CN110259386B - High-pressure jet grouting drill bit - Google Patents
High-pressure jet grouting drill bit Download PDFInfo
- Publication number
- CN110259386B CN110259386B CN201910649041.6A CN201910649041A CN110259386B CN 110259386 B CN110259386 B CN 110259386B CN 201910649041 A CN201910649041 A CN 201910649041A CN 110259386 B CN110259386 B CN 110259386B
- Authority
- CN
- China
- Prior art keywords
- drill bit
- grouting
- holes
- sleeve
- pipe
- 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.)
- Active
Links
- 239000011440 grout Substances 0.000 claims abstract description 34
- 238000005553 drilling Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims 2
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007569 slipcasting Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention provides a high-pressure jet grouting drill bit, which belongs to a grouting drill bit, and comprises a threaded pipe, an open hole pipe and a drill bit part, wherein the threaded pipe and the open hole pipe are integrally formed; the sleeve is sleeved outside the perforated pipe, two ends of the sleeve are respectively abutted against the threaded pipe and the drill bit part, a first hole group and a second hole group are formed in the side wall of the sleeve, the first hole group comprises five grout outlet holes corresponding to the five grouting holes, and the second hole group comprises three grout outlet holes corresponding to the three grouting holes; the problem of the drill bit idle, cause the wasting of resources is solved.
Description
Technical Field
The invention relates to a grouting drill bit, in particular to a high-pressure jet grouting drill bit.
Background
At present, in foundation pit or side slope supporting engineering, the anchor cable is of a common supporting type, and for common good geological conditions, the conventional anchor cable construction mode can meet the requirements; however, in the case of a bottom layer containing pebbles and gravel, in order to prevent the hole collapse after hole introduction, a high-pressure jet grouting drill is usually used to inject slurry into the bottom layer, so that the supporting strength of the hole is enhanced.
The existing grouting drill bit comprises a threaded pipe and a drill bit part integrally connected with the threaded pipe, wherein the drill bit part is hollow, and a plurality of grouting holes are formed in the outer wall of the drill bit part.
The grouting drill bit is arranged on a drill rod of a grouting machine, rotates simultaneously in the grouting process, and the slurry is thrown out from a grouting hole in the rotating process, is beaten into soil and is mixed with the soil to form an injection molding body with higher strength.
However, the above technical solution has the following problems: in foundation pit supporting engineering of different geology, grouting drill bits with different flow rates are needed to ensure that the slurry can be fully utilized, so that workers are required to purchase drill bits with different grouting hole numbers at the same time, but in most cases, only one of the drill bits is used, and other drill bits are idle, so that resource waste is caused, and the improvement is needed.
Disclosure of Invention
Therefore, the invention aims to provide a high-pressure jet grouting drill bit so as to solve the problem of resource waste caused by idle drill bit.
The technical aim of the invention is realized by the following technical scheme:
the high-pressure jet grouting drill bit comprises a threaded pipe, an open hole pipe and a drill bit part, wherein the threaded pipe and the open hole pipe are integrally formed, the drill bit part is in threaded connection with the end part of the open hole pipe, the inner cavity of the open hole pipe is communicated with the threaded pipe, and five grouting holes are formed in the side wall of the open hole pipe; the drilling pipe is sleeved with a sleeve, two ends of the sleeve are respectively abutted to the threaded pipe and the drill bit, a first hole group and a second hole group are formed in the side wall of the sleeve, the first hole group comprises five grout outlet holes corresponding to five grouting holes, and the second hole group comprises three grout outlet holes corresponding to three grouting holes.
Preferably, the two ends of the sleeve are a first end and a second end respectively, when the first end is propped against the drill bit, the five grout outlets of the first hole group are aligned with the five grout outlets respectively, and when the second end is propped against the drill bit, the three grout outlets of the second hole group are aligned with the three grout outlets respectively.
