Deviation-rectifying and de-trapping structure and deviation-rectifying and de-trapping method for heading machine

Abstract

The invention discloses a deviation rectifying and escaping structure and a deviation rectifying and escaping method for a heading machine, and relates to the technical field of full-section tunnel boring construction. The deviation rectifying and trapping removing structure comprises an underground diaphragm wall arranged in front of the tunneling direction. A closed cavity structure with an opening in the upper end is defined by the underground diaphragm wall, the top of a cavity defined by the underground diaphragm wall is communicated with the ground, and the cavity defined by the underground diaphragm wall can be used for a deviation rectifying and escaping operation platform to vertically pass through. A sealing structure and an easily-tunneled structure are sequentially arranged on the two opposite sides of the underground continuous wall enclosure in the tunneling direction, the sealing structure and the easily-tunneled structure can both cover a tunneling section, and the tunneling section can be tunneled by the sealing structure and the easily-tunneled structure in the state that a cutterhead of a tunneling machine penetrates through the sealing structure. The sealing structure can seal a gap between the shield body of the tunneling machine and the underground diaphragm wall, and can meet the requirements of water stop, air tightness, safety, construction period and manufacturing cost of normal-pressure bin opening deviation rectification. The deviation rectifying and detrapping method is based on the deviation rectifying and detrapping structure.

Description

Technical Field

[0001] The invention relates to the technical field of full-section tunnel excavation construction, and in particular to a deviation correction and escape structure and a deviation correction and escape method for a tunnel boring machine. Background Art

[0002] During the tunneling construction process of the full-face tunnel boring machine, the shield, cutterhead and cutter, as the core components of the tunneling operation, are in direct contact with the stratum for a long time and suffer severe wear. As the tunneling distance increases, the shield deforms, the cutterhead and cutter are seriously worn, resulting in the tunnel boring machine being unable to tunnel normally, and causing deviation and entrapment. Therefore, timely replacement of cutters, maintenance of cutterheads and shields have become necessary measures to ensure the continuity and safety of the project.

[0003] In the prior art, except for specific environments (such as underwater or without ground reinforcement conditions), the normal pressure opening and deviation correction and escape method is mainly used in the excavation process of the full-section tunnel boring machine. The normal pressure opening and deviation correction and escape method often adopts ground mixing piles, rotary jet piles, sleeve valve pipe grouting, open-cut vertical shafts and open-cut foundation pit technologies, but under the soil conditions, ground mixing piles, rotary jet piles and sleeve valve pipe grouting technologies cannot meet the strict water-stopping and air-tightness requirements, and the safety risk of normal pressure opening and deviation correction and escape is relatively large. The open-cut vertical shaft and open-cut foundation pit technology have the problems of great impact on the surrounding environment and high investment. In other words, in the prior art, there is a lack of a normal pressure opening and deviation correction and escape stratum support system and method that can meet the water-stopping, air-tightness and safety standards of normal pressure opening and deviation correction and escape, and can also achieve a short construction period and low cost. Summary of the invention

[0004] The present invention provides a deviation correction and escape structure and a deviation correction and escape method for a tunnel boring machine. The deviation correction and escape structure and method are composed of a hollow wall vertically excavated and cast on the ground and synchronous grouting, so as to isolate the soil and water around the tunnel boring machine. The requirements of water stopping, air tightness, safety, construction period and cost of deviation correction and escape of normal pressure opening are met.

[0005] The present invention is achieved through the following technical solutions:

[0006] In the first aspect, the present invention provides a deviation correction and escape structure for a tunnel boring machine, comprising an underground continuous wall arranged in front of the tunneling direction; the underground continuous wall defines a closed cavity structure with an upper opening, the top of the cavity defined by the underground continuous wall is communicated with the ground, and the cavity defined by the underground continuous wall can allow a deviation correction and escape operation platform to pass vertically; along the tunneling direction, sealing structures and easy-tunneling structures are sequentially arranged on two opposite sides of the underground continuous wall, and the sealing structures and the easy-tunneling structures can both cover the tunneling section, and when the tunnel boring machine cutter head passes through the sealing structures, the sealing structures can seal the gap between the tunnel boring machine shield and the underground continuous wall.

