Counter-force device for shield launching in limited space and mounting method

Abstract

The invention discloses a counterforce device for shield launching in a confined space, which comprises a cross beam arranged at the top of a tunnel; the stand columns are arranged on the two sides of the tunnel; the ring frame supporting legs are arranged at the bottom of the tunnel; the upper end of a top ring frame of the inner ring frame is connected with the cross beam, the lower end of the inner ring frame is connected with the upper end of a middle ring frame, the middle of the middle ring frame is connected with the stand column, the lower end of the middle ring frame is connected with a bottom ring frame, and the lower end of the bottom ring frame is connected with the ring frame supporting legs; the inclined strut structure comprises a first supporting column and a beam support, one end of the first supporting column is connected with the stand column on the opposite tunneling direction side, the other end of the first supporting column is connected with the first embedded part at the bottom of the tunnel to form an inclined support, one end of the beam support is connected with a cross beam, and the other end of the beam support is connected with the second embedded part at the top of the tunnel. The invention further provides an installation method of the device. On the premise of meeting the strength and rigidity of the counter-force device, the counter-force device has the advantages of being easy to manufacture, convenient to transport, convenient to mount and dismount on site and the like.

Description

Technical Field

[0001] The present invention belongs to the field of shield machine reaction frames, and more specifically, relates to a reaction device and an installation method for a shield machine initiated in a confined space. Background Art

[0002] Shield construction is a construction method that uses a shield machine to excavate a tunnel, which has the advantages of high automation, labor saving, and fast construction speed. When designing the reaction frame device for the shield machine, it is necessary to consider that the external dimensions must not interfere with the various components of the shield machine and the spatial structure of the starting guide tunnel, and ensure that the pipe segment stabilization mechanism on the shield frame passes through the reaction frame device. Existing reaction devices, such as patent announcement number CN113236267B, disclose a shield machine starting reaction device and its use method, including a base frame, a support plate, a gantry, a support column, etc., and the gantry is fixed on the base frame. The device uses the base frame to provide support and reaction force for the gantry. The base frame needs to be larger in size to meet the requirements of providing support and reaction force. However, the space of the tunnel is relatively small, and it is difficult to use large-scale lifting equipment to lift large-size and heavy components, making it difficult to install the reaction device in a confined space. Therefore, it is necessary to develop a reaction device and installation method for the shield machine in a confined space to solve the above problems. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] An object of the present invention is to provide a reaction force device initiated by a confined space shield machine, which, while meeting the strength and rigidity requirements of the reaction force device, has the characteristics of simple manufacture, easy transportation, and convenient on-site installation and disassembly.

[0005] In order to achieve these purposes and other advantages of the present invention, a reaction device initiated by a confined space shield is provided, comprising: A crossbeam, which is set at the top of the tunnel; Pillars, which are set on both sides of the tunnel; Ring frame legs, which are arranged at the bottom of the tunnel; The inner ring frame includes a top ring frame, a middle ring frame and a bottom ring frame, wherein the upper end of the top ring frame is connected to the cross beam, the lower end is connected to the upper end of the middle ring frame, the middle part of the middle ring frame is connected to the column, the lower end of the middle ring frame is connected to the bottom ring frame, and the lower end of the bottom ring frame is connected to the ring frame legs; The diagonal support structure includes a first support column and a beam support, wherein one end of the first support column is connected to a column on the opposite side of the excavation direction, and the other end is connected to a first embedded part at the bottom of the tunnel to form an oblique support, and one end of the beam support is connected to a cross beam, and the other end is connected to a second embedded part at the top of the tunnel.

[0006] Preferably, a third embedded part is provided at the bottom of the tunnel, and the column is connected and fixed to the third embedded part.

[0007] Preferably, a fourth embedded part is arranged in the middle and upper part of the tunnel, the position of the fourth embedded part is opposite to the two ends of the beam, and the two ends of the beam are connected and fixed to the fourth embedded part.

[0008] Preferably, the number of beam supports is three.

[0009] Preferably, three first support columns are arranged on the column.

