Shield type tunnel boring machine (TBM) duct piece dislocation and damage safety protection device

Abstract

The utility model discloses a shield type tunnel boring machine (TBM) duct piece dislocation and damage safety protection device, and belongs to the technical field of TBM construction. Firstly, the two first steel arch frames and the second steel arch frame jointly form the arc protection frame, and transportation and installation of the arc protection frame are facilitated. The first steel arch frame and the second steel arch frame are connected through the connecting bolts, and the stability of the arc protection frame structure is guaranteed. The arc protection frame is fixed on the duct piece through a third connecting piece and an expansion bolt; therefore, the arc protection frame is tightly attached to the duct piece, and the duct piece is supported and protected. The distance between the first steel arch and the track is adjusted through the steel plate cushion block. The horizontal supporting end is arranged at one end of the first steel arch, and reverse supporting force is provided, so that the overturning risk can be remarkably reduced, and the stability of the arc protection frame in the installation process is improved. And construction safety risks caused by pipe piece dislocation, structural cracks and the like due to uneven stress are avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of TBM construction, specifically relates to a shield type TBM segment misalignment and broken safety protection device. BACKGROUND

[0002] With the vigorous development of infrastructure construction in the fields of traffic, energy, water conservancy and hydropower, TBM (full-face tunnel boring machine) is more and more applied to various high-risk complex geological conditions, and super-long deep-buried complex mountain tunnel is constructed. Shield TBM improves the safety of on-site construction personnel by installing segments to close surrounding rock.

[0003] However, during the TBM excavation, due to the complex and changeable geological conditions, the surrounding rock in the fault fracture zone and the affected zone will rapidly converge and deform after the segment is installed, and the surrounding rock stress will be generated. At the same time, the collapse of the tunnel crown may cause the segment to be pressed by the gravity of the collapse. These external forces make the installed segment bear uneven stress, causing the segment to protrude inward and form misalignment and structural cracks and other damage problems. If it is not treated continuously, it may cause the segment to fall off, and further cause the risk of tunnel collapse, which seriously affects the safety of the construction personnel in the tunnel.

[0004] Therefore, the present application provides a safety protection device. The device can effectively solve the problems of segment misalignment and structural cracks caused by uneven stress without affecting the normal material transportation in the tunnel, prevent continuous deformation of the segment, and thus ensure construction safety. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model lies in providing a shield type TBM segment misalignment and broken safety protection device in view of the deficiencies in the prior art.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of:

[0007] A shield type TBM segment misalignment and broken safety protection device, comprising two first steel arches, a second steel arch, a connecting cross bar and a steel plate cushion block;

[0008] One end of the first steel arch is fixedly provided with a first connecting plate, and the other end is provided with a horizontal support end; both ends of the second steel arch are fixedly provided with a second connecting plate; the second connecting plate is connected with the first connecting plate of the two first steel arches through connecting bolts, and an arc protection frame for supporting the segment is formed;

[0009] The connecting cross bar connects between the adjacent arc protection frames; the spacing between the adjacent arc protection frames is less than half the width of the segment;

[0010] Steel plate cushion is used to be arranged between horizontal support end and track to avoid first steel arch frame from sliding down, upper surface of steel plate cushion is lower than track surface;

[0011] At least one third connecting plate is fixed on first steel arch frame, expansion bolt passes through third connecting plate and is fixed with segment.

[0012] Further, at least one third connecting plate is fixed on both sides of first steel arch frame.

[0013] Further, first connecting plate and third connecting plate are fixed on first steel arch frame by welding; second connecting plate is fixed on second steel arch frame by welding.

[0014] Further, first connecting plate, second connecting plate and third connecting plate are all steel plates with size of 60mm*60mm*6mm.

[0015] Further, cross section shape of first steel arch frame and second steel arch frame is I-shaped.

[0016] Further, first connecting plate of second connecting plate and two first steel arch frames are connected by welding.

[0017] Further, surface of first steel arch frame, second steel arch frame, connecting cross rod and steel plate cushion is coated with anticorrosive coating.

