CN113718762B - Single-channel cement stirring pile head with bidirectional discharge port - Google Patents
Single-channel cement stirring pile head with bidirectional discharge port Download PDFInfo
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- CN113718762B CN113718762B CN202111057688.3A CN202111057688A CN113718762B CN 113718762 B CN113718762 B CN 113718762B CN 202111057688 A CN202111057688 A CN 202111057688A CN 113718762 B CN113718762 B CN 113718762B
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- blade group
- stirring
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- 238000003756 stirring Methods 0.000 title claims abstract description 137
- 239000004568 cement Substances 0.000 title claims abstract description 72
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 230000008602 contraction Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 18
- 238000007599 discharging Methods 0.000 abstract description 15
- 239000002689 soil Substances 0.000 description 68
- 239000002002 slurry Substances 0.000 description 13
- 238000010276 construction Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000011440 grout Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a cement mixing pile head, in particular to a single-channel bidirectional discharge port cement mixing pile head, which comprises a first mixing blade group and a second mixing blade group which are arranged at intervals in the length direction of a drill rod, wherein the corresponding end part of at least one mixing blade in each first mixing blade group is hinged with the drill rod; the discharging hole of drilling rod corresponds with the stirring vane who articulates to the drilling rod one by one, has a discharging hole to be located its place ahead that corresponds stirring vane in two adjacent discharging hole in the length direction of drilling rod, and another then is located its rear that corresponds stirring vane, be equipped with the slider that corresponds discharging hole one by one on the side of drilling rod, and make reciprocating motion in spacing spout, when every stirring vane rotated towards its slider that corresponds, the slider sealed its discharge gate that corresponds. The method solves the technical problem of improving the pile-forming quality on the premise of ensuring the pile-forming efficiency to the maximum extent, and has the advantages of good pile-forming quality, high pile-forming efficiency and the like.
Description
Technical Field
The invention relates to a cement mixing pile head, in particular to a cement mixing pile head with a single-channel bidirectional discharge port.
Background
The cement mixing pile is an effective form of soft foundation treatment, and is characterized by that it uses cement as main agent of solidifying agent, and utilizes mixing pile machine to spray cement into soil body and fully mix them so as to make cement and soil produce a series of physical and chemical reactions, and make the soft soil be hardened and raise foundation strength. The cement mixing pile is divided into single-shaft, double-shaft and three-shaft mixing piles according to the construction method mainly used.
The existing cement mixing pile machine mainly comprises a pile machine body, a driving unit and a cement mixing pile head. The cement mixing pile head comprises a drill rod and mixing blades which are uniformly distributed along the axial direction of the drill rod, in addition, the center of the drill rod is a cement pouring channel, and an outlet of the cement pouring channel is positioned on the side face of the drill rod.
However, considering the reason of construction efficiency, in most cement mixing pile machines at present, the cement is sprayed into the soil body and the soil body is cut and crushed by the mixing blades simultaneously in the construction process, so that the condition that the soil body which is not fully crushed and the cement paste are directly solidified easily occurs, the final hardening effect of the pile foundation soft soil is influenced, and the pile foundation strength is further influenced. In addition, even if a small part of cement mixing pile machines fully cut and crush the soil body by controlling the working state of the front-end slurry pump in the construction process, and then cement is sprayed into the soil body, the cement is sprayed into the soil body and completely staggered with the cutting and crushing of the soil body by the stirring paddle, so that obvious time difference exists, the construction efficiency of the cement mixing pile machine is influenced, and the pile forming rate of the cement mixing pile in unit time is low.
The invention is invented in view of the above situation.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a single-channel cement mixing pile head with a bidirectional discharge hole.
