A high-efficiency construction method and device for underground pile-connected wall

Abstract

The present application relates to an efficient construction method and device for underground pile-connected walls, including ground leveling and measurement; digging shallow trenches and constructing guide walls; injecting mud into shallow trenches to set up unit wall sections; digging deep grooves at the bottom of the shallow trenches, with the length of the deep grooves being one unit wall section; placing steel cages, and setting joints on both sides of the deep grooves; placing the conduit by a conduit lifting mechanism, and lifting the conduit while pouring concrete; maintenance, and removing the joints after the concrete solidifies; repeating the above corresponding steps to construct unit wall sections at intervals of one unit wall section; and constructing unit wall sections between two already formed concrete walls. In this solution, no additional personnel are required to support the unit pipes below during installation and removal of the unit pipes, making the operation convenient. One person can manage the installation of one unit pipe, saving manpower and time. The two conduits are simultaneously sunk and lifted by mechanical clamping, which saves time and effort, and prevents precision and is not easy to tilt.

Description

Technical Field

[0001] The present application relates to the field of building foundation construction, and in particular to a high-efficiency construction method and device for underground pile-connected walls. Background Art

[0002] Continuous wall, also known as underground continuous wall, is a foundation project that uses a trenching machine to dig a deep trench along the peripheral axis of the deep excavation project under the condition of mud wall protection. A steel cage is suspended in the trench, and then underwater concrete is poured using the conduit method to build a unit wall section. This is done section by section to build a continuous reinforced concrete wall underground as a water-stop curtain and support bearing structure.

[0003] The construction steps of underground pile continuous wall are as follows: 1. Level the site and dig a shallow guide trench; 2. Construct a guide wall; 3. Prepare mud and inject the mud into the shallow guide trench; 4. Dig a unit deep trench at the bottom of the shallow guide trench; 5. Place a pre-made steel cage in the deep trench; 6. Pour concrete into the deep trench using the conduit method to complete a unit wall section, and each unit wall section is connected to each other by joints.

[0004] However, when pouring concrete using the conduit method, the conduit needs to rise with the rise of the concrete sheet. Patent No. CN217627196U discloses a conduit lifting device for underground continuous wall concrete pouring. When the device is used, since two conduits are usually provided, the conduits need to be lifted and installed one by one, and the conduit lifting device for underground continuous wall concrete pouring also needs to be moved, which is troublesome, time-consuming and labor-intensive, and affects construction efficiency. Summary of the invention

[0005] In order to improve construction efficiency, the present application provides an efficient construction method and device for an underground pile-connected wall.

[0006] In the first aspect, the present application provides an efficient construction method for underground pile-connected walls, which adopts the following technical solutions:

[0007] An efficient construction method for underground pile-connected walls comprises the following steps:

[0008] S1, ground leveling and measurement;

[0009] S2, digging shallow trenches and constructing guide walls;

[0010] S3, inject mud into the shallow trench and set the unit wall section;

[0011] S4, a deep trench is excavated at the bottom of the shallow trench, and the length of the deep trench is one unit wall section;

[0012] S5, placing the steel cage and setting joints on both sides of the deep groove;

[0013] S6, two conduits are provided, concrete is poured through the two conduits at the same time, and when the concrete is poured to a certain height, the conduits are lifted upward; and a conduit lifting mechanism is also included, and the conduit is lowered and lifted by the conduit lifting mechanism;

[0014] S7, curing, removing the joints after the concrete solidifies to form a concrete wall a;

[0015] S8, repeating steps S4-S7 to construct the unit wall segments at intervals of one unit wall segment to form a concrete wall b;

[0016] S9, after digging a deep trench for the unit wall section between concrete wall a and concrete wall b, use a wall scraper to remove the mud and sand on the opposite side walls of concrete wall a and concrete wall b, then lower the steel cage, install the conduit and pour the concrete, and after solidification, form concrete wall c. In the same way, complete the construction of the entire underground continuous wall.

