Method for Installing Grease Injection Pipeline at Tail Seal of Shield Machine during Tunneling

Abstract

The present invention provides a method for installing a grease injection pipeline at the shield tail during the tunneling of a shield machine, including: a cover plate, a grease guiding steel groove, and a hose joint. Among them, grease injection holes are provided at both ends of the cover plate, a U-shaped groove is provided at the bottom of the grease guiding steel groove, both ends of the U-shaped groove are closed, and a reserved hole communicating with the U-shaped groove is provided at one end of the grease guiding steel groove. This enables the shield machine to complete the installation of a new grease injection pipeline at the shield tail through a simple structure during tunneling, is applicable to various parts of the shield tail, can effectively solve the problem of slurry leakage caused by uneven and insufficient shield tail grease, and greatly guarantees the tunneling safety.

Description

Technical Field

[0001] The present invention relates to the field of shield machine seals, and particularly to a method for installing a tail seal grease pipeline during shield machine tunneling. Background Art

[0002] At present, shield tunneling construction is widely used in urban rail transit construction projects, underground utility tunnel projects, railway and highway tunnel projects due to its safety, environmental protection, and speed characteristics, and is the first choice for construction. During the entire shield tunneling construction process, tail seal grease plays a role in sealing, lubrication, waterproofing, and anti-corrosion. The conventional injection method during tunneling is mechanical grease injection. However, due to the fixed tail seal grease pipeline and the excessive distance between some grease pipelines, it is difficult to ensure the grease sealing effect, which is likely to cause water and sand gushing at the tail seal. In severe cases, it may even cause accidents such as excessive displacement of the surrounding strata and tunnel collapse. Therefore, there is an urgent need for a method suitable for modifying and installing the tail seal grease pipeline during shield machine tunneling to solve the problem of poor sealing caused by the excessive distance between some tail seal grease pipelines of the existing shield machine. Summary of the Invention

[0003] The main purpose of the present invention is to provide a method for installing a tail seal grease pipeline during shield machine tunneling, which solves the problem of poor sealing caused by the fixed tail seal grease pipeline and the excessive distance between the grease pipelines during shield machine tunneling.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: a method for installing a tail seal grease pipeline during shield machine tunneling, including: a cover plate, a grease guiding steel groove, and a hose joint. Among them, injection holes are provided at both ends of the cover plate, a U-shaped groove is provided at the bottom of the grease guiding steel groove, both ends of the U-shaped groove are closed, and a reserved hole communicating with the U-shaped groove is provided at one end of the grease guiding steel groove;

[0005] The method includes:

[0006] S1. After the ring tunneling is completed, assemble the wedge-shaped segment in the tail seal area where the grease pipeline needs to be added;

[0007] S2. Pause tunneling and create temporary sealing measures for the local area of the wedge-shaped segment;

[0008] S3. Remove the wedge-shaped segment and remove the tail seal brush in the area where the grease pipeline needs to be added;

[0009] S4. Open a groove at the tail seal where the tail seal brush is removed, fix the cover plate on the groove, then fix the grease guiding steel groove on the injection hole of the cover plate away from the tail seal. The U-shaped groove of the grease guiding steel groove communicates with the injection hole, and install the removed tail seal brush back;

[0010] S5. Fix the hose joint on the reserved hole of the grease guiding steel groove and connect the injection pipe to the hose joint;

[0011] S6. Finally, reinstall the removed wedge-shaped segments and resume excavation.

[0012] In the preferred embodiment, the grease-guiding steel groove includes a channel steel adapter and a U-shaped steel groove fixed to each other, wherein the front end of the U-shaped groove of the U-shaped steel groove is open and the end is closed, and a grease-guiding groove is provided at the bottom of the channel steel adapter, which covers the grease injection hole and is connected to the U-shaped groove of the U-shaped steel groove.

