One-well three-machine shield staggered direction large split starting trolley bracket

Abstract

A one-well three-machine shield staggered direction large split starting trolley bracket comprises at least one layer of bracket unit, the bracket unit comprises a left row of vertical stand columns and a right row of vertical stand columns, and the two rows of vertical stand columns are connected into a whole through first longitudinal supports and second longitudinal supports respectively. The top ends of the two rows of vertical stand columns are connected through multiple sets of transverse supports and longitudinal supports to form a supporting platform. The'one-well three-machine 'shield staggered direction large split starting trolley bracket can effectively solve the technical problems that the arrangement of a rear matched trolley cannot be met due to a narrow site, and the technical problems that extension of a pipeline from the ground is not economical, high-altitude operation pipelines are difficult to install and fix, the pressure of an oil pressure pipeline is not stable, a plurality of shields are started in a split mode and the like are solved.

Description

Technical Field

[0001] The utility model relates to the field of super-deep circular vertical shaft shield split launching, in particular to a "one shaft three machines" shield machine staggered large split launching trolley bracket. Background Art

[0002] After nearly 200 years of development, shield technology has developed towards deeper and larger working shafts. The circular shaft support structure can convert the horizontal soil pressure outside the foundation pit into radial pressure acting on the circular horizontal support, which can exert the arch effect and make full use of the compressive properties of concrete, effectively reducing the deformation of the surrounding soil during foundation pit excavation. It has been widely used at home and abroad.

[0003] There are two main ways of launching: one is the overall launch, that is, setting up front and rear pilot tunnels at the bottom of the well, and after the length of the pilot tunnel reaches a certain requirement, the shield machine body and other supporting equipment are hoisted into the launching well together, and excavation starts after assembly and debugging. The other is the split launch, that is, when the shield launching well is small in size, the shield body or part of the trolley is hoisted into the launching well first, and the other part of the trolley is placed on the ground. The excavation starts forward by extending the pipeline, and when the shield excavation reaches the length that can accommodate the trolley and its supporting equipment, the supporting trolley is hoisted into the well for the second launch according to the overall launch mode.

[0004] The split launch of shield machines in ultra-deep circular shafts has long been a challenge in the industry. The "one shaft, three machines" (TBM) split launch is a rare practice both domestically and internationally. This practice involves launching three TBMs from the same shaft. The split launch refers to launching from the left line for longer distances and from the right line for shorter distances. The split launch involves hoisting the supporting trolley behind the TBM into the shaft. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a "one well, three machines" shield machine with a staggered large split starting trolley bracket, and stack the shield machine's rear supporting trolley on the starting trolley bracket, which can effectively solve the problem of narrow site that cannot accommodate the arrangement of the rear supporting trolley, avoid the uneconomical extension of pipelines from the ground, the difficulty in installing and fixing pipelines for high-altitude operations, the unstable pressure of pressurized pipelines, and the separate starting of multiple shield machines in one well.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A "one shaft, three machines" shield machine staggered large split starting trolley bracket includes at least one layer of bracket units, and the bracket units include two rows of left and right vertical columns. The two rows of vertical columns are respectively connected into a whole through a first longitudinal support and a second longitudinal support. The tops of the two rows of vertical columns are connected by multiple groups of horizontal supports and longitudinal supports to form a support platform.

[0008] The support platform includes a second transverse support, which is connected to the second longitudinal support to form a frame. The frame is reinforced by the transversely arranged first transverse support, the third transverse support and the longitudinally arranged third longitudinal support, and the support plate is fixed on the upper end face of the frame.

[0009] Passages are fixed on the left and right sides of the support platform.

[0010] Guardrails are fixed on both sides of the support platform and the upper end of the channel.

[0011] The vertical columns of each layer of bracket units and the first longitudinal support, the second longitudinal support, the vertical columns and the channel, the channel and the support platform, and the adjacent upper and lower bracket units are all installed and fixed by bolt assemblies equipped with springs, flat media and nuts.

[0012] The number of the bracket units is 1-5 layers, and mounting holes are provided on the bottom ends of the vertical columns and the second longitudinal supports of the bracket units in each layer.

[0013] The bottom bracket unit is reinforced by pre-buried ground anchor bolts.

[0014] The utility model provides a "one well, three machines" shield machine staggered large split starting trolley bracket, which has the following technical effects: it can not only effectively solve the problem that the narrow ground of the existing circular working well construction site cannot meet the requirements for the arrangement of the supporting trolleys, but also avoid the problems of uneconomical pipeline extension from the ground, difficulty in installing and fixing high-altitude working pipelines, and unstable pressure in pressurized pipelines. At the same time, it can also solve the problem of needing to carry out N (1≤N≤4) shield machine split starting in the same working well due to tight construction schedule. In this project, the main supporting trolleys of the shield machine are stacked on the starting trolley bracket at the bottom of the well, which improves the utilization rate of the limited space in the well, reduces labor intensity, and reduces cost investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 This is a left view of the present invention (①, ②, ③, ④ in the figure represent four-layer bracket units from bottom to top respectively).

[0018] Figure 3 It is the main view of the utility model.

[0019] Figure 4 This is a schematic diagram of a single-layer trolley bracket in the present invention (middle layer).

[0020] Figure 5This is a schematic diagram of a single-layer trolley bracket in the present invention (bottom layer).

[0021] Figure 6 for Figure 5 A local enlarged schematic diagram of point A in the middle.

