Once-formed dewatering well and construction method thereof

Abstract

The invention relates to the field of building construction, and provides a one-time forming dewatering well which comprises a fixing steel pipe, a filtering piece and a filtering material layer. A pipe shoe is arranged at the bottom of the fixed steel pipe; the filtering piece extends into the pipe bottom from the pipe opening of the fixed steel pipe; the filter piece is filled with the filter material layer; and the fixed steel pipe is pressed from the ground to the underground to form the precipitation well. The dewatering well forming device has the effect that the dewatering well which is high in filterability and can be repeatedly used is conveniently formed. In addition, the invention further provides a construction method of the one-time forming dewatering well.

Description

Technical Field

[0001] The present application relates to the field of construction, and in particular to a one-time formed precipitation well and a construction method thereof. Background Art

[0002] Currently, in construction projects, drainage wells are often required to drain groundwater to ensure the safety and smooth progress of foundation construction. Traditionally, drainage well construction often involves drilling equipment, which is not only time-consuming and costly, but also prone to drill sticking in complex geological conditions.

[0003] Common methods for constructing dewatering wells include using a rotary drilling rig with a mud wall method to drill holes, then placing pipes and pouring cement mortar to form them; or using a vibratory hammer to drive in prefabricated reinforced concrete piles as dewatering wells.

[0004] Conventional construction methods have a long construction period and relatively high costs, and generally have disadvantages such as low efficiency, high cost, and limited scope of application. Summary of the Invention

[0005] In order to improve the above-mentioned problems, the present application provides a one-time formed precipitation well and a construction method thereof.

[0006] The present application provides a one-step forming precipitation well and its construction method using the following technical solutions: A one-step formed precipitation well comprises a fixed steel pipe, a filter element and a filter material layer; a pipe boot is provided at the bottom of the fixed steel pipe; the filter element extends from the pipe mouth of the fixed steel pipe to the bottom of the pipe; the filter material layer is filled in the filter element; the fixed steel pipe is pressed down from the ground to the underground to form a precipitation well.

[0007] By adopting the above technical solution, high-strength fixed steel pipes are used to replace traditional drilling tools. On the basis of the original ground structure, they are directly implanted into the ground with the help of external pressure to form a stable and reliable precipitation well main structure, so that the precipitation well can be formed in one step, realizing a new precipitation well construction mode that is fast, convenient, economical and efficient. On this basis, the corresponding water pump system, filter elements and filter material layers are configured to establish an effective groundwater drainage channel in the shortest time, ensuring the stable and safe operation of the pumping equipment and reducing damage. At the same time, the fixed steel pipe can be pulled out for easy use next time. This recycling method can reduce consumables and can be reused.

[0008] Optionally, the filter element is an annular filter structure, including a vertical fixing part, an annular fastening part and a filter net; several of the vertical fixing parts are fitted with the inner diameter of the fixed steel pipe and form a supporting member of the annular filter structure; several of the annular fastening parts are fixedly connected to the vertical fixing part, and each of the annular fastening parts is arranged in a group at a preset distance to form an annular steel cage; the filter net is laid on the vertical fixing part and the annular fastening part to form a complete annular filter structure.

[0009] By adopting the above technical solution, a number of vertical fixing parts are used to provide support for the inner wall of the fixed steel pipe, and a number of annular fastening parts are used to connect the number of vertical fixing parts to form a steel cage, thereby ensuring the stability of the overall annular filter frame. The filter net then provides gaps and intervals covering the steel cage, so that large particles cannot pass through the filter net, thereby ensuring the safety of the pumping equipment in the filter net.

[0010] Optionally, the vertical fixing portion is bent near one end of the pipe shoe to form a sealing structure, the sealing structure covers the filter screen, and the filter material layer is located inside the sealing structure.

[0011] By adopting the above technical solution, the filter material layer is fixed in the filter element through the sealing structure, and the filter mesh wraps the filter material evenly to prevent the filter material from dispersing, making the gaps between the filter materials smaller and the connection tighter.

[0012] Optionally, the annular fastening portion is tied along the inner wall of the supporting member formed by several of the vertical fixing portions.

