CN113622824A - Diameter expanding equipment of concrete cast-in-place pile and construction method of concrete cast-in-place pile - Google Patents
Diameter expanding equipment of concrete cast-in-place pile and construction method of concrete cast-in-place pile Download PDFInfo
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- CN113622824A CN113622824A CN202110487762.9A CN202110487762A CN113622824A CN 113622824 A CN113622824 A CN 113622824A CN 202110487762 A CN202110487762 A CN 202110487762A CN 113622824 A CN113622824 A CN 113622824A
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- 238000010276 construction Methods 0.000 title claims abstract description 28
- 239000002689 soil Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- 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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Paleontology (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a diameter expanding device of a concrete filling pile, which comprises: the outer sleeve part and the inner sleeve part are suitable for being mutually sleeved with each other; wherein, still include: and the ground breaking structure is arranged on the lower end face of the outer sleeve part, and a gap for concrete to pass through along the axial direction of the outer sleeve part is formed between the ground breaking structure and the outer sleeve part, wherein the ground breaking structure is a structure with a wide upper part and a narrow lower part. The invention also provides a construction method of the concrete cast-in-place pile by adopting the expanding equipment.
Description
Technical Field
The invention relates to a diameter expanding device of a concrete cast-in-place pile and a construction method of the concrete cast-in-place pile.
Background
In foundation construction, in order to fill the bearing capacity of a pile, a radially enlarged structure is formed at the bottom of the pile through construction; however, in order to further increase the bearing capacity of the pile body, chinese patent documents CN 107794918A, CN 102444120a and CN111395312A disclose a construction method of a cast-in-place pile in which a radially enlarged structure is formed at both the bottom and the body of the pile, respectively, and a pile body constructed by the method. The construction method described in this patent document is to form the radially enlarged structure by ramming from bottom to top in the order of forming the radially enlarged structure. The prior art above discloses expanding devices, i.e. inner and outer sleeves that are nested with each other, the working end of the bottom of the outer sleeve is completely through, the implementation of the ground breaking action depends completely on the peripheral structure of the outer sleeve and the tamping surface of the working end of the inner sleeve; when the pipe is sunk after being sleeved, the effect is that the bottom plane of a column body is rammed, the soil breaking capacity is poor, and therefore the construction efficiency is low.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is how to provide a concrete cast-in-place pile expanding device with strong ground breaking capacity and a construction method of the concrete cast-in-place pile.
The invention provides a diameter expanding device of a concrete filling pile, which comprises: the outer sleeve part and the inner sleeve part are suitable for being mutually sleeved with each other; wherein, still include: and the ground breaking structure is arranged on the lower end face of the outer sleeve part, and a gap for concrete to pass through along the axial direction of the outer sleeve part is formed between the ground breaking structure and the outer sleeve part, wherein the ground breaking structure is a structure with a wide upper part and a narrow lower part.
The diameter expanding equipment for the concrete cast-in-place pile comprises a casing, wherein the casing is provided with an outer sleeve part, and the outer sleeve part is provided with a lower end face.
The diameter expanding equipment for the cast-in-place concrete pile comprises a V-shaped assembly, a first V-shaped plate part and a second V-shaped plate part, wherein the first V-shaped plate part and the second V-shaped plate part are respectively and radially arranged on the lower end face of the outer sleeve part in a spanning mode.
In the diameter expanding equipment for the cast-in-place concrete pile, the V-shaped assembly is fixedly connected with the inner wall of the outer sleeve part through the outer sleeve hoop, and the upper end face of the V-shaped assembly is of a horizontal step structure and is axially matched with the lower end face of the outer sleeve part to bear force; and the outer diameter of the inner tube head at the lower end of the inner tube component is larger than the inner diameter of the outer tube hoop.
When the inner sleeve component and the outer sleeve component are completely sleeved, the lower end face of the inner pipe head is attached to the upper end face of the outer pipe hoop, and bottom sealing is achieved.
