CN111455992A - Full-casing follow-up construction method for rotary drilling rig - Google Patents
Full-casing follow-up construction method for rotary drilling rig Download PDFInfo
- Publication number
- CN111455992A CN111455992A CN202010202088.0A CN202010202088A CN111455992A CN 111455992 A CN111455992 A CN 111455992A CN 202010202088 A CN202010202088 A CN 202010202088A CN 111455992 A CN111455992 A CN 111455992A
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- Prior art keywords
- casing
- drilling rig
- rotary drilling
- reinforcement cage
- guide pipe
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- 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
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
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- 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
- 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
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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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 invention discloses a full casing follow-up construction method of a rotary drilling rig, which comprises the following steps: paying off and positioning the pile position; drilling the pile position for 1m by using a rotary drilling rig; mounting a bottom section protective cylinder; continuously drilling the pile position for 3 m; sequentially installing a standard section protection cylinder and a bottom section protection cylinder; manufacturing, hoisting and installing a reinforcement cage, connecting a guide pipe and putting the guide pipe down into the drill hole; pouring concrete; and pulling out the standard section protection cylinder and the bottom section protection cylinder. The method has the advantages that the connection and the disassembly of the pile casing are rapid and convenient, the concrete does not block the pipe, the reinforcement cage is not easy to deform in the pile casing pulling-out process, and the reinforcement cage is prevented from floating upwards in the concrete pouring process.
Description
Technical Field
The invention relates to the technical field of pile foundation construction, in particular to a full casing follow-up construction method of a rotary drilling rig.
Background
For local weak strata such as sandy soil layers, hole collapse is easily formed in the hole forming process of the rotary drilling rig, the diameter of a pile foundation pile is increased, uneven concave-convex surfaces are formed after the main structure is excavated, concrete raw materials are wasted, and construction quality is further influenced. The traditional rotary drilling rig generally adopts slurry wall protection in the construction process of hole forming wall protection, the formation of slurry easily causes secondary pollution to the environment, and simultaneously, pile bottom sediment and mud skin are formed at the periphery of a pile.
For example, the invention patent application with the Chinese application number of 201810108050.X relates to a rotary drilling full casing following rock face drilling construction method, the pile foundation construction method is that a full casing following rock face drilling method is adopted in the construction process, soil is drilled while a casing is lowered, when the casing is close to the rock face, the bottom of the casing is treated by cement, gravel and water glass in a throwing and filling manner and is extruded, a karst cave encountered in the drilling process is also treated by a throwing and filling extrusion measure, and finally the pile forming process of the reinforced concrete cast-in-place pile is completed.
For another example, the invention patent with chinese application No. 201710661866.0 discloses a method for constructing a full casing follow-up method for a bridge pile foundation, comprising: (1) and (3) designing and manufacturing a protective cylinder: a plurality of protective cylinders are adopted, and the protective cylinders can be mutually detached; (2) installing a first section of protective cylinder: connecting the first section of casing with a drill bit of the drilling machine; (3) pile-forming by casing follow-up drilling; (4) pouring concrete into the pile foundation and pulling out the pile casing.
The problems existing in the prior art are as follows: the connection and the disassembly of the pile casing are not simple and quick enough, and the construction efficiency is influenced; in the processes of hoisting and mounting the reinforcement cage and pulling out the protective cylinder, the reinforcement cage is easy to deform, and the quality of a pile body is influenced; the influence of groundwater on the buoyancy of the reinforcement cage is not considered.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a full casing follow-up construction method of a rotary drilling rig, which can solve the problem of serious hole collapse in the range of a weak layer.
The full casing follow-up construction method of the rotary drilling rig comprises the following steps:
step 1: paying off and positioning the pile position;
step 2: drilling the pile position by using a rotary drilling rig to a depth of 1 m;
and step 3: lifting a drill rod, connecting the drill rod with a casing protecting connector, connecting the casing protecting connector with a bottom section casing, rotating and pressing the bottom section casing to a drilling depth through the drill rod, and checking the verticality of the bottom section casing by using a level gauge when the lower end of the bottom section casing enters the drilling depth of 0.5 m;
and 4, step 4: continuously drilling the pile position for 3m by using the rotary drilling rig;
and 5: connecting the casing connector with a standard casing, connecting the standard casing with the bottom casing, rotating and pressing the bottom casing to a drilling depth through the drill rod, and checking the verticality of the bottom casing by using a level gauge when the lower end of the bottom casing enters the drilling depth of 1.5 m;
step 6: repeating the step 4 and the step 5 until the designed depth of the drill hole is reached;
and 7: manufacturing, hoisting and installing a reinforcement cage, connecting a guide pipe and putting the guide pipe down into a drill hole;
and 8: pouring concrete into the drill hole;
and step 9: and after the concrete pouring is finished, pulling out the standard section protecting cylinder and the bottom section protecting cylinder.
