Synchronous grouting and water glass filling device for subway engineering

Abstract

The utility model discloses a synchronous grouting and water glass filling device for subway engineering, which belongs to the technical field of shield construction and comprises a plurality of synchronous grouting pipes arranged at the tail of a shield, a standby grouting pipe is arranged beside each synchronous grouting pipe, the synchronous grouting pipes are connected with a synchronous grouting pipeline, and the standby grouting pipes are connected with a synchronous water glass pipeline. The synchronous water glass pipeline comprises a seamless steel pipe arranged in the standby grouting pipe; shield tail grease is injected into the standby grouting pipe firstly, then a seamless steel pipe is inserted, and one end of the seamless steel pipe extends out of the shield tail by a set distance. When the shield tunneling machine carries out tunneling, the synchronous grouting pipe injects mortar to the back of the duct piece, and the standby grouting pipe injects water glass to the back of the duct piece from the back of the synchronous grouting pipe; therefore, the setting time of mortar behind the duct piece can be shortened, the duct piece can be rapidly stabilized, and the situation that water glass reacts with cement mortar at a pipeline outlet, and pipe blocking is caused due to rapid setting can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield construction, and in particular relates to a synchronous grouting and water glass injection device for subway engineering. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] In subway construction, synchronous grouting is an essential function for shield machines. However, in special strata, the slurry typically takes a long time to solidify, and this time cannot be controlled in a timely manner, resulting in the floating of the segments and subsequent problems such as segment misalignment and damage. If grouting is performed through perforations within the segments, specialized workers and equipment are required, which not only delays construction but also easily causes blockage in the synchronous grouting pipeline, delaying construction and production.

[0004] To solve the above technical problems, patent CN210714722U discloses a synchronous dual-liquid grouting system, which uses the dual-liquid grouting machine on the shield machine and the spare grouting pipe at the shield tail to connect and use water glass liquid through the spare grouting pipe at the shield tail to make the synchronous slurry mortar solidify quickly, thereby controlling the floating of the pipe segment.

[0005] However, the above solution has the following technical problems: the reaction speed of water glass and cement slurry is very fast and difficult to control, and the mixed liquid is particularly likely to condense into lumps before the shield is driven out, resulting in pipe blockage, work delay and greater losses. Utility Model Content

[0006] In response to the above problems, the utility model provides a synchronous grouting and water glass injection device for subway projects, which can not only accelerate the setting time of the mortar behind the pipe segments, quickly stabilize the pipe segments, and reduce the problems of pipe segments floating, misalignment, and breakage; but also avoid the reaction between water glass and cement mortar at the pipeline outlet, causing rapid solidification and blockage of the pipe.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A synchronous grouting and water glass filling device for subway engineering, comprising a plurality of synchronous grouting pipes arranged at the tail of a shield, with a spare grouting pipe arranged next to each synchronous grouting pipe;

[0009] The synchronous grouting pipe is connected to the synchronous grouting pipeline, and the spare grouting pipe is connected to the synchronous water glass pipeline;

[0010] The synchronous water glass pipeline includes a seamless steel pipe arranged in a spare grouting pipe;

[0011] The spare grouting pipe is firstly injected with shield tail grease, and then the seamless steel pipe is inserted, and one end of the seamless steel pipe extends out of the shield tail by a distance set outside.

[0012] Preferably, the synchronous grouting pipeline includes a synchronous slurry storage tank, the synchronous slurry storage tank is filled with cement mortar, the synchronous grouting hose connects the synchronous slurry storage tank and the synchronous grouting pipe, and the synchronous grouting hose is provided with a synchronous grouting machine.

[0013] Preferably, a synchronous grouting ball valve is further provided on the synchronous grouting hose between the synchronous grouting machine and the synchronous grouting pipe.

[0014] Preferably, the synchronous water glass pipeline further includes a grouting hose, which is arranged along the synchronous grouting pipeline and connected to the water glass barrel, and a secondary grouting machine is provided on the grouting hose.

[0015] Preferably, a flange and a thread are welded and fixed to the other end of the seamless steel pipe, the flange is fixedly connected to the shield tail, and a conversion joint is installed on the thread; the seamless steel pipe is connected to the grouting hose through the conversion joint.

[0016] Preferably, a ball valve is also installed on the grouting hose between the secondary grouting machine and the seamless steel pipe.