[0010] Preferably, a fifth embedded part is provided in the middle and upper part of the tunnel, and the upper end of the column is connected to the fifth embedded part through the second supporting column.

[0011] Preferably, the first embedded part, the second embedded part, the third embedded part, the fourth embedded part and the fifth embedded part are all embedded in the secondary lining concrete of the starting tunnel.

[0012] Preferably, the first embedded part, the second embedded part, the third embedded part, the fourth embedded part and the fifth embedded part all include connecting steel plates, embedded steel bars and shear plates, the embedded steel bars are of an L-shaped structure, the vertical portion of the embedded steel bars is vertically connected to the connecting steel plate, one end of the shear plate is connected to the connecting steel plate, and the side of the shear plate is connected to the embedded steel bars.

[0013] Preferably, the first support column, the second support column and the beam support are all rolled from steel plates into an elliptical cross-section structure, and the columns and beams are welded from steel plates into a tic-tac-toe shape.

[0014] The installation method of the reaction device initiated by the confined space shield includes the following steps: S1: When the tunnel is subjected to secondary concrete lining, the first embedded part, the second embedded part, the third embedded part, the fourth embedded part, the fifth embedded part and the sixth embedded part are embedded; S2: According to the design requirements, the cross beam, column, first support column, second support, beam support, top ring frame, middle ring frame and bottom ring frame are welded by steel plates. The top ring frame is welded to the cross beam outside the tunnel, the left column is welded to the left middle ring frame, and the right column is welded to the right middle ring frame; S3: Use a hand chain hoist to use the sixth embedded part as the lifting point to hoist the beam and the top ring frame. The two ends of the beam are designed with grooves. The grooves of the beam are welded and fixed to the fourth embedded parts on both sides of the tunnel. S4: Use a hand chain hoist to hoist the left column and the left middle ring frame, the right column and the right middle ring frame, weld the bottom of the left column to the third embedded part on the left, weld the upper end of the left column to the fifth embedded part on the left through the second support column on the left, weld the bottom of the right column to the third embedded part on the left, and weld the upper end of the right column to the fifth embedded part on the right through the second support column on the right; S5: Use bolts to connect the upper end of the middle ring frame to the top ring frame; S6: Use a hand chain hoist to hoist the bottom ring frame, weld the lower end of the bottom ring frame to the ring frame legs, and bolt the upper end of the bottom ring frame to the lower end of the middle ring frame; S7: Install the beam support, one end of the beam support is welded and fixed to the crossbeam, and the other end is welded and fixed to the second embedded part on the top of the tunnel; install the first support column, one end of the first support column is welded to the side of the column in the opposite direction of excavation, and the other end is welded to the first embedded part at the bottom of the tunnel to form an inclined support.

[0015] The present invention includes at least the following beneficial effects: First, the present invention is composed of two side columns, a crossbeam, a top ring frame, a middle ring frame and a bottom ring frame, a first support column and a beam support, embedded parts and ring frame legs, etc., and each component can be hoisted by a hand winch in a confined space, which simplifies the installation process, improves the construction efficiency, and solves the problem that the existing reaction force device is difficult to install and use under space-constrained conditions. Second, the first support column and beam support of the present invention are rolled into an elliptical shape using Q355B steel plates, and the length can be adjusted to meet the needs of different tunnel sizes. The Q355B steel plate has good welding performance and mechanical properties, which ensures the strength and durability of the device. Third, the embedded parts of the present invention are implemented simultaneously with the secondary lining concrete, and the tail of the embedded parts is set to a hook shape, which enhances the connection stability between the device and the tunnel structure. Fourth, the device of the present invention reduces the amount of material used through optimized design, and simplifies the installation and disassembly process, which helps to reduce construction costs. Fifth, the crossbeam of the present invention is welded to the middle and upper part of the tunnel through the fourth embedded part, and a beam support is set on the crossbeam, so that the reaction force can be distributed more evenly on the crossbeam; the bottom of the column is welded to the third embedded part, and the first support column and the second support column are set on the side, so that the reaction force can be distributed more evenly on the column; the bottom ring frame is fixed to the ring frame legs, so that the reaction force can be distributed more evenly on the bottom ring frame. Therefore, under the action of the beam support, the first support column, the second support column, etc., the total reaction force can be evenly distributed to the reaction force device, so that the reaction force device can withstand a total reaction force of up to 15000KN.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a technical solution structure of the device of the present invention; Figure 2 is a schematic diagram of the cross-sectional structure of a column; Figure 3 It is a structural schematic diagram of embedded parts; Figure 4 It is a structural schematic diagram of the adjustment structure; Figure 5 This is a structural schematic diagram of a technical solution that uses an adjustment structure to temporarily fix the beam.

