CN212270943U - Prefabricated assembled steel concrete combined supporting pile - Google Patents
Prefabricated assembled steel concrete combined supporting pile Download PDFInfo
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- CN212270943U CN212270943U CN201921285423.7U CN201921285423U CN212270943U CN 212270943 U CN212270943 U CN 212270943U CN 201921285423 U CN201921285423 U CN 201921285423U CN 212270943 U CN212270943 U CN 212270943U
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Abstract
The utility model relates to a prefabricated assembled steel concrete combined supporting pile, which is formed by welding or flange connection of an upper steel pipe pile and a lower prefabricated concrete pile; the length of the upper section of steel pipe pile is 6-18 m, the length of the lower section of precast concrete pile is 6-30 m, and two sides of the upper section of steel pipe pile are respectively provided with a high-pressure grouting pipe. The prefabricated assembled steel concrete combined supporting pile is pressed into a soil layer simultaneously with the steel concrete combined supporting pile in the process of forming a hole in a soil body by high-pressure grouting and pile feeding through the high-pressure grouting and pile feeding integrated machine, so that the hole forming and pile feeding are completed at one time. The utility model discloses a form that steel pipe and precast concrete pile combined together, the upper segment stake make things convenient for the excavation and stagnant water construction in the foundation ditch, and lower segment stake is below the hole end, and the compressive property of full play precast concrete pile reaches and the frictional force of the soil body, and the construction is simple, and is efficient, but steel cyclic utilization practices thrift advantages such as cost.
Description
Technical Field
The utility model belongs to the technical field of foundation ditch engineering, a prefabricated pin-connected panel steel concrete combination support pile and construction method thereof is related to.
Background
As the number and height of high-rise buildings increase, the foundation burial depth also increases. After the 90 s, the economy of China is rapidly developed, the urban land price is continuously increased, the space utilization rate is improved, numerous super high-rise buildings appear, and higher and tighter requirements are put forward on the foundation pit excavation technology, namely, the stability of a side slope is ensured, and the requirements of deformation control are met, so that the safety of buildings, underground pipelines, roads and the like around the foundation pit is ensured.
Meanwhile, in order to adapt to increasingly violent competition of the building market, factors of improving the mechanization degree of earthwork excavation and transportation, shortening the construction period of earthwork, reducing the engineering cost, improving the economic benefit and the like are also considered, a reinforced concrete structure support is introduced, but the defects that the reinforced concrete structure support is heavy in self weight, large in arrangement area, incapable of recycling materials, long in construction period for installation and removal, capable of generating noise, vibration and fragment flying out during blasting removal, and unfavorable for deformation control of a foundation pit wall body due to the fact that the reinforced concrete structure support cannot be supported along with excavation in the process construction process period are considered.
To the above shortcoming, the utility model relates to a prefabricated pin-connected panel reinforced concrete combination supports stake, this technique adopt high-pressure slip casting pile feeder all-in-one to support the stake with reinforced concrete combination and impress simultaneously in the soil layer at high-pressure slip casting cutting soil body pore-forming in-process, realize that pore-forming pile feeder once accomplishes. The prefabricated assembled steel concrete combined supporting pile is formed by connecting an upper pile steel pipe and a lower pile prefabricated concrete pile through welding or flanges. The length of the upper section pile steel pipe can be adjusted according to actual needs, the length of the lower section pile precast concrete pile can be adjusted according to actual needs, and two sides of the precast concrete pile are respectively provided with a high-pressure grouting guide pipe. The form that adopts steel pipe and precast concrete pile to combine together, the upper segment pile is in the foundation ditch, and convenient excavation and stagnant water construction, lower segment pile are below the hole bottom, the compressive property of full play precast concrete pile and the frictional force with the soil body, and after the foundation ditch was accomplished, the steel pipe was cut off reuse, and the construction is simple, and is efficient, but steel cyclic utilization practices thrift advantages such as cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a prefabricated pin-connected panel reinforced concrete combination support pile according to the weak point of above-mentioned prior art, this technique is pressed in the soil layer simultaneously with reinforced concrete combination support pile in high-pressure slip casting cutting soil body pore-forming in-process through high-pressure slip casting pile feeding all-in-one, realizes that pore-forming pile feeding once accomplishes. The form that adopts steel pipe and precast concrete pile to combine together, the upper segment pile is in the foundation ditch, and convenient excavation and stagnant water construction, lower segment pile are below the hole bottom, the compressive property of full play precast concrete pile and the frictional force with the soil body, and after the foundation ditch was accomplished, the steel pipe was cut off reuse, and the construction is simple, and is efficient, but steel cyclic utilization practices thrift advantages such as cost.
