CN112900418A - Supporting pile convenient to assemble for engineering construction - Google Patents
Supporting pile convenient to assemble for engineering construction Download PDFInfo
- Publication number
- CN112900418A CN112900418A CN202110089108.2A CN202110089108A CN112900418A CN 112900418 A CN112900418 A CN 112900418A CN 202110089108 A CN202110089108 A CN 202110089108A CN 112900418 A CN112900418 A CN 112900418A
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- pile
- block
- fixedly connected
- threaded shaft
- support pile
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of support piles, in particular to a support pile convenient to assemble for engineering construction, which comprises a support pile, a positioning device, a combination device and a reinforcing device, wherein the positioning device is arranged on the inner side of the support pile, the combination device is arranged on the outer side of the support pile, the combination device comprises a combination seat, the bottom end of the support pile is connected with the combination seat in a sliding way, the top end of the combination seat is fixedly connected with a positioning block, the positioning block is connected with the support pile in a sliding way, the inner side of the positioning block is spirally connected with a second threaded shaft, the second threaded shaft penetrates through the positioning block and the support pile, the second threaded shaft is spirally connected with the support pile, through the combination block and a baffle plate, the arrangement is matched with the elastic force of a second spring on the combination block, the spiral connection of the second threaded shaft with the positioning block and the elastic force of a third spring on the baffle plate, and the assembly of the device, the operation is time-saving and labor-saving, and the use and the transportation of the device are greatly facilitated.
Description
Technical Field
The invention relates to the technical field of support piles, in particular to a support pile convenient to assemble for engineering construction.
Background
The support piles are supporting systems composed of H steel with the distance of 2-3 meters, the piles mainly bearing transverse thrust are generally used for foundation pit supporting, slope supporting and landslide control, bear horizontal soil pressure or landslide thrust, generally need higher reinforcing bars than foundation piles bearing vertical force, and are often used together with anchor rods, generally, the support piles are used for foundation pit supporting and the like and are mainly used for bearing lateral rock/soil pressure, the engineering piles are used for bearing vertical load, for example, the foundation piles under high buildings are called as engineering piles, of course, special conditions exist, for example, buildings such as houses and the like are repaired on a landslide with small landslide thrust, the piles are support piles and engineering piles, along with the development of society, the application of the support piles is more and more, the types of the support piles are more and more, but when part of the support piles are used, the assembly is inconvenient, the operation is time-consuming and labor-consuming, so that the operation and the transportation are inconvenient, the strength of the support is not good, the bearing capacity is small, and the collapse accident can be caused in the support process.
Disclosure of Invention
The invention aims to provide a supporting pile convenient to assemble for engineering construction, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a supporting pile convenient to assemble for engineering construction comprises a supporting pile, a positioning device, a combination device and a reinforcing device, wherein the positioning device is arranged on the inner side of the supporting pile, the combination device is arranged on the outer side of the supporting pile, the combination device comprises a combination seat, the bottom end of the supporting pile is connected with the combination seat in a sliding mode, the top end of the combination seat is fixedly connected with a positioning block, the positioning block is connected with the supporting pile in a sliding mode, a second threaded shaft is spirally connected to the inner side of the positioning block and penetrates through the positioning block and the supporting pile, the second threaded shaft is connected with the supporting pile in a spiral mode, a second spring is fixedly connected to the inner side of the combination seat, the other end of the second spring is fixedly connected with a combination block, the top end of the outer side of the supporting pile is connected with a baffle in a sliding mode, the outer side of the baffle is fixedly connected with a third spring, reinforcing devices are arranged at the front end and the rear end of the supporting pile.
Preferably, the combination block penetrates through the combination seat, the combination block is connected with the combination seat in a sliding mode, and the bottom end face of the combination block is arranged in an inclined plane.
Preferably, the positioning device comprises an upper fixing rod, the top end of the inner side of the support pile is fixedly connected with the upper fixing rod, the bottom end of the inner side of the support pile is fixedly connected with a lower fixed rod, the inner side of the upper fixed rod is rotatably connected with a first threaded shaft, the first threaded shaft is rotationally connected with the lower fixed rod, the outer side of the first threaded shaft is spirally connected with a sliding block, the sliding block is connected with the supporting piles in a sliding manner, the outer side of the sliding block is connected with a fixed block in a sliding manner, the fixed block is connected with the supporting piles in a sliding manner, the upper end and the lower end of the outer side of the fixed block are fixedly connected with first springs, the other end of the first spring is fixedly connected with the support pile, a positioning nail is fixedly connected at the central position outside the fixed block, and the locating pin runs through a support pile, the locating pin is connected with the support pile in a sliding mode, a protecting sleeve is fixedly connected to the central position of the outer side of the support pile, and the protecting sleeve is made of a plate made of rubber.
