A minimally invasive auxiliary vehicle for urban infrastructure maintenance and its construction method

Abstract

This invention discloses a minimally invasive auxiliary vehicle and construction method for urban infrastructure maintenance engineering. Addressing the green and low-carbon maintenance needs of highways and urban infrastructure, and responding to the "minimal intervention" principle proposed in the "Highway Maintenance Technical Standard" (JTG5110-2023), it is specifically designed for high-precision scenarios such as operational projects, equipment installation in sensitive areas of scenic spots, and preventative maintenance. It incorporates the overall design concept of borehole drilling, post-jet spraying with an inner base platform, and real-time self-cleaning. Borehole drilling components, inner base platform jet spraying components, and soil cleaning components are developed and integrated into a single unit. Through in-hole jet spraying, critical surface damage is minimized while ensuring structural strength. The process design complies with the space compression technology requirements of the Ministry of Housing and Urban-Rural Development's "Guidelines for Resilient City Construction." In-situ mud recycling / reuse technology avoids secondary environmental pollution, and the construction process complies with the cleanliness standards of the "Green Construction Guidelines" (GB / T50905).

Description

Technical Field

[0001] This invention belongs to the field of operation and maintenance engineering construction technology, and more specifically, relates to a minimally invasive auxiliary vehicle for urban infrastructure maintenance engineering and a construction method. Background Technology

[0002] During the operation and maintenance of urban infrastructure, renovation, expansion, repair and replacement are often involved. The existing construction projects face the following technical problems:

[0003] (1) In scenarios such as vehicle sensing base, charging pile installation and deployment, facility and equipment maintenance and replacement in smart parking lots, the work is usually carried out on the existing complete road surface. The existing construction plan has a hole diameter of 1.2 to 1.5 meters in the existing road surface, which causes significant damage to the road structure layer, interruption of operation of surrounding functional areas, and serious impact on service experience. Especially in the secondary construction of the existing area, a chain of infrastructure damage often occurs.

[0004] (2) Parks, historical districts and other special environments have higher requirements for construction technology. Existing excavation methods inevitably damage existing landscape vegetation and paving systems. Noise and dust during maintenance and construction cause continuous interference to the visitor experience.

[0005] (3) By analogy, any process that requires excavation of foundations / pits and destructive construction generally has disadvantages such as long construction period, high cost and great impact on the surrounding environment. During the operation and maintenance period, the shortening of the maintenance and expansion construction cycle can significantly reduce the amount of tourist loss. For example, the speed of charging pile deployment or maintenance can significantly increase the turnover rate.

[0006] In summary, as urban renewal enters a more refined stage, maintenance projects are facing three core demands: minimally invasive pavement design, rapid construction methods, and clean construction. Therefore, the field of urban infrastructure operation and maintenance engineering urgently needs a new technology that is minimally invasive, fast-paced, has short repair cycles, and minimal impact on the surrounding environment. Excavation pit design should, while ensuring structural strength, minimize the opening size to reduce the impact on pavement integrity and improve excavation efficiency, thereby contributing to the overall efficiency of maintenance project expansion. Summary of the Invention

[0007] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a minimally invasive auxiliary vehicle for urban infrastructure maintenance and its construction method. Considering the need to ensure the integrity of the surrounding road surface and other structures, the efficiency of maintenance project expansion, and quality and safety, it adopts an overall design concept of first drilling foundation holes, then jet grouting the inner foundation platform, and real-time self-cleaning. Separately developed components for drilling foundation holes, jet grouting the inner foundation platform, and soil cleaning are integrated into a single unit. Through jet grouting within the foundation holes, the construction effect of small-diameter, large foundations is solved, ensuring structural strength while minimizing road surface damage and maintaining the integrity of the surrounding structure. The foundation construction process requires no human intervention and can be completed with the assistance of the engineering vehicle alone. Mud and sand are automatically recycled and reused, achieving a clean and efficient technical effect.

[0008] To achieve the above objectives, according to a first aspect of the present invention, a minimally invasive urban infrastructure maintenance engineering auxiliary vehicle includes:

[0009] The mobile carrier includes a carriage, Mecanum wheels located below the carriage, a storage cavity opened inside the carriage, and a front-end execution carrier located on the front side of the carriage; the front-end execution carrier includes an execution drive screw vertically fixed to the front side of the carriage, an execution drive motor for driving the execution drive screw to rotate, an execution drive nut installed on the execution drive screw, an L-shaped carrier plate fixedly connected to the execution drive nut, and an extension hole opened in the horizontal plate below the L-shaped carrier plate;

[0010] The components include a foundation hole drilling assembly mounted on an L-shaped carrier plate for excavating foundation holes, an inner foundation jetting assembly mounted on an L-shaped carrier plate for jet grouting the inner foundation platform, a soil cleaning assembly for real-time cleaning of the construction site, and a module switching assembly for switching the construction positions of the soil cleaning assembly and the foundation hole drilling assembly; the soil cleaning assembly is located below the L-shaped carrier plate.

