Self-propelled hard filler temperature stress joint cutting and sand filling integrated construction method

Abstract

The application belongs to the technical field of hydraulic engineering foundation joint construction equipment, and particularly relates to a self-propelled hard filler temperature stress joint cutting and sand filling integrated construction method, which comprises the following steps: A, construction equipment positioning; A1, measurement and line laying; A2, hoisting and centering; A3, adjusting the initial state of the equipment; A4, sand loading; B, joint cutting device performing joint cutting operation; B1, walking rack supporting; B2, joint cutting device supporting; B3, joint cutting; B4, joint cutter retraction and resetting; C, walking and shifting; C1, joint cutting device shifting; C2, joint cutting device supporting; C3, walking rack shifting; C4, walking rack supporting; D, joint cutting and sand filling operation; D1, sand conveying; D2, sand entering into the joint; D3, stopping sand filling and joint cutting; E, circulating operation; through integrating the joint cutting device and the sand filling device into one and combining with the walking system, the circulating flow operation of "joint cutting - walking - sand filling" is realized, and the construction rhythm of the BCR hard filler rapid and continuous filling is particularly adapted.

Description

Technical Field

[0001] This invention belongs to the technical field of foundation joint construction equipment for water conservancy projects, specifically involving a self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method. Background Technology

[0002] BCR rigid filler, as a new type of environmentally friendly dam construction material, has advantages such as strong deformation adaptability and fast construction speed, and is widely used in modern water conservancy projects. During the construction of BCR rigid filler, to prevent dam cracking caused by temperature stress, temperature stress joints need to be set in the filler layer. In traditional construction, the joint cutting process is usually carried out after two passes of static compaction, at which point the filler has not yet initially set and the aggregate is not tightly embedded, making it the optimal time for joint cutting.

[0003] Currently, several cutting devices for BCR rigid filler have been proposed, such as the cutting device proposed in utility model patent CN218880893U entitled "A Cutting Device for Temperature Stress Joints of BCR Rigid Filler". This device includes a handrail support, a force-transmitting cutter, and a low-frequency vibrator. It achieves cutting operations on un-set filler through vibration and extrusion principles, and has advantages such as simple operation, low energy consumption, and close integration with construction procedures.

[0004] However, this existing technology still has the following obvious drawbacks: 1. Limited functionality and lack of follow-up processing capabilities: This device only performs the cutting operation and does not integrate sand filling functionality. In actual construction, sand needs to be poured in immediately after cutting to prevent the joint from closing. Existing technology cannot achieve continuous cutting and sand filling operations, resulting in separation of processes and low efficiency.

[0005] 2. Reliance on manual operation and low degree of automation: The device requires manual pushing of the handrail support to cut the slits. The depth and straightness of the cuts depend on the operator's experience, making it difficult to ensure the consistency of construction quality. In addition, the labor intensity is high and the construction efficiency is limited.

[0006] 3. Cutting quality is greatly affected by human factors: Although the device is equipped with a limit plate to control the cutting depth, in actual construction, uneven cutting depth and skewed seam lines are still likely to occur due to uneven filler layer surface or improper operation, which affects the overall performance of stress joints.

[0007] 4. Failure to consider the requirements for construction continuity and integration: BCR rigid filler construction emphasizes continuous and rapid filling. Although the existing equipment can be connected with the filling process, it cannot achieve integrated operation of cutting joints and filling sand, resulting in interruption of the construction process and affecting the overall construction progress.

[0008] Therefore, there is an urgent need to develop a self-propelled cutting equipment and process that integrates cutting and sand filling functions and has a certain degree of automation, in order to overcome the shortcomings of existing technologies and improve the overall efficiency and quality of BCR rigid filler dam construction. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method that realizes the integrated operation of cutting and sand filling.

[0010] The technical solution adopted to solve the above-mentioned technical problems is: a self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method, including the following steps: A. Construction equipment in place: The construction equipment includes a traveling frame, a control cabinet at the upper rear, a cutting device at the upper middle, a hydraulic system at the upper front, and a sand-filling device at the rear. The cutting device slides along the traveling direction on the traveling frame. The hydraulic system provides hydraulic power to the cutting device, the traveling frame, and the sand-filling device. The control cabinet controls the operation of the cutting device, the hydraulic system, the sand-filling device, and the traveling frame. A1. Measurement and layout: Use limestone powder to lay out the cutting line; A2. Hoisting and centering: Use a loader to hoist the construction equipment to the working face, and manually adjust the centerline of the cutting device 2 of the construction equipment to coincide with the layout line; A3. Adjust the initial state of the equipment: make the inlet and outlet of the sand filling device closed, the walking frame in a walking state, and the hydraulic cylinder of the cutting device in a retracted state. A4. Loading sand: Use an excavator or loader to load the sieved sand into the sand filling device; B. The cutting device performs cutting operations: the hydraulic cylinder of the traveling frame extends to put it in a supported state, the cutting device moves downward relative to the traveling frame until the cutting device contacts the packing panel to form support, the cutting device cutter moves to perform cutting operations, and the cutting device retracts and resets after cutting. Travel and shift: The traveling frame continues to maintain the supported state, the cutting device moves forward relative to the traveling frame. After moving into position, the cutting device moves downward until it contacts the packing panel to form support. The hydraulic cylinder of the traveling frame retracts to reset it. The traveling frame moves forward relative to the cutting device. After moving into position, the hydraulic cylinder of the traveling frame extends to put it back into the supported state. The previous action is repeated to perform the cutting operation. Cutting and Sand Filling Operation: While the cutting device is cutting the slit, the inlet of the sand filling device is opened to allow sand to enter the sand filling device. After the sand filling device is activated and the sand is evenly distributed inside, the outlet of the sand filling device is opened, and the sand enters the slit cut by the cutting operation. After the sand filling operation and the cutting operation are completed synchronously, the valve is closed to stop the sand feeding and discharging, and the cutter of the cutting device retracts and resets. E. Cyclic operation: Repeatedly walk and move, cut and fill with sand until the cutting and filling of sand for the entire panel is completed.

[0011] The walking frame of the present invention includes a frame body, with two sets of walking wheels at the lower part of the frame body. T-shaped slide rails are provided on both the left and right sides of the upper surface of the frame body. Inverted U-shaped pressure bars are provided above the T-shaped slide rails and the ends of the two arms are connected to the frame body. Two sets of crossbars are horizontally provided between the two sets of inverted U-shaped pressure bars. A push frame is provided at the front end of the frame body and a fixed frame is provided at the rear end. A first hydraulic cylinder is horizontally provided on the fixed frame. Four sets of second hydraulic cylinders are inclinedly provided at the four corners of the lower part of the frame body. A frame support block is provided at the end of the piston rod of the second hydraulic cylinder.

