Steel double-socket integral type adapter ring for top shield construction

Abstract

The utility model discloses a steel double-socket integral type adapter ring for top shield construction, which comprises a cylinder, the wall thickness of a top pipe joint is larger than the wall thickness of a shield segment by X millimeters, and the outer diameter of the middle front part of the cylinder is smaller than the outer diameter of the middle rear part of the cylinder by X millimeters, so that the generatrix of the cylinder is in a broken line shape; a front inner ring and a rear inner ring are arranged in the middle of the inner wall of the cylinder at intervals front and back, the front inner ring and the inner wall of the cylinder in front of the front inner ring define a shield socket structure, and the rear inner ring and the inner wall of the cylinder behind the rear inner ring define a pipe jacking socket structure; a front water stop rubber ring is arranged between the shield socket structure and the shield segment, and a rear water stop rubber ring is arranged between the jacking pipe socket structure and the jacking pipe joint. The generatrix of the cylinder is in a broken line shape matched with the wall thickness difference between the pipe jacking section and the shield segment, the inner diameter of the pipe jacking section and the inner diameter of the shield segment are naturally aligned, and the phenomenon of slab staggering is avoided. A sealing contact surface is changed into a broken line shape, and the double-sided sealing structure enlarges the area of a sealing matching surface, so that the waterproof performance is obviously improved compared with the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of shield tunneling method construction, in particular to an adapter ring at the connection between a pipe jacking and a shield tunneling. Background Technique

[0002] The shield tunneling method is a new construction method applicable to the construction of long-distance non-excavated underground pipelines in cities. In the initial short-distance straight section of this construction method, the pipe jacking construction is carried out by the slurry balance method. When the construction parameters of the pipe jacking reach the extreme values, the shield equipment behind the pipe jacking machine is started, and the shield tunneling method is used to construct the remaining long-distance and curved sections, and the segment installation is pushed until the penetration is completed.

[0003] The shield tunneling method can complete the underground free conversion between the pipe jacking and the shield tunneling without setting up a transfer shaft, has a low impact on the traffic environment and structures above the pipeline, and is applicable to the construction of underground non-excavated pipelines in clay, sand and gravel layers.

[0004] Since the bearing capacities of the pipe jacking pipe sections and the shield segments are usually different, in actual construction, there will be a situation where the inner diameters of the pipe jacking pipe sections and the shield segments are the same but the wall thicknesses are different. In order to ensure the effective transition between the pipe jacking and the shield tunneling, they are usually connected in the form of an adapter ring.

[0005] The current conventional adapter ring adopts the form of a single socket structure plus a rubber water stop when connecting with the pipe jacking pipe section; when docking with the shield segment through the adapter ring, the docking contact surface adopts a flat docking and bolt connection, and a rubber water stop is added to the docking surface.

[0006] The contact area of the flat docking (plane contact seal) method is small, and the water seepage path formed on the docking surface is straight, so the requirement for waterproof performance is very high.

[0007] The above docking structure and docking process cannot ensure the tightness of the docking surface between the pipe jacking pipe section and the shield segment. If the water stop effect is not good, phenomena such as water seepage and grout leakage are likely to occur along the interface between the two, and this process usually can only ensure that the outer diameters of the pipe jacking and the shield tunneling are the same, but there is a misalignment phenomenon in the inner diameter.

[0008] In the subsequent long-term use process, the connection ring and its inner docking surface become weak links. Affected by groundwater, rusting is very likely to occur, affecting the normal service life of the adapter ring and the connection bolts.

[0009] The improvement idea of the utility model is:

[0010] 1. Design the busbar of the adapter ring as a broken line to match the wall thickness difference between the pipe jacking pipe section and the shield segment, ensuring that there is no misalignment in the inner diameters of the pipe jacking pipe section and the shield segment. Change the structure where the pipe jacking pipe section and the shield segment are directly butt - sealed in the adapter ring to a structure where the pipe jacking pipe section and the shield segment respectively form a broken - line water seepage path with the structure of the docking ring. Compared with the straight water seepage path formed by the previous docking surface, under the same other conditions, it enhances the water seepage resistance, expands the contact area, and improves the waterproof performance.

