CN115726692A - Method for forming hole in inclined rock surface by rotary drilling - Google Patents
Method for forming hole in inclined rock surface by rotary drilling Download PDFInfo
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- CN115726692A CN115726692A CN202211449758.4A CN202211449758A CN115726692A CN 115726692 A CN115726692 A CN 115726692A CN 202211449758 A CN202211449758 A CN 202211449758A CN 115726692 A CN115726692 A CN 115726692A
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- 238000005553 drilling Methods 0.000 title claims abstract description 65
- 239000011435 rock Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000000670 limiting effect Effects 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 239000002893 slag Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 15
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 6
- 235000017491 Bambusa tulda Nutrition 0.000 description 6
- 241001330002 Bambuseae Species 0.000 description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 6
- 239000011425 bamboo Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Abstract
The invention discloses a method for forming a hole on an inclined rock surface by rotary drilling, which relates to the technical field of bridge pile foundation construction, and comprises the following steps: measuring lofting hole positions, and embedding steel casings coaxial with the hole positions; arranging a limiter between a drill rod and a barrel drill of the rotary drilling rig, and enabling the limiter to be located in the steel casing; drilling an initial hole to a set position by using a barrel drill; and removing the limiting device, and continuously drilling along the initial hole to the designed depth of the formed hole by using a barrel drill. Due to the limiting effect of the limiting stopper in the steel casing, the concentric coaxiality of the initial hole and the designed hole position is ensured. The problem of among the prior art, meet inclined rock face, adopt conventional construction method, pile position easily takes place the off normal, leads to seriously influencing the pore-forming quality is solved.
Description
Technical Field
The invention relates to the technical field of bridge pile foundation construction, in particular to a method for forming holes on an inclined rock surface by rotary drilling.
Background
The rotary drilling rig is widely applied to bridge pile foundation construction due to the characteristics of flexible movement, high working efficiency, good construction quality and less mud pollution.
In the prior art, the rotary drilling construction mostly adopts a full-section drill bit to continuously drill in a soil layer, when a rock stratum is encountered, a small-diameter barrel drill is firstly adopted to take cores, and then the barrel drill with gradually increased diameter is utilized to respectively perform reaming drilling on the aperture of the previous stage. When the inclined rock surface is encountered, the conventional construction method is adopted, the pile position is easy to deviate, and the hole forming quality is seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for drilling a hole on an inclined rock surface by rotary drilling. The problem that pile positions are easy to deviate by adopting a conventional construction method when an inclined rock surface is encountered in the prior art, so that the hole forming quality is seriously influenced can be solved.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method for forming the hole by rotary drilling on the inclined rock surface comprises the following steps:
measuring a lofting hole position, and embedding a steel casing coaxial with the hole position;
arranging a limiter between a drill rod and a barrel drill of the rotary drilling rig, and enabling the limiter to be located in the steel casing;
drilling an initial hole to a set position by using a barrel drill;
and removing the limiting device, and continuously drilling along the initial hole to the designed depth of the formed hole by using a barrel drill.
In some optional schemes, after drilling with the barrel drill along the initial hole to the designed depth of the formed hole, the method further comprises: and reaming the drilled hole to a set diameter.
In some alternatives, reaming the initial bore to a set diameter comprises:
and arranging a next-stage cylindrical drill with a larger diameter between a drill rod and a cylindrical drill of the rotary drilling rig to enable the cylindrical drill to be positioned in the drilled hole, drilling and expanding the hole to a designed depth by using the next-stage cylindrical drill, and circulating the step until the drilled hole reaches the set aperture.
In some optional schemes, before the next stage of barrel drilling and reaming are carried out to the designed depth, the slag removing drill bit is used for cleaning rock slag in the drilled hole.
In some alternatives, the set position is a position at which the barrel drill initiates drilling of the initial hole to the point at which the stop comes into contact with the rock face.
In some alternatives, the outside diameter of the stopper is 10cm smaller than the inside diameter of the steel casing.
In some optional schemes, the height of the steel casing is 3m, and the thickness is 2cm.
