Plug-in joint structure for mixed dam

Abstract

The invention relates to the technical field of water conservancy projects, in particular to a plug-in joint structure for a mixed dam. The connecting structure comprises a connecting section used for connecting the concrete faced rockfill dam and the gravity dam. The connecting section and the concrete faced rockfill dam are integrally formed, and one end of the connecting section is provided with an inserting groove for the gravity dam to be inserted in; according to the plug-in type connector structure for the mixed dam, movement of the flexible water stop block is controlled through the filled lossable filler, the lossable filler which blocks the flexible water stop block originally can be flushed out by water flow through the impact force of the water flow during water seepage, and therefore water seepage is avoided. And the flexible water stop block is pushed to move towards the end part of the gravity dam through the water pressure on the upstream side, so that the temporary water stop at the joint of the gravity dam and the connecting section is automatically realized, the workload of repair operation is reduced, and the water stop efficiency is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, in particular to an insertion type joint structure for a hybrid dam. Background Art

[0002] A hybrid dam is a type of dam that is a combination of a gravity dam and a panel dam. It is widely used because it has the advantages of both concrete dams and panel dams and is relatively economical. The panel dam is connected to the concrete dam, generally in the form of wing wall or insertion.

[0003] The specific structure of this type is: insert the variable cross-section concrete dam into the panel dam for a certain distance, and wrap the concrete dam with a smaller cross-section with the panel dam. The upstream and downstream slopes of the panel dam at the joint remain unchanged, and the semi-inserted section of the concrete is wrapped with a 90° cone (this part of the panel dam is referred to as the wrapping head). However, due to the different stiffness of the two dam types, the joint deformation difference is large and the stress distribution is uneven. Different seismic responses will be generated during earthquakes, and relative settlement and tension cracks are prone to occur. It is the weakest part of the dam body and also the key part of the hybrid dam design.

[0004] When cracks appear at the joints of the hybrid dam, water from the upstream will seep into the downstream through the cracks, which will cause soil loss inside the panel dam over a long period of time. For this reason, waterproof repair treatment is also required.

[0005] In the traditional repair process, since the repair project takes a long time, in order to avoid excessive soil loss inside the panel dam, people need to stop the water seepage first, and then carry out the repair work after the temporary water stoppage of the water seepage part is completed. However, the traditional water stop method needs to rely on people to do it manually, which not only increases the workload of the repair work, but also is not conducive to quickly stop the water seepage part in the first time. Summary of the invention

[0006] The object of the present invention is to provide an insertion type joint structure for a hybrid dam to solve the problems raised in the above background technology.

[0007] To achieve the above object, an insert joint structure for a hybrid dam is provided, comprising a connecting section for connecting a panel dam and a gravity dam; the connecting section and the panel dam are integrally formed, and one end of the connecting section has a slot for inserting the gravity dam; a water stop assembly is also provided inside the connecting section, and the water stop assembly at least comprises:

[0008] The movable water-stop mechanism uses the water pressure on the upstream side to move toward the gravity dam;

[0009] A loseable filler is located on the moving path of the movable water-stopping mechanism to limit the movement of the movable water-stopping mechanism;

[0010] and a diversion mechanism for directing water flow during water seepage to the place where the filler can be lost;

[0011] When water seepage occurs between the gravity dam and the connecting section, the diversion mechanism causes the water flow to flush the lost filler, causing the lost filler to escape from the moving path of the movable water-stopping mechanism, thereby allowing the movable water-stopping mechanism to use the water pressure on the upstream side to stop the water flow at the connection between the connecting section and the gravity dam.

[0012] As a further improvement of the technical solution, the water-stop assembly includes a shell arranged longitudinally inside the connecting section, and the movable water-stop mechanism is movably arranged inside the shell;

[0013] The top of the shell is in an open state, the bottom is in a closed state, and an opening is provided on the side of the shell facing the gravity dam so that the movable water-stopping mechanism can contact the end surface of the gravity dam.

[0014] As a further improvement of the technical solution, the shell is in a "convex" shape with a narrow opening side and a wide opening side.

