Complex limited space large-diameter shield split translation system and construction method

Abstract

The invention relates to a miscellaneous and confined space large-diameter shield split translation system which comprises a steel plate sliding system laid at the bottom of a construction well. The split type steel sleeve device is arranged above the steel plate sliding system and comprises a steel sleeve upper half part, a steel sleeve lower half part and a height adjusting and rotation limiting device connected between the steel sleeve upper half part and the steel sleeve lower half part; the adjustable bearing support is arranged between the steel base below the lower half part of the steel sleeve and the steel plate sliding system; and the pushing device acts on the steel base and the steel sleeve and drives the split type steel sleeve device and the steel base to translate on the steel plate sliding system. The steel sleeve has the beneficial effects that the problem that a traditional steel sleeve is too high in overall height and cannot pass through a low-clear-height limited space is effectively solved, the existing structure does not need to be disassembled and modified, and the construction risk is reduced.

Description

Technical Field

[0001] This invention belongs to the field of shield tunneling technology, and particularly relates to a split translation system and construction method for large-diameter shields in complex confined spaces. Background Technology

[0002] During the segmented construction of a tunnel boring machine (TBM), the steel sleeve and its steel base typically need to be moved, steered, and positioned within the station or shaft. Existing segmented translation methods often employ laying steel plates at the bottom of the shaft as a sliding channel, and installing a steel base, leveling pads, and supporting components below the steel sleeve. Hydraulic jacks are then used to push and move the steel sleeve. In this type of construction, the steel sleeve, steel base, and their lower supporting and leveling structures are usually arranged in a stacked configuration, resulting in a relatively large overall structural height.

[0003] In practical engineering, the split-section translation construction of tunnel boring machines (TBMs) is often limited by the height of the station structure, the size of the shaft opening, or the clearance conditions of the construction passage. When the available clearance height of the translation passage is insufficient, traditional split-section translation structures, due to their excessive overall height, are difficult to meet construction requirements, often necessitating partial demolition or temporary modification of the existing structure. This not only increases construction difficulty but also poses high safety risks. Furthermore, existing technologies typically employ thick support and leveling structures below the steel sleeve to meet load-bearing and leveling requirements, ensuring that the height of the steel sleeve in the translation state is essentially the same as its final installation state. This lacks effective means to control the height difference between the construction phase and the permanent state.

[0004] In addition, in traditional split-body translation construction, the steel base and the bottom sliding structure are mostly supported by rigid support. When the base plate is uneven or the posture changes during the translation process, problems such as local stress concentration, uneven friction resistance and asynchronous jacking are likely to occur, which further increases the difficulty of construction under limited clearance conditions.

[0005] Therefore, the existing shield tunneling machine split translation construction technology has obvious shortcomings under the conditions of insufficient clearance in the translation channel and limited overall height. There is an urgent need for a construction technology solution that can effectively reduce the overall height of the steel sleeve split translation while ensuring load-bearing capacity and construction safety, and also take into account translation stability and attitude adjustment capability. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a split translation system and construction method for large-diameter shield tunnels in complex and confined spaces.

[0007] Firstly, a system for the split-type translation of large-diameter shield tunnels in complex confined spaces is provided, including: A steel plate sliding system is laid at the bottom of the construction well to provide a lateral base. A split-type steel sleeve device is installed above the steel plate sliding system, including an upper half of the steel sleeve and a lower half of the steel sleeve, as well as a height adjustment and rotation limiting device connected between the two; the height adjustment and rotation limiting device is used to adjust the height of the upper half of the steel sleeve during the translation construction stage to adapt to the clearance requirements of the confined space. An adjustable bearing support is provided between the steel base below the lower half of the steel sleeve and the steel plate sliding system. It is used to bear vertical loads and allow the steel base to rotate to adapt to changes in posture. The jacking device acts on the steel base and the steel sleeve, driving the split steel sleeve device and the steel base to translate on the steel plate sliding system.

[0008] Preferably, the steel plate sliding system is composed of multiple steel plates spliced ​​together, and adjacent steel plates are connected by a detachable connection structure.

