A modular continuous trench stepless adjustment support device

Abstract

A modular, continuously adjustable support device for trenches includes front and rear support plates. Positioning plates are vertically installed on the left and right edges of opposite sides of each support plate. At least two crossbeams are detachably installed between the positioning plates of each support plate. The crossbeams on the front and rear support plates are aligned and connected by a continuously adjustable telescopic support rod device. Each support plate has a protrusion on one end face and a groove on the other end face. Adjacent support plates are assembled using the protrusion and groove. This modular, continuously adjustable support device for trenches simplifies the process, reduces construction costs, and avoids noise pollution.

Description

Technical Field

[0001] This utility model relates to the field of trench support, and in particular to a modular continuous trench stepless adjustable support device, which can be applied to different trench support excavation depths and widths, while having better overall integrity. Background Technology

[0002] Due to environmental constraints, trench excavation for municipal pipeline construction often employs vertical excavation. To prevent collapse and ensure the safety of construction workers during the excavation process, support structures are required to support the soil on both sides.

[0003] Currently, the most common support method at construction sites is Larssen sheet pile support. After drilling, sheet piles are driven into the ground by a pile driver to form a continuous pile bank. Then, the earthwork is excavated, and cross bracing and girders are used to support the foundation pit. This method has a relatively complex construction process, inconvenient material transportation, high construction investment, and the noise and vibration generated during construction can have a certain impact on the urban environment. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a modular continuous trench stepless adjustment support device. Through modular assembly and simple adjustment operation, the relevant construction procedures are reduced, the relevant material input is reduced, the construction cost is lowered, and the impact of noise and vibration on the urban environment is avoided.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A modular continuous trench stepless adjustable support device includes front and rear support plates. The left and right edges of the opposite side of the front and rear support plates are vertically provided with positioning plates. At least two crossbeams are detachably installed between the positioning plates of each support plate. The crossbeams on the front and rear support plates are aligned and connected by a stepless adjustable telescopic support rod device. Each support plate has a protrusion on one end face and a groove on the other end face. The left and right adjacent support plates are assembled by the protrusion and the groove.

[0006] The positioning plate has multiple first positioning holes along its length; the corresponding two ends of the crossbeam are provided with mounting plates, and the mounting plates and the positioning plates are detachably connected by bolts.

[0007] The continuously adjustable telescopic support rod device includes an inner rod, the two ends of which are slidably engaged with the outer rods; the other ends of the two outer rods are fixed with fixed ends, which are inserted into the crossbeam and fixed with bolts; the inner rod inputs or outputs hydraulic oil through an oil circuit system.

[0008] The oil circuit system includes an oil distribution pipe connected to the inner rod, multiple oil distribution pipes of the inner rod are connected to an oil distributor, the oil distributor is connected to an oil pump through an oil circuit, and the oil pump is connected to an oil supply tank through an oil circuit.

[0009] The crossbeam is provided with multiple second positioning holes along its length.

[0010] Each support plate corresponds to two crossbeams, which are arranged vertically at intervals.

[0011] Both the inner and outer rods are equipped with oil passages, and the oil passages of the two rods are interconnected.

[0012] This utility model provides a modular continuous groove stepless adjustment support device, which has the following technical effects: 1) By setting protrusions and grooves on the left and right sides of the support plate respectively, the device is assembled into a whole. At the same time, compared with simple flat mating, the concave-convex connection greatly increases the effective contact area and significantly improves the connection strength. Thus, when the device is subjected to external force, the side walls of the protrusions and grooves interlock to prevent relative sliding of the device and better resist torsion and deformation.

[0013] 2) By setting positioning plates on the left and right ends of the support plate, on the one hand, crossbeams can be installed to fix the support rod device, and different positioning holes can adapt to trench support construction at different excavation depths; on the other hand, the two support plates can be connected by bolts through the positioning plates to improve the overall rigidity of the device and better withstand the effects of external forces.

[0014] 3) By installing a stepless adjustable telescopic support rod device between the front and rear support plates, continuous adjustment and stable support can be achieved for any excavation width of the foundation pit. It is not controlled by preset gears or hole positions, providing great flexibility for construction and adapting to complex and changing construction environments; at the same time, more precise adjustments allow for more accurate support positioning and more effective use of the device's supporting function. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the installation structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the crossbeam structure in this utility model.

