A road foundation pit drainage device

Abstract

The present invention discloses a road foundation pit drainage device, which relates to the technical field of foundation pit drainage, and comprises a frame installed on a traveling mechanism, a splicing mechanism and a stone box installed on the frame, a laying mechanism installed on the splicing mechanism, the splicing mechanism comprising a box body, a baffle plate arranged in the box body, an opening for a geotextile tube to pass through arranged on the baffle plate, a storage cavity and a splicing cavity on both sides of the baffle plate respectively, the bottom plate of the storage cavity is inclinedly arranged and a plurality of geotextile tubes are placed thereon, all the geotextile tubes are placed in the same direction, and the bottom plate of the splicing cavity is inclinedly arranged; the present invention flattens and compacts the gravels through a movable compacting assembly, flattens the gravels in the blind ditch through two flat shovels, and then compacts the flattened gravels through a roller at the rear, thereby improving the drainage efficiency of the blind ditch and preventing excessive mixing of silt into the blind ditch to affect the drainage efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit drainage, and particularly relates to a road foundation pit drainage device. Background Art

[0002] The drainage of roadside foundation pits aims to effectively drain the accumulated water in the pits during construction to ensure the smooth progress and safety of the project. There are several common drainage methods, one of which is blind ditch drainage. Blind ditch drainage is usually used at the foundation pit positions beside urban roads to avoid affecting the urban beauty during construction. Currently, the common construction method of blind ditch drainage is to set up a buried ditch filled with gravel and coarse sand inside or around the foundation pit, and bury drainage pipes in the buried ditch to collect and drain the water through the pipes in the ditch.

[0003] Generally, the method of blind ditch drainage requires ramming the soil in the blind ditch, installing and splicing multiple sections of drainage pipes together, then laying gravel in the ditch, and finally backfilling. Currently, when laying drainage pipes, artificial sand filling is commonly used, and the drainage pipes are connected one by one. Due to different construction standards, inappropriate connection methods make most of the drainage pipes relatively bent and their positions not fixed after connection, wasting time and energy while also having a poor construction effect. Therefore, the present invention provides a road foundation pit drainage device. Summary of the Invention

[0004] Aiming at the defects in the prior art, the present invention provides a road foundation pit drainage device to overcome the problems in the prior art.

[0005] The technical solution adopted by the present invention is as follows: A road foundation pit drainage device includes a vehicle frame installed on a traveling mechanism. A splicing mechanism and a stone box are installed on the vehicle frame, and a laying mechanism is installed on the splicing mechanism. The splicing mechanism includes a box body. A partition board is arranged inside the box body, and an opening for a geotextile tube to pass through is arranged on the partition board. Drainage holes are evenly distributed on the geotextile tube, and a geotextile is wrapped on the outer surface of the geotextile tube. A connecting ring is arranged on the geotextile tube. The two sides of the partition board are respectively a storage cavity and a splicing cavity. The bottom plate of the storage cavity is inclined and multiple geotextile tubes are placed on it. All the geotextile tubes are placed in the same direction. The bottom plate of the splicing cavity is inclined; in the working state, the bottom plate of the splicing cavity and the guide plate are on the same inclined plane. The first end of the guide plate is fixedly installed with a moving block, and the moving block is slidably installed in the sliding frame. The moving path of the moving block is parallel to the inclined plane of the bottom plate of the splicing cavity. The sliding frame is slidably connected with multiple fixed blocks, and the fixed blocks are installed on the box body. A cross plate is installed on the sliding frame, and the cross plate cooperates with an irregular rod. The irregular rod is provided with a straight section and an inclined section. The irregular rod is connected to the fixed block close to the cross plate through a return spring. A cooperating rod is installed on the moving block, and the cooperating rod cooperates with the irregular rod. The irregular rod is slidably installed on the box body; the second end of the guide plate is provided with a connecting shaft, and the connecting shaft is slidably installed in the guide groove of the U-shaped frame. The U-shaped frame is rotatably installed on the vertical rod, and the vertical rod is fixedly installed on the box body. The guide plate is connected to a ramming assembly.

