Method for installing shield screw conveyor in narrow space

Abstract

The invention relates to a method for installing a shield screw conveyor in a narrow space. The method comprises the following steps that trial assembly of a screw conveyor rotating tool is conducted; the forklift is hoisted to the underground position and parked in the transverse channel, and the rotary tool is hoisted to the underground position; the turning tool is pulled into the transverse channel through a forklift, and then the folding arm is hoisted to a starting well; the screw conveyor is hoisted to a starting well and is hoisted to a swivel translation vehicle through a folding arm crane, the swivel tool and the screw conveyor are integrally translated to a starting section inlet through a forklift, a front middle shield entering the starting section inlet in advance is pushed to a starting hole by a certain distance, then swivel of the screw conveyor is conducted, and the swivel of the screw conveyor is completed. And the posture of the screw conveyor is adjusted by utilizing a folding arm crane and an electric hoist, so that the screw conveyor is mounted on the shield body. The problems of limited operation space, hoisting instability, mechanical collision and the like can be effectively solved, the assembly efficiency of the shield tunneling machine can be effectively improved, the construction period is shortened, and the construction cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel construction, in particular to a method for installing a shield screw conveyor in a narrow space. BACKGROUND

[0002] Due to the large size of the shield machine, hoisting and assembling of shield machine components in a narrow space is difficult. Especially the large-size component of the screw conveyor, which often needs multiple hoisting and body turning steps in the shield machine starting assembly process, its installation difficulty is more prominent in the narrow dark hole space.

[0003] The conventional technology generally pre-buries multiple lifting points in the dark hole, and completes multiple hoisting and body turning through manual operation. However, the process has high risks such as lifting point failure, mechanical collision, screw conveyor damage, and low work efficiency. SUMMARY

[0004] The purpose of the present application is to provide a method for installing a shield screw conveyor in a narrow space, which can effectively solve the problems of limited working space, hoisting instability, mechanical collision, etc., and can effectively improve the assembly efficiency of the shield machine, shorten the construction period and reduce the construction cost.

[0005] In order to achieve the above-mentioned purpose, the present application provides a method for installing a shield screw conveyor in a narrow space, comprising the following steps: Simulate the installation process of the screw conveyor, and perform trial assembly of the screw conveyor body turning tooling on the ground; The body turning tooling comprises a support system, a shield jacking and translation seat, and a body turning and translation vehicle, the body turning and translation vehicle comprises a moving platform, a slewing bearing and a rotating platform, and the moving platform can move along the track of the shield jacking and translation seat; Hoist the forklift into the underground and park it in the cross channel, hoist the body turning tooling into the underground and place it in the starting well centerline position; Use the forklift to pull the body turning tooling into the cross channel, and then hoist the knuckle boom crane into the starting well; After welding the support frame at the bottom of the screw conveyor, hoist it into the starting well, hoist the screw conveyor onto the body turning and translation vehicle by the knuckle boom crane, and use the forklift to translate the body turning tooling and the screw conveyor as a whole to the starting section entrance, so that the front end of the screw conveyor is flush with the edge on the side away from the starting well of the starting section entrance; Push the front and middle shields, which have been previously entered into the starting section entrance, a distance towards the starting hole, and then perform body turning of the screw conveyor. When the screw conveyor is rotated to the maximum angle, move the body turning and translation vehicle towards the starting section, so that the screw conveyor is close to the starting section entrance. Continue to rotate and translate the screw conveyor in this way until the body turning and translation vehicle in the body turning tooling moves to the edge of the shield jacking and translation seat, so that the rotating platform rotates the screw conveyor to the maximum extent; Remove the support frame, adjust the attitude of the screw machine by using the folding arm crane and electric hoist, make the front shield retreat in the direction away from the entrance of the starting section by using the jack, make the screw machine passively enter the shield body for connection, and complete the installation of the screw machine on the shield body.

[0006] In an optional embodiment, the installation process of the screw machine is simulated by the BIM technology, the installation path, the rotation angle and the translation step of the screw machine are planned, and the trial assembly of the screw machine rotation and translation device is performed. The trial assembly includes the installation of the support system, the installation of the shield jacking and translation seat above the support system, and the installation of the rotation and translation vehicle on the shield jacking and translation seat. The installation of the rotation and translation vehicle includes the installation of the moving platform on the shield jacking and translation seat, the installation of the slewing bearing on the moving platform, and the installation of the rotating platform above the slewing bearing.

