Auxiliary device for shield tunneling to pass through mining method tunnel in long-distance empty pushing mode

Abstract

The utility model discloses an auxiliary device for a shield tunneling machine to pass through a mining method tunnel in a long-distance empty pushing mode, which comprises a concrete guide table, a pre-buried steel plate, an empty pushing track, a shield tunneling machine outer contour line, a duct piece gasket, a force transmission duct piece, a limiting device, a sleeper and a matched track, the duct piece gasket is arranged at the lower end of the force transmission duct piece, and the force transmission duct piece is longitudinally arranged. The limiting devices are arranged on the two sides of the force transmission pipe piece. The combined structure has the advantages that the combined structure of concrete guide table construction, duct piece liner laying and force transfer duct piece splicing, shield empty pushing and limiting device installation and sleeper and track laying is adopted, the requirements of shield empty pushing and rear matching follow-up can be met, the work efficiency is high, the construction period is short, the construction cost is low, and the construction efficiency is high. The auxiliary device and the construction method are suitable for construction operation of the shield tunneling machine passing through the mining method tunnel in a long-distance empty pushing mode.

Description

Technical Field

[0001] The utility model relates to the technical field of shield tunnel engineering, and particularly relates to an auxiliary device for a shield to push through a mined-tunnel over a long distance in an empty state. Background Technique

[0002] With the rapid development of infrastructure construction, shield technology has been widely used in engineering fields such as highways, rail transit, and municipal pipelines, and has the advantages of high work efficiency, safety, environmental protection, and little impact.

[0003] However, shield tunnels are currently mostly used for the tunnel sections of the bid sections. For the enlarged tunnel sections at the line intersection sections, they are not only not applicable, but there are also various difficulties in pushing the shield in an empty state, such as narrow space, long empty-pushing distance, and no support points for the shield jacks.

[0004] Currently, the commonly used methods include a combination of plain concrete backfilling, shield tunneling, integral segment assembling, and grouting behind the segments. This not only requires a large amount of concrete, segments, and slurry, but also has a cumbersome construction method, slow work efficiency, high difficulty, long cycle, poor environmental protection, and great danger in the later removal of segments. Therefore, an auxiliary device that is material-saving, energy-saving, efficient, environmentally friendly, and green and low-carbon is urgently needed for a shield to push through a mined-tunnel over a long distance in an empty state. Content of the Utility Model

[0005] The purpose of the utility model is to provide an auxiliary device for a shield to push through a mined-tunnel over a long distance in an empty state, so as to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An auxiliary device for a shield to push through a mined-tunnel over a long distance in an empty state provided by the utility model includes a concrete guide platform, embedded steel plates, empty-pushing tracks, the outer contour line of the shield machine, segment gaskets, force-transferring segments, limiting devices, sleepers, and supporting tracks. The segment gaskets are arranged at the lower ends of the force-transferring segments, the force-transferring segments are arranged longitudinally, and the limiting devices are arranged on both sides of the force-transferring segments.

[0008] Further, the limiting device includes vertical rods, diagonal braces, and clamping pieces, and the limiting device is connected to the embedded steel plates through bolts.

[0009] Further, the vertical rods, the diagonal braces, and the embedded steel plates are fixedly connected through bolts.

[0010] Further, the clamping pieces are arc-shaped and fit with the force-transferring segments, and the clamping pieces are fixedly connected to the vertical rods through bolts.

[0011] Further, the empty-pushing track is located below the outer contour line of the shield machine, and the embedded steel plate is located at the lower end of the empty-pushing track.

[0012] Further, the segment gasket is arranged between the concrete guide platform and the force-transferring segment, and the segment gaskets are arranged in a crisscross pattern.

[0013] Further, both the concrete guide platform and the outer contour line of the shield machine are U-shaped.

[0014] Further, the embedded steel plate extends into the concrete guide platform through anchor bars, and two ear plates connected to the limiting device are also provided on the embedded steel plate.

