Supporting structure and shield double-layer lining tunnel

Abstract

The application provides a supporting structure and a shield double-layer lining tunnel, and relates to the technical field of shield tunnel construction. The supporting structure comprises an anchoring support and at least one supporting arch. The supporting arch is arc-shaped, and the outer wall is configured to be attached to the inner wall of the segment block. When a plurality of supporting arches are provided, the adjacent two supporting arches are fixedly connected, and the plurality of supporting arches are enclosed in an arc shape. One end of the anchoring support is connected with the supporting arch, and the other end is used for extending into and being fixed in the inside of the segment block. The supporting structure provided by the application solves the technical problems of insufficient supporting force and construction safety hazards of the shield double-layer lining tunnel during construction in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield tunnel construction, in particular to a supporting structure and a shield double lining tunnel. BACKGROUND

[0002] With the rapid development of shield tunnel engineering construction in China, a large number of high water head, long distance, clay condition shield tunnel projects across rivers and seas are being planned or constructed. However, the shield tunnel will inevitably bear extremely high water and soil pressure during the construction process. In order to ensure the safety of the shield tunnel, a large number of shield double lining structure tunnels are being built. The first lining of the shield double lining tunnel is the traditional segment lining, which is assembled into a ring by a plurality of segment blocks; the second lining is the annular concrete lining cast in situ, which can also be called the inner lining. However, the shield double lining tunnel has an important problem, that is, although it is a double lining, the outer shield segment still needs to be constructed and assembled first during the construction process, and then the concrete inner lining is cast in situ at the area where the shield machine exits the shield tail. Due to the large size of the shield machine and the necessity of installing the shield machine running track at the inverted arch, there is not enough space to carry out the construction of the concrete inner lining in the area of the shield machine length, resulting in that the segment cannot provide additional support for a long time, so the segment becomes the biggest risk point during the construction period. This results in the problem that the shield double lining scheme can provide support during the operation period, but there is a lack of support and construction safety risks during the construction period. SUMMARY

[0003] The purpose of the present application is to provide a supporting structure and a shield double lining tunnel to alleviate the technical problems of insufficient support and construction safety risks during the construction period of the shield double lining tunnel in the prior art.

[0004] In order to solve the above technical problems, the technical scheme provided by the present application is as follows:

[0005] In a first aspect, the supporting structure provided by the present application comprises an anchoring support and at least one support arch;

[0006] The support arch is arc-shaped, and the outer wall is configured to fit the inner wall of the segment. When a plurality of support arches are provided, the end portions of adjacent two support arches are fixedly connected, and the plurality of support arches are enclosed in an arc shape.

[0007] One end of the anchoring support is connected with the support arch, and the other end is used to extend into and be fixed in the interior of the segment.

[0008] Further,

[0009] The support arch comprises a steel arch, and the steel arch is arc-shaped.

[0010] The outer wall of the steel arch is connected with the anchoring support and is configured to be attached to the inner wall of the segment.

[0011] Further,

[0012] The steel arch comprises a connecting plate, a first supporting plate and a second supporting plate, the first and second supporting plates are respectively connected with two sides of the connecting plate and are arranged at an angle with the connecting plate.

[0013] The side of the first supporting plate away from the connecting plate is connected with the anchoring support and is configured to be attached to the inner wall of the segment.

[0014] Further,

[0015] The supporting arch further comprises a steel plate with an opening, the steel plate is arc-shaped and covers the steel arch.

[0016] Further,

[0017] The supporting arch further comprises a plurality of rib plates, the plurality of rib plates are arranged at intervals along the circumference of the steel plate, and one side of the rib plate is connected with the inner wall of the steel plate.

[0018] Further,

[0019] The supporting arch further comprises a first filling piece, the first filling piece is filled between the steel plate and the steel arch.

[0020] Further,

[0021] The anchoring support comprises an anchoring head, the anchoring head is used to extend into and be fixed in the interior of the segment.

[0022] In the second aspect, the application provides a shield double-layer lining tunnel comprising a segment block and the supporting structure as described in any one of the above.

