Steel negative ring duct piece suitable for socket and spigot joint duct piece

Abstract

The invention relates to a steel negative ring duct piece suitable for a bell-and-spigot joint duct piece, a steel negative ring body is composed of a plurality of duct pieces, adjacent duct pieces are connected through a longitudinal seam bell-and-spigot joint, and adjacent duct pieces are connected through a circular seam bell-and-spigot joint. According to the invention, through optimization of the negative ring joint, precise transition of the existing negative ring in the current market can be realized; by means of high-precision splicing of the negative ring duct pieces and the staggered joint splicing function, the posture of the duct pieces in the shield launching stage is better controlled, the forming quality is higher, it is guaranteed that good splicing conditions exist in the initial stage of the positive ring duct pieces, and the quality problems of duct piece breaking, convergence, slab staggering and the like in the shield launching stage and the initial tunneling stage are avoided. The device is convenient to dismount and mount, can be repeatedly used, saves cost, is simple in structure, ingenious in design, low in manufacturing cost and easy and convenient to mount, can be widely applied to various tunnel constructions by adjusting the shape and the size of the device, and has great application value and economic prospects.

Description

Technical Field

[0001] The invention relates to a negative ring segment for shield tunneling, and in particular to a steel negative ring segment suitable for a socket-type joint segment. Background Art

[0002] The negative ring segment is a temporary structure that provides reaction force for the shield machine to advance at the initial stage of the shield. At the same time, the negative ring segment must be fastened with the positive ring segment to ensure the installation of the positive ring segment. Therefore, the structure of the negative ring segment must be the same or similar to that of the positive ring segment, and it must have sufficient rigidity and strength. Currently, the commonly used negative ring segments are in the form of steel structure and concrete structure.

[0003] If concrete segments are used as negative rings, the segments have a large weight. After the segments are removed from the shield tail, they are prone to deformation without additional reinforcement. At the same time, in the initial stage of the shield, the negative ring segments are prone to uneven force, which causes local stress concentration on the negative ring segments and causes damage to the segments. In addition, the segments are prone to collisions during installation and transportation, resulting in damage to the segments. Usually, concrete segments are scrapped after being used once as negative rings. The advantage of steel structure negative rings over concrete negative rings is that the segments themselves have high strength and rigidity and can be reused.

[0004] As a new type of structural form currently being promoted in the field of Shanghai rail transit, the socket-and-spigot segment is characterized by the fact that it does not require connecting bolts, but instead uses socket-and-spigot connectors to connect and fix adjacent rings and adjacent blocks, and perform staggered assembly. Since Shanghai rail transit segments were previously assembled in the form of through-seam assembly, there are currently a large number of negative rings in the form of through-seam assembly on the market. It is necessary to consider the conversion of the joint form and the conversion of the assembly form of the socket-and-spigot segment on the basis of retaining the existing negative ring segments assembled in the form of through-seam assembly, and at the same time let the segment assemblers be familiar with the assembly characteristics of the socket-and-spigot segment in advance. The advantages of the socket-and-spigot segment are high assembly precision and good segment forming quality. The disadvantage is that once the assembly is completed, the joint cannot be removed by conventional means and can only be disconnected destructively. After removal, the segment is damaged and cannot be reused. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a steel negative ring segment suitable for socket-type joint segments, so as to achieve a detachable socket-type negative ring segment, which can not only ensure the ring quality of the segment, but also meet the effective connection of the positive ring socket segment and realize the function of reuse.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A steel negative ring segment suitable for a socket-type joint segment comprises a steel negative ring body, a ring longitudinal seam connector, embedded parts and bolts. The steel negative ring body is composed of a plurality of segments. The segments of adjacent blocks are connected by longitudinal seam socket joints, and the segments of adjacent rings are connected by annular seam socket joints.

[0008] Furthermore, the steel negative ring segment body adjusts the distribution of the annular seam connectors according to the segment block form. There are 16 groups of single-ring annular seam connectors in total, which are distributed at 22.5°, and the F block is rotated to any one of the 16 hole positions.

[0009] Furthermore, the segments of the steel negative ring body are divided into two types of segments. One is a structural form in which the through-seam segments transition to staggered-seam segments, the jack surface is a barb-type threaded joint, the back jack surface is a bolt joint, and the longitudinal seam is a "CT" type joint; the other is a structural form in which both the jack surface and the back jack surface are barb-type threaded joints, and the longitudinal seam is a "CT" type joint.