[0011] 2. Set multiple transition rib plates in the middle and front part of the adapter ring, which not only enhances the structural strength but also realizes the smooth transition of the outer diameters of the pipe jacking pipe section and the shield segment.

[0012] 3. Set intermediate rib plates for transmitting axial force and enhancing structural strength. Summary of the Utility Model

[0013] The purpose of the present utility model is to provide an adapter ring for steel double - socket integral pipe jacking and shield construction. The busbar of the adapter ring is designed as a broken line that matches the wall thickness difference between the pipe jacking pipe section and the shield segment. The plane contact seal is changed to a double - sided contact seal between the two and the water seepage path formed by the contact surface of the double - sided contact seal is in a broken - line shape.

[0014] To achieve the above - mentioned purpose, the adapter ring for steel double - socket integral pipe jacking and shield construction of the present utility model includes a steel cylinder. The wall thickness of the pipe jacking pipe section is X millimeters greater than that of the shield segment. The outer diameter of the middle and front part of the cylinder is X millimeters smaller than the outer diameter of the middle and rear part of the cylinder, so that the busbar of the cylinder is in a broken - line shape that matches the wall thickness difference between the pipe jacking pipe section and the shield segment.

[0015] Anterior inner ring and posterior inner ring are arranged at intervals before and after in the middle of the inner wall of the cylinder. The anterior inner ring and the inner wall of the cylinder in front of it enclose a shield socket structure for inserting the shield segment, and the posterior inner ring and the inner wall of the cylinder behind it enclose a pipe jacking socket structure for inserting the pipe jacking pipe section.

[0016] Several front water - stop rubber rings are arranged at intervals between the shield socket structure and the shield segment, and several rear water - stop rubber rings are arranged at intervals between the pipe jacking socket structure and the pipe jacking pipe section.

[0017] A plurality of transition rib plates are evenly arranged along the circumferential direction on the circumferential outer surface of the shield socket structure. (In this embodiment, the central angle between two transition rib plates is preferably 15 degrees). The radial outer surface of the rear end of the transition rib plate is flush with the circumferential outer surface of the shield socket structure, and the outer diameter of the front end of the transition rib plate is smaller than that of its rear end.

[0018] The anterior inner ring and the posterior inner ring are connected with a plurality of intermediate rib plates. The intermediate rib plates are used for transmitting axial force in the axial direction and enhancing the structural strength; the radial outer ends of each intermediate rib plate are all connected to the inner wall of the cylinder; each intermediate rib plate is evenly distributed along the circumference.

[0019] On the rear end face of the shield segment inserted into the shield socket structure, there are arc-shaped bolt holes, which extend forward and inwards to the inner surface of the shield segment. An operation groove is provided on the inner surface of the shield segment at the position of the arc-shaped bolt holes.

[0020] Corresponding to the arc-shaped bolt holes on the front inner ring, there are through holes. Arc-shaped bolts are arranged in the through holes and the arc-shaped bolt holes. The front end of the arc-shaped bolt extends into the operation groove and is connected with a front nut, and the rear end of the arc-shaped bolt extends backward out of the front inner ring and is connected with a rear nut.

[0021] The utility model has the following advantages:

[0022] In the utility model, the generatrix of the cylinder is in a polyline shape that matches the wall thickness difference between the jacking pipe section and the shield segment. After the jacking pipe section and the shield segment are respectively inserted into the shield socket structure and the jacking pipe socket structure, the inner diameters of the jacking pipe section and the shield segment are naturally aligned, and no offset phenomenon will occur. In the utility model, the circumferential side wall of the shield segment and the inner wall of the cylinder form an annular sealing surface, and the rear end face of the shield segment is tightly pressed and sealed with the front inner ring. Therefore, the sealing contact surface (which is also the water seepage path) changes from the previous straight shape to a polyline shape. The waterproof performance of the polyline-shaped sealing structure is naturally higher than that of the straight-shaped sealing structure, and the double-sided sealing structure of the utility model also expands the area of the sealing mating surface. Therefore, the waterproof performance of the utility model is significantly improved compared with the past.

[0023] The outer diameter of the front end of the transition rib plate is smaller than the outer diameter of its rear end, and the outer surface of the rear end diameter of the transition rib plate is flush with the circumferential outer surface of the shield socket structure, so that not only the structural strength of the utility model can be enhanced, but also the smooth transition of the outer diameters of the jacking pipe section and the shield segment can be realized.

