A structure that reduces disturbance to the existing line structure when crossing over the shield

Abstract

To provide a structure which has high installation efficiency, is a highly efficient reinforcement for an existing tunnel, and reduces disturbance to the existing line structure when spanning over a shield. The present invention includes a shield tunnel 1, a shield segment 11 is installed on the surface of the shield tunnel, a roadbed 12 is installed on the surface of the shield tunnel, and a reinforcing mechanism is installed on the surface of the roadbed, the reinforcing mechanism includes a first bolt, the first bolt is screwed onto the surface of the roadbed, and a first longitudinal steel frame 2 is drilled and connected onto the surface of the first bolt. The first longitudinal steel frame is attached onto the shield segment, then a second longitudinal steel frame 21 is attached onto the shield segment, and finally a transverse steel bar 3 is fixedly attached onto the first longitudinal steel frame and the second longitudinal steel frame, so that the assembly of the reinforcing mechanism is convenient and easy, and does not require much effort for installation.

Description

[Technical field]

[0001] The present invention relates to the technical field of tunnel reinforcement, and more particularly to a structure for reducing disturbance to existing railway structures caused by shield-over-shield construction. [Background technology]

[0002] With the rapid development of urban construction and the continuous densification of traffic networks, the construction of new subway tunnels with small clearances over existing subway tunnels is becoming more and more common. During the shield construction process, the no-loading of the earth body and the disturbance of the shield will cause additional stress and deformation in the existing subway tunnel structure, and when it becomes serious, it will even cause the destruction of the tunnel segment structure, thereby affecting the normal operation and safe use of the existing shield tunnel.

[0003] In order to reduce the deformation of the existing shield tunnel during the process of new tunnel construction, the existing tunnel is structurally reinforced to reduce the disturbance to the existing tunnel structure. The existing tunnel is generally reinforced by a prefabricated steel frame, but the traditional prefabricated steel frame is labor-intensive to install on the tunnel segment, and the installation efficiency is low, which slows down the reinforcement of the existing tunnel and affects the new tunnel construction progress. Summary of the Invention [Problem to be solved by the invention]

[0004] The objective of the present invention is to provide a structure for reducing disturbance to the existing line structure during construction over a shield, in order to solve the problems that the existing tunnels proposed in the background art above are generally reinforced by adopting prefabricated steel frames, but the traditional prefabricated steel frames are labor-intensive to install on the tunnel segments, have low installation efficiency, slow down the reinforcement of the existing tunnels, and affect the construction progress of new tunnels. [Means for solving the problem]

[0005] In order to achieve the above object, the present invention provides the following technical solution: A structure for reducing disturbance to an existing line structure during shield overpass construction includes a shield tunnel, a shield segment is installed on a surface of the shield tunnel, a roadbed is installed on the surface of the shield tunnel, and a reinforcing mechanism is installed on the surface of the roadbed, the reinforcing mechanism includes a first bolt, the first bolt is screwed onto the surface of the roadbed, a first longitudinal steel frame is drilled and connected onto the surface of the first bolt, a square nut is engaged and connected onto the surface of the first longitudinal steel frame, a second longitudinal steel frame is fixedly connected onto the surface of the square nut, and a second bolt is screwed onto the surface of the square nut. a slide block is slidably connected on a surface of the second vertical steel frame, a stopper block is fixedly connected to a bottom of the slide block, a screw is drilled and connected on the surface of the stopper block, a stopper nut is screwed onto the surface of the screw, a stopper post is fixedly connected to the surface of the slide block, a stopper circular groove is opened on the surface of the slide block, a horizontal steel bar is drilled and connected on the first vertical steel frame and the second vertical steel frame, a threaded post is fixedly connected to one end of the horizontal steel bar, and a thread groove is screwed into the other end of the horizontal steel bar.

[0006] Preferably, the first longitudinal steel frame and the second longitudinal steel frame are arc-shaped, and the first longitudinal steel frame and the second longitudinal steel frame are both in contact with and connected to the surface of the shield segment.