[0006] Furthermore, the size of the splicing cavity matches the diameter of the geotextile tube.

[0007] Furthermore, the tamping assembly includes a horizontal column fixedly mounted on the guide plate, the horizontal column is rotatably connected to the sliding rod, the sliding rod is slidably connected to the tamping frame, a roller is rotatably mounted on the tamping frame, two sliding shafts are fixedly mounted on the tamping frame, a flat shovel is slidably mounted on each sliding shaft, and the two flat shovels are respectively connected to the tamping frame via an extrusion spring.

[0008] Furthermore, each of the flat shovels is provided with a card slot, the card slot matches the card frame, the card frame is fixedly mounted on the side pressure plate, and in the working state, the card frame is inserted into the card slot.

[0009] Furthermore, inclined sections are symmetrically arranged at both ends of the side pressure plate, and the inclined direction is toward the tamping frame. There are two side pressure plates symmetrically distributed on both sides of the tamping frame. A hydraulic cylinder is installed on the sliding rod, and the piston rod of the hydraulic cylinder is connected to the tamping frame.

[0010] Furthermore, the splicing mechanism includes a push plate slidably mounted on the box body, the push plate is threadedly connected to the bidirectional lead screw, the size of the push plate matches the splicing cavity, a rack is fixedly mounted on the push plate, the rack cooperates with a gear, the gear is rotatably mounted on the box body, and the gear is connected to the cam through a belt assembly.

[0011] Furthermore, the cam cooperates with the matching frame, the matching frame is connected to the connecting rod, the connecting rod is slidably installed on the box body, a downward pressure arc plate is arranged on the connecting rod, and an anti-slip elastic material is arranged on the downward pressure arc plate.

[0012] Furthermore, a yield plate is slidably installed in the storage cavity, and the yield plate is connected to the box body through a yield spring.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: (1) In the present invention, multiple geotextile tubes are connected and slide along the guide plate. The multiple geotextile tubes press on the guide plate, bringing pressure to the compaction component, enabling the compaction component to compact the land more firmly. The position of the geotextile tubes is limited by the splicing cavity and will not shift randomly, thereby restricting the position of the drain pipe relative to the blind ditch; (2) To ensure the flatness and firmness of the blind ditch foundation and provide sufficient support for the drain pipe, the bottom and both sides of the blind ditch need to be compacted. When the device moves, gravel is first discharged into the blind ditch, and then the moving compaction component levels and compacts these gravels. The gravels in the blind ditch are leveled by two flat shovels, and then the leveled gravels are compacted by the rollers at the rear. After laying a layer of gravel in this way, the drain pipe is placed, improving the drainage efficiency of the blind ditch and avoiding excessive mixing of silt into the blind ditch, which affects the drainage efficiency; (3) After the compaction component enters the blind ditch in the present invention, the two side pressing plates respectively fit the soil on both sides of the blind ditch, and the loose soil on both sides is extruded by the elastic force of the compression spring; (4) In the present invention, the anti-slip elastic material on the downward pressing arc plate presses down the geotextile tube directly below the downward pressing arc plate, causing the pressed geotextile tube to stop moving for a preset time. At this time, the push plate is still pushing the geotextile tube. Under the push of the push plate, the connecting ring at the front end of the latter geotextile tube is inserted into the tail end of the previous geotextile tube, achieving the connection of the two geotextile tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of a partial structure of the splicing mechanism of the present invention Figure 1 。

[0016] Figure 3 It is a schematic diagram of the non-working state structure of the present invention.

[0017] Figure 4 It is a schematic diagram of the working state structure of the present invention.

[0018] Figure 5 It is a schematic diagram of the storage cavity and splicing cavity structure of the present invention.