[0012] The slitting device of the present invention includes a slitting mounting frame, a slitting unit is disposed at the lower part of the slitting mounting frame via a fourth hydraulic cylinder, a winch is disposed at the upper middle part of the slitting mounting frame and a third hydraulic cylinder is disposed at the upper front end, the steel rope of the winch is connected to the slitting unit, and a slider is disposed on the slitting mounting frame, the slider corresponding to the T-shaped slide rail.

[0013] The slit mounting frame of the present invention includes a mounting frame body, which is a rectangular structure formed by welding four sets of steel sections perpendicularly to each other. Retractable support legs are provided at the four corners of the lower part of the mounting frame body. Slider blocks are provided at both ends of the lower parts of the front and rear sets of steel sections of the mounting frame body. The sliders are located on the outer sides of the retractable support legs. A third hydraulic cylinder is provided at the front end of the front steel section. A winch base is provided in the middle of the mounting frame body. Two sets of fifth hydraulic cylinders are symmetrically and obliquely arranged on the front and rear sides of the lower part of the retractable support legs. A mounting frame support block is provided at the end of the piston rod of the fifth hydraulic cylinder.

[0014] The slitting unit of the present invention consists of a cutter and a cutter fixing device disposed outside the cutter. The cutter includes a cutter head, the upper part of which passes through the slitting vibrator mounting base and is connected to the slitting low-frequency vibrator. The slitting low-frequency vibrator is disposed on the slitting vibrator mounting base. The slitting vibrator mounting base is disposed at the lower part of the counterweight box via a vertical tie rod. The counterweight box is a rectangular structure with an open top and a closed bottom. A partition plate is vertically disposed in the middle of the counterweight box. Two sets of rope holes are machined on the partition plate. The steel rope of the winch is tied to the partition plate through the rope holes. T-shaped sliding rods are disposed at the four corners of the outer side of the counterweight box.

[0015] The cutting blade fixing device of the present invention includes a fixing shell. The upper part of the fixing shell has a rectangular structure and the lower part has a trapezoidal structure. The upper inner corner of the fixing shell is provided with slide rails corresponding to the T-shaped slide rods, and the outer side is provided with a hydraulic cylinder fixing seat. The piston rod end of the fourth hydraulic cylinder is fixed on the hydraulic cylinder fixing seat. The lower part of the fixing shell is provided with a baffle, and the lower middle part of the baffle is provided with a blade sleeve. The cutting head passes through the baffle and the blade sleeve to perform cutting operations.

[0016] The slit-cutting device of the present invention performs slit-cutting operations by comprising the following steps: B1. Walking frame support: The second hydraulic cylinder is activated to make the frame support block make stable contact with the ground; B2. Cutting device support: The telescopic outriggers and the fifth hydraulic cylinder are activated to ensure stable contact between the telescopic outriggers, the mounting bracket support block and the ground. B3. Cutting and Seam Pressing: After the fourth hydraulic cylinder is activated and the cutting unit moves downward into position, the winch is activated to loosen the steel rope. The cutter moves downward along the slide of the cutter fixing device until the cutter head contacts the packing panel. The winch continues to loosen the steel rope until it is in a fully loose state. Then the winch is stopped and the low-frequency vibrator is activated. Under the weight of the counterweight box and the action of the low-frequency vibrator, the cutter head cuts the packing panel until the base of the cutting vibrator moves to the upper surface of the baffle, thus completing the cutting operation. B4. Cutter retraction and reset: The low-frequency vibrator of the cutting slit stops vibrating, the winch is started to reverse and tighten the steel rope, so that the cutter enters the cutter sleeve, and the winch is stopped.

[0017] The walking displacement of the present invention includes the following steps: C1. Displacement of the cutting device: The telescopic outrigger and the fifth hydraulic cylinder are activated, causing the telescopic outrigger and the mounting bracket support block to lift off the ground. The first hydraulic cylinder extends and pushes the sliding device forward along the T-shaped slide rail until the third hydraulic cylinder contacts the pushed frame. C2. Cutting device support: The telescopic outriggers and the fifth hydraulic cylinder are activated to ensure stable contact between the telescopic outriggers, the mounting bracket support block and the ground. C3. Moving frame: The second hydraulic cylinder is activated, the mounting bracket support block is lifted off the ground, the first hydraulic cylinder retracts and the third hydraulic cylinder extends, and the moving frame moves forward until it contacts the first hydraulic cylinder through the force acting on the push frame. C4. Walking frame support: The second hydraulic cylinder is activated to make the frame support block make stable contact with the ground.

[0018] The sand filling device of the present invention includes a sand hopper and a sand feeder. The sand hopper includes a funnel, which is fixed to the traveling frame by a fixed support leg. A knife valve is provided at the bottom of the funnel, and the knife valve is connected to the sand feeder through a feed pipe. The sand feeder includes a sand drop hopper, which is fixed to the traveling frame by a sand hopper mounting bracket. A sand press is provided in the upper part of the sand drop hopper and is mounted on the traveling frame. A screw conveyor is provided in the lower part of the sand drop hopper, and a sealing device is provided on the lower rear side of the sand drop hopper.

[0019] The sand hopper of the present invention includes a sand hopper body. The upper part of the sand hopper body has a rectangular structure and the lower part has a trapezoidal structure. Four sets of guide plates are symmetrically arranged on the inner side of the upper part of the sand hopper body. A limit sleeve is provided at the bottom of the sand hopper body. The sand trough extends into the limit sleeve and can slide up and down along its inner side. Connecting plates are horizontally symmetrically arranged on the front and rear sides of the sand trough. The connecting plates are connected to the end of the piston rod of the sixth hydraulic cylinder. The base of the sixth hydraulic cylinder is connected to the sand hopper mounting frame. The sand hopper mounting frame includes vertical connecting rods. The lower part of the two vertical connecting rods is fixed to the outside of opposite sides of the sand hopper body, and a horizontal connecting rod is arranged between the upper parts.

[0020] The sealing device of the present invention includes sealing side plates, two sealing side plates are arranged opposite each other at a distance, the inner front side of the two sealing side plates is connected to the front sealing plate and the inner rear side is connected to the rear sealing plate, the F-shaped sealing plate is arranged with its opening facing downward on the front sealing plate and its end can extend into the limiting sleeve, the top of the F-shaped sealing plate is connected to the end of the piston rod of the eighth hydraulic cylinder, the base of the eighth hydraulic cylinder is fixed to the inner side of the rear sealing plate, and the F-shaped sealing plate can slide relative to the front sealing plate 5255.

