CN110700256A - Spiral clamping cylinder type composite spiral anchor and spiral clamping cylinder - Google Patents
Spiral clamping cylinder type composite spiral anchor and spiral clamping cylinder Download PDFInfo
- Publication number
- CN110700256A CN110700256A CN201911031387.6A CN201911031387A CN110700256A CN 110700256 A CN110700256 A CN 110700256A CN 201911031387 A CN201911031387 A CN 201911031387A CN 110700256 A CN110700256 A CN 110700256A
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- spiral
- anchor
- spiral anchor
- thick bamboo
- clamping cylinder
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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
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
- E02D5/801—Ground anchors driven by screwing
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
- E04H12/2207—Sockets or holders for poles or posts not used
- E04H12/2215—Sockets or holders for poles or posts not used driven into the ground
- E04H12/2223—Sockets or holders for poles or posts not used driven into the ground by screwing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/1671—Shapes helical or spiral
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the field of constructional engineering, in particular to a spiral clamping cylinder type composite spiral anchor which comprises an anchor rod, a spiral anchor disc and a spiral clamping cylinder, wherein the spiral anchor disc is coaxially and fixedly arranged on the anchor rod, the spiral clamping cylinder comprises an upper spiral anchor disc of the clamping cylinder, a lower spiral anchor disc of the clamping cylinder and a cylinder body, the cylinder body is coaxially sleeved outside the anchor rod, two ends of the cylinder body are respectively and fixedly connected with the upper spiral anchor disc of the clamping cylinder and the lower spiral anchor disc of the clamping cylinder, a soil outlet is arranged on the upper spiral anchor disc of the clamping cylinder, and a soil inlet is arranged on the lower spiral anchor disc of the clamping cylinder. The rotary clamping cylinder type composite spiral anchor has the advantages of large horizontal force bearing capacity, no need of secondary excavation, time and labor saving, small disturbance to soil, full utilization of the strength of a soil body structure and high economical efficiency.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a spiral clamping cylinder type composite spiral anchor and a spiral clamping cylinder.
Background
The spiral anchor foundation is applied to the fields of constructional engineering (such as steel structures and the like), electric power engineering (transformer substations, transmission lines and the like), communication towers and the like.
In the engineering construction of high-voltage transmission lines, a soft geological area such as silt is inevitably passed, a large plate foundation, a pile foundation, a cast foundation or a gravity type foundation is mostly adopted for a tower foundation in the area, although the safety of the transmission line is ensured, the material consumption is large, the excavation of a foundation pit is difficult, the investment is large, and the construction period is long, so that the change of the type of the existing tower or stay wire foundation is necessary and increasingly receives the attention of the engineering field, and the spiral anchor rod foundation is increasingly widely applied due to the advantages of simple manufacture, convenient installation and construction, short construction period, low manufacturing cost and small damage to the environment. The spiral anchor mainly comprises an anchor rod and a spiral anchor disc, wherein the spiral anchor disc is arranged on the anchor rod, and the anchor rod is made of high-strength pipes or common steel pipes. The moment is applied to the spiral anchor, the spiral anchor is screwed into the soil, and the spiral anchor is screwed into the soil by the static force, so that the disturbance to the soil body is very small, and the strength of the soil body structure can be fully utilized.
The bearing capacity index of the screw anchor foundation mainly comprises the capacity of bearing uplift force, downforce and horizontal force, when the screw anchor is installed in a section with poor geological conditions and loose soil, the bearing capacity of the common screw anchor foundation can be smaller than the bearing capacity required by a bearing object, so that the anchor rod needs to be lengthened, the diameter of a screw anchor disk is increased, the requirement of the uplift force and the downforce can be met by increasing the burial depth of the screw anchor, but due to the increase of the length-diameter ratio, the bending moment borne by the screw anchor can be increased, the horizontal displacement, deflection or deformation of the screw anchor is caused, and the horizontal deformation and the inclination angle deformation of the top of the communication tower are caused. If the diameter and the wall thickness of the anchor rod are increased, the bearing horizontal force capacity of the spiral anchor can be improved, but the cost is greatly increased, and the difficulty of transportation and construction is increased.