In some alternatives, the stopper includes: a base shaft; the connecting seats and the connecting rods are positioned at two ends of the base shaft, the connecting seats are used for being connected with a drill rod of the rotary drilling rig, and the connecting rods are used for being connected with the cylindrical drill; the limiting cylinder is sleeved outside the base shaft; and the limiting supports are arranged in the circumferential direction of the base shaft at intervals, and two ends of the limiting supports are respectively connected with the base shaft and the limiting cylinder body.
In some optional schemes, the height of the limiting cylinder body is 1m, and the thickness is 2cm.
In some optional schemes, the stopper further comprises a plurality of rubber sheets, and the plurality of rubber sheets are arranged at intervals in the circumferential direction outside the limiting cylinder body.
Compared with the prior art, the invention has the advantages that: and before rotary drilling, measuring lofting hole positions, and embedding steel casings coaxial with the hole positions. A limiter is arranged between a drill rod and a barrel drill of the rotary drilling rig, the limiter is positioned in the steel casing to play a limiting role, and the opened initial hole and the designed hole position are concentric and coaxial. And after the limiting device is detached, the barrel drill is used for continuously drilling along the initial hole to the designed depth of the formed hole. The problem of among the prior art, meet inclined rock face, adopt conventional construction method, pile position easily takes place the off normal, leads to seriously influencing the pore-forming quality is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a construction process flow in an embodiment of the present invention;
FIG. 2 is a schematic illustration of an embodiment of the present invention illustrating the use of a stop and a barrel drill to drill an initial hole;
FIG. 3 is a schematic diagram of the embodiment of the present invention illustrating the operation of reaming a drilled hole with a barrel drill;
FIG. 4 is a schematic front view of a retainer in accordance with an embodiment of the present invention;
FIG. 5 is a schematic top view of a retainer in accordance with an embodiment of the present invention;
FIG. 6 is a schematic front view of a barrel drill in an embodiment of the present invention;
FIG. 7 is a schematic top view of a barrel drill in an embodiment of the present invention;
FIG. 8 is a schematic view of the connection of the stop to the barrel drill in an embodiment of the present invention;
FIG. 9 is a schematic view of the connection of the barrel drill to the barrel drill in an embodiment of the present invention;
in the figure: 1. a rotary drilling rig; 2. a steel casing; 3. barrel drilling; 300. a middle shaft; 301. a barrel; 302. reinforcing ribs; 303. drilling teeth; 304. a barrel drill connecting seat; 305. a barrel drill connecting rod; 4. a stopper; 400. a base shaft; 401. a limiting cylinder body; 402. limiting and supporting; 403. a rubber sheet; 404. a connecting seat; 405. a connecting rod; 5. and (7) drilling a rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the invention provides a method for drilling a hole on an inclined rock surface by rotary drilling, which comprises the following steps:
s1: site cleaning and leveling, measuring lofting hole sites, and embedding the steel pile casing 2.
Specifically, sundries in an operation area are cleaned, a field is arranged, and a total station is used for positioning and marking the center of a pile hole. The center of the steel pile casing 2 is coincided with the center of the designed pile hole, and after the position of the steel pile casing 2 is determined, soil is symmetrically filled around the steel pile casing 2 and tamped. The steel casing 2 is prepared for subsequent drilling construction, and plays a role in limiting and protecting support.
Preferably, the height of the steel casing 2 is 3m, the thickness is 2cm, the outer diameter is 3.2m, and when the steel casing 2 is embedded, the height of 30cm is ensured to be above the ground. The steel protects a section of thick bamboo 2 and has sufficient height and thickness assurance intensity, guarantees the reliability that a section of thick bamboo 2 supported.
S2: and arranging a stopper 4 to enable the stopper 4 to be positioned in the steel casing 2.
Specifically, a limiter 4 is arranged between a drill rod 5 and a barrel drill 3 of the rotary drilling rig 1, the limiter 4 is located in the steel casing 2, and the limiter 4 is used for being closely attached to the inner wall of the steel casing 2 for limiting. And ensuring that the hole position and the verticality are consistent with the designed hole position when drilling.
