Movable joint connection structure for panel dam

Abstract

The present disclosure relates to a movable joint connection structure for a panel dam, the movable joint connection structure comprising a concrete panel and a movable part, the concrete panel is used to be arranged on the panel dam and comprises an upper concrete panel and a lower concrete panel arranged at intervals, so as to form a connection seam between the upper concrete panel and the lower concrete panel; the movable part is arranged in the connection seam and connected between the upper concrete panel and the lower concrete panel, so that the upper concrete panel is rotatably connected to the lower concrete panel through the movable part, so as to solve the problem in the related art that the bottom of the concrete panel on the dam body is emptied or even broken due to the action of seismic load.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hydraulic dams, and particularly to a movable joint connection structure for a concrete face rockfill dam. Background Art

[0002] The concrete face of a concrete face rockfill dam is usually composed of two materials, rigid and granular materials. The coordinated deformation of the two materials is the basic guarantee for the safe operation of the dam. In the related art, only temporary horizontal construction joints are provided in the concrete face of the dam according to the construction needs. However, in the direction perpendicular to the dam axis, especially under the action of seismic loads propagating downstream, the rockfill body and the concrete face at the upper part of the dam are prone to separation, resulting in the void under part of the concrete face at the upper part of the dam and even fracture, seriously affecting the safe and stable operation of the dam. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a movable joint connection structure for a concrete face rockfill dam, which can solve the problems of void under the concrete face at the upper part of the dam and even fracture caused by seismic loads in the related art.

[0004] To achieve the above purpose, the present disclosure provides a movable joint connection structure for a concrete face rockfill dam, including: a concrete face, which is used to be arranged on the concrete face rockfill dam and includes an upper concrete face and a lower concrete face arranged at intervals, so as to form a connection joint between the upper concrete face and the lower concrete face; and a movable part, which is arranged in the connection joint and connected between the upper concrete face and the lower concrete face, so that the upper concrete face is rotatably connected to the lower concrete face through the movable part.

[0005] Optionally, the movable part includes a first through-joint steel bar located at the top of the connection joint and a second through-joint steel bar located at the bottom of the connection joint. Both the first through-joint steel bar and the second through-joint steel bar have a U-shaped opening with an end face away from the concrete face and recessed inward.

[0006] Optionally, the connection joint is perpendicular to the water-facing surface of the concrete face and is filled with a caulking material inside.

[0007] Optionally, the caulking material uses a first GB flexible filler and is bonded to the inner wall of the connection joint.

[0008] Optionally, the cross-section of the connection joint is a right trapezoid, and the top opening of the connection joint is smaller than the bottom opening of the connection joint.

[0009] Optionally, the thickness of the connection joint is 5 - 10 cm.

[0010] Optionally, the movable joint connection structure further includes a copper water stop sheet disposed within the connection joint, and the copper water stop sheet is located between the first through-joint steel bar and the second through-joint steel bar.

[0011] Optionally, the movable joint connection structure further includes a waterproof assembly disposed on the water-facing surface of the concrete panel and covering the connection joint.

[0012] Optionally, the waterproof assembly includes a second GB flexible filler bonded to the water-facing surface of the concrete panel and covering the connection joint, and a protective cover wrapped around the outer side of the second GB flexible filler and fixed to the water-facing surface of the concrete panel.

[0013] Optionally, the concrete face rockfill dam includes a dam body having an inclined surface and bedding material, the bedding material is laid on the inclined surface of the dam body, the concrete panel is laid on the bedding material, and the connection joint is 1 m higher than the liquid level of the dead water level of the reservoir at the connection with the water-facing surface of the concrete panel.

[0014] Through the above technical solution, that is, the movable joint connection structure for a concrete face rockfill dam provided by the present disclosure, by providing a movable part within the connection joint between the upper concrete panel and the lower concrete panel, and connecting the movable part between the upper concrete panel and the lower concrete panel, it is possible to rotatably connect the upper concrete panel to the lower concrete panel, so as to achieve the coordinated deformation of the concrete panel with the rockfill body of the concrete face rockfill dam, ensure the stable operation of the concrete face rockfill dam, effectively avoid the risk of fracture of the concrete panel, and have high applicability and good stability. Specifically, when, for example, under the action of seismic loads, the rockfill body above the concrete face rockfill dam is separated from the upper concrete panel, resulting in the void under the upper concrete panel, the water-facing surface of the upper concrete panel is under the action of water pressure, so that the upper concrete panel can rotate toward the side where the rockfill body is located through the movable part, thereby ensuring that the upper concrete panel is always stably attached to the rockfill body above the concrete face rockfill dam. In this way, it is possible to prevent the adverse phenomenon of the void under the upper concrete panel, effectively avoid the risk of fracture of the concrete panel, so as to facilitate ensuring the stable operation of the concrete face rockfill dam and achieve the purpose of seismic safety.

