Earth-rock overflow cofferdam overflow panel anchoring device

Abstract

The utility model provides an earth-rock overflow cofferdam overflow panel anchoring device which is characterized in that a concrete anchor head is arranged in a cofferdam, an anchoring interval is arranged between the concrete anchor head and a concrete panel of a cofferdam overflow face, and horizontal steel bars are arranged in the anchoring interval. The horizontal reinforcing steel bars comprise connecting reinforcing steel bars fixedly connected with the concrete anchor heads and anchoring reinforcing steel bars connected with the concrete panel, and the connecting reinforcing steel bars are connected with the end parts of the adjacent sides of the anchoring reinforcing steel bars in an assembled manner; and a first bending part is arranged on the connecting section, extending into the concrete panel, of the anchoring steel bar. The overflow face plate on the downstream side slope of the cofferdam can be anchored through the anchoring device, the face plate is prevented from being dragged by water flow to slide and be deformed and damaged, and therefore stability and safety of the overflow face plate of the cofferdam during overflowing are guaranteed. In addition, the connecting steel bars and the anchoring steel bars form an assembly type structure, and the problem that the anchoring device is too long and is not beneficial to hoisting and transportation can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to an anchoring device for an overflow panel of an earth-rock water-passing cofferdam. Background Art

[0002] Water cofferdams in water conservancy and hydropower projects generally have earth-rock structures, concrete structures or cemented gravel structures. Earth-rock cofferdams have poor anti-scouring capabilities. When earth-rock cofferdam structures are used, anti-scouring measures need to be taken on the cofferdam surface. For cofferdams with small flow rates and low flow rates, reinforced gabions or large stones can be used for protection of the cofferdam surface. For large-scale water conservancy and hydropower projects, the flow rate during the flood season is large. When the flow rate reaches more than 10m / s, it is generally necessary to use concrete panels for protection and take certain energy dissipation measures at the same time.

[0003] The soil and rock structure under the concrete panel may produce uneven settlement. When flow flows over the surface of the cofferdam, the overflow panel will be affected by buoyancy, water drag and sliding force. The overflow panel of the cofferdam may be deformed, unstable and damaged after being eroded by high-velocity water. Utility Model Content

[0004] The utility model aims to provide a segmented assembled anchoring device which can anchor the overflow panel of a water-passing cofferdam in a compacted earth-rock cofferdam.

[0005] To this end, the utility model adopts the following technical solutions:

[0006] A device for anchoring an overflow panel of an earth-rock water-passing cofferdam comprises a concrete anchor head arranged inside the cofferdam, an anchoring interval being provided between the concrete anchor head and the concrete panel of the overflow surface of the cofferdam, horizontal steel bars being arranged in the anchoring interval, the horizontal steel bars comprising connecting steel bars fixedly connected to the concrete anchor head and anchoring steel bars connected to the concrete panel, the connecting steel bars and adjacent side ends of the anchoring steel bars being assembledly connected; the anchoring steel bars are provided with a first bending portion on the connecting section thereof extending into the concrete panel.

[0007] Furthermore: the connecting steel bar is provided with a second bending portion in the concrete anchor head.

[0008] Furthermore: the end of the second bent portion is bent downward toward the cofferdam foundation direction.

[0009] Furthermore: the end of the first bending portion is bent upward in a direction away from the cofferdam foundation.

[0010] Furthermore: the length of the connecting steel bar is shorter than the length of the anchoring steel bar.

[0011] Furthermore: a connecting sleeve is arranged in the horizontal steel bar, and the connecting sleeve connects the connecting steel bar and the adjacent side ends of the anchoring steel bar.

[0012] Furthermore: the ends of the connecting steel bar and the anchoring steel bar are connected with terminal threads, and the interior of the connecting sleeve is provided with internal threads connected with the terminal threads.

