CN216379496U - Composite precast pile with high bearing capacity - Google Patents
Composite precast pile with high bearing capacity Download PDFInfo
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- CN216379496U CN216379496U CN202123143667.1U CN202123143667U CN216379496U CN 216379496 U CN216379496 U CN 216379496U CN 202123143667 U CN202123143667 U CN 202123143667U CN 216379496 U CN216379496 U CN 216379496U
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- precast pile
- steel pipe
- reinforced concrete
- concrete precast
- central steel
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- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 83
- 239000010959 steel Substances 0.000 claims abstract description 83
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 59
- 239000004568 cement Substances 0.000 claims abstract description 22
- 230000003014 reinforcing Effects 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 238000007569 slipcasting Methods 0.000 claims 6
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000002689 soil Substances 0.000 description 8
- 230000001965 increased Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000023298 conjugation with cellular fusion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000001737 promoting Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000021037 unidirectional conjugation Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
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Abstract
The application relates to the field of precast piles, and discloses a composite precast pile with high bearing capacity, which comprises a reinforced concrete precast pile, wherein the reinforced concrete precast pile is driven into the ground, a central steel pipe is pre-embedded in the middle of the reinforced concrete precast pile, the central steel pipe is arranged along the length direction of the reinforced concrete precast pile, the central steel pipe penetrates through the reinforced concrete precast pile, a cement expansion head is arranged at the bottom end of the reinforced concrete precast pile, and the cement expansion head is formed by high-pressure rotary jet grouting through a rotary nozzle extending into the pile bottom from the central steel pipe. This application has the bearing capacity that promotes the precast pile, reduces the effect of raw materials consumption.
Description
Technical Field
The application relates to the field of precast piles, in particular to a composite precast pile with high bearing capacity.
Background
The precast pile is generally referred to as a pre-piled cement-soil pile. The pre-built cement soil pile is called as a precast pile for short, and is suitable for foundation treatment of silt, mucky soil, cohesive soil, silt soil, artificial filling soil and the like. The foundation is one of the most important components of the building as an important member for bearing the upper load of the building.
The bearing capacity of the precast pile foundation is determined according to the property of foundation rock soil and the property of the material of the pile, and the bearing capacity of the precast pile is improved mainly by increasing the size of the pile body of the precast pile and prolonging the pile length, namely the depth of the precast pile into the rock soil.
In the process of implementing the application, the inventor finds that at least the following problems exist in the technology: the bearing capacity of the precast pile is improved by increasing the size of the pile body of the precast pile and the length of the precast pile, the surrounding environment is influenced during construction, and meanwhile, the material consumption is large.
SUMMERY OF THE UTILITY MODEL
In order to promote the bearing capacity of precast pile when reducing influence surrounding environment, this application provides the compound precast pile of high bearing capacity.
The application provides a compound precast pile of high bearing capacity adopts following technical scheme:
the utility model provides a compound precast pile of high bearing capacity, includes reinforced concrete precast pile, reinforced concrete precast pile squeezes into the underground, pre-buried central steel pipe in the middle of the reinforced concrete precast pile, central steel pipe is followed reinforced concrete precast pile length direction sets up, central steel pipe runs through reinforced concrete precast pile, reinforced concrete precast pile bottom is provided with the cement enlarged footing, the cement enlarged footing is through following the rotatory nozzle high pressure jet grouting at the bottom of central steel pipe stretches into the pile forms.
Through adopting above-mentioned technical scheme, when the construction, squeeze into the underground with reinforced concrete precast pile, then utilize the rig to bore into the bottom of reinforced concrete precast pile inside central steel pipe, then utilize the rotatory nozzle of installing on the drill bit to carry out high pressure jet grouting at the pile bottom to form cement enlarged footing, promote precast pile bearing capacity greatly when not increasing pile body size, in addition, still reduced the consumption of raw materials, played environmental protection and energy saving's effect.
Optionally, the central steel pipe is filled with cement slurry.
By adopting the technical scheme, after the cement expansion head is formed, cement slurry is filled into the central steel pipe, and the overall strength of the precast pile is further improved.
Optionally, a reinforcing block is arranged on the outer wall of the reinforced concrete precast pile, a grouting groove is formed in the top of the reinforcing block, a communicating steel pipe is arranged at a position, close to the grouting groove, of the central steel pipe, the communicating steel pipe is communicated with the central steel pipe and the grouting groove, an expansion portion is arranged at the grouting groove, and the expansion portion is formed by high-pressure grouting in the grouting groove.