[0017] Preferably, a one-way valve is also provided on the grouting hose between the ball valve and the seamless steel pipe.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are:

[0019] The device of the present invention utilizes the spare grouting pipe of the shield machine. A seamless steel pipe is arranged in the spare grouting pipe, and one end of the seamless steel pipe is extended out of the shield tail for a certain distance, and the other end is connected to the grouting hose, which is connected to the water glass barrel. When the shield machine is excavating, the synchronous grouting pipe injects mortar into the back of the pipe segment, and the spare grouting pipe injects water glass into the back of the pipe segment behind the synchronous grouting pipe. This can accelerate the setting time of the mortar behind the pipe segment, thereby quickly stabilizing the pipe segment and reducing the problems of pipe segment floating, misalignment and damage, and can also avoid the reaction of water glass and cement mortar at the pipeline outlet, causing rapid solidification and leading to pipe blockage.

[0020] In addition, the utility model also sets ball valves on the synchronous grouting pipeline and the synchronous water glass pipeline to control the flow rate and flow of mortar and water glass, which can adjust the mixing ratio of mortar and water glass and solve the problem of uncontrollable slurry solidification time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 This is an axial cross-sectional layout diagram of the device according to an embodiment of the present utility model;

[0023] Figure 2 This is an embodiment of the utility model Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 This is a circumferential cross-sectional layout diagram of the device of an embodiment of the present utility model;

[0025] In the picture:

[0026] 1. Water glass bucket; 2. Secondary grouting machine; 3. Grouting hose; 4. Ball valve; 41. Check valve; 42. Conversion joint; 5. Synchronous slurry storage tank; 6. Synchronous grouting machine; 7. Synchronous grouting hose; 8. Synchronous grouting ball valve; 9. Synchronous grouting pipe; 10. Seamless steel pipe; 11. Cement mortar; 12. Pipe segment; 13. Spare grouting pipe; 14. Shield tail; 15. Flange; 16. Water glass liquid. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] The utility model is described in detail below with reference to the accompanying drawings. The embodiment disclosed herein is a device for synchronous grouting and water glass filling in a subway project. Figure 1 As shown, it includes a synchronous grouting pipe 9, which is arranged inside the shield tail 14 of the shield machine. The synchronous grouting pipe 9 is connected to a synchronous grouting pipeline for injecting mortar into the back of the pipe segment 12 to fill the gap. Figure 3 As shown, in this embodiment, six synchronous grouting pipes 9 are evenly distributed inside the shield tail 14 of the shield machine.

[0029] like Figure 3 As shown, a spare grouting pipe 13 is provided beside each synchronous grouting pipe 9 to prevent the synchronous grouting pipe 9 from being blocked and unable to grout. This embodiment utilizes the spare grouting pipe 13 to connect the synchronous water glass pipeline.

[0030] like Figure 1 、 Figure 3As shown, the synchronous water glass pipeline includes a seamless steel pipe 10 arranged in a spare grouting pipe 13; the specific method is to first inject shield tail grease into the spare grouting pipe 13 of the shield tail 14, and then insert one end of the seamless steel pipe 10 into the spare grouting pipe 13 until it extends out of the shield tail set distance. In this embodiment, one end of the seamless steel pipe 10 is inserted into the spare grouting pipe 13 until it extends out of the shield tail. This is to allow the water glass to mix with the mortar behind the pipe segment 12 during the synchronous grouting and water glass, and prevent the water glass and mortar from quickly solidifying and blocking the pipe at the pipe mouth. The purpose of using shield tail grease is that the shield tail grease can not only prevent leakage of slurry and water, but also facilitate the replacement of steel pipes in the later stage. In this embodiment, the seamless steel pipe 10 adopts a DN14 seamless steel pipe with a length of 2.5 meters, which is long enough to allow one end to extend 0.5m from the shield tail and the other end is connected to the grouting hose 3.

[0031] like Figure 2 As shown, the other end of the seamless steel pipe 10 is welded and fixed with a flange 15 and a thread. The function of the flange is to fix the seamless steel pipe on the shield tail 14 with bolts. First, it seals to prevent water leakage, and second, it fixes to prevent movement and falling off. The thread is used to install the conversion joint 42. The seamless steel pipe 10 can be connected to the grouting hose 3 using the conversion joint 42. It can be understood that the conversion joint adopts existing technology and can connect pipes of different diameters or materials.

[0032] like Figure 1 As shown, the synchronous grouting pipe 9 of the shield machine is connected to the synchronous grouting pipeline, which includes a synchronous slurry storage tank 5. The synchronous slurry storage tank 5 contains cement mortar 11. It can be understood that a stirring paddle is provided in the synchronous slurry storage tank 5, which is driven by a motor and is used to stir the cement mortar in the synchronous slurry storage tank 5 to prevent it from segregating or solidifying.

[0033] like Figure 1 As shown, the synchronous grouting hose 7 connects the synchronous slurry storage tank 5 and the synchronous grouting pipe 9. The synchronous grouting hose 7 is provided with a synchronous grouting machine 6 for extracting mortar from the synchronous slurry storage tank 5, inputting it into the synchronous grouting pipe 9, and then sending it behind the pipe segment 12; between the synchronous grouting machine and the synchronous grouting pipe, the synchronous grouting hose 7 is also provided with a synchronous grouting ball valve 8 for adjusting the mortar flow rate and flow entering the synchronous grouting pipe 9.

