A water level control device for deep foundation pit sandy soil excavation

Abstract

The present invention provides a water level control device for excavating sandy soil in a deep foundation pit. The water level control device for excavating sandy soil in a deep foundation pit comprises a foundation pit; a main body; a filtering mechanism, the bottom end of the main body is rotatably connected to the support ring, the tooth plates distributed in a ring are equidistantly installed inside the support ring, and the first gear respectively engages with the tooth plates and the second gear; the side walls of the base and the support ring are respectively equidistantly fixedly connected to the support rod and the support net, the side walls of the support rod are installed with the support net, and the side walls of the support net are sleeved with the geotextile layer; a compression mechanism; a connecting mechanism; a suction mechanism, the side walls of the geotextile layer are slidably connected to the fixed plate and the rubber strip, and the rubber strip is installed inside the fixed plate with an arc-shaped side wall; a storage mechanism; an adjusting mechanism. The water level control device for excavating sandy soil in a deep foundation pit provided by the present invention has the advantages of effectively preventing clogging of the geotextile surface and improving the precipitation effect.

Description

Technical Field

[0001] The invention relates to the technical field of deep foundation pit construction, in particular to a water level control device for sandy soil excavation in a deep foundation pit. Background Art

[0002] Deep foundation pits specifically refer to dewatering, support, and earthwork excavation projects with an excavation depth of 5m or more. The geological conditions of this type of engineering are complex, with regional, temporal, and spatial effects. The deformation and stability of the foundation pit support are closely related to the depth of the foundation pit. Sandy soil is a special type of soil with good permeability and a loose structure. If frozen soil or quicksand geology is encountered during excavation, it is prone to necking and landslides during construction due to mud scouring and the action of the trenching machine grab. During construction, the dewatering requirements for the foundation pit are high. If the water level cannot be lowered below the excavation surface, the foundation pit excavation may be placed in a dangerous state. Therefore, most of the well dewatering methods are used to control the excavation water level of sandy soil in deep foundation pits.

[0003] In the process of using the tube well point dewatering method, geotextile is wrapped around the side wall of the tube well to prevent sand and other particles from entering the interior of the tube well. However, due to the fine sand and fine-grained soil in the sandy soil gathering toward the tube well along the gaps in the coarse-grained soil under the action of dynamic water pressure, a certain amount of fine particles enters the geotextile at the bottom of the tube well, causing blockage of the geotextile surface and reducing the dewatering effect of the tube well.

[0004] Therefore, it is necessary to provide a new water level control device for deep foundation pit sandy soil excavation to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a water level control device for excavating sandy soil in a deep foundation pit, which can effectively prevent the surface of a geotextile from being blocked and improve the precipitation effect.

[0006] In order to solve the above technical problems, the water level control device for deep foundation pit sandy soil excavation provided by the present invention includes: a foundation pit; a main body, a plurality of the main bodies are respectively arranged on both sides of the foundation pit; a filtering mechanism, the filtering mechanism includes a support column, a first gear, a second gear, a tooth plate, a support ring, a support rod, a geotextile layer, a support net and a base, the bottom end of the main body is rotatably connected to the support ring, the tooth plates distributed in an annular manner are equidistantly installed inside the support ring, the first gear respectively meshes with the tooth plate and the second gear, the inside of the main body is fixedly connected to the support column, and the bottom end of the support column is rotatably connected to the first gear; the side walls of the base and the support ring are respectively equidistantly fixedly connected to the support rod and the support net, the side walls of the support rod are installed with the support net, and the side walls of the support net are covered with the geotextile layer; a compression mechanism, The compression mechanism is installed inside the main body and is connected to the second gear; the connecting mechanism connects the main body and the compression mechanism; the suction mechanism includes a connecting pipe, a fixed plate, a suction pipe, a rubber sleeve and a rubber strip, the side wall of the geotextile layer is slidingly connected to the fixed plate and the rubber strip, and the rubber strip is installed inside the fixed plate with an arc-shaped side wall; the side wall of the fixed plate is fixedly connected to the suction pipe, the suction pipe is connected to the connecting pipe, and a plurality of connecting pipes with a funnel-shaped end are equidistantly and obliquely installed on the side wall of the fixed plate; the storage mechanism is rotatably connected to the base, and the storage mechanism connects the suction pipe and the connecting mechanism; the adjustment mechanism is fixed inside the storage mechanism, and the adjustment mechanism is connected to the suction pipe.

