CN110924869A - Mute slag-discharging drill bit for construction of bored pile of rotary drilling rig - Google Patents

Mute slag-discharging drill bit for construction of bored pile of rotary drilling rig Download PDF

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Publication number
CN110924869A
CN110924869A CN201911235089.9A CN201911235089A CN110924869A CN 110924869 A CN110924869 A CN 110924869A CN 201911235089 A CN201911235089 A CN 201911235089A CN 110924869 A CN110924869 A CN 110924869A
Authority
CN
China
Prior art keywords
fluted disc
slag
drill bit
disc
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911235089.9A
Other languages
Chinese (zh)
Inventor
吴宁林
刘伯成
陈小文
胡强
刘伟
刘永丽
杨航
陈强
李宣
汪伽宏
章琳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Xinliang mechanical equipment manufacturing Co.,Ltd.
China Tiesiju Civil Engineering Group Co Ltd CTCE Group
Construction Engineering Co Ltd of CTCE Group
Original Assignee
Wuxi Xinliang Mechanical Equipment Manufacturing Co Ltd
Construction Engineering Co Ltd of CTCE Group
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Xinliang Mechanical Equipment Manufacturing Co Ltd, Construction Engineering Co Ltd of CTCE Group filed Critical Wuxi Xinliang Mechanical Equipment Manufacturing Co Ltd
Priority to CN201911235089.9A priority Critical patent/CN110924869A/en
Publication of CN110924869A publication Critical patent/CN110924869A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/42Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/42Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B12/00Accessories for drilling tools
    • E21B12/04Drill bit protectors
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B12/00Accessories for drilling tools
    • E21B12/06Mechanical cleaning devices
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B27/00Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits

Abstract

The invention discloses a mute slag-discharging drill bit for construction of a drilling cast-in-place pile of a rotary drilling rig, which comprises a drilling barrel, a square head upper plate assembly fixed at the top end of the drilling barrel, a left drilling plate and a right drilling plate fixed at the bottom end of the drilling barrel, a slag-discharging plate and a plurality of force transmission rods arranged in the drilling barrel, and a pressure plate which is positioned right above the square head upper plate assembly and is of a circular ring structure, wherein the top ends of the force transmission rods penetrate through the upper plate of the square head upper plate assembly to be fixedly connected with the pressure plate, and the bottom ends of the force transmission rods are fixedly connected with the slag-discharging plate. According to the invention, the pressure plate and the slag discharging plate are fixedly connected through the dowel bar, when the drill bit is lifted out of the hole, the disc on the drill rod presses the pressure plate to push the dowel bar so as to push the slag discharging plate, so that the slag soil in the drill cylinder is quickly pushed out of the drill cylinder, and the drill cylinder can be used for different soil layers, and has low noise and wide application range; in addition, the drill bit is convenient to construct, operation habits of a drilling machine do not need to be changed, construction efficiency is high, cost is saved, and economic benefits are improved.

