Hidden type anchor sealing anti-corrosion device of pile-anchor support

Abstract

The utility model discloses a hidden type anchor sealing anti-corrosion device of a piled-anchor support, and aims to solve the problems that in the existing piled-anchor scheme, when an anchor cable is arranged on a round support pile body of a mechanical hole forming, the positioning difficulty is high, and after a pile is formed, the anchor cable is constructed in a hole forming mode on the pile body, and the safety of a pile structure is influenced. The device comprises a supporting pile and an anchor cable steel strand, a reinforcement cage is arranged in the supporting pile, a steel pipe is arranged on the reinforcement cage, sealing steel plates are fixedly welded to the two ends of the steel pipe, and a center positioning steel bar is fixedly welded to the upper surface of the steel pipe and is higher than the supporting pile. The anchor cable can be arranged on the pile body, so that the stress distribution of the pile anchor structure is effectively improved, the internal force of the support pile is coordinated, the reliability of the permanent slope support pile anchor structure is improved, the quality is controllable, safety and reliability are realized, the full grouting of an orifice can be ensured, and the service life of the pre-stressed anchor cable is effectively prolonged; meanwhile, supporting pile steel bars can be prevented from being damaged when the anchor cables form holes in the piles, and the effect is remarkable.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground engineering, and in particular relates to a concealed anchor sealing and anti-corrosion device for pile anchor support. Background Art

[0002] In high slope support projects, when slope cutting is restricted, vertical support forms such as pile-sheet walls have to be adopted. If the vertical height of the slope exceeds 8m, prestressed anchor cables need to be installed to coordinate the internal force and deformation of the support piles. The prestressed anchor cable consists of three parts: the anchor body, the free section and the external anchor head. The free section and the external anchor head are the parts where the anchor cable provides prestressing and locking. The quality of anti-corrosion and anti-rust construction seriously affects the service life of the anchor cable. In the high slope support structure, how to do a good job in anti-corrosion and anti-rust of the free section and the external anchor head and improve the service life of the anchor cable is an issue that needs to be considered in slope design and construction.

[0003] There are two ways to arrange anchor cables in the existing pile-anchor scheme: between piles and in the pile body. When the anchor cable is arranged between piles, a waist beam needs to be set to coordinate the internal force of the supporting pile. The mechanism of action is complex. In addition, the free section of the anchor cable is all in the soil layer. The incomplete grouting of the hole and the inadequate construction of the anti-corrosion and anti-rust measures at the hole are relatively common construction problems. The construction quality is uncontrollable, which greatly reduces the service life of the anchor cable. When the anchor cable is arranged in the pile body, the anchor cable and the pile work together to bear the soil pressure, which can better coordinate the internal force of the pile body and have a better effect. In addition, the free section of the hole of the anchor cable is set in the pile body, and the quality of the hole grouting and anti-corrosion and anti-rust construction is easier to ensure, which can better extend the service life of the anchor cable. However, the anchor cable arranged in the pile body is mostly used on manually dug piles, while on the circular supporting piles with mechanical holes, the steel cage is easy to rotate during hoisting, which makes it difficult to locate. After the pile is formed, the anchor cable is constructed by drilling holes in the pile body, which can easily damage the steel bars of the supporting pile body and affect the structural safety of the pile. Utility Model Content

[0004] (1) Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a concealed anchor sealing and anti-corrosion device for pile-anchor support, which aims to solve the problem that in the existing pile-anchor scheme, when the anchor cable is arranged in a circular supporting pile body with a mechanical hole, the steel cage is easy to rotate during hoisting, making it difficult to position it. After the pile is formed, the anchor cable is constructed in the hole of the pile body, which can easily damage the steel bars of the supporting pile body and affect the safety of the pile structure.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the utility model provides a concealed anchor sealing and anti-corrosion device for pile-anchor support, which includes a supporting pile and an anchor cable steel strand. A steel cage is arranged inside the supporting pile, and a steel pipe is arranged on the steel cage. Sealing steel plates are welded and fixed at both ends of the steel pipe, and a central positioning steel bar is welded and fixed on the upper surface of the steel pipe and is higher than the supporting pile. One end of the anchor cable steel strand is located inside the soil, and the other end of the anchor cable steel strand passes through the steel pipe and the sealing steel plate and is fixed by a grouting body.

