Improved structure of shield tunneling machine for one-time tunneling in large-gradient complex stratum

Abstract

The invention discloses a large-gradient complex stratum one-time tunneling shield machine transformation structure, and belongs to the technical field of shield construction, the large-gradient complex stratum one-time tunneling shield machine transformation structure comprises a cutterhead, a front shield, a plurality of hinged oil cylinders and a middle shield, the cutterhead and the middle shield are located on the two sides of the front shield respectively, the cutterhead is installed on the front shield, and the hinged oil cylinders are circumferentially arranged around the axis of the middle shield; the hinged oil cylinders close to the top of the middle shield are arranged to be upper oil cylinders, the hinged oil cylinders close to the bottom of the middle shield are arranged to be lower oil cylinders, the middle shield is provided with an adjusting mechanism, the adjusting mechanism comprises a plurality of adjusting blocks and adjusting assemblies, and the adjusting blocks correspond to the upper oil cylinders. The adjusting assembly is used for driving the adjusting block to move in the axis direction of the middle shield, one end of each upper oil cylinder is hinged to the adjusting block, the other end of each upper oil cylinder is hinged to the front shield, one end of each lower oil cylinder is hinged to the middle shield, and the other end of each lower oil cylinder is hinged to the front shield. The tunneling effect of the shield tunneling machine on the upper-soft and lower-hard stratum can be guaranteed conveniently.

Description

Technical Field

[0001] The invention relates to the field of shield construction, in particular to a shield machine transformation structure for one-time excavation in complex strata with large slope. Background Art

[0002] During the construction of an undersea water intake tunnel using a shield machine, since the shield machine can only dig forward and not backward, when there is no receiving well to receive the shield machine, it is necessary to dismantle, transport, and hoist the internal structure of the shield machine after digging to the designed length in the undersea tunnel once, and then reserve the shield machine shell in the seabed soil layer, and then use a reinforced concrete wall to seal it behind the shield machine shell.

[0003] The tunneling mechanism of a shield machine usually includes a cutterhead, an articulated cylinder, a front shield and a middle shield, wherein the cutterhead is mounted on the side of the front shield away from the middle shield, and multiple articulated cylinders are circumferentially arranged around the axis of the middle shield. The cylinder body of each articulated cylinder is mounted on the middle shield, and the piston rod is mounted on the front shield, so that the angle of the front shield and the cutterhead can be adjusted by driving different articulated cylinders.

[0004] Due to the uneven hardness distribution of the geological layers on the seabed, which are mainly soft on top and hard on the bottom, the shield machine's cutterhead usually deflects upward during construction, which makes it difficult to ensure the shield machine's excavation effect in the soft upper and hard lower strata. Summary of the invention

[0005] In order to ensure the tunneling effect of the shield machine in the soft upper and hard lower strata, the present application provides a shield machine modification structure for one-time tunneling in large-slope complex strata.

[0006] The present application provides a shield machine transformation structure for single excavation in complex strata with large slopes, which adopts the following technical solutions: A modified structure of a shield machine for single-stage tunneling in complex strata with a large slope comprises a cutter disc, a front shield, an articulated cylinder and a middle shield, wherein the cutter disc and the middle shield are respectively located on both sides of the front shield, and the cutter disc is mounted on the front shield. A plurality of articulated cylinders are circumferentially arranged around the axis of the middle shield, the articulated cylinder close to the top of the middle shield is set as an upper cylinder, and the articulated cylinder close to the bottom of the middle shield is set as a lower cylinder, and the middle shield is provided with an adjustment mechanism, and the adjustment mechanism comprises an adjustment block and an adjustment assembly, and a plurality of adjustment blocks are arranged corresponding to the upper cylinder, and the adjustment assembly is used to drive the adjustment block to move along the axis direction of the middle shield, and one end of each of the upper cylinders is hingedly mounted on the adjustment block and the other end is hingedly mounted on the front shield, and one end of each of the lower cylinders is hingedly mounted on the middle shield and the other end is hingedly mounted on the front shield.

[0007] By adopting the above technical scheme, when the adjusting assembly drives the adjusting block to move along the axial direction of the middle shield, the adjusting block drives the upper oil cylinder to move together, so that it is convenient to achieve more accurate deviation correction of the cutter disc during excavation by increasing the stroke of the upper oil cylinder when the pressure of each articulated oil cylinder remains unchanged, so that the shield machine is not prone to upward deflection of the shield machine cutter disc when drilling in the soft upper and hard lower seabed geological layer, which is beneficial to ensure the excavation effect of the shield machine in the soft upper and hard lower strata.