[0018] 1. Crossbeam; 2. Upright column; 3. Ring frame legs; 4. Middle ring frame; 5. Bottom ring frame; 6. First support column; 7. Beam support; 8. First embedded part; 9. Second embedded part; 10. Third embedded part; 11. Fourth embedded part; 12. Fifth embedded part; 13. Second support column; 14. Connecting steel plate; 15. Shear plate; 16. Embedded steel bars; 17. First connecting shaft; 18. First connecting arm; 19. First screw rod; 20. First adjusting block; 21. Support plate; 22. Connecting plate; 23. Sliding rod; 24. Second screw rod; 25. Second adjusting block; 26. Sliding block; 27. Top ring frame; 28. Fixed cylinder. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0021] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense. For example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in an integral manner. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The orientations or positional relationships indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do 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 invention.

[0022] like Figure 1-5 As shown, the present invention provides a reaction force device initiated by a confined space shield, which comprises: A crossbeam 1, which is arranged at the top of the tunnel; Columns 2, which are arranged on both sides of the tunnel; Ring frame legs 3, which are arranged at the bottom of the tunnel; The inner ring frame includes a top ring frame 27, a middle ring frame 4 and a bottom ring frame 5. The upper end of the top ring frame 27 is connected to the cross beam, the lower end is connected to the upper end of the middle ring frame 4, the middle of the middle ring frame 4 is connected to the column, the lower end of the middle ring frame 4 is connected to the bottom ring frame 5, and the lower end of the bottom ring frame 5 is connected to the ring frame legs; The diagonal bracing structure includes a first support column 6 and a beam support 7, wherein one end of the first support column 6 is connected to the side of the column 2 in the opposite direction of excavation, and the other end is connected to the first embedded part 8 at the bottom of the tunnel to form an oblique support, and one end of the beam support 7 is connected to the cross beam 1, and the other end is connected to the second embedded part 9 at the top of the tunnel.