[0017] By adopting the above technical solution, the conduit lifting mechanism completes the efficient construction of the underground pile-connected wall, making the construction convenient, reducing manual operations, saving time and labor.

[0018] In a second aspect, the present application provides a device for an efficient construction method of underground pile-connected walls, including the following technical solutions:

[0019] An apparatus for the above-mentioned efficient construction method of underground pile-connected wall, in step S6, the conduit includes a plurality of unit tubes with detachable ends; the conduit lifting mechanism includes a base plate, a mounting seat, a tube clamping structure on the mounting seat and a lifting drive assembly for driving the mounting seat to slide vertically; the base plate is mounted on the guide walls on both sides of the shallow ditch, and the base plate is provided with tube holes for the conduits to pass through; the tube clamping structure is used to clamp or release two conduits at the same time, and when the tube clamping structure clamps the conduit, the lifting drive assembly drives the mounting seat to slide vertically, so that the conduit moves vertically, and the conduit is installed and removed.

[0020] By adopting the above technical solution, before pouring concrete, the conduit is installed through the conduit lifting mechanism. When in use, the bottom plate is erected on the guide walls on both sides of the shallow ditch, and then the mounting seat is adjusted to a low position. The pipe clamping structure clamps the top of a unit pipe, and there is no need to manually hold the conduit below. The worker connects another unit pipe at the top of the unit pipe, and then the pipe clamping structure releases the conduit, and the mounting seat moves up to the top of the upper unit pipe and clamps it. The lifting drive assembly drives the mounting seat to slide down, so that the conduit sinks, and then the worker continues to install the next unit pipe above the unit pipe. On the one hand, when the two unit pipes are connected, the bottom unit pipe is clamped and kept stable, which is convenient for connecting the two unit pipes; on the other hand, there is no need to manually sink the conduit, which is more labor-saving, and the two conduits are lifted at the same time, without the need to lift them one by one, saving time. And the mechanical vertical force is applied to the conduit, so that the conduit is not easy to tilt when sinking.

[0021] When pouring concrete, the pipe clamping structure clamps the top of the conduit. When the concrete covers a certain distance above the bottom of the conduit, the lifting drive assembly drives the mounting seat to rise to raise the top of the conduit. Then, the pipe clamping structure releases the conduit and slides down to a low position to clamp the top of the unit pipe below. Workers remove the upper unit pipe and continue pouring. On the one hand, it makes it easy to disassemble the two unit pipes, and on the other hand, there is no need to manually pull up the conduit. After pouring concrete, since the consistency of concrete is greater than that of mud, greater force is required to pull out the conduit. The pipe clamping structure cooperates with the lifting drive assembly to make the conduit rise after mechanical clamping, saving time and effort.

[0022] Optionally, the tube clamping structure includes two parallel moving rods, a clamping portion arranged on the moving rods, and a clamping drive assembly for driving the two moving rods to slide; the two moving rods have the same height, the moving directions of the two moving rods are along their own length directions, and the moving directions of the two moving rods are opposite; each moving rod is provided with two clamping portions, and the clamping portions on the two moving rods correspond to each other one by one;

[0023] When the two moving rods slide away from each other, the two corresponding clamping parts move away from each other; when the two moving rods slide toward each other, the two corresponding clamping parts move toward each other to clamp the catheter;

[0024] The mounting seat is provided with a clamping groove for the catheter to pass through, and the clamping groove is located between two corresponding clamping parts.

[0025] By adopting the above technical solution, the two movable rods slide, so that the corresponding two clamping parts move away from or close to each other, thereby achieving the simultaneous clamping and simultaneous release of the two catheters. If more catheters need to be clamped, it is only necessary to add clamping parts on the sliding rod, which is convenient for construction. The two catheters are clamped and released at the same time, so that the moving distance of the two catheters is the same, and it is not easy to have the problem of a large difference in the concrete liquid level on both sides of the deep groove due to the different depths of the two catheters inserted into the deep groove. The clamping groove is located between the two corresponding clamping parts, so that the catheter can be clamped conveniently after the two clamps are not close.