[0011] The module switching component includes a groove formed on the front side of the L-shaped carrier plate, an interconnected slider that is fixedly connected to the soil cleaning component and the foundation hole drilling component and is slidably connected to the groove, a screw drive component that drives the interconnected slider to slide horizontally, and a smooth guide rail disposed between the soil cleaning component and the foundation hole drilling component and the front side of the L-shaped carrier plate.

[0012] Preferably, the storage cavity includes:

[0013] The waste rock storage area connected to the soil cleaning component, the mud slurry filtration area generated by the filter layer on the side of the waste rock storage area, the mud slurry reuse area connected to the mud slurry filtration area by the mud slurry recycling component, and the cement slurry storage area pre-filled with slurry.

[0014] Preferably, the mud recovery assembly includes:

[0015] A mud recovery pipe extends from the bottom of the mud filtration zone, and a mud recovery pump is connected to the middle of the mud recovery pipe. The extended end of the mud recovery pipe is connected to the mud reuse zone. The mud recovery pump pumps the slurry in the mud filtration zone to the mud reuse zone.

[0016] Preferably, the soil cleaning assembly includes:

[0017] The following components are provided: a negative pressure suction cup located at the bottom of the L-shaped carrier plate; a guide pipe connecting the inner cavity of the negative pressure suction cup; a negative pressure suction device fixed to the bottom of the carriage and connected to the output end of the guide pipe; an inclined guide cylinder located obliquely inside the carriage; a lifting screw rod located inside the inclined guide cylinder; a lifting drive motor that drives the lifting screw rod to rotate; and a soil discharge outlet located at the upper opening of the inclined guide cylinder.

[0018] The output end of the negative pressure suction device is connected to the lower end of the inclined guide tube, and the soil discharge outlet is connected to the top of the waste rock storage area.

[0019] Preferably, the basic hole drilling assembly includes:

[0020] The system comprises: a first housing fixed to the interconnected slider; a first inner cavity opened within the first housing; a drilling drive motor located at the top of the first housing; a drilling drive screw fixedly connected to the drilling drive motor on the same axis; a first carrier block connected to the drilling drive screw in a linear threaded transmission; a drilling drive motor fixed within the first carrier block; and a drill bit that is vertically connected and coaxially connected to the drilling drive motor.

[0021] The drill bit extends from the protruding hole and the negative pressure suction cup and drills downwards.

[0022] Preferably, the inner base stage rotary spray assembly includes:

[0023] The system comprises: a second housing fixed to the interconnected slider; a second inner cavity opened within the second housing; a spray point control motor fixed to the top of the second housing; a spray point control screw located within the second inner cavity and coaxially fixedly connected to the spray point control motor; a second carrier block with a threaded transmission connection to the spray point control screw; a rotary drive motor fixed within the second carrier block; a rotary spray pipe with a vertical coaxial fixed connection to the rotary drive motor; a dynamic slurry supply bladder connected to the top of the rotary spray pipe for dynamic real-time high-pressure slurry supply; and a second high-pressure pump connected between the cement slurry storage area and the dynamic slurry supply bladder.

[0024] The jet nozzle extends from the protrusion hole and the negative pressure suction cup, and jets slurry toward the borehole sidewall.

[0025] Preferably, the inner base jet assembly includes a first high-pressure pump connected between the mud reuse zone and the dynamic slurry supply bladder.

[0026] Preferably, the swirl nozzle comprises:

[0027] The system includes an inner cavity for conveying high-pressure slurry within the jet grouting pipe, a jetting hole located on the bottom side wall of the jet grouting pipe and connected to the inner cavity, and a mud inlet hole located on the top side wall of the jet grouting pipe and connected to the inner cavity; the mud inlet hole is connected to a movable slurry supply bladder.

[0028] Preferably, the movable slurry supply tank includes:

[0029] The cyst is located inside and has a slurry supply hole on its side wall, which is connected to a second high-pressure pump.

[0030] According to a second aspect of the present invention, a construction method for a minimally invasive urban infrastructure maintenance engineering auxiliary vehicle includes the following steps:

[0031] S100: First, control the start of the mobile carrier, move the whole body to the smart park infrastructure addition point, and control the start of the front-end execution carrier to start the execution drive motor, thereby driving the execution drive screw to rotate, and then driving the execution drive nut together with the L-shaped carrier plate to move down until the negative pressure suction cup under the L-shaped carrier plate is in close contact with the ground.

[0032] S200: The soil cleaning component is pre-activated. The negative pressure suction device draws all the soil and slurry overflowing from the negative pressure suction cup into the lower end of the inclined guide tube. Then, under the action of the lifting drive motor, the lifting screw pushes the mud and sand mixture at the lower end of the inclined guide tube upward to the soil discharge outlet and discharges it into the waste rock storage area. Under the action of the filter layer, the mud seeps into the mud filtration area. Then, through the mud recovery component, the slurry is pumped to the mud reuse area.