[0007] Preferably, a locking groove is drilled at one end of the first vertical steel frame, a stopper hole is drilled at the other end of the first vertical steel frame, the square nut is engaged and connected on the locking groove of the first vertical steel frame, and the first bolt is drilled and connected on the stopper hole of the first vertical steel frame.

[0008] Preferably, a guide hole is drilled on one side of the locking groove of the first vertical steel frame, the second bolt passes through the guide hole of the first vertical steel frame and is screwed with a square nut, the second bolt controls the position of the square nut in the locking groove of the first vertical steel frame, and the square nut controls the position of the second vertical steel frame on the first vertical steel frame.

[0009] Preferably, a guide groove is opened at the end of the second vertical steel frame away from the first vertical steel frame, and the guide groove is in a "T" shape, the slide block and the stopper block slide in the guide groove of the second vertical steel frame, the slide block is installed in two sets, and the stopper post is inserted into the stopper circular groove.

[0010] Preferably, a circular hole is drilled in the bottom of the stopper block, the screw is drilled onto the circular hole of the stopper block and connected thereto, and the screw and the stopper nut regulate the relative position between the two sets of slide blocks.

[0011] Preferably, circular holes are drilled on the surfaces of the first and second longitudinal steel frames, the transverse steel rods are inserted into the circular holes of the first and second longitudinal steel frames, the threaded posts of the transverse steel rods are screwed into the thread grooves of another set of transverse steel rods, and the first set of transverse steel rods of the first and second longitudinal steel frames are welded onto the circular holes of the first and second longitudinal steel frames. Effect of the Invention

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. A first bolt is inserted through the stopper hole of the first longitudinal steel frame and screwed onto the roadbed. The first bolt fixes the first longitudinal steel frame onto the shield segment and the shield tunnel. Then, a square nut is engaged into the locking groove of the first longitudinal steel frame to connect them. A second bolt is inserted through the guide hole of the first longitudinal steel frame and screwed onto the square nut. The second bolt fixes the second longitudinal steel frame onto the first longitudinal steel frame through the square nut. At this time, the slide block is slid on the surface of the second longitudinal steel frame, so that the stopper post of the slide block is inserted into the stopper circular groove of another set of slide blocks. Then, the screw is inserted through the circular hole of the stopper block, and the stopper nut is combined with the screw to fix the position between the two sets of stopper blocks, so that the two sets of slide blocks are in contact with each other to connect them together. At this time, the two sets of slide blocks play a bridge connection role on the two sets of second longitudinal steel frames, and finally the transverse steel rods are inserted into the circular holes of the first longitudinal steel frame and the second longitudinal steel frame, and the first set of transverse steel rods are welded onto the first longitudinal steel frame and the second longitudinal steel frame, and the next set of transverse steel rods can have their threaded columns screwed into the thread grooves of the previous set of transverse steel rods, so that all the transverse steel rods are fixedly mounted on the first longitudinal steel frame and the second longitudinal steel frame. At this time, the first longitudinal steel frame, the second longitudinal steel frame and the transverse steel rods are distributed on the shield segments in a grid to realize the reinforcement for the shield segments and the shield tunnel, so that the assembly of this reinforcement mechanism is convenient and easy, the installation is not labor-intensive, and the installation efficiency is high, which can efficiently reinforce the existing tunnel and ensure the construction progress of the new tunnel. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a schematic front perspective view of the structure of the present invention; [Diagram 2] FIG. 2 is a front view of the structure of the present invention; [Diagram 3] FIG. 2 is a schematic front and bottom perspective view of the first longitudinal steel frame and the second longitudinal steel frame structure of the present invention; [Figure 4] FIG. 4 is an enlarged schematic diagram of the structure of the present invention shown in FIG. [Diagram 5] 4 is a front and bottom sectional schematic view of a second longitudinal steel frame joint structure of the present invention; FIG. [Figure 6] 2 is a front sectional perspective exploded schematic view of the slide block connecting structure of the present invention; FIG. [Figure 7] FIG. 2 is a schematic front sectional perspective view of the cross-sectional steel bar structure of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] 1 to 7, one embodiment of the present invention is shown.

