CN214247342U - Take prefabricated section of jurisdiction of bracket connection base to assemble lining cutting ring and assemble structure thereof - Google Patents

Abstract

A prefabricated segment assembly lining circular ring with a bracket connecting base and an assembly structure thereof are provided with symmetrical double-sided wedge-shaped rings; the assembly point of the capping blocks is located at 0 degree of the lining circular ring, the ring width of the outer diameter of the circular ring at the point is the minimum value or the maximum value, the first standard block is located at 180 degrees of the point opposite to the capping blocks, the second standard blocks are adjacent to two sides of the capping blocks, the inner arc surfaces of the second standard blocks and the adjacent blocks are provided with bracket connecting bases which are integrally formed and protrude out of the inner arc surfaces, the bracket connecting bases are formed by connecting base planes in the horizontal plane and the vertical plane, four bracket connecting bases are symmetrically distributed in the lining circular ring, and the formed lining circular ring is in a mode 1 or a mode 4. And the whole splicing of the top sealing block and the adjacent blocks at two sides rotates 180 degrees around the Y axis to be in place, and the lining circular ring formed by the first standard block and the whole splicing of the standard blocks sequentially spliced with the first standard block rotating 180 degrees around the Z axis and mirroring the whole splicing in place is in a mode 2 or a mode 3. The universality of the segment is increased, and the drilling and bar planting on the inner arc surface of the segment are avoided.

Description

Take prefabricated section of jurisdiction of bracket connection base to assemble lining cutting ring and assemble structure thereof

Technical Field

The utility model belongs to the technical field of building engineering, concretely relates to take prefabricated section of jurisdiction of bracket connection base to assemble lining cutting ring and assemble structure for the inside lining cutting section of jurisdiction of traffic tunnel that the shield constructs the method and builds is assembled.

Background

The internal space of a traffic tunnel constructed by a shield method is generally divided into three layers from top to bottom according to functional partitions: the key smoke exhaust channel layer, the motor vehicle driving channel layer and the evacuation rescue and pipeline corridor layer are shown in the figure 1. The components such as flue plate, driving plate, etc. realize the atress transmission with the major structure through both ends bracket support. The bracket support protrudes out of the inner arc surface of the duct piece and is connected with the duct piece structure into a whole.

In the prior art, a construction method of planting bars on assembled duct pieces for anchoring and reappearing for pouring a bracket support is generally adopted. The method has the following defects:

(1) the drilling damages the segment structure, and particularly, the damage of the segment structure is difficult to repair for the assembled lining structure.

(2) The drilling positioning is difficult, and the waste hole rate is high. Reinforced concrete section of jurisdiction adopts high accuracy steel mould piecemeal prefabricated forming, and concrete strength grade is higher, the smooth circle of cambered surface is in the same direction as, inside reinforcing bar is crisscross, during drilling operation, and positioning accuracy is difficult to guarantee, if creep into the position and the conflict of the inside reinforcing bar of section of jurisdiction, then further damage structure bearing capacity. This problem is particularly acute when drilling holes that are not perpendicular to the inner arc surface of the segment is desired.

(3) The technical characteristics of drilling and bar planting anchoring and the field conditions limit, the difficulty of forming an integral structure by the cast-in-place bracket and the prefabricated pipe piece is high, and the connection part of the cast-in-place bracket and the prefabricated pipe piece is a risk point for controlling the construction quality in the aspects of reliable force transmission, water tightness, durability in use and the like.

(4) The construction operation such as drilling, bar planting, cast-in-place bracket and the like has high strength, low work efficiency and poor environment, and the construction operation is parallel to shield tunneling and has more cross interference.

In engineering practice, measures such as improving the assembling quality, marking the main reinforcement position on the inner arc surface of the duct piece and accurately positioning the reinforcement by adopting a nondestructive testing technology before drilling are adopted, so that the quality problem of drilling and reinforcement planting is improved, but the effect is very little.

