TWI784775B - The second backfill grouting structure for the protection of underground engineering shield tunnel buildings - Google Patents

Abstract

The present invention relates to a second backfill grouting structure for protection of shield tunnels in underground engineering, wherein a plurality of rings are used to surround the excavated space of the tunnel into a tubular working space, and at least one check valve is arranged on at least one of the rings , which includes a ring body, a partition in the center of the ring body that separates the two penetration areas, and two one-way opening pieces that respectively cover each penetration area. , the first injection pipe and the second injection pipe, the first injection pipe and the second injection pipe are jointly connected with the main pipe to define the mixing area, the main pipe is enough to pass through one of the piercing areas and push the one-way opening piece, And the front end of the main pipe is equipped with a drill bit and a discharge port is formed on the side of the front end. The main pipe directly passes through the piercing area without damaging the partition and each one-way opening piece in the check valve. At the same time, it can pass through the mixing area to allow The cement slurry and sodium silicate are mixed and then output from the discharge port, so as to accurately grasp the solidification time after mixing.

Description

The second backfill grouting structure for the protection of underground engineering shield tunnel buildings

The invention relates to a back-filling grouting structure, in particular to a second back-filling grouting structure for protection of underground shield tunnel buildings.

By the way, shield tunneling is a method of constructing tunnels, which is suitable for tunneling in soft soil strata or strata with high water content. Among them, the shield machine is the protective structure of the boring machine used to protect the stable formation, and the material is made of concrete, cast iron or steel. In fact, the shield provides temporary support for the tunnel boring machine when it is working. The shield machine is mainly composed of a batch plate, a batch tool, a jack, a ring piece, a hydraulically driven motor, a control room and a screw mud discharger, and the ring piece is mainly used to support the pressure of the soil layer and the water pressure. Rings usually consist of multiple rings (at least six) to form a circle of tunnels. A check valve needs to be buried in the rings. This check valve is mainly used for grouting the outside of the tunnel after the grouting pipe is pierced. It is currently used for piercing The diameter of the grouting pipe of the check valve is roughly the same as that of the check valve. Since the check valve mainly includes the ring body and the partition plate located in the center of the ring body to separate the two penetration areas and two one-way opening pieces that respectively block the penetration areas, When the grouting pipe is inserted into the check valve, the partition and the one-way opening piece must be destroyed. After the grouting is completed, the control valve body on the grouting pipe must be retained. The control valve body can mainly block the unsolidified mud or mud outside the tunnel. Infiltration of sand or groundwater. However, the control valve body cannot know whether the mud is solidified or whether there is sediment or groundwater seeping in. Therefore, when the operator takes over the shift or does not know the specific situation and removes the control valve body, Then it is very likely that unsolidified mud or tunnel outer silt or groundwater will be ejected from the grouting pipe, and a pity will happen.

The detailed features and advantages of the present invention are described in detail below in the implementation mode, and its content is enough to make any person familiar with the related art understand the technical content of the present invention and implement it accordingly, and according to the content disclosed in this specification, the scope of the patent application and the drawings , anyone skilled in the art can easily understand the purpose and advantages of the present invention.

The main purpose of the present invention is: through the direct passage of the main pipe through the piercing area without damaging the partitions and the one-way opening pieces in the check valve, at the same time, the cement slurry and sodium silicate can be mixed through the mixing area It is output from the discharge port to accurately grasp the solidification time after mixing.

In order to achieve the above-mentioned purpose, the present invention is a second backfill grouting structure for the protection of underground shield tunnel buildings, in which a plurality of rings are used to surround the space where the tunnel excavation has been completed into a tubular working space, and at least one of the rings At least one non-return valve is provided on the sheet, and the non-return valve includes a ring body, a partition located in the center of the ring body to separate the two penetration areas, and two one-way opening pieces that respectively block each of the penetration areas, and the one-way opening piece faces Turning away from the direction of the tubular working space, the check valve is used for a grouting pipe to pass through, and it is characterized in that: the grouting pipe includes a main pipe, a first injection pipe and a second injection pipe, wherein the main pipe is sufficient to pass through it One of the piercing area and push the one-way opening piece, the first injection pipe and the second injection pipe are jointly connected with the main pipe to define a mixing area, the front end of the main pipe is provided with a drill bit and formed on the side of the front end One outlet.

According to an embodiment of the present invention, wherein the main pipe includes a first pipe with the first injection pipe, the second injection pipe and the mixing area, and a second pipe with the drill bit at the front end, the second The tube is connected and locked with the first tube.

According to an embodiment of the present invention, it further includes a power rotating shaft, which is connected to the second pipe to enable the drill bit to perform wall drilling, and then disconnected from the first pipe.

