Roller compacted concrete dam body drain hole steel pipe hole forming device

Abstract

The utility model relates to the technical field of concrete construction, in particular to a roller compacted concrete dam body drainage hole steel pipe hole forming device which comprises a steel pipe and a supporting frame, the end of the steel pipe is plugged, the pre-buried end of the steel pipe is inserted into a preformed hole in formed concrete, and a pull ring is arranged at the end, away from the pre-buried end, of the steel pipe; the supporting frame is arranged on formed concrete and used for supporting the steel pipe. The drainage holes can be gradually formed by adopting the steel pipes and the supporting frames, and the steel pipes corresponding to the layer are inserted into the formed concrete of the previous layer in a butt joint mode, so that the accuracy of the whole drainage holes is guaranteed, and the problems of deflection and blockage are avoided; and the whole construction process is convenient and simple, and compared with a traditional drain hole forming device, certain labor intensity is reduced, so that the construction efficiency is further improved.

Description

Technical Field

[0001] This application relates to the field of concrete construction technology, and in particular to a device for forming drainage holes in steel pipes of roller-compacted concrete dams. Background Technology

[0002] In the construction of roller-compacted concrete dams, drainage holes in the dam body are a key structure to ensure stable seepage in the dam body, and the quality of their hole formation directly affects the drainage effect and the safety of the dam body.

[0003] Currently, commonly used drainage hole forming techniques mainly include blind pipe method, drilling method, and pull-out method. Among them, the blind pipe method has a significant impact on the mechanical equipment inside the dam, especially for arch dams with narrow dam surfaces, which reduces construction efficiency. Furthermore, compaction cannot be carried out at or around the blind pipe installation site to avoid damaging the overall structure of the blind pipe and affecting the quality of the drainage pipe. The drilling method has high construction costs and a long cycle, and deviations are prone to occur during drilling, making it impossible to precisely control the position of the drainage hole, affecting drainage efficiency. The pull-out method requires the steel pipe to be fixed in the designed position beforehand and pulled out before the concrete initially sets to form the drainage hole. However, the end of the steel pipe lacks effective sealing, allowing concrete to easily enter the pipe and cause blockage; moreover, the steel pipe fixing support is complex and has low installation efficiency.

[0004] Therefore, when constructing drainage holes in roller-compacted concrete dams, it is urgent for construction technicians to solve the problem of what kind of hole-forming device can adapt to the rapid compaction construction rhythm, ensure accurate positioning, and have excellent anti-clogging performance. Utility Model Content

[0005] The purpose of this application is to provide a drilling device for steel pipes used for drainage holes in roller-compacted concrete dams in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, the technical solution of this application is as follows:

[0007] A device for forming drainage holes in a roller-compacted concrete dam using steel pipes includes a steel pipe and a support frame. The end of the steel pipe is sealed, and the pre-embedded end of the steel pipe is inserted into a reserved hole in the pre-formed concrete. A pull ring is provided at the end of the steel pipe away from the pre-embedded end. The support frame is set on the pre-formed concrete to support the steel pipe.

[0008] Preferably, the support frame includes a limiting part and a supporting part, the limiting part being sleeved on the outer peripheral wall of the steel pipe; one end of the supporting part supports the limiting part, and the other end supports the surface layer of the formed concrete.

[0009] Preferably, the limiting part is a hoop, the supporting part is a diagonal brace, the hoop is sleeved on the outer peripheral wall of the steel pipe, one end of the diagonal brace is welded to the hoop, and the other end abuts against the surface of the formed concrete.

[0010] Preferably, the number of the diagonal braces is four, and the four diagonal braces are arranged at circumferential intervals.

[0011] Preferably, the outer peripheral wall of the steel pipe is provided with lubricating oil.

[0012] Preferably, the lubricating oil is salad oil.

[0013] Preferably, a sealing steel plate is provided inside the end of the steel pipe, and the sealing steel plate is welded to the inner wall of the steel pipe.

[0014] Preferably, the pull ring is disposed on the sealing steel plate.

[0015] Preferably, the pull ring is a steel wire rope, which is welded to the sealing steel plate.

[0016] Preferably, the diagonal brace is provided with a reinforcing rod, the reinforcing rod is vertically arranged, and the bottom of the reinforcing rod is connected to the diagonal brace.