[0015] As a further improvement of the technical solution, the movable water-stopping mechanism includes a piston block arranged inside the shell, the side wall of the piston block close to the opening is in contact with the side wall of the opening, and the side wall of the piston block facing the panel dam is in contact with the inner wall of the shell, so that the piston block divides the inside of the shell into a water storage chamber and a restriction chamber;

[0016] The water storage chamber is close to the flow guide tube, and the restriction chamber is close to the opening;

[0017] A flexible water stop block is fixedly provided on one end of the piston block facing the gravity dam;

[0018] The drainable filler is packed in the restricted cavity in a compacted manner.

[0019] As a further improvement of the technical solution, the side of the shell facing the panel dam is connected to a guide pipe, and the side facing the downstream side is connected to a drainage pipe;

[0020] One end of the guide pipe is connected to the water storage chamber, and the other end passes through the upstream side of the connecting section to guide the water on the upstream side to the inside of the housing to apply thrust to the piston block;

[0021] One end of the drain pipe is communicated with the limiting cavity, and the other end passes through the downstream side of the connecting section, so as to discharge the loseable filler inside the shell when water seepage occurs.

[0022] As a further improvement of the technical solution, the side wall of the opening close to the upstream side is thick at one end and thin at the other end;

[0023] The thinner end of the opening is disposed adjacent to the restriction chamber;

[0024] The flow guiding mechanism is a water inlet channel, and the water inlet channel is formed between the thinner end of the opening and the side wall of the piston block.

[0025] As a further improvement of the technical solution, a through drainage channel is provided on the side wall of the protruding end of the piston block.

[0026] As a further improvement of the technical solution, one end of the drain pipe is in a closed state, and a plurality of openings are provided at the closed end.

[0027] As a further improvement of the technical solution, the flow guiding mechanism includes a shunt pipe having one end connected to the flow guiding pipe and the other end penetrating the shell and connected to the limiting chamber; a sealing block is fixedly provided on the inner wall of the shell at the penetration point of the shunt pipe, and a pressure rod is connected to the bottom of the sealing block, and one end of the pressure rod slides through the shell and extends to the bottom of the gravity dam;

[0028] When the gravity dam sinks, the gravity dam applies force to the sealing block through the pressure rod, so that the connection between the sealing block and the shell is destroyed, thereby causing the water in the diversion pipe to flow into the restriction chamber.

[0029] As a further improvement of the technical solution, the connection strength between the pressure rod and the sealing block is greater than the connection strength between the sealing block and the housing.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. In the plug-in joint structure used for the hybrid dam, the movement of the flexible water stop block is controlled by the filled lost filler. When water seepage occurs, the impact force of the water flow can be used to flush out the lost filler that originally blocked the flexible water stop block, and the water pressure on the upstream side can be used to push the flexible water stop block to move toward the end of the gravity dam, thereby automatically realizing temporary water stopping at the connection between the gravity dam and the connecting section, which not only reduces the workload of the repair work, but also improves the efficiency of water stopping.

[0032] 2. In the plug-in joint structure for the hybrid dam, due to the setting of the drainable filler, the flexible water stop block does not fit tightly with the gravity dam under normal circumstances. It only uses water pressure to fit tightly with the gravity dam when water seepage occurs, thereby increasing the service life of the flexible water stop block. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the connecting section of the present invention;

[0035] Figure 3It is a structural schematic diagram of the water-stopping mechanism of the present invention;

[0036] Figure 4 It is a schematic diagram of the structure of the lost material of the present invention;

[0037] Figure 5 It is a structural schematic diagram of the drainage channel of the present invention;

[0038] Figure 6 It is a structural schematic diagram of the drainage pipe of the present invention;

[0039] Figure 7 It is a schematic diagram of the local structure of the connecting section of the present invention;

[0040] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at A;

[0041] Fig. 9 It is a structural schematic diagram of the shunt pipe of the present invention;

[0042] Fig.10 It is a structural schematic diagram of the sealing block of the present invention;

[0043] Fig.11 It is a structural schematic diagram of the pressure rod of the present invention.

