A working well foundation pit excavation and dewatering well downhole pipe device

Abstract

This application belongs to the field of groundwater level control technology for foundation pits and provides a device for lowering a dewatering well pipe during the excavation of a working well foundation pit. The device includes: a bracket placed at the edge of the well hole; the bracket includes a pair of horizontal rods and a pair of vertical rods; the two horizontal rods are parallel and spaced apart, with their ends on the same side not flush; the two vertical rods are parallel and spaced apart between the two horizontal rods to form a lowering hole, which corresponds directly to the well hole; the two horizontal rods are connected as one unit by the vertical rods; a calibration frame is centrally suspended in the lowering hole, supported by the bracket; the calibration frame has a calibration channel in the center adapted to the well pipe for the well pipe to pass through. This application has a simple structure, is easy to assemble, and is lightweight, allowing workers to quickly move its position. Furthermore, this application ensures that the well pipe will not scrape against the surrounding soil or well wall during lowering, ensuring stable lowering of the well pipe and not affecting the construction progress.

Description

Technical Field

[0001] This application relates to the field of groundwater level control technology for foundation pits, and in particular to a pipe installation device for dewatering wells during the excavation of working well foundation pits. Background Technology

[0002] Currently, subway and building construction requires excavation of foundation pits to limit groundwater to 0.5m below the construction surface. This is necessary to control groundwater at a reasonable level and prevent flooding. Consequently, dewatering wells need to be installed in the foundation pit to specifically treat groundwater. By installing dewatering wells, it is easier for workers to rationally pump out groundwater, avoiding excessive discharge. Furthermore, the fixed-point discharge method through dewatering wells allows for the rational utilization of pumped groundwater, achieving the effect of saving water resources.

[0003] Dewatering wells vary in depth, depending on the required precipitation levels. Some deep wells can even reach 50 to 60 meters. Types of dewatering wells include lightweight wellpoints, tubular wells, and vacuum wellpoints. Tubular wells have smaller diameters and greater depths, and are used to extract water from deep or shallow groundwater. Tubular wells drilled into confined aquifers, where the water head is above ground level, are also called gravity wells. Tubular wells are vertically installed tubular structures for extracting or protecting groundwater.

[0004] Currently, the initial construction of dewatering wells requires drilling. After successful drilling, concrete pipes need to be lowered into the hole to form the well wall. Each section of the concrete pipe is 0.8-1m long and requires manual intervention. The traditional method is to use a drilling rig winch to lift the frame and place the concrete pipe into the well. This method is relatively complicated, and the movement and construction of the lifting frame are cumbersome. Furthermore, this method can easily scrape the surrounding soil and the well wall during the process of lowering the concrete pipe into the well, reducing the lowering speed of the concrete pipe, slowing down the construction progress, and may even damage the surrounding soil structure, affecting the stability of the dewatering well structure.

[0005] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0006] The purpose of this application is to provide a device for lowering pipes into wells for excavating and dewatering foundation pits, so as to solve or alleviate the problem that the traditional method of lowering pipes into well holes using a drilling rig winch lifting frame is cumbersome and prone to causing the pipe to scrape against the surrounding soil and well walls.

[0007] To achieve the above objectives, this application provides the following technical solution: This application provides a device for installing a dewatering manhole casing during well excavation, comprising: a bracket placed at the edge of the well hole; the bracket including a pair of horizontal rods and a pair of vertical rods; the two horizontal rods being arranged parallel and spaced apart, with their ends on the same side not aligned; the two vertical rods being arranged parallel and spaced apart between the two horizontal rods to form a lowering hole, the lowering hole corresponding to the well hole; the two horizontal rods being connected as a whole by the vertical rods; a calibration frame centrally suspended in the lowering hole, supported by the bracket; the calibration frame having a calibration channel in the center adapted to the well casing for the well casing to pass through; one end of a lowering rope being wound around the protruding end of one of the horizontal rods and tightened; the other end passing through the lowering hole and winding around to the bottom of the calibration frame, then wound around the protruding end of the other horizontal rod and tightened; when the well casing is in the calibration channel, gravity is applied to the lowering rope; releasing both ends of the lowering rope allows the well casing to gradually move downwards towards the center of the well hole.

