CN215329723U - Rubber dam equipment - Google Patents

Abstract

The utility model provides double-layer rubber dam equipment, and particularly relates to the technical field of hydraulic engineering. The rubber dam apparatus includes: the longitudinal ends of the first dam bag are respectively connected with the two concrete side plates in a sealing manner, and the first dam bag, the concrete bottom plate and the concrete side plates are encircled to form a first cavity; the second dam bag is located on one side of the first dam bag and attached to the first dam bag, the highest point of the second cavity is higher than that of the first cavity, and a connecting hole used for communicating the first cavity with the second cavity is formed in the attachment position of the first dam bag and the second dam bag. And enabling the elevation of the top surface of the second dam bag to be higher than the upstream water level, so that the upstream water cannot overflow from the top surface of the second dam bag, and beautifying the appearance of the whole rubber dam by utilizing the second dam bag positioned at the top of the first dam bag and attached to the first dam bag.

Description

Rubber dam equipment

Technical Field

The utility model relates to the technical field of hydraulic engineering, in particular to rubber dam equipment.

Background

The rubber dam is a bag-type water-retaining dam made up by using high-strength synthetic fibre fabric as stress skeleton, coating rubber layer as protective layer, making it into adhesive tape, anchoring it on the base plate to form a closed dam bag and using water (gas) to inflate it by means of charging and discharging pipeline. The dam top can overflow, the dam height can be adjusted according to needs, and the upstream water level is controlled, so that the benefits of irrigation, power generation, shipping, flood control, moisture blocking and the like are achieved. Therefore, the rubber dam is especially important for river channel construction.

In addition, along with the continuous enhancement of the awareness of beautifying the environment of people, the greening and beautifying of the river channel are also continuously improved, and although the existing rubber dam brings a lot of benefits in the aspect of river channel utilization, the shape of the existing rubber dam is not coordinated with the river channel, so that the greening and beautifying of the river channel are seriously influenced. In addition, the existing rubber dam is inconvenient to install, especially, a pipeline for filling and discharging gas or liquid into the rubber dam is complex to arrange, and the problems that the heights of the tops of the rubber dams are not uniform exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that the shape of the existing rubber dam is not coordinated with a river channel to a certain extent, the greening and beautifying of the river channel are seriously influenced, in addition, the existing rubber dam is inconvenient to install, particularly, the arrangement of pipelines for filling and discharging gas or liquid into the rubber dam is complicated, the height of the top of the rubber dam is not uniform, and the like.

For this purpose, the present invention provides a rubber dam apparatus, which is disposed in a concrete waterway including a concrete bottom plate and two concrete side plates, the two concrete side plates being erected on both sides of the concrete bottom plate, and the rubber dam apparatus includes:

the longitudinal two ends of the first dam bag are respectively connected with the two concrete side plates in a sealing mode, the two ends of the cross section of the first dam bag are respectively connected with the concrete bottom plate in a sealing mode, and the first dam bag, the concrete bottom plate and the concrete side plates are encircled to form a first cavity;

the second dam bag is positioned on one side of the first dam bag and attached to the first dam bag, the two longitudinal ends of the second dam bag are respectively connected with the two concrete side plates in a sealing mode, the two ends of the cross section of the second dam bag are respectively connected with the concrete bottom plate in a sealing mode, the second dam bag, the concrete bottom plate and the concrete side plates are enclosed to form a second cavity, the highest point of the second cavity is higher than that of the first cavity, a connecting hole used for communicating the first cavity with the second cavity is formed in the attachment position of the first dam bag and the second dam bag, and the second dam bag (300) is arranged on the first dam bag 200; and

the charging and discharging pipe is arranged in the concrete bottom plate and communicated with the first cavity through a plurality of auxiliary pipes.

Preferably, on a cross section perpendicular to the longitudinal direction of the first dam bag and the second dam bag, the projected area of the first cavity is larger than the projected area of the second cavity.

Preferably, a plurality of the connection holes are arranged in a plurality of rows, and the plurality of the connection holes of each row are arranged along the longitudinal direction of the first dam bag.

Preferably, the joint of the first dam bag and the second dam bag is of an integrated structure.