[0018] Compared with prior art, the utility model has following advantages:

[0019] Firstly, the utility model discloses a circular arc protection frame which is composed of two first steel arch frames and a second steel arch frame, so that the transportation and installation of the circular arc protection frame are facilitated. The first steel arch frame and the second steel arch frame are connected by connecting bolts, so that the stability of the structure of the circular arc protection frame is ensured. The circular arc protection frame is fixed on the segment by the third connecting piece and the expansion bolt, so that the circular arc protection frame is tightly attached to the segment and the segment is protected. The distance between the first steel arch frame and the track is adjusted by the steel plate cushion. The horizontal support end is arranged at one end of the first steel arch frame, and the reverse supporting force is provided, so that the overturning risk is significantly reduced and the stability of the circular arc protection frame during installation is ensured. The construction safety risk caused by the segment misalignment and structural cracks due to uneven stress is avoided.

[0020] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments. DRAWINGS

[0021] Figure 1 The structure of the utility model is shown in the direction of the cross section.

[0022] Figure 2The utility model discloses a shield type TBM segment misalignment and damage safety protection device embodiment's main view partial structure schematic diagram.

[0023] Figure 3 For Figure 2 The enlarged view at A;

[0024] Figure 4 For Figure 2 The enlarged view at B;

[0025] Figure 5 For Figure 2 The enlarged view at C;

[0026] Figure 6 The utility model discloses a shield type TBM segment misalignment and damage safety protection device embodiment's steel plate cushion block installation position structure schematic diagram.

[0027] Mark explanation:

[0028] 1, first steel arch; 2, second steel arch; 3, connecting cross bar; 4, steel plate cushion block;

[0029] 5, first connecting plate; 6, horizontal support end; 7, second connecting plate; 8, connecting bolt;

[0030] 9, third connecting plate; 10, track surface; 11, segment. Specific implementation

[0031] Shield type TBM segment misalignment and damage safety protection device embodiment:

[0032] As Figures 1-6 Illustrated, this embodiment is with TBM excavation diameter 4.03m, segment 11 inner diameter 3.2m for example to explain.

[0033] Shield type TBM segment misalignment and damage safety protection device includes two first steel arch 1, a second steel arch 2, connecting cross bar 3 and steel plate cushion block 4.The first steel arch 1 one end is fixed with first connecting plate 5, and the other end is provided with horizontal support end 6.The both ends of second steel arch 2 are fixed with second connecting plate 7.The outer diameter of first steel arch 1 and second steel arch 2 in this embodiment is 3200mm, and the inner diameter is 2920mm, and the outer arc length is 2922mm, and the inner arc length is 2666mm.

[0034] The second connecting plate 7 is connected with the first connecting plate 5 of the two first steel arches 1 through the connecting bolt 8, and forms an arc protection frame for supporting the segment 11. That is, the arc protection frame is formed by the two first steel arches 1 and the second steel arch 2. By setting the arc protection frame with a segmented structure, transportation and installation are facilitated. The cross-sectional shape of the first steel arch 1 and the second steel arch 2 is an I-shaped section. In this embodiment, the first steel arch 1 and the second steel arch 2 are made of I14# I-shaped steel.

[0035] In order to ensure the protection effect on the damaged segment 11, the adjacent arc protection frames are connected through the connecting cross bar 3. The spacing between the adjacent arc protection frames is less than half the width of the segment 11.

[0036] In order to facilitate the adjustment of the spacing between the arc protection frame and the track, the steel plate pad 4 is used to be arranged between the horizontal support end 6 and the track to prevent the first steel arch 1 from sliding down. The upper surface of the steel plate pad 4 is lower than the track surface 10, so as to ensure that the arc protection frame can closely contact the segment 11.

[0037] In order to fix the position of the arc protection frame, at least one third connecting plate 9 is fixed on the first steel arch 1, and the expansion bolt passes through the third connecting plate 9 and is fixed with the segment 11.

[0038] The first steel arch 1 is provided with at least one third connecting plate 9 on both sides. The third connecting plate 9 can firmly connect the first steel arch 1 with the segment 11 to form a whole. This connection mode can effectively prevent the steel arch from being laterally displaced or overturned under the action of lateral force, thereby improving the stability of the whole structure.

[0039] The first connecting plate 5 and the third connecting plate 9 are fixed on the first steel arch 1 by welding; and the second connecting plate 7 is fixed on the second steel arch 2 by welding.

[0040] The first connecting plate 5, the second connecting plate 7 and the third connecting plate 9 are all steel plates with a size of 60mm×60mm×6mm.

[0041] The second connecting plate 7 is connected with the first connecting plate 5 of the two first steel arches 1 by welding. That is, the first steel arch 1 and the second steel arch 2 are connected by welding and the connecting bolt 8.