[0008] Preferably, the tops of the transverse bar and the longitudinal bar are flush.

[0009] Preferably, a pad is provided at the joint between the transverse bar and the longitudinal bar, and the bracket is raised by the pad.

[0010] Preferably, the lowering hole is a square hole.

[0011] Preferably, an isolation post is erected at the top of the more protruding end of each of the two transverse bars, and multiple isolation posts are distributed at intervals along the axial direction of the transverse bars; The lowering rope, wrapped around the outside of the transverse bar, is misaligned by multiple isolation posts.

[0012] Preferably, the calibration frame includes: a support ring frame, a curved rod, and a support plate, wherein a positioning post protrudes downward from the bottom of the support ring frame corresponding to the transverse rod and the longitudinal rod; Both the transverse rod and the longitudinal rod have positioning holes at the top center for the positioning pin to be inserted.

[0013] Preferably, the curved rod is erected in the lowering hole, and multiple curved rods are arranged around the support ring frame, so that the curved rods contact the corresponding horizontal rods or vertical rods.

[0014] Preferably, the lower end of the curved rod extends vertically downward, and the upper end of the curved rod extends along the outer side of the transverse rod or the longitudinal rod and connects with the inner side of the support ring frame.

[0015] Preferably, the tray is located within the alignment channel, and the lower end of the curved rod passes through the tray.

[0016] Preferably, a limiting groove is provided at the center of the lower plate surface of the pallet along the extension direction of the lowering rope, so that the lowering rope passes through the limiting groove.

[0017] Compared with the closest prior art, the technical solution of this application has the following beneficial effects: This application has a simple structure, is easy to assemble, and is lightweight, making it easy for workers to quickly move its position. At the same time, this application can also ensure that the well pipe will not scrape against the surrounding soil and borehole walls during the lowering process, ensuring that the well pipe is lowered stably without affecting the construction progress and ensuring the stability of the dewatering well structure. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein: Figure 1 This is a schematic diagram of the front view of this application; Figure 2 This is a schematic diagram of the overall structure of this application; Figure 3 This is a schematic diagram of the overall bracket structure of this application; Figure 4 This is a schematic diagram of the overall structure of the calibration frame in this application.

[0019] In the diagram: 1. Horizontal bar; 2. Longitudinal bar; 3. Lowering hole; 4. Lowering rope; 5. Pad block; 6. Isolation post; 7. Hanging support ring frame; 8. Curved bar; 9. Support plate; 10. Positioning post; 11. Positioning hole; 12. Limiting groove. Detailed Implementation

[0020] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0021] In the following description, the terms "first / second / third" are used merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit this disclosure.

[0023] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] Example 1: This example aims to provide a working well foundation pit excavation dewatering well downhole pipe device. Its main functions are simple structure, easy assembly, easy rapid displacement, and the ability to ensure that the well pipe is always in the center of the well hole and does not contact the surrounding soil wall during the lowering process.

[0025] Reference Figures 1-3 The system includes a bracket, a calibration frame, and a lowering rope 4. The bracket is placed at the edge of the well hole. The bracket includes a pair of horizontal rods 1 and a pair of vertical rods 2. Both horizontal rods 1 and vertical rods 2 are cylindrical. The two horizontal rods 1 are arranged in parallel and spaced apart, and the ends of the two horizontal rods 1 on the same side are not flush to allow the lowering rope 4 to be wound. The two vertical rods 2 are welded in parallel and spaced apart between the two horizontal rods 1 to form a square lowering hole 3. The tops of the horizontal rods 1 and the vertical rods 2 are flush. The lowering hole 3 corresponds to the well hole. The two horizontal rods 1 are connected into one piece by the two vertical rods 2. The joints of the horizontal rods 1 and the vertical rods 2 are welded with tubular pads 5. The pads 5 raise the bracket and facilitate the winding of the lowering rope 4.

