wherein: HRB hot rolled steel bars are arranged in the concrete pile body (2) and close to the outer side wall, and anchoring end plates (9) are arranged at the bottoms of anchoring sections of the HRB hot rolled steel bars.
4. The concrete uplift pile with the pressed pile body according to claim 3, wherein: and the anchoring end plate (9) is welded and connected with the HRB hot rolled steel bar.
5. The concrete uplift pile with the pressed pile body according to claim 3, wherein: and the anchoring end plate (9) is in threaded connection with the HRB hot rolled steel bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921587718.XU CN211340824U (en) | 2019-09-23 | 2019-09-23 | Concrete uplift pile with pressed pile body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921587718.XU CN211340824U (en) | 2019-09-23 | 2019-09-23 | Concrete uplift pile with pressed pile body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211340824U true CN211340824U (en) | 2020-08-25 |
Family
ID=72134027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921587718.XU Active CN211340824U (en) | 2019-09-23 | 2019-09-23 | Concrete uplift pile with pressed pile body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211340824U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914300A (en) * | 2021-10-21 | 2022-01-11 | 江苏地基工程有限公司 | Prefabricated uplift pile and construction method thereof |
-
2019
- 2019-09-23 CN CN201921587718.XU patent/CN211340824U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914300A (en) * | 2021-10-21 | 2022-01-11 | 江苏地基工程有限公司 | Prefabricated uplift pile and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11293183B2 (en) | Precast column base joint and construction method therefor | |
| CN201459716U (en) | Retard-bonded or unbonded post-tensioned prestressing filling pile | |
| CN105350531B (en) | The pile tube anchor pole composite foundation and construction technology of tension compression bidirectional load can be born | |
| CN111894045A (en) | Anti-floating anchoring structure and anti-floating anchoring construction method for basement bottom plate | |
| CN111058475A (en) | High-intensity seismic area pile foundation joist constant-weight retaining wall structure and construction method | |
| CN201258481Y (en) | Prefabricated uplift pile by post-tensioning method | |
| CN211340824U (en) | Concrete uplift pile with pressed pile body | |
| CN102345292B (en) | A kind of composite prestressed uplift pile with enlarged footing | |
| CN205557512U (en) | Recoverable prestressing force anti -floating pile | |
| CN203188202U (en) | Pressure type high bearing capacity composite uplift pile | |
| CN112095586A (en) | Prestressed post-inserted composite anchor cable uplift pile and preparation method thereof | |
| CN201016169Y (en) | Eccentric prestressed anchor rope friction pile | |
| CN112095585A (en) | Prestressed composite anchor cable uplift pile and preparation method thereof | |
| CN112049158A (en) | Bottom-expanding type prestress composite anchor cable uplift pile and preparation method thereof | |
| CN100535259C (en) | Partial adhered prestressed pile against drawing and floating and its construction | |
| CN104452798B (en) | Offshore wind turbine foundation structure and equipment and construction method of offshore wind turbine foundation equipment | |
| CN201024419Y (en) | Partial adhesion prestressed anti-pulling anti-floating pile stranded wire cage | |
| CN213897088U (en) | PSB finish rolling screw-thread steel prestressed concrete fender pile structure | |
| CN216920296U (en) | Post-tensioned prestressed fender post with bonding function | |
| CN213061997U (en) | Pre-tensioned pre-stressed anti-floating anchor cable construction structure | |
| CN201277942Y (en) | Pressure dispersion type stress distribution detection apparatus for anchor cable and anchor solid | |
| CN212582757U (en) | Anti-floating anchoring structure for basement bottom plate | |
| CN110805060B (en) | Base structure for stay wire of stay wire tower and stay wire fixing method | |
| CN111648359A (en) | Construction method of anchor rod pile | |
| CN215715593U (en) | Combined pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |