A dewatering construction method for emergency dewatering small pipe well

Abstract

The present application relates to a dewatering construction method for a small pipe well for emergency dewatering, which comprises the following steps: S1: measuring and locating the pipe well point where dewatering is required; S2: setting up a water pump, placing a first pipe, and opening a plurality of water filter holes on the first pipe, wherein the water filter holes are arranged in a plum blossom shape, and a filter screen is wrapped around the first pipe; S3: drilling a dewatering hole on the ground; S4: placing the first pipe into the dewatering hole; S5: connecting the water pump and the first pipe with a soft pipe, and starting the water pump for dewatering; the present application can quickly lower the water level in an area to the water level required for construction in a short time, ensure that the soil can be excavated normally, further reduce the various influences caused by the adverse effects of dewatering during the construction process, and thus further improve the stability and safety of foundation pit construction.

Description

Technical Field

[0001] The present application relates to the field of deep foundation pit dewatering, and in particular to a dewatering construction method for a small emergency dewatering well. Background Art

[0002] With the continuous development of modern building technology, the pace of science and technology and urbanization is accelerating. In order to make use of limited land, people have to turn their attention to high-rise and underground spaces. In recent years, the construction of high-rise buildings has increased, and the foundation of buildings has been buried deeper and deeper. Engineering construction often needs to be carried out in aquifers, and construction in water-bearing strata is prone to soil collapse, quicksand and other soil instability phenomena. Therefore, it is necessary to take precipitation measures to lower the groundwater level below the construction site to ensure the stability of soil excavation, prevent quicksand and collapse, and enable foundation pit excavation and construction of foundations and basements under drainage conditions. At the same time, it accelerates the consolidation of soft soil foundations, improves the strength and bearing capacity of soft soil foundations, and reduces the settlement of buildings. Therefore, the study of deep foundation pit precipitation, especially the situation where the original precipitation fails and emergency precipitation is required for excavation operations, has very important engineering practical significance.

[0003] In view of the above-mentioned related technologies, the inventor believes that it is necessary to provide a precipitation construction method with obvious precipitation effect in a short time. Summary of the invention

[0004] In order to provide a precipitation construction method with obvious precipitation effect in a short time, the present application provides a precipitation construction method for an emergency precipitation small pipe well.

[0005] The present application provides a method for constructing a small emergency dewatering well using the following technical solutions:

[0006] A dewatering construction method for an emergency dewatering small pipe well comprises the following steps:

[0007] S1: Measure and locate the pipe well points that need to be dewatered;

[0008] S2: setting up a water pump, placing a first pipe, and opening a plurality of water filter holes on the first pipe, wherein the water filter holes are arranged in a plum blossom shape, and a filter screen is wrapped outside the first pipe;

[0009] S3: Drilling precipitation holes on the ground;

[0010] S4: placing the first pipe into the precipitation hole;

[0011] S5: Use a soft pipe to connect the water pump and the first pipe, and start the water pump to reduce water.

[0012] By adopting the above technical solution, the water level in an area can be quickly lowered to the water level required for construction in a short period of time, ensuring that the soil can be excavated normally, further reducing the various impacts caused by adverse precipitation during the construction process, thereby further improving the stability and safety of foundation pit construction.

[0013] Preferably, the step S3: drilling a drainage hole on the ground further comprises:

[0014] S31: providing a fixed base formed by connecting a plurality of second pipes end to end;

[0015] S32: a sliding frame radially surrounded by at least three third pipes is arranged on the fixed base, wherein one end of the third pipe is fixedly connected to at least one of the second pipes;

[0016] S33: rotatably sleeved on the sliding frame a sliding ring that slides along the length direction of the sliding frame;

[0017] S34: Setting up a drilling rig on the sliding ring;

[0018] S35: Install a drill rod on the drilling rig to drill a hole. The drilling rig drills the hole from top to bottom by itself. After the drilling rig falls to the bottom of the sliding frame, the sliding ring and the drilling rig are further lifted to the top of the sliding frame, and the drill rod is connected to continue drilling from top to bottom until the drilling is completed.

