Arrangement type of sand blocking well at inlet of flood discharge cavity

Abstract

The utility model discloses a flood discharge emptying cavity inlet sand blocking well arrangement form which comprises a flood discharge emptying cavity, a sand blocking well is arranged on one side of the flood discharge emptying cavity, the sand blocking well is communicated with the flood discharge emptying cavity through a connecting section, a square hole opening is formed in the side, opposite to the connecting section, of the sand blocking well, side piers are arranged on the two sides of the square hole opening, and the side piers are connected with the sand blocking well through a connecting section. An openable concrete stoplog door is arranged between the side piers, the concrete stoplog door is in plugging fit with the square hole after being closed, a sand blocking well is arranged at an inlet of the flood discharge and emptying cavity, the square hole is formed in the upstream side wall of the sand blocking well, the square hole and a connecting section are arranged on the downstream side wall of the sand blocking well, and the sand blocking well is communicated with the flood discharge and emptying cavity; side piers are arranged on the upstream portions of the two sides of a hole opening of the upstream side wall of the sand blocking well, stop log door grooves are formed in the side piers, and the concrete stop log door is placed in the stop log door grooves, so that the upstream side wall of the sand blocking well can be blocked, and the sand blocking well in the operation period is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to an arrangement type of a sand-trapping well at the inlet of a flood discharge and emptying hole. Background Art

[0002] In order to save investment, the reservoirs of general water conservancy and hydropower projects combine the discharge hole during operation and the diversion hole during construction. Because the elevation of the diversion hole inlet is close to the elevation of the river bottom, the elevation is relatively low. After the reservoir is filled with water, the silt in the rainwater collection area of ​​the reservoir will be deposited in the reservoir, and the silt deposition elevation at the diversion hole inlet will be higher than the elevation of the inlet bottom plate. In order to prevent the silt from clogging the discharge hole inlet during operation, the "dragon head-raising" layout is generally adopted. The discharge hole inlet is arranged above the diversion hole inlet, and connected to the diversion hole body through a vertical shaft or an inclined shaft to form a water discharge channel, making full use of the excavated cavern of the diversion hole as part of the discharge hole during operation, so as to save project investment and construction period. In order to make the water flow smooth, it is also necessary to set a turning section at the bottom of the vertical shaft or the inclined shaft to connect with the diversion hole body, resulting in a shorter vertical shaft or inclined shaft and a cramped space for the arrangement of the vertical shaft or the inclined shaft and the turning section. The construction of vertical or inclined shafts is difficult, and the "dragon raising its head" layout requires large project investment and a long construction period. Utility Model Content

[0003] The utility model provides a layout type of a sand trap at the inlet of a flood discharge and emptying hole, aiming to solve the problems of large investment and long construction period in the above-mentioned vertical shaft setting project.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A type of arrangement of a sand-trapping well at the inlet of a flood discharge and emptying hole comprises a flood discharge and emptying hole, a sand-trapping well is arranged on one side of the flood discharge and emptying hole, the sand-trapping well is connected with the flood discharge and emptying hole through a connecting section, a square opening is arranged on the side of the sand-trapping well opposite to the connecting section, side piers are arranged on both sides of the square opening, an openable and closable concrete stacked beam door is arranged between the side piers, and the concrete stacked beam door forms a sealing cooperation with the square opening after closing.

[0006] Preferably, a square discharge port is provided on the downstream side wall of the sand-trapping well, the discharge port is sealed and connected with the feed port of the connecting section, and the discharge port of the connecting section is connected with the flood discharge and evacuation hole.

[0007] As a more preferred embodiment, the bottom elevation of the square discharge port of the sand-trapping well is consistent with the bottom elevation of the square opening.

[0008] Preferably, the feed port of the connecting section is larger than the discharge port, and the diameter of the connecting section gradually decreases from the feed port to the discharge port.

[0009] Preferably, the side piers are arranged relative to each other, and are symmetrical about the square opening.

[0010] As a more preferred embodiment, the side pier is provided with a stacked beam door groove on one side relative to the side near the square opening, and the stacked beam door grooves on both sides cooperate to form a complete stacked beam door groove, and the concrete stacked beam door is embedded in the complete stacked beam door groove.

[0011] Preferably, the bottom elevation of the square opening is consistent with the floor elevation at the junction of the flood discharge and emptying hole and the connecting section.

