An integrated construction equipment for excavation and support to maintain the stability of the tunnel face

Abstract

The present application provides an excavation and support integrated construction equipment for maintaining the stability of the tunnel face, the excavation and support integrated construction equipment for maintaining the stability of the tunnel face comprises a self-propelled spiral anchor and a rotary cutting disc, the outer peripheral wall of the self-propelled spiral anchor is provided with a first spiral blade, the rotary cutting disc is connected to the self-propelled spiral anchor, the rotary cutting disc and the self-propelled spiral anchor are relatively fixed in the circumferential direction of the self-propelled spiral anchor; the self-propelled spiral anchor is used to be screwed into the face and can move forward together with the rotary cutting disc in the excavation direction. Excavation and support are integrated, the operation is safe, efficient, has a wide range of applications, and is low in cost.

Description

Technical Field

[0001] The present invention relates to the field of tunneling equipment, and in particular to an excavation and support integrated construction equipment for maintaining the stability of a tunnel face. Background Art

[0002] Common excavation methods for soft rock tunnels include the New Austrian Tunneling Method (NATM), the TBM method, and the New Tunneling Method. The New Tunneling Method can realize full-section tunnel excavation, with fast construction speed and guaranteed safety. However, it is necessary to install long anchor rods and other advance supports in front of the face, which are then removed during the excavation process, resulting in unnecessary waste and high construction costs. The shield method has fast construction speed, less labor, safe construction, and a smooth excavation surface, but it also has some disadvantages: (1) Its body is large and inconvenient to transport. It is more suitable for the excavation of long holes, but the cost is higher for short tunnels; (2) The diameter of the shield machine cannot be adjusted in time with the tunnel excavation; (3) It is difficult to realize small radius curve construction; (4) The slag needs to be improved during construction; (5) The support method is not flexible and can only be assembled in the form of pipe segments; (6) It has poor adaptability to geological conditions and rock property changes and has limitations in use. Summary of the invention

[0003] The purpose of the present invention is to provide an integrated excavation and support construction device for maintaining the stability of the tunnel face, which can improve the technical problems existing in the tunneling equipment of the prior art.

[0004] The embodiment of the present invention is achieved as follows:

[0005] The present invention provides an excavation and support integrated construction equipment for maintaining the stability of a tunnel face, which is suitable for excavating a soft surrounding rock tunnel, and comprises:

[0006] A self-propelled spiral anchor and a rotary cutting disc, wherein the outer peripheral wall of the self-propelled spiral anchor is provided with a first spiral blade, the rotary cutting disc is connected to the self-propelled spiral anchor, and the rotary cutting disc and the self-propelled spiral anchor are relatively fixed in the circumferential direction of the self-propelled spiral anchor; the self-propelled spiral anchor is used to be screwed into the tunnel face and can move forward together with the rotary cutting disc in the excavation direction.

[0007] In an optional embodiment, a first slag outlet is provided on the rotary cutting cutter disc.

[0008] In an optional embodiment, the self-propelled spiral anchor is provided with a first rod segment and a second rod segment connected, the pitch of the first spiral blade on the first rod segment is equal to the pitch of the first spiral blade on the second rod segment; and the outer diameter of the first spiral blade on the second rod segment gradually decreases in the direction from the first rod segment to the second rod segment.

[0009] In an optional embodiment, the integrated excavation and support construction equipment for maintaining the stability of the tunnel face also includes an anchor sleeve, a second spiral blade is arranged on the outer cylinder wall of the anchor sleeve, the anchor sleeve is sleeved outside the self-propelled spiral anchor and fixedly connected to the self-propelled spiral anchor; the front end of the self-propelled spiral anchor in the excavation direction extends out of the anchor sleeve.

[0010] In an optional embodiment, the anchoring sleeve has a first end and a second end opposite to each other, and the outer diameter of the second spiral blade gradually decreases from the first end to the second end; and the front end of the self-propelled spiral anchor extends out of the second end.

[0011] In an optional embodiment, a plurality of notches are provided on the second spiral blade, and the plurality of notches divide the second spiral blade into a plurality of arc-shaped plates arranged on a spiral line.

[0012] In an optional embodiment, a second slag outlet is provided on the anchoring sleeve.

[0013] In an optional embodiment, a plurality of fixing plates are provided on the outer circumferential surface of the first spiral blade, and the side of the fixing plates away from the first spiral blade is fixedly connected to the inner cylinder wall of the anchor sleeve.

