Wind power mixed tower prefabricated segment vertical joint grouting auxiliary device

Abstract

The utility model relates to the technical field of mixed tower pipe piece construction, especially to a wind power mixed tower prefabricated pipe piece vertical seam grouting auxiliary device, it includes detachable installation in two pipe piece top's mounting bracket, and the mounting bracket includes the top plate and the side plate fixed perpendicularly in the both sides of top plate, and the top plate is opened and has the hole one, and the mounting bracket is provided with the positioning mechanism for fixed mounting bracket between the pipe piece, and the top plate is installed with the flexible sealing plate between pipe piece top surface, and the flexible sealing plate is opened and has the hole two, and the hole one, the hole two and grouting vertical seam are penetrated up and down. Through setting the hole one and the hole two, it is convenient for slurry exhaust and overflow when bottom grouting, forms the pressure through grouting liquid height difference, guarantees top grouting liquid filling compactness, owing to designing the overfilling part, effectively prevents top grouting liquid and air contact, and the moisture dispersion is too fast and produces the crack, thereby guaranteed construction quality.

Description

Technical Field

[0001] This utility model relates to the technical field of precast tunnel segment construction in wind power mixed towers, and in particular to an auxiliary device for grouting vertical joints of precast tunnel segments in wind power mixed towers. Background Technology

[0002] The market share of hybrid steel towers, which combine concrete and steel sections, in the ultra-high-rise wind power market is gradually increasing, and their advantages are becoming more and more obvious. Each section of the hybrid tower is approximately 4 meters high with a wall thickness of 300 mm. The lower tower section has a larger outer diameter and is composed of two or more C-shaped sections. The vertical joints are connected by reinforcing bars and grouted to form a unified O-shaped pipe section.

[0003] Vertical joints typically have a 20mm wide gap. Sealing strips are applied to both sides of the segment's cross-section. Pressure grouting is performed from the bottom, and grouting ends when it overflows from the top. The bottom of the segment is relatively dense due to the gravity of the grout above; however, the top layer lacks the pressure of its own weight and is exposed to air, making it prone to rapid drying and cracking. Therefore, improving the density of the grout at the top of the vertical joint to ensure construction quality is a key research area in this field. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the present invention provides an auxiliary device for grouting vertical joints of precast segments in wind power hybrid towers.

[0005] The auxiliary device for vertical joint grouting of precast tunnel segments in wind power hybrid towers provided by this utility model adopts the following technical solution:

[0006] A grouting auxiliary device for vertical joints of precast tunnel segments in a wind turbine hybrid tower includes a mounting frame that can be detachably installed on the top of two tunnel segments. The mounting frame includes a top plate and side plates that are vertically fixed to both sides of the top plate. A clearance hole 1 is provided on the top plate. A positioning mechanism for fixing the mounting frame is provided between the mounting frame and the tunnel segment. A flexible sealing plate is installed between the top plate and the top surface of the tunnel segment. A clearance hole 2 is provided on the flexible sealing plate. The clearance hole 1 and the clearance hole 2 are vertically connected to the grouting vertical joint.

[0007] By adopting the above technical solution, the grout is vented and overflowed during bottom grouting by setting relief holes one and two. Pressure is formed by the height difference of the grout to ensure that the top grout is filled densely. The design of the over-grouting section effectively prevents the top grout from contacting air and from losing moisture too quickly and causing cracks, thereby ensuring the construction quality.

[0008] Optionally, the positioning mechanism includes a locking nut fixed to the side plate, with a locking screw threaded onto the internal thread of the locking nut, the locking screw passing through the side plate and abutting against the side wall of the tube segment.

[0009] By adopting the above technical solution, construction workers can rotate the locking screw to press it against the side wall of the tube segment, thereby fixing the installation frame. This positioning mechanism is easy to operate and has a good fixing effect.

[0010] Optionally, the flexible sealing plate can be a rubber gasket.

[0011] By adopting the above technical solution, the rubber pad has good elastic deformation performance and good sealing performance, and is easy to source, manufacture and use.