Description

Mute slag-discharging drill bit for construction of bored pile of rotary drilling rig
Technical Field
The invention relates to the field of drill bits for bored pile construction, in particular to a mute slag-discharging drill bit for bored pile construction of a rotary drilling rig.
Background
With the development of science and technology, the pile foundation is widely applied to the fields of subway construction, stations, airports, house buildings and the like due to large bearing capacity and stable structure, but how to control noise is a difficult point when the existing pile machine is constructed. The current common methods are: the drill rod is rotated forward and backward quickly to drive the drill bit to throw away the muck; the main cable is quickly retracted and released, so that the slag soil in the drill bit is shaken out. However, from the construction point of view, the defects mainly comprise that 1, long-term shaking of the main cable can accelerate the aging speed of the cable. 2. For a cohesive soil layer, the residual soil is difficult to throw out, and the efficiency is low. 3. Rotating the drill rod quickly can produce a loud noise.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a mute slag-removing drill bit for construction of a bored pile of a rotary drilling rig, which can reduce construction noise during drilling and can quickly remove slag in the drill bit.
The technical scheme of the invention is as follows:
a silent slag-discharging drill bit for the construction of a drilling cast-in-place pile of a rotary drilling machine comprises a drilling barrel, a square head upper disc assembly fixed at the top end of the drilling barrel, a left and a right drilling plates fixed at the bottom end of the drilling barrel, a slag-discharging disc and a plurality of force transmission rods arranged in the drilling barrel, and a pressure disc which is positioned right above the square head upper disc assembly and is of a circular structure, wherein the square head upper disc assembly comprises an upper disc and a square head reinforcing rib plate fixed on the upper end surface of the upper disc, the top ends of the force transmission rods penetrate through the upper disc and are fixedly connected with the pressure disc, the bottom ends of the force transmission rods are fixedly connected with the slag-discharging disc, the left and the right drilling plates comprise a lower ring, a left fluted disc, a right fluted disc and a plurality of cutting teeth fixed on the left fluted disc and the right fluted disc respectively, the top end of the lower ring is fixedly connected with the bottom end of the drilling barrel, the left fluted disc and the right fluted disc are both obliquely arranged, and the fixed points of the left fluted disc and the lower ring are radially symmetrical to the fixed points of the right fluted disc and the lower ring, the bottoms of the left fluted disc and the right fluted disc are both of triangular plate structures, the sharp corners at the bottom ends of the left fluted disc and the right fluted disc are inclined downwards to the circle center of the lower ring, the plurality of cutting teeth are respectively fixed on one side edge of the bottoms of the left fluted disc and the right fluted disc, the cutting teeth on the left fluted disc and the right fluted disc are inclined downwards, and the orientations of the cutting teeth on the left fluted disc and the right fluted disc are different.
And a plurality of wear-resistant strips with arc structures are fixed on the outer wall of the drilling barrel.
The up end of hanging wall on be fixed with a plurality of dowel steel protective sheaths, the top of dowel steel protective sheath all towards the pressure disk, a plurality of dowel steel protective sheaths are located deep floor's periphery, the top of a plurality of dowel steel pass hanging wall and dowel steel protective sheath and pressure disk fixed connection in order.
And each cutting tooth on the left fluted disc and the right fluted disc is fixed on the left fluted disc or the right fluted disc through the corresponding cutting tooth seat.
The inner wall of the drilling barrel is fixedly provided with a plurality of triangular limiting plates, and the triangular limiting plates are fixedly connected with the lower end face of the upper disc.
The wall of the drilling barrel is circumferentially and uniformly opened and is used for reducing downward pressing resistance and draining water.
The square head reinforcing rib plate comprises a square head of a square tubular structure consisting of four rib plates, four outer rib plates which are positioned on the periphery of the square head and are fixedly connected with the corners of the square head respectively and four L-shaped hoops which are fixed at the top end of the square head, wherein the four L-shaped hoops are respectively and tightly connected with four corners of the top end of the square head, the bottom ends of the square head and the outer rib plates are fixed on the upper plate, and the upper plate is provided with a square opening communicated with the square head.
The pressure disk with arrange the sediment dish on all be provided with a plurality of through-holes, the top of a plurality of dowel bars penetrate a plurality of through-holes of pressure disk and with pressure disk welded fastening, the bottom of a plurality of dowel bars penetrate a plurality of through-holes of arranging the sediment dish and with arrange sediment dish welded fastening.
The inner ring of the pressure plate is provided with four arc-shaped notches, and four L-shaped hoops of the square-head reinforcing rib plate can conveniently penetrate through the pressure plate when the pressure plate is pressed downwards.
The invention has the advantages that:
(1) the pressure plate and the slag discharging plate are fixedly connected through the dowel steel, when the drill bit is lifted out of the hole, the disc on the drill rod presses the pressure plate to push the dowel steel to push the slag discharging plate, so that the slag soil in the drill cylinder is quickly pushed out of the drill cylinder, and the drill cylinder can be used for different soil layers, and is low in noise and wide in application range; in addition, the drill bit is convenient to construct, operation habits of a drilling machine do not need to be changed, construction efficiency is high, cost is saved, and economic benefits are improved.
(2) The wear-resistant strips are arranged on the outer wall of the drill cylinder, so that the wear-resistant strips have a great effect on the aperture, and the strength of the drill cylinder is enhanced.
(3) The invention has low noise during construction, can be normally used in places with higher noise control, has strong applicability, can effectively avoid noise pollution generated by construction and improves the working efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an exploded view of the present invention.
FIG. 3 is a schematic structural view of the upper plate assembly of the square head of the present invention.
FIG. 4 is a bottom view of the left and right drill plates of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, a mute slag-discharging drill bit for construction of a drilling cast-in-place pile of a rotary drilling rig comprises a drilling barrel 1, eight wear-resistant strips 2 which are fixed on the outer wall of the drilling barrel 1 and have an arc structure, a square head upper plate assembly fixed at the top end of the drilling barrel 1, a left drilling plate 3 and a right drilling plate 3 fixed at the bottom end of the drilling barrel 1, a slag-discharging plate 4 and four force-transmitting rods 5 which are arranged in the drilling barrel 1, and a pressure plate 6 which is positioned right above the square head upper plate assembly and has an annular structure; the wall of the drilling barrel 1 is circumferentially and uniformly provided with openings 7 for reducing downward pressing resistance and draining water;
