CN101725323B - Spiral drill - Google Patents
Spiral drill Download PDFInfo
- Publication number
- CN101725323B CN101725323B CN2009102420586A CN200910242058A CN101725323B CN 101725323 B CN101725323 B CN 101725323B CN 2009102420586 A CN2009102420586 A CN 2009102420586A CN 200910242058 A CN200910242058 A CN 200910242058A CN 101725323 B CN101725323 B CN 101725323B
- Authority
- CN
- China
- Prior art keywords
- screw rod
- main shaft
- augers
- ribs
- fixedly connected
- 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.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims description 15
- 238000009826 distribution Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000002689 soil Substances 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 229910002059 quaternary alloy Inorganic materials 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The invention relates to a spiral drill for drilling, comprising a main shaft, a plurality of reinforcing ribs, an upper spiral rod, a lower spiral rod, a plurality of vertically-distributed reinforced steel bars, a plurality of transversely-distributed reinforced steel bars and a toothed plowshare, wherein one end of each reinforcing rib is fixed on the main shaft, obliquely extends downwards in a specified angle with the main shaft by an outwards splitting way and is also fixedly connected with the upper spiral rod and the lower spiral rod; the upper spiral rod and the lower spiral rod respectively have a spiral shape formed by spirally extending along the outer surface of a cylindrical body and a specified length; the plurality of vertically-distributed reinforced steel bars are vertically distributed in a specified space and fixedly connected between the upper spiral rod and the lower spiral rod; the plurality of transversely-distributed reinforced steel bars are radically arranged between the lower spiral rod and the main shaft; and the toothed plowshare is fixedly arranged on a wear-resisting steel plate between one end at the lower side of the lower spiral rod and the main shaft and arranged along the length direction of the wear-resisting steel plate. In the drilling, a boulder can be stored, therefore, the phenomena of drill blocking, damage, and the like can be well prevented.
Description
Technical field
The present invention relates to a kind of drill bit, outstanding reference and the augers that in the clean-out machine or the rig that circles round, uses.
Background technology
Development along with highrise building, highway, railway, bridges and culverts engineering; Construction requirement to Foundation Design is also increasingly high; Consider the load and the engineering geology situation of building, the construction of major part engineering pile foundation at present will be passed bad grounds such as Quaternary system soil layer, boulder bed, and the bearing stratum of pile foundation is designed on matrix rock; So that the raising bearing capacity of single pile, this also has higher requirement to pile foundation construction simultaneously.
In pile foundation construction, bored pile is a kind of foundation structure form that generally adopts in the constructions such as harbour, high-grade highway bridge, when construction, utilizes the drill bit of rig to carry out the drilling well driving; Usually this drill bit is welded by steel pipe, steel plate or reinforcing bar, and its operating principle is, rig reaches drill bit through drilling rod with rotary power, and drill bit under water is in rotary course; Cut earth and it is stirred into mud, along with the continuous injection of water and the continuous entering of drill bit, mud is held out wellhole; Be thrown in the mud pit, very fast water and soil segregation, earth is deposited at the bottom of the pond; Elutriation goes out, and is injected into wellhole once more, forms new mud; Be discharged into mud pit once more, circulation finally forms wellhole according to this.Reach projected depth, after the mud well was qualified, mounting reinforcing steel bars skeleton, concrete perfusion formed pile foundation.
But in the practice of construction process, in the process of rig boring, run into landform such as boulder or boulder bed through regular meeting, because boulder or cobble can roll in company with drill bit together; And then causing rig effectively to creep into, phenomenons such as bit freezing, damage drill bit very easily appear, at this moment; General method is to remove rig immediately, uses percussive drill instead and perhaps towards grabbing rig boulder is smashed or grabs out, thereby get rid of cobble, boulder; But this method recruitment is many, length consuming time because to former clean-out machine or circle round rig pore-forming around soil layer not compacted; Grab rig and cause the hole of collapsing easily if directly use percussive drill instead or dash, especially darker bored pile is all the more so, and common way is original native hole to be filled up clay impacts again so that soil layer and the retaining wall around the compacted hole wall; And clear hole overlong time behind the pore-forming, often cleaning is unclean, promptly difficult clear hole; Therefore, need improve, so that can when creeping into, can take out boulder to existing drill bit.
Summary of the invention
The present invention makes in order to solve the problems of the technologies described above, and its purpose is to provide a kind of can take out the augers of boulder when creeping into.