By adopting the technical scheme, when grouting is carried out in the central steel pipe, high-pressure grouting is carried out on the communicating steel pipe and the grouting groove synchronously, so that an expansion part is formed at the grouting groove, and the bearing capacity of the precast pile is promoted.
Optionally, a guide inclined plane is arranged on one side, away from the reinforced concrete precast pile, of the reinforcing block.
By adopting the technical scheme, the guide inclined plane is utilized to guide in the process of driving the reinforced concrete precast pile into the ground, so that the pile driving resistance is reduced.
Optionally, the reinforcing blocks are arranged in a plurality of groups in the vertical direction, and each group of reinforcing blocks is arranged in the circumferential direction of the central steel pipe.
By adopting the technical scheme, the plurality of reinforcing blocks are arranged, so that the integral bearing capacity of the reinforced concrete precast pile is better.
Optionally, a first limiting part is arranged on the outer wall of the central steel pipe, the first limiting part is embedded in the reinforced concrete precast pile, and the first limiting part comprises a first limiting rod horizontally arranged and a first connecting rod connecting the first limiting rod and the central steel pipe.
By adopting the technical scheme, in the process of piling, the first limiting part is utilized to axially limit the central steel pipe, so that the possibility of relative motion between the central steel pipe and the reinforced concrete precast pile along the axial direction of the central steel pipe is reduced, and the connection reliability of the central steel pipe and the reinforced concrete precast pile is improved.
Optionally, a second limiting part is arranged on the outer wall of the central steel pipe, the second limiting part is embedded in the reinforced concrete precast pile, and the second limiting part comprises a second limiting rod vertically arranged and a second connecting rod connecting the second limiting rod and the central steel pipe.
By adopting the technical scheme, the second limiting part is utilized to radially limit the central steel pipe, so that the possibility of relative motion between the central steel pipe and the reinforced concrete precast pile along the radial direction of the central steel pipe is reduced.
Optionally, the first limiting part and the second limiting part are provided with a plurality of groups in the vertical direction, each group of the first limiting part is arranged in the circumferential direction of the central steel pipe, each group of the second limiting part is arranged in the circumferential direction of the central steel pipe, and the first limiting part and the second limiting part are arranged in a staggered manner.
Through adopting above-mentioned technical scheme, utilize first locating part with the mating reaction of second locating part, further strengthen the joint strength of reinforced concrete precast pile and central steel pipe, make whole precast pile intensity higher, help promoting the bearing capacity of precast pile.
In summary, the present application includes at least one of the following beneficial technical effects:
1. during construction, the reinforced concrete precast pile is driven into the ground, then the bottom of the reinforced concrete precast pile is drilled into the center steel pipe by a drilling machine, and then high-pressure rotary spraying grouting is carried out at the pile bottom by a rotary nozzle arranged on a drill bit, so that a cement expanded head is formed, the bearing capacity of the precast pile is greatly improved while the size of a pile body is not increased, in addition, the consumption of raw materials is reduced, and the effects of environmental protection and energy conservation are achieved;
2. when grouting is carried out inside the central steel pipe, high-pressure grouting is carried out on the communicating steel pipe and the grouting groove synchronously, so that an expansion part is formed at the grouting groove, and the bearing capacity of the precast pile is improved;
3. utilize first locating part with the mating reaction of second locating part, further strengthen the joint strength of reinforced concrete precast pile and central steel pipe, make whole precast pile intensity higher, help promoting the bearing capacity of precast pile.
Drawings
Fig. 1 is a schematic view of a mounted state of an embodiment of the present application.
Fig. 2 is a schematic overall structure diagram of an embodiment of the present application.
Fig. 3 is a schematic view showing a structure of a center steel pipe according to an embodiment of the present application.
Fig. 4 is a schematic diagram showing the positions of the communication steel pipes in the embodiment of the present application.
