A temporary support device for a tunnel boring machine

Abstract

The application discloses a tunnel boring machine temporary supporting device, comprising a plurality of jacking assemblies for connecting with a top shield, the jacking assembly comprising a bottom plate support, a guard plate for supporting surrounding rock and a hydraulic oil cylinder, the bottom plate support being installed at the outer edge of the back plate of the top shield; the hydraulic oil cylinder is connected with a hydraulic control device, the fixed end of the hydraulic oil cylinder is hinged with the bottom plate support, and the free end of the hydraulic oil cylinder is hinged with the guard plate, so that the hydraulic control device adjusts the angle of the guard plate through the telescopic hydraulic oil cylinder. Compared with the existing temporary supporting device, the tunnel boring machine temporary supporting device provided by the application has the advantages of simple structure, no occupation of operation space, flexible and efficient adjustment of the guard plate, reduction of labor intensity and improvement of supporting efficiency; the broken surrounding rock can be protected, the supporting effect is good and is not affected by geological conditions, the anchor net hanging process can be simplified, and the supporting efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel support, more particularly, to a tunnel boring machine temporary support device. BACKGROUND

[0002] In tunnel excavation construction, the exposed surrounding rock needs to be supported after every excavation distance to prevent the surrounding rock from falling or collapsing and injuring personnel.

[0003] Traditional temporary support devices, such as the coal mine tunneling temporary support device disclosed in CN 215566044U, include four groups of support columns with universal wheels at the lower end, two groups of support columns at the same end are provided with crossbars, length adjusting devices are provided between the support columns and the crossbars, and protective plates are provided above the support columns. The above-mentioned temporary support device has a complex structure, limited support space, occupies the entire space under the top shield, and causes difficulties for personnel construction; and the vibration generated by the cutter head during excavation can easily cause the exposed surrounding rock to loosen, which poses a safety hazard during the excavation process.

[0004] On this basis, there are finger-shaped shields such as CN 211258609U, which solve the problem of working space, but the finger-shaped shield is too bulky, causing difficulties for subsequent permanent support device construction such as anchor rods and anchor cables, and a large amount of manpower is required during the support process, resulting in high labor intensity and low work efficiency.

[0005] In summary, how to provide a temporary support device that is convenient to construct and flexible and efficient to support is a problem that needs to be solved by the technical personnel in the field at present. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a tunnel boring machine temporary support device that is simple in structure, convenient to construct, flexible and efficient in support, and has high stability and support efficiency.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] A tunnel boring machine temporary support device includes a plurality of jacking assemblies for connecting with a top shield, the jacking assembly includes a bottom plate support, a protective plate for supporting surrounding rock, and a hydraulic cylinder, the bottom plate support is installed on the outer edge of the back plate of the top shield;

[0009] The hydraulic cylinder is connected with a hydraulic control device, the fixed end of the hydraulic cylinder is hinged to the bottom plate support, and the free end of the hydraulic cylinder is hinged to the protective plate, so that the hydraulic control device adjusts the angle of the protective plate by extending or retracting the hydraulic cylinder.

[0010] Preferably, the bottom plate support is bolted to the back plate of the top shield.

[0011] Preferably, the distance between any two adjacent said protective plates is the same.

[0012] Preferably, further comprising a scribing assembly for positioning the installation position of the anchor rod and anchor cable, the scribing assembly comprising a scribing plate, a mounting seat and an L-shaped mounting bracket, the mounting seat being connected with the back plate of the top shield;

[0013] One end of the mounting bracket is hingedly connected with the mounting seat, and the other end of the mounting bracket is provided with the scribing plate;

[0014] The mounting seat and the mounting bracket are provided with a tension spring, one end of the tension spring being connected with the mounting seat, and the other end of the tension spring being connected with the mounting bracket.

[0015] Preferably, both sides of the bottom plate support are provided with the protective plate, the hydraulic oil cylinder is arranged in one-to-one correspondence with the protective plate, the mounting seat is connected with the bottom plate support, and the distance between the mounting seat and the protective plates on both sides is the same.

[0016] Preferably, the central part of the bottom plate support is provided with a weight-reducing hole.

[0017] The temporary support device of the tunnel boring machine provided by the application can control the extension and retraction of the hydraulic oil cylinder through the hydraulic control device, thereby adjusting the angle of the protective plate, making the protective plate tightly support the surrounding rock, and temporarily supporting the surrounding rock. When laying the anchor net, the hydraulic control device is used to control the retraction of the hydraulic oil cylinder, the hydraulic oil cylinder drives the protective plate to descend, so as to prevent the protective plate from interfering with the normal laying of the anchor net; after the anchor net is laid, the hydraulic control device is used to control the extension of the hydraulic oil cylinder, the hydraulic oil cylinder drives the protective plate to rise, and the protective plate is tightly arranged on the surrounding rock to support the anchor net, and then the anchor hole is drilled and the anchor rod is installed, and the support is completed.