In order to achieve the aim, the invention designs a single-channel cement mixing pile head with a bidirectional discharge hole, which comprises a drill rod and mixing blades, wherein the stirring blades are uniformly divided into N first stirring blade groups and N-1 second stirring blade groups, N is more than or equal to 2, the first stirring blade groups and the second stirring blade groups are arranged at intervals in the length direction of the drill rod, each first stirring blade group comprises more than one stirring blade, each stirring blade extends outwards from the side surface of the drill rod along the radial direction of the drill rod, the corresponding end part of at least one stirring blade is hinged with the drill rod, the rest stirring blades are respectively fixed with the drill rod, each second stirring blade group also comprises more than one stirring blade, each stirring blade extends outwards from the side face of the drill rod along the radial direction of the drill rod, and the corresponding end parts of all the stirring blades are fixed with the drill rod;
the center of the drill rod is provided with a cement filling channel, the cement filling channel is provided with N discharge holes and corresponds to the stirring blades hinged on the drill rod one by one, one discharge hole in two adjacent discharge holes in the length direction of the drill rod is positioned in front of the corresponding stirring blade, the other discharge hole is positioned behind the corresponding stirring blade, the side surface of the drill rod is provided with a limit chute which corresponds to the discharge hole one by one and is communicated with the corresponding discharge hole, each limit chute is internally provided with a slide block which reciprocates along the respective limit chute and seals the discharge hole when being superposed with the discharge hole of the corresponding discharge hole, a telescopic rod is arranged between each pair of slide blocks and the corresponding stirring blade, one side end part of the outer rod of each telescopic rod is fixed on the corresponding stirring blade, and the other side end part of the outer rod is provided with a through hole, one side end of the inner rod forms a ball head, extends into the through hole of the outer rod, is hinged with the outer rod through the ball head, the other side end of the inner rod is hinged to the corresponding sliding block, when each stirring blade rotates back to the corresponding sliding block, the corresponding telescopic rod is in a contraction state, and the sliding block seals the corresponding discharge hole.
In the single-channel cement stirring pile head with the bidirectional discharge port, under the driving action of a power source (motor) in the construction process, a second stirring blade group or a first stirring blade group and a second stirring blade group which are adjacent to the bottom (tip end) of a drill rod are called as a first stirring blade group, soil layers such as silt, mucky soil, plain filling soil, silt, cohesive soil, loose sandy soil without flowing underground water and the like are drilled firstly, the soil layer corresponding to the first stirring blade group is fully cut and crushed, and a slurry pump does not work in the process; after the soil layer is fully cut and crushed, the drill rod continues to drill, at the moment, the first stirring blade group or the first stirring blade group and the second stirring blade group (originally located above the soil layer) in the latter group are drilled into the soil layer which is fully cut and crushed by the first stirring blade group for continuous stirring, the discharge through holes corresponding to the second stirring blade group are opened under the action of the friction resistance of the soil layer by controlling the rotation direction of the drill rod, the cement slurry is stirred and mixed with the fully cut and crushed soil layer under the action of the hydraulic pressure of the slurry pump, so that the cement slurry and the soil fully generate physical and chemical reactions, and meanwhile, the first stirring blade group also synchronously cuts and crushes the soil layer in the lower layer. With this repeated aforementioned step, and every new first stirring blade group of drilling into, the motor just reverse rotation switches once (original clockwise is rotatory promptly, it is rotatory to be switched into anticlockwise) until boring to the pile bottom design elevation, the drilling rod no longer creeps into this moment, and keep this position to carry out two-way interval rotation, and along with spouting the grout to the soil body, thereby make the grout in the whole section cement stirring pile body obtain abundant vertical and horizontal mixing, stirring with soil, and then ensure that cement and soil fully contact and take place the physical chemistry reaction, improve foundation intensity with better realization weak soil induration.
Meanwhile, as can be seen from the foregoing description, the processes of cutting and crushing the soil layer and spraying cement into the soil body in the construction process of the cement mixing pile head can be kept substantially synchronous, so that the cement mixing pile head can improve the pile forming quality of the cement mixing pile and simultaneously consider the pile forming efficiency.
Preferably, in the above technical solution, a position on the drill rod adjacent to the drill rod tip is a first stirring blade group.
The design of neighbouring drilling rod pointed end (bottom) is first stirring vane group among this preferred technical scheme, considers that second stirring vane group does not set up corresponding discharging channel, and difficult the exploration behind the solidification of pile bottom, consequently this preferred technical scheme provides a cement mixing pile head can avoid appearing the condition that pile foundation bottom is effectively solidified to the at utmost in the work progress to this furthest promotes cement mixing pile machine's pile-forming quality.
The single-channel cement mixing pile head with the bidirectional discharge port, which is disclosed by the invention, has the following technical advantages:
1) after the cement mixing pile forming machine is combined with a cement mixing pile machine for use, the pile forming quality of the cement mixing pile machine can be improved, the strength of a pile foundation is further improved, the pile forming efficiency is not influenced to the maximum extent, the cement mixing pile forming machine has excellent cost performance, and the expected market prospect is wide;
2) the cement mixing pile head has the advantages of simple structure, good use stability and low failure rate.