[0016] The structure for reducing disturbance to an existing line structure during shield overpass construction includes a shield tunnel 1, the shield tunnel 1 being an existing tunnel, a shield segment 11 is installed on a surface of the shield tunnel 1, a roadbed 12 is installed on the surface of the shield tunnel 1, and a reinforcing mechanism is installed on the surface of the roadbed 12, the reinforcing mechanism includes a first bolt 22, the first bolt 22 is screwed onto the surface of the roadbed 12, a first longitudinal steel frame 2 is drilled and connected onto the surface of the first bolt 22, and a first longitudinal steel frame 2 is drilled and connected onto the surface of the first longitudinal steel frame 2. A square nut 23 is engaged and connected, a second vertical steel frame 21 is fixedly connected onto the surface of the square nut 23, a second bolt 24 is screwed onto the surface of the square nut 23, a slide block 25 is slidably connected onto the surface of the second vertical steel frame 21, a stopper block 26 is fixedly connected to the bottom of the slide block 25, a screw 27 is drilled and connected onto the surface of the stopper block 26, a stopper nut 28 is screwed onto the surface of the screw 27, and a stopper block 29 is fixedly connected to the surface of the slide block 25. The bar column 29 is fixedly connected, a stopper circular groove 210 is drilled on the surface of the slide block 25, the horizontal steel rod 3 is drilled and connected on the first vertical steel frame 2 and the second vertical steel frame 21, a screw column 31 is fixedly connected to one end of the horizontal steel rod 3, and a screw groove 32 is screwed into the other end of the horizontal steel rod 3. This reinforcement mechanism is installed on the first vertical steel frame 2 on the shield tunnel 1 and the shield segment 11, then the second vertical steel frame 21 is installed on the first vertical steel frame 2, and then two sets of the second vertical steel frame 21 are installed on the first vertical steel frame 2. By connecting two vertical steel frames 21 together and then mounting a plurality of sets of horizontal steel bars 3 on the first vertical steel frame 2, the first vertical steel frame 2 and the second vertical steel frame 21 are combined with the horizontal steel bars 3 to support and reinforce the shield tunnel 1 and the shield segments 11 in a grid shape; the assembly of this reinforcement mechanism is convenient and easy, does not require much installation work, and has high installation efficiency, thereby ensuring the construction progress of new tunnels with high-efficiency reinforcement of existing tunnels.

[0017] Furthermore, the first longitudinal steel frame 2 and the second longitudinal steel frame 21 are arc-shaped, the first longitudinal steel frame 2 and the second longitudinal steel frame 21 are both in contact with and connected to the surface of the shield segment 11, the first longitudinal steel frame 2 and the second longitudinal steel frame 21 are installed in two sets, and the two sets of second longitudinal steel frames 21 do not come into contact after being mounted on the first longitudinal steel frame 2.

[0018] Furthermore, a locking groove is drilled at one end of the first longitudinal steel frame 2, a stopper hole is drilled at the other end of the first longitudinal steel frame 2, a square nut 23 is engaged and coupled on the locking groove of the first longitudinal steel frame 2, a first bolt 22 is drilled and coupled on the stopper hole of the first longitudinal steel frame 2, and the first bolt 22 is screwed onto the surface of the roadbed 12, so that the first bolt 22 can restrain the first longitudinal steel frame 2 on the surface of the roadbed 12, and further restrain the first longitudinal steel frame 2 on the surface of the shield segment 11, completing the quick installation to the first longitudinal steel frame 2.

[0019] Furthermore, a guide hole is drilled on one side of the locking groove of the first longitudinal steel frame 2, and a second bolt 24 passes through the guide hole of the first longitudinal steel frame 2 and is screwed into the square nut 23, the second bolt 24 controls the position of the square nut 23 in the locking groove of the first longitudinal steel frame 2, and the square nut 23 controls the position of the second longitudinal steel frame 21 in the first longitudinal steel frame 2, thereby completing the installation of the second longitudinal steel frame 21 in the first longitudinal steel frame 2.