[0026] Optionally, the clamping drive assembly includes gears and a clamping motor, the two moving rods are provided with teeth, the teeth on the two moving rods are engaged with the opposite sides of the gears, the clamping motor is arranged on the mounting seat, and the clamping motor drives the gears to rotate to drive the two moving rods to slide closer to each other or away from each other.

[0027] By adopting the above technical solution, since the teeth of the two moving rods are engaged at the opposite ends of the gear, the clamping motor drives the gear to rotate, and the two moving rods achieve sliding at the same speed and in opposite directions. It is convenient to use the same driving source to drive the two moving rods to slide at the same time, and the sliding speed is exactly the same, which saves costs and has a good implementation effect.

[0028] Optionally, a mounting cavity for the sliding movement of the moving rod is provided in the mounting seat, two slide rails are provided in the mounting cavity, and sliders are provided on the two moving rods, and the sliders are slidably connected to the slide rails.

[0029] By adopting the above technical solution and arranging the slide rail and the sliding block, the sliding rod can slide smoothly.

[0030] Optionally, the lifting drive assembly includes two lifting screws and two lifting motors that drive the lifting screws to rotate. The length direction of the lifting screws is vertical, the bottom end of the lifting screws is rotatably connected to the base plate, and the two lifting screws are threadedly connected to both ends of the length direction of the mounting seat.

[0031] By adopting the above technical solution, the lifting screw is rotated to drive the mounting seat to rise or fall, which is more convenient.

[0032] Optionally, the lifting drive assembly includes two sets of pulley assemblies, the pulley assembly includes two transmission wheels and a belt tensioned to connect the two transmission wheels, one transmission wheel is coaxially connected to the bottom end of the lifting screw rod, and the other transmission wheel is connected to the motor shaft of the lifting motor.

[0033] By adopting the above technical solution and using a pulley assembly, the lifting motor can be conveniently installed on the top of the base plate, providing a larger installation space.

[0034] Optionally, a support frame is fixed to the base plate, the support frame includes a horizontal plate and a vertical plate, a first bearing seat is arranged on the horizontal plate, the lifting screw rod is rotatably connected to the horizontal plate through the first bearing seat, and the vertical plate supports the horizontal plate above the two transmission wheels; the lifting motor is fixed to the top of the horizontal plate, and the motor shaft of the lifting motor passes downward through the horizontal plate to connect to the transmission wheel.

[0035] By adopting the above technical solution, the support frame is set up to facilitate the installation of the lifting screw and the lifting motor. Since the lifting screw is relatively high, if the bottom end of the lifting screw is used as a support point for rotation connection, the stress on the connection is relatively large, making the screw rotation stability poor. The setting of the horizontal plate facilitates the lifting screw to be rotated near its middle part, rather than at the bottom end, so that the rotation of the lifting screw is more stable.

[0036] Optionally, a protective shell is fixed on the base plate, the lifting motor, pulley assembly and support frame are arranged in the protective shell, a second bearing seat is arranged on the top of the protective shell, and the bottom of the lifting screw rod is also rotatably connected to the protective shell through the second bearing seat.

[0037] By adopting the above technical solution, since there is a lot of dust, gravel and debris at the construction site, which easily affects the transmission and service life of the pulley structure, the protective shell sets the lifting motor, pulley assembly and support frame cover inside for protection, making the components not easy to be damaged. In addition, a second bearing seat is set on the top of the protective shell, so that the lifting screw rod is connected in two-stage rotation, which further improves the connection stability of the lifting screw rod and makes it difficult to shake when rotating.

[0038] Optionally, pile holes are provided at both ends of the bottom plate, and fixing piles are provided in the pile holes. The fixing piles are used to be nailed into the ground to fix the bottom plate.

[0039] By adopting the above technical solution, the bottom plate is fixed into the ground by means of fixed piles, so that the bottom plate is not easily displaced and the construction is stable.