[0019] By adopting the above technical solution, the drilling rig drills holes from top to bottom by itself, and the workers only need to hold the sliding frame. After the drilling rig falls to the bottom, the drill rod is connected to continue to lift the sliding ring and the drilling rig to the top of the sliding frame, and the hole is drilled from top to bottom, and the process is repeated until the drilling is completed.

[0020] Preferably, the step S34: setting up a drilling rig on the sliding ring further comprises:

[0021] S341: inserting a cross bar between two of the third pipes;

[0022] S342: Fixing the cross bar and the sliding ring;

[0023] S343: Install the drilling rig on the cross bar.

[0024] By adopting the above technical solution, the cross bar can facilitate the sliding ring to carry the drilling rig, and can also limit the rotation range of the drilling rig housing.

[0025] Preferably, the sliding ring is surrounded by all the third pipes, and the sliding ring is not tilted in the sliding frame.

[0026] By adopting the above technical solution, the sliding ring slides in the sliding frame, so that the sliding ring will not be stuck by external objects inside and outside, which can ensure the smooth adjustment of the drilling rig position. At the same time, it is more convenient to install, and there is no need to put all the third pipes into the sliding ring one by one. The process of putting all the third pipes into the sliding ring one by one is very complicated and laborious. Now, the sliding ring can be inserted between adjacent third pipes, and then the third pipe can be moved to complete the installation by rotating the sliding ring to a certain angle.

[0027] Preferably, the step S34: setting up a drilling rig on the sliding ring further comprises:

[0028] One end of the drilling rig extends to the area between the adjacent third pipes, and the length of the drilling rig extending into the area is not greater than the displacement of the end of the drilling rig in the area when the drilling rig is started and the maximum torque is applied.

[0029] By adopting the above technical solution, when the working torque of the drilling rig reaches the maximum, the end of the drilling rig will be displaced and rub through the third pipe into the adjacent area, thereby protecting the internal power structure of the drilling rig. At the same time, the sound emitted can also reflect the operator, which is beneficial to ensure the working stability of the drilling rig and also help to extend the working life of the drilling rig.

[0030] Preferably, the step S34: setting up a drilling rig on the sliding ring further comprises:

[0031] S341: a cross bar is inserted between two of the third pipes, and a limit rod is installed on the sliding ring; one end of the limit rod extends to the area between the adjacent third pipes, and the length of the limit rod extending into the area is not greater than the displacement of the end of the limit rod in the area when the drilling rig is started and the maximum torque is applied;

[0032] S342: Fixing the cross bar and the sliding ring;

[0033] S343: Install the drilling rig on the cross bar.

[0034] By adopting the above technical solution, when the working torque of the drilling rig reaches the maximum, the cross bar will be displaced and rub through the third pipe into the adjacent area, thereby protecting the internal power structure of the drilling rig and the end of the drilling rig, which is beneficial to ensuring the working stability of the drilling rig and also beneficial to extending the working life of the drilling rig.

[0035] Preferably, the step S4: placing the first pipe into the precipitation hole further comprises:

[0036] A first filler of a set thickness is buried around the pores of the drainage hole, wherein the set thickness is 10 mm to 120 mm, and the first filler is medium-coarse sand.

[0037] By adopting the above technical solution, the first filler can not only stabilize the position of the first pipeline, but also play a filtering role.

[0038] Preferably, a plurality of binding members for pressing the filter screen are disposed outside the first pipe, and the plurality of binding members are distributed along the length direction of the first pipe.

[0039] By adopting the above technical solution, the binding members can fix the filter screen, and at the same time, the filter screen between adjacent binding members can evenly block foreign particles, thereby reducing the probability of large-scale accumulation of foreign matter on the filter screen.