[0033] S300: Control the switching component of the start-up module. The interconnect slider moves horizontally along the slide groove through the screw drive component, thereby selecting the protruding hole directly below the base hole drilling component and facing the bottom of the L-shaped carrier plate.

[0034] S400: Start the foundation hole drilling assembly and control the drilling drive motor to rotate. Under the action of the screw drive, the first carrier block and its connecting parts move down together, so that the drill bit passes through the extension hole and the negative pressure suction cup. At the same time, start the drilling drive motor to realize downward drilling. During the drilling process, the soil and sand generated from the hole opening are removed in real time by the soil cleaning assembly until the preset depth is reached. Then the drill is lifted to complete the foundation hole construction.

[0035] S500: Control the start-up module switching component again, and control the interconnect slider to move horizontally along the slide groove through the screw drive component, thereby selecting the protrusion hole directly below the inner base jet assembly facing the bottom of the L-shaped carrier plate;

[0036] S600: Activate the inner base platform rotary jet assembly, control the spray point control motor to rotate, thereby driving the second carrier block and its connecting components downwards under the action of the screw drive. The rotary jet pipe then passes through the extension hole and negative pressure suction cup, penetrating deep into the borehole to the specified depth, requiring the deepest point to be at least 10 cm above the base hole. Subsequently, activate the rotary drive motor to control the rotation of the rotary jet pipe, simultaneously controlling the first and second high-pressure pumps to pump slurry to the rotary jet pipe through the moving slurry supply bladder. The high-pressure slurry is sprayed out from the spray hole, continuously impacting the sidewall of the base hole, thus dispersing the sand and gravel layer on the sidewall to form mud. The mud mixes with the sprayed slurry to form a more solidified body. During the rotary jetting process, control the spray point control motor to rotate slowly in the opposite direction, thus achieving the rotary jetting process from bottom to top until the set thickness is reached, forming the inner base platform. The highest point of the inner base platform must be at least 10 cm below the ground level. The mud generated during the process is promptly recovered by the soil cleaning component.

[0037] S700: After construction is completed, the engineering vehicle is withdrawn, and the infrastructure is manually inserted into the foundation hole. Wait for the grout to solidify to complete the infrastructure addition construction.

[0038] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0039] This invention discloses a minimally invasive auxiliary vehicle for urban infrastructure maintenance. Considering the need to ensure the integrity of smart park roads, the efficiency of infrastructure maintenance, and the quality and safety of the work, it adopts an overall design concept of drilling foundation holes first, then spraying the inner foundation platform, and performing real-time self-cleaning. The invention has developed foundation hole drilling components, inner foundation platform spraying components, and soil cleaning components, which are integrated into one unit. By using the spraying method inside the foundation hole, the construction effect of small-diameter, large foundations is solved, which not only ensures structural strength but also minimizes road damage and ensures the integrity of the park's roads. The foundation construction process does not require the participation of many people and can be completed with the assistance of the engineering vehicle. The mud and sand are automatically recycled and reused, achieving a clean and efficient technical effect. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of a minimally invasive urban infrastructure maintenance engineering auxiliary vehicle according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the drilling process of a minimally invasive urban infrastructure maintenance auxiliary vehicle according to an embodiment of the present invention.

[0042] Figure 3This is a schematic diagram of the jet grouting construction state of the inner base platform of a minimally invasive urban infrastructure maintenance engineering auxiliary vehicle according to an embodiment of the present invention.

[0043] Figure 4 This is a schematic diagram of the rotary spray system passage structure of a minimally invasive urban infrastructure maintenance engineering auxiliary vehicle according to an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of the basic complete structure of a minimally invasive urban infrastructure maintenance auxiliary vehicle according to an embodiment of the present invention;

[0045] Figure 6 A schematic diagram showing the completed state of traditional basic guardrail facilities;

[0046] Figure 7 This is a schematic diagram illustrating the completed construction status of the basic guardrail facilities of a minimally invasive urban infrastructure maintenance auxiliary vehicle according to an embodiment of the present invention.

[0047] Figure 8 This is a flowchart illustrating the preliminary steps of a construction method for a minimally invasive urban infrastructure maintenance auxiliary vehicle, according to an embodiment of the present invention.

[0048] Figure 9 This is a flowchart illustrating the construction method of a minimally invasive urban infrastructure maintenance auxiliary vehicle according to an embodiment of the present invention.