The invention also provides a construction method of the concrete cast-in-place pile, which comprises the following steps:
a. adopting any one of the expanding devices to form a hole at the pile position, and sinking the hole to a first expanding position;
b. pouring the flow plastic concrete into the first diameter expanding position, and applying a vertical downward acting force to the flow plastic concrete at the first diameter expanding position by operating the diameter expanding equipment to radially extrude and expand the flow plastic concrete to form a first diameter expanding structure;
c. applying a downward acting force to the flow plastic concrete at the first diameter expansion position by using the diameter expansion equipment, and penetrating through a flow plastic concrete body while radially extruding and expanding the flow plastic concrete;
d. sinking the expanding device downwards to a second expanding position;
e. pouring the liquid plastic concrete into the second expanding position, and applying a vertical downward acting force to the liquid plastic concrete at the second expanding position by operating the pore-forming device to radially extrude and expand the liquid plastic concrete to form a second expanding structure;
f. and e, repeating the steps c to e until the construction of the bottom expanding structure at the bottom expanding position is completed, and pouring the flow-plastic concrete to complete the pile body construction of the cast-in-place pile.
The construction method of the cast-in-place concrete pile further comprises a step of inserting a reinforcement cage into the flow plastic concrete after the step f.
In the construction method of the concrete cast-in-place pile, the outer sleeve member at least includes a portion with a circular or non-circular cross section, wherein the non-circular shape includes a triangle, a quadrangle, a polygon or a special shape.
In the construction method of the cast-in-place concrete pile, the step of applying a vertically downward acting force to the cast-in-place concrete at the first diameter expansion position by operating the diameter expansion device includes pulling up the outer sleeve component and pressing or hammering the inner sleeve component to apply a vertically downward acting force to the cast-in-place concrete.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the expanding device of the present invention comprises: and the ground breaking structure is arranged on the lower end face of the outer sleeve part, and a gap for concrete to pass through along the axial direction of the outer sleeve part is formed between the ground breaking structure and the outer sleeve part, wherein the ground breaking structure is a structure with a wide upper part and a narrow lower part. The lower end face of the outer sleeve part is provided with the ground breaking structure which is wide at the top and narrow at the bottom, so that when the outer sleeve and the inner sleeve which are mutually sleeved are adopted for forming holes, ground breaking and pipe sinking are realized more easily.
2. The ground breaking structure comprises at least one V-shaped assembly spanning the lower end face of the outer sleeve part. The adoption of the V-shaped component can greatly improve the soil breaking capacity.
3. The V-shaped assembly comprises a first V-shaped plate part and a second V-shaped plate part, and the first V-shaped plate part and the second V-shaped plate part are respectively and radially arranged on the lower end face of the outer sleeve part in a spanning mode. The V-shaped plate-shaped component can reserve a gap for the concrete to pass through axially to the maximum extent; the two V-shaped plate-shaped parts can increase the acting soil breaking area and take the soil breaking capacity into consideration.
4. The V-shaped assembly is fixedly connected with the inner wall of the outer sleeve part, and the upper end face of the V-shaped assembly is of a horizontal step structure and is axially matched with the lower end face of the outer sleeve part to bear force. By adopting the structure design, the axial downward acting force of the outer sleeve part can be better transmitted to the lower ground breaking structure.
5. The V-shaped assembly is fixedly connected with the inner wall of the outer sleeve part through an outer sleeve hoop, and the upper end face of the V-shaped assembly is of a horizontal step structure and is axially matched with the lower end face of the outer sleeve part to bear force; and the outer diameter of the inner tube head at the lower end of the inner tube component is larger than the inner diameter of the outer tube hoop. When the inner sleeve component and the outer sleeve component are completely sleeved, the lower end face of the inner tube head is attached to the upper end face of the outer tube hoop, and bottom sealing is achieved. By adopting the design, soil or slurry can be effectively prevented from entering the inner wall of the outer pipe part through the gap between the inner and outer sleeve parts when the inner and outer sleeve parts are sleeved and tamped, and further, the soil or slurry is prevented from entering the concrete when the concrete is poured, so that the quality of a pile body is prevented from being influenced.
