A well wall structure for ground freezing pipe anchoring

Abstract

The present invention relates to the technical field of freezing inclined wells, and in particular to a well wall structure for anchoring stratum freezing pipes, comprising a stratum, wherein at least two freezing pipes are fixedly installed on the top of the stratum, and the side ends of the plurality of freezing pipes are all provided with the same protective plate. The present invention applies a pulling force to the top of the connecting plate by allowing the T-shaped pressing plate, and at the same time, the connecting plate drives the fixed shaft to rotate inside the T-shaped pressing plate, and after the connecting plate itself is deflected, the connecting plate is adjusted to a horizontal state, and the side ends of the connecting plate are tightly attached to the inner side of the fixed frame, and the two support plates are quickly fixed. Then, the freezing pipe is fixed through the support plate by clamping the first and second splints, and the resected part is fixed by using the first and second splints at the same time. After the cutting is completed, the resected part can also be temporarily fixed to prevent the upper section of the freezing pipe from tilting in the later stage of cutting, thereby affecting the cutting effect.

Description

Technical Field

[0001] The invention relates to the technical field of freezing inclined wells, in particular to a well wall structure for anchoring stratum freezing pipes. Background Art

[0002] Inclined shaft development is the preferred and primary method for deep coal mining in northwestern my country. The area between the surface and the stable bedrock is often covered with aeolian sand, Tertiary and Quaternary topsoil, and unstable strata such as weak and broken mudstone and sandstone. This requires artificial freezing to consolidate the excavation area into a bearing- and waterproof frozen wall. Excavation under the protection of this frozen wall presents the following drawbacks for inclined shaft freezing.

[0003] At present, freezing holes are generally vertical holes, and multi-row pipe freezing is generally adopted. After freezing is completed, the freezing pipes and the well wall do not form an integral structure. Later, when the well wall posture changes due to reasons such as formation deformation, the freezing pipes cannot play any role.

[0004] There is a lack of stabilization devices during the cutting process, especially at the end of the cutting construction, there is no support connection at the bottom, and the upper section is prone to tilting and collapsing, which poses certain safety hazards to construction safety. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a well wall structure for anchoring a stratum freezing pipe.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a well wall structure for anchoring stratum freezing pipes, comprising a stratum, at least two freezing pipes are fixedly installed on the top of the stratum, the side ends of the multiple freezing pipes are all provided with the same protective plate, the bottom end of each of the freezing pipes is fixedly installed with an arc-shaped steel plate, the interior of each of the freezing pipes is provided with a liquid supply pipe, and the circumferential surface of the multiple freezing pipes is provided with two support plates.

[0007] As a preferred technical solution of the present invention, a fixed frame is fixedly installed on the top of each support plate, a directional slide is slidably installed inside each fixed frame, at least two buffer pads are fixedly installed on the inner side of each support plate, the tops of the two directional slides are fixedly installed with the same first splint, and second splints are provided on the side ends of multiple freezing tubes located on the opposite sides of the first splint, and the first splint is connected to the second splint, and a telescopic rod is slidably installed on the side end of each directional slide, and two positioning plates are fixedly installed on the side end of each telescopic rod.

[0008] As a preferred technical solution of the present invention, a connecting frame is fixedly installed on the side end of each fixed frame, a T-shaped pressing plate is rotatably installed inside each connecting frame, a connecting plate is rotatably installed on the inner side of each T-shaped pressing plate, and a fixed shaft is fixedly installed on both side ends of each connecting plate, and each fixed shaft is connected to the T-shaped pressing plate.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] First, the annular space between the freezing pipe and the stratum is filled with cement slurry to prevent water in the stratum from conducting through the annular space in the later stage. During the excavation of the wellbore, when the freezing pipes within the excavation range are cut off, the freezing pipes at the bottom of the excavation surface are filled with cement slurry, and an arc-shaped steel plate is welded on the top; the freezing pipes at the top of the excavation surface are also welded with an arc-shaped steel plate that fits the shape of the well wall, and the outer and inner well walls are cast in turn. The outer wall can be supported by steel arch anchor spraying or reinforced concrete cast-in-place according to the stratum conditions. After the well wall construction is completed, the frozen pipes at the upper part of the excavation range are filled with cement slurry using a liquid supply pipe to limit and support the frozen well wall, which plays an anchoring role and ensures the long-term stability of the well wall.

