Structure for tunnel double-liquid mixed grouting and using method thereof

Abstract

The invention relates to the field of tunnel construction engineering, in particular to a structure for tunnel double-liquid mixed grouting and a using method of the structure. Comprising a mixing pipe, the input end of the mixing pipe is connected with an input pipe of first liquid, and the output end of the mixing pipe is inserted into a soil body to be grouted; the floral tube is arranged in the mixing tube; a plurality of through holes are uniformly formed in the floral tube; the connecting pipe is arranged on the mixing pipe, the inner end of the connecting pipe is arranged in the mixing pipe and is communicated with the first end part of the floral pipe, and the outer end of the connecting pipe extends out of the mixing pipe and is connected with an input pipe of second liquid. The liquid mixing device has the beneficial effects that by utilizing the floral tube uniformly provided with the through holes and the connector, second liquid enters the floral tube through the connector and is uniformly sprayed into the mixing tube through the through holes in the floral tube, so that the second liquid and first liquid in the mixing tube are fully mixed.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction engineering, in particular to a structure for double-liquid mixed grouting in a tunnel and a use method thereof. Background Art

[0002] Generally, after the shield passes through the building, there will be a certain degree of ground settlement. In severe cases, it will cause risks such as building tilt, structural instability, and wall cracking. The main measure is to use the grouting holes of the pipe segment for secondary grouting to reduce ground settlement. Secondary grouting double-liquid grouting generally uses cement slurry and water glass mixed in a certain proportion and injected into the soil through the grouting holes of the pipe segment. The two solutions react quickly to form a consolidation body with a certain strength, which can fill the gap in time and enhance the strength and bearing capacity of the soil. Conventional double-liquid grouting uses a single tube of cement slurry and a single tube of water glass to be combined into a single tube through a three-way valve for pressure injection. This single-tube pressure injection method will cause the cement slurry to be unable to be fully mixed with the water glass, so that part of the cement slurry does not contact with the water glass and is directly injected into the soil. The diffusion range of the single-liquid slurry is large, the grouting is uncontrollable, and the slurry solidification time is long, resulting in the grouting effect not meeting the construction requirements; although the other part of the cement slurry is in contact with the water glass, the contact range is limited and cannot be fully integrated, resulting in a slow increase in slurry strength and unsatisfactory grouting (indicator stability) effect.

[0003] Therefore, the present invention provides a structure for double-liquid mixed grouting in a tunnel and a method for using the structure. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a structure for double-liquid mixed grouting in a tunnel and a method of using the structure and a method of using the structure to solve the problem that the existing grouting structure causes the liquids to not be fully mixed.

[0005] The present invention provides a structure for double-liquid mixed grouting in a tunnel, and its technical solution is as follows: it comprises: a mixing tube, the input end of the mixing tube is connected to the input tube of the first liquid, and the output end of the mixing tube is inserted into the soil to be grouted; a flower tube arranged in the mixing tube, and a plurality of through holes are evenly opened on the flower tube; a connecting tube arranged on the mixing tube, the inner end of the connecting tube is in the mixing tube and communicated with the first end of the flower tube, and the outer end extends to the outside of the mixing tube and is connected to the input tube of the second liquid.

[0006] Furthermore, the through holes on the flower tube are evenly distributed in a circle around the central axis of the flower tube and are provided in multiple circles, and the through holes in adjacent circles are staggered.

[0007] Furthermore, the flower tube and the mixing tube are on the same axis.

[0008] Furthermore, a bending portion is provided at the first end of the flower tube, and the bending portion is connected to the connecting tube.

[0009] Furthermore, a sealing ring is sleeved on the connecting pipe, and the sealing ring is located at the connection between the connecting pipe and the mixing pipe.

[0010] Furthermore, a one-way valve is provided at one end of the connecting pipe away from the floral pipe.

[0011] Furthermore, the hydraulic pressure in the flower tube is greater than the hydraulic pressure in the mixing tube.

[0012] The present invention also provides a method for using the structure for double-liquid mixed grouting in a tunnel, and the specific steps are as follows: inserting the output end of the mixing tube into the soil to be grouted, connecting the input end of the mixing tube with the input pipe of the first liquid; connecting the input end of the connecting tube with the input pipe of the second liquid; opening the input pipes of the first liquid and the second liquid; the second liquid enters the flower tube and enters the mixing tube through the through hole to mix with the first liquid; the mixed liquid enters the soil to be grouted through the output end of the mixing tube.

[0013] Furthermore, the hydraulic pressure in the flower tube is greater than the hydraulic pressure in the mixing tube, and the second liquid in the flower tube is ejected from the through hole, quickly enters the mixing tube and mixes with the first liquid.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By using a flower tube with evenly opened through holes and a connector, the second liquid enters the flower tube through the connector and is evenly sprayed into the mixing tube through the through holes on the flower tube, so that the second liquid and the first liquid in the mixing tube are fully mixed.