Preferably, the apparatus further comprises a sealing connection assembly, and the first dam bag and the second dam bag are connected with the concrete bottom plate through the sealing connection assembly.

Preferably, the seal connection assembly comprises a threaded connection, a pressure plate and a nut; the top surface of the concrete bottom plate is provided with a groove body, the bottom wall of the groove body is provided with a mounting hole, and the groove body extends along the longitudinal direction of the first dam bag; the end parts of the cross sections of the first dam bag and the second dam bag are arranged in the groove body, the bottom end of the threaded connecting piece is fixed in the mounting hole, and the top end of the threaded connecting piece is suitable for extending out of the mounting hole, sequentially penetrates through the end parts and the pressing plate and is connected with the nut.

Preferably, the threaded connection is L-shaped, and the sealing connection assembly further comprises: a lower backing plate, a bottom gasket, a water stop sheet and a reinforcing sheet,

the top of the lower backing plate is provided with two parallel convex edges, a plurality of threaded connectors are sequentially arranged between the two convex edges, the lower backing plate is arranged in the groove body,

the bottom gasket, the water stop sheet, the end parts of the cross sections of the first dam bag and the second dam bag in the length direction, the reinforcing sheet and the pressing plate are sequentially stacked from bottom to top, the nut is pressed on the pressing plate,

the bottom surface of the pressing plate is provided with two strip-shaped grooves which are arranged in parallel, and the strip-shaped grooves and the convex ribs are arranged in a one-to-one correspondence mode.

Preferably, two ends of the cross section of the second dam bag are in sealing connection with the same groove body and the concrete bottom plate.

Preferably, this equipment still includes two levelling device, two levelling device installs respectively the top of second dam bag is close to respectively corresponding the concrete curb plate, levelling device includes level sensor and driving pump, level sensor installs the top of second dam bag and along the second dam bag deviates from the side downwardly extending of first dam bag, and two level sensor's mounting height is the same, driving pump with the second cavity intercommunication, driving pump is used for as two when the difference in height of water level that level sensor detected reaches the setting value, the drive is discharged gas or liquid in the second cavity.

Preferably, the equipment further comprises an overpressure overflow pipe, the overpressure overflow pipe is U-shaped and fixed with the concrete side plate, the bottom end of the overpressure overflow pipe is communicated with the first cavity, and the top end of the overpressure overflow pipe is placed above the second dam bag.

When the rubber dam needs to be lifted up, gas or liquid is filled into the first cavity through the filling and discharging pipe and the auxiliary pipe, so that the first dam bag is expanded and inflated, and the second dam bag is lifted up due to the fact that the highest point of the second cavity is higher than the highest point of the first cavity and a connecting hole for communicating the first cavity with the second cavity is formed in the joint of the first dam bag and the second dam bag, so that water in a river channel flows from the second dam bag to the first dam bag, and the second dam bag is located at the upstream; therefore, by adjusting the heights of the first dam bag and the second dam bag, the height of the upstream water is lower than the height of the top surface of the second dam bag, so that the upstream water cannot overflow from the top surface of the second dam bag, and the second dam bag is positioned on one side of the first dam bag and attached to the first dam bag, so that the front side of the second dam bag protrudes forwards in the direction perpendicular to the river channel, and the appearance of the whole rubber dam is beautified.

In addition, the bottom of the first dam bag is directly connected with the bottom of the concrete bottom plate in a sealing mode, only one pipe for filling and discharging is arranged at the bottom of the first cavity, gas or liquid is filled and discharged into the first cavity through the auxiliary pipes through the pipe for filling and discharging, then the gas or liquid filled and discharged is conveyed into the second cavity through the connecting holes, and therefore smooth filling and discharging of the gas or liquid in the first cavity and the second cavity is achieved, and the pipeline arrangement is achieved only through the pipe for filling and discharging, the auxiliary pipes and the connecting holes, therefore the complexity of arrangement of the pipeline in the rubber dam is reduced, and the manufacturing and construction period and cost of the rubber dam are reduced.

