Anti-blocking type self-overflow grouting pipe connecting device for pipe jacking engineering
By setting fixed embedded parts and ring-shaped fixed embedded parts in the pipe jacking project, combined with the design of bolts and clamps, the problem of easy blockage of steel sleeves was solved, the overflow channel was unobstructed and the pipe sections were stably connected, thus improving the efficiency of pipe jacking construction.
Patent Information
- Application Number
- CN202422672594.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-04
AI Technical Summary
In existing pipe jacking construction, the connection method between the steel casing and the pipe section is prone to causing blockage of the grout overflow channel, which affects the grout drag reduction effect.
Fixed embedded parts and annular fixed embedded parts are installed on the concrete pipe section, and slots are provided on the inner wall of the steel sleeve. Through the cooperation of bolts and clamps, the steel sleeve is fixed to the concrete pipe section, avoiding relative backward movement of the steel sleeve and ensuring unobstructed grout overflow channel.
This effectively prevents the steel casing from shifting backward during the jacking process, keeps the slurry overflow channel unobstructed, enhances the fixing strength of the pipe section and the steel casing, and ensures the slurry drag reduction effect.
Smart Images
Figure CN223549942U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe jacking construction, and in particular includes a plug-proof self-overflowing grouting pipe connection device for pipe jacking projects. Background Technology
[0002] In pipe jacking construction, thixotropic mud is often used for grouting to reduce resistance during pipe excavation, forming a stable mud sleeve around the pipe. However, directly injecting pressurized mud onto the surrounding soil can erode soil particles and disturb the soil layer, potentially leading to soil loss, voids, or even soil collapse.
[0003] CN217272336U proposes a self-filling grouting pipe for pipe jacking projects that prevents clogging by using a steel sleeve at the end of a concrete pipe section and reserving an overflow channel. However, the connection between the steel sleeve and the pipe section is only socket-insertion, and since the overflow channel is reserved, there must be a gap between the steel sleeve and the pipe sections before and after it. During the pipe jacking process, the steel sleeve will move backward relative to the jacking pipe, causing the overflow channel to become blocked and affecting the drag reduction effect of the grout.
[0004] Therefore, there is an urgent need for a self-filling grouting pipe connection device for pipe jacking projects to overcome the above problems. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a plug-proof self-overflowing grouting pipe connection device for pipe jacking projects.
[0006] This anti-clogging self-overflowing grouting pipe connection device for pipe jacking projects includes: a fixed embedded part and a ring-shaped fixed embedded part; a steel sleeve is fitted over the concrete pipe section, and the fixed embedded part and the ring-shaped fixed embedded part are respectively installed on the concrete pipe section. One end of the fixed embedded part and the ring-shaped fixed embedded part is embedded in the concrete pipe section, and the other end extends to the outside of the concrete pipe section and extends forward.
[0007] The inner wall of the steel sleeve is provided with a slot, the slot opening facing the rear end of the steel sleeve; the end of the fixed embedded part protruding from the outside of the concrete pipe section is inserted into the slot to fix the relative position of the concrete pipe section and the steel sleeve.
[0008] The steel sleeve has several circumferentially oriented bayonets, with bolts inserted into the bayonets. The end of the bolt facing the inside of the steel sleeve is fixedly connected to a clamp. The movement of the bolt within the bayonets controls the connection and separation of the clamp and the annular fixed embedded part.
[0009] Preferably, the fixed embedded part is installed in front of the last concrete pipe section inside the steel sleeve, and the annular fixed embedded part is set on the concrete pipe section before the fixed embedded part.
[0010] Preferably, the front end of the bolt-fixed connection clamp has a groove on the outer side of the annular fixed embedded part in the radial direction of the steel sleeve, with the opening of the groove facing forward, for temporarily storing the clamp.
[0011] As a preferred option, the bayonet is L-shaped, with the bayonet width matching the bolt diameter, and the bayonet is sealed with sealing rubber after the steel sleeve and concrete pipe section are connected.
[0012] Preferably, the clamp is a rectangular plate with the same curvature as the outer wall of the concrete pipe section.
[0013] The beneficial effects of this utility model are:
[0014] 1) In this utility model, a fixed embedded part is set on the concrete pipe section at the rear, and a slot is set on the inner wall of the steel sleeve. The fixed embedded part is inserted into the slot. During the jacking process, the rear pipe section moves forward with the steel sleeve to avoid the steel sleeve moving backward and blocking the overflow channel.
[0015] 2) This utility model opens a slot on the steel pipe sleeve, so that the bolt controlling the movement of the clamp moves along the L-shaped slot, thereby realizing the insertion and separation of the clamp and the annular fixed embedded part, further strengthening the fixing strength of the pipe section and the steel sleeve, and preventing the steel sleeve from moving backward relative to the outside. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall connection device;
[0017] Figure 2 Detailed diagram of the checkpoint.
[0018] Explanation of reference numerals in the attached drawings: 1. Fixed embedded part; 2. Circular fixed embedded part; 3. Steel sleeve; 4. Clip; 5. Seal rubber; 6. Slot; 7. Gap; 8. Bayonet; 9. Square hole; 10. Detailed Implementation
[0019] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
[0020] Example 1
[0021] As one example, such as Figure 1 As shown, this anti-clogging self-overflowing grouting pipe connection device for pipe jacking projects includes: a fixed embedded part 1; several concrete pipe sections connected in sequence, and a steel sleeve 3 covering the outside of the several concrete pipe sections.