[0013] By adopting the above technical solution, the fixed steel pipe is installed by pressing down. During the installation process, the bottom of the fixed steel pipe and the pipe boot will be subjected to greater pressure. For example, the pressure of mud or water pressure squeezing inward will cause the steel cage arranged at the bottom of the fixed steel pipe to be subjected to inward pressure. Therefore, the vertical fixing part is forced to bend inward, and is hindered by the annular fastening part and cannot bend, thereby improving the compressive resistance. This method can mainly prevent the external pressure from being too large, which will cause the entire steel cage to be flattened.

[0014] Optionally, the annular fastening portion is a spiral stirrup or annular stirrup.

[0015] By adopting the above technical solution, the annular stirrups can provide stable clamping ability and compression and bending resistance, thereby improving the overall stability of the steel cage and being suitable for relatively hard strata. The use of spiral stirrups reduces material consumption and is suitable for relatively soft strata.

[0016] Optionally, the filter screen is provided with at least two layers.

[0017] By adopting the above technical solution, the more layers of the filter screen are set, the better the filtering effect and supporting effect are.

[0018] Optionally, at least one layer of the filter screen is provided on a side close to the inner wall of the fixed steel pipe; and at least one layer of the filter screen is provided on a side close to the annular fastening portion.

[0019] By adopting the above technical solution, the filter screen on the side near the annular fastening part mainly provides support and filtration for the filter material layer. Even if the filter material layer is too heavy or there are sharp stones, which break the filter screen of this layer, it will not affect the filtering effect of the filter screen close to the fixed steel pipe. The two provide different functions respectively to ensure the stability of the filtering effect.

[0020] A construction method for a one-step forming precipitation well comprises the following steps: Measure and mark the exact location needed for the precipitation well; Arrange the downward pressure device or pressure-bearing device and align it with the target point; Adjust the thrust, start the downward pressure device to push the fixed steel pipe underground, and slowly push the fixed steel pipe to make it sink steadily; Monitor the progress of settlement and stop the machine immediately when it reaches the designated depth. Fixed steel pipes are inserted into the ground to form the preliminary structural framework. The filter element in the fixed steel pipe can be pre-installed or installed after the preliminary structural frame is formed. When pre-installed, before the pressing device is activated, the filter element is inserted into the fixed steel pipe along the wall, and then the fixed steel pipe is pressed down by the pressing device. If it is installed after the preliminary structural frame is formed, the filter element is inserted into the fixed steel pipe after the fixed steel pipe is inserted into the ground. Place the prepared water pump inside the fixed steel pipe, make electrical connections, and connect the power line; Turn on the water pump to start pumping water. Due to the presence of filter elements and filter material layers, larger particles can be effectively prevented from entering the pipe and causing blockage.

[0021] By adopting the above technical solution, a precipitation well can be formed conveniently in one step, effectively preventing damage to the water pump during operation and improving safety and equipment safety.

[0022] Optionally, an auxiliary support frame is added at the dewatering wellhead.

[0023] By adopting the above technical solution, the auxiliary support frame can be a ring-shaped support frame for the fixed steel pipe, so that the fixed steel pipe remains vertical during the construction process, and after the construction is completed, it is erected at the mouth of the precipitation well, which can improve the rigidity and balance of the overall precipitation well.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. Using high-strength fixed steel pipes instead of traditional drilling tools, they are directly implanted into the ground based on the original ground structure with the help of external pressure, forming a stable and reliable precipitation well main structure. This allows the precipitation well to be formed in one go, realizing a new precipitation well construction model that is fast, convenient, cost-effective and efficient. On this basis, by configuring the corresponding water pump system, filter elements and filter material layers, an effective groundwater drainage channel can be established in the shortest possible time, ensuring the stable and safe operation of the pumping equipment and reducing damage. 2. A plurality of vertical fixing parts provide support by fitting and fixing the inner wall of the steel pipe. A plurality of annular fastening parts connect the plurality of vertical fixing parts to form a steel cage, thereby ensuring the stability of the overall annular filter frame. The filter screen provides gaps and intervals covering the steel cage, so that large particles cannot pass through the filter screen, thereby ensuring the safety of the pumping equipment inside the filter screen. 3. The filter material layer is fixed in the filter element through the sealing structure, and the filter net wraps the filter material evenly to prevent the filter material from dispersing, making the gap between the filter materials smaller and the connection tighter; 4. When the steel cage is subjected to inward pressure, the vertical fixing part is forced to bend inward, but is hindered by the annular fastening part and cannot bend, thereby improving the compressive resistance. This method can mainly prevent the external pressure from being too large, which may cause the entire steel cage to be flattened. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the planar structure of a precipitation well in one embodiment of the present application; Figure 2 This is a schematic diagram of a first three-dimensional structure of a filter element in some embodiments of the present application; Figure 3 This is a schematic diagram of a second three-dimensional structure of a filter element in some embodiments of the present application; Figure 4 This is a schematic diagram of a third three-dimensional structure of a filter element in some embodiments of the present application; Figure 5 This is a schematic diagram of a fourth three-dimensional structure of a filter element in some embodiments of the present application; Figure 6 is a schematic diagram of the cross-sectional structure of a fixed steel pipe in some embodiments of the present application; The marks in the accompanying drawings are: 1. Fixed steel pipe, 10. Reserved hanging hole, 11. Fixed protrusion, 111. Disconnection port, 12. Support ring, 13. Pipe cover, 2. Filter element, 21. Vertical fixing part, 211. Sealing structure, 22. Annular fastening part, 23. Filter screen, 24. Limiting ring, 241. Inner groove, 25. Turning handle, 3. Filter material layer, 4. Pipe boot, 41. Conical ring, 5. Water pump. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the information disclosed in this application. The present application can also be implemented or applied through different specific embodiments. The details in this application can also be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless they conflict.

[0027] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0028] In the description of this application, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this application, as well as features of different embodiments or examples, unless otherwise contradictory.

[0029] Furthermore, the terms "first" and "second" are used solely to indicate a target and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the context of this application, "plurality" means two or more, unless otherwise specifically defined.

[0030] Throughout this specification, when a device is said to be "connected" to another device, this includes not only "direct connection" but also "indirect connection" with other elements interposed therebetween. Furthermore, when a device is said to "include" a certain component, unless otherwise stated, this does not exclude the inclusion of other components but rather implies that the device may include other components.

[0031] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0032] The embodiments of the present application disclose a one-time formed precipitation well and a construction method thereof.

[0033] A one-time forming precipitation well, reference Figure 1As shown, it includes a fixed steel pipe 1, a filter element 2 and a filter material layer 3; the fixed steel pipe 1 can be made of high-strength steel, such as Q235 material, and the thickness can be 5mm-8mm. The fixed steel pipe 1 can be along the designated point of the precipitation well, and the downward pressure can be provided by external hydraulic equipment to press the fixed steel pipe 1 down along the designated point to the designated depth.

[0034] Among them, a reserved hanging hole 10 or a hanging ear is also opened on the top of the fixed steel pipe 1, which is used to provide a fulcrum for pulling out the fixed steel pipe 1 after using the precipitation well, thereby improving the convenience of use.

[0035] A pipe shoe 4 is provided at the bottom of the fixed steel pipe 1. The pipe shoe 4 is a conical pipe shoe 4. The tip of the conical pipe shoe 4 has a thinner diameter, which can easily penetrate the hard soil layer, thereby reducing construction resistance. The diameter of the conical pipe shoe 4 close to the fixed steel pipe 1 is larger than that of the fixed steel pipe 1, so that when drilling, the surrounding soil can become soft, which is convenient for subsequent water filtration and subsequent extraction.

[0036] Among them, a plurality of through holes for water inlet are opened on the fixed steel pipe, or a through hole for water inlet is set at the connection point between the pipe shoe 4 and the fixed steel pipe 1.

[0037] Among them, one end of the conical pipe shoe 4 connected to the fixed steel pipe 1 is provided with a truncated cone ring 41, which is convenient for pushing the soil to both sides when pulling out the fixed steel pipe 1, making it easier to pull it out.

[0038] The filter element 2 extends from the pipe mouth of the fixed steel pipe 1 to the bottom of the pipe. The filter element 2 can provide filtration from large particles such as sand, gravel, mud, etc. when the precipitation well is formed, which can prevent the pumping equipment such as the water pump 5 used in the precipitation well from being protected. The water pump 5 uses a submersible electric pump series with good anti-clogging performance to prevent large particles from damaging the water pump 5.

[0039] The filter material layer 3 is filled in the filter element 2, and the filter material layer 3 provides the first layer of filtration. The first layer of filtration can intercept larger particles, such as larger granular sand and mud. When they move toward the water pump 5 along the water flow, they are intercepted and filtered by the filter material layer 3. The filter material layer 3 can be formed by mixing crushed stone and melon stone, and then filtered for the second time by the filter element 2 to ensure stable water pumping of the pumping equipment.

[0040] The filling height of the filter material layer 3 can almost reach the uppermost water inlet hole to ensure stable filtration when water enters.

[0041] Specifically, a high-strength fixed steel pipe 1 is used to replace the traditional drilling tool, and it is directly implanted into the ground on the basis of the original ground structure by means of external pressure, forming a stable and reliable precipitation well main structure, so that the precipitation well is formed in one step, realizing a new precipitation well construction mode that is fast, convenient, economical and efficient. On this basis, the corresponding water pump 5 system and filter element 2 and filter material layer 3 are configured to establish an effective groundwater drainage channel in the shortest time, ensure the stable and safe operation of the pumping equipment, reduce damage, and at the same time, the fixed steel pipe 1 can be taken out for use next time. This recycling method can reduce consumables and can be reused.

[0042] The filter element 2 can be arranged 1-2 m away from the pipe boot 4, that is, the length of the filter element 2 can be 1-2 m, which can save consumables.

[0043] Among them, the pumping equipment can be located inside the filter element 2, so that the filter element 2 can protect the pumping equipment. The pumping equipment can also be located above the filter element 2, and above the topmost water inlet hole, so that after the water enters the water inlet hole, it can first be filtered by the filter material layer 3 and the filter element 2, and then contact the pumping equipment.

[0044] On the other hand, the length of the filter element 2 can also be the same as that of the fixed steel pipe 1, or slightly shorter than the fixed steel pipe 1, which can obtain a more stable support effect and filtering effect, and improve the rigid support and bending resistance of the fixed steel pipe 1.

[0045] For further reference, Figure 2 As shown, the filter element 2 is an annular filter structure, which can be extended and installed in conformity with the inner wall of the fixed steel pipe 1.

[0046] The filter element 2 includes a vertical fixing portion 21, an annular fastening portion 22 and a filter mesh 23; the vertical fixing portion 21 can be made of vertical steel bars, and several vertical fixing portions 21 form a supporting member of an annular filtering structure that matches the inner diameter of the fixed steel pipe 1, providing support and bearing functions. The number of vertical fixing portions 21 is determined according to the inner diameter of the fixed steel pipe 1, and the specific number is not limited here.

[0047] The filter screen 23 is preferably a wire mesh or a dense (2000) safety net.

[0048] Several annular fastening parts 22 are fixedly connected to the vertical fixing part 21, and each annular fastening part 22 is arranged in a group at a preset distance. The preset distance needs to be determined according to the depth of the fixed steel pipe 1 inserted into the ground. The annular fastening part 22 and the vertical fixing part 21 can be fixedly connected by mutual steel wire tying or welding. After connection, an annular steel cage is formed to provide support, compression and tension resistance.

[0049] The filter screen 23 is laid on the vertical fixing part 21 and the annular fastening part 22 to form a complete annular filtering structure. The filter screen 23 covers the gaps of the steel cage, making the diameter smaller than the mesh of the filter screen 23, so that large particles such as sand, gravel, and mud cannot pass through the filter screen 23, reducing the situation of sand and gravel mixing into the filter screen 23, ensuring the safety of the pumping equipment in the filter screen 23. The filter screen 23 can be made of stainless steel woven mesh to ensure reliability and stability for long-term use.

[0050] The filter material layer 3 can also help to keep the filter screen 23 close to the vertical fixing portion 21 .

[0051] Specifically, a plurality of vertical fixing parts 21 provide support for fitting and fixing the inner wall of the steel pipe 1, and a plurality of annular fastening parts 22 connect the plurality of vertical fixing parts 21 to each other to form a steel cage, thereby ensuring the stability of the overall annular filter frame. The filter mesh 23 provides gaps and intervals covering the steel cage, so that large particles cannot pass through the filter mesh 23, thereby ensuring the safety of the pumping equipment in the filter mesh 23.

[0052] Among them, the steel cage can be the same length as the fixed steel pipe 1 or slightly shorter than the fixed steel pipe 1, and the filter screen 23 can be arranged 1-2m away from the pipe boot 4, which can save consumables while providing support effect inside the fixed steel pipe 1. If there is surplus material, the steel cage can also be completely covered and wrapped. Only part of it is shown in the figure, not all of it.

[0053] For further reference, Figure 3 As shown, the vertical fixing portion 21 is bent near one end of the pipe boot 4 to form a sealing structure 211. The sealing structure 211 covers the filter screen 23. The filter material layer 3 is located in the sealing structure 211. The filter material layer 3 is fixed in the filter element 2 through the sealing structure 211, so that the filter material layer 3 can be moved synchronously with the filter element 2 to the bottom of the fixed steel pipe 1. The filter element 2 can also be placed first, and then the filter material layer 3 can be filled. The filter screen 23 wraps the filter material evenly to prevent the filter material from dispersing, making the gap between the filter materials smaller and the connection tighter, and also ensuring that the filter material layer 3 will not block the through hole for water inlet.

[0054] At the same time, the filter screen 23 can also filter some particles or mortar first, reducing the direct contact of particles or mortar with the filter material layer 3, so that the water contacted by the filter material layer 3 is finer and the mixed particles are less.

[0055] Furthermore, the annular fastening portion 22 is tied along the inner wall of the supporting member formed by several vertical fixing portions 21, and the annular fastening portion 22 is located outside the vertical fixing portion 21, so that the inward compressive resistance of the entire steel cage is enhanced. When the steel cage is subjected to inward pressure, such as the pressure of mud or water pressure squeezing inward, the vertical fixing portion 21 is forced to bend inward, and is hindered by the annular fastening portion and cannot bend, thereby improving the compressive resistance. This method can mainly prevent the external pressure from being too large, which will cause the entire steel cage to be flattened, improve the compressive resistance, and reduce the deformation of the steel cage.

[0056] Furthermore, the annular fastening portion 22 is a spiral hoop or annular hoop. The annular hoop can provide a stable clamping ability and compressive and bending resistance, thereby improving the overall stability of the steel cage and is suitable for use in relatively hard strata. The use of spiral hoop reduces material consumption and uses a spiral method to connect several vertical fixing portions 21 into one. In comparison, its compressive resistance is not as good as that of the annular hoop, so it is suitable for use in relatively soft strata.

[0057] In some embodiments, reference Figure 4 As shown, the filter screen 23 is provided with at least two layers. The more layers of the filter screen 23 are provided, the better the filtering effect and the supporting effect are. For example, when the filter material layer 3 is located on the filter screen 23, the multi-layer filter screen 23 ensures that the filter material will not crush the filter screen 23, thereby improving the supporting effect. The multi-layer filter screen 23 can also improve the filtering effect.

[0058] The installation positions of the at least two layers of filter screens 23 can be both set inside the steel cage or both set outside the steel cage, depending on the needs.

[0059] Furthermore, at least one layer of filter mesh 23 is provided on the side close to the inner wall of the fixed steel pipe 1. The filter mesh 23 close to the side of the fixed steel pipe 1 can provide an external pressure resistance effect, such as deformation and water pressure influence on one side of the fixed steel pipe 1, while ensuring the preliminary filtration of external water or mud. At least one layer of filter mesh 23 is provided on the side close to the annular fastening portion 22, that is, the filter mesh 23 located in the steel cage away from the fixed steel pipe 1. The filtration at this position mainly provides support and filtration for the filter material layer 3. Even if the filter material layer 3 is too heavy or there are sharp stones, and the filter mesh 23 of this layer is crushed, it will not affect the filtering effect of the filter mesh 23 close to the side of the fixed steel pipe 1.