[0044] The meaning of each number in the figure is:

[0045] 100, panel dam; 101, upstream side; 102, downstream side; 110, gravity dam; 200, connecting section; 201, reinforced concrete panel; 202, toe board; 203, slot; 210, water stop assembly; 211, shell; 212, opening; 213, guide pipe; 214, drain pipe; 215, water storage chamber; 216, restriction chamber; 217, water inlet channel; 218, lost filler; 220, piston block; 221, flexible water stop block; 222, drain channel; 230, diverter pipe; 231, sealing block; 232, pressure rod. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] The panel dam 100 is also called an earth dam. The panel dam 100 can be formed by piling up local materials (such as soil, gravel, etc.). The overall shape is a trapezoid that is narrow at the top and wide at the bottom. The toe plate 202 is based on the strongly weathered layer of the bedrock. Among them, the upstream side 101 used for water retention adopts a reinforced concrete panel 201 structure to prevent water from seeping into the panel dam 100. The gravity dam 110 is formed by pouring concrete materials, one end of which is inserted into the panel dam 100, and together with the panel dam 100, it forms a mixed dam.

[0050] Due to the different stiffness of the two dam types, the joint deformation of the hybrid dam is greatly different and the stress distribution is uneven, which will produce different seismic responses during an earthquake, and relative settlement and tension cracks are prone to occur, resulting in water leakage at the connection between the panel dam 100 and the gravity dam 110.

[0051] To this end, the present invention provides an insertion joint structure for a hybrid dam, such as Figure 1 As shown, it includes a connecting section 200 for connecting the panel dam 100 and the gravity dam 110. The connecting section 200 and the panel dam 100 are built in an integral manner, and the slope of the connecting section 200 on both sides of the upstream side 101 and the downstream side 102 is the same as the slope of the panel dam 100. The upstream side 101 of the connecting section 200 is also cast with a reinforced concrete panel 201 to prevent water from penetrating into the connecting section 200.

[0052] like Figure 2As shown, during the construction of the connecting section 200, a support is built at one end of the connecting section 200 close to the panel dam 100 to support the filler (such as soil, gravel, etc.), and after the construction of the connecting section 200 is completed, the support at one end of the connecting section 200 is taken out. At this time, a slot 203 is formed at one end of the connecting section 200, and the shape of the slot 203 corresponds to the end of the gravity dam 110, so that the panel dam 100 can be inserted, thereby realizing the connection between the gravity dam 110 and the connecting section 200.

[0053] In addition, the end of the connecting section 200 close to the gravity dam 110 is a 90° conical structure (refer to Figure 2 The shape of the end of the connecting section 200 is used to reduce the principal stress of the connecting section 200.

[0054] It should be understood that the support is, for example, a template, and multiple templates are combined into a shape corresponding to the gravity dam 110. In this way, during the construction of the connecting section 200, the template corresponding to the shape of the gravity dam 110 can support the stacked filler, thereby obtaining the slot 203 after filling.

[0055] A water-stop assembly 210 is also provided inside the connecting section 200, and the water-stop assembly 210 includes a movable water-stop mechanism, a diversion mechanism, and a lost filler 218 (such as soil, gravel, etc.), wherein the movable water-stop mechanism utilizes the water pressure of the upstream side 101 to move toward the gravity dam 110; the lost filler 218 is located on the moving path of the movable water-stop mechanism, and is used to limit the movement of the movable water-stop mechanism; when water seepage occurs between the gravity dam 110 and the connecting section 200, the diversion mechanism guides the water to the lost filler 218, forcing the lost filler 218 to be washed by water and to leave the moving path of the movable water-stop mechanism, thereby enabling the movable water-stop mechanism to utilize the water pressure of the upstream side 101 to stop the water at the connection portion between the connecting section 200 and the gravity dam 110.

[0056] like Figure 3 As shown, the water stop assembly 210 includes a shell 211 embedded in the connection section 200 in a longitudinal manner, and the shell 211 is preferably made of a steel plate. The movable water stop mechanism is movably arranged in the shell 211. When installing the shell 211, firstly, a groove is reserved at the top of the connection section 200 during the filling process, one side of the groove is connected to the slot 203, and then the shell 211 is placed in the groove.

