Soil body cutting protection device for manual pipe jacking

Abstract

The utility model discloses a soil body cutting protection device for a manual pipe jacking, which is characterized in that a fixing part is fixedly sleeved on a pipe jacking section for manual pipe jacking construction, and a protection part arranged along the axial direction is detachably connected with the front end of the fixing part, so that the protection part extends to the front end of the pipe jacking section; and if the protection part is damaged in the construction process, the protection part can be directly detached and replaced, it is ensured that the protection part reliably supports the soil body, and the risk of soil body collapse is reduced to the maximum extent. The cutting part is fixedly connected with the front end of the protection part, and the cutting part forms the front end cutting face which is obliquely arranged outwards from bottom to top in the axial direction, so that in the manual pipe jacking construction process, the soil body is rapidly cut through the cutting part, the construction efficiency is improved, and compared with the prior art, the soil body at the front end of the pipe jacking section can be prevented from collapsing; and meanwhile, the construction efficiency is improved, and safety and progress guarantee is provided for manual pipe jacking tunnel construction.

Description

Technical Field

[0001] The utility model relates to the technical field of underground pipeline construction equipment, and particularly to a soil cutting protection device for manual pipe jacking. Background Art

[0002] Manual pipe jacking construction is an underground pipeline construction method, which is usually used to cross obstacles such as railways, roads, rivers or buildings without excavating the ground surface. This method is carried out by setting working well pits at both ends of the pipeline and using jacking equipment and soil removal equipment in the working well pits. During the pipe jacking construction process, workers manually excavate soil at the front end of the pipeline, and as the excavation progresses, the pipeline is jacked into the soil section by section.

[0003] However, the diameter of the manual pipe jacking is relatively large, the soil at the front end of the pipe jacking is prone to collapse, and the manual pipe jacking is generally buried shallowly. When collapse occurs, it is easy to cause road surface settlement, posing a great potential safety hazard. Summary of the Utility Model

[0004] The utility model provides a soil cutting protection device for manual pipe jacking to solve the technical problem that the soil at the front end of the existing manual pipe jacking is prone to collapse and cause road surface settlement.

[0005] According to one aspect of the utility model, a soil cutting protection device for manual pipe jacking is provided, which includes a fixing part for fixedly sleeving on the pipe jacking pipe section, a protection part axially arranged and detachably connected to the front end of the fixing part for extending to the front end of the pipe jacking pipe section, and a cutting part fixedly connected to the front end of the protection part for cutting soil. The front cutting surface of the cutting part is arranged obliquely upward and axially outward from bottom to top.

[0006] As a further improvement of the above technical solution:

[0007] Further, the protection part includes an annular bearing plate axially arranged and fixedly connected to the cutting part, a convex arc-shaped bearing plate bent upward and arranged inside the annular bearing plate for supporting the upper end of the annular bearing plate, a concave arc-shaped bearing plate fixedly connected to the convex arc-shaped bearing plate and bent downward and arranged inside the annular bearing plate for supporting the lower end of the annular bearing plate, and a first connecting ring radially arranged and fixedly connected to the annular bearing plate, the convex arc-shaped bearing plate and the concave arc-shaped bearing plate respectively. The first connecting ring is detachably connected to the fixing part.

[0008] Further, reinforcing ribs are arranged between the annular bearing plate and the convex arc-shaped bearing plate; and / or reinforcing ribs are arranged between the annular bearing plate and the concave arc-shaped bearing plate.

[0009] Further, the fixing part includes a second connecting ring arranged radially and closely attached to the first connecting ring. A connecting window is provided at the connection between the protection part and the fixing part. The soil cutting protection device further includes a connecting structure axially penetrating through the first connecting ring and the second connecting ring and arranged corresponding to the connecting window for detachably connecting the fixing part and the protection part.

[0010] Further, the fixing part further includes an outer ring fixing plate fixedly connected to the second connecting ring for fixedly sleeving on the outer radial wall of the pipe jacking pipe joint, an inner ring fixing plate fixedly connected to the second connecting ring for fixedly sleeving on the inner radial wall of the pipe jacking pipe joint, and a support ring respectively fixedly connected to the outer ring fixing plate and the inner ring fixing plate for closely attaching to the axial front end face of the pipe jacking pipe joint.

[0011] Further, the first connecting ring is axially provided with a first connecting hole, and the second connecting ring is axially provided with a second connecting hole arranged corresponding to the first connecting hole. The connecting structure includes a connecting bolt axially penetrating through the first connecting hole and the second connecting hole and a locking nut for threadedly connecting with the protruding end of the connecting bolt.

[0012] Further, there are multiple first connecting holes, and the multiple first connecting holes are arranged at intervals along the circumferential direction of the first connecting ring. The first connecting ring, the second connecting ring, the connecting structure, and the connecting window are arranged in one-to-one correspondence.