[0060] In some embodiments, reference Figure 5 and Figure 6As shown, a plurality of fixing protrusions 11 are provided along the annular tube wall inside the fixed steel pipe 1, and disconnection ports 111 are provided on the fixing protrusions 11 at fixed intervals. A limiting ring 24 is provided on the outside of the filter element 2 at fixed intervals. An inner groove 241 is provided on the outer wall of the limiting ring 24. The number of the inner grooves 241 is consistent with the number of the fixing protrusions 11, and the inner grooves 241 fit with the fixing protrusions 11, and the fixing protrusions 11 can be embedded in the inner grooves 241; a support ring 12 is provided at one end of the fixing protrusion 11 close to the pipe boot 4, and the support ring 12 abuts against the limiting ring 24.

[0061] The fixing protrusion 11 and the limiting ring 24 are used to limit the movement trajectory of the filter element 2, so that the filter element 2 can be stably moved into the fixed steel pipe 1. At the same time, each fixing protrusion 11 and the support ring 12 can provide partial support for the filter element 2. The filter element 2 can be supported at every fixed distance, ensuring the stable installation of the filter element 2.

[0062] The limiting ring 24 can further provide stability for the steel cage, and cooperate with the annular fastening portion to tighten the steel cage from both the inside and outside.

[0063] When the filter element 2 is put into the fixed steel pipe 1, the inner groove 241 of the limiting ring 24 is aligned with the fixing protrusion 11. As the filter element 2 continues to enter the fixed steel pipe 1, multiple limiting rings 24 move along the fixing protrusion 11. When the limiting ring 24 at the end abuts the support ring 12, each limiting ring 24 is located at the disconnection port 111 of the fixing protrusion 11. At this time, the filter element 2 is rotated, and the entire filter element 2 and the limiting ring 24 rotate accordingly, so that the inner groove 241 on the limiting ring 24 is staggered from the disconnection port 111. After the inner groove 241 is staggered, the limiting ring 24 cannot move along the fixing protrusion 11, so that the limiting ring 24 abuts on the fixing protrusion 11. The limiting ring 24 can abut against the fixing protrusion 11 through the abutment of the limiting ring 24 with the fixing protrusion 11 and the abutment with the support ring 12, so that the filter element 2 as a whole can obtain a partial support effect at each fixed distance, so that the overall installation of the filter element 2 is more stable and the filter element 2 is reduced.

[0064] Among them, a limiting ring 24 is provided at one end of the filter element 2 away from the pipe boot 4. The user on the ground can more intuitively observe the position between the inner groove 241 on the limiting ring 24 and the disconnection port 111 of the fixing protrusion 11, thereby facilitating the adjustment of the position of the limiting ring 24 and the fixing protrusion 11.

[0065] Furthermore, a turning handle 25 is provided at one end of the filter element 2 away from the tube shoe 4 , and the turning handle 25 can be used to conveniently rotate the filter element 2 as a whole along the disconnection opening 111 .

[0066] When the filter element 2 is 1-2 m long, the vertical fixing portion 21 of the handle 25 is extended to the mouth of the fixed steel pipe so that the handle 25 can be grasped and rotated by a worker.

[0067] Specifically, the filter element 2 can be conveniently rotated using the turning handle 25. During the rotation, the filter element 2 can adjust the position of the filter layer 3 and the filter screen 23. For example, when there is too much mud or too much sand and gravel, the filter element 2 can be rotated using the turning handle 25 to rotate the filter layer 3 and the filter screen 23 along the water flow. During the rotation, the rotating water flow is used to flush the filter element 2 and the filter layer 3, so that the mud or sand and gravel that are blocked or attached to the filter screen 23 or the filter layer 3 fall off, thereby improving the filtering effect.

[0068] Among them, if the mud or sand and gravel that clogs or adheres to the filter screen 23 or the filter material layer 3 is relatively stubborn, the inner groove 241 of the limiting ring 24 can be rotated to the position of the fixed protrusion 11 by turning the handle 25, so that the limiting ring 24 can move up and down along the fixed protrusion 11 through the inner groove 241, and then the filter element 2 can be shaken or swung up and down to provide a vibration effect, thereby further removing the attached mud or stubborn stones.