[0015] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0017] Figure 1It is a schematic structural diagram of a movable joint connection structure for a concrete face rockfill dam provided in an exemplary embodiment of the present disclosure;

[0018] Figure 2 It is a schematic diagram of the deformation of the concrete face slab provided in an exemplary embodiment of the present disclosure.

[0019] Description of reference numerals

[0020] 1 - Concrete face slab; 110 - Upper concrete face slab; 120 - Lower concrete face slab; 130 - Connection joint; 140 - Water-facing side; 150 - Upper layer steel mesh; 160 - Lower layer steel mesh; 2 - Movable part; 210 - First joint-passing steel bar; 220 - Second joint-passing steel bar; 3 - U-shaped opening; 4 - Joint filling material; 410 - First GB flexible filler; 5 - Copper waterstop; 6 - Waterproof assembly; 610 - Second GB flexible filler; 620 - Protective cover; 621 - Connection plate; 7 - Cushion material; 8 - Dead water level of the reservoir. Detailed description of the specific implementation mode

[0021] The following will describe the specific implementation mode of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific implementation mode described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0022] In the present disclosure, unless otherwise stated, the orientation terms such as "upper" and "lower" generally refer to the upper and lower in the space when the movable joint connection structure is in the normal use state; "inner" and "outer" refer to the inner and outer relative to the contour of the component or structure itself. In addition, it should be noted that the terms such as "first" and "second" are used to distinguish one element from another, and do not have sequence and importance. In addition, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements.

[0023] According to a movable joint connection structure for a concrete face rockfill dam provided by the present disclosure, referring to Figure 1 and Figure 2 As shown, the movable joint connection structure includes a concrete face slab 1 and a movable part 2. The concrete face slab 1 is used to be arranged on the concrete face rockfill dam and includes an upper concrete face slab 110 and a lower concrete face slab 120 arranged at intervals, so as to form a connection joint 130 between the upper concrete face slab 110 and the lower concrete face slab 120; the movable part 2 is arranged in the connection joint 130 and connected between the upper concrete face slab 110 and the lower concrete face slab 120, so that the upper concrete face slab 110 is rotatably connected to the lower concrete face slab 120 through the movable part 2.

[0024] Through the above technical solution, that is, the movable joint connection structure for the face slab dam provided by the present disclosure, a movable part 2 is arranged in the connection joint 130 between the upper concrete face slab 110 and the lower concrete face slab 120, and the movable part 2 is connected between the upper concrete face slab 110 and the lower concrete face slab 120, so that the upper concrete face slab 110 can be rotatably connected to the lower concrete face slab 120, so as to realize the coordinated deformation of the concrete face slab 1 with the rockfill body of the face slab dam, ensure the stable operation of the face slab dam, effectively avoid the risk of fracture of the concrete face slab 1, and has high applicability and good stability.

[0025] Specifically, when, for example, under the action of seismic loads, the rockfill body above the face slab dam is separated from the upper concrete face slab 110, resulting in the void under the upper concrete face slab 110, the water pressure acting on the water-facing surface 140 of the upper concrete face slab 110 causes the upper concrete face slab 110 to rotate towards the side where the rockfill body is located through the movable part 2, thereby ensuring that the upper concrete face slab 110 is always stably attached to the rockfill body above the face slab dam. In this way, the adverse phenomenon of the void under the upper concrete face slab 110 can be prevented, the risk of fracture of the concrete face slab 1 can be effectively avoided, so as to ensure the stable operation of the face slab dam and achieve the purpose of seismic safety.