[0007] Preferably, the main body includes a drainage pipe, a water pump, a pipe well, a gravel layer and a fine sand layer. The pipe wells are respectively arranged on both sides of the foundation pit, and the side walls of the pipe wells are paved with the gravel layer and the fine sand layer; the drainage pipe is installed inside the pipe well, and the drainage pipe is installed on the side wall of the water pump.

[0008] Preferably, the compression mechanism includes a fixed box, a waterproof variable frequency motor, a screw, a limiting ring, a fixed sleeve and a compression plate. The interior of the pipe well is fixedly connected to the fixed box, and the waterproof variable frequency motor is installed inside the fixed box; the screw is installed at one end of the waterproof variable frequency motor, and the screw is threadedly connected to the fixed sleeve, and the fixed sleeve is fixedly connected to the compression plate, and the compression plate is slidably connected to the drain pipe and the pipe well; the limiting ring is symmetrically installed on the side wall of the screw, and the limiting ring contacts the fixed sleeve.

[0009] Preferably, the bottom end of the pipe well is rotatably connected to the support ring, and the bottom end of the support ring is fixedly connected to the support column.

[0010] Preferably, the storage mechanism includes a fixed cylinder, a filter element, a fixed tube, a partition, a sealing ring and a groove. The fixed cylinder is rotatably connected to the base, the interior of the fixed cylinder is fixedly connected to the partition, and the partition, the fixed cylinder and the rubber sleeve are slidably connected; the interior of the partition is fixedly connected to the fixed tube, the fixed tube is rotatably connected to the partition, and the bottom end of the fixed tube is fixedly connected to the filter element; the groove is installed inside the base, and the sealing ring is installed inside the groove.

[0011] Preferably, the connecting mechanism includes a fixed rod, a first solenoid valve, a connecting pipe, a mounting pipe, a second solenoid valve, a third solenoid valve and a liquid level sensor; the bottom end of the drain pipe is fixedly connected to the fixed rod and the mounting pipe; the third solenoid valve is mounted on the side wall of the fixed rod; and the second solenoid valve is mounted on the side wall of the mounting pipe; the connecting pipe and the liquid level sensor are mounted on the side wall of the compression plate, and the first solenoid valve is mounted on the side wall of the connecting pipe.

[0012] Preferably, the fixing rod and the base are rotatably connected, the groove communicates with the fixing rod and the fixing tube, and the sealing ring contacts the side walls of the fixing rod and the fixing tube.

[0013] Preferably, the fixing cylinder and the geotextile layer are located inside the fine sand layer, and the geotextile layer and the fine sand layer are slidably connected.

[0014] Preferably, the adjustment mechanism includes a pull rod, a fixed ring, a roller, a rotating rod, a slot and a slide; the top surface of the partition is provided with an annular slot, the interior of the slot is slidingly connected to the fixed ring and the roller, and the roller is symmetrically installed on the bottom end of the fixed ring; the side wall of the fixed ring is fixedly connected to multiple rotating rods, and the rotating rod is fixedly connected to the fixed tube; the interior of the fixed ring is provided with an annular slot, the interior of the slot is slidingly connected to the pull rod with a spherical end, and the pull rod is fixedly connected to the straw, and the bottom end of the straw is tilted and located inside the fixed tube.

[0015] Preferably, the height of the slot gradually increases from one end of the fixing ring toward the other end of the fixing ring, and one end of the pull rod is engaged with the slot.

[0016] Compared with related technologies, the water level control device for deep foundation pit sandy soil excavation provided by the present invention has the following beneficial effects:

