Screw anchor foundation
By adding pull-out plates and reinforcing plates to the spiral anchor foundation, the problem of insufficient pull-out bearing capacity of the spiral anchor foundation in soft soil and river network swamp areas was solved, thereby improving the pull-out capacity and reducing construction costs.
Patent Information
- Application Number
- CN202423265558.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In soft soil and river network swamp areas, the uplift bearing capacity of helical anchor foundations is insufficient, leading to an increase in concrete usage and making it difficult to meet the foundation requirements of towers with large spans or large turns.
Adding pull-out plates and reinforcing plates to the helical anchor foundation, and tightly connecting them with the helical anchor through grouting material, improves pull-out resistance, and enhances overall stability by connecting steel plates and bolts.
It improves the pull-out resistance of the spiral anchor foundation, reduces the amount of concrete used, lowers construction costs, shortens the construction period, and meets the load-bearing requirements of towers with large spans or large angles.
Smart Images
Figure CN223793617U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screw anchor technology field especially relates to a screw anchor foundation. BACKGROUND
[0002] The disclosure of this Background section is for the purpose of providing background information to the present application and does not constitute an admission as prior art against this application.
[0003] Foundation is an important part of transmission line, to ensure its construction safety, reduce construction cost, shorten construction period, increase its economy is the inevitable trend of development of transmission line; Consideration of economy, safety, environmental protection and water conservation and many other factors, under different conditions, the selection of appropriate foundation type has important significance.
[0004] Screw anchor foundation is a widely used foundation type, has been widely used in the overseas engineering guy foundation. Construction through the anchor rod to apply torque, will screw anchor plate to screw into the deep soil, do not need to excavate foundation pit in a large range, the disturbance to the soil is small, can give full play to the inherent strength of the undisturbed soil, improve the bearing capacity. In soft soil and river network swamp area, screw anchor foundation can give full play to its advantages, economic benefit is obvious.
[0005] The foundation force of large span or large angle tower is obviously larger than that of conventional tower foundation, when the foundation is located in river network swamp area, generally adopt multi-pile pile cap foundation. In order to meet the bearing capacity requirement, generally adopt the way of increasing pile diameter, pile length or pile number. No matter which way is adopted, the amount of pile and pile cap concrete will increase significantly. Generally speaking, the concrete consumption of single foundation of large span transmission tower can reach more than one thousand square meters. Here we assume that the tower site geological condition is good, the soil layer below is stable rock, the soil layer is thin, the pile can be supported on rock foundation, the downward bearing capacity is easy to meet, the upward bearing capacity is difficult to meet. CONTENT OF THE UTILITY MODEL
[0006] The utility model provides a screw anchor foundation.
[0007] In order to realize the above object, the utility model adopts the following technical scheme:
[0008] A spiral anchor foundation, comprising a base, a plurality of spiral anchors are installed on the base, the spiral anchor comprises a rod body, a prefabricated part is sleeved on the rod body, the prefabricated part is provided with a mounting hole one in the center, a bottom plate is fixed on the rod body, a pull-out prevention plate one and a pull-out prevention plate two are fixed on the rod body and above the bottom plate, the bottom plate is a circular plate, the diameter D1 of the circular plate is equal to the diameter D2 of the mounting hole one, the pull-out prevention plate one and the pull-out prevention plate two are both circular plates, the diameter D3 of the pull-out prevention plate one is not greater than the diameter D2 of the mounting hole one, the diameter D4 of the pull-out prevention plate two is not greater than the diameter D2 of the mounting hole one, and grouting material is arranged in the gap between the spiral anchor and the mounting hole one of the prefabricated part.
[0009] Further, when the diameter D3 of the pull-out prevention plate one and the diameter D4 of the pull-out prevention plate two are both equal to the diameter D2 of the mounting plate one, a communication hole one is arranged on the pull-out prevention plate one, and a communication hole two is arranged on the pull-out prevention plate two.
[0010] Further, when the diameter D3 of the pull-out prevention plate one and the diameter D4 of the pull-out prevention plate two are both smaller than the diameter D2 of the mounting plate one, the pull-out prevention plate one and the pull-out prevention plate two are both closed circular plates.
[0011] Further, a plurality of connecting hole groups are arranged on the base, each connecting hole group is connected with the spiral anchor through a connecting steel plate, a plurality of connecting hole twos are arranged on the connecting steel plate, a screw rod is arranged in each connecting hole two and the corresponding connecting hole group, the upper end of the screw rod is used for pressing the connecting steel plate on the upper end of the base through a nut, the upper end of the spiral anchor is provided with a joint, a plurality of circular holes three are arranged on the joint, the lower end of the screw rod is inserted into the circular hole three, and the joint of the spiral anchor is pressed on the lower end of the base through a nut.
[0012] Further, a plurality of spiral parts are fixed on the rod body and arranged in equidistant linear array.
[0013] Further, a plurality of reinforcing plates are fixed between the rod body and the joint.
[0014] Further, two pull-out prevention plates one and two pull-out prevention plates two are arranged, and the two pull-out prevention plates one and the two pull-out prevention plates two are arranged alternately.