[0009] Preferably, the surface of the steel plate is provided with a short side groove, a pin hole, a long side tenon, a short side tenon, and a long side groove; adjacent steel plates are fitted together by a tenon-and-mortise structure and connected by inserting a pin into the pin hole; a bottom steel plate is laid on the top of the steel base, and the lower half of the steel sleeve is placed on the bottom steel plate to form a translational contact interface.

[0010] Preferably, the height adjustment and rotation limiting device includes a vertically arranged height adjustment sleeve and a limiting component; the height adjustment sleeve is provided with multiple limiting holes along the axial direction, and the effective length of the sleeve is adjusted by the limiting component to realize the height adjustment of the upper half of the steel sleeve relative to the lower half of the steel sleeve.

[0011] Preferably, the adjustable bearing support includes a rotating guide rail, a threaded screw, a height adjustment component, an upper bearing plate, a lower bearing plate, and a spherical bearing component disposed between the upper and lower bearing plates; the lower surface of the upper bearing plate is an upper sliding friction surface, and the upper surface of the lower bearing plate is a lower sliding friction surface, which are in contact through a spherical crown liner; by adjusting the threaded screw, the upper bearing plate can be controlled to rotate or lock along the rotating guide rail to achieve correction or fixation.

[0012] Preferably, the split-type steel sleeve device further includes a spot-welded fixed steel pipe, which is used to fix the upper half of the steel sleeve to the lower half of the steel sleeve after the steel sleeve is adjusted into place.

[0013] Secondly, a construction method for a large-diameter shield tunneling split translation system in complex confined spaces, as described in any of the first aspects, is provided, including the following steps: Step 1, Sliding System Installation: Clean the base surface at the bottom of the construction well, splice multiple steel plates using mortise and tenon joints and pins, install the steel plate sliding system, and anchor it at the starting and ending ends; Step 2, Substructure Assembly: Install adjustable bearing supports and steel bases on the steel plate sliding system, and install the lower half of the steel sleeve on the steel base; Step 3, Lowering and Assembling: Install the upper half of the steel sleeve using the height adjustment and rotation limit device. Adjust the length of the sleeve by adjusting the height using the limit device, so that the upper half of the steel sleeve is in a low-position split state. Fix the upper and lower halves with spot-welded steel pipes to ensure that the overall height is less than the clearance height of the translation channel. Step 4, Split-body translation construction: Start the jacking device to push the steel sleeve and steel base to move along the steel plate sliding system; Step 5, Attitude Monitoring and Correction: If deflection occurs during translation, adjust the threaded screw of the adjustable bearing support, and use the spherical bearing component to rotate the upper seat plate to adjust the attitude of the steel sleeve and correct the translation trajectory. Step 6, Positioning and Restoration: After moving to the designed position, adjust the height adjusting sleeve to raise the upper half of the steel sleeve to the designed elevation, weld the upper half and lower half of the steel sleeve and lock the adjustable bearing support to complete the construction.

[0014] Preferably, in step 4, the translation method includes linear translation and / or directional translation.

[0015] Preferably, in step 5, after the adjustable bearing support is used to correct the deviation, the threaded rod is tightened to fix the turning angle of the steel sleeve and the support, and the translation construction continues.

[0016] The beneficial effects of this invention are: 1. This invention innovatively achieves low-profile arrangement of the steel sleeve in the "construction translation state" and standard height restoration in the "final installation state" through the combination of a split-type steel sleeve device and a height adjustment and rotation limit device. It effectively solves the problem that traditional steel sleeves are too tall to pass through low-clearance confined spaces (such as stations and shafts), eliminating the need for dismantling or modifying existing structures and reducing construction risks.

[0017] 2. This invention introduces an adjustable bearing support, which utilizes a spherical bearing component and a threaded screw adjustment mechanism. This not only adapts to the unevenness of the translation base and releases additional internal forces, but also actively corrects deviations when yaw occurs during translation, significantly improving the control accuracy and stability of the translation process.

