Subway tunnel construction duct piece temporary supporting structure

Abstract

The utility model discloses a temporary supporting structure for subway tunnel construction segments. A plurality of arc-shaped pipe pieces are arranged in the tunnel and are closed to form a ring, bases attached to the inner walls of the pipe pieces are symmetrically arranged at the two ends of the tunnel ground, supporting assemblies are arranged on the bases, and arc-shaped side plate frames used for supporting the side pipe pieces are arranged at the top ends of the supporting assemblies. An arc-shaped center frame used for supporting a top segment is arranged between the two side plate frames, an ejector rod is arranged on the bottom face of the center frame, an axis frame is arranged at the lower end of the ejector rod, and the axis frame is hinged to the upper portions and the lower portions of the two supporting assemblies through an upper side position supporting rod and a lower side position supporting rod respectively. According to the supporting structure, a large space is reserved for the middle area while stable supporting is kept, soil in a channel can be transported outwards conveniently, convenience is provided for tunnel construction operation, meanwhile, when the whole supporting structure is used for supporting, arrangement is fast, the number of manual operation steps is small, safety is high, and the supporting stability of a duct piece combination is effectively improved.

Description

Technical Field

[0001] The utility model relates to subway tunnel construction, in particular to a temporary support structure for segment of subway tunnel construction. Background Technique

[0002] The subway tunnel includes an up-line and a down-line, and there is a connecting passage between the up-line and the down-line for people on both sides to interact, which is convenient for maintenance, escape in case of emergency, etc. This passage is opened after the segment installation is completed during the subway construction. During the opening process, the installed segments need to be broken and cut, and then the passage is excavated along the measured route. The inner wall of the passage is also supported by a structure to complete the construction of the passage. Since the segments at the passage position are broken, the segment support of this section of the tunnel is overall fragile, and the remaining segments cannot form a complete closed loop, and the load-bearing capacity is very weak. As a result, when the segments are broken, there are potential risks of deformation or even collapse in this section of the tunnel. Therefore, when the segments are broken, a support frame needs to be added in advance, and the support frame plays a temporary support role for the entire excavation stage to ensure safety.

[0003] Existing support frames are mostly support frame structures composed of splicing square pipes or round pipes. The disassembly and installation of the support frame are relatively cumbersome, and a layout of support rods is mostly adopted during the support process, resulting in too many support rods in the tunnel, which in turn affects the overall construction progress. At the same time, since the soil in the passage needs to be transported out, generally a trolley is erected on the track to transfer the soil to the trolley and then remove it from the tunnel. This makes it difficult to transport in a tunnel environment with many support rods and affects the construction efficiency. Summary of the Utility Model

[0004] The utility model aims to solve the above technical problems, so as to provide a temporary support structure for segments of subway tunnel construction, improve construction efficiency and improve safety.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A temporary support structure for segments of subway tunnel construction. There are multiple arc-shaped segments in the tunnel, and the multiple segments are closed into a ring. Symmetrically arranged at both ends of the tunnel floor are bases that fit the inner walls of the segments, and support components are provided on the bases. The top of the support component is provided with an arc-shaped side plate frame for supporting the side segments;

[0007] An arc-shaped central frame for supporting the top segment is provided between the two side plate frames. A top rod is provided on the bottom surface of the central frame, and an axle center frame is provided at the lower end of the top rod. The axle center frame is respectively hinged to the upper and lower parts of two groups of support components through upper side position support rods and lower side position support rods.

[0008] Compared with the prior art, the utility model adopting the above technical solution has the following beneficial effects:

[0009] The upper side support rod and the lower upper side support rod are respectively connected to the axis frame to form a way of jacking reinforcement and reaction force transmission, and cooperate with the base and the side plate frame to form synchronous support around the inner wall of the overall segment in the tunnel. Thus, while maintaining stable support, a relatively large space is left for the middle area, facilitating the outward transportation of soil in the passage and providing convenience for tunnel construction operations. At the same time, the overall support structure is quickly installed during support use, with few manual operation steps, high safety, and the center frame and the side plate frames on both sides are all attached to the segment combination gap, effectively improving the support stability of the segment combination.

[0010] Furthermore, the optimization scheme of the present utility model is as follows:

[0011] The base is in an inverted F shape, the outer side surface of the base is arc-shaped, the lower horizontal part of the base is bolted to the tunnel ground, and the support assembly is fixedly connected to the top surface of the upper horizontal part of the base.

