Tunnel foundation pit dewatering well

Abstract

The utility model discloses a tunnel foundation pit dewatering well, which comprises a shaft, the well lid is fixedly mounted at the top of the shaft; the device further comprises a lifting type drainage mechanism arranged in the shaft, the lifting type drainage mechanism comprises an upper fixing ring, a lower fixing ring, an adsorption mechanism and guide rods, the upper fixing ring is connected to the upper edge of the shaft through a positioning assembly, the lower fixing ring is connected to the upper fixing ring through the guide rods, and the guide rods are evenly distributed between the upper fixing ring and the lower fixing ring. The adsorption mechanism is movably connected to the guide rod, a driving assembly and a drainage assembly are arranged on the well lid, and the driving assembly and the drainage assembly are connected to the adsorption mechanism. The height position of the adsorption mechanism can be adjusted according to the depth of the water level in the dewatering well, the drainage requirement is met, the drainage assembly is not prone to being blocked, and the service life of the lifting type drainage mechanism is prolonged.

Description

Technical Field

[0001] The utility model relates to a tunnel foundation pit dewatering well. Background Art

[0002] At present, in the process of construction, precipitation wells play the role of precipitation. Some are deep and some are shallow. The depth depends on the precipitation requirements. When constructing underground buildings, if the groundwater level is relatively high, it is necessary to set up precipitation wells on the surface. By draining the water in the deep wells, the water level in the stratum where the building is located can be lowered below the construction position, so that the precipitation work can proceed smoothly.

[0003] Well-point dewatering is a method of artificially lowering the groundwater level. It is also called the "well-point dewatering method". Before excavating the foundation pit, a certain number of foundation pit dewatering wells are set around the foundation pit, and water is pumped out using pumping equipment to keep the excavated soil dry. This method can drain the moisture in the base soil, promote soil consolidation, and improve foundation strength. At the same time, it can reduce the lateral displacement and settlement of the soil slope, stabilize the slope, eliminate quicksand, and reduce the uplift of the base soil, so that the foundation and foundation engineering construction located below the natural groundwater can avoid the influence of groundwater, provide relatively dry construction conditions, and can also reduce the amount of earthwork, shorten the construction period, improve the quality of the project and ensure construction safety.

[0004] Dewatering wells are used to lower the groundwater level in the tunnel excavation mountain during tunnel construction to facilitate normal tunnel excavation. When building a tunnel in a sand layer or other extremely soft rock, when the groundwater level is relatively high, it is necessary to set up dewatering wells on the surface to drain the water in the wells so that construction can proceed smoothly.

[0005] The drainage mechanism in the prior art is generally directly installed at the bottom of the precipitation well. Due to the large amount of impurities such as mud, sand and weeds, the drainage mechanism is easily blocked, affecting the drainage efficiency. Utility Model Content

[0006] The utility model aims to provide a technical solution for a tunnel foundation pit dewatering well in view of the deficiencies in the prior art, which can not only adjust the height position of the adsorption mechanism according to the depth of the water level in the dewatering well to meet the drainage requirements, but also is not prone to clogging of the drainage components, thereby extending the service life of the lifting drainage mechanism.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A tunnel foundation pit dewatering well, comprising:

[0009] a well shaft;

[0010] and a manhole cover, the manhole cover being fixedly mounted on the top of the wellbore;

[0011] Features:

[0012] It also includes a lifting drainage mechanism arranged in the wellbore, the lifting drainage mechanism includes an upper fixed ring, a lower fixed ring, an adsorption mechanism and a guide rod, the upper fixed ring is connected to the upper edge of the wellbore through a positioning assembly, the lower fixed ring is connected to the upper fixed ring through a guide rod, the guide rods are evenly distributed between the upper fixed ring and the lower fixed ring, the adsorption mechanism is movably connected to the guide rod, and a driving assembly and a drainage assembly are provided on the well cover, and the driving assembly and the drainage assembly are connected to the adsorption mechanism; through the design of the above structure, not only can the height position of the adsorption mechanism be adjusted according to the depth of the water level in the precipitation well to meet the drainage requirements, but it is also not easy to cause clogging of the drainage assembly, thereby extending the service life of the lifting drainage mechanism, the upper fixed ring, the lower fixed ring and the guide rod improve the stability and reliability of the up and down movement of the adsorption mechanism, and avoid tilting and affecting the drainage effect.

