CN214832719U - Precast concrete crown beam and pile connection crown beam structure - Google Patents
Precast concrete crown beam and pile connection crown beam structure Download PDFInfo
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- CN214832719U CN214832719U CN202120206065.7U CN202120206065U CN214832719U CN 214832719 U CN214832719 U CN 214832719U CN 202120206065 U CN202120206065 U CN 202120206065U CN 214832719 U CN214832719 U CN 214832719U
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Abstract
The utility model discloses a precast concrete crown beam and pile connection crown beam structure, precast concrete crown beam is including the crown beam unit, be equipped with on the crown beam unit and reserve the cast-in-place hole, when the crown beam unit is pressed on the pile body, reserve the cast-in-place hole on the terminal surface upper portion of pile body, and the pile body and crown beam can be through reserving cast-in-place hole fixed connection, through reserving the cast-in-place hole and utilizing pile body fixed connection between crown beam and the crown beam. The prefabricated crown beams of the utility model are connected in a vertically lap joint manner, thereby facilitating construction; because the connection between the crown beam and the connection between the crown beam and the pile body adopt integrated connection, the construction process is reduced to a certain extent, and the construction efficiency is further improved.
Description
Technical Field
The utility model relates to a construction technical field is strutted to foundation pits such as building, subway especially relates to a roof beam structure is covered on excavation supporting pile top.
Background
The top beam is a reinforced concrete continuous beam arranged at the top of a foundation pit peripheral support or enclosure structure, and has the first function of connecting pile foundations such as cast-in-situ bored piles, rotary excavating piles and the like together to enhance the stability of a support structure and prevent the top edge of the foundation pit or a vertical shaft from collapsing, and the second function of bearing the horizontal extrusion force and the vertical shearing force of a steel support or a reinforced concrete support through a bracket.
The traditional crown beam construction mostly adopts cast-in-place construction, but the cast-in-place method has the following defects: the cast-in-place construction needs to support a template, bind reinforcing steel bars and pour concrete in situ. Firstly, the method wastes time and labor, greatly increases the construction time, consumes a large amount of human resources, and is difficult to adapt to the industrial social requirements; secondly, the construction quality of the cast-in-situ crown beam is difficult to guarantee, and engineering accidents can be induced.
For example, chinese patent document (application No. 201621076526.9) discloses a prefabricated crown beam construction method, which uses a novel method that, although the construction efficiency is greatly improved compared with a cast-in-place crown beam, the connection between the crown beam and the connection between the crown beam and the pile foundation still need to connect anchoring steel bars to cast a large amount of concrete, and the construction efficiency still has a large lifting space.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that prior art exists, the utility model provides a precast concrete crown beam and stake connection crown beam structure, improvement crown beam efficiency of construction and construction quality that can be very big, and easy operation, construction cost is lower.
In order to realize the above-mentioned purpose, the utility model discloses the technical scheme who takes is a precast concrete crown beam, the crown beam includes a plurality of crown beam units, be equipped with stake connection cast-in-place hole (2) and reserve cast-in-place hole (9) on crown beam unit (1), stake connection cast-in-place hole (2) and reserve cast-in-place hole (9) run through crown beam unit (1), reserve cast-in-place hole (9) and be located crown beam unit (1) middle part, both ends department that cast-in-place hole (2) are located crown beam unit (1) is connected to the stake, the overlap joint is in the same place between double-phase adjacent crown beam unit (1). The number of the reserved cast-in-place holes (9) can be selected to be a plurality according to requirements.
In an embodiment of the present invention, the crown beam unit (1) is in a shape of a long strip, and has a Z-shaped cross section.
In an embodiment of the present invention, the upper portion of one end of the crown beam unit (1) is protruded (3) in the axial direction of the crown beam, the lower portion of the other end is protruded (4) in the axial direction of the crown beam, the upper portion protruded (3) and the lower portion protruded (4) are matched in shape and size, and the two adjacent crown beam units (1) are connected by the upper portion protruded (3) and the lower portion protruded (4) in an overlapping manner.
