CN114371025A - Adjustable cast-in-place pile hole bottom rock sample sampler and using method thereof - Google Patents
Adjustable cast-in-place pile hole bottom rock sample sampler and using method thereof Download PDFInfo
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- CN114371025A CN114371025A CN202111478930.4A CN202111478930A CN114371025A CN 114371025 A CN114371025 A CN 114371025A CN 202111478930 A CN202111478930 A CN 202111478930A CN 114371025 A CN114371025 A CN 114371025A
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- fishing
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- pile hole
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- 239000011435 rock Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 239000002893 slag Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000013049 sediment Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to an adjustable bored concrete pile hole bottom rock sample sampler and a using method thereof, which comprises a handheld part and a fishing mechanism, wherein the handheld part is used for being handheld and operated by an operator; an intermediate rod is arranged in the salvaging mechanism, a salvaging space for retaining slag is formed between the intermediate rod and the inner side of the salvaging mechanism, one end of the intermediate rod is positioned at the center of the salvaging end of the salvaging mechanism, and the other end of the intermediate rod is connected with the collecting end of the salvaging mechanism through a connecting rod; the flexible connecting piece is detachably connected between the material receiving end of the fishing mechanism and the handheld part, the fishing device is simple in structure and convenient to operate, the time for waiting for the sediment to roll from the slurry to the upper part can be effectively reduced, and the pit depth can be accurately measured.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to an adjustable bored concrete pile hole bottom rock sample sampler and a using method thereof.
Background
Along with the development of economy in China and the acceleration of construction steps of public facility buildings, the quality requirement on construction engineering is higher and higher, and once quality accidents occur, the life and property safety of people can be directly influenced, wherein the cast-in-situ bored pile is one of pile foundations commonly used in construction engineering and widely used, and the cast-in-situ bored pile is widely applied to the engineering; the pile foundation often needs to be punched in an impact or rotary drilling mode in the construction process, however, due to the fact that the punching depth is large, in the hole forming process, the rock judging work is very important.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an adjustable bored concrete pile hole bottom rock sample sampler and a using method thereof, so as to overcome the defects of long time, inconvenience in fishing and the like of the conventional sediment fishing, and solve the requirement that the sediment is fished first in rock judgment.
In order to achieve the purpose, the adjustable bored concrete pile hole bed rock sample sampler comprises a handheld part and a fishing mechanism, wherein the handheld part is used for being handheld by an operator, the fishing mechanism comprises a plurality of straight rods with equal length and a fixing part, one end of each straight rod is fixed on the fixing part at equal intervals to form a material receiving end of an opening of the fishing mechanism, the other ends of the straight rods are gathered to form a narrow fishing end of the fishing mechanism, the fishing end is connected with the material receiving end in a smooth and smooth mode, and the cross section area of the fishing mechanism is gradually reduced from the material receiving end to the material fishing end;
an intermediate rod is arranged in the salvaging mechanism, a salvaging space for retaining slag is formed between the intermediate rod and the inner side of the salvaging mechanism, one end of the intermediate rod is positioned at the center of the salvaging end of the salvaging mechanism, and the other end of the intermediate rod is connected with the collecting end of the salvaging mechanism through a connecting rod;
a flexible connecting piece is detachably connected between the material receiving end of the fishing mechanism and the handheld portion.
Preferably, the middle rod is positioned on or close to an axis where the central points of the material receiving end and the material fishing end of the fishing mechanism are positioned.
Preferably, the angle formed by the middle rod and each straight rod is the same, and the angle formed by the middle rod and each straight rod is 30-75 degrees.
Preferably, the fixing member is a closed planar figure.
Preferably, the connecting rod comprises at least six round steel, and the round steel is fixed between the intermediate lever and the fixing piece at equal angles.
Preferably, a vertical circular ring is fixedly arranged at the top of one end, close to the connecting rod, of the middle rod, and the circular ring is detachably connected with the flexible connecting piece.
Preferably, the middle rod is internally provided with a cavity, and a detachable cover plate is arranged at the top of one end, far away from the connecting rod, of the middle rod and can close or open the cavity in the middle rod.
Preferably, the flexible connecting piece is a lifting rope, and scales are arranged on the lifting rope.
