Efficient propelling station-crossing device for ultra-large-diameter slurry shield

Abstract

The invention discloses an efficient propelling station-crossing device for an ultra-large-diameter slurry shield, which comprises a base arranged in a working well and arranged between a starting hole and a receiving hole of the working well, an arc-shaped supporting surface for supporting a station-crossing shield machine is formed on the base, and the arc-shaped supporting surface is used for supporting the station-crossing shield machine; the radian of the arc-shaped supporting face is matched with the radian of the outer wall of the station-crossing shield tunneling machine, the inner arc face of the arc-shaped supporting face is arranged upwards, and guide rails used for being embedded in outer edge notches of a cutter head of the station-crossing shield tunneling machine are arranged on the two opposite sides in the arc forming direction of the arc-shaped supporting face respectively. The translation counter-force frame comprises a plurality of arc-shaped pipe pieces which are laid on the arc-shaped supporting face and are coaxial with the station-crossing shield tunneling machine, the arc-shaped pipe pieces are arranged in the length direction of the arc-shaped supporting face, and one end of the translation counter-force frame is supported on a receiving ring in the receiving hole; and the starting counter-force frame is formed at the other end of the translation counter-force frame in a post-pouring manner. The problem that an existing shield tunneling station-crossing method is large in later-stage dismantling is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of shield construction, and particularly relates to an efficient propulsion and passing-through station device for an extra-large diameter slurry shield machine. Background Art

[0002] During the construction of a shield tunnel, conventional shield passing-through station methods include the backfilling passing-through station method and the separation of the main machine and the rear support of the shield machine for passing through the station.

[0003] For the backfilling passing-through station method, this method first constructs a mortar base in the working shaft, and then backfills the shaft with soil or foam concrete to create a construction environment similar to the shield machine advancing in the soil in the working shaft. The backfilled soil is used to balance the water and soil pressures inside and outside the shaft. After the shield machine passes through the station, grouting is carried out on the starting and receiving portal openings, and then the backfilled soil or foam concrete is excavated, and the portal openings are blocked at the same time. Finally, the segments in the working shaft are removed to complete the passing-through station construction.

[0004] For the separation of the main machine and the rear support of the shield machine for passing through the station, a special steel base (this base is also used as the shield receiving and starting base) is generally used. After the shield machine receives and sits on the base, the main body of the shield machine is separated from the frame. The steel base is jacked and translated. After the shield machine arrives in place on the steel base, a reinforced concrete structure for the frame to travel and the starting reaction frame is poured. After curing in place, the frame is towed into place, and finally the main body of the shield machine is connected to the frame. After re-adjustment, the shield machine starts.

[0005] Regarding the backfilling passing-through station method, this method is generally used for small-diameter shield machines to pass through the station. When applied to the passing-through station construction of large-diameter highway tunnels, due to the large volume of the working shaft, the volume of soil or foam concrete to be backfilled is huge. At the same time, the workload of cleaning the soil or foam concrete is large, the construction period is long, and the cost is relatively high. In terms of removing the segments in the shaft, since the passing-through station backfilling method requires the assembled segments to form a tunnel during the construction in the shaft, the number of segments in a large-diameter tunnel is large and the self-weight is heavy. Because of the need for lateral support force of the working shaft in large highway tunnels, foundation pit support structures such as structural slabs and concrete supports are arranged above the shield construction layer. The removed segments need to be translated to the hoisting opening for vertical transportation after removal, which increases the difficulty and construction period of removing the segments. At the same time, due to ensuring construction safety during the removal process, the tunnel structure in the shaft cannot be constructed and passed through, which has a certain impact on the overall construction period of the project.

[0006] This solution can be applied to the translation of shield machines in various working shafts for the separation of the rear supporting parts of the shield machine mainframe, but it also has great limitations. For this project, the shield construction period is tight and there are many limitations: the shield machine mainframe and each section of the frame need to disconnect the structural connectors, pipes and cables during the translation process, which is complicated to construct; the steel base needs to be equipped with a complex jack system. The bottom plate needs to be leveled with yellow sand and steel plates, which is a large amount of work; after the mainframe is translated to the starting position, a concrete frame walking base needs to be constructed, which takes a long time to construct and maintain; after the shield machine mainframe and the rear supporting frames are all translated into place, they need to be reconnected and re-debugged, which takes a certain period of time. Summary of the invention

[0007] In order to overcome the defects of the prior art, an efficient advancing and passing station device for an ultra-large diameter slurry shield is provided to solve the problem of large later demolition in the existing shield advancing and passing station method.