[0057] The top of the housing 211 is open (to facilitate the subsequent addition of the drainable filler 218, and a cover plate can be set for sealing later), and the bottom is closed. The housing 211 is provided with an opening 212 on one side facing the gravity dam 110, so that the movable water stop mechanism can contact the end surface of the gravity dam 110.

[0058] like Figure 4As shown, the housing 211 is in a "convex" shape with a narrow side of the opening 212 and a wide other side.

[0059] The movable water-stopping mechanism includes a piston block 220 disposed inside the housing 211. The side wall of the piston block 220 at one end close to the opening 212 is in contact with the side wall of the opening 212, and the side wall at the end facing the panel dam 100 is in contact with the inner wall of the housing 211. In this way, the piston block 220 divides the interior of the housing 211 into two spaces, one is a water storage chamber 215 (close to the flow guide pipe 213), and the other is a limiting chamber 216 (close to the opening 212). A flexible water-stopping block 221 is fixedly disposed at one end of the piston block 220 facing the gravity dam 110. The flexible water-stopping block 221 is preferably made of rubber material. The rubber is soft and can improve the sealing performance with the end face of the gravity dam 110. The width of the flexible water-stopping block 221 is smaller than the width of the opening 212 to allow water to flow in. At the same time, the lost filler 218 is filled in the limiting cavity 216 by compaction, and the compaction can prevent the lost filler 218 from being lost under natural conditions (non-water seepage conditions).

[0060] That is to say, the movement of the flexible water stop block 221 is controlled by the filled lost filler 218. When water seepage occurs, the impact force of the water flow can be used to flush out the lost filler 218 that originally blocked the flexible water stop block 221, and the water pressure on the upstream side 101 can be used to push the flexible water stop block 221 toward the end of the gravity dam 110, thereby automatically achieving temporary water stopping at the connection between the gravity dam 110 and the connecting section 200, which not only reduces the workload of the repair work, but also improves the efficiency of water stopping.

[0061] In addition, due to the provision of the lost filler 218 , the flexible water stop block 221 is not tightly fitted to the gravity dam 110 under normal conditions, and only when water seepage occurs will it tightly fit to the gravity dam 110 using water pressure, thereby increasing the service life of the flexible water stop block 221 .

[0062] Furthermore, the outer shell 211 is connected to a guide pipe 213 on the side facing the panel dam 100, and is connected to a drain pipe 214 on the side facing the downstream side 102; one end of the guide pipe 213 is connected to the water storage chamber 215, and the other end passes through the upstream side 101 of the connecting section 200, so as to guide the water on the upstream side 101 to the inside of the outer shell 211 and apply thrust to the piston block 220; one end of the drain pipe 214 is connected to the limiting chamber 216, and the other end passes through the downstream side 102 of the connecting section 200, so as to discharge the lost filler 218 inside the outer shell 211 when water seepage occurs.

[0063] In some embodiments, the side wall of the opening 212 close to the upstream side 101 is thick at one end and thin at the other end, and the thinner end of the opening 212 is disposed close to the restriction chamber 216. The flow guide mechanism is a water inlet channel 217, which is formed between the thinner end of the opening 212 and the side wall of the piston block 220.

[0064] When the water flow of the seepage enters the limiting chamber 216 through the water inlet channel 217, it is necessary to flush the loseable filler 218, so that the loseable filler 218 is flushed out through the drain pipe 214. Figure 5 As shown, the side wall of the protruding end of the piston block 220 is provided with a through drainage channel 222 . When water flows into one end of the limiting chamber 216 , the water can flow to the other end through the drainage channel 222 , thereby flushing the drainable filler 218 in the limiting chamber 216 .

[0065] Moreover, Figure 6 As shown, one end of the drain pipe 214 is in a closed state, and a plurality of openings are provided at the closed end. The plurality of openings are provided to reduce the discharge efficiency of the drain pipe 214, and the loss speed of the connecting section 200 under natural conditions can be reduced.

