Anti-seepage treatment equipment and treatment method for deep foundation pit excavation in water-rich silty sand stratum

Abstract

The present invention relates to the field of anti-seepage treatment for deep foundation pit excavation, and in particular to an anti-seepage treatment device for deep foundation pit excavation in a water-rich silt sand stratum and a treatment method thereof, comprising a workbench, a stirring mechanism and a grouting mechanism. The top of the workbench is provided with a stirring mechanism, and the stirring mechanism is provided with a grouting mechanism. The present invention provides an anti-seepage treatment device for deep foundation pit excavation in a water-rich silt sand stratum. In the process of injecting anti-seepage slurry into the seepage point in the foundation pit, the grouting mechanism is provided to avoid the problem of reducing grouting work efficiency caused by traditional single-slurry or double-slurry injection. In the process of injecting anti-seepage slurry into the seepage point in the foundation pit, the dredging component is provided to timely dredge the grouting pipe to prevent the clogging of the grouting pipe and thus affecting the grouting effect of the slurry.

Description

Technical Field

[0001] The invention relates to the field of anti-seepage treatment for deep foundation pit excavation, and in particular to anti-seepage treatment equipment for deep foundation pit excavation in water-rich silt sand strata and a treatment method thereof. Background Art

[0002] The key to risk control in foundation pit projects is water management, especially for deep foundation pits. Once water seepage occurs in the foundation pit, water and sand gushing channels will be formed, which will be accompanied by a large amount of water and soil loss outside the pit. If it is not sealed in time, serious consequences will occur. Especially when excavating deep foundation pits in water-rich silt sand strata, water and sand gushing accidents are more likely to occur, which will have a greater impact on surrounding buildings, pipelines, and roads. If water and sand gushing hazards occur in the foundation pit and cannot be effectively controlled in a short time, once water and sand gushing channels are formed, it will inevitably cause ground collapse. Therefore, water seepage problems during foundation pit excavation must be prevented and controlled during construction. When dealing with water seepage problems in foundation pits, grouting devices are generally used to directly inject anti-seepage slurry into the seepage area.

[0003] The following problems still exist in the process of injecting anti-seepage slurry into the seepage area in the foundation pit:

[0004] 1. In the process of injecting anti-seepage slurry into the seepage area in the foundation pit, the traditional method is to use a device for single slurry or double slurry injection. If the seepage area is large, there will be no time for grouting, which will affect the construction and greatly reduce the work efficiency of grouting.

[0005] 2. In the process of injecting anti-seepage slurry into the seepage area in the foundation pit, the traditional grouting device generally does not have a dredging piece, which easily causes the injected slurry to remain in the grouting pipe, causing blockage and affecting the grouting effect of the slurry. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, the present invention provides a leakage prevention treatment device for deep foundation pit excavation in water-rich silt sand strata and a treatment method thereof.

[0007] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions: a leakage prevention treatment device for deep foundation pit excavation in water-rich silt sand strata, comprising a workbench, a stirring mechanism and a grouting mechanism, wherein the stirring mechanism is provided on the top of the workbench, and the grouting mechanism is provided on the stirring mechanism;

[0008] The stirring mechanism includes an electric push rod, a fixed plate, a buffer spring, a stirring drum, a circular cover, a stirring shaft, a stirring assembly and a conical plug. The fixed plate is fixedly installed at the top center position of the workbench through the electric push rod, and the workbench and the fixed plate are fixedly connected near the four corners by buffer springs. The stirring drum is fixedly installed on the top of the fixed plate through a support rod, and a circular cover is fixedly installed on the top of the stirring drum. A driving motor is fixedly installed at the top center position of the circular cover, and the output shaft of the driving motor passes through the circular cover and is fixedly installed with the stirring shaft. A stirring assembly is provided on the stirring shaft, a conical feed port is provided near the left side of the top of the circular cover, and a conical plug is provided on the conical feed port. A pressure pump is installed near the right side of the top of the circular cover, and the bottom of the inner side wall of the stirring drum is inclined downward from left to right, and a circular through hole is provided near the bottom of the right end side wall of the stirring drum.

