Groove excavation supporting structure for water conservancy project

Abstract

The invention relates to the technical field of water conservancy projects, and discloses a water conservancy project trench excavation supporting structure which comprises supporting assemblies arranged in the length direction of a trench in an array mode. The supporting assembly comprises two symmetrically-arranged baffles, two supporting columns rotationally arranged on the baffles and abutting pieces capable of connecting the two opposite supporting columns together, and a locking assembly is arranged between every two adjacent baffles. The supporting assembly has a first state and a second state, and when the supporting assembly is in the first state, the abutting piece is connected with the supporting column so that the baffle can abut against the inner wall of the groove; when the supporting column is in the second state, the supporting column can rotate to be matched with the adjacent baffles so that the two adjacent baffles can be connected together, and when the supporting column is connected with the adjacent baffles, the locking assembly can be triggered to connect the adjacent baffles together. According to the method, more construction space can be provided while supporting work is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of water conservancy projects, and in particular to a trench excavation support structure for water conservancy projects. Background Art

[0002] In water conservancy projects, projects that draw water from reservoirs and set up water pipelines to transport water to required areas are usually called reservoir-supported water transfer projects or reservoir water diversion projects. Reservoir-supported water transfer projects transport water resources stored in reservoirs to required areas through the construction of water pipelines for various purposes such as irrigation, water supply, and power generation. The scale and complexity of the project depend on factors such as the reservoir's water storage capacity, water transfer distance, topography, and required water transfer volume.

[0003] The laying of water pipelines is the core part of the entire reservoir supporting water delivery project. First, excavation work is carried out to dig the trench to the predetermined depth and width. Then the cleaned pipe is placed in the trench, and the pipe connection work is carried out, and finally the soil layer is backfilled. After the trench is excavated, it is necessary to clean the bottom of the trench and cast the pipeline support pier in the trench. Therefore, in order to prevent the collapse of the soil layer on the side wall of the trench, it is necessary to set up a support structure to support the inner wall of the trench first.

[0004] The existing Chinese utility model patent document with authorization announcement number CN217232006U discloses a trench excavation support device for water conservancy projects, including relatively arranged baffles and a connecting rod and an internal threaded sleeve for connecting the two relatively arranged baffles together. By adjusting the position of the internal threaded sleeve, the baffle is pressed against the inner wall of the trench, thereby supporting the trench.

[0005] Although the above scheme can support the inner wall of the trench, during the construction of the trench, it is necessary to clean the bottom surface of the trench or cast pipe support piers. The connecting structure between the baffles can easily restrict the operation of the staff, and disassembling the corresponding baffles can easily cause collapse. Summary of the invention

[0006] In order to make the construction work more convenient for the staff, the present application provides a trench excavation support structure for water conservancy projects.

[0007] This application adopts the following technical solutions: A trench excavation support structure for a water conservancy project comprises a support assembly arranged in an array along the length direction of the trench, the support assembly comprising two symmetrically arranged baffles, two support columns rotatably arranged on the baffles, and an abutment capable of connecting two opposite support columns together, and a locking assembly is arranged between adjacent baffles; the support assembly has a first state and a second state, when in the first state, the abutment is connected to the support column so that the baffle is pressed against the inner wall of the trench; when in the second state, the support can be rotated to cooperate with the adjacent baffle to connect the two adjacent baffles together, and when the support column is connected to the adjacent baffle, the locking assembly can be triggered to connect the adjacent baffles together.

[0008] By adopting the above technical solution, the abutment connects the relative support columns together, so that the baffle is pressed against the inner wall of the groove to support the inner wall of the groove; when the support column is adjusted to the second state, the support column connects the adjacent baffles together and triggers the locking assembly to stably connect the adjacent baffles together. Therefore, the baffle has good stability and there is more space between the relative baffles for workers to construct.

[0009] Optionally, a positioning cylinder is slidably provided on the outer wall of the support column, and a positioning groove is opened on the side wall of the positioning cylinder, and the positioning groove is a constricted structure, and positioning blocks are provided at the two side edges of the baffle, and the positioning blocks are adapted to the positioning groove; when the support assembly is in a first state, the positioning cylinder can slide to the end of the support column to cooperate with the resistance member; when in the second state, the positioning cylinder is slid, and two adjacent positioning blocks can slide into the positioning grooves, and when the positioning cylinder slides to the position of the positioning block, the positioning cylinder triggers the locking assembly to connect the adjacent baffles together.

