A prestressed anchor cable tensioning and positioning structure for anchored piles

Abstract

This utility model belongs to the field of support and discloses a prestressed anchor cable tensioning and positioning structure for anchored piles. It is installed inside a square pile and includes embedded parts, a steel pipe, a tensioning base, and spiral reinforcing bars. The tensioning base has grouting holes and a positioning structure on its flange. A variable-diameter bearing platform is also included, with an anchor installed at one end. By anchoring the steel pipe and tensioning base inside the square pile, subsequent installation and positioning of the tensioning base is unnecessary. The tensioning base and steel pipe can jointly guide and limit the drilling. When tensioning is required, the variable-diameter bearing platform is installed through the positioning structure, which can centrally restrict the position of the anchor cable. It also allows the anchor installation position to be moved from the inside of the square pile to a position outside the pile where tensioning can be easily performed using a limiting plate and jacks. Furthermore, the force during tensioning can be transmitted to the tensioning base through the variable-diameter bearing platform, thus ensuring that the variable-diameter bearing platform does not alter the original pressure-bearing structure.

Description

Technical Field

[0001] This utility model belongs to the field of support technology, specifically relating to a prestressed anchor cable tensioning and positioning structure for anchor piles. Background Technology

[0002] Prestressed anchor cables consist of an anchor head, high-strength steel wire or high-strength steel strand, and anchoring components. They are anchoring structures that provide active support resistance to the anchored solid by applying prestress to the high-strength steel wire or steel strand.

[0003] Existing anchor cable pedestals (such as bridge anchor cable pedestals) require drilling holes for the anchor piles during installation. The diameter of the drilled holes is much larger than that of the anchors. Therefore, it is impossible to drill holes for the anchor cable pedestals before drilling. Furthermore, if the anchor cable pedestals are installed after drilling, the drilled holes need to be converted to reinforced concrete, which is very difficult. Therefore, ordinary anchor cable pedestals cannot be used for anchor piles.

[0004] Traditional anchor pile anchor platforms mainly come in two forms. The first involves pre-embedding pipes to form holes, then pouring concrete to form the platform after anchoring. The second involves pre-embedding pipes and vertical steel plates to form holes, then stacking multiple layers of steel plates to form the platform after anchoring. The first method suffers from technical drawbacks in the complexity of the concrete base pouring process, difficulty in controlling the quality of small sections of concrete pouring, and long construction time. The second method suffers from technical drawbacks in the structural load transfer of the steel plate structure when dealing with large-tonnage anchor cables, which can easily lead to insufficient local bearing capacity of the concrete. Utility Model Content

[0005] The present invention aims to provide a prestressed anchor cable tensioning and positioning structure for anchored piles, so that it has a platform that can meet the dual requirements of drilling and tensioning, and at the same time, its force-bearing and force-transferring structure is reliable.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a prestressed anchor cable tensioning and positioning structure for anchored piles, installed inside a square pile, comprising...

[0007] The embedded parts include a steel pipe, a tensioning base, and a spiral reinforcement installed at an angle inside the square pile. The tensioning base is installed above the steel pipe, and the spiral reinforcement is sleeved on the outside of the tensioning base. The wing plate of the tensioning base has grouting holes and a positioning structure.

[0008] The variable diameter bearing platform is connected to the tensioning base through a positioning structure, and an anchor is installed at the end of the variable diameter bearing platform away from the tensioning base.

[0009] The principle and effect of this technical solution are as follows: By directly anchoring the steel pipe and tensioning base inside the square pile, there is no need for subsequent installation and positioning of the tensioning base. The tensioning base and steel pipe can jointly guide and limit the drilling. When tensioning is required, the variable diameter bearing platform is installed through the positioning structure, which can center and limit the position of the anchor cable. At the same time, the installation position of the anchor can be moved from the inside of the square column to the outside of the square pile, making it easy to use the limiting plate and jack for tensioning. The force during tensioning can be transmitted to the tensioning base through the variable diameter bearing platform, so that the setting of the variable diameter bearing platform does not change the original pressure bearing structure.

[0010] The present invention is further configured such that: the variable diameter bearing platform has a truncated cone-shaped variable diameter section, and the axial length of the variable diameter bearing platform is not less than 130mm.

[0011] The principle and effect of this technical solution: The truncated cone-shaped variable diameter bearing platform can transmit force well and has a stronger ability to withstand lateral pressure. Its length of not less than 130mm allows it to reserve sufficient space for the placement of jacks during tensioning operations.

[0012] The present invention is further configured such that: a sink groove is provided in the middle of the side of the variable diameter bearing platform away from the tensioning base, and the anchor is installed in the sink groove, wherein the outer diameter of the anchor is not greater than the inner diameter of the sink groove.