Preferably, the thread direction of the upper end of the first thread shaft is opposite to the thread direction of the lower end of the first thread shaft, the first thread shaft is symmetrically arranged, and the first thread shaft penetrates through the upper fixing rod and the lower fixing rod.
Preferably, the top end of the first threaded shaft is fixedly connected with a connecting sleeve, the bottom end of the first threaded shaft is fixedly connected with a connector, the connecting sleeve is rotatably connected with the upper fixing rod, and the connector is rotatably connected with the lower fixing rod.
Preferably, strengthen the device and include the stopper, the equal fixedly connected with stopper in both ends around the fender pile, stopper outside sliding connection has the enhancement frame, enhancement frame outside fixedly connected with strengthening rib, enhancement frame outside top central point puts to rotate and is connected with the third screw thread axle, and the third screw thread axle runs through the enhancement frame, the screw connection in third screw thread axle outside has the extrusion piece, and extrudees piece and stopper sliding connection, the inboard fixedly connected with resistance plate of stopper.
Preferably, there are 4 strengthening ribs, and the strengthening rib symmetry sets up both ends around the fender pile.
Preferably, the outer side of the extrusion block is fixedly connected with a lug, the lug is connected with a resistance plate in a sliding mode, and the resistance plate is made of a rubber material plate.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the combination block and the baffle plate, the arrangement is matched with the elasticity of the second spring to the combination block, the spiral connection of the second threaded shaft and the positioning block and the elasticity of the third spring to the baffle plate, so that the device is convenient to assemble when in use, time and labor are saved in operation, and the use and transportation of the device are greatly facilitated;
2. according to the invention, through the arrangement of the first threaded shaft and the positioning nail, the arrangement is matched with the spiral connection between the first threaded shaft and the sliding block, the fixed connection between the first threaded shaft and the connecting sleeve and the connecting head, and the elastic force of the first spring to the fixed block and the fixed connection between the fixed block and the positioning nail, when the device is used, the strength of the device during supporting is enhanced, so that the integral bearing capacity of the device is increased, and the ground is supported more stably;
3. according to the invention, through the arrangement of the reinforcing frame and the reinforcing ribs, the arrangement is matched with the fixed connection of the reinforcing frame and the reinforcing ribs, the sliding connection of the limiting block and the reinforcing frame, the spiral connection of the third threaded shaft and the extrusion block, the fixed connection of the limiting block and the resistance plate and the fixed connection of the convex block and the extrusion block, when the device is used, the supporting capability of the device is enhanced, the phenomenon of collapse of the supporting ground is avoided to the greatest extent, and the safety during supporting is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the reinforcing apparatus of the present invention;
fig. 3 is a schematic view of an installation structure of the reinforcing bar of the present invention.
In the figure: 1-support pile, 2-positioning device, 201-upper fixing rod, 202-lower fixing rod, 203-first threaded shaft, 204-connecting sleeve, 205-connecting head, 206-sliding block, 207-fixing block, 208-first spring, 209-positioning nail, 210-protecting sleeve, 3-combination device, 301-combination seat, 302-positioning block, 303-second threaded shaft, 304-second spring, 305-combination block, 306-baffle, 307-third spring, 4-reinforcing device, 401-limiting block, 402-reinforcing frame, 403-reinforcing rib, 404-third threaded shaft, 405-extrusion block, 406-resistance plate and 407-convex block.