[0017] The drainage hole forming device for roller-compacted concrete dams disclosed in this application can gradually form drainage holes by using steel pipes and support frames. Since the corresponding steel pipes of each layer are inserted into the previously formed concrete, the accuracy of the entire drainage hole is ensured, avoiding the problem of skewness and blockage. Moreover, the entire construction process is convenient and simple, reducing the labor intensity compared with traditional drainage hole forming devices, thereby further improving the construction efficiency. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the overall structural construction process of this application;

[0019] Figure 2 This is a longitudinal section diagram of the overall structural construction process of this application;

[0020] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0021] Figure 4 for Figure 2 Sectional view of section AA.

[0022] In the picture:

[0023] 1. Steel pipe; 2. Concrete to be poured on this floor; 3. Diagonal bracing; 4. Hoop; 5. Pre-formed concrete; 6. Reserved hole; 7. Steel wire rope; 8. Sealing steel plate; 9. Drainage gallery. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present application, and therefore only show the components relevant to the present application.

[0025] like Figure 1-4 As shown, a drilling device for drainage holes of a roller-compacted concrete dam includes a steel pipe 1 and a support frame. The end of the steel pipe 1 is sealed, and the pre-embedded end of the steel pipe 1 is inserted into a reserved hole 6 in the pre-formed concrete 5. A pull ring is provided at the end of the steel pipe 1 away from the pre-embedded end. The support frame is set on the pre-formed concrete 5 to support the steel pipe 1.

[0026] In actual use, the steel pipe 1 is first fixed in the reserved hole 6 in the pre-formed concrete 5 by the support frame. Specifically, the lower end of the steel pipe 1, i.e. the pre-embedded end, is inserted, and the other part is located outside the pre-formed concrete 5. The depth of the steel pipe 1 inserted into the previous layer of pre-formed concrete 5 can be 50cm. At the same time, it should be ensured that after the concrete layer is poured, the steel pipe 1 has at least 50cm outside the concrete layer to facilitate the removal of the steel pipe 1 later.

[0027] The support frame is mainly used to support the steel pipe 1 to prevent the steel pipe 1 from tilting.

[0028] In actual implementation, the reserved holes 6 can be set every 3m along the axis of the dam, that is, the steel pipes 1 can be arranged every 3m. The steel pipes 1 can be made of Q235B material. The thickness of each layer of formed concrete can be 3m, and the length of the steel pipe 1 is 4m.

[0029] By using steel pipe 1 and support frame, drainage holes can be gradually formed. Since the steel pipe 1 corresponding to the concrete 2 to be poured in this layer is inserted into the concrete 5 already formed in the previous layer, the accuracy of the entire drainage hole is ensured, and the problem of skew and blockage is avoided. Moreover, the entire construction process is convenient and simple, which reduces the labor intensity compared with traditional drainage hole forming devices, thereby further improving the construction efficiency.

[0030] In some further embodiments, the support frame includes a limiting part and a supporting part, the limiting part being sleeved on the outer peripheral wall of the steel pipe 1; one end of the supporting part supports the limiting part, and the other end supports the surface layer of the formed concrete 5.

[0031] The limiting part is mainly used to limit the steel pipe 1, and the supporting part is used to support the limiting part and simultaneously supports the steel pipe 1.

[0032] In some further embodiments, the limiting part is a hoop 4 and the supporting part is a diagonal brace 3. The hoop 4 is sleeved on the outer peripheral wall of the steel pipe 1, one end of the diagonal brace 3 is welded to the hoop 4, and the other end abuts against the surface of the formed concrete 5.

[0033] The limiting part can be a hoop 4, specifically a round steel hoop 4. The inner diameter of the round steel hoop 4 should be 5 to 10 mm larger than the outer diameter of the steel pipe 1 to avoid friction when the steel pipe 1 is pulled out.

[0034] In some further embodiments, the number of diagonal braces 3 is four, and the four diagonal braces 3 are arranged circumferentially at intervals.

[0035] There can be four diagonal braces, located in the front, back, left, and right directions respectively.

[0036] The diagonal brace 3 can be made of threaded steel bars.

[0037] In some further embodiments, the outer peripheral wall of the steel pipe 1 is provided with lubricating oil.

[0038] The lubricating oil makes it easier to pull the steel pipe 1 outwards, as it effectively reduces friction between the outer wall of the steel pipe 1 and the wall of the formed drainage hole.