[0010] By adopting the above technical solution, the positioning tube is adjusted to the end of the support part and cooperates with the abutment member. When the two positioning blocks are clamped on the positioning tube, the baffles are not easily separated from each other, thereby supporting the baffles.

[0011] Optionally, the resistance member includes a connecting rod and an adjusting cylinder threadedly connected to both ends of the connecting rod, and a resistance ring is provided on the outer wall of the end of the adjusting cylinder; when the positioning cylinder moves to the end of the support column, the end of the adjusting cylinder can be inserted into the inner cavity of the positioning cylinder, and the resistance ring is tightly pressed against the end face of the positioning cylinder; a positioning structure is provided between the positioning cylinder and the support column, which can position the positioning cylinder to limit the sliding of the positioning cylinder.

[0012] By adopting the above technical solution, the abutment ring is pressed against the end surface of the positioning tube, so that the baffle is pressed against the inner wall of the groove.

[0013] Optionally, the positioning structure includes a limit block arranged on the inner wall of the positioning cylinder, the side wall of the support column is provided with a sliding groove for the limit block to slide, the end of the sliding groove close to the end of the support column is provided with a circumferential groove for the limit block to slide circumferentially, and the end of the circumferential groove away from the sliding groove is provided with a clamping groove, and when the contact ring is pressed against the end face of the adjusting cylinder, the limit block is pressed against the clamping groove.

[0014] By adopting the above technical solution, the limiting block abuts against the clamping groove, so that when the abutment ring abuts against the positioning tube, the positioning tube will not slip.

[0015] Optionally, the locking assembly includes a mounting seat arranged on one side of the baffle and a plug-in seat arranged on the other side of the baffle; a locking column is slidably connected to the mounting seat, and a first elastic member is installed in the mounting seat, the first elastic member is connected to the locking column, the locking column corresponds to the adjacent plug-in seat, and the plug-in seat is provided with a slot for the locking column to be plugged in; a resistance rod is also provided in the mounting seat, and when the positioning cylinder and the positioning block are connected, the locking column is driven to be plugged into the slot through the resistance rod, and at this time the first elastic member provides a force to reset the locking column.

[0016] By adopting the above technical solution, the locking column is inserted into the slot, thereby further connecting the baffles together and further improving stability.

[0017] Optionally, a mounting groove is provided in the mounting seat, the interference rod is slidably installed in the mounting groove, and a second elastic member is provided between the interference rod and the mounting seat; the side wall of the locking column is provided with an extension rod extending into the mounting groove, and an inclined surface is provided at one end of the interference rod close to the locking column, the extension rod abuts against the inclined surface, and the end of the interference rod can be pressed by the positioning cylinder and slide into the mounting groove to drive the locking column to slide.

[0018] By adopting the above technical solution, the positioning cylinder drives the resistance rod to slide, thereby driving the locking column to slide, thereby achieving the effect of the locking column being inserted into the slot.

[0019] Optionally, a accommodating cavity is provided in the support column, a plug-in column is slidably provided on the inner wall of the accommodating cavity, and a third elastic member is provided between the plug-in column and the inner wall of the accommodating cavity, and a socket is provided on the inner wall of the positioning cylinder, and when the positioning cylinder and the positioning block are connected, the plug-in column and the socket correspond to each other; a driving member is slidably provided in the accommodating cavity, and the driving member can drive the plug-in column to slide so that the plug-in column is plugged into the socket, and at this time the third elastic member is compressed.

[0020] By adopting the above technical solution, when the positioning block is clamped on the positioning tube, the driving member drives the plug-in column to be plugged into the positioning tube, thereby positioning the positioning tube and reducing the possibility of slippage.

[0021] Optionally, the driving member includes a threaded column threadedly connected to the inner wall of the accommodating cavity, the side wall of the threaded column is provided with an arc groove, the end of the plug-in column extends into the arc groove, and by rotating the threaded column, the plug-in column can be pressed by the inner wall of the arc groove and plugged into the socket.