[0007] In an optional embodiment, the support system includes support legs, cross braces and inclined braces, the upper and lower support legs are connected by bolts, the two support legs on the same side are connected by the cross braces and the inclined braces, the two support legs on the opposite sides are connected by the cross braces, and the cross braces, the inclined braces and the support legs are connected by bolts. The shield jacking and translation seat includes a translation bracket, the translation bracket is connected to the support legs by bolts, and a guide rail for the movement of the moving platform is arranged on the translation bracket.

[0008] In an optional embodiment, the bottom of the moving platform is provided with walking wheels capable of moving along the guide rail, the slewing bearing is welded on the moving platform, and the rotating platform is installed on the slewing bearing to provide a placement plane for the screw machine.

[0009] In an optional embodiment, when the rotation and translation device is lifted, the support system, the shield jacking and translation seat and the rotation and translation vehicle are lifted in sequence, the rotation and translation device is installed according to the trial assembly on the ground, the center line of the moving platform is aligned with the center line of the starting shaft, the moving platform of the rotation and translation vehicle is welded and connected to the shield jacking and translation seat by using a steel plate, and the installed rotation and translation device is towed into the cross passage by a forklift.

[0010] In an optional embodiment, when the folding arm crane is lifted, the folding arm crane is first lifted to one side of the starting shaft to reserve space for the screw machine to be lowered into the shaft, the screw machine with the support frame welded at the bottom is then lifted into the starting shaft, and the lifting points of the screw machine are arranged according to the center of gravity and the length of the screw machine. The screw machine is lifted in an inclined state, is adjusted to a horizontal state when the screw machine reaches the height range of the cross passage, and is stably lowered into the starting shaft on the other side of the folding arm crane.

[0011] In an optional embodiment, the screw machine is hoisted on the rotating platform of the rotating and translating vehicle by the folding arm crane, and the support frame is welded and fixed with the rotating platform; After the whole rotating and translating vehicle and the screw machine are translated to the entrance of the starting section, the welding and fixing between the moving platform of the rotating and translating vehicle and the pushing and translating seat of the shield are released.

[0012] In an optional embodiment, the distance by which the front and middle shield is pushed towards the starting hole entrance is greater than the length of the screw machine minus the width of the cross passage, thereby reserving space for the rotation of the screw machine.

[0013] In an optional embodiment, during the rotation, the rotation angle of the screw machine when the side end thereof away from the entrance of the starting section contacts with the side wall of the cross passage is the maximum rotation angle of the screw machine. The translation of the moving platform at the entrance of the starting section on the pushing and translating seat of the shield drives the slewing bearing, the rotating platform and the screw machine to translate towards the entrance of the starting section, so that the side end of the screw machine is away from the side wall of the cross passage, thereby reserving space for the next rotation, until the moving platform moves to the edge of the pushing and translating seat of the shield.

[0014] In an optional embodiment, after the rotation of the screw machine, the screw machine is adjusted by the folding arm crane, an electric hoist is arranged on the hook of the folding arm crane to adjust the posture of the screw machine, the screw machine is hoisted by the folding arm crane and the electric hoist at different hoisting points, and the screw machine is moved towards the shield until the screw machine is close to the shield. After the adjustment of the posture of the screw machine is completed, the shield is gradually retreated in the reverse pushing manner by means of the rail clamping jack, and with the retreat of the shield, the screw machine gradually enters the shield. When the screw machine is close to the soil bin, the position of the screw machine is fine adjusted. After the screw machine enters the soil bin, the screw machine is connected and fixed with the connection points reserved when the shield leaves the site, and the installation of the screw machine is completed.

[0015] In the method for installing the screw machine of the shield in the narrow space, the installation process of the screw machine in the underground translation and rotation is simulated by using the BIM technology, the installation path and steps of the screw machine are planned, and the installation process is ensured to be smoothly performed.

[0016] The rotating and translating vehicle can move on the track of the pushing and translating seat of the shield, so that the position of the screw machine can be adjusted in the small distance translation in the width direction of the cross passage during the rotation of the screw machine.

[0017] By pushing the front and middle shield which has entered the entrance of the starting section to the starting hole entrance by a distance, the rotation space of the screw machine at the cross passage and the starting entrance position can be reserved. During the installation of the screw machine, the screw machine is passively entered into the shield by the retreat of the shield, so that the butt joint of the screw machine and the shield can be effectively realized, and then the connection and installation of the screw machine on the shield are facilitated.

[0018] The arm section of the folding arm crane can be folded and bent, is not affected by the net width and net height of the cross passage, and can effectively realize hoisting of the screw machine and adjustment of the installation position.