[0026] The movable part 2 can be constructed in any suitable manner according to actual application requirements. For example, in some embodiments, with reference to Figure 1 and Figure 2As shown, the movable part 2 may include a first through-seam steel bar 210 located at the top of the connection seam 130 and a second through-seam steel bar 220 located at the bottom of the connection seam 130. Both the first through-seam steel bar 210 and the second through-seam steel bar 220 have a U-shaped opening 3 with an end face away from the concrete panel 1 and recessed inward, so that the upper concrete panel 110 can be rotatably connected to the lower concrete panel 120. Specifically, when, for example, under the action of seismic loads, the rockfill body on the upper part of the face slab dam is separated from the upper concrete panel 110, resulting in the void under the upper concrete panel 110, the water-facing surface 140 of the upper concrete panel 110, under the action of water pressure, causes the upper concrete panel 110 to rotatably turn towards the side where the rockfill body is located through the first through-seam steel bar 210 and the second through-seam steel bar 220. At this time, the opening size of the U-shaped opening 3 of the first through-seam steel bar 210 gradually increases, and the opening size of the U-shaped opening 3 of the second through-seam steel bar 220 gradually decreases, thereby ensuring the smooth rotation of the upper concrete panel 110. In addition, in some embodiments not shown, the first through-seam steel bar 210 and the second through-seam steel bar 220 may also have other suitable shapes such as a V-shaped opening or a W-shaped opening with an end face away from the concrete panel 1 and recessed inward, and the purpose is to facilitate the rotation of the upper concrete panel 110, and the present disclosure does not make specific limitations on this.

[0027] Among them, Figure 1 Exemplarily, it is shown that upper steel mesh 150 and lower steel mesh 160 are uniformly arranged in both the upper concrete panel 110 and the lower concrete panel 120, so as to ensure that the upper concrete panel 110 and the lower concrete panel 120 have good structural strength, good stability and long service life. In addition, the first through-seam steel bar 210 is connected to the upper steel mesh 150 of the upper concrete panel 110 and the lower concrete panel 120, and the second through-seam steel bar 220 is connected to the lower steel mesh 160 of the upper concrete panel 110 and the lower concrete panel 120, so as to facilitate ensuring that the upper concrete panel 110 is stably connected to the lower concrete panel 120 through the first through-seam steel bar 210 and the second through-seam steel bar 220.

[0028] In some embodiments, referring to Figure 1 As shown, the connection seam 130 may be perpendicular to the water-facing surface 140 of the concrete panel 1 and filled with a caulking material 4 inside, so that the caulking material 4 can closely adhere to the inner wall of the connection seam 130, and further effectively prevent the water on the water-facing surface 140 of the concrete panel 1 from seeping into the rockfill body of the face slab dam through the connection seam 130, so as to facilitate ensuring the stable operation of the face slab dam.

[0029] Among them, in such as Figure 1In the illustrated embodiment, the caulking material 4 may adopt the first GB flexible filler 410. Since the first GB flexible filler 410 has high plasticity, heat resistance, cold resistance, and aging resistance, it can ensure that the movable joint connection structure has a long service life. At the same time, the first GB flexible filler 410 also has strong adhesion performance, so that the first GB flexible filler 410 can be tightly bonded to the inner wall of the connection joint 130, which can further ensure a good water stop and anti-seepage effect of the connection joint 130. In addition, the first GB flexible filler 410 also has good deformability and fluidity, so that the upper concrete panel 110 can be rotatably connected to the lower concrete panel 120, and the installation and construction operation of the first GB flexible filler 410 is simple and the work efficiency is high. Of course, in some other embodiments, the filling material may also be configured as an SR flexible water stop material or an IGAS flexible water stop material, and the present disclosure does not make specific limitations thereon.

[0030] In addition, in the embodiment as Figure 1 shown, the cross-section of the connection joint 130 may be a right trapezoid, so that the end surface of the internal caulking material 4 is a right trapezoid, and the top opening of the connection joint 130 is smaller than the bottom opening of the connection joint 130. In this way, it can be ensured that the opening size of the U-shaped opening 3 of the second through-joint steel bar 220 is larger than the opening size of the U-shaped opening 3 of the first through-joint steel bar 210, so as to facilitate the upper concrete panel 110 to rotate towards the side where the rockfill body of the face slab dam is located. At the same time, when the upper concrete panel 110 rotates, the change range of the opening size of the U-shaped opening 3 of the first through-joint steel bar 210 is small, and the change range of the opening size of the U-shaped opening 3 of the second through-joint steel bar 220 is large. This can not only realize the coordinated deformation of the concrete panel 1 and the rockfill body of the face slab dam, but also ensure that the caulking material 4 at the connection between the connection joint 130 and the water-facing surface 140 of the concrete panel 1 is stably connected to the inner wall of the connection joint 130, further enhancing the water stop and anti-seepage effect at the connection joint 130.