[0008] In order to achieve the above-mentioned purpose, a highly efficient propulsion and transit device for an ultra-large diameter slurry shield is provided, comprising:

[0009] A base is arranged in the working shaft, the base is arranged between the starting hole and the receiving hole of the working shaft, an arc-shaped support surface for supporting the station-passing shield machine is formed on the base, the curvature of the arc-shaped support surface is adapted to the curvature of the outer wall of the station-passing shield machine, the inner arc surface of the arc-shaped support surface is arranged upward, and guide rails for being embedded in the outer edge notch of the cutter head of the station-passing shield machine are respectively arranged on opposite sides of the arc-forming direction of the arc-shaped support surface;

[0010] A translation reaction frame for supporting the lower side of the shield tail, comprising a plurality of arcuate segments laid on the arcuate support surface and arranged coaxially with the station-passing shield machine, wherein the plurality of arcuate segments are arranged along the length direction of the arcuate support surface, and one end of the translation reaction frame is supported on a receiving ring in the receiving hole;

[0011] An initial reaction frame for supporting the shield tail is formed at the other end of the translation reaction frame by post-casting.

[0012] Furthermore, the central angle of the arc-shaped supporting surface is greater than 68°.

[0013] Furthermore, the arc-shaped supporting surface is formed with a reserved groove, an anchor is provided in the reserved groove, and the anchor is connected to the arc-shaped pipe segment.

[0014] Furthermore, the arc-shaped segment includes three wedge-shaped segments.

[0015] Furthermore, the three wedge-shaped segments are B1 to B3, or B5 to B7.

[0016] Furthermore, a caulking plate is provided between two adjacent wedge-shaped segments. The connecting bolts of two adjacent wedge-shaped segments penetrate through the caulking plate, and the anchor is connected to the caulking plate.

[0017] Furthermore, a steel bar coupler is embedded at the bottom of the reserved groove, and the steel bar coupler is connected to the anchor through a connecting steel bar.

[0018] The beneficial effects of the present invention are as follows: The high-efficiency propulsion and passing-through station device for an extra-large diameter slurry shield of the present invention constructs a base between the receiving opening and the launching opening of the working shaft to carry the shield machine. During the propulsion and passing-through station of the shield machine, a translation reaction frame is first laid on the base, and then a launching reaction frame is poured to enable the shield machine to enter the launching opening, greatly reducing the later cutting and chiseling workload and improving the construction efficiency. On the other hand, the high-efficiency propulsion and passing-through station device for an extra-large diameter slurry shield of the present invention has low requirements for equipment and personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more apparent:

[0020] Figure 1 It is a schematic structural diagram of the high-efficiency propulsion and passing-through station device for an extra-large diameter slurry shield according to an embodiment of the present invention.

[0021] Figure 2 It is a top view of the high-efficiency propulsion and passing-through station device for an extra-large diameter slurry shield according to an embodiment of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the base according to an embodiment of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the translation reaction frame according to an embodiment of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the launching reaction frame according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the related invention and not for limiting the invention. Additionally, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings.

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0027] Refer to Figures 1 to 5As shown, the present invention provides an efficient propulsion passing-station device for an extra-large diameter slurry shield, including: a base 1, a translation reaction frame 2, and a launching reaction frame 3.

[0028] In this embodiment, referring to Figure 1 and Figure 2 as shown, the base 1 is arranged in the working shaft 4. The base 1 is disposed between the launching opening a and the receiving opening b of the working shaft 4.

[0029] Specifically, the width of the base gradually decreases from bottom to top. An arc-shaped supporting surface 10 is formed on the base 1. The arc-shaped supporting surface 10 is used to support the passing-station shield machine. The radian of the arc-shaped supporting surface 10 is adapted to the radian of the outer wall of the passing-station shield machine. The inner arc surface of the arc-shaped supporting surface 10 is arranged upward. Guide rails 11 are respectively arranged on the opposite sides in the arc-forming direction of the arc-shaped supporting surface 10. The guide rails 11 are used to be embedded in the outer-edge notches of the cutter head of the passing-station shield machine.

[0030] The translation reaction frame 2 is used to support the lower side of the end face of the shield tail.