[0019] The installation method of the shield screw machine in the application can well solve technical problems such as limited space, great installation difficulty, hoisting instability and mechanical collision of long-length equipment such as a space shield screw machine in a tunnel, effectively improves the construction progress of the tunnel, and reduces the construction period benefit.

[0020] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 The figure is a flowchart of the installation method of the shield screw machine in a narrow space in the present application. Figure 2 The figure is a structural diagram of the swivel jigs in the present application. Figure 3 The figure is a structural diagram of the support system in the present application. Figure 2 The figure is a structural diagram of the support system in the present application. Figure 4 The figure is a structural diagram of the shield push and translation seat in the present application. Figure 2 The figure is a structural diagram of the shield push and translation seat in the present application. Figure 5 The figure is a structural diagram of the swivel translation vehicle in the present application. Figure 2 The figure is a structural diagram of the swivel translation vehicle in the present application. Figure 6 The figure is a structural diagram of the swivel translation vehicle in the present application. Figure 7 The figure is a schematic diagram of the state of the screw machine before swiveling at the entrance of the starting section. Figure 8 The figure is a schematic diagram of the state of the screw machine before swiveling at the entrance of the starting section. Figure 9 The figure is a schematic diagram of the state of the screw machine before swiveling at the entrance of the starting section. Figure 10 The figure is a schematic diagram of the state of the screw machine before swiveling at the entrance of the starting section.

[0023] Figure legend: 1-swivel jigs; 11-support system; 111-support leg; 112-cross brace; 113-inclined brace; 12 - Shield pushing and translating seat; 13 - Swivel translating vehicle; 131 - Moving platform; 132 - Slewing bearing; 133 - Rotating platform; 2 - Screw machine. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0025] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer", etc. are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the products of the present application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated devices or elements must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0027] The shield screw machine installation method in narrow space in the present application is suitable for installation of a long-length equipment in a narrow space underground, and is particularly suitable for installation of a screw machine under narrow space conditions when a shield is laterally divided and started.

[0028] Referring to Figure 1 , and combining the structure of the swivel tooling in Figures 2-6 , and combining the schematic of the screw machine in different stages of swivel in Figures 7-10 , the shield screw machine installation method in narrow space in the present application specifically installs the shield screw machine 2 in the tunnel, and specifically includes the following steps: The installation process of the screw machine 2 is simulated by using BIM technology, the installation process of the screw machine 2 is simulated by using BIM technology, potential risk points can be identified in advance, emergency plans can be made, the installation path of the screw machine 2, the swivel angle and the translation steps are planned, and the feasibility and safety of each link are ensured.

[0029] Combined with the trial assembly of the screw machine 2 on the ground, it can be verified whether the slewing bearing 132 and the walking track of the rotating tool 1 are smooth, and the stability and reliability of the installation in the well can be ensured.

[0030] During the trial installation, the installation process of the rotating tool 1 is mainly tested on the ground. The rotating tool 1 includes a support system 11, a shield pushing and translating seat 12, and a rotating and translating vehicle 13. First, the lower support system 11 is installed. After the installation of the support system 11 is completed, the shield pushing and translating seat 12 is installed above the support system 11. The rotating and translating vehicle 13 includes a moving platform 131, a slewing bearing 132, and a rotating platform 133 arranged from bottom to top. After the installation of the shield pushing and translating seat 12 is completed, the lower moving platform 131 is installed above it. After the lower moving platform 131 is installed in place, the slewing bearing 132 is installed above it. Finally, the upper rotating platform 133 is installed above the slewing bearing 132.

[0031] The shield pushing and translating seat 12 is provided with a track, and the moving platform 131 can move along the track of the shield pushing and translating seat 12. By testing the trial installation of the rotating tool 1 on the ground, potential problems can be found, and the smoothness of the slewing bearing 132 and the moving platform 131 moving on the track can be ensured.

[0032] The support system 11 includes support legs 111, cross braces 112, and inclined braces 113. The support legs 111 are made of profile steel and steel plates. The cross braces 112 and the inclined braces 113 are made of profile steel.

[0033] The upper and lower support legs 111 are connected by bolts. The two support legs 111 on the same side are connected by the cross braces 112 and the inclined braces 113. The two support legs 111 on the opposite sides are connected by the cross braces 112. The cross braces 112, the inclined braces 113, and the support legs 111 are all connected by bolts. The connection by bolts facilitates on-site adjustment.

