Groove excavation supporting device for hydraulic engineering construction

Abstract

The invention relates to the technical field of water conservancy projects, and discloses a groove excavation supporting device for water conservancy project construction, which comprises a left supporting plate and a right supporting plate which are symmetrically arranged, and further comprises a pressure-bearing rod assembly for connecting the left supporting plate and the right supporting plate, and the pressure-bearing rod assembly comprises a group of pressure-bearing screw rods which are symmetrically arranged and are opposite in spiral direction; the supporting device further comprises an adjusting sleeve matched with the pressure-bearing screw in a spiral mode, a telescopic rod assembly is further arranged between the opposite faces of the left supporting plate and the right supporting plate, and a pipeline centering assembly is arranged at the end, away from the left supporting plate or the right supporting plate, of the telescopic rod assembly. And meanwhile, traditional mechanical transmission is adopted as power, and dependence on electric power and hydraulic pressure is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy projects, and particularly to a trench excavation support device for water conservancy project construction. Background Art

[0002] Water conservancy projects are an important part of China's infrastructure construction. Pipe water conveyance is an important water conservancy supply method. With the development of society and the acceleration of urbanization, the requirements for water conservancy conveyance are getting higher and higher. The quality of pipes directly affects the living quality of urban residents. During the construction of widening urban water conservancy pipes or excavating trenches for new pipelines, it is necessary to support the trenches of the pipes.

[0003] An existing trench excavation support device for water conservancy project construction in application CN118727777B includes two mounting blocks. Symmetrically distributed support mechanisms are fixedly connected to the outer walls on both sides of each two mounting blocks. Auxiliary docking mechanisms are arranged on the outer walls of two of the support cylinders. Through the docking mechanism of the present invention, the centers of two pipes to be connected can be quickly aligned, facilitating subsequent connection. Through the pipe bottom backfilling mechanism, the two utility plates are turned and deformed, enabling automatic bottom backfilling of the previous section of the pipe during the movement of the device, which is very convenient and efficient, avoiding problems such as gaps existing at the bottom of the pipe body and incomplete backfilling when workers backfill soil above the trench, resulting in subsequent land subsidence; however, this application also has problems such as complex structure, dependence on power sources, poor environmental adaptability, and relatively large mass of individual structural components. Especially in mountainous areas, due to the steep terrain, large equipment cannot enter, and in areas where the mountain soil is relatively loose, problems such as landslides, sinking and tilting of the support structure, secondary settlement of backfill soil, failure of the centering module, and difficulty in moving the equipment are likely to occur. Summary of the Invention

[0004] The purpose of the present invention is to provide a trench excavation support device for water conservancy project construction, which adopts a modular design for the support device, greatly reduces the weight of individual components, facilitates the transportation and installation of components during mountain operations, and uses traditional mechanical transmission as the power source to reduce the dependence on electricity and hydraulics, so as to solve the problems raised in the above background art.

[0005] To achieve the above objectives, a trench excavation support device for water conservancy project construction is provided, including a left support plate and a right support plate arranged symmetrically, and further including a pressure-bearing rod assembly connecting the left support plate and the right support plate. The pressure-bearing rod assembly includes a group of symmetrically arranged pressure-bearing screw rods with opposite spiral directions, and further includes an adjustment sleeve spirally engaged with the pressure-bearing screw rods. An expansion rod assembly is also provided between the opposite surfaces of the left support plate and the right support plate, and a pipe centering assembly is provided at the end of the expansion rod assembly away from the left support plate or the right support plate.

[0006] Further, on the opposite side end faces of the left support plate and the right support plate, there are limit grooves extending from the top to the bottom of the left support plate or the right support plate. The horizontal cross-section of the limit groove is in a concave shape. Pin shafts holes for cooperating with the telescopic rod assembly and the pressure-bearing screw are provided at different heights along the front-back direction in the limit groove. Anchor rod holes are provided along the plumb direction in the limit groove. Anchor rods are provided in the anchor rod holes of the limit groove, and a manual rotor is cooperated with the pin shaft on the outer side of the anchor rod.

