A counterweight structure for preventing pipe segments from floating in a transoceanic water-rich formation

Abstract

The utility model relates to a shield technology field, concretely is a kind of over-sea water-rich stratum prevents the counterweight structure of segment floating, including segment, the surface of segment is equipped with connecting groove, the inner wall of segment is equipped with connecting pipe, the inboard of connecting groove is equipped with grouting opening, the surface passway of grouting opening is connected with counterweight bin, the outer surface of grouting opening is equipped with connecting cap by thread sleeve joint.The utility model is injected through connecting pipe's accelerator, accelerates the solidification efficiency of grouting fluid, under the connection of counterweight bin and grouting opening, by the effect of counterweight bin, it is convenient to grout in counterweight bin, reach the counterweight effect to segment, and further reach the configuration operation of segment floating, by the effect of ball, control ball's position in connecting cap, reach the effect of grouting anti-reflux, and the thread connection of connecting cap and grouting opening, it is convenient to replace the operation of its connecting cap whole on grouting opening.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine technology, specifically a counterweight structure for preventing tunnel segments from floating in water-rich strata across the sea. Background Technology

[0002] During the shield tunneling construction in water-rich strata across the sea, the high water content and soft soil of the strata make it easy for the segments to float upwards during assembly and placement of supports, causing the segment posture to exceed the specifications. When using traditional grouting methods for fixing, the grout solidification time is long, making it impossible to quickly control the upward floating posture of the segments. Utility Model Content

[0003] The purpose of this invention is to provide a counterweight structure for preventing tunnel segments from floating in water-rich strata across the sea, in order to solve the problem mentioned in the background art that when the traditional grouting method is used for fixing, the grout solidification time is long and it is impossible to quickly control the floating posture of the tunnel segments.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a counterweight structure for preventing tunnel segments from floating in water-rich strata across the sea, comprising tunnel segments, a connecting groove formed on the surface of the tunnel segments, a connecting pipe provided on the inner wall of the tunnel segments, a grouting port provided on the inner side of the connecting groove, a counterweight chamber connected to the surface of the grouting port, a connecting cap threaded onto the outer surface of the grouting port, a sealing ring fixedly connected to the outer surface of the connecting cap, a support plate fixedly connected inside the connecting cap, a support column fixedly connected to the surface of the support plate, a support sleeve fitted onto the outer surface of the support column, a telescopic spring fixedly connected to the inner side of the support sleeve, and a ball bearing fixedly connected to the surface of the support sleeve.

[0005] Preferably, the counterweight chamber is fitted onto the outer surface of the tube segment, the interior of the counterweight chamber is hollow, and the initial state of the counterweight chamber is a thin film attached to the outer surface of the tube segment.

[0006] Preferably, the counterweight bins and the segments are of equal number, and the connecting pipes and segments are connected by a passageway.

[0007] Preferably, the grouting port penetrates the surface of the segment through the connecting groove, and the connecting cap acts inside the connecting groove through the grouting port.

[0008] Preferably, the upper part of the connecting cap is conical in shape, and the sealing ring is annular in shape and fixed to the outer surface of the connecting cap.

[0009] Preferably, the ball abuts against the inner wall of the connecting cap through a support sleeve and a support column, and the support column is elastically slidably connected to the support sleeve through a telescopic spring.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. By connecting the segments and the connecting pipe, and with the cooperation of the connecting pipe and the grouting channel on the tunnel boring machine, the quick-setting agent injected through the connecting pipe accelerates the solidification efficiency of the grouting liquid. With the connection between the counterweight chamber and the grouting port, the counterweight chamber facilitates grouting into the counterweight chamber, achieving the counterweight effect on the segments, and thus achieving the configuration operation of floating the segments.

[0011] 2. By connecting the grouting port and the connecting cap, and with the connection of the connecting cap and the sealing ring, the sealing performance and connection range of the grouting pipe and the grouting port are improved. By connecting the support plate and the support column, and with the connection of the support column and the telescopic spring, the elastic sliding effect of the support sleeve on the support column is achieved. With the connection of the support sleeve and the ball bearing, the position of the ball bearing inside the connecting cap is controlled by the action of the ball bearing, achieving the effect of preventing backflow of grouting. Moreover, the threaded connection between the connecting cap and the grouting port facilitates the replacement of the entire connecting cap on the grouting port. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional front view of the structure of this utility model; Figure 3 This is a partial three-dimensional sectional view of the structure of this utility model; Figure 4 This utility model Figure 3 Partial sectional three-dimensional schematic diagram of the connection structure between the central tube segment and the counterweight bin; Figure 5 This utility model Figure 4 Partial sectional exploded three-dimensional schematic diagram of the connection structure between the grouting port and the connecting cap; Figure 6 This utility model Figure 5 A magnified structural diagram of point A in the middle.