The invention also provides a using method of the adjustable bored concrete pile hole bottom rock sample sampler, and the adjustable bored concrete pile hole bottom rock sample sampler comprises the following steps:
a1: two ends of the flexible connecting piece are respectively connected with the handheld part and the fishing mechanism, an operator holds the handheld part by hand, and the fishing mechanism continuously extends the flexible connecting piece by utilizing self gravity to enable the fishing mechanism to be smoothly lowered to the bottom of the hole;
a2: along with the continuous lowering of the flexible connecting piece in the slurry, when the flexible connecting piece is lowered to a proper depth, the continuous lifting fishing mechanism senses whether rock debris exists in the slurry at the current position;
if the existence of the rock debris is not sensed, the flexible connecting piece is continuously lowered until the rock debris is sensed;
if the existence of rock debris is sensed, the flexible connecting piece is dragged to drive the fishing mechanism to collect the debris, and after the collection is finished, the handheld part is rotated to recover the flexible connecting piece, so that the fishing debris is driven to rise, and the debris fishing work is completed.
Preferably, in the step a 1: if the resistance in the slurry in the pile hole is larger than the gravity of the salvaging mechanism, the cover plate can be opened, the weight increasing block is put into the cavity of the middle rod, then the cover plate is closed, and the gravity of the salvaging mechanism is increased, so that the salvaging work can be smoothly completed.
Compared with the prior art, the invention has the beneficial effects that:
1. the fishing mechanism and the intermediate rod form a fishing device which is tightened downwards, so that the mud can be conveniently and directly fished by using the flexible connecting piece when not rolling, the time for waiting the sediment to roll to the upper part is reduced, the punching and cleaning efficiency of the cast-in-place pile is improved, and the waste of engineering time is reduced;
2. the scales arranged on the flexible connecting piece can measure the height of the bottom of the hole while fishing sediment, so that on one hand, the subsequent measuring process is reduced, and on the other hand, the precision of measuring the depth of the hole is improved;
3. according to the invention, the middle rod with a hollow design is adopted, so that the balancing weight can be added, and the salvaging result can be effectively finished in the mud salvaging process under different resistances;
4. the middle rod and the fishing mechanism are matched to fish the slag, so that gaps of the fishing mechanism are effectively reduced, the sediment is ensured to be stable in the rising process while slurry is effectively discharged, the sediment with smaller volume can be effectively fished, and the straight rods at the fishing end of the fishing mechanism are gathered, so that useless objects except the sediment are prevented from being fished.
Drawings
FIG. 1 is a side view of an adjustable slag scoop of the present invention;
FIG. 2 is an enlarged view at A of FIG. 1;
FIG. 3 is a top view C-C of an embodiment of a circular fastener;
FIG. 4 is a top view C-C of an embodiment of an octagonal fastener;
in the figure: 1-a handheld part 2-a flexible connecting piece 3-a circular ring 4-a fishing mechanism 41-a straight rod 42-a fixing piece 43-a connecting rod 5-an intermediate rod.
Detailed Description
To explain the technical content, structural features, attained objects and effects of the present invention in detail, embodiments are described below in detail with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
Referring to fig. 1, the invention provides an adjustable sampler for a bored concrete pile hole bed rock sample, which comprises a handheld part 1 used for being handheld by an operator, and a fishing mechanism 4, wherein a flexible connecting piece 2 is detachably connected between the fishing mechanism 4 and the handheld part 1, for example, the flexible connecting piece 2 can adopt a lifting rope, the connection between the two ends of the lifting rope and the handheld part 1 and the fishing mechanism 4 can be directly knotted, or other fixing devices (such as a U-shaped screw) can be adopted for fixing, so that the installation and the disassembly are convenient, and further, when the sampler is used, the lifting rope can be loosened or recovered, the lifting of the fishing mechanism 4 is realized, and the sediment fishing is further completed. Meanwhile, in the process of drilling the cast-in-place pile, the depth of the drilled hole is continuously measured, construction can be guaranteed to be completed according to the set requirements of engineering, scales can be arranged on the lifting rope in combination with the graph shown in fig. 2, when the fishing mechanism 4 is to be sunk into the lowest position of the pile hole, the drilling depth can be measured by the scales on the lifting rope, the subsequent independent measuring process is reduced, and the construction efficiency is further improved. When in actual use, the handheld portion 1 can adopt the structure of the handheld operation of being convenient for, like ring shape, U type etc. the simplest is like a rectangular shape round bar, and operating personnel can operate handheld rectangular shape round bar both ends, also can block in stake hole department when salvaging, and the salvage operation of being convenient for can.