[0007] Further, the left support plate successively includes a water-permeable plate made of polymer material, a porous stainless steel plate, a buffer pad, a drainage cavity, a waterproof layer, and an aluminum alloy pressure-bearing plate from left to right. A plurality of support columns are provided in the drainage cavity. A sealing plate is provided at one end of the drainage cavity, and a socket sleeve is provided at the other end of the drainage cavity.

[0008] Further, the pressure-bearing screw includes a threaded rod. The threaded rod uses trapezoidal threads. A fixing seat for cooperating with the pin shaft hole is provided at the end of the threaded rod away from the adjusting sleeve. The inner side wall surface of the adjusting sleeve is respectively provided with threads with opposite spiral directions from the middle to both ends.

[0009] Further, the telescopic rod assembly includes a telescopic rod. The telescopic rod includes a coaxially arranged driving rotating cylinder, a driven threaded rod, a first driven rotating cylinder, a second driven rotating cylinder, and a third driven rotating cylinder. The driving rotating cylinder is hollow. The driven threaded rod is arranged in the hollow cavity of the driving rotating cylinder. The driving rotating cylinder is in threaded cooperation with both the driven threaded rod and the first driven rotating cylinder. The first driven rotating cylinder and the second driven rotating cylinder are in threaded cooperation. The second driven rotating cylinder and the third driven rotating cylinder are in threaded cooperation.

[0010] Further, the telescopic rod assembly further includes a power assembly. The power assembly includes a turbine. The turbine is arranged on the outer side of the end of the driving rotating cylinder away from the driven threaded rod. A turbine housing is sleeved outside the turbine. It also includes a worm rod cooperating with the turbine. A worm rod housing is sleeved outside the worm rod. A crank is pin-fixed at one end of the worm rod. It also includes a pressure-bearing pad in rotational cooperation with the driving rotating cylinder.

[0011] Further, a telescopic runner is provided on the outer side of the end of the driving rotating cylinder away from the driven threaded rod. It also includes a flange in rotational cooperation with the driving rotating cylinder.

[0012] Further, the pipeline centering assembly includes a set of symmetrically arranged pipeline positioning plates. The pipeline positioning plates include an arc section and a straight section. A pressure-bearing screw sleeve is provided at the top of the pipeline positioning plates. The pressure-bearing screw sleeve includes a set of symmetrically arranged and screwed-fixed arc-shaped limiting plates. The arc-shaped limiting plates are hinged to the pipeline positioning plates. An expansion rod limiting groove for cooperating with the expansion rod is provided at the end of the pipeline positioning plate close to the left support plate or the right support plate.

[0013] Furthermore, a backing plate is provided on the outer side of the threaded rod. The cross-section of the backing plate is in the shape of a semi-circular fan. The backing plate is arranged between the opposite surfaces of the pressure-bearing screw sleeve and the adjusting sleeve. A socket gasket is provided at the end of the pressure-bearing screw sleeve away from the backing plate. The socket gasket is composed of a group of symmetrically arranged left and right pressure-bearing sleeves. A pressure-bearing gasket socket sleeve is provided at the bottom end of the socket gasket.

[0014] Furthermore, the socket gasket includes pressure-bearing gasket threaded rod sleeves that are symmetric left and right. A threaded rod hole that mates with the threaded rod is provided along the length direction of the pressure-bearing gasket threaded rod sleeve. An insertion sleeve ring is integrally connected to the lower end of the pressure-bearing gasket threaded rod sleeve. A screw connection plate is provided at the upper end of the pressure-bearing gasket threaded rod sleeve. A screw hole that penetrates itself is provided on the screw connection plate. It also includes an upper fixing bolt that mates with the screw hole. A lower fixing bolt is provided on the outer side of the pressure-bearing gasket threaded rod sleeve.

[0015] The present invention has the following beneficial effects on the prior art: 1. By adopting a modular design for the support device in the present invention, the maximum weight of a single component is 80 - 100 kg, which can be transported by multiple people working together, small machinery, or livestock, and is especially suitable for mountainous areas. Most components are fixed by pins or bolts, and the installation is simple during mountain construction, greatly improving the efficiency of pre-construction preparation.