Drawings
FIG. 1 is a schematic structural diagram of a cement mixing pile head;
FIG. 2 is a schematic structural view (drill rod section view) of the first stirring blade group in FIG. 1;
FIG. 3 is a partial enlarged view at A;
FIG. 4 is a schematic view of the upper first mixing blade assembly of FIG. 1 after it has penetrated into the earth (drill pipe rotating clockwise);
FIG. 5 is a schematic view of the upper first mixing blade assembly of FIG. 1 after it has penetrated into the earth (drill pipe rotating in a counter-clockwise direction);
FIG. 6 is a schematic view of the lower first mixing blade assembly of FIG. 1 after it has penetrated into the earth (drill pipe rotating clockwise);
FIG. 7 is a schematic view of the lower first mixing blade assembly of FIG. 1 after it has penetrated into the earth (drill pipe rotating in a counterclockwise direction);
fig. 8 is a schematic structural view of another cement mixing pile head.
In the figure: the device comprises a drill rod 1, a cement pouring channel 1-1, a discharging through hole 1-2, a limiting chute 1-3, a stirring blade 2, a sliding block 3, an outer rod 4, a through hole 4-1, an inner rod 5, a ball head 5-1, a first stirring blade group 10 and a second stirring blade group 20.
Detailed Description
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 that can be derived from the embodiments of the present invention by a person of ordinary skill in the art are intended to fall within the scope of the present invention.
As shown in fig. 1 and 2, in this embodiment, as an embodiment of the present invention, a single-channel bidirectional discharge cement mixing pile head is provided, which includes a drill rod 1 and mixing blades 2, wherein, the stirring blade 2 is divided into two first stirring blade groups 10 and one second stirring blade group 20, the first stirring blade groups 10 and the second stirring blade groups 20 are arranged at intervals in the length direction of the drill rod 1, and the second stirring blade group 20 is located between the pair of first stirring blade groups 10, each of the first stirring blade groups 10 and the second stirring blade group 20 includes three stirring blades 2, and each stirring blade 2 extends outward in the radial direction of the drill rod 1 from the side surface of the drill rod 1, wherein, the corresponding end part of one stirring blade 2 in each first stirring blade group 10 is hinged with the drill rod 1, and the rest stirring blades 2 are respectively fixed with the drill rod 1.
As shown in fig. 1-3, a cement pouring channel 1-1 is provided at the center of the drill rod 1, the cement pouring channel 1-1 is provided with two discharging through holes 1-2, and the discharging through holes correspond to the stirring blades 2 hinged to the drill rod 1 one by one, one discharging through hole 1-2 is located in front of the corresponding stirring blade 2 (left side in fig. 1), the other discharging through hole is located at the back of the corresponding stirring blade 2 (right side in fig. 1), the side surface of the drill rod 1 is provided with a limiting chute 1-3 which corresponds to the discharging through hole 1-2 one by one and is communicated with the corresponding discharging through hole 1-2, a sliding block 3 which reciprocates along the respective limiting chute 1-3 and closes the discharging hole when being overlapped with the discharging hole of the corresponding discharging through hole 1-2 is provided in each limiting chute 1-3, a telescopic rod (not marked in the figure) is arranged between each pair of sliding blocks 3 and the corresponding stirring blade 2, one side end part of the outer rod 4 of each telescopic rod is fixed on the corresponding stirring blade 2, the other side end part of each telescopic rod is provided with a through hole 4-1, one side end part of the inner rod 5 forms a ball head 5-1 and extends into the through hole 4-1 of the outer rod 4 to be hinged with the outer rod 4 through the ball head 5-1, and the other side end part of each telescopic rod is hinged on the corresponding sliding block 3.
In the actual construction process of the cement mixing pile head, when the mixing blade 2 corresponding to each slide block 3 rotates back to the corresponding slide block, the corresponding telescopic rod is in a contraction state, and the slide block 3 is driven to always seal the corresponding discharge hole under the thrust action of the telescopic rod, as shown in fig. 4 and 7;
on the contrary, when the stirring blade 2 corresponding to each sliding block 3 rotates towards the sliding block, the corresponding telescopic rod is in an extension state, the sliding block 3 slides to the other side of the sliding groove under the action of the tensile force of the telescopic rod, and at the moment, the discharge hole sealed by the sliding block 3 is opened, as shown in fig. 5 and 6.