[0049] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-Mobile carrier, 100-Carriage, 101-Mecanum wheel, 110-Storage cavity, 111-Waste rock storage area, 112-Mud filtration area, 113-Mud reuse area, 114-Cement slurry storage area, 120-Mud recovery assembly, 121-Mud recovery pipe, 122-Mud recovery pump, 130-Front-end actuator, 131-Actuation drive motor, 132-Actuation drive screw, 133-Actuation drive nut, 134-L-shaped carrier plate, 135-Extending hole, 2-Soil cleaning assembly, 201-Negative pressure suction cup, 202-Guide pipe, 203-Negative pressure suction device, 204-Angled guide tube, 205-Lifting screw, 206-Lifting drive motor, 207-Soil discharge port, 3-Basic hole drilling assembly, 301-First housing, 30 2-First inner cavity, 303-Drilling drive motor, 304-Drilling drive screw, 305-First carrier block, 306-Drilling drive motor, 307-Drill bit, 4-Inner base jetting assembly, 401-Second housing, 402-Second inner cavity, 403-Spray point control motor, 404-Spray point control screw, 405-Second carrier block, 406-Rotary drive motor, 407-Coupling block, 408-Jet nozzle, 40 81-Inner cavity, 4082-Injection hole, 4083-Mud inlet hole, 409-Dynamic slurry supply bladder, 4091-Bladder cavity, 4092-Slurry supply hole, 410-First high-pressure pump, 411-Second high-pressure pump, 5-Module switching assembly, 501-Interconnected slider, 502-Slide groove, 503-Screw drive assembly, 504-Smooth guide rail, 6-Ground, 601-Base hole, 602-Inner base platform, 7-Infrastructure. Detailed Implementation

[0050] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0054] like Figures 1-7 As shown in this embodiment of the invention, the minimally invasive urban infrastructure maintenance engineering auxiliary vehicle includes:

[0055] The mobile carrier 1 includes a carriage 100, Mecanum wheels 101 located below the carriage 100, a storage cavity 110 opened inside the carriage 100, and a front-end execution carrier 130 located on the front side of the carriage 100; the front-end execution carrier 130 includes an execution drive screw 132 vertically fixed to the front side of the carriage 100, an execution drive motor 131 that drives the execution drive screw 132 to rotate, an execution drive nut 133 installed on the execution drive screw 132, an L-shaped carrier plate 134 fixedly connected to the execution drive nut 133, and an extension hole 135 opened on the horizontal plate below the L-shaped carrier plate 134;

[0056] The following components are included: a foundation hole drilling assembly 3 mounted on the L-shaped carrier plate 134 for excavating the foundation hole 601; an inner foundation platform jet grouting assembly 4 mounted on the L-shaped carrier plate 134 for jet grouting the inner foundation platform 602; a soil cleaning assembly 2 for real-time cleaning of the construction site; and a module switching assembly 5 for switching the construction positions of the soil cleaning assembly 2 and the foundation hole drilling assembly 3. The soil cleaning assembly 2 is located below the L-shaped carrier plate 134.

[0057] The module switching component 5 includes a groove 502 formed on the front side of the L-shaped carrier plate 134, an interconnected slider 501 fixedly connected to the soil cleaning component 2 and the foundation hole drilling component 3 and slidably connected to the groove 502, a screw drive component 503 for driving the interconnected slider 501 to slide horizontally, and a smooth guide rail 504 disposed between the soil cleaning component 2 and the foundation hole drilling component 3 and the front side of the L-shaped carrier plate 134.

[0058] like Figures 1-3 As shown, in this embodiment of the invention, the storage cavity 110 includes:

[0059] The waste rock storage area 111 is connected to the soil cleaning component 2, the mud slurry filtration area 112 is isolated by a filter layer on the side of the waste rock storage area 111, the mud slurry reuse area 113 is connected to the mud slurry filtration area 112 by the mud slurry recycling component 120, and the cement slurry storage area 114 is pre-filled with slurry.

[0060] like Figure 1 As shown, in this embodiment of the invention, the mud recovery assembly 120 includes:

[0061] A mud recovery pipe 121 extends from the bottom of the mud filtration zone 112, and a mud recovery pump 122 is connected to the middle of the mud recovery pipe 121. The extended end of the mud recovery pipe 121 is connected to the mud reuse zone 113. The mud slurry in the mud filtration zone 112 is pumped to the mud reuse zone 113 by the mud recovery pump 122.

[0062] like Figure 1 As shown, in this embodiment of the invention, the soil cleaning component 2 includes:

[0063] The following components are provided: a negative pressure suction cup 201 located at the bottom of the L-shaped carrier plate 134; a guide pipe 202 connecting the inner cavity of the negative pressure suction cup 201; a negative pressure suction device 203 fixed to the bottom of the carriage 100 and connected to the output end of the guide pipe 202; an inclined guide cylinder 204 located obliquely inside the carriage 100; a lifting screw rod 205 located inside the inclined guide cylinder 204; a lifting drive motor 206 that drives the lifting screw rod 205 to rotate; and a soil discharge outlet 207 located at the upper opening of the inclined guide cylinder 204.

[0064] The output end of the negative pressure suction device 203 is connected to the lower end of the inclined guide tube 204, and the soil discharge outlet 207 is connected to the top of the waste rock storage area 111.

