Soft soil foundation supporting structure side face grooving device and implementation method
Through the use of the sidelines of the soft land base support structure in the support of the deep -founded pit branch, the side slot on the side of the groove is opened and replenished the concrete material, which solves the problem of insufficient rigidity of the traditional underground wall, and realizes local reinforcement. Economics and efficiency.
Patent Information
- Application Number
- CN202411872962.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-01-28
AI Technical Summary
In deep foundation pit support, the overall strength and wall stiffness of traditional underground continuous walls are insufficient, resulting in deformation and stability problems. Increasing the wall thickness to increase the stiffness will lead to an increase in the amount of concrete material and reduce economicality.
The side slotting device on the side of the soft land -based support structure, including a hanging mechanism, an underground steering mechanism, a spiral movement mechanism, and a excavation mechanism. Supplement concrete materials in the inside and strengthen the wall with local.
This method can make targeted reinforcement at the position that needs to be enhanced, avoid the overall increase of the material waste brought by the thickness of the wall, and at the same time improve the overall stability and resistance of the wall.
Smart Images
Figure CN119373181A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of soft soil foundation support slotting and excavation, and in particular relates to a side slotting device and an implementation method for a soft soil foundation support structure. Background Art
[0002] With the development of water transport and water conservancy project construction, embankments, sluice stations and other structures are increasingly facing soft soil foundations such as waterfront mud. In this process, the demand for deep foundation pit excavation and support for large-scale projects is increasing. The support structure is a measure to support, reinforce and protect the side walls of the foundation pit and the surrounding environment in order to ensure the safety of underground structure construction and the surrounding environment of the foundation pit.
[0003] Underground continuous wall support is a vertical continuous wall support structure, which is formed by digging trenches underground and pouring concrete to form walls. These walls are used to support the soil outside the foundation pit to prevent the surrounding soil from collapsing and groundwater from infiltrating. Due to its fast construction speed, small impact on the surrounding environment, and good waterproof performance, underground continuous walls have been widely used in deep foundation pit support. The overall strength and wall stiffness of traditional underground continuous walls are the key factors that determine the deformation and stability of the support structure, as well as the additional settlement and horizontal deformation caused to the surrounding environment. However, under the requirement of strictly controlling the deformation of the surrounding area, measures that only increase the overall thickness of the wall to reduce the deformation will lead to a significant increase in the amount of concrete materials, thereby reducing the economic efficiency of the underground continuous wall support structure.
[0004] Therefore, how to improve the overall stiffness and strength of the wall, develop a new method of side grooving of the underground continuous wall, and locally increase the wall thickness or change the shape where the stiffness needs to be increased have become technical problems that need to be solved urgently. Summary of the invention
[0005] Purpose of the invention: In order to solve the above problems, the present invention provides a side grooving device and implementation method for a soft soil foundation support structure.
[0006] Technical solution: A side grooving device for a soft soil foundation support structure, comprising: A hoisting mechanism, comprising a crane and a cable lifting assembly provided at an output end of the crane; An underground steering mechanism connected to the output end of the cable lifting assembly; the underground steering mechanism includes at least the following working states: a retracted state and an excavation state; A spiral travel mechanism is arranged on the underground steering mechanism; in the excavation state, the spiral travel mechanism is arranged perpendicular to the side soil of the trench; The excavating mechanism is arranged on the spiral traveling mechanism; under the drive of the spiral traveling mechanism, the excavating mechanism is arranged to rotate and cut the side soil of the groove.
[0007] In a further embodiment, the underground steering mechanism comprises: A bracket, one end of which is provided with a connecting portion connected to the cable lifting assembly; Two sets of slide grooves are arranged on the bracket along the length direction of the bracket; A rotating frame, one end of which is rotatably connected to the support; A mounting frame connected to the other end of the rotating frame; the mounting frame is slidably connected to the slide groove; A driving source, whose output end is connected to the mounting frame; the driving source is used to drive the mounting frame to move on the slideway; A limiting member is arranged at the end of each of the slide slots; the limiting member is used to limit the mounting frame.
