Shield anti-floating duct piece structure

Abstract

The utility model provides a shield anti-floating segment structure and relates to the technical field of shield segments, the shield anti-floating segment structure comprises a segment main body, a segment through groove is arranged on the circumferential surface of the segment main body, and a four-claw reinforcing disc is fixed on the circumferential surface of the segment main body. In the prior art, floating is controlled by optimizing a grouting process, adjusting a shield posture and other measures, but the problems of slow slurry solidification, insufficient structural constraint and the like exist, the structural constraint suffered by duct pieces mainly comes from surrounding soil and installed duct pieces, and due to the complexity of geological conditions and the uncertainty of a construction process, the duct pieces are difficult to float. Sometimes, it is difficult to guarantee that the duct piece is subjected to sufficient structural constraint, the constraint effect on the duct piece in a soft soil layer is weak, the soil body structure around the duct piece is looser, and effective supporting and constraint are difficult to provide, so that when the duct piece is subjected to underground water buoyancy and other external force, the duct piece floats upwards more easily, and the working efficiency is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield segment technology field especially relates to a shield prevents floating segment structure. BACKGROUND

[0002] The shield prevents floating segment structure is a special segment structure specially designed for inhibiting the upward deformation of the segment due to the buoyancy or external force in tunnel construction, and the groundwater buoyancy is an important factor that cannot be ignored. In the stratum with high groundwater level, the segment is subjected to the upward buoyant force of the groundwater, and the size of the buoyant force is closely related to the groundwater level, the water pressure and the volume and shape of the segment. When the groundwater buoyancy exceeds a certain limit, the upward force is generated on the segment, which promotes the upward floating of the segment.

[0003] In the prior art, the upward floating of the shield segment is mainly caused by the combined action of the groundwater buoyancy, the reverse thrust component of the shield machine, the insufficient synchronous grouting and the excessively fast tunneling speed. The prior art controls the upward floating by optimizing the grouting process and adjusting the shield posture, but there are problems such as slow solidification of the grout and insufficient structural constraint. The structural constraint on the segment mainly comes from the surrounding soil and the installed segment. However, due to the complexity of the geological conditions and the uncertainty of the construction process, it is sometimes difficult to ensure that the segment is subjected to sufficient structural constraint. In the soft soil stratum, the constraint on the segment is weak. In the fault, broken zone and other places, the soil structure around the segment is more loose, and it is difficult to provide effective support and constraint. This makes the segment more likely to float upward when subjected to the groundwater buoyancy and other external forces, resulting in low work efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems in the prior art and provides a shield prevents floating segment structure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a shield prevents floating segment structure, which comprises a segment main body, a segment through groove is formed in the peripheral surface of the segment main body, a four-claw reinforcing disc is fixed to the peripheral surface of the segment main body, a U-shaped path piece is slidably connected to the inner wall of the four-claw reinforcing disc, one end of the U-shaped path piece is slidably connected to the inner wall of the segment through groove, a path groove is formed in the inner wall of the U-shaped path piece, a plurality of force-changing rotating columns are rotatably connected to the inner wall of the path groove, an installation frame is detachably connected to the top of the segment through groove, a force-collecting wheel is rotatably connected to the inner wall of the installation frame, the force-collecting wheel is driven by a motor, a steel wire is fixed to the inner wall of the four-claw reinforcing disc, and one end of the steel wire is fixed to the peripheral surface of the force-collecting wheel.

[0006] Preferably, the pipe piece body is provided with a sunken arc groove at one end, and a reinforcing insert is fixed to the inner wall of the sunken arc groove; the other end of the pipe piece body is provided with an arc receiving groove; in the prior art, the connection between the two ends of the shield pipe piece is usually aligned first and then fixed by bolts; this connection method has certain disadvantages in actual construction process; when the shield pipe piece floats up, the connection mainly relies on bolts, and it is difficult to maintain the stability of the product as a whole; because the external force generated by the floating up acts on the connection, the multiple pipe piece bodies are prone to deformation or gaps; at the same time, the bolts bear a large pressure under the action of the external force, and are prone to breakage; the bolt breakage and instability of the connection not only affect the installation quality and sealing performance of the pipe piece, but also hinder the subsequent construction process, greatly reduce the work efficiency, delay the engineering progress; in view of the above problems, the utility model adopts the installation of the reinforcing insert to solve the problem; when the staff assembles the pipe piece body, the reinforcing insert is only inserted into the arc receiving groove; because the reinforcing insert is installed in the sunken arc groove, the reinforcing insert has better fixing effect; when the product deforms, the cooperation between the multiple reinforcing inserts and the arc receiving groove enables the product to be well nested by the multiple cooperating parts when affected by the floating stress, so that the product always maintains a good predetermined state, prevents floating up, and improves the stability of the equipment.