[0031] In addition, Figure 2 Exemplarily, the deformation process of the upper concrete panel 110 is shown. Point O is the activity origin of the movable part 2, OB is the water-facing surface 140 of the upper concrete panel 110, OA is the side wall surface of the connection joint 130, OB’ is the water-facing surface 140 of the upper concrete panel 110 after settlement, OA’ is the side wall surface of the connection joint 130 after settlement, and triangle OBB’ and triangle OAA’ are similar triangles. Therefore, the thickness change AA’ of the connection joint 130 can be deduced from the settlement depth BB’ of the upper concrete panel 110. Since the settlement depth of the upper concrete panel 110 is 50 - 80 cm, the thickness c of the connection joint 130 is 5 - 10 cm, so as to better ensure the coordinated deformation of the concrete panel 1 with the rockfill body of the face slab dam.

[0032] In some embodiments, referring to Figure 1 As shown, the movable joint connection structure may further include a copper waterstop sheet 5 disposed within the connection joint 130, and the copper waterstop sheet 5 is located between the first joint-passing steel bar 210 and the second joint-passing steel bar 220, so as to avoid cavities formed due to insufficient compaction of the concrete poured on the upper concrete panel 110 and the lower concrete panel 120, which is conducive to ensuring the stable operation of the concrete panel 1. Among them, the copper waterstop sheet 5 can be clamped and fixed on the steel mesh of the concrete panel 1 by, for example, processed thin steel bars (not shown in the figure). The purpose is to be able to stably arrange the copper waterstop sheet 5 between the first joint-passing steel bar 210 and the second joint-passing steel bar 220. The present disclosure does not make specific limitations herein.

[0033] In some embodiments, referring to Figure 1 As shown, the movable joint connection structure may further include a waterproof assembly 6 disposed on the water-facing surface 140 of the concrete panel 1 and covering the connection joint 130, so as to further enhance the water-stopping and anti-seepage effect of the connection joint 130 and prevent water on the water-facing surface 140 of the concrete panel 1 from seeping into the rockfill body of the face rockfill dam through the connection joint 130, which is conducive to ensuring the stable operation of the face rockfill dam.

[0034] Among them, the waterproof assembly 6 can be constructed in any suitable manner. For example, the waterproof assembly 6 may include a second GB flexible filler 610 bonded to the water-facing surface 140 of the concrete panel 1 and covering the connection joint 130, and a protective cover 620 wrapped around the outside of the second GB flexible filler 610 and fixedly connected to the water-facing surface 140 of the concrete panel 1, so as to effectively block water from seeping into the connection joint 130. And by wrapping the protective cover 620 around the outside of the second GB flexible filler 610, it can prevent the second GB flexible filler 610 from being lost under the action of water pressure, which is conducive to ensuring the stable operation of the second GB flexible filler 610. Among them, Figure 1 Exemplarily, the protective cover 620 is shown to be constructed as a hemispherical shell and covers the outside of the second GB flexible filler 610. The opening ends of the hemispherical shell extend with connecting plates 621. Further, the connecting plates 621 can be fixedly connected to the concrete panel 1 by, for example, fasteners such as bolts and screws, or can be fixedly connected to the concrete panel 1 by, for example, welding. The present disclosure does not make specific limitations herein. In addition, the material of the hemispherical shell can be constructed as, for example, rubber or resin and other materials with certain elastic deformation and relatively high hardness, so as to better protect the second GB flexible filler 610 while ensuring its stable operation, and at the same time, it can better adapt to the deformation of the upper concrete panel 110, which is conducive to further enhancing the water-stopping and anti-seepage effect at the connection joint 130.

[0035] In some embodiments, referring to Figure 1As shown in the figure, the face slab dam includes a dam body with an inclined surface and bedding material 7. The bedding material 7 is laid on the inclined surface of the dam body, and the concrete face slab 1 is laid on the bedding material 7. Since the deformation of the part of the concrete face slab 1 of the face slab dam above the dead water level is the largest, the height distance H between the connection of the joint 130 and the water-facing surface 140 of the concrete face slab 1 and the liquid level of the reservoir dead water level 8 is 1 m, which is beneficial to ensuring the coordinated deformation of the concrete face slab 1 and the rockfill body of the face slab dam. At the same time, if part of the movable joint connection structure is damaged, it is also convenient for the operators to carry out maintenance operations.

