Device for first-stage direct-burial construction of inclined gate trench of hydropower station arch dam and construction method thereof

Abstract

This invention provides a device and construction method for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams. The device includes a ladder with several operating platforms and ladders connecting the platforms. The lower end of the ladder is set on a sill, and a pre-embedded support is provided on one side of the ladder. The upper end of the ladder is connected to the pre-embedded support via connectors. A main rail slide installation reference seat, a gate lintel installation reference seat, and a water seal plate installation reference seat are provided on one side of the ladder. During construction, the main rail slide installation reference seat, the gate lintel installation reference seat, and the water seal plate installation reference seat provide installation reference surfaces for the main rail, the gate lintel, and the main rail water seal plate, respectively. This device and method have fewer construction steps, and the installation of the gate slot embedded parts does not occupy the straight-line construction period of the dam concrete pouring, which can greatly accelerate the installation progress. During construction, the entire water sealing section of the gate slot embedded parts is laid out in one go, which can effectively avoid the cumulative error caused by multiple measurements and layouts of the water sealing section.

Description

Technical Field

[0001] This invention relates to the field of inclined gate slot construction for hydropower station arch dams, and particularly to a device and construction method for the first-phase direct burial construction of inclined gate slots for hydropower station arch dams. Background Technology

[0002] The embedded parts of the inclined gate slot of the arch dam of the hydropower station include the bottom sill, main rail, reverse rail, lintel, main rail water seal seat plate, etc. The installation quality of the embedded parts of the gate slot directly affects the water-stopping effect of the gate. The existing direct burial construction device for the gate slot embedded parts in the first phase is a cloud-shaped trolley, which is welded from steel profiles. In the first phase of direct burial construction of the gate slot, the cloud-shaped trolley mainly provides a safe and stable working platform for the construction process. The gate slot embedded parts are connected and fixed to the pre-embedded steel profiles outside the gate using the cloud-shaped trolley. Its disadvantages are: due to the mismatch between the height of the cloud-shaped trolley and the height of the gate slot, and its own fixing measures are not perfect, the gate slot embedded parts in the sealing section below the lintel cannot be measured and laid out in one go. Multiple measurements and layouts are prone to cumulative errors, which will affect the water-stopping effect of the gate. The cloud-shaped trolley does not set a reference surface for measuring and laying out the gate slot embedded parts. The position of the embedded parts is mainly detected by pulling parallel lines multiple times. There are cumulative errors in the layout process, and there are also human errors in the reading process. The cloud-shaped trolley does not set up a test trench unit. After the gate slot embedded parts are installed, they need to be tested using a pre-customized test trench frame, which increases the construction cost and construction period to a certain extent. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a device and construction method for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams, which can ensure the installation quality of gate slot embedded parts and accelerate the construction progress.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a device for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams, including a ladder. The ladder is set according to the inclination angle of the installed gate slot. Several sets of operating platforms are provided on the ladder, and ladders are provided between each operating platform. The lower end of the ladder is set on the bottom sill. A pre-embedded support is provided on one side of the ladder. The upper end of the ladder is connected to the pre-embedded support through a connector. A main rail slide installation reference seat, a gate lintel installation reference seat, and a water seal plate installation reference seat are provided on one side of the ladder. During construction, the main rail slide installation reference seat, the gate lintel installation reference seat, and the water seal plate installation reference seat provide installation reference surfaces for the main rail, the gate lintel, and the main rail water seal plate, respectively.

[0005] In a preferred embodiment, the bottom sill is provided with a stop block to limit the lower end of the ladder.

[0006] In a preferred embodiment, the ladder is provided with a plurality of top support mechanisms for adjusting the position of the anti-rails on one side. The top support mechanism includes a mounting base provided on the ladder, a threaded hole provided on the mounting base for engaging with the top support screw, and a top support plate provided at the end of the top support screw.

