CN114875899B - Hard stratum pore-forming pile-forming construction process - Google Patents
Hard stratum pore-forming pile-forming construction process Download PDFInfo
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- CN114875899B CN114875899B CN202210656566.4A CN202210656566A CN114875899B CN 114875899 B CN114875899 B CN 114875899B CN 202210656566 A CN202210656566 A CN 202210656566A CN 114875899 B CN114875899 B CN 114875899B
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- mounting hole
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- reinforcement cage
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 230000002787 reinforcement Effects 0.000 claims abstract description 56
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000004080 punching Methods 0.000 description 8
- 125000006850 spacer group Chemical group 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The application relates to a hard stratum pore-forming pile forming construction process, which relates to the technical field of foundation construction and comprises the following steps: drilling a first mounting hole: drilling a first mounting hole on the stratum surface of the pile foundation mounting position; drilling a second mounting hole: drilling a second mounting hole on the bottom surface of the first mounting hole, wherein the aperture of the second mounting hole is smaller than that of the first mounting hole; drilling a third mounting hole: drilling a third mounting hole on the bottom surface of the second mounting hole, wherein the aperture of the third mounting hole is smaller than that of the second mounting hole; installing a steel pile casing: vertically inserting the bottom end of the steel casing into the first mounting hole; installing a first reinforcement cage: the first reinforcement cage is coaxially arranged in the third mounting hole; installing a second reinforcing steel bar: the second reinforcement cage is coaxially arranged in the second mounting hole; installing a third reinforcement cage: the bottom end of the third reinforcement cage is coaxially arranged in the first mounting hole; pouring concrete: and pouring concrete into the steel casing. The application can improve the construction efficiency of the pile foundation.
Description
Technical Field
The application relates to the technical field of foundation construction, in particular to a hard stratum pore-forming pile-forming construction process.
Background
At present, the bottom of the bridge, the house and other buildings is provided with pile foundation supporting structures for supporting and protecting the bridge and the house, so that the construction of the bridge and the house is more stable and safer.
When the pile foundation is built, firstly, punching is carried out at the pile foundation installation position, after punching is completed, construction equipment such as a crane is started, the bottom end of the steel pile casing is vertically inserted into the hole, then, the steel reinforcement cage is vertically placed into the steel pile casing by using the crane, and after the installation of the steel reinforcement cage is completed, concrete pouring is carried out on the steel reinforcement cage in the steel pile casing.
Above-mentioned pile foundation is constructed the in-process, when punching to pile foundation mounted position, because the position of punching is in hard stratum, along with the gradual increase of depth of punching, the degree of difficulty of punching also increases thereupon, and traditional mode of punching is higher to the requirement of drill bit, and the time of punching is longer, leads to the building inefficiency of pile foundation.
Disclosure of Invention
In order to improve the construction efficiency of pile foundations, the application provides a hard stratum pore-forming pile-forming construction process.
The application provides a hard stratum pore-forming pile-forming construction process, which adopts the following technical scheme:
A hard stratum pore-forming pile forming construction process comprises the following steps:
Drilling a first mounting hole: drilling a first mounting hole on the stratum surface of the pile foundation mounting position, wherein the diameter of the first mounting hole is larger than the diameter of a pile;
drilling a second mounting hole: drilling a second mounting hole on the bottom surface of the first mounting hole, wherein the aperture of the second mounting hole is smaller than that of the first mounting hole;
drilling a third mounting hole: drilling a third mounting hole on the bottom surface of the second mounting hole, wherein the aperture of the third mounting hole is smaller than that of the second mounting hole;
Installing a steel pile casing: vertically inserting the bottom end of the steel protective cylinder into the first mounting hole, wherein the outer diameter of the bottom end of the steel protective cylinder is the same as the inner diameter of the first mounting hole;
Installing a first reinforcement cage: the first reinforcement cage is coaxially arranged in the third mounting hole, and the length of the first reinforcement cage is the same as the depth of the third mounting hole;
Installing a second reinforcing steel bar: the second reinforcement cage is coaxially arranged in the second mounting hole, the length of the second reinforcement cage is the same as the depth of the second mounting hole, and the second reinforcement cage is fixedly connected with the first reinforcement cage;
Installing a third reinforcement cage: the bottom end of the third reinforcement cage is coaxially arranged in the first mounting hole, and the third reinforcement cage is fixedly connected with the second reinforcement cage;
pouring concrete: and pouring concrete into the steel casing.