[0007] The tunnel boring machine deviation correction and escape structure provided by the present invention comprises an underground continuous wall arranged in front of the tunnel boring party, the underground continuous wall defines a closed cavity structure with an upper end opening, the top of the cavity defined by the underground continuous wall is communicated with the ground, and can allow a deviation correction and escape escape operation platform to pass vertically, and at the same time, along the tunnel boring direction, sealing structures and easy tunnel boring structures are sequentially arranged on two opposite sides of the underground continuous wall, thereby, when the tunnel boring machine excavates to the underground continuous wall, its cutter head cuts the sealing structure and enters into the defined cavity, at this time, the space between the tunnel boring machine shield and the underground continuous wall can be sealed by the sealing structure The gap is formed, thereby isolating the soil in front of and around the cutter head of the tunnel boring machine through the underground continuous cavity, preventing the surrounding soil from collapsing and groundwater from entering. The synchronous sealing structure isolates the shield tail gap behind the tunnel boring machine cutter head and the partially over-excavated soil and groundwater, thereby forming a water-free, normal pressure and safe hollow area in the wall that directly connects to the ground, providing a normal pressure working space for the tunnel boring machine to correct deviation and escape from trouble and repair. The correction and escape workers can enter the hollow area through the upper opening defined by the underground continuous wall, and perform correction and escape operations on the inside and outside of the tunnel boring machine, and can also perform maintenance operations on the shield, cutter and cutter head. When the correction and escape operations are completed, the tunnel boring machine continues to excavate, and continues to enter the soil after breaking the easy-to-excavate structure. The easy-to-excavate structure is set up to facilitate the tunnel boring machine and reduce secondary damage to the cutter head and cutter head.

[0008] Therefore, the tunnel boring machine deviation correction and escape structure provided by the present invention isolates the soil and water around the tunnel boring machine, and can meet the requirements of water stopping, air tightness, safety, construction period and cost for deviation correction and escape by opening the chamber at normal pressure.

[0009] In an optional embodiment of the present application, the cavity defined by the underground continuous wall includes a communicating working cavity and a connecting passage, the working cavity is used to provide a working space for correcting deviations and escaping difficulties, and the connecting passage is used for ventilation and to provide a working space for hoisting materials and for the entry and exit of personnel, so as to facilitate the construction of the underground continuous cavity and ensure that the structure enclosed by the underground continuous wall has sufficient structural strength.

[0010] In an optional embodiment of the present application, the working chamber is a rectangular cavity, and the connecting passage is a rectangular passage, so as to facilitate the construction of the working chamber and the connecting passage.

[0011] In an optional embodiment of the present application, a supporting structure is provided at each corner of the working chamber, and the supporting structure extends along the excavation direction to ensure that the side wall of the working chamber has sufficient structural strength.

[0012] In an optional embodiment of the present application, the sealing structure is made of rubber material to ensure that the sealing structure can be cut by the cutter disc while providing sufficient sealing performance.

[0013] In an optional embodiment of the present application, the main structure of the underground continuous wall is a reinforced concrete structure, and the easy-to-dig structure is a fiber concrete structure, so as to facilitate the cutting of the easy-to-dig structure by the tunnel boring machine while ensuring that the tunnel boring machine's correction and escape structure has sufficient structural strength.

[0014] In an optional embodiment of the present application, a functional bracket is provided on the top of the underground continuous wall, and the functional bracket is used to install a ventilator and lifting equipment, which facilitates the installation of the ventilator, the lifting of materials and the entry and exit of personnel.

[0015] In a second aspect, the present invention provides a method for correcting deviation and escaping from a difficult situation for a roadheader, comprising the following steps:

[0016] S10, constructing the above-mentioned roadheader deviation correction and escape structure in front of the normal pressure deviation correction and escape position of the roadheader;

[0017] S20, continue to excavate, and stop excavating when the cutter head of the tunnel boring machine excavates into the cavity defined by the underground continuous wall;

[0018] S30, adjusting the pressure in the pressure chamber of the tunnel boring machine so that the pressure in the pressure chamber of the tunnel boring machine is consistent with the pressure of the cavity defined by the underground continuous wall;

[0019] S40, carry out normal pressure correction and rescue operations on the tunnel boring machine.