[0016] By arranging the flower tube and the mixing tube on the same axis, the through hole on the flower tube can evenly spray the second liquid into the mixing tube, thereby achieving the purpose of even mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the structure of the present invention used for double-liquid mixed grouting in tunnels.

[0018] Figure 2 It is an overall schematic diagram of the structure of the present invention used for double-liquid mixed grouting in tunnels.

[0019] Figure 3 It is a schematic diagram of the connecting pipe structure used for double-liquid mixed grouting in tunnels according to the present invention.

[0020] Figure 4It is a schematic diagram of a flower tube structure used for double-liquid mixed grouting in tunnels according to the present invention.

[0021] Legend: 1. Flower tube; 2. Mixing tube; 3. Sealing ring; 4. One-way valve; 5. Connecting pipe; 6. Thread; 7. Through hole. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] See also Figure 1 The present invention provides a structure for double-liquid mixed grouting in a tunnel and a method for using the structure, which solves the problem that the existing grouting structure causes the liquids to not be fully mixed. By using a flower tube with evenly opened through holes and a connector, the second liquid enters the flower tube through the connector and is evenly sprayed into the mixing tube through the through holes on the flower tube, so that the second liquid and the first liquid in the mixing tube are fully mixed. By arranging the flower tube and the mixing tube on the same axis, the through holes on the flower tube can evenly spray the second liquid into the mixing tube, thereby achieving the purpose of even mixing.

[0024] The structure and use method of the present invention for double-liquid mixed grouting in tunnels are described below in conjunction with the accompanying drawings.

[0025] See also Figure 1 , showing a cross-sectional view of the structure of the present invention for double-liquid mixed grouting in tunnels. Figure 2 , showing the overall schematic diagram of the structure of the present invention for double liquid mixed grouting in tunnels. Figure 1 and Figure 2 , a structure for double-liquid mixed grouting in tunnels and a method of using the same are described in the present invention.

[0026] like Figure 1 and Figure 2 As shown, a structure for double-liquid mixed grouting in a tunnel of the present invention comprises: a mixing tube 2, the input end of the mixing tube 2 is connected to the input pipe of the first liquid, and the output end of the mixing tube 2 is inserted into the soil to be grouted; a flower tube 1 arranged in the mixing tube 2, and a plurality of through holes 7 are evenly opened on the flower tube 1; a connecting tube 5 is arranged on the mixing tube 2, the inner end of the connecting tube 5 is in the mixing tube 2 and communicated with the first end of the flower tube 1, and the outer end extends to the outside of the mixing tube 2 and is connected to the input pipe of the second liquid.

[0027] In a preferred embodiment, the first liquid is water glass, and the second liquid is cement slurry.

[0028] In a specific embodiment, the through holes 7 on the floral tube 1 are evenly distributed in one circle around the central axis of the floral tube 1 and are provided with multiple circles, and the through holes 7 in adjacent circles are staggered. By staggering the through holes 7 in adjacent circles, the second liquid can be more evenly mixed with the first liquid in the mixing tube 2 after being ejected from the through holes 7.

[0029] In a specific embodiment, the length of the flower tube 1 is smaller than the length of the mixing tube 2 , and the connecting tube 5 is located close to the input end of the mixing tube 2 .

[0030] In a specific embodiment, the through hole 7 and the floral tube 1 are vertically arranged. By vertically arranging the through hole 7 and the floral tube 1 , the second liquid in the floral tube 1 is vertically ejected and enters the mixing tube 2 .

[0031] In a specific embodiment, a sealing plug is fixedly provided at the second end of the floral tube 1. By providing the sealing plug, the second liquid in the floral tube 1 can only flow out through the through hole 7, so that the second liquid is evenly mixed with the first liquid in the mixing tube 2.

[0032] In a specific embodiment, the flower tube 1 is coaxial with the mixing tube 2. By arranging the flower tube 1 and the mixing tube 2 on the same axis, the second liquid in the flower tube 2 can enter the mixing tube 2 evenly, thereby increasing the mixing effect.

[0033] In a specific embodiment, the first end of the floral tube 1 is provided with a bent portion, and the bent portion is connected to the connecting tube 5 .

[0034] In a specific embodiment, a sealing ring 3 is sleeved on the connecting pipe 5, and the sealing ring 3 is located at the connection between the connecting pipe 5 and the mixing pipe 2. By providing the sealing ring 3, leakage of liquid can be prevented at the connection between the connecting pipe 5 and the mixing pipe 2.

[0035] In a specific embodiment, a one-way valve 4 is provided at one end of the connecting pipe 5 away from the floral tube 1. By providing the one-way valve 4, the second liquid in the floral tube 1 can be prevented from flowing back.

[0036] In a specific embodiment, threads 6 are provided on the outer surfaces of both ends of the mixing tube 2. By providing the threads 6, the input end of the mixing tube 2 can be connected to the input pipeline of the first liquid.

