CN216586501U - Long auger drilling pressure-grouting pile device with distance measuring function - Google Patents
Long auger drilling pressure-grouting pile device with distance measuring function Download PDFInfo
- Publication number
- CN216586501U CN216586501U CN202122973930.3U CN202122973930U CN216586501U CN 216586501 U CN216586501 U CN 216586501U CN 202122973930 U CN202122973930 U CN 202122973930U CN 216586501 U CN216586501 U CN 216586501U
- Authority
- CN
- China
- Prior art keywords
- distance measuring
- distance
- long auger
- hole
- drilling pressure
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 32
- 230000002262 irrigation Effects 0.000 claims abstract description 3
- 238000003973 irrigation Methods 0.000 claims abstract description 3
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000013139 quantization Methods 0.000 abstract description 2
- 239000002689 soil Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 238000011155 quantitative monitoring Methods 0.000 description 4
- 230000000981 bystander Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model provides a long spiral drilling and pressure filling pile device with a distance measuring function, which comprises a long spiral drill rod and a drill bit arranged at the bottom of the long spiral drill rod, wherein the long spiral drill rod comprises a core pipe with a hollow inner part and spiral blades fixed on the outer surface of the core pipe; wherein, after the through-hole was taken out to the breakover pole, distance measuring device measured distance between distance measuring device and the concrete column that irritates the stake device and pour into through a plurality of through-holes to realize the quantization, intelligent distance between measuring device and the concrete face, guarantee the quality of long auger drilling pressure irrigation stake.
Description
Technical Field
The utility model relates to the technical field of pile foundation construction, in particular to a long spiral drilling pile grouting device with a distance measuring function.
Background
The long spiral drilling pressure filling pile is a new pile forming process developed in recent years, and has the characteristics of low construction noise, no slurry pollution, high pile forming speed, difficulty in hole collapse and the like, so that the long spiral drilling pressure filling pile is gradually and widely applied in recent years. The process comprises the steps of firstly completing drilling by using a long spiral drilling machine, then pumping concrete into a hole through a channel in the center of a drill rod by using a concrete delivery pump at a certain pressure while lifting the drill rod, and filling the hole with the concrete when the drill rod is completely lifted. At this moment, the integrally manufactured steel reinforcement cage is transferred to a construction site, the vibrating rod penetrates into the steel reinforcement cage, then the steel reinforcement cage and the vibrating rod are lifted simultaneously, the self gravity of the steel reinforcement cage is firstly utilized to be put into concrete, the vibrating rod is opened after the steel reinforcement cage cannot be continuously put into the concrete under the action of gravity, and the steel reinforcement cage is vibrated and pressed to a designed elevation, so that the construction of the pressure grouting pile is completed.
The traditional long spiral drilling pressure-grouting pile construction method has the following defects: when the drill bit was bored, drilled out downthehole most soil body, still had a small amount of incomplete soil disintegrating slag to be saved at the bottom of the hole for pile foundation bearing capacity is not enough, can appear disconnected stake even, is out of its reason, mainly because concrete feeding does not match with drilling rod hoisting speed, when leading to a large amount of soil bodies to get into its concrete on the blade. Due to long-time pipe blocking, concrete in the hole is not solidified or the connection of subsequent pouring concrete is not good, and therefore faults of the concrete are generated. Meanwhile, the hole is easy to be crossed with the adjacent pile, and soil enters the concrete to cause the pile to be broken.
The existing solution is to adjust the delivery capacity of the concrete pump to match the lifting speed of the drill rod, ensure that the corresponding drill rod is buried in the concrete, stop lifting the drill rod sometimes, and lift the drill rod after the concrete surface reaches a certain position. In the prior art, a commander of a front desk judges the concrete surface through the sound generated when the bystander makes a fall in a drill rod near the drill rod, the position of the bystander promotes the command of the drill rod, and the bystander depends on experience to have deviation, so that the real-time quantitative processing cannot be realized.
In view of the above, it is necessary to provide a long auger drilling pressure-grouting pile device with distance measurement function to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a long spiral drilling pressure filling pile device with a distance measuring function, and aims to solve the problems that in the existing long spiral drilling pressure filling pile construction process, a commander judges and judges a concrete surface by sound, so that deviation exists and real-time quantitative processing cannot be realized.
