Open excavation foundation pit reinforcement support device and construction method for power tunnel under thick silt layer

Abstract

The present invention discloses a reinforcement support device and a construction method for an open excavation foundation pit of an electric power tunnel under a thick silt layer, belonging to the field of support devices, and comprising a first support device body, one end of which is provided with a sliding block, and the sliding block is embedded in the inner wall of a first slide groove; by arranging an adjusting mechanism and a connecting mechanism to cooperate with each other, when the first support device body and the second support device body are installed, the connecting mechanism can be used to control a cross bar so that the cross bar is embedded in the inside of a groove, and then the adjusting mechanism is used to adjust the positions of the two support device bodies, so that the two support device bodies are aligned, and then the two support device bodies are connected together by bolts, so that the first support device body and the second support device body are installed, and the fast positioning and precise alignment of the support devices during the installation process are realized, and there is no need for manual heavy position adjustment, which significantly reduces the labor intensity of workers and improves construction efficiency.

Description

Technical Field

[0001] The present invention relates to the field of support devices, and more specifically, to an open excavation foundation pit reinforcement support device for a power tunnel under a thick silt layer and a construction method. Background Art

[0002] In the process of urbanization, power tunnels, as an important part of urban infrastructure, undertake the key task of power transmission and distribution. However, in areas with complex geological conditions, especially in areas with deep silt layers, the construction of power tunnels faces many challenges. The deep silt layers have the characteristics of high water content, strong compressibility and low bearing capacity, which poses a great test to the stability and safety of the open excavation pit of the power tunnel.

[0003] When installing the existing support device, first the crane lifts the support device body, then moves the support device body to the corresponding position, and then manually adjusts the position of the support device body so that the ends of the two support device bodies are aligned, and finally the support device bodies are connected together by bolts, thereby splicing the support device bodies together to meet the corresponding length, and finally the length compensation system is used to place the support device body horizontally on the inner wall of the foundation pit, thereby supporting the foundation pit.

[0004] Although manual adjustments can be made when connecting the main body of the support device, in actual operation, due to the overall weight of the main body of the support device, when manually adjusting the position of the main body of the support device, there is a problem that the overall labor intensity of the workers is high, which is not conducive to construction. Summary of the invention

[0005] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose an open excavation foundation pit reinforcement support device and a construction method for a power tunnel under a thick silt layer, which can solve the problems of high manual labor intensity and inconvenient installation during installation and adjustment of the existing support device.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The present invention provides a reinforcement support device and a construction method for an open excavation foundation pit of an electric power tunnel under a thick silt layer. The reinforcement support device for an open excavation foundation pit of an electric power tunnel under a thick silt layer comprises a first support device body and a second support device body. A slider is provided at one end of the first support device body, the slider is embedded in the inner wall of a first slide groove, the end of the slider away from the first support device body is embedded in the inner wall of a groove, the groove opens the end of the second support device body, a control mechanism for controlling the movement of the slider is provided on the side of the slider close to the first slide groove, a cross bar is provided on the side of the slider close to the groove, the cross bar is embedded in the inner wall of the groove, the cross bar is connected to the slider through a connecting mechanism, and the inner wall of the cross bar is provided with a control mechanism for maintaining the second support device body An adjustment mechanism for docking and calibration with the first support device body, a first fixing plate is fixedly installed at the end of the second support device body, and a second fixing plate is fixedly installed at the end of the first support device body; when the second support device body and the first support device body are aligned, the cross bar can be embedded into the inner wall of the second connecting block, and then the slider is driven to move by the control mechanism, thereby pulling the cross bar, so that the cross bar pulls the second support device body and the first support device body together, thereby aligning the second support device body and the first support device body, and finally the second support device body and the first support device body are connected together by fixing bolts. Compared with traditional manual adjustment, mechanical means are more efficient and reduce the labor intensity of workers.