[0018] 3. This invention adopts a modular steel plate sliding system, which uses tenons and pins to achieve rapid splicing, replacing the traditional concrete pouring or scattered steel plate laying. It provides a standardized sliding interface, which is convenient and efficient to construct. In addition, the steel plate system can be disassembled and reused, reducing construction costs. Attached Figure Description

[0019] Figure 1A structural diagram of a steel plate sliding system with the convex side of the steel plate facing upwards. Figure 2 This is a structural diagram of a steel plate sliding system with the convex side of the steel plate facing downwards. Figure 3 A longitudinal cross-sectional view of the groove orientation of the steel plate in the steel plate sliding system; Figure 4 A longitudinal cross-sectional view of the steel plate tenon of the steel plate sliding system; Figure 5 for Figure 3 and Figure 4 Arrangement diagram of the mortise and tenon structure assembly end face after assembly; Figure 6 This is a diagram showing the arrangement of two steel plates when they shift. Figure 7 This is a longitudinal layout diagram of the steel plates after the short side is assembled. Figure 8 This is a top view of the steel plates after the short side has been assembled. Figure 9 This is a layout diagram of the rotation limit system when it is not rotating; Figure 10 This is a diagram showing the layout of the rotation limit system after rotation. Figure 11 This is a longitudinal section view of the adjustable support structure; Figure 12 This is a cross-sectional view of the bottom of the adjustable support structure; Figure 13 This is a top view of the adjustable support structure when it is not rotating; Figure 14 This is a top view of the adjustable support structure after rotation; Figure 15 A schematic diagram of the overall structure of the shield tunneling split translation system. Explanation of reference numerals in the attached drawings: 1-Short side groove; 2-Pin hole; 3-Long side tenon; 4-Short side tenon; 5-Long side groove; 6-Pin; 7-Upper half of steel sleeve; 8-Lower half of steel sleeve; 9-Height adjusting sleeve; 10-Spot-welded fixed steel pipe; 11-Upper seat plate; 12-Upper sliding friction surface; 13-Lower sliding friction surface; 14-Lower seat plate; 15-Spherical crown liner; 16-Rotating guide rail; 17-Threaded screw; 18-Height adjusting assembly. Detailed Implementation

[0020] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0021] Example 1: To address the problems of existing technologies, Embodiment 1 of this application provides a split-type translation system for large-diameter shield tunnels in complex confined spaces, such as... Figures 1 to 15 As shown, it includes: a steel plate sliding system, a split steel sleeve device, an adjustable bearing support, and a jacking device; The steel plate sliding system is laid at the bottom of the construction well to provide a translation base surface.

[0022] Specifically, such as Figures 1-8 As shown, the steel plate sliding system is composed of multiple specially made steel plates spliced ​​together, providing a continuous and flat load-bearing base for translation.

[0023] The unit structure of the steel plate sliding system is as follows Figure 1 , Figure 2 As shown, each steel plate has a specific concave-convex structure on its surface, including a short-side groove 1 and a short-side tenon 4 along the short side, and a long-side tenon 3 and a long-side groove 5 along the long side. Pin holes 2 are provided at the connecting ends of the steel plates.

[0024] The splicing method of the steel plate sliding system is as follows: Figures 3 to 5 As shown, adjacent steel plates are positioned by the interlocking of the short-side groove 1 and the short-side tenon 4, and the long-side groove 5 and the long-side tenon 3. Figure 7 and Figure 8 As shown, after the splicing is completed, the pin 6 is inserted into the aligned pin hole 2 to achieve a rigid connection between adjacent steel plates.

[0025] This mortise and tenon joint and pin connection structure not only ensures the flatness of the sliding surface, but also effectively resists the shearing force generated during translation, such as... Figure 6 As shown, even if local displacement occurs, the integrity of the overall structure can be maintained.

[0026] A split-type steel sleeve device is installed above the steel plate sliding system, including an upper part 7 and a lower part 8 of the steel sleeve, and a height adjustment and rotation limiting device connected between the two; the height adjustment and rotation limiting device is used to adjust the height of the upper part 7 of the steel sleeve during the translation construction stage to adapt to the clearance requirements of the confined space.

[0027] An adjustable bearing support is provided between the steel base below the lower half 8 of the steel sleeve and the steel plate sliding system. It is used to bear vertical loads and allow the steel base to rotate to adapt to changes in posture.