[0010] Furthermore, the pipe segment with bolted joint on the back jack surface is connected to the original through-seam pipe segment through high-strength bolts, and the annular socket joint is transitioned from a bolted joint to a barbed threaded joint.

[0011] Furthermore, the annular socket joint is composed of a polyamide rod with a barbed thread and a steel structure embedded sleeve. The steel structure embedded sleeve is composed of two semicircular steel components and a base. The two semicircular steel components are connected separately by high-strength bolts, and then the integrated steel structure embedded sleeve is fixed to the end face of the pipe segment by high-strength bolts through the bolt holes reserved in the base.

[0012] Furthermore, the longitudinal socket joint is made of a "CT" type component made of ductile iron. A base for fixing the "CT" type component is made in the pipe segment, and the "C" type and "T" type components are respectively installed on the base through the bolt holes at the bottom of the component using high-strength bolts.

[0013] Furthermore, when installing the steel negative ring segment, after the embedded sleeve of the annular socket joint and the longitudinal seam "CT" type component are installed, one end of the thread of the polyamide rod with a barbed double-head thread is manually screwed into the embedded sleeve of the segment to be assembled, and the segment with the screw installed is longitudinally inserted into the installed previous ring segment through the assembly machine and the shield machine's jacking cylinder, and the negative ring segment is connected to form a whole by longitudinally inserting each block of the segment in turn.

[0014] Furthermore, when the steel negative ring segments are dismantled, the high-strength bolts connecting the segment bodies with the annular seam embedded sleeves and the longitudinal seam "CT"-type components are removed to separate the joints from the shield machine body, making the negative ring segments removable and reusable.

[0015] The beneficial effects of the present invention are:

[0016] Compared with the prior art, the present invention is easy to dismantle and install, can be reused, saves costs, and has high negative ring quality, small convergence deformation, small misalignment of single-ring and single-block segments, simple structure, ingenious design, low production cost, and easy installation. It can be widely used in various types of tunnel construction by adjusting its shape and size, and has great applicability and economic prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional schematic diagram of the socket-type negative ring T1 of the present invention;

[0018] Figure 2 It is a cross-sectional schematic diagram of the socket-type negative ring T2 of the present invention;

[0019] Figure 3 It is a schematic cross-sectional view of the socket-type negative ring of the present invention;

[0020] Figure 4 It is a schematic diagram of the annular seam connector of the present invention;

[0021] Figure 5 It is a schematic diagram of the annular seam connection sleeve of the present invention;

[0022] Figure 6 It is a schematic diagram of the longitudinal seam connecting piece of the present invention;

[0023] Figure 7 It is a schematic diagram of the arrangement of the longitudinal seam connector of the present invention;

[0024] In the figure: 1 is the T1 steel negative ring as a whole, 2 is the T2 steel negative ring as a whole, 3 is the reserved hole for the annular seam bolt assembly, 4 is the annular seam barbed thread assembly sleeve and base, 5 is the CT type connector, 6 is the through-seam steel pipe segment, 7 is the socket-type positive ring concrete pipe segment, 8 is the annular seam barbed thread screw, 9 is the longitudinal seam T-type connector, 10 is the longitudinal seam C-type connector, 11 is the CT type connector base, 12 is the CT type connector and the base connecting bolt, 13 is the sleeve connecting bolt, 14 is the sleeve and the negative ring end plate connecting bolt, 15 is the T-type connector and the open slide groove, 16 is the C-type connector and the open slide groove. DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the following embodiments are merely illustrative in nature, and the present invention is not intended to limit its applicable objects or uses, and the present invention is not limited to the following embodiments.

[0026] like Figures 1 to 7As shown, a steel negative ring segment suitable for socket-type joint segments of the present invention includes a steel negative ring body, a ring longitudinal seam connector, embedded parts, and bolts. The steel negative ring body is composed of a plurality of segments, adjacent segments of the blocks are connected by longitudinal seam connectors, and adjacent segments of the rings are connected by ring seam connectors.

[0027] The distribution of annular joint connectors of steel negative ring segments is adjusted according to the segment block form. There are 16 groups of single-ring annular joint connectors in total, which are distributed at 22.5°. The F block can be rotated to any of the 16 hole positions.