Drawings

FIG. 1 is a schematic front view of the rubber dam apparatus of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional side view of the rubber dam apparatus of an embodiment of the present invention;

fig. 3 is an enlarged view of fig. 2 at P.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience in 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 in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Also, in the drawings, the Z-axis represents a vertical, i.e., up-down position, and a positive direction of the Z-axis (i.e., an arrow direction of the Z-axis) represents up, and a negative direction of the Z-axis (i.e., a direction opposite to the positive direction of the Z-axis) represents down; in the drawings, the X-axis represents the front-back direction along the river, i.e. the flow direction of the water flow along the river, and the positive direction of the X-axis (i.e. the arrow direction of the X-axis) represents the front side, and the negative direction of the X-axis (i.e. the direction opposite to the positive direction of the X-axis) represents the back side; the Y-axis in the drawing indicates the direction perpendicular to the front and back of the river, i.e., the left and right sides of the river.

It should also be noted that the foregoing Z-axis, X-axis, and Y-axis representations are merely intended to facilitate the description of the utility model and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be oriented, constructed or operated in a particular orientation and therefore should not be construed as limiting the utility model.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

It should be noted that the term "connect" in this embodiment includes a detachable connection and a non-detachable connection, that is, the term "connect" in this embodiment may be a detachable connection or a non-detachable connection, and the non-detachable connection may also be referred to as a fixed connection; however, if the connection is not explicitly indicated as detachable connection or non-detachable connection in this embodiment, the detachable connection and the non-detachable connection are considered to be applicable, and the specific use of the detachable connection or the non-detachable connection may be determined according to specific implementation conditions of a specific implementation process, so that the "connection" will not be correspondingly explained in the following of this embodiment.

In addition, the "setting" mentioned in the present embodiment includes the case of mounting, fixing, and connecting, that is, the "setting" mentioned in the present embodiment may be at least one of mounting, fixing, and connecting, and therefore, the "setting" will not be explained accordingly in the following of the present embodiment.

Referring to fig. 1 and 2, the present embodiment provides a rubber dam apparatus provided in a concrete waterway including a concrete bottom plate 110 and two concrete side plates 120, the two concrete side plates 120 being erected on both sides of the concrete bottom plate 110, including:

the two longitudinal ends of the first dam bag 200 are respectively connected with the two concrete side plates 120 in a sealing manner, the two ends of the cross section of the first dam bag 200 are respectively connected with the concrete bottom plate 110 in a sealing manner, and the first dam bag 200, the concrete bottom plate 110 and the concrete side plates 120 surround to form a first cavity 210;

the longitudinal direction of the first dam bag 200 refers to the width direction of the river channel, i.e. the Y-axis direction, and the transverse direction of the cross section of the first dam bag 200 refers to the flow direction of the river channel, i.e. the X-axis direction.

A second dam bag 300, wherein the second dam bag 300 is located on one side of the first dam bag 200 and is attached to the first dam bag 200, two longitudinal ends of the second dam bag 300 are respectively connected to the two concrete side plates 120 in a sealing manner, two ends of the cross section of the second dam bag 300 are respectively connected to the concrete bottom plate 110 in a sealing manner, the second dam bag 300, the concrete bottom plate 110 and the concrete side plates 120 enclose to form a second cavity 310, the highest point of the second cavity 310 is higher than that of the first cavity 210, and a connecting hole for communicating the first cavity 210 with the second cavity 310 is formed at the attachment position of the first dam bag 200 and the second dam bag 300; and

a charge and discharge pipe 410, wherein the charge and discharge pipe 410 is disposed in the concrete bottom plate 110, and the charge and discharge pipe 410 is communicated with the first cavity 210 through a plurality of auxiliary pipes 420. Here the auxiliary tube 420 may be a water cap.

In addition, both ends of the first dam bag 200 of the present embodiment are hermetically connected to the concrete side plates 120, respectively, and may be implemented by anchoring. Thereby ensuring that both ends of the first dam bag 200 are respectively and hermetically connected with the concrete side plates 120.

In addition, for convenience of description of the present embodiment, the rubber dam apparatus in the present embodiment may also be simply referred to as a rubber dam, and will not be explained in the following of the present embodiment.

Of course, the two ends of the second dam bag 300 and the concrete side plate 120 may be connected in a sealing manner by anchoring.