CN107842033A discloses a construction method of a composite spiral anchor foundation, firstly, a rotary drill bit is adopted to rotate downwards to a specified elevation and then stop, and a space to be filled is formed between a soil layer at the specified elevation and the ground; the spiral anchor drill bit consisting of the anchor rod and the anchor sheet is replaced and continuously screwed downwards; when the anchor piece part of the spiral anchor penetrates through the soft soil layer and is screwed into the lower stable soil layer, the drill bit is controlled to loosen the spiral anchor and withdraw from the ground; standing for a period of time, and grouting the anchor rod/space to be filled after the soil is stabilized to form an anchoring body/pile foundation. The construction method needs to perform excavation twice and pour concrete, the working procedure is complex, the construction period is long, the disturbance degree of excavation on soil is large, and the deformation resistance of the soil is reduced.
CN108914961A discloses a communication iron tower basis that adopts screw anchor, including the screw anchor, the screw anchor is including being located a plurality of vertical screw anchors of concrete cushion cap downside middle part, is located a plurality of oblique screw anchors of vertical screw anchor periphery. The vertical screw anchor mainly bears vertical load and upper pulling load, and the screw anchor can mainly improve horizontal force resistance and horizontal deformation resistance of a foundation besides the vertical load and the upper pulling load, so that horizontal deformation and inclination deformation of the horizontal tower top are reduced. The communication iron tower foundation needs to be provided with a plurality of inclined spiral anchors, so the cost is high, the construction period is long, and the inclined spiral anchors radiate to the periphery by taking the vertical spiral anchors as the center, so that the damage to low attachments or vegetation is large.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides the spiral clamping cylinder type composite spiral anchor which has the advantages of higher horizontal force bearing capacity, no need of secondary excavation, time and labor saving, less disturbance to soil, capability of fully utilizing the strength of a soil body structure and high economical efficiency.
The technical problem to be solved by the invention is realized by adopting the following technical scheme: the utility model provides a compound spiral anchor of spiral card cylinder, includes stock, spiral anchor plate and spiral card section of thick bamboo, the spiral anchor plate is coaxial to set firmly on the stock, spiral card section of thick bamboo is spiral anchor plate, card section of thick bamboo down spiral anchor plate and barrel on the card section of thick bamboo, the coaxial cover of barrel is established in the stock outside and its both ends respectively with card section of thick bamboo on spiral anchor plate and card section of thick bamboo spiral anchor plate fixed connection down, be equipped with soil outlet on the spiral anchor plate on the card section of thick bamboo, be equipped with soil inlet under the card section of thick bamboo on the spiral anchor plate.
The technical scheme of the invention is as follows: the diameters of the upper spiral anchor plate of the clamping cylinder and the lower spiral anchor plate of the clamping cylinder are larger than the diameter of the cylinder body. By adopting the technical scheme, the diameters of the spiral anchor disk on the clamping cylinder and the spiral anchor disk under the clamping cylinder are larger than the diameter of the cylinder body, and the acting forces of the spiral anchor disk on the clamping cylinder and the spiral anchor disk under the clamping cylinder and soil improve the precession force of the spiral clamping cylinder, so that the spiral clamping cylinder can more easily drill into the soil.
The technical scheme of the invention is as follows: the stock includes direction stock and extension stock, the spiral anchor dish is established on the direction stock, direction stock and extension stock accessible articulate, the spiral card section of thick bamboo is established on the extension stock. The leading-in of screw anchor during rotatory construction and as the main atress part of screw anchor are guaranteed to the direction stock, and the extension stock mainly is used in when the direction stock can not satisfy shaft tower atress requirement, extension screw anchor to increase the buried depth of screw anchor piece.