[0022] By adopting the above technical solution, the end of the plug-in column is located in the arc groove, and the threaded column can slide and push the plug-in column to slide through the inner wall of the arc groove.

[0023] Optionally, a reinforcement strip is provided on the baffle surface, and positioning holes are provided on the baffle surface and the ends of the reinforcement strip. When the support assembly is in a first state, the threaded column can pass through the end of the support column and be inserted into the positioning hole on the baffle; when the support assembly is in a second state, the threaded column can be inserted into the positioning hole on the reinforcement strip.

[0024] By adopting the above technical solution, in the first state and the second state, the threaded column can be inserted into the corresponding positioning hole, thereby further improving the supporting effect of the support rod on the baffle.

[0025] Optionally, a first step edge is provided on a side of the baffle, and a second step edge abutting against the first step edge is provided on an adjacent baffle.

[0026] By adopting the above technical solution, the stability of adjacent baffles is further improved, making it less likely for the baffles to slip horizontally.

[0027] In summary, the present application includes at least one of the following beneficial effects: 1. The support assembly has a first state and a second state. In the first state, the two opposing baffles are pressed against the inner wall of the groove. In the second state, the baffle is connected to the adjacent baffle, so that the construction between the two opposing baffles can be more convenient. 2. Under the action of the locking assembly, the stability of the connection between adjacent baffles is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of an embodiment of the present application; Figure 2 is a schematic diagram of a support assembly in an embodiment of the present application; Figure 3 is an exploded schematic diagram of a support column in an embodiment of the present application; Figure 4is a schematic diagram of the positioning cylinder in the first state in the embodiment of the present application; Figure 5 is an exploded schematic diagram of the positioning cylinder in an embodiment of the present application; Figure 6 is a schematic diagram of a locking assembly in an embodiment of the present application; Figure 7 yes Figure 6 The enlarged schematic diagram of point A in the middle; Figure 8 is a schematic cross-sectional view of a support column; Fig. 9 yes Figure 8 A magnified schematic diagram of point B in the middle.

[0029] Description of the reference numerals: 1. positioning cylinder; 2. positioning groove; 3. support assembly; 31. baffle; 32. support column; 33. resistance member; 331. connecting rod; 332. adjustment cylinder; 333. resistance ring; 4. locking assembly; 41. mounting seat; 42. plug-in seat; 43. locking column; 44. first elastic member; 5. positioning block; 6. positioning structure; 61. limit block; 8. sliding groove; 9. circumferential groove; 1 0. Card-connecting groove; 11. Slot; 12. Resistance rod; 13. Installation groove; 14. Installation space; 15. Second elastic member; 16. Extension rod; 17. Inclined surface; 18. Accommodating cavity; 19. Plug-in column; 20. Third elastic member; 21. Plug hole; 22. Driving member; 221. Threaded column; 24. Arc groove; 25. Reinforcement strip; 26. Positioning hole; 27. First step edge; 28. Second step edge. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-9 This application is described in further detail.

[0031] The present application embodiment discloses a trench excavation support structure for water conservancy projects, referring to Figure 1 The support structure includes support components 3 arranged in an array along the length direction of the trench. In trench excavation, the bottom width of the trench excavation in the soil foundation section is 1.0m on both sides of the pipeline outer diameter, and the foundation is cleared within 500mm below the original ground line.

[0032] After trench excavation, support assembly 3 is used for support to reduce the possibility of sidewall collapse. A 200mm thick crushed stone cushion is used for the pipeline foundation. The backfill within the angle range is made of crushed stone, gravel or original soil, with a minimum relative density of Dr 0.75. The backfill on the pipe side is made of crushed stone, gravel or excavated material. The compaction degree of cohesive soil shall not be less than 95%, and the minimum relative density of non-cohesive soil shall be Dr 0.75. The backfill on the top of the pipe (500mm above the top of the pipe) is made of crushed stone, gravel or excavated material, and is filled to 500mm above the top of the pipe. The backfill material shall not contain organic matter, frozen soil, bricks, stones and other hard blocks larger than 50mm. The compaction degree of cohesive soil shall not be less than 90%, and the minimum relative density of non-cohesive soil shall be Dr 0.7. The backfill above the top of the pipe is made of crushed stone, gravel or excavated material, and the maximum particle size of the backfill material is 100mm. During winter backfilling, frozen soil can be evenly mixed in the area 1000mm above the pipe top, and the amount shall not exceed 15% of the total volume of the backfill, and the size of the frozen block shall not exceed 100mm. The compaction degree of cohesive soil shall not be less than 90%, and the minimum relative density of non-cohesive soil is Dr0.70. If the pipeline is located in farmland or green land, the settlement height range of 250mm below the original ground to 180mm above the original ground shall be restored according to the cultivated layer.