Detailed Description
Example 1:
referring to fig. 1, fig. 2 and fig. 3, the present invention provides a technical solution:
a supporting pile convenient to assemble for engineering construction comprises a supporting pile 1, a positioning device 2, a combination device 3 and a reinforcing device 4, wherein the positioning device 2 is arranged on the inner side of the supporting pile 1, the positioning device 2 comprises an upper fixing rod 201, the top end of the inner side of the supporting pile 1 is fixedly connected with the upper fixing rod 201, the bottom end of the inner side of the supporting pile 1 is fixedly connected with a lower fixing rod 202, the inner side of the upper fixing rod 201 is rotatably connected with a first threaded shaft 203, the thread direction of the upper end of the first threaded shaft 203 is opposite to the thread direction of the lower end of the first threaded shaft 203, the first threaded shaft 203 is symmetrically arranged, the first threaded shaft 203 penetrates through the upper fixing rod 201 and the lower fixing rod 202, the arrangement ensures that a positioning nail 209 can be stably inserted into a buried soil layer, the top end of the first threaded shaft 203 is fixedly connected with a connecting sleeve 204, the bottom end of the first threaded shaft 203 is fixedly connected, the connector 205 is rotatably connected with the lower fixing rod 202, the connection function is achieved through the arrangement, so that positioning nails 209 in a plurality of devices can be controlled to be simultaneously inserted into a buried soil layer, the first threaded shaft 203 is rotatably connected with the lower fixing rod 202, a sliding block 206 is spirally connected to the outer side of the first threaded shaft 203, the sliding block 206 is slidably connected with the support pile 1, a fixed block 207 is slidably connected to the outer side of the sliding block 206, the fixed block 207 is slidably connected with the support pile 1, first springs 208 are fixedly connected to the upper end and the lower end of the outer side of the fixed block 207, the other end of each first spring 208 is fixedly connected with the support pile 1, a positioning nail 209 is fixedly connected to the central position of the outer side of the fixed block 207, the positioning nail 209 penetrates through the support pile 1, the positioning nail 209 is slidably connected with the support pile 1, a protective sleeve 210 is fixedly connected to the central position of the outer side of the support pile 1, and, when the device is used, the strength of the device in supporting is enhanced, so that the bearing capacity of the whole device is increased, the ground is supported more stably, the combination device 3 is arranged on the outer side of the supporting pile 1, the combination device 3 comprises a combination seat 301, the bottom end of the supporting pile 1 is slidably connected with the combination seat 301, the top end of the combination seat 301 is fixedly connected with a positioning block 302, the positioning block 302 is slidably connected with the supporting pile 1, the inner side of the positioning block 302 is spirally connected with a second threaded shaft 303, the second threaded shaft 303 penetrates through the positioning block 302 and the supporting pile 1, the second threaded shaft 303 is spirally connected with the supporting pile 1, the inner side of the combination seat 301 is fixedly connected with a second spring 304, the other end of the second spring 304 is fixedly connected with a combination block 305, the combination block 305 penetrates through the combination seat 301, the combination block 305 is slidably connected with the combination seat 301, the bottom end surface of the combination block 305 is provided with an inclined, the operation is simple and convenient, the top end of the outer side of the support pile 1 is connected with the baffle 306 in a sliding way, the outer side of the baffle 306 is fixedly connected with the third spring 307, the other end of the third spring 307 is fixedly connected with the support pile 1, the device assembly is convenient when the device is used, the operation is time-saving and labor-saving, the use and transportation of the device are greatly facilitated, the front end and the rear end of the support pile 1 are respectively provided with the reinforcing device 4, the reinforcing device 4 comprises a limiting block 401, the front end and the rear end of the support pile 1 are respectively and fixedly connected with the limiting block 401, the outer side of the limiting block 401 is connected with the reinforcing frame 402 in a sliding way, the outer side of the reinforcing frame 402 is fixedly connected with the reinforcing ribs 403, the reinforcing ribs 403 are 4, the reinforcing ribs 403 are symmetrically arranged at the front end and the rear end of the support pile 1, the arrangement ensures that the, third threaded shaft 404 outside screwed connection has extrusion piece 405, and extrusion piece 405 and stopper 401 sliding connection, the inboard fixedly connected with resistance board 406 of stopper 401, extrusion piece 405 outside fixedly connected with lug 407, and lug 407 and resistance board 406 sliding connection, resistance board 406 is made by the panel of rubber material, this kind of setting makes the more stable of strengthening frame 402 location, during the use device, the supporting ability of device has been strengthened, the at utmost has avoided strutting the phenomenon that ground appears collapsing, safety when strutting has been guaranteed.