[0065] like Figure 1 and Figure 2 As shown, in this embodiment of the invention, the basic hole drilling assembly 3 includes:

[0066] The system comprises: a first housing 301 fixed to the interconnected slider 501; a first inner cavity 302 opened within the first housing 301; a drilling drive motor 303 disposed at the top of the first housing 301; a drilling drive screw 304 coaxially fixedly connected to the drilling drive motor 303; a first carrier block 305 threadedly linearly connected to the drilling drive screw 304; a drilling drive motor 306 fixed within the first carrier block 305; and a drill bit 307 vertically connected to the drilling drive motor 306.

[0067] The drill bit 307 extends through the protrusion hole 135 and the negative pressure suction cup 201 and drills downwards.

[0068] like Figure 1 and Figure 3 As shown, in this embodiment of the invention, the inner base stage rotary spray assembly 4 includes:

[0069] The system comprises: a second housing 401 fixed to the interconnecting slider 501; a second inner cavity 402 opened within the second housing 401; a spray point control motor 403 fixed to the top of the second housing 401; a spray point control screw 404 located within the second inner cavity 402 and coaxially fixedly connected to the spray point control motor 403; a second carrier block 405 maintaining a threaded transmission connection with the spray point control screw 404; a rotary drive motor 406 fixed within the second carrier block 405; a rotary spray pipe 408 maintaining a vertical position and coaxially fixedly connected to the rotary drive motor 406; a dynamic slurry supply bladder 409 connected to the top of the rotary spray pipe 408 for dynamic real-time high-pressure slurry supply; and a second high-pressure pump 411 connected between the cement slurry storage area 114 and the dynamic slurry supply bladder 409.

[0070] The rotary nozzle 408 extends from the protrusion hole 135 and the negative pressure suction cup 201, and sprays slurry onto the borehole sidewall.

[0071] like Figure 1 As shown, in this embodiment of the invention, the inner base jet assembly 4 includes a first high-pressure pump 410 connected between the mud reuse zone 113 and the dynamic slurry supply bladder 409.

[0072] like Figure 3 and Figure 4 As shown, in this embodiment of the invention, the swirl nozzle 408 includes:

[0073] The system includes an inner cavity 4081 for conveying high-pressure slurry within the jet grouting pipe 408, a jetting hole 4082 located on the bottom side wall of the jet grouting pipe 408 and connected to the inner cavity 4081, and a mud inlet hole 4083 located on the top side wall of the jet grouting pipe 408 and connected to the inner cavity 4081; the mud inlet hole 4083 is connected to a movable slurry supply bladder 409.

[0074] like Figure 4 As shown, in this embodiment of the invention, the movable slurry supply tank 409 includes:

[0075] The cavity 4091 is located inside the cavity, and the slurry supply hole 4092 is opened on the side wall of the cavity 4091. The slurry supply hole 4092 is connected to the second high-pressure pump 411.

[0076] like Figure 8 and Figure 9 As shown in this embodiment of the invention, the construction method of the minimally invasive urban infrastructure maintenance engineering auxiliary vehicle includes the following steps:

[0077] S100: First, control the start of the mobile carrier 1, move the whole to the construction point, and control the start of the front-end execution carrier 130 to start the execution drive motor 131, thereby driving the execution drive screw 132 to rotate, and then driving the execution drive nut together with the L-shaped carrier plate 134 to move down until the negative pressure suction cup 201 under the L-shaped carrier plate 134 is in close contact with the ground.

[0078] S200: The soil cleaning component 2 is pre-started. The negative pressure suction device 203 sucks the soil and slurry overflowing from the negative pressure suction cup 201 into the lower end of the inclined guide tube 204. Then, under the action of the lifting drive motor 206, the lifting screw 205 pushes the mud and sand mixture at the lower end of the inclined guide tube 204 upward to the soil discharge outlet 207 and discharges it into the waste rock storage area 111. Under the action of the filter layer, the mud seeps into the mud filtration area 112. Then, through the mud recovery component 120, the slurry is pumped to the mud reuse area 113.

[0079] S300: Control the start-up module switching component 5, and control the interconnect slider 501 to move horizontally along the slide groove 502 through the screw drive component 503, thereby selecting the protruding hole 135 directly below the base hole drilling component 3 and facing the bottom of the L-shaped carrier plate 134;

[0080] S400: Start the foundation hole drilling assembly 3 and control the drilling drive motor 303 to rotate. Under the action of the screw drive, the first carrier block and its connecting parts move down together, so that the drill bit 307 passes through the protrusion hole 135 and the negative pressure suction cup 201. At the same time, start the drilling drive motor to realize downward drilling. During the drilling process, the soil and sand generated from the hole opening are removed in real time by the soil cleaning assembly 2 until the preset depth is reached. Then the drill is lifted to complete the construction of the foundation hole 601.