[0007] Preferably, the pipe piece body is provided with a sunken arc groove at one end, and a reinforcing insert is fixed to the inner wall of the sunken arc groove; the other end of the pipe piece body is provided with an arc receiving groove; in the prior art, the connection between the two ends of the shield pipe piece is usually aligned first and then fixed by bolts; this connection method has certain disadvantages in actual construction process; when the shield pipe piece floats up, the connection mainly relies on bolts, and it is difficult to maintain the stability of the product as a whole; because the external force generated by the floating up acts on the connection, the multiple pipe piece bodies are prone to deformation or gaps; at the same time, the bolts bear a large pressure under the action of the external force, and are prone to breakage; the bolt breakage and instability of the connection not only affect the installation quality and sealing performance of the pipe piece, but also hinder the subsequent construction process, greatly reduce the work efficiency, delay the engineering progress; in view of the above problems, the utility model adopts the installation of the reinforcing insert to solve the problem; when the staff assembles the pipe piece body, the reinforcing insert is only inserted into the arc receiving groove; because the reinforcing insert is installed in the sunken arc groove, the reinforcing insert has better fixing effect; when the product deforms, the cooperation between the multiple reinforcing inserts and the arc receiving groove enables the product to be well nested by the multiple cooperating parts when affected by the floating stress, so that the product always maintains a good predetermined state, prevents floating up, and improves the stability of the equipment.

[0008] Preferably, the reinforcing insert is provided with a reinforcing triangular arc at one end; the reinforcing triangular arc is fixed to one side of the inner wall of the sunken arc groove; the surface of the reinforcing insert and the surface of the pipe piece body are both provided with inclined bolt grooves; the reinforcing triangular arc further increases the fixing effect between the reinforcing insert and the sunken arc groove; the inclined bolt grooves prevent the bolts from being directly impacted, provide a buffer, and improve the service life of the equipment.

[0009] Preferably, the U-shaped path piece is fixed with wing plates at both ends, the surface of the wing plate is fixed with an auxiliary spring, the side surface of the wing plate at one end of the U-shaped path piece is in sliding connection with the inner wall of the four-jaw reinforcing disc, and the side surface of the wing plate at the other end of the U-shaped path piece is in sliding connection with the inner wall of the slice through groove, so that the product buffer amount is given, damage caused by floating is prevented, and the service life of the equipment is improved.

[0010] Preferably, the circumferential surface of the pipe slice body is fixed with anti-skid ring strips, and the surface of the anti-skid ring strip is provided with anti-skid grooves, so that the anti-skid ring strip is used to enhance the bonding force of the slurry and the pipe slice by using the flow characteristics of the slurry, the anti-skid grooves play the role of flow guide grooves, can guide the slurry to quickly fill the annular gap, the convex structure forms an "anchoring effect", increases the friction between the pipe slice and the surrounding soil, resists the buoyancy, and improves the stability of the equipment.

[0011] Preferably, the rubber layer is provided on the surface of the force changing rotating column, and the surface of the rubber layer is provided with anti-skid lines, so that the wear of the steel wire is reduced, and the service life of the equipment is improved.