Through adopting above-mentioned technical scheme, the staff can be earlier with screw thread pipe threaded connection to the drilling rod of slip casting machine, then screw off the drill bit, and take out the sleeve pipe, if need big discharge capacity ground slip casting, the staff can support the sleeve in the direction of screw thread pipe along the second end, the cover is outside the trompil pipe, rotatory sleeve makes five grouting holes and five play thick liquid holes align, screw on the drill bit, just make telescopic first end support on the drill bit, telescopic fixed principle utilizes screw thread pipe and drill bit to telescopic clamping force in order to fix the sleeve, if need the slip casting of little discharge capacity ground, the staff can support the sleeve in the direction of screw thread pipe along first end, the cover is outside the trompil pipe, rotatory sleeve makes three grouting holes and three play thick liquid holes align, other two grouting holes are held up by telescopic inner wall, afterwards screw on the drill bit, just make telescopic second end support on the drill bit. In conclusion, the simple and convenient switching of three grouting holes and five grouting holes by using one drill bit can be completed by only changing the sleeved direction of the sleeve, so that a worker can realize the switching of two grouting amounts by only purchasing one drill bit, and the situations of idle drill bit and resource waste caused by purchasing too many drill bits are avoided.
Preferably, four of the grouting holes are positioned at four corners of a rectangle, and the center of the rectangle is positioned on the axis of the open hole pipe.
Preferably, when the sleeve is rotated 180 ° along its axis, four of the grout outlets are aligned with four grout holes respectively, and the remaining one of the grout outlets is offset from the remaining one of the grout outlets.
Through adopting above-mentioned technical scheme, the staff can utilize the sleeve to switch five grouting holes and four grouting holes, has increaseed the suitability of drill bit.
Preferably, two positioning blocks are arranged on the outer wall of the end part of the perforated pipe, which is close to the threaded pipe, the two positioning blocks are symmetrical about the axis of the perforated pipe, and positioning grooves which are in plug-in fit with the positioning blocks are formed in the inner walls of the two ends of the sleeve.
Through adopting above-mentioned technical scheme, the grafting cooperation of locating piece and constant head tank can prevent when the drill bit rotates, and the sleeve takes place the position skew, causes the condition of slip casting hole and play thick liquid hole dislocation.
Preferably, the positioning block is a trapezoid block, and the positioning groove is a trapezoid groove.
Through adopting above-mentioned technical scheme, can make things convenient for the staff to take out the sleeve from trompil pipe department.
Preferably, the aperture of the grouting hole is between 0.8 cm and 1.5cm, and the aperture of the grouting hole is 0.2cm larger than that of the grouting hole.
By adopting the technical scheme, slight errors can be generated in the alignment process of the grouting holes and the grouting holes, so that the grouting holes are slightly larger than the grouting holes in diameter, and the influence of the errors on the grouting speed can be avoided.
Preferably, the diameter of the grouting hole is 1.2cm, and the diameter of the grouting hole is 1.4cm.
The high-pressure jet grouting drill bit provided by the invention has the following advantages:
1. the staff can realize the switching among three grouting holes, four grouting holes and five grouting holes by using one drill bit, so that the idle resource waste caused by purchasing multiple drill bits is avoided;
2. can be realized without adding excessive mechanical structures, and is convenient to operate.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a perspective cross-sectional view of a first hole set of the present invention mated with a grouting hole;
FIG. 4 is a perspective cross-sectional view of a second hole set of the present invention mated with a grouting hole;
fig. 5 is a perspective cross-sectional view of the sleeve rotated 180 ° along the axis of the sleeve on the basis of fig. 3.
The reference numerals in the drawings are as follows:
1. a threaded tube; 2. a perforated pipe; 3. a drill part; 4. grouting holes; 5. a sleeve; 501. a first end; 502. a second end; 6. a first set of holes; 7. a second set of holes; 8. a pulp outlet hole; 9. a positioning block; 10. and a positioning groove.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The utility model provides a high pressure jet grouting drill bit, as shown in fig. 1 and 2, including screwed pipe 1, trompil pipe 2 and drill bit portion 3, screwed pipe 1 and trompil pipe 2 integrated into one piece, drill bit portion 3 threaded connection is in the tip of trompil pipe 2, trompil pipe 2 inner chamber and screwed pipe 1 intercommunication, and five grouting holes 4 have been seted up to the lateral wall.