[0033] Reference Figure 2 and Figure 3 Each support assembly 3 includes two baffles 31 arranged opposite to each other, two support columns 32 rotatably connected to the baffles 31, and a resisting member 33 connecting the two opposite support columns 32 together. The resisting member 33 cooperates with the support column 32 so that the two opposite baffles 31 are pressed against the inner wall of the groove, thereby supporting the inner wall of the groove. The support column 32 is rotatably connected to the baffle 31 by means of a pin shaft, and the rotation point is vertically arranged. The support assembly 3 has a first state and a second state. When in the first state, the support column 32 cooperates with the resisting member 33 so that the baffle 31 supports the inner wall of the groove. When in the second state, the support column 32 can rotate to connect with the adjacent baffle 31, so that the baffle 31 can also be positioned. When construction needs to be carried out at a certain position, such as cleaning the bottom surface, setting a support pier, etc. The first state is changed to the second state, so that it is not easily affected by the support column 32 during operation.

[0034] The outer wall of the support column 32 is slidably provided with a positioning cylinder 1. In the first state, the positioning cylinder 1 can be used to cooperate with the abutment 33; in the second state, the positioning cylinder 1 can connect the adjacent baffles 31 together. The abutment 33 includes a connecting rod 331 and an adjustment cylinder 332 threadedly connected to both ends of the connecting rod 331. The outer wall of the adjustment cylinder 332 is coaxially fixed with a abutment ring 333. Figure 4 and Figure 5A positioning structure 6 is provided between the positioning cylinder 1 and the support column 32. When the positioning cylinder 1 slides to partially exceed the end of the support column 32, the adjustment cylinder 332 can be inserted into the positioning cylinder 1, and the abutment ring 333 can be pressed against the end face of the positioning cylinder 1. Under the action of the positioning structure 6, the positioning cylinder 1 can no longer slide, so that the baffle 31 can be pressed against the inner wall of the groove.

[0035] The positioning structure 6 includes a limit block 61 symmetrically fixed to the inner wall of the positioning cylinder 1, and the outer wall of the support column 32 is provided with a sliding groove 8 for the limit block 61 to slide. The end of the sliding groove 8 close to the end of the support column 32 is provided with a circumferential groove 9 for the limit block 61 to slide circumferentially. The end of the circumferential groove 9 away from the sliding groove 8 is provided with a clamping groove 10, and the clamping groove 10 extends in a direction away from the abutment 33. When the abutment ring 333 is pressed against the end surface of the positioning cylinder 1, the limit block 61 can be pressed against the clamping groove 10.

[0036] Reference Figure 3 and Figure 5 The outer wall of the positioning tube 1 is provided with a positioning groove 2, and the positioning groove 2 is a constricted structure. In this embodiment, the cross-section of the positioning groove 2 is a dovetail groove structure. Positioning blocks 5 are fixed near the edge of the surface of the baffle 31, and adjacent positioning blocks 5 can abut against each other. The shape of the positioning block 5 is compatible with the positioning groove 2. When adjusted to the second state, when the support column 32 is rotated to be flush with the surface of the baffle 31, the positioning tube 1 is slid again, so that the two adjacent positioning blocks 5 can be inserted into the positioning groove 2, thereby connecting the adjacent baffles 31 together.

[0037] A locking assembly 4 is also installed on the baffle 31, and the locking assembly 4 is distributed on the upper and lower sides of the positioning block 5. When the positioning cylinder 1 is in the second state and the positioning block 5 and the positioning cylinder 1 cooperate, the locking assembly 4 can be driven to connect the adjacent baffles 31 together, further improving the stability of the baffles 31 connected together.