[0012] Beneficial effects:

[0013] 1. In the prior art, the floating of the shield pipe slice is caused by the combined action of the underground water buoyancy, the reverse thrust component of the shield machine, the insufficient synchronous grouting, the too fast tunneling speed and other factors. The prior art controls the floating by optimizing the grouting process and adjusting the shield posture, but there are problems such as slow slurry solidification and insufficient structural constraint. The structural constraint on the pipe slice mainly comes from the surrounding soil and the installed pipe slice. However, due to the complexity of the geological conditions and the uncertainty of the construction process, it is sometimes difficult to ensure that the pipe slice is subjected to sufficient structural constraint. In soft soil layers, the constraint on the pipe slice is weak. In fault zones and fracture zones, the soil structure around the pipe slice is more loose and it is difficult to provide effective support and constraint. This makes the pipe slice more likely to float when subjected to the underground water buoyancy and other external forces, resulting in low work efficiency. To solve such problems, the utility model adopts the mode of installing a U-shaped path piece, so that when one end of the pipe slice body is floated and raised, the operator can start the motor to make the force collecting wheel rotate and tighten the steel wire. The steel wire changes the force direction through the action of multiple force changing rotating columns, so that the four-jaw reinforcing disc is subjected to the vertical force of the steel wire. The four-jaw reinforcing disc further increases the contact area with the pipe slice body, prevents the pipe slice body from being damaged, makes the four-jaw reinforcing disc and the steel wire pull down one end of the pipe slice body vertically, makes it difficult for the pipe slice body to be raised, and makes the pipe slice body always keep parallel, preventing floating and raising, and improving the work efficiency.

[0014] 2、In the prior art, the connection between the two ends of the shield segment body is usually aligned first and then fixed by bolts. This connection method has certain disadvantages in actual construction process. When the shield segment body floats up, the connection mainly relies on the bolts, so it is difficult to keep the overall stability of the product. Because the external force generated by the floating up acts on the connection, the deformation or gap between the multiple segment bodies is easy to occur. At the same time, the bolts bear a large pressure under the action of the external force, and are prone to breakage. The bolt breakage and instability of the connection not only affect the installation quality and sealing performance of the segment, but also hinder the subsequent construction process, greatly reduce the work efficiency, delay the project progress, and solve the problems. The utility model adopts the installation of the reinforced insert piece to solve the problems. When the staff assembles the segment body, only needs to insert the reinforced insert piece into the arc groove. Because the reinforced insert piece is installed in the sunken arc groove, the reinforced insert piece has better fixing effect. When the product deforms, the cooperation between the multiple reinforced insert pieces and the arc groove makes the product keep a good predetermined state through the better close nesting of the multiple cooperating pieces when affected by the floating stress, so as to prevent the floating up and improve the stability of the equipment.

[0015] 3、In the prior art, the two ends of the segment body are assembled into a circle. Because the two ends of the segment body are usually fixed by bolts, a better temporary fixing and positioning assembly is lacked before the bolt installation, so that the product installation is complex and easy to be skewed, which leads to poor equipment installation effect or low work efficiency, reduces the user experience. In view of such problems, the utility model adopts the installation of the trapezoidal piece to solve the problems. When the staff assembles the two ends of the segment body, the trapezoidal piece is slid into the trapezoidal groove, so that the multiple segment bodies can temporarily keep a good stable state, which is convenient for the staff to further fix. At the same time, because of the cooperation between the trapezoidal groove and the trapezoidal piece, the possibility of skewing between the segment bodies is greatly reduced, which further prevents the floating up. The embedded angle rubber strip greatly increases the friction, prevents the slipping, improves the user experience and the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0017] Figure 2 It is a three-dimensional structure schematic view of the installation frame of the utility model;

[0018] Figure 3 It is a three-dimensional structure schematic view of the U-shaped path piece of the utility model;

[0019] Figure 4 It is a three-dimensional structure schematic view of the trapezoidal groove of the utility model;

[0020] Figure 5 It is the three-dimensional structure schematic view of the embedded angle rubber strip of the utility model;

[0021] Figure 6 It is the sectional view of the arc receiving groove of the utility model;

[0022] Figure 7 It is the sectional view of the force changing rotating column of the utility model;

[0023] Figure 8 It is the sectional view of the wing plate of the utility model;

[0024] Figure 9 It is the sectional view of the slice passing groove of the utility model.