In order to achieve the purpose, the utility model provides a long auger drilling pressure filling pile device with a distance measuring function, which comprises a long auger stem and a drill bit arranged at the bottom of the long auger stem, wherein the long auger stem comprises a core pipe with a hollow inner part and a helical blade fixed on the outer surface of the core pipe, and the top of the core pipe is communicated with a concrete pump pipeline; the guide rod is arranged in parallel with the core pipe at intervals; wherein,
the spiral blade is provided with a plurality of through holes which are distributed along the axial direction of the core tube from top to bottom, the guide rod sequentially penetrates through the through holes from top to bottom and is slidably arranged with the inner wall of the through holes, and a preset spacing distance is reserved between the axial line of the through holes and the axial line of the core tube;
a guniting nozzle is arranged on one side of the side wall of the drill bit, which is far away from the conducting rod, and the guniting nozzle is communicated with the inside of the core pipe;
the pile grouting device also comprises a distance measuring device which is arranged corresponding to the through hole;
after the through hole is drawn out of the through rod, the distance measuring device measures the distance between the distance measuring device and the concrete column poured by the pile pouring device through the through holes.
Preferably, the distance measuring device is fixed to a bottom surface of the uppermost helical blade.
Preferably, the maximum outer diameter of the drill bit is less than the preset spacing distance.
Preferably, the preset spacing distance is set between 200 and 240 mm.
Preferably, the shape of through-hole is circular, the conducting rod is cylindric, the diameter setting of through-hole is between 10 ~ 20 mm.
Preferably, the distance measuring device comprises a control device and a distance measuring sensor in communication connection with the control device, wherein the distance measuring sensor comprises one or more of a laser distance measuring sensor and an infrared distance measuring sensor.
Preferably, a flange connected with the concrete transmission mechanism is formed at the top of the core pipe, and the outer diameter of the flange is smaller than the preset spacing distance.
Preferably, the distance between the through hole and the edge of the spiral blade is set to be 10-25 mm.
Preferably, the helical blade is fixedly connected to the outer wall of the core tube by welding.
Compared with the prior art, the long spiral drilling and pressure filling pile device with the distance measuring function has the following beneficial effects:
the utility model provides a long spiral drilling and pressure filling pile device with a distance measuring function, which is characterized in that a conducting rod parallel to and spaced from a core pipe is arranged, a plurality of through holes distributed along the axis direction of the core pipe are formed in a spiral blade from top to bottom, the conducting rod sequentially penetrates through the through holes from top to bottom and is slidably arranged with the inner walls of the through holes, a preset spacing distance is formed between the axis of the through holes and the axis of the core pipe, and meanwhile, a distance measuring device corresponding to the through holes is arranged on the spiral blade, so that no obstacle is arranged at the through holes, and the distance measuring device can conveniently measure the concrete surface through the through holes. Simultaneously, with the whitewashing mouth setting keep away from one side of conduction pole, the influence of the concrete jet when can furthest reducing the pouring concrete to range unit to improve the reliability of quantitative monitoring. In addition, be fixed in the distance measuring device and can avoid the influence of barriers such as soil body or ground on the bottom surface of helical blade of the top to the at utmost, and then realize the distance between quantization, the intelligent measurement distance measuring device and the concrete face, guarantee the quality of long auger drilling pressure irrigation stake.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the system shown in the drawings without creative efforts.
FIG. 1 is an overall schematic view of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A in one embodiment of the present invention;
fig. 3 is an overall view from another perspective in an embodiment of the present invention.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
The reference numbers illustrate:
a long auger stem 100; a drill bit 110; a core tube 120; a helical blade 130; a through hole 131; a lead-through rod 140; a guniting nozzle 150; a flange 160.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
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.
It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions relating to "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 to 3, the long auger drilling and pile grouting device with a distance measuring function according to an embodiment of the present invention includes a long auger stem 100 and a drill bit 110 disposed at the bottom of the long auger stem 100, wherein the long auger stem 100 includes a hollow core tube 120 and a helical blade 130 fixed on an outer surface of the core tube 120, a top of the core tube 120 is communicated with a concrete pump pipeline (not shown), and further includes conducting rods 140 disposed in parallel to the core tube 120 at intervals, wherein the core tube 120 is used for pouring concrete, so as to integrate drilling and pouring concrete.