Furthermore, the upper end of the drill rod is connected with a power head of a rotary drilling rig, a first pin hole is formed in the lower end of the drill rod, a casing driver is arranged at the upper end of the casing connector, a second pin hole is formed in the upper end of the casing driver, and the drill rod is connected with the casing connector through the first pin hole and the second pin hole.
Further, protect a section of thick bamboo connector lower extreme and be provided with the first connecting pin hole that annular equidistance distributes be provided with first locating pin hole between the first connecting pin hole, the end festival protects a section of thick bamboo upper end and is provided with the second connecting pin hole that annular equidistance distributes be provided with first locating pin between the second connecting pin hole, protect a section of thick bamboo connector with the end festival protects a section of thick bamboo and passes through first connecting pin hole, second connecting pin hole and first locating pin hole, first locating pin are connected.
Furthermore, the standard protective cylinders used in the method adopt a connection mode of mutually embedded interfaces and combined screw locking.
Further, the standard joint casing used in the method has a length of 3m, an outer diameter of 1.0 m and a wall thickness of 20 mm.
And 7, manufacturing, hoisting and installing a reinforcement cage, and checking whether the reinforcement cage is positioned in the center of the drilled hole or not after the reinforcement cage enters the drilled hole.
And 7, when the guide pipe is connected, a 5m straight pipe is connected to a taper pipe at the outlet of the concrete pump, a separation sieve is arranged at the tail end of the straight pipe, then the straight pipe is connected with an elbow pipe, the guide pipe is moved down along the center of the drill hole when the guide pipe is moved down, and after the guide pipe is moved down, an excitation device is arranged at the top of the guide pipe.
Further, in step 7, the vibration excitation device is an attached vibrator.
Further, step 7 installation steel reinforcement cage is put in preparation, hoist, steel reinforcement cage includes main muscle, stirrup and the stirrup of putting more energy into, the vertical range of encircleing of main muscle is in the stirrup with the inside of the stirrup of putting more energy into, main muscle with the stirrup fixed connection of putting more energy into, still be provided with the reinforcing bar earrings on the stirrup of putting more energy into reinforcing steel cage bottom 500mm department sets up prevents floating the steel sheet, prevent floating the steel sheet and pass through prevent floating the muscle with steel reinforcement cage connects.
The following construction method for the full casing of the rotary drilling rig has the beneficial effects that:
1. by adopting the full-protection-cylinder follow-up construction method of the rotary drilling rig, the standard section protection cylinders are mutually embedded and locked by combining screws, and the protection cylinders are quickly and conveniently connected and detached.
2. By adopting the full casing follow-up construction method of the rotary drilling rig, the guide pipe is arranged along the center of the drill hole, the steel reinforcement cage can be prevented from being hooked, the end of the straight pipe is provided with the separation sieve and then connected with the bent pipe, and the top of the guide pipe is provided with the vibration excitation device, so that the concrete can be effectively prevented from blocking the pipe, and the pile body can be prevented from being broken.
3. By adopting the construction method for the full casing follow-up of the rotary drilling rig, the steel reinforcement cage is provided with the anti-floating ribs and the stiffening stirrups, so that the steel reinforcement cage is not easy to deform in the casing removing process, and the steel reinforcement cage is prevented from floating in the concrete pouring process.
Drawings
FIG. 1 is a schematic diagram of the construction of a drill bit and a sheath connector according to the present invention;
FIG. 2 is a schematic structural view of a standard joint casing according to the present invention;
FIG. 3 is a schematic structural view of the bottom casing according to the present invention;
FIG. 4 is a schematic structural view of the reinforcement cage of the present invention;
fig. 5 is a schematic structural view of the anti-floating steel plate and the anti-floating ribs.
Shown in the figure: 1-a drill rod; 11-a first pin hole; 2-a cartridge-guard connector; 21-a casing drive; 22-a second pin hole; 23-a first connection pin hole; 24-a first dowel hole; 3-bottom section protection cylinder; 31-a second connecting pin hole; 32-a first locator pin; 33-a cutting tooth; 4-standard knot protective cylinder; 41-screw; 5-a reinforcement cage; 51-main reinforcement; 52-stirrup; 53-stiffening stirrup; 54-steel bar earrings; 55-anti-floating ribs; 56-anti-floating steel plate.