[0025] Legend:

[0026] 1, tube slice main body; 2, four jaw reinforcing disc; 201, U-shaped path piece; 202, path groove; 203, force changing rotating column; 204, steel wire; 205, installation frame; 206, force collecting wheel; 207, slice passing groove; 3, reinforcing insert piece; 301, sunken arc groove; 302, arc receiving groove; 4, inclined bolt groove; 401, reinforcing triangular arc; 5, trapezoidal groove; 501, trapezoidal piece; 502, embedded angle rubber strip; 6, wing plate; 601, auxiliary spring; 7, anti-skid ring strip. DETAILED DESCRIPTION

[0027] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor all belong to the protection scope of the utility model.

[0028] The specific embodiments of the utility model are described below in combination with the drawings. Specific embodiments:

[0030] Reference Figures 1-9The utility model provides a kind of shield prevents pipe piece structure of floating, including pipe piece main body 1, pipe piece main body 1 peripheral surface is equipped with piece through slot 207, four-jaw reinforcing disc 2 is fixed in pipe piece main body 1 peripheral surface, U-shaped path piece 201 is slidably connected in four-jaw reinforcing disc 2 inner wall, U-shaped path piece 201 one end is slidably connected with piece through slot 207 inner wall, path slot 202 is equipped in U-shaped path piece 201 inner wall, a plurality of force-changing rotary column 203 are rotatably connected in path slot 202 inner wall, installation frame 205 is detachably connected in piece through slot 207 top, force-recovery wheel 206 is rotatably connected in installation frame 205 inner wall, force-recovery wheel 206 is driven by motor, steel wire 204 is fixed in four-jaw reinforcing disc 2 inner wall, steel wire 204 one end is fixed with force-recovery wheel 206 peripheral surface.Pipe piece main body 1 one end is equipped with sunken arc groove 301, reinforcing insert 3 is fixed in sunken arc groove 301 inner wall, pipe piece main body 1 other end is equipped with arc receiving groove 302, in the structure of shield pipe piece, the connecting mode between the both ends of pipe piece main body 1 is usually aligned first and then fixed by bolt, this connecting mode has certain drawbacks in actual construction process, when encountering the situation of shield pipe piece floating, since connection mainly relies on bolt, it is difficult to keep the stability of product as a whole, because the external force generated by floating acts on connecting portion, so that deformation or gap is prone to occur between multiple pipe piece main bodies 1, simultaneously, bolt is under great pressure under this external force, and it is extremely easy to appear fracture phenomenon, and bolt fracture and the instability of connecting portion not only can affect the installation quality and sealing performance of pipe piece, but also can make subsequent construction process be blocked, lead to that work efficiency is greatly reduced, delay engineering progress, the mode of installing reinforcing insert 3 is solved, realizes when staff assembles pipe piece main body 1, only needs to insert reinforcing insert 3 into arc receiving groove 302, since reinforcing insert 3 is installed in sunken arc groove 301, reinforcing insert 3 has better fixing effect, when product deforms, the cooperation between multiple reinforcing inserts 3 and arc receiving groove 302 makes product keep better predetermined state when being affected by floating stress, through the better close nesting of multiple cooperating pieces, so that floating is prevented, to improve the stability of equipment.