Preferably, the stopper 4 has an outer diameter of 3.1m, which is 10cm smaller than the inner diameter of the steel casing 2. A certain buffer area is reserved while the limiting effect of the limiter 4 is ensured.
Preferably, as shown in fig. 4, 5 and 8, the stopper 4 includes: a base shaft 400; the connecting base 404 and the connecting rod 405 are positioned at two ends of the base shaft 400, the connecting base 404 is used for being connected with a drill rod 5 of the rotary drilling rig 1, and the connecting rod 405 is used for being connected with the cylindrical drill 3; a limiting cylinder 401 sleeved outside the base shaft 400; and a plurality of limit supports 402 which are arranged at intervals in the circumferential direction of the base shaft 400, and both ends of which are respectively connected with the base shaft 400 and the limit cylinder 401. Sufficient strength is provided to the stopper 4 to ensure the stopper effect.
Preferably, the connecting base 404 is detachably connected with the drill rod 5 through a pin; the connecting rod 405 is detachably connected with the barrel drill 3 through a pin shaft, the length of the connecting rod is 0.4m, and a rod piece with the same section as the drill rod 5 is adopted. The stopper 4 is convenient to be connected with and detached from the drill rod 5 and the barrel drill 3.
Preferably, the height of the limiting cylinder 401 is 1m, and the thickness is 2cm.
Preferably, the stopper 4 further includes a plurality of rubber sheets 403, and the plurality of rubber sheets 403 are disposed at intervals in the circumferential direction outside the stopper cylinder 401. When the stopper 4 has a limiting function in the steel casing 2, the rubber sheet 403 can have a buffering and shock-absorbing function.
S3: the initial hole is drilled to a set position using a barrel drill 3.
Specifically, under the limiting action of the limiter 4, the barrel drill 3 is used for drilling and tapping, and when the barrel drill 3 drills to a set position, the drilled hole is an initial hole.
Preferably, the set position is such that the barrel drill 3 drills the initial hole to the corresponding position at which the stopper 4 comes into contact with the rock face. Subsequent drilling operations will continue based on the initial hole.
Preferably, as shown in fig. 6, 7 and 9, the barrel drill 3 includes: middle axle 300, barrel 301, barrel drill coupling seat 304, a plurality of strengthening ribs 302 and a plurality of drill teeth 303. The barrel 301 is sleeved on the outer side of the middle shaft 300 and is made of a steel plate, the height of the barrel 301 is 3m, and the thickness of the barrel 301 is 2cm; the barrel drill connecting seat 304 is positioned at the top end of the middle shaft 300 and is used for being connected with the limiter 4 through a pin shaft; a plurality of reinforcing ribs 302 which are arranged at intervals in the circumferential direction of the middle shaft 300, and both ends of the reinforcing ribs are respectively connected with the middle shaft 300 and the cylinder 301; the plurality of drilling teeth 303 are arranged in the circumferential direction of the outer side of the bottom end of the barrel 301 at intervals, and the drilling teeth 303 are made of alloy materials suitable for hard rock layer tunneling.
S4: and (4) removing the limiting device 4, and continuously drilling along the initial hole to the designed depth of the formed hole by using the barrel drill 3.
Specifically, after the barrel drill 3 is inserted into the initial hole, the initial hole plays a limiting role for the barrel drill 3, and the barrel drill 3 is utilized to continuously drill to the designed depth of the formed hole.
Preferably, the barrel drill attachment mount 304 is also adapted to be pinned to the drill rod 5.
S5: after drilling along the initial hole to the designed depth of the formed hole by using the barrel drill 3, the method further comprises the following steps: and reaming the drilled hole to a set diameter.