[0007] In a preferred embodiment, a main rail fixing mechanism is provided between the pre-embedded support column and the main rail slide mounting reference seat. The main rail fixing mechanism includes a support seat connected to the pre-embedded support column, and an adjusting screw connected to the main rail is provided on the support seat. The adjusting screw passes through the mounting hole on the main rail and is then tightened by a nut.

[0008] In a preferred embodiment, the ladder is symmetrically equipped with forward sliders, reverse sliders, and lateral sliders at three positions: left and right, top and middle, and bottom. The forward sliders are set to correspond to the main rail, and the reverse sliders and lateral sliders are set to correspond to the reverse rail.

[0009] In a preferred embodiment, the ladder is provided with climbing rails on both sides, and the climbing rails are provided with several limiting holes. Several positioning claws are installed in the door slots. The positioning claws cooperate with the climbing rails. Positioning plates are inserted into the limiting holes and are located on the lower side of the positioning claws.

[0010] In a preferred embodiment, the ladder climbs using a self-climbing mechanism, which includes a climbing cylinder, a track ear plate on the outer side of the climbing track, a support ear plate on the upper side of the positioning claw, and connecting ear plates at both the lower and telescopic ends of the climbing cylinder. The connecting ear plate at the telescopic end of the climbing cylinder is connected to the track ear plate by a pin, and the connecting ear plate at the lower end of the climbing cylinder is connected to the support ear plate by a pin.

[0011] The present invention also provides a construction method for a direct-buried construction device for the first phase of the inclined gate slot of a hydropower station arch dam, comprising the following steps:

[0012] Step 1: Pre-embed the support columns and pre-embed the brackets for the sill, and then pour the sill.

[0013] Step 2: After the bottom sill is poured to the required strength, the ladder is hoisted. After the ladder is positioned, the upper end is connected to the pre-embedded support through connectors. Stop blocks are welded on the bottom sill to limit the lower end of the ladder.

[0014] Step 3: Install the main rail and reverse rail below the lintel height. The main rail and reverse rail are installed in sections. The main rail is installed with the reference seat tightly against the main rail slide. The main rail water seal seat plate is also installed with the reference seat tightly against the water seal seat plate. The main rail is connected to the pre-embedded support through the main rail fixing mechanism. The lower end of the reverse rail is welded and fixed to the bottom sill. The top non-working surface is welded and fixed to the ladder through the steel section. The installation height of the main rail and reverse rail matches the height of this concrete pouring. After the installation of the main rail and reverse rail is accepted, the concrete pouring operation is carried out. The installation of other sections of the main rail and reverse rail is carried out in the same way until it is installed to the lintel position. The lintel is installed with the reference seat tightly against the lintel and welded and fixed to the water seal seat plates of the main rail at both ends.

[0015] Step 4: Install the main rail and reverse rail above the lintel height, remove the connecting parts between the ladder and the pre-embedded support column and other connecting mechanisms, lift the ladder, fix the ladder after lifting, and then install and pour the main rail and reverse rail above the lintel height.

[0016] In the preferred embodiment, in step four, positioning cones are pre-embedded on both sides of the door slot, positioning claws are installed on the positioning cones, and the climbing cylinder is hinged and fixed between the positioning claws and the climbing track. By extending the climbing cylinder, the ladder is lifted upward. After the climbing cylinder extends to its maximum stroke, the positioning plate is inserted into the limiting hole to limit the ladder in the up and down directions. Then, the connecting pin between the climbing cylinder and the ear plate is removed, the climbing cylinder retracts, and connects with the track ear plate on the climbing track. This process is repeated until the ladder is lifted to the designated position.

[0017] In the preferred embodiment, before the ladder is lifted, forward sliders, reverse sliders, and lateral sliders are installed on the ladder. During the lifting process, the forward sliders, reverse sliders, and lateral sliders move along the cast-in-place door groove to complete the test groove.