[0015] Further, the distance L1 from the bottom plate to the uppermost pull-out prevention plate two is smaller than the thickness of the prefabricated part.
[0016] Further, the prefabricated part comprises a body one, the body one is provided with a mounting hole one in the center, and a plurality of connecting steel bars are arranged in the body one.
[0017] Beneficial effects: the pull-out prevention plate is installed on the spiral anchor, and the pull-out resistance of the spiral anchor is further improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a structural schematic view of the prior art of the utility model;
[0019] Figure 2 is a structural schematic view of the utility model;
[0020] Figure 3 is a top view of the base in the utility model;
[0021] Figure 4 is a top view of the connecting steel plate in the utility model;
[0022] Figure 5 is a top view of the prefabricated part in the utility model;
[0023] Figure 6 is a perspective view of the prefabricated part and the spiral anchor when connected in the utility model;
[0024] Figure 7 is a front view of the utility model Figure 6 ;
[0025] Figure 8 is a sectional view of A-A in the utility model Figure 7 ;
[0026] Figure 9 is a perspective view of the spiral anchor in the utility model;
[0027] Figure 10 is an enlarged view of the upper part of the spiral anchor in the utility model.
[0028] In the drawings, 1 is a main pile, 2 is a base, 3 is a connecting steel plate, 4 is a screw rod, 5 is a nut, 6 is a prefabricated part, and 7 is a spiral anchor.
[0029] 201 is a base body, and 202 is a connecting hole group.
[0030] 301 is a plate body one, and 302 is a connecting hole two.
[0031] 601 is a body one, 602 is a mounting hole one, and 603 is a connecting steel bar.
[0032] 701 is a rod body, 702 is a joint, 703 is a reinforcing plate, 704 is a spiral part, 705 is a bottom plate, 706 is a pullout-resistant plate one, 70601 is a communication hole one, 70701 is a communication hole two, and 707 is a pullout-resistant plate two. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.
[0034] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0035] Referring to Figures 1-10 The utility model discloses a spiral anchor foundation, including base 2, the main stake 1 is installed on the upper portion of base 2, a plurality of spiral anchors 7 are installed on base 2, the spiral anchor 7 includes the stem 701, the stem 701 is sleeved with prefabricated part 6, the center of prefabricated part 6 is provided with mounting hole one 602, the stem 701 is fixed with bottom plate 705, the stem 701 and the upper side of bottom plate 705 are fixed with anti -pulling board one 706 and anti -pulling board two 707, the bottom plate 705 is round plate, the diameter D1 of round plate is equal to the diameter D2 of mounting hole one 602, anti -pulling board one 706 and anti -pulling board two 707 are all round plate, the diameter D3 of anti -pulling board one 706 is not greater than the diameter D2 of mounting hole one 602, the diameter D4 of anti -pulling board two 707 is not greater than the diameter D2 of mounting hole one 602, the gap between spiral anchor 7 and the mounting hole one 602 of prefabricated part 6 is provided with grouting material.
[0036] The utility model provides an embodiment, when the diameter D3 of anti -pulling board one 706 and the diameter D4 of anti -pulling board two 707 are equal to the diameter D2 of mounting plate one, be provided with intercommunication hole one 70601 on anti -pulling board one 706, be provided with intercommunication hole two 70701 on anti -pulling board two 707, in vertical direction, intercommunication hole one 70601 and intercommunication hole two 70701 staggered arrangement, when grouting grouting material, bottom plate 705 prevents grouting material from leaking from the bottom of the mounting hole of prefabricated part 6, and grouting material pours into the upper portion of the mounting hole, and at this time, grouting material falls in intercommunication hole two 70701 of anti -pulling board two 707 and intercommunication hole one 70601 of anti -pulling board one 706 from the gap in mounting hole one 602 and fills the gap in mounting hole one 602.
[0037] The utility model provides another embodiment, referring to Figure 8 When the diameter D3 of anti -pulling board one 706 and the diameter D4 of anti -pulling board two 707 are less than the diameter D2 of mounting plate one, anti -pulling board one 706 and anti -pulling board two 707 are all closed round plate, at this time, grouting grouting material, bottom plate 705 prevents grouting material from leaking from the bottom of the mounting hole of prefabricated part 6, and grouting material pours into the upper portion of the mounting hole, and at this time, grouting material falls in the gap between anti -pulling board two 707 and mounting hole one 602, the gap between anti -pulling board one 706 and mounting hole one 602 and fills the gap in mounting hole one 602.