[0013] Furthermore, the positioning assembly includes a positioning groove and a positioning block. The positioning groove is distributed in a ring shape on the inner wall of the wellbore. The positioning blocks are evenly distributed along the outer circumferential side of the upper fixing ring. The positioning blocks are embedded in the positioning groove and connected to the wellbore through fasteners.

[0014] Furthermore, the adsorption mechanism includes a cover plate, a filter screen, an adsorption ring and a cleaning assembly. A water-permeable grid is provided at the bottom of the adsorption ring, a clamping ring is provided on the inner wall of the adsorption ring, a clamping groove is provided on the clamping ring, the filter screen is embedded in the clamping groove, the cover plate is fixed to the top of the adsorption ring, a through groove is provided on the outer circumferential side of the adsorption ring, the through groove is connected to the interior of the adsorption ring, and the cleaning assembly is arranged on the cover plate.

[0015] Furthermore, an ear plate is provided on the outer circumferential side surface of the adsorption ring, and a guide hole is provided on the ear plate, and the guide hole matches the guide rod.

[0016] Furthermore, the cleaning component includes a waterproof motor, a rotating shaft and a cleaning strip. The waterproof motor is arranged on the cover plate, the rotating shaft is connected to the waterproof motor, the cleaning strip is distributed in a ring shape on the rotating shaft, the top surface of the cleaning strip contacts the bottom surface of the filter screen, the filter screen is provided with a limiting hole, and the limiting hole matches the rotating shaft.

[0017] Furthermore, the driving assembly includes a winch and a lifting lug, the winch is fixed on the top surface of the manhole cover, the lifting lug is arranged on the top cover, and the winch is connected to the lifting lug through a pull rope.

[0018] Furthermore, the drainage component includes a water pump, a drainage pipe and a water supply pipe. The water pump is arranged on the manhole cover. A connecting hole is arranged on the cover. The water pump is connected to the connecting hole through the water supply pipe, and the drainage pipe is connected to the water pump.

[0019] Furthermore, the water delivery pipe is a hose.

[0020] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0021] 1. Not only can the height position of the adsorption mechanism be adjusted according to the depth of the water level in the precipitation well to meet the drainage requirements, but it is also not easy to cause clogging of the drainage components, thus extending the service life of the lifting drainage mechanism. The upper fixing ring, the lower fixing ring and the guide rod improve the stability and reliability of the up and down movement of the adsorption mechanism, thus avoiding tilting and affecting the drainage effect.

[0022] 2. When the drainage component is working, the water in the precipitation well can enter the adsorption ring through the well groove and be output by the drainage component. After impurities such as stones or weeds enter the adsorption ring, they are filtered through the filter net. The permeable grid can retain impurities such as stones or weeds in the adsorption ring for unified cleaning. The clamping ring and the clamping groove improve the stability and reliability of the filter installation. The cleaning component can clean the surface of the filter net and increase the flow rate of the water.

[0023] 3. The waterproof motor drives the shaft to rotate, which in turn drives the cleaning bar to rotate, thereby cleaning the impurities on the surface of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 This is a rendering of a tunnel foundation pit dewatering well of the utility model;

[0026] Figure 2 It is a schematic diagram of the connection between the lifting type drainage mechanism and the wellbore in the utility model;

[0027] Figure 3 It is an exploded view of the adsorption mechanism in the utility model.

[0028] In the figure: 1-wellbore; 2-well cover; 3-winch; 4-water pump; 5-drain pipe; 6-positioning groove; 7-upper fixing ring; 8-lower fixing ring; 9-guide rod; 10-adsorption mechanism; 11-water pipe; 12-positioning block; 13-cover plate; 14-filter screen; 15-adsorption ring; 16-through groove; 17-ear plate; 18-water-permeable grid; 19-clamp ring; 20-clamping groove; 21-limiting hole; 22-lifting ear; 23-waterproof motor; 24-connection hole; 25-rotating shaft; 26-cleaning strip. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0032] like Figures 1 to 3 As shown, a tunnel foundation pit dewatering well of the utility model comprises: a well shaft 1 and a well cover 2, and the well cover 2 is fixedly installed on the top of the well shaft 1. A controller can be set on the well cover 2, and the controller is connected to an external power supply and is electrically connected to a winch 3, a water pump 4 and a waterproof motor 23.