[0020] The method for correcting the deviation and escaping from an obstacle by a tunnel boring machine provided by the present invention builds the above-mentioned structure for correcting the deviation and escaping from an obstacle by a normal pressure, and then performs normal pressure operations in the cavity defined by the underground continuous wall. This method can not only meet the requirements of water stopping, air tightness and safety for the tunnel boring machine's normal pressure opening and correction of the deviation and escape from an obstacle, but also achieve a short construction period and low cost, thereby improving the construction space, construction efficiency and safety for the tunnel boring machine's normal pressure opening and correction of the deviation and escape from an obstacle, and provides a new method for tunnel boring machine normal pressure opening and correction of the deviation and escape projects in soft rock and soil layers.

[0021] Specifically, in S10, the step of constructing the tunnel boring machine correction and escape structure as described in any one of claims 1 to 8 is: using ground machinery to groove the soil, then hanging the skeleton of the tunnel boring machine correction and escape structure into the groove and pouring concrete.

[0022] Specifically, in S20, after the concrete strength of the underground continuous wall reaches the standard, the cavity defined by the underground continuous wall is pumped out, and after the water is pumped out and the pressure of the cavity defined by the underground continuous wall is at normal atmospheric pressure, the tunnel boring machine continues to excavate.

[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0024] 1. The tunnel boring machine deviation correction and escape structure provided by the present invention has an underground continuous wall arranged in front of the tunnel boring machine, and the underground continuous wall defines a closed cavity structure with an upper opening, and the top of the cavity defined by the underground continuous wall is connected to the ground, and can allow the deviation correction and escape operation platform to pass vertically, and at the same time, along the tunneling direction, the underground continuous wall is surrounded by two opposite sides and is provided with a sealing structure and an easy tunneling structure in sequence, and the sealing structure can seal the gap between the tunnel boring machine shield and the underground continuous wall, so that the front of the tunnel boring machine cutter head is isolated through the underground continuous cavity The synchronous sealing structure isolates the shield tail gap behind the cutter head of the tunnel boring machine and the locally over-excavated soil and groundwater, thereby forming a water-free, normal-pressure and safe hollow area in the wall that directly connects to the ground, providing a normal-pressure working space for the tunnel boring machine to correct deviation, escape and repair. The correction and rescue workers can enter the hollow area through the upper opening defined by the underground continuous wall, carry out correction and rescue operations on the inside and outside of the tunnel boring machine, and can also carry out maintenance operations on the shield, cutter and cutter head.

[0025] 2. The tunnel boring machine correction and escape structure provided by the present invention has sealing structures and easy-to-dig structures arranged in sequence on the opposite sides of the underground continuous wall along the digging direction, which is beneficial to the tunnel boring machine and reduces secondary damage to the cutterhead and the tool.

[0026] 3. The method for correcting and escaping a tunnel boring machine provided by the present invention builds the above-mentioned tunnel boring machine correcting and escaping structure in front of the tunnel boring machine normal-pressure correcting and escaping position, and then performs normal-pressure operations in the cavity defined by the underground continuous wall. This can not only meet the requirements of water stopping, air tightness and safety for the tunnel boring machine normal-pressure opening and correction and escape, but also achieve short construction period and low cost, thereby improving the construction space, construction efficiency and safety of the tunnel boring machine normal-pressure opening and correction and escape, and providing a new method for tunnel boring machine normal-pressure opening and correction and escape projects in soft rocks and soil layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application 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 paying creative work.

[0028] In the attached picture:

[0029] Figure 1 It is a structural schematic diagram of a deviation correction and escape structure of a roadheader according to an embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the plane position of the deviation correction and escape structure of the tunnel boring machine according to an embodiment of the present invention;

[0031] Figure 3 This is a cross-sectional view of the working condition along the transverse direction of the tunnel when the cutter head of the tunnel boring machine according to an embodiment of the present invention has excavated to the center of the hollow wall;

[0032] Figure 4 This is a cross-sectional view of the working condition along the longitudinal direction of the tunnel when the cutter head of the tunnel boring machine according to an embodiment of the present invention has excavated to the center of the hollow wall;

[0033] Figure 5 This is a plan view of the working condition when the cutter head of the tunnel boring machine according to an embodiment of the present invention has excavated to the center of the hollow wall;

[0034] Figure 6 The present invention is a schematic flow chart of a method for correcting deviation and escaping distress of a tunnel boring machine according to an embodiment of the present invention.