[0017] Figure 3 This is a schematic diagram of the stepless adjustable telescopic support rod device in this utility model.

[0018] Figure 4 This is a schematic diagram of the installation after the two sets of support units of this utility model are fully fitted together.

[0019] Figure 5 This is a cross-sectional view of the inner rod and outer rod in this utility model.

[0020] In the diagram: 1. Support plate; 2. Protrusion; 3. Groove; 4. Positioning plate; 5. Crossbeam; 6. Steplessly adjustable telescopic support rod device; 7. Fixed end; 8. Oil pump; 9. Oil distributor; 10. Oil distribution pipe; 11. Inner rod; 12. Outer rod; 13. Solenoid valve; 14. Piston. Detailed Implementation

[0021] like Figure 1-4 As shown, a modular continuous trench stepless adjustable support device includes front and rear support plates 1. Each support plate 1 has a protrusion 2 on one side along the vertical direction and a groove 3 on the other side along the vertical direction. The protrusion 2 can be embedded into the groove 3 and slide in cooperation with it. Positioning plates 4 are fixed to the opposite end edges of the front and rear support plates 1. The positioning plates 4 have multiple first positioning holes spaced along their length. A crossbeam 5 is provided between the two positioning plates 4 of each support plate 1. The two ends of the crossbeam 5 have vertical mounting plates with mounting holes. Bolts pass through the mounting plates and positioning plates 4 to fix the crossbeam 5 to the end face of the support plate 1. A stepless adjustable telescopic support rod device 6 is fixed on the crossbeam 5 between the front and rear support plates 1.

[0022] like Figure 5 As shown, the continuously adjustable telescopic support rod device 6 includes an inner rod 11, which is hollow and open at both ends. Pistons 14 are provided on the outer walls of both ends of the inner rod 11, and the pistons 14 are in close contact with the inner walls of the outer rod 12. The outer rod 12 is also a hollow structure, and each outer rod 12 has a fixed end 7 fixed at its other end. The fixed end 7 is inserted into the crossbeam 5 through a groove and fixed with bolts. An oil distribution pipe 10 is connected in the middle of the inner rod 11, and the oil distribution pipe 10 is equipped with a solenoid valve 13, which can realize the opening and closing of the oil distribution pipe 10. The oil distribution pipes 10 of multiple inner rods 11 are connected to an oil distributor 9, which is connected to an oil pump 8 through an oil circuit. The oil pump 8 is connected to an oil supply tank through an oil circuit. The oil pump 8 is a bidirectional pump, which can introduce oil into or draw oil out of the inner rod 11.

[0023] The left and right adjacent support plates 1 are joined together by sliding fit between the protrusions 2 and the grooves 3. The positioning plates 4 between the left and right adjacent support plates 1 are aligned and connected by bolts to complete the splicing.

[0024] Preferably, the positioning plate 4 is provided with a positioning hole every 0.2m, and the crossbeam 5 is bolted to the different positioning holes on the positioning plate 4, so as to adapt to the needs of excavation support at different trench depths. When the excavation depth is deep, the two crossbeams need to be positioned separately above and below the support plate to better support the entire support plate; when the excavation depth is shallow, the support plate may not be able to be fully inserted into the foundation pit, and the crossbeams need to be connected to the bottom of the positioning plate to effectively provide support.

[0025] Preferably, a second positioning hole is set every 0.5m on the crossbeam 5. The stepless adjustable telescopic support rod device 6 is bolted to the different second positioning holes on the crossbeam 5. After the multiple support plates 1 are assembled into modules, the position of the support rod 6 can be adjusted according to the stress conditions to meet the stress requirements. It can also be adjusted according to the on-site construction conditions, such as the size of the excavator bucket, to reduce the construction difficulty.

[0026] Preferably, the stepless adjustable telescopic support rod device 6 adjusts the oil pump 8, uses the oil distributor 9 and the parallel diversion pipe 10 to deliver or retrieve oil, and the change in oil pressure drives the movement of the fixed end 7 to complete the stepless adjustment.

[0027] Working principle and process: Referring to the relevant drawings, the stress calculation of the support structure was carried out according to the excavation depth and width of the foundation pit, and the connection positions of the crossbeam 5 and the positioning plate 4 and the stepless adjustable telescopic support rod 6 and the crossbeam 5 were determined. The relevant connections were completed before excavation.