[0066] Working principle:

[0067] Combination Figure 7 and Figure 8 Under normal conditions, water on the upstream side 101 flows into the water storage chamber 215 through the flow guide pipe 213, and applies a thrust to the piston block 220 to move toward the gravity dam 110. At the same time, the loseable filler 218 is filled in the restriction chamber 216 to restrict the movement of the piston block 220, and at this time, the flexible water stop block 221 will not fit tightly against the end of the gravity dam 110.

[0068] When water seepage occurs between the gravity dam 110 and the connecting section 200, Figure 8 As shown, the water of the gravity dam 110 will flow into the water inlet channel 217 through the gap between the gravity dam 110 and the connecting section 200, and then flow into the limiting chamber 216 through the water inlet channel 217, and finally be discharged through the drain pipe 214. In the process of water flowing in the limiting chamber 216, the water will continuously take away the lost filler 218 in the limiting chamber 216, so that the amount of lost filler 218 is reduced. When the amount of lost filler 218 is reduced, the water in the water storage chamber 215 will push the piston block 220 and the flexible water stop block 221 toward the end of the gravity dam 110, so that the end of the flexible water stop block 221 is tightly fitted with the end of the gravity dam 110. Thereby, temporary water stopping is achieved on the upstream side 101. At the same time, the side wall of the piston block 220 blocks the water inlet channel 217 after moving, preventing the water flow from being continuously discharged through the water inlet channel 217.

[0069] In other embodiments, Figure 9-11 As shown, the flow guiding mechanism includes a shunt pipe 230 having one end connected with the flow guiding pipe 213 and the other end penetrating the housing 211 and connected with the limiting chamber 216; a sealing block 231 is fixedly provided on the inner wall of the housing 211 at the penetration of the shunt pipe 230, and a pressure rod 232 is connected to the bottom of the sealing block 231, and one end of the pressure rod 232 slides through the housing 211 and extends to the bottom of the gravity dam 110. When the gravity dam 110 sinks, the gravity dam 110 applies a force to the pressure rod 232 through the pressure rod 232, so that the connection between the pressure rod 232 and the housing 211 is destroyed, thereby causing the water in the shunt pipe 230 to flow into the limiting chamber 216.

[0070] It can be seen that under normal conditions, part of the water in the flow guide tube 213 enters the diverter tube 230 and is blocked by the sealing block 231. At this time, the water in the diverter tube 230 cannot enter the limiting chamber 216. When the gravity dam 110 sinks, the gravity dam 110 sinks downward and presses the pressure rod 232 downward, and the pressure rod 232 moves downward to drive the sealing block 231 downward. When the downward force on the pressure rod 232 is greater than the connection strength between the sealing block 231 and the housing 211, a crack may be generated between the sealing block 231 and the housing 211. At this time, the water in the diverter tube 230 can flow into the limiting chamber 216 to flush the lost filler 218.

[0071] For example, the sealing block 231 and the housing 211 are both made of metal materials, and during the connection process, the sealing block 231 and the housing 211 are connected by welding. The connection strength between the pressure rod 232 and the sealing block 231 should be greater than the connection strength between the sealing block 231 and the housing 211. In this way, when the gravity dam 110 sinks, the gravity dam 110 can use its own weight to press the sealing block 231 away from the housing 211 through the pressure rod 232.

[0072] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An insertion joint structure for a hybrid dam, comprising a connecting section (200) for connecting a panel dam (100) and a gravity dam (110); the connecting section (200) and the panel dam (100) are integrally formed, and one end of the connecting section (200) has a slot (203) for inserting the gravity dam (110); the characteristics are: A water-stop component (210) is also provided inside the connecting section (200), and the water-stop component (210) comprises at least: The movable water-stopping mechanism is moved toward the gravity dam (110) by utilizing the water pressure on the upstream side (101); A loseable filler (218) is located on the moving path of the movable water-stopping mechanism to limit the movement of the movable water-stopping mechanism; and a diversion mechanism for guiding the water flow during water seepage to the drainable filler (218); When water seepage occurs between the gravity dam (110) and the connecting section (200), the diversion mechanism causes the water flow to flush the lost filler (218), causing the lost filler (218) to escape from the moving path of the movable water-stopping mechanism, thereby allowing the movable water-stopping mechanism to use the water pressure on the upstream side (101) to stop the connection between the connecting section (200) and the gravity dam (110).