The technical scheme of the invention is as follows: the diameter, the rotation direction and the screw pitch of the spiral anchor disk, the spiral anchor disk on the clamping cylinder and the spiral anchor disk under the clamping cylinder are the same, and the distance between the spiral anchor disk on the clamping cylinder and the spiral anchor disk under the clamping cylinder is integral multiple of the screw pitch of the spiral anchor disk. By adopting the technical scheme, the walking tracks of the spiral anchor plate, the upper spiral anchor plate of the clamping cylinder and the lower spiral anchor plate of the clamping cylinder are consistent, the disturbance of the spiral anchor to soil is reduced, the original soil is kept as much as possible, and the strength of a soil body structure is fully utilized.
The technical scheme of the invention is as follows: the diameter of the cylinder body is not less than 2.5 times of the diameter of the anchor rod.
The invention also provides a spiral clamping cylinder which comprises an upper spiral anchor disc of the clamping cylinder, a lower spiral anchor disc of the clamping cylinder and a cylinder body, wherein the upper spiral anchor disc of the clamping cylinder, the lower spiral anchor disc of the clamping cylinder and the cylinder body are coaxial, two ends of the cylinder body are respectively fixedly connected with the upper spiral anchor disc of the clamping cylinder and the lower spiral anchor disc of the clamping cylinder, a soil outlet is arranged on the upper spiral anchor disc of the clamping cylinder, and a soil inlet is arranged on the lower spiral anchor disc of the clamping cylinder.
Compared with the prior art, the spiral clamping cylinder type composite spiral anchor has the beneficial effects that: (1) the diameter of the cylinder body is larger than that of the anchor rod, so that the rigidity of the screw anchor and the contact area of the screw anchor and soil can be increased, and the horizontal force bearing capacity of the screw anchor is improved; (2) during construction, soil enters the barrel from the soil inlet under the action of the spiral anchor disk under the clamping barrel, and is discharged out of the barrel from the soil outlet under the action of the spiral anchor disk on the clamping barrel, so that the disturbance to the soil is small during construction, the strength of a soil body structure can be fully utilized, the bearing capacity of a spiral anchor foundation is improved, secondary excavation is not needed, and time and labor are saved; (3) the soil entering the cylinder can improve the rigidity of the cylinder, so that the wall thickness of the cylinder can be reduced to a certain extent, and the manufacturing cost of the spiral anchor is reduced; (4) the bearing capacity of the spiral anchor can be ensured by burying the spiral clamping cylinder below the soil frozen soil layer, so that the diameter of the anchor rod does not need to be increased integrally, and the economical efficiency of the spiral anchor is ensured; (5) for the mode that sets up oblique screw anchor, the spiral card section of thick bamboo is less to the destruction of underground vegetation, can reduce the harmful effects of construction to the environment.
Drawings
Fig. 1 is a schematic structural view of a screw cartridge type composite screw anchor according to an embodiment.
FIG. 2 is a perspective view of a screw cartridge type composite screw anchor according to one embodiment.
FIG. 3 is a perspective view of a spiral clamping cylinder according to a first embodiment.
Fig. 4 is a schematic structural view of a screw cartridge type composite screw anchor according to a second embodiment.
Fig. 5 is a QS curve for a screw cartridge type composite screw anchor in the third embodiment.
Fig. 6 is a QS curve of the general screw anchor in the comparative example.
In the figure: 1. spiral anchor plate, 2, card section of thick bamboo upper spiral anchor plate, 3, card section of thick bamboo lower spiral anchor plate, 4, barrel, 5, soil export, 6, soil import, 7, direction stock, 8, extension stock, 9, joint.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the following further describes the embodiments of the present invention with reference to the attached drawings.
