CN206902717U - A kind of Grouting Pipe for foundation engineering - Google Patents
A kind of Grouting Pipe for foundation engineering Download PDFInfo
- Publication number
- CN206902717U CN206902717U CN201720507274.9U CN201720507274U CN206902717U CN 206902717 U CN206902717 U CN 206902717U CN 201720507274 U CN201720507274 U CN 201720507274U CN 206902717 U CN206902717 U CN 206902717U
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- Prior art keywords
- grouting pipe
- interior
- injected hole
- pipe
- grouting
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Abstract
The utility model discloses a kind of Grouting Pipe for foundation engineering,The injected hole for solving the problems, such as common Grouting Pipe is easily blocked by sandstone,Its drip irrigation device is,The interior Grouting Pipe being connected to including outer Grouting Pipe and sliding in outer Grouting Pipe,The outer Grouting Pipe is provided with multiple equally distributed outer injected holes,The outer Grouting Pipe lateral wall, which is provided with, prevents that sandstone enters outer injected hole and flexible first retaining piece in ground,Barrier is formed the gap passed through for slurries by the pressure of slurries when outer injected hole and slip casting with outer injected hole under the first retaining piece normality,The interior Grouting Pipe is provided with multiple equally distributed interior injected holes,The interior Grouting Pipe is provided with the second retaining piece for preventing the sandstone into outer Grouting Pipe from entering interior injected hole,The second retaining piece barrier is in interior injected hole both sides and leaves the gap only passed through for slurries,The injected hole for reaching Grouting Pipe is not easy blocked purpose.
Description
Technical field
It the utility model is related to Grouting Pipe, more particularly to a kind of Grouting Pipe for foundation engineering.
Background technology
The total weight basic need ground of building goes to carry, and any building all must have reliable ground.Make
To carry the ground of building load, it is necessary to have enough bearing capacity and stability.In building construction process, it usually needs right
Ground carries out consolidation process, and foundation grouting is a kind of common foundation reinforcement method.It is advanced in the specified location of ground during construction
Row drilling, Grouting Pipe is stretched into hole, the slurries that then will have been configured, by the way that in Grouting Pipe hand-hole, generation is combined with the soil body
Physical reaction, so as to improve soil strength.
The Chinese patent for now retrieving a Publication No. CN2668700Y discloses a kind of Double-layer-tube type slip,
A kind of Double-layer-tube type slip, it includes an outer Grouting Pipe for being provided with several injected holes, and it also includes noting in one
Slurry pipe, interior Grouting Pipe are provided with several injected holes, and outer Grouting Pipe is covered outside interior Grouting Pipe.
But Grouting Pipe tube head need to be inserted during slip casting in ground, a large amount of sandstones are contained in ground, are inserted in Grouting Pipe tube head
During entering ground, sandstone enters in slip casting tube body easily by the injected hole of outer Grouting Pipe, during slip casting, slurries
When being discharged to injected hole, easily the sandstone accumulated in outer Grouting Pipe is taken to slip casting hole site, external Grouting Pipe and interior slip casting
The injected hole of pipe results in blockage, so as to cause slip casting inconvenience even can not slip casting consequence.
Utility model content
The purpose of this utility model is to provide a kind of Grouting Pipe for foundation engineering, have Grouting Pipe outer injected hole and
The advantages of interior injected hole is not easy to be blocked.
Above-mentioned technical purpose of the present utility model technical scheme is that：One kind is used for foundation engineering
Grouting Pipe, including outer Grouting Pipe and sliding be connected to interior Grouting Pipe in outer Grouting Pipe, the outer Grouting Pipe be provided with it is multiple
The outer injected hole of even distribution, the outer Grouting Pipe lateral wall, which is provided with, prevents in ground sandstone to enter outer injected hole and flexible
First retaining piece, pressure and outer injected hole shape of the barrier when outer injected hole and slip casting by slurries under the first retaining piece normality
Into the gap passed through for slurries, the interior Grouting Pipe is provided with multiple equally distributed interior injected holes, and the interior Grouting Pipe is provided with anti-
The sandstone for only entering outer Grouting Pipe enters the second retaining piece of interior injected hole, and the second retaining piece barrier is in interior injected hole both sides
And leave the gap only passed through for slurries.