[0009] As a preferred technical solution of the present invention, the grouting mechanism includes a connecting pipe, an L-shaped telescopic pipe, a grouting pipe, an adjusting component, a rectangular plate, a stabilizing plate, an adjusting rod, a dredging component and a moving component. The side wall of the mixing drum is fixedly installed with a connecting pipe with a T-shaped structure at the position of the circular through hole. A plurality of interconnected L-shaped telescopic pipes are evenly installed at the bottom of the vertical section of the connecting pipe from front to back. A connected grouting pipe is installed on the right side of the horizontal section of the L-shaped telescopic pipe. An adjusting component is provided on the right side of the fixed plate. A rectangular plate is fixedly installed on the right side wall of the mixing drum through an extending plate. A rectangular groove is provided on the right end face of the rectangular plate. A plurality of stabilizing plates are slidingly provided in the rectangular groove. Adjusting rods corresponding to the grouting pipes are provided on the plurality of stabilizing plates near the right side. The adjusting rod is in a threaded structure near the top and is threadedly connected to the stabilizing plate. A detachable dredging component is provided at the bottom of the adjusting rod, and a moving component is provided on the rectangular plate.

[0010] As a preferred technical solution of the present invention, the stirring assembly includes a connecting plate, a stirring rod, a vertical scraper and a stirring belt. The stirring shaft is fixedly installed with connecting plates evenly distributed along the circumference. Multiple connecting plates are evenly distributed from top to bottom along the stirring shaft and are staggered between adjacent connecting plates. Multiple stirring rods are provided on the connecting plates. A vertical scraper is fixedly installed on the end of the connecting plate away from the stirring shaft. A stirring belt with a spiral structure is also provided on the stirring shaft.

[0011] As a preferred technical solution of the present invention, the adjustment component includes a square plate, a swinging plate and an electric telescopic rod. A movable groove is provided on the right end face of the fixed plate, and multiple square plates are slidably arranged in the movable groove. The right end face of the square plate is fixedly connected to the side wall of the grouting pipe. The top of the square plate is hinged with a swinging plate through a pin shaft. Every two swinging plates are located at the intersection between every two square plates and are hinged through a pin shaft. A fixed groove is provided at the center position of the right end face of the fixed plate, and an electric telescopic rod is fixedly installed in the fixed groove. The movable end of the electric telescopic rod is fixedly connected to the hinge at the middle swinging plate.

[0012] As a preferred technical solution of the present invention, the dredging assembly includes a fixed rod, a scraper plate and an arc-shaped dredging rod. A detachable fixed rod is provided at the bottom of the adjusting rod. The scraper plate is fixedly installed evenly along the circumference near the upper position of the side wall of the fixed rod. The side wall of the scraper plate is located in the grouting pipe and contacts the inner wall of the grouting pipe. The arc-shaped dredging rods evenly distributed along the circumference are fixedly installed below the scraper plate on the fixed rod. The arc-shaped dredging rods are evenly distributed along the fixed rod from top to bottom.

[0013] As an optimal technical solution of the present invention, the described moving assembly includes an extension plate, a return spring, a moving plate, a first sprocket, a No. 2 sprocket, a limit rod and a chain, and the extension plate is fixedly installed at the top center position of the rectangular plate, and a displacement groove is opened on the top of the extension plate, and the moving plate is slidably arranged in the displacement groove by a return spring. The forward and reverse motor is fixedly installed on the moving plate, and the output shaft of the forward and reverse motor is fixedly installed with the No. 1 sprocket. A limiting groove is circumferentially provided on the adjusting rod near the upper position and the second sprocket is provided on the adjusting rod and above the fixing plate. The limiting block is slidably arranged in the limiting groove, and the bottom of the No. 2 sprocket is provided with an annular groove, and the limiting rods are symmetrically fixed on the fixing plate and on the adjusting rod, and the limiting rods are slidably arranged in the annular groove, and multiple No. 2 sprockets and the No. 1 sprocket are connected by chain transmission.

[0014] As a preferred technical solution of the present invention, universal wheels are fixedly installed on the bottom of the workbench near the four corners, and a push handle is hinged on the left end face of the workbench through a pin.

[0015] As a preferred technical solution of the present invention, scale lines evenly arranged from front to back are provided near the upper portion of the right end surface of the fixing plate.