[0017] The present invention provides a water level control device for excavating sandy soil in a deep foundation pit. The side walls of the pipe well are paved with the crushed stone layer and the fine sand layer. The fine sand gathered in the pipe well first contacts with the crushed stone layer and the fine sand layer, so as to cut off the quicksand channel, reduce the fine sand on the surface of the geotextile layer, and extend the service life of the geotextile layer. When the surface of the geotextile layer is blocked, the compression mechanism drives the second gear to rotate, the second gear drives the first gear, the tooth plate and the support ring to rotate, the support ring drives the support rod, the support net and the geotextile layer to rotate, and at the same time, the compression mechanism rotates the The water inside the pipe well is compressed downward, causing the water inside the pipe well and the support net to penetrate the geotextile layer and overflow outward, washing away part of the fine sand adsorbed on the surface of the geotextile layer, but another part of the fine sand is still stuck inside the geotextile layer, and the water overflowing from the geotextile layer pushes the fine sand around the geotextile layer to move away from the geotextile layer, so that a layer of water exists between the geotextile layer and the fine sand layer, thereby reducing the resistance of the geotextile layer to rotate in the fine sand layer. At the same time, the water pump is connected to the suction pipe, so that suction is generated inside the suction pipe, the connecting pipe and the fixed plate. When the geotextile layer rotates, the geotextile layer slides over the side wall of the fixed plate with an arc-shaped side wall, and the fixed plate scrapes off the fine sand remaining on the surface of the geotextile layer. The rubber strip inside the fixed plate increases the sealing between the fixed plate and the geotextile layer, and improves the suction of the fixed plate to the water inside the support net. The water quickly recoils the geotextile layer into the interior of the fixed plate, thereby bringing the fine sand remaining and accumulated inside the geotextile layer into the interior of the fixed plate, further cleaning the geotextile layer, and effectively reducing the fine sand inside the geotextile. As the geotextile layer rotates, The fixed plate sucks out the fine sand remaining deep in the geotextile layer; when the compression mechanism does not compress the water inside the support net, the fine sand that is first flushed out of the geotextile layer is adsorbed again inside the geotextile layer. Since the fine sand has just attached to the inside of the geotextile layer, the adsorption force between the fine sand and the geotextile layer is small. As the geotextile layer rotates and enters the inside of the fixed plate, the inside of the fixed plate continuously absorbs the fine sand inside the geotextile layer and the water inside the support net, thereby cleaning the geotextile layer again, making it easier for the water around the foundation pit to penetrate the geotextile layer and enter the inside of the pipe well. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a water level control device for sandy soil excavation in a deep foundation pit provided by the present invention;

[0019] Figure 2 for Figure 1 An enlarged schematic diagram of the structure at point A is shown;

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point B is shown;

[0021] Figure 4 for Figure 2 An enlarged schematic diagram of the structure at position C is shown;

[0022] Figure 5 for Figure 2 An enlarged schematic diagram of the structure at D is shown;

[0023] Figure 6 for Figure 2 An enlarged schematic diagram of the structure at E is shown;

[0024] Figure 7 for Figure 3 A top view of the internal structure of the support ring is shown;

[0025] Figure 8 for Figure 3 A top view of the internal structure of the support net shown;

[0026] Figure 9 for Figure 8 The enlarged schematic diagram of the structure at F is shown;

[0027] Figure 10 for Figure 3 Schematic diagram of the internal structure of the fixing ring shown;

[0028] Figure 11 This is a schematic diagram of the circuit structure provided by the present invention.