[0026] Reference Figures 2-4The calibration frame is centrally suspended in the lowering hole 3. The calibration frame is supported by a bracket. The center of the calibration frame has a calibration channel adapted to the well pipe for the well pipe to pass through. Specifically, the calibration frame includes: a support ring frame 7, a curved rod 8, and a support plate 9. At the bottom of the support ring frame 7, four positioning posts 10 protrude downwards corresponding to the horizontal rod 1 and the longitudinal rod 2. The top center of the horizontal rod 1 and the longitudinal rod 2 are provided with positioning holes 11 for the positioning posts 10 to be inserted, thereby stabilizing the position of the support ring frame 7. The curved rod 8 is erected in the lowering hole 3, and four curved rods 8 are arranged around the support ring frame 7, so that the curved rod 8 contacts the corresponding horizontal rod 1 or longitudinal rod 2. That is, the lower end of the curved rod 8 extends vertically downwards, and the upper end of the curved rod 8 extends along the arc along the outer side of the horizontal rod 1 or the longitudinal rod 2, and the upper end of the curved rod 8 is welded to the inner side of the support ring frame 7.

[0027] The pallet 9 is located in the alignment channel, and the lower ends of the four curved rods 8 pass through the pallet 9 at the same time to prevent the pallet 9 from tipping over when it is stationary. A limiting groove 12 is opened in the center of the lower plate surface of the pallet 9 along the diagonal direction of the lowering hole 3 so that the lowering rope 4 can pass through the limiting groove 12 and the position of the lowering rope 4 can be fixed by the limiting groove 12.

[0028] The lowering rope 4 is a steel wire rope. One end of the lowering rope 4 is wrapped around the protruding end of one of the transverse rods 1 and tightened by the worker's hand. The other end first passes down through the lowering hole 3 and wraps around the limiting groove 12 below the support plate 9. Then it passes up through the lowering hole 3 and wraps around the protruding end of another transverse rod 1 and tightened by the worker's hand. At this time, the support plate 9 will not fall due to the support of the lowering rope 4. The lowering rope 4 is wrapped around the outside of the transverse rod 1, which can greatly increase the friction between the lowering rope 4 and the transverse rod 1. With the addition of manual pulling, it can fully support the weight of the well pipe. Furthermore, as the number of times the lowering rope 4 is wrapped around the transverse rod 1 increases, the friction will also increase to overcome the weight of more well pipes.

[0029] In actual use, the worker places the first section of the well pipe vertically in the alignment channel, which is matched to the diameter of the well pipe. The bottom of the well pipe is fully supported by the support plate 9, and the weight of the well pipe is applied to the lowering rope 4. At this time, releasing the two ends of the lowering rope 4 allows the well pipe to gradually move down toward the center of the well hole. After reaching a certain depth, the second section of the well pipe is connected to the upper end of the first section of the well pipe, and so on. As the number of well pipe sections increases, the number of turns of the lowering rope 4 on the horizontal rod 1 can be increased. Usually, the pipe opening is equipped with a matching socket or protrusion to prevent misalignment between well pipes. Therefore, as long as the uppermost well pipe is kept in the center of the well hole, there will be no scraping of the surrounding soil wall during the lowering of the well pipe.

[0030] The dewatering well pipe-laying device provided in this embodiment has a simple overall structure, is easy to assemble, and is lightweight, making it convenient for workers to quickly move its position. At the same time, this device can also ensure that the well pipe will not scrape against the surrounding soil and borehole walls during the lowering process, ensuring that the well pipe is lowered stably and does not affect the construction progress, thus ensuring the stability of the dewatering well structure.

