Rock-fill dam panel horizontal construction joint

Abstract

The utility model discloses a rockfill dam panel horizontal construction joint which comprises a pre-pouring block, a post-pouring block is arranged on the pre-pouring block, a horizontal joint is formed between the pre-pouring block and the post-pouring block, and a steel bar assembly is arranged between the pre-pouring block and the post-pouring block and used for improving the shear capacity. Longitudinal steel bars, stirrups and reinforcing ribs are arranged in the steel bar assembly, and the connection strength is enhanced through cooperation. A supporting seat and an inclined plate are arranged in the steel bar assembly, the concrete connection strength is enhanced by adding a discontinuous surface, and the shear capacity is improved by matching with the steel bar assembly; the reinforcing steel bar assembly comprises a supporting seat, a first pouring block and a second pouring block, the supporting seat is fixedly arranged on the first pouring block, and an empty groove is formed in the supporting seat; the two inclined plates are oppositely and fixedly connected into the empty groove; and the longitudinal reinforcing steel bars are fixedly connected into the supporting seats. According to the utility model, the connection strength between the concrete of the pre-cast block and the concrete of the post-cast block can be enhanced, and meanwhile, the shear capacity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rockfill dams, in particular to a horizontal construction joint of a rockfill dam panel. Background Technique

[0002] The rockfill dam panel is the main anti-seepage structure of the concrete face rockfill dam. It is made of concrete materials and is located on the upstream surface of the rockfill body. It plays a role in isolating the contact between water bodies and the rockfill body and preventing water seepage, and is a key part to ensure the safe and stable operation of the rockfill dam.

[0003] In the current construction technology of rockfill dam panels, a significant technical challenge lies in the treatment of horizontal construction joints. Specifically, the connection force between the post-cast block and the newly cast block is often relatively weak, mainly due to improper treatment of the construction joint and the interface between new and old concrete. This problem of insufficient connection force directly leads to a weakening of the shear resistance of the construction joint area, and may further affect the stability and durability of the entire panel structure. Therefore, strengthening the treatment technology of construction joints and improving the connection strength between the post-cast block and the newly cast block are the key links to improve the overall performance of the rockfill dam panel. For this reason, we propose a horizontal construction joint of a rockfill dam panel. Content of the Utility Model

[0004] The purpose of the utility model is to provide a horizontal construction joint of a rockfill dam panel to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A horizontal construction joint of a rockfill dam panel, comprising:

[0007] A pre-cast block, on which a post-cast block is arranged. A horizontal joint is formed between the pre-cast block and the post-cast block, and a steel bar assembly is arranged between the pre-cast block and the post-cast block for enhancing the shear resistance;

[0008] Longitudinal steel bars, stirrups and reinforcing bars are arranged in the steel bar assembly to enhance the connection strength through cooperation;

[0009] A support seat and an inclined plate are arranged in the steel bar assembly. By adding a discontinuous surface, the concrete connection strength is enhanced, and in cooperation with the steel bar assembly, the shear resistance is improved.

[0010] Preferably: The steel bar assembly includes:

[0011] A support seat, which is fixedly arranged on the pre-cast block, and an empty groove is formed in the support seat;

[0012] An inclined plate, and two inclined plates are fixedly connected to each other in the empty groove;

[0013] Longitudinal steel bars, which are fixedly connected inside the support base, and the bottom ends of the longitudinal steel bars are inserted into the pre-cast block. There are multiple longitudinal steel bars.

[0014] Stirrups, which are hoop-connected outside multiple longitudinal steel bars.

[0015] Reinforcing bars, which penetrate through the support base, and the middle section of the reinforcing bars is inserted into the empty groove and is located between two inclined plates.

[0016] Preferably: Two grooves are formed inside the support base.

[0017] Preferably: Multiple support bases are provided, and multiple support bases are fixedly connected through reinforcing bars. The stirrups inside multiple support bases are provided in two groups, and the two groups are respectively hoop-connected at the top and bottom positions of multiple longitudinal steel bars.

[0018] Preferably: Connection blocks are arranged between multiple stirrups and multiple longitudinal steel bars, and multiple stirrups are hoop-connected to multiple longitudinal steel bars through the connection blocks.

[0019] Preferably: The pre-cast block and the post-cast block are combined into a whole through a steel bar assembly.

[0020] Preferably: Multiple steel bar assemblies are connected into multiple groups, and multiple groups are arranged side by side at equal intervals. The bottoms of multiple support bases all extend into the pre-cast block.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] 1. The horizontal construction joint formed by the pre-cast block and the post-cast block is a discontinuous interface, which can increase the concrete connection strength. When the horizontal construction joint is a discontinuous interface, the reason for increasing the concrete connection strength is that this interface form provides more contact points and biting areas. The discontinuous interface means that there are more concave and convex parts between the new and old concretes. After the concrete is poured again and hardened, these parts can form a tighter mechanical connection. This physical interlocking effect enhances the bonding force between the new and old concretes, thereby improving the overall connection strength.