In an embodiment of the present invention, there are two pile connecting cast-in-place holes (2) on each crown beam unit, which are respectively located at the upper protrusion (3) and the lower protrusion (4) of the crown beam unit (1), and the pile connecting cast-in-place hole (2) at the upper protrusion (3) of one crown beam unit (1) is matched with the pile connecting cast-in-place hole (2) at the lower protrusion (4) of the adjacent crown beam unit (1).
In an embodiment of the present invention, the pile connecting cast-in-place hole (2) and the reserved cast-in-place hole (9) are through holes with circular cross sections.
In an embodiment of the present invention, the upper portion of the crown beam unit (1) is provided with a hanging ring (5) for hanging.
A pile connection crown beam structure comprises the precast concrete crown beam and a pile body in any embodiment, wherein the crown beam unit (1) is used for pressing on the pile body, the pile connection cast-in-place hole (2) and the reserved cast-in-place hole (9) correspond to the upper end face of the pile body, the pile connection cast-in-place hole (2) of one adjacent crown beam unit (1) is communicated with the pile connection cast-in-place hole (2) of the adjacent crown beam unit (1), the pile body is fixedly connected with the crown beam unit (1), and the two adjacent crown beam units (1) are fixedly connected. The pile body and the crown beam units (1) are fixedly connected through reserved cast-in-place holes (9), and the two adjacent crown beam units (1) are fixedly connected through the pile connecting cast-in-place holes (2).
In an embodiment of the present invention, the diameter of the pile connecting cast-in-place hole (2) and the reserved cast-in-place hole (9) is larger than the diameter of the pile body. The upper projection (3) of the crown beam unit (1) is used for overlapping the lower projection (4) of the adjacent crown beam unit (1).
In an embodiment of the present invention, the pile body includes a main pile body rib (7), and the main pile body rib (7) extends upward into the pile connection cast-in-place hole (2).
A construction method of a pile connection crown beam structure comprises the steps of prefabricating crown beam units (1), sequentially overlapping the prefabricated crown beam units (1) on a pile body, and ensuring that pile connection cast-in-place holes (2) are located right above the pile body; and then, casting micro-expansion concrete (8) in the pile connecting cast-in-place hole (2) in situ, wherein the micro-expansion concrete (8) fills the pile connecting cast-in-place hole (2) so as to realize the fixed connection between the adjacent crown beam units (1).
In the prefabricated crown beam, the cross section size of the crown beam, the cross section sizes of the pile connection cast-in-place hole and the reserved cast-in-place hole, and the clear distance between the pile connection cast-in-place hole and the reserved cast-in-place hole are designed according to a specific foundation pit supporting scheme, and the length of the prefabricated crown beam is controlled to be 4M-7M generally.
The technical scheme has the following beneficial effects:
1. the prefabricated crown beams are connected in an up-down lap joint mode, construction is convenient, and the lap joint length of the crown beams can be finely adjusted during site construction.
2. The prefabricated crown beam is constructed in advance in a factory, so that the construction time is saved, and the construction quality is improved.
3. Because the connection between the crown beam and the connection between the crown beam and the pile body adopt integrated connection, the construction procedures are reduced to a certain extent, and the construction efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a crown beam according to an embodiment of the present invention;
FIG. 2 is another angle structure diagram of FIG. 1;
fig. 3 is a schematic structural view of a crown beam according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a crown beam according to an embodiment of the present invention;
FIG. 5 is a schematic view of the connection of the crown beam unit;
FIG. 6 is an enlarged view of the crown beam unit junction;
fig. 7 is a schematic view of a pile-connected crown beam structure according to an embodiment of the present invention.
Description of reference numerals: 1-crown beam unit, 2-crown beam pile connecting cast-in-place hole, 3-crown beam upper part protrusion, 4-crown beam lower part protrusion, 5-hanging ring, 6-crown beam main rib, 7-pile body extension steel bar, 8-micro expansion concrete and 9-reserved cast-in-place hole.
