Grouting device for secondary grouting in subway tunnel shield construction

Abstract

The utility model provides a secondary grouting device for subway tunnel shield construction, which comprises a container body, the container body comprises a front pipe, a middle pipe and a rear pipe, the front pipe is connected with the middle pipe through a first screw head, the middle pipe is connected with the rear pipe through a second screw head, and the middle pipe is connected with the rear pipe through a second screw head. A pressure relief pipe and a water glass pipe are arranged on the pipe wall of the rear pipe, and the pressure relief pipe and the water glass pipe are symmetrically arranged on the two sides of the rear pipe. The container body is divided into the front pipe, the middle pipe and the rear pipe which are connected through the threaded heads, so that when the interior of the container body needs to be cleaned, the container body can be directly divided into a plurality of parts in a rotating mode, then the interior of the container body is cleaned, cleaning is convenient, and the container body can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a grouting device for secondary grouting in shield construction of a subway tunnel. Background Art

[0002] With the vigorous development of the national economy, cities across the country have begun to build subways, and the construction of subway sections is basically done by shield construction. As the shield tunnel construction technology becomes more mature, the quality specifications of subway tunnels are becoming more and more complete, and the supporting equipment shield machines are becoming more and more advanced. At the same time, more and more quality problems are emerging, especially in tunnel waterproofing, which should be treated as a key and difficult problem.

[0003] Secondary grouting on the back of the segment is an essential process after shield excavation, and the later grouting requires measures such as the special construction of a grouting platform, especially the opening and grouting on the top of the segment, which is not only unsafe but also difficult. Secondary grouting on the back of the segment during shield excavation can effectively reduce manpower and material costs, but during the secondary grouting process, it is easy to cause pipeline blockage, which makes cleaning more troublesome. Utility Model Content

[0004] The utility model provides a grouting device for secondary grouting in shield construction of subway tunnel, which is used to solve the defect that secondary grouting of the back of the pipe segment during the shield excavation process in the prior art can effectively reduce the manpower and material costs, but in the secondary grouting process, it is easy to cause pipeline blockage, resulting in troublesome cleaning.

[0005] To achieve the above purpose, the technical solution of the utility model is: a grouting device for secondary grouting in subway tunnel shield construction, comprising:

[0006] The container body comprises a front tube, a middle tube and a rear tube, the front tube is connected to the middle tube by a first thread head, the middle tube is connected to the rear tube by a second thread head, a pressure relief tube and a water glass tube are arranged on the tube wall of the rear tube, and the pressure relief tube and the water glass tube are symmetrically arranged on both sides of the rear tube.

[0007] Preferably, a first threaded portion is provided on the front tube, a second threaded portion is provided at one end of the middle tube, the first threaded portion and the second threaded portion are connected via the first thread head, a third threaded portion is provided at the other end of the middle tube, a fourth threaded portion is provided at one end of the rear tube, and the fourth threaded portion and the third threaded portion are connected via the second thread head.

[0008] Preferably, the front tube includes an expansion section and a reduction section, the expansion section has the same diameter as the middle tube and the rear tube, and the reduction section has a smaller diameter than the expansion section.

[0009] Preferably, a fifth threaded portion is provided on the reduction section.

[0010] Preferably, the diameter of the pressure relief pipe is smaller than the diameter of the water glass tube.

[0011] A pipe clamp is provided at one end of the rear pipe away from the fourth threaded portion.

[0012] Compared with the prior art, the utility model has the following beneficial effects: by splitting the container body into the front tube, the middle tube and the rear tube connected by the thread heads, when the inside of the container body needs to be cleaned, the container body can be directly split into multiple parts by rotating and then the inside can be cleaned, which makes cleaning convenient and the container body can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 The utility model is a schematic structural diagram of a grouting device for secondary grouting in shield construction of a subway tunnel.

[0015] Reference numerals:

[0016] 10. Container body; 11. Front tube; 111. First threaded portion; 112. Fifth threaded portion; 12. Middle tube; 121. Third threaded portion; 13. Rear tube; 131. Fourth threaded portion; 20. First thread head; 30. Second thread head; 40. Pressure relief tube; 50. Water glass tube; 60. Pipe clamp. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1As shown, an embodiment of the present application provides a grouting device for secondary grouting in shield construction of a subway tunnel, the grouting device includes a container body 10, the container body 10 includes a front tube 11, a middle tube 12 and a rear tube 13, the front tube 11 and the middle tube 12 are connected by a first thread head 20, and the middle tube 12 and the rear tube 13 are connected by a second thread head 30. Specifically, a first threaded portion 111 is provided on the front tube 11, a second threaded portion is provided at one end of the middle tube 12, the first threaded portion 111 and the second threaded portion are connected by the first thread head 20, a third threaded portion 121 is provided at the other end of the middle tube 12, a fourth threaded portion 131 is provided at one end of the rear tube 13, and the fourth threaded portion 131 and the third threaded portion 121 are connected by the second thread head 30.

[0019] In this way, the container body 10 is split into three parts and connected. When the inside of the container body 10 needs to be cleaned, the container body 10 can be directly split into multiple parts by rotating and then the inside is cleaned. The cleaning is convenient and the container body 10 can be reused. A pressure relief pipe 40 and a water glass tube 50 are provided on the tube wall of the rear tube 13, and the pressure relief pipe 40 and the water glass tube 50 are symmetrically arranged on both sides of the rear tube 13.

