A trench excavation support device for water conservancy and hydropower construction

Abstract

The present invention relates to the field of trench excavation support technology, specifically a trench excavation support device for water conservancy and hydropower construction, comprising a wheel frame, the wheel frame being rotatably connected to a plurality of casters, and further comprising: a spacing control structure connected to the wheel frame; two sets of support assembly structures connected to the spacing control structure, the support assembly structure comprising an unwinding and shaping mechanism connected to the spacing control structure, the unwinding and shaping mechanism being connected to a mudguard belt, the mudguard belt being provided with a plurality of through-holes, a soil nailing portion being provided above the unwinding and shaping mechanism, a plurality of limit nail plates being installed in the soil nailing portion, the through-hole shape being adapted to the cross-sectional shape of the limit nail plates, and a knocking portion being provided above the mudguard belt. The present invention facilitates the completion of trench support and layout operations while moving by cooperating with the spacing control structure and the support assembly structure, which is convenient and quick.

Description

Technical Field

[0001] The invention relates to the technical field of trench excavation support, in particular to a trench excavation support device for water conservancy and hydropower construction. Background Art

[0002] Water conservancy projects are projects built to eliminate water disasters and develop and utilize water resources. According to their service objects, they are divided into flood control projects, agricultural water conservancy projects, hydropower projects, waterway and port projects, water supply and drainage projects, environmental water conservancy projects, and tidal flat reclamation projects.

[0003] During trench excavation, if the trench is deep, side supports are required to limit and protect the excavated trench to prevent it from collapsing. Usually, support structures need to be manually placed in the trench to support the trench walls. Furthermore, since support structures are often used in combination with each other, additional effort is required to connect adjacent support structures. Furthermore, some support structures also require on-site manual assembly, which wastes manpower and is very inconvenient. Summary of the Invention

[0004] The purpose of the present invention is to provide a trench excavation support device for water conservancy and hydropower construction to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A trench excavation support device for water conservancy and hydropower construction includes a wheel frame, the wheel frame is rotatably connected to a plurality of casters, the wheel frame is fixedly connected to a traction head, the wheel frame is fixedly connected to a camera, and further includes:

[0007] a spacing control structure connected to the wheel frame;

[0008] Two groups of support assembly structures are connected to the spacing control structure, and the support assembly structure includes a reeling and shaping mechanism connected to the spacing control structure, the reeling and shaping mechanism is connected to a mud guard belt, and multiple groups of through holes are provided on the mud guard belt. A soil nail delivery part is provided above the reeling and shaping mechanism, and the soil nail delivery part is connected to the spacing control structure. Multiple groups of limiting nail plates are installed in the soil nail delivery part, and the shape of the through hole is adapted to the cross-sectional shape of the limiting nail plate. The length of the limiting nail plate is longer than the length of the through hole. A knocking part is provided above the mud guard belt, and the knocking part is connected to the spacing control structure. The knocking part is used to knock the limiting nail plate in the through hole.

[0009] As a further improvement of the present invention: the spacing control structure includes multiple groups of first active telescopic frames fixedly connected to the wheel frame, the moving end of the first active telescopic frame is fixedly connected to the trough frame, the middle part of the trough frame is fixedly installed with a double-output shaft motor, the output end of the double-output shaft motor is fixedly connected to a screw rod, the screw rod is threadedly connected to a hanger slidably connected to the trough frame, the hanger is connected to the unwinding and shaping mechanism, the hanger is connected to the soil nail placing part, and the hanger is connected to the knocking part.

[0010] As a further improvement of the present invention: the unwinding and shaping mechanism includes a winding cover fixedly connected to the hanger, the winding cover is fixedly connected to a first motor, the output shaft of the first motor is fixedly connected to a pulley arranged in the winding cover, the pulley is wound and connected to the mud guard belt, the opening of the winding cover is fixedly connected to a bending belt cover, the bending belt cover is slidingly connected to the mud guard belt, a fixed cover is fixedly installed on the bending belt cover, the fixed cover is fixedly connected to a second motor, the output shaft of the second motor is fixedly connected to a driving wheel, the outer wall of the driving wheel is fixedly connected to an elastic friction sleeve, the elastic friction sleeve is in contact with the mud guard belt, the bending belt cover is fixedly connected to two sets of splints, the splints are slidingly connected to the mud guard belt, and the two sets of splints are arranged parallel to each other.