[0021] The sand press of the present invention includes a compaction plate, which is a rectangular plate. Four sets of guide grooves are provided on the compaction plate corresponding to the guide plate. A sand drop vibrator is provided in the middle of the upper surface of the compaction plate. A connecting plate at the upper part of the vibrator plate passes through the compaction plate and is connected to the sand drop vibrator. A seventh hydraulic cylinder is symmetrically arranged on the left and right sides of the upper part of the compaction plate. The base of the seventh hydraulic cylinder is fixedly connected to the walking frame and the sand bucket mounting frame respectively through a U-shaped connecting frame.

[0022] The cutting and sand filling operation of the present invention includes the following steps: D1. Sand conveying: The cutting operation continues. Open the knife valve to let the sand in the funnel enter the sand drop hopper. Under the action of the screw conveyor, the sand is distributed in the sand drop hopper. The seventh hydraulic cylinder is activated to make the compaction plate move downward to compact the sand. At the same time, the sand drop vibrator is turned on to make the sand evenly distributed in the sand drop hopper. D2. Sand enters the gap: Start the sixth hydraulic cylinder to extend the sand drop trough into the cut gap, and retract the eighth hydraulic cylinder to retract the F-shaped sealing plate and disengage it from the limit sleeve. At this time, the sand in the sand drop hopper falls into the cut gap and fills the cut gap under the action of the sand drop vibrator and the gravity of the sand. D3. Stop sand filling and cutting: Extend the eighth hydraulic cylinder to insert the F-shaped sealing plate into the limit sleeve, turn off the sand falling vibrator, retract the sixth hydraulic cylinder to move the sand falling trough upward and away from the packing panel, close the knife valve, and the cutter of the cutting device retracts and resets.

[0023] Compared with the prior art, the present invention has the following advantages: 1. This invention achieves automated integration and seamless connection of the cutting and sand-filling processes, significantly improving construction efficiency. By integrating the cutting and sand-filling devices into one unit and designing a coordinated hydraulic and walking system, a cyclical "cutting-moving-sand-filling" operation is realized. This completely solves the problems of single-function technology and the need to wait for other equipment or manual sand filling after cutting, resulting in process interruptions and low construction efficiency. It is particularly suitable for the rapid and continuous filling rhythm of BCR rigid filler.

[0024] 2. This invention boasts a high degree of automation, significantly reducing labor intensity and ensuring consistent construction quality. Through the coordination of the first and third hydraulic cylinders with the T-shaped slide rail, the automatic and precise positioning and movement of the traveling frame are achieved, replacing the existing technology's operation mode that relies entirely on manual pushing. This not only greatly reduces the labor intensity of operators but also, through automatic mechanical control, effectively avoids problems such as poor straightness and uneven depth of the cut caused by unstable human operation, ensuring stable and reliable cut quality.

[0025] 3. The cutting depth control mechanism of this invention is more precise and reliable. It adopts a combination of "counterweight box gravity sinking + winch coordination + baffle mechanical limit" to control the cutting depth. Compared with the simple limit plate structure in the prior art, this mechanism can better adapt to the slight unevenness of the filler surface, ensuring that the cutter head cuts at a uniform speed and smoothly with the assistance of the low-frequency vibrator, thereby forming a high-quality stress joint with consistent depth and smooth joint wall.

[0026] 4. The sand filling process of this invention is tightly sealed, with uniform material distribution and pre-compaction, effectively ensuring the quality of sand filling. The sand filling device is designed with a sealing structure consisting of an F-shaped sealing plate controlled by an eighth hydraulic cylinder and a limiting sleeve, preventing unexpected leakage of sand. At the same time, the integrated screw conveyor, sand drop vibrator, compaction plate with a seventh hydraulic cylinder, and vibrating plate can evenly distribute and pre-compact the sand, ensuring high density of the sand injected into the joint and preventing it from easily leaking out. This effectively maintains the long-term structural function of the temperature stress joint and prevents the joint from closing due to the pressure of the filler.

[0027] 5. The present invention features a rigid overall structure and high operational stability. By incorporating multiple retractable outriggers and support blocks controlled by hydraulic cylinders, it can provide stable support to the ground at key work positions such as cutting and sand filling, effectively offsetting the vibrations generated by the low-frequency vibrator during operation, preventing equipment displacement or tilting, and ensuring long-term operational stability and reliability during large-scale continuous construction. Attached Figure Description

[0028] Figure 1 This is a flowchart of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the present invention.

[0030] Figure 3 yes Figure 2 The main view.

[0031] Figure 4 yes Figure 2 Top view.

[0032] Figure 5 This is a schematic diagram of the walking frame 1 and the slitting device 2 of the present invention.

[0033] Figure 6 yes Figure 6 A schematic diagram of the structure of the traveling frame 1.

[0034] Figure 7 yes Figure 5 A schematic diagram of the structure of the center cutting device 2.

[0035] Figure 8 yes Figure 7 A schematic diagram of the structure of the center cut mounting bracket 21.

[0036] Figure 9 yes Figure 7 A schematic diagram of the structure of the center slit unit 24.

[0037] Figure 10 yes Figure 9 Schematic diagram of the structure of the middle cutter 241 Figure 1 .

[0038] Figure 11 yes Figure 9 Schematic diagram of the structure of the middle cutter 241 Figure 2 .

[0039] Figure 12 yes Figure 9 A schematic diagram of the structure of the middle cutter fixing device 242.

[0040] Figure 13 yes Figure 2 A schematic diagram of the structure of the sand-filling device 5.

[0041] Figure 14 yes Figure 13 Schematic diagram of the structure of medium sand hopper 51.

[0042] Figure 15 yes Figure 13 Schematic diagram of the structure of the middle sand feeder 52 Figure 1 .

[0043] Figure 16 yes Figure 13 Schematic diagram of the structure of the middle sand feeder 52 Figure 2 .

[0044] Figure 17 yes Figure 15 A schematic diagram of the structure of the sand hopper 522 and the sand hopper mounting frame 523.

[0045] Figure 18 yes Figure 15 Schematic diagram of the structure of medium-pressure sander 524.

[0046] Figure 19 yes Figure 15 A schematic diagram of the structure of the central sealing device 525.