[0018] This invention provides a device and construction method for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams, which has the following beneficial effects:

[0019] 1. During the construction of this device and method, the entire water-sealing section of the gate slot embedded part is laid out in one go, which can effectively avoid the cumulative error caused by multiple measurements and layouts;

[0020] 2. This device and method have fewer construction steps, which can speed up the installation progress of the door slot embedded parts;

[0021] 3. The device and method have reliable fixing measures for the door slot embedded parts during construction, which can effectively prevent the door slot embedded parts from shifting during concrete pouring.

[0022] 4. The main rail slide mounting base, lintel mounting base, and water seal plate mounting base set on the ladder can achieve precise positioning and rapid installation of the door slot track, effectively avoiding the cumulative error caused by manual reading. At the same time, the mounting base surface of the ladder also makes the fixing of the door slot embedded parts more reliable.

[0023] 5. By setting forward sliders, reverse sliders, and lateral sliders, the test trenching work of the door groove embedded parts of the already poured parts can be completed during the lifting process of the ladder, which can effectively save construction time and construction costs.

[0024] 6. By setting up a self-climbing mechanism, the ladder can climb itself, ensuring construction safety and improving work efficiency; Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0029] Figure 4 A schematic diagram of the installation structure of the door groove embedded part;

[0030] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0031] Figure 6 for Figure 4 Enlarged view at point D;

[0032] Figure 7 This is a diagram showing the location of the lintel;

[0033] Figure 8 A structural schematic diagram of the main rail and the main rail water seal seat plate;

[0034] Figure 9 This is a front view of the door slot embedded part during installation.

[0035] Figure 10 for Figure 9 Enlarged view at point E in the middle;

[0036] Figure 11 This is a schematic diagram of the preferred structure of the cloud ladder;

[0037] Figure 12 for Figure 11 Enlarged view at point F;

[0038] Figure 13 This is a schematic diagram of the installation of the climbing cylinder;

[0039] In the diagram: 1. Bottom sill; 2. Main rail; 3. Door lintel; 4. Main rail water seal seat plate; 5. Reverse rail; 6. Ladder; 7. Operating platform; 8. Embedded support column; 9. Connector; 10. Main rail slide mounting base; 11. Door lintel mounting base; 12. Water seal seat plate mounting base; 13. Stop block; 14. Mounting seat; 15. Top support screw; 16. Top support plate; 17. Support seat; 18. Adjusting screw; 19. Nut; 20. Forward slider; 21. Reverse slider; 22. Lateral slider; 23. Climbing rail; 24. Positioning claw; 25. Positioning plate; 26. Climbing cylinder; 27. Rail ear plate; 28. Support ear plate; 29. ​​Connecting ear plate; 2301. Limiting hole. Detailed Implementation

[0040] like Figures 1-8 As shown, a device for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams includes a ladder 6, which is a truss structure. The ladder 6 is set according to the inclined angle of the installed gate slot. The height of the ladder 6 matches the distance between the gate slot lintel and the bottom sill. Several sets of operating platforms 7 are provided on the ladder 6, and ladders are provided between each operating platform. The lower end of the ladder 6 is set on the bottom sill 1. A pre-embedded support column 8 is provided on one side of the ladder 6. The upper end of the ladder 6 is connected to the pre-embedded support column 8 through a connector 9, which serves as the support point for the upper end of the ladder 6. A stop block 13 is provided on the bottom sill 1 to limit the lower end of the ladder 6.

[0041] The ladder 6 has a main rail slide mounting base 10, a lintel mounting base 11, and a water seal plate mounting base 12 on one side. Each base can be manufactured in sections and assembled on site. During assembly, it is necessary to ensure that its flatness and relative dimensional deviation meet the specifications. During construction, the main rail slide mounting base 10, the lintel mounting base 11, and the water seal plate mounting base 12 provide mounting reference surfaces for the main rail 2, the lintel 3, and the main rail water seal plate 4, respectively.