[0011] As a further improvement of the present invention: the soil nail placing part includes a protective shell fixedly connected to the hanger, the protective shell is movably connected to a feeding cover plate, an outlet is provided on the lower end surface of the protective shell, and two sets of arc-shaped guide strips are fixedly connected to the outlet, a rotary guide frame is fixedly installed in the protective shell, and multiple sets of linkage frames are slidably installed on the rotary guide frame, and the multiple sets of linkage frames are fixedly connected to toothed belts, a third motor is fixedly installed in the protective shell, and the output shaft of the third motor is fixedly connected to a gear meshing with the toothed belt, and the linkage frame is fixedly connected to six symmetrically arranged guide shells, and each set of guide shells has a sliding A clamping frame movably connected to the limiting nail plate is movably installed, and a return spring is installed between the guide shell and the clamping frame. Three groups of clamping frames arranged on the same side of the limiting nail plate are commonly fixedly connected to a group of longitudinal plates, and the longitudinal plates are fixedly connected to the inclined platform. Two groups of driving components are fixedly installed in the protective shell, and each group of driving components includes two groups of symmetrically arranged second active telescopic frames, the second active telescopic frames are fixedly connected to the protective shell, and the moving end of the second active telescopic frame is fixedly connected to a trapezoidal block, which is used to apply driving force to the inclined surface of the inclined platform. One group of driving components is arranged above the outlet, and the other group of driving components is arranged below the feeding cover.

[0012] As a further improvement of the present invention: the knocking part includes a power shell fixedly connected to the hanger, the power shell is fixedly connected to the fourth motor, the output shaft of the fourth motor is fixedly connected to the rotating frame, the rotating frame is hinged to the articulated frame, the articulated frame is hinged to the slider, the slider is slidably connected to the knocking head, the knocking head is slidably connected to the power shell, and a buffer spring is installed between the knocking head and the slider.

[0013] As a further improvement of the present invention: the limiting nail plate includes a plate body movably connected to the clamping frame, a tip is provided at the bottom of the plate body, and two groups of L-shaped plates are fixedly connected to the top of the plate body.

[0014] As a further improvement of the present invention: a group of L-shaped plates abuts against a group of clamping frames.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] When in use, the present invention is towed by connecting a towing head to a towing vehicle, so that the present invention moves along the groove. During this period, the casters roll on the ground, and the spacing control structure controls the spacing between the two sets of support assembly structures, so that the two sets of unwinding and shaping mechanisms are close to the groove wall. During the movement of the present invention, the unwinding and shaping mechanism continuously releases the mud guard belt. During this period, the soil nail delivery part delivers the limiting nail plate into the through hole. Then, as the limiting nail plate is driven by the mud guard belt to the bottom of the knocking part, the knocking part knocks the limiting nail plate in the mud guard belt, so that the limiting nail plate is nailed into the soil at the bottom of the groove. At the same time, the limiting nail plate provides a limit for the mud guard belt, thereby realizing rapid support for the groove. The present invention cooperates with the support assembly structure to facilitate the completion of the support layout operation of the groove during movement, saving manpower and being convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0019] Figure 3 A schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the spacing control structure of the present invention;

[0021] Figure 5 Schematic diagram of the internal three-dimensional structure of the unwinding and shaping mechanism of the present invention;

[0022] Figure 6 For the present invention Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotary guide frame, linkage frame, toothed belt, guide shell, clamping frame, longitudinal plate and inclined platform cooperating with each other in the present invention;

[0024] Figure 8 For the present invention Figure 7 A partial enlarged schematic diagram of point C in the middle;

[0025] Figure 9 It is a schematic diagram of the three-dimensional structure of the toothed belt, the third motor and the gears cooperating with each other in the present invention;

[0026] Figure 10 It is a schematic diagram of the three-dimensional structure of the unwinding and shaping mechanism and the mudguard belt cooperating with each other in the present invention;