[0023] 2. The reason why the stirrups and longitudinal steel bars improve the shear resistance of the connection between the pre-cast block and the post-cast block is that: the stirrups surround the concrete to form a reticular structure, effectively restraining the concrete and improving the overall shear performance; the longitudinal steel bars penetrate through the connection part, enhancing the connection strength and sharing the shear force. The two work together to enable the connection part to withstand greater shear force and improve the stability and safety of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0025] Figure 2 It is a schematic structural diagram of the steel bar assembly in the present utility model;

[0026] Figure 3 in the present utility model Figure 2 bottom view;

[0027] Figure 4 It is a structural diagram after pouring the precast block and the postcast block in the present utility model.

[0028] In the figure: 1, precast block; 2, postcast block; 3, horizontal joint; 4, steel bar assembly; 41, support seat; 411, empty slot; 42, inclined plate; 43, longitudinal steel bar; 44, stirrup; 45, reinforcing rib; 46, groove; 47, connecting block. Specific implementation mode

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] As Figures 1-4 shown, in this embodiment, a horizontal construction joint of a rockfill dam faceplate includes a precast block 1, a postcast block 2 is arranged on the precast block 1, a horizontal joint 3 is formed between the precast block 1 and the postcast block 2, the horizontal joint 3 is a discontinuous interface, and a steel bar assembly 4 is arranged between the precast block 1 and the postcast block 2 for improving the shear resistance;

[0031] The steel bar assembly 4 includes a support seat 41, an inclined plate 42, a longitudinal steel bar 43 and a reinforcing rib 45. The support seat 41 is fixedly arranged on the precast block 1, and an empty slot 411 is opened in the support seat 41; two inclined plates 42 are fixedly connected to each other in the empty slot 411; the reinforcing rib 45 penetrates through the support seat 41, and the middle section of the reinforcing rib 45 is inserted into the empty slot 411 and is located between the two inclined plates 42 for connecting a plurality of support seats 41;

[0032] Specifically, due to the formation of gullies between the multiple groups of support seats 41, the concrete of the post-cast block 2 will be poured into the gullies. At the same time, due to the provision of the grooves 46, the concrete of the post-cast block 2 will be poured into the grooves 46, so that the horizontal construction joint formed by the first cast block 1 and the post-cast block 2 is a discontinuous interface, thereby increasing the concrete connection strength. The reason why the horizontal construction joint can increase the concrete connection strength when it is a discontinuous interface is that this interface morphology provides more contact points and bite areas. The discontinuous interface means that there are more concave and convex parts between the new and old concretes. These parts can form a tighter mechanical connection after the concrete is poured again and hardened. This physical mutual interlocking effect strengthens the bonding force between the new and old concretes, thereby improving the overall connection strength.

[0033] The longitudinal steel bars 43 are fixedly connected to the support base 41, and the bottom ends thereof are inserted into the precast block 1. There are multiple stirrups 44, which are connected to the outside of the multiple longitudinal steel bars 43. A connecting block 47 is provided between the multiple stirrups 44 and the multiple longitudinal steel bars 43, which are connected to the multiple longitudinal steel bars 43 through the connecting block 47. Multiple groups of longitudinal steel bars 43 and stirrups 44 are cast into the precast block 1 and the postcast block 2 to improve the shear resistance.

[0034] Specifically, the reason why the stirrups 44 and the longitudinal steel bars 43 improve the shear resistance of the connection between the first cast block 1 and the later cast block 2 is that the stirrups 44 surround the concrete to form a mesh structure, effectively constrain the concrete, and improve the overall shear resistance; the longitudinal steel bars 43 pass through the connection, enhance the connection strength, and share the shear force. The two work together to enable the connection to withstand greater shear force, thereby improving the stability and safety of the overall structure.

[0035] like Figure 2 As shown, in this embodiment, two grooves 46 are opened in the support seat 41. Due to the provision of the grooves 46, the concrete of the later cast block 2 will be poured into the grooves 46, so that the first cast block 1 and the later cast block 2 form mutually interlocking concave and convex parts, while interrupting the connection interface.

[0036] like Figure 1 As shown, further, multiple steel bar assemblies 4 are connected into multiple groups, and the multiple groups are arranged in parallel and equidistantly. The bottoms of the multiple groups of support seats 41 all extend into the pre-cast block 1, and a section of the bottom of the support seat 41 extends into the pre-cast block 1, and will not be completely cast into the pre-cast block 1, which can further strengthen the connection strength between the support seat 41 and the concrete.