[0023] In this technical solution, the crossbeam 1 can be welded into a "well" shape with a cross-sectional size of 600mm×400mm using Q355B steel plates, and the left and right sides are grooved so as to be connected to the top of the tunnel. The column 2 can be welded into a "well" shape with a cross-sectional size of 700mm×600mm using Q355B steel plates. A column is set on each side of the tunnel, and the lower part of the column is connected to the bottom of the tunnel. The ring frame legs 3 can be welded into a "well" shape with a Q355B steel plate, the lower part is connected to the bottom of the tunnel, and the upper part is welded to the internal ring frame. The number of ring frame legs can be 2, which are arranged at equal intervals below the bottom ring frame. The top ring frame 27, the middle ring frame 4 and the bottom ring frame 5 can all be welded into a "well" shape with a cross-sectional size of 600mm×400mm using Q355B steel plates. After the middle ring frame 4 is embedded in the well-shaped opening of the column 2, it is welded to the column 2. The upper end of the top ring frame 27 is welded to the crossbeam, and the lower end is connected to the middle ring frame 4 by bolts, that is, the lower end of the top ring frame 27 and the upper end of the middle ring frame 4 are both provided with flanges to realize the bolt connection between the top ring frame 27 and the middle ring frame 4. The middle ring frame 4 is connected to the bottom ring frame 5 by bolts. More specifically, the middle ring frame includes a left middle ring frame and a right middle ring frame, the left middle ring frame is welded to the left column as a whole, and the right middle ring frame is welded to the right column as a whole; after the left middle ring frame and the left column, the right middle ring frame and the right column are transported to the installation point, the left middle ring frame and the left column, the right middle ring frame and the right column can be hoisted in a limited space by a hand winch; the top ring frame is welded to the crossbeam as a whole so that the top ring frame and the crossbeam can be transported to the installation point at the same time, and the top ring frame and the crossbeam can be hoisted at the same time in a limited space by a hand winch, a first flange is set at both ends of the middle ring frame, a second flange is set at both ends of the top ring frame, and a third flange is set at both ends of the bottom ring frame, so that the middle ring frame and the top ring frame can be connected by bolts, and the bottom ring frame and the middle ring frame can be connected by bolts. In the present invention, the left middle ring frame is connected to the left column, the right middle ring frame is connected to the right column, and the top ring frame is connected to the cross beam by welding, which makes full use of the characteristics of prefabricated parts, reduces the number of hoisting parts, and also reduces the workload of on-site installation; the top ring frame is connected to the middle ring frame by bolts, and the middle ring frame is connected to the bottom ring frame, which is convenient for connection and can reduce the processing accuracy of the parts and increase the convenience of processing. The first support column 6 and the beam support 7 can both be rolled into an ellipse with Q355B steel plate, the major axis of the ellipse is 590mm, the minor axis of the ellipse is 300mm, and the length of the ellipse column is 1736mm~5034mm. The cross-sectional size of the first embedded part 8 is 900mm×600mm. At least three first support columns are arranged on each side column, and the three first support columns are parallel to each other and tilted to support the column, which can provide a relatively uniform reaction force for the column. At least three beam supports are provided, and the connection points of the three beam supports and the cross beam are relatively evenly distributed on the cross beam, which can provide a relatively uniform reaction force for the cross beam. The cross-sectional size of the second embedded part 9 is 700mm×600mm.

[0024] The present invention reasonably designs the size and weight of each component in the reaction device, and meets the requirements of being easy to hoist in a confined space while meeting the requirements of being able to bear force. The present invention can also reduce the workload of on-site operations when prefabricating and welding the corresponding components, and also realizes that each component can be hoisted in a confined space using a hand chain hoist, avoiding the use of large hoisting equipment.

[0025] In another technical solution, a third embedded part 10 is provided at the bottom of the tunnel, and the column 2 is connected and fixed to the third embedded part 10. The cross-sectional size of the third embedded part 10 is 900 mm×600 mm, and the column 2 can be welded to the third embedded part 10. By providing the third embedded part, the column and the third embedded part can be quickly welded or screwed and fixed, and the force of the column can be more evenly transmitted to the bottom of the tunnel.

[0026] In another technical solution, a fourth embedded part 11 is provided in the middle and upper part of the tunnel, and the fourth embedded part 11 is located opposite to the two ends of the beam 1, and the two ends of the beam 1 are connected and fixed to the fourth embedded part 11. The beam 1 is a groove type so as to be connected with the fourth embedded part 11. Through the fourth embedded part, the beam and the fourth embedded part can be quickly connected, and the force at the two ends of the beam can be transmitted to the tunnel through the fourth embedded part.