[0008] In a preferred technical solution of the present invention, the control mechanism includes a threaded sleeve fixedly installed on one side of the sliding block, the threaded sleeve is slidably installed on the inner wall of the first sliding groove, the inner wall of the threaded sleeve is threadedly connected with a threaded rod, one end of the threaded rod is connected to the inner wall of the first sliding groove, and the other end of the threaded rod is rotatably connected to a fixed block, the fixed block is fixedly installed on the inner wall of the first sliding groove, the threaded rod is placed on the outer wall of the inner wall of the fixed block and a first bevel gear is fixedly installed, one side of the first bevel gear is meshedly connected with a second bevel gear, and a control rod is fixedly installed on the side of the second bevel gear away from the first bevel gear, the control rod passes through the fixed block and the first support device body and extends to one side of the first support device body; it can be used to control the first bevel gear. When the position of a support device body is adjusted, the control rod can be rotated to make the control rod drive the second bevel gear to rotate, the second bevel gear rotation drives the first bevel gear rotation, the first bevel gear rotation drives the threaded rod rotation, the threaded rod rotation drives the threaded sleeve to move, thereby driving the slider to move, and adjusting the slider position. When the slider is adjusted, it is to pull the first support device body to move, so the force required in the process of moving the slider is relatively large. This structure adopts threaded transmission, which can save labor very well. In addition, through the threaded method, it can be achieved that the slider will not move under the action of tension without the worker pulling it, thereby improving the stability of the connection between the two and facilitating the workers to install the fixing bolts.

[0009] In a preferred technical solution of the present invention, the connecting mechanism includes a first connecting block arranged at the end of the sliding block, the inner wall of the first connecting block is rotatably mounted with a second connecting block, and the other two sides of the outer wall of the second connecting block are rotatably mounted with third connecting blocks, and the first rotating rod is fixedly mounted on the end of the third connecting block away from the second connecting block, and a connecting plate is rotatably mounted on the outer wall of the first rotating rod, a vertical rod is slidably mounted on the inner wall of the connecting plate, and a cross rod is fixedly mounted on the bottom end of the vertical rod; when the two first support device bodies are not aligned, the position of the cross rod can be adjusted by rotating the third connecting block until the cross rod is embedded in the inner wall of the groove. Because of the positional relationship between the third connecting block and the first connecting block, the third connecting block can rotate at many angles and can also cooperate with the sliding of the vertical rod, which can be suitable for the two first support device bodies to be staggered left and right, and the two first support device bodies have different heights, but the distance difference between the two cannot be too large. If the difference is large, the position of the crane can be adjusted to adjust the position of the first support device body.

[0010] The cam is an assembly made of a plurality of gears, each of which is connected to a plurality of gears of the plurality of gears, and the plurality of gears are connected to each other with a plurality of gears, and the plurality of gears are connected to each other with a plurality of gears.

[0011] In a preferred technical solution of the present invention, a fourth connecting block is fixedly installed on the outer wall of the second rotating rod, and a pin is slidably installed on the top of the fourth connecting block. The pin is embedded in the inner wall of the slot. The slot is opened at the top of the vertical rod. After the block abuts against the inner wall of the limiting slot, the pin can be embedded in the inner wall of the slot, thereby fixing the second rotating rod and playing a limiting role.

[0012] In a preferred technical solution of the present invention, the clamping grooves are distributed in a circular array along the axis of the second rotating rod.

[0013] In a preferred technical solution of the present invention, two card blocks are provided, and the two card blocks are symmetrically arranged on both sides of the cross bar, each of the card blocks is connected to the rack plate, and the two rack plates are respectively engaged with the first gear, so that when the second rotating rod is rotated, the card blocks can be driven to open to both sides or shrink to the middle at the same time, thereby ensuring that the contracted and extended lengths of the card blocks are the same.

[0014] In a preferred technical solution of the present invention, the end of the clamping block is arranged to be inclined, so that the clamping block can be more conveniently embedded in the inner wall of the limiting groove.

[0015] In a preferred technical solution of the present invention, the length between the two ends of the crossbar is smaller than the distance between the two sides of the groove notch, the side wall of the threaded sleeve is meshedly connected with a second gear, the second gear is rotatably mounted on the inner wall of the first support device body, a sliding plate is provided on the side of the second gear away from the threaded sleeve, the sliding plate is meshedly connected with the second gear, a baffle is fixedly mounted on the outer wall of the sliding plate, and a fixing rod is fixedly mounted on the side wall of the baffle. The crossbar can be embedded into the inner wall of the groove, thereby reducing the moving distance of the slider. If the length between the two ends of the crossbar is greater than the distance between the two sides of the groove notch, the crossbar needs to be tilted to be embedded into the inner wall of the groove.