[0047] In the diagram: 1. Walking frame; 2. Cutting device; 3. Hydraulic system; 4. Control cabinet; 5. Sand filling device; 11. Frame body; 12. Walking wheels; 13. Fixed frame; 14. First hydraulic cylinder; 15. Inverted U-shaped pressure bar; 16. Crossbar; 17. T-shaped slide rail; 18. Push frame; 19. Frame support block; 110. Second hydraulic cylinder; 21. Cutting mounting frame; 22. Winch; 23. Third hydraulic cylinder; 24. Cutting unit; 25. Fourth hydraulic cylinder; 26. Slider; 211. Mounting frame body; 212. Winch base; 213. Telescopic outriggers; 214. Fifth hydraulic cylinder; 215. Mounting bracket support block; 241. Cutter; 242. Cutter fixing device; 2411. Cutter head; 2412. Vertical tie rod; 2413. Counterweight box; 2414. T-shaped slide bar; 2415. Divider plate; 2416. Cutting kerf low-frequency vibrator; 2417. Cutting kerf vibrator mounting base; 2421. Fixing shell; 2422. Slide rail; 2423. Baffle; 2424. Cutter sleeve; 2425. Hydraulic cylinder fixing seat; 51. Sand hopper; 52. Sand feeder; 511. Funnel; 512. Fixed support leg; 513. Cutter valve; 514. Feed pipe; 521. Screw conveyor; 522. Sand dropper. 523. Sand bucket mounting frame; 524. Sand press; 525. Sealing device; 5221. Sand dropping bucket body; 5222. Sand dropping trough; 5223. Limiting sleeve; 5224. Connecting plate; 5225. Sixth hydraulic cylinder; 5226. Guide plate; 5231. Horizontal connecting rod; 5232. Vertical connecting rod; 5241. Seventh hydraulic cylinder; 5242. U-shaped connecting frame; 5243. Sand dropping vibrator; 5244. Compactor plate; 5245. Vibrating plate; 5246. Guide groove; 5251. Sealing side plate; 5252. Eighth hydraulic cylinder; 5253. Rear sealing plate; 5254. F-shaped sealing plate; 5255. Front sealing plate. Detailed Implementation

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments. Example 1

[0049] exist Figures 1-4 This invention relates to a self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method, comprising the following steps: A. Construction equipment in place: A1. Measurement and layout: Use limestone powder to lay out the cutting line; A2. Hoisting and centering: Use a loader to hoist the construction equipment to the working face, and manually adjust the centerline of the cutting device 2 of the construction equipment to coincide with the layout line; A3. Adjust the initial state of the equipment: make the inlet and outlet of the sand filling device 5 closed, the walking frame 1 in a walking state, and the hydraulic cylinder of the cutting device 2 in a retracted state. Close the knife valve 513, activate the eighth hydraulic cylinder 5252 to extend, so that the F-shaped sealing plate is inserted into the limiting sleeve 5223, while the other hydraulic cylinders remain in the retracted state. The connecting rod end of the first hydraulic cylinder 14 is in close contact with the cutting device 2, and the sand hopper 522 of the sand filling device 5 is in close contact with the cutting blade fixing device 242 of the cutting device 2.

[0050] A4. Loading sand: The screened sand is loaded into the sand hopper 51 of the sand filling device 5 by an excavator or loader. The aforementioned construction equipment includes a traveling frame 1, with the traveling direction of the traveling frame 1 defined as forward. A control cabinet 4 is installed at the upper rear part of the traveling frame 1, a cutting device 2 is installed at the upper middle part, a hydraulic system 3 is installed at the upper front part, and a sand filling device 5 is installed at the rear end. The cutting device 2 can slide on the traveling frame 1 along the traveling direction. The hydraulic system 3 provides hydraulic power to the cutting device 2, the traveling frame 1, and the sand filling device 5. The control cabinet 4 controls the operation of the cutting device 2, the hydraulic system 3, the sand filling device 5, and the traveling frame 1.

[0051] like Figure 5 , 6 As shown, the walking frame 1 of this embodiment includes a frame body 11. Two sets of walking wheels 12 are provided at the lower part of the frame body 11. T-shaped slide rails 17 are provided on both the left and right sides of the upper surface of the frame body 11. Inverted U-shaped pressure rods 15 are provided above the T-shaped slide rails 17 and the ends of the two arms are connected to the frame body 11. The inverted U-shaped pressure rods prevent the slider 26 from disengaging from the T-shaped slide rails 17 due to the ground reaction force when the telescopic outrigger 213 moves downward, thus preventing the entire equipment from becoming unstable. Two sets of horizontal bars 16 are horizontally arranged between the two sets of inverted U-shaped pressure rods 15. The horizontal bars 16 are used to support the first hydraulic cylinder 14 and the third hydraulic cylinder 23 to prevent them from sagging under the action of gravity. The front end of the frame body 11 is provided with a push frame 18 and the rear end is provided with a fixed frame 13. The fixed frame 13 and the push frame 18 are L-shaped structures. The first hydraulic cylinder 14 is horizontally arranged on the fixed frame 13. In this embodiment, there are two sets of first hydraulic cylinders 14, which are symmetrically arranged on the inner side wall of the L-shaped fixed frame 13 to ensure uniform force. Four sets of second hydraulic cylinders 110 are inclinedly arranged at the four corners of the lower part of the frame body 11. The piston rod end of the second hydraulic cylinder 110 is provided with a frame support block 19. In this embodiment, the cross-sectional shape of the frame support block 19 is an isosceles triangle structure, and the base of the triangle is in contact with the packing panel.

[0052] B. The cutting device performs cutting operation: The hydraulic cylinder of the traveling frame 1 extends to put it in a supporting state, and the cutting device 2 moves downward relative to the traveling frame 1 until the cutting device 2 contacts the packing panel to form support. The cutting blade of the cutting device 2 moves to perform cutting operation. After the cutting device 2 finishes cutting, the cutting blade retracts and resets. exist Figure 7 In this embodiment, the cutting device 2 includes a cutting mounting frame 21, and the cutting unit 24 is disposed at the lower part of the cutting mounting frame 21 by a fourth hydraulic cylinder 25. In this embodiment, four sets of the fourth hydraulic cylinder 25 are provided, two sets are disposed on the left side of the cutting unit 24, and the other two sets are disposed on the right side of the cutting unit 24, and are symmetrically arranged about the cutting unit 24 in pairs.

[0053] like Figure 8 As shown, the slit mounting bracket 21 of this embodiment includes a mounting bracket body 211, which is a rectangular structure formed by welding four sets of steel sections perpendicularly to each other. Each of the four lower corners of the mounting bracket body 211 is provided with a retractable support leg 213, which adopts a structure found in the prior art. Slider blocks 26 are provided at both ends of the lower parts of the front and rear sets of steel sections of the mounting bracket body 211. The sliders 26 are located on the outer side of the retractable support legs 213 and correspond to the T-shaped slide rail 17. A third hydraulic cylinder 23 is provided at the front end of the front steel section. In this embodiment, two sets of third hydraulic cylinders 23 are provided, symmetrically arranged about the slit mounting bracket 21 to ensure uniform force distribution. During operation, the piston rod of the third hydraulic cylinder 23 extends and abuts against the inner side of the push frame 18 to apply force. A winch base 212 is provided in the middle of the mounting frame body 211, and a winch 22 is provided on the winch base 212. Two sets of fifth hydraulic cylinders 214 are symmetrically inclined on the front and rear sides of the lower part of the telescopic support leg 213. The end of the piston rod of the fifth hydraulic cylinder 214 is provided with a mounting frame support block 215. In this embodiment, the mounting frame support block 215 has an isosceles triangle structure in cross-section, and the base of the triangle is in contact with the packing panel.