[0035] Marks and corresponding parts names in the attached drawings:

[0036] 1-Tunnel boring machine cutterhead, 2-underground continuous wall, 3-sealing structure, 4-working chamber, 5-connecting passage, 6-functional support, 7-tunnel segment, 8-grouting body, 9-Tunnel boring machine shield, 10-ventilator, 11-Tunnel boring machine pressure chamber, 12-correction and escape operation platform, 13-easy boring structure, 14-support structure. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0040] In the description of the embodiments of the present application, the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is conventionally placed when in use, or is the orientation or position relationship conventionally understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 on the present application.

[0041] In the description of the present invention, 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example 1

[0043] Combination Figure 1-Figure 5 The present embodiment provides a deviation correction and escape structure for a tunnel boring machine, comprising an underground continuous wall 2 arranged in front of the tunneling direction; the underground continuous wall 2 defines a closed cavity structure with an upper end opening, the top of the cavity defined by the underground continuous wall 2 is communicated with the ground, and the cavity defined by the underground continuous wall 2 can allow a deviation correction and escape operation platform 12 to pass vertically; along the tunneling direction, the underground continuous wall 2 is surrounded by two opposite sides with sealing structures 3 and easy tunneling structures 13 in sequence, and the sealing structures 3 and the easy tunneling structures 13 can both cover the tunneling section, and when the tunnel boring machine cutter head 1 passes through the sealing structures 3, the sealing structures 3 can seal the gap between the tunnel boring machine shield 9 and the underground continuous wall 2.

[0044] Specifically, the cavity defined by the underground continuous wall 2 includes a communicating working chamber 4 and a connecting passage 5. The working chamber 4 is used to provide a working space for correcting deviations and escaping from difficulties, and the connecting passage 5 is used for ventilation and to provide a working space for hoisting materials and for the entry and exit of personnel, so as to facilitate the construction of the underground continuous cavity and ensure that the structure enclosed by the underground continuous wall 2 has sufficient structural strength.

[0045] In this embodiment, the working chamber 4 is a rectangular cavity, and the connecting passage 5 is a rectangular passage, so as to facilitate the construction of the working chamber 4 and the connecting passage 5 .

[0046] On this basis, each corner of the working cavity 4 is provided with a support structure 14, and the support structure 14 extends along the excavation direction to ensure that the side wall of the working cavity 4 has sufficient structural strength. That is to say, internal supports are provided at the four corners of the working cavity 4, such as I-beams.

[0047] It should be understood that the sealing member 3 is made of rubber material to ensure that the sealing member 3 can be cut by the cutter disc while providing sufficient sealing performance. Generally speaking, the sealing member 3 is an annular sheet structure.

[0048] Among them, the main structure of the underground continuous wall 2 is a reinforced concrete structure, and the easy-to-dig structure 13 is a fiber concrete structure. In other words, the underground continuous wall 2 structure of the hollow wall is composed of a reinforced concrete underground wall and a glass fiber reinforced concrete underground wall. It is a hollow structure with four closed sides and a top opening directly connected to the ground, so as to ensure that the tunnel boring machine's deviation correction and escape structure has sufficient structural strength while facilitating the tunnel boring machine to cut the easy-to-dig structure 13. And the cavity defined by the underground continuous wall 2 has the characteristics of strong support, strong waterproof performance, and normal pressure space.

[0049] It can be understood that the reinforced concrete underground wall is outside the excavation range of the tunnel boring machine, and the glass fiber reinforced concrete underground wall is within the excavation range of the tunnel boring machine.

[0050] In this embodiment, the outer dimensions of the underground continuous wall 2 are at least 1.5m larger than the diameter of the tunnel boring machine cutter head 1. At the same time, the size of the glass fiber reinforced concrete underground wall is consistent with the rectangular hollow area in the wall that directly reaches the ground, and is at least 0.3m larger than the diameter of the tunnel boring machine cutter head 1. That is, when the tunnel boring machine cutter head 1 enters the working chamber 4, the distance from the side wall of the tunnel boring machine cutter head 1 to the outside of the underground continuous wall 2 is greater than 1.5mm, and the distance from the side wall of the tunnel boring machine cutter head 1 to the outside of the easy-to-dig structure 13 is greater than 0.3m. In addition, the size of the annular sealing rubber plate is at least 80mm larger than the diameter of the tunnel boring machine cutter head 1 to ensure that the annular sealing rubber plate can fit closely with the tunnel boring machine shield body 9.