The working process is as follows: when the device is used, a foundation pit is dug firstly, then the device is buried in the foundation pit, when the length of the supporting pile 1 is not long enough, the combined seat 301 is positioned at the bottom end of the other supporting pile 1 through the screw connection of the second threaded shaft 303 and the positioning block 302, then the combined seat 301 fixed at the bottom end of the other supporting pile 1 is inserted into the top of the first supporting pile 1, at the moment, the combined block 305 in the other supporting pile 1 can compress the second spring 304, when the combined block 305 is reset into the combined hole at the top end of the first supporting pile 1, the assembly between the two supporting piles 1 is completed at the moment, because the baffle 306 is arranged outside the combined hole, no soil enters the device, the disassembly of the assembled device is facilitated by pushing the baffle 306 to compress the third spring 307, the operation is time-saving and labor-saving, when the device is assembled, the connector 205 in the other supporting pile 1 is just inserted into the connecting sleeve 204 in the first supporting pile 1 at the moment, then, the above operations are repeated, when the support pile 1 is assembled, the reinforcing frame 402 is just slid to the ground level through the sliding connection of the reinforcing frame 402 and the limiting block 401, then the third threaded shaft 404 is rotated, the extrusion block 405 can continuously drive the projection 407 to be in close contact with the resistance plate 406 made of rubber, when the third threaded shaft 404 cannot continuously rotate, the positioning of the reinforcing frame 402 is completed, because the reinforcing rib 403 is fixedly connected to the outer side of the reinforcing frame 402, the whole strength of the device is strong, the supporting capability is good, the occurrence of collapse accidents is avoided to the greatest extent in the supporting process, when the device is buried, the connecting sleeve 204 at the top end is rotated by using a large-torque electric screwdriver, the engagement between the connecting sleeve 204 and the connecting head 205 is matched, under the limiting of the upper fixing rod 201 and the lower fixing rod 202, the first threaded shaft 203 can rotate, the sliding block 206 can continuously move towards the direction close to the center of the first threaded shaft 203, fixing block 207 can constantly compress first spring 208 this moment, and fixing block 207 can constantly drive location nail 209 and puncture rubber material's lag 210 this moment, and location nail 209 can constantly insert in the earth buried underground after that to greatly increased the intensity when the device is strutted, increased the application scope of device, make the ground of being strutted more stable.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that there are no specific structures but a few objective structures due to the limited character expressions, and that those skilled in the art may make various improvements, decorations or changes without departing from the principle of the invention or may combine the above technical features in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (8)
1. The utility model provides an engineering construction is with fender pile convenient to equipment, includes fender pile (1), positioner (2), composite set (3) and strengthens device (4), its characterized in that: the inner side of the supporting pile (1) is provided with a positioning device (2), the outer side of the supporting pile (1) is provided with a combination device (3), the combination device (3) comprises a combination seat (301), the bottom end of the supporting pile (1) is connected with the combination seat (301) in a sliding manner, the top end of the combination seat (301) is fixedly connected with a positioning block (302), the positioning block (302) is connected with the supporting pile (1) in a sliding manner, the inner side of the positioning block (302) is spirally connected with a second threaded shaft (303), the second threaded shaft (303) penetrates through the positioning block (302) and the supporting pile (1), the second threaded shaft (303) is spirally connected with the supporting pile (1), the inner side of the combination seat (301) is fixedly connected with a second spring (304), the other end of the second spring (304) is fixedly connected with a combination block (305), the outer top end of the supporting pile (1) is connected with a baffle (306, baffle (306) outside fixedly connected with third spring (307), and the other end and a fender pile (1) fixed connection of third spring (307), both ends all are equipped with reinforcing apparatus (4) around fender pile (1).
2. A support pile for construction according to claim 1, wherein the support pile is assembled conveniently, and is characterized in that: the combination block (305) penetrates through the combination seat (301), the combination block (305) is connected with the combination seat (301) in a sliding mode, and the bottom end face of the combination block (305) is arranged in an inclined plane.
3. A support pile for construction according to claim 1, wherein the support pile is assembled conveniently, and is characterized in that: the positioning device (2) comprises an upper fixing rod (201), the top end of the inner side of the supporting pile (1) is fixedly connected with the upper fixing rod (201), the bottom end of the inner side of the supporting pile (1) is fixedly connected with a lower fixing rod (202), the inner side of the upper fixing rod (201) is rotatably connected with a first threaded shaft (203), the first threaded shaft (203) is rotatably connected with the lower fixing rod (202), the outer side of the first threaded shaft (203) is spirally connected with a sliding block (206), the sliding block (206) is slidably connected with the supporting pile (1), the outer side of the sliding block (206) is slidably connected with a fixing block (207), the fixing block (207) is slidably connected with the supporting pile (1), the upper end and the lower end of the outer side of the fixing block (207) are fixedly connected with a first spring (208), the other end of the first spring (208) is fixedly connected with the supporting pile (1), and the central position of the outer side of the fixing block, and a locating nail (209) runs through a support pile (1), the locating nail (209) is connected with the support pile (1) in a sliding manner, a protective sleeve (210) is fixedly connected to the central position of the outer side of the support pile (1), and the protective sleeve (210) is made of a plate made of rubber.