[0054] like Figure 9As shown, the slitting unit 24 in this embodiment consists of a cutter 241 and a cutter fixing device 242 disposed outside the cutter 241. The cutter 241 includes a blade head 2411. In this embodiment, the blade head 2411 has a rectangular structure, 600mm long, 600mm high, and 12mm thick, with the lower part machined into a cutting edge. The upper part of the blade head 2411 passes through the slitting vibrator mounting base 2417 and is connected to the slitting low-frequency vibrator 2416. The slitting low-frequency vibrator 2416 is disposed on the slitting vibrator mounting base 2417. The slitting vibrator mounting base 2417 has an inverted U-shaped structure and is mounted on the slitting vibrator via a vertical tie rod 2412. The counterweight box 2413 is a rectangular structure with an open top and a closed bottom. Furthermore, a partition plate 2415 is vertically arranged in the middle of the counterweight box 2413. Two sets of rope holes are machined on the partition plate 2415. The steel rope of the winch 22 is tied to the partition plate 2415 through the rope holes. During operation, a counterweight block is added to the counterweight box 2413. When the steel rope of the winch 22 is in a relaxed state, the weight of the counterweight box 2413 and the vibration of the cutting low-frequency vibrator 2416 cause the cutter head 2411 to gradually cut into the filler panel. T-shaped slide bars 2414 are arranged at the four corners of the outer side of the counterweight box 2413. The T-shaped slide bars 2414 correspond to the slide rails 2422.

[0055] like Figures 10-12 As shown, the cutter fixing device 242 of this embodiment includes a fixing shell 2421. The upper part of the fixing shell 2421 has a rectangular structure and the lower part has a trapezoidal structure. The upper inner corner of the fixing shell 2421 is provided with slide rails 2422 corresponding to the T-shaped slide rods 2414, and the outer side is provided with a hydraulic cylinder fixing seat 2425. The piston rod end of the fourth hydraulic cylinder 25 is fixed on the hydraulic cylinder fixing seat 2425. The lower part of the fixing shell 2421 is provided with a baffle 2423. The length and width dimensions of the baffle 2423 in this embodiment are the same as those of the cutting vibrator mounting base 2417. In practice, when the lower part of the cutting vibrator mounting base 2417 moves to the upper part of the baffle 2423, the set cutting depth is reached. The lower middle part of the baffle 2423 is provided with a blade sleeve 2424. The cutter head 2411 passes through the baffle 2423 and the blade sleeve 2424 to perform cutting operations.

[0056] Based on the above structure, the specific steps for the slit cutting device 2 to perform the slit cutting operation are as follows: B1. Walking frame support: The second hydraulic cylinder 110 is activated to make the frame support block 19 make stable contact with the ground; B2. Cutting device support: The telescopic outrigger 213 and the fifth hydraulic cylinder 214 are activated to make the telescopic outrigger 213 and the mounting bracket support block 215 stably contact the ground. B3. Cutting and Seam Pressing: The fourth hydraulic cylinder 25 is activated, causing the cutting unit 24 to move downwards to a suitable distance from the bottom of the packing panel. This distance is adjusted according to the cutting depth. After the bottom of the cutting unit 24 is in place, the winch 22 is activated to loosen the steel rope. Under its own weight, the cutter 1 moves downwards along the slide 2422 of the cutter fixing device 242 until the cutter head 2411 contacts the packing panel. The winch 22 continues to loosen the steel rope until it is in a fully loose state. Then, the winch 22 is stopped and the seam low-frequency vibrator 2416 is activated. Under the gravity of the counterweight box 2413 and the action of the seam low-frequency vibrator 2416, the cutter head 2411 cuts the packing panel until the cutting vibrator mounting base 2417 moves to the upper surface of the baffle 2423, thus completing the cutting operation. B4. Cutter retraction and reset: The low-frequency vibrator (2416) of the cutting slit stops vibrating, the winch 22 is started to reverse and tighten the steel rope, so that the cutter 1 moves upward along the slide 2422 of the cutter fixing device 242 until the cutter head 2411 enters the cutter sleeve 2424, and the winch 22 is stopped.

[0057] C. Travel and shift; The traveling frame 1 continues to maintain the supported state, the cutting device 2 moves forward relative to the traveling frame 1. After moving into position, the cutting device 2 moves downward until it contacts the packing panel to form support. The hydraulic cylinder of the traveling frame 1 retracts to reset it. The traveling frame 1 moves forward relative to the cutting device 2. After moving into position, the hydraulic cylinder of the traveling frame 1 extends to put it back into the supported state. The previous actions are repeated to perform the cutting operation. Specifically, the walking and displacement based on the above structure includes the following steps: C1. Displacement of the cutting device: The telescopic outrigger 213 and the fifth hydraulic cylinder 214 are activated, causing the telescopic outrigger 213 and the mounting bracket support block 215 to lift off the ground. The first hydraulic cylinder 14 extends and pushes the sliding device 2 forward along the T-shaped slide rail 17 until the third hydraulic cylinder 23 contacts the push frame 18. C2. Cutting device support: The telescopic outrigger 213 and the fifth hydraulic cylinder 214 are activated to make the telescopic outrigger 213 and the mounting bracket support block 215 stably contact the ground. C3. Moving the walking frame: The second hydraulic cylinder 110 is activated, the mounting bracket support block 215 is lifted off the ground, the first hydraulic cylinder 14 retracts and the third hydraulic cylinder 23 extends, and the walking frame 1 moves forward to contact the first hydraulic cylinder 14 through the force acting on the push frame 18; at this time, the cutter head 2411 has just moved the distance of its cutting length, and the sand hopper 522 of the sand filling device 5 is exactly above the cutting.

[0058] C4. Walking frame support: The second hydraulic cylinder 110 is activated to make the frame support block 19 make stable contact with the ground.

[0059] Cutting and sand filling operation: While cutting the slit, the inlet of the sand filling device 5 is opened to allow sand to enter the sand filling device 5. After the sand filling device 5 is activated to distribute the sand evenly inside, the outlet of the sand filling device 5 is opened, and the sand enters the slit cut by the cutting operation. After the sand filling operation and the cutting operation are completed synchronously, the valve is closed to stop the sand inlet and outlet, and the cutter of the cutting device 2 retracts and resets. like Figures 13-16 As shown, the sand-filling device 5 in this embodiment includes a sand hopper 51 and a sand feeder 52. The sand hopper 51 includes a funnel 511, which is fixed to the traveling frame 1 by a fixed support leg 512. A knife valve 513 is provided at the bottom of the funnel 511. The knife valve 513 is connected to the sand feeder 52 through a feed pipe 514. By opening the knife valve 513, the sand in the funnel 511 enters the sand feeder 52. The sand feeder 52 includes a sand drop hopper 522. 22 is fixed to the walking frame 1 by the sand hopper mounting bracket 523. A sand press 524 is provided in the upper part of the sand hopper 522 and is installed on the walking frame 1. A screw conveyor 521 is provided in the lower part of the sand hopper 522. The screw conveyor 521 transports the sand entering the sand hopper 522 to the other side of the sand hopper 522. A sealing device 525 is provided on the lower rear side of the sand hopper 522. The sealing device 525 is used to control the falling of sand in the sand hopper 522.