6. The construction method of the concrete cast-in-place pile of the present invention is different from the prior art in that the first diameter expansion position where diameter expansion is first performed is not the bottom position of the cast-in-place pile, that is, the diameter expansion is preferentially performed at the upper position of the pile body, and the diameter expansion is performed in the order of the diameter expansion from top to bottom; in order to realize the expanding sequence, the invention adopts a mode that after the first expanding structure is finished, the expanding device penetrates through the first expanding structure, so that the flow-plastic concrete of the first expanding structure is kept at the first expanding position, and further, after the first expanding structure is penetrated, and when the second expanding position is radially constructed, at least the vertical position of the first expanding structure is not influenced; and further effectively avoiding the situation that the position of the radial expansion structure is easy to vertically shift relative to the designed position and the forming size cannot meet the design requirement in the process of adopting the flow-plastic concrete to carry out multi-section radial expansion structure construction on the cast-in-place pile. The construction method can effectively ensure the vertical bearing capacity and the uplift resistance of the cast-in-place pile.
7. The steel reinforcement cage is additionally arranged in the pile body, so that the uplift resistance of the pile body can be effectively improved.
8. The outer sleeve part at least comprises a part with a circular or non-circular cross section outline, wherein the non-circular shape comprises a triangle or a polygon, and can meet the design requirements of different pile body shapes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic side view of an expanding apparatus of a concrete cast-in-place pile according to an embodiment of the present invention;
fig. 2 is a bottom view of an expanding device of a concrete cast-in-place pile according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1 and 2, an embodiment of the present invention discloses an expanding device for a concrete cast-in-place pile, including: the outer sleeve part 1 and the inner sleeve part 2 are suitable for being mutually sleeved with the outer sleeve part 1; wherein, still include: and the ground breaking structure 3 is arranged on the lower end face of the outer sleeve part 1, and a gap for concrete to pass through along the axial direction of the outer sleeve part 1 exists between the ground breaking structure 3 and the outer sleeve part 1, wherein the ground breaking structure 3 is a structure with a wide upper part and a narrow lower part. In one embodiment, the ground breaking structure comprises at least one V-shaped component spanning the lower end surface of the outer sleeve part. The lower end of the inner sleeve pipe part is provided with an inner pipe head for ramming a soil body.
The V-shaped assembly comprises a first V-shaped plate part 4 and a second V-shaped plate part 5, and the first V-shaped plate part 4 and the second V-shaped plate part 5 radially span the lower end face of the outer sleeve part 1 respectively. The V-shaped assembly is characterized in that the V-shaped assembly is a first V-shaped plate part 4 and a second V-shaped plate part 5 which are fixedly connected with the inner wall of the outer sleeve part 1 respectively, and the upper end face of the V-shaped assembly is of a horizontal step structure 6 and is axially matched with the lower end face of the outer sleeve part 1 to bear force. As a preferred embodiment, an outer pipe clamp 8 is arranged on the upper end face of the V-shaped assembly, and the V-shaped assembly is mounted on the lower end face of the outer sleeve part by connecting the outer wall of the outer pipe clamp 8 with the inner wall of the outer sleeve part. The outer diameter of the inner tube head 7 at the lower end of the inner tube part is larger than the inner diameter of the outer tube hoop. When the inner sleeve component and the outer sleeve component are completely sleeved, the lower end face of the inner tube head is attached to the upper end face of the outer tube hoop, and bottom sealing is achieved.