[0020] The water glass tube 50 (φ40) is connected to the rear tube 13 by welding, and the tube with a diameter of φ15 is reduced through a hole in the wall of the rear tube 13. The end of the tube is opened by grinding and slotting, so that a rubber ring can be added to the tube. The rubber ring wraps the hole opened on the tube, so that the mixing ratio of the double liquid slurry can be adjusted in time by adjusting the pressure of the material injected into the water glass tube 50. The rubber ring can also play an isolating effect between the single liquid slurry and the water glass material in a natural state. The pressure relief pipe 40 (φ20) is also connected to the rear tube 13 by hole welding, and then connected to the φ20 ball valve through a thread head to achieve a simple pressure relief effect. The rear part of the rear tube 13 is connected to the synchronous grouting pipe on the shield machine through a pipe clamp 60 (φ70). The front tube 11 includes an expansion section and a reduction section. The expansion section has the same diameter as the middle tube 12 and the rear tube 13, and the diameter of the reduction section is smaller than the diameter of the expansion section. The reduction section is provided with a fifth threaded portion 112. Specifically, the front part of the front pipe 11 is reduced in diameter from φ70 to φ32, connected to the φ32 ball valve and the grouting head on the pipe segment, and the container wall thickness is about 3-5 mm.

[0021] During the tunneling process of the shield machine, the synchronous grouting pipe at the bottom can be removed from the shield tail to connect the grouting device. The water glass solution can be stored in the water glass box on the shield machine trolley. The trolley can then be used to open holes at the locations where secondary grouting is required for the tunnel top segment. The shield machine's own platform height can be used to safely open holes for secondary grouting. The grouting head and the segment lifting hole are then tightened. A (φ32) ball valve is installed on the grouting head to timely block the grouting hole. The other end of the ball valve is connected to the front pipe 11 of the grouting device, and then the water glass tube 50 and the synchronous grouting pipe are connected to the rear pipe 13 in turn. Before starting grouting, pressurized water injection can be performed through the water glass tube 50 to check the sealing of the rubber sleeve. If any If the existing rubber sleeve is damaged or deformed, it needs to be replaced. Otherwise, during the grouting process, the contact between the cement slurry and the water glass will be lost and react, which may easily cause a series of problems caused by pipe blockage. During the grouting process, the grouting ratio can be adjusted through the shield machine operating room or manually adjusting the pressure gauge, or the mix ratio can be observed through the pressure relief pipe 40 and adjusted in time. During the grouting process, the grouting amount can be controlled by observing the misalignment of the pipe segments. After the grouting is completed, the synchronous grouting system is first turned off, the ball valve on the grouting head is closed, and the pressure relief hole on the pressure relief pipe 40 is opened to add water to flush the inside of the grouting device. If the flushing effect is not good, the grouting device can be directly split into multiple parts for internal cleaning, and the grouting device can be reused.

[0022] In order to ensure the effect of grouting and improve the waterproof quality of the pipe segment, holes can be opened in front and behind the pipe segment to verify whether the gap between the pipe segment and the rock formation is filled. Since the grouting device is light, more holes can be opened continuously to improve efficiency. Before each hole is filled, stop injecting water glass in advance, close the grouting ball valve and the synchronous grouting system, and directly remove the grouting device to connect to the next hole for grouting.

[0023] The size of the external interface of the grouting device of the utility model needs to be determined according to the diameters of the synchronous grouting pipe and the water glass pipe 50 of the shield machine. During the excavation process, secondary grouting is generally performed by opening holes at the top of the pipe segment for grouting.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A grouting device for secondary grouting in subway tunnel shield construction, characterized in that: include: The container body comprises a front tube, a middle tube and a rear tube, the front tube is connected to the middle tube by a first thread head, the middle tube is connected to the rear tube by a second thread head, a pressure relief tube and a water glass tube are arranged on the tube wall of the rear tube, and the pressure relief tube and the water glass tube are symmetrically arranged on both sides of the rear tube.

2. The grouting device for secondary grouting in subway tunnel shield construction according to claim 1 is characterized in that: The front tube is provided with a first threaded portion, one end of the middle tube is provided with a second threaded portion, the first threaded portion and the second threaded portion are connected via the first thread head, the other end of the middle tube is provided with a third threaded portion, one end of the rear tube is provided with a fourth threaded portion, the fourth threaded portion and the third threaded portion are connected via the second thread head.

3. The grouting device for secondary grouting in subway tunnel shield construction according to claim 2 is characterized in that: The front tube includes an expansion section and a reduction section. The expansion section has the same diameter as the middle tube and the rear tube, and the reduction section has a smaller diameter than the expansion section.

4. The grouting device for secondary grouting in subway tunnel shield construction according to claim 3 is characterized in that: The reduction section is provided with a fifth threaded portion.

5. The grouting device for secondary grouting in subway tunnel shield construction according to any one of claims 1 to 4, characterized in that: The diameter of the pressure relief pipe is smaller than the diameter of the water glass tube.

6. The grouting device for secondary grouting in subway tunnel shield construction according to any one of claims 2 to 4, characterized in that: A pipe clamp is provided at one end of the rear pipe away from the fourth threaded portion.

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