[0029] Numbers in the figure: 1. foundation pit, 2. main body, 21. drainage pipe, 22. water pump, 23. pipe well, 24. gravel layer, 25. fine sand layer, 3. compression mechanism, 31. fixed box, 32. waterproof frequency conversion motor, 33. screw, 34. limiting ring, 35. fixed sleeve, 36. compression plate, 4. storage mechanism, 41. fixed cylinder, 42. filter element, 43. fixed pipe, 44. partition, 45. sealing ring, 46. groove, 5. filtering mechanism, 51. support column, 52. first gear, 53. second gear, 54. tooth plate, 55. support ring, 56. support rod, 57. geotextile layer, 58. support net, 59. base, 6. suction mechanism, 61. connecting pipe, 62. fixed plate, 63. suction pipe, 64. rubber sleeve, 65. rubber strip, 7. adjustment mechanism, 71. pull rod, 72. Fixed ring, 73. Roller, 74. Rotating rod, 75. Slot, 76. Slide, 8. Connecting mechanism, 81. Fixed rod, 82. First solenoid valve, 83. Connecting pipe, 84. Mounting pipe, 85. Second solenoid valve, 86. Third solenoid valve, 87. Liquid level sensor. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 ,in, Figure 1 A schematic structural diagram of a water level control device for sandy soil excavation in a deep foundation pit provided by the present invention; Figure 2 for Figure 1 An enlarged schematic diagram of the structure at point A is shown; Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point B is shown; Figure 4 for Figure 2 An enlarged schematic diagram of the structure at position C is shown; Figure 5 for Figure 2 An enlarged schematic diagram of the structure at D is shown; Figure 6 for Figure 2 An enlarged schematic diagram of the structure at E is shown; Figure 7 for Figure 3 A top view of the internal structure of the support ring is shown; Figure 8 for Figure 3 Figure 9 is a top view of the internal structure of the support net; Figure 8 The enlarged schematic diagram of the structure at F is shown; Figure 10 for Figure 3 Schematic diagram of the internal structure of the fixing ring shown; Figure 11This is a schematic diagram of the circuit structure provided by the present invention. The water level control device for excavating sandy soil in a deep foundation pit includes: a foundation pit 1; a main body 2, wherein a plurality of main bodies 2 are respectively arranged on both sides of the foundation pit 1; a filtering mechanism 5, wherein the filtering mechanism 5 includes a support column 51, a first gear 52, a second gear 53, a tooth plate 54, a support ring 55, a support rod 56, a geotextile layer 57, a support net 58 and a base 59, wherein the bottom end of the main body 2 is rotatably connected to the support ring 55, and the tooth plates 54 distributed in an annular manner are equidistantly installed inside the support ring 55, the first gear 52 respectively meshes with the tooth plate 54 and the second gear 53, the inside of the main body 2 is fixedly connected to the support column 51, and the bottom end of the support column 51 is rotatably connected to the first gear 52; the side walls of the base 59 and the support ring 55 are respectively equidistantly fixedly connected to the support rod 56 and the support net 58, the side wall of the support rod 56 is installed with the support net 58, and the side wall of the support net 58 is covered with the geotextile layer 57; a compression mechanism 3, wherein the compression mechanism 3 is installed inside the main body 2, and the compression mechanism 3 is connected to the second gear 53; a connecting mechanism 8, the connecting mechanism 8 connects the main body 2 and the compression mechanism 3; a suction mechanism 6, the suction mechanism 6 includes a connecting pipe 61, a fixing plate 62, a suction pipe 63, a rubber sleeve 64 and a rubber strip 65, the side wall of the geotextile layer 57 is slidably connected to the fixing plate 62 and the rubber strip 65, and the rubber strip 65 is installed inside the fixing plate 62 with an arc-shaped side wall; the side wall of the fixing plate 62 is fixedly connected to the suction pipe 63, the suction pipe 63 is connected to the connecting pipe 61, and a plurality of connecting pipes 61 with a funnel-shaped end are equidistantly and obliquely installed on the side wall of the fixing plate 62; a storage mechanism 4, the storage mechanism 4 is rotatably connected to the base 59, and the storage mechanism 4 is connected to the suction pipe 63 and the connecting mechanism 8; an adjustment mechanism 7, the adjustment mechanism 7 is fixed inside the storage mechanism 4, and the adjustment mechanism 7 is connected to the suction pipe 63.

[0032] The main body 2 includes a drainage pipe 21, a water pump 22, a pipe well 23, a gravel layer 24 and a fine sand layer 25. The pipe wells 23 are respectively arranged on both sides of the foundation pit 1, and the side walls of the pipe wells 23 are paved with the gravel layer 24 and the fine sand layer 25; the drainage pipe 21 is installed inside the pipe well 23, and the drainage pipe 21 is installed on the side wall of the water pump 22. In order to facilitate the operation of the water pump 22, the drainage pipe 21 sucks out the water inside the pipe well 23.

[0033] The compression mechanism 3 includes a fixed box 31, a waterproof variable frequency motor 32, a screw 33, a limiting ring 34, a fixing sleeve 35 and a compression plate 36. The interior of the pipe well 23 is fixedly connected to the fixed box 31, and the waterproof variable frequency motor 32 is installed inside the fixed box 31; one end of the waterproof variable frequency motor 32 is installed with the screw 33, the screw 33 and the fixing sleeve 35 are threadedly connected, and the fixing sleeve 35 is fixedly connected to the compression plate 36, and the compression plate 36 is slidably connected to the drain pipe 21 and the pipe well 23; the limiting ring 34 is symmetrically installed on the side wall of the screw 33, and the limiting ring 34 contacts the fixing sleeve 35. In order to facilitate the operation of the waterproof variable frequency motor 32 in the fixed box 31, the screw 33 is rotated, and the screw 33 and the fixing sleeve 35 are threadedly connected. The principle of screw transmission is used to push the fixing sleeve 35 and the compression plate 36 to move up and down inside the pipe well 23.

[0034] The bottom end of the pipe well 23 is rotatably connected to the support ring 55, and the bottom end of the support ring 55 is fixedly connected to the support column 51. In order to facilitate the screw 33 to drive the second gear 53 to rotate, the second gear 53 drives the first gear 52 to rotate at the bottom end of the support column 51.