[0040] In summary, the present application includes at least one of the following beneficial technical effects:

[0041] 1. The catheter lifting mechanism is used to sink and lift the catheter. There is no need for manual force to sink and lift the catheter. When the unit pipe is connected and removed, the clamping structure clamps the unit pipe below. There is no need for manual support, which saves labor. One person can operate it, and the construction is easy. Two catheters sink and lift at the same time, saving time.

[0042] 2. The gear drives two moving rods to slide simultaneously, which is convenient for controlling the clamping and release of two catheters at the same time. The structure is simple and cost-saving.

[0043] 3. The lifting screw is connected by two bearing seats, which has good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a flow chart of the efficient construction method of underground pile continuous wall.

[0045] Figure 2 It is a disassembled view of the catheter of the embodiment, mainly showing the structure of the unit tube.

[0046] Figure 3 This is an overall diagram of the guide tube lifting mechanism of the underground pile continuous wall high-efficiency construction method device Figure 1 .

[0047] Figure 4 It is a partial display diagram of the top of the catheter lifting mechanism, mainly showing the structure inside the mounting base and the structure inside the protective shell.

[0048] Figure 5 This is the overall schematic diagram of the catheter lifting mechanism Figure 2 , mainly showing the structure at the bottom of the base plate.

[0049] Figure 6It is a diagram showing the structure inside the installation cavity and the protective shell.

[0050] Figure 7 yes Figure 6 A magnified view of the slide, rail and gear.

[0051] Explanation of the reference numerals: 1. shallow groove; 11. guide wall; 12. deep groove; 2. joint pipe; 3. catheter; 31. unit pipe; 4. catheter lifting mechanism; 41. bottom plate; 411. pipe hole; 412. pile hole; 413. fixed pile; 414. universal wheel; 42. mounting seat; 421. clamping groove; 422. mounting cavity; 423. slider; 424. slide rail; 43. pipe clamping structure; 431. moving rod; 432. clamping part; 433. clamping drive assembly; 4331. gear; 4332. clamping motor; 44. lifting drive assembly; 441. lifting screw rod; 442. lifting motor; 443. pulley assembly; 4431. transmission wheel; 4432. belt; 5. support frame; 51. horizontal plate; 52. vertical plate; 53. first bearing seat; 6. protective shell; 61. second bearing seat; 7. gasket. DETAILED DESCRIPTION

[0052] The present application is further described in detail below in conjunction with the accompanying drawings.

[0053] The present application embodiment discloses an efficient construction method for underground pile-connected walls. Figure 1 , Figure 2 and Figure 3 The efficient construction method of underground pile continuous wall includes the following steps:

[0054] S1, remove ground gravel, level the ground, measure and divide the trenching area;

[0055] S2, dig a shallow trench 1 with a depth of 1.5m, tie the steel bars of the guide wall 11, build formwork on both sides of the inner wall of the shallow trench 1 and pour concrete, and form the guide wall 11 after solidification;

[0056] S3, inject mud into shallow trench 1 and mark the unit wall section;

[0057] S4, a deep trench 12 is excavated at the bottom of the shallow trench 1. The length of the deep trench 12 is one unit wall section. The two sides and the middle of the deep trench 12 are first excavated with a rotary drilling rig, and then the remaining mud residue in the middle is grabbed with a continuous wall grab;

[0058] S5, placing the steel cage, and setting joints on both sides of the deep groove 12, the joints are joint pipes 2;

[0059] S6, two conduits 3 are set, the conduits 3 are spaced 1-1.5m apart from the side wall of the deep groove 12, and the bottom of the conduits 3 is spaced 30-50cm apart from the bottom of the deep groove 12. Concrete is poured through the two conduits 3 at the same time. When the concrete is poured to a certain height, the conduits 3 are lifted upward to keep the bottom of the conduits 3 buried 2-4m below the concrete liquid surface;

[0060] S7, curing, after the concrete solidifies, the joint pipe 2 is removed to form a concrete wall a;

[0061] S8, repeating steps S4-S7 to construct the unit wall segments at intervals of one unit wall segment to form a concrete wall b;

[0062] S9, after digging a deep trench 12 for the unit wall section between concrete wall a and concrete wall b, use a wall scraper to remove the mud and sand on the opposite side walls of concrete wall a and concrete wall b, then lower the steel cage, install the conduit 3 and pour concrete, and after solidification, form concrete wall c, and complete the construction of the entire underground continuous wall in the same way.