[0081] S500: Control the start-up module switching component 5 again, and control the interconnect slider 501 to move horizontally along the slide groove 502 through the screw drive component 503, thereby selecting the protrusion hole 135 directly below the inner base jet assembly 4 facing the bottom of the L-shaped carrier plate 134.

[0082] S600: Start the inner base platform rotary jet assembly 4, control the spray point control motor 403 to rotate, thereby driving the second carrier block 405 and its connecting components to move downwards under the action of the screw drive. This causes the rotary jet pipe 408 to pass through the protrusion hole 135 and the negative pressure suction cup 201, and penetrate deep into the borehole to the specified depth, requiring the deepest point to be at least ten centimeters higher than the base hole 601. Subsequently, start the rotary drive motor 406 to control the rotation of the rotary jet pipe 408, and simultaneously control the first high-pressure pump 410 and the second high-pressure pump 411, thereby discharging the slurry through the moving slurry supply bladder 409. Slurry is pumped into the jet grouting pipe 408. The high-pressure slurry is sprayed out from the jetting hole 4082 and continuously impacts the sidewall of the foundation hole 601, thereby dispersing the sand and gravel layer on the sidewall to form mud. The mud mixes with the sprayed slurry to form a harder solidified body. During the jet grouting process, the spray point control motor 403 rotates slowly in the opposite direction, so that the jet grouting process proceeds from bottom to top until the set thickness is reached to form the inner foundation platform 602. It is required that the highest point of the inner foundation platform 602 is more than 10 centimeters below the ground. The mud generated during the process is promptly recovered by the soil cleaning component 2.

[0083] S700: After construction is completed, the engineering vehicle is withdrawn, and the corresponding rods (or facilities and equipment that need to be fixed to the foundation) are manually inserted into the foundation hole (601) and the grout is allowed to solidify to complete the equipment addition construction.

[0084] Here are two typical application scenarios:

[0085] I. Road engineering.

[0086] For the grouting repair of municipal roads (urban expressways, etc.), ground-penetrating radar is used to locate voids, and a BIM model is built to generate the grouting path. This engineering vehicle is used for minimally invasive grouting repairs of the road surface, allowing for work to be carried out during nighttime construction hours (22:00-5:00), completing repairs and reopening the road to traffic before the morning rush hour. In terms of construction quality control, intelligent control of grouting pressure (e.g., 0.3-0.5 MPa) is achieved, the repaired wound area is controlled to 10-20 cm, the grouting volume per hole is less than 15 L, and the deflection value after repair is ≤0.2 mm. When necessary, multiple work sections can be operated simultaneously, greatly shortening the implementation time of the maintenance project.

[0087] II. The stone slab path in the park project has become loose, and the base layer needs to be reinforced.

[0088] To address the issue of loose subgrade on the park's stone pavement (void rate > 8%), reinforcement is necessary while protecting surface attachments to minimize damage. This engineering vehicle allows for precise location of voids and drilling through the stone slab joints, with controlled hole diameters within 10cm. Grouting can be performed in stages, such as first injecting nano-grade nitrate solution (normal pressure), followed by controlled-pressure injection of modified epoxy resin (low-pressure injection), with real-time monitoring of pressure and grout volume, eliminating the need for equipment changes. Drilling noise is contained underground, improving acoustic environment quality control. Repair work can be completed on the same day, saving time and labor, minimizing impact on visitors, and reducing complaint rates.

[0089] In this embodiment of the invention, considering the need to ensure the integrity of the critical surface during maintenance construction, the efficiency of equipment expansion, and quality and safety, an overall design concept of drilling foundation holes first, then jet grouting the inner base platform, and real-time self-cleaning was formed. Foundation hole drilling components, inner base platform jet grouting components, and soil cleaning components were developed and integrated into a single unit. By using jet grouting within the holes, the critical surface damage is minimized while ensuring structural strength. The process design meets the requirements of the Ministry of Housing and Urban-Rural Development's "Guidelines for Resilient City Construction" for space compression technology, achieving "minimally invasive" construction and significantly reducing costs.

[0090] The system adopts self-balancing drilling and grouting integrated technology to achieve real-time adjustment of construction parameters and synchronous recycling of residues. Single-machine operation can replace traditional multi-person teams. The integrated sensing system meets the control requirements for construction accuracy in the "Technical Requirements for Highway Daily Maintenance Video Intelligent Auxiliary Inspection System".

[0091] In-situ mud recycling / reuse technology avoids secondary environmental pollution, and the construction process meets the cleanliness standards of the "Green Construction Guidelines" (GB / T50905). Noise and dust control meet the construction requirements of ecologically sensitive areas such as parks and green spaces, similar to smart maintenance systems.