[0019] Figure 6 It is a schematic diagram of a partial structure of the splicing mechanism of the present invention Figure 2 。

[0020] Figure 7 It is a schematic diagram of a partial structure of the splicing mechanism and laying mechanism of the present invention.

[0021] Figure 8 For Figure 4 The partial enlarged structure schematic diagram at position A in

[0022] Figure 9 It is a schematic diagram of a partial sectional structure of the laying mechanism of the present invention.

[0023] Figure 10 is Figure 9 The partial enlarged structural schematic diagram at position B in

[0024] Figure 11 The partial exploded structural schematic diagram of the ramming component of the present invention.

[0025] Figure 12 The partial structural schematic diagram of the ramming component of the present invention.

[0026] Figure 13 The partial structural schematic diagram of the sliding frame of the present invention.

[0027] Reference numerals: 1 - splicing mechanism; 2 - laying mechanism; 3 - stone box; 4 - geotextile tube; 101 - box body; 102 - motor 1; 103 - partition board; 104 - bidirectional lead screw; 105 - push plate; 106 - rack; 107 - relief plate; 108 - relief spring; 109 - gear; 110 - belt assembly; 111 - cam; 112 - mating frame; 113 - connecting rod; 114 - downward pressing arc plate; 115 - storage cavity; 116 - splicing cavity; 201 - fixed block; 202 - sliding frame; 203 - motor 2; 204 - long lead screw; 205 - vertical rod; 206 - U-shaped frame; 207 - guide plate; 208 - mating rod; 209 - return spring; 210 - irregular rod; 211 - cross plate; 212 - moving block; 213 - slide bar; 214 - connecting shaft; 215 - ramming frame; 216 - hydraulic cylinder; 217 - roller; 218 - side pressing plate; 219 - flat shovel; 220 - card slot; 221 - extrusion spring; 222 - card holder; 223 - sliding shaft; 224 - cross column. Detailed implementation manners

[0028] The present invention will be further described below with reference to the accompanying drawings and exemplary embodiments. The schematic embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention. In addition, if a detailed description of the known art is not necessary for showing the features of the present invention, it will be omitted.