The fishing mechanism 4 comprises a plurality of straight rods 41 with equal length and a fixing part 42, one ends of the straight rods 41 are fixed on the fixing part 42 at equal intervals to form an open material receiving end of the fishing mechanism 4, in order to facilitate fixing of the opening shape of the fishing mechanism 4 and facilitate fishing of sediments, the fixing part 42 is in a closed plane figure shape, as shown in fig. 3, the fixing part 42 is in a ring 3 shape, one ends of the straight rods 41 are fixedly connected to the fixing part 42 in an equal distribution point, if three straight rods 41 are arranged, the ends of the straight rods 41 are uniformly fixed at the trisection point position of the ring 3-shaped fixing part 42, and similarly, if six straight rods 41 are arranged, the ends of the straight rods 41 are uniformly fixed at the sextant point position of the ring 3-shaped fixing part 42. In the actual use process, the number of the optimized straight rods 41 is 8, so that the stability and the fishing effect can be effectively considered. The other ends of the straight rods 41 are gathered to form a narrow fishing end of the fishing mechanism 4, in the actual use process, the ends of the straight rods 41 forming the fishing end of the fishing mechanism 4 can be in contact with each other and can be spaced at a certain distance, the fishing effect can be effectively finished as long as the diameter of the fishing end is larger than the diameter of the fishing sediment, the fishing end is smoothly connected with the receiving end, and the cross section area of the fishing mechanism 4 is gradually reduced from the receiving end to the fishing end; further, the shape of the fishing mechanism 4 is similar to the shape of a cone or a round table, and the fished sediments can be effectively loaded. As shown in fig. 4, the fixing member 42 may be an octahedral structure, and a straight rod 41 is obliquely fixed at each corner, so that the fishing mechanism 4 is shaped like a pyramid. In the actual use process, can use according to actual conditions is nimble.
An intermediate rod 5 is also arranged in the salvaging mechanism 4, a salvaging space for retaining slag is formed between the intermediate rod 5 and the inner side of the salvaging mechanism 4, one end of the intermediate rod 5 is positioned at the center of the salvaging end of the salvaging mechanism 4, the other end is connected with the collecting end of the salvaging mechanism 4 through a connecting rod 43, on one hand, the intermediate rod 5 can reduce the transverse area of the salvaging mechanism 4, further realizing the salvaging effect of smaller sediments in the salvaging process, meanwhile, the middle rod 5 is positioned on or close to the axis where the central point of the receiving end and the salvaging end of the salvaging mechanism 4 is positioned, the angles formed by the middle rod 5 and each straight rod 41 are the same, the middle rod 5 is ensured to be positioned near the longitudinal central axis of the salvaging mechanism 4, therefore, in the process of stretching the fishing mechanism 4 through the lifting rope, the whole fishing mechanism 4 can be kept balanced or horizontal, and the phenomenon that the fishing amount of sediments is influenced due to inclination is prevented.
Preferably, the angle formed by the intermediate rod 5 and the straight rod 41 is 30-75 degrees, and the conical or pyramid-shaped fishing mechanism 4 formed at the angle in the interval can avoid the condition that sediments fall off in the fishing process as far as possible on the premise of ensuring the fishing amount.
For being connected with fishing mechanism 4 in the middle of being convenient for, connecting rod 43 can adopt six piece at least round steel, the angle such as round steel be fixed in the middle of the pole 5 with be between the mounting 42, as figure 3, the round steel quantity is 3, mutually with 120 jiaos fixed mounting, also can be as shown in figure 4, the round steel quantity is 2, two round steels are a sharp installation side by side, the space that forms between two adjacent round steel and the mounting 42 is far greater than the space that forms between two adjacent straight-bars 41, and then can not influence the effect of dragging for the sediment.
Furthermore, a vertical ring 3 is fixedly arranged at the top of one end of the middle rod 5 close to the connecting rod 43, and the ring 3 can be used as a mounting point to be mounted and dismounted with the flexible connecting piece 2.
In order to ensure that an effective fishing effect can be still achieved when the slurry concentration is too high, on one hand, the diameter of the middle rod 5 can be increased, and further the weight of the fishing mechanism 4 can be increased, on the other hand, the inside of the middle rod 5 can be designed into a cavity, a detachable cover plate is arranged at the top of one end, away from the connecting rod 43, of the middle rod 5, and the cavity in the middle rod 5 can be closed or opened. Like this when 4 self gravities of salvage mechanism are not enough to sink into the mud bottom, can increase the balancing weight in the cavity, and then realize effectual salvage effect.