[0063] The present application also discloses a device for an efficient construction method of underground pile-connected wall, referring to Figure 3 , Figure 4 In step S6 of the above-mentioned high-efficiency construction method for underground pile continuous wall, the conduit 3 includes a plurality of unit tubes 31 with detachable ends. Step S6 of the high-efficiency construction method for underground pile continuous wall also includes a conduit lifting mechanism 4, which is used for lowering the conduit 3 before concrete pouring and lifting the conduit 3 during concrete pouring.

[0064] Reference Figure 5 , Figure 6 The catheter lifting mechanism 4 includes a base plate 41, a mounting seat 42, a tube clamping structure 43 on the mounting seat 42, and a lifting driving assembly 44 for driving the mounting seat 42 to slide vertically.

[0065] Reference Figure 3 , Figure 5 The bottom plate 41 is erected on the guide walls 11 on both sides of the shallow trench 1. Two pipe holes 411 are opened in the middle of the bottom plate 41 for the conduit 3 to pass through. The projection of the pipe holes 411 in the vertical direction is located in the shallow trench 1. A number of pile holes 412 are opened at the edges of both ends of the bottom plate 41. The pile holes 412 are plugged with fixed piles 413 one by one. The fixed piles 413 are used to be nailed into the ground to fix the bottom plate 41. A number of universal wheels 414 are installed at the bottom of both ends of the bottom plate 41 to facilitate the movement of the bottom plate 41. After the bottom plate 41 moves to the corresponding position, grooves are first dug at the bottom of the universal wheels 414 so that the two ends of the bottom plate 41 are erected on the top surface of the guide wall 11. At this time, the universal wheels 414 are not subjected to force, and then the fixed piles 413 are nailed in, and the universal wheels 414 are not easily damaged.

[0066] Reference Figure 5 , Figure 6The lifting drive assembly 44 includes two lifting screws 441 and two lifting motors 442 that drive the lifting screws 441 to rotate. The length direction of the lifting screws 441 is the vertical direction. The bottom end of the lifting screws 441 is rotatably connected to the bottom plate 41, and the two lifting screws 441 are threadedly connected to the two ends of the mounting seat 42 in the length direction.

[0067] Reference Figure 6 The lifting drive assembly 44 also includes two sets of pulley assemblies 443 corresponding to the two lifting screw rods 441, and the lifting motor 442 drives the lifting screw rods 441 to rotate through the pulley assemblies 443. The pulley assembly 443 includes two transmission wheels 4431 and a belt 4432 that is tensioned to connect the two transmission wheels 4431. One transmission wheel 4431 is coaxially connected to the bottom end of the lifting screw rod 441, and the other transmission wheel 4431 is connected to the motor shaft of the lifting motor 442.

[0068] Reference Figure 6 A support frame 5 is fixed on the bottom plate 41, and the support frame 5 includes a horizontal plate 51 and two vertical plates 52. The bottom end of the vertical plate 52 is fixed on the bottom plate 41, and two driving wheels 4431 of the same pulley assembly 443 are located between the two vertical plates 52, so that the vertical plate 52 supports the horizontal plate 51 above the two driving wheels 4431. A first bearing seat 53 is installed on the horizontal plate 51, and the lifting screw rod 441 is rotatably connected to the horizontal plate 51 through the first bearing seat 53. The lifting motor 442 is fixed on the top of the horizontal plate 51, and the motor shaft of the lifting motor 442 passes through the horizontal plate 51 downward to connect the driving wheel 4431.