[0016] The present invention also provides a method for preventing leakage during excavation of a deep foundation pit in a water-rich silt sand stratum, which specifically comprises the following steps:

[0017] S1. Mobile equipment: First, move the equipment to the location of the grouting hole that needs grouting in the deep foundation pit;

[0018] S2. Adjusting equipment: After completing step S1, the distance of the grouting pipe is adjusted according to the different spacings of the grouting holes that need to be grouted in the deep foundation pit, and then the electric push rod is started so that the fixed plate drives the grouting pipe to be located in the grouting hole;

[0019] S3. Placing slurry: After step S2 is completed, the prepared chemical slurry and cement slurry are placed in the mixing drum according to the proportion and are evenly mixed by the provided stirring assembly;

[0020] S4. Start grouting: After completing step S3, start the pressure pump and inject the slurry into the grouting hole. During the grouting process, the slurry in the grouting pipe can be dredged by the provided dredging component.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The present invention provides an anti-seepage treatment device for deep foundation pit excavation in water-rich silt sand strata. In the process of injecting anti-seepage slurry into the seepage area in the foundation pit, the grouting mechanism is set up to avoid the problem of reducing grouting work efficiency caused by traditional single-slurry or double-slurry injection.

[0023] 2. In the process of injecting anti-seepage slurry into the seepage area in the foundation pit, the dredging component provided in the present invention can timely dredge the grouting pipe to prevent the clogging of the grouting pipe and thus affect the grouting effect of the slurry.

[0024] 3. The present invention can increase the mixing effect of the slurry by providing a stirring belt. Through the vertical scraper, while the connecting plate drives the stirring rod to evenly mix the slurry in the mixing drum, the vertical scraper can scrape off the slurry on the inner wall of the mixing drum to prevent the slurry from adhering to the inner wall of the mixing drum and affecting the mixing ratio of the slurry, thereby improving the quality of the slurry.

[0025] 4. While clearing the slurry in the grouting pipe, the present invention can scrape the slurry on the inner wall of the grouting pipe through the provided scraping plate, so as to prevent the slurry from adhering to the inner wall of the grouting pipe and not falling off easily to cause residue, which will affect the grouting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] Figure 1 It is a first three-dimensional structural schematic diagram of the present invention.

[0028] Figure 2 It is a second three-dimensional structural schematic diagram of the present invention.

[0029] Figure 3 This invention Figure 2A local enlarged view in the M direction.

[0030] Figure 4 It is a partial cross-sectional view of the present invention.

[0031] Figure 5 This invention Figure 4 N-axis local enlarged view.

[0032] Figure 6 It is a schematic diagram of the main cross-sectional structure of the present invention.

[0033] Figure 7 This invention Figure 6 AA section view.

[0034] Figure 8 It is a schematic diagram of the connection structure of the dredging component of the present invention.

[0035] Figure 9 It is a workflow diagram of the present invention.

[0036] Figure: 1, workbench; 11, universal wheel; 12, push handle; 2, stirring mechanism; 21, electric push rod; 22, fixed plate; 221, scale line; 23, buffer spring; 24, stirring drum; 25, circular cover; 26, stirring shaft; 27, stirring assembly; 271, connecting plate; 272, stirring rod; 273, vertical scraper; 274, stirring belt; 28, tapered plug; 3, grouting mechanism; 31, connecting pipe; 32, L-shaped telescopic pipe; 33, Grouting pipe; 34. Adjustment assembly; 341. Square plate; 342. Swinging plate; 343. Electric telescopic rod; 35. Rectangular plate; 36. Stabilizing plate; 37. Adjustment rod; 38. Dredging assembly; 381. Fixed rod; 382. Scraper plate; 383. Arc-shaped dredging rod; 39. Moving assembly; 391. Extension plate; 392. Return spring; 393. Moving plate; 394. Sprocket No. 1; 395. Sprocket No. 2; 396. Limit rod; 397. Chain. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further elaborated.