[0016] The construction method of the open excavation foundation pit reinforcement support device of the power tunnel under the thick silt layer includes the following steps:

[0017] Step 1: Fix the main body of the second supporting device with a crane, and then move it to the designated position. At this time, under the action of the crane, simply align the ends of the main body of the second supporting device and the main body of the first supporting device;

[0018] Step 2: Pull the cross bar so that it rotates around the second connecting block accordingly until the cross bar is moved to the top of the groove, and after being accommodated, push the vertical bar downward so that the vertical bar drives the cross bar to embed into the inner wall of the groove;

[0019] Step 3: Pull the latch to disengage the latch from the inner wall of the slot, then rotate the second rotating rod to drive the first gear to rotate, the first gear rotates to drive the rack plate to move, the rack plate moves to drive the block to move, so that the block is embedded in the inner wall of the limit slot, until both ends of the block are in contact with the bottom end of the first supporting device body respectively, that is, the connecting plate is at the center line of the groove, and the latch is re-embedded into the inner wall of the slot;

[0020] Step 4: Rotate the control rod. The rotation of the control rod drives the second bevel gear to rotate. The rotation of the second bevel gear drives the first bevel gear to rotate. The rotation of the first bevel gear drives the threaded rod to rotate. The rotation of the threaded rod drives the threaded sleeve to slide on the inner wall of the first slide groove. The sliding of the threaded sleeve drives the slider to move. When the slider moves, it pulls the first support device body closer and aligns the second support device body with the first support device body until the ends of the second support device body and the first support device body are attached together.

[0021] Step 5: When the ends of the second support device body and the first support device body are fitted together, the threaded sleeve will drive the second gear to rotate, and the rotation of the second gear will drive the sliding plate to move. The movement of the sliding plate will drive the baffle and the fixing rod to pass through the fixing holes on the first fixing plate and the second fixing plate. The second support device body and the first support device body are connected with fixing bolts. Finally, through the length compensation system, the second support device body and the first support device body are placed horizontally on the inner wall of the foundation pit to support the foundation pit.

[0022] The beneficial effects of the present invention are:

[0023] The open excavation foundation pit reinforcement support device and construction method for a power tunnel under a thick silt layer provided by the present invention can cooperate with each other by arranging an adjusting mechanism and a connecting mechanism. When installing a second supporting device body and a first supporting device body, the connecting mechanism can be used to control a cross bar so that the cross bar is embedded in the interior of a groove. Then, the adjusting mechanism is used to adjust the position of the second supporting device body and the first supporting device body, so that the second supporting device body and the first supporting device body are aligned. Then, the second supporting device body and the first supporting device body are connected together by bolts, so that the second supporting device body and the first supporting device body are installed, and the support device is quickly positioned and accurately aligned during the installation process without the need for manual heavy position adjustment, which significantly reduces the labor intensity of workers and improves construction efficiency.

[0024] By setting up a control mechanism, when adjusting the position of the main body of the first support device, the control rod can be rotated, so that the control rod drives the second bevel gear to rotate, the rotation of the second bevel gear drives the first bevel gear to rotate, the rotation of the first bevel gear drives the threaded rod to rotate, the rotation of the threaded rod drives the threaded sleeve to move, thereby driving the slider to move, so as to adjust the position of the slider. When the slider is adjusted, it is to pull the main body of the first support device to move, so the force required in the process of moving the slider is relatively large. This structure adopts a threaded transmission method, which can save labor very well. In addition, through the threaded method, it can be achieved that the slider will not move under the action of tension without the worker pulling it, thereby improving the stability of the connection between the two and facilitating the workers to install the fixing bolts.

[0025] By setting up an adjustment mechanism, after the cross bar is embedded in the groove, the second rotating rod can be rotated, so that the second rotating rod drives the first gear to rotate, and the rotation of the first gear drives the rack plate to move to both sides, and the movement of the rack plate drives the block to move until the block is embedded in the inner wall of the limit groove and abuts against the inner wall of the limit groove. This not only strengthens the connection between the cross bar and the groove, but also adjusts the position of the main body of the first support device, so that after the slider is pulled, the position of the main body of the first support device can be aligned. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The overall structure of the open excavation foundation pit reinforcement support device for a power tunnel under a thick silt layer provided by the present invention is shown in FIG. Figure 1 ;

[0027] Figure 2 yes Figure 1 Schematic diagram of the main explosion structure of the first support device Figure 1 ;

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 yes Figure 3 Enlarged view of point D in the middle;

[0030] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0031] Figure 6 yes Figure 3 Enlarged view of point C in the middle;

[0032] Figure 7 The overall structure of the open excavation foundation pit reinforcement support device for a power tunnel under a thick silt layer provided by the present invention is shown in FIG. Figure 2 ;

[0033] Figure 8 yes Figure 7 Schematic diagram of the main explosion structure of the first support device Figure 2 ;

[0034] Fig. 9 yes Figure 8 Enlarged view of point E in the middle.