[0069] Reference Figure 5 A protective housing 6 is fixed on the bottom plate 41, the outer box of the protective housing 6, the lifting motor 442, the pulley assembly 443 and the support frame 5 are located in the protective housing 6, the top of the protective housing 6 is provided with a second bearing seat 61, and the bottom of the lifting screw rod 441 is also rotatably connected to the protective housing 6 through the second bearing seat 61. The lifting screw rod 441 is rotatably connected through the two bearing seats, so that the lifting screw rod 441 rotates more stably.

[0070] Reference Figure 6 The tube clamping structure 43 is used to clamp or release two conduits 3 at the same time. When the tube clamping structure 43 clamps the conduit 3, the lifting drive assembly 44 drives the mounting seat 42 to slide vertically, so that the conduit 3 moves vertically, and the conduit 3 is installed and removed.

[0071] Reference Figure 6 , Figure 7The tube clamping structure 43 includes two parallel moving rods 431, a clamping portion 432 disposed on the moving rods 431, and a clamping driving assembly 433 for driving the two moving rods 431 to slide. The mounting seat 42 is provided with two clamping grooves 421 for the conduit 3 to vertically pass through. The mounting seat 42 is also provided with a mounting cavity 422. The moving rods 431 are slidably connected to the mounting cavity 422, and two slide rails 424 are fixed in the mounting cavity 422. A slider 423 is fixed at the bottom of the two moving rods 431, and the slider 423 is slidably connected to the slide rail 424.

[0072] Reference Figure 6 , Figure 7 The two moving rods 431 have the same horizontal height, the moving directions of the two moving rods 431 are along their own length directions, and the sliding direction of the moving rods 431 is along the arrangement direction of the two clamping grooves 421. The moving directions of the two moving rods 431 are opposite. Two clamping parts 432 are provided on each moving rod 431, and the two clamping grooves 421 are located between the two moving rods 431, and the clamping groove 421 is also located between two corresponding clamping parts 432.

[0073] Reference Figure 6 , Figure 7 , the clamping parts 432 on the two moving rods 431 correspond to each other. When the two moving rods 431 slide away from each other, the corresponding two clamping parts 432 move away from each other. When the two moving rods 431 slide toward each other, the two corresponding clamping parts 432 simultaneously approach the clamping groove 421, thereby clamping the catheter 3 located in the clamping groove 421.

[0074] Reference Figure 6 , Figure 7 The clamping drive assembly 433 includes a gear 4331 and a clamping motor 4332. The two moving rods 431 have teeth integrally formed on opposite side walls. The teeth on the two moving rods 431 mesh with opposite sides of the gear 4331. The clamping motor 4332 is fixed to the top surface of the mounting seat 42. The motor shaft of the clamping motor 4332 passes downward through the inner wall of the mounting cavity 422 to coaxially fix the gear 4331. The clamping motor 4332 drives the gear 4331 to rotate to drive the two moving rods 431 to synchronously move closer to each other or away from each other.

[0075] Reference Figure 6 The inner walls of the two corresponding clamping parts 432 are arc surfaces, so that the outer wall of the conduit 3 is subjected to force more evenly and is not easily deformed. A gasket 7 is fixed on the arc surface. The gasket 7 is a metal sheet with a certain ductility to prevent the clamping part 432 from being worn, and at the same time facilitates the circumferential force of the conduit 3, and the clamping effect is good.

[0076] The implementation principle of an efficient construction method for underground pile-connected walls and the device thereof according to an embodiment of the present application is as follows: the main steps are ground leveling and measurement; excavating a shallow trench 1 and constructing a guide wall 11; injecting mud into the shallow trench 1 and setting a unit wall segment; excavating a deep trench 12 at the bottom of the shallow trench 1, with the length of the deep trench 12 being one unit wall segment; placing a steel cage and setting joints on both sides of the deep trench 12; setting two guide tubes 3 and pouring concrete; maintaining and removing the joints after the concrete solidifies; repeating steps S4-S7 to construct the unit wall segment at a distance of one unit wall segment; and constructing the unit wall segment between two already formed concrete walls.