Detailed Description
A full casing follow-up construction method of a rotary drilling rig is characterized by comprising the following steps:
step 1: paying off and positioning the pile position;
step 2: drilling the pile position by a rotary drilling rig for 1m depth;
and step 3: the drill rod 1 is lifted and then connected with the cylinder protecting connector 2, the cylinder protecting connector 2 is connected with the bottom section of the cylinder protecting 3, the bottom section of the cylinder protecting 3 is rotated and pressed down to the drilling depth through the drill rod 1, and when the lower end of the bottom section of the cylinder protecting 3 enters the drilling depth of 0.5m, a level gauge is used for checking the verticality of the bottom section of the cylinder protecting 3;
and 4, step 4: continuously drilling the pile position for 3m by using a rotary drilling rig;
and 5: connecting a protective cylinder connector 2 with a standard section protective cylinder 4, connecting the standard section protective cylinder 4 with a bottom section protective cylinder 3, rotating and pressing the bottom section protective cylinder 3 to the drilling depth through a drill rod 1, and checking the verticality of the bottom section protective cylinder 3 by using a level gauge when the lower end of the bottom section protective cylinder 3 enters the drilling depth of 1.5 m;
step 6: repeating the step 4 and the step 5 until the designed depth of the drill hole is reached;
and 7: manufacturing, hoisting and installing a reinforcement cage 5, connecting a guide pipe and putting the guide pipe down into the drill hole;
and 8: pouring concrete into the drill hole;
and step 9: and after the concrete pouring is finished, the standard section protecting cylinder 4 and the bottom section protecting cylinder 3 are pulled out.
Further, as shown in fig. 1, the upper end of the drill rod 1 is connected with a rotary drilling rig power head (not shown), the lower end of the drill rod is provided with a first pin hole 11, the upper end of the casing protecting connector 2 is provided with a casing protecting driver 21, the upper end of the casing protecting driver is provided with a second pin hole 22, and the drill rod 1 is connected with the casing protecting connector 2 through the first pin hole 11 and the second pin hole 22.
Further, as shown in fig. 1 and 3, the lower end of the casing connector 2 is provided with first connecting pin holes 23 distributed annularly and equidistantly, first positioning pin holes 24 are arranged between the first connecting pin holes 23, the upper end of the bottom casing 3 is provided with second connecting pin holes 31 distributed annularly and equidistantly, first positioning pins 32 are arranged between the second connecting pin holes 31, the lower end of the bottom casing 3 is provided with cutting teeth 33, and the lower end of the casing connector 2 is connected with the upper end of the bottom casing 3 through the first connecting pin holes 23, the second connecting pin holes 31, the first positioning pin holes 24 and the first positioning pins 32.
Further, as shown in fig. 2, in the process of repeating step 5, a connection mode that the standard casing nuts 4 are mutually inserted and locked by combining screws 41 is adopted.
Further, each standard knot casing 4 has a length of 3m, an outer diameter of 1.0 m and a wall thickness of 20 mm.
Further, in the process of manufacturing, hoisting and installing the reinforcement cage 5, after the reinforcement cage 5 enters the drilled hole, the reinforcement cage 5 is checked to be positioned in the center of the drilled hole.
Furthermore, when the guide pipe is connected, a 5m straight pipe is connected to a taper pipe at the outlet of the concrete pump, a separating screen is arranged at the tail end of the straight pipe and used for preventing large block masses in concrete from blocking the guide pipe to prevent the large block masses in the concrete from blocking the guide pipe to cause the pile body to be broken, then a bent pipe is connected, when the guide pipe is placed down, the guide pipe is placed down along the center of a drill hole to avoid hanging the reinforcement cage 3, after the guide pipe is placed down, an attached vibrator is arranged at the top of the guide pipe, the attached vibrator is opened to prevent the guide pipe from being blocked when the guide pipe is placed, and when the concrete is poured, the guide pipe is 0.3-0.5m away from the bottom of the drill.
Further, as shown in fig. 4 and 5, the steel reinforcement cage 5 includes a main reinforcement 51, a stirrup 52 and a stiffening stirrup 53, the main reinforcement 51 is vertically arranged around the inside of the stirrup 52 and the stiffening stirrup 53, the main reinforcement 51 is fixedly connected with the stirrup 52 and the stiffening stirrup 53, and the stiffening stirrup 53 is further provided with a steel reinforcement ear ring 54, so that the steel reinforcement cage 5 can be conveniently hoisted, and the effect of a protection surface can also be achieved. Set up in 5 bottom 500mm departments of steel reinforcement cage and prevent floating steel sheet 56, prevent floating steel sheet 56 and be connected with steel reinforcement cage 5 through preventing floating muscle 55.
The present invention is not limited to the above-described embodiments, and any variations, modifications, and alterations that may occur to one skilled in the art without departing from the spirit of the invention are intended to be within the scope of the invention.