[0034] The shield pushing and translating seat 12 is installed above the support legs 111 and specifically includes a translating bracket. The translating bracket is connected to the support legs 111 by bolts. A guide track for the movement of the moving platform 131 is arranged on the translating bracket. The guide track allows the rotating and translating vehicle 13 to move as a whole on the translating bracket, thereby facilitating adjustment of the translation space during the installation of the screw machine 2.

[0035] The support system 11 can effectively support the rotating tooling 1, and can also be combined with the support system 11 of the front and middle shield at the inlet of the launching section. This ensures that when the rotating tooling 1 is moved to the inlet of the launching section, the front and middle shield and the spiral machine 2 are at the same height level. More specifically, it enables the translation bracket of the front and middle shield to effectively connect with the translation bracket of the shield tunneling machine jacking translation seat 12, which is beneficial for the connection between the spiral machine 2 and the shield body after the spiral machine 2 has rotated and translated.

[0036] Meanwhile, the spiral connection between the support leg 111 and the shield jacking and translation seat 12 enables the formation of reusable applications with different structures, making it more suitable for the orderly installation of the shield machine and auxiliary equipment.

[0037] The rotating translation vehicle 13 has the dual effect of moving on the shield tunneling jacking translation seat 12 and rotating the screw conveyor 2. After loading the screw conveyor 2, the screw conveyor 2 can be rotated by the rotation of the slewing bearing 132 and the rotating platform 133 relative to the moving platform 131.

[0038] Through the movement in the two dimensions mentioned above, the spiral machine 2 can rotate at the junction of the transverse channel and the starting inlet. At the same time, the spiral machine 2 can form an installation posture that is combined with the shield after rotation. The spiral machine 2 is translated in the transverse channel in a way that the length direction is parallel to the direction of movement of the transverse channel. Specifically, the rotation tool 1 and the spiral machine 2 are translated as a whole by a forklift. When the spiral machine 2 is translated as a whole to the starting section inlet, the rotation action of the spiral machine 2 is completed through the movement in the two dimensions mentioned above.

[0039] The mobile platform 131 located at the bottom of the rotating and translating vehicle 13 is made of welded steel and has wheels installed at its bottom. The wheels of the lower mobile platform 131 can move along the track of the shield tunneling jacking and translating seat 12.

[0040] The slewing bearing 132, as the core component of the rotational motion, is forged from alloy steel and features low friction and high-precision rotation. It is welded onto the lower moving platform 131. The upper rotating platform 133, made of welded steel profiles and plates, is installed above the slewing bearing 132, providing a placement surface for the screw conveyor 2.

[0041] Before hoisting the rotating tool 1, the forklift is first hoisted down into the well and placed in the cross passage, thus making room for the lowering of the rotating tool 1 into the well.

[0042] When the forklift is lowered into the shaft and hoisting the rotating tooling 1, the support system 11, the shield tunneling jacking and translation seat 12, and the rotating translation vehicle 13 are hoisted in sequence. The rotating tooling 1 is installed in the launching shaft according to the ground test assembly. According to the translation direction of the screw conveyor 2, the center line of the mobile platform 131 is placed and fixed at the center line position of the launching shaft, so that the center line of the mobile platform 131 coincides with the center line position of the launching shaft. The installation process strictly follows the ground test assembly method and process standards.

[0043] After the rotating fixture 1 is installed and confirmed to be correct, steel plates are used to weld the moving platform 131 of the rotating translation vehicle 13 to the shield tunneling jacking translation seat 12 firmly to prevent the moving platform 131 from becoming unstable relative to the shield tunneling jacking translation seat 12 when the forklift moves the rotating fixture 1 as a whole.

[0044] The installed rotating tool 1 is pulled into the cross passage by a forklift to create space for the folding boom crane to go down into the well. After the site conditions are ready, the folding boom crane is lifted down into the well and placed on one side of the starting well to reserve space for the screw conveyor 2 to go down into the well.

[0045] Once the site conditions are ready, the folding boom crane will be hoisted down into the well and placed on one side of the launching shaft to reserve space for the screw conveyor 2 to be lowered into the well.

[0046] Before lowering the spiral auger 2 into the well, the hoisting points are rationally arranged according to the center of gravity and length of the spiral auger 2, and a certain number of support frames are welded. The arrangement of the hoisting points ensures stability during the hoisting and lowering process. The support frames also provide sufficient height space for the spiral auger 2 to sit on the rotating platform 133. Furthermore, by welding the support frames to the rotating platform 133, the spiral auger 2 is supported and connected, ensuring synchronized movement with the rotating translation vehicle 13, and minimizing instability during rotation.