In the embodiment, in the construction process of the cement mixing pile head with the single-channel two-way discharge hole, under the driving action of a power source (a motor), a first mixing blade group 10 and a second mixing blade group 20 which are adjacent to the bottom (the tip end) of a drill rod 1 are called as a first mixing blade group, soil layers such as silt, mucky soil, plain filling soil, silt, cohesive soil, loose sandy soil without flowing underground water and the like are drilled, the soil layer corresponding to the first mixing blade group is fully cut and crushed, a mud pump does not work in the process or the drill rod 1 is controlled to rotate anticlockwise in a figure 7, the drill rod 1 is selected to rotate anticlockwise in the figure 7, at this time, the first stirring blade group 10 in the first stirring blade group (i.e. the lower first stirring blade group 10 in fig. 7) closes the discharge through hole 1-2 corresponding to the first stirring blade group 10 due to the frictional resistance of the soil body;
after the soil layer is fully cut and crushed, the drill rod 1 continues to drill until the design elevation of the pile bottom is reached, at this time, the next group of first stirring blade group 10 (originally located above the soil layer) is called as a second stirring blade group, and the second stirring blade group is drilled into the soil layer which is fully cut and crushed by the first stirring blade group for continuous stirring, so that the drill rod 1 still rotates anticlockwise as shown in figure 5, the discharge through hole 1-2 corresponding to the second stirring blade set (i.e. the upper first stirring blade set 10 in figure 5) is opened under the action of the frictional resistance of the soil layer, under the action of hydraulic pressure of slurry pump, the cement slurry and the cut and crushed soil layer are mixed to produce physical and chemical reaction, meanwhile, in the process, the first stirring blade group also synchronously cuts and crushes the soil layer below the first stirring blade group fully. At the moment, the drill rod 1 does not drill any more, the drill rod keeps the position to rotate in a bidirectional interval manner, and cement slurry is sprayed to the soil body (as shown in figures 4 and 6, when the drill rod 1 rotates clockwise, the discharge through hole 1-2 corresponding to the first stirring blade group 10 (the lower first stirring blade group 10) in the first stirring blade group is opened, and the discharge through hole 1-2 corresponding to the first stirring blade group 10 (the upper first stirring blade group 10) in the second stirring blade group is closed, otherwise, as shown in figures 5 and 7, the discharge through hole 1-2 corresponding to the first stirring blade group 10 in the first stirring blade group is closed, and the discharge through hole 1-2 corresponding to the first stirring blade group 10 in the second stirring blade group is opened), so that the cement slurry and the soil in the whole section of cement stirring pile body are fully mixed and stirred in the longitudinal and transverse directions, and the cement and the soil are fully contacted to generate a physical and chemical reaction, so as to better realize the soft soil hardening and improve the foundation strength.
Meanwhile, as can be seen from the foregoing description, the processes of cutting and crushing the soil layer and spraying cement into the soil body during the construction process of the cement mixing pile head can be substantially synchronized (except for the drilling process of the first mixing blade group 10 and the second mixing blade group 20 adjacent to the tip of the drill rod 1 and the primary crushing process of the soil body), so that the cement mixing pile head can improve the pile forming quality of the cement mixing pile and also can achieve the pile forming efficiency.
As another embodiment of the present invention, as shown in fig. 8, in the present embodiment, the stirring blades 2 are equally divided into three first stirring blade groups 10 and three second stirring blade groups 20, the first stirring blade groups 10 and the second stirring blade groups 20 are arranged at intervals in the longitudinal direction of the drill rod 1, and the first stirring blade groups 10 are adjacent to the bottom of the drill rod 1.
In the construction process of the single-channel cement mixing pile head with the bidirectional discharge port, under the driving action of a power source (motor), a first mixing blade group 10 and a second mixing blade group 20 which are adjacent to the bottom (tip end) of a drill rod 1 are called as a first mixing blade group, soil layers such as silt, mucky soil, plain filling soil, silt, cohesive soil, loose sandy soil without flowing underground water and the like are drilled in an anticlockwise direction, the soil layer corresponding to the first mixing blade group is fully cut and crushed, a slurry pump does not work in the process, and a discharge through hole 1-2 corresponding to the first mixing blade group 10 (the lower first mixing blade group 10 in fig. 7) in the first mixing blade group is closed, as shown in fig. 7; after the soil layer is fully cut and crushed, the drill rod 1 continues to drill in the counterclockwise direction, at this time, the next group of the first stirring blade group 10 and the second stirring blade group 20 (originally located above the soil layer) is called a second stirring blade group, the drill rod drills into the soil layer fully cut and crushed by the first stirring blade group to continue to stir, under the action of the frictional resistance of the soil layer, the discharge through hole 1-2 corresponding to the first stirring blade group 10 (the upper first stirring blade group 10 in fig. 5) in the second stirring blade group is opened, as shown in fig. 5, under the action of the hydraulic pressure of the mud pump, the cement slurry is stirred and mixed with the fully cut and crushed soil layer, so that the cement slurry and the soil fully undergo a physical and chemical reaction, and at the same time, the first stirring blade group also synchronously fully cuts and crushes the soil layer below. With this repeated aforementioned step, and every new first stirring blade group 10 of drilling into, the motor just reverse rotation switches once (original clockwise is rotatory promptly, it is rotatory to be switched into anticlockwise) until drilling to the pile bottom design elevation, drilling rod 1 does not drill this moment again, and keep this position to carry out two-way interval rotation, and along with spouting the grout to the soil body, thereby make the grout in the whole section cement stirring pile body and soil obtain abundant mixture, the stirring, and then ensure that cement and soil fully contact and take place the physical chemistry reaction, with better realization weak soil induration and improve foundation intensity.
