Foundation pit dewatering structure for foundation pit excavation

Abstract

The foundation pit dewatering structure comprises a foundation pit, a drainage channel is dug in the bottom of the foundation pit, and a water collecting well which communicates with the drainage channel and is used for allowing accumulated water in the foundation pit to flow in is further dug in the bottom of the foundation pit; a drainage mechanism is arranged at the water collecting well; the drainage mechanism comprises a drainage support, a conical filter screen and a driving assembly, wherein the conical filter screen is rotationally installed on the top of the drainage support and covers an opening in the upper end of the water collecting well, and the driving assembly is installed on the drainage support and drives the conical filter screen to rotate. The drainage pump is installed at the bottom of the drainage support, and the drainage pipeline is connected to the water outlet end of the drainage pump. And a central pipe fitting which is used for allowing the drainage pipeline to pass through and supporting the drainage pipeline in a circumferential rotating manner is arranged in the center of the top of the conical filter screen. The construction method has the advantage that the probability that accumulated water cannot be discharged from the foundation pit due to the fact that the filter screen is blocked by silt is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of foundation pits, and particularly relates to a foundation pit dewatering structure for foundation pit excavation. BACKGROUND

[0002] During excavation of a foundation pit, water seepage and water gushing often occur, thereby forming accumulated water in the foundation pit, affecting the construction of the foundation pit, and even causing the foundation pit to collapse in severe cases, thereby affecting the safety of workers, so that a foundation pit dewatering structure is needed to drain the accumulated water. The foundation pit dewatering structure generally comprises a catch basin connected to the foundation pit, a water pump installed at the bottom of the catch basin, a drainage pipe connected to the water pump, and a filter screen arranged at the top of the catch basin. The accumulated water in the foundation pit usually contains silt. When the accumulated water flows through the filter screen, the filter screen can block the silt and allow the water to flow into the catch basin, and then the water is pumped out of the catch basin by the water pump along the drainage pipe.

[0003] According to the related technology in the above, the inventors believe that in the use process of the above foundation pit dewatering structure, the silt is easy to block the filter screen, so that the accumulated water cannot flow into the catch basin, thereby causing the accumulated water in the foundation pit to be unable to be drained. CONTENT OF THE UTILITY MODEL

[0004] In order to reduce the probability that the accumulated water cannot be drained from the foundation pit due to the filter screen being blocked by silt, the application provides a foundation pit dewatering structure for foundation pit excavation.

[0005] The foundation pit dewatering structure for foundation pit excavation provided by the application adopts the following technical scheme:

[0006] A foundation pit dewatering structure for foundation pit excavation, comprising a foundation pit, a drainage channel is dug at the bottom of the foundation pit, and a catch basin for allowing accumulated water in the foundation pit to flow in is also dug at the bottom of the foundation pit and is connected to the drainage channel; a drainage mechanism is arranged at the catch basin; the drainage mechanism comprises a drainage support, a conical filter screen rotatably installed at the top of the drainage support and covering the upper end opening of the catch basin, a driving assembly installed on the drainage support and driving the conical filter screen to rotate, a drainage pump installed at the bottom of the drainage support, and a drainage pipeline connected to the water outlet end of the drainage pump; a central pipe for passing the drainage pipeline and circumferentially rotating to support the drainage pipeline is arranged at the top center of the conical filter screen.

[0007] By adopting the technical scheme, when the accumulated water in the foundation pit flows into the upper surface of the conical filter screen through the drainage channel, the driving assembly drives the conical filter screen to rotate, so that the silt in the accumulated water is thrown around the well mouth of the water collecting well by the conical filter screen and the water can pass through the conical filter screen and flow to the bottom of the water collecting well, and the water at the bottom of the water collecting well is discharged outside the water collecting well through the drainage pipeline by the drainage pump, thereby the probability that the filter screen is blocked by silt and the accumulated water cannot be discharged from the foundation pit can be reduced.