[0027] Figure 11 It is a schematic diagram of the internal three-dimensional structure of the mudguard and the curved belt cover cooperating with each other in the present invention;

[0028] Figure 12 It is a schematic diagram of the three-dimensional structure of the winding cover, the first motor and the pulley cooperating with each other in the present invention;

[0029] Figure 13 This is a schematic diagram of the internal three-dimensional structure of the fixed cover, the second motor, the driving wheel, and the elastic friction sleeve that cooperate with each other in the present invention;

[0030] Figure 14 Schematic diagram of the internal three-dimensional structure of the striking part of the present invention;

[0031] Figure 15 It is a schematic structural diagram of the cooperation between the slider and the striking head of the present invention.

[0032] Figure: 1, wheel frame; 2, traction head; 3, spacing control structure; 4, support assembly structure; 5, unwinding and shaping mechanism; 6, mud guard belt; 7, through hole; 8, soil nailing part; 9, limit nail plate; 10, knocking part; 11, first active telescopic frame; 12, trough frame; 13, double-output shaft motor; 14, screw rod; 15, hanger; 16, winding cover; 17, first motor; 18, pulley; 19, bending belt cover; 20, fixed cover; 21, second motor; 22, driving wheel; 23, elastic friction sleeve; 24, clamp Plate; 25. Protective shell; 26. Feed cover; 27. Outlet; 28. Arc guide strip; 29. Rotating guide frame; 30. Linkage frame; 31. Toothed belt; 32. Third motor; 33. Gear; 34. Guide shell; 35. Clamp; 36. Longitudinal plate; 37. Inclined table; 38. Drive assembly; 39. Second active telescopic frame; 40. Trapezoidal block; 41. Power shell; 42. Fourth motor; 43. Rotating frame; 44. Articulated frame; 45. Slider; 46. Striking head; 47. Plate body; 48. L-shaped plate. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0034] Example 1, see Figures 1 to 15 As shown, a trench excavation support device for water conservancy and hydropower construction includes a wheel frame 1, which is rotatably connected to multiple sets of casters. The wheel frame 1 is fixedly connected to a traction head 2, which is used to connect to a traction vehicle. The wheel frame 1 is fixedly connected to a camera for monitoring the construction process, and further includes:

[0035] A spacing control structure 3 connected to the wheel frame 1;

[0036] Two groups of support assembly structures 4 are connected to the spacing control structure 3, and the support assembly structure 4 includes a reeling and shaping mechanism 5 connected to the spacing control structure 3, the reeling and shaping mechanism 5 is connected to a mud guard belt 6, and multiple groups of through holes 7 are opened on the mud guard belt 6, and a soil nail placing part 8 is arranged above the reeling and shaping mechanism 5, and the soil nail placing part 8 is connected to the spacing control structure 3, and multiple groups of limiting nail plates 9 are installed in the soil nail placing part 8, the shape of the through hole 7 is adapted to the cross-sectional shape of the limiting nail plate 9, and the length of the limiting nail plate 9 is longer than the length of the through hole 7, and a knocking part 10 is arranged above the mud guard belt 6, and the knocking part 10 is connected to the spacing control structure 3, and the knocking part 10 is used to knock the limiting nail plate 9 in the through hole 7.

[0037] When in use, the present invention is towed by connecting the towing head 2 to a towing vehicle, so that the present invention moves along the groove. During this period, the casters roll on the ground, and the spacing control structure 3 controls the spacing between the two sets of support assembly structures 4, so that the two sets of unwinding and shaping mechanisms 5 are close to the groove wall. During the movement of the present invention, the unwinding and shaping mechanism 5 continuously releases the mudguard 6. During this period, the soil nail delivery part 8 delivers the limiting nail plate 9 into the through hole 7. Then, as the limiting nail plate 9 is driven by the mudguard 6 to the bottom of the knocking part 10, the knocking part 10 knocks the limiting nail plate 9 in the mudguard 6, so that the limiting nail plate 9 is nailed into the soil at the bottom of the groove. At the same time, the limiting nail plate 9 provides a limit for the mudguard 6, thereby realizing rapid support for the groove. The present invention cooperates with the support assembly structure 4 to facilitate the completion of the support layout operation of the groove during movement, saving manpower and being convenient and fast.