[0042] Preferred, such as Figures 9-10 As shown, a main rail fixing mechanism is provided between the pre-embedded support column 8 and the main rail slide mounting reference seat 10. The main rail fixing mechanism includes a support seat 17 connected to the pre-embedded support column 8. An adjusting screw 18 connected to the main rail 2 is provided on the support seat 17. The adjusting screw 18 passes through the mounting hole on the main rail 2 and is tightened by a nut 19.

[0043] The main rail fixing mechanism ensures that the main rail 2 and the main rail water seal seat plate 4 are tightly attached to the main rail slide mounting reference seat 10 and the water seal seat plate mounting reference seat 12, respectively.

[0044] Preferred, such as Figure 3 As shown, the ladder 6 is provided with several top support mechanisms on one side for adjusting the position of the reverse rail 5. The top support mechanism includes a mounting base 14 on the ladder 6. The mounting base 14 is provided with a threaded hole that mates with the top support screw 15. The end of the top support screw 15 is provided with a top support plate 16. By adjusting the extension length of the top support screw 15, the distance between the reverse rail 5 and the main rail 2 can be controlled. After the reverse rail 5 is adjusted into place, its bottom end is welded and fixed to the bottom sill 1. The top non-working surface is welded and fixed to the ladder 6 by steel profiles.

[0045] The top support mechanism located at the part where the concrete has been poured can also play a role in fixing the ladder 6.

[0046] Preferred, such as Figures 11-12As shown, the ladder 6 is symmetrically equipped with forward sliders 20, reverse sliders 21, and lateral sliders 22 at three positions: left and right, top and middle, and bottom. Forward sliders 20 correspond to the main rail 2, while reverse sliders 21 and lateral sliders 22 correspond to the reverse rail 5. The forward sliders 20, reverse sliders 21, and lateral sliders 22 are detachably connected to the ladder 6 by bolts. To avoid affecting the installation of the door slot, the sliders are removed before the door slot is installed. After the door slot embedded parts, such as the main rail 2 and the reverse rail 5, are installed and poured, the sliders are installed before the ladder is lifted. During the upward lifting of the ladder 6, the forward sliders 20, reverse sliders 21, and lateral sliders 22 move within the door slot to perform a trial slot function. During the trial slot, the lifting and movement of the ladder 6 can also be achieved using lifting equipment.

[0047] Preferred, such as Figures 11-13 As shown, the ladder 6 is provided with climbing rails 23 on both sides, and a number of limiting holes 2301 are provided on the climbing rails 23. The limiting holes 2301 are set along the length direction of the climbing rails 23. A number of positioning claws 24 are installed in the door slot. Specifically, positioning cones are pre-embedded on both sides of the door slot, and the positioning claws 24 are installed on the positioning cones. The positioning claws 24 cooperate with the climbing rails 23. Positioning plates 25 are inserted into the limiting holes 2301. The positioning plates 25 are set on the lower side of the positioning claws 24.

[0048] By cooperating with the positioning claw 24 and the climbing rail 23, the movement of the ladder 6 in the left and right directions can be restricted during the lifting process. After the ladder 6 moves into place, the positioning plate 25 is inserted into the limiting hole 2301. The positioning plate 25 is set on the lower side of the positioning claw 24, which can restrict the movement of the ladder 6 in the up and down directions, and finally lock the ladder.

[0049] Furthermore, the ladder 6 climbs via a self-climbing mechanism, which includes a climbing cylinder 26, a track ear plate 27 on the outer side of the climbing track 23, multiple track ear plates 27 arranged along the length of the track, a support ear plate 28 on the upper side of the positioning claw 24, and connecting ear plates 29 at both the lower end and the telescopic end of the climbing cylinder 26. The connecting ear plate 29 at the telescopic end of the climbing cylinder 26 is connected to the track ear plate 27 by a pin, and the connecting ear plate 29 at the lower end of the climbing cylinder 26 is connected to the support ear plate 28 by a pin.