[0013] In the diagram: 1. Segment; 2. Counterweight chamber; 21. Connecting groove; 22. Grouting port; 3. Connecting pipe; 4. Connecting cap; 41. Sealing ring; 42. Abutment ball; 43. Support plate; 44. Support column; 45. Telescopic spring; 46. Support sleeve. Detailed Implementation

[0014] Please see Figure 1-6 One embodiment provided by this utility model: A counterweight structure for preventing tunnel segments from floating in water-rich strata across the sea includes a tunnel segment 1. A connecting groove 21 is formed on the surface of the tunnel segment 1. A connecting pipe 3 is provided on the inner wall of the tunnel segment 1. A grouting port 22 is provided on the inner side of the connecting groove 21. A counterweight chamber 2 is connected to the surface of the grouting port 22. A connecting cap 4 is threaded onto the outer surface of the grouting port 22. A sealing ring 41 is fixedly connected to the outer surface of the connecting cap 4. A support plate 43 is fixedly connected inside the connecting cap 4. A support column 44 is fixedly connected to the surface of the support plate 43. A support sleeve 46 is sleeved on the outer surface of the support column 44. A telescopic spring 45 is fixedly connected to the inner side of the support sleeve 46. A ball bearing 42 is fixedly connected to the surface of the support sleeve 46. Through the connection between the tunnel segment 1 and the connecting pipe 3, the quick-setting agent between the tunnel segment 1 and the tunnel tunnel is conveniently injected under the action of the connecting pipe 3.

[0015] Furthermore, the counterweight chamber 2 is fitted onto the outer surface of the segment 1. The interior of the counterweight chamber 2 is hollow. Initially, the counterweight chamber 2 is attached to the outer surface of the segment 1 in a thin film form. Through the connection between the counterweight chamber 2 and the segment 1, the counterweight operation of the segment 1 is completed by injecting grout into the counterweight chamber 2 under the action of the counterweight chamber 2.

[0016] Furthermore, the counterweight chambers 2 and the segments 1 are of the same number, and the connecting pipes 3 and segments 1 are connected. Through the cooperative use of the counterweight chambers 2 and segments 1, the counterweight chambers 2 are also assembled when segments 1 are being assembled.

[0017] Furthermore, the grouting port 22 penetrates the surface of the segment 1 through the connecting groove 21, and the connecting cap 4 acts inside the connecting groove 21 through the grouting port 22. It is connected to the counterweight chamber 2 through the passage of the grouting port 22, and the grouting operation into the counterweight chamber 2 is convenient under the action of the grouting port 22.

[0018] Furthermore, the upper part of the connecting cap 4 is conical in shape, and the sealing ring 41 is annularly fitted and fixed on the outer surface of the connecting cap 4. Through the threaded connection between the connecting cap 4 and the grouting port 22, the sealing performance and range of the connection between the grouting pipe and the grouting port 22 are improved.

[0019] Furthermore, the ball 42 abuts against the inner wall of the connecting cap 4 through the support sleeve 46 and the support column 44. The support column 44 is elastically slidably connected to the support sleeve 46 through the telescopic spring 45. Through the connection of the ball 42 and the support sleeve 46, and the connection of the support plate 43 and the support column 44, the elastic support effect of the ball 42 at the position of action inside the connecting cap 4 is achieved under the connection of the support column 44 and the telescopic spring 45, so as to achieve the effect of preventing backflow of grouting.

[0020] Working principle: When performing anti-buoyancy counterweighting on segment 1, while the tunnel boring machine is grouting, a quick-setting agent is injected through connecting pipe 3 to accelerate the solidification of the injected grout. Then, under the action of grouting port 22, through the connection between the pipeline on the grouting equipment and grouting port 22, grout can be injected into the counterweight chamber 2 at different locations as needed to achieve the counterweight operation of segment 1, thereby achieving the counterweight effect of preventing segment 1 from floating. Under the connection of connecting cap 4 and grouting port 22, through the connection of support plate 43 and support column 44, and the elastic sliding connection of support column 44 and support sleeve 46, the ball 42 of the support column 44 slides elastically within the connecting cap 4. Under the action of the ball 42, the effect of preventing backflow of grout is achieved.

Claims

1. A counterweight structure for preventing tunnel lining segments from floating in water-rich strata across the sea, comprising tunnel lining segments, characterized in that: The surface of the tube segment is provided with a connecting groove, the inner wall of the tube segment is provided with a connecting pipe, the inner side of the connecting groove is provided with a grouting port, the surface passage of the grouting port is connected to a counterweight chamber, the outer surface of the grouting port is threaded with a connecting cap, the outer surface of the connecting cap is fixedly connected with a sealing ring, the inside of the connecting cap is fixedly connected with a support plate, the surface of the support plate is fixedly connected with a support column, the outer surface of the support column is fitted with a support sleeve, the inner side of the support sleeve is fixedly connected with a telescopic spring, and the surface of the support sleeve is fixedly connected with a ball bearing.

2. The counterweight structure for preventing tunnel segments from floating in water-rich strata across the sea as described in claim 1, characterized in that: The counterweight chamber is fitted onto the outer surface of the tube segment. The interior of the counterweight chamber is hollow. The initial state of the counterweight chamber is a thin film attached to the outer surface of the tube segment.

3. The counterweight structure for preventing tunnel segments from floating in water-rich strata across the sea according to claim 1, characterized in that: The counterweight bins and segments are of equal number, and the connecting pipes and segments are connected by a passageway.

4. The counterweight structure for preventing tunnel segments from floating in water-rich strata across the sea as described in claim 1, characterized in that: The grouting port penetrates the surface of the segment through the connecting groove, and the connecting cap acts inside the connecting groove through the grouting port.

5. The counterweight structure for preventing tunnel segments from floating in water-rich strata across the sea according to claim 1, characterized in that: The upper part of the connecting cap is conical in shape, and the sealing ring is annular in shape and fixed to the outer surface of the connecting cap.

6. The counterweight structure for preventing tunnel segments from floating in water-rich strata across the sea according to claim 1, characterized in that: The ball abuts against the inner wall of the connecting cap through the support sleeve and the support column, and the support column is elastically slidably connected to the support sleeve through a telescopic spring.

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