In order to realize the foregoing invention purpose, a kind of augers that the present invention relates to, main shaft, one of which end are provided with the drilling rod flange connecting dish that is used for rig; A plurality of ribs, one of which end are fixed on the outer wall periphery near flange one side of main shaft, and become with said main shaft that predetermined angular ground is outwards oblique in sunder to be extended below, and also are fixedly connected with screw rod on it; Last screw rod and following screw rod; Have along cylinder external surface spiral and extend and the spiral-shaped and specific length of formation; The said screw rod of going up is fixedly connected on a plurality of ribs, and screw rod and following screw rod are across predetermined distance and be separately positioned on upper and lower accordingly this on; A plurality of vertical distribution reinforcements vertically distribute and are fixedly connected at said going up between screw rod and the following screw rod with prescribed distance; A plurality of transversely distributed steelbars are arranged between said screw rod down and the said main shaft radially, and an end of these transversely distributed steelbars is fixedly connected on the said screw rod down, and its other end is fixed on the said main shaft; And the dentation colter, be fixedly installed to be located at said down screw rod on an end and the wear-resisting steel plate between the said main shaft of downside, and along the length direction setting of said wear-resisting steel plate.
After adopting this kind design, because indented bars and flight one constitute spiral helicine groove bucket, in the process of creeping into, along with the rotary drilling of drill bit; The boulder or the cobble at the boring end are broken by augers, and simultaneously, boulder that it is broken or cobble can get into along with rotation in this helicla flute bucket, because the groove bucket shape becomes a Chu Shi storehouse; Boulder or cobble can not roll along with the rotation of drill bit, and therefore, drill bit can effectively creep into; Then, drill bit proposed the mud face after, promptly can easily take out boulder or cobble; Continue the sinking drilling rod, fish for the bulk boulder repeatedly, just can big boulder be removed clean.
In addition,, also can be that when said upward screw rod was projected to a plane respectively with following screw rod 5, the projection section of this upper and lower screw rod should form 3/4 circumference as a kind of improvement.
In addition,, also can be that this dentation colter is with respect to being obliquely installed to oblique below through said wear-resisting steel plate and perpendicular to the inclination angle with 30 °, the plane of said main shaft as a kind of improvement.
In addition, as a kind of improvement, also can be; In said a plurality of ribs each ribs be shaped as trapezoidal; Include brace portion, the vertical stretch that vertically extends, this vertical stretch bending extends to the horizontal-extending portion of main shaft certainly, wherein, the length of this vertical stretch is equivalent to said interval of going up between screw rod and the following screw rod; And the two ends of this trapezoidal ribs are fixedly connected on the upper and lower side of main shaft respectively.
Because trapezoidal ribs is bearing capacity better, therefore, can better strengthen the rigidity of whole drill bit, thereby drill bit is more effectively crept into.
In addition,, also can be, to be installed with the vertical tooth plate of U-shaped at the other end that is not provided with flange of said main shaft as a kind of improvement.
In addition,, also can be that said upward screw rod, following screw rod, transversely distributed steelbar, vertical distribution reinforcement, the vertical stretch of trapezoidal ribs, the one or more members in the horizontal-extending portion are made up of screw-thread steel as a kind of improvement.
In addition,, also can be between said main shaft and said following screw rod, to be provided with the many reinforcement screw rods that said a plurality of transversely distributed steelbars are fixedly connected as a kind of improvement.
Because the multi-circle spiral flow distribution reinforcement can make augers bear bigger weight, simultaneously; Increase the rigidity of drill bit; In addition, because this flight is made up of spiral reinforcement and distribution reinforcement, the space between the reinforcing bar is boulder or cobble fully fixedly; And then can prevent that in drilling process boulder or cobble come off, and then can prevent that drill bit is filled with when upwards carrying behind the stone and come off.
After employing should design, when running into boulder, cobble, along with creeping into of this augers; The cobble of big particle diameter is threaded in the helicla flute bucket, fishes for the bulk boulder repeatedly, just can big boulder be removed clean; Effect obviously improves, and has saved construction cost, has obtained better technical effect.
Description of drawings
Fig. 1 is the sketch map of the concrete structure of the augers that relates to of the expression first embodiment of the present invention.
Fig. 2 is the sketch map of the concrete structure of the augers that relates to of the expression second embodiment of the present invention.
The specific embodiment
Below, in conjunction with the accompanying drawing further explain specific embodiment of the present invention.
