A dewatering well construction device

Abstract

This invention discloses a dewatering well construction device, including an outer pipe, a drill bit, an embedded dewatering well, a rotating core, and a fixing rod. A first rotary drilling blade is fixed on the inner wall of the outer pipe. The drill bit is detachably fixed to the lower end of the outer pipe. The embedded dewatering well includes an inner pipe, which is coaxially housed within the outer pipe. The rotating core is coaxially housed within the inner pipe, and its lower end is detachably connected to the drill bit. The beneficial effects of this invention are: during construction, the rotating core is driven to rotate by a driving device, which in turn drives the drill bit to rotate and break the soil. The excavated soil moves upward along the gap between the inner and outer pipes and is discharged to the ground. The inner pipe descends continuously with the drill bit. After reaching the designated position, the fixing rod is removed, the connection between the lower end of the rotating core and the drill bit is loosened, and the outer pipe is removed, while the inner pipe is retained as the dewatering well, thus completing the main construction of the dewatering well. This process does not require tower crane assistance, reducing manual labor input.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology, and in particular to a dewatering well construction device. Background Technology

[0002] Dewatering wells are frequently used in the construction of deep foundation pits and pit-within-a-pit structures for basements, especially in areas near rivers and lakes. Dewatering wells effectively lower the water level in the basement of deep foundation pits, particularly within the pit itself. Due to their significant dewatering effect, dewatering wells effectively ensure the quality of the basement concrete construction and improve construction progress. Therefore, dewatering wells are an important dewatering system in foundation pits.

[0003] In the current construction process of dewatering wells, the most commonly used construction method (such as the Chinese invention patent with application number CN200710012638.7) mainly involves binding the steel cage, wrapping the surface of the steel cage with steel mesh or nylon mesh, drilling with a rotating machine, washing the well, lowering the steel cage, filling with gravel and gravel filter material, and sealing the pipe opening with clay. Traditional dewatering well construction involves steel cage binding and lowering, which requires the cooperation of tower cranes, and involves wrapping the surface of the steel cage with steel mesh, washing the well, filling with gravel and gravel filter material, and sealing the pipe opening with clay. The process is complicated and involves a large amount of work. Summary of the Invention

[0004] In view of this, it is necessary to provide a dewatering well construction device to solve the technical problems of complex procedures and large workload in the existing dewatering well construction process.

[0005] To achieve the above objectives, the present invention provides a dewatering well construction device, including an outer pipe, a drill bit, an embedded dewatering well, a rotating core, and a fixing rod;

[0006] The first rotary drilling blade is fixed on the inner wall of the outer tube;

[0007] The drill bit is detachably fixed to the lower end of the outer tube;

[0008] The embedded dewatering well includes an inner tube, which is coaxially embedded inside the outer tube;

[0009] The rotating core is coaxially built into the inner tube, the lower end of the rotating core is detachably connected to the drill bit, and the upper end of the rotating core is used to connect to the drive device.

[0010] The fixing rod is detachably connected to the outer tube, the inner tube, and the rotating core.

[0011] In some embodiments, the upper end of the outer tube has a first through hole, the upper end of the inner tube has a second through hole, the upper end of the rotating core has a third through hole, and the fixing rod is used to be inserted into the first through hole, the second through hole, and the third through hole.

[0012] In some embodiments, the drill bit includes a rotating sleeve, a mounting plate, a plurality of tapered drill bits, and a second rotary drilling blade. The rotating sleeve is detachably connected to the rotating core. The mounting plate is fixed to the rotating sleeve. Each of the tapered drill bits is fixed to the mounting plate. The second rotary drilling blade is fixed to the mounting plate.

[0013] In some embodiments, the rotating sleeve is threadedly connected to the rotating mandrel.

[0014] In some embodiments, the inner tube includes an inner layer, an outer layer, and a filter media core.

[0015] In some embodiments, the thickness of the inner layer and the outer layer is greater than 3.5 mm.