[0008] In a further embodiment, the spiral travel mechanism includes: a rotating disk; A housing connected to the output end of the rotating disk; A traveling reel, rotatably connected to the housing; A primary input nut, disposed in the housing and having one end connected to the output end of the traveling reel; A primary travel block, drivingly connected to the primary input nut and slidably connected to the inner wall of the housing; A secondary input nut is disposed in the primary traveling block; one end of the secondary input nut is connected to the other end of the primary input nut and is rotatably connected to the primary traveling block; A secondary traveling block, drivingly connected to the secondary input nut and slidably connected to the inner wall of the primary traveling block; A third-level input nut is disposed in the second-level traveling block; the third-level input nut is connected to the second-level input nut and is rotationally connected to the second-level traveling block; The third-stage advancing block is drivingly connected to the third-stage input nut and slidably connected to the inner wall of the second-stage advancing block.
[0009] In a further embodiment, accommodating spaces are provided between the inner wall of the shell and the outer wall of the first-stage traveling block, between the inner wall of the first-stage traveling block and the outer wall of the second-stage traveling block, and between the inner wall of the second-stage traveling block and the outer wall of the tertiary traveling block.
[0010] In a further embodiment, the excavating mechanism comprises: A plurality of groups of digging pieces are correspondingly arranged on the outer walls of the first-stage traveling block, the second-stage traveling block and the third-stage traveling block; and the digging pieces are correspondingly located in the accommodating space.
[0011] In a further embodiment, the excavating member is a cutter head with an adjustable angle.
[0012] In another technical solution, an implementation method based on the above-mentioned side grooving device of a soft soil foundation support structure is provided, comprising the following steps: Step 1: transport the hoisting mechanism, underground steering mechanism, spiral travel mechanism and excavation mechanism to the construction site and assemble them; Step 2: Use the cable lifting assembly to place the underground steering mechanism, spiral travel mechanism and excavation mechanism into the underground trench; and adjust the horizontal and vertical positions of the underground steering mechanism, spiral travel mechanism and excavation mechanism by the crane and the cable lifting assembly respectively; Step 3: After adjusting the position, the original driving mounting frame is driven to move in the slide slot, and the rotating frame drives the mounting frame to rotate the angle, so that the underground steering mechanism is changed from the retracted state to the excavation state; in the excavation state, the spiral travel mechanism is perpendicular to the side soil of the groove; Step 4: Control the traveling reel to rotate and drive the primary input nut to rotate, and then the primary input nut drives the secondary input nut and the tertiary input nut to rotate simultaneously; the primary traveling block extends forward under the drive of the primary input nut, and the secondary traveling block and the tertiary traveling block extend forward under the drive of the secondary input nut and the tertiary input nut respectively; Step 5, start the rotating disk to drive the shell to rotate, thereby driving the excavating pieces installed on the outer walls of the first-stage advancing block, the second-stage advancing block, and the third-stage advancing block to rotate and cut the side soil of the groove, thereby forming a local cavity on the side soil; Step 6: After the partial cutting of the side soil is completed, the underground side groove of the required shape is cut on the grooved side soil through the movement of the lifting mechanism.
[0013] Beneficial effects: The present invention utilizes a spiral travel mechanism and an excavation mechanism to open a local groove on the side of the groove; after the local groove is opened, concrete material is added to the groove. This design can carry out local reinforcement in a targeted manner at the position where the rigidity needs to be enhanced, thereby avoiding the waste of materials caused by the overall increase in the wall thickness; at the same time, local reinforcement can also more effectively improve the overall stability and deformation resistance of the wall. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the underground steering mechanism; Figure 3 is a cross-sectional schematic diagram of the spiral travel mechanism; Figure 4 It is a front view of the spiral travel mechanism and the digging mechanism; Figure 5 It is an axonometric view of the spiral travel mechanism.
[0015] Figures 1 to 5The labels are: hoisting mechanism 1, crane 11, cable lifting assembly 12, underground steering mechanism 2, bracket 21, connecting part 211, slide trough 22, rotating frame 23, mounting frame 24, driving source 25, limit member 26, slide rod 27, spiral travel mechanism 3, shell 31, travel reel 32, first-level input nut 33, first-level travel block 34, second-level input nut 35, second-level travel block 36, third-level input nut 37, third-level travel block 38, excavation mechanism 4. DETAILED DESCRIPTION
[0016] Example 1 like Figure 1 As shown, this embodiment provides a side grooving device for a soft soil foundation support structure, which is used to open side grooves in a trench, and includes: a lifting mechanism 1, an underground steering mechanism 2, a spiral travel mechanism 3, and an excavation mechanism 4.