[0042] The surfaces of the first steel arch 1, the second steel arch 2, the connecting cross bar 3 and the steel plate pad 4 are coated with an anti-corrosion coating, so as to prolong the service life of the protection device.

[0043] The utility model discloses a first steel arch 1 and second steel arch 2 are first preassembled outside the hole, and the size of first steel arch 1, second steel arch and connecting cross bar 3 is checked, then each component of the protection device is transported to the position needing protection. The water supply pipe and the drain pipe are removed. Because smoke can be produced when welding, a axial flow fan can be installed in the protection position in advance, to ensure that the working environment meets the relevant requirements. The horizontal support end head 6 of first steel arch 1 is put on the track first, and the gap between first steel arch 1 and the track is adjusted by using steel plate cushion block 4; second steel arch 2 is installed; second steel arch is connected with first steel arch 1 through connecting bolt 8, and then welding reinforcement is carried out; then, first steel arch 1 is fixed on pipe piece 11 through expansion bolt; the connection of circular arc protection frame is completed; finally, adjacent circular arc protection frames are connected by connecting cross bar 3.

[0044] If the pipe piece 11 is misaligned greatly, when the circular arc protection frame is closely attached to the inner wall of pipe piece 11, the circular arc protection frame can be placed on the pipe piece 11 in advance to try to assemble, only simple reinforcement is carried out, and the circular arc protection frame is adjusted according to the actual situation of misalignment, so that it is closely attached to the inner wall of pipe piece 11 as much as possible.

[0045] When the tunnel is through, the installed safety protection device is removed, and the misaligned pipe piece 11 area and damaged pipe piece 11 area are replaced according to the design requirements.

[0046] The above is only the preferred embodiment of the utility model, and does not limit the utility model, any simple modification, change and equivalent structure change according to the technical essence of the utility model are still within the protection scope of the utility model technical scheme.

Claims

1. A shield TBM segment misalignment and breakage safety protection device, characterized in that: The utility model relates to a kind of steel arch support structures, including two first steel arches (1), a second steel arch (2), connecting cross bar (3) and steel plate cushion block (4); One end of the first steel arch (1) is fixedly provided with a first connecting plate (5), and the other end is provided with a horizontal support end (6). Both ends of the second steel arch (2) are fixedly provided with a second connecting plate (7). The second connecting plate (7) is connected with the first connecting plate (5) of the two first steel arches (1) by connecting bolts (8), respectively, to form an arc protection frame for supporting the pipe piece (11). The adjacent arc protection frames are connected by connecting cross bars (3). The spacing between adjacent arc protection frames is less than half the width of the pipe piece (11). The steel plate cushion block (4) is used to be arranged between the horizontal support end (6) and the track to prevent the first steel arch (1) from sliding down. The upper surface of the steel plate cushion block (4) is lower than the track surface (10). At least one third connecting plate (9) is fixed on the first steel arch (1). The expansion bolt passes through the third connecting plate (9) and is fixed with the pipe piece (11).

2. A shield TBM segment misalignment and breakage safety shield device according to claim 1, characterized in that: At least one third connecting plate (9) is fixed on both sides of the first steel arch (1).

3. A shield TBM segment misalignment and breakage safety shield device according to claim 1, characterized in that: The first connecting plate (5) and the third connecting plate (9) are fixed on the first steel arch (1) by welding. The second connecting plate (7) is fixed on the second steel arch (2) by welding.

4. A shield TBM segment misalignment and breakage safety shield device according to claim 1, characterized in that: The first connecting plate (5), the second connecting plate (7) and the third connecting plate (9) are all steel plates with a size of 60mm×60mm×6mm.

5. A shield TBM segment misalignment and breakage safety shield device according to claim 1, characterized in that: The cross-sectional shape of the first steel arch (1) and the second steel arch (2) is H-shaped.

6. A shield TBM segment misalignment and breakage safety shield device according to claim 1, characterized in that: The first connecting plate (5) and the third connecting plate (9) are fixed on the first steel arch (1) by welding. The second connecting plate (7) is fixed on the second steel arch (2) by welding.

7. A shield TBM segment misalignment and breakage safety shield device according to claim 1, characterized in that: The surface of the first steel arch (1), the second steel arch (2), the connecting cross bar (3) and the steel plate cushion block (4) is coated with an anti-corrosion coating.

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