By adopting the technical scheme, when the second mounting hole is drilled, drilling pressure is generated from the bottom surface of the first mounting hole, and the pressure is gradually increased from zero; when the third mounting hole is drilled, drilling pressure is generated from the bottom surface of the second mounting hole, and the pressure is gradually increased from zero; in the traditional drilling process, the drilling pressure of the second mounting hole and the drilling pressure of the third mounting hole are gradually increased from a certain value, so that the drilling difficulty is reduced, the construction efficiency of the pile foundation is improved, and meanwhile, the contact area between the steel pile casing and the stratum can be increased by the first mounting hole, so that the stability of the pile foundation is improved.
Optionally, the bottom end of the steel casing is in a necking shape from bottom to top.
Through adopting above-mentioned technical scheme, when steel pile casing bottom and stratum area of contact increase, can make steel pile casing need bigger diameter, the concrete quantity that needs pour in to steel pile casing this moment increases, leads to the efficiency of building of pile foundation to reduce, and when steel pile casing bottom was the throat form setting from bottom to top, can reduce the volume of steel pile casing, and then reduce the quantity of pouring concrete to further improved the efficiency of pile foundation construction.
Optionally, a first fixing groove is formed in the side wall of the third mounting hole.
By adopting the technical scheme, when the concrete is poured, the concrete flows into the first fixed groove, so that the contact area between the pile foundation and the stratum is increased, and the stability of the pile foundation is further improved; and when the pulling force of pile foundation in vertical direction is strengthened, need make the concrete in the first fixed slot and the concrete in the third mounting hole take place the separation completely, just can destroy the structure of pile foundation to the tensile ability of pile foundation in vertical direction has been increased.
Optionally, a second fixing groove is formed in the side wall of the second mounting hole, and the cross section area of the second fixing groove is larger than that of the first fixing groove.
Through adopting above-mentioned technical scheme, during concrete placement, the concrete flows and gets into in the second fixed slot for pile foundation and stratum's area of contact increase, and the cross sectional area of second fixed slot is greater than the cross sectional area of first fixed slot, thereby further improved pile foundation's stability, and when pile foundation in the ascending pulling force reinforcing of vertical direction, need make the concrete in the first fixed slot take place the separation completely with the concrete in the third mounting hole, the concrete in the second fixed slot takes place the separation completely with the concrete in the second mounting hole, just can destroy the structure of pile foundation, thereby further increased pile foundation's tensile capacity in the vertical direction.
Optionally, a first communication hole is formed in one side, close to the first fixing groove, of the second fixing groove, and the first communication hole is communicated with the first fixing groove and the second fixing groove.
By adopting the technical scheme, when concrete pouring is carried out, concrete can enter the first fixing groove and the second fixing groove through the first communication holes; when the first fixing groove is filled with concrete, concrete is continuously poured into the steel casing, at the moment, the concrete in the first fixing groove can overflow into the second fixing groove through the first communication hole, so that the concrete pouring speed in the second fixing groove is increased, after the second fixing groove is filled with concrete, the concrete above the second fixing groove can downwards extrude the concrete in the first fixing groove, so that the concrete in the first fixing groove can extrude the concrete in the second fixing groove through the first communication hole, and further, the concrete pouring in the second fixing groove is more compact; when the second fixed slot is filled with concrete, the concrete above the second fixed slot can play an extrusion role on the concrete in the second fixed slot, and the concrete in the second fixed slot extrudes the concrete in the first fixed slot through the first communication hole at the moment, so that the concrete in the first fixed slot is poured more tightly, and meanwhile, the contact area between the pile foundation and the stratum is increased through the first communication hole, and the stability of the pile foundation is further improved.
Optionally, a second communication hole is formed in the bottom surface of the first mounting hole, and the second communication hole is communicated with the first fixing groove and the second fixing groove.