[0047] After welding the support frame to the bottom of the screw conveyor 2, it is hoisted to the launching shaft. During the hoisting process, since the length of the screw conveyor 2 is greater than the net dimensions of the launching shaft, the screw conveyor 2 enters the launching shaft at an appropriate tilt angle. When the screw conveyor 2 enters the height range of the cross passage, it is adjusted to a horizontal state to ensure that the screw conveyor 2 is smoothly placed in the launching shaft on the other side relative to the folding boom crane.

[0048] It should be noted that, due to the large length of the screw conveyor 2, after the screw conveyor 2 is placed in position, its axial length direction should be parallel to the translation direction of the transverse channel. This can reduce the lifting stroke of the folding arm crane and facilitate the lifting of the screw conveyor 2 in narrow spaces.

[0049] The screw conveyor 2 is hoisted onto the rotating translation vehicle 13 using a folding boom crane. Specifically, the screw conveyor 2 is hoisted onto the rotating platform 133 of the rotating translation vehicle 13 using a folding boom crane, and the support frame is welded and fixed to the rotating platform 133, so that the screw conveyor 2 and the rotating tooling 1 are combined into a whole for forklift translation.

[0050] The rotating platform 133 is equipped with tracks for placing long equipment, which can stably place the screw conveyor 2 between the two tracks without the need for a support frame, thus achieving stable placement of the screw conveyor 2 on the rotating platform 133.

[0051] The rotating fixture 1 and the screw conveyor 2 are moved together by a forklift to the inlet of the starting section. During the moving operation, the forklift must move at a constant speed to avoid swaying, deviation or other situations that may affect the safety of the operation due to uneven speed.

[0052] After the forklift moves into position, the front end of the screw conveyor 2 is aligned with the edge of the starting section inlet away from the starting shaft. This arrangement, combined with the fact that the axis of the screw conveyor 2 coincides with the axis of the transverse channel, provides sufficient space for the rotation of the screw conveyor 2 and reduces collisions between the screw conveyor 2 and the transverse channel or the starting inlet tunnel during the rotation process.

[0053] After being moved into position, the folding boom crane enters a suitable location in the cross passage to await subsequent attitude adjustments for assisted lifting. Having completed all forklift translation operations, in order to enable movement and rotation during the rotation process, the welding and fixing relationship between the rotating translation vehicle 13's moving platform 131 and the shield tunneling machine's jacking translation seat 12 is released.

[0054] Since the clear width of the transverse passage is less than the length of the spiral machine 2, the spiral machine 2 cannot rotate directly in the transverse passage. Therefore, the rotation of the spiral machine 2 requires a portion of the starting section space. The front and middle shields that have entered the starting section entrance need to be pushed a certain distance towards the starting tunnel before the spiral machine 2 rotates.

[0055] In the upstream process of the installation of the shield auger 2, including the installation of the shield body of the front and middle shields in the entrance tunnel of the starting section, the shield body is also moved and lifted by the translation bracket under the premise of bearing the load. After being translated and lifted from the cross passage to the entrance of the starting section, it stays at the entrance of the starting section.

[0056] In order to provide rotation space for the installation of the spiral machine 2, the shield of the front and middle shields is pushed forward using rail clamping jacks. The distance that the front and middle shields are pushed towards the starting tunnel is at least greater than the length of the spiral machine 2 minus the width of the transverse passage. In other words, the distance that the front and middle shields are pushed towards the starting tunnel should be sufficient to meet the space requirements of the spiral machine 2 in the length direction after the attitude is adjusted, while also taking into account a certain amount of installation space to meet the rotation and installation of the spiral machine 2 in the entrance tunnel of the starting section.

[0057] During the rotation installation process of the screw conveyor 2, multiple rotation and translation operations are included. The rotation of the screw conveyor 2 is specifically achieved by the slewing bearing 132. The slewing bearing 132 includes an outer ring and an inner ring that rotate relatively freely. The outer ring is located at the bottom and is fixedly connected to the moving platform 131, while the inner ring is located at the top and is fixedly connected to the rotating platform 133. Precise raceway grooves are machined on the inner and outer rings, and the inner ring is rotated by steel balls, cylindrical or conical rollers set in the raceway grooves, so as to enable the rotation of the rotating platform 133 and the inner ring relative to the outer ring and the moving platform 131.

[0058] The rotation of the rotating platform 133 is specifically achieved by a folding boom crane in conjunction with a rotating fixture, through the dragging rotation of the folding boom crane. Under the premise that the screw conveyor 2, the support frame and the rotating platform 133 are welded together, they form a synchronously rotating whole. When the folding boom crane performs corresponding traction movement through the lifting point on the screw conveyor 2, it can provide the driving force for dragging rotation, thereby enabling the synchronously rotating whole to rotate effectively, and thus realize the rotation of the screw conveyor 2.