The pipe 410 can be filled with gas or liquid, especially can be directly filled with water in the river, thereby obtaining local materials and saving cost. And the pipe 410 can be connected with a water pump in a water pump room, so that the pipe 410 is filled with water.

When the rubber dam needs to be lifted up, gas or liquid is filled into the first cavity 210 through the filling and discharging pipe 410 and the auxiliary pipe 420, so that the first dam bag 200 is expanded and inflated, because the highest point of the second cavity 310 is higher than that of the first cavity 210, and a connecting hole for communicating the first cavity 210 with the second cavity 310 is arranged at the joint of the first dam bag 200 and the second dam bag 300, the second dam bag 300 is lifted up, so that the water flow in a river channel is intercepted, and the water in the river channel flows from the second dam bag 300 to the first dam bag 200, so that the second dam bag 300 is located at the upstream; therefore, the height of the upstream water is lower than the top surface of the second dam bag 300 by adjusting the heights of the first dam bag 200 and the second dam bag 300, so that the upstream water cannot overflow from the top surface of the second dam bag 300, and the second dam bag 300 is positioned on one side of the first dam bag 200 and attached to the first dam bag 200, so that the front side of the second dam bag 300 protrudes forwards in the direction perpendicular to the river channel, and the appearance of the whole rubber dam is beautified.

Moreover, the bottom of the first dam bag 200 in this embodiment is directly and hermetically connected to the bottom of the concrete bottom plate 110, and only one pipe 410 for charging and discharging is disposed at the bottom of the first cavity 210, the pipe 410 for charging and discharging gas or liquid into and from the first cavity 210 through a plurality of auxiliary pipes 420, and then the pipe for charging and discharging gas or liquid is conveyed to the second cavity 310 through a plurality of connecting holes, so that smooth charging and discharging of gas or liquid in the first cavity 210 and the second cavity 310 is realized, and the pipe arrangement is realized only through the pipe 410 for charging and discharging, the auxiliary pipe 420 and the connecting holes, so that the complexity of the arrangement of the pipe in the rubber dam is reduced, and the manufacturing and construction period and cost of the rubber dam are reduced.

Referring to fig. 2, preferably, on a cross section perpendicular to the longitudinal direction of the first dam bag 200 and the second dam bag 300, the projected area of the first cavity 210 is larger than the projected area of the second cavity 310, and the second dam bag 300 is disposed on the first dam bag 200.

The section perpendicular to the longitudinal direction of the first dam bag 200 and the second dam bag 300 is a section formed by cutting the rubber dam apparatus along the water flow direction.

By the arrangement, the proportion of the whole rubber dam can be coordinated, and if the volume of the second dam bag 300 is larger than that of the first dam bag 200, overlarge pressure is generated on the first dam bag 200, so that the first dam bag 200 is easily damaged, and the appearance attractiveness of the first dam bag 200 and the second dam bag 300 is also influenced.

Through the arrangement, the projection area of the first cavity 210 is larger than the projection area of the second cavity 310, and the second dam bag 300 is arranged on the first dam bag 200, so that the longitudinal volumes of the first dam bag 200 and the second dam bag 300 are fully reduced, the volume of the whole rubber dam equipment is fully reduced, and the occupied river channel space is reduced.

Not shown in the drawings, it is preferable that a plurality of the connection holes are arranged in a plurality of rows, and the plurality of the connection holes of each row are arranged along the longitudinal direction of the first dam bag 200.

So configured, it is ensured that the liquid or gas can smoothly, uniformly and rapidly enter the second cavity 310.

Referring to fig. 2, preferably, the joint of the first dam bag 200 and the second dam bag 300 is an integral structure.

So set up for when fixed whole rubber dam equipment, only need with the bottom of first dam bag 200 fixed can, thereby further make things convenient for the rubber dam installation fixed. Moreover, the joint of the first dam bag 200 and the second dam bag 300 is of an integrated structure, so that unnecessary sealing connection can be reduced, and the problem of leakage at the sealing connection position is avoided.

Referring to fig. 2 and 3, preferably, the rubber dam apparatus of the present embodiment further includes a sealing coupling assembly by which the first dam bag 200 and the second dam bag 300 are coupled to the concrete bottom plate 110.