[0031] Specifically, the translation reaction frame 2 includes multiple arc-shaped segments 21. The multiple arc-shaped segments 21 are laid on the arc-shaped supporting surface 10. The multiple arc-shaped segments 21 are coaxially arranged with the passing-station shield machine. The multiple arc-shaped segments 21 are arranged along the length direction of the arc-shaped supporting surface 10. One end of the translation reaction frame 2 is supported on the receiving ring 41 in the receiving opening b.

[0032] As a preferred embodiment, the arc-shaped segment 21 includes three wedge-shaped segments.

[0033] In this embodiment, referring to Figure 4 as shown, the three wedge-shaped segments are B1 to B3 segments, or B5 to B7 segments.

[0034] Referring to Figure 3 as shown, the two guide rails (i.e., guiding rails) on the base are 120 mm × 120 mm square rails. The positions of the guide rails are adapted to the notches of the cutter head, so that the rails are embedded in the notches of the cutter head.

[0035] As a preferred embodiment, the central angle of the arc-shaped supporting surface 10 is greater than 68°. The two sides of the base cover the 68° range of the traveling wheels of the shield machine frame, ensuring the stability of the shield machine and the shield machine frame during the passing-station of the shield machine.

[0036] In this embodiment, a reserved groove is formed in the arc-shaped supporting surface 10. Anchor fittings are arranged in the reserved groove. The anchor fittings are connected to the arc-shaped segment 21.

[0037] A caulking plate is provided between two adjacent wedge-shaped segments. The connecting bolts of two adjacent wedge-shaped segments penetrate through the caulking plate, and the anchor fittings are connected to the caulking plate.

[0038] A steel bar coupler is embedded at the bottom of the reserved groove. The steel bar coupler is connected to the anchor by a connecting steel bar.

[0039] Refer to Figure 2 As shown, in this embodiment, the pedestal in the working shaft is cast in one piece along the full length in the direction of the shield machine's advancement, and two reserved grooves are longitudinally reserved. Horizontal and vertical steel bar couplers are reserved in the grooves of the reserved grooves at φ18@500 for personnel to walk and segment fixing during the station passing period. The grooves are roughened to facilitate concrete consolidation.

[0040] The starting reaction frame 3 is post-cast at the other end of the translation reaction frame 2. The starting reaction frame 3 is used to support the shield tail.

[0041] The translation reaction frame is composed of precast segments. One end of the translation reaction frame is connected to the receiving ring and is installed until the shield machine advances to the position before being in place at the starting portal.

[0042] When the shield machine advances to the starting portal during the station passing, the starting reaction frame (cast-in-place structure) is cast at the tail of the starting shield machine.

[0043] The translation reaction frame uses B1 - B3 and B5 - B7 in the conventional 40mm wedge-shaped segments as the force-bearing structure for the station passing advancement. It not only compensates for the 33mm wedge amount but also can provide a total thrust of about 60000KN, as Figure 4 shown.

[0044] To ensure the stability of the segments, anchor fittings (such as 42# anchor bolts) are installed at the reserved grooves corresponding to the pedestal. At the pedestal, the anchor bolts are welded to the φ18 steel bars connected to the steel bar couplers. A caulking plate (such as a thin steel plate) is stuffed in the gap between the segments. The caulking plates are welded between the segments to improve the integrity.

[0045] The starting position reaction frame is a cast-in-place concrete structure. Its bottom is connected to the translation reaction frame, and the rest is a cast-in-place reaction frame. The translation reaction frame needs to be strengthened and connected to the starting position reaction frame through steel bars and anchor bolts. The steel bars of the cast-in-place structure at other positions are designed according to the requirement of a total thrust of 70000KN.

[0046] The present invention provides an efficient propulsion and station passing method for an extra-large diameter slurry shield, which is implemented by using the above-mentioned efficient propulsion and station passing device for an extra-large diameter slurry shield. Specifically, it includes the following steps:

[0047] S1. A pedestal 1 is arranged in the working shaft 4, so that the pedestal 1 is arranged between the starting portal a and the receiving portal b of the working shaft 4. An arc-shaped supporting surface 10 is formed on the pedestal 1. The radian of the arc-shaped supporting surface 10 is adapted to the radian of the outer wall of the passing shield machine. The inner arc surface of the arc-shaped supporting surface 10 is arranged upward, and guide rails 11 are respectively arranged on the opposite two sides in the arc-forming direction of the arc-shaped supporting surface 10.