[0028] The jacking device acts on the steel base and the steel sleeve, driving the split steel sleeve device and the steel base to translate on the steel plate sliding system.

[0029] Example 2: Based on Example 1, Example 2 of this application provides a more specific complex confined space large-diameter shield tunneling split translation system, including: A steel plate sliding system is laid at the bottom of the construction well to provide a sliding base.

[0030] Split-type steel sleeve device (such as) Figure 9 and Figure 10 As shown in the figure, it is installed above the steel plate sliding system and includes an upper half 7 and a lower half 8 of the steel sleeve, as well as a height adjustment and rotation limit device connected between the two; the height adjustment and rotation limit device is used to adjust the height of the upper half 7 of the steel sleeve during the translation construction stage to adapt to the clearance requirements of the confined space.

[0031] The split-type steel sleeve device is designed to solve the problem of insufficient clearance in confined spaces.

[0032] The split-type steel sleeve device adopts a split structure, with the steel sleeve horizontally divided into an upper part 7 and a lower part 8. Furthermore, the split-type steel sleeve device allows for height adjustment and rotation limit control: such as... Figure 9 As shown, a height adjustment sleeve 9 is provided between the upper and lower halves. This sleeve has multiple limiting holes along the axial direction, and its effective support length can be adjusted by limiting components.

[0033] The low-profile mode of the split-type steel sleeve device is as follows: During the translation construction phase, the height of the sleeve 9 is adjusted to a shorter length, so that the upper half 7 of the steel sleeve is in a low "collapsed" state relative to the lower half 8 (e.g., Figure 10 (As shown in the rotating or lowering state), after rotating to a suitable height, the limiting component fixes the height adjusting sleeve 9 and spot welds the steel pipe 10 to fix it, thereby significantly reducing the overall height of the steel sleeve so that it can pass smoothly through the low headroom passage.

[0034] Adjustable bearing support (such as) Figures 11-14 As shown in the figure, the steel base located below the lower half 8 of the steel sleeve and the steel plate sliding system are used to bear vertical loads and allow the steel base to rotate to adapt to attitude changes.

[0035] Adjustable load-bearing supports are used to bear weight and provide attitude adjustment functions. Their core structure is as follows: Figure 11 As shown, the support includes an upper bearing plate 11, a lower bearing plate 14, and a spherical crown liner 15 located between the two. The upper sliding friction surface 12 on the lower surface of the upper bearing plate 11 and the lower sliding friction surface 13 on the upper surface of the lower bearing plate 14 are in contact through the spherical crown liner 15 to form a spherical friction pair.

[0036] Adjustable bearing support adjustment mechanism such as Figure 13 and Figure 14As shown, the support is equipped with rotating guide rails 16 and threaded screws 17 around its perimeter, and the upper base plate 11 is connected to the steel base via a height adjustment assembly 18. This structure allows the upper base plate 11 to rotate relative to the lower base plate 14 (e.g., ...). Figure 14 (as shown), to adapt to or correct attitude deviations during translation.

[0037] The jacking device acts on the steel base and the steel sleeve, driving the split steel sleeve device and the steel base to translate on the steel plate sliding system.

[0038] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 1 can be referred to each other, and will not be repeated in this application.

[0039] Example 3: Based on Example 2, Example 3 of this application provides a construction method for a large-diameter shield tunneling split translation system in complex confined spaces, including the following steps: Step 1, Sliding System Installation: Clean the base surface at the bottom of the construction well, and install the steel plate sliding system by splicing multiple steel plates together using mortise and tenon structures and pins, and anchor them at the starting and ending ends.

[0040] Specifically, using Figures 3 to 5 The mortise and tenon structure shown is assembled to ensure a tight fit between the short side groove 1 and the short side tenon 4, and between the long side groove 5 and the long side tenon 3. Then, as... Figure 7 , Figure 8 As shown, the pin 6 is driven into the pin hole 2 to lock the steel plate, and anchored at the start and end ends to form a stable steel plate sliding system.

[0041] Step 2, Substructure Assembly: Install adjustable bearing supports and steel bases on the steel plate sliding system, and install the lower half of the steel sleeve 8 on the steel base.