Description of reference numerals:
1. prefabricating a pile by using reinforced concrete; 2. a central steel pipe; 3. cement expanding heads; 4. a reinforcing block; 41. grouting grooves; 42. a guide slope; 43. an enlarging portion; 5. communicating the steel pipes; 6. a first limit piece; 61. a first limit rod; 62. a first connecting rod; 7. a second limiting member; 71. a second limiting rod; 72. a second connecting rod.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses compound precast pile of high bearing capacity. Referring to fig. 1 and 2, the composite precast pile with high bearing capacity comprises a reinforced concrete precast pile 1, wherein the reinforced concrete precast pile 1 is a square precast pile, and the reinforced concrete precast pile 1 is vertically driven into the ground. The cement expansion head 3 is arranged at the bottom end of the reinforced concrete precast pile 1, and the bearing capacity of the precast pile is improved while the size of the pile body is not increased by using the cement expansion head 3.
Referring to fig. 1 and 2, a central steel pipe 2 is pre-embedded in the middle of a reinforced concrete precast pile 1, the central steel pipe 2 is arranged along the length direction of the reinforced concrete precast pile 1, and the central steel pipe 2 penetrates through the reinforced concrete precast pile 1. After the reinforced concrete precast pile 1 is driven into the ground, a drilling machine is used for drilling into the bottom of the reinforced concrete precast pile 1 from the inside through a steel pipe, and then high-pressure rotary spraying grouting is carried out on the bottom of the reinforced concrete precast pile 1 by using a rotary nozzle arranged on a drill bit, so that a cement expansion head 3 is formed. And cement slurry is filled in the central steel pipe 2, so that the composite precast pile has higher strength.
Referring to fig. 2 and 3, in order to make the connection strength between the central steel pipe 2 and the reinforced concrete precast pile 1 better, a plurality of groups of first limiting members 6 are disposed on the outer wall of the central steel pipe 2 along the vertical direction, in this embodiment, two groups are taken as an example, each group of first limiting members 6 is disposed along the circumferential direction of the central steel pipe 2, and the first limiting members 6 are pre-embedded inside the reinforced concrete precast pile 1. Each first limiting member 6 comprises a first limiting rod 61 and a first connecting rod 62, the first limiting rod 61 is horizontally arranged on one side of the central steel pipe 2, one end of the first connecting rod 62 is fixedly connected with the first limiting rod 61, and the other end of the first connecting rod is fixedly connected with the central steel pipe 2.
Referring to fig. 2 and 3, a plurality of sets of second limiting members 7 are disposed on the outer wall of the central steel pipe 2 along the vertical direction, in this embodiment, two sets are taken as an example, each set of second limiting members 7 is disposed along the circumferential direction of the central steel pipe 2, the second limiting members 7 are embedded inside the reinforced concrete precast pile 1, and a single set of the first limiting members 6 and a single set of the second limiting members 7 are disposed in a staggered manner.
Referring to fig. 2 and 3, each of the second limiting members 7 includes a second limiting rod 71 and a second connecting rod 72, the second limiting rod 71 is disposed on one side of the central steel pipe 2, the second limiting rod 71 is disposed parallel to the central steel pipe 2, one end of the second connecting rod 72 is fixedly connected to the second limiting rod 71, and the other end of the second connecting rod is fixedly connected to the central steel pipe 2.
Referring to fig. 2 and 3, the first limiting part 6 is used for axially limiting the central steel pipe 2, the second limiting part 7 is used for radially limiting the central steel pipe 2, and the connection strength between the reinforced concrete precast pile 1 and the central steel pipe 2 is enhanced through the cooperation of the first limiting part 6 and the second limiting part 7, so that the strength of the whole precast pile is higher, and the bearing capacity of the precast pile is improved.
Referring to fig. 2, in order to further enhance the bearing capacity of the composite precast pile, a plurality of groups of reinforcing blocks 4 are arranged on the reinforced concrete precast pile 1 along the vertical direction, in this embodiment, three groups are taken as an example, and four reinforcing blocks 4 are arranged around the reinforced concrete precast pile 1. The reinforcing blocks 4 and the reinforced concrete precast pile 1 are cast into a whole, and a guide inclined plane 42 is arranged on one side of each reinforcing block 4, which is far away from the reinforced concrete precast pile 1.
Referring to fig. 2 and 4, a grouting groove 41 is formed in the top of each reinforcing block 4, a communication steel pipe 5 is arranged between the central steel pipe 2 and the grouting groove 41, one end of the communication steel pipe 5 is communicated with the central steel pipe 2, and the other end of the communication steel pipe is communicated with the grouting groove 41. When grouting the inside of the central steel pipe 2, the cement grout flows out of the grouting groove 41, thereby forming an enlarged portion 43 at the grouting groove 41, thereby further enhancing the load-bearing capacity of the composite precast pile.