[0014] In an optional embodiment, the rotary drilling cutter disc is sleeved outside the anchor sleeve, and the two are relatively fixed in the circumferential direction of the anchor sleeve; the self-propelled spiral anchor rod is connected to the rotary drilling cutter disc through a force transmission member.

[0015] In an optional embodiment, the integrated excavation and support construction equipment for maintaining the stability of the tunnel face also includes a power mechanism, which is connected to the self-propelled spiral anchor and is used to drive the self-propelled spiral anchor to rotate, thereby driving the rotary cutting disc to rotate.

[0016] The beneficial effects of the embodiments of the present invention are:

[0017] In summary, the excavation and support integrated construction equipment for maintaining the stability of the tunnel face provided by this embodiment can be used in combination with multiple self-propelled spiral anchors and multiple rotary cutting discs. The combined structure can be set up as needed, which is flexible and changeable, so that tunnels with different cross-sectional shapes can be excavated; and by adjusting the insertion angle of the self-propelled spiral anchor, the construction with a small curvature radius can be satisfied. At the same time, during the tunnel excavation process, as the self-propelled spiral anchor and the rotary cutting disc drill forward, the self-propelled spiral anchor realizes the advance support of the face, and the rotary cutting disc realizes the excavation of the face, thereby realizing the integration of tunnel face excavation and support, ensuring construction safety, and accelerating the construction progress; and the self-propelled spiral anchor drills forward as the tunnel is excavated, and can be reused to reduce the project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic structural diagram of an excavation and support integrated construction device for maintaining tunnel face stability according to an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the application structure of an excavation and support integrated construction equipment for maintaining the stability of a tunnel face according to an embodiment of the present invention from one perspective;

[0021] Figure 3 A schematic diagram of the application structure of the excavation and support integrated construction equipment for maintaining the stability of the tunnel face according to an embodiment of the present invention from another perspective;

[0022] Figure 4 It is a structural schematic diagram of a modified example of the excavation and support integrated construction equipment for maintaining the stability of the tunnel face according to an embodiment of the present invention;

[0023] Figure 5 It is a schematic cross-sectional structural diagram of an excavation and support integrated construction equipment for maintaining the stability of a tunnel face according to an embodiment of the present invention;

[0024] Figure 6 The figure is a schematic diagram of the deformation structure of the self-advancing spiral anchor rod according to an embodiment of the present invention.

[0025] icon:

[0026] 001-tunnel; 100-self-advancing spiral anchor; 110-rod body; 111-first end; 112-second end; 113-first rod section; 114-second rod section; 120-first spiral blade; 130-first anti-rotation connector; 140-fixing plate; 200-rotary cutterhead; 210-disk body; 211-first slag outlet; 220-excavation tooth; 300-anchor sleeve; 310-cylinder body; 311-third end; 312-fourth end; 313-second slag outlet; 314-slag discharge channel; 320-second anti-rotation connector; 330-second spiral blade; 331-notch; 400-anti-retreat fastener. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] First embodiment

[0034] See also Figure 1 In this embodiment, the integrated excavation and support construction equipment for maintaining the stability of the tunnel face includes a self-propelled spiral anchor 100 and a rotary cutting disc 200. The outer peripheral wall of the self-propelled spiral anchor 100 is provided with a first spiral blade 120. The rotary cutting disc 200 is connected to the self-propelled spiral anchor 100. The rotary cutting disc 200 and the self-propelled spiral anchor 100 are relatively fixed in the circumferential direction of the self-propelled spiral anchor 100. The self-propelled spiral anchor 100 is used to be screwed into the tunnel face and can move forward together with the rotary cutting disc 200 in the excavation direction.

[0035] The excavation and support integrated construction equipment for maintaining the stability of the tunnel face provided by this embodiment can be used in combination with multiple self-propelled spiral anchor rods 100 and multiple rotary cutting discs 200 when in use. The combined structure can be set as needed, which is flexible and changeable, so that tunnels 001 with different cross-sectional shapes can be excavated; and by adjusting the drilling angle of the self-propelled spiral anchor rod 100, the construction of a small curvature radius can be satisfied. At the same time, during the excavation of tunnel 001, with the drilling of the self-propelled spiral anchor rod 100 and the rotary cutting disc 200, the self-propelled spiral anchor rod 100 realizes the advanced support of the face, and the rotary cutting disc 200 realizes the excavation of the face, thereby realizing the integration of excavation and support of the face of tunnel 001, ensuring construction safety and accelerating the construction progress; and the self-propelled spiral anchor rod 100 drills forward with the excavation of tunnel 001, and can be reused to reduce the construction cost.