Referring to fig. 2 and 3, preferably, the sealing connection assembly includes a threaded connector 112, a pressure plate 113, and a nut 114; a trough body 111 is formed in the top surface of the concrete bottom plate 110, a mounting hole is formed in the bottom wall of the trough body 111, and the trough body 111 extends along the longitudinal direction of the first dam bag 200; the ends of the cross sections of the first dam bag 200 and the second dam bag 300 are arranged in the groove body 111, the bottom end of the threaded connector 112 is fixed in the mounting hole, and the top end of the threaded connector 112 is suitable for extending out of the mounting hole, sequentially penetrates through the ends and the pressing plate 113, and is connected with the nut 114.

The hold-down plates here are rectangular and extend in the longitudinal direction of the river.

Moreover, the two ends of the cross section of the first dam bag 200 are pressed by the rectangular pressing plate 113, and then the pressing plate 113 is pressed and fixed by the plurality of nuts 114, thereby ensuring that the bottom of the first dam bag 200 and the concrete bottom plate 110 are sufficiently sealed. In addition, the threaded connector 112 is arranged in the groove body 111, so that the overall height of the pressing plate 113 and other parts can be reduced, and the pressing plate is prevented from protruding out of the top surface of the concrete bottom plate 110 to influence the river channel.

So set up, make things convenient for first dam bag 200 and concrete bottom plate 110 to be fixed to improve fixed efficiency, and also can ensure sealed effect.

Referring to fig. 3, the threaded connection 112 is preferably L-shaped. The screw thread 112 is firmly fixed with the concrete bottom plate 110.

The sealing connection assembly further includes: a lower backing plate 115, a bottom gasket 116, a water stop sheet 117 and a reinforcing sheet 118,

the pressing plate 113 is an upper pressing plate,

the top of the lower backing plate 115 is provided with two parallel ribs 1151, the plurality of threaded connectors 112 are sequentially arranged between the two ribs 1151, the lower backing plate 115 is arranged in the groove body 111,

the bottom gasket 116, the water stop sheet 117, the end parts of the cross sections of the first dam bag 200 and the second dam bag 300 in the length direction, the reinforcing sheet 118 and the pressing plate 113 are sequentially stacked from bottom to top, the nut 114 is pressed on the pressing plate 113,

the bottom surface of the pressing plate 113 is provided with two strip-shaped grooves 1131 which are arranged in parallel, and the strip-shaped grooves 1131 are arranged in one-to-one correspondence with the convex ribs 1151. So that the gasket 116, the water stop sheet 117, the end portions of the longitudinal cross sections of the first dam bag 200 and the second dam bag 300, and the reinforcing sheet 118 are deformed accordingly. Thereby ensuring the sealing effect.

Not shown in the drawings, preferably, two ends of the cross section of the second dam bag 300 are hermetically connected with the concrete bottom plate 110 at the same groove body 111.

Thereby reducing unnecessary redundant sealing connections and thus improving the assembly efficiency of the rubber dam apparatus while also reducing the possibility of unnecessary leakage of the rubber dam.

Referring to fig. 1 and 2, preferably, the apparatus further comprises two leveling devices, wherein the two leveling devices are respectively installed at the top of the second dam bag 300 and are respectively close to the corresponding concrete side plates 120, the leveling devices comprise a liquid level sensor 510 and a driving pump 520, and the liquid level sensor 510 is installed at the top of the second dam bag 300 and extends downwards along the side of the second dam bag 300 away from the first dam bag 200. The two liquid level sensors 510 are installed at the same height, the driving pump 520 is communicated with the second cavity 310, and the driving pump 520 is used for driving and discharging gas or liquid in the second cavity 310 when the height difference of the water levels detected by the two liquid level sensors 510 reaches a set value.

In this embodiment, the level state of the water upstream of the second dam bag 300 under a standard atmospheric pressure is used as a reference standard, and the level sensors 510 at the two ends of the second dam bag 300 are used to detect whether the top of the second dam bag 300 is level. When the difference between the water levels detected by the two liquid level sensors 510 reaches a set value, the driving pump 520 is used to drive the gas or liquid in the second cavity 310 to be discharged, so as to ensure that the difference between the water levels detected by the two liquid level sensors 510 is kept within a set range, and thus, the levelness of the top of the second dam bag 300 is ensured.