[0050] In practical use, the positioning plate 25 is pulled out and unlocked. The ladder 6 is lifted upward by extending the climbing cylinder 26. After the climbing cylinder 26 extends to its maximum stroke, the positioning plate 25 is inserted into the limiting hole 2301 to limit the ladder 6 in the up and down directions. Then, the connecting pin between the climbing cylinder 26 and the ear plate 27 is removed, the climbing cylinder 26 retracts and connects to the next track ear plate 27 on the climbing track 23, and so on until the ladder 6 is lifted to the designated position.

[0051] A construction method for a direct-buried construction device for the inclined gate slot of a hydropower station arch dam in the first phase includes the following steps:

[0052] Step 1: Set up a fixed reference point outside the pouring chamber for measuring and setting out the position of the door slot embedded part. The door slot embedded part is installed with the center line of the opening and the center line of the door slot as the reference.

[0053] The pre-embedded support column 8 is pre-installed. The pre-embedded support column 8 is formed by welding of steel profiles. The overall structure should be stable and reliable, with sufficient rigidity and strength to avoid its own deformation affecting the installation quality of the door groove embedded parts.

[0054] The support for the bottom sill 1 is pre-embedded, and then the concrete for the bottom sill 1 is poured.

[0055] Step 2: After the bottom sill 1 is poured to the required strength, the ladder 6 is hoisted. After the ladder 6 is positioned, the upper end is connected to the pre-embedded support column 8 through the connector 9. The stop block 13 is welded on the bottom sill 1 to limit the lower end of the ladder 6.

[0056] The installation of ladder 6 requires ensuring its tilt, the distance deviation between the ladder and the center line of the door groove and the center line of the opening, and the stability of its own structure.

[0057] Step 3: Installation of the lintel 3 and the main rails 2 and reverse rails 5 below the height of the lintel 3. The main rails 2 and reverse rails 5 need to be inspected before installation to ensure that all dimensions meet the specifications. The embedded parts of the water-sealing section below the lintel can be installed in sections along with the dam body pouring, or they can be installed and inspected as a whole. The main rails 2 and reverse rails 5 are installed in sections. The main rail 2 is installed against the main rail slide reference seat 10, and the main rail water seal seat plate 4 is simultaneously installed against the water seal seat plate reference seat 12. The main rail 2 is connected to the pre-embedded support column 8 through the main rail fixing mechanism. The lower end of the reverse rail 5 is welded and fixed to the bottom sill 1, and the top non-working surface is welded and fixed to the ladder 6 through steel sections. The lintel 3 is installed against the lintel reference seat 11, and both ends are welded and fixed to the main rail water seal seat plate 4. Concrete is poured around the main rails 2 and reverse rails 5.

[0058] Step 4: Install the main rail 2 and reverse rail 5 above the height of the lintel 3. Remove the connecting parts 9 between the ladder 6 and the pre-embedded support column 8, as well as other connecting mechanisms. Lift the ladder 6 and then fix it. Before lifting the ladder 6, pre-embed positioning cones for fixing the ladder 6. Pre-embed positioning cones on both sides of the door groove, and install positioning claws 24 on the positioning cones. The positioning cones should ensure that 1 / 2 of the length of the ladder 6 is located within the poured door groove, and ensure that the ladder main rail slide mounting base 10 and the ladder water seal base plate mounting base 12 are tightly fitted to the poured main rail slide and water seal base plate, respectively. Use steel sections to spot weld the non-working surface of the poured track to the ladder 6 for reinforcement. After the main and reverse rails are adjusted, the non-working surface is fixed to the ladder 6 by welding steel sections, and the back anchor bars are fixed to the pre-embedded standardized steel sections on the platform. Then install and pour the main rail 2 and reverse rail 5 above the height of the lintel 3.

[0059] Before the ladder 6 is lifted, forward sliders 20, reverse sliders 21, and lateral sliders 22 are symmetrically installed on the left, right, upper, middle, and lower positions of the ladder 6. During the lifting process of the ladder 6, forward sliders 20, reverse sliders 21, and lateral sliders 22 move along the cast-in-place door groove to complete the test groove.