[0028] After laying the support plate 1 horizontally with the positioning plate 4 facing upwards, place the crossbeam 5 on the positioning plate 1 and then connect it with bolts and nuts. After the connection is completed, install the stepless adjustable telescopic support rod device 6, connect the fixed end 7 to the positioning hole reserved on the crossbeam 5 with bolts and nuts, and finally connect it to the support plate 1 on the other side.

[0029] According to the drawings, the excavation location of the foundation pit is measured and marked out. After partial excavation based on the relevant geological conditions, the support structure is hoisted. It can be connected to the positioning holes on the positioning plate 4 using chains for easy hoisting. After confirming the stability of the support structure, the next step of excavation is carried out.

[0030] After excavation reaches a certain depth, the continuously adjustable telescopic support rod device 6 is adjusted. When extension is required, the oil pump 8 is started, the solenoid valve 13 is opened, and oil is delivered to the inner rod 11 and the outer rod 12 through the oil distributor 9 fixed on the support plate 1 and the parallel oil distribution pipe 10. The increase in oil pressure squeezes the fixed end 7 outward, making the support plate 1 tightly adhere to the soil on both sides, preventing the soil on both sides of the foundation pit from loosening. After adjustment, the solenoid valve 13 is closed, which can achieve a pressure-maintaining effect. When retraction is required, the solenoid valve 13 is opened again, and the oil pump 8 is started to draw out and return the oil in the inner rod 11 and outer rod 12. The oil pressure between the inner rod 11 and outer rod 12 decreases, and at the same time, under the action of external force (the excavator mechanically presses down on the support plate 1), the support plate 1 moves inward, which can reduce unnecessary excavation.

[0031] After the first support structure is completed, continuous modular installation is carried out. The second support structure is then hoisted, and the top of the protrusion 2 on the side of the first support plate 1 is connected to the bottom of the assembly structure 3 on the side of the second support plate 1. As the excavation depth increases, they gradually fit together completely, forming a continuous integral support structure. After complete fitting, the positioning plates 4 of the adjacent first and second support plates 1 are connected with bolts to improve the overall rigidity of the device and its ability to withstand external forces.

Claims

1. A modular continuous trench stepless adjustment support device, characterized in that: The system includes front and rear support plates (1). The left and right edges of the opposite side of the front and rear support plates (1) are vertically provided with positioning plates (4). At least two crossbeams (5) are detachably installed between the positioning plates (4) of each support plate (1). The crossbeams (5) on the front and rear support plates (1) are directly opposite each other and connected by a stepless adjustable telescopic support rod device (6). Each support plate (1) has a protrusion (2) on one side end face and a groove (3) on the other side end face. The left and right adjacent support plates (1) are assembled through the protrusion (2) and the groove (3).

2. The modular continuous trench stepless adjustment support device according to claim 1, characterized in that: The positioning plate (4) has multiple first positioning holes along its length; the corresponding crossbeam (5) has mounting plates at both ends, and the mounting plates and the positioning plate (4) are detachably connected by bolts.

3. The modular continuous trench stepless adjustment support device according to claim 2, characterized in that: The stepless adjustable telescopic support rod device (6) includes an inner rod (11), with both ends of the inner rod (11) slidingly engaged with the outer rods (12); the other ends of the two outer rods (12) are fixed with fixed ends (7), which are inserted into the crossbeam (5) and fixed with bolts; the inner rod (11) inputs or outputs hydraulic oil through the oil circuit system.

4. The modular continuous trench stepless adjustment support device according to claim 3, characterized in that: The oil circuit system includes an oil distribution pipe (10) connected to the inner rod (11). The oil distribution pipes (10) of multiple inner rods (11) are connected to the oil distributor (9). The oil distributor (9) is connected to the oil pump (8) through the oil circuit. The oil pump (8) is connected to the oil supply tank through the oil circuit.

5. The modular continuous trench stepless adjustment support device according to claim 4, characterized in that: The crossbeam (5) has multiple second positioning holes along its length.

6. The modular continuous trench stepless adjustment support device according to claim 5, characterized in that: Each support plate (1) corresponds to two crossbeams (5), and the two crossbeams (5) are arranged vertically at intervals.

7. The modular continuous trench stepless adjustment support device according to claim 6, characterized in that: Both the inner rod (11) and the outer rod (12) are provided with oil passages, and the oil passages of the two are interconnected.

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