[0037] In a specific embodiment, the hydraulic pressure in the floral tube 1 is greater than the hydraulic pressure in the mixing tube 2. By setting the hydraulic pressure in the floral tube 1 to be greater than the hydraulic pressure in the mixing tube 2, the second liquid can enter the mixing tube 2 from the floral tube 1.

[0038] The present invention also provides a method for using the structure for double-liquid mixed grouting in a tunnel, and the specific steps are as follows: inserting the output end of the mixing tube 2 into the soil to be grouted, and connecting the input end of the mixing tube 2 to the input pipe of the first liquid; connecting the input end of the connecting tube 5 to the input pipe of the second liquid; opening the input pipes of the first liquid and the second liquid; the second liquid enters the flower tube 1, and enters the mixing tube 2 through the through hole 7 to mix with the first liquid; the mixed liquid enters the soil to be grouted through the output end of the mixing tube 2.

[0039] In a specific embodiment, the hydraulic pressure in the floral tube 1 is greater than the hydraulic pressure in the mixing tube 2, and the second liquid in the floral tube 1 is ejected from the through hole 7, quickly enters the mixing tube 2 and mixes with the first liquid.

[0040] The following is a detailed description of the use of a structure for double-liquid mixed grouting in a tunnel according to the present invention.

[0041] The output end of the mixing tube 2 is inserted into the soil to be grouted, the pipeline of the first liquid is connected to the input end of the mixing tube 2, and the pipeline of the second liquid is connected to the one-way valve 4.

[0042] The pipeline of the first liquid and the pipeline of the second liquid are opened, and the first liquid is introduced into the mixing tube 2 by using a water pump, and the second liquid is introduced into the flower tube 1 through the one-way valve 4 and the connector 5. The hydraulic pressure in the flower tube 1 is greater than the hydraulic pressure in the mixing tube 2, so that the second liquid in the flower tube 1 is sprayed into the mixing tube 2, so that the second liquid flows quickly and is fully mixed with the first liquid in the mixing tube 2, and then the fully mixed liquid is injected into the soil from the output end of the mixing tube 2.

[0043] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A structure for double-liquid mixed grouting in a tunnel, characterized in that: include: A mixing tube (2), the input end of the mixing tube (2) being connected to the input pipe of the first liquid, and the output end of the mixing tube (2) being inserted into the soil to be grouting; A flower tube (1) is arranged in the mixing tube (2), wherein a plurality of through holes (7) are evenly formed on the flower tube (1); A connecting tube (5) is arranged on the mixing tube (2), wherein the inner end of the connecting tube (5) is inside the mixing tube (2) and communicates with the first end of the flower tube (1), and the outer end extends to the outside of the mixing tube (2) and is connected to the input tube of the second liquid.

2. The structure for double-liquid mixed grouting in tunnel according to claim 1, characterized in that: The through holes (7) on the flower tube (1) are evenly distributed in a circle around the central axis of the flower tube (1) and are provided with multiple circles, and the through holes (7) in adjacent circles are staggered.

3. The structure for double-liquid mixed grouting in tunnel according to claim 1, characterized in that: The flower tube (1) and the mixing tube (2) are on the same axis.

4. The structure for double-liquid mixed grouting in tunnel according to claim 1, characterized in that: The first end of the flower tube (1) is provided with a bent portion, and the bent portion is connected to the connecting tube (5).

5. The structure for double-liquid mixed grouting in tunnel according to claim 1, characterized in that: The connecting pipe (5) is sleeved with a sealing ring (3), and the sealing ring (3) is located at the connection between the connecting pipe (5) and the mixing pipe (2).

6. The structure for double-liquid mixed grouting in tunnel according to claim 1, characterized in that: A one-way valve (4) is provided at one end of the connecting pipe (5) away from the floral pipe (1).

7. The structure for double-liquid mixed grouting in tunnels according to claim 1, characterized in that: The hydraulic pressure in the flower tube (1) is greater than the hydraulic pressure in the mixing tube (2).

8. A method for using the structure for double-liquid mixed grouting in a tunnel according to claim 1, characterized in that: The specific steps are as follows: Inserting the output end of the mixing tube (2) into the soil to be grouting, and connecting the input end of the mixing tube (2) to the input pipe of the first liquid; Connecting the input end of the connecting tube (5) to the input tube of the second liquid; Opening the input pipes of the first liquid and the second liquid; The second liquid enters the floral tube (1) and enters the mixing tube (2) through the through hole (7) to mix with the first liquid; The mixed liquid enters the soil to be grouted through the output end of the mixing pipe (2).

9. The method for using the structure for double-liquid mixed grouting in a tunnel according to claim 8, characterized in that: The hydraulic pressure in the flower tube (1) is greater than the hydraulic pressure in the mixing tube (2), and the second liquid in the flower tube (1) is ejected from the through hole (7), quickly enters the mixing tube (2) and mixes with the first liquid.

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