The helical blade 130 is provided with a plurality of through holes 131 arranged along the axial direction of the core tube 120 from top to bottom, the conducting rod 140 sequentially penetrates through the through holes 131 from top to bottom and is slidably arranged with the inner wall of the through holes 131, and a preset spacing distance is reserved between the axial line of the through holes 131 and the axial line of the core tube 120.
It is noted that a plurality of through holes 131 are formed on the helical blade 130 from top to bottom, so that through hole 131 rows in the same vertical direction are formed in the space of the helical blade 130, and the distance measuring device can perform intelligent and automatic distance measurement and detection conveniently. The conducting rod 140 is used for conducting obstacles such as mud, rock soil and the like at the position of the through hole 131 of the helical blade 130, and the obstacles at the position of the through hole 131 can be effectively cleared away by arranging the conducting rod 140 and the inner wall of the through hole 131 in a slidable manner. In addition, a preset spacing distance is reserved between the axis of the through hole 131 and the axis of the core tube 120, so that the distance measuring device can monitor the concrete surface in the hole to the maximum extent.
A guniting nozzle 150 is arranged on one side of the side wall of the drill bit 110, which is far away from the through rod 140, the guniting nozzle 150 is communicated with the inside of the core tube 120, and the pile grouting device further comprises a distance measuring device (not shown) which is arranged corresponding to the through hole 131; wherein, after the through-hole 131 is drawn out by the through-rod 140, the distance measuring device measures the distance between the distance measuring device and the concrete column poured by the pile pouring device through a plurality of through-holes 131. The guniting nozzle 150 is arranged on one side far away from the conducting rod 140, so that the influence of a concrete jet flow on the distance measuring device during concrete pouring can be reduced to the greatest extent, and the reliability of quantitative monitoring is improved. In addition, range unit with the through-hole 131 corresponds the setting, for example, range unit includes laser sensor, laser sensor is close to in the through-hole 131 sets up, guarantees that laser sensor normal during operation, the laser beam can normally be accomplished through a plurality of through-holes 131 and concrete surface between the distance measurement.
It should be understood by those skilled in the art that, in order to match the conveying capacity of the concrete pump with the lifting speed of the drill rod and realize the purpose of quantitative monitoring control, the distance measuring device is adopted in the present application to monitor the distance between the concrete column in the hole bottom and the distance measuring device in real time or according to the preset frequency, namely, the distance measuring device passes through the through hole 131, the distance between the distance measuring device and the concrete column in the hole can be measured in real time or according to the preset frequency, and by introducing a control system (not shown in the figure), the interval between the concrete column and the distance measuring device is controlled in the preset range through the control system, the conveying capacity of the concrete pump is matched with the lifting speed of the drill rod, so that quantitative monitoring management is realized, the traditional way of relying on side listening is overcome, and the reliability of long auger drilling pressure grouting pile is greatly improved.
The working process comprises the following steps: in the initial state, the conducting rod 140 is lifted to the position of the uppermost helical blade 130 by a concrete lifting mechanism (not shown) or manually, after the drilling process is completed and before the concrete is ready to be poured, the conducting rod 140 is lifted back and forth twice along the through hole 131 in the same vertical direction by the concrete lifting mechanism to ensure that no obstacle exists at the through hole 131, and then the conducting rod 140 is lifted to a preset position, for example, the position may be on the helical blade 130 above the distance measuring device, and the specific position of the distance measuring device in the vertical direction may be set according to actual needs. At this time, the distance measuring device is started again, the poured concrete is arranged, the concrete flows to the bottom of the hole through the core pipe 120 and the guniting nozzle 150, the distance between the distance measuring device and the concrete surface can be obtained in real time through the distance measuring device or according to the preset monitoring frequency, and therefore the purpose of quantitative processing is achieved.
In a preferred embodiment of the present invention, the distance measuring device is fixed to the bottom surface of the uppermost helical blade 130. In order to reduce the influence of obstacles such as mud, rock and soil on the distance measuring device as much as possible, the distance measuring device in this embodiment is fixed to the bottom surface of the uppermost helical blade 130, and normally, the obstacles on the helical blade 130 are lifted to the middle of the long auger stem 100 and then substantially all or most of the obstacles fall down on the ground, so that the distance measuring device is fixed to the bottom surface of the uppermost helical blade 130, and the influence of obstacles such as soil or rock and soil can be avoided to the greatest extent.