[0008] Optionally, the top of the drainage support has a mounting seat for arranging the conical filter screen, the mounting seat has a silt blocking baffle arranged circumferentially outside the opening of the water collecting well, and the silt blocking baffle is provided with a water inlet through hole opposite to the drainage channel and used for the accumulated water to pass through.

[0009] By adopting the technical scheme, the silt blocking baffle is arranged to throw the silt to the inside of the silt blocking baffle when the conical filter screen rotates, which helps the operator to clean the silt. The water inlet through hole is arranged to guide the accumulated water to flow to the conical filter screen through the water inlet through hole, thereby helping to discharge the accumulated water in the foundation pit.

[0010] Optionally, the mounting seat has a mounting pipe arranged in the water collecting well, the top of the mounting pipe is provided with a first annular groove circumferentially and a driving bearing is arranged in the first annular groove, and the conical filter screen has a clamping ring part matched with the driving bearing.

[0011] By adopting the technical scheme, the first annular groove and the driving bearing are arranged, so that when the conical filter screen is arranged in the mounting seat, the clamping ring part of the conical filter screen can be clamped and matched with the driving bearing, which helps to make the conical filter screen have ideal rotation stability when rotating.

[0012] Optionally, the driving assembly comprises a first gear mounted on the conical filter screen and arranged coaxially with the conical filter screen, a second gear meshed with the first gear, and a driving motor driving the second gear to rotate, and the first gear has a central through hole for the drainage pipeline to pass through.

[0013] By adopting the technical scheme, the specific structure of the driving assembly is disclosed. The cooperation of the first gear, the second gear and the driving motor makes the conical filter screen rotate and throw the silt in the accumulated water out of the accumulated water when filtering the accumulated water.

[0014] Optionally, the bottom of the first gear is provided with a stabilizing pipe for the drainage pipeline to pass through, the drainage support has a stabilizing sleeve outside the stabilizing pipe, and a supporting bearing is arranged between the stabilizing pipe and the stabilizing sleeve.

[0015] By adopting the technical scheme, the cooperation of the stabilizing pipe and the stabilizing sleeve makes the stability of the first gear in the rotating process more ideal, thereby making the stability of the conical filter screen in the rotating process more ideal.

[0016] Optionally, the filter through hole of the conical filter screen is a conical through hole, and a diameter of the conical through hole gradually decreases along a direction from an outer surface to an inner surface of the conical filter screen.

[0017] By adopting the technical scheme, when the silt is blocked in the conical through hole, since the diameter of the conical through hole gradually decreases along the direction from the outer surface to the inner surface of the filter screen and the conical filter screen can generate the centrifugal force in the rotating process, the silt can be thrown to the outside of the conical through hole, thereby further reducing the probability of the conical filter screen being blocked.

[0018] Optionally, an outer side wall of the drain pipeline is provided with a limiting convex ring abutting against the top end of the central pipe.

[0019] By adopting the technical scheme, the limiting convex ring can support the central pipe of the conical filter screen to support the drain pipeline, thereby reducing the pressure of the drain pipeline on the drain pump and helping the drain pump to stably operate.

[0020] Optionally, a water blocking support is mounted at a bottom of the drain support, and the water blocking support has a water blocking plate located at an upper side of the drain pump, and the water blocking plate has a through hole for the drain pipeline to penetrate.

[0021] By adopting the technical scheme, the water blocking support and the water blocking plate can reduce the impact of the water flow on the drain pump, so that the drain pump can operate more stably, and the drain pump can stably pump out the water. The water blocking plate having the through hole for the drain pipeline to penetrate can reduce the probability of the drain pipeline interfering with the water blocking plate when penetrating the water blocking plate.

[0022] Optionally, the water blocking plate is a hollow conical structure, and an outer diameter of the water blocking plate gradually increases from top to bottom.