[0060] like Figure 17 As shown, the sand hopper 522 in this embodiment includes a sand hopper body 5221. The upper part of the sand hopper body 5221 has a rectangular structure, and the lower part has a trapezoidal structure. Four sets of guide plates 5226 are symmetrically arranged on the inner side of the upper part of the sand hopper body 5221. A limiting sleeve 5223 is provided at the bottom of the sand hopper body 5221. The sand trough 5222 extends into the limiting sleeve 5223 and can slide up and down along its inner side. The sand trough 5222 has a rectangular hollow structure. The sand in the sand hopper body 5221 falls down along the sand trough 5222 into the slit cut by the cutting device 2. Connecting plates 5224 are horizontally symmetrically arranged on the front and rear sides of the sand trough 5222. The connecting plates 5224 and The piston rod end of the sixth hydraulic cylinder 5225 is connected, and the base of the sixth hydraulic cylinder 5225 is connected to the sand hopper mounting frame 523. The action of the sixth hydraulic cylinder 5225 drives the sand drop trough 5222 to slide up and down, so that it is as close as possible to the cut gap during operation to prevent sand leakage. When moving, it is retracted to avoid scratching the packing panel during movement. The sand hopper mounting frame 523 includes vertical connecting rods 5232. The lower parts of the two vertical connecting rods 5232 are fixed to the outer sides of the opposite sides of the sand drop hopper body 5221, and the upper parts are provided with a horizontal connecting rod 5231. The piston rod end of the sixth hydraulic cylinder 5225 is fixed to the bottom of the vertical connecting rods 5232.

[0061] like Figure 18As shown, the sand press 524 in this embodiment includes a compaction plate 5244, which is a rectangular plate. Four sets of guide grooves 5246 are provided on the compaction plate 5244 corresponding to the guide plate 5226. The guide plate 5226 and the guide grooves 5246 guide the up-and-down sliding of the sand press 524. A sand-falling vibrator 5243 is provided in the middle of the upper surface of the compaction plate 5244. An upper connecting plate of the vibrating plate 5245 passes through the compaction plate 5244 and connects to the sand-falling vibrator 5243. 43 drives the vibrating plate 5245 to slide up and down relative to the compaction plate 5244. The vibration of the sand drop vibrator 5243, combined with the gravity of the sand itself, allows it to smoothly enter the sand drop trough 5222. The size of the vibrating plate 5245 is smaller than the size of the rectangular surface enclosed by the four sets of guide grooves 5246. The compaction plate 5244 has a seventh hydraulic cylinder 5241 symmetrically arranged on the left and right sides of the upper part. The base of the seventh hydraulic cylinder 5241 is fixedly connected to the walking frame 1 and the sand bucket mounting frame 523 respectively through U-shaped connecting frames 5242. In this embodiment, two sets of U-shaped connecting frames 5242 of different lengths are provided. One end of the longer U-shaped connecting frame 5242 is connected to the transverse connecting rod 5231, and one end of the shorter U-shaped connecting frame 5242 is connected to the crossbeam of the walking frame 1.

[0062] like Figure 19 As shown, the sealing device 525 of this embodiment includes sealing side plates 5251. Two sealing side plates 5251 are arranged opposite each other at a distance. The inner front side of the two sealing side plates 5251 is connected to the front sealing plate 5255, and the inner rear side is connected to the rear sealing plate 5253. An F-shaped sealing plate 5254 is disposed with its opening facing downward on the front sealing plate 5255, and its end can extend into the limiting sleeve 5223. The F-shaped sealing plate 5254 can slide relative to the front sealing plate 5255. In order to allow the F-shaped sealing plate 5254 to extend into the limiting sleeve 5223, a rectangular groove is machined on the corresponding side of the upper part of the limiting sleeve 5223. The end of the F-shaped sealing plate 5254 extends into the limiting sleeve 5223 through the rectangular groove. The top of the F-shaped sealing plate 5254 is connected to the piston rod end of the eighth hydraulic cylinder 5252. The components are connected, and the base of the eighth hydraulic cylinder 5252 is fixed inside the rear sealing plate 5253. In this embodiment, there are two sets of eighth hydraulic cylinders 5252, which are symmetrically arranged about the length of the rear sealing plate 5253. The rear sealing plate 5253 has an L-shaped structure. The F-shaped sealing plate 5254 moves back and forth horizontally under the action of the eighth hydraulic cylinder 5252. When it extends into the limiting sleeve 5223, it prevents the sand in the sand hopper 522 from falling. When it retracts from the limiting sleeve 5223, the sand in the sand hopper 522 enters the sand trough 5222. The front sealing plate 5255 is horizontally arranged. On the one hand, it supports the F-shaped sealing plate 5254 to prevent it from sagging under gravity. On the other hand, it acts as a limiting plate to restrict the extension and retraction distance of the F-shaped sealing plate 5254.

[0063] Based on the above structure, the slotting and sand filling operation in this embodiment includes the following steps: D1. Sand conveying: The cutting operation continues. Open the knife valve 513 to allow the sand in the funnel 511 to enter the sand drop hopper 522. Under the action of the screw conveyor 521, the sand is distributed in the sand drop hopper 522. The seventh hydraulic cylinder 5241 is activated to make the compaction plate 5244 move downward to compact the sand. At the same time, the sand drop vibrator 5243 is turned on to make the sand evenly distributed in the sand drop hopper 522. D2. Sand enters the gap: Start the sixth hydraulic cylinder 5225 to extend the sand drop trough 5222 into the cut gap, and retract the eighth hydraulic cylinder 5252 to retract the F-shaped sealing plate 5254 and disengage it from the limit sleeve 5223. At this time, the sand in the sand drop hopper 522 falls into the cut gap and fills the cut gap under the action of the sand drop vibrator 5243 and the gravity of the sand. D3. Stop sand filling and cutting: Extend the eighth hydraulic cylinder 5252 to insert the F-shaped sealing plate 5254 into the limiting sleeve 5223, turn off the sand falling vibrator 5243, retract the sixth hydraulic cylinder 5225 to move the sand falling trough 5222 upward and away from the packing panel, close the knife valve 513, and the cutter of the cutting device 2 retracts and resets.