[0017] The hoisting mechanism 1 includes a crane 11 and a cable lifting assembly 12 arranged at the output end of the crane 11. The cable lifting assembly 12 includes a motor, a cable drum, a cable, a pulley, etc., and the components are combined to achieve the extension and recovery of the cable, thereby driving the underground steering mechanism 2, the spiral travel mechanism 3, and the excavation mechanism 4 to be placed in the underground trench, or to recover the above mechanisms.
[0018] The underground steering mechanism 2 is connected to the output end of the cable lifting assembly 12. The underground steering mechanism 2 includes at least the following working states: a retracted state and an excavation state. When not working, the underground steering mechanism 2 is in the retracted state; when working, the underground steering mechanism 2 is in the excavation state.
[0019] The spiral travel mechanism 3 is installed on the underground steering mechanism 2. In the excavation state, the spiral travel mechanism 3 is perpendicular to the side soil body of the groove.
[0020] The excavation mechanism 4 is mounted on the spiral travel mechanism 3. Driven by the spiral travel mechanism 3, the excavation mechanism 4 is arranged to rotate and cut the soil body on the side of the groove to complete the partial cutting of the soil body on the side of the groove.
[0021] In the above technical solution, the underground steering mechanism 2 is in a folded state when not in operation, which is convenient for carrying and transportation; it is unfolded when in operation, and drives the grooved side of the spiral travel mechanism 3 to remain vertical, so as to perform precise cutting operations. The spiral travel mechanism 3 and the excavation mechanism 4 are used to open a local groove on the grooved side; after the local groove is opened, concrete material is added to the groove. This design can be targeted to carry out local reinforcement at the position where the rigidity needs to be enhanced, avoiding the waste of materials caused by the overall increase in the wall thickness; at the same time, local reinforcement can also more effectively improve the overall stability and deformation resistance of the wall.
[0022] In a further embodiment, Figure 2 As shown, the underground steering mechanism 2 includes: a bracket 21, two groups of slide grooves 22, two groups of slide bars 27, a rotating frame 23, a mounting frame 24, a driving energy source, and a limiter 26. A connecting portion 211 connected to the cable lifting assembly 12 is provided at one end of the bracket 21. The connecting portion 211 is specifically a hook. The two groups of slide grooves 22 are respectively arranged on both sides of the bracket 21 along the length direction of the bracket 21. The mounting frame 24 is rotatably connected to the bracket 21, such as by hinges. The mounting frame 24 is rotatably connected to the other end of the rotating frame 23. The two sides of the mounting frame 24 are respectively slidably connected to the slide grooves 22 through slide bars 27. The mounting frame 24 is hinged to the slide bars 27. The output end of the driving source 25 is connected to the mounting frame 24; the driving source 25 is used to drive the mounting frame 24 to move on the slide grooves 22. In this embodiment, the driving source 25 is a linear transmission component such as an electric push rod or a steering control cable group turntable (automatically releasing or recovering rigid cables). There are two groups of limiting members 26 , and each group of limiting members 26 is installed at the end of each slide slot 22 ; the limiting members 26 are used to limit the mounting frame 24 to prevent the mounting frame 24 from sliding excessively and falling off the slide slot 22 .
[0023] In the above technical solution, the driving source 25 is used to drive the mounting frame 24 to move on the slide 22. During the movement of the mounting frame 24, the rotating frame 23 and the mounting frame 24 rotate, so that the rotating frame 23 and the mounting frame 24 are retracted on the bracket 21 (i.e., parallel to the bracket 21), or the mounting frame 24 is perpendicular to the bracket 21, so that the spiral travel mechanism 3 is perpendicular to the side soil. The above design allows the mounting frame 24 to move and rotate on the slide 22, so that its position and direction can be flexibly adjusted. This flexibility enables the equipment to adapt to different working environments and requirements, and improves the versatility and practicality of the equipment. When the mounting frame 24 is retracted on the bracket 21 (i.e., parallel to the bracket 21), it forms a stable structure, which helps to reduce the shaking and vibration of the underground steering mechanism 2 and improve the stability during operation.