[0029] Embodiment: Refer to Figures 1-13The road foundation pit drainage device shown in the figure comprises a frame installed on a walking mechanism, a splicing mechanism 1 and a stone box 3 are installed on the frame, gravel is placed in the stone box 3, a discharge assembly is arranged on the stone box 3, a laying mechanism 2 is installed on the splicing mechanism 1, the splicing mechanism 1 comprises a box body 101, a motor 102, a blocking plate 103, a bidirectional screw 104, a push plate 105, a rack 106, a yield plate 107, a yield spring 108, a gear 109, a belt assembly 110, a cam 111, a matching frame 112, a connecting rod 113, a downward pressure arc plate 114, a storage chamber 115, and a splicing chamber 116; the laying mechanism 2 comprises a fixed block 201, a sliding frame 202, a motor 203, a long screw 204, a vertical rod 205 , U-shaped frame 206, guide plate 207, matching rod 208, return spring 209, irregular rod 210, cross plate 211, moving block 212, connecting shaft 214; a blocking plate 103 is installed in the box body 101, and an opening for the geotextile tube 4 to pass through is arranged on the blocking plate 103, the opening length of the blocking plate 103 is larger than the length of one geotextile tube 4 and smaller than the sum of the lengths of two geotextile tubes 4, the opening width of the blocking plate 103 is larger than the diameter of one geotextile tube 4 and smaller than the sum of the diameters of two geotextile tubes 4, the opening position of the blocking plate 103 is at the end away from the compaction component, the geotextile tube 4 is evenly distributed with drainage holes, the outer surface of the geotextile tube 4 is wrapped with geotextile, and a connecting ring is arranged at one end of the geotextile tube 4, All geotextile tubes 4 can be plugged into each other through the connecting ring, and the plug-in position is tight and tight. The two sides of the barrier plate 103 are respectively a storage chamber 115 and a splicing chamber 116. The storage chamber 115 and the splicing chamber 116 are located in the box body 101. The bottom plate of the storage chamber 115 is tilted and multiple geotextile tubes 4 are placed thereon. All geotextile tubes 4 are placed in the same direction, and the bottom plate of the splicing chamber 116 is tilted. In the working state, the bottom plate of the splicing chamber 116 and the guide plate 207 are on the same inclined surface, and a moving block 212 is fixedly installed on the first end of the guide plate 207. The moving block 212 is slidably installed in the sliding frame 202. The moving block 212 is threadedly connected to the long lead screw 204, and the long lead screw 204 is rotatably installed on the sliding frame 202. The lead screw 204 is connected to the output shaft of the second motor 203, the second motor 203 is installed on the sliding frame 202, the moving path of the moving block 212 is parallel to the inclined surface of the bottom plate of the splicing cavity 116, the sliding frame 202 is slidably connected with a plurality of fixed blocks 201, the fixed blocks 201 are installed on the box body 101, a transverse plate 211 is installed on the sliding frame 202, the transverse plate 211 cooperates with the irregular rod 210, the irregular rod 210 is provided with a straight section and an oblique section, the irregular rod 210 is connected to the fixed block 201 close to the transverse plate 211 through a return spring 209, a matching rod 208 is installed on the moving block 212, the matching rod 208 cooperates with the irregular rod 210, and the irregular rod 210 is slidably installed on the box body 101;The second end of the guide plate 207 is provided with a connecting shaft 214, which is slidably mounted in the guide groove of the U-shaped frame 206, and the U-shaped frame 206 is rotatably mounted on the vertical rod 205, and the vertical rod 205 is fixedly mounted on the box body 101, and the guide plate 207 is connected to the tamping assembly. ;

[0030] The size of the splicing cavity 116 matches the diameter of the geotextile tube 4 .

[0031] The tamping assembly includes a slide bar 213, a tamping frame 215, a hydraulic cylinder 216, a roller 217, a side pressure plate 218, a flat shovel 219, a slot 220, an extrusion spring 221, a frame 222, a sliding shaft 223, and a cross column 224; the cross column 224 is fixedly mounted on the guide plate 207, the cross column 224 is rotatably connected to the slide bar 213, the slide bar 213 is slidably connected to the tamping frame 215, the roller 217 is rotatably mounted on the tamping frame 215, two sliding shafts 223 are fixedly mounted on the tamping frame 215, each sliding shaft 223 is slidably mounted with a flat shovel 219, and the two flat shovels 219 are respectively connected to the tamping frame 215 through an extrusion spring 221.

[0032] Each flat shovel 219 is provided with a slot 220 , which matches with a bracket 222 . The bracket 222 is fixedly mounted on the side pressure plate 218 . In the working state, the bracket 222 is inserted into the slot 220 .

[0033] The two ends of the side pressure plate 218 are symmetrically provided with inclined sections, and the inclined direction of the inclined sections of the side pressure plate 218 is toward the tamping frame 215. The side pressure plate 218 has two symmetrically distributed on both sides of the tamping frame 215. A hydraulic cylinder 216 is installed on the sliding rod 213, and the piston rod of the hydraulic cylinder 216 is connected to the tamping frame 215.

[0034] The push plate 105 is slidably installed on the box body 101, the push plate 105 is threadedly connected to the bidirectional screw 104, the bidirectional screw 104 is connected to the output shaft of the motor 102, the motor 102 is installed on the box body 101, the size of the push plate 105 matches the splicing cavity 116, and a rack 106 is fixedly installed on the push plate 105, the rack 106 cooperates with the gear 109, the gear 109 is rotatably installed on the box body 101, and the gear 109 is connected to the cam 111 through the belt assembly 110.