[0024] The middle rib plate can transmit the axial force between the front inner ring and the rear inner ring, so that the constructed jacking pipe structure can be used as a backrest to support the shield construction forward.

[0025] Through the arc-shaped bolt, the front nut and the rear nut, a tightly pressed sealing fit can be conveniently formed between the shield segment and the front inner ring. Brief Description of the Drawings

[0026] Figure 1 is a structural schematic diagram of the utility model. Figure 1 The downward direction in it is the forward direction of the shield construction.

[0027] Figure 2 is Figure 1 the bottom view of

[0028] Figure 3 is Figure 2 the B-B vertical sectional view of

[0029] Figure 4It is a three-dimensional structural schematic diagram of the present utility model.

[0030] Figure 5 It is a structural schematic diagram of the connection between the present utility model and the pipe jacking pipe section and the shield segment. Specific embodiments

[0031] In the present utility model, the forward direction is the direction of the shield tunneling construction progress, and the reverse direction is the backward direction.

[0032] As Figures 1 to 5 shown, the steel double socket integral transfer ring for shield tunneling construction of the present utility model includes a steel cylinder. The wall thickness of the pipe jacking pipe section 1 is greater than the wall thickness of the shield segment 2 by X millimeters, where X is a positive real number. The outer diameter of the middle and front part of the cylinder is less than the outer diameter of the middle and rear part of the cylinder by X millimeters, so that the generatrix of the cylinder is in a zigzag shape that matches the wall thickness difference between the pipe jacking pipe section 1 and the shield segment 2.

[0033] The front inner ring 5 and the rear inner ring 6 are arranged at intervals before and after in the middle of the inner wall of the cylinder. The front inner ring 5 and the inner wall of the cylinder in front of it enclose the shield socket structure 3 and are used for inserting the shield segment 2. The rear inner ring 6 and the inner wall of the cylinder behind it enclose the pipe jacking socket structure 4 and are used for inserting the pipe jacking pipe section 1.

[0034] A number of front water stop rubber rings 7 are pressed at intervals between the shield socket structure 3 and the shield segment 2, and a number of rear water stop rubber rings 8 are arranged at intervals between the pipe jacking socket structure 4 and the pipe jacking pipe section 1. The front water stop rubber rings 7 and the rear water stop rubber rings 8 are used to enhance the waterproof performance and prevent the structure from rusting due to water during long-term use.

[0035] In the present utility model, the generatrix of the cylinder is in a zigzag shape that matches the wall thickness difference between the pipe jacking pipe section 1 and the shield segment 2. After the pipe jacking pipe section 1 and the shield segment 2 are respectively inserted into the shield socket structure 3 and the pipe jacking socket structure 4, the inner diameters of the pipe jacking pipe section 1 and the shield segment 2 are naturally aligned, and no offset phenomenon will occur. In the present utility model, the circumferential side wall of the shield segment 2 and the inner wall of the cylinder form an annular sealing surface, and the rear end face of the shield segment 2 is tightly pressed and sealed with the front inner ring 5. Therefore, the sealing contact surface (which is also the water seepage path) changes from the previous straight shape to a zigzag shape. The waterproof performance of the zigzag sealing structure is naturally higher than that of the straight sealing structure, and the double-sided sealing structure of the present utility model also expands the area of the sealing mating surface. Therefore, the waterproof performance of the present utility model is significantly improved compared with the past.

[0036] A plurality of transition rib plates 9 are uniformly arranged on the circumferential outer surface of the shield socket structure 3 in the circumferential direction. (In this embodiment, the central angle between two transition rib plates 9 is preferably 15 degrees). The outer surface of the rear end of the transition rib plate 9 is flush with the circumferential outer surface of the shield socket structure 3, and the outer diameter of the front end of the transition rib plate 9 is smaller than the outer diameter of its rear end.

[0037] The outer diameter of the front end of the transition rib plate 9 is smaller than that of the rear end, and the outer surface of the radial direction of the rear end of the transition rib plate 9 is flush with the circumferential outer surface of the shield socket structure 3, so that not only the structural strength of the present invention can be enhanced, but also the smooth transition of the outer diameters of the jacking pipe section 1 and the shield segment 2 can be realized.