Detailed Description
The invention will be further described with reference to the following examples and figures 1 to 7.
As shown in fig. 1, a precast concrete crown beam structure is connected to stake, including crown beam unit 1, crown beam unit 1 be rectangular form and can press on the pile body, be equipped with stake connection cast-in-place hole 2 and reserve cast-in-place hole 9 on crown beam unit 1, when crown beam unit 1 presses on the pile body, stake connection cast-in-place hole 2 and reserve cast-in-place hole 9 are on the terminal surface upper portion of pile body, and pile body and crown beam can be through reserving cast-in-place hole 9 fixed connection, connect cast-in-place hole 2 and utilize pile body fixed connection through the stake between crown beam and the crown beam.
As shown in fig. 1, the whole crown beam 1 is in a zigzag shape, the upper part of the left upper part of the crown beam 1 is provided with an upper protrusion 3 protruding axially from the crown beam, the lower part of the right lower part of the crown beam 1 is provided with a lower protrusion 4 protruding axially from the crown beam, and the top of the crown beam unit 1 is provided with a hoisting ring 5 for hoisting during construction.
As shown in fig. 1 and 5, the upper protrusion 3 and the lower protrusion 4 are matched in size and shape, and the two crown beams can be connected with each other in an up-and-down overlapping manner through the upper protrusion 3 and the lower protrusion 4. This shape will facilitate the connection between the crown beams.
As shown in fig. 1 and 2, the pile connecting cast-in-place hole 2 vertically penetrates the crown beam unit 1 at the upper protrusion 3 and the lower protrusion 4, respectively, and the reserved cast-in-place hole 9 vertically penetrates the middle of the crown beam unit 1.
As shown in fig. 3 and 4, the main reinforcement 6 of the crown beam unit 1 penetrates through the crown beam unit 1 along the axial direction of the crown beam, and part of the main reinforcement 6 penetrates through the pile connecting cast-in-place hole 2 and the reserved cast-in-place hole 9.
As shown in fig. 1 and 5, after the crown beam units 1 are overlapped with each other, the pile connecting cast-in-place holes 2 can be approximately aligned up and down, and the diameter of the cross section of the pile connecting cast-in-place hole 2 is slightly larger than that of the pile body, so that the position between the crown beam units 1 can be adjusted.
As shown in fig. 5, the crown beam units 1 can be fixedly connected by using piles, and have strong connection strength.
As shown in fig. 6, the pile body main reinforcement 7 extends upwards to a proper height of the pile connecting cast-in-place hole 2 (which should meet the requirement of anchoring length), and then the micro-expansion concrete 8 is cast in the pile connecting cast-in-place hole 2 in situ, and the micro-expansion concrete 8 fills the pile connecting cast-in-place hole 2, so as to realize good fixed connection between the crown beam units 1.
Similarly, by using the reserved cast-in-place hole 9 in the middle of the crown beam unit 1, the pile body main reinforcement 7 extends upwards to the appropriate height of the reserved cast-in-place hole 9 (the requirement of anchoring length should be met), then the micro-expansion concrete 8 is poured in the pile reserved cast-in-place hole 9 in situ, and the reserved cast-in-place hole 9 is filled with the micro-expansion concrete 8, so that the stable connection between the crown beam unit 1 and the pile body is realized.
The utility model discloses a be equipped with on hat roof beam unit and reserve the cast-in-place hole, when hat roof beam unit presses on the pile body, reserve the cast-in-place hole on the terminal surface upper portion of pile body, and pile body and hat roof beam can be through reserving cast-in-place hole fixed connection, hat roof beam unit and hat between the roof beam unit through reserving the cast-in-place hole and utilizing pile body fixed connection. The prefabricated crown beam units are connected in an up-down lap joint mode, and construction is facilitated. The crown beam unit can be constructed in advance in a factory, so that the construction time is saved, and the construction quality is improved; because the connection between the crown beam unit and the connection between the crown beam unit and the pile body are integrally connected, the construction process is reduced to a certain extent, and the construction efficiency is further improved.