[0008] Preferably, the retaining piles are circular retaining piles or bored piles with mechanical holes, and the pile diameter of the retaining piles is greater than 1.2 meters.

[0009] Furthermore, the steel cage includes a plurality of supporting main bars and reinforcing stirrups wound around the outer surfaces of the supporting main bars.

[0010] Furthermore, the steel pipe and the steel cage are fixedly connected by binding or spot welding.

[0011] Furthermore, the steel pipe is arranged at an angle, and the position of the steel pipe is determined according to the elevation and incident angle of the anchor cable steel strand.

[0012] Furthermore, there are multiple steel pipes, and connecting ribs are fixedly connected between two adjacent steel pipes, and the connecting ribs are in a U-shaped structure as a whole.

[0013] Furthermore, a mounting hole is opened on the sealing steel plate, a PVC pipe is installed at the mounting hole, the anchor cable steel strand is located inside the PVC pipe, and the grouting body overflows from the pipe mouth of the PVC pipe.

[0014] Furthermore, the center positioning steel bar is an overall U-shaped structure, and the center positioning steel bar includes a horizontal section and vertical sections fixedly connected to both ends of the horizontal section, and the horizontal section is welded and fixed to the upper surface of the steel pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model can set the anchor cable on the pile body, effectively improving the force distribution of the pile-anchor structure, coordinating the internal force of the supporting pile, and improving the reliability of the permanent slope supporting pile-anchor structure. The quality is controllable, safe and reliable, and the full grouting of the hole mouth can be ensured, which effectively increases the service life of the prestressed anchor cable. At the same time, it can also avoid damaging the supporting pile steel bars when the anchor cable is drilling a hole on the pile, and the effect is remarkable.

[0017] The utility model can be used for mechanically bored circular supporting piles as well as bored piles, and has a wide range of applications. The anchor cables are arranged on the pile body, and the sealing anchor can adopt anchor piers. The vertical arrangement of the anchor cables can be adjusted as needed, which is economical, environmentally friendly, convenient and flexible, and the process is relatively simple, the construction is convenient, and it is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0019] Figure 2 It is a top view structural schematic diagram of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the steel pipe of the utility model.

[0021] Figure 4 It is a structural schematic diagram of a plurality of steel pipes installed in a reinforcement cage of the utility model.

[0022] The markings in the attached figure are: 1. Support piles; 2. Anchor cable steel strands; 3. Steel cage; 4. Steel pipe; 5. Sealing steel plate; 6. Center positioning steel bar; 7. Grouting body; 8. Connecting bar; 10. Mounting hole; 11. PVC pipe; 301. Support main bar; 302. Reinforcement stirrups; 601. Horizontal section; 602. Vertical section. DETAILED DESCRIPTION

[0023] This specific embodiment is a buried anchor sealing and anti-corrosion device for pile anchor support, and its structural schematic diagram is as follows Figure 1-Figure 4 As shown, the device includes a supporting pile 1 and an anchor cable steel strand 2. A steel cage 3 is arranged inside the supporting pile 1, and a steel pipe 4 is arranged on the steel cage 3. Since the steel pipe 4 is arranged on the steel cage 3 in advance, there is no need to drill holes in the pile body for anchor cable construction after the pile is formed, so that the steel bars of the supporting pile 1 will not be damaged, thereby improving the safety of the pile structure. Sealing steel plates 5 are welded and fixed at both ends of the steel pipe 4, and a center positioning steel bar 6 is welded and fixed on the upper surface of the steel pipe 4 and is higher than the supporting pile 1. In this way, the position of the center positioning steel bar 6 can be observed when the steel cage 3 is hoisted, thereby facilitating the positioning of the steel pipe 4 and facilitating the installation of the anchor cable steel strand 2. One end of the anchor cable steel strand 2 is located inside the soil, and the other end of the anchor cable steel strand 2 passes through the steel pipe 4 and the sealing steel plate 5 and is fixed by a grouting body 7.