[0035] The cam 111 is rotatably mounted on the box body 101 , the cam 111 is matched with the matching frame 112 , the matching frame 112 is connected with the connecting rod 113 , the connecting rod 113 is slidably mounted on the box body 101 , a lower arc pressure plate 114 is provided on the connecting rod 113 , and an anti-slip elastic material is provided on the lower arc pressure plate 114 .

[0036] A clearance plate 107 is slidably installed in the storage cavity 115 , and the clearance plate 107 is connected to the box body 101 via a clearance spring 108 .

[0037] The working principle of the present invention is as follows: In the present invention, the geotextile tube 4 is a rigid tube; the device is installed on a traveling mechanism and driven by the traveling mechanism to move to the position of the dug blind ditch. When the device moves, the first layer of gravel is laid in the blind ditch through the discharging mechanism on the stone box 3.

[0038] Start the second motor 203 to drive the long lead screw 204 to rotate, drive the moving block 212 to slide in the sliding frame 202, the moving block 212 drives the mating rod 208 to move towards the irregular rod 210, drive the guide plate 207 to move, the movement of the guide plate 207 causes the U-shaped frame 206 to rotate. After the mating rod 208 moves a preset distance, it contacts the irregular rod 210, pushes the irregular rod 210 to slide, compresses the return spring 209, drives the oblique section on the irregular rod 210 to contact the cross plate 211, and pushes the cross plate 211 to move upward. The cross plate 211 drives the sliding frame 202 to move upward, and the sliding frame 202 drives the moving block 212 and the guide plate 207 to move upward until the cross plate 211 contacts the straight section of the irregular rod 210. At this time, the position of the sliding frame 202 is stable, and the upper surface of the guide plate 207 is on the same inclined plane as the bottom plate of the splicing cavity 116.

[0039] Subsequently, the second motor 203 stops running. At this time, the connecting shaft 214 slides to the end position of the guide groove of the U-shaped frame 206, and the stability of the guide plate 207 is increased through the U-shaped frame 206.

[0040] The guide plate 207 drives the ramming assembly to move, so that the ramming assembly enters the blind ditch. To ensure the flatness and firmness of the blind ditch foundation and provide sufficient support for the drainage pipe, it is necessary to ram the bottom and both sides of the blind ditch. When the device moves, gravel is first discharged into the blind ditch, and then the moving ramming assembly levels and rams these gravels. The gravels in the blind ditch are leveled by two flat shovels 219, and then the leveled gravels are rammed by the rollers 217 at the rear. After laying a layer of gravel in this way, the drainage pipe is placed, which improves the drainage efficiency of the blind ditch and avoids excessive mixing of silt into the blind ditch, which affects the drainage efficiency; after the ramming assembly enters the blind ditch, the two side pressing plates 218 are respectively attached to the soil on both sides of the blind ditch, and the loose soil on both sides is extruded by the elastic force of the compression spring 221.

[0041] Under normal conditions, due to the inclination of the bottom plate of the storage cavity 115, the geotextile tube 4 in the storage cavity 115 rolls towards the splicing cavity 116. Due to the obstruction of the blocking plate 103, only one geotextile tube 4 rolls into the splicing cavity 116 each time. The first motor 102 is started to drive the bidirectional lead screw 104 to rotate. The bidirectional lead screw 104 drives the push plate 105 to slide in the splicing cavity 116. The push plate 105 pushes the geotextile tube 4 that has rolled to the corresponding position to move a length of one geotextile tube 4 and then return to the initial position. During the process of the push plate 105 pushing the geotextile tube 4, since the push plate 105 blocks the opening position of the blocking plate 103, the remaining geotextile tubes 4 cannot roll into the splicing cavity 116. When the push plate 105 returns to the initial position, there is no obstruction at the opening position of the blocking plate 103, and at this time the remaining geotextile tubes 4 can continue to roll into the splicing cavity 116.