[0011] Let the T-shaped pressing plate apply a pulling force to the top of the connecting plate, and at the same time, the connecting plate drives the fixed shaft to rotate inside the T-shaped pressing plate. After the connecting plate itself is deflected, adjust the connecting plate to a horizontal state, let the side end of the connecting plate close to the inner side of the fixed frame, quickly fix the two support plates, and then fix the freezing pipe through the support plate by clamping the first splint and the second splint. At the same time, use the first splint and the second splint to fix the cut-off part. After the cutting is completed, the cut-off part can also be temporarily fixed to prevent the upper part of the freezing pipe from tilting in the later stage of cutting, affecting the cutting effect.

[0012] By pulling one end of the connecting plate, place one end of the connecting plate on the side end of the other fixed frame, so that the end of the connecting plate fits into the block at the side end of the connecting plate, and by pressing the end of the T-shaped pressing plate, the T-shaped pressing plate is rotated on the inner side of the connecting frame, and the T-shaped pressing plate applies a pulling force to the top of the connecting plate. At the same time, the connecting plate drives the fixed shaft to rotate inside the T-shaped pressing plate, and after the connecting plate itself is deflected, the connecting plate is adjusted to a horizontal state, so that the side end of the connecting plate is close to the inner side of the fixed frame, and the two support plates are quickly fixed. Then, the freezing pipe is stabilized by clamping the first splint and the second splint. When cutting the freezing pipe, the freezing pipe is fixed by the support plate. The operation is simple and convenient for quick installation and fixation.

[0013] The fixed frame applies a horizontal extrusion to the telescopic rod, allowing the telescopic rod to slide to one side, allowing the telescopic rod to squeeze the top of the positioning plate, forcing the positioning plate to contract inside the directional skateboard, allowing the telescopic rod to slide into the inside of the directional skateboard, and the top of the telescopic rod is flush with the outside of the directional skateboard, which is convenient for sliding the directional skateboard. After stopping pulling the first clamping plate and the second clamping plate, the directional skateboard stops sliding inside the fixed frame. Under the force of the positioning plate, the positioning plate is reset inside the directional skateboard, and the positioning plate pushes the telescopic rod to slide outward, and the top of the telescopic rod is inserted into the interior of the fixed frame to fix the directional skateboard. When in use, the clamping position can be flexibly adjusted according to the cutting position without re-disassembly and fixation, which increases the convenience of use.

[0014] First, move the two support plates so that the side ends of the two support plates are aligned with multiple freezing pipes. By pushing the two support plates, the side ends of the two support plates are inserted into the side ends of the freezing pipes, and at the same time, the buffer pads are close to the surface of the freezing pipes. Then, by adjusting the positions of the two support plates, the two support plates drive the fixed frames to align with each other. By pulling one end of the connecting plate, place one end of the connecting plate on the side end of the other fixed frame, and let the end of the connecting plate fit into the block at the side end of the connecting plate, so as to reduce the extrusion force on the outside of the freezing pipe during the fixing process and prevent the freezing pipe from being deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the stratum of the present invention;

[0016] Figure 2 This is a schematic structural diagram of the freezing pipe of the present invention;

[0017] Figure 3 Schematic diagram of the structure of the curved steel plate of the present invention;

[0018] Figure 4 This is a schematic diagram of the freezing pipe construction of the present invention;

[0019] Figure 5 Schematic diagram of the outer wall construction of the present invention;

[0020] Figure 6 This is a schematic structural diagram of the liquid supply pipe of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the splint of the present invention;

[0022] Figure 8 It is a structural schematic diagram of the directional skateboard of the present invention.

[0023] Among them: 1. stratum; 11. freezing pipe; 12. protective plate; 13. curved steel plate; 14. liquid supply pipe; 15. first splint; 16. second splint; 17. connecting frame; 18. T-shaped pressing plate; 19. fixed shaft; 21. connecting plate; 22. support plate; 23. buffer pad; 24. fixed frame; 25. positioning plate; 26. telescopic rod; 27. directional slide. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purpose and efficacy of the present invention easy to understand, the present invention is further described below in conjunction with specific examples, but the following examples are only preferred embodiments of the present invention, not all. Based on the examples in the embodiments, other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention. The experimental methods in the following examples, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained from commercial channels.