[0051] During operation, a functional bracket 6 is supported on the top of the underground continuous wall 2. The functional bracket 6 is used to install the ventilator 10 and lifting equipment. While facilitating the installation of the ventilator 10, it is also convenient for the lifting of materials and the entry and exit of personnel.

[0052] That is to say, in this embodiment, a ventilation device frame and a ventilation device with a hoisting function are arranged on the top of a rectangular ventilation shaft directly connected to the ground. Specifically, the ventilation device is an integrated exhaust blower.

[0053] Meanwhile, the functional support 6 with lifting function includes a ventilation device frame body with lifting function and a lifting hoist on the top of the ventilation device frame with lifting function. The lifting hoist on the top of the ventilation device frame with lifting function is used for lifting of the tunnel boring machine for deviation correction and escape operation.

[0054] Generally, a ventilation device frame with hoisting function includes four vertical beams, four longitudinal beams and four transverse beams. The longitudinal beams and transverse beams are used to fix the integrated exhaust blower.

[0055] In addition, in this embodiment, the underground continuous wall 2 is grooved in the soil by ground machinery, and ordinary steel bars and glass fiber bars are assembled into a hollow steel frame by welding, overlapping or mechanical connection. The hollow steel frame is then sealed with a diaphragm on all sides, and after the sealing structure 3 is embedded and fixed to the steel frame, the whole is hoisted from the ground into the soil groove and poured with concrete.

[0056] In summary, the deviation correction and escape structure of the tunnel boring machine provided in this embodiment has an underground continuous wall 2 arranged in front of the tunnel boring machine, and the underground continuous wall 2 defines a closed cavity structure with an upper opening. The top of the cavity defined by the underground continuous wall 2 is connected to the ground, and can allow the deviation correction and escape operation platform 12 to pass vertically. At the same time, along the tunnel boring direction, the underground continuous wall 2 is surrounded by opposite sides with sealing structures 3 and easy tunnel boring structures 13 in sequence.

[0057] When the tunnel boring machine excavates to the underground continuous wall 2, its cutter head cuts the sealing structure 3 and enters the defined cavity. At this time, the sealing structure 3 can seal the gap between the tunnel boring machine shield body 9 and the underground continuous wall 2, thereby isolating the soil in front of and around the tunnel boring machine cutter head 1 through the underground continuous cavity to prevent the surrounding soil from collapsing and groundwater from entering. At the same time, the sealing structure 3 isolates the shield tail gap behind the tunnel boring machine cutter head 1 and the locally over-excavated soil and groundwater, thereby forming a water-free, normal pressure and safe hollow area in the wall that directly connects to the ground, providing a normal pressure working space for the tunnel boring machine to correct deviation, escape and repair. The correction and escape workers can enter the hollow area through the upper opening defined by the underground continuous wall 2, perform correction and escape operations on the inside and outside of the tunnel boring machine, and can also perform maintenance operations on the shield body, cutter and cutter head.

[0058] Among them, the deviation correction and escape workers can enter and exit the working chamber 4 directly connected to the ground in the wall through the pressure chamber inside the tunnel boring machine, and can also enter and exit the working chamber 4 through the connecting passage 5, so that the deviation correction and escape work can be carried out both inside and outside the tunnel boring machine. The connecting passage 5 and the ventilator 10 can supply and exhaust air to the working chamber 4, and the ventilation device frame with hoisting function on the connecting passage 5 can hoist in and out equipment and workers, and can also evacuate workers in the wall in an emergency, realize ventilation of the working space, and can meet the needs of hoisting equipment, hoisting workers and emergency avoidance.

[0059] After the deviation correction and escape operation is completed, the tunnel boring machine continues to advance, and continues to enter the soil after breaking the easy-to-advance structure 13. The easy-to-advance structure 13 is provided, which is beneficial to the tunnel boring machine and reduces the secondary damage to the cutterhead and the tool.