[0013] The principle and effect of this technical solution: By limiting the anchorage through the sinking channel, the anchorage will not be misaligned relative to the variable diameter bearing platform, thus ensuring the positional accuracy of the anchorage. Furthermore, the abutment restriction of the sinking channel steps allows the variable diameter bearing platform to be used for installation and positioning even if the outer diameter of the anchorage is one level lower than that of the sinking channel, making it more versatile.

[0014] The present invention is further configured such that: the positioning structure includes a positioning ring, the positioning ring is fixed to the side of the wing plate near the variable diameter bearing platform, the end of the variable diameter bearing platform is slidably engaged with the positioning ring, and the variable diameter bearing platform abuts against the wing plate.

[0015] The principle and effect of this technical solution: By setting the positioning ring, the variable diameter bearing platform can slide and cooperate with the inside of the positioning ring through a sliding insertion method, so that the internal cavity of the variable diameter bearing platform corresponds to the internal cavity of the tensioning base.

[0016] The present invention is further configured such that: the square pile includes a pile retaining wall and pile body reinforcement located inside the pile retaining wall, and the wing plate is located outside the pile body reinforcement.

[0017] The principle and effect of this technical solution: By positioning the wing plate outside the pile reinforcement, it is ensured that the setting of the tensioning base will not damage the casting strength of the square pile.

[0018] The present invention is further configured such that: two opposite inner walls on the inner side of the pile retaining wall are respectively provided with retaining wall pits, the end of the steel pipe is inserted into the retaining wall pit on one side, and the wing plate is installed in the retaining wall pit on the other side.

[0019] The principle and effect of this technical solution: The setting of pits in the protective wall on one side can restrict the position of the steel pipe, and the setting of pits in the protective wall on the other side can restrict the position of the wing plate, so that the wing plate is stably set in the square pile. The setting of pits in the protective walls on both sides can prevent the device from being misaligned during the subsequent pouring of the square pile.

[0020] The present invention is further configured such that: the outer side of the tensioning base has reinforcing ribs, and the reinforcing ribs are located on the side of the tensioning base away from the grouting hole.

[0021] The principle and effect of this technical solution: The addition of reinforcing ribs can enhance the compressive strength of the flange. Attached Figure Description

[0022] Figure 1 This is the front view of the present invention;

[0023] Figure 2 for Figure 1 Structural diagram of the Chinese pile location;

[0024] Figure 3 for Figure 1 A partial exploded structure diagram;

[0025] Figure 4 for Figure 3 Enlarged view of the pressure plate at the intermediate diameter change point;

[0026] Figure 5 for Figure 3 Enlarged view of the tensioning base. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0028] The reference numerals in the accompanying drawings include:

[0029] 110. Pile retaining wall; 111. Piling pit for retaining wall; 120. Pile reinforcement;

[0030] 210. Steel pipe; 220. Tensioning base; 221. Wing plate; 222. Grouting hole; 223. Positioning ring; 230. Spiral reinforcing bar;

[0031] 310. Variable diameter bearing platform; 311. Settlement channel; 320. Anchorage;

[0032] 410. Steel stranded rope.

[0033] Example:

[0034] As attached Figure 1-5 As shown, this utility model discloses a prestressed anchor cable tensioning and positioning structure for anchored piles, which is set inside a square pile and includes embedded parts and a variable diameter bearing platform 310. The square pile includes a pile retaining wall 110 and pile body steel bars 120 located inside the pile retaining wall 110. The two opposite inner walls of the pile retaining wall 110 are respectively provided with retaining wall pits 111.

[0035] The embedded components include a steel pipe 210, a tensioning base 220, and a spiral reinforcing bar 230, all installed at an angle within the square pile. The tensioning base 220 is installed above the steel pipe 210, and the spiral reinforcing bar 230 is fitted onto the outer side of the tensioning base 220. The wing plate 221 of the tensioning base 220 has grouting holes 222 and a positioning structure. The wing plate 221 is located outside the pile reinforcing bar 120 and inside the pile retaining wall 110. The end of the steel pipe 210 is inserted into a retaining wall pit 111 on one side (the pile retaining wall 110 has a retaining wall pit 111 that matches the shape of the end of the steel pipe 210), and the wing plate 221 is installed into a retaining wall pit 111 on the other side. The specific shape is shown in the attached figure. Figure 2 As shown, the wing plate 221 abuts against the wall groove 111. The wall groove 111 on both sides limits the position of the embedded part as a whole, so that the position of the embedded part of the square pile cannot change before pouring and the position can remain stable during pouring.

[0036] The positioning structure includes a positioning ring 223, which is fixed to the side of the wing plate 221 near the variable diameter bearing platform 310. The end of the variable diameter bearing platform 310 is slidably engaged with the positioning ring 223, and the variable diameter bearing platform 310 abuts against the wing plate 221. The outer side of the tensioning base 220 has reinforcing ribs, which are located on the side of the tensioning base 220 away from the grouting hole 222.