[0038] Referring to Figure 3 , the base 2 comprises a base body 201, the base body 201 is provided with a plurality of connecting hole groups 202, each connecting hole group 202 comprises four connecting holes, each connecting hole group 202 is connected with a screw anchor 7 through a connecting steel plate 3, referring to Figure 4 , the connecting steel plate 3 comprises a plate body 301, the plate body 301 is provided with a plurality of connecting holes 302, the connecting holes 302 are provided with four connecting holes, four connecting holes and four connecting holes 302 one by one, the connecting holes 302 and the connecting hole groups 202 corresponding to them are provided with a screw 4, the upper end of the screw 4 is pressed on the upper end of the base 2 through a nut 5, the upper end of the screw anchor 7 is provided with a joint 702, the joint 702 is provided with a plurality of round holes, the round holes are provided with four, four round holes and four connecting holes are set one by one, the lower end of the screw 4 is inserted into the round hole, the lower end of the screw 4 is pressed on the lower end of the base 2 through the nut 5. A plurality of spiral parts 704 are fixed on the rod body 701, the spiral parts 704 are linearly arrayed at equal distances on the rod body 701. A plurality of reinforcing plates 703 are fixed between the rod body 701 and the joint 702. The two anti-pulling plates one 706 and the two anti-pulling plates two 707 are staggered. The distance L1 from the bottom plate 705 to the uppermost anti-pulling plate two 707 is less than the thickness of the prefabricated part 6.
[0039] Referring to Figure 5 , the prefabricated part 6 comprises a body 601, the body 601 is provided with a mounting hole 602 in the center, and a plurality of connecting steel bars 603 are arranged in the body 601.
[0040] In use, the connecting steel plate 3 is placed on the connecting hole group 202 of the base 2, the screw 4 is inserted into the connecting hole two 302 of the connecting steel plate 3 and the connecting hole one of the connecting hole group 202 concentric with the connecting hole two 302, and the nut 5 is arranged at the end of the screw 4, so that the nut 5 is in contact with the connecting steel plate 3, the other end of the screw 4 extends out of the lower end of the base 2, then the round hole three on the joint 702 of the screw anchor 7 is sleeved on the screw 4, the joint 702 is pressed on the lower end of the base 2 through the nut 5, and the nuts 5 at both ends are tightened to meet the requirement of pulling force, the screw anchor 7 is connected with the prefabricated part 6, the mounting hole one 602 and the joint 702 of the screw anchor 7 are connected with high-strength concrete grouting material, which can reach C60 strength in 24 hours, and is tightly connected with the screw anchor 7 to resist horizontal force, so that the foundation is more stable, and the anti-pulling capacity of the screw anchor 7 is further improved through the anti-pulling plate one 706 and the anti-pulling plate two 707 on the rod body 701.
[0041] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A spiral anchor foundation, comprising a base, wherein a plurality of spiral anchors are mounted on the base, each spiral anchor comprising a rod, wherein a prefabricated component is fitted onto the rod, and the prefabricated component has a central mounting hole, characterized in that: The rod body is fixed with a bottom plate, the rod body and the bottom plate are fixed with anti-pulling plate one and anti-pulling plate two, the bottom plate is a circular plate, the diameter D1 of the circular plate is equal to the diameter D2 of the mounting hole one, the anti-pulling plate one and the anti-pulling plate two are both circular plates, the diameter D3 of the anti-pulling plate one is not greater than the diameter D2 of the mounting hole one, the diameter D4 of the anti-pulling plate two is not greater than the diameter D2 of the mounting hole one, and the gap between the spiral anchor and the mounting hole one of the prefabricated part is provided with grouting material.
2. A screw anchor foundation according to claim 1, characterised in that When the diameter D3 of the anti-pulling plate one and the diameter D4 of the anti-pulling plate two are equal to the diameter D2 of the mounting plate one, the anti-pulling plate one is provided with a communication hole one, and the anti-pulling plate two is provided with a communication hole two.
3. A screw anchor foundation according to claim 1, wherein When the diameter D3 of the anti-pulling plate one and the diameter D4 of the anti-pulling plate two are less than the diameter D2 of the mounting plate one, the anti-pulling plate one and the anti-pulling plate two are both closed circular plates.
4. A screw anchor foundation according to claim 1, wherein The base is provided with a plurality of connecting hole groups, each connecting hole group is connected with the spiral anchor through a connecting steel plate, the connecting steel plate is provided with a plurality of connecting holes two, the connecting hole two is provided with a screw rod in the corresponding connecting hole group, the upper end of the screw rod is pressed on the upper end of the base through a nut, the upper end of the spiral anchor is provided with a connector, the connector is provided with a plurality of round holes three, the lower end of the screw rod is inserted into the round hole three, and the lower end of the screw rod is pressed on the lower end of the base through a nut.
5. A screw anchor foundation according to claim 1, wherein The rod body is fixed with a plurality of spiral parts, and the spiral parts are linearly arranged at equal distances on the rod body.
6. A screw anchor foundation according to claim 4, wherein The rod body and the connector are fixed with a plurality of reinforcing plates.
7. A screw anchor foundation according to claim 1, wherein The anti-pulling plate one and the anti-pulling plate two are both provided with two, and the two anti-pulling plate one and the two anti-pulling plate two are staggered.
8. A screw anchor foundation according to claim 1, wherein The distance L1 from the bottom plate to the uppermost anti-pulling plate two is less than the thickness of the prefabricated part.
9. A screw anchor foundation according to claim 1, wherein The prefabricated part comprises a body one, the body one is provided with a mounting hole one in the center, and the body one is provided with a plurality of connecting steel bars.