Through adopting the technical scheme, when the actual construction space of the first fixing groove and the second fixing groove is smaller, the second communication hole is formed in the bottom surface of the first mounting hole, the poured concrete can enter the first fixing groove and the second fixing groove through the second communication hole, when the first fixing groove is filled with concrete, the concrete is continuously poured into the steel casing, at the moment, the concrete in the first fixing groove can overflow into the second fixing groove through the second communication hole, so that the concrete pouring speed in the second fixing groove is increased, after the second fixing groove is filled with concrete, the concrete above the second fixing groove can downwards squeeze the concrete in the first fixing groove, so that the concrete in the first fixing groove is extruded through the second communication hole, and further, the concrete pouring in the second fixing groove is tighter; when the second fixing groove is filled with concrete, the concrete above the second fixing groove can extrude the concrete in the second fixing groove, and at the moment, the concrete in the second fixing groove extrudes the concrete in the first fixing groove through the second communication hole, so that the concrete in the first fixing groove is poured more tightly, and meanwhile, the contact area between the pile foundation and the stratum is increased by the second communication hole, and the stability of the pile foundation is improved; and the concrete above the second communication hole can directly produce extrusion effect to the concrete in the second communication hole for the concrete in the second communication hole, the concrete in the first fixed slot and the concrete in the second fixed slot are poured more closely, thereby further improving the stability of pile foundation.
Optionally, one side of the second fixing groove close to the first mounting hole is inclined downward along a direction away from the second mounting hole, and one side of the first fixing groove close to the second mounting hole is inclined downward along a direction away from the third mounting hole.
Through adopting above-mentioned technical scheme for the concrete in first fixed slot or the second fixed slot can rely on self gravity to flow towards the direction that is close to self tank bottom, avoids the concrete to pile up in first fixed slot or second fixed slot notch department, and then makes the concrete placement in first fixed slot and the second fixed slot inseparabler, thereby has further improved the stability of pile foundation.
Optionally, the locating hole has been seted up to third mounting hole bottom, and first steel reinforcement cage bottom is vertical to be provided with the locating steel bar, and the length of locating steel bar is the same with the length of locating hole, and the diameter of locating steel bar is the same with the diameter of locating hole, and the locating steel bar inserts and establishes in the locating hole.
Through adopting above-mentioned technical scheme, insert the locating reinforcement and establish in the locating hole, avoid first steel reinforcement cage, second steel reinforcement cage and third steel reinforcement cage to produce and rock, be favorable to the solidification of concrete to further promoted the efficiency of pile foundation construction.
In summary, the present application includes at least one of the following beneficial technical effects:
1. The aperture of the second mounting hole is smaller than that of the first mounting hole, and the aperture of the third mounting hole is smaller than that of the second mounting hole, so that the drilling difficulty is reduced, the construction efficiency of the pile foundation is improved, and meanwhile, the contact area between the steel pile casing and the stratum can be increased by the first mounting hole, and the stability of the pile foundation is improved;
2. when the bottom end of the steel pile casing is in a necking shape from bottom to top, the contact area between the bottom end of the steel pile casing and a stratum is increased, and meanwhile, the volume of the steel pile casing can be reduced, so that the quantity of poured concrete is reduced, and the pile foundation construction efficiency is further improved;
3. Through seting up first communication hole for concrete in the second fixed slot is inseparabler with the concrete placement in the first fixed slot, and first communication hole has increased the area of contact of pile foundation and stratum simultaneously, thereby has further improved the stability of pile foundation.
Drawings
FIG. 1 is a cross-sectional view of a construction of an embodiment of the present application;
Fig. 2 is a structural sectional view for showing a second communication hole according to an embodiment of the present application.
Reference numerals illustrate: 1. a first mounting hole; 11. a second communication hole; 2. a second mounting hole; 21. a second fixing groove; 211. a first communication hole; 3. a third mounting hole; 31. a first fixing groove; 32. positioning holes; 4. a steel pile casing; 5. a first reinforcement cage; 6. a second reinforcement cage; 7. a third reinforcement cage; 8. and positioning the steel bar.
Detailed Description
The application is described in further detail below with reference to fig. 1-2.
The embodiment of the application discloses a construction process for forming holes in a hard stratum and piling.
Referring to fig. 1 and 2, a hard formation pore-forming pile-forming construction process includes the steps of:
Drilling a first mounting hole 1:
and vertically drilling a first mounting hole 1 on the stratum surface of the pile foundation mounting position.