In a preferred embodiment of the present invention, the maximum outer diameter of the drill bit 110 is smaller than the predetermined distance. It should be noted that, setting the maximum outer diameter of the drill bit 110 to be smaller than the preset spacing distance can ensure that there is a sufficient distance between the through hole 131 and the drill bit 110, so that the distance measuring device can directly measure the spacing between the distance measuring device and the concrete column, and the conveying capacity of the concrete pump and the lifting speed of the drill rod are adjusted by the control system to match. Avoid because of drill bit 110 when drilling, drill out downthehole most soil body, still have a small amount of incomplete soil detritus to remain at the bottom of the hole for the pile foundation bearing capacity is not enough, can appear the problem of disconnected stake even.
Further, the preset spacing distance is set between 200 mm and 240 mm. The specific value of the preset separation distance can be set according to actual needs.
Further, the shape of the through hole 131 is circular, the conducting rod 140 is cylindrical, and the diameter of the through hole 131 is set between 10 mm and 20 mm. It should be noted that the circular hole matches the shape of the through rod 140, and it is understood that in other embodiments, the shapes and diameters of the through hole 131 and the through rod 140 can be set according to actual requirements.
Further, the distance measuring device comprises a control device and a distance measuring sensor in communication connection with the control device, wherein the distance measuring sensor comprises one or more of a laser distance measuring sensor and an infrared distance measuring sensor. For example, the laser distance measuring sensor is adopted, the environment adaptation capability is strong, the detection precision is higher, the laser sensor is in communication connection with the control system, the control device can process and send distance data collected by the laser sensor, the control device controls the concrete pumping quantity and the lifting speed of the long auger stem 100, and intelligent and automatic control can be achieved.
In a preferred embodiment of the present invention, a flange 160 connected to a concrete driving mechanism is formed on the top of the core tube 120, and the outer diameter of the flange 160 is smaller than the predetermined distance. By providing the flange 160, the core tube 120 can be detachably connected to an external concrete driving mechanism.
Further, the distance between the through hole 131 and the edge of the helical blade 130 is set to be 10-25 mm. It should be noted that the specific value of the distance from the through hole 131 to the edge of the helical blade 130 can be flexibly set according to the requirement, but the working strength of the helical blade 130 needs to be ensured, and the distance cannot be set too small or too large.
Further, the spiral vane 130 is fixedly coupled to the outer wall of the core tube 120 by welding. It will be appreciated that in other embodiments, the fixed connection between the helical blade 130 and the outer wall of the core tube 120 may be in other manners, for example, the helical blade 130 and the core tube 120 may be integrally formed.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent systems or equivalent flow transformations that may be applied to the present specification and drawings, or applied directly or indirectly to other related technologies, are included in the scope of the present invention.
Claims (9)
1. A long auger drilling pressure filling pile device with a distance measuring function comprises a long auger stem and a drill bit arranged at the bottom of the long auger stem, wherein the long auger stem comprises a core pipe with a hollow inner part and a helical blade fixed on the outer surface of the core pipe, and the top of the core pipe is communicated with a concrete pump pipeline; the device is characterized by also comprising a conducting rod which is arranged in parallel with the core pipe at intervals; wherein,
the spiral blade is provided with a plurality of through holes which are distributed along the axial direction of the core tube from top to bottom, the guide rod sequentially penetrates through the through holes from top to bottom and is slidably arranged with the inner wall of the through holes, and a preset spacing distance is reserved between the axial line of the through holes and the axial line of the core tube;
a guniting nozzle is arranged on one side of the side wall of the drill bit, which is far away from the guide rod, and the guniting nozzle is communicated with the inside of the core pipe;
the pile grouting device also comprises a distance measuring device which is arranged corresponding to the through hole;
after the through hole is drawn out of the through rod, the distance measuring device measures the distance between the distance measuring device and the concrete column poured by the pile pouring device through the through holes.
2. The long auger drilling pressure grouting pile device with a distance measuring function according to claim 1, wherein the distance measuring device is fixed on the bottom surface of the uppermost helical blade.
3. The long auger drilling pressure-filling pile apparatus with a distance measuring function according to claim 2, wherein the maximum outer diameter of the drill bit is smaller than the preset spacing distance.