2. The plug-in joint structure for a hybrid dam according to claim 1, characterized in that: The water-stop assembly (210) comprises an outer shell (211) disposed longitudinally inside the connecting section (200), and the movable water-stop mechanism is movably disposed inside the outer shell (211); The top of the shell (211) is in an open state, and the bottom is in a closed state, and an opening (212) is provided on the side of the shell (211) facing the gravity dam (110) so that the movable water-stopping mechanism can contact the end surface of the gravity dam (110).

3. The plug-in joint structure for a hybrid dam according to claim 2, characterized in that: The housing (211) is in the shape of a "convex" character with a narrow opening (212) side and a wide opening (212) side.

4. The plug-in joint structure for a hybrid dam according to claim 2, characterized in that: The movable water-stopping mechanism comprises a piston block (220) arranged inside the housing (211); the side wall of the piston block (220) at one end close to the opening (212) is in contact with the side wall of the opening (212), and the side wall at one end facing the panel dam (100) is in contact with the inner wall of the housing (211), so that the piston block (220) divides the interior of the housing (211) into a water storage chamber (215) and a limiting chamber (216); The water storage chamber (215) is close to the flow guide tube (213), and the limiting chamber (216) is close to the opening (212); A flexible water stop block (221) is fixedly provided at one end of the piston block (220) facing the gravity dam (110); The lost filler (218) is filled in the limiting cavity (216) in a compacted manner.

5. The plug-in joint structure for a hybrid dam according to claim 4, characterized in that: The side of the shell (211) facing the panel dam (100) is connected to a flow guide pipe (213), and the side facing the downstream side (102) is connected to a drainage pipe (214); One end of the guide tube (213) is in communication with the water storage chamber (215), and the other end thereof passes through the upstream side (101) of the connecting section (200) so as to guide water on the upstream side (101) into the interior of the housing (211) and exert thrust on the piston block (220); One end of the drainage pipe (214) is in communication with the limiting chamber (216), and the other end thereof passes through the downstream side (102) of the connecting section (200), and is used to discharge the drainable filler (218) inside the housing (211) when water seepage occurs.

6. The plug-in joint structure for a hybrid dam according to claim 5, characterized in that: The side wall of the opening (212) close to the upstream side (101) is thick at one end and thin at the other end; The thinner end of the opening (212) is disposed close to the limiting cavity (216); The flow guiding mechanism is a water inlet channel (217), and the water inlet channel (217) is formed between the thinner end of the opening (212) and the side wall of the piston block (220).

7. The plug-in joint structure for a hybrid dam according to claim 4, characterized in that: A through drainage channel (222) is provided on the side wall of the protruding end of the piston block (220).

8. The plug-in joint structure for a hybrid dam according to claim 5, characterized in that: One end of the drainage pipe (214) is in a closed state, and a plurality of openings are provided at the closed end.

9. The plug-in joint structure for a hybrid dam according to claim 5, characterized in that: The flow guiding mechanism comprises a flow diversion tube (230) having one end in communication with the flow diversion tube (213) and the other end penetrating the outer shell (211) and in communication with the limiting chamber (216); a sealing block (231) is fixedly provided on the inner wall of the outer shell (211) at the penetration point of the flow diversion tube (230); a pressure rod (232) is in communication with the bottom of the sealing block (231); one end of the pressure rod (232) slides through the outer shell (211) and extends to the bottom of the gravity dam (110); When the gravity dam (110) sinks, the gravity dam (110) applies a force to the sealing block (231) through the pressure rod (232), so that the connection between the sealing block (231) and the housing (211) is destroyed, thereby causing the water in the diversion pipe (230) to flow into the limiting chamber (216).

10. The plug-in joint structure for a hybrid dam according to claim 9, characterized in that: The connection strength between the pressure rod (232) and the sealing block (231) is greater than the connection strength between the sealing block (231) and the housing (211).

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