[0036] In this embodiment, optionally, the self-advancing spiral anchor 100 also includes a rod body 110 and a first anti-rotation connector 130 , the first anti-rotation connector 130 is connected to the rod body 110 , the first anti-rotation connector 130 is used to connect to the rotary cutter head 200 , and the first spiral blade 120 is connected to the rod body 110 .

[0037] Optionally, the rod body 110 is a cylindrical rod, and the rod body 110 has a first end 111 and a second end 112 in its length direction, the first end 111 is the rear end, the second end 112 is the front end, and the second end 112 is set as a tip. When drilling, the second end 112 is used to insert into the face, which is convenient for insertion and easy for construction. The first anti-rotation connector 130 is provided with a center hole, and the first anti-rotation connector 130 is sleeved outside the rod body 110 using its center hole. There is a distance between the first anti-rotation connector 130 and the second end 112, and the portion of the rod body 110 between the first anti-rotation connector 130 and the second end 112 is used to connect the first spiral blade 120. The cross-sectional outer contour of the first anti-rotation connector 130 is non-circular, wherein the cross section is a plane perpendicular to the axis of the rod body 110. For example, the outer contour of the cross section of the first anti-rotation connector 130 is a regular hexagon. Obviously, the first anti-rotation connector 130 can also be other structures. For example, the outer contour of the cross section of the first anti-rotation connector 130 is an ellipse, a pentagon, etc., or a combination of arcs and line segments, as long as the outer contour of the cross section of the first anti-rotation connector 130 is non-circular.

[0038] It should be understood that the first anti-rotation connector 130 and the rod body 110 can be fixed by welding. The first anti-rotation connector 130 and the rod body 110 are not only relatively fixed in the circumferential direction of the rod body 110, but also relatively fixed in the axial direction of the rod body 110. The first anti-rotation connector 130 and the rod body 110 are an integrated structure.

[0039] Optionally, the first spiral blade 120 is fixed on the outer peripheral wall of the rod body 110 and is located between the first anti-rotation connector 130 and the second end 112. The first spiral blade 120 and the rod body 110 can be integrally formed, with a firm structure, high strength, long service life and low cost.

[0040] In other embodiments, the self-propelled spiral anchor is provided with a connected first rod segment 113 and a second rod segment 114, the pitch of the first spiral blade on the first rod segment 113 is equal to the pitch of the first spiral blade on the second rod segment 114; and the outer diameter of the first spiral blade on the second rod segment 114 gradually decreases in the direction from the first rod segment 113 to the second rod segment 114.

[0041] In this embodiment, optionally, the rotary cutter disc 200 includes a disc body 210 and excavation teeth 220. The disc body 210 may be a disc, and a sleeve hole is provided in the middle of the disc body 210. The shape of the sleeve hole matches the shape of the first anti-rotation connector 130. In other words, the cross-sectional profile of the sleeve hole is non-circular, for example, the cross-sectional profile of the sleeve hole is a regular hexagon, an ellipse, etc. The disc body 210 is provided with a plurality of first slag outlets 211 evenly arranged around the sleeve hole, and each first slag outlet 211 penetrates the disc body 210 along the axial direction of the disc body 210, and is used to discharge the slag and the like generated during the excavation process.

[0042] The excavation teeth 220 are connected to a disk surface of the disk body 210, and the number and shape of the excavation teeth 220 can be set as needed. For example, multiple groups of excavation teeth 220 can be provided, and each group of excavation teeth 220 has tooth heads arranged in the radial direction of the disk body 210; multiple groups of excavation teeth 220 are evenly spaced and arranged in the circumferential direction of the disk body 210. And multiple groups of excavation teeth 220 and multiple first slag outlets 211 are alternately arranged in the circumferential direction of the disk body 210.

[0043] It should be noted that the opening area of ​​the first slag outlet 211 is adjustable to meet slag discharge requirements in various situations.

[0044] In this embodiment, when the self-advancing spiral anchor 100 is assembled with the rotary cutting disc 200, the rotary cutting disc 200 is sleeved on the outside of the first anti-rotation connecting member 130 using its sleeve hole, and the rotary cutting disc 200 and the self-advancing spiral anchor 100 are relatively fixed in the circumferential direction of the self-advancing spiral anchor 100. In this way, when the self-advancing spiral anchor 100 is driven to rotate by the power mechanism, the rotary cutting disc 200 can rotate together with the self-advancing spiral anchor 100.