Except for the general application of the steel bar planting anchoring mode in engineering, the modes of presetting a steel plate, reserving steel bars, pre-buried steel bar connectors, prefabricating with brackets and the like on the inner surface of a segment are researched and tried aiming at the connection mode of the bracket and the segment.

Modes such as pre-burying, reserving, prefabricating and the like face a common problem under the technical scheme that a large-diameter shield tunnel generally adopts a universal wedge-shaped lining and fits a line central line through orderly rotation of pipe rings: and the uncertainty of the splicing point position of the general wedge-shaped ring, namely the position of the cross section of the pipe block.

The splicing point position of the lining circular ring depends on design conditions such as a wedge-shaped mode, wedge amount, line leveling parameters and the like, and the splicing point position implementation scheme of a certain ring segment depends on the real-time posture of the shield tunneling machine.

The wedge amount determines the fitting capacity of the single-ring lining circular ring to the horizontal and vertical line curves, the horizontal and vertical line curves and the combined line conditions determine the fitting target of the lining circular ring, and the optimal scheme of the segment splicing point positions is finally screened by combining the space attitude of the shield tunneling machine and the requirements of real-time adjustment and correction. The space attitude of the shield tunneling machine is influenced by complex factors such as mechanical performance, operation level, geological conditions, control standards and the like, and is obtained from feedback information of monitoring data such as the splicing state of a previous ring pipe piece, the stroke of a shield tunneling machine propelling jack, a shield tail gap and the like, namely the determination of the splicing point position implementation scheme of a certain ring pipe piece is a dynamic selection process.

The position of the inner structural part in the cross section of the tunnel is fixed and cannot be changed along with the rotation of the lining circular ring. Therefore, for the structures such as pre-embedding, reservation and prefabrication adopted by a certain specific pipe block, the target position is lost under the condition of dynamically adjusting the spatial position of each pipe block, so that the effectiveness of the pipe block is difficult to guarantee. When a large number of redundant pre-embedding, reserving and prefabricating modes are adopted, the economic efficiency and the construction convenience are not paid.

Admittedly, the splicing point positions of the lining circular rings have regularity, the probability can be estimated through theoretical calculation and construction experience, and drilling and bar planting are still inevitable.

For avoiding drilling the bar planting again on assembling fashioned lining cutting pipe piece, eliminate the quality risk that drilling bar planting operation easily damaged the section of jurisdiction, improve the prefabricated assembly rate of tunnel inner structure, the utility model discloses on the technical scheme's that the cyclization was assembled to general wedge ring, fissure of displacement basis is adopted in major diameter shield tunnel, the prefabricated scheme of the tube block of taking bracket connection base and assorted assembly scheme with it is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a take prefabricated section of jurisdiction of bracket connection base to assemble lining cutting ring and assemble structure thereof, its aim at solve prefabricated section of jurisdiction that has the bracket connection base and satisfy the requirement that the fissure of displacement was assembled under, the technical problem of the rate of utilization of straight line, curved fitting and improvement same appearance tube block in the realization circuit.

The utility model discloses a realize through following technical scheme:

a prefabricated segment-assembled lining circular ring with a bracket connecting base is a lining circular ring with a double-sided wedge-shaped ring; the assembled duct pieces connected with the lining circular rings comprise top sealing blocks, adjacent blocks and standard blocks; two sides of the capping block are provided with adjacent blocks, and the rest are provided with standard blocks; the double-faced wedge-shaped ring is characterized in that the double-faced wedge-shaped ring is a symmetrical wedge; the plane projection of the lining circular ring is in an isosceles trapezoid shape; the standard block pipe piece is provided with an appearance and a connection structure, wherein the ring surfaces at two ends of the standard block pipe piece are mutually symmetrical; the assembly point position of the top sealing block is located at 0 degree of the lining circular ring, the ring width of the outer diameter of the circular ring at the assembly point position of the top sealing block is the minimum value, the standard block opposite to the top sealing block is a first standard block and is arranged symmetrically at 180 degrees, the standard blocks adjacent to the two sides of the standard block are second standard blocks, and all the standard blocks are spliced in sequence by analogy; the inner arc surfaces of the second standard block and the adjacent block are respectively provided with a bracket connecting base which is integrally formed and poured and protrudes out of the inner arc surface; the bracket connecting base is composed of connecting base planes in two directions of a horizontal plane and a vertical plane, and the horizontal plane and the vertical plane are arranged and extend along the length direction of the tunnel; the bracket connection base be in lining circular ring in the symmetric distribution four, each the bracket connection base uses Z axle, X axle and Y axle as the symmetry axis mutual symmetry, constitutes the lining circular ring is called mode 1.