[0042] Specifically, adjustable bearing supports are installed at fixed points on the steel plate sliding system. Figure 11 Adjust the height adjustment component 18 to make the upper base plate 11 horizontal. Then install the steel base and the lower half of the steel sleeve 8, so that it sits on the bottom steel plate on top of the steel base to form a stable translational contact interface.

[0043] Step 3, Lowering and Assembling: Install the upper half 7 of the steel sleeve using the height adjustment and rotation limit device. Adjust the length of the height adjustment sleeve 9 by using the limit component to make the upper half 7 of the steel sleeve in a low-position split state. Fix the upper and lower halves with spot-welded steel pipes 10 to ensure that the overall height is less than the clearance height of the translation channel.

[0044] Specifically, the height adjustment sleeve 9 connects the lower half 8 and the upper half 7 of the steel sleeve. Before translation, the positioning limit piece is pulled out, shortening the effective length of the sleeve 9, so that the upper half 7 of the steel sleeve descends in a controlled manner or rotates around the axis to... Figure 10 The "low-profile" position is shown. At this point, the overall height of the steel sleeve is less than the clearance height of the translation channel, meeting the passage requirements.

[0045] Step 4, Split-body translation construction: Start the jacking device to push the steel sleeve and steel base to move along the steel plate sliding system.

[0046] Specifically, the jacking device (hydraulic jack) is activated to push the steel sleeve forward along the steel plate sliding system and make adaptive adjustments: during the translation process, if the base is uneven, the spherical crown liner 15 in the adjustable bearing support allows the steel base to rotate slightly, releasing additional internal forces and avoiding structural damage.

[0047] Translation methods include linear translation, directional translation, or combinations thereof.

[0048] Step 5, Attitude Monitoring and Correction: If deflection occurs during translation, adjust the threaded screw 17 of the adjustable bearing support, and use the spherical bearing component to rotate the upper seat plate 11 to adjust the attitude of the steel sleeve and correct the translation trajectory.

[0049] Specifically, such as Figure 13 and Figure 14 As shown, if the monitoring detects that the steel sleeve deviates from the predetermined track (deflection occurs), the jacking should be stopped immediately. Loosen one side of the threaded screw 17, and using the spherical bearing structure characteristics, drive the upper seat plate 11 to rotate along the rotating guide rail 16, thereby adjusting the axis orientation of the steel sleeve. After the correction is completed, tighten the threaded screw 17 again to lock the posture, and continue the translation.

[0050] Step 6, Positioning and Restoration: After moving to the designed position, adjust the height adjusting sleeve 9 to raise the upper half 7 of the steel sleeve to the designed elevation, weld the upper half 7 and the lower half 8 of the steel sleeve and lock the adjustable bearing support to complete the construction.

[0051] Specifically, after the steel sleeve is moved to the designed position, the height adjustment sleeve 9 is operated, and the upper part 7 of the steel sleeve is lifted to the designed elevation (restored to the design elevation) using jacks and other auxiliary equipment. Figure 9 (As shown in the diagram). Insert the limiting component to lock the height, and weld and install the spot-welded fixed steel pipe 10 to connect the upper and lower halves into a whole. Finally, permanently lock or grout the adjustable bearing support to complete the construction.

[0052] It should be noted that the method provided in this embodiment is the corresponding method of the system provided in embodiment 2. Therefore, the parts that are the same as or similar to those in embodiment 2 in this embodiment can be referred to each other, and will not be repeated in this application.

Claims

1. A split-type translation system for large-diameter shield tunnels in complex confined spaces, characterized in that: include: A steel plate sliding system is laid at the bottom of the construction well to provide a lateral base. The split steel sleeve device is set above the steel plate sliding system, including the upper half (7) of the steel sleeve and the lower half (8) of the steel sleeve, as well as the height adjustment and rotation limit device connected between the two; the height adjustment and rotation limit device is used to adjust the height of the upper half (7) of the steel sleeve during the translation construction stage to adapt to the clearance requirements of the confined space. An adjustable bearing support is provided between the steel base below the lower half (8) of the steel sleeve and the steel plate sliding system. It is used to bear vertical loads and allow the steel base to rotate to adapt to attitude changes. The jacking device acts on the steel base and the steel sleeve, driving the split steel sleeve device and the steel base to translate on the steel plate sliding system.