By using above-mentioned technical proposal, outer Grouting Pipe can effectively protect interior Grouting Pipe, multiple equally distributed outer slip castings
Hole and interior injected hole improve injection speed, and slip casting position, therefore each section in ground are can adjust by Grouting Pipe in sliding
The slip casting put is more uniformly distributed；When Grouting Pipe is stretched into ground, the first retaining piece can effectively prevent the silt in ground from passing through
Outer injected hole enters outer Grouting Pipe, and prevents from causing the blocking of external injected hole, and the slip casting work of outer Grouting Pipe has been effectively ensured；
When there is the situation that silt enters in outer Grouting Pipe, the second retaining piece can effectively prevent the internal injected hole of silt from resulting in blockage, and have
Effect ensure that the slip casting work of interior Grouting Pipe；During slip casting, slurries in interior Grouting Pipe pass through interior injected hole and the second retaining piece
Gap enters in outer Grouting Pipe, and the first retaining piece forms the gap passed through for slurries under the pressure of slurries with outer injected hole, so
Rear slurry is constantly noted in ground, realizes slip casting work, so as to this programme there is outer injected hole and interior injected hole be not easy by
The advantages of blocking.
Of the present utility model further to set, first retaining piece includes the location-plate above and below outer injected hole, institute
State and be fixed with barrier under normality between location-plate and starched in the elastic sheet rubber of outer injected hole, the elastic sheet rubber in slip casting
The pressure of liquid produces outside deformation and forms the gap passed through for slurries with outer injected hole.
By using above-mentioned technical proposal, elastic sheet rubber has certain elasticity, and under normality, two pieces of location-plates are by elasticity
Sheet rubber is fixed on the position that lattice are blocked in outer injected hole, and the sandstone in ground is difficult to enter outer Grouting Pipe by outer injected hole, from
And effectively avoid the blocking of the external injected hole of sandstone；In slip casting, because outer slip casting overpressure increases, slurries are by elastic caoutchouc
Piece outwards pushes up, and elastic sheet rubber is produced deformation and outstanding, and elastic sheet rubber has certain gap with outer injected hole, starches
Liquid is appeared in ground by gap, realizes slip casting work.
It is of the present utility model further to set, first retaining piece include L-shaped bending plate above and below the outer injected hole,
Slid between L-shaped bending plate and barrier is in the barrier piece of outer injected hole and the spring between L-shaped bending plate and barrier piece.
By using above-mentioned technical proposal, barrier piece can slide between bending plate, under normality, under the force of a spring
Barrier piece barrier is difficult to enter outer Grouting Pipe by outer injected hole in the sandstone in outer injected hole, ground, so as to effectively avoid sand
The blocking of the external injected hole of stone；In slip casting, because outer slip casting overpressure increases, slurries outwards push up barrier piece, promote bullet
Spring deformation, barrier piece slide to away from the direction of outer injected hole, so as to which barrier piece has certain gap, slurries with outer injected hole
Appeared by gap in ground, realize slip casting work.
It is of the present utility model further set, second retaining piece include located at interior injected hole both sides and with interior Grouting Pipe
Leave the baffle plate in the gap only passed through for slurries and between baffle plate and the connecting rod that is fixed in interior Grouting Pipe.
By using above-mentioned technical proposal, in the case where there is sandstone to enter outer Grouting Pipe, the two of interior injected hole is fixed on
The baffle plate of side effectively can enter interior Grouting Pipe by barrier sandstone, and the particle of sandstone is larger, slurries can pass through baffle plate and interior Grouting Pipe it
Between gap, and sandstone is difficult to the gap through between baffle plate and interior Grouting Pipe, effectively prevent the stifled of the internal injected hole of sandstone
Plug.
Of the present utility model further to set, the outer Grouting Pipe lower end is provided with the casting head in cone, the slip casting
Head is provided with the connecting portion for being wrapped in outer Grouting Pipe lower end, and the connecting portion protrudes the first barrier in outer Grouting Pipe and outer Grouting Pipe
Part.
By using above-mentioned technical proposal, conical casting head has importing effect, Grouting Pipe is more smoothly inserted into
Ground carries out slip casting work；Connecting portion protrudes outer Grouting Pipe and the first retaining piece, Grouting Pipe is reduced outer note when inserting ground
The chance that slurry pipe body and the first retaining piece contact with the soil body in ground, so as to reduce the machine that sandstone enters outer Grouting Pipe
Meeting.