[0012] The support assembly includes a first hydraulic cylinder and a second hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder are arranged in parallel along the width direction of the segment. A lower connecting rod is provided between the cylinder bodies of the first hydraulic cylinder and the second hydraulic cylinder, and an upper connecting rod is provided between the piston rods of the first hydraulic cylinder and the second hydraulic cylinder.

[0013] The upper connecting rod is hinged to the upper side support rod, and the lower connecting rod is hinged to the lower side support rod.

[0014] Both the upper side support rod and the lower side support rod are hydraulic cylinders.

[0015] Side arc frames are respectively provided on both sides of the top rod, and the side arc frames are respectively connected to the center frame and the axis frame.

[0016] The outer arc surfaces of the center frame and the side plate frames are provided with anti-slip layers.

[0017] Positioning rods are respectively provided between the lower ends of the inner arc surfaces of the side plate frames and the piston rods of the first hydraulic cylinder and the second hydraulic cylinder.

[0018] Both the center frame and the side plate frames are located at the combination seams of two adjacent segments. Description of the Drawings

[0019] Figure 1 Isometric view of the embodiment of the present utility model;

[0020] Figure 2 Front view of the embodiment of the present utility model;

[0021] Figure 3 Schematic structural view of the center frame of the embodiment of the present utility model.

[0022] In the figure: Tunnel 1; Segment 101; Base 102; Bolt 103; Support rod assembly 104; First hydraulic cylinder 1041; Second hydraulic cylinder 1042; Lower connecting rod 1043; Upper connecting rod 1044; Side plate frame 105; Upper side support rod 106; Lower side support rod 107; Positioning rod 108; Central support assembly 2; Axle center frame 201; Thrust rod 202; Side arc frame 203; Central frame 204; Anti-slip layer 205. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0025] Refer to Figures 1 - 3 , this embodiment provides a temporary support structure for subway tunnel segments during construction, mainly composed of a support rod assembly 104 and a central support assembly 2. A plurality of arc-shaped segments 101 are installed on the inner wall of the tunnel 1, and the plurality of segments 101 are closed into a ring, and the invert of the tunnel floor is concentric with the segment 101.

[0026] Bases 102 are symmetrically installed at both ends of the tunnel floor. The base 102 is in an inverted F shape. The outer side surface of the base 102 is arc-shaped and fits with the segment 101. The lower horizontal part of the base 102 is connected to the tunnel floor through bolts 103. The top surface of the upper horizontal part of the base 102 is provided with a support assembly 104. The support assembly 104 is composed of a first hydraulic cylinder 1041, a second hydraulic cylinder 1042, a lower connecting rod 1043 and an upper connecting rod 1044. The first hydraulic cylinder 1041 and the second hydraulic cylinder 1042 are arranged in parallel and vertically along the width direction of the segment 104. A horizontal lower connecting rod 1043 is installed between the cylinder bodies of the first hydraulic cylinder 1041 and the second hydraulic cylinder 1042, and a horizontal upper connecting rod 1044 is installed between the piston rods of the first hydraulic cylinder 1041 and the second hydraulic cylinder 1042.

[0027] The top end of the support assembly 104 is installed with a side plate frame 105. The side plate frame 105 is arc-shaped, which fits with the side segment 101 and is used to support the side segment 101. The side plate frame 105 is located at the joint of two segments 101. The inner arc surfaces of the side plate frame 105 are respectively connected to the piston rods of the first hydraulic cylinder 1041 and the second hydraulic cylinder 1042. A positioning rod 108 is provided between the lower ends of the inner arc surfaces of the side plate frame 105 and the piston rods of the first hydraulic cylinder 1041 and the second hydraulic cylinder 10452.

[0028] A center frame assembly 2 is arranged between two side plate frames 105. The center frame assembly 2 is mainly composed of an axis frame 201, a top rod 202, a side arc frame 203 and a center frame 204. The center frame 204 is arc-shaped, which is located at the joint of two top segments 101. The center frame 204 fits with the segment 101 and supports the segment 101. A vertical top rod 202 is welded to the bottom surface of the center frame 204. The lower end of the top rod 202 is installed with an axis frame 201. The axis frame 201 is respectively hinged to the upper connecting rod 1044 and the lower connecting rod 1043 of two groups of support assemblies 104 through the upper side support rod 106 and the lower side support rod 107. Both the upper side support rod 106 and the lower side support rod 107 adopt hydraulic cylinders. Anti-slip layers 205 are arranged on the outer arc surfaces of the center frame 204 and the side plate frame 105. The anti-slip layers 205 improve the friction between the center frame 204 and the side plate frame 105 and the segment 101. The center frame 204 and two groups of side plate frames 105 form a fitting support at the center and on both sides.