[0034] like Figure 1 As shown, the synchronous water glass pipeline also includes a grouting hose 3, which is laid along the synchronous grouting pipeline of the shield machine and connected to the water glass barrel 1. The grouting hose 3 is provided with a secondary grouting machine 2 for extracting the water glass liquid from the water glass barrel and inputting it into the seamless steel pipe 10 through the grouting hose 3. Figure 1As shown, a ball valve 4 is installed on the grouting hose 3 between the secondary grouting machine and the seamless steel pipe, which is used to adjust the flow rate and flow of the water glass entering the seamless steel pipe 10; a one-way valve 41 is also provided on the grouting hose 3 between the ball valve 4 and the seamless steel pipe, which is used to prevent the liquid from flowing back into the water glass barrel and causing the water glass to solidify.

[0035] By setting ball valves on the synchronous grouting pipeline and the synchronous water glass pipeline to control the flow rate and flow of mortar and water glass, the mixing ratio of mortar and water glass can be adjusted to solve the problem of uncontrollable slurry solidification time.

[0036] It can be understood that the water glass barrel and the synchronous slurry storage tank are both arranged in the shield machine through corresponding support frames.

[0037] Working principle:

[0038] When the shield machine starts to advance, the synchronous grouting machine 6 works to inject cement mortar 11 into the back of the segment 12. When the shield machine advances 5-10 cm, the secondary grouting machine 2 is started and the water glass liquid 16 is injected into the back of the segment 12 through the seamless steel pipe 10.

[0039] Since the seamless steel pipe 10 extends 0.5m out of the shield tail, during the tunneling process of the shield machine, the water glass liquid reacts and solidifies with the cement mortar 11 behind the shield tail 0.5m away;

[0040] Stop injecting the water glass liquid 5-10cm before the end of the propulsion stroke, pull out the grouting hose from the water glass bucket, and connect it to the clean water bucket, and inject clean water into the water glass liquid injection pipeline to flush; during the downtime, start the secondary grouting machine for three to five seconds every one to two hours to prevent backflow and pipe blockage.

[0041] The device of the utility model can not only avoid the rapid solidification of water glass and cement mortar causing pipe blockage, but also accelerate the setting time of mortar to quickly stabilize the pipe segments, reducing problems such as pipe segment floating, misalignment and breakage.

[0042] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A synchronous grouting and water glass filling device for subway engineering, comprising a plurality of synchronous grouting pipes arranged at the tail of the shield, each synchronous grouting pipe being provided with a spare grouting pipe, characterized in that: The synchronous grouting pipe is connected to the synchronous grouting pipeline, and the spare grouting pipe is connected to the synchronous water glass pipeline; The synchronous water glass pipeline includes a seamless steel pipe arranged in a spare grouting pipe; The spare grouting pipe is firstly injected with shield tail grease, and then the seamless steel pipe is inserted, and one end of the seamless steel pipe extends out of the shield tail by a distance set outside.

2. A subway engineering synchronous grouting and water glass filling device as claimed in claim 1, characterized in that: The synchronous grouting pipeline includes a synchronous slurry storage tank, which is filled with cement mortar. The synchronous grouting hose connects the synchronous slurry storage tank and the synchronous grouting pipe, and a synchronous grouting machine is arranged on the synchronous grouting hose.

3. A subway engineering synchronous grouting and water glass filling device as claimed in claim 2, characterized in that: A synchronous grouting ball valve is also provided on the synchronous grouting hose between the synchronous grouting machine and the synchronous grouting pipe.

4. The synchronous grouting and water glass filling device for subway engineering according to claim 1, characterized in that: The synchronous water glass pipeline also includes a grouting hose, which is arranged along the synchronous grouting pipeline and connected to the water glass barrel. A secondary grouting machine is provided on the grouting hose.

5. The synchronous grouting and water glass filling device for subway engineering according to claim 4, characterized in that: The other end of the seamless steel pipe is welded and fixed with a flange and a thread, the flange is fixedly connected to the shield tail, and the thread is installed with a conversion joint; the seamless steel pipe is connected to the grouting hose through the conversion joint.

6. The synchronous grouting and water glass filling device for subway engineering according to claim 4, characterized in that: A ball valve is also installed on the grouting hose between the secondary grouting machine and the seamless steel pipe.

7. A subway engineering synchronous grouting and water glass filling device as claimed in claim 6, characterized in that: A one-way valve is also provided on the grouting hose between the ball valve and the seamless steel pipe.

Images