[0039] In some further embodiments, the lubricant is salad oil.

[0040] In some further embodiments, a sealing steel plate 8 is provided inside the end of the steel pipe 1, and the sealing steel plate 8 is welded to the inner wall of the steel pipe 1.

[0041] A sealing steel plate 8 is welded to the inner wall of the end of the steel pipe 1. The thickness of the sealing steel plate 8 can be 3mm, and the material can be Q235B.

[0042] The sealing steel plate 8 is used to seal both ends of the steel pipe 1 to prevent debris from entering the drain hole through the steel pipe 1 and causing blockage.

[0043] In some further embodiments, a pull ring is disposed on the sealing steel plate 8.

[0044] The pull ring can be directly installed on the sealing steel plate 8.

[0045] In other embodiments, the pull ring can also be directly disposed on the outer peripheral wall of the steel pipe 1.

[0046] In some further embodiments, the pull ring is a steel wire rope 7, which is welded onto the sealing steel plate 8.

[0047] Specifically, the pull ring can be a steel wire rope 7, which can be directly welded to the sealing steel plate 8.

[0048] The wire rope 7 has a certain degree of flexibility, making it easy to connect with lifting equipment when being pulled.

[0049] In some further embodiments, the diagonal brace 3 is provided with a reinforcing rod, which is vertically arranged and the bottom of the reinforcing rod is connected to the diagonal brace 3.

[0050] In other embodiments, in order to increase the stability of the diagonal brace 3, a reinforcing rod can be set on each diagonal brace 3, so that the connection between the entire support frame and the molded concrete is more solid, and the internal support of the molded concrete can be increased to a certain extent to ensure its strength.

[0051] The bottom of the entire drainage hole is connected to the drainage corridor 9.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A roller compacted concrete dam body drainage hole steel pipe hole forming device, characterized in that, The utility model provides a steel pipe (1) and support frame, the end of steel pipe (1) is closed and set, the embedded end of steel pipe (1) is inserted in the reserved hole (6) in the concrete (5) that has been shaped, and the end of steel pipe (1) away from embedded end is equipped with a pull ring, and the support frame is set on concrete (5) for supporting steel pipe (1).

2. The roller compacted concrete dam body drainage hole steel pipe forming device according to claim 1, characterized in that, The support frame includes a limiting portion and a supporting portion, the limiting portion is sleeved on the outer peripheral wall of the steel pipe (1), one end of the supporting portion supports the limiting portion, and the other end supports the surface layer of the concrete (5) that has been shaped.

3. The device according to claim 2, characterized in that, The limiting portion is a hoop (4), the supporting portion is a diagonal brace (3), the hoop (4) is sleeved on the outer peripheral wall of the steel pipe (1), one end of the diagonal brace (3) is welded with the hoop (4), and the other end abuts against the surface layer of the concrete (5) that has been shaped.

4. The roller compacted concrete dam body drainage hole steel pipe forming device according to claim 3, characterized in that, The number of the diagonal brace (3) is four, and the four diagonal braces (3) are arranged in a circumferential direction.

5. The device according to any one of claims 1 to 4, characterized in that, The outer peripheral wall of the steel pipe (1) is provided with lubricating oil.

6. The roller compacted concrete dam body drainage hole steel pipe forming device according to claim 5, characterized in that, The lubricating oil is salad oil.

7. The roller compacted concrete dam body drain hole steel pipe forming device according to claim 1, characterized in that, The end of the steel pipe (1) is internally provided with a sealing steel plate (8), and the sealing steel plate (8) and the inner wall of the steel pipe (1) are mutually welded.

8. The roller compacted concrete dam body drainage hole steel pipe forming device according to claim 7, characterized in that, The pull ring is arranged on the sealing steel plate (8).

9. The roller compacted concrete dam body drainage hole steel pipe hole-forming device according to claim 8, characterized in that, The pull ring is a steel wire rope (7), and the steel wire rope (7) is welded on the sealing steel plate (8).

10. The roller compacted concrete dam body drainage hole steel pipe forming device according to claim 3 or 4, characterized in that, The diagonal brace (3) is provided with a reinforcing rod, the reinforcing rod is vertically arranged, and the bottom of the reinforcing rod is connected with the diagonal brace (3).

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