[0016] 2. By adopting a hollow design for the left support plate and the right support plate in the present invention, a permeable plate made of porous stainless steel is used on the side where the left support plate and the right support plate contact the soil, allowing water to enter the drainage cavity. The waterproof layer prevents water from penetrating into the trench, and the drainage cavities of adjacent support plates are connected by socket connection, which can effectively collect and discharge seepage water, ensuring a stable construction environment. At the same time, the support columns in the drainage cavity ensure the pressure-bearing capacity of the support plates.

[0017] 3. Through the pipe positioning plate of the pipe centering component in the present invention, in cooperation with the suspension rod, pulley assembly, and adjustable telescopic rod assembly, the position of the pipe can be accurately fixed, preventing the pipe from deviating during the installation process, ensuring the accurate pre-buried position of the pipe, and improving the construction quality of pipe installation.

[0018] 4. In the present invention, the cooperation of the manual rotating wheel, turbine, and worm provides power for the anchor rod and the telescopic rod assembly, which is suitable as a power source for special working conditions such as narrow trenches in mountainous areas, greatly reducing the dependence on external power such as hydraulic pressure and electricity, and enhancing the applicability of the support device under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an isometric view of the excavation support device of the present invention; Figure 2 is an isometric view of the left support plate of the present invention; Figure 3 is for the present invention Figure 2 A - A isometric view; Figure 4 Isometric view of the telescopic rod assembly of the present invention; Figure 5 For the present invention Figure 4 Isometric view of B-B of the present invention; Figure 6 Exploded view of the telescopic rod of the present invention; Figure 7 Schematic diagram of another implementation mode of the telescopic rod of the present invention; Figure 8 Isometric view of the pipe centering assembly of the present invention; Figure 9 Isometric view of the pressure-bearing screw of the present invention; Figure 10 Isometric view of the socket gasket of the present invention; Figure 11 For the present invention Figure 10 Partial enlarged schematic view of part A of the present invention.

[0020] In the figure: 1, left support plate; 101, porous stainless steel plate; 102, buffer pad; 103, sealing plate; 104, waterproof layer; 105, bearing plate; 107, drainage cavity; 108, permeable plate; 109, support column; 110, socket sleeve; 2, pressure-bearing screw; 201, threaded rod; 202, fixed seat; 3, adjusting sleeve; 4, telescopic rod assembly; 401, power assembly; 402, crank; 403, telescopic rod; 404, turbine housing; 405, bearing pad; 406, worm housing; 407, worm; 408, turbine; 409, active rotating cylinder; 410, driven threaded rod; 411, third driven rotating cylinder; 412, second driven rotating cylinder; 413, first driven rotating cylinder; 414, telescopic runner; 415, flange; 5, limit groove; 6, right support plate; 7, manual rotating wheel; 8, anchor rod; 9, pipe centering assembly; 901, pipe positioning plate; 902, pressure-bearing screw sleeve; 903, telescopic rod limit groove; 904, socket gasket; 905, backing plate; 906, bearing pad socket sleeve; 907, bearing pad threaded rod sleeve; 908, socket ring; 909, screwed plate; 910, upper fixing bolt; 911, threaded rod hole; 912, lower fixing bolt. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] In one implementation mode, as Figures 1-11A trench excavation support device for water conservancy project construction shown in the figure includes symmetrically arranged left support plate 1 and right support plate 6, and also includes a pressure-bearing rod assembly connecting the left support plate 1 and the right support plate 6. The pressure-bearing rod assembly includes a group of symmetrically arranged pressure-bearing screws 2 with opposite spiral directions, and also includes an adjusting sleeve 3 that is in spiral fit with the pressure-bearing screw 2. An expansion rod assembly 4 is also provided between the opposite surfaces of the left support plate 1 and the right support plate 6, and a pipe centering assembly 9 is provided at the end of the expansion rod assembly 4 away from the left support plate 1 or the right support plate 6.