[0028] There are two types of steel negative ring segments: one is a structural form that transitions from a through-seam segment to a staggered segment, with the jack surface being a barbed threaded joint, the back jack surface being a bolted joint, and the longitudinal seam being a "CT" type joint. The other is a structural form in which both the jack surface and the back jack surface are barbed threaded joints, and the longitudinal seam is a "CT" type joint.

[0029] The pipe segments with bolted joints on the back jack surface are connected to the original through-seam pipe segments with high-strength bolts, and the annular seam joints are transitioned from bolted joints to barbed threaded joints.

[0030] The annular socket joint is composed of a polyamide rod with a barbed thread and a steel structure embedded sleeve. The steel structure embedded sleeve consists of two semicircular steel components and a base. The two semicircular steel components are connected with high-strength bolts, and then the embedded sleeve is fixed to the end face of the pipe segment through the bolt holes reserved in the base. The longitudinal socket joint is made of a "CT" type component made of ductile iron. A base for fixing the "CT" type component is made in the pipe segment, and the "C" and "T" type components are installed on the base through the bolt holes at the bottom of the components using high-strength bolts.

[0031] When installing the steel negative ring segment, after the above-mentioned annular joint embedded sleeve and longitudinal seam "CT" type component are installed, one end of the polyamide rod with barbed double-thread is manually screwed into the embedded sleeve of the segment to be assembled, and the segment with the screw installed is longitudinally inserted into the previous ring segment that has been installed through the assembly machine and the shield machine's jacking cylinder, and the negative ring segment is connected to form a whole by longitudinally inserting each block of the segment in turn.

[0032] When dismantling the steel negative ring segments, the high-strength bolts connecting the segment bodies with the annular seam embedded sleeves and the longitudinal seam "CT" type components are removed to separate the joints from the shield machine body, making the negative ring segments removable and reusable.

[0033] In this embodiment, before the negative ring segment is assembled, the annular seam barbed thread assembly sleeve and the base 4 are assembled and assembled with connecting bolts 13. After the assembly is completed, the sleeve is installed to the inner end surface of the negative ring compartment through the connecting bolts 14. Then the T-shaped member 9 and the C-shaped member 10 are respectively installed on the base 11 and connected by the connecting bolts 12.

[0034] In this embodiment, when assembling the negative ring segments, due to the structural form of the T-shaped member 9 and the C-shaped member 10, the first segment to be installed must have the C-shaped member 10 arranged on the jack side and the T-shaped member 9 arranged on the back jack side. Therefore, the first segment to be installed must be installed with the B2 block, then the B3 / B1 block, then the L2 / L1 block, and finally the F block.

[0035] In this embodiment, when the negative ring segments are assembled, the through-seam steel ring 6 is installed first, then the socket-type negative ring 2 is installed at T2, and then the socket-type negative ring 1 is installed at T1. The socket-type negative ring 1 of T1 can be selected according to the actual needs on site.

[0036] In this embodiment, when removing the negative ring segment, the connecting bolts 13 and 14 are removed, the barbed thread assembly sleeve is removed, the annular seam barbed thread screw 8 is pulled out, and the connection between the negative rings is disconnected first. Then the connecting bolts 15 are removed, and the T-shaped member 9 and the C-shaped connector 10 are pulled out along the T-shaped connector opening chute 15 and the C-shaped connector opening chute 16. According to the above steps, the upper, left and right sides, and lower segments are removed one by one in order.