Example 2
The invention provides a construction method of a concrete cast-in-place pile, which comprises the following steps:
a. adopting the expanding equipment of the embodiment 1 to form a hole at a pile position and sinking to a first expanding position;
b. pouring the flow plastic concrete into the first diameter expanding position, and applying a vertical downward acting force to the flow plastic concrete at the first diameter expanding position by operating the diameter expanding equipment to radially extrude and expand the flow plastic concrete to form a first diameter expanding structure;
c. applying a downward acting force to the flow plastic concrete at the first diameter expansion position by using the diameter expansion equipment, and penetrating through a flow plastic concrete body while radially extruding and expanding the flow plastic concrete;
d. sinking the expanding device downwards to a second expanding position;
e. pouring the liquid plastic concrete into the second expanding position, and applying a vertical downward acting force to the liquid plastic concrete at the second expanding position by operating the pore-forming device to radially extrude and expand the liquid plastic concrete to form a second expanding structure;
f. and e, repeating the steps c to e until the construction of the bottom expanding structure at the bottom expanding position is completed, and pouring the flow-plastic concrete to complete the pile body construction of the cast-in-place pile.
The construction method of the multi-section expanded diameter concrete cast-in-place pile of the invention, wherein, the first expanded diameter position for first expanding diameter is not the bottom position of the cast-in-place pile, namely, the difference with the prior art is that the invention preferentially expands diameter at the upper position of the pile body, and the expanding is carried out according to the order of the expanding diameters from top to bottom; in order to realize the expanding sequence, the invention adopts a mode that after the first expanding structure is finished, the expanding device penetrates through the first expanding structure, so that the flow-plastic concrete of the first expanding structure is kept at the first expanding position, and further, after the first expanding structure is penetrated, and when the second expanding position is radially constructed, at least the vertical position of the first expanding structure is not influenced; and further effectively avoiding the situation that the position of the radial expansion structure is easy to vertically shift relative to the designed position and the forming size cannot meet the design requirement in the process of adopting the flow-plastic concrete to carry out multi-section radial expansion structure construction on the cast-in-place pile. The construction method can effectively ensure the vertical bearing capacity and the uplift resistance of the cast-in-place pile.
As a further embodiment, after the step f, the method further comprises the step of inserting a reinforcement cage into the flow-molded concrete. The mode of inserting the reinforcement cage is vibration insertion.
According to different design requirements of the pile body, the shape of the cross-sectional outer contour of the pile body can comprise various shapes, such as a circle or a non-circle, wherein the non-circle comprises a triangle or a polygon, therefore, in order to meet the design requirements, the outer sleeve part at least comprises a part with the cross-sectional outer contour being a circle or a non-circle, the circle or the non-circle is not required to be formed at any cross section of the whole outer sleeve part, and preferably, the non-circle can comprise a quadrangle, a polygon or a special shape.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (6)
1. An expanding apparatus of a concrete cast-in-place pile, comprising:
an outer sleeve part, a first sleeve part and a second sleeve part,
the inner sleeve part is suitable for being sleeved with the outer sleeve part;
it is characterized by also comprising:
the soil breaking structure is arranged on the lower end face of the outer sleeve part, and a gap for concrete to pass through along the axial direction of the outer sleeve part is formed between the soil breaking structure and the outer sleeve part, wherein the soil breaking structure is wide in the upper part and narrow in the lower part;
the ground breaking structure comprises at least one V-shaped assembly which spans the lower end face of the outer sleeve part; the V-shaped assembly is fixedly connected with the inner wall of the outer sleeve part through an outer sleeve hoop, and the upper end face of the V-shaped assembly is of a horizontal step structure and is axially matched with the lower end face of the outer sleeve part to bear force; and the outer diameter of the inner tube head at the lower end of the inner tube component is larger than the inner diameter of the outer tube hoop.
2. The apparatus for expanding a concrete cast-in-place pile according to claim 1, wherein: when the inner sleeve component and the outer sleeve component are completely sleeved, the lower end face of the inner tube head is attached to the upper end face of the outer tube hoop, and bottom sealing is achieved.