[0035] The storage mechanism 4 includes a fixed cylinder 41, a filter element 42, a fixed tube 43, a partition 44, a sealing ring 45 and a groove 46. The fixed cylinder 41 is rotatably connected to the base 59. The interior of the fixed cylinder 41 is fixedly connected to the partition 44. The partition 44, the fixed cylinder 41 and the rubber sleeve 64 are slidably connected. The interior of the partition 44 is fixedly connected to the fixed tube 43. The fixed tube 43 is The base 59 is rotatably connected to the partition 44, and the bottom end of the fixed pipe 43 is fixedly connected to the filter element 42; the groove 46 is installed inside the base 59, and the sealing ring 45 is installed inside the groove 46. The connecting mechanism 8 includes a fixed rod 81, a first solenoid valve 82, a connecting pipe 83, a mounting pipe 84, a second solenoid valve 85, a third solenoid valve 86 and a liquid level sensor 87. The bottom end of the drain pipe 21 is fixedly connected to the fixed rod 81 and the mounting pipe 84. The side wall of the fixed rod 81 is installed with the third solenoid valve 86, and the side wall of the mounting pipe 84 is installed with the second solenoid valve 85; the compression plate 36 The connecting pipe 83 and the liquid level sensor 87 are installed on the side wall of the connecting pipe 83, and the first electromagnetic valve 82 is installed on the side wall of the connecting pipe 83; the fixing rod 81 is rotatably connected to the base 59, and the groove 46 connects the fixing rod 81 and the fixing pipe 43, and the sealing ring 45 contacts the fixing rod 81 and the side wall of the fixing pipe 43; in order to clean the geotextile layer 57, the second electromagnetic valve 85 is closed and the third electromagnetic valve 86 is opened to connect the drainage pipe 21 with the fixing rod 81, and the sealing ring 45 increases the distance between the fixing pipe 43 and the fixing rod 81. The sealing between them is achieved, thereby generating suction inside the groove 46, the fixed tube 43, the filter element 42 and the suction pipe 63, and the water and fine sand from the inside of the suction pipe 63 continuously enter the interior of the fixed cylinder 41, and the water inside the fixed cylinder 41 passes through the filter element 42 and remains inside the fixed cylinder 41, and the fine sand remains inside the fixed cylinder 41, and the base 59 drives the fixed tube 43 and the filter element 42 to rotate, and the filter element 42 rotates inside the fixed cylinder 41, so that the filter element 42 can absorb the accumulated water inside the fixed cylinder 41 and throw out the fine sand adsorbed on the surface of the filter element 42.

[0036] The fixing cylinder 41 and the geotextile layer 57 are located inside the fine sand layer 25 , and the geotextile layer 57 is slidably connected to the fine sand layer 25 , so that water inside the soil layer can pass through the fine sand layer 25 and contact the geotextile layer 57 .

[0037] The adjusting mechanism 7 includes a pull rod 71, a fixing ring 72, a roller 73, a rotating rod 74, a slot 75 and a slide 76. The top surface of the partition 44 is provided with an annular slide 76, the interior of the slide 76 is slidingly connected to the fixing ring 72 and the roller 73, and the bottom end of the fixing ring 72 is symmetrically mounted with the roller 73; the side wall of the fixing ring 72 is fixedly connected to a plurality of the rotating rods 74, and the rotating rods 74 are fixedly connected to the fixing tube 43; the interior of the fixing ring 72 is provided with an annular slot 75, the interior of the slot 75 is slidingly connected to the pull rod 71 with one end being spherical, and the pull rod 71 is fixedly connected to the straw 63, and the bottom end of the straw 63 is tilted and located inside the fixing cylinder 41; and one end of the pull rod 71 is fixed to the slot 75 When the locking cam 75 is in the unlocking state, the locking cam 75 is in the unlocking state, and the locking cam 75 is in the unlocking state, so that the locking cam 75 is locked.