[0031] Example 2 aims to ensure the worker's flexibility in tightening and releasing the lower rope 4, preventing the lower rope wrapped around the outside of the transverse bar 1 from overlapping, thus avoiding instability of the lower rope 4. Specifically, refer to Figure [Figure Number Missing]. Figure 3 and Figure 4 Each of the two transverse bars 1 has an isolation post 6 erected at the top of its more prominent end. Four or more isolation posts 6 are distributed at intervals along the axial direction of the transverse bars 1. The isolation posts 6 are used to offset each turn of the lowering rope 4 wrapped around the outside of the transverse bars 1, ensuring that each turn of the lowering rope 4 contacts the outer wall of the transverse bars 1 to generate friction.

[0032] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for installing a dewatering pipe during the excavation of a working well foundation pit, characterized in that, include: A bracket is placed at the edge of the well hole. The bracket includes a pair of horizontal rods and a pair of vertical rods. The two horizontal rods are arranged in parallel and spaced apart, and the ends of the two horizontal rods on the same side are not flush. The two vertical rods are arranged in parallel and spaced apart between the two horizontal rods to form a lowering hole. The lowering hole corresponds to the well hole. The two horizontal rods are connected into one piece by the vertical rods. The calibration frame is centrally suspended in the lowering hole. The calibration frame is supported by the bracket. The center of the calibration frame is provided with a calibration channel adapted to the well pipe for the well pipe to pass through. The lowering rope has one end wrapped around the protruding end of one of the transverse rods and tightened, and the other end passes through the lowering hole and wraps around to the bottom of the calibration frame, and then wraps around the protruding end of the other transverse rod and tightens. When the well casing is within the positioning channel, gravity is applied to the lowering rope. Releasing both ends of the lowering rope allows the well casing to gradually move downwards toward the center of the wellbore.

2. The well foundation pit excavation and dewatering well downhole pipe device according to claim 1, characterized in that, The tops of the transverse bar and the longitudinal bar are flush.

3. The well foundation pit excavation and dewatering well downpipe device according to claim 1, characterized in that, A pad is provided at the joint between the transverse bar and the longitudinal bar, and the bracket is raised by the pad.

4. The well foundation pit excavation and dewatering well downpipe device according to claim 1, characterized in that, The lowering hole is a square hole.

5. The well foundation pit excavation and dewatering well downpipe device according to claim 1, characterized in that, Each of the two transverse bars has an isolation post erected at the top of its more protruding end, and multiple isolation posts are distributed at intervals along the axial direction of the transverse bars; The lowering rope, wrapped around the outside of the transverse bar, is misaligned by multiple isolation posts.

6. The well foundation pit excavation and dewatering well downpipe device according to claim 1, characterized in that, The calibration frame includes: a support ring frame, a curved rod, and a support plate. The bottom of the support ring frame has a positioning post protruding downwards corresponding to the horizontal and vertical rods. Both the transverse rod and the longitudinal rod have positioning holes at the top center for the positioning pin to be inserted.

7. The well foundation pit excavation and dewatering well downpipe device according to claim 6, characterized in that, The curved rod is erected in the lowering hole, and multiple curved rods are arranged around the support ring frame, so that the curved rods contact the corresponding horizontal rods or the longitudinal rods.

8. The well foundation pit excavation and dewatering well downpipe device according to claim 7, characterized in that, The lower end of the curved rod extends vertically downward, and the upper end of the curved rod extends along the outer side of the transverse rod or the longitudinal rod and connects with the inner side of the support ring frame.

9. The well foundation pit excavation and dewatering well downpipe device according to claim 8, characterized in that, The tray is located within the alignment channel, and the lower end of the curved rod passes through the tray.

10. The well foundation pit excavation and dewatering well downpipe device according to claim 9, characterized in that, A limiting groove is provided in the center of the lower plate surface along the extension direction of the lowering rope, so that the lowering rope passes through the limiting groove.

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