[0012] Optionally, two positioning mechanisms are provided on each side plate.

[0013] By adopting the above technical solution, the positioning mechanisms are set in pairs, which makes it easier to distribute the force evenly on the mounting frame and improves stability.

[0014] Optionally, the size of the second relief hole shall not be smaller than the size of the first relief hole.

[0015] Optionally, both the second relief hole and the first relief hole can be rectangular holes.

[0016] Optionally, at least one flexible sealing plate may be provided.

[0017] Optionally, the mounting bracket is welded from steel plates. Attached Figure Description

[0018] Figure 1 This is a top view of the grouting auxiliary device and the segment assembly according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Sectional view along the AA direction.

[0020] Figure 3 This is a schematic diagram of the structure of the flexible sealing plate according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Segment; 2. Grouting vertical joint; 3. Mounting bracket; 30. Top plate; 300. Clearance hole one; 31. Side plate; 4. Positioning mechanism; 40. Locking nut; 41. Locking screw; 5. Flexible sealing plate; 50. Clearance hole two. Detailed Implementation

[0022] The following combination Figures 1-3 The present invention will be described in further detail below.

[0023] This utility model discloses an auxiliary device for grouting vertical joints of precast segments in wind power hybrid towers.

[0024] Reference Figure 1 and Figure 2A 20mm wide vertical grouting joint 2 is reserved between the two segments 1. The grouting auxiliary device for the vertical joint of the precast segments of the wind power hybrid tower is installed between the tops of the two segments 1. It includes a mounting frame 3, which is made of steel plate. The mounting frame 3 includes a top plate 30 located above the vertical grouting joint 2. The thickness of the top plate 30 is not less than 10mm. The length of the top plate 30 extending beyond the edge of the segment 1 is 30-50mm. The length of the top plate 30 extending beyond the edge of the vertical grouting joint 2 is 100mm. A rectangular clearance hole 300 is opened in the middle of the top plate 30. The size of the clearance hole 300 is 250*60mm. A side plate 31 is vertically fixed at both ends of the length direction of the top plate 30. The side plate 31 extends downward and has a length of 300-500mm.

[0025] Reference Figure 1 and Figure 2 The side plate 31 is provided with a positioning mechanism 4 for fixing the mounting bracket 3. There are four positioning mechanisms 4 in total, two of which are provided on each side plate 31. The positioning mechanism 4 includes a locking nut 40 fixed to the outer wall of the side plate 31. The locking nut 40 has a locking screw 41 installed in its internal thread. The locking screw 41 passes through the side plate 31 and abuts against the side wall of the tube segment 1, thereby fixing the mounting bracket 3.

[0026] Reference Figure 2 and Figure 3 A flexible sealing plate 5 is also installed between the top plate 30 and the top surface of the segment 1. The flexible sealing plate 5 can be one or more rubber pads stacked together. The length of the flexible sealing plate 5 is adapted to the distance between the two side plates 31. The top surface of the flexible sealing plate 5 is in sealing contact with the top plate 30, and the bottom surface is in sealing contact with the segment 1. A rectangular clearance hole 2 50 is opened in the middle of the flexible sealing plate 5. The size of the clearance hole 2 50 is greater than or equal to the size of the clearance hole 1 300.

[0027] The implementation principle of the auxiliary device for grouting vertical joints of precast tunnel segments in this embodiment of the utility model is as follows: After the tunnel segment 1 is assembled, the sealing strips between the tunnel segments 1 are bonded, and the fastening band is tightened to meet the grouting conditions, the construction personnel first place the flexible sealing plate 5 between the tops of the two tunnel segments 1, so that the second clearance hole 50 is aligned with the grouting vertical joint 2, and then install the mounting frame 3 on the tunnel segment 1 and the flexible sealing plate 5, so that the first clearance hole 300 is aligned with the grouting vertical joint 2. Before locking the mounting frame 3, the flexible sealing plate 5 can be appropriately compacted by gravity to improve the anti-grout leakage performance. Then, the locking screw 41 is rotated to make the locking screw 41 abut against the side wall of the tunnel segment 1, thereby fixing the mounting frame 3.