[0013] Furthermore: a gravel cushion layer is laid between the downstream slope of the cofferdam and the concrete face plate.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model can anchor the overflow panel on the downstream slope of the cofferdam through the anchoring device, preventing the panel from being dragged and slipped by the water flow and deformed and damaged, thereby ensuring the stability and safety of the cofferdam overflow panel during flow. In addition, the utility model forms an assembled structure by connecting the steel bars and the anchoring steel bars, which can effectively solve the problem that the anchoring device is too long and is not conducive to hoisting and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the concrete anchor head, connecting steel bars and connecting sleeve of the utility model;

[0018] Figure 3 It is a schematic diagram of the spatial arrangement of the anchoring device of the utility model.

[0019] The markings in the attached drawings are: 1-concrete anchor head; 2-connecting steel bar; 21-second bending portion; 3-connecting sleeve; 4-anchoring steel bar; 41-first bending portion; 5-concrete panel; 6-sand and gravel cushion layer; 7-earth and stone; 8-earth and stone rolling stratification line; 9-end thread. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0021] like Figure 1-3As shown, an anchoring device for the overflow panel of a soil-rock water-passing cofferdam is provided. A concrete anchor head 1 is provided inside the cofferdam. An anchoring interval is provided between the concrete anchor head 1 and the concrete panel 5 of the overflow surface of the cofferdam. Horizontal steel bars are provided in the anchoring interval. The horizontal steel bars include a connecting steel bar 2 fixedly connected to the concrete anchor head 1 and an anchoring steel bar 4 connected to the concrete panel 5. The connecting steel bar 2 and the anchoring steel bar 4 are assembled and connected to the adjacent side ends. The anchoring steel bar 4 is provided with a first bending portion 41 on the connecting section extending into the concrete panel 5. The first bending portion 41 extends into the concrete panel 5 to further strengthen the connection effect of the concrete panel 5, and can effectively prevent the concrete panel 5 from being dragged and slid by the water flow and deformed and damaged. Under the connection action of the anchoring device, the concrete panel 1 has a good anchoring effect, which can meet the safety and stability requirements of the water-passing cofferdam when a large flow rate and a high flow rate flow through.

[0022] like Figure 1-2 As shown, the connecting steel bar 2 is provided with a second bending portion 21 in the concrete anchor head 1 , which can enhance the connection strength between the concrete anchor head 1 and the connecting steel bar 2 .

[0023] In this embodiment, the second bending portion 21 of the connecting steel bar 2 and the first bending portion 41 of the anchoring steel bar 4 are bent in opposite directions. Figure 1 As shown in , the end of the second bent portion 21 is bent downward toward the direction of the cofferdam foundation, and the end of the first bent portion 41 is bent upward away from the cofferdam foundation.

[0024] Among them, the length of the connecting steel bar 2 is smaller than the length of the anchoring steel bar 4.

[0025] like Figure 1-2 As shown, a connecting sleeve 3 is provided inside the horizontal steel bar, and the connecting sleeve 3 connects the adjacent side ends of the connecting steel bar 2 and the anchoring steel bar 4, which can effectively avoid the problem that the horizontal steel bar is too long and is not conducive to hoisting and transportation as a whole. The ends of the connecting steel bar 2 and the anchoring steel bar 4 are connected with a terminal thread 9, and the connecting sleeve 3 is provided with an internal thread connected to the terminal thread 9.

[0026] In this embodiment, a gravel cushion layer 6 is laid between the downstream slope of the cofferdam and the concrete panel 5. The first bent portion 41 of the anchor steel bar 4 leaks out of the surface of the gravel cushion layer 6 before the concrete panel 5 is poured.

[0027] In this embodiment, the concrete anchor head 1 adopts a concrete cube prefabricated structure, and the structural size can be 0.5m×0.5m×0.5m, which can be processed in advance in a prefabricated parts factory. The connecting anchor bar 2 and the anchoring steel bar 4 can use threaded steel with a diameter of about 25mm to increase the anchoring force. One end of the connecting anchor bar 2 is bent by 20cm and then embedded in the concrete anchor head 1, and one end of the anchoring steel bar 4 is bent by 50cm and then embedded in the concrete panel 5.

[0028] In this embodiment, a number of anchoring devices are spatially arranged in a rectangular shape, which meets the requirements of slope rolling construction after the devices are buried.