[0038] In one case of this embodiment, the spacing control structure 3 includes multiple groups of first active telescopic frames 11 fixedly connected to the wheel frame 1, the movable end of the first active telescopic frame 11 is fixedly connected to the trough frame 12, the middle part of the trough frame 12 is fixedly installed with a double-output shaft motor 13, the output end of the double-output shaft motor 13 is fixedly connected to a screw rod 14, the screw rod 14 is threadedly connected to a hanger 15 slidably connected to the trough frame 12, the hanger 15 is connected to the unwinding and shaping mechanism 5, the hanger 15 is connected to the soil nail placing part 8, and the hanger 15 is connected to the knocking part 10. The first active telescopic frame 11 drives the trough frame 12 to move to adjust the height of the hanger 15 and the double-output shaft motor 13, thereby adjusting the height of the unwinding and shaping mechanism 5, the soil nail placing part 8, and the knocking part 10, so that the support assembly structure 4 moves into the groove. The double-output shaft motor 13 drives the screw rod 14 to rotate, and the rotating screw rod 14 drives the hanger 15 to slide along the trough frame 12, thereby adjusting the spacing between the hangers 15, and then adjusting the spacing between the two groups of support assembly structures 4 to adapt to grooves of different widths.

[0039] In one case of this embodiment, the unwinding and shaping mechanism 5 includes a winding cover 16 fixedly connected to the hanger 15, the winding cover 16 is fixedly connected to a first motor 17, the output shaft of the first motor 17 is fixedly connected to a pulley 18 arranged in the winding cover 16, the pulley 18 is wound around the mud guard belt 6, that is, the mud guard belt 6 is wound on the pulley 18, the opening of the winding cover 16 is fixedly connected to a bending cover 19, the bending cover 19 is slidingly connected to the mud guard belt 6, a fixed cover 20 is fixedly installed on the bending cover 19, the fixed cover 20 is fixedly connected to a second motor 21, the output shaft of the second motor 21 is fixedly connected to a driving wheel 22, the outer wall of the driving wheel 22 is fixedly connected to an elastic friction sleeve 23, the elastic friction sleeve 23 is in contact with the mud guard belt 6, the bending cover 19 is fixedly connected to two groups of splints 24, the splints 24 are slidingly connected to the mud guard belt 6, and the two groups of splints 24 are arranged parallel to each other. The first motor 17 drives the pulley 18 to rotate, and the rotating pulley 18 releases the mudguard belt 6 into the curved belt cover 19, so that the mudguard belt 6 bends and approaches the bottom surface of the groove. During this period, the second motor 21 applies a driving force to the driving wheel 22, so that the driving wheel 22 drives the elastic friction sleeve 23 to rotate, so that the elastic friction sleeve 23 further drives the mudguard belt 6 to move. The two sets of splints 24 are used to limit and guide the mudguard belt 6 to keep the mudguard belt 6 flat.