[0013] In the preferred embodiment, the specific installation method of the grease guide steel groove in step S4 is: fix a channel steel adapter on the grease injection hole of the cover plate away from the shield tail, and make the grease guide groove cover the grease injection hole, then reinstall the removed shield tail brush, and finally fix the U-shaped steel groove to the channel steel adapter, and make the U-shaped groove of the U-shaped steel groove connected to the grease guide groove.

[0014] In a preferred embodiment, the grease guide groove is funnel-shaped, the inlet portion thereof is the same size as the U-shaped groove of the U-shaped steel groove, and the two are connected, and the funnel body portion covers the grease injection hole.

[0015] In a preferred embodiment, a fitting block is fixedly provided at the bottom of the channel steel adapter, and a fitting groove corresponding to the fitting block is provided at the top of the cover plate.

[0016] In a preferred embodiment, the end of the U-shaped steel channel is closed by fixing a steel blocking block.

[0017] In a preferred embodiment, an embedded groove for embedding a cover plate is further provided above the groove, and the cover plate is embedded in the embedded groove by welding.

[0018] In a preferred embodiment, the temporary sealing measure for the local area in step S2 is specifically one of a grouting method and a freezing method.

[0019] In a preferred embodiment, the specific method of fixing is welding.

[0020] In a preferred embodiment, welding grooves for facilitating welding are provided at the edge connections of the channel steel adapter, the U-shaped steel channel and the steel blocking block.

[0021] The present invention provides a method for installing a grease injection pipeline at the shield tail during tunneling of a shield machine, so that the shield machine can complete the installation of a new grease injection pipeline at the shield tail through a simple structure during tunneling. The method is applicable to various parts of the shield tail, can effectively solve the problem of grout leakage caused by uneven fullness of grease at the shield tail, and greatly ensures tunneling safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples:

[0023] Figure 1 This is a structural diagram of the shield tail grease pipeline of the present invention;

[0024] Figure 2 It is the structure diagram of the grease - guiding steel groove and the cover plate of the present invention;

[0025] Figure 3 It is the present invention Figure 2 The bottom structure diagram in;

[0026] Figure 4 It is the structure diagram of the cover plate of the present invention;

[0027] Figure 5 It is the structure diagram of the channel steel adapter of the present invention;

[0028] Figure 6 It is the bottom structure diagram of the channel steel adapter of the present invention;

[0029] Figure 7 It is the upward - looking structure diagram of the channel steel adapter of the present invention;

[0030] Figure 8 It is the structure diagram of the U - shaped steel groove of the present invention;

[0031] Figure 9 It is the top - view structure diagram of the U - shaped steel groove of the present invention;

[0032] Figure 10 It is the structure diagram of the steel plugging block of the present invention;

[0033] Figure 11 It is the overall assembly structure diagram of the pipeline of the present invention;

[0034] In the figure: 1 existing grease pipeline; 2 grease pipeline to be added; 3 wedge - shaped segment; 4 grease - guiding steel groove; 5 groove; 6 cover plate; 61 fitting groove; 7 grease injection hole; 8 channel steel adapter; 81 fitting block; 9 grease - guiding groove; 10 U - shaped steel groove; 11 reserved hole; 12 steel plugging block. Detailed implementation method

[0035] Embodiment 1

[0036] As Figures 1-11 shown, a method for installing a tail - end grease injection pipeline during the tunneling of a shield machine includes: a cover plate 6, a grease - guiding steel groove 4, and a hose joint 13. Among them, grease injection holes 7 are provided at both ends of the cover plate 6, a U - shaped groove is provided at the bottom of the grease - guiding steel groove 4, both ends of the U - shaped groove are closed, and a reserved hole 11 communicating with the U - shaped groove is provided at one end of the grease - guiding steel groove 4;

[0037] This method includes:

[0038] S1. After the ring tunneling is completed, assemble the wedge - shaped segment 3 in the tail - end area where the grease pipeline needs to be added;

[0039] S2. Pause tunneling and create temporary sealing measures for a local area of the wedge - shaped segment 3, specifically one of the grouting method and the freezing method;

[0040] S3. Demolish the wedge segment 3 and remove the tail seal brushes in the area where the grease pipeline needs to be added;