[0008] Optionally, the adjustment assembly includes an adjustment motor, an adjustment drive rod and an adjustment connecting rod. The adjustment drive rod is rotatably mounted on the middle shield, and the adjustment motor is used to drive the adjustment drive rod to rotate around its own axis. One end of the adjustment connecting rod is eccentrically mounted on the adjustment drive rod, and the other end is rotatably mounted on the adjustment block. The adjustment block slides along the axial direction of the middle shield and fits in the middle shield.

[0009] By adopting the above technical solution, when the adjusting motor drives the adjusting driving rod to rotate, the adjusting connecting rod drives the adjusting block to move along the axis direction of the middle shield. The setting of the adjusting motor makes the movement of the adjusting block along the axis direction of the middle shield convenient and fast.

[0010] Optionally, an adjusting worm is fixedly mounted on the output end of the adjusting motor, an adjusting worm wheel is coaxially fixedly mounted on the adjusting driving rod, and the adjusting worm wheel is meshed with the adjusting worm.

[0011] By adopting the above technical solution, the self-locking effect between the adjusting worm wheel and the adjusting worm is conducive to fully ensuring the stability of the position of the adjusting block after the adjusting connecting rod drives the adjusting block to move along the axis direction of the middle shield.

[0012] Optionally, a plurality of adjusting links and adjusting blocks are provided in one-to-one correspondence, and each of the adjusting links is eccentrically rotatably mounted on the same adjusting drive rod.

[0013] By adopting the above technical solution, it is convenient to adjust the positions of multiple adjustment blocks by driving the rotation of a single adjustment drive rod through an adjustment motor, thereby facilitating further improving the working efficiency of adjusting the positions of each upper oil cylinder.

[0014] Optionally, the adjusting connecting rod includes an adjusting sleeve, an adjusting screw and an adjusting nut, one end of the adjusting sleeve is eccentrically rotatably installed on the adjusting drive rod, the adjusting screw is coaxially penetrated and slidably fitted with the adjusting sleeve, one end of the adjusting screw is rotatably installed on the adjusting block, the adjusting nut is coaxially rotatably installed on the adjusting sleeve, the adjusting screw is penetrated and threadedly fitted with the adjusting nut, and the adjusting sleeve is provided with an adjusting limiter for limiting the rotation of the adjusting screw around its own axis.

[0015] By adopting the above technical scheme, when force is applied to rotate the adjusting nut, the adjusting screw cooperates with the thread of the adjusting nut and moves in the direction close to or away from the adjusting sleeve under the limiting action of the adjusting limit member, thereby realizing the adjustment of the length of the adjusting connecting rod, and then realizing the adjustment of the stroke when the adjusting block drives the upper cylinder to move along the axis of the middle shield. This is conducive to the synchronous adjustment of different strokes of the upper cylinders in different positions according to different excavation conditions, and has strong applicability.

[0016] Optionally, the adjustment limit member includes an adjustment limit block fixedly installed inside the adjustment sleeve, the outer peripheral surface of the adjustment screw is provided with an adjustment limit groove extending along the axial direction of the adjustment screw, and the adjustment limit block is slidably fitted in the adjustment limit groove.

[0017] By adopting the above technical solution, the cooperation between the adjustment limit block and the adjustment limit groove facilitates the convenient and stable rotation of the adjustment screw around its own axis.

[0018] Optionally, the adjusting sleeve is provided with two mounting half rings, one of which is fixedly mounted on one end of the adjusting sleeve close to the adjusting drive rod, and the other mounting half ring is fixedly mounted on the mounting half ring located on the adjusting sleeve by bolts, and the adjusting drive rod is located between the two mounting half rings.

[0019] By adopting the above technical solution, it is easy to achieve the fixation or non-fixation between the adjusting sleeve and the adjusting drive rod, and then it is easy to achieve the linkage or non-linkage between one of the upper cylinders and the adjusting drive rod, which is further convenient for adaptive adjustment to different excavation conditions.

[0020] Optionally, wear-resistant pads are fixedly provided on the adjacent sides of the two mounting half rings.

[0021] By adopting the above technical solution, the provision of the wear-resistant pad is conducive to enhancing the wear resistance between the adjusting drive rod and the mounting half ring when the adjusting sleeve moves, thereby helping to ensure the service life of the adjusting drive rod.