[0048] S2. Push the passing shield machine out through the receiving opening b so that the passing shield machine is placed on the arc-shaped supporting surface 10, and the guide rail 11 is embedded in the outer edge notch of the cutter head of the passing shield machine.

[0049] S3. Between the shield tail of the passing shield machine and the receiving ring 41 in the receiving opening b, lay multiple arc-shaped segments 21 on the arc-shaped supporting surface 10 to form a translation reaction frame 2 that supports the lower side of the shield tail of the passing shield machine, so that the passing shield machine advances through the station by means of the reaction force of the translation reaction frame 2.

[0050] When laying multiple arc-shaped segments 21 on the arc-shaped supporting surface 10, this step includes:

[0051] S31. When laying each arc-shaped segment 21, place three wedge-shaped segments on the arc-shaped supporting surface 10.

[0052] S32. Insert a caulking board into the joint between two adjacent wedge-shaped segments.

[0053] S33. Install connecting bolts between two adjacent wedge-shaped segments, and pass the connecting bolts through the caulking board.

[0054] S34. Connect the caulking board to the anchor.

[0055] S4. Before the passing shield machine enters the launching opening a, pour and form a launching reaction frame 3 at the other end of the translation reaction frame 2 to support the shield tail, so that the passing shield machine advances into the launching opening a by means of the reaction force of the launching reaction frame 3.

[0056] The high-efficiency propulsion through-station device for an extra-large diameter slurry shield of the present invention constructs a base between the receiving opening and the launching opening of the working shaft to carry the shield machine. During the propulsion through-station of the shield machine, first lay a translation reaction frame on the base, and then pour a launching reaction frame to make the shield machine enter the launching opening, greatly reducing the later cutting and chiseling workload and improving the construction efficiency. On the other hand, the high-efficiency propulsion through-station device for an extra-large diameter slurry shield of the present invention has small requirements for equipment and personnel.

[0057] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An efficient propulsion device for passing through stations of super-large diameter slurry shield, characterized in that include: A base is arranged in the working shaft, the base is arranged between the starting hole and the receiving hole of the working shaft, an arc-shaped support surface for supporting the station-passing shield machine is formed on the base, the curvature of the arc-shaped support surface is adapted to the curvature of the outer wall of the station-passing shield machine, the inner arc surface of the arc-shaped support surface is arranged upward, and guide rails for being embedded in the outer edge notch of the cutter head of the station-passing shield machine are respectively arranged on opposite sides of the arc-forming direction of the arc-shaped support surface; A translation reaction frame for supporting the lower side of the shield tail, comprising a plurality of arcuate segments laid on the arcuate support surface and arranged coaxially with the station-passing shield machine, wherein the plurality of arcuate segments are arranged along the length direction of the arcuate support surface, and one end of the translation reaction frame is supported on a receiving ring in the receiving hole; An initial reaction frame for supporting the shield tail is formed at the other end of the translation reaction frame by post-casting.

2. The high-efficiency propulsion and passing-through station device for an extra-large diameter slurry shield according to claim 1, wherein The central angle of the arc-shaped supporting surface is greater than 68°.

3. The efficient propulsion and passing-through station device for an extra-large diameter slurry shield according to claim 1, characterized in that, The arc-shaped supporting surface is formed with a reserved groove, in which an anchor is arranged, and the anchor is connected to the arc-shaped pipe segment.

4. The high-efficiency propulsion and passing-through station device for super-large diameter slurry shield according to claim 3, wherein, The arc-shaped segment includes three wedge-shaped segments.

5. The high-efficiency propulsion and passing-through station device for an extra-large diameter slurry shield according to claim 4, characterized in that, The three wedge-shaped segments are B1 to B3, or B5 to B7.

6. The high-efficiency propulsion and passing-through station device for an extra-large diameter slurry shield according to claim 4, wherein, A caulking plate is provided between two adjacent wedge-shaped segments, the connecting bolts of the two adjacent wedge-shaped segments penetrate the caulking plate, and the anchor is connected to the caulking plate.

7. The efficient propulsion and passing-through station device for an extra-large diameter slurry shield according to claim 6, wherein A steel bar connector is pre-buried at the bottom of the reserved groove, and the steel bar connector is connected to the anchor piece through connecting steel bars.

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