[0031] The trapezoidal groove 5 is arranged on one side of the pipe piece body 1, and the embedded angle rubber strips 502 are fixed on the inner walls of the trapezoidal groove 5. The trapezoidal pieces 501 are fixed on the other side of the pipe piece body 1, and the embedded angle rubber strips 502 are fixed on the two sides of the trapezoidal pieces 501. When the two ends of the pipe piece body 1 are assembled into a circle, the two ends of the pipe piece body 1 are often fixed by bolts, which causes a lack of a good temporary fixing and positioning assembly before the bolt installation, so that the product installation is relatively complex and easy to be inclined, which causes poor equipment installation effect or low work efficiency, and reduces the user experience. The installation of the trapezoidal piece 501 solves the problem, so that the workers can slide the trapezoidal piece 501 into the trapezoidal groove 5 when assembling the two ends of the pipe piece body 1, and the multiple pipe piece bodies 1 can be temporarily kept in a good stable state, which is convenient for the workers to further fix. At the same time, the cooperation between the trapezoidal groove 5 and the trapezoidal piece 501 greatly reduces the possibility of inclination between the pipe piece bodies 1, further prevents floating, greatly increases the friction force through the embedded angle rubber strips 502, prevents slipping, and achieves the effects of improving the user experience and improving the work efficiency. The reinforced triangular arc 401 is fixed at one end of the reinforced insert piece 3, and the reinforced triangular arc 401 is fixed on one side of the inner wall of the sunken arc groove 301. The inclined bolt grooves 4 are arranged on the surfaces of the reinforced insert piece 3 and the pipe piece body 1, which further increases the fixing effect between the reinforced insert piece 3 and the sunken arc groove 301 through the reinforced triangular arc 401. The inclined bolt grooves 4 prevent the bolts from being directly impacted and provide a buffer, which improves the service life of the equipment. The wing plates 6 are fixed at the two ends of the U-shaped path piece 201, the auxiliary springs 601 are fixed on the surfaces of the wing plates 6, the side surface of the wing plate 6 at one end of the U-shaped path piece 201 is slidably connected with the inner wall of the four-claw reinforcing disc 2, and the side surface of the wing plate 6 at the other end of the U-shaped path piece 201 is slidably connected with the inner wall of the piece through groove 207. The U-shaped path piece 201 provides a buffer for the product to prevent damage caused by floating, which improves the service life of the equipment. The anti-skid ring strips 7 are circumferentially arranged on the circumferences of the pipe piece bodies 1, and the anti-skid grooves are arranged on the surfaces of the anti-skid ring strips 7. The anti-skid ring strips 7 utilize the flow characteristics of the slurry to enhance the bonding force between the slurry and the pipe piece, the anti-skid grooves act as flow guide grooves, can guide the slurry to quickly fill the annular gap, the convex structure forms an “anchoring effect”, increases the friction force between the pipe piece and the surrounding soil, and resists the buoyancy, which improves the stability of the equipment. The rubber layer is coated on the circumference of the force-changing rotating column 203, and the anti-skid lines are arranged on the surface of the rubber layer, which reduces the wear of the steel wire 204 and improves the service life of the equipment.

[0032] The utility model discloses a working principle: when the segment main body 1 one end floats and rises, the staff can start motor and make force collecting wheel 206 rotate and tighten steel wire 204, and steel wire 204 passes through the effect of multiple force changing rotary column 203, makes the stress direction of steel wire 204 change, finally makes four jaw reinforcing disc 2 receive the force of steel wire 204 vertical direction, further increases the contact area of four jaw reinforcing disc 2 with segment main body 1 through four jaw reinforcing disc 2, prevents segment main body 1 damage simultaneously, makes four jaw reinforcing disc 2 and steel wire 204 vertical downward pull segment main body 1 one end, makes segment main body 1 difficult to rise, makes segment main body 1 always keep parallel, prevents floating and rising, when the staff is assembling segment main body 1, only needs to insert reinforcing insert piece 3 into arc receiving groove 302, because reinforcing insert piece 3 is installed in sunken arc groove 301, makes reinforcing insert piece 3 have better fixing effect, when product produces deformation, the cooperation between multiple reinforcing insert pieces 3 and arc receiving groove 302 makes product when being affected by floating stress, through the better close nesting of multiple cooperation pieces, always keeps better established state, prevents floating and rising.

[0033] In the utility model, unless another definite provision and limitation, first feature is on the " upper " or " lower " of second feature can include that first and second features are directly contacted, also can include that first and second features are not directly contacted but are contacted through additional feature between them. Moreover, first feature is on " upper ", " upper " and " upper surface " of second feature includes that first feature is directly above and obliquely above second feature, or only indicates that the horizontal height of first feature is higher than second feature. First feature is below, below and below of second feature includes that first feature is directly below and obliquely below second feature, or only indicates that the horizontal height of first feature is less than second feature.