referring to fig. 3, the square head upper disc assembly comprises an upper disc 8 and a square head reinforcing rib plate 9 fixed on the upper end surface of the upper disc 8, four dowel bar protecting sleeves 10 are fixed on the upper end surface of the upper disc 8, the top ends of the dowel bar protecting sleeves 10 all face to a pressure plate 6, the four dowel bar protecting sleeves 10 are positioned on the periphery of the square head reinforcing rib plate 9, four through holes are respectively arranged on the pressure plate 6 and a slag discharging disc 4, the top ends of the four dowel bars 5 sequentially penetrate through the upper disc 8 and the dowel bar protecting sleeves 10 and then penetrate through the four through holes of the pressure plate 6 and are welded and fixed, the bottom ends of the four dowel bars 5 penetrate through the four through holes of the slag discharging disc 4 and are welded and fixed with the slag discharging disc 4, four triangular limiting plates 11 are fixed on the inner wall of a drill barrel 1, the triangular limiting plates 11 are all fixedly connected with the lower end surface of the upper disc 8, and are used for limiting the movement of the dowel bars 5, when the, the dowel bar 5 is limited from moving upwards continuously; the square head reinforcing rib plate 9 comprises a square head 91 with a square tubular structure consisting of four rib plates, four outer rib plates 92 which are positioned on the periphery of the square head 91 and are respectively fixedly connected with corners of the square head 91, and four L-shaped anchor ears 93 which are fixed at the top end of the square head 91, the four L-shaped anchor ears 93 are respectively and tightly connected with four corners of the top end of the square head 91, the bottom ends of the square head 91 and the outer rib plates 92 are fixed on the upper disc 8, and the upper disc 8 is provided with a square opening 94 communicated with the square head 91;
referring to fig. 2, four circular arc notches 61 are arranged on the inner ring of the pressure plate 6, so that four L-shaped hoops 93 of the square-head reinforcing rib plate 9 can conveniently penetrate through the pressure plate 6 when the pressure plate 6 is pressed downwards;
referring to fig. 4, the left and right drill plates 3 include a lower ring 31, a left fluted disc 32, a right fluted disc 33, and ten picks 34 fixed on the left fluted disc 32 and the right fluted disc 33 respectively, the top end of the lower ring 31 is fixedly connected with the bottom end of the drill barrel 1, the left fluted disc 32 and the right fluted disc 33 are both arranged obliquely, the top ends of the left fluted disc 32 and the right fluted disc 33 are both fixed on the inner wall of the lower ring 31, and the fixed points of the left fluted disc 32 and the lower ring 31 are radially symmetrical to the fixed points of the right fluted disc 33 and the lower ring 31, the bottoms of the left fluted disc 32 and the right fluted disc 33 are both in a triangular plate structure, the sharp corners at the bottom ends of the left fluted disc 32 and the right fluted disc 33 are both inclined downwards to the circle center of the lower ring 31, every five picks 34 are respectively fixed on one side edge of the bottom of the left fluted disc 32 or the right fluted disc 33 through corresponding pick cutting seats, the picks 34 on the left fluted disc 32 and the right fluted disc 33 are both inclined downwards, and the picks on the left fluted disc 32 are different in orientation from those on the right fluted disc 33.
The working principle of the invention is as follows:
before drilling, the bottom end of a drill rod sequentially passes through the pressure plate 6, the square head 91 and the upper disc 8, and then a fixing piece passes through a connecting hole in the square head 91 to be fixed with the drill rod, so that the drill rod is connected with the drill bit; when the drill rod is lifted, the disc on the drill rod extrudes the pressure plate 6, and the pressure plate 6 presses the slag discharge plate 4 downwards through the dowel bar 5, so that the slag soil in the drill cylinder 1 is quickly pushed out of the drill cylinder 1.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a quiet row of sediment drill bit for digging construction of brill machine drilling bored concrete pile soon which characterized in that: the square head upper disc assembly comprises an upper disc and a square head reinforcing rib plate fixed on the upper end face of the upper disc, the top ends of a plurality of force transmission rods penetrate through the upper disc and are fixedly connected with the pressure disc, the bottom ends of the plurality of force transmission rods are fixedly connected with the slag discharge disc, the left and right drilling plates comprise a lower ring, a left fluted disc, a right fluted disc and a plurality of picks fixed on the left fluted disc and the right fluted disc respectively, the top end of the lower ring is fixedly connected with the bottom end of the drill cylinder, the left fluted disc and the right fluted disc are obliquely arranged, the top ends of the left fluted disc and the right fluted disc are fixed on the inner wall of the lower ring, and the fixed points of the left fluted disc and the lower ring are radially symmetrical with the fixed points of the right fluted disc and the lower ring, the bottom of left fluted disc and right fluted disc is the triangle platelike structure, the equal oblique centre of a circle towards the lower circle of closed angle of left fluted disc and right fluted disc bottom, a plurality of picks be fixed in one of them side edge of left fluted disc and right fluted disc bottom respectively, the pick on left fluted disc and the right fluted disc is equal oblique downwards and on the left fluted disc pick and the right fluted disc pick the orientation difference.
2. The mute slag-discharging drill bit for the construction of the bored pile of the rotary drilling rig according to claim 1, which is characterized in that: and a plurality of wear-resistant strips with arc structures are fixed on the outer wall of the drilling barrel.
3. The mute slag-discharging drill bit for the construction of the bored pile of the rotary drilling rig according to claim 1, which is characterized in that: the up end of hanging wall on be fixed with a plurality of dowel steel protective sheaths, the top of dowel steel protective sheath all towards the pressure disk, a plurality of dowel steel protective sheaths are located deep floor's periphery, the top of a plurality of dowel steel pass hanging wall and dowel steel protective sheath and pressure disk fixed connection in order.
4. The mute slag-discharging drill bit for the construction of the bored pile of the rotary drilling rig according to claim 1, which is characterized in that: and each cutting tooth on the left fluted disc and the right fluted disc is fixed on the left fluted disc or the right fluted disc through the corresponding cutting tooth seat.
5. The mute slag-discharging drill bit for the construction of the bored pile of the rotary drilling rig according to claim 1, which is characterized in that: the inner wall of the drilling barrel is fixedly provided with a plurality of triangular limiting plates, and the triangular limiting plates are fixedly connected with the lower end face of the upper disc.
6. The mute slag-discharging drill bit for the construction of the bored pile of the rotary drilling rig according to claim 1, which is characterized in that: the wall of the drilling barrel is circumferentially and uniformly opened and is used for reducing downward pressing resistance and draining water.
7. The mute slag-discharging drill bit for the construction of the bored pile of the rotary drilling rig according to claim 1, which is characterized in that: the square head reinforcing rib plate comprises a square head of a square tubular structure consisting of four rib plates, four outer rib plates which are positioned on the periphery of the square head and are fixedly connected with the corners of the square head respectively and four L-shaped hoops which are fixed at the top end of the square head, wherein the four L-shaped hoops are respectively and tightly connected with four corners of the top end of the square head, the bottom ends of the square head and the outer rib plates are fixed on the upper plate, and the upper plate is provided with a square opening communicated with the square head.
8. The mute slag-discharging drill bit for the construction of the bored pile of the rotary drilling rig according to claim 1, which is characterized in that: the pressure disk with arrange the sediment dish on all be provided with a plurality of through-holes, the top of a plurality of dowel bars penetrate a plurality of through-holes of pressure disk and with pressure disk welded fastening, the bottom of a plurality of dowel bars penetrate a plurality of through-holes of arranging the sediment dish and with arrange sediment dish welded fastening.
9. The mute slag-discharging drill bit for the construction of the bored pile of the rotary drilling rig according to claim 7, which is characterized in that: the inner ring of the pressure plate is provided with four arc-shaped notches, and four L-shaped hoops of the square-head reinforcing rib plate can conveniently penetrate through the pressure plate when the pressure plate is pressed downwards.
CN201911235089.9A 2019-12-05 2019-12-05 Mute slag-discharging drill bit for construction of bored pile of rotary drilling rig Pending CN110924869A (en)