[0033] It also includes a lifting drainage mechanism arranged in the shaft 1, the lifting drainage mechanism includes an upper fixed ring 7, a lower fixed ring 8, an adsorption mechanism 10 and a guide rod 9, the upper fixed ring 7 is connected to the upper edge of the shaft 1 through a positioning assembly, and the outer diameters of the upper fixed ring 7 and the lower fixed ring 8 are both smaller than the inner diameter of the shaft 1, which is convenient for overall installation and disassembly. The positioning assembly includes a positioning groove 6 and a positioning block 12, the positioning groove 6 is distributed in an annular shape on the inner wall of the shaft 1, the positioning blocks 12 are evenly distributed along the outer circumferential side of the upper fixed ring 7, the positioning blocks 12 are embedded in the positioning groove 6, and are connected to the shaft 1 through fasteners. The design of the positioning blocks 12 and the positioning groove 6 improves the stability of the installation of the entire lifting drainage mechanism. The present application adopts four positioning grooves 6, the four positioning grooves 6 are distributed in an annular shape along the inner wall of the shaft 1, and the four positioning blocks 12 are evenly distributed on the outer circumferential side of the upper fixed ring 7.

[0034] The lower fixing ring 8 is connected to the upper fixing ring 7 through a guide rod 9, and the guide rod 9 is evenly distributed between the upper fixing ring 7 and the lower fixing ring 8. The adsorption mechanism 10 is movably connected to the guide rod 9. The adsorption mechanism 10 includes a cover plate 13, a filter screen 14, an adsorption ring 15 and a cleaning assembly. A water-permeable grid 18 is provided at the bottom of the adsorption ring 15, a clamping ring 19 is provided on the inner wall of the adsorption ring 15, and a clamping groove 20 is provided on the clamping ring 19. The filter screen 14 is embedded in the clamping groove 20. The cover plate 13 is fixed to the top of the adsorption ring 15, and a through groove 16 is provided on the outer circumferential side of the adsorption ring 15. The through groove 16 The interior of the adsorption ring 15 is connected, and the cleaning component is arranged on the cover plate 13. When the drainage component is working, the water in the precipitation well can enter the interior of the adsorption ring 15 through the well groove 16 and be output by the drainage component. After impurities such as stones or weeds enter the adsorption ring 15, they are filtered through the filter net 14. The permeable grid 18 can intercept impurities such as stones or weeds in the adsorption ring 15, which is convenient for unified cleaning. The clamping ring 19 and the clamping groove 20 improve the stability and reliability of the installation of the filter net 14. The cleaning component can clean the surface of the filter net 14 and increase the flow rate of the water flow. A sensor can be installed at the bottom of the adsorption ring 15 to detect the height position of the adsorption mechanism 10 to ensure that the adsorption mechanism 10 is immersed in water.

[0035] An ear plate 17 is provided on the outer circumferential side of the adsorption ring 15. The ear plate 17 is provided with a guide hole, and the guide hole matches the guide rod 9. The design of the ear plate 17 can improve the stability and reliability of the entire adsorption mechanism 10 when it moves up and down.

[0036] The cleaning assembly includes a waterproof motor 23, a rotating shaft 25 and a cleaning strip 26. The waterproof motor 23 is arranged on the cover plate 13, the rotating shaft 25 is connected to the waterproof motor 23, and the cleaning strip 26 is distributed in a ring shape on the rotating shaft 25. The top surface of the cleaning strip 26 contacts the bottom surface of the filter screen 14. The filter screen 14 is provided with a limiting hole 21, and the limiting hole 21 matches the rotating shaft 25. The rotating shaft 25 is driven to rotate by the waterproof motor 23, and then the cleaning strip 26 can be driven to rotate, so as to clean the impurities on the surface of the filter screen 14.

[0037] A driving assembly and a drainage assembly are provided on the manhole cover 2, and the driving assembly and the drainage assembly are connected to the adsorption mechanism 10. The driving assembly includes a winch 3 and a lifting lug 22. The winch 3 is fixed on the top surface of the manhole cover 2, and the lifting lug 22 is provided on the top cover. The winch 3 is connected to the lifting lug 22 through a pull rope. The winch 3 can drive the lifting lug 22 to move by stretching, and then the entire adsorption mechanism 10 can be driven to move up and down to meet the drainage requirements.