[0015] Beneficial effects: The auxiliary device for the shield machine to push through the mine tunneling method tunnel over a long distance provided by the present utility model adopts a combined structure of concrete guide platform construction, segment gasket laying, force-transferring segment assembly, shield empty-pushing, limiting device installation, sleeper and track laying, which can not only meet the needs of shield empty-pushing and follow-up of the rear support, but also has high work efficiency, short construction period and low construction cost. This auxiliary device and construction method are applicable to the construction operation of the shield machine pushing through the mine tunneling method tunnel over a long distance. Description of the Drawings

[0016] Figure 1 It is a sectional view of the overall structure of the present utility model;

[0017] Figure 2 It is a schematic diagram of the A-A section of the present utility model;

[0018] Figure 3 It is a schematic diagram of the B-B section of the present utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the limiting device of the present utility model.

[0020] Reference Signs

[0021] 1 - Concrete guide platform, 2 - Embedded steel plate, 3 - Empty-pushing track, 4 - Outer contour line of the shield machine, 5 - Segment gasket, 6 - Force-transferring segment, 7 - Limiting device, 701 - Vertical rod, 702 - Diagonal brace, 703 - Clip, 8 - Sleeper, 9 - Supporting track. Detailed Embodiments

[0022] The following are specific embodiments of the present utility model in combination with the drawings, and the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0023] Embodiment

[0024] As Figures 1-4As shown in the figure, an auxiliary device for a shield tunneling machine to push through a mined tunnel over a long distance includes a concrete guide platform 1, embedded steel plates 2, a pushing track 3, the outer contour line 4 of the shield tunneling machine, segment gaskets 5, force-transferring segments 6, a limiting device 7, sleepers 8, and a supporting track 9. The segment gasket 5 is arranged at the lower end of the force-transferring segment 6. The force-transferring segments 6 are arranged longitudinally. The limiting device 7 is arranged on both sides of the force-transferring segment 6.

[0025] The limiting device 7 includes a vertical rod 701, a diagonal brace 702, and a clamping piece 703. The limiting device 7 is connected to the embedded steel plate 2 by bolts. The vertical rod 701 and the diagonal brace 702 are fixedly connected to the embedded steel plate 2 by bolts. The clamping piece 703 is arc-shaped and fits with the force-transferring segment 6. The clamping piece 703 is fixedly connected to the vertical rod 701 by bolts.

[0026] The segment gasket 5 is arranged between the concrete guide platform 1 and the force-transferring segment 6, and the segment gasket 5 is arranged in a crisscross pattern. The segment gasket 5 is made of square timbers arranged in a crisscross pattern under the force-transferring segment 6 to support the force-transferring segment 6 and the jack thrust of the shield tunneling machine, so that the segment lining of the shield tunnel is in a straight line. The segment gasket 5 can also be laid with profiled steel or medium sand. The segment gasket 5 should have sufficient strength and stiffness to prevent the longitudinally assembled force-transferring segment 6 from generating downward settlement deformation under the action of eccentric jack thrust, self-weight, and additional weight.

[0027] Both the concrete guide platform 1 and the outer contour line 4 of the shield tunneling machine are U-shaped. The concrete guide platform 1 can be designed in a circular arc shape or a U shape according to the tunnel axis, elevation, and the shape of the shield tunneling machine. According to the geological conditions of the surrounding rock in the tunnel, it can be constructed after the tunnel invert is completed, or it can be directly constructed on the bedrock with sufficient strength. After the concrete guide platform 1 reaches a certain design strength, the pushing track 3 can be installed and stiffening plates can be added on both sides for fixation to ensure the stability of the track.

[0028] The embedded steel plate 2 extends into the concrete guide platform 1 through anchor bars. The embedded steel plate 2 needs to be embedded during the pouring of the concrete guide platform 1. There are also two ear plates connected to the limiting device 7 on the embedded steel plate 2. The ear plates are provided with bolt holes and are connected to the limiting device 7 through the ear plates. The height of the ear plates is lower than the height of the pushing track 3 arranged on the embedded steel plate 2, so as not to affect the pushing of the shield tunneling machine. In this way, the function of fixing the pushing track 3 and the limiting device 7 on the pushing guide platform through the embedded steel plate 2 is realized. For the pushing track 3 and the limiting device 7, a single embedded steel plate 7 can be used separately, or the same embedded steel plate 7 can be shared.