[0022] Specifically, the fixed embedded part 1 is installed in front of the last concrete pipe section inside the steel sleeve 3. Four to eight fixed embedded parts are arranged along the circumference of the pipe section, all on the same plane. Each fixed embedded part 1 is L-shaped, with one end embedded in the concrete pipe section and the other end extending to the outside of the concrete pipe section and forward.
[0023] The inner wall of the steel sleeve 3 is provided with a slot 8, the opening of the slot 8 faces the rear end of the steel sleeve 3, and the shape of the slot 8 and the exposed end of the fixed embedded part 1 are complementary; the end of the fixed embedded part 1 exposed outside the concrete pipe section is inserted into the slot 8 to fix the relative position of the concrete pipe section and the steel sleeve 3.
[0024] The slot 8 is located behind the steel sleeve 3. When the steel sleeve 3 is connected to the rear pipe section, the fixed embedded part 1 is inserted into the slot 8 to fix the steel sleeve 3 and the rear pipe section. The advancement of the rear pipe section drives the steel sleeve 3 and the front pipe section to advance together, avoiding relative displacement between the steel sleeve and the pipe section and blocking the grout overflow channel.
[0025] Example 2
[0026] As another embodiment, this embodiment two proposes a more specific anti-clogging self-overflowing grouting pipe connection device for pipe jacking projects based on embodiment one, which also includes an annular fixed embedded part 2, and the steel pipe sleeve 3 is also provided with a clamp 4, bolt 5, sealing rubber 6, groove 7, slot 8, bayonet 9, and square hole 10.
[0027] The annular fixed embedded part 2 is installed on the concrete pipe section preceding the fixed embedded part 1. The annular fixed embedded part 2 is annular with an "L" shaped cross section. One end of the annular fixed embedded part 2 is embedded in the concrete pipe section, and the other end extends to the outside of the concrete pipe section and forward.
[0028] The steel sleeve 3 has several circumferentially oriented slots 9, with bolts 5 inserted into the slots 9. The end of the bolts 5 facing the inside of the steel sleeve 3 is fixedly connected to a clamp 4. The bolts 5 can move within the slots 9 to control the connection and separation of the clamp 4 and the annular fixed embedded part 2.
[0029] The clamp 4 is a slightly curved rectangular plate with the same curvature as the outer wall of the concrete pipe section. It is installed in front of the steel sleeve 3, with 4 to 8 clamps arranged along the circumference of the steel sleeve 3, all on the same plane. The front end of the clamp 4 has a hole and is fixedly connected to the bolt 5 to form a whole. The steel sleeve 3 has a groove 7 on the outer side of the annular fixed embedded part 2 in the radial direction. The opening of the groove 7 faces forward and is used to temporarily store the clamp 4.
[0030] Before use, the clamp 4 is located in the slot 7. When in use, push the bolt 5 forward to drive the clamp 4 into the square hole 10. Then press down the bolt 5 and move the bolt 5 one after another so that the clamp 4 passes through the gap of the annular fixed embedded part 2. Then move the bolt 5 to the right to limit the displacement of the bolt along the pipe section direction, which can ensure that the steel sleeve 3 is firmly fixed to the front pipe section.
[0031] like Figure 2 As shown, the bayonet 9 is L-shaped, and its width matches the diameter of the bolt 5, allowing only the screw to pass through. The square hole 10 is located on the inner side of the front part of the steel sleeve 3. After the steel sleeve 3 and the concrete pipe section are connected, the bayonet 9 is sealed with sealing rubber 6 to prevent water from entering.
[0032] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 1 can be referred to each other, and will not be repeated in this application.
[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
Claims
1. A self-overflowing grouting pipe connection device for pipe jacking projects, characterized in that, include: Fixed embedded parts and annular fixed embedded parts; the concrete pipe section is covered with a steel sleeve, and the fixed embedded parts and annular fixed embedded parts are respectively installed on the concrete pipe section. One end of the fixed embedded parts and the annular fixed embedded parts are embedded in the concrete pipe section, and the other end extends to the outside of the concrete pipe section and extends forward. The inner wall of the steel sleeve is provided with a slot, the slot opening facing the rear end of the steel sleeve; the end of the fixed embedded part protruding from the outside of the concrete pipe section is inserted into the slot to fix the relative position of the concrete pipe section and the steel sleeve. The steel sleeve has several circumferentially oriented bayonets, with bolts inserted into the bayonets. The end of the bolt facing the inside of the steel sleeve is fixedly connected to a clamp. The movement of the bolt within the bayonets controls the connection and separation of the clamp and the annular fixed embedded part.
2. The anti-clogging self-overflowing grouting pipe connection device for pipe jacking projects according to claim 1, characterized in that, The fixed embedded part is installed in front of the last concrete pipe section inside the steel sleeve, and the annular fixed embedded part is set on the concrete pipe section before the fixed embedded part.
3. The anti-clogging self-overflowing grouting pipe connection device for pipe jacking projects according to claim 1, characterized in that, At the front end of the bolt-fixed connection clamp, the steel sleeve has a groove on the outer side of the annular fixed embedded part in the radial direction. The opening of the groove faces forward and is used to temporarily store the clamp.
4. The anti-clogging self-overflowing grouting pipe connection device for pipe jacking projects according to claim 1, characterized in that, The bayonet is L-shaped, and the width of the bayonet matches the diameter of the bolt. After the steel sleeve and the concrete pipe section are connected, the inside of the bayonet is sealed with sealing rubber.
5. The anti-clogging self-overflowing grouting pipe connection device for pipe jacking projects according to claim 1, characterized in that, The clamp is a rectangular plate with the same curvature as the outer wall of the concrete pipe section.