[0016] In some embodiments, an outer water filter layer is provided on the outer layer, and the outer water filter layer is formed by binding and welding steel wires.

[0017] In some embodiments, the inner layer is provided with an inner water filter layer that cooperates with the outer water filter layer, and the inner water filter layer is formed by binding and welding steel wires.

[0018] In some embodiments, the filter media filler is made of lightweight sealing materials and heavy-duty sealing materials.

[0019] In some embodiments, the lightweight sealing material is cotton, and the heavy-duty sealing material is clay.

[0020] Compared with existing technologies, the beneficial effects of the technical solution proposed in this invention are as follows: During construction, the drive device drives the rotating core to rotate, which in turn drives the drill bit to rotate and break the soil. The inner and outer pipes rotate synchronously, allowing the first rotary drilling blade between the inner and outer pipes to excavate and discharge soil. The excavated soil moves upward along the gap between the inner and outer pipes and is discharged to the ground. The inner pipe descends continuously with the drill bit. After reaching the designated position, the fixing rod is removed, the connection between the lower end of the rotating core and the drill bit is loosened, and the outer pipe is removed. The inner pipe is retained as a dewatering well, thus completing the main construction of the dewatering well. This process does not require the assistance of a tower crane, reducing manual labor input. At the same time, the drill bit containing the embedded dewatering well can be prefabricated in the factory in one go, enabling mass production. This simplifies on-site manual construction procedures, reduces on-site construction difficulty, improves construction quality, and accelerates construction progress. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an embodiment of the dewatering well construction device provided by the present invention;

[0022] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the outer tube and the first rotary drilling blade;

[0023] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of the drill bit;

[0024] Figure 4 yes Figure 1 A schematic diagram of the outer layer of the embedded dewatering well in the diagram;

[0025] Figure 5 yes Figure 1 A schematic diagram of the inner layer of an embedded dewatering well;

[0026] Figure 6 yes Figure 1 A schematic diagram of the filter media core of the embedded dewatering well in the image;

[0027] In the diagram: 1-Outer pipe, 2-Drill bit, 21-Rotating sleeve, 22-Mounting plate, 23-Conical drill bit, 24-Second rotary drilling blade, 3-Embedded dewatering well, 31-Inner pipe, 311-Inner layer, 3111-Inner filter layer, 312-Outer layer, 3121-Outer filter layer, 313-Filter media core, 4-Rotating core, 5-Fixing rod, 6-First rotary drilling blade. Detailed Implementation

[0028] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0029] Please refer to Figure 1 and Figure 2 The present invention provides a dewatering well construction device, including an outer pipe 1, a drill bit 2, an embedded dewatering well 3, a rotating core 4, and a fixing rod 5.

[0030] A first rotary drilling blade 6 is fixed to the inner wall of the outer pipe 1. The drill bit 2 is detachably fixed to the lower end of the outer pipe 1. The embedded dewatering well 3 includes an inner pipe 31, which is coaxially housed within the outer pipe 1. The rotating core 4 is coaxially housed within the inner pipe 31, with its lower end detachably connected to the drill bit 2 and its upper end used to connect to a drive device (not shown). The fixing rod 5 is detachably connected to the outer pipe 1, the inner pipe 31, and the rotating core 4.

[0031] During construction, the drive device rotates the core 4, which in turn rotates the drill bit 2 to break the soil. The inner tube 31 and outer tube 1 rotate synchronously, allowing the first rotary drilling blade 6 between the inner and outer tubes to excavate and remove soil. The excavated soil moves upward along the gap between the inner and outer tubes and is discharged to the ground. The inner tube 31 descends with the drill bit 2 until it reaches the designated position. Then, the fixing rod 5 is removed, the connection between the lower end of the core 4 and the drill bit 2 is released, and the outer tube 1 is removed. The inner tube 31 is retained as a dewatering well, thus completing the main construction of the dewatering well. This process does not require tower crane assistance, reducing labor input. Furthermore, the drill bit with the embedded dewatering well can be prefabricated in the factory for mass production, simplifying on-site manual construction procedures, reducing on-site construction difficulty, improving construction quality, and accelerating construction progress.