Fig. 1 is the concrete structure sketch map of the augers that relates to of the expression first embodiment of the present invention.As shown in the drawing, augers of the present invention comprises: main shaft 102, and it can constitute with steel pipe, and the one of which end is provided with the drilling rod flange connecting dish 101 that is used for rig, at the other end the vertical tooth plate of U-shaped can be installed; A plurality of ribs 103,103 ', 103 " ...; these a plurality of ribs 103,103 ', 103 " ... an end be fixed on the outer wall periphery near flange 101 1 sides of main shaft 102; Outwards oblique in sunder the extending below in 102 one-tenth predetermined angular ground of these a plurality of ribs and main shaft, screw rod 104 on its other end is fixedly connected with respectively; Last screw rod 104 and following screw rod 105; Have along cylinder external surface spiral and extend and the spiral-shaped and specific length of formation; The said screw rod 104 of going up is fixedly connected at a plurality of ribs 103,103 ', 103 " ... an end; screw rod 104 and following screw rod 105 are across predetermined distance and be separately positioned on upper and lower accordingly this on; and, on this between screw rod 104 and the following screw rod 105 through with prescribed distance (for example 100mm) vertically a plurality of vertical distribution reinforcement 111 of distributed and arranged interconnect.And when said upward screw rod 104 was projected to a plane respectively with following screw rod 105, the projection section of this upper and lower screw rod should form 3/4 circumference, and promptly the shape of upper and lower screw rod should be the spirality with 3/4 week.
And; Be provided with a plurality of transversely distributed steelbars 107 between this time screw rod 105 and the main shaft 102 radially; One end of these transversely distributed steelbars 107 is fixedly connected on the said screw rod 105 down; Its other end is fixed on the main shaft 102, and, preferably these transversely distributed steelbars 107 that direction is set is vertical with main shaft 102.
Between main shaft 102 and following screw rod 105, can also be provided with and said a plurality of transversely distributed steelbars 107 are fixedly connected many of getting up strengthen screw rods 106, this shape of strengthening screw rod 106 is corresponding with following screw rod 105.
In addition; Between an end and main shaft 102 at downside of following screw rod 105; Be installed with the wear-resisting steel plate vertical 112 with main shaft; On said wear-resisting steel plate 112, alongst be installed with dentation colter 110, this dentation colter 110 is with respect to being obliquely installed to oblique below through wear-resisting steel plate 112 and perpendicular to the inclination angle with 30 °, the plane of main shaft 102, thereby utilizes this dentation colter 110 to carry out bore operation.
In addition, for keep not being provided with dentation colter 110, go up the screw rod 104 and the other end firm of screw rod 105 down, utilize some horizontal fixed bars 108 will go up screw rod 104 and down the said other end of screw rod 105 be fixedly attached on the main shaft 102.Thereby horizontal fixed bar 108, last threaded rod 104 and following threaded rod 105, transversely distributed steelbar 107 and vertical distribution reinforcement 111 constitute spiral helicine helicla flute bucket.
According to said structure, because horizontal fixed bar, last threaded rod and following threaded rod, transversely distributed steelbar and vertical distribution reinforcement have constituted the helicla flute bucket, therefore; In the process of creeping into, along with the rotary drilling of drill bit, the boulder at the boring end or cobble can be broken by augers; Simultaneously; Boulder that it is broken or cobble can get into along with rotation in this helicla flute bucket, and it can not roll along with the rotation of drill bit.
In addition, strengthen screw rod 106, can make augers bear bigger weight, and then increase the intensity of drill bit owing to can also be provided with many.In addition; Space between reinforcement screw rod and the transversely distributed steelbar is boulder or cobble fully fixedly; And then can prevent that in drilling process boulder or cobble come off; Also can prevent simultaneously to be filled with in the augers coming off when upwards mentioning behind the stone, augers can creep into effectively.Afterwards, augers proposed the mud face after, promptly can easily take out boulder or cobble, continue the sinking drilling rod, fish for the bulk boulder repeatedly, so just can be totally with big boulder removing, efficiency of construction obviously improves, and provides cost savings.
Below, the concrete structure of the augers that the second embodiment of the present invention relates to is described with reference to Fig. 2.As shown in Figure 2; Compare with first embodiment; The distinctive points of the augers that second embodiment relates to is; Its ribs 103,103 ', 103 " ... be shaped as approximate trapezoid, promptly ribs 103,103 ', 103 " ... Except brace portion 301, also have vertically the vertical stretch 302 that extends and certainly these vertical stretch 302 bendings extend to the horizontal-extending portion 303 of main shaft 102; Wherein, the length of this vertical stretch 302 is equivalent to the interval between screw rod 104 and the following screw rod 105.At this; This trapezoidal ribs 103,103 ', 103 " ... two ends be fixedly connected on the upper and lower side of main shaft 102 respectively; and its rugosity is greater than transversely distributed steelbar and vertical distribution reinforcement, therefore; the augers with this trapezoidal ribs can bear bigger load and pressure, and its intensity is further strengthened.