Claims (8)
1. A full casing follow-up construction method of a rotary drilling rig is characterized by comprising the following steps:
step 1: paying off and positioning the pile position;
step 2: drilling the pile position by using a rotary drilling rig to a depth of 1 m;
and step 3: connecting a drill rod with a casing connector, connecting the casing connector with a bottom section casing, rotating and pressing the bottom section casing to a drilling depth through the drill rod, and checking the verticality of the bottom section casing by using a level gauge when the lower end of the bottom section casing enters the drilling depth of 0.5 m;
and 4, step 4: continuously drilling the pile position by the rotary drilling rig for 3 m;
and 5: connecting the casing connector with a standard casing, connecting the standard casing with the bottom casing, rotating and pressing the bottom casing to a drilling depth through the drill rod, and checking the verticality of the bottom casing by using a level gauge when the lower end of the bottom casing enters the drilling depth of 1.5 m;
step 6: repeating the step 4 and the step 5 until the designed depth of the drill hole is reached;
and 7: manufacturing, hoisting and installing a reinforcement cage, connecting a guide pipe and putting the guide pipe down into a drill hole;
and 8: pouring concrete into the drill hole;
and step 9: and after the concrete pouring is finished, pulling out the standard section protecting cylinder and the bottom section protecting cylinder.
2. The full casing follow-up construction method of the rotary drilling rig according to claim 1, wherein a power head of the rotary drilling rig is connected to the upper end of the drill rod, a first pin hole is formed in the lower end of the drill rod, a casing driver is arranged at the upper end of the casing connector, a second pin hole is formed in the upper end of the casing driver, and the drill rod is connected with the casing connector through the first pin hole and the second pin hole.
3. The full casing follow-up construction method of the rotary drilling rig according to claim 1, wherein first connecting pin holes are formed in the lower end of the casing connector in an annular and equidistant manner, first positioning pin holes are formed between the first connecting pin holes, second connecting pin holes are formed in the upper end of the bottom casing in an annular and equidistant manner, first positioning pins are arranged between the second connecting pin holes, and the casing connector and the bottom casing are connected through the first connecting pin holes, the second connecting pin holes, the first positioning pin holes and the first positioning pins.
4. The full casing follow-up construction method of the rotary drilling rig according to claim 1, wherein standard section casings used in the method are connected in a manner of mutually embedded interfaces and locking by combining screws.
5. The standard knot casing for the full casing follow-up construction method of the rotary drilling rig according to claim 1, wherein the length of the standard knot casing is 3 meters, the outer diameter of the standard knot casing is 1.0 meter, and the wall thickness of the standard knot casing is 20 millimeters.
6. The full casing follow-up construction method of the rotary drilling rig according to claim 1, wherein a reinforcement cage is manufactured, hoisted and installed in the step 7, and the reinforcement cage is checked to be located in the center of the drill hole after entering the drill hole.
7. The method for constructing the follow-up of the full casing of the rotary drilling rig according to claim 1, wherein in the step 7, when the guide pipe is connected, a straight pipe of 5m is connected to a taper pipe at the outlet of a concrete pump, a separation sieve is arranged at the tail end of the straight pipe, then the straight pipe is connected to a bent pipe, when the guide pipe is lowered, the guide pipe is lowered along the center of the drill hole, and after the guide pipe is lowered, an attached vibrator is installed at the top of the guide pipe.
8. The rotary drilling rig full casing follow-up construction method according to claim 1, wherein in the step 7, a reinforcement cage is manufactured, hoisted and installed, the reinforcement cage comprises a main reinforcement, stirrups and stiffening stirrups, the main reinforcement is vertically arranged inside the stirrups and the stiffening stirrups in a surrounding mode, the main reinforcement is fixedly connected with the stirrups, the main reinforcement is fixedly connected with the stiffening stirrups, reinforcing lug rings are further arranged on the stiffening stirrups, an anti-floating steel plate is arranged at a position 500mm away from the bottom of the reinforcement cage, and the anti-floating steel plate is connected with the reinforcement cage through the anti-floating reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202088.0A CN111455992A (en) | 2020-03-20 | 2020-03-20 | Full-casing follow-up construction method for rotary drilling rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202088.0A CN111455992A (en) | 2020-03-20 | 2020-03-20 | Full-casing follow-up construction method for rotary drilling rig |
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| CN111455992A true CN111455992A (en) | 2020-07-28 |
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| CN202010202088.0A Pending CN111455992A (en) | 2020-03-20 | 2020-03-20 | Full-casing follow-up construction method for rotary drilling rig |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114525778A (en) * | 2021-12-20 | 2022-05-24 | 中铁二局第四工程有限公司 | Karst area karst cave pile foundation pile forming method |
| CN114525778B (en) * | 2021-12-20 | 2024-06-04 | 中铁二局第四工程有限公司 | Karst area karst cave pile foundation piling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20200728 |