[0032] To achieve a detachable connection between the fixing rod 5 and the outer tube 1, the inner tube 31, and the rotating core 4, please refer to... Figure 1 In a preferred embodiment, the upper end of the outer tube 1 is provided with a first through hole, the upper end of the inner tube 31 is provided with a second through hole, and the upper end of the rotating core 4 is provided with a third through hole. The fixing rod 5 is used to be inserted into the first through hole, the second through hole, and the third through hole. After the construction is completed, the fixing rod 5 can be removed.

[0033] To implement the specific functions of drill bit 2, please refer to... Figure 1 and Figure 3 In a preferred embodiment, the drill bit 2 includes a rotating sleeve 21, a mounting plate 22, a plurality of tapered drill bits 23, and a second rotary drilling blade 24. The rotating sleeve 21 is detachably connected to the rotating core 4. The mounting plate 22 is fixed to the rotating sleeve 21, and each of the tapered drill bits 23 is fixed to the mounting plate 22. The second rotary drilling blade 24 is fixed to the mounting plate 22. The rotating sleeve 21, mounting plate 22, and second rotary drilling blade 24 are all cast from Q235b or higher grade steel. The rotating sleeve 21, mounting plate 22, each tapered drill bit 23, and second rotary drilling blade 24 are fully welded together. The tapered drill bits 23 are made of Q345B steel and are used for breaking through rock, soil, and gravel. The second rotary drilling blade 24 is formed by welding two 90-degree circular blades to the rotating sleeve 21 and is used for rotary drilling and propulsion of soil and rocks.

[0034] To specifically achieve the detachable connection between the rotating sleeve 21 and the rotating core 4, please refer to... Figure 1 In a preferred embodiment, the rotating sleeve 21 is threadedly connected to the rotating core 4. The rotating sleeve 21 and the rotating core 4 are made of Q345B steel and are threadedly connected. After construction is completed, the rotating sleeve 21 and the rotating core 4 can be separated by rotating the rotating core 4 counterclockwise.

[0035] To implement the specific functions of inner tube 31, please refer to... Figure 1 , Figure 4 , Figure 5 and Figure 6 In a preferred embodiment, the inner tube 31 includes an inner layer 311, an outer layer 312, and a filter media core 313. The thickness of the inner layer 311 and the outer layer 312 is greater than 3.5 mm. The inner layer 311 and the outer layer 312 are fully welded to the rotating sleeve 21.

[0036] To facilitate the infiltration of groundwater into inner pipe 31, please refer to... Figure 1 , Figure 4 , Figure 5 and Figure 6 In a preferred embodiment, the outer layer 312 has a diameter of 600 mm. An outer filter layer 3121 is provided from 200 mm at the bottom upwards for 3 m. The outer filter layer 3121 is made of 1 mm x 1 mm steel wire bound and welded together, with a 200 mm gap at the bottom to facilitate a secure connection between the upper and lower wire meshes. The inner layer 311 has a diameter of 400 mm. An inner filter layer 3111, which cooperates with the outer filter layer 3121, is provided from 200 mm at the bottom upwards for 3 m. The inner filter layer 3111 is made of 1 mm x 1 mm steel wire bound and welded together, and has circular holes with a diameter of φ100 x 500 mm.

[0037] To understand the specific functions of filter media filler 313, please refer to... Figure 1 , Figure 4 , Figure 5 and Figure 6 In a preferred embodiment, the filter media core 313 is made of lightweight sealing material, crushed stone material, gravel material, cobblestone material, and heavy-duty sealing material. The lightweight sealing material is cotton, which has the ability to expand with rainwater, and its light weight can reduce the overall weight of the rainwater well head. The heavy-duty sealing material is clay.