[0038] A plurality of intermediate rib plates 10 are connected between the front inner ring 5 and the rear inner ring 6. The intermediate rib plates 10 are used to transmit axial force in the axial direction and enhance the structural strength; the outer radial ends of the intermediate rib plates 10 are all connected to the inner wall of the cylinder; the intermediate rib plates 10 are evenly distributed along the circumferential direction. The central angle between adjacent intermediate rib plates 10 is preferably 18 degrees.

[0039] The intermediate rib plate 10 can transmit axial force between the front inner ring 5 and the rear inner ring 6, so that the constructed jacking pipe structure can be used as a backrest to support the shield construction forward.

[0040] An arc-shaped bolt hole is provided on the rear end face of the shield segment 2 inserted into the shield socket structure 3. The arc-shaped bolt hole extends forward and inward to the inner surface of the shield segment 2. An operation groove 11 is provided on the inner surface of the shield segment 2 at the arc-shaped bolt hole; the arc-shaped bolt hole and the arc-shaped bolt 12 occupy the same position in space, and no additional reference numeral is given to the hole of the arc-shaped bolt 12.

[0041] A through hole 13 is provided on the front inner ring 5 corresponding to the hole of the arc-shaped bolt 12. An arc-shaped bolt 12 is provided in the through hole 13 and the hole of the arc-shaped bolt 12. The front end of the arc-shaped bolt 12 extends into the operation groove 11 and is connected with a front nut 14, and the rear end of the arc-shaped bolt 12 extends backward out of the front inner ring 5 and is connected with a rear nut 15.

[0042] The arc-shaped bolt 12, the front nut 14 and the rear nut 15 can conveniently form a tightly pressed sealing fit between the shield segment 2 and the front inner ring 5.

[0043] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be modified or equivalently replaced, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. A steel double-socket integral top shield construction adapter ring, comprising a steel cylinder, the wall thickness of the top pipe section is greater than the wall thickness of the shield segment by X mm, characterized in that: The outer diameter of the front part of the cylinder is smaller than the outer diameter of the rear part of the cylinder by X mm, where X is a positive real number, so that the generatrix of the cylinder is in the shape of a broken line that matches the wall thickness difference between the top pipe segment and the shield segment. A front inner ring and a rear inner ring are provided at intervals in the middle of the inner wall of the cylinder. The front inner ring and the inner wall of the cylinder in front of it form a shield socket structure for inserting shield segments, and the rear inner ring and the inner wall of the cylinder behind it form a jacking pipe socket structure for inserting jacking pipe sections. A plurality of front water-stopping rubber rings are arranged between the shield socket structure and the shield segments, and a plurality of rear water-stopping rubber rings are arranged between the jacking pipe socket structure and the jacking pipe sections.

2. The steel double-socket integral top shield construction adapter ring according to claim 1 is characterized by: A plurality of transition ribs are evenly arranged on the circumferential outer surface of the shield socket structure in the circumferential direction, the rear end radial outer surface of the transition rib is flush with the circumferential outer surface of the shield socket structure, and the front end outer diameter of the transition rib is smaller than the rear end outer diameter.

3. The steel double-socket integral top shield construction adapter ring according to claim 1 is characterized by: The front inner ring and the rear inner ring are connected with a plurality of intermediate ribs, which are used to transmit axial force in the axial direction and enhance the structural strength; the radial outer end of each intermediate rib is connected to the inner wall of the cylinder; and the intermediate ribs are evenly distributed along the circumferential direction.

4. The steel double-socket integral top shield construction adapter ring according to claim 1 is characterized by: An arc-shaped bolt hole is provided on the rear end surface of the shield segment inserted into the shield socket structure, and the arc-shaped bolt hole extends forward and inward to the inner surface of the shield segment, and an operating groove is provided on the inner surface of the shield segment at the arc-shaped bolt hole; A through hole is provided on the front inner ring corresponding to the arc-shaped bolt hole, and an arc-shaped bolt is provided in the through hole and the arc-shaped bolt hole. The front end of the arc-shaped bolt extends into the working groove and is connected with a front nut, and the rear end of the arc-shaped bolt extends backward from the front inner ring and is connected with a rear nut.

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