[0034] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only preferred examples of the utility model and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A shield anti-floatation segment structure comprising a segment body (1), characterized in that: The pipe piece body (1) is provided with a piece through groove (207) on the peripheral surface, and a four-claw reinforcing disc (2) is fixed on the peripheral surface of the pipe piece body (1), the inner wall of the four-claw reinforcing disc (2) is slidably connected with a U-shaped path piece (201), one end of the U-shaped path piece (201) is slidably connected with the inner wall of the piece through groove (207), the inner wall of the U-shaped path piece (201) is provided with a path groove (202), a plurality of force-changing rotary columns (203) are rotatably connected with the inner wall of the path groove (202), a mounting frame (205) is detachably connected with the top of the piece through groove (207), a force collecting wheel (206) is rotatably connected with the inner wall of the mounting frame (205), the force collecting wheel (206) is driven by a motor, a steel wire (204) is fixed on the inner wall of the four-claw reinforcing disc (2), and one end of the steel wire (204) is fixed with the peripheral surface of the force collecting wheel (206).

2. The pipe segment according to claim 1, wherein: The pipe piece body (1) is provided with a piece through groove (207) on the peripheral surface, and a four-claw reinforcing disc (2) is fixed on the peripheral surface of the pipe piece body (1), the inner wall of the four-claw reinforcing disc (2) is slidably connected with a U-shaped path piece (201), one end of the U-shaped path piece (201) is slidably connected with the inner wall of the piece through groove (207), the inner wall of the U-shaped path piece (201) is provided with a path groove (202), a plurality of force-changing rotary columns (203) are rotatably connected with the inner wall of the path groove (202), a mounting frame (205) is detachably connected with the top of the piece through groove (207), a force collecting wheel (206) is rotatably connected with the inner wall of the mounting frame (205), the force collecting wheel (206) is driven by a motor, a steel wire (204) is fixed on the inner wall of the four-claw reinforcing disc (2), and one end of the steel wire (204) is fixed with the peripheral surface of the force collecting wheel (206).

3. The pipe segment according to claim 1, wherein: The pipe piece body (1) is provided with a piece through groove (207) on the peripheral surface, and a four-claw reinforcing disc (2) is fixed on the peripheral surface of the pipe piece body (1), the inner wall of the four-claw reinforcing disc (2) is slidably connected with a U-shaped path piece (201), one end of the U-shaped path piece (201) is slidably connected with the inner wall of the piece through groove (207), the inner wall of the U-shaped path piece (201) is provided with a path groove (202), a plurality of force-changing rotary columns (203) are rotatably connected with the inner wall of the path groove (202), a mounting frame (205) is detachably connected with the top of the piece through groove (207), a force collecting wheel (206) is rotatably connected with the inner wall of the mounting frame (205), the force collecting wheel (206) is driven by a motor, a steel wire (204) is fixed on the inner wall of the four-claw reinforcing disc (2), and one end of the steel wire (204) is fixed with the peripheral surface of the force collecting wheel (206).

4. The pipe segment according to claim 3, wherein: The pipe piece body (1) is provided with a piece through groove (207) on the peripheral surface, and a four-claw reinforcing disc (2) is fixed on the peripheral surface of the pipe piece body (1), the inner wall of the four-claw reinforcing disc (2) is slidably connected with a U-shaped path piece (201), one end of the U-shaped path piece (201) is slidably connected with the inner wall of the piece through groove (207), the inner wall of the U-shaped path piece (201) is provided with a path groove (202), a plurality of force-changing rotary columns (203) are rotatably connected with the inner wall of the path groove (202), a mounting frame (205) is detachably connected with the top of the piece through groove (207), a force collecting wheel (206) is rotatably connected with the inner wall of the mounting frame (205), the force collecting wheel (206) is driven by a motor, a steel wire (204) is fixed on the inner wall of the four-claw reinforcing disc (2), and one end of the steel wire (204) is fixed with the peripheral surface of the force collecting wheel (206).

5. The pipe segment according to claim 2, wherein: ​ 6. The shield anti-floating segment structure according to claim 5, characterized in that: ​ 7. The pipe segment according to claim 1, wherein: ​ 8. The shield anti-floating segment structure according to claim 7, characterized in that: ​ 9. The pipe segment according to claim 1, wherein: ​ 10. The pipe segment according to claim 1, wherein: ​

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