[0023] The segment block is a component of the first layer lining of the shield double-layer lining tunnel, a plurality of segment blocks are assembled into a ring shape, the outer wall of the supporting arch of the supporting structure is attached to the inner wall of the segment block, and one end of the anchoring support of the supporting structure away from the steel arch extends into and is fixed in the interior of the segment block.

[0024] Further,

[0025] The inner wall of the segment block has a hand hole, and one end of the anchoring support extends into and is fixed in the hand hole.

[0026] Further,

[0027] The hand hole and the anchoring support are filled with a second filling piece.

[0028] In combination with the above technical solutions, the technical effects that can be achieved by the present application are analyzed as follows:

[0029] The support structure provided by the present application comprises an anchoring support and at least one support arch; the support arch is arc-shaped, and the outer wall is configured to be attached to the inner wall of the segment block; when a plurality of support arches are provided, the end portions of two adjacent support arches are fixedly connected, and the plurality of support arches are enclosed in an arc shape; one end of the anchoring support is connected to the support arch, and the other end is used to extend into and be fixed in the interior of the segment block. During the construction of the shield double lining tunnel, after the segment block is assembled, one end of the anchoring support is fixed on the support arch, and the other end is extended into and fixed in the interior of the segment block, so that the outer wall of the support arch is attached to the inner wall of the segment block, and the support arch provides support to the segment block; because the support arch or the plurality of support arches are enclosed in an arc shape, the shield machine running track can be installed on the portion where no support arch is provided, thereby avoiding the influence of the support structure on the laying of the shield machine running track, and avoiding the problem that there is no support force in the length region of the shield machine during the construction of the shield double lining tunnel, thereby improving the safety of the construction. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0031] Figure 1 The structure schematic diagram of the shield double lining tunnel provided by the embodiment of the present application is shown in the figure;

[0032] Figure 2 The local structure schematic diagram of the shield double lining tunnel provided by the embodiment of the present application is shown in the figure;

[0033] Figure 3 The structure schematic diagram of the shield double lining tunnel provided by the embodiment of the present application is shown in the figure; Figure 1 The cross-sectional view of A in the figure;

[0034] Figure 4 The cross-sectional view of B in the figure. Figure 1

[0035] Figure legend:

[0036] 100-anchoring support; 110-anchoring head; 200-support arch; 210-steel arch; 211-connection plate; 212-first support plate; 213-second support plate; 220-steel plate; 230-rib plate; 240-first filling piece; 300-segment block; 310-hand hole; 320-second filling piece. DETAILED DESCRIPTION​

[0037] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0039] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0041] In addition, the terms "horizontal", "vertical", "overhang" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0042] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] Some embodiments of the present application will be described in detail with reference to the drawings. The following examples and features in the examples can be combined with each other in the case of no conflict.

[0044] With the rapid development of shield tunnel construction in China, a large number of high water head, long distance, clay under shield tunnel engineering are being planned or constructed. However, the shield tunnel will inevitably bear extremely high water and soil pressure during construction. In order to ensure the safety of the shield tunnel, a large number of shield double lining structures are built. There is a problem with the double lining shield tunnel, that is, although it is double lining, the outer shield segment block needs to be assembled first during construction, and then the concrete lining is applied in the area where the shield tail is removed. Due to the large size of the shield machine and the necessity of installing the shield machine running track in the inverted arch, there is not enough space to carry out the construction of the concrete lining in the length area of the shield machine, which leads to the fact that the additional support force cannot be provided in this section for a long time, so this section becomes the biggest risk point during construction. This results in the problem that the shield double lining scheme can provide support during operation, but the support force is insufficient and the construction risk exists during construction.