[0092] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A minimally invasive auxiliary vehicle for urban infrastructure maintenance, characterized in that, include: The mobile carrier (1) includes a carriage (100), a Mecanum wheel (101) located below the carriage (100), a storage cavity (110) opened in the carriage (100), and a front-end execution carrier (130) located on the front side of the carriage (100); the front-end execution carrier (130) includes an execution drive screw (132) vertically fixed to the front side of the carriage (100), an execution drive motor (131) that drives the execution drive screw (132) to rotate, an execution drive nut (133) installed on the execution drive screw (132), an L-shaped carrier plate (134) fixedly connected to the execution drive nut (133), and an extension hole (135) opened in the horizontal plate below the L-shaped carrier plate (134). The following components are provided: a foundation hole drilling assembly (3) installed on the L-shaped carrier plate (134) and used for excavating the foundation hole (601); an inner foundation platform jet grouting assembly (4) installed on the L-shaped carrier plate (134) and used for jet grouting the inner foundation platform (602); a soil cleaning assembly (2) used for real-time cleaning of the construction site; and a module switching assembly (5) used for switching the construction positions of the soil cleaning assembly (2) and the foundation hole drilling assembly (3); the soil cleaning assembly (2) is located below the L-shaped carrier plate (134). The module switching component (5) includes a chute (502) opened on the front side of the L-shaped carrier plate (134), an interconnecting slider (501) fixedly connected to the soil cleaning component (2) and the foundation hole drilling component (3) and slidably connected to the chute (502), a screw drive component (503) for driving the interconnecting slider (501) to slide horizontally, and a smooth guide rail (504) provided between the soil cleaning component (2) and the foundation hole drilling component (3) and the front side of the L-shaped carrier plate (134). The storage chamber (110) includes: a waste rock storage area (111) connected to the soil cleaning component (2), a mud slurry filtration area (112) generated by a filter layer on the side of the waste rock storage area (111), a mud slurry reuse area (113) connected to the mud slurry filtration area (112) by a mud slurry recycling component (120), and a cement slurry storage area (114) pre-filled with storage slurry.

2. The minimally invasive urban infrastructure maintenance auxiliary vehicle according to claim 1, characterized in that, The mud recovery assembly (120) includes: A mud recovery pipe (121) extends from the bottom of the mud filtration zone (112), and a mud recovery pump (122) is connected to the middle of the mud recovery pipe (121). The extended end of the mud recovery pipe (121) is connected to the mud reuse zone (113). The mud slurry in the mud filtration zone (112) is pumped to the mud reuse zone (113) by the mud recovery pump (122).

3. The minimally invasive urban infrastructure maintenance auxiliary vehicle according to claim 2, characterized in that, The soil cleaning component (2) includes: The negative pressure suction cup (201) is located at the bottom of the L-shaped carrier plate (134), the guide pipe (202) is connected to the inner cavity of the negative pressure suction cup (201), the negative pressure suction device (203) is fixed at the bottom of the carriage (100) and connected to the output end of the guide pipe (202), the inclined guide cylinder (204) is obliquely located in the carriage (100), the lifting screw (205) is located in the inclined guide cylinder (204), the lifting drive motor (206) that drives the lifting screw (205) to rotate, and the soil discharge outlet (207) is located at the upper opening of the inclined guide cylinder (204). The output end of the negative pressure suction device (203) is connected to the lower end of the inclined guide tube (204), and the soil discharge outlet (207) is connected to the top of the waste rock storage area (111).

4. The minimally invasive urban infrastructure maintenance auxiliary vehicle according to claim 3, characterized in that, The basic hole drilling assembly (3) includes: The first housing (301) is fixed to the interconnected slider (501), the first inner cavity (302) is opened in the first housing (301), the drilling drive motor (303) is provided on the top of the first housing (301), the drilling drive screw (304) is coaxially fixedly connected to the drilling drive motor (303), the first carrier block (305) is threaded linearly connected to the drilling drive screw (304), the drilling drive motor (306) is fixed in the first carrier block (305), and the drill bit (307) is vertically and coaxially connected to the drilling drive motor (306). The drill bit (307) extends from the protrusion hole (135) and the negative pressure suction cup (201) and drills downward.

5. The minimally invasive urban infrastructure maintenance auxiliary vehicle according to claim 4, characterized in that, The inner base stage rotary jet assembly (4) includes: The system comprises: a second housing (401) fixed to the interconnected slider (501); a second inner cavity (402) opened within the second housing (401); a spray point control motor (403) fixed to the top of the second housing (401); a spray point control screw (404) located within the second inner cavity (402) and coaxially fixedly connected to the spray point control motor (403); a second carrier block (405) with a threaded transmission connection to the spray point control screw (404); a rotary drive motor (406) fixed within the second carrier block (405); a rotary nozzle (408) with a vertical direction and coaxially fixedly connected to the rotary drive motor (406); a dynamic slurry supply bladder (409) connected to the top of the rotary nozzle (408) for dynamic real-time high-pressure slurry supply; and a second high-pressure pump (411) connected between the cement slurry storage area (114) and the dynamic slurry supply bladder (409). The jet nozzle (408) extends from the protrusion hole (135) and the negative pressure suction cup (201) and jets slurry toward the borehole sidewall.