[0023] Limiting grooves 5 extending from the top to the bottom of the left support plate 1 or the right support plate 6 are provided on the opposite side end faces of the left support plate 1 and the right support plate 6. The horizontal cross-section of the limiting groove 5 is in a "concave" shape. Pin holes for cooperating with the expansion rod assembly 4 and the pressure-bearing screw 2 are provided at different heights along the front-back direction in the limiting groove 5. Anchor holes are provided along the vertical direction in the limiting groove 5. An anchor rod 8 is provided in the anchor hole of the limiting groove 5, and a manual rotating wheel 7 is pin-connected on the outer side of the anchor rod 8.

[0024] In this embodiment, the support device adopts a modular design, that is, the left support plate 1, the right support plate 6, the pressure-bearing screw 2, the pipe centering assembly 9, the expansion rod assembly 4 and the pressure-bearing screw 2 can be disassembled. The maximum weight of a single component is 80 - 100 kg, and it can be transported through the cooperation of multiple people, small machinery or livestock, so as to facilitate the transportation of the support device in mountainous areas. Then, most of the components of the support device are fixed by pins or bolts, so as to facilitate installation and operation during construction in mountainous areas; During installation, measure the width of the trench, then adjust the length of the pressure-bearing screw 2 through the adjusting sleeve 3, then fix the pipe centering assembly 9 to the pressure-bearing screw 2, then connect and fix the left support plate 1 and the right support plate 6 through the pressure-bearing screw 2, then place the left support plate 1 and the right support plate 6 into the excavated trench, then pass the anchor rod 8 through the left support plate 1 and the right support plate 6 and screw it into the ground through the manual rotating wheel 7. The depth of the anchor rod 8 is not less than 3 m, so as to realize the fixation of the left support plate 1 and the right support plate 6 to the ground, thus avoiding the problem that the left support plate 1 and the right support plate 6 are prone to displacement when the trench ground is soft soil, and realizing the position fixation of the left support plate 1 and the right support plate 6 in soft soil areas. Then, fix the left support plate 1 and the right support plate 6 to the pipe centering assembly 9 through the expansion rod assembly 4; through finite element analysis (FEA) simulation calculation, the ultimate tensile resistance of a single pressure-bearing screw 2 is 82 KN, and the anti-pulling capacity of the anchor rod 8 is 20 KN.

[0025] In one embodiment, as Figures 2-3As shown, the left support plate 1 from left to right is successively a water-permeable plate 108 made of polymer material, a porous stainless steel plate 101, a buffer pad 102, a drainage cavity 107, a waterproof layer 104, and an aluminum alloy bearing plate 105. A plurality of support columns 109 are provided in the drainage cavity 107. A sealing plate 103 is provided at one end of the drainage cavity 107, and a socket 110 is provided at the other end of the drainage cavity 107.

[0026] In this embodiment, the left support plate 1 and the right support plate 6 have the same structure. To solve the problem that when the soil outside the trench has a high water content and is prone to seepage into the trench, drainage cavities 107 are provided in the middle of the left support plate 1 and the right support plate 6. Then, since the outermost sides of both the left support plate 1 and the right support plate 6 are water-permeable plates 108, the water in the soil outside the trench moves to the water-permeable plates 108 on the outermost sides of the left support plate 1 and the right support plate 6 under the action of external pressure. After the water permeates through the water-permeable plate 108, it is filtered again by the porous stainless steel plate 101 and then enters the drainage cavity 107. At the same time, waterproof layers 104 are provided on the sides of the drainage cavity 107 that are not the porous stainless steel plate 101, so that the water bodies that penetrate into the left support plate 1 and the right support plate 6 will no longer seep towards the trench direction and can only move along the drainage cavity 107. The adjacent left support plates 1 in the front and back are connected in a socket-and-spigot manner, so that the water in the drainage cavity 107 is discharged towards the low-lying area under the action of gravity. Then, a plurality of support columns 109 for bearing pressure are also provided in the drainage cavity 107, so that the left support plate 1 and the right support plate 6 collect and discharge the seepage water in the soil towards the trench while providing lateral support; through finite element analysis (FEA) simulation calculation, at 20 degrees Celsius, the simulation condition is sandy soil layer, and the lateral soil pressure is 30 KPa, the compressive strength of the aluminum alloy bearing plate 105 is 285 MPa, the compressive strength of the porous stainless steel plate 101 (porosity is 30%-40%) is 235 MPa, the overall deformation of the support plate is 3.2 mm (30 KN / m2), the drainage efficiency of the drainage cavity 107 is 9 L / min, and the water permeability of the water-permeable plate 108 is 3.0×10-2 cm / s.