In addition, in the augers of the present invention, upper and lower screw rod 104,105, transversely distributed steelbar 107, vertical distribution reinforcement 111, the one or more members in the vertical stretch 302 of trapezoidal ribs, the horizontal-extending portion 303 etc. can be made up of screw-thread steel.Through adopting screw-thread steel, jut that can be through screw-thread steel is fixed bit boulder or cobble more effectively.
Moreover in the augers of the present invention, the fixed connection between each member can be adopted welding manner, can also adopt mode such as be threaded.
It should be noted that under above-mentioned instruction of the present invention those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description; And these improvement and distortion; Simple change etc. do not influence the enforcement of the invention yet, all drop in protection scope of the present invention, and those skilled in the art should be understood that; Above-mentioned specific descriptions are just better explained the object of the invention, and protection scope of the present invention is limited claim and equivalent thereof.
Claims (7)
1. an augers is characterized in that, comprising:
Main shaft, one of which end are provided with the drilling rod flange connecting dish that is used for rig;
A plurality of ribs, one of which end are fixed on the outer wall periphery near flange one side of main shaft, and become with said main shaft that predetermined angular ground is outwards oblique in sunder to be extended below, and also are fixedly connected with screw rod on it;
Last screw rod and following screw rod; Have along cylinder external surface spiral and extend and the spiral-shaped and specific length of formation; The said screw rod of going up is fixedly connected on a plurality of ribs, and screw rod and following screw rod are across predetermined distance and be separately positioned on upper and lower accordingly this on;
A plurality of vertical distribution reinforcements vertically distribute and are fixedly connected at said going up between screw rod and the following screw rod with prescribed distance;
A plurality of transversely distributed steelbars are arranged between said screw rod down and the said main shaft radially, and an end of these transversely distributed steelbars is fixedly connected on the said screw rod down, and its other end is fixed on the said main shaft; And
The dentation colter, be fixedly installed to be located at said down screw rod on an end and the wear-resisting steel plate between the said main shaft of downside, and along the length direction setting of said wear-resisting steel plate.
2. augers as claimed in claim 1 is characterized in that,
When said upward screw rod was projected to a plane respectively with following screw rod, the projection section of this upper and lower screw rod should form 3/4 circumference.
3. augers as claimed in claim 1 is characterized in that,
This dentation colter is with respect to being obliquely installed to oblique below through said wear-resisting steel plate and perpendicular to the inclination angle with 30 °, the plane of said main shaft.
4. augers as claimed in claim 1 is characterized in that,
The structure of a plurality of ribs is replaced with following structure: in a plurality of ribs each ribs be shaped as trapezoidal; Include brace portion, the vertical stretch that vertically extends, this vertical stretch bending extends to the horizontal-extending portion of main shaft certainly; Wherein, The length of this vertical stretch is equivalent to said interval of going up between screw rod and the following screw rod, and the two ends of this trapezoidal ribs are fixedly connected on the upper and lower side of main shaft respectively.
5. augers as claimed in claim 1 is characterized in that,
At the other end that is not provided with flange of said main shaft, be installed with the vertical tooth plate of U-shaped.
6. augers as claimed in claim 4 is characterized in that,
Said upward screw rod, following screw rod, transversely distributed steelbar, vertical distribution reinforcement, the vertical stretch of trapezoidal ribs, the one or more members in the horizontal-extending portion are made up of screw-thread steel.