[0037] The variable diameter bearing platform 310 has a variable diameter section in the shape of a frustum cone, and the axial length of the variable diameter bearing platform 310 is not less than 130mm, specifically 150mm in this scheme. The width of the square pile should not be less than 1m. A sinkhole 311 is opened in the middle of the side of the variable diameter bearing platform 310 away from the tensioning base 220. The anchor 320 is installed in the sinkhole 311, and the outer diameter of the anchor 320 is not greater than the inner diameter of the sinkhole 311 (that is, the radial dimension of the sinkhole 311 corresponds to the model D+1, and the outer diameter dimension of the anchor 320 can be either D+1 or D, which is more applicable).

[0038] The tensioning base 220 and the steel pipe 210 are connected by welding. The tensioning base 220 is a cast iron cylinder, the variable diameter bearing platform 310 is a steel cone, the anchor 320 is a national standard anchor 320, and the sinker 311 is opened according to the national standard size that matches the outer diameter of the anchor 320. The variable diameter bearing platform 310 is backward compatible with the anchor 320, and the anchor 320 can be matched with the anchor cable (steel strand 410). Compared with the existing technical solutions, this solution has low construction difficulty, uses finished parts, can guarantee construction quality, and has a short construction period and low cost.

[0039] In use, the pre-embedded parts are first embedded in the square pile, and then concrete is poured into the square pile. After the square pile has been cured and formed, the end face of the tensioning base 220 is exposed by marking the outside of the square pile (marking the position of the tensioning base 220). Then, the tensioning base 220 and the steel pipe 210 are drilled deeply through drilling equipment, and then the steel strand 410 can be anchored in. After grouting and curing, the reducing bearing platform 310 is installed in the positioning ring 223, and then the anchor 320 is installed. The steel strand 410 in the anchor 320 is tensioned using a jack. After tensioning is completed, the excess steel strand 410 is cut, and the outer wall of the square pile can be restored by pouring.

[0040] The parts of the device not covered herein are the same as or can be implemented using existing technologies.

[0041] Among them, insert and sliding insert are mating bodies with holes, the cross section of the shaft or rod matches the hole, and the shaft or rod can slide relative to the hole. Threaded insert is a hole with threads, the shaft or rod is threaded, and the shaft or rod is connected to the mating body by screwing. Detachable installation can be by bolt thread connection or bolt and nut connection, etc., depending on what can be actually achieved.

[0042] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A prestressed anchor cable tensioning and positioning structure for anchored piles, installed inside a square pile, characterized in that: include The embedded parts include a steel pipe, a tensioning base, and a spiral reinforcing bar that are installed at an angle inside the square pile. The tensioning base is installed above the steel pipe, and the spiral reinforcing bar is sleeved on the outside of the tensioning base. The wing plate of the tensioning base has grouting holes and a positioning structure. The variable diameter bearing platform is connected to the tensioning base through the positioning structure, and an anchor is installed at the end of the variable diameter bearing platform away from the tensioning base.

2. The prestressed cable tensioning and positioning structure of an anchor pile according to claim 1, characterized in that: The variable diameter bearing platform has a truncated cone-shaped variable diameter section, and the axial length of the variable diameter bearing platform is not less than 130mm.

3. The prestressed cable tensioning and positioning structure of an anchor pile according to claim 1, characterized in that: A groove is provided in the middle of the side of the variable diameter bearing platform away from the tensioning base. The anchor is installed in the groove, and the outer diameter of the anchor is not greater than the inner diameter of the groove.

4. The prestressed cable tensioning and positioning structure of an anchor pile according to claim 1, characterized in that: The positioning structure includes a positioning ring, which is fixed to the side of the wing plate near the variable diameter bearing platform. The end of the variable diameter bearing platform is slidably engaged with the positioning ring, and the variable diameter bearing platform abuts against the wing plate.

5. The prestressed anchor cable tensioning and positioning structure for anchored piles as described in claim 1, characterized in that: The square pile includes a pile retaining wall and pile body reinforcement located inside the pile retaining wall, with the wing plate located outside the pile body reinforcement.

6. The prestressed anchor cable tensioning and positioning structure for anchored piles as described in claim 5, characterized in that: The inner walls of the pile retaining wall are respectively provided with retaining wall pits on two opposite sides. The end of the steel pipe is inserted into the retaining wall pit on one side, and the wing plate is installed in the retaining wall pit on the other side.

7. The prestressed anchor cable tensioning and positioning structure for anchored piles as described in claim 1, characterized in that: The tensioning base has reinforcing ribs on its outer side, and the reinforcing ribs are located on the side of the tensioning base away from the grouting hole.

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