[0069] Among them, an inclined surface is provided at the breaking opening 111, and the inclined surface can prevent sand and gravel from falling at the breaking opening 111. The sand and gravel can roll and fall along the inclined surface, thereby preventing the limiting ring 24 from being stuck.

[0070] The present application also provides a construction method for a one-step forming precipitation well, comprising the following steps: Measure and mark the exact location where the precipitation well is required.

[0071] The well positions are measured and placed according to the well location plan diagram. If obstacles (such as pile positions, etc.) are encountered during on-site construction or if the construction conditions affect the site, appropriate adjustments can be made on-site.

[0072] Arrange the downward pressure device or pressure-bearing device and align it with the target point.

[0073] Among them, a pressure-bearing device can also be used, such as a hook machine directly pressing down to achieve pressure-bearing operation.

[0074] The platform of the downward pressure device should be installed firmly and horizontally, with the hydraulic end aligned with the center of the fixed steel pipe 1.

[0075] Adjust the thrust, start the downward pressure device to push the fixed steel pipe 1 underground, and slowly push the fixed steel pipe 1 to make it sink steadily.

[0076] Among them, when pushing the fixed steel pipe 1, a pipe cover 13 can be set on the top of the fixed steel pipe 1. The pipe cover 13 can be a thickened steel plate. The pipe cover 13 is used to increase the hydraulic area of ​​the top of the fixed steel pipe 1 to avoid the top of the fixed steel pipe 1 being damaged by the hydraulic pressure. The thickness of the pipe cover 13 can be about 15 mm.

[0077] The pipe cover 13 may be provided with a hinge or a lock to be fixed on the top of the fixed steel pipe 1 to ensure stability.

[0078] The thrust is adjusted according to the depth. The thrust can be increased gradually from small to large. The deeper the depth, the greater the thrust required. The thrust and the pipe shoe 4 are used to enable the fixed steel pipe 1 to descend smoothly.

[0079] Monitor the settlement progress and stop the machine immediately when it reaches the designated depth. The fixed steel pipe 1 is inserted into the ground to form a preliminary structural frame.

[0080] The depth of the fixed steel pipe 1 can be determined by marking the surface of the fixed steel pipe 1 in advance. When the mark on the fixed steel pipe 1 is reached, the specified depth is reached, wherein the mark can be a reserved portion of the length.

[0081] Among them, the filter element 2 in the fixed steel pipe 1 can be pre-installed or installed after the preliminary structural frame is formed, depending on the on-site needs. During pre-installation, before the downward pressure device is started, the filter element 2 is inserted into the fixed steel pipe 1 along the pipe wall, and then the fixed steel pipe 1 is pressed down by the downward pressure device. If it is installed after the preliminary structural frame is formed, the filter element 2 is inserted into the fixed steel pipe 1 after the fixed steel pipe 1 is inserted into the ground.

[0082] Among them, if the filter element 2 is provided with a limiting ring 24 and a fixing protrusion 11 is provided in the fixed steel pipe 1, the inner groove 241 on the limiting ring 24 is connected with the fixing protrusion 11, and then moved along the fixing protrusion 11. If necessary, the limiting ring 24 can be rotated by turning the handle 25 to stagger the inner groove 241 with the disconnection port 111 to fix the position of the filter element 2.

[0083] Place the pre-prepared water pump 5 inside the fixed steel pipe 1, make electrical connections, and connect the power line.

[0084] The water pump 5 is turned on to start the pumping operation. The water pump 5 is connected to a pumping pipe, and the water at the bottom of the fixed steel pipe 1 is pumped and discharged by the water pump 5 .

[0085] Due to the presence of the filter element 2 and the filter material layer 3, larger particles can be effectively prevented from entering the pipeline and causing blockage.

[0086] After use, when the precipitation well is no longer needed, the water pump 5 is taken out from the fixed steel pipe 1 and connected to an external lifting device using the reserved hanging hole 10, and the fixed steel pipe 1 can be pulled out.

[0087] Furthermore, an auxiliary support frame is added at the wellhead of the precipitation well to improve the rigidity and balance of the overall system.