[0045] See also Figure 2 and Figure 3It should be understood that the self-advancing spiral anchor 100 and the rotary cutting disc 200 are combined into a tunneling unit. When tunneling the tunnel 001, multiple tunneling units are used to cooperate, thereby realizing the excavation of the full section of the tunnel 001. That is, multiple self-advancing spiral anchors 100 of multiple tunneling units are drilled into the tunnel face from set positions on the tunnel face, and then a rotary cutting disc 200 is arranged outside the first anti-rotation connector 130 of each self-advancing spiral anchor 100, and the structural shape of the rotary cutting disc 200 on each self-advancing spiral anchor 100 can be set to be different. In this embodiment, in the excavation direction, multiple rotary cutting discs 200 are arranged in layers, and the shape and structure of the multiple rotary cutting discs 200 in each layer are set as needed, and the multiple rotary cutting discs 200 in the same layer are located on the same cross-section. For example, in the excavation direction, there are a rear end cutter disc, a middle cutter disc and a front end cutter disc from the rear end to the front end respectively. During excavation, the multiple rotary cutting discs 200 of the front end cutter disc first contact part of the tunnel face for excavation. As the excavation depth increases, the middle cutter disc contacts the area on the tunnel face that has not been excavated by the front end cutter disc, and the middle cutter disc can perform excavation; then, as the excavation depth continues to increase, the rear end cutter disc contacts the area on the tunnel face that has not been excavated by the front end cutter disc and the middle cutter disc, and the rear end cutter disc can perform excavation. In this way, through the cooperation of multiple layers of cutter discs, the excavation operation of the entire section of Tunnel 001 is realized.

[0046] Obviously, according to the different forms of the tunnel 001, the number and position of the self-propelled spiral anchor rods 100 are set as needed, and the shape, structure and combination form of the rotary cutting disc 200 are set as needed, which is flexible and adaptable to a wide range of applications.

[0047] In addition, the rotary cutting disc can be a regular cutter disc or a special-shaped cutter disc. When the rotary cutting disc 200 performs excavation construction, the rotation angle of the rotary cutting disc 200 is set as needed. Some of the rotary cutting discs 200 can continuously rotate in a circle, and some of the rotary cutting discs 200 can perform reciprocating swinging motions at acute angles or obtuse angles, which are not listed one by one in this embodiment.

[0048] The integrated excavation and support construction equipment for maintaining the stability of the tunnel face provided in this embodiment integrates excavation and support, has high operation safety, high efficiency, wide application range and low cost.

[0049] Second embodiment

[0050] See also Figure 4-Figure 6 This embodiment also provides an integrated excavation and support construction device for maintaining the stability of the tunnel face. This embodiment is a further improvement on the first embodiment, so that the excavation process can effectively discharge the slag and the construction is smoother. To avoid repetition and redundancy, the technical solution already disclosed in the first embodiment is no longer described in this embodiment, and only the improved solution is supplemented in this embodiment.

[0051] See also Figure 4-Figure 6 In this embodiment, the excavation and support integrated construction equipment for maintaining the stability of the tunnel face also includes an anchor sleeve 300, which includes a cylinder 310, a second anti-rotation connector 320 and a second spiral blade 330. The cylinder 310 is a cylindrical structure with both ends open. For ease of description, the two ends of the cylinder 310 are respectively a third end 311 and a fourth end 312. The cylinder 310 is used to be sleeved on the outside of the self-propelled spiral anchor 100 and fixedly connected to the self-propelled spiral anchor 100. The third end 311 corresponds to the first end 111, and the fourth end 312 corresponds to the second end 112. The second anti-rotation connector 320 is provided with a center hole, and the outer contour of the cross section of the second anti-rotation connector 320 is non-circular, and the cross section is a plane perpendicular to the axis of the center hole. For example, the outer contour of the cross section of the second anti-rotation connector 320 is a regular hexagon, an ellipse, etc. The second anti-rotation connector 320 is sleeved outside the cylinder 310 by using its central hole and is fixedly connected to the cylinder 310. The second anti-rotation connector 320 is spaced apart from the fourth end 312. The second anti-rotation connector 320 is used to connect to the rotary cutter head 200. The second spiral blade 330 is fixed outside the cylinder 310 and is located between the second anti-rotation connector 320 and the fourth end 312.

[0052] During construction, the anchor sleeve 300 and the self-propelled spiral anchor 100 are both drilled into the face, the anchor sleeve 300 plays an anchoring role, the self-propelled spiral anchor 100 and the anchor sleeve 300 form a slag discharge channel 314, and the self-propelled spiral anchor 100 can discharge the slag from the slag discharge channel 314 when rotating, thereby preventing the slag from affecting the drilling operation.