[0041] S4. Open a groove 5 at the tail of the shield where the tail seal brushes are removed, fix the cover plate 6 on the groove 5, then fix the grease guiding steel groove 4 on the grease injection hole 7 of the cover plate 6 away from the shield tail. The U-shaped groove of the grease guiding steel groove 4 is connected to the grease injection hole 7, and install the removed tail seal brushes back;

[0042] S5. Fix a hose connector 13 on the reserved hole 11 of the grease guiding steel groove 4 and connect the grease injection pipe to the hose connector 13;

[0043] S6. Finally, install the removed wedge segment 3 back and resume tunneling.

[0044] During use, the grease injection pipe injects grease into the grease guiding steel groove 4 through the hose connector 13. The grease flows along the U-shaped groove of the grease guiding steel groove 4 to the cover plate 6 and enters the groove 5 through the grease injection hole 7 of the cover plate 6. Finally, the grease injection effect is achieved through another grease injection hole 7. The groove 5 can hold an appropriate amount of grease to ensure that the grease injection is continuous.

[0045] Embodiment 2

[0046] Further described in combination with Embodiment 1. As Figures 2-11 the shown structure,

[0047] In the preferred solution, the grease guiding steel groove 4 includes a channel steel adapter 8 and a U-shaped steel groove 10 fixedly connected. Among them, the front end of the U-shaped groove of the U-shaped steel groove 10 is open and the end is closed. A grease guiding groove 9 is provided at the bottom of the channel steel adapter 8. The grease guiding groove 9 covers the grease injection hole 7 and is connected to the U-shaped groove of the U-shaped steel groove 10. The channel steel adapter 8 closes the front-end opening of the U-shaped steel groove 10.

[0048] The specific installation method of the grease guiding steel groove 4 in step S4 is: fix the channel steel adapter 8 on the grease injection hole 7 of the cover plate 6 away from the shield tail, and make the grease guiding groove 9 cover the grease injection hole 7. Then install the removed tail seal brushes back. Finally, fix the U-shaped steel groove 10 to the channel steel adapter 8 and make the U-shaped groove of the U-shaped steel groove 10 communicate with the grease guiding groove 9;

[0049] Thus, during installation, the grease guiding steel groove 4 can be installed in a split manner, avoiding installing the grease guiding steel groove 4 with a certain length in a narrow space and improving the installation convenience.

[0050] In the preferred solution, the grease guiding groove 9 is funnel-shaped, its inlet part has the same size as the U-shaped groove of the U-shaped steel groove 10 and the two are connected. The bucket part covers the grease injection hole 7. Using the large size of the bucket part of the grease guiding groove 9 can improve the efficiency of grease entering the grease injection hole 7.

[0051] In a preferred embodiment, a fitting block 81 is fixedly provided at the bottom of the channel steel adapter 8, and a fitting groove 61 corresponding to the fitting block 81 is provided at the top of the cover plate 6. Through the fitting of the fitting block 81 and the fitting groove 61, the positioning and installation of the channel steel adapter 8 can be quickly realized, ensuring that the grease guiding groove 9 covers the grease injection hole 7.

[0052] In a preferred embodiment, the end of the U-shaped steel groove 10 is closed by fixedly installing a steel plugging block 12. The size of the steel plugging block 12 is the same as the size of the end of the U-shaped steel groove 10, achieving the effect of closing the U-shaped steel groove 10. Thus, the commonly used U-shaped steel groove 10 on site can be used for transformation without customization.

[0053] It should be noted that the specific fixing methods described above are all welding. Welding grooves convenient for welding are provided at the edge joints of the channel steel adapter 8, the U-shaped steel groove 10, and the steel plugging block 12.

[0054] In a preferred embodiment, an embedded groove for embedding the cover plate 6 is further opened above the groove 5, and the cover plate 6 is embedded in the embedded groove by welding.