[0024] By adjusting the position and direction of the mounting frame 24, the working angle and depth of the spiral travel mechanism 3 are optimized, thereby improving the working efficiency. When digging the soil, the vertical spiral travel mechanism 3 can cut and move the soil more effectively, while reducing the risk of equipment damage or soil damage caused by improper angles.
[0025] In a further embodiment, Figure 3 and Figure 5 As shown, the spiral travel mechanism 3 includes: a rotating disk, a housing 31 , a travel reel 32 , a primary input nut 33 , a primary travel block 34 , a secondary input nut 35 , a secondary travel block 36 , a tertiary input nut 37 , and a tertiary travel block 38 .
[0026] The rotating disk is an electric rotating disk, which is arranged on the mounting frame 24. The housing 31 is connected to the output end of the rotating disk. A cavity is arranged inside the housing 31. The traveling reel 32 is rotatably connected to the housing 31, and the traveling reel 32 is driven to rotate by a motor.
[0027] The primary input nut 33 is installed in the housing 31 and one end of the primary input nut 33 is connected to the output end of the traveling reel 32. The traveling reel 32 drives the primary input nut 33 to rotate. The primary input nut 33 is a solid cylindrical structure with external threads.
[0028] The primary travel block 34 is threadedly connected to the primary input nut 33. The outer wall of the primary travel block 34 and the inner wall of the housing 31 are slidably connected by a slider slot.
[0029] The secondary input nut 35 is installed in the primary travel block 34. One end of the secondary input nut 35 is fixedly connected to the other end of the primary input nut 33. The secondary input nut 35 is rotatably connected to the primary travel block 34. The secondary input nut 35 is a hollow cylindrical shape with a thread structure engraved on the outer side.
[0030] The secondary traveling block 36 is threadedly connected to the secondary input nut 35. The outer wall of the secondary traveling block 36 and the inner wall of the primary traveling block are slidably connected by a slider slot.
[0031] The third-level input nut 37 is installed in the second-level travel block 36. The third-level input nut 37 is fixedly connected to the second-level input nut 35. The third-level input nut 37 is rotatably connected to the second-level travel block 36. The third-level input nut 37 is a hollow cylindrical shape with a thread structure engraved on the outside.
[0032] The three-stage moving block 38 is threadedly connected with the three-stage input nut 37. The outer wall of the three-stage moving block 38 and the inner wall of the two-stage moving block are slidably connected by a slider slot.
[0033] In the above technical solution, the primary input nut 33 and the primary moving block constitute the first-stage travel drive mechanism; the secondary input nut 35 and the secondary moving block 36 constitute the second-stage travel drive mechanism; the tertiary input nut 37 and the tertiary moving block 38 constitute the third-stage travel drive mechanism. The rotation of the moving reel 32 drives the primary input nut 33, the secondary input nut 35, and the tertiary input nut 37 to rotate simultaneously; the primary input nut 33 and the primary moving block drive to drive the primary moving block to slide along the inner wall of the housing 31; the secondary input nut 35 and the secondary moving block 36 drive to drive the secondary moving block to slide along the inner wall of the primary moving block 34; the tertiary input nut 37 and the tertiary moving block 38 drive to drive the tertiary moving block to slide along the inner wall of the secondary moving block 36; in this way, multi-stage telescopic movement is achieved.
[0034] In a further embodiment, accommodating spaces are provided between the inner wall of the shell 31 and the outer wall of the first-stage traveling block 34 , between the inner wall of the first-stage traveling block 34 and the outer wall of the second-stage traveling block 36 , and between the inner wall of the second-stage traveling block 36 and the outer wall of the tertiary traveling block 38 .
[0035] like Figure 4 As shown, the excavation mechanism 4 includes: a plurality of excavation pieces. The plurality of excavation pieces are correspondingly mounted on the outer walls of the primary traveling block 34, the secondary traveling block 36, and the tertiary traveling block 38. The excavation pieces are correspondingly located in the above-mentioned accommodation space.
[0036] In the above technical solution, during the excavation process, the extension and retraction of the first-level traveling block 34, the second-level traveling block 36, and the third-level traveling block 38 are controlled based on demand, and the rotating disk drives the first-level traveling block 34, the second-level traveling block 36, and the third-level traveling block 38 to rotate, driving the excavation piece to rotate and cut the side soil.