[0038] The working principle of the water level control device for sandy soil excavation in a deep foundation pit provided by the present invention is as follows: during the excavation of the foundation pit 1, the water in the soil layer surrounding the foundation pit 1 comes into contact with the gravel layer 24 and the fine sand layer 25, and the water penetrates the geotextile layer 57 and enters the interior of the pipe well 23. The device is connected to an external power supply, and the liquid level sensor 87 at the bottom end of the compression plate 36 monitors the water level inside the pipe well 23 and transmits the information to the industrial computer. The industrial computer operates and processes the information to open the water pump 22 and the second solenoid valve 85, so that the water inside the pipe well 23 is discharged through the installation pipe 84 and the drainage pipe 21. During the precipitation process, the fine sand accumulated in the pipe well 23 first contacts the gravel layer 24 and the fine sand layer 25. Contact, so that it cuts off the quicksand channel and prolongs the service life of the geotextile layer 57; when the surface of the geotextile layer 57 is blocked, and at this time the water inside the pipe well 22 contacts the bottom surface of the compression plate 36, the industrial computer runs to open the waterproof frequency conversion motor 32 and the third solenoid valve 86, and closes the second solenoid valve 85. The waterproof frequency conversion motor 32 operates inside the fixed box 31 to rotate the screw 33. The screw 33 is threadedly connected to the fixed sleeve 35, and the principle of spiral transmission is used to push the fixed sleeve 35 and the compression plate 36 downward inside the pipe well 23; the screw 33 drives the second gear 53 to rotate , so that the second gear 53 drives the first gear 52 to rotate at the bottom end of the support column 51, the first gear 52 drives the tooth plate 54 and the support ring 55 to rotate, and the support ring 55 drives the support rod 56, the support net 58 and the geotextile layer 57 to rotate. At the same time, the compression plate 36 compresses the water inside the pipe well 23 downward, so that the water inside the pipe well 23 and the support net 58 penetrates the geotextile layer 57 and overflows outward, washing away some of the fine sand adsorbed on the surface of the geotextile layer 57, but another part of the fine sand is still stuck inside the geotextile layer 57, and the water overflowing from the geotextile layer 57 pushes the fine sand around the geotextile layer 57 to move away from the geotextile layer 57, so that a layer of water exists between the geotextile layer 57 and the fine sand layer 25, thereby reducing the resistance of the geotextile layer 57 to rotation in the fine sand layer 25;When the third solenoid valve 86 is opened, the drain pipe 21 is connected to the fixed rod 81, and the sealing ring 45 improves the sealing between the fixed pipe 43 and the fixed rod 81, thereby generating suction inside the groove 46, the fixed pipe 43, the filter element 42 and the suction pipe 63. The suction pipe 63 generates suction inside the connecting pipe 61 and the fixed plate 62. When the geotextile layer 57 rotates, the geotextile layer 57 slides over the side wall of the fixed plate 62 with an arc-shaped side wall. The fixed plate 62 scrapes off the fine sand remaining on the surface of the geotextile layer 57. The rubber strip 65 inside the fixed plate 62 increases the sealing between the fixed plate 62 and the geotextile layer 57, thereby improving the suction force of the fixed plate 62 on the water inside the support net 58. At this time, the support net 58 The water inside is compressed, causing the water to quickly backwash the geotextile layer 57 into the interior of the fixed plate 62, thereby causing the water to bring the fine sand accumulated inside the geotextile layer 57 into the interior of the fixed plate 62, further cleaning the geotextile layer 57 and effectively reducing the fine sand inside the geotextile 57. As the geotextile layer 57 rotates, the fixed plate 62 sucks out the fine sand remaining deep in the geotextile layer 57. The water and fine sand entering the interior of the fixed plate 62 continuously enter the interior of the fixed cylinder 41 through the suction pipe 63. The water inside the fixed cylinder 41 passes through the filter element 42 and remains in the interior of the fixed cylinder 41. The accumulated water inside the fixed cylinder 41 is sucked out by the water pump 22, leaving the fine sand inside the fixed cylinder 41. The base 59 drives the fixed pipe 43 and the filter element 42 to rotate. The filter element 42 rotates inside the fixed cylinder 41, making it easier for the filter element 42 to absorb the water from the fixed cylinder 41. The accumulated water inside the filter element 42 is removed, and the fine sand adsorbed on the surface of the filter element 42 is thrown out. The fixed tube 43 rotates to rotate the rotating rod 74 and the fixed ring 72, and the fixed ring 72 drives the roller 73 to rotate inside the chute 76;The fixing ring 72 drives the annular slot 75 to rotate, and the height of the slot 75 gradually increases along one end of the fixing ring 72 toward the other end of the fixing ring 72. The spherical end of the pull rod 71 is stuck inside the slot 75. As the slot 75 rotates, the slot 75 drives the pull rod 71 and the suction pipe 63 to move up and down continuously, and the pull rod 71 drives the fixed plate 62 to move up and down on the surface of the geotextile layer 57, changing the height of the connecting pipe 61, so that the connecting pipe 61 can evenly absorb the fine sand on the surface of the geotextile layer 57. During the descent of the compression plate 36, the displacement sensor below the compression plate 36 records the distance the compression plate 36 moves and transmits the information to the industrial computer. When the fixing sleeve 35 contacts the limit ring 34, the industrial computer operates to reverse the waterproof variable frequency motor 32 and the screw 33, and at the same time opens the first solenoid valve 83 and the connecting pipe 82. When the compression plate 36 moves upward, it does not absorb the water inside the support net 58. An appropriate amount of water is added to the inside of the pipe well 23, and the water enters the support net 58 through the connecting pipe 82. The water inside the support net 58 is replenished. At this time, the fine sand that was first flushed out of the geotextile layer 57 is again adsorbed into the geotextile layer 57 under the pressure of the fine sand layer 25. Because the fine sand has just adhered to the inside of the geotextile layer 57, the adsorption force between the fine sand and the geotextile layer 57 is relatively small. As the geotextile layer 57 rotates and enters the interior of the fixed plate 62, the fixed plate 62 continuously adsorbs the fine sand inside the geotextile layer 57 and the water inside the support net 58, thereby cleaning the geotextile layer 57 again. When the fixed sleeve 35 contacts the fixed sleeve 35 at the top of the screw 33, the industrial computer operates to rotate the waterproof variable frequency motor 32 clockwise, causing the compression plate 36 to move downward while penetrating the first solenoid valve 82, causing the above process to repeat. After the compression plate 36 reciprocates up and down once, the geotextile layer 57 is cleaned three times. During the first cleaning, water from the support net 58 backwashes the geotextile layer 57, removing particles adsorbed on its surface and reducing the resistance to rotation. During the second cleaning, the fixed plate 62 draws water from the geotextile layer 57, while the compressed water from the support net 58 backwashes the geotextile layer 57, doubly removing any remaining particles. During the third cleaning, the fixed plate 62 draws particles that are re-adsorbed on the surface of the geotextile layer 57. These three cleanings effectively remove particles from both inside and outside the geotextile layer 57, preventing clogging. This allows water in the soil to penetrate the geotextile layer 57 and enter the interior of the manhole 23.