[0040] In one case of this embodiment, the soil nail placing part 8 includes a protective shell 25 fixedly connected to the hanger 15, the protective shell 25 is movably connected to the feeding cover 26, the lower end surface of the protective shell 25 is provided with an outlet 27, the outlet 27 is fixedly connected to two groups of arc-shaped guide strips 28, a rotary guide frame 29 is fixedly installed in the protective shell 25, and multiple groups of linkage frames 30 are slidably installed on the rotary guide frame 29, and the multiple groups of linkage frames 30 are fixedly connected to toothed belts 31, a third motor 32 is fixedly installed in the protective shell 25, and the output shaft of the third motor 32 is fixedly connected to a gear 33 meshing with the toothed belt 31, and the linkage frame 30 is fixedly connected to six symmetrically arranged guide shells 34, each group of guide shells 34 is sliding. A clamping frame 35 movably connected to the limiting nail plate 9 is installed, and a return spring is installed between the guide shell 34 and the clamping frame 35. The three groups of clamping frames 35 arranged on the same side of the limiting nail plate 9 are commonly fixedly connected to a group of longitudinal plates 36, and the longitudinal plates 36 are fixedly connected to the inclined platform 37. Two groups of driving components 38 are fixedly installed in the protective shell 25, and each group of driving components 38 includes two groups of symmetrically arranged second active telescopic frames 39, which are fixedly connected to the protective shell 25. The moving end of the second active telescopic frame 39 is fixedly connected to a trapezoidal block 40, which is used to apply driving force to the inclined surface of the inclined platform 37. One group of driving components 38 is arranged above the outlet 27, and the other group of driving components 38 is arranged below the feeding cover 26. The third motor 32 drives the gear 33 to rotate, and the rotating gear 33 drives the toothed belt 31 to move. The toothed belt 31 drives the linkage frame 30 to move along the rotary guide frame 29, and the linkage frame 30 drives the guide shell 34 to move, so that the clamping frame 35 drives the limiting nail plate 9 to move. As the limiting nail plate 9 moves to the top of the outlet 27, the second active telescopic frame 39 placed above the outlet 27 drives the trapezoidal block 40 to squeeze the inclined platform 37, so that the inclined platform 37 drives the clamping frame 35 through the longitudinal plate 36. 5 moves, thereby causing the clamping frame 35 to release the limiting nail plate 9, and the limiting nail plate 9 falls toward the through hole 7 through the outlet 27. During this period, the arc-shaped guide strip 28 provides limiting guidance for the falling limiting nail plate 9, so that the limiting nail plate 9 falls into the through hole 7. When it is necessary to replenish the limiting nail plate 9 into the soil nail placing portion 8, the filling cover 26 is opened, and the driving assembly 38 disposed under the filling cover 26 is used to drive the inclined platform 37, so that the limiting nail plate 9 is conveniently placed between the clamping frames 35.

[0041] In one case of this embodiment, the striking part 10 includes a power shell 41 fixedly connected to the hanger 15, the power shell 41 is fixedly connected to a fourth motor 42, the output shaft of the fourth motor 42 is fixedly connected to a rotating frame 43, the rotating frame 43 is hinged to an articulated frame 44, the articulated frame 44 is hinged to a slider 45, the slider 45 is slidably connected to a striking head 46, the striking head 46 is slidably connected to the power shell 41, and a buffer spring is installed between the striking head 46 and the slider 45. The fourth motor 42 drives the rotating frame 43 to rotate, the rotating frame 43 drives the articulated frame 44 to swing during movement, the moving articulated frame 44 drives the slider 45 to reciprocate longitudinally, and the slider 45 drives the striking head 46 to move via the buffer spring, so that the striking head 46 performs a striking operation on the limiting nail plate 9.

[0042] In one aspect of this embodiment, the limiting nail plate 9 includes a plate body 47 movably connected to the clamping frame 35. The bottom of the plate body 47 is provided with a pointed tip, and two sets of L-shaped plates 48 are fixedly connected to the top of the plate body 47. The pointed structure at the bottom of the plate body 47 facilitates the insertion of the plate body 47 into the through hole 7 and the soil. The L-shaped plates 48 also press down on the top of the mudguard 6 to further limit its movement.

[0043] Example 2, based on Example 1, refer to Figures 5 to 8 , a group of L-shaped plates 48 abut against a group of clamping frames 35. The clamping frames 35 provide limiting support for the limiting nail plate 9 by removing the bottom of the L-shaped plates 48.

[0044] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions, and alterations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A trench excavation support device for water conservancy and hydropower construction, comprising a wheel frame, the wheel frame being rotatably connected to a plurality of casters, the wheel frame being fixedly connected to a traction head, and the wheel frame being fixedly connected to a camera, characterized in that: Also includes: a spacing control structure connected to the wheel frame; Two groups of support assembly structures are connected to the spacing control structure, and the support assembly structure includes a reeling and shaping mechanism connected to the spacing control structure, the reeling and shaping mechanism is connected to a mud guard belt, and multiple groups of through holes are provided on the mud guard belt. A soil nail delivery part is provided above the reeling and shaping mechanism, and the soil nail delivery part is connected to the spacing control structure. Multiple groups of limiting nail plates are installed in the soil nail delivery part, and the shape of the through hole is adapted to the cross-sectional shape of the limiting nail plate. The length of the limiting nail plate is longer than the length of the through hole. A knocking part is provided above the mud guard belt, and the knocking part is connected to the spacing control structure. The knocking part is used to knock the limiting nail plate in the through hole.