[0018] In addition, when encountering broken sections of surrounding rock, the exposed surrounding rock gravel at the tail of the top shield is more and is prone to collapse, the protective plate can be lowered by controlling the retraction of the hydraulic oil cylinder through the hydraulic control device, and the broken rock is removed, and then the surrounding rock is supported.

[0019] Compared with the existing temporary support device, the temporary support device of the tunnel boring machine provided by the application has the advantages of simple structure, no occupation of operation space, flexible and efficient adjustment of the protective plate, which is beneficial to reduce labor intensity and improve support efficiency. At the same time, the jacking assembly is installed at the outer edge of the back plate of the top shield, the protective plate is arranged tightly on the surrounding rock under the action of the hydraulic oil cylinder, the broken surrounding rock can be protected, the support effect is good and is not affected by the geological conditions, and the anchor net hanging process can be simplified, and the support efficiency is further improved.

[0020] Preferably, a marking assembly for marking the installation position of the anchor rod and anchor cable can also be included, which is used to mark the surrounding rock to achieve accurate positioning of the anchor rod and anchor cable point, facilitating subsequent permanent support construction. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description only constitute a part of the embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0022] Figure 1 Structure diagram of a specific embodiment of the tunnel boring machine temporary support device provided by the present application;

[0023] Figure 2 Structure diagram of the jacking assembly;

[0024] Figure 3 Structure diagram of the marking assembly.

[0025] Figures 1-3 In:

[0026] 01 is the top shield, 1 is the jacking assembly, 11 is the bottom plate support, 12 is the guard plate, 13 is the hydraulic oil cylinder, 2 is the marking assembly, 21 is the mounting seat, 22 is the mounting bracket, 23 is the marking plate, and 24 is the tension spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] The core of the present application is to provide a tunnel boring machine temporary support device, which is simple in structure, convenient in construction, flexible and efficient in support, and has high surrounding rock stability and support efficiency.

[0029] Please refer to Figures 1-3 , Figure 1 Structure diagram of a specific embodiment of the tunnel boring machine temporary support device provided by the present application; Figure 2 Structure diagram of the jacking assembly; Figure 3 Structure diagram of the marking assembly.

[0030] The tunneling machine temporary support device provided by the application comprises a plurality of jacking assemblies 1 connected with the top shield 01, the jacking assembly 1 comprising a bottom plate support 11, a guard plate 12 for supporting the surrounding rock and a hydraulic oil cylinder 13, the bottom plate support 11 being installed at the outer edge of the back plate of the top shield 01.

[0031] The hydraulic oil cylinder 13 is connected with a hydraulic control device, the fixed end of the hydraulic oil cylinder 13 is hinged to the bottom plate support 11, and the free end of the hydraulic oil cylinder 13 is hinged to the guard plate 12, so that the hydraulic control device adjusts the angle of the guard plate 12 by extending or retracting the hydraulic oil cylinder 13.

[0032] Please refer to Figure 1 The bottom plate support 11 is arranged close to the back plate of the top shield 01 and is connected to the outer edge of the back plate to support the surrounding rock; the bottom plate support 11 and the back plate of the top shield 01 can be connected by welding or other non-detachable connection methods, or can be connected by pin connection, bolt connection or other detachable connection methods.

[0033] Considering the replacement and maintenance requirements of the jacking assembly 1, preferably, the bottom plate support 11 and the back plate of the top shield 01 can be bolted. Please refer to Figure 1 The outer edge of the bottom plate support 11 is uniformly provided with a plurality of bolt mounting holes for mounting fastening bolts, and the size of the fastening bolts is determined according to the calculation of the connection strength requirements of the top shield 01 and the bottom plate support 11.

[0034] The guard plate 12 is used to support the surrounding rock and prevent the surrounding rock from collapsing or falling off, and the back surface of the guard plate 12 is provided with a hinged support for hinging with the free end of the hydraulic oil cylinder 13, and the specific shape and size of the guard plate 12 are determined according to the outer diameter of the top shield 01 and the edge range of the surrounding rock in actual production, which will not be described here.

[0035] In order to effectively support the surrounding rock, preferably, the distance between any two adjacent guard plates 12 is the same, and the distance between the guard plates 12 is determined considering the outer diameter of the top shield 01 and the size of the guard plate 12.