[0038] Reference Figure 6 and Figure 7The locking assembly 4 includes a mounting seat 41 fixed to one side of the baffle 31 close to the edge, and a plug-in seat 42 arranged on the other side. When adjacent baffles 31 are abutted together, the mounting seat 41 can correspond to the plug-in seat 42 on the adjacent baffle 31. A locking column 43 is slidably connected in the mounting seat 41, and a first elastic member 44 is installed in the mounting seat 41, and the first elastic member 44 is connected to one end of the locking column 43 away from the plug-in seat 42. An installation space 14 is provided on the mounting seat 41 to accommodate the installation position of the locking column 43 and the first elastic member 44. A slot 11 is provided on the plug-in seat 42, and a resisting rod 12 is also installed on the mounting seat 41. The resisting rod 12 can be pressed by the positioning cylinder 1 to slide, and drive the locking column 43 to slide, so that the locking column 43 is plugged into the slot 11 on the adjacent plug-in seat 42. The first elastic member 44 is a spring, one end of which is connected to the inner wall of the installation space 14 and the other end is connected to the end of the locking column 43 . When the locking column 43 is inserted into the socket 42 , it is in a stretched state.

[0039] The mounting seat 41 is provided with a mounting groove 13, in which the abutting rod 12 is slidably mounted, and the mounting groove 13 is connected to the mounting space 14 of the locking column 43. A second elastic member 15 is provided between the mounting seat 41 and the abutting rod 12. The second elastic member 15 is a spring and is sleeved on the outer wall of the abutting rod 12, one end of which abuts against the end face of the mounting seat 41, and the other end is connected to the outer wall of the abutting rod 12. An extension rod 16 is fixed to the outer wall of the locking column 43, and one end of the extension rod 16 extends into the mounting groove 13. An inclined surface 17 is provided at one end of the abutting rod 12 close to the locking column 43, and the extension rod 16 abuts against the inclined surface 17. When the positioning cylinder 1 slides to match with the positioning block 5, the end of the abutting rod 12 is pressed by the positioning cylinder 1 and slides into the mounting seat 41, thereby driving the extension rod 16 to move to drive the locking column 43 to move, and at this time the second elastic member 15 is compressed.

[0040] In a further embodiment, referring to Figure 5 and Figure 8 In order to reduce the slippage of the positioning cylinder 1 after the positioning cylinder 1 and the positioning block 5 are matched, a plug-in column 19 for positioning the positioning cylinder 1 is installed on the support column 32. The plug-in column 19 is slidably installed on the side wall of the support column 32. The support column 32 is provided with a hole groove for installing the plug-in column 19. The support column 32 is provided with a receiving cavity 18, and the receiving cavity 18 passes through both ends of the support column 32. The plug-in column 19 is slidably installed on the inner wall of the receiving cavity 18. Fig. 9 A third elastic member 20 is provided between the plug-in column 19 and the inner wall of the accommodating chamber 18. The third elastic member 20 is a spring connected between the inner wall of the accommodating chamber 18 and the plug-in column 19. A driving member 22 is slidably provided in the accommodating chamber 18. Figure 5The inner wall of the positioning cylinder 1 is provided with a socket 21 for the plug-in column 19 to be plugged in. When the positioning cylinder 1 and the positioning block 5 are connected, the driving member 22 drives the plug-in column 19 to slide and be plugged into the socket 21. At this time, the third elastic member 20 is compressed, and the positioning cylinder 1 cannot slide under the action of the plug-in column 19.

[0041] Reference Figure 8 The driving member 22 includes a threaded column 221 that is threadedly connected to the inner wall of the accommodating chamber 18. The outer wall of one end of the threaded column 221 is threadedly connected to the inner wall of the accommodating chamber 18. An inner hexagon is provided on one end face of the threaded column 221 near the end of the support column 32, which is convenient for the staff to use tools to rotate. The outer wall of the threaded column 221 is provided with an arc groove 24, and the arc groove 24 extends around in the circumferential direction. The end of the plug-in column 19 is located in the arc groove. When the threaded column 221 moves forward in the accommodating chamber 18, the end of the plug-in column 19 is pressed by the inner wall of the arc groove 24 and slides, thereby being plugged into the socket 21.