[0053] It should be understood that the third end 311 of the cylinder 310 can be set as the second slag outlet 313, and the first spiral blade 120 of the self-propelled spiral anchor 100 extends out of the second slag outlet 313. During the rotation of the self-propelled spiral anchor 100, the slag is discharged from the second slag outlet 313.

[0054] Optionally, a plurality of fixing plates 140 are provided on the outer circumferential surface of the first spiral blade 120, and the side of the fixing plate 140 away from the first spiral blade 120 is fixedly connected to the inner cylinder wall of the anchor sleeve 300, and the torque input to the self-propelled spiral anchor 100 is transmitted to the second anti-rotation connector 320 through the cylinder 310, and then transmitted to the rotary cutter head 200. The cylinder 310 is sleeved on the outside of the self-propelled spiral anchor 100, or the inner cylinder wall of the cylinder 310 contacts and welds the outer side surfaces of the plurality of fixing plates 140. The plurality of fixing plates 140 cooperate with the cylinder 310 to achieve multi-point connection, which can ensure the strength of the connection structure between the self-propelled spiral anchor 100 and the cylinder 310. When the torque is transmitted from the self-propelled spiral anchor 100 to the cylinder 310, the two are not easy to separate, and the force transmission is safe and reliable. At the same time, compared with the first spiral blade 120 in which the entire outer circumference is connected to the inner wall of the cylinder 310, a solution in which multiple fixed plates 140 are connected to the inner wall of the cylinder 310 at multiple points can increase the space between the inner wall of the cylinder 310 and the first spiral blade 120, that is, increase the space of the slag discharge channel 314, which is beneficial to the discharge of slag.

[0055] In this embodiment, optionally, a plurality of notches 331 are provided on the second spiral blade 330, and the plurality of notches 331 divide the second spiral blade 330 into a plurality of arc-shaped plates arranged on a spiral line. The second spiral blade 330 can not only play an anchoring role, but also because the second spiral blade 330 is not a continuous spiral blade structure, it can reduce the discharge of debris from the outer peripheral surface of the anchor sleeve 300, thereby making the anchor sleeve 300 more closely combined with the tunnel 001 and achieving a good anchoring effect.

[0056] In addition, the pitch of the second spiral blade 330 is equal everywhere, that is, the second spiral blade 330 is an equal pitch structure, and the outer diameter of the second spiral blade 330 gradually decreases from the third end 311 to the fourth end 312, which can increase the bonding tightness between the anchor sleeve 300 and the rock formation and improve the anchoring effect.

[0057] In other embodiments, in order to directly transmit the torque input from the self-propelled spiral anchor 100 to the rotary cutting disc 200, a force transmission rod may be provided between the rod body 110 and the rotary cutting disc 200, one end of the force transmission rod is fixed to the rod body 110, and the other end is fixed to the rotary cutting disc 200, forming a triangular structure with a stable structure, and the torque can be directly transmitted to the rotary cutting disc 200 through the force transmission rod. It should be understood that there may be multiple force transmission rods, and the multiple force transmission rods are evenly spaced and arranged in the circumferential direction of the rod body 110.

[0058] In other embodiments, an anti-backoff fastener 400 is also screwed on the outer wall of the cylinder body 310, and the rotary cutting disc 200 is located on the side of the anti-backoff fastener 400 close to the fourth end 312. In this way, when the rotary cutting disc 200 withdraws the anchor sleeve 300 from the fourth end 312 to the third end 311, the rotary cutting disc 200 can be blocked by the anti-backoff fastener 400, thereby preventing the rotary cutting disc 200 from slipping and increasing safety.

[0059] In other embodiments, the excavation and support integrated construction equipment for maintaining the stability of the tunnel face also includes a power mechanism, which is connected to the self-propelled spiral anchor 100 and is used to drive the self-propelled spiral anchor 100 to rotate, so as to drive the rotary cutting disc 200 to rotate, and can also push the rotary cutting disc 200 to move forward in the excavation direction, so that the rotary cutting disc 200, the self-propelled spiral anchor 100 and the anchor sleeve 300 all move forward in the excavation direction. At the same time, during the excavation process, by monitoring the excavation rate, adjusting the torque and thrust of the power mechanism, and controlling the drilling speed (drilling speed) of the anchor sleeve 300, it is ensured that the excavation speed of the rotary cutting disc 200 is not less than the drilling speed of the anchor sleeve 300, so as to improve the problem of idling of the anchor sleeve 300, damaging the surrounding rock of the hole wall, and reducing the anchoring force of the anchor sleeve 300.