[0036] The fixed end of the hydraulic oil cylinder 13 is hingedly connected with the bottom plate support 11, and the free end is hingedly connected with the guard plate 12, so that when the hydraulic oil cylinder 13 is extended, the guard plate 12 is pushed up, and when the hydraulic oil cylinder 13 is retracted, the guard plate 12 is lowered.

[0037] The hydraulic oil cylinder 13 is connected with a hydraulic control device, and the hydraulic control device can control the extension and retraction of the hydraulic oil cylinder 13 by the flow direction of the hydraulic oil. Compared with electric push rods and air cylinders, the output load of the hydraulic oil cylinder 13 is large and the motion stability is good.

[0038] In use, the extension and retraction of the hydraulic cylinder 13 can be controlled by the hydraulic control device, and the angle of the guard plate 12 is adjusted, so that the guard plate 12 is tightly arranged against the surrounding rock, and the surrounding rock is temporarily supported. When the anchor net is laid, the hydraulic cylinder 13 is controlled to retract by the hydraulic control device, and the guard plate 12 is lowered by the hydraulic cylinder 13, so as to prevent the guard plate 12 from interfering with the normal laying of the anchor net; after the anchor net is laid, the hydraulic cylinder 13 is controlled to extend by the hydraulic control device, and the guard plate 12 is lifted by the hydraulic cylinder 13, and the guard plate 12 is tightly arranged against the surrounding rock to support the anchor net, and then the anchor hole is drilled and the anchor rod is installed, and the support is completed.

[0039] In addition, when the broken section of the surrounding rock is encountered, the exposed surrounding rock gravel at the tail of the top guard shield 01 is more and is prone to collapse, the guard plate 12 can be lowered by controlling the hydraulic cylinder 13 to retract by the hydraulic control device, and the surrounding rock is supported after the broken rock is removed.

[0040] Compared with the existing temporary support device, the tunnel boring machine temporary support device provided by the embodiment has the advantages of simple structure, no occupation of operation space, flexible and efficient adjustment of the guard plate 12, and reduction of labor intensity and improvement of support efficiency.

[0041] Meanwhile, the jacking assembly 1 is installed at the outer edge of the back plate of the top guard shield 01, the guard plate 12 is arranged against the surrounding rock under the action of the hydraulic cylinder 13, the broken surrounding rock can be protected, the support effect is good and is not affected by the geological conditions, and the anchor net hanging process is simplified, and the support efficiency is further improved.

[0042] Preferably, please refer to Figure 1 The central part of the bottom plate support 11 can be provided with a weight-reducing hole to reduce the overall weight of the jacking assembly 1.

[0043] On the basis of the above-mentioned embodiment, the tunnel boring machine temporary support device further comprises a marking assembly 2 for positioning the installation position of the anchor rod and the anchor cable, the marking assembly 2 comprises a marking plate 23, a mounting seat 21 and an L-shaped mounting bracket 22, the mounting seat 21 is connected with the back plate of the top guard shield 01; one end of the mounting bracket 22 is hingedly connected with the mounting seat 21, and the other end of the mounting bracket 22 is provided with the marking plate 23; the mounting seat 21 and the mounting bracket 22 are provided with a tension spring 24, one end of the tension spring 24 is connected with the mounting seat 21, and the other end of the tension spring 24 is connected with the mounting bracket 22.

[0044] Please refer to Figure 1 and Figure 3 The mounting seat 21 is connected with the back plate of the top guard shield 01, so as to install the marking assembly 2 at the outer edge of the back plate of the top guard shield 01; the mounting seat 21 can be directly connected with the back plate of the top guard shield 01, or indirectly connected with the back plate of the top guard shield 01 through the bottom plate support 11.

[0045] The mounting bracket 22 is L-shaped, one end of which is hinged to the mounting seat 21, and the other end is connected with the fixed end of the scribing plate 23, for mounting the scribing plate 23 on the mounting seat 21; the scribing plate 23 can be connected on the mounting bracket 22 by means of bolt connection, pin connection or other detachable connection modes, so as to replace the scribing plate 23 after excessive wear.

[0046] The scribing end of the scribing plate 23 is arranged towards the surrounding rock, and is used for scribing on the surface of the surrounding rock; the size of the scribing end of the scribing plate 23 is generally smaller than that of the fixed end of the scribing plate 23, as shown in Figure 3 The specific material, shape and size of the scribing plate 23 are determined according to actual construction needs with reference to the prior art, and will not be described here.

[0047] The two ends of the tension spring 24 are connected with the mounting seat 21 and the mounting bracket 22 respectively, so as to keep the scribing plate 23 in contact with the surrounding rock by the pre-tightening force of the tension spring 24, so that the scribing plate 23 can scribe a marking line along the surrounding rock during the tunneling process, which can be used as a reference line for drilling of the drilling machine, so as to accurately position the anchor rod and anchor cable.