[0042] Reference Figure 6 and Figure 7 , a reinforcing strip 25 is fixed horizontally on the surface of the baffle 31. The reinforcing strip 25 is a long strip structure and is located between the two support columns 32 on the baffle 31. Positioning holes 26 are provided on the surface of the baffle 31 and the end faces of the reinforcing strip 25. When the support assembly 3 is adjusted to the first state, the threaded column 221 is rotated so that one end of the threaded column 221 passes through the end face of the support column 32 and is inserted into the positioning hole 26 on the surface of the baffle 31. At this time, combined with Figure 4 One end of the plug-in column 19 has a portion extending beyond the surface of the support column 32, and the side wall of the plug-in column 19 abuts against the end surface of the positioning tube 1, thereby further improving the stability of the positioning tube 1. When the support assembly 3 is adjusted to the second state, the threaded column 221 is rotated so that one end of the threaded column 221 is inserted into the positioning hole 26 on the reinforcement strip 25, thereby connecting the support column 32 and the reinforcement strip 25 together, thereby improving the stability of the baffle 31.

[0043] Furthermore, first step edges 27 are provided on both side walls of the baffle 31, and second step edges 28 are provided on both sides of adjacent baffles 31. When the baffles 31 abut against each other, the first step edges 27 and the second step edges 28 can abut against each other, and the stability of the baffles 31 connected together is further improved under the action of the first step edges 27 and the second step edges 28.

[0044] The implementation principle of a trench excavation support structure for a water conservancy project in an embodiment of the present application is: the support assembly 3 is adjusted to a first state so that the baffle 31 is pressed against the inner wall of the trench to support the trench; when some construction work needs to be carried out in the trench, the support column 32 at the corresponding position is adjusted to a second state so that the support column 32 at this position does not affect the convenience of construction, and the positioning tube 1 connects the baffle 31 and the adjacent baffle 31 together, so that the baffle 31 can maintain the support effect on the inner wall of the trench.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A trench excavation support structure for water conservancy projects, characterized in that: The invention comprises a support assembly (3) arranged in an array along the length direction of a groove, wherein the support assembly (3) comprises two symmetrically arranged baffles (31), two support columns (32) rotatably arranged on the baffles (31), and a resisting member (33) capable of connecting two opposite support columns (32) together, and a locking assembly (4) is arranged between adjacent baffles (31); the support assembly (3) has a first state and a second state, and when in the first state, the resisting member (33) is connected to the support column (32) so that the baffle (31) is pressed against the inner wall of the groove; when in the second state, the support can be rotated to cooperate with the adjacent baffle (31) so as to connect the two adjacent baffles (31) together, and when the support column (32) is connected to the adjacent baffle (31), the locking assembly (4) can be triggered to connect the adjacent baffles (31) together.

2. A trench excavation support structure for water conservancy projects according to claim 1, characterized in that: A positioning cylinder (1) is slidably provided on the outer wall of the support column (32), and a positioning groove (2) is provided on the side wall of the positioning cylinder (1). The positioning groove (2) is in a constricted structure. Positioning blocks (5) are provided at both side edges of the baffle (31), and the positioning blocks (5) are matched with the positioning groove (2). When the support assembly (3) is in a first state, the positioning cylinder (1) can slide to the end of the support column (32) to match with the abutment (33). When in a second state, the positioning cylinder (1) is slid, and two adjacent positioning blocks (5) can slide into the positioning groove (2), and when the positioning cylinder (1) slides to the position of the positioning block (5), the positioning cylinder (1) triggers the locking assembly (4) to connect adjacent baffles (31) together.

3. A trench excavation support structure for water conservancy projects according to claim 2, characterized in that: The abutment member (33) comprises a connecting rod (331) and an adjusting cylinder (332) threadedly connected to both ends of the connecting rod (331); an abutment ring (333) is provided on the outer wall of the end of the adjusting cylinder (332); when the positioning cylinder (1) moves to the end of the support column (32), the end of the adjusting cylinder (332) can be inserted into the inner cavity of the positioning cylinder (1), and the abutment ring (333) is pressed against the end surface of the positioning cylinder (1); a positioning structure (6) is provided between the positioning cylinder (1) and the support column (32), which can position the positioning cylinder (1) to limit the sliding of the positioning cylinder (1).