[0029] In this embodiment, the concrete guide platform 1 is poured after the bedding and invert arch 0 of the mined tunnel are completed. Its shape is U-shaped according to the outer contour line 4 of the shield machine. The embedded steel plate 2 is embedded during the pouring of the concrete guide platform 1. Anchor bars are inserted into the concrete guide platform 1 under the plate. Each plate is provided with two ear plates with bolt holes for fixing limit devices. After the concrete guide platform 1 reaches a certain design strength, the empty push track 3 used for shield empty pushing can be installed, and stiffening plates are added on both sides for fixation to ensure the stability of the track. The segment cushion 5 is arranged in a crisscross pattern of square timbers under the force-transferring segment 6 to support the force-transferring segment 6 in a straight line with the shield machine jack thrust and the segment lining of the shield tunnel. In addition, the segment cushion 5 can also be laid with steel sections or medium sand. It should be noted that the segment cushion 5 should have sufficient strength and stiffness to prevent the longitudinally assembled force-transferring segments from settling and deforming downward under the action of eccentric jack thrust, self-weight, and pressing weight. The vertical rod 701, diagonal brace 702, and clip 703 of the limit device 7 are all made of channel steel. The vertical rod 701, diagonal brace 702 are bolted to the embedded steel plate 2, the vertical rod 701 is bolted to the diagonal brace 702, and the clip 703 is bolted to the vertical rod 701.

[0030] The construction method for the long-distance shield empty pushing through the mined tunnel provided by the present utility model includes four construction steps, which are specifically as follows:

[0031] First step, according to the construction plan, after the excavation of the mined tunnel is completed or the invert arch is poured and before the shield machine is received, the concrete guide platform is constructed in advance, the embedded steel plate is embedded, and the steel rails for empty pushing are laid and lubricating butter is applied.

[0032] Second step, after the concrete guide platform reaches a certain strength, the shield machine is received and empty pushed. The segment cushion is laid in a timely manner and the lower force-transferring segments are assembled to support the shield machine pushed by the jacks.

[0033] Third step, after the force-transferring segments are assembled, the limit devices are installed on both sides in a timely manner, and the sleepers and steel rails for the subsequent support of the shield are laid on the force-transferring segments.

[0034] Fourth step, the second and third steps are repeated in sequence until the shield empty pushing is completed.

[0035] To sum up, the auxiliary device and construction method for the long-distance shield empty pushing through the mined tunnel provided in this embodiment can meet the actual engineering needs. The auxiliary device has a simple structure, less consumables, can reduce the engineering construction cost, improve work efficiency, and has strong adaptability and practicability, and has a certain promotion value.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An auxiliary device for a shield tunneling machine to push through a mine tunneling method tunnel over a long distance, characterized in that: It includes a concrete guide platform, embedded steel plates, a jacking track, the outline of a shield machine, segment gaskets, force-transferring segments, a limiting device, sleepers and a supporting track. The segment gasket is arranged at the lower end of the force-transferring segment. The force-transferring segments are arranged longitudinally. The limiting device is arranged on both sides of the force-transferring segment.

2. The auxiliary device for shield tunneling over a long distance through a mined tunnel according to claim 1, characterized in that: The limiting device includes a vertical rod, a diagonal brace and a clip. The limiting device is connected to the embedded steel plate by bolts.

3. The auxiliary device for a shield tunneling through a mined tunnel over a long distance according to claim 2, characterized in that: The vertical rod and the diagonal brace are fixedly connected to the embedded steel plate by bolts.

4. The auxiliary device for the shield to push through the mine tunneling method tunnel over a long distance according to claim 2, wherein: The clip is arc-shaped and fits with the force-transferring segment. The clip is fixedly connected to the vertical rod by bolts.

5. An auxiliary device for a shield tunneling machine to push through a mine tunneling method tunnel over a long distance according to claim 1, characterized in that: The jacking track is located below the outline of the shield machine, and the embedded steel plate is located at the lower end of the jacking track.

6. The auxiliary device for a shield tunneling through a mined tunnel over a long distance according to claim 1, characterized in that: The segment gasket is arranged between the concrete guide platform and the force-transferring segment, and the segment gaskets are arranged in a crisscross pattern.

7. The auxiliary device for a shield tunneling through a mining method tunnel over a long distance according to claim 1, characterized in that: Both the concrete guide platform and the outline of the shield machine are U-shaped.

8. An auxiliary device for a shield tunneling through a mined tunnel over a long distance according to claim 1, characterized in that: The embedded steel plate extends into the concrete guide platform through anchor bars, and there are also two ear plates on the embedded steel plate connected to the limiting device.

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