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A water level control device for deep foundation pit sandy soil excavation, characterized in that: include: foundation pit (1); A main body (2), wherein a plurality of the main bodies (2) are respectively arranged on both sides of the foundation pit (1); the main body (2) comprises a drainage pipe (21), a water pump (22), a pipe well (23), a gravel layer (24) and a fine sand layer (25); the pipe wells (23) are respectively arranged on both sides of the foundation pit (1), and the side walls of the pipe wells (23) are paved with the gravel layer (24) and the fine sand layer (25); the drainage pipe (21) is installed inside the pipe wells (23), and the drainage pipe (21) is installed on the side wall of the water pump (22); A filtering mechanism (5), the filtering mechanism (5) comprising a support column (51), a first gear (52), a second gear (53), a tooth plate (54), a support ring (55), a support rod (56), a geotextile layer (57), a support net (58) and a base (59), the bottom end of the main body (2) being rotatably connected to the support ring (55), the tooth plates (54) being equidistantly installed in an annular distribution inside the support ring (55), the first gear (52) being respectively engaged with the tooth plates (54) and the second gear (53), the inside of the main body (2) being fixedly connected to the support column (51), the bottom end of the support column (51) being rotatably connected to the first gear (52); the side walls of the base (59) and the support ring (55) being respectively equidistantly fixedly connected to the support rod (56) and the support net (58), the side wall of the support rod (56) being installed with the support net (58), and the side wall of the support net (58) being sleeved with the geotextile layer (57); A compression mechanism (3), the compression mechanism (3) is installed inside the main body (2), and the compression mechanism (3) is connected to the second gear (53); the compression mechanism (3) includes a fixed box (31), a waterproof variable frequency motor (32), a screw (33), a limiting ring (34), a fixed sleeve (35) and a compression plate (36); the interior of the pipe well (23) is fixedly connected to the fixed box (31), and the waterproof variable frequency motor (32) is installed inside the fixed box (31); one end of the waterproof variable frequency motor (32) is installed with the screw (33), the screw (33) and the fixing sleeve (35) are threadedly connected, and the fixing sleeve (35) and the compression plate (36) are fixedly connected, and the compression plate (36) and the drain pipe (21) and the pipe well (23) are slidably connected; the limiting ring (34) is symmetrically installed on the side wall of the screw (33), and the limiting ring (34) contacts the fixing sleeve (35); A connecting mechanism (8), wherein the connecting mechanism (8) connects the main body (2) and the compression mechanism (3); the connecting mechanism (8) comprises a fixing rod (81), a first electromagnetic valve (82), a connecting pipe (83), a mounting pipe (84), a second electromagnetic valve (85), a third electromagnetic valve (86) and a liquid level sensor (87); the bottom end of the drain pipe (21) is fixedly connected to the fixing rod (81) and the mounting pipe (84); the third electromagnetic valve (86) is mounted on the side wall of the fixing rod (81); and the second electromagnetic valve (85) is mounted on the side wall of the mounting pipe (84); the connecting pipe (83) and the liquid level sensor (87) are mounted on the side wall of the compression plate (36), and the first electromagnetic valve (82) is mounted on the side wall of the connecting pipe (83); A suction mechanism (6), the suction mechanism (6) comprising a connecting pipe (61), a fixing plate (62), a suction pipe (63), a rubber sleeve (64) and a rubber strip (65), the side wall of the geotextile layer (57) being slidably connected to the fixing plate (62) and the rubber strip (65), and the rubber strip (65) being installed inside the fixing plate (62) having an arc-shaped side wall; the side wall of the fixing plate (62) being fixedly connected to the suction pipe (63), the suction pipe (63) being connected to the connecting pipe (61), and a plurality of connecting pipes (61) having a funnel-shaped end are equidistantly and obliquely installed on the side wall of the fixing plate (62); A storage mechanism (4), wherein the storage mechanism (4) is rotatably connected to the base (59), and the storage mechanism (4) is connected to the straw (63) and the connecting mechanism (8); An adjusting mechanism (7), wherein the adjusting mechanism (7) is fixed inside the storage mechanism (4), and the adjusting mechanism (7) is connected to the straw (63).