[0036] Here, it should be noted that the dam body of the face slab dam usually includes a main rockfill area. And in order to ensure a good water stop and anti-seepage effect, a layer of bedding material is usually set on the main rockfill area as the bedding zone. This bedding material is generally selected from fresh, hard, and non-weathering stones, which can be processed stones, or natural gravel materials, or a mixture of both.

[0037] Based on the above embodiments, the construction process of the movable joint connection structure is described exemplarily in the present disclosure. First, the upper steel mesh 150 of the upper concrete face slab 110 and the lower concrete face slab 120 and the first through-joint steel bars 210 connected between the upper steel meshes 150, as well as the lower steel mesh 160 of the upper concrete face slab 110 and the lower concrete face slab 120 and the second through-joint steel bars 220 connected between the lower steel meshes 160 are laid on the bedding material 7 of the face slab dam. Then, the operators start to pour the lower concrete face slab 120. After the lower concrete face slab 120 is poured, first, the first GB flexible filler 410 is filled in the joint 130 formed by the first through-joint steel bars 210 and the second through-joint steel bars 220, and a water stop copper sheet 5 is arranged between the first through-joint steel bars 210 and the second through-joint steel bars 220. Further, the upper concrete face slab 110 is poured. After the upper concrete face slab 110 is poured, the second GB flexible filler 610 is bonded to the connection of the water-facing surface 140 of the concrete face slab 1 and the joint 130. Finally, the protective cover 620 is wrapped outside the second GB flexible filler 610.

[0038] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0039] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure does not separately describe various possible combination methods.

[0040] In addition, any combination can be made among various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. An active joint connection structure for a concrete face rockfill dam, characterized in that, it includes: a concrete face, which is used to be arranged on the concrete face rockfill dam and includes an upper concrete face and a lower concrete face arranged at intervals, and a connection joint is formed between the upper concrete face and the lower concrete face; and a movable part, which is arranged in the connection joint and connected between the upper concrete face and the lower concrete face, so that the upper concrete face is rotatably connected to the lower concrete face through the movable part; the movable part includes a first joint-passing steel bar located at the top of the connection joint and a second joint-passing steel bar located at the bottom of the connection joint, and both the first joint-passing steel bar and the second joint-passing steel bar have end faces away from the concrete face and U-shaped openings that are recessed inward.

2. The active joint connection structure for a concrete face rockfill dam according to claim 1, characterized in that, the connection joint is perpendicular to the water-facing surface of the concrete face and is filled with a caulking material inside.

3. The active joint connection structure for a concrete face rockfill dam according to claim 2, characterized in that, the caulking material uses a first GB flexible filler and is bonded to the inner wall of the connection joint.

4. The active joint connection structure for a concrete face rockfill dam according to claim 2, characterized in that, the cross-section of the connection joint is in the shape of a right trapezoid, and the top opening of the connection joint is smaller than the bottom opening of the connection joint.

5. The active joint connection structure for a concrete face rockfill dam according to claim 2, characterized in that, the thickness of the connection joint is 5 - 10 cm.

6. The active joint connection structure for a concrete face rockfill dam according to claim 1, characterized in that, the active joint connection structure further includes a water-stop copper sheet arranged in the connection joint, and the water-stop copper sheet is located between the first joint-passing steel bar and the second joint-passing steel bar.

7. The active joint connection structure for a concrete face rockfill dam according to claim 1, characterized in that, the active joint connection structure further includes a waterproof assembly arranged on the water-facing surface of the concrete face and covering the connection joint.

8. The active joint connection structure for a concrete face rockfill dam according to claim 7, characterized in that, the waterproof assembly includes a second GB flexible filler bonded to the water-facing surface of the concrete face and covering the connection joint, and a protective cover wrapped outside the second GB flexible filler and fixed to the water-facing surface of the concrete face.

9. The active joint connection structure for a concrete face rockfill dam according to claim 1, characterized in that, the concrete face rockfill dam includes a dam body with an inclined surface and cushion material, the cushion material is laid on the inclined surface of the dam body, the concrete face is laid on the cushion material, and the connection part between the connection joint and the water-facing surface of the concrete face is 1 m higher than the liquid level of the dead water level of the reservoir.

Images