[0022] In the figure: connecting bolt 1, vertical column 2, diagonal brace 3, ladder 4, first longitudinal support 5, second longitudinal support 6, third longitudinal support 7, first transverse support 8, second transverse support 9, third transverse support 10, passage 11, guardrail 12. DETAILED DESCRIPTION

[0023] like Figure 1-3 As shown, a large, split, and staggered starting trolley bracket for a "one shaft, three machines" shield tunneling system consists of at least one layer of bracket units. The number of bracket units can be 1-5, depending on the actual situation, to meet the shield tunneling requirements. Adjacent bracket units are bolted together and stacked from bottom to top. Each layer has a different height, ranging from 3.45m, 5.1m, 5.5m, and 5.2m from bottom to top.

[0024] like Figure 4-5 As shown, each layer of the bracket unit includes multiple groups of vertical columns 2, and the vertical columns 2 are arranged side by side with intervals on the left and right ( Figure 4 There are three vertical columns 2 on each side, with storage space reserved. Adjacent vertical columns 2 on the left are connected in the middle by a first longitudinal support 5 and at the top by a second longitudinal support 6. Adjacent vertical columns 2 on the right are connected in the middle by a first longitudinal support 5 and at the top by a second longitudinal support 6. The two rows of second longitudinal supports 6 on the left and right sides are connected in the middle by a first transverse support 8 and at both ends by a second transverse support 9. To further increase strength, the first transverse support 8 is connected to the second transverse supports 9 on both sides by a third longitudinal support 7 and multiple third transverse supports 10.

[0025] The second longitudinal support 6, third longitudinal support 7, first transverse support 8, second transverse support 9, and third transverse support 10 at the top form the support platform. A plate is laid on top of the support platform, and the supporting trolley is placed on the support platform. The trolley weighs over 50 tons and is heavy, so it does not need to be fixed and can be placed stably on the support platform.

[0026] A guardrail 12 is fixed on the outside of the support platform to ensure safety.

[0027] In addition, a channel 11 is fixed outside the two rows of second longitudinal supports 6 on the left and right sides, and the lower end of the outer edge of the channel 11 is fixed to the vertical column 2 through the diagonal brace 3. The channel 11 is provided to facilitate the horizontal passage of construction workers.

[0028] In addition, ladders 4 are vertically fixed outside the first longitudinal support 5 and the second longitudinal support 6, and the ladders 4 between the upper and lower adjacent bracket units are staggered. The ladders 4 are convenient for workers to go up and down the ladders.

[0029] In addition, the bolt assemblies used to create removable connections between the various components of each bracket layer and between adjacent bracket units are equipped with spring washers, flat washers, and nuts. The advantages of using spring washers and flat washers include: They utilize the elasticity of the spring washers to prevent loosening. Once tightened, the elasticity of these washers effectively prevents the screws from loosening, ensuring a secure connection. Flat washers protect the surfaces of the connected components from damage.

[0030] In addition, after the bottom bracket unit is in place, it is reinforced with pre-buried ground anchors to prevent the bracket from loosening.

[0031] In addition, the vertical columns 2, diagonal braces 3, ladders 4, first longitudinal supports 5, second longitudinal supports 6, third longitudinal supports 7, first transverse supports 8, second transverse supports 9, third transverse supports 10, and channels 11 in this device are respectively made of Q345B, and the overall weight is about 60t.

[0032] The project's No. 1 working shaft has an inner diameter of 33 meters, an outer diameter of 36 meters, and a depth of approximately 63 meters. It consists of 24 zigzag diaphragm walls, each 800 mm thick, with 10 internal ring beams and one ring plate support. The working shaft's tunnel has a net axial width of 17.78 meters and a maximum lateral width of 31 meters.

Claims

1. A "one shaft, three machines" shield machine with staggered large split starting trolley bracket, characterized by: The invention comprises at least one layer of bracket units, wherein the bracket units comprise two rows of left and right vertical columns (2), the two rows of vertical columns (2) are connected to form a whole through a first longitudinal support (5) and a second longitudinal support (6), and the top ends of the two rows of vertical columns (2) are connected through multiple groups of transverse supports and longitudinal supports to form a support platform.

2. The "one shaft, three machines" shield machine staggered large split starting trolley bracket according to claim 1 is characterized by: The support platform includes a second transverse support (9), which is connected to the second longitudinal support (6) to form a frame. The frame is reinforced by a transversely arranged first transverse support (8), a third transverse support (10) and a longitudinally arranged third longitudinal support (7), and the support plate is fixed to the upper end surface of the frame.

3. The "one shaft, three machines" shield machine staggered large split starting trolley bracket according to claim 2 is characterized by: Channels (11) are fixed on the left and right sides of the support platform.

4. The "one shaft, three machines" shield machine staggered large split starting trolley bracket according to claim 3 is characterized by: Guardrails (12) are fixed on both sides of the upper end of the support platform and the channel (11).

5. The "one shaft, three machines" shield machine staggered large split starting trolley bracket according to claim 4 is characterized by: The vertical columns (2) of each layer of bracket units and the first longitudinal support (5), the second longitudinal support (6), the vertical columns (2) and the channel (11), the channel (11) and the support platform, and the adjacent upper and lower bracket units are all installed and fixed by bolt assemblies equipped with spring media, flat media and nuts.

6. The "one shaft, three machines" shield machine staggered large split starting trolley bracket according to claim 5 is characterized by: The number of the bracket units is 1-5 layers, and mounting holes are provided on the bottom ends of the vertical columns (2) and the second longitudinal supports (6) of the bracket units of each layer.

7. The "one shaft, three machines" shield machine staggered large split starting trolley bracket according to claim 6 is characterized by: The bottom bracket unit is reinforced by pre-buried ground anchor bolts.

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