Specifically, reaming an initial bore to a set diameter includes: set up the bigger next grade section of thick bamboo of diameter and bore 3 between the drilling rod 5 of the rig 1 soon and bore 3, make section of thick bamboo bore 3 be located the drilling and laminate with the pore wall, play 3 spacing effects to next grade section of thick bamboo bores, the straightness that hangs down of pore-forming when guaranteeing the reaming utilizes the next grade section of thick bamboo to bore 3 reamings to the design depth. This step is cycled until the drilled hole reaches the set hole diameter.
Preferably, the slag in the drilled hole is cleaned by the slag tapping drill before the next stage of the barrel drill 3 is used for reaming to the designed depth.
Preferably, the barrel drill 3 further comprises a barrel drill connecting rod 305 located at the bottom end of the central shaft 300; the barrel drill connecting seat 304 can also be used for connecting with a barrel drill connecting rod 305 of the next stage barrel drill 3 through a pin shaft.
Preferably, taking three-stage reaming as an example, the used barrel drills 3 are sequentially arranged into a first barrel drill to a fourth barrel drill from small to large in diameter, and the diameters of the first barrel drill to the fourth barrel drill are sequentially 1.5m, 2m, 2.5m and 3m. At this time, the drilled hole is a pile hole with a diameter of 1.5m drilled by the first barrel drill. And connecting the second barrel drill between the drill rod 5 and the first barrel drill through the pin shaft, and inserting the first barrel drill into the drilled hole to limit the second barrel drill. Drilling was continued to the design depth with a second drum drill, reaming the drilled hole to a diameter of 2m. And analogizing in turn, arranging a third barrel drill between the drill rod 5 and the second barrel drill, reaming the drilled hole to be 2.5m in diameter by using the third barrel drill, arranging a fourth barrel drill between the drill rod 5 and the third barrel drill, and reaming the drilled hole to be 3m by using the fourth barrel drill.
Preferably, the method has the greatest advantage on the large-inclination rock face with the included angle of 60-70 degrees between the rock face and the horizontal plane compared with the conventional construction method.
In conclusion, the limiting device 4 is arranged between the drill rod 5 and the cylindrical drill 3 of the rotary drilling rig, the limiting device 4 is positioned in the steel casing 2 to play a limiting role, and the opened initial hole and the designed hole position are concentric and coaxial. After the limiting device 4 is removed, the barrel drill 3 is used for continuously drilling along the initial hole to the designed depth of the formed hole. Meanwhile, when the hole expanding drilling is needed, the next-stage barrel drill 3 is arranged between the drill rod 5 and the barrel drill 3, so that the barrel drill 3 plays a role in limiting the next-stage barrel drill 3 during the hole expanding drilling. The problem of among the prior art, meet the inclined rock face, adopt conventional construction method, the pile position easily takes place the off normal, leads to seriously influencing the pore-forming quality is solved. Meanwhile, the problem of low construction efficiency caused by repeated reworking on the inclined rock surface in the conventional construction method is solved.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for forming a hole in an inclined rock surface by rotary drilling is characterized by comprising the following steps:
measuring a lofting hole position, and embedding a steel casing (2) which is coaxial with the hole position;
arranging a limiter (4) between a drill rod (5) and a barrel drill (3) of the rotary drilling rig (1), and enabling the limiter (4) to be located in the steel casing (2);
drilling an initial hole to a set position by using a barrel drill (3);
and (4) detaching the limiting device (4), and continuously drilling along the initial hole to the designed depth of the formed hole by using the barrel drill (3).
2. The method for rotary drilling of the hole in the inclined rock face as claimed in claim 1, wherein after the drilling is continued to the designed depth of the hole along the initial hole by using the barrel drill (3), the method further comprises: and reaming the drilled hole to a set diameter.
3. The method for rotary drilling of the hole in the inclined rock face according to claim 2, wherein the step of reaming the initial hole to a set diameter comprises the following steps:
and arranging a next-stage cylindrical drill (3) with a larger diameter between a drill rod (5) and the cylindrical drill (3) of the rotary drilling rig (1), enabling the cylindrical drill (3) to be located in the drilled hole, reaming to a designed depth by utilizing the next-stage cylindrical drill (3), and circulating the step until the drilled hole reaches a set aperture.