According to an embodiment of the present invention, wherein the first injection pipe is used for injecting cement slurry, the cement slurry components include: Portland cement, bentonite, stabilizer and water.

According to an embodiment of the present invention, the first injection pipe is sleeved with a first control valve.

According to an embodiment of the present invention, the second injection pipe is used for injecting sodium silicate.

According to an embodiment of the present invention, the second injection pipe is sleeved with a second control valve.

According to an embodiment of the present invention, the diameter of the drill bit is not larger than the planar area of the one-way opening piece.

The implementation of the present invention will be described by specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

The structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for the understanding and reading of those who are familiar with this technology, and are not used to limit the implementation of the present invention Conditions, so it has no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "a", "two", and "upper" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. Changes in their relative relationships or Adjustment, without substantive changes in technical content, should also be regarded as the scope of implementation of the present invention.

Please refer to Fig. 1 and Fig. 2, which are the three-dimensional schematic diagram of the preferred embodiment of the present invention and the structural schematic diagram of the tubular working space and the installation position of the check valve. The present invention is a second backfill grouting structure for protection of shield tunnels in underground engineering, in which a plurality of rings 1 are used to surround the space that has been excavated into a tubular working space 10, and at least one of the rings 1 is provided with at least one The non-return valve 2, the non-return valve 2 includes a ring body 20, a partition 21 located in the center of the ring body 20 to separate the two piercing areas 22, and two one-way opening pieces 23 that block each piercing area 22 respectively, the one-way opening piece 23 Turning away from the direction of the tubular working space 10, the check valve 2 is used for a grouting pipe 3 to pass through, wherein the grouting pipe 3 includes a main pipe 30, a first injection pipe 31 and a second injection pipe 32, wherein the main pipe 30 is sufficient to pass through it One passes through the area 22 and promotes the one-way opening piece 23. The first injection pipe 31 and the second injection pipe 32 are jointly connected with the main pipe 30 to define a mixing area 33. The front end of the main pipe 30 is provided with a drill bit 34 and on the front end side A discharge port 35 is formed on the side. The aforementioned tubular working space 10 is mainly a place where workers and all working tools can work.

Wherein the main pipe 30 comprises a first pipe 300 with a first injection pipe 31, a second injection pipe 32 and a mixing zone 33 and a second pipe 302 with a drill bit 34 arranged at the front end, the second pipe 302 and the first pipe 300 Connected and locked. In addition, the second pipe 302 can also replace and lock the power shaft 4 (refer to FIG. 3 ) so that the drill bit 34 can drill the wall (that is, the first backfill grouting adjacent to each ring piece 1 ) construction, and then disconnect the connection with the first pipe. 300.

The aforementioned first injection pipe 31 is socketed with a first control valve 5, and the first injection pipe 31 is mainly used for injecting cement slurry, and the cement slurry components include: Portland cement, bentonite, stabilizer and water. In addition, the second injection pipe 32 is socketed with a second control valve 6 , and the second injection pipe 32 is used for injecting sodium silicate. The cement slurry and sodium silicate are located in the mixing area 33 after the mixing is completed, and then output to the second backfill grouting area 7 to be grouted by the discharge port 35 (that is, the second backfill grouting area outside the tubular working space 10). filling grout).

In addition, the diameter of the drill bit 34 is not larger than the plane area of the one-way opening piece 23, so as to prevent the drill bit 34 from hitting the partition 21 when the main pipe 30 passes through the piercing area 22 and pushes the one-way opening piece 23.