[0027] In some technical solutions, the position adjustment structure can be used to temporarily fix the position of the cross beam and the fourth embedded part to facilitate welding of the cross beam and the fourth embedded part, such as Figure 4 As shown, the positioning structure includes: A fixing cylinder 28, which is fixedly arranged on the top of the fourth embedded part, and the fixing cylinder 28 is parallel to the tunnel direction; a connecting member, which includes a first connecting shaft 17 and a first connecting arm 18, the first connecting arm 18 is an L-shaped structure, one end of the first connecting shaft 17 is connected to the vertical part of the first connecting arm 18, the first connecting shaft 17 is perpendicular to the first connecting arm 18, and is located on the side opposite to the horizontal part of the first connecting arm 18, the free end of the first connecting shaft 17 is provided with a thread, and the first connecting shaft 17 passes through the fixing cylinder 28 and is connected with a nut to prevent the first connecting shaft 17 from slipping out of the fixing cylinder 28; A first adjusting member, comprising a first screw 19, a first adjusting block 20 and a supporting plate 21, wherein the first screw 19 is connected to the transverse portion of the first connecting arm 18, the first screw 19 is perpendicular to the transverse portion of the first connecting arm 18, a first connecting hole is provided at one end of the first adjusting block 20, and a second connecting hole is provided at the other end, the first connecting hole and the second connecting hole are perpendicular to each other, the first screw 19 passes through the first connecting hole and is connected to a nut, the rotation of the nut can drive the first adjusting block 20 to approach the transverse portion of the first connecting arm 18, a second connecting shaft is provided at one end of the supporting plate 21, the second connecting shaft passes through the second connecting hole so that the supporting plate 21 and the first adjusting block 20 can be rotatably connected; The second adjusting member includes two connecting plates 22, a slider 26, a second adjusting block 25, a sliding rod 23 and a second screw 24. The two connecting plates 22 are arranged at both ends of the support plate 21, the sliding rod 23 is arranged between the two connecting plates 22, and the second screw 24 is rotatably arranged in the middle of the two connecting plates 22. The slider 26 is provided with a third connecting hole and a threaded hole. The sliding rod 23 passes through the third connecting hole so that the slider 26 and the sliding rod 23 are slidably matched. The second screw 24 passes through the threaded hole and is threadedly connected with the threaded hole. When the second screw rod 24 rotates, the slider 26 can be driven to slide back and forth on the sliding rod 23. The second adjusting block 25 is provided with a slot corresponding to the middle and upper part of the slider 26. The second adjusting block 25 can be fixed on the top of the slider 26 by the slot. The upper surface of the slider 26 is lower than the upper surface of the support plate 21 to avoid the cross beam hindering the sliding of the slider 26. After the second adjusting block 25 is engaged with the slider 26, the upper surface of the second adjusting block 25 is higher than the upper surface of the support plate 21 so that the second adjusting block 25 can abut against the cross beam to drive the cross beam to move. When the crossbeam on the support plate 21 needs to be moved forward, the second adjusting block 25 is removed from the slider 26, the second screw 24 is rotated to move the slider 26 to the rear of the crossbeam, the second adjusting block 25 is clamped on the slider 26, the second screw 24 is rotated to drive the slider 26 to move forward, and then the crossbeam is driven forward by the second adjusting block 25; When the cross beam on the support plate 21 needs to be moved backward, the second adjusting block 25 is removed from the slider 26, the second screw 24 is rotated to move the slider 26 to the front of the cross beam, the second adjusting block 25 is clamped on the slider 26, the second screw 24 is rotated to drive the slider 26 to move backward, and then the cross beam is driven to move backward through the second adjusting block 25.

[0028] When the hand chain hoist is used to hoist the beam, it is difficult to adjust the position of the beam due to its heavy weight. The positioning structure of the present invention can assist in the rapid positioning and welding of the beam and the fourth embedded part. Specifically, the hand chain hoist is used to hoist the beam to the position of the fourth embedded part, the first connecting shaft 17 passes through the fixed cylinder 28, the support plate is supported under the beam, the height position of the beam can be adjusted by rotating the nut, the position of the slider 26 can be adjusted by rotating the second screw 24, and the front and rear position of the beam can be adjusted by using the second adjustment block 25, thereby realizing the adjustment of the beam in two dimensions, vertical and horizontal, and realizing the positioning and installation of the beam and the fourth embedded part.

[0029] In another technical solution, the number of the beam supports 7 is 3. The beam supports 7 are evenly spaced and distributed on the cross beam 1 so that the cross beam 1 is subjected to uniform force.

[0030] In another technical solution, three first support columns 6 are arranged on each side column 2. Three first support columns 6 are arranged on each side column 2, and the three first support columns 6 are arranged parallel to each other.

[0031] In another technical solution, a fifth embedded part 12 is provided in the middle and upper part of the tunnel, and the upper end of the column 2 is connected to the fifth embedded part 12 through a second support column 13. The connection position of the second support column 13 and the column 2 is higher than the connection position of the first support column 6 and the column 2. The cross-sectional size of the fifth embedded part 12 is 700 mm×600 mm.