[0060] The ladder 6 is lifted upward by extending the climbing cylinder 26. After the climbing cylinder 26 extends to its maximum stroke, the positioning plate 25 is inserted into the limiting hole 2301 to limit the ladder 6 in the up and down directions. Then, the connecting pin between the climbing cylinder 26 and the ear plate 27 is removed, the climbing cylinder 26 retracts and connects to the next ear plate 27 on the climbing track 23, and so on until the ladder 6 is lifted to the designated position.

[0061] The Baihetan Hydropower Station dam deep-hole emergency gate slots adopted the above-mentioned construction equipment and methods. During the flow channel inspection of flood discharge deep holes 1 to 7 in 2022, each gate slot and emergency gate successfully completed water commissioning. There was no obstruction during the gate closing process. The water seal of the gate in the fully closed position and the water-stopping effect of the gate slot embedded parts were good, basically achieving zero leakage.

[0062] Table 1. Inspection results of the installation of deep hole accident gate slots (Nos. 1-7) (Unit: mm)

[0063]

[0064] Using this ladder system for the first-stage direct burial of the door slot allows for a single, unified layout of the water-sealing section below the lintel, avoiding cumulative errors caused by multiple layouts and segmented installations. Furthermore, the main rail 2 and water seal plate 4 are closely attached to the main rail slide mounting base 10 and water seal plate mounting base 12 on the ladder, further preventing cumulative errors from manual measurement and reading. The fixing method is also more reliable. In summary, this construction process fully incorporates the advantages of the second-stage door slot construction (unified, unified layout of the lintel and below, and a more reliable fixing method), shortening the construction period while ensuring construction quality and safety. It also has significant application value for straight door slots.

Claims

1. A device for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams, characterized in that, Includes a ladder (6), which is set according to the tilt angle of the installation door slot. The ladder (6) is equipped with several sets of operating platforms (7), and ladders are provided between each operating platform (7). The lower end of the ladder (6) is set on the bottom sill (1). A pre-embedded support column (8) is provided on one side of the ladder (6). The upper end of the ladder (6) is connected to the pre-embedded support column (8) through a connector (9). A main rail slide installation reference seat (10), a lintel installation reference seat (11), and a water seal plate installation reference seat (12) are provided on one side of the ladder (6). During construction, the main rail slide installation reference seat ( 10) The lintel mounting base (11) and the water seal plate mounting base (12) provide mounting reference surfaces for the main rail (2), the lintel (3) and the main rail water seal plate (4), respectively. A main rail fixing mechanism is provided between the pre-embedded support column (8) and the main rail slide mounting base (10). The main rail fixing mechanism includes a support base (17) connected to the pre-embedded support column (8). An adjusting screw (18) connected to the main rail (2) is provided on the support base (17). The adjusting screw (18) passes through the mounting hole on the main rail (2) and is tightened by a nut (19).

2. The device for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams according to claim 1, characterized in that, The bottom threshold (1) is provided with a stop block (13) to limit the lower end of the ladder (6).

3. The device for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams according to claim 1, characterized in that, The ladder (6) is provided with several top support mechanisms on one side for adjusting the position of the anti-rail (5). The top support mechanism includes a mounting seat (14) on the ladder (6). The mounting seat (14) is provided with a threaded hole that mates with the top support screw (15). The top support screw (15) is provided with a top support plate (16) at its end.

4. The device for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams according to claim 1, characterized in that, The ladder (6) is equipped with a forward slider (20), a reverse slider (21) and a side slider (22) at the top, middle and bottom positions. The forward slider (20) is set to the main rail (2), and the reverse slider (21) and the side slider (22) are set to the reverse rail (5).

5. The device for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams according to claim 1, characterized in that, The ladder (6) is provided with climbing rails (23) on both sides. The climbing rails (23) are provided with several limiting holes (2301). Several positioning claws (24) are installed in the door slot. The positioning claws (24) cooperate with the climbing rails (23). The positioning plate (25) is inserted into the limiting hole (2301). The positioning plate (25) is located on the lower side of the positioning claw (24).