[0020] Furthermore, a guide groove is opened at the end of the second vertical steel frame 21 away from the first vertical steel frame 2, and the guide groove is in a "T" shape. The slide block 25 and the stopper block 26 slide in the guide groove of the second vertical steel frame 21. Two sets of slide blocks 25 are installed, and the stopper posts 29 are inserted into the stopper circular groove 210. The stopper posts 29 in the two sets of slide blocks 25 are respectively inserted into the stopper circular groove 210, so that the two sets of slide blocks 25 are in contact with each other and connected together.

[0021] In addition, a circular hole is drilled at the bottom of the stopper block 26, and the screw 27 is drilled on the circular hole of the stopper block 26 and connected thereto. The screw 27 and the stopper nut 28 regulate the relative position between the two sets of slide blocks 25, so that the two sets of slide blocks 25 become one whole on the second vertical steel frame 21, and the overall length of the two sets of slide blocks 25 is relatively long. The two sets of slide blocks 25 can slide in the guide grooves of the second vertical steel frame 21, but the slide blocks 25 cannot slide out of the guide grooves of the two sets of second vertical steel frames 21 all the time, ensuring that the two sets of second vertical steel frames 21 are connected by the two sets of slide blocks 25.

[0022] In addition, circular holes are drilled on the surfaces of the first longitudinal steel frame 2 and the second longitudinal steel frame 21, the transverse steel rods 3 are inserted into the circular holes of the first longitudinal steel frame 2 and the second longitudinal steel frame 21, the transverse steel rods 3 are installed in multiple sets and aligned uniformly, the threaded posts 31 of the transverse steel rods 3 are screwed into the threaded grooves 32 of another set of transverse steel rods 3, the first set of transverse steel rods 3 in the first longitudinal steel frame 2 and the second longitudinal steel frame 21 are welded into the circular holes of the first longitudinal steel frame 2 and the second longitudinal steel frame 21, and the subsequent transverse steel rods 3 can be fixedly attached on the previous set of transverse steel rods 3 by the threaded posts 31 and the threaded grooves 32, thereby realizing the fixed attachment of the transverse steel rods 3 in the first longitudinal steel frame 2 and the second longitudinal steel frame 21.

[0023] Working principle: the first bolt 22 is passed through the stopper hole of the first longitudinal steel frame 2 and the first bolt 22 is screwed onto the roadbed 12, the first bolt 22 restricts the first longitudinal steel frame 2 onto the shield segment 11 and the shield tunnel 1, and then the square nut 23 is engaged into the locking groove of the first longitudinal steel frame 2 to connect them, the second bolt 24 is passed through the guide hole of the first longitudinal steel frame 2 and screwed into the square nut 23, the second bolt 24 is secured to the second longitudinal steel frame 2 by the square nut 23, 21 is fixed on the first longitudinal steel frame 2, and at this time, by sliding the slide block 25 on the surface of the second longitudinal steel frame 21, the stopper post 29 of the slide block 25 is inserted into the stopper circular groove 210 of another set of slide blocks 25, and then the screw 27 is inserted into the circular hole of the stopper block 26, and the stopper nut 28 is combined with the screw 27 to fix the position between the two sets of stopper blocks 26, and the two sets of slide blocks are further fixed. 25 are connected together in contact with each other, at this time the two sets of slide blocks 25 play a bridge connection role on the two sets of second longitudinal steel frames 21, and finally the transverse steel rods 3 are inserted into the circular holes of the first longitudinal steel frame 2 and the second longitudinal steel frame 21, and the first set of transverse steel rods 3 are welded onto the first longitudinal steel frame 2 and the second longitudinal steel frame 21, so that the threaded posts 31 of the next set of transverse steel rods 3 can be screwed into the threaded grooves 32 of the previous set of transverse steel rods 3, so that all the transverse steel rods 3 are connected to the first set of transverse steel rods 3, The first longitudinal steel frame 2, the second longitudinal steel frame 21 and the horizontal steel bars 3 are fixedly mounted on the shield segment 11, and the first longitudinal steel frame 2, the second longitudinal steel frame 21 and the horizontal steel bars 3 are distributed on the shield segment 11 in a grid to realize the reinforcement for the shield segment 11 and the shield tunnel 1. This makes the assembly of the reinforcement mechanism convenient and easy, does not require much effort in installation, and has high installation efficiency, thereby providing high-efficiency reinforcement for the existing tunnel and ensuring the construction progress of the new tunnel. [Explanation of symbols]