[0038] See Figure 1 , a water-rich silt sand stratum deep foundation pit excavation anti-leakage treatment equipment, including a workbench 1, a stirring mechanism 2 and a grouting mechanism 3, the top of the workbench 1 is provided with a stirring mechanism 2, and the stirring mechanism 2 is provided with a grouting mechanism 3;

[0039] See Figure 1 、 Figure 2 and Figure 4The stirring mechanism 2 includes an electric push rod 21, a fixed plate 22, a buffer spring 23, a stirring drum 24, a circular cover 25, a stirring shaft 26, a stirring assembly 27 and a tapered plug 28. The top center position of the workbench 1 is fixedly installed with a fixed plate 22 through the electric push rod 21. The workbench 1 and the fixed plate 22 are fixedly connected near the four corners by buffer springs 23. The top of the fixed plate 22 is fixedly installed with a stirring drum 24 through a support rod. The top of the stirring drum 24 is fixedly installed with a circular cover 25. The circular A driving motor is fixedly installed at the center of the top of the cover plate 25. A stirring shaft 26 is fixedly installed after the output shaft of the driving motor passes through the circular cover plate 25. A stirring assembly 27 is provided on the stirring shaft 26. A conical feed port is opened near the left side of the top of the circular cover plate 25. A conical plug 28 is provided on the conical feed port. A pressure pump is installed near the right side of the top of the circular cover plate 25. The bottom of the inner side wall of the stirring drum 24 is inclined downward from left to right, and a circular through hole is opened near the bottom of the right end side wall of the stirring drum 24.

[0040] In the original state, the equipment is first moved to the position of the grouting holes that need to be grouted in the deep foundation pit. At this time, the grouting mechanism 3 is adjusted according to the different spacing of the grouting holes that need to be grouted in the deep foundation pit. After the adjustment, the electric push rod 21 is started. The electric push rod 21 causes the fixed plate 22 to drive the grouting mechanism 3 to move downward, so that the grouting mechanism 3 is located directly above the grouting hole. At this time, the prepared chemical slurry and cement slurry are put into the mixing drum 24 through the feed port in proportion for standby use. Next, the conical plug 28 is placed into the feed port, and finally the drive motor is started. The drive motor causes the stirring shaft 26 to drive the stirring component 27 to rotate, and the stirring component 27 is used to evenly mix the slurry in the mixing drum 24, so that the slurry is evenly mixed while avoiding slurry solidification.

[0041] See Figure 4 and Figure 6 The stirring assembly 27 includes a connecting plate 271, a stirring rod 272, a vertical scraper 273 and a stirring belt 274. The connecting plates 271 are evenly distributed along the circumference of the stirring shaft 26. A plurality of connecting plates 271 are evenly distributed from top to bottom along the stirring shaft 26, and the adjacent two connecting plates 271 are staggered. A plurality of stirring rods 272 are provided on each connecting plate 271. A vertical scraper 273 is fixedly installed at one end of the connecting plate 271 away from the stirring shaft 26. A stirring belt 274 with a spiral structure is also provided on the stirring shaft 26.

[0042] When the drive motor is started, the drive motor causes the stirring shaft 26 to drive the connecting plate 271 to rotate, and the connecting plate 271 drives the stirring rod 272 to evenly mix the slurry in the mixing drum 24. The stirring belt 274 is provided to increase the mixing effect of the slurry. The vertical scraper 273 provided on the connecting plate 271 can scrape off the slurry on the inner wall of the mixing drum 24 while the connecting plate 271 drives the stirring rod 272 to evenly mix the slurry in the mixing drum 24, thereby preventing the slurry from adhering to the inner wall of the mixing drum 24 and affecting the mixing ratio of the slurry, thereby improving the quality of the slurry.

[0043] See Figure 1 The bottom of the workbench 1 is fixedly mounted with universal wheels 11 near the four corners, and the left end surface of the workbench 1 is hinged with a push handle 12 through a pin;

[0044] The universal wheels 11 and the push handle 12 provided on the workbench 1 facilitate movement of the equipment;