[0027] In one embodiment, as Figures 3-6 shown in FIGS. 8-11, the bearing screw 2 includes a threaded rod 201. The threaded rod 201 uses trapezoidal threads. A fixing seat 202 for cooperating with the pin hole is provided at the end of the threaded rod 201 away from the adjusting sleeve 3. The inner side wall surface of the adjusting sleeve 3 is provided with threads with opposite spiral directions from the middle to both ends.

[0028] The telescopic rod assembly 4 includes a telescopic rod 403, and the telescopic rod 403 includes a driving rotating cylinder 409, a driven threaded rod 410, a first driven rotating cylinder 413, a second driven rotating cylinder 412, and a third driven rotating cylinder 411 that are coaxially arranged. The driving rotating cylinder 409 is hollow, and the driven threaded rod 410 is arranged in the hollow cavity of the driving rotating cylinder 409. The driving rotating cylinder 409 is in threaded fit with both the driven threaded rod 410 and the first driven rotating cylinder 413. The first driven rotating cylinder 413 is in threaded fit with the second driven rotating cylinder 412, and the second driven rotating cylinder 412 is in threaded fit with the third driven rotating cylinder 411.

[0029] The telescopic rod assembly 4 further includes a power assembly 401. The power assembly 401 includes a turbine 408. The turbine 408 is arranged on the outer side of the end of the driving rotating cylinder 409 away from the driven threaded rod 410. A turbine housing 404 is sleeved outside the turbine 408. It also includes a worm 407 that cooperates with the turbine 408. A worm housing 406 is sleeved outside the worm 407. A crank 402 is pin-fixed at one end of the worm 407. It also includes a bearing pad 405 that is rotationally matched with the driving rotating cylinder 409.

[0030] The pipe centering assembly 9 includes a set of symmetrically arranged pipe positioning plates 901. The pipe positioning plates 901 include an arc section and a straight plate section. A bearing screw sleeve 902 is arranged at the top of the pipe positioning plate 901. The bearing screw sleeve 902 includes a set of symmetrically arranged and screwed arc-shaped limiting plates that are hinged to the pipe positioning plate 901. An expansion rod limiting groove 903 that cooperates with the telescopic rod assembly 4 is arranged at the end of the pipe positioning plate 901 close to the left support plate 1 or the right support plate 6.

[0031] A backing plate 905 is arranged outside the threaded rod 201. The cross-section of the backing plate 905 is in a semi-circular fan shape. The backing plate 905 is arranged between the opposite surfaces of the bearing screw sleeve 902 and the adjusting sleeve 3. A socket pad 904 is arranged at the end of the bearing screw sleeve 902 away from the backing plate 905. A bearing pad socket sleeve 906 is arranged at the bottom end of the socket pad 904.

[0032] The socket pad 904 includes symmetrically arranged bearing pad threaded rod sleeves 907 on the left and right. A threaded rod hole 911 that cooperates with the threaded rod 201 is opened along the length direction of the bearing pad threaded rod sleeve 907. A socket ring 908 is integrally connected to the lower end of the bearing pad threaded rod sleeve 907. A screwing plate 909 is arranged at the upper end of the bearing pad threaded rod sleeve 907. A screw hole that penetrates itself is opened on the screwing plate 909. It also includes an upper fixing bolt 910 that cooperates with the screw hole. A lower fixing bolt 912 is arranged outside the bearing pad threaded rod sleeve 907.