[0040] In summary, the present application includes at least one of the following beneficial technical effects:

[0041] 1. The materials used in the entire construction are common, simple and easy to purchase materials with low cost. Only 3 workers are needed during the construction, 1 for moving and setting up the water pump, 1 for positioning measurement and hand-held sliding frame, and 1 for connecting drill pipes, lowering casing, connecting water pumps, etc. The construction time for a single pipe does not exceed 2 hours, which is very convenient and fast. The water flow per hour is large, and the overall precipitation effect is obvious.

[0042] 2. The drill rig drills holes from top to bottom by itself, and the workers only need to hold the sliding frame. After the drill rig falls to the bottom, connect the drill rod to continue to lift the sliding ring and the drill rig to the top of the sliding frame, and drill holes from top to bottom, repeating the process until the drilling is completed. It is convenient and quick;

[0043] 3. Insert the sliding ring between the adjacent third pipes, then move the third pipe to allow the sliding ring to rotate a certain angle to complete the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic diagram of the method flow of an embodiment of the present application;

[0045] Figure 2 It is a schematic diagram of the overall structure of the precipitation of the embodiment of the present application;

[0046] Figure 3 This is a schematic diagram of the overall structure of the sliding ring sleeve outside the sliding frame in the embodiment of the present application;

[0047] Figure 4 It is a schematic diagram of the overall structure of the sliding ring sleeve in the sliding frame of the embodiment of the present application.

[0048] Figure numerals: 1. water pump; 2. first pipeline; 21. water filter hole; 22. filter screen; 23. binding parts; 3. drilling rig; 4. second pipeline; 5. fixed base; 6. third pipeline; 7. sliding frame; 8. sliding ring; 9. cross bar; 10. limit rod; 11. first filler; 12. soft pipeline. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-4 This application is described in further detail.

[0050] The embodiment of the present application discloses a dewatering construction method for a small-tube well for emergency dewatering.

[0051] Reference Figure 1 The dewatering construction method of the emergency dewatering small pipe well includes the following steps:

[0052] S1: Measure and locate the pipe well points where precipitation is required.

[0053] S2: Install a water pump 1, place a first pipe 2, and open a plurality of water filter holes 21 on the first pipe 2. The water filter holes 21 are arranged in a plum blossom shape, and a filter screen 22 is wrapped around the first pipe 2. Figure 2 The first pipe 2 is a PVC pipe with a diameter of 80 mm and a length of 8 m. The water filter holes 21 have a diameter of 15 mm, a spacing of 100 mm, and a total length of 6 m. The filter screen 22 is a woven cloth. The first pipe 2 is provided with a plurality of tying members 23 for pressing the filter screen 22. The tying members 23 can be made of No. 10 lead wire. The plurality of tying members 23 are distributed along the length direction of the first pipe 2, and a tying member 23 is provided every 20 mm to 30 mm. The tying members 23 can fix the filter screen 22, and at the same time, the filter screen 22 between adjacent tying members 23 can evenly block foreign particles, reducing the probability of large accumulation of foreign matter on the filter screen 22.

[0054] S3: Drilling water holes in the ground. Figure 3, a small drilling rig 3 with a drill bit diameter of 150mm, a drill rod diameter of 20mm and a power of 1.5kw is used for drilling. In order to prevent the drilling rig 3 from shaking violently when drilling, affecting the quality of the hole and increasing the difficulty of workers' operation, S3 also includes: S31: a fixed base 5 surrounded by multiple second pipes 4 connected end to end is set. Specifically, four DN32 galvanized steel pipes with a length of 300mm can be used to weld a square fixed base 5. S32: a sliding frame 7 surrounded by at least three third pipes 6 in the radial direction is set on the fixed base 5, and one end of the third pipe 6 is fixedly connected to at least one second pipe 4. The third pipe 6 is a DN32 galvanized steel pipe with a length of 1.8m. S33: a sliding ring 8 that slides along the length direction of the sliding frame 7 is rotatably sleeved on the sliding frame 7. The diameter of the sliding ring 8 can be 300mm. S34: the drilling rig 3 is set on the sliding ring 8. S34 also includes: S341: a cross bar 9 is passed between two third pipes 6. S342: Fix the cross bar 9 and the sliding ring 8. S343: Install the drill rig 3 on the cross bar 9. The cross bar 9 can facilitate the sliding ring 8 to carry the drill rig 3, and can also limit the rotation range of the housing of the drill rig 3. S35: Install the drill rod on the drill rig 3 to drill holes. The drill rig 3 drills holes from top to bottom by itself. After the drill rig 3 falls to the bottom of the sliding frame 7, the sliding ring 8 and the drill rig 3 are further lifted to the top of the sliding frame 7, and the drill rod is connected to continue drilling from top to bottom until the drilling is completed.