[0038] The drainage assembly includes a water pump 4, a drainage pipe 5 and a water pipe 11. The water pump 4 is arranged on the manhole cover 2. The cover plate 13 is provided with a connection hole 24. The water pump 4 is connected to the connection hole 24 through the water pipe 11. The drainage pipe 5 is connected to the water pump 4. The water in the precipitation well can be discharged through the water pipe 11 and the drainage pipe 5 through the water pump 4. The water pipe 11 is a hose, which meets the requirements of the lifting and moving of the adsorption mechanism 10, and does not affect the drainage of the precipitation well. Through the design of the above structure, not only can the height position of the adsorption mechanism 10 be adjusted according to the depth of the water level in the precipitation well to meet the drainage requirements, but it is not easy to cause clogging of the drainage assembly, and the service life of the lifting drainage mechanism is extended. The upper fixing ring 7, the lower fixing ring 8 and the guide rod 9 improve the stability and reliability of the up and down movement of the adsorption mechanism 10, and avoid tilting and affecting the drainage effect.

[0039] When the utility model is actually used, the lifting drainage mechanism is firstly spliced ​​and installed in the wellbore, a suitable manhole cover is processed according to the size of the wellbore, a driving assembly and a drainage assembly are installed on the manhole cover, and connected with the adsorption mechanism, and the manhole cover is closed. The controller installed on the manhole cover controls the entire adsorption mechanism to move up and down along the guide rod, and at the same time the drainage assembly discharges the water in the precipitation well.

[0040] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A tunnel foundation pit dewatering well, comprising: a well shaft; and a manhole cover, the manhole cover being fixedly mounted on the top of the wellbore; Features: It also includes a lifting drainage mechanism arranged in the wellbore, the lifting drainage mechanism includes an upper fixed ring, a lower fixed ring, an adsorption mechanism and a guide rod, the upper fixed ring is connected to the upper edge of the wellbore through a positioning assembly, the lower fixed ring is connected to the upper fixed ring through the guide rod, the guide rod is evenly distributed between the upper fixed ring and the lower fixed ring, the adsorption mechanism is movably connected to the guide rod, the well cover is provided with a driving assembly and a drainage assembly, the driving assembly and the drainage assembly are connected to the adsorption mechanism.

2. A tunnel foundation pit dewatering well according to claim 1, characterized in that: The positioning assembly includes a positioning groove and a positioning block. The positioning groove is distributed in a ring shape on the inner wall of the wellbore. The positioning blocks are evenly distributed along the outer circumferential side of the upper fixing ring. The positioning blocks are embedded in the positioning groove and connected to the wellbore by fasteners.

3. The tunnel foundation pit dewatering well according to claim 1, characterized in that: The adsorption mechanism includes a cover plate, a filter screen, an adsorption ring and a cleaning component. A water-permeable grid is provided at the bottom of the adsorption ring, a clamping ring is provided on the inner wall of the adsorption ring, a clamping groove is provided on the clamping ring, the filter screen is embedded in the clamping groove, the cover plate is fixed to the top of the adsorption ring, a through groove is provided on the outer circumferential side of the adsorption ring, the through groove is connected to the interior of the adsorption ring, and the cleaning component is arranged on the cover plate.

4. A tunnel foundation pit dewatering well according to claim 3, characterized in that: An ear plate is provided on the outer circumferential side surface of the adsorption ring, and a guide hole is provided on the ear plate, and the guide hole matches the guide rod.

5. The tunnel foundation pit dewatering well according to claim 3, characterized in that: The cleaning assembly includes a waterproof motor, a rotating shaft and a cleaning strip. The waterproof motor is arranged on the cover plate, the rotating shaft is connected to the waterproof motor, the cleaning strip is distributed on the rotating shaft in a ring shape, the top surface of the cleaning strip contacts the bottom surface of the filter screen, the filter screen is provided with a limiting hole, and the limiting hole matches the rotating shaft.

6. The tunnel foundation pit dewatering well according to claim 3, characterized in that: The driving assembly includes a winch and a lifting lug, wherein the winch is fixed on the top surface of the manhole cover, the lifting lug is arranged on the cover plate, and the winch is connected to the lifting lug via a pull rope.

7. The tunnel foundation pit dewatering well according to claim 3, characterized in that: The drainage assembly includes a water pump, a drainage pipe and a water supply pipe. The water pump is arranged on the manhole cover. The cover plate is provided with a connecting hole. The water pump is connected to the connecting hole through the water supply pipe, and the drainage pipe is connected to the water pump.

8. The tunnel foundation pit dewatering well according to claim 7, characterized in that: The water delivery pipe is a hose.

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