[0060] It should be understood that the integrated excavation and support construction equipment for maintaining the stability of the tunnel face may also include an initial support device, a slag discharge device, etc., which are not listed one by one and described in detail in this embodiment.

[0061] The integrated excavation and support construction equipment for maintaining the stability of the tunnel face provided in this embodiment integrates excavation and support, has high operation safety, high efficiency, wide application range and low cost.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An integrated excavation and support construction equipment for maintaining the stability of the tunnel face, suitable for excavating soft surrounding rock tunnels, characterized in that: include: A self-advancing spiral anchor and a rotary cutting disc, wherein the outer peripheral wall of the self-advancing spiral anchor is provided with a first spiral blade, the rotary cutting disc is connected to the self-advancing spiral anchor, and the rotary cutting disc and the self-advancing spiral anchor are relatively fixed in the circumferential direction of the self-advancing spiral anchor; the self-advancing spiral anchor is used to be screwed into the tunnel face and can move forward together with the rotary cutting disc in the excavation direction; in the excavation direction, a plurality of the rotary cutting discs are arranged in layers, and during excavation, a plurality of the rotary cutting discs of the front cutter disc first contact a part of the tunnel face for excavation, and as the excavation depth increases, a plurality of the rotary cutting discs of the middle cutter disc contact the area on the tunnel face that has not been excavated by the front cutter disc, and the middle cutter disc performs excavation; as the excavation depth continues to increase, a plurality of the rotary cutting discs of the rear cutter disc contact the area on the tunnel face that has not been excavated by the front cutter disc and the middle cutter disc, and the rear cutter disc performs excavation, and through the cooperation of multiple cutter discs, the excavation operation of the entire section of the tunnel is realized; The excavation and support integrated construction equipment for maintaining the stability of the tunnel face also includes an anchor sleeve, a second spiral blade is arranged on the outer cylinder wall of the anchor sleeve, the anchor sleeve is sleeved outside the self-propelled spiral anchor and is fixedly connected to the self-propelled spiral anchor; the front end of the self-propelled spiral anchor in the excavation direction extends out of the anchor sleeve; The second spiral blade is provided with a plurality of notches, and the plurality of notches divide the second spiral blade into a plurality of arc-shaped plates arranged on a spiral line.

2. The excavation and support integrated construction equipment for maintaining tunnel face stability according to claim 1 is characterized in that: The rotary cutting disc is provided with a first slag outlet.

3. The excavation and support integrated construction equipment for maintaining tunnel face stability according to claim 1 is characterized in that: The self-propelled spiral anchor is provided with a first rod segment and a second rod segment connected to each other, the pitch of the first spiral blade on the first rod segment is equal to the pitch of the first spiral blade on the second rod segment; and the outer diameter of the first spiral blade on the second rod segment gradually decreases in the direction from the first rod segment to the second rod segment.

4. The excavation and support integrated construction equipment for maintaining tunnel face stability according to claim 1 is characterized in that: The anchoring sleeve has a first end and a second end opposite to each other, and the outer diameter of the second spiral blade gradually decreases from the first end to the second end; the front end of the self-propelled spiral anchor extends out of the second end.

5. The excavation and support integrated construction equipment for maintaining tunnel face stability according to claim 1 is characterized in that: The anchoring sleeve is provided with a second slag outlet.

6. The excavation and support integrated construction equipment for maintaining tunnel face stability according to claim 1 is characterized in that: A plurality of fixing plates are arranged on the outer peripheral surface of the first spiral blade, and the side of the fixing plates away from the first spiral blade is fixedly connected to the inner cylinder wall of the anchor sleeve.

7. The excavation and support integrated construction equipment for maintaining tunnel face stability according to claim 1 is characterized in that: The rotary drilling cutter disc is sleeved outside the anchor sleeve, and the two are relatively fixed in the circumferential direction of the anchor sleeve; the self-propelled spiral anchor rod is connected to the rotary drilling cutter disc through a force transmission member.

8. The excavation and support integrated construction equipment for maintaining tunnel face stability according to claim 1 is characterized in that: The integrated excavation and support construction equipment for maintaining the stability of the tunnel face also includes a power mechanism, which is connected to the self-propelled spiral anchor and is used to drive the self-propelled spiral anchor to rotate, thereby driving the rotary drilling cutter head to rotate.

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