[0038] To better understand this invention, the following is combined with... Figures 1-6The working process of the dewatering well construction device provided by this invention will be described in detail below: During construction, the drive device drives the rotating core 4 to rotate, which in turn drives the drill bit 2 to rotate and break the soil. The inner tube 31 and the outer tube 1 rotate synchronously, allowing the first rotary drilling blade 6 between the inner tube 31 and the outer tube 1 to excavate and discharge soil. The excavated soil moves upward along the gap between the inner tube 31 and the outer tube 1 and is discharged to the ground. The inner tube 31 follows the drill bit 2 and descends continuously. After reaching the designated position, the fixing rod 5 is pulled out, and then the rotating core 4 is rotated counterclockwise to separate the rotating sleeve 21 from the rotating core 4. The outer tube 1 is then removed, while the inner tube 31 is retained as a dewatering well, thus completing the main construction of the dewatering well. This process does not require the assistance of a tower crane, reducing manual labor input. At the same time, the drill bit containing the embedded dewatering well can be prefabricated in the factory in one go, enabling mass production. This simplifies the manual construction procedures on site, reduces the difficulty of on-site construction, improves construction quality, and accelerates the construction progress.

[0039] The beneficial effects of the technical solution provided by this invention include:

[0040] (1) The structure is simple, avoiding the need for tower cranes to assist in construction and reducing labor input;

[0041] (2) Drill bits with embedded dewatering wells can be prefabricated in the factory in one go and mass-produced;

[0042] (3) Simplify construction procedures, reduce on-site construction difficulties, improve construction quality, and accelerate construction progress;

[0043] (4) Integrated prefabrication technology for dewatering wells ensures controllable quality of dewatering wells;

[0044] (5) The recyclable outer tube 1 and rotating core 4 can effectively reduce the project cost.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A dewatering well construction device, characterized in that, Includes outer casing, drill bit, embedded dewatering well, core rotating device, and fixing rod; The first rotary drilling blade is fixed on the inner wall of the outer tube; The drill bit is detachably fixed to the lower end of the outer tube; The embedded dewatering well includes an inner tube, which is coaxially embedded inside the outer tube; The rotating core is coaxially built into the inner tube, the lower end of the rotating core is detachably connected to the drill bit, and the upper end of the rotating core is used to connect to the drive device. The fixing rod is detachably connected to the outer tube, the inner tube, and the rotating core.

2. The dewatering well construction device according to claim 1, characterized in that, The upper end of the outer tube has a first through hole, the upper end of the inner tube has a second through hole, the upper end of the rotating core has a third through hole, and the fixing rod is used to be inserted into the first through hole, the second through hole and the third through hole.

3. The dewatering well construction device according to claim 1, characterized in that, The drill bit includes a rotating sleeve, a mounting plate, several tapered drill bits, and a second rotary drilling blade. The rotating sleeve is detachably connected to the rotating core. The mounting plate is fixed on the rotating sleeve. Each of the tapered drill bits is fixed on the mounting plate. The second rotary drilling blade is fixed on the mounting plate.

4. The dewatering well construction device according to claim 3, characterized in that, The rotating sleeve is threadedly connected to the rotating core.

5. The dewatering well construction device according to claim 1, characterized in that, The inner tube includes an inner layer, an outer layer, and a filter media core.

6. The dewatering well construction device according to claim 5, characterized in that, The thickness of the inner layer and the outer layer is greater than 3.5 mm.

7. The dewatering well construction device according to claim 5, characterized in that, An external water filter layer is provided on the outer layer, which is made of steel wire bound and welded together.

8. The dewatering well construction device according to claim 7, characterized in that, The inner layer is provided with an inner water filter layer that cooperates with the outer water filter layer. The inner water filter layer is made of steel wire bound and welded together.

9. The dewatering well construction device according to claim 5, characterized in that, The filter media core is made of lightweight and heavy-duty sealing materials.

10. The dewatering well construction device according to claim 9, characterized in that, The lightweight sealing material is cotton, and the heavy-duty sealing material is clay.

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