4. The long auger drilling pressure-grouting pile device with a distance measuring function according to claim 3, wherein the preset spacing distance is set between 200 and 240 mm.
5. The long auger drilling pressure filling pile device with the distance measuring function as claimed in claim 2, wherein the through hole is circular, the guide rod is cylindrical, and the diameter of the through hole is set between 10 mm and 20 mm.
6. The long auger drilling pressure irrigation pile device with distance measuring function of claim 1, wherein the distance measuring device comprises a control device and a distance measuring sensor in communication connection with the control device, and the distance measuring sensor comprises one or more of a laser distance measuring sensor and an infrared distance measuring sensor.
7. The long auger drilling and pressure filling pile device with the distance measuring function according to any one of claims 1 to 6, wherein a flange connected with a concrete transmission mechanism is formed at the top of the core tube, and the outer diameter of the flange is smaller than the preset spacing distance.
8. The long auger drilling pressure-filling pile device with the distance measuring function according to any one of claims 1 to 6, wherein the distance from the through hole to the edge of the helical blade is set to be between 10 and 25 mm.
9. The long auger drilling pressure filling pile device with the distance measuring function according to any one of claims 1 to 6, wherein the helical blade is fixedly connected with the outer wall of the core tube by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122973930.3U CN216586501U (en) | 2021-11-30 | 2021-11-30 | Long auger drilling pressure-grouting pile device with distance measuring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122973930.3U CN216586501U (en) | 2021-11-30 | 2021-11-30 | Long auger drilling pressure-grouting pile device with distance measuring function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216586501U true CN216586501U (en) | 2022-05-24 |
Family
ID=81652784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122973930.3U Active CN216586501U (en) | 2021-11-30 | 2021-11-30 | Long auger drilling pressure-grouting pile device with distance measuring function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216586501U (en) |
-
2021
- 2021-11-30 CN CN202122973930.3U patent/CN216586501U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106836206A (en) | Casing rotary digging bore forming method | |
| CN111058438B (en) | Long spiral drilling machine pile-forming automatic measurement construction method | |
| CN108589707A (en) | A kind of full-sleeve long screw auger and churning driven combined type construction | |
| CN103821141A (en) | Thread pile construction process | |
| CN216586501U (en) | Long auger drilling pressure-grouting pile device with distance measuring function | |
| EP1194652B1 (en) | Auger piling | |
| CN211500533U (en) | Hole guiding device for geological static pressure pile in rich thick sand layer | |
| CN115387328B (en) | Beach cast-in-place pile construction method based on ultra-long spiral drilling machine | |
| CN107489140B (en) | A kind of method of accurate control CFG stake top elevation | |
| CN214116622U (en) | Device for sucking cement soil slurry backwards | |
| CN210766789U (en) | Device for positioning and controlling verticality of reinforcing cage of manual hole digging pile | |
| CN210737525U (en) | Powder-spraying spiral soil-squeezing pile-forming drilling tool device | |
| CN114164824B (en) | Long steel pile casing filling pile for micro-disturbance to peripheral stratum and application | |
| CN111778969A (en) | Double-sleeve type full-rotation super-long pile construction tool and construction method | |
| CN216108661U (en) | Device for automatically pressure-grouting concrete pile for pressure-grouting pile and drilling tool thereof | |
| CN218757454U (en) | Guiding positioner with soil blocking function for long spiral drilling cast-in-place pile | |
| CN110106874B (en) | Construction method for improving construction quality of prestressed pipe pile | |
| CN216275632U (en) | Blind hole construction elevation control device | |
| CN109113055A (en) | The construction method of composite pile | |
| CN221545686U (en) | Building construction foundation pile | |
| CN218204356U (en) | Anti-collapse device for construction of concrete cast-in-place pile | |
| CN109680687A (en) | A kind of integrally formed construction technology of platform | |
| CN220057961U (en) | A monitoring facilities that is used for precast pile sinking process to prevent crowding soil | |
| CN216194756U (en) | Telescopic vibrating device suitable for post-inserted steel reinforcement cage filling pile | |
| CN211596779U (en) | Long auger drilling machine becomes stake automatic measuring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20240416 Granted publication date: 20220524 |
|
| PP01 | Preservation of patent right |