[0037] Working principle: A plurality of stirrups 44 are hoop-connected to a plurality of longitudinal rebars 43 through connecting blocks 47. Then, the bottom of the rebar assembly 4 is poured into the pre-cast block 1, so that the bottom sections of a plurality of support seats 41 extend into the pre-cast block 1, and the positions of the grooves 46 in the support seats 41 are located at the top surface of the post-cast block 2. Then, a plurality of support seats 41 together with a plurality of longitudinal rebars 43 and stirrups 44 are divided into multiple groups and poured into the pre-cast block 1 at equal intervals. The multiple groups of support seats 41 are connected and strengthened by reinforcing ribs 45. The concrete of the pre-cast block 1 will enter the empty slots 411, and the two inclined plates 42 will limit the reinforcing ribs 45 downward. By cooperating with the concrete, the reinforcing ribs 45 are strengthened and fixed, so that the connection strength between a single row of multiple support seats 41 can be improved. Then, the post-cast block 2 is poured onto the pre-cast block 1. Since grooves are formed between the multiple groups of support seats 41, the concrete of the post-cast block 2 will be poured into the grooves. At the same time, due to the provision of the grooves 46, the concrete of the post-cast block 2 will be poured into the grooves 46, so that the horizontal construction joint formed by the pre-cast block 1 and the post-cast block 2 is a discontinuous interface, increasing the concrete connection strength. The multiple groups of longitudinal rebars 43 and stirrups 44 are poured into the pre-cast block 1 and the post-cast block 2 to improve the shear resistance.

[0038] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0039] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A horizontal construction joint of a concrete face rockfill dam, characterized in that Including: The pre-cast block (1), on which a post-cast block (2) is arranged. A horizontal joint (3) is formed between the pre-cast block (1) and the post-cast block (2). A steel bar assembly (4) is arranged between the pre-cast block (1) and the post-cast block (2) to enhance the shear resistance capacity. Longitudinal steel bars (43), stirrups (44) and stiffening ribs (45) are arranged in the steel bar assembly (4) to enhance the connection strength through cooperation. A support seat (41) and an inclined plate (42) are arranged in the steel bar assembly (4). By adding a discontinuous surface, the concrete connection strength is enhanced, and it cooperates with the steel bar assembly (4) to improve the shear resistance capacity.

2. The horizontal construction joint of the concrete face slab of the rockfill dam according to claim 1, wherein, The steel bar assembly (4) includes: The support seat (41), which is fixedly arranged on the pre-cast block (1). An empty groove (411) is formed in the support seat (41). The inclined plate (42), and two of the inclined plates (42) are fixedly connected to each other in the empty groove (411). The longitudinal steel bar (43), which is fixedly connected in the support seat (41). The bottom end of the longitudinal steel bar (43) penetrates into the pre-cast block (1), and multiple longitudinal steel bars (43) are provided. The stirrup (44), which is hoop-connected outside the multiple longitudinal steel bars (43). The stiffening rib (45), which penetrates through the support seat (41). The middle section of the stiffening rib (45) penetrates into the empty groove (411) and is located between the two inclined plates (42).

3. The horizontal construction joint of the concrete face slab of the rockfill dam according to claim 1, wherein Two grooves (46) are formed in the support seat (41).

4. The horizontal construction joint of the concrete face slab of the rockfill dam according to claim 1, wherein Multiple support seats (41) are provided. The multiple support seats (41) are fixedly connected to each other through the stiffening ribs (45). The stirrups (44) in the multiple support seats (41) are arranged in two groups, and the two groups are respectively hoop-connected to the top and bottom positions of the multiple longitudinal steel bars (43).

5. The horizontal construction joint of the concrete face slab of the rockfill dam according to claim 1, characterized in that, Connection blocks (47) are arranged between the multiple stirrups (44) and the multiple longitudinal steel bars (43). The multiple stirrups (44) are hoop-connected to the multiple longitudinal steel bars (43) through the connection blocks (47).

6. The horizontal construction joint of the rockfill dam faceplate according to claim 1 is characterized in that, The pre-cast block (1) and the post-cast block (2) are combined into a whole through the steel bar assembly (4).

7. The horizontal construction joint of the concrete face slab of the rock-fill dam according to claim 1, wherein Multiple steel bar assemblies (4) are connected into multiple groups, and the multiple groups are arranged side by side at equal intervals. The bottoms of the multiple support seats (41) of the multiple groups all extend into the pre-cast block (1).

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