[0013] Further, the radial thickness of the cutting part is 1 mm - 4 mm.

[0014] Further, the front end of the cutting part is arranged in a serrated shape.

[0015] Further, the inclination angle of the front cutting surface of the cutting part relative to the horizontal plane is less than 45° + φ / 2, where φ is the internal friction angle of the soil layer where the top cover pipe joint is located.

[0016] The utility model has the following beneficial effects:

[0017] The soil cutting and protection device for manual pipe jacking of the present utility model fixes the fixing part on the pipe jacking section used in manual pipe jacking construction by sleeving, and then detachably connects the axially arranged protection part to the front end of the fixing part, so that the protection part extends to the front end of the pipe jacking section, thereby supporting the soil at the front end of the pipe jacking section and protecting the soil at the front end of the pipe jacking section from collapsing. And if the protection part is damaged during construction, it can be directly removed and replaced to ensure that the protection part reliably supports the soil, minimizing the risk of soil collapse. By fixedly connecting the cutting part to the front end of the protection part, and the cutting part forms a front cutting surface that is inclined axially outward from bottom to top, during the manual pipe jacking construction process, the cutting part can quickly cut the soil, improving the construction efficiency. This solution connects the replaceable protection part and the support part by setting the fixing part on the pipe jacking section. Compared with the prior art, it can prevent the soil at the front end of the pipe jacking section from collapsing and improve the construction efficiency at the same time, providing safety and progress guarantee for the manual pipe jacking tunnel construction, with strong practicability and being suitable for wide promotion and application.

[0018] In addition to the purposes, features and advantages described above, the present utility model has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0020] Figure 1 is a schematic cross-sectional view of the soil cutting and protection device for manual pipe jacking according to a preferred embodiment of the present utility model from the first perspective when installed on the pipe jacking section;

[0021] Figure 2 is a schematic cross-sectional view of the soil cutting and protection device for manual pipe jacking according to a preferred embodiment of the present utility model from the second perspective;

[0022] Figure 3 is a schematic cross-sectional view of the soil cutting and protection device for manual pipe jacking according to a preferred embodiment of the present utility model from the third perspective.

[0023] LEGEND DESCRIPTION:

[0024] 100, fixing part; 110, second connecting ring; 120, outer ring fixing plate; 130, inner ring fixing plate; 140, support plate; 200, protection part; 210, circular bearing plate; 220, convex arc bearing plate; 230, concave arc bearing plate; 240, first connecting ring; 300, cutting part; 400, connecting window; 500, connecting structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, the present utility model can be implemented in many different ways defined and covered by the following.

[0026] As Figures 1 - 3 shown, the soil cutting and protection device for manual pipe jacking in this embodiment includes a fixing part for fixedly sleeving on the pipe jacking section, a protection part axially arranged and detachably connected to the front end of the fixing part for extending to the front end of the pipe jacking section, and a cutting part fixedly connected to the front end of the protection part for cutting the soil. The front cutting surface of the cutting part is arranged obliquely upward and axially outward from bottom to top.

[0027] As Figures 1 - 3 shown, specifically, for the soil cutting and protection device for manual pipe jacking of the present utility model, the fixing part is fixedly sleeved on the pipe jacking section used for manual pipe jacking construction, and then the axially arranged protection part is detachably connected to the front end of the fixing part, so that the protection part extends to the front end of the pipe jacking section, thereby supporting the soil at the front end of the pipe jacking section and protecting against the collapse of the soil at the front end of the pipe jacking section. And if the protection part is damaged during construction, it can be directly removed and replaced to ensure that the protection part reliably supports the soil, minimizing the risk of soil collapse; by fixedly connecting the cutting part to the front end of the protection part, and the cutting part forms a front cutting surface arranged obliquely upward and axially outward from bottom to top, so that during the manual pipe jacking construction process, the cutting part can quickly cut the soil, improving the construction efficiency. This solution connects the replaceable protection part and support part by setting the fixing part on the pipe jacking section. Compared with the prior art, it can prevent the collapse of the soil at the front end of the pipe jacking section and improve the construction efficiency at the same time, providing safety and progress guarantee for the manual pipe jacking tunnel construction, with strong practicability and being suitable for wide promotion and application.

[0028] It should be understood that the axial direction in this embodiment is based on the axial direction of the pipe jacking section.

[0029] Optionally, after the fixing part is welded and fixed on the steel bars of the pipe jacking section, it is then cast into an integral body with the pipe jacking section.