[0045] Therefore, referring to Figure 1 , the support structure provided by the embodiment of the present application comprises an anchoring support 100 and at least one support arch 200. The support arch 200 is arc-shaped, and the outer wall is configured to be attached to the inner wall of the segment block 300. When multiple support arches 200 are provided, the end portions of adjacent two support arches 200 are fixedly connected, and the multiple support arches 200 are enclosed in an arc shape. One end of the anchoring support 100 is connected with the support arch 200, and the other end is used to extend into and be fixed in the inside of the segment block 300. During the construction of the shield double lining tunnel, after the segment block 300 is assembled, one end of the anchoring support 100 is fixed on the support arch 200, and the other end is extended into and fixed in the inside of the segment block 300, so as to realize the attachment of the outer wall of the support arch 200 to the inner wall of the segment block 300, and to enable the support arch 200 to provide support force to the segment block 300. Because the support arch 200 or the multiple support arches 200 are enclosed in an arc shape, the shield machine running track can be installed in the part where no support arch 200 is provided, so as to avoid the influence of the support structure on the laying of the shield machine running track, and to avoid the problem that there is no support force in the length area of the shield machine during the construction of the shield double lining tunnel, thereby improving the safety of the construction.

[0046] The shape and structure of the support structure will be described in detail as follows:

[0047] In the optional scheme provided by the embodiment of the present application, the support arch 200 comprises a steel arch 210, the steel arch 210 is arc-shaped, the outer wall of the steel arch 210 is connected with the anchoring support 100, and is configured to be attached to the inner wall of the segment block 300.

[0048] Specifically, in the embodiment, a plurality of steel arches 210 are provided, and the end portions of two adjacent steel arches 210 are welded; the number of anchor supports 100 is equal to the number of steel arches 210, and the plurality of anchor supports 100 are connected to the plurality of steel arches 210 one by one. Of course, each steel arch 210 is matched with a plurality of anchor supports 100, for example, two, three or four, which should also be within the protection scope of the embodiment of the application.

[0049] The support arch 200 comprises the steel arch 210, and the steel arch 210 has the characteristics of light self-weight, simple construction and high strength, so that the support arch 200 also has the same characteristics as the steel arch 210, and is suitable for supporting the pipe segment block 300.

[0050] In the optional scheme provided by the embodiment of the application, the steel arch 210 comprises a connecting plate 211, a first supporting plate 212 and a second supporting plate 213, the first supporting plate 212 and the second supporting plate 213 are respectively connected to the two sides of the connecting plate 211 and are arranged at an angle with the connecting plate 211; the side of the first supporting plate 212 away from the connecting plate 211 is connected to the anchor support 100 and is configured to be attached to the inner wall of the pipe segment block 300.

[0051] Specifically, in the embodiment, referring to Figure 1 and Figure 2 , the steel arch 210 is provided as an H-shaped steel arch, and the cross section is provided as an H shape, that is, the two ends of the connecting plate 211 are respectively connected to the middle portions of the first supporting plate 212 and the second supporting plate 213. The H-shaped steel arch has high plasticity, flexibility and structural stability, and is suitable for bearing a building structure with large vibration and impact load.

[0052] The steel arch 210 is provided as an H-shaped steel arch, which improves the plasticity, flexibility and structural stability of the steel arch 210, so that the steel arch 210 is suitable for supporting the pipe segment block 300.

[0053] In the optional scheme provided by the embodiment of the application, the support arch 200 further comprises a steel plate 220 with an opening, and the steel plate 220 is arc-shaped and covers the steel arch 210.

[0054] Specifically, in the embodiment, referring to Figure 1 and Figure 2 , the steel plate 220 is provided as a U-shaped steel plate groove, and the number of the U-shaped steel plate grooves is equal to the number of the steel arches, and the plurality of U-shaped steel plate grooves cover the plurality of steel arches 210 one by one. More preferably, the two adjacent U-shaped steel plate grooves are welded.

[0055] The U-shaped steel plate groove covers the H-shaped steel arch, which strengthens the strength of the support arch 200 and improves the supporting force on the pipe segment block 300.

[0056] In the optional solution provided by the embodiment of the present application, please refer to Figures 2 to 4 The support arch 200 further comprises a plurality of rib plates 230, which are arranged along the circumference of the steel plate 220 and connected to the inner wall of the steel plate 220.