[0023] By adopting the technical scheme, the water flow can be better guided to flow down along the upper surface of the water blocking plate, and the water can be better guided to the outer edge of the drain pump.

[0024] Optionally, a cleaning assembly for cleaning the conical filter screen is mounted on the mud blocking apron, and the cleaning assembly includes a cleaning brush for abutting against an outer surface of the conical filter screen and a driving oil cylinder for driving the cleaning brush to move.

[0025] By adopting the technical scheme, the cleaning assembly is arranged so that the driving oil cylinder can abut the cleaning brush against the outer surface of the conical filter screen, and the conical filter screen is rotated to clean the silt on the surface of the conical filter screen, thereby further reducing the probability of the conical filter screen being blocked.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. A foundation pit dewatering structure for foundation pit excavation, by arranging a drainage mechanism in the water collecting well, when the accumulated water in the foundation pit flows to the conical filter screen, the driving assembly drives the conical filter screen to rotate so that the silt in the accumulated water is filtered and the water can flow to the bottom of the water collecting well, and under the action of the drainage pump and the drainage pipeline, the water is discharged outside the water collecting well; thereby reducing the probability that the filter screen is blocked by silt and causes the accumulated water to be unable to be discharged from the foundation pit;

[0028] 2. By arranging the silt blocking coaming outside the opening of the water collecting well, the conical filter screen can throw the silt to the inner side of the silt blocking coaming, thereby helping the operator to clean the silt; by opening the water inlet opening in the silt blocking coaming, the water can flow to the outer surface of the conical filter screen through the water inlet opening, thereby helping to discharge the accumulated water in the foundation pit;

[0029] 3. By installing the driving assembly on the drainage support, the cooperation of the first gear, the second gear and the driving motor enables the conical filter screen to rotate when filtering the accumulated water, thereby throwing out the silt in the accumulated water. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a cross-sectional view of the foundation pit dewatering structure for foundation pit excavation in the embodiment of the present application.

[0031] Figure 2 is a cross-sectional view of the drainage mechanism in the embodiment of the present application.

[0032] Figure 3 is a top view of the drainage mechanism in the embodiment of the present application.

[0033] Figure 4 is Figure 2 a partial enlarged view of position A in FIG.

[0034] Figure 5 is a structural view of the conical through hole in the embodiment of the present application.

[0035] Figure 6 is Figure 2 a partial enlarged view of position B in FIG.

[0036] Explanation of reference signs: 1, foundation pit; 2, drainage ditch; 21, first drainage ditch; 22, second drainage ditch; 3, water collecting well; 31, arrangement ring groove; 4, drainage mechanism; 41, drainage support; 411, mounting base; 412, mounting seat; 4121, mounting bottom plate; 4122, mud blocking coaming; 4123, mounting pipe; 4124, water inlet opening; 4125, water inlet baffle; 4126, first ring groove; 413, support column; 414, first support; 4141, stabilizing sleeve; 42, drainage pump; 43, drainage pipeline; 431, limiting convex ring; 44, conical filter screen; 441, clamping ring part; 442, conical through hole; 443, central pipe fitting; 444, inner support support; 4441, inner support ring; 4442, inner support rod; 451, driving motor; 452, second gear; 453, first gear; 4531, central through hole; 4532, stabilizing tube; 46, water blocking support; 47, water blocking plate; 5, cleaning assembly; 51, driving oil cylinder; 52, cleaning brush. DETAILED DESCRIPTION

[0037] The following will be described in detail below with reference to the accompanying drawings. Figures 1-6 The present application is further described in detail.

[0038] The embodiment of the present application discloses a foundation pit dewatering structure for foundation pit excavation.

[0039] Reference is made to Figure 1 A foundation pit dewatering structure for foundation pit excavation comprises a foundation pit 1, a drainage ditch 2 arranged at the bottom of the foundation pit 1, a water collecting well 3 dug at the bottom of the foundation pit 1 and communicated with the drainage ditch 2, and a drainage mechanism 4 mounted in the water collecting well 3. In the embodiment, the water collecting well 3 is a cylindrical well.