[0032] In another technical solution, the first embedded part 8, the second embedded part 9, the third embedded part 10, the fourth embedded part 11, and the fifth embedded part 12 are all embedded in the secondary lining concrete of the starting hole. Each embedded part is embedded in the secondary lining concrete to stabilize the force.

[0033] In another technical solution, the first embedded part 8, the second embedded part 9, the third embedded part 10, the fourth embedded part 11, and the fifth embedded part 12 all include a connecting steel plate 14, embedded steel bars 16, and a shear plate 15. The embedded steel bars 16 are of an L-shaped structure. The vertical part of the embedded steel bars 16 is vertically welded to the connecting steel plate 14. One end of the shear plate 15 is welded to the connecting steel plate 14, and the side of the shear plate 15 is connected to the embedded steel bars 16. The connecting steel plate 14 is located on the surface of the secondary lining concrete. The embedded steel bars 16 and the shear plate 15 are both buried in the secondary lining concrete. The thickness of the secondary lining concrete is 50 mm. The columns, beams, first support columns, second support columns, etc. are welded and fixed to the connecting steel plate.

[0034] In another technical solution, the first support column 6, the second support and the beam support 7 are all rolled from steel plates to have an elliptical cross-section structure, and the column 2 and the crossbeam 1 are welded from steel plates into a tic-tac-toe shape. The first support column 6, the second support and the beam support 7 are rolled from Q355B steel plates into an elliptical shape, and the length is adjustable to meet the needs of different tunnel sizes.

[0035] The installation method of the reaction device initiated by the confined space shield includes the following steps: S1: When the tunnel is subjected to secondary concrete lining, the first embedded part, the second embedded part, the third embedded part, the fourth embedded part, the fifth embedded part and the sixth embedded part are embedded; S2: According to the design requirements, the cross beam, column, first support column, second support, beam support, top ring frame, middle ring frame and bottom ring frame are welded by steel plates. The top ring frame is welded to the cross beam outside the tunnel, the left column is welded to the left middle ring frame, and the right column is welded to the right middle ring frame; S3: Use a hand chain hoist to use the sixth embedded part as the lifting point to hoist the beam and the top ring frame. The two ends of the beam are designed with grooves. The grooves of the beam are welded and fixed to the fourth embedded parts on both sides of the tunnel. S4: Use a hand chain hoist to hoist the left column and the left middle ring frame, the right column and the right middle ring frame, weld the bottom of the left column to the third embedded part on the left, weld the upper end of the left column to the fifth embedded part on the left through the second support column on the left, weld the bottom of the right column to the third embedded part on the left, and weld the upper end of the right column to the fifth embedded part on the right through the second support column on the right; S5: Use bolts to connect the upper end of the middle ring frame to the top ring frame; S6: Use a hand chain hoist to hoist the bottom ring frame, weld the lower end of the bottom ring frame to the ring frame legs, and bolt the upper end of the bottom ring frame to the lower end of the middle ring frame; S7: Install the beam support, one end of the beam support is welded and fixed to the crossbeam, and the other end is welded and fixed to the second embedded part on the top of the tunnel; install the first support column, one end of the first support column is welded to the side of the column in the opposite direction of excavation, and the other end is welded to the first embedded part at the bottom of the tunnel to form an inclined support.

[0036] The present invention embeds the first embedded part, the second embedded part, the third embedded part, the fourth embedded part, the fifth embedded part and the sixth embedded part during the secondary concrete lining, and the structure is firm and can meet the reaction force required by the reaction device. The various components are reasonably designed so that some components can be welded together in advance outside the tunnel, which meets the requirements of transportation and hoisting in confined spaces, reduces on-site assembly procedures, and improves installation efficiency.