[0028] Subsequently, the bottom grouting method is adopted. During the grouting process, when it is found that the top grout overflows from above the top plate 30 without any air bubbles being released, it indicates that the grouting is complete, and the bottom grouting valve is closed at this time. Before grouting, the vertical grouting joint 2 should be fully moistened, and there should be no water accumulation. A water test should be conducted in the vertical grouting joint 2 before grouting to avoid grout leakage during grouting. Cement-based grouting material is used for grouting. Mechanical mixing is recommended, and the mixing time should not be less than 5 minutes to ensure that the grouting material is mixed evenly. The two vertical grouting joints 2 should preferably be grouted simultaneously. Grouting should be carried out slowly, with a flow rate of 5-10 L / min, and should not exceed 10 L / min.

[0029] The filling time for grouting vertical joint 2 is approximately 10-20 minutes, and should be followed according to the instruction manual or manufacturer's guidance. Once the grout has reached initial setting and meets the relevant specifications, loosen the locking screw 41, remove the mounting bracket 3 that is upside down on the segment 1, and remove the flexible sealing plate 5. At this point, a grout sheet wall is formed above the grouting vertical joint 2 and is wider than the grouting vertical joint 2, forming a convex shape. Finally, the grout sheet wall is cut, repaired, and leveled.

[0030] The vertical joint grouting auxiliary device of this utility model provides venting and overflow of grout during bottom grouting by setting a first 300 and a second 50. The pressure formed by the height difference of the grout ensures that the top grout is filled densely. Due to the design of the over-grouting section, it effectively prevents the top grout from contacting air and causing cracks due to excessive moisture loss, thereby ensuring the construction quality.

[0031] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An auxiliary device for grouting vertical joints of precast tunnel segments in a wind turbine hybrid tower, characterized in that: The system includes a mounting bracket (3) that can be detachably installed on the top of two pipe segments (1). The mounting bracket (3) includes a top plate (30) and side plates (31) that are vertically fixed on both sides of the top plate (30). A clearance hole (300) is provided on the top plate (30). A positioning mechanism (4) for fixing the mounting bracket (3) is provided between the mounting bracket (3) and the pipe segment (1). A flexible sealing plate (5) is installed between the top plate (30) and the top surface of the pipe segment (1). A clearance hole (50) is provided on the flexible sealing plate (5). The clearance hole (300) and the clearance hole (50) are vertically connected to the grouting vertical joint (2).

2. The auxiliary device for vertical joint grouting of precast tunnel segments in wind power hybrid towers according to claim 1, characterized in that: The positioning mechanism (4) includes a locking nut (40) fixed on the side plate (31), and a locking screw (41) is installed on the internal thread of the locking nut (40). The locking screw (41) passes through the side plate (31) and abuts against the side wall of the tube segment (1).

3. The auxiliary device for vertical joint grouting of precast tunnel segments in wind power hybrid towers according to claim 1, characterized in that: The flexible sealing plate (5) is a rubber pad.

4. The auxiliary device for vertical joint grouting of precast tunnel segments in wind power hybrid towers according to claim 2, characterized in that: Two positioning mechanisms (4) are provided on each side plate (31).

5. The auxiliary device for vertical joint grouting of precast tunnel segments in wind power hybrid towers according to claim 1, characterized in that: The size of the second relief hole (50) is not less than the size of the first relief hole (300).

6. The auxiliary device for vertical joint grouting of precast tunnel segments in wind power hybrid towers according to claim 1, characterized in that: Both the second relief hole (50) and the first relief hole (300) are rectangular holes.

7. The auxiliary device for vertical joint grouting of precast tunnel segments in wind power hybrid towers according to claim 1, characterized in that: At least one flexible sealing plate (5) is provided.

8. The auxiliary device for vertical joint grouting of precast tunnel segments in wind power hybrid towers according to claim 1, characterized in that: The mounting bracket (3) is welded from steel plates.

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