The above-mentioned embodiments are merely for explaining the present invention, and are not intended to limit the present invention, and any changes and substitutions made by the present invention without inventive work are all within the scope of the present invention.
Claims (9)
1. The precast concrete crown beam is characterized by comprising a plurality of crown beam units (1), wherein the crown beam units (1) are provided with pile connection cast-in-place holes (2) and reserved cast-in-place holes (9), the piles are connected with the cast-in-place holes (2) and the reserved cast-in-place holes (9) and penetrate through the crown beam units (1), the reserved cast-in-place holes (9) are located in the middle of the crown beam units (1), the pile connection cast-in-place holes (2) are located at two ends of the crown beam units (1), and two adjacent crown beam units (1) are connected together in a lap joint mode.
2. The precast concrete crown beam according to claim 1, wherein the crown beam unit (1) has an elongated shape and a "Z" shape in cross section.
3. Precast concrete crown beam according to claim 1, characterized in that the crown beam unit (1) has an upper part at one end with an upper protrusion (3) protruding axially from the crown beam and a lower part at the other end with a lower protrusion (4) protruding axially from the crown beam, the upper protrusion (3) and the lower protrusion (4) being matched in shape and size, and two adjacent crown beam units (1) being connected to each other by overlapping the upper protrusion (3) and the lower protrusion (4) one above the other.
4. Precast concrete crown beam according to claim 3, characterized in that there are two of said pile connecting cast-in-place holes (2) on each crown beam unit, respectively at the upper projection (3) and the lower projection (4) of the crown beam unit (1), and the pile connecting cast-in-place hole (2) at the upper projection (3) of one crown beam unit (1) is fitted with the pile connecting cast-in-place hole (2) at the lower projection (4) of the crown beam unit (1) adjacent thereto.
5. The precast concrete crown beam according to claim 1, wherein the pile connecting cast-in-place hole (2) and the reserved cast-in-place hole (9) are through holes having a circular cross section.
6. The precast concrete crown beam according to any one of claims 1 to 5, wherein a hoist ring (5) for hoisting is provided at an upper portion of the crown beam unit (1).
7. A pile-connected crown beam structure, characterized by comprising the precast concrete crown beam and a pile body according to any one of claims 1 to 6, wherein the crown beam units (1) are used for pressing on the pile body, the pile-connected cast-in-place holes (2) and the reserved cast-in-place holes (9) correspond to the upper end surface of the pile body, the pile-connected cast-in-place hole (2) of one adjacent crown beam unit (1) is communicated with the pile-connected cast-in-place hole (2) of the adjacent crown beam unit (1), the pile body is fixedly connected with the crown beam unit (1), and the two adjacent crown beam units (1) are fixedly connected.
8. A crown beam structure according to claim 7, characterized in that the pile connecting cast-in-place hole (2) and the reserved cast-in-place hole (9) are larger in diameter than the pile body.
9. A crown beam structure according to claim 7 or 8, characterized in that the pile body comprises pile body main reinforcements (7), which pile body main reinforcements (7) extend up into the pile connecting cast-in-place hole (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120206065.7U CN214832719U (en) | 2021-01-26 | 2021-01-26 | Precast concrete crown beam and pile connection crown beam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120206065.7U CN214832719U (en) | 2021-01-26 | 2021-01-26 | Precast concrete crown beam and pile connection crown beam structure |
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| Publication Number | Publication Date |
|---|---|
| CN214832719U true CN214832719U (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120206065.7U Active CN214832719U (en) | 2021-01-26 | 2021-01-26 | Precast concrete crown beam and pile connection crown beam structure |
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| CN (1) | CN214832719U (en) |
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2021
- 2021-01-26 CN CN202120206065.7U patent/CN214832719U/en active Active
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