The implementation principle of the composite precast pile with high bearing capacity in the embodiment of the application is as follows: during construction, the reinforced concrete precast pile 1 pre-embedded with the central steel pipe 2 is driven into the ground, then a drilling machine drills the bottom of the reinforced concrete precast pile 1 in the central steel pipe 2, high-pressure rotary spraying grouting is carried out on the bottom of the reinforced concrete precast pile 1 by utilizing a rotary nozzle arranged on a drill bit to form a cement expansion head 3, after the cement expansion head 3 is formed, high-pressure grouting is carried out on the central steel pipe 2, so that cement slurry flows out of the grouting groove 41, and an expansion part 43 is formed at the grouting groove 41.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a compound precast pile of high bearing capacity, includes reinforced concrete precast pile (1), underground, its characterized in that are squeezed into in reinforced concrete precast pile (1): center steel pipe (2) are pre-buried in the middle of reinforced concrete precast pile (1), center steel pipe (2) are followed reinforced concrete precast pile (1) length direction sets up, center steel pipe (2) run through reinforced concrete precast pile (1), reinforced concrete precast pile (1) bottom is provided with cement enlarged footing (3), cement enlarged footing (3) are through following center steel pipe (2) stretch into the rotary nozzle high pressure jet grouting at the bottom of the pile and form.
2. A high load bearing composite precast pile according to claim 1, characterized in that: and cement slurry is filled in the central steel pipe (2).
3. A high load bearing composite precast pile according to claim 1, characterized in that: be provided with boss (4) on reinforced concrete precast pile (1) the outer wall, boss (4) top is provided with slip casting groove (41), central steel pipe (2) are close to the position of slip casting groove (41) is provided with intercommunication steel pipe (5), intercommunication steel pipe (5) intercommunication central steel pipe (2) with slip casting groove (41), slip casting groove (41) department sets up expansion portion (43), expansion portion (43) through to high pressure slip casting forms in slip casting groove (41).
4. A high load bearing composite precast pile according to claim 3, characterized in that: one side of the reinforcing block (4) far away from the reinforced concrete precast pile (1) is provided with a guide inclined plane (42).
5. A high load bearing composite precast pile according to claim 3, characterized in that: the reinforcing blocks (4) are arranged in a plurality of groups in the vertical direction, and each group of reinforcing blocks (4) is arranged in the circumferential direction of the central steel pipe (2).
6. A high load bearing composite precast pile according to claim 1, characterized in that: be provided with first locating part (6) on the outer wall of center steel pipe (2), first locating part (6) are pre-buried in reinforced concrete precast pile (1), first locating part (6) including the first gag lever post (61) that the level set up and connect first gag lever post (61) with head rod (62) of center steel pipe (2).
7. A high load bearing composite precast pile according to claim 6, characterized in that: the outer wall of the central steel pipe (2) is provided with a second limiting part (7), the second limiting part (7) is embedded in the reinforced concrete precast pile (1), and the second limiting part (7) comprises a second limiting rod (71) which is vertically arranged and a second connecting rod (72) which is used for connecting the second limiting rod (71) with the central steel pipe (2).
8. A high load bearing composite precast pile according to claim 7, wherein: the first limiting parts (6) and the second limiting parts (7) are provided with a plurality of groups in the vertical direction, each group of the first limiting parts (6) is arranged in the circumferential direction of the central steel pipe (2), each group of the second limiting parts (7) is arranged in the circumferential direction of the central steel pipe (2), and the first limiting parts (6) and the second limiting parts (7) are arranged in a staggered mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123143667.1U CN216379496U (en) | 2021-12-14 | 2021-12-14 | Composite precast pile with high bearing capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123143667.1U CN216379496U (en) | 2021-12-14 | 2021-12-14 | Composite precast pile with high bearing capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216379496U true CN216379496U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123143667.1U Active CN216379496U (en) | 2021-12-14 | 2021-12-14 | Composite precast pile with high bearing capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216379496U (en) |
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2021
- 2021-12-14 CN CN202123143667.1U patent/CN216379496U/en active Active
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