[0048] During the tunneling construction, the top shield 01 advances in the tunneling direction, driving the scribing assembly 2 mounted on the outer edge of the back plate to advance in the tunneling direction; when the surface of the surrounding rock is lowered, the pressure of the surrounding rock is transmitted to the mounting bracket 22 through the scribing plate 23, so that the mounting bracket 22 rotates clockwise around the hinge point with the mounting seat 21, and the tension spring 24 is stretched and accumulates elastic potential energy;

[0049] When the surface of the surrounding rock is raised, the mounting bracket 22 rotates counterclockwise under the action of the elastic restoring force of the tension spring 24, and in turn drives the height of the scribing plate 23 to be raised, so that the scribing plate 23 keeps in contact with the surface of the surrounding rock.

[0050] In this embodiment, the scribing assembly 2 can scribe on the surface of the surrounding rock, and the marking line is beneficial to accurate positioning of the anchor rod and anchor cable, which not only facilitates the subsequent drilling process of the drilling machine, but also is beneficial to increasing the stability of support.

[0051] Preferably, the two sides of the bottom plate support 11 are provided with the guard plates 12, the hydraulic oil cylinder 13 is arranged corresponding to the guard plates 12, the mounting seat 21 is connected with the bottom plate support 11, and the distance between the mounting seat 21 and the guard plates 12 on both sides is the same. Mounting the scribing assembly 2 on the bottom plate support 11 not only facilitates the installation of the scribing assembly 2, but also reserves enough construction space for drilling of the anchor hole.

[0052] The distance between the two adjacent scribing assemblies 2 is determined according to the distance between the anchor rods in actual construction, and will not be described here.

[0053] The various embodiments are described in the specification, each having its own focal point with respect to the differences from other embodiments, and the same or similar parts among the various embodiments are cross-referenced.

[0054] The tunneling machine temporary support device provided by the application is described in detail above. The principles and implementation manners of the application are described by applying specific examples in this paper, and the above description of the embodiments is only used to help understand the method of the application and its core idea. It should be pointed out that, for those skilled in the art, without departing from the principles of the application, the application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A temporary support device for a tunnel boring machine, characterized in that, The application relates to a roof shield (01) comprising a plurality of jacking assemblies (1) connected with the roof shield (01), wherein the jacking assemblies (1) comprise a bottom plate support (11), a shield (12) for supporting surrounding rock and a hydraulic oil cylinder (13), the bottom plate support (11) is mounted to the outer edge of the back plate of the roof shield (01); the hydraulic oil cylinder (13) is connected with a hydraulic control device, the fixed end of the hydraulic oil cylinder (13) is hinged to the bottom plate support (11), and the free end of the hydraulic oil cylinder (13) is hinged to the shield (12), so that the hydraulic control device adjusts the angle of the shield (12) by extending or retracting the hydraulic oil cylinder (13); the application further comprises a scribing assembly (2) for positioning the installation position of an anchor rod and an anchor cable, wherein the scribing assembly (2) comprises a scribing plate (23), a mounting seat (21) and an L-shaped mounting bracket (22), and the mounting seat (21) is connected with the back plate of the roof shield (01); one end of the mounting bracket (22) is hingedly connected with the mounting seat (21), the other end of the mounting bracket (22) is provided with the scribing plate (23), the scribing plate (23) is detachably connected with the mounting bracket (22), the scribing end of the scribing plate (23) faces the surrounding rock, and the size of the scribing end is smaller than that of the fixed end of the scribing plate (23); the mounting seat (21) and the mounting bracket (22) are provided with a tension spring (24), one end of the tension spring (24) is connected with the mounting seat (21), and the other end of the tension spring (24) is connected with the mounting bracket (22), so that the contact between the scribing plate (23) and the surrounding rock is maintained by the pre-tightening force of the tension spring (24), and the scribing plate (23) can draw a mark line along the surrounding rock during tunneling.

2. The temporary support device of claim 1, wherein, The bottom plate support (11) is bolted to the back plate of the roof shield (01).

3. The temporary support device of claim 1, wherein, The distance between any two adjacent shields (12) is the same.

4. The temporary support device of claim 1, wherein, Both sides of the bottom plate support (11) are provided with the shields (12), the hydraulic oil cylinders (13) are arranged in one-to-one correspondence with the shields (12), the mounting seat (21) is connected with the bottom plate support (11), and the distance between the mounting seat (21) and the shields (12) on both sides is the same.

5. The temporary support device of claim 1, wherein, The central part of the bottom plate support (11) is provided with a weight-reducing hole.

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