[0040] Reference is made to Figure 1 The drainage ditch 2 comprises first drainage ditches 21 arranged at the bottom of the foundation pit 1 and spaced along the length direction, and a second drainage ditch 22 communicated with the end of all the first drainage ditches 21 and located at the side edge of the foundation pit 1. The end of the second drainage ditch 22 is communicated with the water collecting well 3. Wherein, the bottom surface of the first drainage ditch 21 is inclined downward along the end close to the second drainage ditch 22, and the bottom surface of the second drainage ditch 22 is inclined downward along the end close to the water collecting well 3, so that the accumulated water in the foundation pit 1 flows into the water collecting well 3 after converging through the first drainage ditch 21 and the second drainage ditch 22. Wherein, the bottom surface of the foundation pit 1 is provided with the arrangement ring groove 31 along the outer edge of the water collecting well 3.

[0041] Reference is made to Figure 1 and Figure 2A drainage mechanism 4 is installed in the water collecting well 3. The drainage mechanism 4 comprises a drainage support 41 installed in the water collecting well 3, a drainage pump 42 installed at the bottom of the drainage support 41, a drainage pipeline 43 connected to the water outlet end of the drainage pump 42 and located outside the water collecting well 3, a conical filter screen 44 installed at the top of the drainage support 41 and used to cover the upper end opening of the water collecting well 3, and a driving assembly installed in the drainage support 41 and used to drive the conical filter screen 44 to rotate.

[0042] With reference to Figure 2 The drainage support 41 comprises a mounting base 411 at the bottom, a mounting seat 412 at the top and used to arrange the conical filter screen 44, and a plurality of support columns 413 connecting the mounting base 411 and the mounting seat 412. In the embodiment, the number of the support columns 413 is four and they are arranged uniformly and circumferentially.

[0043] With reference to Figure 1 , Figure 2 and Figure 3 The mounting seat 412 comprises a mounting bottom plate 4121 installed in the arranging ring groove 31, a mud blocking baffle 4122 vertically connected to the mounting bottom plate 4121 and arranged circumferentially away from the opening side of the water collecting well 3, and a mounting pipe 4123 arranged in the opening of the water collecting well 3. The mounting bottom plate 4121 is a circular ring plate, the mud blocking baffle 4122 is provided with a water inlet passage 4124 on the side facing the second drainage ditch 22, and two opposite water inlet baffles 4125 are arranged on both sides of the opening of the water inlet passage 4124. The water inlet baffles 4125 are attached to the inner side wall of the second drainage ditch 22. The mounting bottom plate 4121 is connected to the upper region of the mounting pipe 4123, so that the top end of the mounting pipe 4123 extends to the upper side of the mounting bottom plate 4121.

[0044] With reference to Figure 4 The mounting pipe 4123 is further provided with a first ring groove 4126 at the top and circumferentially, and a driving bearing is arranged in the first ring groove 4126. In order to make the rotation stability of the conical filter screen 44 ideal when it is installed in the mounting seat 412, the bottom of the conical filter screen 44 is further provided with a clamping ring part 441 circumferentially for cooperating with the driving bearing. When the conical filter screen 44 is installed in the mounting seat 412, the clamping ring part 441 of the conical filter screen 44 is clamped with the inner side of the driving bearing, so that the conical filter screen 44 can rotate at the driving bearing.

[0045] With reference to Figure 2 , Figure 5 and Figure 6The outer diameter of the conical filter screen 44 gradually increases from top to bottom. The filter holes of the conical filter screen 44 are conical holes 442, and the hole diameter of the conical holes 442 gradually decreases along the direction from the outer surface to the inner surface of the conical filter screen 44. A central pipe 443 for passing and circumferentially rotatingly supporting the drain pipe 43 is arranged at the top center of the conical filter screen 44. The inner side of the conical filter screen 44 is further provided with an inner support bracket 444. The inner support bracket 444 includes an inner support ring 4441 and an inner support rod 4442 which is obliquely arranged and connected between the inner support ring 4441 and the conical filter screen 44. In the embodiment, the number of the inner support rod 4442 is four and is circumferentially uniformly arranged.