[0042] The movement of the push plate 105 drives the movement of the rack 106. After the rack 106 moves to the preset position, it meshes with the gear 109, driving the gear 109 to rotate. The gear 109 drives the cam 111 to rotate through the belt assembly 110. The rotation of the cam 111 drives the cooperation frame 112 to move up and down. When the cooperation frame 112 moves down, it drives the connecting rod 113 and the downward pressing arc plate 114 to move down. The structural design of the cam 111 enables the cooperation frame 112 to stay at the lowest point for a preset time. The anti-slip elastic material on the downward pressing arc plate 114 presses down the geotextile tube 4 directly below the downward pressing arc plate 114, so that the pressed geotextile tube 4 stops moving for a preset time. At this time, the push plate 105 is still continuing to push the geotextile tube 4. Under the push of the push plate 105, the connecting ring at the front end of the latter geotextile tube 4 is inserted into the tail end of the previous geotextile tube 4, achieving the purpose of connecting two geotextile tubes 4.

[0043] The connected multiple geotextile tubes 4 slide along the guide plate 207. The multiple geotextile tubes 4 press on the guide plate 207, bringing pressure to the ramming assembly, so that the ramming assembly presses the land more firmly. The position of the geotextile tube 4 is limited by the splicing cavity 116 and will not be displaced randomly, thereby restricting the position of the drain pipe relative to the blind ditch.

[0044] As more and more geotextile tubes 4 are spliced together and the drainage pipeline becomes longer, when the first geotextile tube 4 contacts the wall of the blind ditch, the traveling mechanism drives the device to move, and the ground is compacted during the movement until all the geotextile tubes 4 are spliced. Then, the second motor 203 is started to reverse, driving the moving block 212 to move in the direction of the first motor 102, driving the cooperating rod 208 away from the irregular rod 210. At this time, the irregular rod 210 is reset under the elastic force of the return spring 209, and the irregular rod 210 is disengaged from the contact with the cross plate 211. The cross plate 211 and the sliding frame 202 move downward under the gravity of the guide plate 207. Without the support of the irregular rod 210, the cross plate 211 falls on the fixed block 201 under the action of gravity. The cross plate 211 drives the sliding frame 202 to move downward, driving the moving block 212 and the guide plate 207 to move downward, driving the guide plate 207 to move in the direction of the fixed block 201, recovering the guide plate 207 under the box body 101, and the guide plate 207 drives the compaction component to move.

[0045] By starting the hydraulic cylinder 216 to extend the piston rod, the compaction frame 215 is pushed to slide relative to the sliding rod 213, driving the compaction frame 215 away from the blind ditch. At this time, the equipment recovery is completed. During the recovery process, the guide plate 207 is disengaged from the connected geotextile tubes 4, and the geotextile tubes 4 fall on the paved gravel. Subsequently, the stone box 3 is filled with gravel to complete the blind ditch drainage setting.

[0046] The traveling mechanism drives the device to complete the laying of the water pipe for the next blind ditch.