[0060] It should be noted that the caverns dug in front of the cutter disc, the ground mixing piles, jet grouting piles and sleeve valve pipe grouting technologies under soil conditions cannot meet the strict water-stopping and air-tightness requirements, and the safety risks of opening the warehouse for correction and escape under normal pressure are relatively high. In addition, the cavern technology dug in front of the cutter disc has a small cutter disc gap and cannot provide effective construction space; at the same time, excavating the maintenance caverns without support in the stratum has great safety risks or cannot be implemented.

[0061] In summary, the tunnel boring machine deviation correction and escape structure provided in this embodiment isolates the soil and water around the tunnel boring machine, and can meet the requirements of water stop, air tightness, safety, construction period and cost of normal pressure opening and deviation correction and escape. At the same time, it avoids the dark excavation of the cave in front of the cutter head, and improves the construction efficiency and safety of the tunnel boring machine normal pressure opening and deviation correction and escape.

[0062] Example 2

[0063] Combination Figure 6 This embodiment provides a method for a roadheader to correct deviation and escape from trouble, comprising the following steps:

[0064] S10. Construct the tunnel boring machine deviation correction and escape structure described in Example 1 in front of the tunnel boring machine normal pressure deviation correction and escape position.

[0065] Specifically, the steps for constructing the tunnel boring machine correction and escape structure recorded in Example 1 are as follows: the underground continuous wall 2 is grooved in the soil by ground machinery, and ordinary steel bars and glass fiber bars are assembled into a hollow steel frame by welding, overlapping or mechanical connection. The hollow steel frame is sealed with a diaphragm on all sides, and the annular sealing rubber plate is embedded and fixed to the steel frame, and then the whole is hoisted from the ground into the soil groove and poured with concrete, finally forming a rectangular hollow area directly through the ground.

[0066] S20, continue excavating, and stop excavating when the tunnel boring machine cutter head 1 excavates into the cavity defined by the underground continuous wall 2.

[0067] Specifically, after the concrete strength of the underground continuous wall 2 reaches the standard, the cavity defined by the underground continuous wall 2 is pumped out, and after the water is pumped out and the pressure in the cavity defined by the underground continuous wall 2 is at normal atmospheric pressure, the tunnel boring machine continues to excavate.

[0068] Generally, during the tunneling process of the tunnel boring machine, the synchronous grouting system continuously grouts, so that when the tunnel boring machine cutter head 1 excavates to the center of the rectangular hollow area, the shield tail gap and the cutter head over-excavation gap are filled and compacted by injecting slurry. In this embodiment, the slurry injected by the synchronous grouting system is cement water glass double liquid slurry.

[0069] It can be understood that the tunnel boring machine correction and escape structure recorded in Example 1 is provided with a ventilation device frame and a ventilation device with hoisting function on the top. The ventilation device frame with hoisting function can hoist the correction and escape workers and the correction and escape operation platform 12 into the rectangular hollow area in the wall that directly leads to the ground to carry out correction and escape operations. At the same time, the ventilator 10 can pump and exhaust the working chamber in the wall through the connecting channel 5.

[0070] S30, adjusting the pressure in the pressure chamber 11 of the tunnel boring machine so that the pressure in the pressure chamber 11 of the tunnel boring machine is consistent with the pressure of the cavity defined by the underground continuous wall 2.

[0071] S40, carry out normal pressure correction and rescue operations on the tunnel boring machine.

[0072] It can be understood that the personnel performing the deviation correction and rescue operations can enter and exit the working chamber 4 directly connected to the ground in the wall through the pressure chamber inside the tunnel boring machine, and can also enter and exit the working chamber 4 through the connecting passage 5, so that the deviation correction and rescue operations can be carried out both inside and outside the tunnel boring machine.

[0073] In summary, the method for correcting and escaping a tunnel boring machine provided in this embodiment builds the above-mentioned tunnel boring machine correcting and escaping structure in front of the tunnel boring machine normal-pressure correcting and escaping position, and then performs normal-pressure operations in the cavity defined by the underground continuous wall 2, which can not only meet the requirements of water stopping, air tightness and safety of the tunnel boring machine normal-pressure opening and correction and escape, but also achieve short construction period and low cost, thereby improving the construction space, construction efficiency and safety of the tunnel boring machine normal-pressure opening and correction and escape, and providing a new method for tunnel boring machine normal-pressure opening and correction and escape projects in soft rock and soil layers.