[0064] E. Cyclic operation: Repeatedly walk and move, cut and fill with sand until the cutting and filling of sand for the entire panel is completed.

Claims

1. A self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method, characterized in that... Includes the following steps: A. Construction equipment in place: The construction equipment includes a traveling frame (1), a control cabinet (4) is provided at the upper rear part of the traveling frame (1), a cutting device (2) is provided at the upper middle part, a hydraulic system (3) is provided at the upper front part, and a sand filling device (5) is provided at the rear end. The cutting device (2) slides on the traveling frame (1) along the traveling direction. The hydraulic system (3) provides hydraulic power to the cutting device (2), the traveling frame (1) and the sand filling device (5). The control cabinet (4) controls the operation of the cutting device (2), the hydraulic system (3), the sand filling device (5) and the traveling frame (1). A1. Measurement and layout: Use limestone powder to lay out the cutting line; A2. Hoisting and centering: Use a loader to hoist the construction equipment to the working face, and manually adjust the centerline of the cutting device (2) of the construction equipment to coincide with the layout line; A3. Adjust the initial state of the equipment: make the inlet and outlet of the sand filling device (5) closed, the walking frame (1) in a walking state, and the hydraulic cylinder of the cutting device (2) in a retracted state. A4. Loading sand: Use an excavator or loader to load the screened sand into the sand filling device (5); B. The cutting device performs cutting operation: The hydraulic cylinder of the traveling frame (1) extends to put it in a supporting state, the cutting device (2) moves downward relative to the traveling frame (1) until the cutting device (2) contacts the packing panel to form support, the cutting device (2) cuts to perform cutting operation, and the cutting device (2) retracts and resets after cutting. C. Walking and shifting: The walking frame (1) continues to maintain the supported state, the cutting device (2) moves forward relative to the walking frame (1), and after moving into position, the cutting device (2) produces a downward displacement until the cutting device (2) contacts the packing panel to form support. The hydraulic cylinder of the walking frame (1) retracts to reset it, and the walking frame (1) moves forward relative to the cutting device (2). After moving into position, the hydraulic cylinder of the walking frame (1) extends to put it back into the supported state, and repeats the previous action to perform the cutting operation. D. Cutting and Sand Filling Operation: While the cutting device (2) is cutting the slit, the inlet of the sand filling device (5) is opened to allow sand to enter the sand filling device (5). After the sand filling device (5) is activated to distribute the sand evenly inside, the outlet of the sand filling device (5) is opened, and the sand enters the slit cut by the cutting operation. After the sand filling operation and the cutting operation are completed synchronously, the valve is closed to stop the sand inlet and outlet, and the cutter of the cutting device (2) retracts and resets. E. Cyclic operation: Repeatedly walk and move, cut and fill with sand until the cutting and filling of sand for the entire panel is completed.

2. The self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method according to claim 1, characterized in that: The walking frame (1) includes a frame body (11). Two sets of walking wheels (12) are provided at the lower part of the frame body (11). T-shaped slide rails (17) are provided on both the left and right sides of the upper surface of the frame body (11). Inverted U-shaped pressure rods (15) are provided above the T-shaped slide rails (17) and the ends of the two arms are connected to the frame body (11). Two sets of crossbars (16) are horizontally provided between the two sets of inverted U-shaped pressure rods (15). A push frame (18) is provided at the front end of the frame body (11) and a fixed frame (13) is provided at the rear end. A first hydraulic cylinder (14) is horizontally provided on the fixed frame (13). Four sets of second hydraulic cylinders (110) are inclinedly provided at the four corners of the lower part of the frame body (11). A frame support block (19) is provided at the end of the piston rod of the second hydraulic cylinder (110).

3. The self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method according to claim 2, characterized in that: The slitting device (2) includes a slitting mounting frame (21). The slitting unit (24) is located at the lower part of the slitting mounting frame (21) via a fourth hydraulic cylinder (25). A winch (22) is located at the upper middle part of the slitting mounting frame (21), and a third hydraulic cylinder (23) is located at the upper front end. The steel rope of the winch (22) is connected to the slitting unit (24). A slider (26) is located on the slitting mounting frame (21), and the slider (26) corresponds to the T-shaped slide rail (17).

4. The self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method according to claim 3, characterized in that: The slit mounting frame (21) includes a mounting frame body (211), which is a rectangular structure formed by welding four sets of steel sections perpendicularly to each other. The four corners of the lower part of the mounting frame body (211) are provided with telescopic support legs (213). The lower ends of the front and rear sets of steel sections of the mounting frame body (211) are provided with sliders (26). The sliders (26) are located on the outside of the telescopic support legs (213). The front end of the front steel section is provided with a third hydraulic cylinder (23). The middle part of the mounting frame body (211) is provided with a winch base (212). The lower front and rear sides of the telescopic support legs (213) are symmetrically and obliquely provided with two sets of fifth hydraulic cylinders (214). The piston rod of the fifth hydraulic cylinder (214) is provided with a mounting frame support block (215). The cutting unit (24) consists of a cutter (241) and a cutter fixing device (242) disposed outside the cutter (241). The cutter (241) includes a cutter head (2411), the upper part of which passes through the cutting vibrator mounting base (2417) and is connected to the cutting low-frequency vibrator (2416). The cutting low-frequency vibrator (2416) is disposed on the cutting vibrator mounting base (2417). 417) A vertical tie rod (2412) is installed at the bottom of the counterweight box (2413). The counterweight box (2413) is a rectangular structure with an open top and a closed bottom. A partition plate (2415) is vertically installed in the middle of the counterweight box (2413). Two sets of rope holes are machined on the partition plate (2415). The steel rope of the winch (22) is tied to the partition plate (2415) through the rope holes. T-shaped sliding rods (2414) are installed at the four corners of the outer side of the counterweight box (2413).

5. The self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method according to claim 4, characterized in that: The cutter fixing device (242) includes a fixing shell (2421). The upper part of the fixing shell (2421) is rectangular and the lower part is trapezoidal. The upper inner corner of the fixing shell (2421) is provided with slide rails (2422) corresponding to the T-shaped slide rods (2414), and the outer side is provided with a hydraulic cylinder fixing seat (2425). The piston rod end of the fourth hydraulic cylinder (25) is fixed on the hydraulic cylinder fixing seat (2425). The lower part of the fixing shell (2421) is provided with a baffle (2423), and the lower middle part of the baffle (2423) is provided with a blade sleeve (2424). The cutter head (2411) passes through the baffle (2423) and the blade sleeve (2424) to perform slit cutting.