[0057] Specifically, in the embodiment, the section of the opening of the U-shaped steel plate groove is square, and three rib plates 230 are connected to each side wall and arranged in parallel along the width direction of the side wall.

[0058] The rib plates 230 arranged on the inner wall of the U-shaped steel plate groove improve the strength of the U-shaped steel plate groove, and further improve the strength of the steel arch and the supporting effect on the segment block 300.

[0059] In the optional solution provided by the embodiment of the present application, the support arch 200 further comprises a first filling member 240, which is filled between the steel plate 220 and the steel arch 210.

[0060] Specifically, in the embodiment, the first filling member 240 is set as early strength concrete, which is pumped from the opening at the lower end of the U-shaped steel plate groove to fill the internal space of the U-shaped steel plate groove. Of course, the first filling member 240 set as concrete should also be within the protection scope of the embodiment of the present application.

[0061] The early strength concrete is made of limestone, slag and gypsum, which has a rapid early strength rise and shortens the construction time. The early strength concrete or concrete filled between the steel plate 220 and the steel arch 210 further improves the strength of the steel arch.

[0062] In the optional solution provided by the embodiment of the present application, the anchoring support 100 comprises an anchoring head 110, which is used to extend into and be fixed in the interior of the segment block 300.

[0063] Specifically, please refer to Figure 4 The section of the anchoring head 110 is set as an ellipse.

[0064] The anchoring head 110 extends into and is fixed in the interior of the segment block 300, realizing the connection between the anchoring support 100 and the segment block 300, and further realizing the connection between the steel arch and the segment block 300.

[0065] The construction method of the supporting structure is described in detail as follows:

[0066] After the segment block 300 is assembled, one end of the anchor support 100 is fixed to a single H-shaped steel arch, the H-shaped steel arch is tightly attached to the inner wall of the segment block 300, and the other end of the anchor support 100 is inserted into the segment block 300 and fixed inside the segment block 300 by the anchor head 110.

[0067] Use concrete to fill the inner wall of segment block 300;

[0068] Install each H-shaped steel arch frame on the inner wall of the segment block 300 according to the above steps, while avoiding the travel path range of the shield tunneling machine.

[0069] Weld the ends of two adjacent H-shaped steel arches;

[0070] A U-shaped steel plate groove is installed on each H-shaped steel arch, and the ends of two adjacent U-shaped steel plate grooves are welded together.

[0071] Early-strength concrete is pumped into the opening at the bottom of the U-shaped steel plate channel, filling the internal space of the U-shaped steel plate channel with early-strength concrete.

[0072] Example 2

[0073] The shield tunnel with double-layer lining provided by the present invention includes the support structure described in Embodiment 1, and therefore also possesses all the beneficial effects of Embodiment 1, which will not be repeated here.

[0074] In the optional solution provided by the embodiments of the present invention, the shield double-layer lining tunnel includes segment blocks 300. The segment blocks 300 are the first layer lining components of the shield double-layer lining. Multiple segment blocks 300 are assembled into a ring. The outer wall of the support arch frame 200 of the support structure is attached to the inner wall of the segment block 300. The anchor support 100 of the support structure extends into and is fixed inside the segment block 300 at one end away from the steel arch frame.

[0075] Specifically, the inner wall of the segment block 300 has a hand hole 310, and the anchor head 110 of the anchor support 100 extends into the hand hole 310 and is fixed in the hand hole 310.

[0076] The anchor head 110 of the anchor support 100 is fixed in the hand hole 310 of the segment block 300, so as to install the support arch 200 in the segment block 300.

[0077] In an optional embodiment of the present invention, a second filler 320 is provided between the handhole 310 and the anchor support 100.

[0078] Specifically, the second filler 320 is made of concrete, which fills the handhole 310 and makes the outer surface of the concrete flush with the inner wall of the segment block 300.

[0079] The second filling member 320 fills the hand hole 310, and strengthens the fixing effect on the anchoring head 110.