7. augers as claimed in claim 1 is characterized in that,
Between said main shaft and said following screw rod, be provided with the many reinforcement screw rods that said a plurality of transversely distributed steelbars are fixedly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102420586A CN101725323B (en) | 2009-12-03 | 2009-12-03 | Spiral drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102420586A CN101725323B (en) | 2009-12-03 | 2009-12-03 | Spiral drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101725323A CN101725323A (en) | 2010-06-09 |
| CN101725323B true CN101725323B (en) | 2012-05-09 |
Family
ID=42446805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102420586A Expired - Fee Related CN101725323B (en) | 2009-12-03 | 2009-12-03 | Spiral drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101725323B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798528B (en) * | 2018-08-01 | 2023-10-20 | 中地君豪高科股份有限公司 | Drill bit for breaking waste pipe piles and method for breaking waste pipe piles and filling new piles |
| CN113482608B (en) * | 2021-07-13 | 2023-08-18 | 陕西华山路桥集团有限公司 | Soil sampling method for ramming pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4266830A (en) * | 1977-07-21 | 1981-05-12 | The United States Of America As Represented By The Secretary Of The Interior | Auger construction providing reduced noise |
| US5722498A (en) * | 1993-10-28 | 1998-03-03 | Hareninvest | Soil displacement auger head for installing piles in the soil |
| CN2769486Y (en) * | 2004-11-26 | 2006-04-05 | 中国地质科学院勘探技术研究所 | Screw auger |
| CN201024891Y (en) * | 2007-04-13 | 2008-02-20 | 中国京冶工程技术有限公司 | Long spiral replaced and compacted driller |
-
2009
- 2009-12-03 CN CN2009102420586A patent/CN101725323B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4266830A (en) * | 1977-07-21 | 1981-05-12 | The United States Of America As Represented By The Secretary Of The Interior | Auger construction providing reduced noise |
| US5722498A (en) * | 1993-10-28 | 1998-03-03 | Hareninvest | Soil displacement auger head for installing piles in the soil |
| CN2769486Y (en) * | 2004-11-26 | 2006-04-05 | 中国地质科学院勘探技术研究所 | Screw auger |
| CN201024891Y (en) * | 2007-04-13 | 2008-02-20 | 中国京冶工程技术有限公司 | Long spiral replaced and compacted driller |
Non-Patent Citations (1)
| Title |
|---|
| JP平7-189248A 1995.07.28 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101725323A (en) | 2010-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202337976U (en) | In-hole impact high-pressure jet grouting equipment | |
| KR101014796B1 (en) | Top-down underground construction method using prefabricated concrete column member as temporary bridge column | |
| CN102505684B (en) | Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof | |
| CN103233469B (en) | Revolve enlarging pile construction technique, equipment and enter sizing device | |
| CN108193642B (en) | Revetment reinforcing facility and construction method thereof | |
| CN103526770A (en) | High-impermeable anti-floating pile raft structure and construction method | |
| CN103669365A (en) | External diagonal-pulling and internal diagonal-bracing herringbone foundation pit supporting pile and construction method thereof | |
| CN101255691B (en) | Construction method for complete casing tube thin wall filling pile and movable internal mold | |
| JPWO2004035942A1 (en) | Pile digging method, foundation pile structure | |
| CN110735432A (en) | Method for clearing pile foundation and controlling parameters in shield tunneling machine over-invasion limit tunnel range | |
| CN113737780A (en) | Underwater rock-socketed concrete pile and construction method thereof | |
| JP2010255237A (en) | Method and structure for tunnel reinforcement | |
| CN108978643A (en) | Supporting pile construction method, reinforcement cage structure and supporting pile structure | |
| CN203594041U (en) | Piled raft structure with good resistance to seepage and buoyancy | |
| CN101725323B (en) | Spiral drill | |
| JP4705506B2 (en) | Rotary press-fit steel pipe pile and press-fit method using steel pipe pile | |
| CN104074197A (en) | Large-diameter thin-walled tubular pile composite anchor rod type foundation pit support structure and construction method thereof | |
| CN210856971U (en) | Pile foundation erodees reinforced structure | |
| CN109989346B (en) | Bridge large-diameter precast concrete tubular column foundation and construction method thereof | |
| CN109610494B (en) | Rock-socketed construction process for large-diameter pile foundation | |
| JP6832101B2 (en) | Reinforcement structure of embankment and reinforcement method of embankment | |
| KR101131951B1 (en) | Synthetic pile manufacture and construction method | |
| CN209584855U (en) | Bridge major diameter precast concrete tubular column basis | |
| CN100485132C (en) | Formative method for row-pile style water-proof wall underground | |
| CN210216473U (en) | Anti-slide pile for slope treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 100085, Beijing, Beijing economic and Technological Development Zone, Kangding street, No. 1, 2, six or seven, Daxing District Patentee after: MCC COMMUNICATION CONSTRUCTION GROUP Co.,Ltd. Address before: 100176, Beijing economic and Technological Development Zone, Kangding street, No. 1, 2, six, seven Patentee before: MCC COMMUNICATION ENGINEERING TECHNOLOGY Co.,Ltd. |
|
| 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: 20120509 |