Priority Applications (1)

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CN201911235089.9A CN110924869A (en) 2019-12-05 2019-12-05 Mute slag-discharging drill bit for construction of bored pile of rotary drilling rig

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911235089.9A CN110924869A (en) 2019-12-05 2019-12-05 Mute slag-discharging drill bit for construction of bored pile of rotary drilling rig

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111395315A (en) * 2020-04-13 2020-07-10 中建二局第二建筑工程有限公司 Construction device and method for building foundation cast-in-place pile
CN113250699A (en) * 2021-06-29 2021-08-13 中国科学院武汉岩土力学研究所 Small-caliber rectangular section vertical shaft excavation method suitable for hard rock
CN113982490A (en) * 2021-11-26 2022-01-28 山东高速路桥装备工程有限公司 Rotary drilling bit suitable for mudstone stratum and rotary drilling construction method
CN114016902A (en) * 2021-10-26 2022-02-08 博建建工有限公司 Soft soil foundation drilling equipment and construction method thereof
CN114151034A (en) * 2021-11-24 2022-03-08 深圳市工勘岩土集团有限公司 Top-pushing type deslagging noise reduction construction method for rotary drilling bucket
CN114151019A (en) * 2021-11-24 2022-03-08 深圳市工勘岩土集团有限公司 Top-pushing slag-tapping noise reduction structure of rotary drilling bucket