[0030] As Figure 1 shown, in this embodiment, the protection part includes an annular bearing plate axially arranged and fixedly connected to the cutting part, a convex arc-shaped bearing plate bent upward and arranged inside the annular bearing plate for supporting the upper end part of the annular bearing plate, a concave arc-shaped bearing plate fixedly connected to the convex arc-shaped bearing plate and bent downward and arranged inside the annular bearing plate for supporting the lower end part of the annular bearing plate, and a connecting ring I radially arranged and fixedly connected to the annular bearing plate, the convex arc-shaped bearing plate and the concave arc-shaped bearing plate respectively. The connecting ring I is detachably connected to the fixing part.

[0031] As Figure 1As shown, specifically, by fixedly connecting the first connecting ring to the circular bearing plate, the convex arc-shaped bearing plate, and the concave arc-shaped bearing plate respectively, the protection part is made into an integral structure, thereby improving the overall structural strength. The circular bearing plate directly supports the soil mass, and then the convex arc-shaped bearing plate and the concave arc-shaped bearing plate support the circular bearing plate from the inside to share the pressure borne by the circular bearing plate, realizing the indirect support for the soil mass and effectively protecting the soil mass at the front end of the pipe jacking pipe joint from collapsing.

[0032] In this embodiment, reinforcing ribs are arranged between the circular bearing plate and the convex arc-shaped bearing plate. Specifically, by arranging reinforcing ribs between the circular bearing plate and the convex arc-shaped bearing plate, the structural strength between the circular bearing plate and the convex arc-shaped bearing plate is improved, realizing the reliable support for the soil mass.

[0033] In this embodiment, reinforcing ribs are arranged between the circular bearing plate and the concave arc-shaped bearing plate. Specifically, by arranging reinforcing ribs between the circular bearing plate and the concave arc-shaped bearing plate, the structural strength between the circular bearing plate and the concave arc-shaped bearing plate is improved, realizing the reliable support for the soil mass.

[0034] As Figures 1 - 3 shown, in this embodiment, the fixing part includes a second connecting ring arranged radially and closely attached to the first connecting ring. A connecting window is opened at the connection between the protection part and the fixing part. The soil cutting protection device further includes a connecting structure axially penetrating through the first connecting ring and the second connecting ring and corresponding to the connecting window for detachably connecting the fixing part and the protection part. Specifically, through the connecting window, the connecting structure can axially penetrate through the first connecting ring and the second connecting ring to connect the first connecting ring and the second connecting ring together, and further detachably connect the fixing part and the protection part.

[0035] As Figure 1 shown, in this embodiment, the fixing part further includes an outer ring fixing plate fixedly connected to the second connecting ring and used for fixedly sleeving on the radial outer wall of the pipe jacking pipe joint, an inner ring fixing plate fixedly connected to the second connecting ring and used for fixedly sleeving on the radial inner wall of the pipe jacking pipe joint, and a support ring respectively fixedly connected to the outer ring fixing plate and the inner ring fixing plate and used for closely attaching to the axial front end face of the pipe jacking pipe joint. Specifically, after the support ring is welded and fixed between the outer ring fixing plate and the inner ring fixing plate, the outer ring fixing plate is welded and fixed on the outer wall of the pipe jacking pipe joint, the inner ring fixing plate is welded and fixed on the inner wall of the pipe jacking pipe joint, and then the second connecting ring is respectively welded and fixed on the front ends of the outer ring fixing plate and the inner ring fixing plate.

[0036] As Figure 1As shown in the figure, in this embodiment, a first connecting ring is axially provided with a first connecting hole, and a second connecting ring is axially provided with a second connecting hole corresponding to the first connecting hole. The connecting structure includes a connecting bolt axially passing through the first connecting hole and the second connecting hole, and a locking nut for threadedly connecting with the protruding end of the connecting bolt. Specifically, the connecting bolt passes through the first connecting hole and the second connecting hole, and then the locking nut is threadedly connected with the protruding end of the connecting bolt to lock the connecting bolt, so that the fixing part and the protection part are detachably connected. After the protection part is damaged under pressure, the locking nut is loosened to remove the connecting bolt, and then the protection part can be replaced.

[0037] As Figure 3 shown in the figure, in this embodiment, there are multiple first connecting holes, and the multiple first connecting holes are arranged at intervals along the circumferential direction of the first connecting ring. The first connecting ring, the second connecting ring, the connecting structure and the connecting window are arranged in one-to-one correspondence. Specifically, through the cooperation of multiple connecting structures, the first connecting ring, the second connecting ring and the connecting window, the fixing part and the protection part are firmly connected.

[0038] In this embodiment, the radial thickness of the cutting part is 1 mm - 4 mm. Specifically, when the radial thickness of the cutting part is between 1 mm and 4 mm, the strength of the cutting part is reliable, it is not easy to deform during the process of cutting the soil body, and the cutting effect is good; when the radial thickness of the cutting part is less than 1 mm, the strength of the cutting part is poor and it is easy to deform during the process of cutting the soil body; when the radial thickness of the cutting part is greater than 4 mm, the cutting pressure exerted by the cutting part on the soil body is small and the cutting effect is poor. Optionally, the radial thickness of the circular bearing plate is 1 mm - 4 mm. Optionally, the radial thickness of the convex arc-shaped bearing plate is 1 mm - 4 mm. Optionally, the radial thickness of the concave arc-shaped bearing plate is 1 mm - 4 mm.