Specifically, the two liquid level sensors 510 may be respectively connected to a controller, so that the water level heights detected by the two liquid level sensors 510 are respectively sent to the controller, the controller may be connected to a display device and a control platform, and the display device (display) and the control platform are controlled by corresponding maintenance personnel, so that the control platform is used to control the controller, and then the controller is respectively connected to the two driving pumps 520, so that when the difference between the water level heights detected by the two liquid level sensors 510 reaches or exceeds a set value, the driving pump 520 at the higher end of the second dam bag 300 is operated to discharge the water in the second cavity 310 until the water level heights detected by the two liquid level sensors 510 are consistent, so that the controller stops the corresponding driving pump 520 from discharging the water.

Not shown in the drawings, preferably, the rubber dam device further comprises a display and a control platform, wherein the display is connected with the controller and is used for displaying the detection results of the two liquid level sensors 510.

Referring to fig. 1, preferably, the rubber dam apparatus further includes an overpressure overflow pipe 600, the overpressure overflow pipe 600 having a U-shape with a bent portion fixed in one of the concrete side plates 120, a bottom end of the overpressure overflow pipe 600 being connected to the first cavity 210, and a top end of the overpressure overflow pipe 600 being placed above the second dam bag 300.

When the pressure of the liquid or gas filled in the first dam bag 200 exceeds the safety pressure, the liquid or gas is discharged from the top of the overpressure overflow pipe 600, and in the case that the pressure in the first dam bag 200 does not exceed the safety pressure, the overpressure overflow pipe 600 has a U-shape, and a bent part of the overpressure overflow pipe 600 is fixed in one of the concrete side plates 120, so that the liquid or gas in the first dam bag 200 is prevented from easily flowing out through the overpressure overflow pipe 600 due to the characteristics of the U-shape structure, and the top of the overpressure overflow pipe 600 is disposed above the second dam bag 300, so that the liquid or gas in the first dam bag 200 does not flow out from the top of the overpressure overflow pipe 600 due to the atmospheric pressure, thereby ensuring the normal use of the first dam bag 200. The safety of the entire rubber dam installation is thus ensured by the overpressure overflow pipe 600.

In addition, a pressure measuring pipe 130 may be further installed in the concrete bottom plate 110, a pressure sensor may be installed in the pressure measuring pipe 130, the pressure measuring pipe 130 may be communicated with the first cavity, and whether the pressure of the liquid or gas in the first cavity is within a set range may be detected by the pressure sensor in the pressure measuring pipe 130.

In addition, the front end and the rear end of the concrete bottom plate 110 can be respectively provided with the impervious walls 140, the impervious walls 140 are erected on the riverbed below the river channel, and then the concrete bottom plate 110 is arranged on the two impervious walls 140, so that the firmness of the concrete bottom plate 110 is improved through the two impervious walls 140, and the safety of the whole rubber dam equipment is ensured.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.

Claims (10)

1. Rubber dam apparatus adapted to be arranged in a concrete waterway comprising a concrete bottom plate (110) and two concrete side plates (120), the two concrete side plates (120) being erected on both sides of the concrete bottom plate (110), characterized by comprising:

the longitudinal two ends of the first dam bag (200) are respectively connected with the two concrete side plates (120) in a sealing mode, the two ends of the cross section of the first dam bag (200) are respectively connected with the concrete bottom plate (110) in a sealing mode, and the first dam bag (200), the concrete bottom plate (110) and the concrete side plates (120) are encircled to form a first cavity (210);

the second dam bag (300) is located on one side of the first dam bag (200) and attached to the first dam bag (200), two longitudinal ends of the second dam bag (300) are respectively in sealing connection with the two concrete side plates (120), two ends of the cross section of the second dam bag (300) are respectively in sealing connection with the concrete bottom plate (110), the second dam bag (300), the concrete bottom plate (110) and the concrete side plates (120) are enclosed to form a second cavity (310), the highest point of the second cavity (310) is higher than that of the first cavity (210), and a dam connecting hole for communicating the first cavity (210) with the second cavity (310) is formed in the attachment position of the first dam bag (200) and the second dam bag (300); and

a charge and discharge pipe (410), the charge and discharge pipe (410) is arranged in the concrete bottom plate (110), and the charge and discharge pipe (410) is communicated with the first cavity (210) through a plurality of auxiliary pipes (420).