2. The complex confined space large-diameter shield tunneling split translation system according to claim 1, characterized in that, The steel plate sliding system is composed of multiple steel plates spliced ​​together, and adjacent steel plates are connected by a detachable connection structure.

3. The complex confined space large-diameter shield tunneling split translation system according to claim 2, characterized in that, The surface of the steel plate is provided with a short side groove (1), a pin hole (2), a long side tenon (3), a short side tenon (4), and a long side groove (5); adjacent steel plates are connected by a tenon and mortise structure and by inserting a pin (6) into the pin hole (2); the top of the steel base is covered with a bottom steel plate, and the lower half (8) of the steel sleeve is placed on the bottom steel plate to form a translational contact interface.

4. The complex confined space large-diameter shield tunneling split translation system according to claim 3, characterized in that, The height adjustment and rotation limiting device includes a vertically arranged height adjustment sleeve (9) and a limiting component; the height adjustment sleeve (9) is provided with multiple limiting holes along the axial direction, and the effective length of the sleeve is adjusted by the pin to realize the height adjustment of the upper half (7) of the steel sleeve relative to the lower half (8) of the steel sleeve.

5. The complex confined space large-diameter shield tunneling split translation system according to claim 4, characterized in that, The adjustable bearing support includes a rotating guide rail (16), a threaded screw (17), a height adjustment component (18), an upper seat plate (11), a lower seat plate (14), and a spherical bearing component disposed between the upper seat plate (11) and the lower seat plate (14); the lower surface of the upper seat plate (11) is an upper sliding friction surface (12), and the upper surface of the lower seat plate (14) is a lower sliding friction surface (13), and the two are in contact through a spherical crown liner (15); by adjusting the threaded screw (17), the upper seat plate (11) can be controlled to rotate or lock along the rotating guide rail (16) to achieve correction or fixation.

6. The complex confined space large-diameter shield tunneling split translation system according to claim 5, characterized in that, The split-type steel sleeve device also includes a spot-welded fixed steel pipe (10) for fixing the upper half (7) of the steel sleeve to the lower half (8) of the steel sleeve after the steel sleeve is adjusted to the position.

7. A construction method for a complex confined space large-diameter shield tunneling split translation system as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1, laying of the sliding system: clean the base surface at the bottom of the construction well, splice multiple steel plates with tenon and mortise structure and pins (6), lay the steel plate sliding system, and anchor at the starting and ending ends; Step 2, Substructure Assembly: Install adjustable bearing supports and steel bases on the steel plate sliding system, and install the lower half of the steel sleeve (8) on the steel base. Step 3, Lowering and assembling: Install the upper half of the steel sleeve (7) using the height adjustment and rotation limit device, adjust the length of the height adjustment sleeve (9) by the pin, so that the upper half of the steel sleeve (7) is in a low split state, and fix the upper and lower halves with spot welding steel pipe (10) to ensure that the overall height is less than the clearance height of the translation channel; Step 4, Split-body translation construction: Start the jacking device to push the steel sleeve and steel base to move along the steel plate sliding system; Step 5, Attitude monitoring and correction: If deflection occurs during translation, adjust the threaded screw (17) of the adjustable bearing support, and use the spherical bearing component to rotate the upper seat plate (11) to adjust the attitude of the steel sleeve and correct the translation trajectory. Step 6, Positioning and Restoration: After moving to the design position, adjust the height adjustment sleeve (9) to raise the upper half (7) of the steel sleeve to the design elevation, weld the upper half (7) and the lower half (8) of the steel sleeve and lock the adjustable bearing support to complete the construction.

8. The construction method of the complex confined space large-diameter shield tunneling split translation system according to claim 7, characterized in that, In step 4, the translation methods include linear translation and / or directional translation.

9. The construction method of the complex confined space large-diameter shield tunneling split translation system according to claim 7, characterized in that, In step 5, after the adjustment of the bearing support is completed, the threaded screw (17) is tightened to fix the turning angle of the steel sleeve and the support, and the translation construction continues.

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