[0029] The using process of this embodiment is as follows: Fit the bases 102 of two groups of support structures along both sides of the bottom end of the inner wall of the segment 101, so that the arc-shaped structures at the edges of the bases 102 are in place in contact with the inner wall of the segment 101. Subsequently, pass bolts 103 through the bases 102 and fix them to the ground of the tunnel 1. After the installation of two groups of bases 102 is completed, simultaneously lift the support rod assemblies 104 of the two groups of hydraulic structures until the side plate frames 105 connected to the top ends of the support rod assemblies 104 contact the inner wall of the segment 101 and fit on both sides. At the same time, turn on the upper side support rods 106 and the lower side support rods 107 connected to the centers of both ends of the support rod assemblies 104, and make them extend synchronously to jack up the axis frame 201. During the jacking process of the axis frame 201, make the top rod 202 and the center frame 204 connected to the top end fit tightly with the top end of the inner wall of the segment 201, and maintain the supporting force. When the contact force is applied, the acting force generated by the jacking is then transmitted back to both ends of the support rod assemblies 104 through the two groups of upper side support rods 106 and the lower side support rods 107. Through the support rod assemblies 104, the support reaction force is applied to the support and reinforcement of the two groups of side plate frames 105 and the bases 102, and keep the surrounding fitting stable, thus completing the placement of this support structure.

[0030] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.

Claims

1. A temporary support structure for segments in subway tunnel construction. There are multiple arc-shaped segments in the tunnel, and the multiple segments are closed to form a ring. It is characterized in that: At both ends of the tunnel floor, there are symmetrically arranged bases that fit the inner walls of the segments. On the bases, there are support components, and at the top of the support components, there is an arc-shaped side plate frame for supporting the side segments. Between the two side plate frames, there is an arc-shaped center frame for supporting the top segment. At the bottom of the center frame, there is a top rod, and at the lower end of the top rod, there is an axis frame. The axis frame is respectively hinged to the upper and lower parts of two groups of support components through upper side position support rods and lower side position support rods.

2. The temporary support structure for segment in subway tunnel construction according to claim 1, characterized in that: The base is in an inverted F shape, the outer side surface of the base is arc-shaped, the lower horizontal part of the base is bolted to the tunnel floor, and the support component is fixedly connected to the top surface of the upper horizontal part of the base.

3. The temporary support structure for segment in subway tunnel construction according to claim 1, wherein: The support component includes a first hydraulic cylinder and a second hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder are arranged in parallel along the width direction of the segment. There is a lower connecting rod between the cylinder bodies of the first hydraulic cylinder and the second hydraulic cylinder, and there is an upper connecting rod between the piston rods of the first hydraulic cylinder and the second hydraulic cylinder.

4. The temporary support structure for segment in subway tunnel construction according to claim 3, characterized in that: The upper connecting rod is hinged to the upper side position support rod, and the lower connecting rod is hinged to the lower side position support rod.

5. The temporary support structure for segment in subway tunnel construction according to claim 1, wherein: Both the upper side position support rod and the lower side position support rod are hydraulic cylinders.

6. The temporary support structure for segment of subway tunnel construction according to claim 1, characterized in that: On both sides of the top rod, there are respectively side arc frames, and the side arc frames are respectively connected to the center frame and the axis frame.

7. The temporary support structure for segment in subway tunnel construction according to claim 1, wherein: The outer arc surfaces of the center frame and the side plate frame are provided with anti-slip layers.

8. The temporary support structure for segment in subway tunnel construction according to claim 1, characterized in that: Between the lower ends of the inner arc surfaces of the side plate frames and the piston rods of the first hydraulic cylinder and the second hydraulic cylinder respectively, there are positioning rods.

9. The temporary support structure for segment in subway tunnel construction according to claim 1, wherein: Both the center frame and the side plate frame are located at the joint of two adjacent segments.

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