[0045] See Figure 1 and Figure 2 The grouting mechanism 3 includes a connecting pipe 31, an L-shaped telescopic pipe 32, a grouting pipe 33, an adjusting assembly 34, a rectangular plate 35, a stabilizing plate 36, an adjusting rod 37, a dredging assembly 38 and a moving assembly 39. The side wall of the mixing drum 24 is fixedly installed with a connecting pipe 31 in a T-shaped structure at the position of the circular through hole. A plurality of interconnected L-shaped telescopic pipes 32 are evenly installed at the bottom of the vertical section of the connecting pipe 31 from front to back. A connected grouting pipe 33 is installed on the right side of the horizontal section of the L-shaped telescopic pipe 32. The right side of the fixed plate 22 An adjustment component 34 is provided on the side. A rectangular plate 35 is fixedly installed on the right side wall of the mixing drum 24 through an extended plate. A rectangular groove is provided on the right end surface of the rectangular plate 35. A plurality of stabilizing plates 36 are slidably provided in the rectangular groove. An adjustment rod 37 corresponding to the grouting pipe 33 is provided near the right side of the plurality of stabilizing plates 36. The adjustment rod 37 has a threaded structure near the top and is threadedly connected to the stabilizing plate 36. A detachable dredging component 38 is provided at the bottom of the adjustment rod 37. A moving component 39 is provided on the rectangular plate 35.

[0046] After the equipment is moved to the position of the grouting holes that need grouting in the deep foundation pit, the adjusting component 34 is adjusted according to the different spacings of the grouting holes that need grouting in the deep foundation pit. The adjusting component 34 drives the distance between the grouting pipes 33 to be adjusted, thereby enhancing the use range of the equipment. After the stirring component 27 evenly mixes the slurry in the stirring drum 24, the pressure pump is started, so that the mixed slurry in the stirring drum 24 flows into the L-shaped telescopic tube 32 through the connecting pipe 31 on the stirring drum 24, and finally the slurry is injected into the grouting holes that need grouting in the deep foundation pit through the grouting pipe 33. At the same time of grouting, the moving component 39 is started. The moving component 39 enables the adjusting rod 37 to drive the dredging component 38 to dredge the slurry in the grouting pipe 33 to avoid the slurry clogging the grouting pipe 33 and thus being detrimental to grouting.

[0047] See Figure 6 and Figure 7 The adjusting assembly 34 includes a square plate 341, a swinging plate 342 and an electric telescopic rod 343. The right end surface of the fixed plate 22 is provided with a movable groove, and a plurality of square plates 341 are slidably arranged in the movable groove. The right end surface of the square plate 341 is fixedly connected to the side wall of the grouting pipe 33. The top of the square plate 341 is hinged with a swinging plate 342 through a pin. Every two swinging plates 342 are hinged at the intersection between every two square plates 341 through a pin. A fixed groove is provided at the center position of the right end surface of the fixed plate 22, and an electric telescopic rod 343 is fixedly installed in the fixed groove. The movable end of the electric telescopic rod 343 is fixedly connected to the hinge of the middle swinging plate 342.

[0048] See Figure 2 , the right end surface of the fixing plate 22 is provided with scale lines 221 evenly arranged from front to back near the upper position;

[0049] When the distance of the grouting pipe 33 is adjusted according to the different spacings of the grouting holes that need to be grouted in the deep foundation pit, the specific adjustment method is: start the electric telescopic rod 343, the electric telescopic rod 343 causes the swing plate 342 to drive the square plate 341 to move in the moving groove, and then the square plate 341 drives the grouting pipe 33 to adjust the distance. By setting the scale line 221 on the fixed plate 22, the distance adjustment between the grouting pipes 33 is made more precise.

[0050] See Figure 2 、 Figure 3 、 Figure 4 and Figure 5The moving assembly 39 includes an extension plate 391, a return spring 392, a moving plate 393, a first sprocket 394, a second sprocket 395, a limit rod 396 and a chain 397. The extension plate 391 is fixedly installed at the top center of the rectangular plate 35. A displacement groove is provided on the top of the extension plate 391. A moving plate 393 is slidingly provided in the displacement groove through the return spring 392. A forward and reverse motor is fixedly installed on the moving plate 393. The output shaft of the forward and reverse motor is fixedly installed with a first sprocket 394. The adjusting rod 37 is near the top. A limit groove is provided at the position along the circumferential direction, and a second sprocket 395 is provided on the adjusting rod 37 and above the stabilizing plate 36. The inner side wall of the second sprocket 395 is evenly fixedly installed with limit blocks that match the limit groove along the circumferential direction. The limit blocks are slidably set in the limit groove. An annular groove is provided at the bottom of the second sprocket 395. A limit rod 396 is fixedly installed on the stabilizing plate 36 and symmetrically on the left and right sides of the adjusting rod 37. The limit rod 396 is slidably set in the annular groove. Multiple second sprockets 395 and the first sprocket 394 are connected to each other through a chain 397.