[0022] Optionally, the adjustment block includes an adjustment sliding part and an adjustment fixing part, the adjustment fixing part is fixedly mounted on the adjustment sliding part by bolts, and one end of the adjustment screw is rotatably mounted on the adjustment fixing part by a ball joint.

[0023] By adopting the above technical solution, the ball joint rotation setting makes the adjustment screw more flexible when driving the adjustment seat to move, and the adjustment connecting rod can be easily maintained or replaced by disassembling and assembling the adjustment fixing part, which is beneficial to ensure the performance of the adjustment connecting rod.

[0024] Optionally, the middle shield is fixedly installed with multiple groups of sliding guide rails corresponding to the adjustment seat, each group of sliding guide rails is directly arranged with two, and the two sides of each adjustment sliding part are slidingly matched with the two sliding guide rails of each group.

[0025] By adopting the above technical solution, the sliding guide rail plays a further limiting and guiding role when the adjustment sliding part slides, which is beneficial to further ensure the stability of the adjustment seat when it moves along the axis direction of the middle shield.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. It is convenient to achieve more accurate deviation correction of the cutter head during excavation by increasing the stroke of the upper cylinder while keeping the pressure of each articulated cylinder unchanged, so that the shield machine is not prone to upward deflection of the cutter head when drilling in the soft upper and hard lower seabed geological layer, which is conducive to ensuring the excavation effect of the shield machine in the soft upper and hard lower strata.

[0027] 2. By driving the rotation of a single adjusting drive rod through an adjusting motor, the positions of multiple adjusting blocks can be adjusted synchronously, thereby further improving the working efficiency of adjusting the positions of each upper oil cylinder.

[0028] 3. The setting of the ball joint rotation makes the adjustment screw more flexible when driving the adjustment seat to move, and the adjustment connecting rod can be easily maintained or replaced by disassembling and assembling the adjustment fixing part, which is beneficial to ensure the performance of the adjustment connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a side view schematic diagram of the overall structure of the embodiment of the present application.

[0030] Figure 2 It is a three-dimensional schematic diagram of the overall structure of the embodiment of the present application.

[0031] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A.

[0032] Figure 4 It is a partial cross-sectional schematic diagram of the adjusting connecting rod in the embodiment of the present application.

[0033] Description of reference numerals: 1. Cutter disc; 2. Front shield; 3. Articulated cylinder; 301. Upper cylinder; 302. Lower cylinder; 4. Middle shield; 5. Adjusting motor; 6. Adjusting drive rod; 601. Adjusting main rod; 602. Eccentric rod; 7. Adjusting connecting rod; 701. Adjusting sleeve; 702. Adjusting screw; 703. Adjusting nut; 8. Adjusting worm; 9. Adjusting worm wheel; 10. Connecting plate; 11. Mounting half ring; 12. Wear-resistant pad; 13. Adjusting limit block; 14. Adjusting limit groove; 15. Adjusting block; 151. Adjusting sliding part; 152. Adjusting fixed part; 16. Sliding guide rail. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The present application embodiment discloses a shield machine modification structure for one-time excavation in complex strata with large slopes. Figure 1 The modified structure of the shield machine for single-stage tunneling in complex strata with large slopes includes a cutterhead 1, a front shield 2, an articulated cylinder 3 and a middle shield 4, wherein the cutterhead 1 and the middle shield 4 are respectively located on both sides of the front shield 2, and the cutterhead 1 is rotated on the front shield 2.

[0036] Reference Figure 1 and Figure 2 The articulated oil cylinder 3 is located between the front shield 2 and the middle shield 4. A plurality of articulated oil cylinders 3 are evenly arranged around the axis of the middle shield 4. In the embodiment of the present application, the number of articulated oil cylinders 3 is selected as eight, wherein the four articulated oil cylinders 3 near the top of the middle shield 4 are set as upper oil cylinders 301, and the four articulated oil cylinders 3 near the bottom of the middle shield 4 are set as lower oil cylinders 302. One end of the cylinder body of each lower oil cylinder 302 is hingedly mounted on the middle shield 4, and the other end, i.e., one end of the piston rod, is hingedly mounted on the front shield 2. The middle shield 4 is provided with an adjustment mechanism, which includes an adjustment block 15 and an adjustment assembly, wherein four adjustment blocks 15 are provided in a one-to-one correspondence with the upper cylinders 301, one end of each upper cylinder 301 is hingedly mounted on the adjustment block 15, and the other end, i.e., one end of the piston rod, is hingedly mounted on the front shield 2, and the adjustment assembly is used to drive each adjustment block 15 to move along the axial direction of the middle shield 4, so as to achieve more accurate deviation correction of the cutter head 1 during excavation by increasing the stroke of the upper cylinder 301.