In this embodiment, the tip (bottom) of the drill rod 1 is designed to be the first stirring blade group 10, the drill rod 1 drills to the designed elevation of the pile bottom, and the cement slurry is intermittently sprayed into the soil body by the first stirring blade group 10 at the bottom of the drill rod 1 in the bidirectional interval rotation process, and the second stirring blade group 20 is not provided with a corresponding discharge channel and is not easy to detect after the pile bottom is cured.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, should fall within the protection scope of the present invention.
Claims (2)
1. The utility model provides a two-way discharge gate cement mixing pile head of single channel, includes drilling rod and stirring vane, its characterized in that:
the stirring blades are uniformly divided into N first stirring blade groups and N-1 second stirring blade groups, N is more than or equal to 2, the first stirring blade groups and the second stirring blade groups are arranged at intervals in the length direction of the drill rod, each first stirring blade group comprises more than one stirring blade, each stirring blade extends outwards from the side surface of the drill rod along the radial direction of the drill rod, the corresponding end part of at least one stirring blade is hinged with the drill rod, the rest stirring blades are respectively fixed with the drill rod, each second stirring blade group also comprises more than one stirring blade, each stirring blade extends outwards from the side surface of the drill rod along the radial direction of the drill rod, and the corresponding end parts of all the stirring blades are fixed with the drill rod;
the center of the drill rod is provided with a cement pouring channel, the cement pouring channel is provided with N discharge through holes which correspond to the stirring blades hinged on the drill rod one by one, one of two adjacent discharge through holes in the length direction of the drill rod is positioned in front of the corresponding stirring blade, the other one is positioned behind the corresponding stirring blade, the side surface of the drill rod is provided with limit chutes which correspond to the discharge through holes one by one and are communicated with the corresponding discharge through holes, each limit chute is internally provided with a slide block which reciprocates along the respective limit chute and seals the discharge hole when being superposed with the discharge hole of the corresponding discharge through hole, a telescopic rod is arranged between each pair of slide blocks and the corresponding stirring blade, one side end part of an outer rod of each telescopic rod is fixed on the corresponding stirring blade, and the other side end part of the outer rod is provided with a through hole, one side end of the inner rod forms a ball head, extends into the through hole of the outer rod, is hinged with the outer rod through the ball head, the other side end of the inner rod is hinged to the corresponding sliding block, when each stirring blade rotates back to the corresponding sliding block, the corresponding telescopic rod is in a contraction state, and the sliding block seals the corresponding discharge hole.
2. The single-channel cement mixing pile head with the bidirectional discharge hole as in claim 1, wherein: the position of the drill rod adjacent to the drill rod tip is a first stirring blade group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111057688.3A CN113718762B (en) | 2021-09-09 | 2021-09-09 | Single-channel cement stirring pile head with bidirectional discharge port |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111057688.3A CN113718762B (en) | 2021-09-09 | 2021-09-09 | Single-channel cement stirring pile head with bidirectional discharge port |
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| CN113718762A CN113718762A (en) | 2021-11-30 |
| CN113718762B true CN113718762B (en) | 2022-08-09 |
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| CN113718762A (en) | 2021-11-30 |
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Inventor after: Peng Jian Inventor after: He Feng Inventor after: Cao Xin Inventor before: Peng Jian Inventor before: He Feng Inventor before: Cao Xin |
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Effective date of registration: 20221101 Address after: 8-2-1, No. 551, Dongqianhu Avenue, Dongqianhu Town, Yinzhou District, Ningbo City, Zhejiang Province 315100 Patentee after: Ningbo Zhongming Geotechnical Engineering Co.,Ltd. Address before: Room 502-b-1, No.1-2, qianyangzhixing square, 996 Changxing Road, Jiangbei District, Ningbo City, Zhejiang Province, 315000 Patentee before: Zhejiang Haoda Foundation Engineering Co.,Ltd. |
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Denomination of invention: A single channel bidirectional discharge port cement mixing pile head Effective date of registration: 20231011 Granted publication date: 20220809 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Ningbo Yinzhou Branch Pledgor: Ningbo Zhongming Geotechnical Engineering Co.,Ltd. Registration number: Y2023980060591 |