The sleeve 5 is sleeved outside the perforated pipe 2, two ends of the sleeve 5 are respectively abutted against the threaded pipe 1 and the drill bit part 3, and in order to ensure that the two ends of the sleeve 5 are respectively abutted against the threaded pipe 1 and the drill bit part 3, the outer diameter of the joint of the drill bit part 3 and the perforated pipe 2 is larger than that of the perforated pipe 2, and the outer diameter of the joint of the threaded pipe 1 and the perforated pipe 2 is larger than that of the perforated pipe 2;
the side wall of the sleeve 5 is provided with a first set of holes 6 and a second set of holes 7.
The first hole group 6 includes five grout outlet holes 8 corresponding to the positions of the five grouting holes 4, and the second hole group 7 includes three grout outlet holes 8 corresponding to the positions of three of the grouting holes 4.
As shown in fig. 2 to 4, the sleeve 5 has a first end 501 and a second end 502 at two ends, and when the first end 501 abuts against the drill bit 3, the five grout outlets 8 of the first hole set 6 are aligned with the five grout holes 4, respectively, and when the second end 502 abuts against the drill bit 3, the three grout outlets 8 of the second hole set 7 are aligned with the three grout holes 4, respectively.
To ensure that the second hole set 7 is aligned with the pulp outlet 8 after the sleeve 5 has been turned around, the distance between the first hole set 6 and the first end 501 may be set equal to the distance between the second hole set 7 and the second section.
The realization principle of solving the technical problems is as follows: the staff can first screw the threaded pipe 1 onto the drill rod of the grouting machine, then unscrew the drill bit 3, take out the sleeve, if grouting with large displacement is needed, the staff can put the sleeve 5 along the direction of the second end 502 against the threaded pipe 1, sleeve outside the perforated pipe 2, rotate the sleeve 5 to align the five grouting holes 4 with the five grouting holes 8, screw the drill bit 3 so that the first end 501 of the sleeve 5 is abutted against the drill bit 3, the fixing principle of the sleeve 5 utilizes the clamping force of the threaded pipe 1 and the drill bit 3 on the sleeve 5 to fix the sleeve 5, if grouting with small displacement is needed, the staff can put the sleeve 5 along the direction of the first end 501 against the threaded pipe 1, sleeve the perforated pipe 2, rotate the sleeve 5 to align the three grouting holes 4 with the three grouting holes 8, the other two grouting holes 4 are blocked by the inner wall of the sleeve 5, and then screw the drill bit 3 so that the second end 502 of the sleeve 5 is abutted against the drill bit 3. In summary, only change sleeve 5 direction of embolia, can accomplish and utilize a drill bit to realize the simple and convenient switching of three grouting holes 4 and five grouting holes 4, let the staff just need purchase a drill bit from this, just can realize the switching of two kinds of grouting volume, avoid purchasing too much drill bit, cause the drill bit idle, the condition of wasting of resources.
Two positioning blocks 9 are arranged on the outer wall of the end part of the open-hole pipe 2, which is close to the threaded pipe 1, the two positioning blocks 9 are symmetrical relative to the axis of the open-hole pipe 2, and positioning grooves 10 which are in plug-in fit with the positioning blocks 9 are formed in the inner walls of the two ends of the sleeve 5; the plugging fit of the positioning block 9 and the positioning groove 10 can prevent the situation that the grouting holes 4 and the grout outlet holes 8 are misplaced due to the position deviation of the sleeve 5 when the drill bit rotates.
Fig. 2 only illustrates the positioning groove 10 at one end of the sleeve, and the positioning groove 10 at the other end is opened in the same principle.
The positioning block 9 is a trapezoid block, and the positioning groove 10 is a trapezoid groove; the sleeve 5 can be conveniently pulled out of the perforated pipe 2 by a worker.