The purpose of the utility model can be realized through the following technical scheme:
a prefabricated assembled type steel concrete combined supporting pile is formed by connecting an upper section of steel pipe pile and a lower section of prefabricated concrete pile through welding or flanges; the length of the upper section of steel pipe pile is 6-18 m, the length of the lower section of precast concrete pile is 6-30 m, and two sides of the upper section of steel pipe pile are respectively provided with a high-pressure grouting pipe.
The lower-section precast concrete pile is a precast tubular pile and a precast square pile which meet the design value of the bearing capacity of the pile foundation, the diameter of the tubular pile can be phi 400m, phi 500mm and phi 600mm, the side length of the precast square pile can be 300m, 350mm, 400mm, 450mm, 500mm, 550mm and 600mm, the diameter of the upper-section steel pipe pile can be 273mm, 325mm, 355mm and 377 mm.
The pipe diameter of the high-pressure grouting pipe is 50 mm.
The high-pressure grouting pipe is simultaneously formed with a hole in the grouting process, the diameter of the formed hole is 0.4-0.6 m, and the diameter of the grouting reaming hole is 0.6-1.20 m.
The high-pressure grouting pipe is used for grouting under pressure, can jet air and can perform grouting, and the grouting pressure is not less than 1 MPa.
The prefabricated assembled steel concrete combined supporting pile is constructed according to an angle which is 45-90 degrees with the ground construction angle.
The high-pressure grouting pipe and the precast concrete pile form a whole through the steel hoop.
Compared with the prior art:
1. the technology adopts the high-pressure grouting and pile feeding integrated machine to press the combined supporting pile and the steel concrete into the soil layer simultaneously in the process of forming holes in the soil body by high-pressure grouting and cutting, so that the hole forming and pile feeding are completed at one time.
2. The form that adopts steel pipe and precast concrete pile to combine together, the upper segment pile is in the foundation ditch, and convenient excavation and stagnant water construction, lower segment pile are below the hole bottom, the compressive property of full play precast concrete pile and the frictional force with the soil body, and after the foundation ditch was accomplished, the steel pipe was cut off reuse, and the construction is simple, and is efficient, but steel cyclic utilization practices thrift advantages such as cost.
Drawings
FIG. 1 is a schematic cross-sectional view of a prefabricated assembled steel-concrete composite supporting pile
1 steel pipe 2 precast concrete pile
FIG. 2 is a schematic cross-sectional view of a prefabricated assembled steel-concrete composite supporting pile
3 high-pressure grouting pipe 4 grouting body
FIG. 3 is a schematic cross-sectional view of a prefabricated assembled steel-concrete composite supporting pile
2 precast concrete square pile 3 high-pressure grouting pipe 4 grouting body
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
A prefabricated assembled steel-concrete combined supporting pile is characterized by that it is pressed into soil layer simultaneously with steel-concrete combined supporting pile in the course of forming hole by high-pressure grouting and cutting soil body by means of high-pressure grouting pile-feeding integrated machine so as to implement one-step completion of hole-forming pile-feeding. The prefabricated assembled type steel concrete combined supporting pile is formed by connecting an upper pile steel pipe 1 and a lower pile prefabricated concrete pile 2 through welding or flanges. Two sides of the precast concrete pile are respectively provided with a high-pressure grouting pipe 3.