[0035] In the figure:

[0036] 1. The main body of the first supporting device; 2. The slider; 3. The first slide groove; 4. The groove; 5. The threaded sleeve; 6. The threaded rod; 7. The fixed block; 8. The first bevel gear; 9. The second bevel gear; 10. The control rod; 11. The first connecting block; 12. The second connecting block; 13. The third connecting block; 14. The first rotating rod; 15. The connecting plate; 16. The vertical rod; 17. The horizontal rod; 18. The second rotating rod; 19. The first gear; 20. The rack plate; 21. The block; 22. The fourth connecting block; 23. The latch; 24. The slot; 25. The limit groove; 26. The main body of the second supporting device; 27. The baffle; 28. The fixed rod; 29. ​​The sliding plate; 30. The second gear; 31. The first fixed disk; 32. The second fixed disk. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] like Figure 1-Figure 9As shown, in the embodiment, a reinforcement support device and a construction method for an open excavation foundation pit of an electric power tunnel under a thick silt layer are provided, including a first support device body 1, a slider 2 is provided at one end of the first support device body 1, the slider 2 is embedded in the inner wall of the first slide groove 3, the end of the slider 2 away from the first support device body 1 is embedded in the inner wall of the groove 4, the groove 4 is opened at the end of the second support device body 26, a control mechanism for controlling the movement of the slider 2 is provided on the side of the slider 2 close to the first slide groove 3, a cross bar 17 is provided on the side of the slider 2 close to the groove 4, the cross bar 17 is embedded in the inner wall of the groove 4, the cross bar 17 is connected to the slider 2 through a connecting mechanism, and an adjustment mechanism for maintaining the docking and alignment of the second support device body 26 and the first support device body 1 is provided on the inner wall of the cross bar 17, a first fixed plate 31 is fixedly installed at the end of the second support device body 26, and a second fixed plate 32 is fixedly installed at the end of the first support device body 1.

[0039] When aligning the second supporting device body 26 with the first supporting device body 1, the cross bar 17 can be embedded into the inner wall of the second connecting block 12, and then the slider 2 is driven to move by the control mechanism, thereby pulling the cross bar 17, so that the cross bar 17 pulls the second supporting device body 26 and the first supporting device body 1 together, thereby aligning the second supporting device body 26 and the first supporting device body 1, and finally connecting the second supporting device body 26 and the first supporting device body 1 together by fixing bolts. Compared with traditional manual adjustment, mechanical means are more efficient and reduce the labor intensity of workers.

[0040] See also Figure 2-Figure 6 The control mechanism includes a threaded sleeve 5 fixedly mounted on one side of the slider 2, the threaded sleeve 5 is slidably mounted on the inner wall of the first slide groove 3, the inner wall of the threaded sleeve 5 is threadedly connected with a threaded rod 6, one end of the threaded rod 6 is connected to the inner wall of the first slide groove 3, and the other end of the threaded rod 6 is rotatably connected to a fixed block 7, the fixed block 7 is fixedly mounted on the inner wall of the first slide groove 3, the threaded rod 6 is placed on the outer wall of the inner wall of the fixed block 7 and is fixedly mounted with a first bevel gear 8, one side of the first bevel gear 8 is meshedly connected with a second bevel gear 9, and a control rod 10 is fixedly mounted on the side of the second bevel gear 9 away from the first bevel gear 8, and the control rod 10 passes through the fixed block 7 and the first support device body 1 and extends to one side of the first support device body 1.

[0041] When the position of the first supporting device body 1 is adjusted, the control rod 10 can be rotated to make the control rod 10 drive the second bevel gear 9 to rotate, and the rotation of the second bevel gear 9 drives the first bevel gear 8 to rotate, and the rotation of the first bevel gear 8 drives the threaded rod 6 to rotate, and the rotation of the threaded rod 6 drives the threaded sleeve 5 to move, thereby driving the slider 2 to move, so as to adjust the position of the slider 2. When the slider 2 is adjusted, it is to pull the first supporting device body 1 to move, so the force required in the process of moving the slider 2 is relatively large. The present structure adopts a threaded transmission method, which can save labor very well. In addition, through the threaded method, it can be achieved that the slider 2 will not move under the action of tension without the worker pulling it, thereby improving the stability of the connection between the two and facilitating the workers to install the fixing bolts.