[0037] Reference Figure 1 and Figure 3Specifically, the adjustment component includes an adjustment motor 5, an adjustment drive rod 6 and an adjustment connecting rod 7. The adjustment drive rod 6 is horizontally arranged and rotatably installed on the middle shield 4. The adjustment motor 5 is fixedly installed on the middle shield 4. An adjustment worm 8 is fixedly installed on the output end of the adjustment motor 5. An adjustment worm wheel 9 is coaxially fixedly installed on the adjustment drive rod 6. The adjustment worm 8 is meshed with the adjustment worm wheel 9, so that the adjustment motor 5 drives the adjustment drive rod 6 to rotate through the meshing of the adjustment worm 8 and the adjustment worm wheel 9. At the same time, the self-locking effect between the adjustment worm 8 and the adjustment worm wheel 9 is conducive to ensuring the stability of the adjustment drive rod 6 after rotation.

[0038] Reference Figure 2 and Figure 3 , four adjusting links 7 are arranged one by one corresponding to the adjusting block 15, and each adjusting link 7 is eccentrically rotatably installed on the same adjusting driving rod 6. Specifically, the adjusting driving rod 6 includes an adjusting main rod 601 and an eccentric rod 602, and four eccentric rods 602 are arranged one by one corresponding to the adjusting links 7, the eccentric rod 602 is eccentrically arranged with the adjusting main rod 601, and both ends of the eccentric rod 602 are fixedly installed with connecting plates 10, and each connecting plate 10 is fixedly installed on the adjusting main rod 601, and the two connecting plates 10 at both ends of the eccentric rod 602 cut off the adjusting main rod 601, so that the adjusting link 7 is connected to the eccentric rod 602 to realize the eccentric installation between the adjusting link 7 and the adjusting driving rod 6, and at the same time, it is not easy for the adjusting main rod 601 to interfere with the adjusting link 7 when rotating.

[0039] Reference Figure 3 and Figure 4 Specifically, the adjusting connecting rod 7 includes an adjusting sleeve 701, an adjusting screw 702 and an adjusting nut 703, wherein the adjusting sleeve 701 is provided with two mounting half rings 11, wherein one mounting half ring 11 is fixedly mounted on one end of the adjusting sleeve 701 close to the adjusting driving rod 6, and the other mounting half ring 11 is fixedly mounted on the mounting half ring 11 located on the adjusting sleeve 701 by bolts, wherein an eccentric rod 602 is rotationally matched between the two mounting half rings 11, that is, one end of the adjusting sleeve 701 is eccentrically rotationally mounted on the adjusting driving rod 6. To ensure the service life of the eccentric rod 602, a wear-resistant pad 12 is fixedly provided on one side of the two mounting half rings 11 close to each other, and the material of the wear-resistant pad 12 in the embodiment of the present application is rubber.

[0040] Continue to refer to Figure 3 and Figure 4The adjusting screw 702 is coaxially penetrated and slidably engaged with the end of the adjusting sleeve 701 away from the mounting semi-ring 11, and the adjusting nut 703 is coaxially rotatably mounted on the end of the adjusting sleeve 701 away from the mounting semi-ring 11. The adjusting screw 702 is penetrated and threadedly engaged with the adjusting nut 703. The adjusting sleeve 701 is provided with an adjusting limiter for limiting the rotation of the adjusting screw 702 around its own axis. In the embodiment of the present application, the adjusting limiter includes an adjusting limiter block 13 fixedly mounted inside the adjusting sleeve 701, and an adjusting limiter groove 14 extending along its own axis is provided on the outer peripheral surface of the adjusting screw 702. The adjusting limiter block 13 is slidably engaged in the adjusting limiter groove 14, so that when force is applied to rotate the adjusting nut 703, the adjusting screw 702 moves in a direction close to or away from the adjusting sleeve 701 due to the threaded engagement with the adjusting nut 703 and under the limiting action of the adjusting limiter block 13 and the adjusting limiter groove 14, thereby realizing the adjustment of the length of the adjusting connecting rod 7.