A construction method of a prefabricated assembled type steel concrete combined supporting pile is characterized by comprising the following steps:
(1) setting out a real model according to the construction drawing;
(2) assembling and splicing the steel pipe 1 and the precast concrete pile 2 to form a precast assembled type steel-concrete combined supporting pile according to design requirements, and meanwhile, positioning the high-pressure grouting and pile feeding integrated machine device, and moving the high-pressure grouting and pile feeding integrated machine to a position to be constructed;
(3) starting a background air compressor to provide compressed air for the high-pressure grouting and pile feeding integrated machine;
(4) starting a power device, adjusting a construction angle, hoisting the prefabricated assembled type steel-concrete combined supporting pile to a specified position, and spraying air or spraying grout 4 to cut a soil body along the prefabricated assembled type steel-concrete combined supporting pile under the action of compressed air; and the high-pressure grouting cutting soil body and the steel concrete combined supporting pile are pressed into the soil layer simultaneously in the hole forming process.
(5) Continuously injecting air or spraying grout 4 until the pile bottom is pressed down to the designed elevation; and grouting the composite pile and the precast concrete pile 2 through the high-pressure grouting pipe 3 to form a stiff composite pile.
(6) Closing the power device of the high-pressure grouting and pile feeding integrated machine, and disconnecting the high-pressure grouting pipe 3 from the prefabricated assembled type steel concrete combined supporting pile;
(7) and (3) shifting the high-pressure grouting and pile-feeding integrated machine, and repeating the steps (2) - (6) to construct the next prefabricated assembled type reinforced concrete combined supporting pile.
Claims (7)
1. A prefabricated assembled type steel concrete combined supporting pile is characterized in that the prefabricated assembled type steel concrete combined supporting pile is formed by connecting an upper section of steel pipe pile and a lower section of prefabricated concrete pile through welding or flanges; the length of the upper section of steel pipe pile is 6-18 m, the length of the lower section of precast concrete pile is 6-30 m, and two sides of the upper section of steel pipe pile are respectively provided with a high-pressure grouting pipe.
2. The prefabricated assembled steel-concrete combined supporting pile as claimed in claim 1, wherein the lower prefabricated concrete pile is a prefabricated pipe pile and a prefabricated square pile which meet the design value of pile foundation bearing capacity, the diameters of the pipe piles are phi 400m, phi 500mm and phi 600mm, the side lengths of the prefabricated square pile are 300m, 350mm, 400mm, 450mm, 500mm, 550mm and 600mm, the upper steel pipe pile is a steel pipe pile, and the diameters of the steel pipes are 273mm, 325mm, 355mm and 377 mm.
3. The precast assembled steel-concrete composite supporting pile according to claim 1, wherein the pipe diameter of the high-pressure grouting pipe is 50 mm.
4. The precast assembled steel-concrete combined supporting pile according to claim 1, wherein the high-pressure grouting pipe is simultaneously provided with a hole during grouting, the diameter of the hole is 0.4-0.6 m, and the diameter of the grouting reaming hole is 0.6-1.20 m.
5. The precast assembled steel-concrete combined supporting pile according to claim 1, wherein the high-pressure grouting pipe is grouting under pressure, and can inject air and grout, and the grouting pressure is not less than 1 MPa.
6. The prefabricated assembled steel-concrete composite support pile as recited in claim 1, wherein the prefabricated assembled steel-concrete composite support pile is constructed at an angle of 45-90 ° with respect to the ground.
7. The precast assembled steel-concrete composite supporting pile according to claim 1, wherein the high-pressure grouting pipe is integrated with the precast concrete pile through a steel hoop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921285423.7U CN212270943U (en) | 2019-08-07 | 2019-08-07 | Prefabricated assembled steel concrete combined supporting pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921285423.7U CN212270943U (en) | 2019-08-07 | 2019-08-07 | Prefabricated assembled steel concrete combined supporting pile |
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| CN212270943U true CN212270943U (en) | 2021-01-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528532A (en) * | 2019-08-07 | 2019-12-03 | 上海城地建设股份有限公司 | A kind of precast splice type steel concrete combined support stake and its construction method |
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2019
- 2019-08-07 CN CN201921285423.7U patent/CN212270943U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528532A (en) * | 2019-08-07 | 2019-12-03 | 上海城地建设股份有限公司 | A kind of precast splice type steel concrete combined support stake and its construction method |
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