[0037] The present invention can realize accurate transition of the existing through-seam negative rings in the market by optimizing the negative ring joint; by high-precision assembly of the negative ring segments and the staggered assembly function, the segment posture in the initial stage of the shield can be better controlled, the molding quality is higher, and good assembly conditions are guaranteed in the initial stage of the positive ring segments, avoiding the occurrence of segment breakage, convergence, misalignment and other quality problems in the initial stage of the shield and the initial excavation stage; by arranging a detachable annular longitudinal seam joint embedded part in the negative ring compartment, the embedded part is installed before the negative ring is installed, and the embedded part is removed before the negative ring is removed, and then the annular longitudinal seam joint of the negative ring is removed; a T2 negative ring is arranged to transition from the through-seam negative ring to the socket-type negative ring, and a bolt reserved hole is arranged on the back jack surface (annular seam joint) of the T2 negative ring, which is connected to the through-seam negative ring by M30 high-strength bolts; a barbed thread embedded part is arranged on the jack surface (annular seam joint) of the T2 negative ring, which is connected to the socket-type negative ring by a barbed thread rod. Realize the transition from the through-seam negative ring to the socket-type negative ring. T1 negative ring annular joints all use barbed threaded rods and their matching embedded parts; the bolt hole distribution is optimized according to the block form of the segment, and 16 groups of longitudinal joints are used, evenly distributed at 22.5°, so that the segment F block can be freely selected. Through the rotation of the segment, staggered assembly is achieved to avoid the negative ring segment from slipping out of the shield tail due to the lack of external soil tightening force, resulting in segment deformation, and difficulty in assembling the positive ring segment. The socket-type negative ring annular joint is composed of barbed threaded polyamide screws and embedded steel components, so two semicircular steel components are set in the negative ring lattice, and the two steel components are connected to the main body and the negative ring end face by high-strength bolts; the socket-type negative ring longitudinal joint is a "CT" type component made of ductile iron, so the "CT" type component is pre-installed in the negative ring by setting a stiffening plate in the negative ring lattice.

[0038] The above embodiments of the present invention are described in detail, but the above contents are only used as the preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the present invention are still within the scope of this patent.

Claims

1. A steel negative ring segment suitable for a socket-and-spigot joint segment, characterized in that: It includes a steel negative ring body, a ring longitudinal seam connector, embedded parts, and bolts. The steel negative ring body is composed of several segments. The segments of adjacent blocks are connected by longitudinal seam socket joints, and the segments of adjacent rings are connected by annular seam socket joints.

2. The steel negative ring segment suitable for socket-and-spigot joint segments according to claim 1, characterized in that: The distribution of annular joint connectors of the steel negative ring segment body is adjusted according to the segment block form. There are 16 groups of single-ring annular joint connectors in total, which are distributed at 22.5°. The F block is rotated to any one of the 16 hole positions.

3. The steel negative ring segment suitable for socket-and-spigot joint segments according to claim 1, characterized in that: The segments of the steel negative ring body are divided into two types of segments. One is a structural form in which the through-seam segments transition to staggered-seam segments, with the jack surface being a barbed threaded joint, the back jack surface being a bolted joint, and the longitudinal seam being a "CT" type joint; the other is a structural form in which both the jack surface and the back jack surface are barbed threaded joints, and the longitudinal seam is a "CT" type joint.

4. The steel negative ring segment suitable for socket-type joint segments according to claim 3, characterized in that: The pipe segment with bolted joint on the back jack surface is connected to the original through-seam pipe segment through high-strength bolts, and the annular socket joint is transitioned from a bolt joint to a barbed threaded joint.

5. The steel negative ring segment suitable for socket-and-spigot joint segments according to claim 1, characterized in that: The annular socket joint is composed of a polyamide rod with a barbed thread and a steel structure embedded sleeve. The steel structure embedded sleeve is composed of two semicircular steel components and a base. The two semicircular steel components are connected separately with high-strength bolts, and then the integrated steel structure embedded sleeve is fixed to the end face of the segment with high-strength bolts through the bolt holes reserved in the base.

6. The steel negative ring segment suitable for socket-and-spigot joint segments according to claim 5, characterized in that: The longitudinal socket joint is made of a "CT" type component made of ductile iron. A base for fixing the "CT" type component is made inside the pipe segment, and the "C" type and "T" type components are installed on the base through the bolt holes at the bottom of the component using high-strength bolts.

7. The steel negative ring segment suitable for socket-and-spigot joint segments according to claim 6, characterized in that: When installing the steel negative ring segment, after the embedded sleeve of the annular socket joint and the longitudinal seam "CT" type component are installed, one end of the thread of the barbed double-threaded polyamide rod is manually screwed into the embedded sleeve of the segment to be assembled, and the segment with the screw installed is longitudinally inserted into the installed previous ring segment through the assembly machine and the shield machine's jacking cylinder, and the negative ring segment is connected to form a whole by longitudinally inserting each block of the segment in turn.

8. The steel negative ring segment suitable for socket-and-spigot joint segments according to claim 7, characterized in that: When dismantling the steel negative ring segments, the high-strength bolts connecting the segment bodies with the annular seam embedded sleeves and the longitudinal seam "CT" type components are removed to separate the joints from the shield machine body, making the negative ring segments removable and reusable.

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