4. A trench excavation support structure for water conservancy projects according to claim 3, characterized in that: The positioning structure (6) comprises a limit block (61) arranged on the inner wall of the positioning cylinder (1); a sliding groove (8) for sliding the limit block (61) is provided on the side wall of the support column (32); a circumferential groove (9) for circumferential sliding of the limit block (61) is provided at one end of the sliding groove (8) close to the end of the support column (32); a clamping groove (10) is provided at one end of the circumferential groove (9) away from the sliding groove (8); when the abutment ring (333) is pressed against the end surface of the adjustment cylinder (332), the limit block (61) is pressed against the clamping groove (10).

5. A trench excavation support structure for water conservancy projects according to claim 4, characterized in that: The locking assembly (4) comprises a mounting seat (41) arranged on one side of the baffle (31) and a plug-in seat (42) arranged on the other side of the baffle (31); a locking column (43) is slidably connected to the mounting seat (41), and a first elastic member (44) is installed in the mounting seat (41), the first elastic member (44) and the locking column (43) are connected, the locking column (43) and the adjacent plug-in seat (42) correspond, and the plug-in seat (42) is provided with a slot (11) for the locking column (43) to be plugged in; a resisting rod (12) is also provided in the mounting seat (41), when the positioning cylinder (1) and the positioning block (5) are connected, the locking column (43) is driven to be plugged into the slot (11) by the resisting rod (12), and at this time, the first elastic member (44) provides a force for resetting the locking column (43).

6. A trench excavation support structure for water conservancy projects according to claim 5, characterized in that: The mounting seat (41) is provided with a mounting groove (13), the abutting rod (12) is slidably mounted in the mounting groove (13), and a second elastic member (15) is provided between the abutting rod (12) and the mounting seat (41); the side wall of the locking column (43) is provided with an extension rod (16) extending into the mounting groove (13), and an inclined surface (17) is provided at one end of the abutting rod (12) close to the locking column (43), and the extension rod (16) abuts against the inclined surface (17), and the end of the abutting rod (12) can be pressed by the positioning cylinder (1) to slide into the mounting groove (13) to drive the locking column (43) to slide.

7. A trench excavation support structure for water conservancy projects according to claim 5, characterized in that: The support column (32) is provided with a receiving cavity (18), the inner wall of the receiving cavity (18) is slidably provided with a plug-in column (19), and a third elastic member (20) is provided between the plug-in column (19) and the inner wall of the receiving cavity (18); the inner wall of the positioning cylinder (1) is provided with a plug-in hole (21), and when the positioning cylinder (1) and the positioning block (5) are connected, the plug-in column (19) and the plug-in hole (21) correspond to each other; a driving member (22) is slidably provided in the receiving cavity (18), and the driving member (22) can drive the plug-in column (19) to slide so that the plug-in column (19) is plugged into the plug-in hole (21), and at this time, the third elastic member (20) is compressed.

8. A trench excavation support structure for water conservancy projects according to claim 7, characterized in that: The driving member (22) comprises a threaded column (221) threadedly connected to the inner wall of the accommodating chamber (18); a side wall of the threaded column (221) is provided with an arc-shaped groove (24); an end of the plug-in column (19) extends into the arc-shaped groove (24); when the threaded column (221) is rotated, the plug-in column (19) can be pressed against the inner wall of the arc-shaped groove (24) and plugged into the insertion hole (21).

9. A trench excavation support structure for water conservancy projects according to claim 8, characterized in that: A reinforcing strip (25) is provided on the surface of the baffle (31), and positioning holes (26) are provided on the surface of the baffle (31) and on the end of the reinforcing strip (25); when the support assembly (3) is in a first state, the threaded column (221) can pass through the end of the support column (32) and be inserted into the positioning hole (26) on the baffle (31); when the support assembly (3) is in a second state, the threaded column (221) can be inserted into the positioning hole (26) on the reinforcing strip (25).

10. A trench excavation support structure for water conservancy projects according to claim 9, characterized in that: A first step edge (27) is provided on the side of the baffle plate (31), and a second step edge (28) abutting against the first step edge (27) is provided on the adjacent baffle plate (31).

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