4. The method for forming the hole by the rotary drilling on the inclined rock surface as claimed in claim 2, characterized in that before the hole is expanded to the designed depth by the next-stage barrel drill (3), the slag in the drilled hole is cleaned by the slag removing drill bit.
5. The method for rotary drilling of the hole in the inclined rock face as claimed in claim 1, characterized in that the set position is a position from the initial hole drilling of the barrel drill (3) to the corresponding position when the stopper (4) is in contact with the inclined rock face.
6. The method for rotary drilling of a hole in an inclined rock face as claimed in claim 1, characterized in that the outer diameter of the stopper (4) is 10cm smaller than the inner diameter of the steel casing (2).
7. The method for rotary drilling of the hole in the inclined rock surface as claimed in claim 1, wherein the height of the steel casing (2) is 3m, and the thickness is 2cm.
8. The method for rotary drilling of a hole in an inclined rock face as claimed in claim 1, wherein the stopper (4) comprises:
a base shaft (400);
the connecting device comprises a connecting seat (404) and a connecting rod (405) which are positioned at two ends of a base shaft (400), wherein the connecting seat (404) is used for being connected with a drill rod (5) of the rotary drilling rig (1), and the connecting rod (405) is used for being connected with a cylindrical drill (3);
the limiting cylinder (401) is sleeved on the outer side of the base shaft (400);
and the limiting supports (402) are arranged at intervals in the circumferential direction of the base shaft (400), and two ends of the limiting supports are respectively connected with the base shaft (400) and the limiting cylinder body (401).
9. The method for rotary drilling of the hole in the inclined rock surface as claimed in claim 8, wherein the height of the limiting cylinder (401) is 1m, and the thickness is 2cm.
10. The method for rotary drilling of the hole in the inclined rock surface as claimed in claim 8, wherein the stopper (4) further comprises a plurality of rubber sheets (403), and the plurality of rubber sheets (403) are arranged at intervals in the circumferential direction outside the stopper cylinder (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211449758.4A CN115726692A (en) | 2022-11-18 | 2022-11-18 | Method for forming hole in inclined rock surface by rotary drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211449758.4A CN115726692A (en) | 2022-11-18 | 2022-11-18 | Method for forming hole in inclined rock surface by rotary drilling |
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| Publication Number | Publication Date |
|---|---|
| CN115726692A true CN115726692A (en) | 2023-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211449758.4A Pending CN115726692A (en) | 2022-11-18 | 2022-11-18 | Method for forming hole in inclined rock surface by rotary drilling |
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| CN (1) | CN115726692A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116696332A (en) * | 2023-04-20 | 2023-09-05 | 中交第四航务工程局有限公司 | Composite drill bit accurate positioning device for rotary pile digger on barge |
| CN116856408A (en) * | 2023-09-04 | 2023-10-10 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
-
2022
- 2022-11-18 CN CN202211449758.4A patent/CN115726692A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116696332A (en) * | 2023-04-20 | 2023-09-05 | 中交第四航务工程局有限公司 | Composite drill bit accurate positioning device for rotary pile digger on barge |
| CN116696332B (en) * | 2023-04-20 | 2024-03-01 | 中交第四航务工程局有限公司 | Composite drill bit accurate positioning device for rotary pile digger on barge |
| CN116856408A (en) * | 2023-09-04 | 2023-10-10 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
| CN116856408B (en) * | 2023-09-04 | 2023-11-07 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
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Effective date of registration: 20240312 Address after: 430050 No. 38, Hanyang Avenue, Hanyang District, Hubei, Wuhan Applicant after: CHINA RAILWAY MAJOR BRIDGE ENGINEERING GROUP Co.,Ltd. Country or region after: China Applicant after: China National Railway Group Co.,Ltd. Address before: 430050 No. 38, Hanyang Avenue, Hanyang District, Hubei, Wuhan Applicant before: CHINA RAILWAY MAJOR BRIDGE ENGINEERING GROUP Co.,Ltd. Country or region before: China |
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