[0041] Reference Figure 3 The adjustment block 15 includes an adjustment sliding part 151 and an adjustment fixing part 152. The adjustment sliding part 151 is arranged along the axis of the middle shield 4 and slides with the middle shield 4. One end of the cylinder body of the upper oil cylinder 301 is rotatably mounted on the end of the adjustment sliding part 151 close to the front shield 2. In order to further ensure the stability of the adjustment block 15 when sliding along the axis of the middle shield 4, four groups of sliding guide rails 16 corresponding to the adjustment seat are fixedly installed on the side of the middle shield 4 away from the front shield 2. Two sliding guide rails 16 are arranged opposite to each other. The two sides of each adjustment sliding part 151 are respectively slidably matched with the two sliding guide rails 16 of each group, so that the sliding guide rails 16 play a further role in limiting the sliding of the adjustment sliding part 151.

[0042] Continue to refer to Figure 3 The adjusting fixing part 152 is fixedly installed on the end of the adjusting sliding part 151 away from the front shield 2 by bolts, and one end of the adjusting screw 702 is rotatably installed on the adjusting fixing part 152 by a ball joint. The setting of the ball joint rotation makes the adjusting screw 702 more flexible when driving the adjusting seat to move, and the adjusting fixing part 152 can be disassembled and assembled by bolts to facilitate the maintenance or replacement of the adjusting connecting rod 7, which is beneficial to ensure the performance of the adjusting connecting rod 7.

[0043] Reference Figure 2 When the adjusting nut 703 is rotated to make the adjusting screw 702 move toward or away from the adjusting sleeve 701, thereby adjusting the length of the adjusting connecting rod 7, the stroke of the upper oil cylinder 301 driven by the adjusting block 15 to move along the axis of the middle shield 4 is adjusted simultaneously, which is conducive to synchronously adjusting the different strokes of the upper oil cylinder 301 at different positions according to different excavation conditions, and has strong applicability.

[0044] In addition, by fixing or not fixing the two mounting half rings 11, it is convenient to realize the linkage or not linkage between one of the upper oil cylinders 301 and the adjustment drive rod 6, so as to further facilitate the adaptive adjustment to different excavation conditions. When the two mounting half rings 11 are released from fixation, the adjustment seat and the middle shield 4 can be fixed by angle steel and bolts, so as to ensure the stability of the position of one of the adjustment seats and the upper oil cylinder 301 after the linkage with the adjustment drive rod 6 is released.

[0045] The implementation principle of the modified structure of a shield machine for single excavation in a large-slope complex stratum according to an embodiment of the present application is as follows: when the adjusting motor 5 drives the adjusting connecting rod 7 to drive the adjusting block 15 to move along the axial direction of the middle shield 4 by driving the rotation of the adjusting worm 8, the adjusting block 15 drives the upper cylinder 301 to move along the axial direction of the middle shield 4, thereby facilitating more accurate deviation correction of the cutter head 1 during excavation by increasing the stroke of the upper cylinder 301 while keeping the pressure of each articulated cylinder 3 unchanged, so that the shield machine is not prone to upward deflection of the cutter head 1 when drilling in a submarine geological stratum that is soft at the top and hard at the bottom, which is beneficial to ensuring the excavation effect of the shield machine in the soft at the top and hard at the bottom stratum.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A shield machine transformation structure for one-time excavation in complex strata with large slope, characterized by: The invention comprises a cutter disc (1), a front shield (2), an articulated oil cylinder (3) and a middle shield (4), wherein the cutter disc (1) and the middle shield (4) are respectively located on both sides of the front shield (2), the cutter disc (1) is mounted on the front shield (2), a plurality of articulated oil cylinders (3) are circumferentially arranged around the axis of the middle shield (4), the articulated oil cylinder (3) close to the top of the middle shield (4) is set as an upper oil cylinder (301), the articulated oil cylinder (3) close to the bottom of the middle shield (4) is set as a lower oil cylinder (302), and the middle shield (4) is set as a An adjustment mechanism is provided, the adjustment mechanism comprising an adjustment block (15) and an adjustment assembly, a plurality of the adjustment blocks (15) are arranged corresponding to the upper oil cylinders (301), the adjustment assembly is used to drive the adjustment block (15) to move along the axis direction of the middle shield (4), one end of each of the upper oil cylinders (301) is hingedly mounted on the adjustment block (15), and the other end is hingedly mounted on the front shield (2), and one end of each of the lower oil cylinders (302) is hingedly mounted on the middle shield (4), and the other end is hingedly mounted on the front shield (2).