[0077] The present application scheme mainly adopts the catheter lifting mechanism 4 to operate during the sinking and lifting stages of the catheter 3. When in use, the base plate 41 is fixed to the ground, and then the two starting unit tubes 31 are kept vertical and passed through the two clamping grooves 421 and the tube hole 411 in sequence, and then the clamping motor 4332 drives the two moving rods 431 to slide, and the two groups of clamping parts 432 clamp the top of the starting unit tube 31, and the worker connects and fixes the second unit tube 31 at the top of the starting unit tube 31, and then the worker holds the two second unit tubes 31. After the mounting seat 42 is driven to rise by the lifting drive component 44, the pipe clamping structure 43 clamps the top of the second unit tube 31, and the lifting drive component 44 drives the mounting seat 42 to move downward, so that the two second unit tubes 31 move downward, and then the worker fixes and connects the third unit tube 31 at the top of the two second unit tubes 31, and the operation is repeated to achieve the installation of the catheter 3. During the installation phase of the unit pipe 31 , no additional personnel are required to support the unit pipe 31 below, so the operation is convenient. One person only needs to manage the installation of one unit pipe 31 , saving manpower and time.

[0078] When pouring concrete, the conduit 3 needs to be lifted. When in use, the pipe clamping structure 43 clamps the top of the conduit 3. After manually judging that the concrete has passed the bottom of the conduit 3 by a certain distance, the lifting drive assembly 44 drives the mounting seat 42 to rise so that the top of the conduit 3 rises. Then, the pipe clamping structure 43 releases the conduit 3, slides down to a low position and clamps the top of the unit pipe 31 below. The worker disassembles the upper unit pipe 31 and continues pouring. When the unit pipe 31 is disassembled, no additional personnel is required to support the conduit 3, which makes it convenient to disassemble the two unit pipes 31. On the other hand, there is no need to manually pull up the conduit 3. After the concrete is poured, since the consistency of the concrete is greater than that of the mud, a greater force is required to pull out the conduit 3. The pipe clamping structure 43 cooperates with the lifting drive assembly 44 to make the conduit 3 rise after mechanical clamping, saving time and effort.

[0079] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An efficient construction method for underground pile-connected walls, characterized in that: The steps include: S1, ground leveling and measurement; S2, digging a shallow trench (1) and constructing a guide wall (11); S3, injecting mud into the shallow trench (1) to set up the unit wall section; S4, a deep trench (12) is excavated at the bottom of the shallow trench (1), and the length of the deep trench (12) is one unit wall segment; S5, placing the steel cage and setting joints on both sides of the deep groove (12); S6, two conduits (3) are provided, concrete is poured through the two conduits (3) at the same time, and when the concrete is poured to a certain height, the conduits (3) are lifted upward; and a conduit lifting mechanism is also included, and the conduit lifting mechanism is used to perform sinking and lifting operations on the conduits; S7, curing, removing the joints after the concrete solidifies to form a concrete wall a; S8, repeating steps S4-S7 to construct the unit wall segments at intervals of one unit wall segment to form a concrete wall b; S9, after digging a deep trench (12) for the unit wall section between concrete wall a and concrete wall b, use a wall scraper to remove the mud and sand on the opposite side walls of concrete wall a and concrete wall b, then lower the steel cage, install the guide tube (3) and pour the concrete, and after solidification, form concrete wall c. In the same way, complete the construction of the entire underground continuous wall; In step S6, the catheter (3) includes a plurality of unit tubes (31) whose ends are detachably connected; and also includes a catheter lifting mechanism (4), the catheter lifting mechanism (4) including a base plate (41), a mounting seat (42), a tube clamping structure (43) on the mounting seat (42), and a lifting drive assembly (44) for driving the mounting seat (42) to slide vertically; the base plate (41) is mounted on the guide walls (11) on both sides of the shallow groove (1), and a tube hole (411) for the catheter (3) to pass through is opened on the base plate (41); the tube clamping structure (43) is used to clamp or release two catheters (3) at the same time, and when the tube clamping structure (43) clamps the catheter (3), the lifting drive assembly (44) drives the mounting seat (42) to slide vertically, so that the catheter (3) moves vertically, and the catheter (3) is installed and removed; The tube clamping structure (43) comprises two parallel moving rods (431), a clamping portion (432) arranged on the moving rods (431) and a clamping driving assembly (433) for driving the two moving rods (431) to slide; the two moving rods (431) have the same height, the moving directions of the two moving rods (431) are along their own length directions, and the moving directions of the two moving rods (431) are opposite; there are two clamping portions (432) on each moving rod (431), and the clamping portions (432) on the two moving rods (431) correspond to each other one by one; When the two moving rods (431) slide away from each other, the two corresponding clamping portions (432) move away from each other; when the two moving rods (431) slide toward each other, the two corresponding clamping portions (432) move toward each other to clamp the catheter (3); The mounting seat (42) is provided with a clamping groove (421) for the conduit (3) to pass through, and the clamping groove (421) is located between two corresponding clamping portions (432); The clamping drive assembly (433) comprises a gear (4331) and a clamping motor (4332). The two moving rods (431) are provided with teeth, and the teeth on the two moving rods (431) are meshed with the gears (4331) on opposite sides. The clamping motor (4332) is arranged on the mounting seat (42). The clamping motor (4332) drives the gear (4331) to rotate so as to drive the two moving rods (431) to slide closer to each other or away from each other. The lifting drive assembly (44) comprises two lifting screw rods (441) and two lifting motors (442) for driving the lifting screw rods (441) to rotate. The length direction of the lifting screw rods (441) is the vertical direction. The bottom end of the lifting screw rods (441) is rotatably connected to the bottom plate (41). The two lifting screw rods (441) are threadedly connected to the two ends of the mounting seat (42) in the length direction.