It is of the present utility model further to set, be fixed with stop grouting plug and lower stop grouting plug in the interior Grouting Pipe, it is described on
Stop grouting plug and lower stop grouting plug, which are abutted and slid, is connected to outer slip casting inside pipe wall.
By using above-mentioned technical proposal, interior Grouting Pipe can be slided by upper stop grouting plug and lower stop grouting plug in outer Grouting Pipe
Move, at the same upper stop grouting plug and lower stop grouting plug can effective barrier slurries, in slip casting, make slurries control in upper stop grouting plug and lower only slurry
Between plug, slip casting position can be controlled by Grouting Pipe in sliding, be more uniformly distributed the slip casting of each fragment position in ground.
Of the present utility model further to set, the interior Grouting Pipe lower end is provided with bottom, and the bottom is located at lower stop grouting plug
Lower section.
By using above-mentioned technical proposal, slurries are made not enter directly into outer slip casting bottom of the tube from interior Grouting Pipe lower end,
Slurries are avoided in outer Grouting Pipe bottom deposit, beneficial to by slurries control between upper stop grouting plug and lower stop grouting plug, so as to beneficial to control
Slip casting position processed.
Of the present utility model further to set, the outer Grouting Pipe is steel pipe, and the interior Grouting Pipe is fiberglass pipe.
By using above-mentioned technical proposal, steel pipe has outstanding hardness and toughness, so as to which outer Grouting Pipe is betted in ground
It is hardly damaged in the environment of slurry, and can effectively protects interior Grouting Pipe；Fiberglass pipe corrosion resistance and good, it is in light weight, intensity is high,
Frictional resistance is small, so as to which interior Grouting Pipe is easy to slide in outer Grouting Pipe, preferably carries out slip casting work.
In summary, the utility model has the advantages that：During slip casting, multiple outer injected holes and interior injected hole improve
Injection speed, slip casting is also evenly；First retaining piece lattice are blocked in the position of outer injected hole, and the sandstone in ground is difficult to by outer
Injected hole enters outer Grouting Pipe, so as to effectively avoid the blocking of the external injected hole of sandstone；Enter when there is silt in outer Grouting Pipe
During situation, baffle plate is fixed on the both sides of interior injected hole, and the gap between baffle plate and interior Grouting Pipe is smaller, and effective barrier enters
The sandstone of outer Grouting Pipe enters interior Grouting Pipe, effectively prevent the blocking of the internal Grouting Pipe of sandstone, so as to which this programme has outer note
The advantages of slurry hole and interior injected hole are not easy to be blocked.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment 1；
Fig. 2 is the enlarged drawing at A in Fig. 1；
Fig. 3 is the structural representation of the first retaining piece in embodiment 2.
Reference：1st, outer Grouting Pipe；11st, outer injected hole；12nd, casting head；13rd, connecting portion；2nd, interior Grouting Pipe；21st, it is interior
Injected hole；22nd, upper stop grouting plug；23rd, lower stop grouting plug；24th, bottom；3rd, the first retaining piece；31st, location-plate；32nd, elastic sheet rubber；
33rd, L-shaped bending plate；34th, barrier piece；35th, spring；4th, the second retaining piece；41st, baffle plate；42nd, connecting rod.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model
Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but
As long as all protected in right of the present utility model by Patent Law.
Embodiment 1：A kind of Grouting Pipe for foundation engineering, as shown in figure 1, including outer Grouting Pipe 1, outer Grouting Pipe 1 is
Steel pipe is made, and steel pipe has outstanding hardness and toughness, so as to which outer Grouting Pipe 1 is hardly damaged in the environment of slip casting under ground,
Outer Grouting Pipe 1 is provided with multiple equally distributed outer injected holes 11, and the outer lateral wall of Grouting Pipe 1, which is provided with, prevents that sandstone enters in ground
Outer injected hole 11 and flexible first retaining piece 3, barrier is in outer injected hole 11 and slip casting under the normality of the first retaining piece 3
When the gap passed through for slurries is formed by pressure and the outer injected hole 11 of slurries.When Grouting Pipe is stretched into ground, by slip casting
Pipe is stretched into ground, and the first retaining piece 3 can effectively prevent the silt in ground from entering outer Grouting Pipe 1 by outer injected hole 11, and
Prevent from causing the blocking of external injected hole 11, the slip casting work of outer Grouting Pipe 1 has been effectively ensured.