2. Rubber dam apparatus according to claim 1, characterized in that in a cross section perpendicular to the longitudinal direction of said first dam pocket (200) and said second dam pocket (300), the projected area of said first cavity (210) is larger than the projected area of said second cavity (310), said second dam pocket (300) being arranged on said first dam pocket (200).

3. Rubber dam apparatus according to claim 1, characterized in that a plurality of said attachment holes are arranged in a plurality of rows, the plurality of attachment holes of each row being arranged along the longitudinal direction of said first dam bag (200).

4. Rubber dam apparatus according to claim 1, characterized in that the joint of said first dam bag (200) and said second dam bag (300) is of one-piece construction.

5. Rubber dam apparatus according to claim 1, further comprising a sealing connection assembly by which said first dam bag (200) and said second dam bag (300) are connected with said concrete bottom plate (110).

6. Rubber dam apparatus according to claim 5, characterized in that said sealing connection assembly comprises a threaded connection (112), a pressure plate (113) and a nut (114); a groove body (111) is formed in the top surface of the concrete bottom plate (110), a mounting hole is formed in the bottom wall of the groove body (111), and the groove body (111) extends along the longitudinal direction of the first dam bag (200); the end parts of the length direction cross sections of the first dam bag (200) and the second dam bag (300) are arranged in the groove body (111), the bottom end of the threaded connecting piece (112) is fixed in the mounting hole, the top end of the threaded connecting piece (112) is suitable for extending out of the mounting hole and sequentially penetrates through the end parts of the length direction cross sections of the first dam bag (200) and the second dam bag (300) and the pressing plate (113) and is connected with the nut (114).

7. Rubber dam apparatus according to claim 6, characterized in that said threaded connection (112) is L-shaped; the sealing connection assembly further includes: a lower backing plate (115), a bottom gasket (116), a water stop sheet (117) and a reinforcing sheet (118),

the top of the lower backing plate (115) is provided with two parallel ribs (1151), a plurality of threaded connectors (112) are sequentially arranged between the two ribs (1151), the lower backing plate (115) is arranged in the groove body (111),

the bottom gasket (116), the water stop sheet (117), the end parts of the cross sections of the first dam bag (200) and the second dam bag (300) in the length direction, the reinforcing sheet (118) and the pressing plate (113) are sequentially stacked from bottom to top, the nut (114) is pressed on the pressing plate (113),

the bottom surface of clamp plate (113) is provided with two rectangular shape grooves (1131) of parallel arrangement, rectangular shape groove (1131) with bead (1151) one-to-one sets up.

8. Rubber dam apparatus according to claim 7, characterized in that both ends of the cross section of said second dam bag (300) are sealingly connected to said concrete bottom plate (110) in the same tank (111).

9. Rubber dam apparatus according to any of claims 1 to 8, further comprising two levelling devices mounted respectively on top of said second dam bag (300) and respectively adjacent to said concrete side panels (120), the leveling device comprises a liquid level sensor (510) and a driving pump (520), the liquid level sensor (510) is installed at the top of the second dam bag (300) and extends downwards along the side, away from the first dam bag (200), of the second dam bag (300), the installation heights of the two liquid level sensors (510) are the same, the driving pump (520) is communicated with the second cavity (310), the driving pump (520) is used for driving and discharging gas or liquid in the second cavity (310) when the height difference of the water level detected by the two liquid level sensors (510) reaches a set value.

10. Rubber dam apparatus according to any of claims 1 to 8, further comprising an overpressure overflow pipe (600), said overpressure overflow pipe (600) being U-shaped and fixed with said concrete side plate (120), a bottom end of said overpressure overflow pipe (600) communicating with said first cavity (210), a top end of said overpressure overflow pipe (600) being placed above said second dam bag (300).

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