[0024] like Figure 1 and Figure 2 As shown: In this embodiment, the support pile 1 is a circular support pile or a bored pile with a mechanical hole, and the pile diameter of the support pile 1 is greater than 1.2 meters. This setting takes into account the need to lower auxiliary equipment such as a guide tube when pouring pile core concrete, and has good adaptability.

[0025] like Figure 1 and Figure 2 As shown: In this embodiment, the steel cage 3 includes a plurality of supporting main bars 301 and reinforcing stirrups 302 wound around the outer surface of the supporting main bars 301.

[0026] In this way, the main supporting reinforcement 301 and the reinforcing stirrups 302 are both arranged inside the supporting pile 1, thereby improving the strength of the supporting pile 1.

[0027] In this embodiment, the steel pipe 4 and the steel cage 3 are fixedly connected by binding or spot welding, which facilitates the fixation between the steel cage 3 and the steel pipe 4, improves the overall connection strength, and better supports the support pile 1.

[0028] like Figure 1 and Figure 4 As shown: In this embodiment, the steel pipe 4 is arranged at an angle, and the position of the steel pipe 4 is determined according to the elevation and incident angle of the anchor cable steel strand 2.

[0029] like Figure 1 and Figure 4 As shown: In this embodiment, there are multiple steel pipes 4, and connecting ribs 8 are fixedly connected between two adjacent steel pipes 4, and the connecting ribs 8 are in a U-shaped structure as a whole.

[0030] Such an arrangement allows a plurality of anchor cable steel strands 2 to be arranged on the support pile 1 , thereby greatly improving the support effect of the support pile 1 .

[0031] like Figure 1 and Figure 3 As shown: In this embodiment, a mounting hole 10 is opened on the sealing steel plate 5, a PVC pipe 11 is installed at the mounting hole 10, the anchor cable steel strand 2 is located inside the PVC pipe 11, and the grouting body 7 overflows from the pipe mouth of the PVC pipe 11. This arrangement can ensure that the hole mouth is full of grouting, effectively improving the service life of the prestressed anchor cable.

[0032] like Figure 1 and Figure 3 As shown: In this embodiment, the center positioning steel bar 6 is an overall U-shaped structure, and the center positioning steel bar 6 includes a horizontal section 601 and a vertical section 602 fixedly connected to both ends of the horizontal section 601. The horizontal section 601 is welded and fixed to the upper surface of the steel pipe 4. This arrangement makes the center positioning steel bar 6 and the steel pipe 4 more firm, which is conducive to positioning.

[0033] Working principle: According to the elevation and incident angle of the anchor cable steel strand 2, a steel pipe 4 is arranged at the corresponding position of the steel cage 3 of the supporting pile 1. The steel pipe 4 and the steel cage 3 are connected by binding or spot welding. The two ends of the steel pipe 4 are sealed with steel plates. The two sides of the steel pipe 4 are welded and fixed to the main reinforcement of the supporting pile 1. The center positioning steel bar 6 is welded on the top of the steel pipe 4 and the two ends are higher than the pile top. It is used for positioning when the steel cage 3 is hoisted. It can not only effectively coordinate the force distribution of the pile anchor structure and improve the reliability of the anchor cable steel strand 2, but also effectively ensure the anti-corrosion and anti-rust of the hole of the free section of the prestressed anchor cable, greatly improving the service life of the anchor cable. At the same time, anchor piers can also be used to replace the waist beam. Compared with the conventional free section anti-corrosion device, this device has a wider range of applications, not only can it save costs, improve environmental protection and energy-saving effects, but also has a simple process, convenient construction, and is easier to promote and use;