[0039] As Figure 2 shown in the figure, in this embodiment, the front end of the cutting part is arranged in a serrated shape. Specifically, the serrated shape is beneficial to concentrating the cutting force and improving the cutting efficiency.

[0040] As Figure 1 shown in the figure, in this embodiment, the inclination angle of the front cutting surface of the cutting part relative to the horizontal plane is less than 45° + φ / 2, where φ is the internal friction angle of the soil layer where the top cover pipe section is located. Specifically, by ensuring that the inclination angle of the front cutting surface of the cutting part relative to the horizontal plane is less than 45° + φ / 2, the construction safety is improved. It should be understood that the internal friction angle of the soil layer where the top cover pipe section is located is a determined value in the actual construction of the manual pipe jacking.

[0041] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A soil cutting protection device for artificial pipe jacking, characterized in that: It includes a fixing part for fixing on the top pipe section, a protecting part for extending to the front end of the top pipe section and detachably connected to the front end of the fixing part along the axial direction, and a cutting part for cutting soil fixedly connected to the front end of the protecting part, wherein the front end cutting surface of the cutting part is arranged from bottom to top and tilted outward along the axial direction.

2. The soil cutting protection device for artificial pipe jacking according to claim 1 is characterized in that: The protective part includes an annular pressure plate arranged axially and fixedly connected to the cutting part, a convex arc pressure plate bent upwardly arranged in the annular pressure plate for supporting the upper end of the annular pressure plate, a concave arc pressure plate fixedly connected to the convex arc pressure plate and bent downwardly arranged in the annular pressure plate for supporting the lower end of the annular pressure plate, and a connecting ring one arranged radially and fixedly connected to the annular pressure plate, the convex arc pressure plate and the concave arc pressure plate respectively, and the connecting ring one is detachably connected to the fixing part.

3. The soil cutting protection device for artificial pipe jacking according to claim 2 is characterized in that: Reinforcing ribs are arranged between the annular pressure plate and the convex arc pressure plate; and / or Reinforcing ribs are arranged between the annular pressure bearing plate and the concave arc-shaped pressure bearing plate.

4. The soil cutting protection device for artificial pipe jacking according to claim 2 is characterized in that: The fixing part includes a connecting ring 2 which is arranged radially and tightly attached to the connecting ring 1. A connecting window is provided at the connection between the protecting part and the fixing part. The soil cutting protection device also includes a connecting structure which is axially penetrated through the connecting ring 1 and the connecting ring 2 and is arranged corresponding to the connecting window and is used to make the fixing part and the protecting part detachably connected.

5. The soil cutting protection device for artificial pipe jacking according to claim 4 is characterized in that: The fixing part also includes an outer ring fixing plate fixedly connected to the connecting ring 2 and used for fixedly sleeved on the radial outer wall of the top pipe segment, an inner ring fixing plate fixedly connected to the connecting ring 2 and used for fixedly sleeved on the radial inner wall of the top pipe segment, and a support ring fixedly connected to the outer ring fixing plate and the inner ring fixing plate respectively and used for tightly contacting the axial front end surface of the top pipe segment.

6. The soil cutting protection device for artificial pipe jacking according to claim 5, characterized in that: A connecting hole 1 is axially opened on the connecting ring 1, and a connecting hole 2 is axially opened on the connecting ring 2 and arranged corresponding to the connecting hole 1. The connecting structure includes a connecting bolt axially penetrated through the connecting hole 1 and the connecting hole 2, and a locking nut for threaded connection with the protruding end of the connecting bolt.

7. The soil cutting protection device for artificial pipe jacking according to claim 6, characterized in that: A plurality of connection holes 1 are provided, and the plurality of connection holes 1 are arranged at intervals along the circumference of the connection ring 1. The connection ring 1, the connection ring 2, the connection structure and the connection window are arranged one by one.

8. The soil cutting protection device for artificial pipe jacking according to any one of claims 1 to 7, characterized in that: The radial thickness of the cutting portion is 1 mm to 4 mm.

9. The soil cutting protection device for artificial pipe jacking according to any one of claims 1 to 7, characterized in that: The front end of the cutting part is arranged in a sawtooth shape.

10. The soil cutting protection device for artificial pipe jacking according to any one of claims 1 to 7, characterized in that: The inclination angle of the front cutting surface of the cutting part relative to the horizontal plane is less than 45°+φ / 2, where φ is the internal friction angle of the soil layer where the top cover pipe section is located.

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