Drilling a second mounting hole 2:
And a second mounting hole 2 is drilled on the bottom surface of the first mounting hole 1, the aperture of the second mounting hole 2 is smaller than that of the first mounting hole 1, and the second mounting hole 2 and the first mounting hole 1 are coaxially arranged.
Drilling a third mounting hole 3:
and a third mounting hole 3 is drilled on the bottom surface of the second mounting hole 2, the aperture of the third mounting hole 3 is smaller than that of the second mounting hole 2, and the third mounting hole 3 and the second mounting hole 2 are coaxially arranged.
First fixing groove 31 is formed:
The first fixing groove 31 is formed in the side wall of the third mounting hole 3, the first fixing groove 31 is arranged along the circumferential direction of the third mounting hole 3 and is arranged coaxially with the third mounting hole 3, the first fixing groove 31 is located at the bottom of the third mounting hole 3, and one side, close to the second mounting hole 2, of the first fixing groove 31 is inclined downwards along the direction away from the third mounting hole 3.
A second fixing groove 21 is formed:
The second fixing groove 21 is formed in the side wall of the second mounting hole 2, the second fixing groove 21 is circumferentially arranged along the second mounting hole 2 and is coaxially arranged with the second mounting hole 2, the cross section area of the second fixing groove 21 is larger than that of the first fixing groove 31, and one side, close to the first mounting hole 1, of the second fixing groove 21 is obliquely downwards in a direction away from the second mounting hole 2.
First communication hole 211 is formed:
A first communication hole 211 is vertically formed in one side, close to the first fixing groove 31, of the second fixing groove 21, and a plurality of first communication holes 211 are formed in the first communication hole 211 along the circumferential direction of the second mounting hole 2, and the first communication holes 211 are communicated with the first fixing groove 31 and the second fixing groove 21.
A second communication hole 11 is formed:
When the actual construction space of the first fixing groove 31 and the second fixing groove 21 is smaller, the second communication holes 11 are formed in the bottom surface of the first mounting hole 1, the second communication holes 11 are circumferentially arranged along the second mounting hole 2, and the second communication holes 11 are communicated with the first fixing groove 31 and the second fixing groove 21.
Positioning holes 32 are formed:
The bottom surface of the third mounting hole 3 is provided with a positioning hole 32, and the positioning hole 32 is provided with a plurality of positioning holes along the circumferential direction of the third mounting hole 3.
Installing a steel casing 4:
The bottom end of the steel protection cylinder 4 is vertically inserted in the first mounting hole 1, the bottom of the steel protection cylinder 4 is in a necking structure from bottom to top, and the maximum outer diameter of the bottom end of the steel protection cylinder 4 is the same as the inner diameter of the first mounting hole 1.
Installing a first reinforcement cage 5:
The first reinforcement cage 5 is coaxially arranged in the third mounting hole 3, the outer diameter of the first reinforcement cage 5 is the same as the inner diameter of the third mounting hole 3, and the length of the first reinforcement cage 5 is the same as the depth of the third mounting hole 3; the vertical spacer bar 8 that is provided with in first steel reinforcement cage 5 below, spacer bar 8 are provided with a plurality of along first steel reinforcement cage 5 circumference, and with locating hole 32 one-to-one, the diameter of spacer bar 8 is the same with the diameter of locating hole 32, spacer bar 8 and first steel reinforcement cage 5 fixed connection, when the installation of first steel reinforcement cage 5, insert spacer bar 8 and establish in corresponding locating hole 32.
Installing a second reinforcing steel bar:
The second steel reinforcement cage 6 is coaxially arranged in the second mounting hole 2, the length of the second steel reinforcement cage 6 is the same as the depth of the second mounting hole 2, and the second steel reinforcement cage 6 is fixedly connected with the first steel reinforcement cage 5.
And (3) installing a third reinforcement cage 7:
The coaxial setting in first mounting hole 1 of third steel reinforcement cage 7 bottom, the internal diameter of the external diameter first mounting hole 1 of third steel reinforcement cage 7 is the same, and third steel reinforcement cage 7 and second steel reinforcement cage 6 fixed connection.