[0025] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, a well wall structure for ground freezing pipe anchoring includes a ground layer 1, at least two freezing pipes 11 are fixedly installed on the top of the ground layer 1. During the wellbore excavation, when the freezing pipes 11 within the excavation range are cut off, the freezing pipes 11 at the bottom of the excavation surface are filled with cement slurry, and then a curved steel plate 13 is welded on the top. The freezing pipes 11 at the top of the excavation surface are also welded with a curved steel plate 13 that fits the shape of the well wall. The outer well wall and the inner well wall are cast in sequence. The outer wall can be made of steel arch anchor spraying according to the conditions of the ground layer 1. Support can also be achieved by cast-in-place reinforced concrete support. After the well wall construction is completed, the freezing pipe 11 at the upper part of the excavation range is filled with cement slurry using the liquid supply pipe 14 to limit and support the frozen well wall. The side ends of multiple freezing pipes 11 are all provided with the same protective plate 12, and the bottom end of each freezing pipe 11 is fixedly installed with an arc-shaped steel plate 13. A liquid supply pipe 14 is provided inside each freezing pipe 11, and two support plates 22 are provided on the circumferential surface of multiple freezing pipes 11.

[0026] The top of each support plate 22 is fixedly installed with a fixed frame 24, and a directional slide plate 27 is slidably installed inside each fixed frame 24. At least two buffer pads 23 are fixedly installed on the inner side of each support plate 22. The top of the two directional slide plates 27 is fixedly installed with the same first splint 15, and the side ends of multiple freezing tubes 11 on the opposite sides of the first splint 15 are provided with a second splint 16, and the first splint 15 is connected to the second splint 16. By pulling the first splint 15 and the second splint 16 upward, the directional slide plate 27 at the bottom is driven to slide upward, so that the directional slide plate 27 moves upward inside the fixed frame 24, and a horizontal extrusion is applied to the telescopic rod 26 through the fixed frame 24, so that the telescopic rod 26 slides to one side, and the telescopic rod 26 squeezes The top end of the positioning plate 25 is pressed, forcing the positioning plate 25 to retract inside the directional slide 27, allowing the telescopic rod 26 to slide into the inside of the directional slide 27. The top end of the telescopic rod 26 is flush with the outside of the directional slide 27, which is convenient for sliding the directional slide 27. After stopping pulling the first clamping plate 15 and the second clamping plate 16, the directional slide 27 stops sliding inside the fixed frame 24. Under the force of the positioning plate 25, the positioning plate 25 is reset inside the directional slide 27. The positioning plate 25 pushes the telescopic rod 26 to slide outward, and the top end of the telescopic rod 26 is inserted into the interior of the fixed frame 24 to fix the directional slide 27. The clamping position can be flexibly adjusted according to the cutting position during use. The side end of each directional slide 27 is slidably mounted with a telescopic rod 26.

[0027] Two positioning plates 25 are fixedly installed on the side ends of each telescopic rod 26, and a connecting frame 17 is fixedly installed on the side ends of each fixed frame 24. A T-shaped pressing plate 18 is rotatably installed inside each connecting frame 17. By pulling one end of the connecting plate 21, one end of the connecting plate 21 is placed on the side end of another fixed frame 24, so that the end of the connecting plate 21 fits with the block at the side end of the connecting plate 21. By pressing the end of the T-shaped pressing plate 18, the T-shaped pressing plate 18 is rotated on the inner side of the connecting frame 17, so that the T-shaped pressing plate 18 applies a pulling force to the top end of the connecting plate 21, and at the same time, the connecting plate 21 drives the fixed shaft 19 to move in the T The inside of the T-shaped pressing plate 18 is rotated to allow the connecting plate 21 to deflect itself, and then the connecting plate 21 is adjusted to a horizontal state, so that the side ends of the connecting plate 21 are close to the inner side of the fixed frame 24, and the two support plates 22 are quickly fixed. Then, the freezing pipe 11 is stabilized by clamping the first clamping plate 15 and the second clamping plate 16. When the freezing pipe 11 is cut, the freezing pipe 11 is fixed by the support plate 22. The inner side of each T-shaped pressing plate 18 is rotatably installed with a connecting plate 21, and the two side ends of each connecting plate 21 are fixedly installed with a fixed shaft 19, and each fixed shaft 19 is connected to the T-shaped pressing plate 18.