Referring to Figure 3 and Figure 4 together, it is a schematic diagram of the use state of the power shaft combined with the second pipe passing through the check valve and a schematic diagram of the use state of the second pipe after positioning and replacing the first pipe for grouting according to the present invention. It can be seen from Fig. 3 that the main pipe 30 is mainly divided into a first pipe 300 and a second pipe 302. When the second pipe 302 with the drill bit 34 passes through the check valve 2, the diameter of the drill bit 34 is not larger than that of the one-way opening piece 23. planar area, so the drill bit 34 will not bump into the partition 21 next to it when it pushes against the one-way opening piece 23, and then the wall can be drilled after the one-way opening piece 23 is pushed away, because the second pipe 302 is connected with a Lock the power shaft 4, the end of the power shaft 4 is provided with a connector 40, the connector 40 is mainly used for connecting and giving power to pneumatic tools or any power tools with power, so that the power shaft 4 rotates and drives the drill bit at the front end of the second pipe 302 34 pairs of wall drilling, after the wall drilling operation is completed, it also means that the second pipe 302 goes deep into the space that needs to be grouted. At this time, it can be seen from Figure 4 that when the second pipe 302 is separated from the power shaft 4, the first pipe 300 Connect the second pipe 302, because the first pipe 300 is connected with the first injection pipe 31 and the second injection pipe 32, wherein the first pipe 300 and the first injection pipe 31 and the second injection pipe 32 define There is a mixing area 33, in which the first injection pipe 31 is socketed with the first control valve 5, and the second injection pipe 32 is socketed with the second control valve 6, through which the first control valve 5 and the second control valve 6 can respectively inject Cement slurry and sodium silicate (referred to as water glass), and located in the mixing area 33 to complete the mixing, and then output from the outlet 35 to the second backfill grouting area 7 to be grouted (that is, located between the tubular working space 10 Outside), to more accurately grasp the solidification time after mixing. Moreover, the first pipe 300 in the main pipe 30 directly passes through the piercing area without damaging the partition 21 and the one-way opening pieces 23 in the check valve, so when the first pipe 300 is pulled away, the one-way opening pieces 23 can still return to its original position, so as to block the input mixed slurry and avoid flowing out.

The above-mentioned embodiments are only illustrative to illustrate the principles and effects of the present invention, and are not intended to limit the present invention. Anyone skilled in the art can modify the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be listed as the scope of patent application mentioned later.

1: ring piece 10: Tubular working space 2: check valve 20: ring body 21: Partition 22: Wearing area 23: One-way opening piece 3: grouting pipe 30: supervisor 300: first tube 302: second pipe 31: The first injection pipe 32: Second injection pipe 33: Mixing area 34: Drill bit 35: Outlet 4: Power shaft 40: connector 5: The first control valve 6: Second control valve 7: The second backfill grouting area

Fig. 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2 is a schematic diagram of the structure of the present invention in the tubular working space and the installation position of the check valve.

Fig. 3 is a schematic diagram of the use state of the power shaft combined with the second pipe passing through the check valve of the present invention.

Fig. 4 is a schematic diagram of the use state of the present invention in which the positioning of the second pipe is completed and the first pipe is replaced for grouting.

2: check valve

20: ring body

21: Partition

22: Wearing area

23: One-way opening piece

3: grouting pipe

30: supervisor

300: first tube

302: second pipe

31: The first injection pipe

32: Second injection pipe

33: Mixing area

34: Drill bit

35: Outlet

5: The first control valve

6: Second control valve

Claims (8)

A second backfill grouting structure for the protection of shield tunnels in underground engineering, wherein a plurality of rings are used to surround the space where the tunnel excavation has been completed into a tubular working space, and at least one non-return valve is set on at least one of the rings, The non-return valve comprises a ring body, a partition at the center of the ring body that separates the two piercing areas, and two one-way opening pieces that respectively shield the piercing areas. The one-way opening pieces are turned away from the tubular working space, The check valve is used for a grouting pipe to pass through, and it is characterized in that: the grouting pipe includes a main pipe, a first injection pipe and a second injection pipe, wherein the main pipe is sufficient to pass through one of the piercing areas and push The one-way opening piece, the first injection pipe and the second injection pipe are jointly connected with the main pipe to define a mixing area, and a drill bit is arranged at the front end of the main pipe and a discharge port is formed on the side of the front end. The second backfill grouting structure for the protection of the underground engineering shield tunnel building as described in claim 1, wherein the main pipe includes a first pipe with the first injection pipe, the second injection pipe and the mixing area And a second pipe of the drill bit is arranged at the front end, and the second pipe is connected and locked with the first pipe. The second backfill grouting structure for protection of underground engineering shield tunnel construction as described in claim 2 further includes a power rotating shaft, which connects the second pipe to enable the drill bit to perform wall drilling construction, and then disconnects from the first pipe. . The second backfill grouting structure for protection of underground engineering shield tunnel building protection as described in claim 1, wherein the first injection pipe is used to inject cement slurry, and the cement slurry components include: Portland cement, bentonite, stabilizer and water. The second backfill grouting structure for protection of underground engineering shield tunnel buildings as described in claim 4, wherein the first injection pipe is sleeved with a first control valve. The second backfill grouting structure of the shield tunnel construction protection of the underground engineering described in Claim 1, wherein the second injection pipe is used for injecting sodium silicate. The second backfill grouting structure for protection of underground engineering shield tunnel buildings as described in Claim 6, wherein the second injection pipe is sleeved with a second control valve. The second backfill grouting structure for protection of underground engineering shield tunnel construction as described in claim 1, wherein the diameter of the drill bit is not larger than the plane area of the one-way opening piece.

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