[0051] When the distance of the grouting pipe 33 is adjusted, the grouting pipe 33 causes the dredging component 38 to drive the adjusting rod 37 to adjust the distance, so that the adjusting rod 37 drives the stabilizing plate 36 to slide in the rectangular groove. When the distance of the adjusting rod 37 is moved, the adjusting rod 37 causes the chain 397 to drive the No. 1 sprocket 394 to move, and the No. 1 sprocket 394 causes the forward and reverse motor to drive the moving plate 393 to squeeze the reset spring 392 in the displacement groove, so that the chain 397 is always in a tensioned state, thereby making the adjusting rod 37 drives the dredging component 38 to always be located in the grouting pipe 33, and while grouting, the forward and reverse motors are started, and the forward and reverse motors drive the No. 1 sprocket 394 to rotate. At this time, under the action of the chain 397, multiple No. 2 sprockets 395 drive the adjusting rod 37 to rotate. At this time, under the action of the stabilizing plate 36, the adjusting rod 37 rotates and moves downward. The adjusting rod 37 drives the dredging component 38 to dredge the slurry in the grouting pipe 33 to prevent the slurry from clogging the grouting pipe 33 and thus hindering grouting.

[0052] See Figure 8 The dredging assembly 38 includes a fixed rod 381, a scraper plate 382 and an arc-shaped dredging rod 383. The bottom of the adjusting rod 37 is provided with a detachable fixed rod 381. The side wall of the fixed rod 381 is fixedly installed with a scraper plate 382 evenly along the circumference near the upper position. The side wall of the scraper plate 382 is located in the grouting pipe 33 and contacts the inner side wall of the grouting pipe 33. The fixed rod 381 is fixedly installed below the scraper plate 382 with arc-shaped dredging rods 383 evenly distributed along the circumference. The arc-shaped dredging rods 383 are evenly distributed from top to bottom along the fixed rod 381.

[0053] When the adjusting rod 37 rotates and moves downward under the action of the forward and reverse motors, the adjusting rod 37 causes the fixing rod 381 to drive the arc-shaped dredging rod 383 to dredge the slurry in the grouting pipe 33. The arc-shaped dredging rod 383 is set as an arc structure to prevent the slurry from remaining on the arc-shaped dredging rod 383. While dredging the slurry in the grouting pipe 33, the scraper plate 382 can also scrape the slurry on the inner wall of the grouting pipe 33 to prevent the slurry from sticking to the inner wall of the grouting pipe 33 and not easily falling off, causing residue, which in turn affects the grouting effect.

[0054] The present invention also provides a method for preventing leakage during excavation of a deep foundation pit in a water-rich silt sand stratum, which specifically comprises the following steps:

[0055] S1. Mobile equipment: First, move the equipment to the location of the grouting hole that needs grouting in the deep foundation pit.

[0056] S2. Adjustment equipment: After step S1 is completed, the adjustment component 34 is adjusted according to the different spacings of the grouting holes that need to be grouted in the deep foundation pit. The specific adjustment method is: start the electric telescopic rod 343, the electric telescopic rod 343 enables the swing plate 342 to drive the square plate 341 to move in the moving groove, and then enables the square plate 341 to drive the grouting pipe 33 to adjust the distance. After the adjustment, start the electric push rod 21, the electric push rod 21 enables the fixed plate 22 to drive the grouting mechanism 3 to move downward, so that the grouting mechanism 3 is located directly above the grouting hole.

[0057] S3. Place the slurry: After completing step S2, put the prepared chemical slurry and cement slurry into the mixing drum 24 in proportion for standby use. Next, put the conical plug 28 into the feed port, and finally start the drive motor. The drive motor causes the stirring shaft 26 to drive the connecting plate 271 to rotate, and the connecting plate 271 drives the stirring rod 272 to evenly mix the slurry in the mixing drum 24. The stirring belt 274 is provided to increase the mixing effect of the slurry. The vertical scraper 273 is provided on the connecting plate 271. While the connecting plate 271 drives the stirring rod 272 to evenly mix the slurry in the mixing drum 24, the vertical scraper 273 can scrape off the slurry on the inner wall of the mixing drum 24.