[0024] 1. Shield Tunnel 11 Shield Segment 12 Roadbed 2 First longitudinal steel frame 21 Second longitudinal steel frame 22 First Bolt 23 Square Nut 24 Second Bolt 25 Slide Block 26 Stopper block 27 Screw 28 Stopper nut 29 Stopper pillar 210 Stopper circular groove 3 Transverse steel rods 31 Screw pillar 32 Thread groove

Claims

1. A structure for reducing disturbance to an existing line structure during shield overpass construction, comprising a shield tunnel, a shield segment installed on a surface of the shield tunnel, a roadbed installed on the surface of the shield tunnel, and a reinforcing mechanism installed on the surface of the roadbed, the reinforcing mechanism including a first bolt, the first bolt being screwed onto the surface of the roadbed, a first longitudinal steel frame drilled and connected onto a surface of the first bolt, a square nut engaged and connected onto a surface of the first longitudinal steel frame, a second longitudinal steel frame fixedly connected onto a surface of the square nut, a second bolt being screwed onto a surface of the square nut, and a second longitudinal steel frame being fixedly connected onto a surface of the square nut. a slide block is slidably connected on a surface of said first longitudinal steel frame, a stopper block is fixedly connected to a bottom part of said slide block, a screw is drilled and connected on the surface of said stopper block, a stopper nut is screwed onto the surface of said screw, a stopper post is fixedly connected on the surface of said slide block, a stopper circular groove is opened on the surface of said slide block, a horizontal steel bar is drilled and connected on said first longitudinal steel frame and said second longitudinal steel frame, a threaded post is fixedly connected to one end of said horizontal steel bar, and a thread groove is screwed into the other end of said horizontal steel bar.

2. The structure for reducing disturbance to an existing line structure during shield overpass construction as described in claim 1, characterized in that the first longitudinal steel frame and the second longitudinal steel frame are arc-shaped, and the first longitudinal steel frame and the second longitudinal steel frame are both in contact with and connected to the surface of the shield segment.

3. The structure for reducing disturbance to an existing line structure in a shield overpass construction according to claim 1, characterized in that a locking groove is drilled at one end of the first vertical steel frame, a stopper hole is drilled at the other end of the first vertical steel frame, the square nut is engaged and connected on the locking groove of the first vertical steel frame, and the first bolt is drilled and connected on the stopper hole of the first vertical steel frame.

4. A structure for reducing disturbance to an existing line structure during shield over-straddle construction as described in claim 3, characterized in that a guide hole is drilled on one side of the locking groove of the first vertical steel frame, the second bolt passes through the guide hole of the first vertical steel frame and is screwed into a square nut, the second bolt regulates the position of the square nut in the locking groove of the first vertical steel frame, and the square nut regulates the position of the second vertical steel frame on the first vertical steel frame.

5. The structure for reducing disturbance to the existing line structure during the shield overpass construction as described in claim 4, characterized in that a guide groove is opened at the end of the second vertical steel frame away from the first vertical steel frame, and the guide groove is in a "T" shape, the slide block and the stopper block slide in the guide groove of the second vertical steel frame, the slide block is installed in two sets, and the stopper post is inserted into the stopper circular groove.

6. A structure for reducing disturbance to an existing line structure during shield overhead construction as described in claim 1, characterized in that a circular hole is drilled in the bottom of the stopper block, the screw is drilled onto the circular hole of the stopper block and connected thereto, and the screw and the stopper nut regulate the relative position between the two sets of slide blocks.

7. The structure for reducing disturbance to an existing wire structure in a shield overpass construction according to claim 1, characterized in that: circular holes are drilled on the surfaces of the first and second vertical steel frames, the horizontal steel rods are inserted into the circular holes of the first and second vertical steel frames, the threaded posts of the horizontal steel rods are screwed into the thread grooves of another set of horizontal steel rods, and the first set of horizontal steel rods in the first and second vertical steel frames are welded onto the circular holes of the first and second vertical steel frames.

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