[0028] Working principle:

[0029] The first step is to fill the annular space between the freezing pipe 11 and the stratum 1 with cement slurry during the drilling of the freezing hole to prevent water in the stratum 1 from conducting through the annular space in the later stage. During the excavation of the wellbore, when the freezing pipe 11 within the excavation range is cut off, the freezing pipe 11 at the bottom of the excavation surface is filled with cement slurry, and an arc-shaped steel plate 13 is welded on its top. The freezing pipe 11 at the top of the excavation surface is also welded with an arc-shaped steel plate 13 that fits the shape of the well wall. The outer well wall and the inner well wall are cast in turn. The outer wall can be supported by steel arch anchor spraying or reinforced concrete cast-in-place according to the conditions of the stratum 1. After the well wall construction is completed, the freezing pipe 11 at the upper part of the excavation range is filled with cement slurry using the liquid supply pipe 14 to limit and support the frozen well wall, play an anchoring role, and ensure the long-term stability of the well wall.

[0030] The second step is to move the two support plates 22 during the process of cutting the freezing tube 11 so that the side ends of the two support plates 22 are aligned with the multiple freezing tubes 11, and the side ends of the two support plates 22 are inserted into the side ends of the freezing tube 11 by pushing the two support plates 22, while making the buffer pads 23 close to the surface of the freezing tube 11, and then adjust the positions of the two support plates 22 so that the two support plates 22 drive the fixed frames 24 to align with each other, and by pulling one end of the connecting plate 21, place one end of the connecting plate 21 on the side end of the other fixed frame 24, and make the end of the connecting plate 21 fit with the block at the side end of the connecting plate 21, and by pressing the end of the T-shaped pressing plate 18, make the T-shaped pressing plate 18 rotate on the inner side of the connecting frame 17, so that the T-shaped pressing plate 18 is aligned with the connecting frame 17. A pulling force is applied to the top of the connecting plate 21, and at the same time, the connecting plate 21 drives the fixed shaft 19 to rotate inside the T-shaped pressing plate 18. After the connecting plate 21 itself is deflected, the connecting plate 21 is adjusted to a horizontal state, so that the side end of the connecting plate 21 is close to the inner side of the fixed frame 24, and the two support plates 22 are quickly fixed. Then, the freezing pipe 11 is stabilized by clamping the first splint 15 and the second splint 16. When cutting the freezing pipe 11, the freezing pipe 11 is fixed by the support plate 22, and the first splint 15 and the second splint 16 are used to fix the cut part. After the cutting is completed, the cut part can also be temporarily fixed to prevent the upper part of the freezing pipe 11 from tilting in the later stage of cutting, affecting the cutting effect.

[0031] The top end of the telescopic rod 26 is inserted into the interior of the fixed frame 24, thereby fixing the directional slide 27. When in use, the clamping position can be flexibly adjusted according to the cutting position, without having to disassemble and fix it again, thereby increasing the convenience of use.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A well wall structure for anchoring a freezing pipe in a stratum, comprising a stratum (1), characterized in that: At least two freezing pipes (11) are fixedly installed on the top of the stratum (1), and the side ends of the plurality of freezing pipes (11) are all provided with the same protective plate (12). The bottom end of each freezing pipe (11) is fixedly installed with an arc-shaped steel plate (13), and the interior of each freezing pipe (11) is provided with a liquid supply pipe (14). The circumferential surface of the plurality of freezing pipes (11) is provided with two support plates (22); the top of each support plate (22) is fixedly installed with a fixed frame (24), the interior of each fixed frame (24) is slidably installed with a directional slide plate (27), and the inner side of each support plate (22) is fixedly installed with a fixed frame (24). At least two buffer pads (23); a telescopic rod (26) is slidably mounted on the side end of each directional slide plate (27); two positioning plates (25) are fixedly mounted on the side end of each telescopic rod (26); a connecting frame (17) is fixedly mounted on the side end of each fixed frame (24); a T-shaped pressing plate (18) is rotatably mounted inside each connecting frame (17); a connecting plate (21) is rotatably mounted on the inner side of each T-shaped pressing plate (18); a fixed shaft (19) is fixedly mounted on both side ends of each connecting plate (21), and each fixed shaft (19) is connected to the T-shaped pressing plate (18).

2. A well wall structure for anchoring a stratum freezing pipe according to claim 1, characterized in that: The top ends of the two directional slides (27) are fixedly mounted with a same first clamping plate (15).

3. A well wall structure for anchoring a stratum freezing pipe according to claim 2, characterized in that: A second clamping plate (16) is provided at the side ends of the plurality of freezing tubes (11) located on the opposite side of the first clamping plate (15), and the first clamping plate (15) is connected to the second clamping plate (16).

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