2. The water level control device for deep foundation pit sandy soil excavation according to claim 1, characterized in that: The bottom end of the pipe well (23) is rotatably connected to the support ring (55), and the bottom end of the support ring (55) is fixedly connected to the support column (51).

3. The water level control device for deep foundation pit sandy soil excavation according to claim 1, characterized in that: The storage mechanism (4) comprises a fixed cylinder (41), a filter element (42), a fixed tube (43), a partition (44), a sealing ring (45) and a groove (46); the fixed cylinder (41) is rotatably connected to the base (59); the interior of the fixed cylinder (41) is fixedly connected to the partition (44); the partition (44), the fixed cylinder (41) and the rubber sleeve (64) are slidably connected; the interior of the partition (44) is fixedly connected to the fixed tube (43); the fixed tube (43) and the partition (44) are rotatably connected, and the bottom end of the fixed tube (43) is fixedly connected to the filter element (42); the interior of the base (59) is provided with the groove (46), and the sealing ring (45) is installed inside the groove (46).

4. The water level control device for deep foundation pit sandy soil excavation according to claim 3, characterized in that: The fixing rod (81) is rotatably connected to the base (59), the groove (46) communicates with the fixing rod (81) and the fixing tube (43), and the sealing ring (45) contacts the side walls of the fixing rod (81) and the fixing tube (43).

5. The water level control device for deep foundation pit sandy soil excavation according to claim 3, characterized in that: The fixing cylinder (41) and the geotextile layer (57) are located inside the fine sand layer (25), and the geotextile layer (57) and the fine sand layer (25) are slidably connected.

6. The water level control device for deep foundation pit sandy soil excavation according to claim 3, characterized in that: The adjusting mechanism (7) includes a pull rod (71), a fixed ring (72), a roller (73), a rotating rod (74), a slot (75) and a slide (76). The top surface of the partition (44) is provided with an annular slide (76). The interior of the slide (76) is slidably connected to the fixed ring (72) and the roller (73). The roller (73) is symmetrically installed at the bottom end of the fixed ring (72). The side wall of the fixed ring (72) is fixedly connected to multiple rotating rods (74), and the rotating rods (74) are fixedly connected to the fixed tube (43). The interior of the fixed ring (72) is provided with an annular slot (75). The interior of the slot (75) is slidably connected to the pull rod (71) with one end being spherical. The pull rod (71) is fixedly connected to the straw (63). The bottom end of the straw (63) is tilted and located inside the fixed cylinder (41).

7. The water level control device for deep foundation pit sandy soil excavation according to claim 6, characterized in that: The height of the clamping groove (75) gradually increases along the direction from one end of the fixing ring (72) toward the other end of the fixing ring (72), and one end of the pull rod (71) is engaged with the clamping groove (75).

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