[0012] Beneficial effects of the utility model:

[0013] The utility model uses the flood discharge and emptying hole as a diversion hole, and arranges a sand trap well and a corresponding stacked beam door sealing mechanism, which can be switched between the diversion period and the operation period. During the diversion period, the stacked beam door is opened to divert the water, and during the operation period, the stacked beam door is lowered to trap sand. The process is convenient to switch, and the arrangement type is easy to construct, saves investment, and has a short construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0016] In the figure: 1. Flood discharge and emptying hole; 2. Sand well; 3. Square opening; 4. Connecting section; 5. Side pier; 6. Stacked beam gate slot; 7. Concrete stacked beam gate. DETAILED DESCRIPTION

[0017] As follows, embodiments are further described with reference to the accompanying drawings.

[0018] like Figure 1~Figure 2 As shown, as a preferred embodiment 1, a sand-trapping well arrangement type at the inlet of a flood discharge and emptying hole comprises a flood discharge and emptying hole 1, a sand-trapping well 2 is arranged on one side of the flood discharge and emptying hole 1, the sand-trapping well 2 is connected with the flood discharge and emptying hole 1 through a connecting section 4, a square opening 3 is arranged on the side opposite to the connecting section 4 of the sand-trapping well 2, side piers 5 are arranged on both sides of the square opening 3, an openable and closable concrete stacked beam door 7 is arranged between the side piers 5, and the concrete stacked beam door 7 forms a sealing cooperation with the square opening 3 after closing.

[0019] Embodiment 1 provides a layout type of sand trap well at the inlet of a flood discharge and emptying hole. A square opening 3 is arranged on the upstream side wall of the sand trap well 2 so that water flows from the reservoir into the sand trap well 2 during the diversion period. A square opening and a connecting section 4 are arranged on the downstream side wall of the sand trap well 2, which are connected to the inlet of the flood discharge and emptying hole 1 so that water flows from the sand trap well 2 into the flood discharge and emptying hole 1. At this time, the flood discharge and emptying hole 1 is used as a diversion hole.

[0020] In order to facilitate the entry of silt upstream of the sand-trapping well 2 in the reservoir during the water storage operation period into the sand-trapping well 2, side piers 5 are arranged upstream of the openings of the upstream side walls of the sand-trapping well 2 on both sides, and the side piers 5 are provided with stacked beam gate grooves 6. After the reservoir is filled with water, the concrete stacked beam gate 7 is placed in the stacked beam gate grooves 6 to complete the sealing of the upstream side walls of the sand-trapping well 2. The water flows vertically into the sand-trapping well 2 from the top of the sand-trapping well 2, and then enters the flood discharge and emptying hole 1.

[0021] As a preferred embodiment 2, a square discharge port is arranged on the downstream side wall of the sand-trapping well 2, and the discharge port is sealed and connected with the feed port of the connecting section 4, and the discharge port of the connecting section 4 is connected with the flood discharge and hollowing hole 1 to facilitate diversion.

[0022] As a preferred embodiment 3, the bottom elevation of the square discharge port of the sand-trapping well 2 is consistent with the bottom elevation of the square opening 3, which is convenient for diversion.

[0023] As a preferred embodiment 4, the feed port of the connecting section 4 is larger than the discharge port, and the diameter of the connecting section 4 gradually decreases from the feed port to the discharge port. The diameter of the connecting section 4 gradually decreases, which has a certain acceleration effect on the diversion water and accelerates the diversion process.

[0024] As a preferred embodiment 5, the side piers 5 are arranged relatively to each other, and the side piers 5 are symmetrical about the square opening 3, so as to ensure the stability of the arrangement of the concrete stoplog door 7.

[0025] As a preferred embodiment 6, the side pier 5 is provided with a stacked beam gate slot 6 on the opposite side near the square opening 3, and the stacked beam gate slots 6 on both sides cooperate to form a complete stacked beam gate slot 6. The concrete stacked beam door 7 is embedded in the complete stacked beam gate slot 6, which is convenient for arranging the concrete stacked beam door 7, opening and closing, and thus facilitating switching between the diversion period and the sand retaining period.

[0026] As a preferred embodiment 7, the bottom elevation of the square opening 3 is consistent with the floor elevation at the connection point between the flood discharge and emptying hole 1 and the connecting section 4, which is convenient for diversion.