2. The shield machine transformation structure for one-time tunneling in complex strata with large slope according to claim 1 is characterized by: The adjustment assembly comprises an adjustment motor (5), an adjustment drive rod (6) and an adjustment connecting rod (7); the adjustment drive rod (6) is rotatably mounted on the middle shield (4); the adjustment motor (5) is used to drive the adjustment drive rod (6) to rotate around its own axis; one end of the adjustment connecting rod (7) is eccentrically rotatably mounted on the adjustment drive rod (6) and the other end is rotatably mounted on the adjustment block (15); the adjustment block (15) is slidably mounted on the middle shield (4) along the axial direction of the middle shield (4).

3. The shield machine transformation structure for one-time excavation in complex strata with large slope according to claim 2 is characterized by: An adjusting worm (8) is fixedly mounted on the output end of the adjusting motor (5), and an adjusting worm wheel (9) is coaxially fixedly mounted on the adjusting drive rod (6), and the adjusting worm wheel (9) is meshed with the adjusting worm (8).

4. The shield machine transformation structure for one-time tunneling in complex strata with large slope according to claim 2 is characterized by: A plurality of the adjusting connecting rods (7) and the adjusting blocks (15) are arranged in a one-to-one correspondence, and each of the adjusting connecting rods (7) is eccentrically rotatably mounted on the same adjusting driving rod (6).

5. The shield machine transformation structure for single excavation in large-slope complex strata according to claim 4 is characterized by: The adjusting connecting rod (7) comprises an adjusting sleeve (701), an adjusting screw (702) and an adjusting nut (703); one end of the adjusting sleeve (701) is eccentrically rotatably mounted on the adjusting driving rod (6); the adjusting screw (702) is coaxially penetrated and slidably engaged with the adjusting sleeve (701); one end of the adjusting screw (702) is rotatably mounted on the adjusting block (15); the adjusting nut (703) is coaxially rotatably mounted on the adjusting sleeve (701); the adjusting screw (702) is penetrated and threadedly engaged with the adjusting nut (703); and the adjusting sleeve (701) is provided with an adjusting limiter for limiting the rotation of the adjusting screw (702) around its own axis.

6. The shield machine transformation structure for single excavation in large-slope complex strata according to claim 5 is characterized by: The adjustment limit member comprises an adjustment limit block (13) fixedly mounted inside the adjustment sleeve (701); an adjustment limit groove (14) extending along the axis direction of the adjustment screw (702) is formed on the outer peripheral surface thereof; and the adjustment limit block (13) is slidably fitted in the adjustment limit groove (14).

7. The shield machine transformation structure for one-time tunneling in complex strata with large slope according to claim 5 is characterized by: The adjusting sleeve (701) is provided with two mounting half rings (11), wherein one mounting half ring (11) is fixedly mounted on one end of the adjusting sleeve (701) close to the adjusting drive rod (6), and the other mounting half ring (11) is fixedly mounted on the mounting half ring (11) located on the adjusting sleeve (701) by means of bolts, and the adjusting drive rod (6) is located between the two mounting half rings (11).

8. The shield machine transformation structure for single excavation in large-slope complex strata according to claim 7 is characterized by: A wear-resistant pad (12) is fixedly arranged on one side of the two mounting half rings (11) that are close to each other.

9. The shield machine transformation structure for one-time tunneling in complex strata with large slope according to claim 5 is characterized by: The adjustment block (15) comprises an adjustment sliding portion (151) and an adjustment fixing portion (152); the adjustment fixing portion (152) is fixedly mounted on the adjustment sliding portion (151) by means of bolts; one end of the adjustment screw rod (702) is rotatably mounted on the adjustment fixing portion (152) by means of a ball joint.

10. The shield machine transformation structure for single excavation in large-slope complex strata according to claim 9 is characterized by: The middle shield (4) is fixedly mounted with a plurality of groups of sliding guide rails (16) arranged corresponding to the adjustment seat, each group of the sliding guide rails (16) is arranged with two oppositely disposed ones, and the two sides of each adjustment sliding part (151) are respectively slidably matched with the two sliding guide rails (16) of each group.

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