[0046] With reference to Figure 6 The driving assembly includes a driving motor 451, a second gear 452 mounted on the output shaft of the driving motor 451, and a first gear 453 mounted on the bottom surface of the inner support ring 4441 and engaged with the second gear 452. The modulus of the first gear 453 is greater than that of the second gear 452. The first gear 453 is further provided with a central through hole 4531 for passing the drain pipe 43. The drain support is provided with a first support 414 for mounting the driving motor 451.

[0047] With reference to Figure 6 In order to make the stability of the first gear 453 ideal when rotating, the bottom of the first gear 453 is further coaxially provided with a stabilizing pipe 4532, and the first support 414 is provided with a stabilizing sleeve 4141 for inserting the stabilizing pipe 4532. The stabilizing sleeve 4141 and the stabilizing pipe 4532 are further provided with a support bearing therebetween, the inner side of the stabilizing sleeve 4141 is clamped with the outer side of the support bearing, and the outer side of the stabilizing pipe 4532 is clamped with the inner side of the support bearing, so that the driving motor 451 can drive the first gear 453 to rotate synchronously with the stabilizing pipe 4532.

[0048] With reference to Figure 2 and Figure 3 The drain pump 42 is mounted on the mounting base 411 by screws. In order to make the mounting stability of the drain pipe 43 on the central pipe 443 ideal and to reduce the pressure of the drain pipe 43 on the drain pump 42, the outer side wall of the drain pipe 43 is provided with a limiting convex ring 431 abutting against the top end of the central pipe 443.

[0049] With reference to Figure 2 In order to reduce the impact of the water entering from the conical filter screen 44 on the drain pump 42, a water blocking support 46 is mounted on the mounting base 411 and outside the drain pump 42, and a water blocking plate 47 is further mounted on the top of the water blocking support 46. The water blocking plate 47 is a hollow conical structure, the outer diameter of the water blocking plate 47 gradually increases from top to bottom, and the top center of the water blocking plate 47 is further provided with a through hole for passing the drain pipe 43.

[0050] With reference to Figure 2 and Figure 3 , in order to reduce the probability of the conical filter screen 44 being clogged by the silt in continuous operation, the mud baffle 4122 is further provided with a cleaning assembly 5 at the vertical position of the water inlet 4124, the cleaning assembly 5 comprising a driving oil cylinder 51 mounted on the mud baffle 4122 and a cleaning brush 52 connected to the driving oil cylinder 51. The mud baffle 4122 further has an arrangement through hole for the driving oil cylinder 51 to be arranged. When the conical filter screen 44 rotates, the driving oil cylinder 51 can drive the cleaning brush 52 to abut against the outer surface of the conical filter screen 44, so that the silt on the surface of the conical filter screen 44 can be cleaned.

[0051] In combination Figures 1 to 6 , the implementation principle of the foundation pit 1 dewatering structure for foundation pit excavation according to an embodiment of the present application is as follows: by placing the drainage mechanism 4 in the water collecting well 3, when the accumulated water flows from the drainage channel 2 through the water inlet 4124 to the surface of the conical filter screen 44, the driving assembly drives the conical filter screen 44 to rotate, so that the silt in the accumulated water is thrown to the inner side of the mud baffle 4122, and then the water flows through the conical through hole 442 of the conical filter screen 44 to the bottom of the water collecting well 3, and the water is discharged by the water pump 42 through the drainage pipeline 43 to the outside of the water collecting well 3.