6. The self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method according to claim 5, characterized in that... The cutting device performs the cutting operation by including the following steps: B1. Walking frame support: The second hydraulic cylinder (110) is activated to make the frame support block (19) make stable contact with the ground; B2. Cutting device support: The telescopic outrigger (213) and the fifth hydraulic cylinder (214) are activated to make the telescopic outrigger (213) and the mounting bracket support block (215) in stable contact with the ground; B3. Cutting and Seaming: The fourth hydraulic cylinder (25) is started, and the cutting unit (24) moves downward to the position. Then the winch (22) starts to loosen the steel rope. The cutter (241) moves downward along the slide (2422) of the cutter fixing device (242) until the cutter head (2411) contacts the packing panel. The winch (22) continues to loosen the steel rope until it is in a fully loose state. Then the winch (22) stops and the cutting low-frequency vibrator (2416) is started. The cutter head (2411) cuts the packing panel under the gravity of the counterweight box (2413) and the action of the cutting low-frequency vibrator (2416) until the cutting vibrator mounting base (2417) moves to the upper surface of the baffle (2423), and the cutting operation is completed. B4. Cutter retraction and reset: The low-frequency vibrator (2416) of the cutting seam stops vibrating, the winch (22) is started to reverse and tighten the steel rope, so that the cutter (241) enters the cutter sleeve (2424), and the winch (22) is stopped.

7. The self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method according to claim 5, characterized in that: The aforementioned walking and displacement includes the following steps: C1. Displacement of the cutting device: The telescopic outrigger (213) and the fifth hydraulic cylinder (214) are activated, causing the telescopic outrigger (213) and the mounting bracket support block (215) to lift off the ground. The first hydraulic cylinder (14) extends and pushes the sliding device (2) forward along the T-shaped slide rail (17) until the third hydraulic cylinder (23) contacts the push frame (18). C2. Cutting device support: The telescopic outrigger (213) and the fifth hydraulic cylinder (214) are activated to make the telescopic outrigger (213) and the mounting bracket support block (215) in stable contact with the ground; C3. Moving the walking frame: The second hydraulic cylinder (110) is activated, the mounting bracket support block (215) is lifted off the ground, the first hydraulic cylinder (14) is retracted, and the third hydraulic cylinder (23) is extended. The force acting on the push frame (18) causes the walking frame (1) to move forward until it contacts the first hydraulic cylinder (14). C4. Walking frame support: The second hydraulic cylinder (110) is activated to make the frame support block (19) make stable contact with the ground.

8. The self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method according to claim 1, characterized in that: The sand filling device (5) includes a sand hopper (51) and a sand feeder (52). The sand hopper (51) includes a funnel (511), which is fixed to the walking frame (1) by a fixed support leg (512). A knife valve (513) is provided at the bottom of the funnel (511), and the knife valve (513) is connected to the sand feeder (52) through a feed pipe (514). The sand feeder (52) includes a sand drop hopper (522), which is fixed to the walking frame (1) by a sand hopper mounting bracket (523). A sand presser (524) is provided in the upper part of the sand drop hopper (522), which is installed on the walking frame (1). A screw conveyor (521) is provided in the lower part of the sand drop hopper (522), and a sealing device (525) is provided on the lower rear side of the sand drop hopper (522). The sand hopper (522) includes a sand hopper body (5221). The upper part of the sand hopper body (5221) has a rectangular structure, and the lower part has a trapezoidal structure. Four sets of guide plates (5226) are symmetrically arranged on the inner side of the upper part of the sand hopper body (5221). A limiting sleeve (5223) is provided at the bottom of the sand hopper body (5221). The sand trough (5222) extends into the limiting sleeve (5223) and can slide up and down along its inner side. The front and rear sides of the sand trough (5222) A connecting plate (5224) is symmetrically arranged horizontally. The connecting plate (5224) is connected to the end of the piston rod of the sixth hydraulic cylinder (5225). The base of the sixth hydraulic cylinder (5225) is connected to the sand hopper mounting frame (523). The sand hopper mounting frame (523) includes vertical connecting rods (5232). The lower parts of the two vertical connecting rods (5232) are fixed to the outside of opposite sides of the sand hopper body (5221), and a horizontal connecting rod (5231) is arranged between the upper parts. The sealing device (525) includes sealing side plates (5251), two sealing side plates (5251) are arranged opposite each other at intervals, the inner front side of the two sealing side plates (5251) is connected to the front sealing plate (5255), and the inner rear side is connected to the rear sealing plate (5253). The F-shaped sealing plate (5254) is set with its opening facing downward on the front sealing plate (5255) and its end can extend into the limiting sleeve (5223). The top of the F-shaped sealing plate (5254) is connected to the end of the piston rod of the eighth hydraulic cylinder (5252). The base of the eighth hydraulic cylinder (5252) is fixed to the inner side of the rear sealing plate (5253). The F-shaped sealing plate (5254) can slide relative to the front sealing plate (5255).

9. The self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method according to claim 8, characterized in that: The sand press (524) includes a compaction plate (5244), which is a rectangular plate. Four sets of guide grooves (5246) are provided on the compaction plate (5244) corresponding to the guide plate (5226). A sand drop vibrator (5243) is provided in the middle of the upper surface of the compaction plate (5244). The upper connecting plate of the vibrating plate (5245) passes through the compaction plate (5244) and is connected to the sand drop vibrator (5243). A seventh hydraulic cylinder (5241) is symmetrically arranged on the left and right sides of the upper part of the compaction plate (5244). The base of the seventh hydraulic cylinder (5241) is fixedly connected to the walking frame (1) and the sand bucket mounting frame (523) respectively through the U-shaped connecting frame (5242).

10. The self-propelled rigid filler temperature stress joint cutting and sand filling integrated construction method according to claim 9, characterized in that: The aforementioned slit filling and sand filling operation includes the following steps: D1. Sand conveying: The cutting operation continues. Open the knife valve (513) to allow the sand in the funnel (511) to enter the sand drop hopper (522). Under the action of the screw conveyor (521), the sand is distributed in the sand drop hopper (522). The seventh hydraulic cylinder (5241) is activated to make the compaction plate (5244) move downward to compact the sand. At the same time, the sand drop vibrator (5243) is turned on to make the sand evenly distributed in the sand drop hopper (522). D2. Sand into the gap: Start the sixth hydraulic cylinder (5225) to extend the sand drop trough (5222) into the cut gap, and retract the eighth hydraulic cylinder (5252) to retract the F-shaped sealing plate (5254) and disengage it from the limiting sleeve (5223). At this time, the sand in the sand drop hopper (522) falls into the cut gap and fills the cut gap under the action of the sand drop vibrator (5243) and the gravity of the sand. D3. Stop sand filling and cutting: Extend the eighth hydraulic cylinder (5252) to insert the F-shaped sealing plate (5254) into the limiting sleeve (5223), turn off the sand falling vibrator (5243), retract the sixth hydraulic cylinder (5225) to make the sand falling trough (5222) move upward and get away from the packing panel, close the knife valve (513), and the cutter of the cutting device (2) retracts and resets.

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