Example one
As shown in fig. 1-3, a spiral clamping cylinder type composite spiral anchor comprises an anchor rod, a spiral anchor disc 1 and a spiral clamping cylinder. The stock includes direction stock 7, and spiral anchor disc 1 is established on direction stock 7, and the diameter of direction stock 7 is 219 mm.
The spiral clamping cylinder comprises an upper spiral anchor disc 2 of the clamping cylinder, a lower spiral anchor disc 3 of the clamping cylinder and a cylinder body 4. Spiral anchor plate 2 on the card section of thick bamboo and card section of thick bamboo spiral anchor plate 3 interval set firmly on direction stock 7, and spiral anchor plate 2 on the card section of thick bamboo and card section of thick bamboo spiral anchor plate 3 down all are coaxial with direction stock 7, and spiral anchor plate 2 is apart from the top 1000mm of direction stock 7 on the card section of thick bamboo. The diameter of spiral anchor plate 1, spiral anchor plate 2 on the card section of thick bamboo and spiral anchor plate 3 under the card section of thick bamboo is 890mm, spiral anchor plate 1, spiral anchor plate 2 on the card section of thick bamboo and the turning and the pitch of spiral anchor plate 3 are all the same under the card section of thick bamboo, the interval of spiral anchor plate 8 on the card section of thick bamboo and spiral anchor plate 9 under the card section of thick bamboo is the integral multiple of spiral anchor plate pitch 1, can guarantee that the walking orbit of spiral anchor plate 1, spiral anchor plate 2 on the card section of thick bamboo and spiral anchor plate 3 under the card section of thick bamboo is unanimous, reduce the disturbance of spiral anchor to soil, keep original state soil as far as possible, make full use of the intensity of soil body.
The barrel 4 is coaxially sleeved outside the guide anchor rod 7, two ends of the barrel are fixedly connected with the clamping barrel upper spiral anchor disc 2 and the clamping barrel lower spiral anchor disc 3 respectively, and the diameter of the barrel 4 is 800 mm. The upper spiral anchor disk 2 of the clamping cylinder is provided with a soil outlet 5, and the lower spiral anchor disk 3 of the clamping cylinder is provided with a soil inlet 6.
The material of the spiral clamping cylinder type composite spiral anchor is Q345.
During construction, the spiral anchor plate 2 on the clamping cylinder and the spiral anchor plate 3 under the clamping cylinder ensure the screwing force of the spiral clamping cylinder, so that the spiral clamping cylinder type composite spiral anchor is easy to drill into soil. Under the action of the spiral anchor disk 3 under the clamping cylinder, soil enters the cylinder body 4 from the soil inlet 6, and under the action of the spiral anchor disk 2 on the clamping cylinder, the soil is discharged out of the cylinder body 4 from the soil outlet 7. In addition, the soil entering the cylinder 4 can increase the rigidity of the cylinder 4, so that the wall thickness of the cylinder can be reduced to some extent to reduce the manufacturing cost of the screw anchor. After the construction is finished, the diameter of the cylinder body 4 is larger than that of the guide anchor rod 7, so that the rigidity of the spiral anchor and the contact area of the spiral anchor and soil can be increased, and the horizontal force bearing capacity of the spiral anchor is improved.
Example two
As shown in fig. 4, unlike the first embodiment, the bolt of the screw cartridge type composite screw anchor in the present embodiment includes a guide bolt 7 and an extension bolt 8, the screw anchor plate 1 is disposed on the guide bolt 7, and the guide bolt 7 and the extension bolt 8 can be connected by a joint 9. The spiral clamping cylinder is arranged on the extension anchor rod 8, and the distance between the spiral anchor disc 2 on the clamping cylinder and the top end of the extension anchor rod 8 is 1000 mm.
The extension anchor rod 8 is mainly used for lengthening the spiral anchor when the guide anchor rod 7 cannot meet the stress requirement of the tower, so that the burial depth of the spiral anchor sheet 1 is increased.