[0029] See also Figure 1-3 When the cofferdam is constructed by the anchoring device, the specific steps are as follows:

[0030] S1: The concrete anchor head 1 and the connecting steel bar 2 are prefabricated in advance in the prefabrication plant and transported to the cofferdam site after the cofferdam is successfully cut off;

[0031] S2: Connect the anchoring steel bar 4 to the connecting steel bar 2 through the connecting sleeve 3 at the construction site to assemble and splice the anchoring device on site;

[0032] S3: Anchor devices are arranged at regular intervals in the horizontal and vertical directions of the cofferdam, and are laid and rolled layer by layer as the earth and stone materials 7 of the cofferdam are filled. The earth and stone material rolling layer line 8 should be more than 15cm away from the concrete anchor head 1. The row spacing between adjacent concrete anchor heads 1 can be controlled at 3m-5m, and they are retreated layer by layer to form a rectangular arrangement in space, such as Figure 3 As shown, a rolling space is formed between every two rows of connecting steel bars 2 to meet the later inclined rolling work of the cofferdam gravel cushion layer 6;

[0033] S4: The anchoring device and the earth and stone material 7 are rolled together to form a dense and solid structure. After the earth and stone material 7 of the cofferdam is filled and rolled, a gravel cushion layer 6 is filled on the slope surface and rolled to a certain compaction degree as required;

[0034] S5: Finally, a concrete formwork is erected according to the requirements of the size of the joints and blocks, a concrete panel 5 is cast on site, and the first bent section of the anchoring steel bar 4 is buried therein to form a complete anchoring device.

[0035] The above embodiment is only a preferred technical solution of the present invention. Those skilled in the art should understand that the technical solutions or parameters in the embodiments can be modified or replaced without departing from the principle and essence of the present invention, and all should be included in the protection scope of the present invention.

Claims

1. An anchoring device for overflow panel of earth-rock water-passing cofferdam, characterized in that: A concrete anchor head (1) is arranged inside the cofferdam, and an anchoring interval is provided between the concrete anchor head (1) and the concrete panel (5) of the overflow surface of the cofferdam. Horizontal steel bars are arranged in the anchoring interval, and the horizontal steel bars include connecting steel bars (2) fixedly connected to the concrete anchor head (1) and anchoring steel bars (4) connected to the concrete panel (5). The connecting steel bars (2) and the anchoring steel bars (4) are assembled between adjacent side ends; the anchoring steel bars (4) are provided with a first bent portion (41) on the connecting section thereof extending into the concrete panel (5).

2. The earth-rock cofferdam overflow panel anchoring device according to claim 1, characterized in that: The connecting steel bar (2) is provided with a second bent portion (21) inside the concrete anchor head (1).

3. The earth-rock cofferdam overflow panel anchoring device according to claim 2 is characterized in that: The end of the second bent portion (21) is bent downward toward the cofferdam foundation.

4. The earth-rock water-passing cofferdam overflow panel anchoring device according to claim 1 or 3, characterized in that: The end of the first bent portion (41) is bent upward in a direction away from the cofferdam foundation.

5. The earth-rock water-passing cofferdam overflow panel anchoring device according to claim 1 is characterized by: The length of the connecting steel bar (2) is shorter than the length of the anchoring steel bar (4).

6. The earth-rock cofferdam overflow panel anchoring device according to claim 1, characterized in that: A connecting sleeve (3) is provided in the horizontal steel bar, and the connecting sleeve (3) connects the adjacent side ends of the connecting steel bar (2) and the anchoring steel bar (4).

7. The earth-rock cofferdam overflow panel anchoring device according to claim 6, characterized in that: The ends of the connecting steel bar (2) and the anchoring steel bar (4) are connected with terminal threads (9), and the interior of the connecting sleeve (3) is provided with internal threads connected with the terminal threads (9).

8. The earth-rock water-passing cofferdam overflow panel anchoring device according to claim 1 is characterized by: A gravel cushion layer (6) is laid between the downstream slope of the cofferdam and the concrete panel (5).

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