[0033] In this embodiment, during operation, the support device is first assembled. First, the width of the groove is measured with a ruler. Then, one end of the telescopic rod assembly 4 is hinged to the through hole at the lower part of the limit groove 5 through a pin shaft. Particularly, the limit groove 5 is made of high-strength low-alloy steel (such as Q345B), and the surface of the limit groove 5 is subjected to shot peening strengthening treatment. Then, a compressive stress layer is set at a position 0.1 - 0.3 mm below the surface of the limit groove 5. The groove corners of the limit groove 5 adopt arc transitions (radius R is greater than or equal to 5 mm), and the edges of the openings on the limit groove 5 are all chamfered with rounded corners, and the chamfer radius R is greater than or equal to 2 mm. Then, transverse reinforcing ribs are provided on the back of the limit groove 5, and longitudinal rib plates are provided along the length direction of the limit groove 5. Through finite element analysis (FEA) simulation calculation, when the radius of the corner of the limit groove 5 is R = 8 mm and 3 transverse reinforcing ribs (thickness 12 mm) are added to the back of the limit groove 5, the maximum stress under static loading is 135 MPa, thus realizing the problem of eliminating excessive stress concentration; Then, the length of the pressure-bearing screw 2 is adjusted by adjusting the sleeve 3. Then, the pipe positioning plate 901 of the pipe centering assembly 9 is sleeved on the outer side of the threaded rod 201 through the pressure-bearing screw sleeve 902. Then, it is determined whether to install a spacer 905 between the adjusting sleeve 3 and the pressure-bearing screw sleeve 902 according to the diameter of the pipe. Particularly, a spring or a disc spring can also be installed between the two pressure-bearing screws 2 to bear part of the pressure, so as to reduce the pressure on the thread between the pressure-bearing screw 2 and the adjusting sleeve 3. Then, the pressure-bearing pad socket 906 is sleeved on the outer side of the threaded rod 201 and away from the adjusting sleeve 3. Then, the assembled pipe centering assembly 9 and the pressure-bearing screw 2 are hinged to the limit groove 5 through a pin shaft, thus realizing the side support of the left support plate 1 and the right support plate 6 by the pressure-bearing screw 2; To solve the problem of pressure concentration on the pressure-bearing screw 2, the upper fixing bolt 910 and the lower fixing bolt 912 on the pressure-bearing pad socket 906 are unscrewed from the pressure-bearing pad socket 906, so that the pressure-bearing pad threaded rod sleeves 907 and the socket rings 908 arranged symmetrically left and right on the pressure-bearing pad socket 906 are separated. Then, the pressure-bearing pad threaded rod sleeves 907 and the socket rings 908 arranged symmetrically left and right are sleeved on the outside of the threaded rod 201 and are re-fixed by the upper fixing bolt 910 and the lower fixing bolt 912. Then, by rotating the telescopic rod assembly 4 by a certain angle around the hinge, the pressure-bearing pad 405 is oriented towards the pressure-bearing pad socket 906. Then, the crank 402 is rotated manually. When the crank 402 rotates, it drives the worm 407 to rotate. Immediately, the worm 407 drives the turbine 408 to rotate. Then, the turbine 408 drives the driving rotating cylinder 409 to rotate. The driving rotating cylinder 409 drives the driven threaded rod 410 and the first driven rotating cylinder 413 to rotate through the threaded fit with the driven threaded rod 410 and the first driven rotating cylinder 413. Then, the first driven rotating cylinder 413 drives the second driven rotating cylinder 412 to rotate through the threaded fit with the second driven rotating cylinder 412. Then, the second driven rotating cylinder 412 and the third driven rotating cylinder 411 drive the third driven rotating cylinder 411 to rotate through the threaded fit, so that the length of the telescopic rod assembly 4 becomes longer. The pressure-bearing pad 405 is gradually extended into the pressure-bearing pad socket 906 of the socket pad 904. Then, the length of the telescopic rod assembly 4 is kept unchanged under the self-locking of the worm 407 and the turbine 408, so that the pressure-bearing screw 2, the limit groove 5 and the telescopic rod assembly 4 form a triangular structure. While the telescopic rod assembly 4 provides a supporting force to the left support plate 1 and the right support plate 6, the structural stability of the supporting device is enhanced.