[0074] Among them, this embodiment does not need to drill geological exploration holes in the extension direction of the tunnel, saving investment and reducing the impact on the ground and the surrounding environment. It is also unnecessary to perform grouting reinforcement on the stratum around the shield machine, saving investment and reducing the impact on the ground and the surrounding environment.

[0075] At the same time, the reinforced concrete underground wall is outside the excavation range of the tunnel boring machine, and the glass fiber reinforced concrete underground wall is within the excavation range of the tunnel boring machine, so that the tunnel boring machine excavates in the glass fiber reinforced concrete underground wall with less damage to the cutterhead and the cutting tools, ensuring that the cutterhead and the cutting tools will not be damaged secondary by the maintenance measures during the tunnel boring machine's continued excavation before or after it is rescued for maintenance.

[0076] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A deviation correction and escape structure for a roadheader, characterized in that: It includes an underground continuous wall (2) arranged in front of the excavation direction; The underground continuous wall (2) defines a closed cavity structure with an upper end opening, the top of the cavity defined by the underground continuous wall (2) is in communication with the ground, and the cavity defined by the underground continuous wall (2) can allow a deviation correction and escape operation platform (12) to pass vertically; Along the excavation direction, the underground continuous wall (2) is provided with sealing structures (3) and easy excavation structures (13) in sequence on two opposite sides thereof. The sealing structures (3) and the easy excavation structures (13) can both cover the excavation section. When the excavator cutter head (1) passes through the sealing structures (3), the sealing structures (3) can seal the gap between the excavator shield (9) and the underground continuous wall (2).

2. The deviation correction and escape structure of a roadheader according to claim 1, characterized in that: The cavity defined by the underground continuous wall (2) comprises an interconnected working chamber (4) and a connecting passage (5), wherein the working chamber (4) is used to provide a working space for deviation correction and escape, and the connecting passage is used for ventilation and to provide a working space for hoisting materials and for the entry and exit of personnel.

3. The deviation correction and escape structure of the tunnel boring machine according to claim 2, characterized in that: The working chamber (4) is a rectangular cavity, and the connecting channel (5) is a rectangular channel.

4. The deviation correction and escape structure of a roadheader according to claim 3 is characterized in that: Each corner of the working chamber (4) is provided with a supporting structure (14), and the supporting structure (14) extends along the excavation direction.

5. The deviation correction and escape structure of a roadheader according to claim 1, characterized in that: The sealing structure (3) is made of rubber.

6. The deviation correction and escape structure of a roadheader according to claim 5, characterized in that: The main structure of the underground continuous wall (2) is a reinforced concrete structure, and the easy-to-dig structure (13) is a fiber concrete structure.

7. The deviation correction and escape structure of a roadheader according to claim 1, characterized in that: A functional bracket (6) is supported on the top of the underground continuous wall (2), and the functional bracket (6) is used to install a ventilator (10) and lifting equipment.

8. A method for correcting deviation and escaping from difficulties of a tunnel boring machine, characterized in that: The following steps are involved: S10, constructing a roadheader deviation correction and escape structure as claimed in any one of claims 1 to 7 in front of the normal pressure deviation correction and escape position of the roadheader; S20, continuing to excavate, and stopping the excavation when the excavator cutter head (1) excavates into the cavity defined by the underground continuous wall (2); S30, adjusting the pressure in the pressure chamber (11) of the tunnel boring machine so that the pressure in the pressure chamber (11) of the tunnel boring machine is consistent with the pressure of the cavity defined by the underground continuous wall (2); S40, carry out normal pressure correction and rescue operations on the tunnel boring machine.

9. The method for correcting deviation and escaping from difficulty of a roadheader according to claim 8, characterized in that: In S10, the step of constructing the tunnel boring machine deviation correction and escape structure as described in any one of claims 1 to 8 is: using ground machinery to groove the soil, then hanging the skeleton of the tunnel boring machine deviation correction and escape structure into the groove and pouring concrete.

10. The method for correcting deviation and escaping from difficulties of a roadheader according to claim 9 is installed, characterized in that: In S20, after the concrete strength of the underground continuous wall (2) reaches the standard, the cavity defined by the underground continuous wall (2) is drained, and after the water is drained and the pressure in the cavity defined by the underground continuous wall (2) is at normal atmospheric pressure, the tunnel boring machine continues to excavate.

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