2. A trench excavation support device for water conservancy and hydropower construction according to claim 1, characterized in that: The spacing control structure includes multiple groups of first active telescopic frames fixedly connected to the wheel frame, the moving end of the first active telescopic frame is fixedly connected to the trough frame, the middle part of the trough frame is fixedly installed with a double-output shaft motor, the output end of the double-output shaft motor is fixedly connected to a screw rod, the screw rod is threadedly connected to a hanger slidably connected to the trough frame, the hanger is connected to the unwinding and shaping mechanism, the hanger is connected to the soil nail placing part, and the hanger is connected to the knocking part.

3. A trench excavation support device for water conservancy and hydropower construction according to claim 2, characterized in that: The unwinding and shaping mechanism includes a winding cover fixedly connected to the hanger, the winding cover is fixedly connected to the first motor, the output shaft of the first motor is fixedly connected to a pulley arranged in the winding cover, the pulley is wound and connected to the mud guard belt, the opening of the winding cover is fixedly connected to a bending cover, the bending cover is slidably connected to the mud guard belt, a fixed cover is fixedly installed on the bending cover, the fixed cover is fixedly connected to the second motor, the output shaft of the second motor is fixedly connected to the driving wheel, the outer wall of the driving wheel is fixedly connected to an elastic friction sleeve, the elastic friction sleeve is in contact with the mud guard belt, the bending cover is fixedly connected to two groups of splints, the splints are slidably connected to the mud guard belt, and the two groups of splints are arranged parallel to each other.

4. A trench excavation support device for water conservancy and hydropower construction according to claim 2, characterized in that: The soil nail placing part includes a protective shell fixedly connected to the hanger, the protective shell is movably connected to a feeding cover plate, an outlet is provided on the lower end surface of the protective shell, two sets of arc-shaped guide strips are fixedly connected to the outlet, a rotary guide frame is fixedly installed in the protective shell, multiple sets of linkage frames are slidably installed on the rotary guide frame, multiple sets of linkage frames are fixedly connected to toothed belts, a third motor is fixedly installed in the protective shell, the output shaft of the third motor is fixedly connected to a gear meshing with the toothed belt, the linkage frame is fixedly connected to six sets of guide shells arranged symmetrically, and a gear meshing with a limit gear is slidably installed in each set of guide shells. A clamping frame movably connected to the nail plate, a return spring is installed between the guide shell and the clamping frame, three groups of clamping frames arranged on the same side of the limiting nail plate are commonly fixedly connected to a group of longitudinal plates, the longitudinal plates are fixedly connected to the inclined platform, and two groups of drive components are fixedly installed in the protective shell, each group of drive components includes two groups of symmetrically arranged second active telescopic frames, the second active telescopic frames are fixedly connected to the protective shell, and the moving end of the second active telescopic frame is fixedly connected to a trapezoidal block, the trapezoidal block is used to apply driving force to the inclined surface of the inclined platform, one group of drive components is arranged above the outlet, and the other group of drive components is arranged below the feeding cover.

5. A trench excavation support device for water conservancy and hydropower construction according to claim 2, characterized in that: The knocking part includes a power shell fixedly connected to the hanger, the power shell is fixedly connected to the fourth motor, the output shaft of the fourth motor is fixedly connected to the rotating frame, the rotating frame is hinged to the hinge frame, the hinge frame is hinged to the slider, the slider is slidably connected to the knocking head, the knocking head is slidably connected to the power shell, and a buffer spring is installed between the knocking head and the slider.

6. A trench excavation support device for water conservancy and hydropower construction according to claim 4, characterized in that: The limiting nail plate includes a plate body movably connected to the clamping frame, a tip is provided at the bottom of the plate body, and two groups of L-shaped plates are fixedly connected to the top of the plate body.

7. A trench excavation support device for water conservancy and hydropower construction according to claim 6, characterized in that: A group of L-shaped plates abuts against a group of clamping frames.

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