[0042] See also Figure 2-Figure 6 The connecting mechanism includes a first connecting block 11 arranged at the end of the slider 2, a second connecting block 12 is rotatably installed on the inner wall of the first connecting block 11, and a third connecting block 13 is rotatably installed on the other two sides of the outer wall of the second connecting block 12, a first rotating rod 14 is fixedly installed on one end of the third connecting block 13 away from the second connecting block 12, a connecting plate 15 is rotatably installed on the outer wall of the first rotating rod 14, a vertical rod 16 is slidably installed on the inner wall of the connecting plate 15, and a horizontal rod 17 is fixedly installed on the bottom end of the vertical rod 16.

[0043] When the two first supporting device bodies 1 are not aligned, the position of the cross bar 17 can be adjusted by rotating the third connecting block 13 until the cross bar 17 is embedded in the inner wall of the groove 4. Because of the positional relationship between the third connecting block 13 and the first connecting block 11, the third connecting block 13 can be rotated at many angles and can also cooperate with the sliding of the vertical rod 16. It can be suitable for the two first supporting device bodies 1 to be staggered left and right and the two first supporting device bodies 1 to be of different heights, but the distance between the two cannot be too large. If the difference is large, the position of the crane can be adjusted to adjust the position of the first supporting device body 1.

[0044] See also Figure 2-Figure 6 The adjustment mechanism includes a block 21 arranged on the inner wall of the cross bar 17, a rack plate 20 is fixedly installed on the side of the block 21 close to the cross bar 17, a first gear 19 is meshedly connected to one side of the rack plate 20, a second rotating rod 18 is fixedly installed on the top of the first gear 19, the second rotating rod 18 passes through the cross bar 17 and the vertical rod 16 and extends to the top of the vertical rod 16, the side of the block 21 away from the cross bar 17 is embedded in the inner wall of the limiting groove 25, and the limiting groove 25 is opened on both sides of the bottom of the groove 4.

[0045] After the cross bar 17 is embedded in the groove 4, the second rotating rod 18 can be rotated so that the second rotating rod 18 drives the first gear 19 to rotate. The rotation of the first gear 19 drives the rack plate 20 to move to both sides. The movement of the rack plate 20 drives the block 21 to move until the block 21 is embedded in the inner wall of the limit groove 25 and abuts against the inner wall of the limit groove 25. This not only strengthens the connection between the cross bar 17 and the groove 4, but also adjusts the position of the first support device body 1 so that the position of the first support device body 1 can be aligned after the slider 2 is pulled.

[0046] See also Figure 2-Figure 6 A fourth connecting block 22 is fixedly installed on the outer wall of the second rotating rod 18, and a pin 23 is slidably installed on the top of the fourth connecting block 22. The pin 23 is embedded in the inner wall of the card slot 24, and the card slot 24 is opened at the top of the vertical rod 16; after the card block 21 abuts against the inner wall of the limiting groove 25, the pin 23 can be embedded in the inner wall of the card slot 24, thereby fixing the second rotating rod 18 and playing a limiting role.

[0047] See also Figure 2-Figure 6 The slots 24 are distributed in a circular array along the axis of the second rotating rod 18 .

[0048] See also Figure 2-Figure 6 There are two card blocks 21, which are symmetrically arranged on both sides of the cross bar 17. Each card block is connected to the rack plate 20. The two rack plates 20 are respectively engaged with the first gear 19. When the second rotating rod 18 is rotated, the card blocks 21 can be driven to open to both sides or shrink to the middle at the same time, thereby ensuring that the contracted and extended lengths of the card blocks 21 are the same.

[0049] See also Figure 2-Figure 6 The end of the block 21 is arranged to be inclined, so that the block 21 can be more conveniently embedded in the inner wall of the limiting groove 25.

[0050] See also Figure 2-Figure 6 The length between the two ends of the cross bar 17 is smaller than the distance between the two sides of the notch of the groove 4, so the cross bar 17 can be embedded into the inner wall of the groove 4, thereby reducing the moving distance of the slider 2. If the length between the two ends of the cross bar 17 is greater than the distance between the two sides of the notch of the groove 4, the cross bar 17 needs to be tilted to be embedded into the inner wall of the groove 4.

[0051] See also Figure 8-Figure 9The side wall of the threaded sleeve 5 is meshedly connected with a second gear 30, and the second gear 30 is rotatably mounted on the inner wall of the first support device body 1. A sliding plate 29 is provided on the side of the second gear 30 away from the threaded sleeve 5, and the sliding plate 29 is meshedly connected with the second gear 30. A baffle 27 is fixedly mounted on the outer wall of the sliding plate 29, and a fixing rod 28 is fixedly mounted on the side wall of the baffle 27. When the first support device body 1 and the second support device body 26 are attached together, the fixing rod 28 can be passed through the fixing hole, thereby facilitating subsequent fixation.