[0034] When the pipeline needs to be centered, the provided suspension rod is fixed to the anchor rod 8 by plugging. Then, the pipeline is hoisted by the pulley assembly installed below the suspension rod, so that the pipeline is placed between the opposite surfaces of the two pipeline positioning plates 901 of the pipeline centering assembly 9. Since the lower end of the pipeline positioning plate 901 is arc-shaped, the problem of the pipeline running off during installation is avoided. Then, by shortening the length of the telescopic rod assembly 4, the pressure-bearing pad 405 is disengaged from the pressure-bearing pad socket 906. Then, the telescopic rod assembly 4 is rotated from the inclined state to the horizontal state. The length of the telescopic rod assembly 4 is extended again until the pressure-bearing pad 405 extends into the telescopic rod limit groove 903 and is tightened, so as to fix the position of the pipeline. Then, the pipeline is pre-buried, and the soil layer is reinforced by a rammer while burying the pipe.

[0035] The arc section of the pipeline positioning plate 901 can also be connected to the vertical section in a hinged manner to accommodate pipelines of different diameters. Usually, when installing large-diameter pipelines, adjust the arc-shaped limiting plate on the pressure-bearing screw sleeve 902 to increase the opening angle to fit the pipeline, and then adjust the length of the telescopic rod assembly 4 so that the pressure-bearing pad 405 abuts against the telescopic rod limiting groove 903 of the pipeline positioning plate 901. Finally, when embedding the pipeline, use a rammer to compact the soil layers on both sides and at the bottom of the pipeline in layers, with each layer not exceeding 300 mm.

[0036] When installing small-diameter pipelines, adjust the arc-shaped limiting plate on the pressure-bearing screw sleeve 902 to reduce the opening angle so that the pipeline positioning plate 901 fits the pipeline, and then adjust the length of the telescopic rod assembly 4 so that the pressure-bearing pad 405 abuts against the telescopic rod limiting groove 903 of the pipeline positioning plate 901. Finally, when embedding the pipeline, use a rammer to compact the soil layers on both sides and at the bottom of the pipeline in layers, with each layer not exceeding 300 mm.

[0037] In this embodiment, as Figure 7 shown, on the outer side of the end of the active rotating cylinder 409 away from the driven threaded rod 410, there is a telescopic rotating wheel 414, and it also includes a flange 415 that rotates in cooperation with the active rotating cylinder 409.

[0038] In this embodiment, replace the power device of the telescopic rod assembly 4 with the telescopic rotating wheel 414, and directly provide power through the telescopic rotating wheel 414 during the extension and shortening of the telescopic rod assembly 4, which is convenient for adjusting the length of the telescopic rod assembly 4 in a narrow trench.

[0039] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A trench excavation support device for water conservancy project construction, comprising a left support plate and a right support plate arranged symmetrically, and also comprising a pressure rod assembly connecting the left support plate and the right support plate, characterized in that: The pressure-bearing rod assembly includes a group of pressure-bearing screws that are symmetrically arranged and have opposite spiral directions, and also includes an adjusting sleeve that spirally cooperates with the pressure-bearing screws. A telescopic rod assembly is also provided between the opposite surfaces of the left support plate and the right support plate, and a pipe centering assembly is provided at the end of the telescopic rod assembly away from the left support plate or the right support plate.

2. The trench excavation support device for water conservancy project construction according to claim 1, characterized in that: The opposite side end surfaces of the left support plate and the right support plate are provided with limiting grooves extending from the top end to the bottom end of the left support plate or the right support plate, and the horizontal cross-section of the limiting groove is "concave"; pin shaft holes cooperating with the telescopic rod assembly and the pressure-bearing screw are opened at different heights in the limiting groove along the front-to-back direction; an anchor rod hole is opened in the limiting groove along the plumb direction; an anchor rod is arranged in the anchor rod hole of the limiting groove; and a manual turn is cooperated with the pin shaft on the outside of the anchor rod.