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CN201363089Y (en) * 2009-02-16 2009-12-16 颜廷想 Rotary-excavating drill bit of sand
CN201363086Y (en) * 2009-01-20 2009-12-16 颜廷想 Auger drill of rotary drilling rig
CN201627536U (en) * 2009-12-29 2010-11-10 青岛建设集团零零一工程有限公司 Self-detaching type drill bit of rotary drilling rig
CN201943581U (en) * 2010-12-24 2011-08-24 北京市三一重机有限公司 Inner spiral drum-type boring tool
CN202659153U (en) * 2012-07-05 2013-01-09 湖南优力特重工有限公司 Push plate type cylindrical drill
CN202755904U (en) * 2012-07-20 2013-02-27 徐州雷曼机械科技有限公司 Rotary excavating rock-digging bulldozing drilling bucket
CN203978287U (en) * 2014-07-21 2014-12-03 云南建工基础工程有限责任公司 A kind ofly can unload fast native drilling bit of rotary-digging drilling rig
CN205558813U (en) * 2016-03-12 2016-09-07 中天建设集团有限公司 Pick type drill bit
CN211314115U (en) * 2019-12-05 2020-08-21 中铁四局集团建筑工程有限公司 Mute slag-discharging drill bit for construction of bored pile of rotary drilling rig

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201363086Y (en) * 2009-01-20 2009-12-16 颜廷想 Auger drill of rotary drilling rig
CN201363089Y (en) * 2009-02-16 2009-12-16 颜廷想 Rotary-excavating drill bit of sand
CN201627536U (en) * 2009-12-29 2010-11-10 青岛建设集团零零一工程有限公司 Self-detaching type drill bit of rotary drilling rig
CN201943581U (en) * 2010-12-24 2011-08-24 北京市三一重机有限公司 Inner spiral drum-type boring tool
CN202659153U (en) * 2012-07-05 2013-01-09 湖南优力特重工有限公司 Push plate type cylindrical drill
CN202755904U (en) * 2012-07-20 2013-02-27 徐州雷曼机械科技有限公司 Rotary excavating rock-digging bulldozing drilling bucket
CN203978287U (en) * 2014-07-21 2014-12-03 云南建工基础工程有限责任公司 A kind ofly can unload fast native drilling bit of rotary-digging drilling rig
CN205558813U (en) * 2016-03-12 2016-09-07 中天建设集团有限公司 Pick type drill bit
CN211314115U (en) * 2019-12-05 2020-08-21 中铁四局集团建筑工程有限公司 Mute slag-discharging drill bit for construction of bored pile of rotary drilling rig

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111395315A (en) * 2020-04-13 2020-07-10 中建二局第二建筑工程有限公司 Construction device and method for building foundation cast-in-place pile
CN113250699A (en) * 2021-06-29 2021-08-13 中国科学院武汉岩土力学研究所 Small-caliber rectangular section vertical shaft excavation method suitable for hard rock
CN114016902A (en) * 2021-10-26 2022-02-08 博建建工有限公司 Soft soil foundation drilling equipment and construction method thereof
CN114016902B (en) * 2021-10-26 2023-12-08 博建建工集团有限公司 Soft soil foundation drilling equipment and construction method thereof
CN114151034A (en) * 2021-11-24 2022-03-08 深圳市工勘岩土集团有限公司 Top-pushing type deslagging noise reduction construction method for rotary drilling bucket
CN114151019A (en) * 2021-11-24 2022-03-08 深圳市工勘岩土集团有限公司 Top-pushing slag-tapping noise reduction structure of rotary drilling bucket
CN114151034B (en) * 2021-11-24 2024-03-01 深圳市工勘岩土集团有限公司 Rotary drilling bucket pushing type slag discharging noise reduction construction method
CN114151019B (en) * 2021-11-24 2024-03-29 深圳市工勘岩土集团有限公司 Pushing type slag discharging noise reduction structure of rotary drilling bucket
CN113982490A (en) * 2021-11-26 2022-01-28 山东高速路桥装备工程有限公司 Rotary drilling bit suitable for mudstone stratum and rotary drilling construction method

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