The outer lower end of Grouting Pipe 1 is fixed with the casting head 12 in cone, and casting head 12 is integrally formed with being wrapped in outer slip casting
The connecting portion 13 of the lower end of pipe 1, connecting portion 13 protrude the first retaining piece 3 in outer Grouting Pipe 1 and outer Grouting Pipe 1.The note of cone
There is slurry first 12 importing to act on, and Grouting Pipe is more smoothly inserted into ground and carries out slip casting work；Connecting portion 13 protrudes outer Grouting Pipe 1
And first retaining piece 3, Grouting Pipe is reduced the outer body of Grouting Pipe 1 and the first retaining piece 3 and the soil in ground when inserting ground
The chance of body contact, so as to reduce the chance that sandstone enters outer Grouting Pipe 1.
Sliding is connected with interior Grouting Pipe 2 in outer Grouting Pipe 1, and interior Grouting Pipe 2 is made up of fiberglass pipe, and fiberglass pipe is resistance to
Corrosive nature is good, in light weight, intensity is high, and frictional resistance is small, and interior Grouting Pipe 2 is provided with multiple equally distributed interior injected holes 21, interior
Grouting Pipe 2 is provided with the second retaining piece 4 for preventing the sandstone into outer Grouting Pipe 1 from entering interior injected hole 21, second barrier
The barrier of part 4 is in the interior both sides of injected hole 21 and leaves the gap only passed through for slurries.When the situation for thering is silt to enter in outer Grouting Pipe 1
When, the second retaining piece 4 can effectively prevent the internal injected hole 21 of silt from resulting in blockage, and the Cementer of interior Grouting Pipe 2 has been effectively ensured
Make.
Stop grouting plug 22 and lower stop grouting plug 23 are fixed with interior Grouting Pipe 2, upper stop grouting plug 22 and lower stop grouting plug 23 abut simultaneously
Sliding is connected to the outer inwall of Grouting Pipe 1.Interior Grouting Pipe 2 can be slid by upper stop grouting plug and lower stop grouting plug in outer Grouting Pipe 1, together
When on stop grouting plug 22 and lower stop grouting plug 23 can effective barrier slurries, in slip casting, slurries control is stopped in upper stop grouting plug 22 with lower
Between slurry plug 23, slip casting position can be controlled by Grouting Pipe in sliding 2, make the slip casting of each fragment position in ground more equal
It is even.
The interior lower end of Grouting Pipe 2 is fixed with bottom 24, and bottom 24 is arranged at the lower lower section of stop grouting plug 23.Make slurries will not be from interior note
Slurry pipe 2 lower end enters directly into the outer bottom of Grouting Pipe 1, avoids slurries from existing beneficial to by slurries control in the outer bottom deposit of Grouting Pipe 1
Between upper stop grouting plug 22 and lower stop grouting plug 23, so as to beneficial to control slip casting position.
As shown in Fig. 2 the first retaining piece 3 includes two pieces of location-plates 31 being respectively welded in outer injected hole about 11, positioning
Barrier is fixed between plate 31 in the elastic sheet rubber 32 of outer injected hole 11, elastic sheet rubber 32 is in slip casting by the pressure of slurries
Produce outside deformation and form the gap passed through for slurries with outer injected hole 11.Elastic sheet rubber 32 has certain elasticity, often
Under state, elastic sheet rubber 32 is fixed on the position that lattice are blocked in outer injected hole 11 by two pieces of location-plates 31, and the sandstone in ground is difficult to
Outer Grouting Pipe 1 is entered by outer injected hole 11, so as to effectively avoid the blocking of the external injected hole 11 of sandstone；In slip casting, due to
Pressure increases in outer Grouting Pipe 1, and slurries outwards push up elastic sheet rubber 32, elastic sheet rubber 32 is produced deformation and to evagination
Go out, elastic sheet rubber 32 has certain gap with outer injected hole 11, and slurries are appeared in ground by gap, realize slip casting
Work.