[0080] The construction process of the double-layer lining tunnel of the shield is described in detail as follows:

[0081] a. After the segment blocks 300 are assembled into a ring, the construction of the first layer lining is completed; then the second layer lining tunnel is constructed, first, the anchoring support 100 is fixed at one end on a single H-shaped steel arch;

[0082] b. The H-shaped steel arch is tightly attached to the inner side of the segment block 300, and the anchoring support 100 has one end of the anchoring head 110 extending into the hand hole 310 of the segment block 300, and the anchoring head 110 is fixed in the hand hole 310;

[0083] c. The hand hole 310 of the segment block 300 is filled with concrete to be full to be flush with the inner wall of the segment block 300;

[0084] d. Each H-shaped steel arch is installed on the inner side of the segment block 300 according to the steps of a-c, and the shield inverted arch shield machine driving path range is avoided;

[0085] e. The two adjacent H-shaped steel arches are welded and assembled together;

[0086] f. The U-shaped steel plate groove provided with the rib plate 230 is covered on the H-shaped steel arch, and the U-shaped steel plate grooves are welded and assembled together to be tightly attached to the inner side of the segment block 300;

[0087] g. Early strength concrete is pumped from the two openings at the lower end of the U-shaped steel plate groove to fill the internal space of the U-shaped steel plate groove;

[0088] h. The concrete lining is poured, and the temporary support is integrally poured in the concrete.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A support structure, characterized in that, The application relates to a supporting structure for a shield tunneling machine. The supporting structure comprises an anchoring support (100) and at least one supporting arch (200). The supporting arch (200) is arc-shaped, the track of the shield tunneling machine can be installed on a part without the supporting arch, and the outer wall is configured to be attached to the inner wall of a segment (300). One end of the anchoring support (100) is connected to the supporting arch (200), and the other end is used for extending into and being fixed in a hand hole in the inner wall of the segment (300). The supporting arch (200) comprises a profile steel arch (210), and the profile steel arch (210) is arc-shaped. The outer wall of the profile steel arch (210) is connected to the anchoring support (100) and is configured to be attached to the inner wall of the segment (300). The supporting arch (200) further comprises a steel plate (220) with an opening, the steel plate (220) is arc-shaped and covers the profile steel arch (210), and the steel plate is provided as a U-shaped steel plate slot. The profile steel arch (210) comprises a connecting plate (211), a first supporting plate (212) and a second supporting plate (213), the first supporting plate (212) and the second supporting plate (213) are respectively connected to the two sides of the connecting plate (211) and are both arranged at an angle with the connecting plate (211). The side of the first supporting plate (212) away from the connecting plate (211) is connected to the anchoring support (100) and is configured to be attached to the inner wall of the segment (300). The supporting arch (200) further comprises a plurality of rib plates (230), the plurality of rib plates (230) are arranged at intervals along the circumference of the steel plate (220), and one side of the rib plate (230) is connected to the inner wall of the steel plate (220). The supporting arch (200) further comprises a first filling piece (240) filled between the steel plate (220) and the profile steel arch (210).

2. The support structure of claim 1, wherein, The anchoring support (100) comprises an anchoring head (110) used for extending into and being fixed in the interior of the segment (300).

3. A shield double lined tunnel, characterized by, The application further relates to a segment (300) and the supporting structure as claimed in claim 1 or 2. The segment (300) is a first layer lining component of the shield double-layer lining, a plurality of the segments (300) are assembled into a ring shape, the outer wall of the supporting arch (200) of the supporting structure is attached to the inner wall of the segment (300), and one end of the anchoring support (100) of the supporting structure away from the supporting arch (200) extends into and is fixed in the interior of the segment (300).

4. The double lined tunnel according to claim 3, wherein, The inner wall of the segment (300) has a hand hole (310), and one end of the anchoring support (100) extends into and is fixed in the hand hole (310).

5. The double lined tunnel according to claim 4, wherein, A second filling piece (320) is filled between the hand hole (310) and the anchoring support (100).

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