Pouring concrete: concrete is poured into the steel casing 4.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (4)
1. The construction process for forming the hole in the hard stratum is characterized by comprising the following steps of:
drilling a first mounting hole (1): drilling a first mounting hole (1) on the stratum surface of the pile foundation mounting position;
Drilling a second mounting hole (2): drilling a second mounting hole (2) on the bottom surface of the first mounting hole (1), wherein the aperture of the second mounting hole (2) is smaller than that of the first mounting hole (1);
Drilling a third mounting hole (3): drilling a third mounting hole (3) on the bottom surface of the second mounting hole (2), wherein the aperture of the third mounting hole (3) is smaller than that of the second mounting hole (2);
Installing a steel casing (4): the bottom end of the steel pile casing (4) is vertically inserted into the first mounting hole (1), and the outer diameter of the bottom end of the steel pile casing (4) is the same as the inner diameter of the first mounting hole (1);
Installing a first reinforcement cage (5): the first reinforcement cage (5) is coaxially arranged in the third mounting hole (3), and the length of the first reinforcement cage (5) is the same as the depth of the third mounting hole (3);
installing a second reinforcing steel bar: the second reinforcement cage (6) is coaxially arranged in the second mounting hole (2), the length of the second reinforcement cage (6) is the same as the depth of the second mounting hole (2), and the second reinforcement cage (6) is fixedly connected with the first reinforcement cage (5);
Installing a third reinforcement cage (7): the bottom end of the third reinforcement cage (7) is coaxially arranged in the first mounting hole (1), and the third reinforcement cage (7) is fixedly connected with the second reinforcement cage (6);
pouring concrete: pouring concrete into the steel pile casing (4);
a first fixing groove (31) is formed in the side wall of the third mounting hole (3);
A second fixing groove (21) is formed in the side wall of the second mounting hole (2), and the cross section area of the second fixing groove (21) is larger than that of the first fixing groove (31);
A first communication hole (211) is formed in one side, close to the first fixing groove (31), of the second fixing groove (21), and the first communication hole (211) is communicated with the first fixing groove (31) and the second fixing groove (21);
The bottom surface of the first mounting hole (1) is provided with a second communication hole (11), and the second communication hole (11) is communicated with the first fixing groove (31) and the second fixing groove (21).
2. The hard formation pore-forming pile forming construction process according to claim 1, wherein: the bottom end of the steel protective cylinder (4) is in a necking shape from bottom to top.
3. The hard formation pore-forming pile forming construction process according to claim 1, wherein: one side of the second fixing groove (21) close to the first mounting hole (1) is inclined downwards along the direction away from the second mounting hole (2), and one side of the first fixing groove (31) close to the second mounting hole (2) is inclined downwards along the direction away from the third mounting hole (3).
4. The hard formation pore-forming pile forming construction process according to claim 1, wherein: positioning holes (32) are formed in the bottom surface of the third mounting hole (3), positioning steel bars (8) are vertically arranged at the bottom of the first steel reinforcement cage (5), the length of each positioning steel bar (8) is identical to that of each positioning hole (32), the diameter of each positioning steel bar (8) is identical to that of each positioning hole (32), and each positioning steel bar (8) is inserted into each positioning hole (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210656566.4A CN114875899B (en) | 2022-06-11 | 2022-06-11 | Hard stratum pore-forming pile-forming construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210656566.4A CN114875899B (en) | 2022-06-11 | 2022-06-11 | Hard stratum pore-forming pile-forming construction process |
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| Publication Number | Publication Date |
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| CN114875899A CN114875899A (en) | 2022-08-09 |
| CN114875899B true CN114875899B (en) | 2024-05-31 |
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| CN202210656566.4A Active CN114875899B (en) | 2022-06-11 | 2022-06-11 | Hard stratum pore-forming pile-forming construction process |
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| JP6539566B2 (en) * | 2015-10-29 | 2019-07-03 | 大亜ソイル株式会社 | Construction method of cast-in-place concrete pile |
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|---|---|---|---|---|
| CN205917727U (en) * | 2016-06-16 | 2017-02-01 | 江苏海上龙源风力发电有限公司 | Marine fan of implanted inlays rock single pile basis |
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| CN114875899A (en) | 2022-08-09 |
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