[0059] After the screw conveyor 2 rotates to its maximum angle, the rotating and translating vehicle 13 moves towards the starting section. Specifically, during the rotation process, the rotation angle at which the side end of the screw conveyor 2 away from the entrance of the starting section is about to contact the side wall of the transverse passage is the maximum rotation angle of the screw conveyor 2 in a single rotation. At this time, the screw conveyor 2 needs to be translated. During the translation process, the moving platform 131 moves towards the entrance of the starting section on the shield tunneling jacking translation seat 12, driving the slewing bearing 132, the rotating platform 133, and the screw conveyor 2 to move closer to the entrance of the starting section, so that the side end of the screw conveyor 2 moves away from the side wall of the transverse passage, and at the same time the screw conveyor 2 moves closer to the entrance of the starting section, reserving rotation space for the next rotation, thus completing a single rotation and translation.

[0060] Continue rotating and translating the screw conveyor 2 in this way until the rotating and translating carriage 13 in the rotating fixture 1 moves to the edge of the shield tunneling jacking and translating seat 12, so that the rotating platform 133 rotates the screw conveyor 2 to the maximum extent. After multiple rotations and translations, when the rotating and translating carriage 13 in the rotating fixture 1 moves to the edge of the shield tunneling jacking and translating seat 12, it means that there is no additional translation space. At this time, the rotation and translation operation of the screw conveyor 2 is completed.

[0061] After rotating the screw conveyor 2 to its maximum extent, remove the support frame, smooth the removed surfaces of the screw conveyor 2 and the support frame, and use a folding arm crane to lift the screw conveyor 2 and straighten it. During the alignment process, based on the weight of the spiral auger 2, an appropriate electric hoist is added to the hook of the folding boom crane to adjust the attitude of the spiral auger 2. Using the folding boom crane and the electric hoist to suspend the spiral auger 2 at different lifting points, the spiral auger 2 is lifted and moved towards the shield body until it is close to the shield. By adjusting the lifting height of the folding boom crane and the electric hoist hook, the attitude of the spiral auger 2 is precisely adjusted.

[0062] After the attitude adjustment of the spiral machine 2 is completed, the rail clamping jacks clamp the rails on the front and middle shield translation brackets, and push against the shield body in the opposite direction, causing the front and middle shield to retreat away from the entrance of the launching section. As the shield body retreats, the spiral machine 2 passively and gradually enters the shield body.

[0063] After the spiral machine 2 passively enters the shield body, when the spiral machine 2 approaches the soil chamber, the position of the spiral machine 2 is finely adjusted to ensure that the spiral machine 2 can enter the soil chamber.

[0064] After the spiral machine 2 enters the soil chamber, the connection points reserved when the shield body leaves the site are matched one by one and fixed with bolts. This completes the installation of the spiral machine 2 on the shield body of the front and middle shields.

[0065] During installation, it is necessary to ensure that the screw conveyor 2 and the rotating fixture 1 are tightly connected to form a complete structural system. The smooth operation of the slewing bearing 132 must be guaranteed, and its normal operation during installation must be ensured. The slewing bearing 132 must have sufficient load-bearing capacity to withstand overturning moments and prevent overturning.

[0066] During the rotation of the spiral machine 2, the rotation angle needs to be strictly controlled to avoid the spiral machine 2 colliding with the side wall of the transverse passage.

[0067] Meanwhile, during the shield's retraction process, the posture of the spiral machine 2 must be strictly maintained to prevent the shield from scraping against the spiral machine 2 during the retraction process.

[0068] During the installation of the spiral machine 2, the installation space is very limited because the length of the spiral machine 2 is greater than the net width of the transverse passage. The shield spiral machine installation method in narrow space of the present invention can realize the rotation and small-range translation of the spiral machine 2 within the transverse passage. When the spiral machine 2 is translated to the inlet of the launching section, the front and middle shield bodies are translated forward to provide sufficient space for the rotation of the spiral machine 2.

[0069] Utilizing the foldable and bendable boom sections of the folding boom crane, the limitations of the cross passage's clear width and height are avoided. The rotating fixture 1 works in conjunction with the folding boom crane to complete the rotation operation of the screw conveyor 2. After rotation, the attitude of the screw conveyor 2 is adjusted using an electric hoist in conjunction with the folding boom crane. As the shield body retracts, the screw conveyor 2 gradually enters the shield body. Once the screw conveyor 2 is fully inside the soil chamber, it is connected and secured to the shield body, completing the installation of the screw conveyor 2.