[0037] The above-mentioned multi-stage retractable structure enables the spiral travel mechanism 3 and the excavation piece to be adjusted according to different slotting depths and widths. This highly adaptable feature enables the spiral travel mechanism 3 and the excavation piece to flexibly respond to various complex slotting requirements, thereby improving the versatility and practicality of the equipment. In addition, the above-mentioned structural setting allows the spiral travel mechanism 3 to quickly adjust its length during the slotting process, thereby being able to quickly adapt to different slotting depths; this ability to quickly adjust reduces the time for equipment replacement and adjustment, thereby improving work efficiency.
[0038] Since the multi-stage telescopic structure has good scalability and stability, the spiral travel mechanism 3 and the digging piece can maintain continuous operation during the grooving process, reducing the situation where work is interrupted due to failure or adjustment of some digging pieces.
[0039] In a further embodiment, the excavation piece is a cutter head with an adjustable angle. When the first-stage moving block 34, the second-stage moving block 36, and the third-stage moving block 38 are not extended, the excavation piece is stored in the accommodation space; when the first-stage moving block 34, the second-stage moving block 36, and the third-stage moving block 38 are extended in sequence, the cutter head with an adjustable angle (such as a hydraulic cylinder driving the cutter head to rotate) is gradually extended out of the accommodation space to improve the cutting effect. Driven by the rotating disk, the cutter head rotates and cuts the side soil to form a local cavity, and then forms a side groove of a local size controllable underground groove by controlling the hoisting mechanism 1, the spiral travel mechanism 3, and the excavation mechanism 4.
[0040] In the above technical solution, when not in use, the cutter head is stored in the storage space, which prevents the cutter head from being damaged or contaminated due to being exposed to the outside; when not in use, it can take up less space and is easy to carry and store. The cutter head in the storage state can reduce the risk of accidental cuts, especially when it is transported or stored in a non-working state.
[0041] When in use, the cutter head gradually extends as needed, making the cutting process smoother and reducing the problem of material damage or inaccurate cutting caused by sudden force. The adjustable angle cutter head can adjust the cutting angle according to different cutting requirements, so as to more effectively cut materials of complex shapes and improve cutting efficiency. The rotation of the cutter head is precisely controlled by the driving mechanism such as the hydraulic cylinder to ensure the accuracy of the cutting angle and meet the requirements of high-precision cutting.
[0042] Example 2 This embodiment provides an implementation method based on the above-mentioned side grooving device of a soft soil foundation support structure, comprising the following steps: Step 1: transport the hoisting mechanism 1, the underground steering mechanism 2, the spiral travel mechanism 3 and the excavation mechanism 4 to the construction site and assemble them; Step 2: Use the cable lifting assembly 12 to place the underground steering mechanism 2, the spiral travel mechanism 3 and the digging mechanism 4 into the underground trench; and adjust the horizontal and vertical positions of the underground steering mechanism 2, the spiral travel mechanism 3 and the digging mechanism 4 by the crane 11 and the cable lifting assembly 12 respectively; Step 3: After adjusting the position, the original driving mounting frame 24 is driven to move in the slide groove 22, and the rotating frame 23 drives the mounting frame 24 to rotate the angle, so that the underground steering mechanism 2 is changed from the retracted state to the excavation state; in the excavation state, the spiral travel mechanism is perpendicular to the side soil of the groove; Step 4: Control the traveling reel 32 to rotate and drive the primary input nut 33 to rotate, and then the primary input nut 33 drives the secondary input nut 35 and the tertiary input nut 37 to rotate simultaneously; the primary traveling block extends forward under the drive of the primary input nut 33, and the secondary traveling block 36 and the tertiary traveling block 38 extend forward under the drive of the secondary input nut 35 and the tertiary input nut 37 respectively; Step 5: Start the rotating disk to drive the housing 31 to rotate, thereby driving the excavating pieces installed on the outer walls of the primary advancing block, the secondary advancing block 36, and the tertiary advancing block 38 to rotate and cut the side soil of the groove, thereby forming a local cavity on the side soil; Step 6: After the partial cutting of the side soil is completed, the underground side groove of the required shape is cut on the grooved side soil by moving the hoisting mechanism 1.