EXAMPLE III
Different from the second embodiment, the diameter of the anchor rod of the spiral clamping cylinder type composite spiral anchor in the second embodiment is 140mm, and the wall thickness is 13 mm; the number of the spiral anchor disks 2 is three, the diameter is 500mm, the thickness is 16mm, and the distance between the spiral anchor disks 2 is 1824 mm; the diameters of the upper spiral anchor plate 2 of the clamping cylinder and the lower spiral anchor plate of the clamping cylinder are 500mm, the distance between the upper spiral anchor plate 2 of the clamping cylinder and the top end of the anchor rod is 1000mm, and the thickness is 16 mm; the diameter of the cylinder 4 is 400mm, the wall thickness is 10mm, and the length is 1000 mm.
Comparative example
Different from the third embodiment, the comparative example is a common screw anchor without a screw clamping cylinder, and other parameters are consistent with the third embodiment.
Examples of the experiments
The screw clamping cylinder type composite screw anchor in the third embodiment and the common screw anchor in the comparative example are respectively drilled into silty clay (Q3al + pl), the inclination angle is 0 degrees, the axial burial depth of the anchor rod is 11700mm, and the test working condition is transverse.
In fig. 5 and 6, the abscissa is the force applied to the screw clamping cylinder type composite screw anchor or the ordinary screw anchor, and the ordinate is the horizontal displacement of the screw clamping cylinder type composite screw anchor or the ordinary screw anchor, and it can be known from the solid lines in fig. 4 and 5 that the horizontal displacement of the screw clamping cylinder type composite screw anchor relative to the ordinary screw anchor is obviously reduced under the same stress condition.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (6)
1. The utility model provides a compound spiral anchor of spiral card cylinder, includes stock and spiral anchor dish (1), spiral anchor dish (1) is coaxial to be set firmly on the stock, its characterized in that: still include a spiral card section of thick bamboo, a spiral card section of thick bamboo fixed mounting is on the stock, a spiral card section of thick bamboo is including a card section of thick bamboo upper spiral anchor dish (2), spiral anchor dish (3) and barrel (4) under the card section of thick bamboo, barrel (4) coaxial cover is established in the stock outside and its both ends respectively with a card section of thick bamboo upper spiral anchor dish (2) and a card section of thick bamboo under spiral anchor dish (3) fixed connection, be equipped with soil outlet (5) on a card section of thick bamboo upper spiral anchor dish (2), be equipped with soil inlet (6) on a card section of thick bamboo lower spiral anchor dish (3).
2. The spiral cartridge compound screw anchor of claim 1, wherein: the diameters of the upper spiral anchor disk (2) of the clamping cylinder and the lower spiral anchor disk (3) of the clamping cylinder are larger than that of the cylinder body (4).
3. The spiral cartridge compound screw anchor of claim 1, wherein: the stock includes direction stock (7) and extension stock (8), spiral anchor plate (1) is established on direction stock (7), direction stock (7) are connected with extension stock (8) accessible joint (9), the spiral card section of thick bamboo is established on extension stock (8).
4. A helical cartridge type composite screw anchor according to any one of claims 1 to 3, wherein: the diameter, the turning direction and the thread pitch of the spiral anchor disk (1), the spiral anchor disk (8) on the clamping cylinder and the spiral anchor disk (9) under the clamping cylinder are all the same, and the distance between the spiral anchor disk (8) on the clamping cylinder and the spiral anchor disk (9) under the clamping cylinder is integral multiple of the thread pitch (1) of the spiral anchor disk.
5. A helical cartridge type composite screw anchor according to any one of claims 1 to 3, wherein: the diameter of the cylinder (4) is not less than 2.5 times of the diameter of the anchor rod.