The invention also provides a using method of the adjustable bored concrete pile hole bottom rock sample sampler, which adopts the adjustable bored concrete pile hole bottom rock sample sampler and comprises the following steps:
a1: two ends of the flexible connecting piece 2 are respectively connected with the handheld part 1 and the fishing mechanism 4, an operator holds the handheld part 1 by hand, and the fishing mechanism 4 continuously extends the flexible connecting piece 2 by utilizing self gravity to enable the fishing mechanism 4 to be smoothly lowered to the bottom of a hole;
a2: along with the continuous lowering of the flexible connecting piece 2 in the slurry, when the flexible connecting piece is lowered to a proper depth, the fishing mechanism 4 is continuously lifted up and down to sense whether rock debris exists in the slurry at the current position;
if the existence of the rock debris is not sensed, the flexible connecting piece 2 is continuously lowered until the rock debris is sensed;
if the existence of rock debris is sensed, the flexible connecting piece 2 is dragged to drive the fishing mechanism 4 to collect the debris, and after the collection is finished, the handheld part 1 is rotated to recover the flexible connecting piece 2, so that the fishing debris is driven to rise, and the debris fishing work is completed.
In the step a1, if the resistance in the slurry in the pile hole is greater than the gravity of the fishing mechanism 4, the cover plate can be opened, the weight increasing block is put into the cavity of the middle rod 5, and then the cover plate is closed, so that the gravity of the fishing mechanism 4 is increased, and the fishing work can be completed smoothly.
It should be understood that the above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, so that the equivalent changes and modifications made in the light of the above disclosure and the appended claims are all within the scope of the present invention.
Claims (10)
1. The utility model provides a bored concrete pile hole basement appearance sampler with adjustable, includes a handheld portion for the handheld operation of operating personnel, its characterized in that:
the fishing device is characterized by further comprising a fishing mechanism, wherein the fishing mechanism comprises a plurality of straight rods with equal length and a fixing piece, one ends of the plurality of straight rods are fixed on the fixing piece at equal intervals to form a material receiving end of an opening of the fishing mechanism, the other ends of the plurality of straight rods are gathered to form a material fishing end of a narrow opening of the fishing mechanism, the material fishing end is connected with the material receiving end in a smooth mode, and the cross section area of the fishing mechanism is gradually reduced from the material receiving end to the material fishing end;
an intermediate rod is arranged in the salvaging mechanism, a salvaging space for retaining slag is formed between the intermediate rod and the inner side of the salvaging mechanism, one end of the intermediate rod is positioned at the center of the salvaging end of the salvaging mechanism, and the other end of the intermediate rod is connected with the collecting end of the salvaging mechanism through a connecting rod;
a flexible connecting piece is detachably connected between the material receiving end of the fishing mechanism and the handheld portion.
2. The adjustable bored concrete pile hole bed rock sample sampler of claim 1, characterized in that: the middle rod is positioned on or close to the axis where the central points of the material receiving end and the material fishing end of the fishing mechanism are positioned.
3. The adjustable bored concrete pile hole bed rock sample sampler of claim 2, characterized in that: the angle formed by the middle rod and each straight rod is the same, and the angle formed by the middle rod and each straight rod is 30-75 degrees.
4. The adjustable bored concrete pile hole bed rock sample sampler of claim 1, characterized in that: the fixing piece is a closed plane figure.
5. The adjustable bored concrete pile hole bed rock sample sampler of claim 4, characterized in that: the connecting rod comprises at least six round steel, the round steel is fixed between the intermediate lever and the fixing piece at equal angles.
6. The adjustable bored concrete pile hole bed rock sample sampler of claim 1, characterized in that: the top of one end, close to the connecting rod, of the middle rod is fixedly provided with a vertical circular ring, and the circular ring is detachably connected with the flexible connecting piece.
7. The adjustable bored concrete pile hole bed rock sample sampler of claim 1, characterized in that: the middle rod is internally provided with a cavity, a detachable cover plate is arranged at the top of one end, far away from the connecting rod, of the middle rod, and the cavity in the middle rod can be closed or opened.
8. The adjustable bored concrete pile hole bed rock sample sampler of claim 1, characterized in that: the flexible connecting piece is a lifting rope, and scales are arranged on the lifting rope.