[0070] By using BIM technology to simulate the translation and rotation of the spiral machine 2, and planning the installation path and steps, it is possible to effectively avoid situations where errors in construction steps and rework are required due to unreasonable path planning during actual installation. This saves manpower and material costs, significantly reduces construction delays, speeds up the overall installation progress, and improves project efficiency.

[0071] Compared to large lifting equipment, folding boom cranes have lower rental and operating costs and can operate flexibly in confined spaces. In processes such as installing the screw conveyor 2 into the rotating tooling 1 and adjusting its posture after rotation, the folding boom crane can quickly and accurately complete the lifting tasks, reducing the time spent in each construction stage, creating favorable conditions for the project's construction, and significantly improving the project's schedule efficiency.

[0072] In one specific application example, the XX section of the civil construction project for a subway tunnel in a certain city adopted the shield tunneling method, with a lateral split launch. The net dimensions of the launch shaft were 13.9*14 m; the net width of the cross passage was 9.6 m, and the net height was 15.5 m; the length of the screw conveyor 2 was 16 m. After entering the launch shaft, the screw conveyor 2 was moved horizontally through the cross passage to the entrance of the launch section for rotation and installation. The installation space was extremely limited, significantly increasing the construction difficulty.

[0073] By utilizing BIM technology to simulate the installation process, the path and steps were planned, risks were identified, and contingency plans were developed. After testing and assembling the rotating fixture 1 on the ground, it was hoisted to the well for installation and fixation. Before lowering the screw conveyor 2 into the well, the hoisting points were strategically positioned, and the support frame was welded. Since the screw conveyor 2's length exceeded the net dimensions of the launching shaft, it entered the launching shaft at an appropriate tilt angle. When the screw conveyor 2 entered the horizontal passage height range, it was adjusted to a horizontal position. After being lowered into the well, the screw conveyor 2 was moved horizontally to the launching section entrance using a forklift, and a rail-clamped jack was used to push the shield forward, reserving space for the screw conveyor 2 to rotate. After rotating the screw conveyor 2 to its maximum angle using the rotating fixture 1, the support frame was removed, and a folding boom crane was used to straighten the screw conveyor 2. Finally, an electric hoist was added to the hook of the folding boom crane to adjust the screw conveyor 2's posture, and the rail-clamped jack was used to push the shield in the opposite direction, allowing the screw conveyor 2 to enter the shield and be connected and fixed. This project successfully completed the installation of the screw conveyor 2, achieving good economic and social benefits and providing a reference for similar projects.

[0074] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0075] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for installing a shield tunneling auger in a confined space, characterized in that, Includes the following steps: The installation process of the auger machine was simulated, and the rotating tooling of the auger machine was trial-assembled on the ground. The rotating fixture includes a support system, a shield tunneling machine jacking and translation base, and a rotating and translation vehicle. The rotating and translation vehicle includes a moving platform, a slewing bearing, and a rotating platform. The moving platform can move along the track of the shield tunneling machine jacking and translation base. The forklift was lifted down into the well and parked in the transverse passage. The main assembly was lifted down into the well and placed at the center line of the starting well. Use a forklift to pull the rotating tooling into the transverse passage, and then lift the folding boom to the launching shaft; After welding the support frame at the bottom of the screw conveyor, it is hoisted to the launching shaft. The screw conveyor is then hoisted onto the rotating and translating vehicle using a folding boom crane. A forklift is then used to move the rotating fixture and the screw conveyor as a whole to the inlet of the launching section, so that the front end of the screw conveyor is flush with the edge of the launching section inlet on the side away from the launching shaft. The front and middle shields, which have been pre-entered into the inlet of the launching section, are pushed a certain distance towards the launching tunnel entrance. Then, the auger is rotated. When the auger rotates to its maximum angle, the rotating translation vehicle is moved towards the launching section to bring the auger closer to the launching section entrance. The auger is rotated and translated in this way until the rotating translation vehicle in the rotating tooling moves to the edge of the shield jacking translation seat, so that the rotating platform can rotate the auger to the maximum extent. Remove the support frame, use a folding boom crane and electric hoist to straighten and adjust the attitude of the spiral machine, and use jacks to move the front and middle shields away from the starting section inlet, so that the spiral machine is passively inserted into the shield body for connection, thus completing the installation of the spiral machine on the shield body.