2. The device for the high-efficiency construction method of underground pile-connected wall according to claim 1 is characterized in that: The mounting seat (42) is provided with a mounting cavity (422) for the moving rod (431) to slide, and two slide rails (424) are provided in the mounting cavity (422). Slide blocks (423) are provided on the two moving rods (431), and the slide blocks (423) are slidably connected to the slide rails (424).

3. The device for the high-efficiency construction method of underground pile-connected wall according to claim 2 is characterized in that: The lifting drive assembly (44) includes two sets of pulley assemblies (443), the pulley assembly (443) includes two transmission wheels (4431) and a belt (4432) tensioned to connect the two transmission wheels (4431), one transmission wheel (4431) is coaxially connected to the bottom end of the lifting screw rod (441), and the other transmission wheel (4431) is connected to the motor shaft of the lifting motor (442).

4. The device for the high-efficiency construction method of underground pile-connected wall according to claim 3 is characterized in that: A support frame (5) is fixed on the bottom plate (41), and the support frame (5) includes a transverse plate (51) and a vertical plate (52). A first bearing seat (53) is arranged on the transverse plate (51), and the lifting screw rod (441) is rotatably connected to the transverse plate (51) through the first bearing seat (53). The vertical plate (52) supports the transverse plate (51) above the two transmission wheels (4431); the lifting motor (442) is fixed on the top of the transverse plate (51), and the motor shaft of the lifting motor (442) passes through the transverse plate (51) downward to connect to the transmission wheel (4431).

5. The device for the high-efficiency construction method of underground pile-connected wall according to claim 4 is characterized in that: A protective shell (6) is fixed on the bottom plate (41), a lifting motor (442), a pulley assembly (443) and a support frame (5) are arranged in the protective shell (6), a second bearing seat (61) is arranged on the top of the protective shell (6), and the bottom of the lifting screw rod (441) is also rotatably connected to the protective shell (6) through the second bearing seat (61).

6. The device for the high-efficiency construction method of underground pile-connected wall according to claim 2 is characterized in that: Pile holes (412) are arranged at both ends of the bottom plate (41), and fixing piles (413) are arranged in the pile holes (412). The fixing piles (413) are used to be nailed into the ground to fix the bottom plate (41).

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