[0055] In the above S3, the sliding ring 8 is sleeved outside all the third pipes 6, but in some other embodiments, refer to Figure 4 , the sliding ring 8 can also be surrounded by all the third pipes 6, and the posture of the sliding ring 8 in the sliding frame 7 is not tilted. The sliding ring 8 slides in the sliding frame 7, so that the sliding ring 8 will not be stuck by external objects, which can ensure that the position adjustment of the drilling rig 3 is carried out smoothly, and it can also be more convenient during installation. It is not necessary to put all the third pipes 6 into the sliding ring 8 one by one. The process of putting all the third pipes 6 into the sliding ring 8 one by one is very complicated and laborious. Now, the sliding ring 8 can be inserted between the adjacent third pipes 6, and then the third pipes 6 are moved, and the sliding ring 8 is rotated to a certain angle to complete the installation. One end of the drilling rig 3 extends to the area between the adjacent third pipes 6, and the length of the area is not greater than the displacement of the end of the drilling rig 3 in the area when the drilling rig 3 is started and the maximum torque is applied. When the working torque of the drilling rig 3 reaches the maximum, the end of the drilling rig 3 will be displaced and rubbed through the third pipe 6 to enter the adjacent area, protecting the internal power structure of the drilling rig 3. At the same time, the sound emitted can also reflect the operator, which is conducive to ensuring the working stability of the drilling rig 3 and also conducive to extending the working life of the drilling rig 3.

[0056] In addition, in some other embodiments, reference Figure 4, S341 can also be: installing a limit rod 10 on the sliding ring 8. One end of the limit rod 10 extends to the area between the adjacent third pipes 6, and the length of the limit rod 10 extending into the area is not greater than the displacement of the end of the limit rod 10 in the area when the drilling rig 3 is started and the maximum torque is applied. S342: Fix the cross bar 9 and the sliding ring 8. S343: Install the drilling rig 3 on the cross bar 9. When the working torque of the drilling rig 3 reaches the maximum, the cross bar 9 will displace and rub through the third pipe 6 to enter the adjacent area, which protects the internal power structure of the drilling rig 3 and the end of the drilling rig 3, which is beneficial to ensure the working stability of the drilling rig 3 and also helps to extend the working life of the drilling rig 3.

[0057] S4: Place the first pipe 2 into the precipitation hole. Figure 2 Before placing the first pipe 2, a first filler 11 of a set thickness is buried around the pores of the precipitation hole. The set thickness is 10 mm to 120 mm, and the first filler 11 is medium-coarse sand. The first filler 11 can not only stabilize the position of the first pipe 2, but also play a filtering role.

[0058] S5: Use the soft pipe 12 to connect the water pump 1 and the first pipe 2, and start the water pump 1 to reduce water. The water pump 1 is a vacuum pump of model JSJ-60 and power of 7.5kw, and the soft pipe 12 is a rubber pipe.