2. The installation method according to claim 1, characterized in that, The installation process of the screw conveyor is simulated using BIM technology, the installation path, rotation angle and translation steps of the screw conveyor are planned, and the screw conveyor rotation tooling is trial assembled. Trial assembly includes installing the support system, then installing the shield tunneling machine jacking and translation seat on top of the support system, and then installing the rotating and translation vehicle on the shield tunneling machine jacking and translation seat; The installation of the rotating and translating vehicle includes: installing a moving platform on the shield tunneling machine's jacking and translating base, installing a slewing bearing on the moving platform, and finally installing a rotating platform above the slewing bearing.

3. The installation method according to claim 2, characterized in that, The support system includes support legs, horizontal braces, and diagonal braces. The upper and lower support legs are connected by bolts. The two support legs on the same side are connected by horizontal braces and diagonal braces. The support legs on both sides are connected by horizontal braces. The horizontal braces, diagonal braces, and support legs are all connected by bolts. The shield tunneling jacking and translating base includes a translating bracket, which is connected to the support legs by bolts. A guide rail for moving the mobile platform is provided on the translating bracket.

4. The installation method according to claim 3, characterized in that, The bottom of the mobile platform is provided with traveling wheels that can move along the guide rail. The slewing bearing is welded to the mobile platform, and the rotating platform is mounted on the slewing bearing to provide a placement plane for the screw conveyor.

5. The installation method according to claim 2, characterized in that, When hoisting the rotating tooling, the support system, the shield jacking and translation seat, and the rotating translation vehicle are hoisted in sequence. The rotating tooling is then assembled and installed according to the ground test, and the center line of the moving platform is aligned with the center line of the launching shaft. Then, steel plates are used to weld the moving platform of the rotating translation vehicle to the shield jacking and translation seat. The installed rotating tooling is then pulled into the cross passage by a forklift.

6. The installation method according to claim 1, characterized in that, When lifting with a folding boom crane, the crane is first lifted down into the shaft and placed on one side of the launching shaft to reserve space for the screw conveyor to be lowered into the shaft. Then, the screw conveyor with the bottom support frame welded is lifted into the launching shaft, and multiple lifting points of the screw conveyor are arranged according to the center of gravity and length of the screw conveyor. The screw conveyor is lowered into the well in an inclined state for hoisting. When the screw conveyor reaches the height range of the horizontal channel, it is adjusted to a horizontal state so that it can be smoothly lowered into the well on the other side of the folding arm crane in the launching shaft.

7. The installation method according to claim 1, characterized in that, The screw conveyor is hoisted onto the rotating platform of the rotating translation vehicle using a folding boom crane, and the support frame is welded and fixed to the rotating platform. After the rotating tooling and the spiral machine are moved as a whole to the inlet of the starting section, the welding and fixing of the rotating translation vehicle's moving platform and the shield tunneling machine's jacking translation seat are released.

8. The installation method according to claim 7, characterized in that, The distance that the front and middle shields push towards the starting tunnel is greater than the length of the spiral machine minus the width of the transverse passage, thus reserving space for the spiral machine to rotate.

9. The installation method according to claim 1, characterized in that, During the rotation process, the rotation angle at which the side end of the screw conveyor away from the inlet of the starting section contacts the side wall of the transverse passage is the maximum rotation angle of the screw conveyor. By moving the mobile platform on the shield tunneling jacking and translation seat towards the inlet of the starting section, the slewing bearing, the rotating platform, and the screw conveyor move closer to the inlet of the starting section, so that the side end of the screw conveyor moves away from the side wall of the transverse passage, reserving rotation space for the next rotation, until the mobile platform moves to the edge of the shield tunneling jacking and translation seat.

10. The installation method according to claim 1, characterized in that, After rotating the spiral machine, the support frame is removed. The spiral machine is then straightened using a folding boom crane. An electric hoist is set on the hook of the folding boom crane to adjust the spiral machine's posture. The spiral machine is lifted and moved towards the shield body by different lifting points of the folding boom crane and the electric hoist until the spiral machine is close to the shield body. After the spiral machine attitude adjustment is completed, the front and middle shields are pushed in the opposite direction with the help of the rail clamping jacks, so that the shield body gradually moves backward. As the shield body moves backward, the spiral machine gradually enters the shield body. When the spiral machine approaches the soil chamber, the position of the spiral machine is finely adjusted. After the spiral auger enters the soil chamber, the connection points reserved when the shield body leaves the site are matched one by one and fixed with bolts. The installation of the spiral auger is then completed.

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