[0037] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. The reaction device initiated by the confined space shield is characterized by: include: A crossbeam, which is set at the top of the tunnel; Pillars, which are set on both sides of the tunnel; Ring frame legs, which are arranged at the bottom of the tunnel; An internal ring frame, comprising a top ring frame, a middle ring frame and a bottom ring frame, wherein the upper end of the top ring frame is connected to the cross beam, the lower end is connected to the upper end of the middle ring frame, the middle of the middle ring frame is connected to the column, the lower end of the middle ring frame is connected to the bottom ring frame, and the lower end of the bottom ring frame is connected to the ring frame legs; The diagonal support structure includes a first support column and a beam support, wherein one end of the first support column is connected to a column on the opposite side of the excavation direction, and the other end is connected to a first embedded part at the bottom of the tunnel to form an oblique support, and one end of the beam support is connected to a cross beam, and the other end is connected to a second embedded part at the top of the tunnel.

2. The reaction force device initiated by the confined space shield according to claim 1 is characterized in that: A third embedded part is arranged at the bottom of the tunnel, and the column is connected and fixed to the third embedded part.

3. The reaction force device initiated by the confined space shield according to claim 1 is characterized in that: A fourth embedded part is arranged in the middle and upper part of the tunnel, the position of the fourth embedded part is opposite to the two ends of the cross beam, and the two ends of the cross beam are connected and fixed to the fourth embedded part.

4. The reaction force device initiated by a confined space shield according to claim 1, characterized in that: The number of beam supports is 3.

5. The reaction force device initiated by a confined space shield according to claim 1, characterized in that: Three first supporting columns are arranged on each side of the column.

6. The reaction force device initiated by a confined space shield according to claim 1, characterized in that: A fifth embedded part is arranged in the middle and upper part of the tunnel, and the upper end of the column is connected to the fifth embedded part through a second supporting column.

7. The reaction force device initiated by a confined space shield according to claim 1, characterized in that: The first embedded part and the second embedded part are both embedded in the secondary lining concrete of the starting tunnel.

8. The reaction force device initiated by a confined space shield according to claim 1, characterized in that: The first embedded part and the second embedded part both include a connecting steel plate, embedded steel bars and a shear plate. The embedded steel bars are of an L-shaped structure. The vertical portion of the embedded steel bars is vertically connected to the connecting steel plate. One end of the shear plate is connected to the connecting steel plate. The side portion of the shear plate is connected to the embedded steel bars.

9. The reaction force device initiated by a confined space shield according to claim 1, characterized in that: The first support column, the second support column and the beam support are all made of rolled steel plates into an elliptical structure in cross section, and the columns and beams are welded into a tic-tac-toe shape by steel plates.

10. A method for installing a reaction force device initiated by a confined space shield machine, characterized in that: The following steps are involved: S1: When the tunnel is subjected to secondary concrete lining, the first embedded part, the second embedded part, the third embedded part, the fourth embedded part, the fifth embedded part and the sixth embedded part are embedded; S2: According to the design requirements, the cross beam, column, first support column, second support, beam support, top ring frame, middle ring frame and bottom ring frame are welded by steel plates. The top ring frame is welded to the cross beam outside the tunnel, the left column is welded to the left middle ring frame, and the right column is welded to the right middle ring frame; S3: Use a hand chain hoist to use the sixth embedded part as the lifting point to hoist the beam and the top ring frame. The two ends of the beam are designed with grooves. The grooves of the beam are welded and fixed to the fourth embedded parts on both sides of the tunnel. S4: Use a hand chain hoist to hoist the left column and the left middle ring frame, the right column and the right middle ring frame, weld the bottom of the left column to the third embedded part on the left, weld the upper end of the left column to the fifth embedded part on the left through the second support column on the left, weld the bottom of the right column to the third embedded part on the left, and weld the upper end of the right column to the fifth embedded part on the right through the second support column on the right; S5: Use bolts to connect the upper end of the middle ring frame to the top ring frame; S6: Use a hand chain hoist to hoist the bottom ring frame, weld the lower end of the bottom ring frame to the ring frame legs, and bolt the upper end of the bottom ring frame to the lower end of the middle ring frame; S7: Install the beam support, one end of the beam support is welded and fixed to the crossbeam, and the other end is welded and fixed to the second embedded part on the top of the tunnel; install the first support column, one end of the first support column is welded to the side of the column in the opposite direction of excavation, and the other end is welded to the first embedded part at the bottom of the tunnel to form an inclined support.

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