[0052] The construction method of the open excavation foundation pit reinforcement support device of the power tunnel under the thick silt layer includes the following steps:

[0053] Step 1: Fix the second supporting device body 26 with a crane, and then move it to a designated position. At this time, under the action of the crane, simply align the ends of the second supporting device body 26 and the first supporting device body 1;

[0054] Step 2: Pull the cross bar 17 so that the cross bar 17 rotates correspondingly around the second connecting block 12 until the cross bar 17 is moved to the top of the groove 4, and then the vertical bar 16 is pushed downward so that the vertical bar 16 drives the cross bar 17 to be embedded into the inner wall of the groove 4;

[0055] Step 3: Pull the latch 23 to disengage the latch 23 from the inner wall of the slot 24, then rotate the second rotating rod 18, so that the second rotating rod 18 drives the first gear 19 to rotate, the first gear 19 rotates to drive the rack plate 20 to move, the rack plate 20 moves to drive the block 21 to move, so that the block 21 is embedded in the inner wall of the limiting groove 25, until both ends of the block 21 are respectively in contact with the bottom end of the first supporting device body 1, that is, the connecting plate 15 is at the groove center line of the groove 4, and the latch 23 is re-embedded into the inner wall of the slot 24;

[0056] Step 4: Rotate the control rod 10. The rotation of the control rod 10 drives the second bevel gear 9 to rotate. The rotation of the second bevel gear 9 drives the first bevel gear 8 to rotate. The rotation of the first bevel gear 8 drives the threaded rod 6 to rotate. The rotation of the threaded rod 6 drives the threaded sleeve 5 to slide on the inner wall of the first slide groove 3. The sliding of the threaded sleeve 5 drives the slider 2 to move. When the slider 2 moves, it pulls the first support device body 1 closer and aligns the second support device body 26 with the first support device body 1 until the ends of the second support device body 26 and the first support device body 1 are attached together.

[0057] Step 5: When the ends of the second support device body 26 and the first support device body 1 are fitted together, the threaded sleeve 5 will drive the second gear 30 to rotate, and the rotation of the second gear 30 will drive the sliding plate 29 to move. The movement of the sliding plate 29 will drive the baffle 27 and the fixing rod 28 to pass through the fixing holes on the first fixing plate 31 and the second fixing plate 32. The second support device body 26 and the first support device body 1 are connected with fixing bolts. Finally, the second support device body 26 and the first support device body 1 are placed horizontally on the inner wall of the foundation pit through the length compensation system, thereby supporting the foundation pit.

[0058] The present invention, by setting an adjustment mechanism and a connecting mechanism to cooperate with each other, can control the cross bar 17 through the connecting mechanism when installing the second support device body 26 and the first support device body 1, so that the cross bar 17 is embedded in the inside of the groove 4, and then cooperate with the adjustment mechanism to adjust the position of the second support device body 26 and the first support device body 1, so that the second support device body 26 and the first support device body 1 are aligned, and then the second support device body 26 and the first support device body 1 are connected together by bolts, so as to realize the installation of the second support device body 26 and the first support device body 1, and realize the rapid positioning and precise alignment of the support device during the installation process, without the need for manual heavy position adjustment, which significantly reduces the labor intensity of workers and improves construction efficiency.

[0059] Working principle: Step 1: Fix the second supporting device body 26 with a crane, and then move it to the designated position. At this time, under the action of the crane, simply align the ends of the second supporting device body 26 and the first supporting device body 1;

[0060] Step 2: Pull the cross bar 17 so that the cross bar 17 rotates correspondingly around the second connecting block 12 until the cross bar 17 is moved to the top of the groove 4, and then the vertical bar 16 is pushed downward so that the vertical bar 16 drives the cross bar 17 to be embedded into the inner wall of the groove 4;

[0061] Step 3: Pull the latch 23 to disengage the latch 23 from the inner wall of the slot 24, then rotate the second rotating rod 18, so that the second rotating rod 18 drives the first gear 19 to rotate, the first gear 19 rotates to drive the rack plate 20 to move, the rack plate 20 moves to drive the block 21 to move, so that the block 21 is embedded in the inner wall of the limiting groove 25, until both ends of the block 21 are respectively in contact with the bottom end of the first supporting device body 1, that is, the connecting plate 15 is at the groove center line of the groove 4, and the latch 23 is re-embedded into the inner wall of the slot 24;

[0062] Step 4: Rotate the control rod 10. The rotation of the control rod 10 drives the second bevel gear 9 to rotate. The rotation of the second bevel gear 9 drives the first bevel gear 8 to rotate. The rotation of the first bevel gear 8 drives the threaded rod 6 to rotate. The rotation of the threaded rod 6 drives the threaded sleeve 5 to slide on the inner wall of the first slide groove 3. The sliding of the threaded sleeve 5 drives the slider 2 to move. When the slider 2 moves, it pulls the first support device body 1 closer and aligns the second support device body 26 with the first support device body 1 until the ends of the second support device body 26 and the first support device body 1 are attached together.