[0059] The implementation principle of the embodiment is: first measure and locate the pipe entry point, then set up the water pump 1, then the fixed base 5, sliding frame 7, sliding ring 8 and cross bar 9 can be made on site, and after the mechanical structure is built, the drilling rig 3 is installed on the sliding ring 8, and the drill rod is installed. When drilling, the drilling rig 3 drills from top to bottom by itself, and the workers only need to hold the sliding frame 7. After the drilling rig 3 falls to the bottom, the drilling rod is connected to continue to lift the sliding ring 8 and the drilling rig 3 to the top of the sliding frame 7, and drill from top to bottom, repeating until the drilling is completed. The materials used in the entire construction are common, simple and easy to purchase materials with low cost; only three workers are needed during construction, one is responsible for moving and setting up the water pump 1, one is responsible for positioning and measuring and holding the sliding frame 7, and one is responsible for connecting the drill rod, lowering the casing, connecting the water pump 1, etc. The construction time of a single root does not exceed 2 hours, which is very convenient and fast; the water flow rate per hour can reach 3.2m³, and the overall precipitation effect is obvious. The water level in an area can be quickly lowered to the required water level in a short period of time, ensuring that the soil can be excavated normally, further reducing the various impacts caused by adverse precipitation during the construction process, thereby further improving the stability and safety of foundation pit construction.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A dewatering construction method for an emergency dewatering small pipe well, characterized in that: The steps include: S1: Measure and locate the pipe well points that need to be dewatered; S2: erecting a water pump (1), placing a first pipe (2), and opening a plurality of water filter holes (21) on the first pipe (2), wherein the water filter holes (21) are arranged in a plum blossom shape, the first pipe (2) is wrapped with a filter screen (22), and the first pipe (2) is provided with a plurality of binding members (23) for pressing the filter screen (22), and the plurality of binding members (23) are distributed along the length direction of the first pipe (2); S3: Drilling precipitation holes on the ground; S4: placing the first pipe (2) into the drainage hole; filling the first filler (11) with a set thickness around the pores of the drainage hole, wherein the set thickness is 10 mm to 120 mm, and the first filler (11) is medium-coarse sand; S5: using a soft pipe (12) to connect the water pump (1) and the first pipe (2), and starting the water pump (1) to perform precipitation; The step S3: drilling a drainage hole on the ground further comprises: S31: providing a fixed base (5) formed by connecting a plurality of second pipes (4) end to end; S32: a sliding frame (7) radially surrounded by at least three third pipes (6) is arranged on the fixed base (5), one end of the third pipe (6) being fixedly connected to at least one of the second pipes (4); S33: a sliding ring (8) is rotatably sleeved on the sliding frame (7) and slides along the length direction of the sliding frame (7); the sliding ring (8) is surrounded by all the third pipes (6), and the sliding ring (8) is not tilted in the sliding frame (7); S34: installing a drilling rig (3) on the sliding ring (8); S341: inserting a cross bar (9) between the two third pipes (6); S342: Fixing the cross bar (9) and the sliding ring (8); S343: installing the drilling machine (3) on the cross bar (9); One end of the drilling rig (3) extends to the area between adjacent third pipes (6), and the length of the end of the drilling rig (3) extending into the area is not greater than the displacement of the end of the drilling rig (3) in the area when the drilling rig (3) is started and the maximum torque is applied; Alternatively, the step S34: installing a drilling rig (3) on the sliding ring (8): S341: a cross bar (9) is passed between two of the third pipes (6), and a limit rod (10) is installed on the sliding ring (8); one end of the limit rod (10) extends to the area between adjacent third pipes (6), and the length of the limit rod (10) extending into the area is not greater than the displacement of the end of the limit rod (10) in the area when the drilling rig (3) is started and the maximum torque is applied; S342: Fixing the cross bar (9) and the sliding ring (8); S343: installing the drilling machine (3) on the cross bar (9); S35: Install a drill rod on the drilling machine (3) to drill a hole. The drilling machine (3) drills the hole from top to bottom by itself. After the drilling machine (3) falls to the bottom of the sliding frame (7), the sliding ring (8) and the drilling machine (3) are further lifted to the top of the sliding frame (7), and the drill rod is connected to continue drilling from top to bottom until the drilling is completed.

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