[0058] S4. Start grouting: After step S3 is completed, start the pressure pump, so that the slurry mixed in the mixing drum 24 flows into the L-shaped telescopic tube 32 through the connecting pipe 31 on the mixing drum 24, and finally injects the slurry into the grouting holes that need grouting in the deep foundation pit through the grouting pipe 33. While grouting, start the forward and reverse motors, and the forward and reverse motors drive the No. 1 sprocket 394 to rotate. At this time, under the action of the chain 397, the multiple No. 2 sprockets 395 drive the adjusting rod 37 to rotate. At this time, under the action of the stabilizing plate 36, the adjusting rod 37 rotates and moves downward. The adjusting rod 37 enables the fixing rod 381 to drive the arc-shaped dredging rod 383 to dredge the slurry in the grouting pipe 33.

[0059] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A leakage prevention treatment device for deep foundation pit excavation in water-rich silt sand strata, comprising a workbench (1), characterized in that: A stirring mechanism (2) is provided on the top of the workbench (1), and a grouting mechanism (3) is provided on the stirring mechanism (2); The stirring mechanism (2) includes an electric push rod (21), a fixed plate (22) is fixedly installed at the center position of the top of the workbench (1) through the electric push rod (21), the workbench (1) and the fixed plate (22) are fixedly connected near the four corners through buffer springs (23), a stirring drum (24) is fixedly installed on the top of the fixed plate (22) through a support rod, a circular cover plate (25) is fixedly installed on the top of the stirring drum (24), and a driving electric motor is fixedly installed at the center position of the top of the circular cover plate (25). The output shaft of the driving motor passes through the circular cover plate (25) and is fixedly mounted with a stirring shaft (26), a stirring assembly (27) is provided on the stirring shaft (26), a conical feed port is provided at a position near the left side of the top of the circular cover plate (25), a conical plug (28) is provided on the conical feed port, a pressure pump is installed at a position near the right side of the top of the circular cover plate (25), the bottom of the inner side wall of the stirring drum (24) is tilted downward from left to right, and a circular through hole is provided at a position near the bottom of the right end side wall of the stirring drum (24); The grouting mechanism (3) includes a connecting pipe (31), a connecting pipe (31) with a T-shaped structure is fixedly installed on the side wall of the mixing drum (24) at the position of the circular through hole, a plurality of connected L-shaped telescopic pipes (32) are evenly installed on the bottom of the vertical section of the connecting pipe (31) from front to back, a connected grouting pipe (33) is installed on the right side of the horizontal section of the L-shaped telescopic pipe (32), a rectangular plate (35) is fixedly installed on the right side wall of the mixing drum (24) through an extended plate, a rectangular groove is provided on the right end surface of the rectangular plate (35), a plurality of stabilizing plates (36) are slidably arranged in the rectangular groove, and an adjusting rod (37) corresponding to the grouting pipe (33) is provided on the plurality of stabilizing plates (36) near the right side, the adjusting rod (37) is in a threaded structure near the top and is connected to the stabilizing plate (36) by a thread, a detachable dredging component (38) is provided at the bottom of the adjusting rod (37), and a moving component (39) is provided on the rectangular plate (35); An adjustment assembly (34) is provided on the right side of the fixed plate (22); The adjustment component (34) includes a square plate (341), a movable groove is provided on the right end face of the fixed plate (22), and a plurality of square plates (341) are slidably arranged in the movable groove. The right end face of the square plate (341) is fixedly connected to the side wall of the grouting pipe (33), and the top of the square plate (341) is hinged with a swing plate (342) through a pin shaft. Every two swing plates (342) are located at the intersection between every two square plates (341) and are hinged to each other through a pin shaft. A fixed groove is provided at the center position of the right end face of the fixed plate (22), and an electric telescopic rod (343) is fixedly installed in the fixed groove. The movable end of the electric telescopic rod (343) is fixedly connected to the hinge of the middle swing plate (342).