[0088] The support frame adopts a telescopic design and the height can be adjusted according to actual needs to ensure stability under any geological conditions.

[0089] The auxiliary support frame can be a ring-shaped support frame for the fixed steel pipe, so that the fixed steel pipe remains vertical during the construction process, and after the construction is completed, it is erected at the mouth of the precipitation well, which can improve the rigidity and balance of the overall precipitation well.

[0090] During the downward pressing process of the fixed steel pipe 1, the support frame and the downward pressing device work together to act on the steel pipe, thereby ensuring its verticality and stability.

[0091] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A one-time formed precipitation well, characterized in that: It comprises a fixed steel pipe (1), a filter element (2) and a filter material layer (3); a pipe boot (4) is provided at the bottom of the fixed steel pipe (1); the filter element (2) extends from the pipe mouth of the fixed steel pipe (1) to the bottom of the pipe; the filter material layer (3) is filled in the filter element (2); the fixed steel pipe (1) is pressed from the ground to the underground to form a precipitation well.

2. The one-step forming precipitation well according to claim 1 is characterized in that: The filter element (2) is an annular filter structure, comprising a vertical fixing portion (21), an annular fastening portion (22) and a filter screen (23); a plurality of the vertical fixing portions (21) are fitted to the inner diameter of the fixed steel pipe (1) and form a support member of the annular filter structure; a plurality of the annular fastening portions (22) are fixedly connected to the vertical fixing portion (21), and each of the annular fastening portions (22) is arranged in a group at a preset distance to form an annular steel cage; the filter screen (23) is laid on the vertical fixing portion (21) and the annular fastening portion (22) to form a complete annular filter structure.

3. The one-step formed precipitation well according to claim 2 is characterized in that: The vertical fixing portion (21) is bent near one end of the pipe boot (4) to form a sealing structure (211), the sealing structure (211) covers the filter screen (23), and the filter material layer (3) is located inside the sealing structure (211).

4. A one-step formed precipitation well according to claim 2 or 3, characterized in that: The annular fastening portion (22) is bound along the inner wall of the supporting member formed by the plurality of vertical fixing portions (21).

5. The one-step formed precipitation well according to claim 4 is characterized in that: The annular fastening portion (22) is a spiral stirrup or annular stirrup.

6. A one-step formed precipitation well according to claim 2 or 3, characterized in that: The filter screen (23) is provided with at least two layers.

7. The one-step forming precipitation well according to claim 6 is characterized in that: At least one layer of the filter screen (23) is provided on a side close to the inner wall of the fixed steel pipe (1); and at least one layer of the filter screen (23) is provided on a side close to the annular fastening portion (22).

8. A construction method for a one-step forming precipitation well, characterized in that: The one-time formed precipitation well for constructing any one of claims 1 to 7 comprises the following steps: Measure and mark the exact locations needed for precipitation wells; Arrange the downward pressure device or the pressure bearing device and align it with the target point; Adjust the thrust force properly, start the downward pressure device to push the fixed steel pipe (1) underground, and slowly push the fixed steel pipe (1) to make it sink steadily; The settlement progress is monitored and the machine is stopped immediately when the designated depth is reached. The fixed steel pipe (1) is inserted into the ground to form a preliminary structural frame; The filter element (2) in the fixed steel pipe (1) can be pre-installed or installed after the preliminary structural frame is formed. In the pre-installation, before the pressing device is activated, the filter element (2) is inserted into the fixed steel pipe (1) along the pipe wall, and then the fixed steel pipe (1) is pressed down by the pressing device. If the filter element (2) is installed after the preliminary structural frame is formed, after the fixed steel pipe (1) is inserted into the ground, the filter element (2) is inserted into the fixed steel pipe (1); Place the prepared water pump (5) inside the fixed steel pipe (1), make electrical connections, and connect the power line; The water pump (5) is turned on to start the pumping operation. Due to the presence of the filter element (2) and the filter material layer (3), large particles can be effectively prevented from entering the interior of the pipeline and causing blockage.

9. The construction method of a one-step forming precipitation well according to claim 8, characterized in that: An auxiliary support frame is added at the mouth of the precipitation well.

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