9. The use method of the adjustable cast-in-place pile hole bottom rock sample sampler is characterized by comprising the following steps of: the adjustable bored concrete pile hole bottom rock sample sampler adopting any one of claims 1-8, comprises the following steps:
a1: two ends of the flexible connecting piece are respectively connected with the handheld part and the fishing mechanism, an operator holds the handheld part by hand, and the fishing mechanism continuously extends the flexible connecting piece by utilizing self gravity to enable the fishing mechanism to be smoothly lowered to the bottom of the hole;
a2: along with the continuous lowering of the flexible connecting piece in the slurry, when the flexible connecting piece is lowered to a proper depth, the continuous lifting fishing mechanism senses whether rock debris exists in the slurry at the current position;
if the existence of the rock debris is not sensed, the flexible connecting piece is continuously lowered until the rock debris is sensed;
if the existence of rock debris is sensed, the flexible connecting piece is dragged to drive the fishing mechanism to collect the debris, and after the collection is finished, the handheld part is rotated to recover the flexible connecting piece, so that the fishing debris is driven to rise, and the debris fishing work is completed.
10. The use method of the adjustable bored concrete pile hole bottom rock sample sampler according to claim 7, characterized in that: in the step A1:
if the resistance in the slurry in the pile hole is larger than the gravity of the salvaging mechanism, the cover plate can be opened, the weight increasing block is put into the cavity of the middle rod, then the cover plate is closed, and the gravity of the salvaging mechanism is increased, so that the salvaging work can be smoothly completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111478930.4A CN114371025A (en) | 2021-12-07 | 2021-12-07 | Adjustable cast-in-place pile hole bottom rock sample sampler and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111478930.4A CN114371025A (en) | 2021-12-07 | 2021-12-07 | Adjustable cast-in-place pile hole bottom rock sample sampler and using method thereof |
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| Publication Number | Publication Date |
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| CN114371025A true CN114371025A (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111478930.4A Pending CN114371025A (en) | 2021-12-07 | 2021-12-07 | Adjustable cast-in-place pile hole bottom rock sample sampler and using method thereof |
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|---|---|---|---|---|
| CN205975708U (en) * | 2016-07-05 | 2017-02-22 | 福建岩土工程勘察研究院 | First detector of bored concrete pile |
| CN108643852A (en) * | 2018-04-26 | 2018-10-12 | 中冶建工集团有限公司 | A kind of deep hole stake cleaning dregs system |
| CN208917890U (en) * | 2018-10-10 | 2019-05-31 | 中铁十七局集团第二工程有限公司 | A kind of pile foundation underwater gliders height measuring gauge |
| CN211228629U (en) * | 2019-09-11 | 2020-08-11 | 中建市政工程有限公司 | Underwater pile slag sampler with variable-weight orientation function |
| CN111519672A (en) * | 2020-05-28 | 2020-08-11 | 中铁二十二局集团市政工程有限公司 | Cast-in-place pile sediment measuring device and measuring method thereof |
| CN113006726A (en) * | 2021-02-26 | 2021-06-22 | 中国一冶集团有限公司 | Adjustable lifting device for rapidly grabbing and dragging reinforcement cage in slurry hole |
| CN213627490U (en) * | 2020-09-27 | 2021-07-06 | 深圳市盛业地下工程有限公司 | Hole cleaning system for cast-in-place pile |
| CN113668534A (en) * | 2021-08-31 | 2021-11-19 | 中铁十四局集团第三工程有限公司 | Novel combined slag extractor and use method thereof |
-
2021
- 2021-12-07 CN CN202111478930.4A patent/CN114371025A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205975708U (en) * | 2016-07-05 | 2017-02-22 | 福建岩土工程勘察研究院 | First detector of bored concrete pile |
| CN108643852A (en) * | 2018-04-26 | 2018-10-12 | 中冶建工集团有限公司 | A kind of deep hole stake cleaning dregs system |
| CN208917890U (en) * | 2018-10-10 | 2019-05-31 | 中铁十七局集团第二工程有限公司 | A kind of pile foundation underwater gliders height measuring gauge |
| CN211228629U (en) * | 2019-09-11 | 2020-08-11 | 中建市政工程有限公司 | Underwater pile slag sampler with variable-weight orientation function |
| CN111519672A (en) * | 2020-05-28 | 2020-08-11 | 中铁二十二局集团市政工程有限公司 | Cast-in-place pile sediment measuring device and measuring method thereof |
| CN213627490U (en) * | 2020-09-27 | 2021-07-06 | 深圳市盛业地下工程有限公司 | Hole cleaning system for cast-in-place pile |
| CN113006726A (en) * | 2021-02-26 | 2021-06-22 | 中国一冶集团有限公司 | Adjustable lifting device for rapidly grabbing and dragging reinforcement cage in slurry hole |
| CN113668534A (en) * | 2021-08-31 | 2021-11-19 | 中铁十四局集团第三工程有限公司 | Novel combined slag extractor and use method thereof |
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