[0052] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A foundation dewatering structure for foundation excavation, comprising a foundation (1), a drain channel (2) being excavated at the bottom of the foundation (1), and a water collecting well (3) being excavated at the bottom of the foundation (1) and communicating with the drain channel (2) and being used for the inflow of accumulated water in the foundation (1); characterized in that, The water collecting well (3) is provided with a drainage mechanism (4); the drainage mechanism (4) comprises a drainage support (41), a conical filter screen (44) rotatably arranged on the top of the drainage support (41) and covering the upper end opening of the water collecting well (3), a driving assembly installed on the drainage support (41) and driving the conical filter screen (44) to rotate, a drainage pump (42) installed on the bottom of the drainage support (41) and a drainage pipeline (43) connected to the water outlet end of the drainage pump (42); the top center of the conical filter screen (44) is provided with a center pipe (443) for passing through the drainage pipeline (43) and circumferentially rotating to support the drainage pipeline (43).

2. The foundation dewatering structure for foundation excavation according to claim 1, characterized in that, The top of the drainage support (41) is provided with a mounting seat (412) for arranging the conical filter screen (44), the mounting seat (412) is provided with a mud blocking baffle (4122) circumferentially arranged outside the opening of the water collecting well (3), and the mud blocking baffle (4122) is provided with a water inlet through hole (4124) opposite to the drainage channel (2) and for passing through the accumulated water.

3. The foundation dewatering structure for foundation excavation according to claim 2, characterized in that, The mounting seat (412) is provided with a mounting pipe (4123) arranged in the water collecting well (3), the top of the mounting pipe (4123) is circumferentially provided with a first annular groove (4126), and a driving bearing is arranged in the first annular groove (4126); the conical filter screen (44) is provided with a clamping ring portion (441) matched with the driving bearing.

4. The foundation dewatering structure for foundation excavation according to claim 3, characterized in that, The driving assembly comprises a first gear (453) installed on the conical filter screen (44) and coaxially arranged with the conical filter screen (44), a second gear (452) engaged with the first gear (453) and a driving motor (451) driving the second gear (452) to rotate; the first gear (453) is provided with a center through hole (4531) for passing through the drainage pipeline (43).

5. The foundation dewatering structure for foundation excavation according to claim 4, wherein, The bottom of the first gear (453) is provided with a stabilizing pipe (4532) for passing through the drainage pipeline (43); the drainage support (41) is provided with a stabilizing sleeve (4141) outside the stabilizing pipe (4532), and a supporting bearing is arranged between the stabilizing pipe (4532) and the stabilizing sleeve (4141).

6. The foundation dewatering structure for foundation excavation according to claim 1, wherein The filter through hole of the conical filter screen (44) is a conical through hole (442), and the hole diameter of the conical through hole (442) gradually decreases from the outer surface to the inner surface of the conical filter screen (44).

7. The foundation dewatering structure for foundation excavation according to claim 1, characterized in that, The outer side wall of the drainage pipeline (43) is provided with a limiting convex ring (431) abutting against the top end of the center pipe (443).

8. The foundation dewatering structure for foundation excavation according to claim 1, characterized in that, The bottom of the drainage support (41) is provided with a water blocking support (46), and the water blocking support (46) is provided with a water blocking plate (47) above the drainage pump (42), and the water blocking plate (47) is provided with a through hole for penetrating the drainage pipeline (43).

9. The foundation dewatering structure for foundation excavation according to claim 8, wherein, The water blocking plate (47) is a hollow conical structure, and the outer diameter of the water blocking plate (47) gradually increases from top to bottom.

10. The foundation dewatering structure for foundation excavation according to claim 2, characterized in that, The mud baffle (4122) is provided with a cleaning assembly (5) for cleaning the conical filter screen (44); the cleaning assembly (5) comprises a cleaning brush (52) for abutting the outer surface of the conical filter screen (44) and a driving oil cylinder (51) for driving the cleaning brush (52) to move.

Images