Claims
1. A side grooving device for a soft soil foundation support structure, characterized in that: include: A hoisting mechanism, comprising a crane and a cable lifting assembly provided at an output end of the crane; An underground steering mechanism connected to the output end of the cable lifting assembly; The underground steering mechanism includes at least the following working states: a retracted state and an excavation state; A spiral travel mechanism is arranged on the underground steering mechanism; in the excavation state, the spiral travel mechanism is arranged perpendicular to the side soil of the trench; The excavating mechanism is arranged on the spiral traveling mechanism; under the drive of the spiral traveling mechanism, the excavating mechanism is arranged to rotate and cut the side soil of the groove.
2. A side grooving device for a soft soil foundation support structure according to claim 1, characterized in that: The underground steering mechanism comprises: a bracket, one end of which is provided with a connecting portion connected to the cable lifting assembly; Two sets of slide grooves are arranged on the bracket along the length direction of the bracket; A rotating frame, one end of which is rotatably connected to the support; A mounting frame connected to the other end of the rotating frame; the mounting frame is slidably connected to the slide groove; A driving source, whose output end is connected to the mounting frame; the driving source is used to drive the mounting frame to move on the slideway; A limiting member is arranged at the end of each of the slide slots; the limiting member is used to limit the mounting frame.
3. A side grooving device for a soft soil foundation support structure according to claim 1, characterized in that: The spiral travel mechanism comprises: a rotating disk; A housing connected to the output end of the rotating disk; A traveling reel, rotatably connected to the housing; A primary input nut, disposed in the housing and having one end connected to the output end of the traveling reel; A primary travel block, drivingly connected to the primary input nut and slidably connected to the inner wall of the housing; A secondary input nut is disposed in the primary traveling block; one end of the secondary input nut is connected to the other end of the primary input nut and is rotatably connected to the primary traveling block; A secondary traveling block, drivingly connected to the secondary input nut and slidably connected to the inner wall of the primary traveling block; A third-level input nut is disposed in the second-level traveling block; the third-level input nut is connected to the second-level input nut and is rotationally connected to the second-level traveling block; The third-stage advancing block is drivingly connected to the third-stage input nut and slidably connected to the inner wall of the second-stage advancing block.
4. A side grooving device for a soft soil foundation support structure as claimed in claim 3, characterized in that: Accommodation spaces are provided between the inner wall of the shell and the outer wall of the primary traveling block, between the inner wall of the primary traveling block and the outer wall of the secondary traveling block, and between the inner wall of the secondary traveling block and the outer wall of the tertiary traveling block.
5. A side grooving device for a soft soil foundation support structure as claimed in claim 4, characterized in that: The excavation mechanism comprises: A plurality of groups of digging pieces are correspondingly arranged on the outer walls of the first-stage traveling block, the second-stage traveling block and the third-stage traveling block; and the digging pieces are correspondingly located in the accommodating space.
6. A side grooving device for a soft soil foundation support structure as claimed in claim 5, characterized in that: The digging piece is a cutter head with adjustable angle.
7. An implementation method of a side grooving device for a soft soil foundation support structure according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: transport the hoisting mechanism, underground steering mechanism, spiral travel mechanism and excavation mechanism to the construction site and assemble them; Step 2: Use the cable lifting assembly to place the underground steering mechanism, spiral travel mechanism and excavation mechanism into the underground trench; and adjust the horizontal and vertical positions of the underground steering mechanism, spiral travel mechanism and excavation mechanism by the crane and the cable lifting assembly respectively; Step 3: After adjusting the position, the original driving mounting frame is driven to move in the slide slot, and the rotating frame drives the mounting frame to rotate the angle, so that the underground steering mechanism is changed from the retracted state to the excavation state; in the excavation state, the spiral travel mechanism is perpendicular to the side soil of the groove; Step 4: Control the traveling reel to rotate and drive the primary input nut to rotate, and then the primary input nut drives the secondary input nut and the tertiary input nut to rotate simultaneously; the primary traveling block extends forward under the drive of the primary input nut, and the secondary traveling block and the tertiary traveling block extend forward under the drive of the secondary input nut and the tertiary input nut respectively; Step 5, start the rotating disk to drive the shell to rotate, thereby driving the excavating pieces installed on the outer walls of the first-stage advancing block, the second-stage advancing block, and the third-stage advancing block to rotate and cut the side soil of the groove, thereby forming a local cavity on the side soil; Step 6: After the partial cutting of the side soil is completed, the underground side groove of the required shape is cut on the grooved side soil through the movement of the lifting mechanism.