[0027] As a preferred embodiment 8, the height of the sand-trapping well 2 is determined according to the elevation of the bottom plate of the diversion tunnel, the dead water level of the reservoir and the silt accumulation elevation at the inlet of the diversion tunnel, and the size of the vertical well is determined according to the discharge flow of the flood discharge and emptying tunnel 1 during operation.

[0028] As a preferred embodiment 9, a rectangular or rectangular square opening 3 is set at the bottom of the upstream side wall of the sand-trapping well 2 for water flow to enter the sand-trapping well 2 during the construction diversion period. The size of the opening is determined according to the flow rate during the diversion period.

[0029] As a preferred embodiment 10, a rectangular or rectangular opening and a connecting section 4 are provided at the bottom of the downstream side wall of the sand-trapping well 2, which are used for water to flow from the sand-trapping well 2 into the diversion tunnel during the construction period. The size of the opening is determined according to the flow rate during the diversion period and the discharge flow rate of the discharge tunnel during the operation period.

[0030] The working principle of this utility model:

[0031] The utility model provides a layout type of sand-blocking well at the inlet of a flood discharge and emptying hole. A square hole 3 is arranged on the upstream side wall of the sand-blocking well 2 so that water flows from the reservoir into the sand-blocking well 2 during the diversion period. A square hole and a connecting section 4 are arranged on the downstream side wall of the sand-blocking well 2, which are connected with the inlet of the flood discharge and emptying hole 1 so that water flows from the sand-blocking well 2 into the flood discharge and emptying hole 1. At this time, the flood discharge and emptying hole 1 is used as a diversion hole.

[0032] In order to facilitate the entry of silt upstream of the sand-trapping well 2 in the reservoir during the water storage operation period into the sand-trapping well 2, side piers 5 are arranged upstream of the openings of the upstream side walls of the sand-trapping well 2 on both sides, and the side piers 5 are provided with stacked beam gate grooves 6. After the reservoir is filled with water, the concrete stacked beam gate 7 is placed in the stacked beam gate grooves 6 to complete the sealing of the upstream side walls of the sand-trapping well 2. The water flows vertically into the sand-trapping well 2 from the top of the sand-trapping well 2, and then enters the flood discharge and emptying hole 1.

Claims

1. A flood discharge and emptying hole inlet sand trap arrangement type, comprising a flood discharge and emptying hole (1), characterized in that: A sand trap (2) is provided on one side of the flood discharge and emptying hole (1), and the sand trap (2) is connected to the flood discharge and emptying hole (1) through a connecting section (4). A square opening (3) is provided on the side of the sand trap (2) opposite to the connecting section (4), and side piers (5) are provided on both sides of the square opening (3). Openable and closable concrete stacked beam doors (7) are provided between the side piers (5), and the concrete stacked beam doors (7) are sealed with the square opening (3) when closed.

2. The arrangement type of the sand-blocking well at the inlet of the flood discharge and emptying hole according to claim 1 is characterized in that: A square discharge port is provided on the downstream side wall of the sand trap (2), the discharge port is sealedly connected to the feed port of the connecting section (4), and the discharge port of the connecting section (4) is connected to the flood discharge and emptying hole (1).

3. The arrangement type of the sand-blocking well at the entrance of the flood discharge and emptying hole according to claim 2 is characterized in that: The bottom elevation of the square discharge port of the sand trap (2) is consistent with the bottom elevation of the square opening (3).

4. The arrangement type of the sand-blocking well at the entrance of the flood discharge and emptying hole according to claim 1 is characterized in that: The size of the feed opening of the connecting section (4) is larger than the discharge opening, and the diameter of the connecting section (4) gradually decreases from the feed opening to the discharge opening.

5. The arrangement type of the sand-blocking well at the entrance of the flood discharge and emptying hole according to claim 1 is characterized in that: The side piers (5) are arranged relative to each other, and the side piers (5) are symmetrical with respect to the square opening (3).

6. The arrangement type of the sand-blocking well at the entrance of the flood discharge and emptying hole according to claim 5 is characterized in that: The side pier (5) is provided with a stopper gate slot (6) at a position close to the square opening (3) on the opposite side, and the stopper gate slots (6) on both sides cooperate to form a complete stopper gate slot (6), and the concrete stopper gate (7) is embedded in the complete stopper gate slot (6).

7. The arrangement type of sand-blocking well at the entrance of flood discharge and emptying hole according to claim 1 is characterized in that: The bottom elevation of the square opening (3) is consistent with the floor elevation at the connection point between the flood discharge and emptying hole (1) and the connecting section (4).

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