[0063] Step 5: When the ends of the second support device body 26 and the first support device body 1 are fitted together, the threaded sleeve 5 will drive the second gear 30 to rotate, and the rotation of the second gear 30 will drive the sliding plate 29 to move. The movement of the sliding plate 29 will drive the baffle 27 and the fixing rod 28 to pass through the fixing holes on the first fixing plate 31 and the second fixing plate 32. The second support device body 26 and the first support device body 1 are connected with fixing bolts. Finally, the second support device body 26 and the first support device body 1 are placed horizontally on the inner wall of the foundation pit through the length compensation system, thereby supporting the foundation pit.

[0064] Other technologies of this embodiment adopt existing technologies.

[0065] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. Open excavation foundation pit reinforcement support device for power tunnel under thick silt layer, characterized by: The invention comprises a first supporting device body (1) and a second supporting device body (26), wherein a slider (2) is arranged at one end of the first supporting device body (1), the slider (2) is embedded in the inner wall of the first slide groove (3), the end of the slider (2) away from the first supporting device body (1) is embedded in the inner wall of the groove (4), the groove (4) is provided at the end of the second supporting device body (26), a control mechanism for controlling the movement of the slider (2) is arranged on the side of the slider (2) close to the first slide groove (3), and the slider (2) is provided with a control mechanism for controlling the movement of the slider (2). 2) A cross bar (17) is provided on one side close to the groove (4), the cross bar (17) is embedded in the inner wall of the groove (4), the cross bar (17) is connected to the slider (2) via a connecting mechanism, an adjustment mechanism for maintaining the second supporting device body (26) and the first supporting device body (1) in docking and alignment is provided on the inner wall of the cross bar (17), a first fixing plate (31) is fixedly mounted on the end of the second supporting device body (26), and a second fixing plate (32) is fixedly mounted on the end of the first supporting device body (1); The control mechanism comprises a threaded sleeve (5) fixedly mounted on one side of the slider (2), the threaded sleeve (5) being slidably mounted on the inner wall of the first slide groove (3), the inner wall of the threaded sleeve (5) being threadedly connected with a threaded rod (6), one end of the threaded rod (6) being connected to the inner wall of the first slide groove (3), the other end of the threaded rod (6) being rotatably connected with a fixed block (7), the fixed block (7) being fixedly mounted on the inner wall of the first slide groove (3), the threaded rod (6) being placed on the outer wall of the inner wall of the fixed block (7) and being fixedly mounted with a first bevel gear (8), one side of the first bevel gear (8) being meshingly connected with a second bevel gear (9), a control rod (10) being fixedly mounted on a side of the second bevel gear (9) away from the first bevel gear (8), the control rod (10) passing through the fixed block (7) and the first support device body (1) and extending to one side of the first support device body (1); The connection mechanism comprises a first connection block (11) arranged at the end of the slider (2); a second connection block (12) is rotatably mounted on the inner wall of the first connection block (11); third connection blocks (13) are rotatably mounted on the other two sides of the outer wall of the second connection block (12); a first rotating rod (14) is fixedly mounted on one end of the third connection block (13) away from the second connection block (12); a connecting plate (15) is rotatably mounted on the outer wall of the first rotating rod (14); a vertical rod (16) is slidably mounted on the inner wall of the connecting plate (15); and a horizontal rod (17) is fixedly mounted on the bottom end of the vertical rod (16).

2. The open excavation foundation pit reinforcement support device for power tunnel under thick silt layer according to claim 1 is characterized by: The adjustment mechanism comprises a clamping block (21) arranged on the inner wall of the cross bar (17); a rack plate (20) is fixedly mounted on one side of the clamping block (21) close to the cross bar (17); a first gear (19) is meshedly connected to one side of the rack plate (20); a second rotating rod (18) is fixedly mounted on the top of the first gear (19); the second rotating rod (18) passes through the cross bar (17) and the vertical rod (16) and extends to the top of the vertical rod (16); a side of the clamping block (21) away from the cross bar (17) is embedded in the inner wall of a limiting groove (25); and the limiting groove (25) is provided on both sides of the bottom of the groove (4).