The aperture of the grouting hole 4 is between 0.8 cm and 1.5cm, and the aperture of the grouting hole 8 is 0.2cm larger than the aperture of the grouting hole 4; a slight error may be generated in the alignment process of the grouting holes 4 and 8, so that the grouting holes 8 are slightly larger than the grouting holes 4 in diameter, and the influence of the error on the grouting speed can be avoided.
In the preferred embodiment, the diameter of the grouting holes 4 in the present invention is 1.2cm, and the diameter of the grout outlet holes 8 is 1.4cm.
In order to allow the present invention to also open four grouting holes 4, the following is further provided.
As shown in fig. 3 and 5, four of the grouting holes 4 are located at four corners of a rectangle, and the center of the rectangle is located on the axis of the perforated pipe 2.
When the sleeve 5 is rotated 180 ° along its axis, the four grout outlet holes 8 are aligned with the four grout outlet holes 4, respectively, and the remaining one of the grout outlet holes 8 is offset from the remaining one of the grout outlet holes 4.
The staff can utilize sleeve 5 to switch five grouting holes 4 and four grouting holes 4, has enlarged the suitability of drill bit.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (6)
1. The high-pressure jet grouting drill bit comprises a threaded pipe (1), an open-pore pipe (2) and a drill bit part (3), wherein the threaded pipe (1) and the open-pore pipe (2) are integrally formed; the drilling device comprises a perforated pipe (2), a sleeve (5) is sleeved outside the perforated pipe (2), two ends of the sleeve (5) are respectively propped against a threaded pipe (1) and a drill bit part (3), a first hole group (6) and a second hole group (7) are formed in the side wall of the sleeve (5), the first hole group (6) comprises five grout outlet holes (8) corresponding to the positions of five grouting holes (4), and the second hole group (7) comprises three grout outlet holes (8) corresponding to the positions of three grouting holes (4);
the two ends of the sleeve (5) are respectively provided with a first end (501) and a second end (502), when the first end (501) is propped against the drill bit part (3), the five grout outlet holes (8) of the first hole group (6) are respectively aligned with the five grout outlet holes (4), and when the second end (502) is propped against the drill bit part (3), the three grout outlet holes (8) of the second hole group (7) are respectively aligned with the three grout outlet holes (4); wherein four grouting holes (4) are positioned at four corners of a rectangle, and the center of the rectangle is positioned on the axis of the open pipe (2).
2. A high pressure rotary jetting tool according to claim 1, characterized in that when the sleeve (5) is rotated 180 ° about its axis, four of the grout outlets (8) are aligned with four grout holes (4) respectively, the remaining one of the grout outlets (8) being offset from the remaining one of the grout holes (4).
3. The high-pressure jet grouting drill bit according to claim 1, wherein two positioning blocks (9) are arranged on the outer wall of the end part, close to the threaded pipe (1), of the perforated pipe (2), the two positioning blocks (9) are symmetrical with respect to the axis of the perforated pipe (2), and positioning grooves (10) in plug-in fit with the positioning blocks (9) are formed in the inner walls of the two ends of the sleeve (5).
4. A high pressure jet grouting drill bit as claimed in claim 3, characterised in that the locating block (9) is a trapezoid block and the locating slot (10) is a trapezoid slot.
5. The high-pressure jet grouting drill head as claimed in claim 1, characterized in that the diameter of the grouting holes (4) is between 0.8 cm and 1.5cm, and the diameter of the grouting holes (8) is 0.2cm larger than the diameter of the grouting holes (4).