Second retaining piece 4 includes two baffle plates 41 and between baffle plate 41 and the connecting rod that is fixed in interior Grouting Pipe 2
42, two baffle plates 41 are respectively arranged at the interior both sides of injected hole 21 and leave the gap only passed through for slurries with interior Grouting Pipe 2, are having
In the case that sandstone enters outer Grouting Pipe 1, the baffle plate 41 for being fixed on the both sides of interior injected hole 21 can be effectively in the entrance of barrier sandstone
Grouting Pipe 2, the particle of sandstone is larger, and slurries can pass through the gap between baffle plate 41 and interior Grouting Pipe 2, and sandstone is difficult to through gear
Gap between plate 41 and interior Grouting Pipe 2, it effectively prevent sandstone and enter in interior Grouting Pipe 2, effectively prevent sandstone and internally note
Starch the blocking in hole 21.
Operation principle：When Grouting Pipe is stretched into ground, elastic sheet rubber 32 is fixed on lattice and is blocked in by two pieces of location-plates 31
The position of outer injected hole 11, the sandstone in ground are difficult to enter outer Grouting Pipe 1 by outer injected hole 11, enter outer note when there is silt
When starching the situation in pipe 1, baffle plate 41 is fixed on the both sides of interior injected hole 21, and the gap between baffle plate 41 and interior Grouting Pipe 2 compared with
Small, the sandstone that effective barrier enters outer Grouting Pipe 1 enters interior Grouting Pipe 2, effectively prevent blocking up for the internal Grouting Pipe 2 of sandstone
Plug；When carrying out slip casting, the slurries in interior Grouting Pipe 2 enter outer Grouting Pipe 1 through the gap between baffle plate 41 and interior Grouting Pipe 2
Interior, elastic sheet rubber 32 produces deformation and outstanding under the pressure of slurries, forms what is passed through for slurries with outer injected hole 11
Gap, then slurries constantly note in ground, realize slip casting work.
Embodiment 2：A kind of Grouting Pipe for foundation engineering, difference from Example 1 are, as shown in figure 3, first
Retaining piece 3 includes two pieces of L-shaped bending plates 33, sliding is connected to the barrier piece 34 between two pieces of L-shaped bending plates and drives barrier piece
34 barriers are respectively welded in outer injected hole about 11 in two flat springs 35 of outer injected hole 11, two pieces of L-shaped bending plates 33, and spring is solid
Due between L-shaped bending plate 33 and barrier piece 34.Barrier piece 34 can slide between bending plate, under normality, in the work of spring 35
The barrier of barrier piece 34 is firmly descended to be difficult to enter outer Grouting Pipe 1 by outer injected hole 11 in the sandstone in outer injected hole 11, ground, from
And effectively avoid the blocking of the external injected hole 11 of sandstone；In slip casting, because pressure increases in outer Grouting Pipe 1, slurries are by barrier
Piece 34 outwards pushes up, and promotes the deformation of spring 35, and barrier piece 34 slides to away from the direction of outer injected hole 11, so as to barrier piece 34 and outside
Injected hole 11 has certain gap, and slurries are appeared in ground by gap, realizes slip casting work.
Claims (8)
1. a kind of Grouting Pipe for foundation engineering, including outer Grouting Pipe (1) and sliding are connected to the interior note in outer Grouting Pipe (1)
Slurry pipe (2), it is characterised in that the outer Grouting Pipe (1) is provided with multiple equally distributed outer injected holes (11), the outer Grouting Pipe
(1) lateral wall, which is provided with, prevents in ground that sandstone enters outer injected hole (11) and flexible first retaining piece (3), described first
Barrier is formed with outer injected hole (11) by the pressure of slurries when outer injected hole (11) and slip casting and supplies slurries under retaining piece (3) normality
The gap passed through, the interior Grouting Pipe (2) are provided with multiple equally distributed interior injected holes (21), and the interior Grouting Pipe (2) is provided with
Prevent into outer Grouting Pipe (1) sandstone enter interior injected hole (21) the second retaining piece (4), second retaining piece (4) every
It is blocked in interior injected hole (21) both sides and leaves the gap only passed through for slurries.