3. A construction method of a concrete filling pile is characterized by comprising the following steps:
a. adopting the expanding device of claim 1 or 2 to form a hole at the pile position and sinking to the first expanding position;
b. pouring the flow plastic concrete into the first diameter expanding position, and applying a vertical downward acting force to the flow plastic concrete at the first diameter expanding position by operating the diameter expanding equipment to radially extrude and expand the flow plastic concrete to form a first diameter expanding structure;
c. applying a downward acting force to the flow plastic concrete at the first diameter expansion position by using the diameter expansion equipment, and penetrating through a flow plastic concrete body while radially extruding and expanding the flow plastic concrete;
d. sinking the expanding device downwards to a second expanding position;
e. pouring the liquid plastic concrete into the second expanding position, and applying a vertical downward acting force to the liquid plastic concrete at the second expanding position by operating the pore-forming device to radially extrude and expand the liquid plastic concrete to form a second expanding structure;
f. and e, repeating the steps c to e until the construction of the bottom expanding structure at the bottom expanding position is completed, and pouring the flow-plastic concrete to complete the pile body construction of the cast-in-place pile.
4. The method of constructing a concrete cast-in-place pile according to claim 3, wherein:
and f, inserting a reinforcement cage into the flow plastic concrete.
5. The method of constructing a cast-in-place concrete pile according to claim 4, wherein:
the outer sleeve part at least comprises a part with a circular or non-circular cross section outline, wherein the non-circular shape comprises a triangle, a quadrangle, a polygon or a special shape.
6. The method of constructing a concrete cast-in-place pile according to claim 5, wherein:
by operating the expanding device, applying a vertically downward acting force to the flow-molded concrete at the first expanding position comprises pulling up the outer sleeve component and simultaneously pressing or hammering the inner sleeve component to apply a vertically downward acting force to the flow-molded concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110487762.9A CN113622824A (en) | 2021-02-28 | 2021-02-28 | Diameter expanding equipment of concrete cast-in-place pile and construction method of concrete cast-in-place pile |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110222891.5 | 2021-02-28 | ||
| CN202110487762.9A CN113622824A (en) | 2021-02-28 | 2021-02-28 | Diameter expanding equipment of concrete cast-in-place pile and construction method of concrete cast-in-place pile |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110222891.5 Division | 2021-02-28 | 2021-02-28 |
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| CN113622824A true CN113622824A (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110487762.9A Pending CN113622824A (en) | 2021-02-28 | 2021-02-28 | Diameter expanding equipment of concrete cast-in-place pile and construction method of concrete cast-in-place pile |
| CN202110487761.4A Pending CN113279695A (en) | 2021-02-28 | 2021-02-28 | Concrete cast-in-place pile expanding equipment and construction method of concrete cast-in-place pile |
| CN202210183452.2A Pending CN114508306A (en) | 2021-02-28 | 2022-02-27 | Concrete cast-in-place pile expanding equipment and construction method of concrete cast-in-place pile |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110487761.4A Pending CN113279695A (en) | 2021-02-28 | 2021-02-28 | Concrete cast-in-place pile expanding equipment and construction method of concrete cast-in-place pile |
| CN202210183452.2A Pending CN114508306A (en) | 2021-02-28 | 2022-02-27 | Concrete cast-in-place pile expanding equipment and construction method of concrete cast-in-place pile |
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| CN (3) | CN113622824A (en) |
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2021
- 2021-02-28 CN CN202110487762.9A patent/CN113622824A/en active Pending
- 2021-02-28 CN CN202110487761.4A patent/CN113279695A/en active Pending
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- 2022-02-27 CN CN202210183452.2A patent/CN114508306A/en active Pending
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| Publication number | Publication date |
|---|---|
| CN114508306A (en) | 2022-05-17 |
| CN113279695A (en) | 2021-08-20 |
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