[0034] The construction method is: cross-laying on site for positioning the anchor cable steel strand 2 → tying the steel cage 3 of the supporting pile 1, pre-embedding the anchor cable anti-corrosion device at the designed anchor cable elevation → drilling the supporting pile 1 → hanging the steel cage 3, adjusting the angle of the steel cage 3 according to the central positioning steel bar 6 → pouring the pile core concrete → excavating the earth in front of the pile to the designed anchor cable elevation → chiseling off the concrete surface layer outside the pre-embedded steel pipe to expose the sealing steel plate 5 → drilling the anchor cable in the pre-embedded device → lowering the prestressed anchor cable steel strand 2 → applying butter to the anchor cable steel strand 2 at the hole mouth, and setting the PVC pipe 11 at the hole mouth → grouting in the hole until the slurry overflows from the pipe mouth of the PVC pipe 11 → tensioning the anchor cable and sealing the anchor.

[0035] All technical features in this embodiment can be freely combined according to actual needs.

[0036] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A concealed anchor sealing and anti-corrosion device for pile anchor support, the device comprising a support pile (1) and an anchor cable steel strand (2), characterized in that: A steel cage (3) is arranged inside the support pile (1), a steel pipe (4) is arranged on the steel cage (3), sealing steel plates (5) are welded and fixed at both ends of the steel pipe (4), a central positioning steel bar (6) is welded and fixed on the upper surface of the steel pipe (4) and is higher than the support pile (1), one end of the anchor cable steel strand (2) is located inside the soil, and the other end of the anchor cable steel strand (2) passes through the steel pipe (4) and the sealing steel plate (5) and is fixed by a grouting body (7).

2. The buried anchor sealing and anti-corrosion device for pile anchor support according to claim 1 is characterized in that: The support pile (1) is a circular support pile or a bored pile with a mechanical hole, and the pile diameter of the support pile (1) is greater than 1.2 meters.

3. The buried anchor sealing and anti-corrosion device for pile anchor support according to claim 2 is characterized in that: The steel cage (3) comprises a plurality of supporting main bars (301) and reinforcing stirrups (302) wound around the outer surfaces of the supporting main bars (301).

4. The buried anchor sealing and anti-corrosion device for pile anchor support according to claim 3 is characterized in that: The steel pipe (4) and the steel cage (3) are fixedly connected by binding or spot welding.

5. The buried anchor sealing and anti-corrosion device for pile anchor support according to claim 1 is characterized in that: The steel pipe (4) is arranged at an angle, and the position of the steel pipe (4) is determined according to the elevation and incident angle of the anchor cable steel strand (2).

6. The buried anchor sealing and anti-corrosion device for pile anchor support according to claim 4 is characterized in that: There are a plurality of steel pipes (4), and connecting ribs (8) are fixedly connected between two adjacent steel pipes (4), wherein the connecting ribs (8) are in a square-shaped structure as a whole.

7. The buried anchor sealing and anti-corrosion device for pile anchor support according to claim 1 is characterized in that: The sealing steel plate (5) is provided with a mounting hole (10), a PVC pipe (11) is installed at the mounting hole (10), the anchor cable steel strand (2) is located inside the PVC pipe (11), and the grouting body (7) overflows from the pipe opening of the PVC pipe (11).

8. The buried anchor sealing and anti-corrosion device for pile anchor support according to claim 1 is characterized in that: The central positioning steel bar (6) is of a U-shaped structure as a whole, and comprises a horizontal section (601) and vertical sections (602) fixedly connected to both ends of the horizontal section (601), and the horizontal section (601) is welded and fixed to the upper surface of the steel pipe (4).

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