A kind of 2. Grouting Pipe for foundation engineering according to claim 1, it is characterised in that first retaining piece
(3) include being located at the location-plate (31) of outer injected hole (11) up and down, be fixed between the location-plate (31) under normality barrier in
The elastic sheet rubber (32) of outer injected hole (11), the elastic sheet rubber (32) are produced outwards in slip casting by the pressure of slurries
Deformation forms the gap passed through for slurries with outer injected hole (11).
A kind of 3. Grouting Pipe for foundation engineering according to claim 1, it is characterised in that first retaining piece
(3) include located at the upper and lower L-shaped bending plate (33) of outer injected hole (11), the sliding and barrier is in outer between L-shaped bending plate (33)
The barrier piece (34) of injected hole (11) and the spring (35) between L-shaped bending plate (33) and barrier piece (34).
A kind of 4. Grouting Pipe for foundation engineering according to claim 1, it is characterised in that second retaining piece
(4) include located at interior injected hole (21) both sides and with interior Grouting Pipe (2) leave the gap only passed through for slurries baffle plate (41) and
Between baffle plate (41) and the connecting rod (42) that is fixed in interior Grouting Pipe (2).
A kind of 5. Grouting Pipe for foundation engineering according to Claims 2 or 3, it is characterised in that the outer Grouting Pipe
(1) lower end is provided with the casting head (12) in cone, and the casting head (12) is provided with the connection for being wrapped in outer Grouting Pipe (1) lower end
Portion (13), the connecting portion (13) protrude the first retaining piece (3) in outer Grouting Pipe (1) and outer Grouting Pipe (1).
A kind of 6. Grouting Pipe for foundation engineering according to claim 1, it is characterised in that the interior Grouting Pipe (2)
On be fixed with stop grouting plug (22) and lower stop grouting plug (23), the upper stop grouting plug (22) and lower stop grouting plug (23) abuts and the company of sliding
It is connected to outer Grouting Pipe (1) inwall.
A kind of 7. Grouting Pipe for foundation engineering according to claim 6, it is characterised in that the interior Grouting Pipe (2)
Lower end is provided with bottom (24), and the bottom (24) is below lower stop grouting plug (23).
A kind of 8. Grouting Pipe for foundation engineering according to claim 1, it is characterised in that the outer Grouting Pipe (1)
For steel pipe, the interior Grouting Pipe (2) is fiberglass pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720507274.9U CN206902717U (en) | 2017-05-09 | 2017-05-09 | A kind of Grouting Pipe for foundation engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720507274.9U CN206902717U (en) | 2017-05-09 | 2017-05-09 | A kind of Grouting Pipe for foundation engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206902717U true CN206902717U (en) | 2018-01-19 |
Family
ID=61288639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720507274.9U Expired - Fee Related CN206902717U (en) | 2017-05-09 | 2017-05-09 | A kind of Grouting Pipe for foundation engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206902717U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130325A (en) * | 2019-05-22 | 2019-08-16 | 中信国安建工集团有限公司 | A kind of construction method of rock-boring perfusion |
| CN110318683A (en) * | 2018-03-29 | 2019-10-11 | 中国二十冶集团有限公司 | Cement mixing pile drill bit gunniting hole preventing clogging up device and its application method |
| CN111945703A (en) * | 2020-08-19 | 2020-11-17 | 福建省燕城建设工程有限公司 | Drainage structure for foundation stabilization and drainage method thereof |
-
2017
- 2017-05-09 CN CN201720507274.9U patent/CN206902717U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318683A (en) * | 2018-03-29 | 2019-10-11 | 中国二十冶集团有限公司 | Cement mixing pile drill bit gunniting hole preventing clogging up device and its application method |
| CN110130325A (en) * | 2019-05-22 | 2019-08-16 | 中信国安建工集团有限公司 | A kind of construction method of rock-boring perfusion |
| CN111945703A (en) * | 2020-08-19 | 2020-11-17 | 福建省燕城建设工程有限公司 | Drainage structure for foundation stabilization and drainage method thereof |
| CN111945703B (en) * | 2020-08-19 | 2021-10-19 | 福建省燕城建设工程有限公司 | Drainage structure for foundation stabilization and drainage method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180119 Termination date: 20210509 |