2. The anti-seepage treatment equipment for deep foundation pit excavation in water-rich silt sand strata according to claim 1, characterized in that: The stirring assembly (27) includes a connecting plate (271), and the stirring shaft (26) is fixedly mounted with connecting plates (271) uniformly distributed along the circumference. The multiple connecting plates (271) are uniformly distributed from top to bottom along the stirring shaft (26), and are staggered between two adjacent connecting plates (271). The connecting plates (271) are each provided with multiple stirring rods (272). A vertical scraper (273) is fixedly mounted on one end of the connecting plate (271) away from the stirring shaft (26). The stirring shaft (26) is also provided with a stirring belt (274) with a spiral structure.

3. The anti-seepage treatment equipment for deep foundation pit excavation in water-rich silt sand strata according to claim 1, characterized in that: The dredging assembly (38) includes a fixed rod (381), a detachable fixed rod (381) is provided at the bottom of the adjusting rod (37), a scraper plate (382) is fixedly installed evenly along the circumference near the upper position of the side wall of the fixed rod (381), the side wall of the scraper plate (382) is located in the grouting pipe (33) and contacts the inner wall of the grouting pipe (33), and an arc-shaped dredging rod (383) evenly distributed along the circumference is fixedly installed below the scraper plate (382) on the fixed rod (381), and the arc-shaped dredging rod (383) is evenly distributed from top to bottom along the fixed rod (381).

4. The anti-seepage treatment equipment for deep foundation pit excavation in water-rich silt sand strata according to claim 1, characterized in that: The moving assembly (39) includes an extension plate (391), the extension plate (391) is fixedly installed at the top center position of the rectangular plate (35), a displacement groove is provided on the top of the extension plate (391), a moving plate (393) is slidably provided in the displacement groove through a return spring (392), a forward and reverse motor is fixedly installed on the moving plate (393), and a No. 1 sprocket (394) is fixedly installed on the output shaft of the forward and reverse motor. A limiting groove is provided in the circumferential direction near the top of the adjusting rod (37), and the adjusting rod (37) is located at A second sprocket (395) is provided above the stabilizing plate (36), and a limiting block matching the limiting groove is fixedly installed uniformly on the inner side wall of the second sprocket (395) along the circumferential direction. The limiting block is slidably arranged in the limiting groove. An annular groove is provided at the bottom of the second sprocket (395). A limiting rod (396) is fixedly installed on the stabilizing plate (36) and located on the left and right sides of the adjusting rod (37). The limiting rod (396) is slidably arranged in the annular groove. The plurality of second sprockets (395) and the first sprocket (394) are connected to each other through a chain (397).

5. The anti-seepage treatment equipment for deep foundation pit excavation in water-rich silt sand strata according to claim 1, characterized in that: Universal wheels (11) are fixedly installed at the bottom of the workbench (1) near the four corners, and a push handle (12) is hinged on the left end surface of the workbench (1) through a pin.

6. The anti-seepage treatment equipment for deep foundation pit excavation in water-rich silt sand strata according to claim 1, characterized in that: The right end surface of the fixing plate (22) is provided with scale lines (221) evenly arranged from front to back at a position close to the upper portion.

7. The anti-seepage treatment equipment for deep foundation pit excavation in water-rich silt sand strata according to claim 1, characterized in that: The above-mentioned anti-seepage treatment equipment for deep foundation pit excavation in water-rich silt sand strata is used for specific operations. The specific treatment method includes the following steps: S1. Mobile equipment: First, move the equipment to the location of the grouting hole that needs grouting in the deep foundation pit; S2, adjusting equipment: after step S1 is completed, the distance of the grouting pipe (33) is adjusted according to the different spacings of the grouting holes that need to be grouted in the deep foundation pit, and then the electric push rod (21) is started so that the fixed plate (22) drives the grouting pipe (33) to be located in the grouting hole; S3. Placing slurry: After step S2 is completed, the prepared chemical slurry and cement slurry are placed in a mixing drum (24) in proportion for standby use, and are uniformly mixed by a provided stirring assembly (27); S4, start grouting: After step S3 is completed, start the pressure pump to inject the slurry into the grouting hole. During the grouting process, the slurry in the grouting pipe (33) can be dredged by the provided dredging component (38).

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