6. The high-pressure jet grouting drill head as claimed in claim 5, characterized in that the diameter of the grouting holes (4) is 1.2cm, and the diameter of the grouting holes (8) is 1.4cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910649041.6A CN110259386B (en) | 2019-07-18 | 2019-07-18 | High-pressure jet grouting drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910649041.6A CN110259386B (en) | 2019-07-18 | 2019-07-18 | High-pressure jet grouting drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110259386A CN110259386A (en) | 2019-09-20 |
| CN110259386B true CN110259386B (en) | 2024-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910649041.6A Active CN110259386B (en) | 2019-07-18 | 2019-07-18 | High-pressure jet grouting drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110259386B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356889B (en) * | 2021-07-14 | 2022-07-15 | 哈尔滨工业大学 | Box type reinforcing method for advanced drill pipe right above tunnel |
| CN115404861B (en) * | 2022-10-12 | 2023-09-22 | 驻马店职业技术学院 | High-pressure jet grouting device for civil engineering |
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| FR979272A (en) * | 1949-01-19 | 1951-04-24 | Improvements in the construction of cement pilings by drilling wells | |
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| CN203701124U (en) * | 2014-02-14 | 2014-07-09 | 中南大学 | Pile foundation with cement slurry injected in steel pipe with openings in side wall |
| CN104762972A (en) * | 2015-04-14 | 2015-07-08 | 中国矿业大学 | Sectioned grouting pipe and construction method thereof for soft soil stratum reinforcement |
| CN205421241U (en) * | 2015-12-09 | 2016-08-03 | 中交四航工程研究院有限公司 | Cement mixing method drill bit device |
| CN205954620U (en) * | 2016-07-21 | 2017-02-15 | 刘苏丽 | Stock construction equipment for building |
| CN106567722A (en) * | 2015-10-09 | 2017-04-19 | 山东科技大学 | Novel composite type groutable anchor rod |
| CN206591523U (en) * | 2017-03-31 | 2017-10-27 | 安徽金鹏建设集团股份有限公司 | A kind of foundation engineering special efficient Grouting Pipe |
| CN207004429U (en) * | 2017-06-27 | 2018-02-13 | 张家港保税区永大机械有限公司 | High-pressure rotary-spray unit head |
| CN109869172A (en) * | 2019-03-29 | 2019-06-11 | 攀枝花学院 | The anchor of drilling anchor high-pressure slip-casting one |
| CN210178279U (en) * | 2019-07-18 | 2020-03-24 | 骆波清 | High-pressure rotary jet grouting drill bit |
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2019
- 2019-07-18 CN CN201910649041.6A patent/CN110259386B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR979272A (en) * | 1949-01-19 | 1951-04-24 | Improvements in the construction of cement pilings by drilling wells | |
| CN2647918Y (en) * | 2003-08-29 | 2004-10-13 | 北京市城市建设工程研究院 | Dual plug casting slurry checker pipe |
| KR100605562B1 (en) * | 2005-10-07 | 2006-07-28 | 광성지엠(주) | Multiple grout injector |
| CN102493432A (en) * | 2011-12-09 | 2012-06-13 | 中国建筑西南勘察设计研究院有限公司 | Grouting pipe |
| CN203701124U (en) * | 2014-02-14 | 2014-07-09 | 中南大学 | Pile foundation with cement slurry injected in steel pipe with openings in side wall |
| CN104762972A (en) * | 2015-04-14 | 2015-07-08 | 中国矿业大学 | Sectioned grouting pipe and construction method thereof for soft soil stratum reinforcement |
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| CN205421241U (en) * | 2015-12-09 | 2016-08-03 | 中交四航工程研究院有限公司 | Cement mixing method drill bit device |
| CN205954620U (en) * | 2016-07-21 | 2017-02-15 | 刘苏丽 | Stock construction equipment for building |
| CN206591523U (en) * | 2017-03-31 | 2017-10-27 | 安徽金鹏建设集团股份有限公司 | A kind of foundation engineering special efficient Grouting Pipe |
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| CN109869172A (en) * | 2019-03-29 | 2019-06-11 | 攀枝花学院 | The anchor of drilling anchor high-pressure slip-casting one |
| CN210178279U (en) * | 2019-07-18 | 2020-03-24 | 骆波清 | High-pressure rotary jet grouting drill bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110259386A (en) | 2019-09-20 |
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