Claims

1. A road foundation pit drainage device, comprising a frame mounted on a traveling mechanism, a splicing mechanism (1) and a stone box (3) mounted on the frame, a laying mechanism (2) mounted on the splicing mechanism (1), the splicing mechanism (1) comprising a box body (101), a baffle plate (103) arranged inside the box body (101), an opening for a geotextile tube (4) to pass through arranged on the baffle plate (103), drainage holes evenly distributed on the geotextile tube (4), the outer surface of the geotextile tube (4) being wrapped with geotextile, characterized in that: A connecting ring is provided on the geotextile tube (4); the two sides of the barrier plate (103) are respectively a storage chamber (115) and a splicing chamber (116); the bottom plate of the storage chamber (115) is arranged obliquely and a plurality of geotextile tubes (4) are placed thereon; all the geotextile tubes (4) are arranged in the same direction; the bottom plate of the splicing chamber (116) is arranged obliquely; in a working state, the bottom plate of the splicing chamber (116) and the guide plate (207) are located on the same inclined surface; a moving block (212) is fixedly installed on the first end of the guide plate (207); the moving block (212) is slidably installed in a sliding frame (202); the moving path of the moving block (212) is parallel to the inclined surface of the bottom plate of the splicing chamber (116); the sliding frame (202) is slidably connected to a plurality of fixed blocks (201); the fixed blocks (201) are installed on a box body (101); and the sliding frame (202) is arranged to move the moving block (212) in parallel with the inclined surface of the bottom plate of the splicing chamber (116); ) is mounted on a horizontal plate (211), the horizontal plate (211) cooperates with an irregular rod (210), the irregular rod (210) is provided with a straight section and an oblique section, the irregular rod (210) is connected to a fixed block (201) close to the horizontal plate (211) via a return spring (209), a matching rod (208) is mounted on the moving block (212), the matching rod (208) cooperates with the irregular rod (210), and the irregular rod (210) is slidably mounted on the box body (101); a connecting shaft (214) is provided at the second end of the guide plate (207), the connecting shaft (214) is slidably mounted in a guide groove of a U-shaped frame (206), the U-shaped frame (206) is rotatably mounted on a vertical rod (205), the vertical rod (205) is fixedly mounted on the box body (101), and the guide plate (207) is connected to a tamping assembly.

2. A road foundation pit drainage device as claimed in claim 1, characterized in that: The size of the splicing cavity (116) matches the diameter of the geotextile tube (4).

3. A road foundation pit drainage device as claimed in claim 2, characterized in that: The tamping assembly comprises a cross column (224) fixedly mounted on the guide plate (207), the cross column (224) being rotatably connected to the slide bar (213), the slide bar (213) being slidably connected to the tamping frame (215), a roller (217) being rotatably mounted on the tamping frame (215), two sliding shafts (223) being fixedly mounted on the tamping frame (215), a flat shovel (219) being slidably mounted on each sliding shaft (223), and the two flat shovels (219) being respectively connected to the tamping frame (215) via a compression spring (221).

4. A road foundation pit drainage device as claimed in claim 3, characterized in that: Each of the flat shovels (219) is provided with a card slot (220), the card slot (220) matches a card frame (222), the card frame (222) is fixedly mounted on the side pressure plate (218), and in a working state, the card frame (222) is inserted into the card slot (220).

5. A road foundation pit drainage device as claimed in claim 4, characterized in that: The two ends of the side pressure plate (218) are symmetrically provided with inclined sections, the inclined direction being toward the tamping frame (215), the side pressure plate (218) has two symmetrically distributed on both sides of the tamping frame (215), the sliding rod (213) is mounted with a hydraulic cylinder (216), and the piston rod of the hydraulic cylinder (216) is connected to the tamping frame (215).

6. A road foundation pit drainage device as claimed in claim 5, characterized in that: The splicing mechanism (1) comprises a push plate (105) slidably mounted on a box body (101), the push plate (105) being threadedly connected to a bidirectional lead screw (104), the size of the push plate (105) matching that of a splicing cavity (116), a rack (106) being fixedly mounted on the push plate (105), the rack (106) cooperating with a gear (109), the gear (109) being rotatably mounted on the box body (101), and the gear (109) being connected to a cam (111) via a belt assembly (110).

7. A road foundation pit drainage device as claimed in claim 6, characterized in that: The cam (111) cooperates with the matching frame (112), the matching frame (112) is connected to the connecting rod (113), the connecting rod (113) is slidably mounted on the box body (101), a downward pressure arc plate (114) is provided on the connecting rod (113), and an anti-slip elastic material is provided on the downward pressure arc plate (114).

8. A road foundation pit drainage device as claimed in claim 7, characterized in that: A clearance plate (107) is slidably mounted in the storage cavity (115), and the clearance plate (107) is connected to the box body (101) via a clearance spring (108).

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