3. The trench excavation support device for water conservancy project construction according to claim 2, characterized in that: The left support plate is composed of a water-permeable plate of polymer material, a porous stainless steel plate, a buffer pad, a drainage cavity, a waterproof layer and an aluminum alloy pressure plate from left to right. A plurality of support columns are arranged in the drainage cavity, a sealing plate is arranged at one end of the drainage cavity, and a plug sleeve is arranged at the other end of the drainage cavity.

4. The trench excavation support device for water conservancy project construction according to claim 3, characterized in that: The pressure-bearing screw comprises a threaded rod, which adopts a trapezoidal thread. A fixing seat matching with the pin shaft hole is provided at the end of the threaded rod away from the adjusting sleeve. The inner wall surface of the adjusting sleeve is provided with threads with opposite spiral directions from the middle to the two ends.

5. The trench excavation support device for water conservancy project construction according to claim 4, characterized in that: The telescopic rod assembly includes a telescopic rod, which includes a coaxially arranged active rotating cylinder, a driven threaded rod, a first driven rotating cylinder, a second driven rotating cylinder and a third driven rotating cylinder. The active rotating cylinder is hollow, and the driven threaded rod is arranged in the hollow cavity of the active rotating cylinder. The active rotating cylinder is threadedly matched with the driven threaded rod and the first driven rotating cylinder, the first driven rotating cylinder and the second driven rotating cylinder are threadedly matched, and the second driven rotating cylinder and the third driven rotating cylinder are threadedly matched.

6. The trench excavation support device for water conservancy project construction according to claim 5, characterized in that: The telescopic rod assembly also includes a power assembly, which includes a turbine, which is arranged on the outer side of the active rotating cylinder away from the end of the driven threaded rod, a turbine shell is sleeved on the outer side of the turbine, and also includes a vortex rod matched with the turbine, a vortex rod shell is sleeved on the outer side of the vortex rod, and a crank is fixed to a pin shaft at one end of the vortex rod; and also includes a pressure pad that cooperates with the active rotating cylinder for rotation.

7. The trench excavation support device for water conservancy project construction according to claim 5, characterized in that: The outer side surface of the active rotating cylinder away from the driven threaded rod end is provided with a telescopic rotating wheel, and also includes a flange that rotates with the active rotating cylinder.

8. The trench excavation support device for water conservancy project construction according to claim 6, characterized in that: The pipeline centering assembly includes a group of symmetrically arranged pipeline positioning plates, the pipeline positioning plates include arc surface sections and straight plate sections, a pressure-bearing screw sleeve is provided at the top end of the pipeline positioning plate, the pressure-bearing screw sleeve includes a group of symmetrically arranged and screwed arc-shaped limiting plates, the arc-shaped limiting plates are hinged to the pipeline positioning plates, and a telescopic rod limiting groove cooperating with the telescopic rod is provided at the end of the pipeline positioning plate close to the left support plate or the right support plate.

9. The trench excavation support device for water conservancy project construction according to claim 8, characterized in that: A pad is provided on the outside of the threaded rod, and the cross-section of the pad is in the shape of a semicircular sector. The pad is arranged between the opposite surfaces of the pressure-bearing screw sleeve and the adjusting sleeve. A socket pad is provided at the end of the pressure-bearing screw sleeve away from the pad. The socket pad is composed of a group of symmetrically arranged left and right pressure-bearing sleeves, and a pressure-bearing pad socket sleeve is provided at the bottom end of the socket pad.

10. The trench excavation support device for water conservancy project construction according to claim 9, characterized in that: The socket pad includes a left-right symmetrical pressure pad threaded rod sleeve, a threaded rod hole cooperating with the threaded rod is opened along the length direction of the pressure pad threaded rod sleeve, a socket ring is integrally connected to the lower end of the pressure pad threaded rod sleeve, a screw plate is provided at the upper end of the pressure pad threaded rod sleeve, a screw hole penetrating through the screw plate is opened on the screw plate, and also includes an upper fixing bolt cooperating with the screw hole, and a lower fixing bolt is provided on the outer side of the pressure pad threaded rod sleeve.

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