4. A support pile for construction according to claim 3, wherein the support pile is assembled conveniently, and is characterized in that: the thread direction of the upper end of the first thread shaft (203) is opposite to the thread direction of the lower end of the first thread shaft (203), the first thread shaft (203) is symmetrically arranged, and the first thread shaft (203) penetrates through the upper fixing rod (201) and the lower fixing rod (202).
5. A support pile for construction according to claim 3, wherein the support pile is assembled conveniently, and is characterized in that: first threaded shaft (203) top fixedly connected with adapter sleeve (204), first threaded shaft (203) bottom fixedly connected with connector (205), adapter sleeve (204) rotate with last dead lever (201) and are connected, connector (205) rotate with lower dead lever (202) and are connected.
6. A support pile for construction according to claim 1, wherein the support pile is assembled conveniently, and is characterized in that: strengthen device (4) and include stopper (401), the equal fixedly connected with stopper (401) in both ends around fender pile (1), stopper (401) outside sliding connection has reinforcement frame (402), reinforcement frame (402) outside fixedly connected with strengthening rib (403), reinforcement frame (402) outside top central point puts and rotates and is connected with third threaded shaft (404), and third threaded shaft (404) run through reinforcement frame (402), third threaded shaft (404) outside screwed connection has extrusion piece (405), and extrusion piece (405) and stopper (401) sliding connection, stopper (401) inboard fixedly connected with resistance plate (406).
7. A support pile convenient to assemble for engineering construction according to claim 6, wherein: 4 reinforcing ribs (403) are arranged, and the reinforcing ribs (403) are symmetrically arranged at the front end and the rear end of the support pile (1).
8. A support pile convenient to assemble for engineering construction according to claim 6, wherein: the outer side of the extrusion block (405) is fixedly connected with a lug (407), the lug (407) is connected with a resistance plate (406) in a sliding mode, and the resistance plate (406) is made of a rubber plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110089108.2A CN112900418B (en) | 2021-01-22 | 2021-01-22 | Supporting pile convenient to assemble for engineering construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110089108.2A CN112900418B (en) | 2021-01-22 | 2021-01-22 | Supporting pile convenient to assemble for engineering construction |
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| Publication Number | Publication Date |
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| CN112900418A true CN112900418A (en) | 2021-06-04 |
| CN112900418B CN112900418B (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110089108.2A Active CN112900418B (en) | 2021-01-22 | 2021-01-22 | Supporting pile convenient to assemble for engineering construction |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1035133A1 (en) * | 1982-02-19 | 1983-08-15 | Брестский инженерно-строительный институт | Screw pile |
| CN208996024U (en) * | 2018-09-24 | 2019-06-18 | 杨维华 | A kind of waterwork foundation pile structure |
| CN209243706U (en) * | 2018-11-22 | 2019-08-13 | 湖南四维抗震科技有限公司 | A kind of anti-seismic construction pile of Fast Installation disassembly |
| CN211312512U (en) * | 2019-12-13 | 2020-08-21 | 中国地质大学（北京） | Anti-pulling anchor rod |
| CN111794229A (en) * | 2020-08-12 | 2020-10-20 | 陈观荣 | Combined multi-ring multi-hole construction device and method for cutting off cement concrete pile head |
| CN211816210U (en) * | 2019-12-24 | 2020-10-30 | 梁忠文 | Building foundation area stake big-end prestressed pipe pile |
-
2021
- 2021-01-22 CN CN202110089108.2A patent/CN112900418B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1035133A1 (en) * | 1982-02-19 | 1983-08-15 | Брестский инженерно-строительный институт | Screw pile |
| CN208996024U (en) * | 2018-09-24 | 2019-06-18 | 杨维华 | A kind of waterwork foundation pile structure |
| CN209243706U (en) * | 2018-11-22 | 2019-08-13 | 湖南四维抗震科技有限公司 | A kind of anti-seismic construction pile of Fast Installation disassembly |
| CN211312512U (en) * | 2019-12-13 | 2020-08-21 | 中国地质大学（北京） | Anti-pulling anchor rod |
| CN211816210U (en) * | 2019-12-24 | 2020-10-30 | 梁忠文 | Building foundation area stake big-end prestressed pipe pile |
| CN111794229A (en) * | 2020-08-12 | 2020-10-20 | 陈观荣 | Combined multi-ring multi-hole construction device and method for cutting off cement concrete pile head |
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| Publication number | Publication date |
|---|---|
| CN112900418B (en) | 2022-06-07 |
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