[0055] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. Method for installing grease injection pipeline at shield tail during shield tunneling, characterized in that, Including: A cover plate (6), a grease guiding steel groove (4) and a hose connector (13). Both ends of the cover plate (6) are provided with grease injection holes (7). The bottom of the grease guiding steel groove (4) is provided with a U-shaped groove, both ends of the U-shaped groove are closed, and a reserved hole (11) communicating with the U-shaped groove is arranged at one end of the grease guiding steel groove (4). The method includes: S1. After the circular tunneling is completed, assemble the wedge-shaped segment (3) in the shield tail area where the grease pipeline needs to be added. S2. Suspend tunneling and create temporary sealing measures for a local area of the wedge-shaped segment (3). S3. Remove the wedge-shaped segment (3) and remove the shield tail brush in the area where the grease pipeline needs to be added. S4. Open a groove (5) at the shield tail where the shield tail brush is removed, fixedly install the cover plate (6) on the groove (5), then fixedly install the grease guiding steel groove (4) on the grease injection hole (7) away from the shield tail of the cover plate (6). The U-shaped groove of the grease guiding steel groove (4) communicates with the grease injection hole (7), and install the removed shield tail brush back. S5. Fix the hose connector (13) on the reserved hole (11) of the grease guiding steel groove (4) and connect the grease injection pipe to the hose connector (13). S6. Finally, install the removed wedge-shaped segment (3) back and resume tunneling. The grease guiding steel groove (4) includes a channel steel adapter (8) and a U-shaped steel groove (10) fixedly connected. The front end of the U-shaped groove of the U-shaped steel groove (10) is open and the end is closed. A grease guiding groove (9) is arranged at the bottom of the channel steel adapter (8). The grease guiding groove (9) covers the grease injection hole (7) and communicates with the U-shaped groove of the U-shaped steel groove (10).

2. The method for installing a tail seal grease injection pipeline during the tunneling of a shield machine according to claim 1, characterized in that: The specific installation method of the grease guiding steel groove (4) in step S4 is: fixedly install the channel steel adapter (8) on the grease injection hole (7) away from the shield tail of the cover plate (6), and make the grease guiding groove (9) cover the grease injection hole (7), then install the removed shield tail brush back, and finally fixedly connect the U-shaped steel groove (10) to the channel steel adapter (8) and make the U-shaped groove of the U-shaped steel groove (10) communicate with the grease guiding groove (9).

3. The method for installing the tail seal grease injection pipeline during the tunneling of the shield machine according to claim 2, wherein: The grease guiding groove (9) is funnel-shaped, the inlet part has the same size as the U-shaped groove of the U-shaped steel groove (10) and the two are communicated, and the bucket part covers the grease injection hole (7).

4. The method for installing a tail seal grease injection pipeline during the tunneling of a shield machine according to claim 3, characterized in that: A fitting block (81) is fixedly arranged at the bottom of the channel steel adapter (8), and a fitting groove (61) corresponding to the fitting block (81) is arranged at the top of the cover plate (6).

5. The method for installing the grease injection pipeline at the shield tail during the tunneling of a shield machine according to claim 4, characterized in that: The end of the U-shaped steel groove (10) is closed by fixedly installing a steel plugging block (12).

6. The method for installing a tail seal grease injection pipeline during the tunneling of a shield machine according to claim 1, characterized in that: An embedded groove for embedding the cover plate (6) is also opened above the groove (5), and the cover plate (6) is embedded in the embedded groove by welding.

7. The method for installing the tail seal grease injection pipeline during the tunneling of the shield machine according to claim 1, characterized in that: The temporary sealing measure for the local area in step S2 is specifically one of the grouting method and the freezing method.

8. The method for installing a tail seal grease injection pipeline during the tunneling of a shield machine according to claim 4, characterized in that: The specific fixing method is welding.

9. The method for installing the tail seal grease injection pipeline during the tunneling of a shield machine according to claim 5, characterized in that: Welding grooves for facilitating welding are arranged at the edge connection parts of the channel steel adapter (8), the U-shaped steel groove (10) and the steel plugging block (12).

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