6. A spiral card section of thick bamboo which characterized in that: spiral anchor plate (3) and barrel (4) under spiral anchor plate (2), the card section of thick bamboo on the card section of thick bamboo, spiral anchor plate (3) and barrel (4) are coaxial under the card section of thick bamboo goes up spiral anchor plate (2), the card section of thick bamboo, the both ends of barrel (4) respectively with card section of thick bamboo on spiral anchor plate (2) and card section of thick bamboo spiral anchor plate (3) fixed connection down, be equipped with soil outlet (5) on the card section of thick bamboo on spiral anchor plate (2), be equipped with soil inlet (6) on the card section of thick bamboo spiral anchor plate (3) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911031387.6A CN110700256B (en) | 2019-10-28 | 2019-10-28 | Spiral clamping cylinder type composite spiral anchor and spiral clamping cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911031387.6A CN110700256B (en) | 2019-10-28 | 2019-10-28 | Spiral clamping cylinder type composite spiral anchor and spiral clamping cylinder |
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| CN110700256A true CN110700256A (en) | 2020-01-17 |
| CN110700256B CN110700256B (en) | 2021-03-09 |
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| CN201911031387.6A Active CN110700256B (en) | 2019-10-28 | 2019-10-28 | Spiral clamping cylinder type composite spiral anchor and spiral clamping cylinder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733811A (en) * | 2020-08-07 | 2020-10-02 | 辽宁沈通电力桩基础研发有限公司 | Long and short screw anchor |
| CN113969799A (en) * | 2021-12-06 | 2022-01-25 | 辽宁沈通电力桩基础研发有限公司 | Long and short spiral anchor |
| CN113982029A (en) * | 2021-12-02 | 2022-01-28 | 中国能源建设集团辽宁电力勘测设计院有限公司 | Assembly combined spiral anchor foundation and construction method thereof |
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| JP2013079516A (en) * | 2011-10-04 | 2013-05-02 | Maruden-Kogyo Co Ltd | Frame base |
| CN206956701U (en) * | 2017-07-25 | 2018-02-02 | 中铁上海工程局集团有限公司 | One kind penetrates layer of sand drawing out soil equipment |
| CN207775875U (en) * | 2017-12-20 | 2018-08-28 | 中国二冶集团有限公司 | Rod of soil nailing wall end reinforces sleeve |
| CN207812477U (en) * | 2017-12-01 | 2018-09-04 | 绍兴大明电力设计院有限公司 | Composite screw anchor foundation |
| KR101920878B1 (en) * | 2017-02-21 | 2018-11-22 | 반석기초이앤씨(주) | Double anchor for slope |
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2019
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013079516A (en) * | 2011-10-04 | 2013-05-02 | Maruden-Kogyo Co Ltd | Frame base |
| KR101920878B1 (en) * | 2017-02-21 | 2018-11-22 | 반석기초이앤씨(주) | Double anchor for slope |
| CN206956701U (en) * | 2017-07-25 | 2018-02-02 | 中铁上海工程局集团有限公司 | One kind penetrates layer of sand drawing out soil equipment |
| CN207812477U (en) * | 2017-12-01 | 2018-09-04 | 绍兴大明电力设计院有限公司 | Composite screw anchor foundation |
| CN207775875U (en) * | 2017-12-20 | 2018-08-28 | 中国二冶集团有限公司 | Rod of soil nailing wall end reinforces sleeve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733811A (en) * | 2020-08-07 | 2020-10-02 | 辽宁沈通电力桩基础研发有限公司 | Long and short screw anchor |
| CN113982029A (en) * | 2021-12-02 | 2022-01-28 | 中国能源建设集团辽宁电力勘测设计院有限公司 | Assembly combined spiral anchor foundation and construction method thereof |
| CN113969799A (en) * | 2021-12-06 | 2022-01-25 | 辽宁沈通电力桩基础研发有限公司 | Long and short spiral anchor |
| CN113969799B (en) * | 2021-12-06 | 2023-12-22 | 辽宁沈通电力桩基础研发有限公司 | Long and short spiral anchor |
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