6. The device for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams according to claim 5, characterized in that, The ladder (6) climbs by means of a self-climbing mechanism, which includes a climbing cylinder (26), a track ear plate (27) on the outside of the climbing track (23), a support ear plate (28) on the upper side of the positioning claw (24), and a connecting ear plate (29) on the lower end and the telescopic end of the climbing cylinder (26). The connecting ear plate (29) at the telescopic end of the climbing cylinder (26) is connected to the track ear plate (27) by a pin, and the connecting ear plate (29) at the lower end of the climbing cylinder (26) is connected to the support ear plate (28) by a pin.

7. A construction method for a device used in the first-phase direct burial construction of an inclined gate slot for an arch dam in a hydropower station, as described in any one of claims 1 to 6, characterized in that... Includes the following steps: Step 1: Pre-embed the support column (8) and pre-embed the bracket of the bottom sill (1). Then pour the bottom sill (1). Step 2: After the bottom sill (1) is poured to the required strength, the ladder (6) is hoisted. After the ladder (6) is positioned, the upper end is connected to the pre-embedded support column (8) through the connector (9). Stop block (13) is welded on the bottom sill (1) to limit the lower end of the ladder (6). Step 3: Install the lintel (3) and the main rail (2) and reverse rail (5) below the height of the lintel (3). The main rail (2) and reverse rail (5) are installed in sections. The main rail (2) is installed with the reference seat (10) close to the main rail slide. The main rail water seal seat plate (4) is installed with the reference seat (12) close to the water seal seat plate. The main rail (2) is connected to the pre-embedded support column (8) through the main rail fixing mechanism. The lower end of the reverse rail (5) is welded and fixed to the bottom sill (1). The top is not finished. The working surface is welded and fixed to the ladder (6) by steel profiles. The installation height of the main rail (2) and the reverse rail (5) is matched with the concrete pouring height. After the installation of the main rail (2) and the reverse rail (5) is accepted, the concrete pouring operation is carried out. The installation of other sections of the main rail (2) and the reverse rail (5) is carried out in the same way until the lintel (3) is installed. The lintel (3) is set close to the lintel installation reference seat (11) and welded and fixed to the water seal seat plate (4) of the main rail at both ends. Step 4: Install the main rail (2) and the reverse rail (5) above the height of the lintel (3), remove the connecting parts (9) between the ladder (6) and the pre-embedded support (8) and other connecting mechanisms, lift the ladder (6), fix the ladder (6) after lifting, and then install and pour the main rail (2) and the reverse rail (5) above the height of the lintel (3).

8. The construction method of the device for the first-phase direct burial construction of the inclined gate slot of the arch dam of a hydropower station according to claim 7, characterized in that, In step four, positioning cones are pre-embedded on both sides of the door slot, positioning claws (24) are installed on the positioning cones, and climbing cylinders (26) are hinged and fixed between positioning claws (24) and climbing rails (23). By extending the climbing cylinders (26), the ladder (6) is lifted upward. After the climbing cylinders (26) extend to their maximum stroke, positioning plates (25) are inserted into limiting holes (2301) to limit the ladder (6) in the upper and lower directions. Then, the connecting pins between the climbing cylinders (26) and the ear plates (27) are removed, the climbing cylinders (26) retract and connect with the next track ear plate (27) on the climbing rails (23), and so on until the ladder (6) is lifted to the designated position.

9. The construction method of the device for the first-phase direct burial construction of the inclined gate slot of the arch dam of a hydropower station according to claim 7, characterized in that, Before the ladder (6) is lifted, a forward slider (20), a reverse slider (21) and a lateral slider (22) are installed on the ladder (6). During the lifting process of the ladder (6), the forward slider (20), the reverse slider (21) and the lateral slider (22) move along the cast-in-place door groove to complete the test groove.

Images