6. The minimally invasive urban infrastructure maintenance auxiliary vehicle according to claim 5, characterized in that, The inner base jet assembly (4) includes a first high-pressure pump (410) connected between the mud reuse zone (113) and the dynamic slurry supply bladder (409).

7. The minimally invasive urban infrastructure maintenance auxiliary vehicle according to claim 6, characterized in that, The rotary nozzle (408) includes: An inner cavity (4081) for conveying high-pressure slurry is provided in the jet nozzle (408); a jetting hole (4082) is provided on the bottom side wall of the jet nozzle (408) and communicates with the inner cavity (4081); and a mud inlet hole (4083) is provided on the top side wall of the jet nozzle (408) and communicates with the inner cavity (4081); the mud inlet hole (4083) is connected to a movable slurry supply bladder (409).

8. The minimally invasive urban infrastructure maintenance auxiliary vehicle according to claim 7, characterized in that, The movable slurry supply tank (409) includes: The cyst cavity (4091) is located inside the cyst cavity (4091), and the slurry supply hole (4092) is opened on the side wall of the cyst cavity (4091), the slurry supply hole (4092) being connected to the second high-pressure pump (411).

9. A construction method for a minimally invasive urban infrastructure maintenance auxiliary vehicle, comprising the following steps: S100: First, control the start of the mobile carrier (1), move the whole to the construction point, and control the start of the front-end execution carrier (130), start the execution drive motor (131), thereby driving the execution drive screw (132) to rotate, and then driving the execution drive nut together with the L-shaped carrier plate (134) to move down until the negative pressure suction cup (201) under the L-shaped carrier plate (134) is in close contact with the ground; S200: The soil cleaning component (2) is pre-started. The soil and slurry overflowing from the negative pressure suction cup (201) are sucked into the lower end of the inclined guide tube (204) by the negative pressure suction device (203). Then, under the action of the lifting drive motor (206), the lifting screw (205) pushes the mud and sand mixture at the lower end of the inclined guide tube (204) upward to the soil discharge outlet (207) and discharges it into the waste rock storage area (111). Under the action of the filter layer, the mud seeps into the mud filtration area (112). Then, through the mud recovery component (120), the slurry is pumped to the mud reuse area (113). S300: Control the start-up module switching component (5), and control the interconnect slider (501) to move horizontally along the slide groove (502) through the screw drive component (503), thereby selecting the protruding hole (135) directly below the base hole drilling component (3) facing the bottom of the L-shaped carrier plate (134). S400: Start the foundation hole drilling assembly (3), control the drilling drive motor (303) to rotate, so that under the action of the screw drive, the first carrier block and its connecting parts move down together, so that the drill bit (307) passes through the protrusion hole (135) and the negative pressure suction cup (201). At the same time, start the drilling drive motor to realize downward drilling. During the drilling process, the soil and sand generated from the hole opening are removed in real time by the soil cleaning assembly (2) until the preset depth is reached. Then the drill is lifted to complete the construction of the foundation hole (601). S500: Control the start-up module switching component (5) again, and control the interconnect slider (501) to move horizontally along the slide groove (502) through the screw drive component (503), thereby selecting the protrusion hole (135) directly below the inner base jet assembly (4) facing the bottom of the L-shaped carrier plate (134). S600: Start the inner base platform rotary jet assembly (4), control the spray point control motor (403) to rotate, thereby driving the second carrier block (405) and its connecting assembly to move down together under the action of the screw drive, so that the rotary jet pipe (408) passes through the protrusion hole (135) and the negative pressure suction cup (201) and penetrates into the drilling to the specified depth, requiring the deepest point to be more than 10 cm higher than the base hole (601). Then, start the rotary drive motor (406) to control the rotation of the rotary jet pipe (408), and at the same time control the first high pressure pump (410) and the second high pressure pump (411), thereby passing through the dynamic slurry supply bag. (409) Pump slurry into the jet grouting pipe (408). The high-pressure slurry is sprayed out from the jetting hole (4082) and continuously impacts the side wall of the foundation hole (601), thereby dispersing the sand and gravel layer on the side wall to form mud. After the mud mixes with the sprayed slurry, a harder solidified body is formed. During the jet grouting process, the control motor (403) of the control point rotates slowly in the opposite direction, thereby realizing the jet grouting process from bottom to top until the set thickness is reached to form the inner base platform (602). It is required that the highest point of the inner base platform (602) is more than 10 centimeters below the ground. The mud generated during the process is promptly recovered by the soil cleaning component (2). S700: After the construction is completed, the engineering vehicle is withdrawn, and the facility and equipment rods are manually inserted into the foundation hole (601) and the grout is allowed to solidify to complete the additional construction of the curing project.

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