3. The open excavation foundation pit reinforcement support device for power tunnel under thick silt layer according to claim 2 is characterized by: A fourth connecting block (22) is fixedly mounted on the outer wall of the second rotating rod (18), a latch (23) is slidably mounted on the top of the fourth connecting block (22), and the latch (23) is embedded in the inner wall of a slot (24), and the slot (24) is provided at the top of the vertical rod (16).

4. The open excavation foundation pit reinforcement support device for a power tunnel under a thick silt layer according to claim 3 is characterized by: The clamping grooves (24) are distributed in a circular array along the axis of the second rotating rod (18).

5. The open excavation foundation pit reinforcement support device for power tunnel under thick silt layer according to claim 4 is characterized by: Two clamping blocks (21) are provided, and the two clamping blocks (21) are symmetrically arranged on both sides of the crossbar (17), each of the clamping blocks is connected to the rack plate (20), and the two rack plates (20) are respectively meshed with the first gear (19).

6. The open excavation foundation pit reinforcement support device for power tunnel under thick silt layer according to claim 5 is characterized by: The end of the clamping block (21) is arranged in an inclined shape.

7. The open excavation foundation pit reinforcement support device for power tunnel under thick silt layer according to claim 6 is characterized by: The length between the two ends of the crossbar (17) is smaller than the distance between the two sides of the notch of the groove (4); the side wall of the threaded sleeve (5) is meshedly connected with a second gear (30), the second gear (30) is rotatably mounted on the inner wall of the first supporting device body (1), a sliding plate (29) is provided on the side of the second gear (30) away from the threaded sleeve (5), the sliding plate (29) is meshedly connected with the second gear (30), a baffle (27) is fixedly mounted on the outer wall of the sliding plate (29), and a fixing rod (28) is fixedly mounted on the side wall of the baffle (27).

8. A construction method for an open excavation foundation pit reinforcement support device for an electric power tunnel under a thick silt layer, using the open excavation foundation pit reinforcement support device for an electric power tunnel under a thick silt layer as claimed in claim 7, characterized in that: The following steps are involved: Step 1: Fix the second supporting device body (26) with a crane and then move it to a designated position. At this time, under the action of the crane, simply align the ends of the second supporting device body (26) and the first supporting device body (1); Step 2: Pull the cross bar (17) so that the cross bar (17) rotates correspondingly around the second connecting block (12) until the cross bar (17) is moved to the top of the groove (4), and after being accommodated, the vertical bar (16) is pushed downward so that the vertical bar (16) drives the cross bar (17) to be embedded in the inner wall of the groove (4); Step 3: Pull the latch (23) so that the latch (23) is disengaged from the inner wall of the slot (24), and then rotate the second rotating rod (18) so that the second rotating rod (18) drives the first gear (19) to rotate, and the first gear (19) drives the rack plate (20) to move, and the rack plate (20) drives the block (21) to move, so that the block (21) is embedded in the inner wall of the limiting slot (25) until the two ends of the block (21) are respectively in contact with the bottom end of the first supporting device body (1), that is, the connecting plate (15) is at the center line of the groove (4), and the latch (23) is re-embedded in the inner wall of the slot (24); Step 4: Rotate the control rod (10), the control rod (10) drives the second bevel gear (9) to rotate, the second bevel gear (9) drives the first bevel gear (8) to rotate, the first bevel gear (8) drives the threaded rod (6) to rotate, the threaded rod (6) drives the threaded sleeve (5) to slide on the inner wall of the first slide groove (3), the threaded sleeve (5) slides and drives the slider (2) to move, when the slider (2) moves, it pulls the first support device body (1) closer, and makes the second support device body (26) and the first support device body (1) aligned, until the ends of the second support device body (26) and the first support device body (1) fit together; Step 5: When the ends of the second supporting device body (26) and the first supporting device body (1) are fitted together, the threaded sleeve (5) drives the second gear (30) to rotate, and the rotation of the second gear (30) drives the sliding plate (29) to move, and the movement of the sliding plate (29) drives the baffle (27) and the fixing rod (28) to pass through the fixing holes on the first fixing plate (31) and the second fixing plate (32), and the second supporting device body (26) and the first supporting device body (1) are connected by fixing bolts. Finally, the second supporting device body (26) and the first supporting device body (1) are placed horizontally on the inner wall of the foundation pit through the length compensation system, thereby supporting the foundation pit.

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