The lining circular ring is characterized in that the capping block and the abutting blocks at two sides are integrally spliced and rotate 180 degrees around a Y axis, namely a longitudinal axis of a tunnel, and the capping block is positioned at a 180-degree point; the first standard block and all the standard blocks sequentially spliced with the first standard block are integrally spliced, the first standard block rotates 180 degrees around a Z axis, namely a vertical tunnel shaft, and is in mirror image position, the first standard block is symmetrically arranged at 0 degree point position, and the formed lining circular ring is called as a mode 2.

A lining cutting ring that prefabricated section of jurisdiction of taking bracket connection base assembled, wherein, mode 1 and mode 2 have the same each section of jurisdiction appearance, each section of jurisdiction respectively be top seal piece, adjacent joint piece, standard block.

A take lining cutting ring that prefabricated section of jurisdiction of bracket connection base was assembled, wherein, the ring width of the ring external diameter department of the position department is assembled to the top sealing piece is the maximum value, constitutes the lining cutting ring is called as mode 4.

The lining circular ring is characterized in that the capping block and the abutting blocks at two sides are integrally spliced and rotate 180 degrees around a Y axis, namely a longitudinal axis of a tunnel, and the capping block is positioned at a 180-degree point; the first standard block and all the standard blocks sequentially spliced with the first standard block are integrally spliced, the first standard block rotates 180 degrees around a Z axis, namely a vertical tunnel shaft, and is in mirror image position, the first standard block is symmetrically arranged at 0 degree point position, and the formed lining circular ring is called as a mode 3.

A lining cutting ring that prefabricated section of jurisdiction of taking bracket connection base assembled, wherein, mode 3 and mode 4 have the same each section of jurisdiction appearance, each section of jurisdiction respectively be top seal piece, adjacent joint piece, standard block.

A lining cutting ring that prefabricated section of jurisdiction of area bracket connection base assembled, wherein, the lining cutting ring divide into 10, is 7 standard blocks, 2 piece adjacent blocks and 1 piece block of capping respectively.

A lining cutting ring that prefabricated section of jurisdiction of taking bracket connection base was assembled, wherein, arrange embedded bar and connector structure in the inside level of bracket base, the vertically two directions for at the level to or vertical connection support member.

The utility model provides a take lining cutting ring's of prefabricated section of jurisdiction of bracket connection base structure of assembling, wherein, assemble the structure including the structure of assembling of fitting straight line or fitting curve, fitting straight line fissure of displacement assemble the structure and assemble for mode 1 and mode 2 are adjacent or mode 3 and mode 4 are adjacent, fitting curve fissure of displacement assemble the structure and assemble for mode 1 and mode 3 are adjacent or mode 2 and mode 4 are adjacent to assemble.

A take lining cutting ring's that prefabricated section of jurisdiction of bracket connection base was assembled structure of assembling, wherein, lining cutting ring assemble the order, what fix a position at first is the first standard block relative with the capping piece position, then symmetrically again, assemble second standard block, third standard block, fourth standard block adjacent with first standard block in proper order, until nth standard block, adjacent block, insert the capping piece at last.

The technical characteristics of the utility model:

(1) and the pipe block corresponding to the position of the bracket is cast together with one part of the bracket when prefabricating. And a part of the bracket poured together with the duct piece is the bracket connecting base.

(2) Pre-buried connecting reinforcement and the ware of plugging into in the bracket connection base, the remaining part of accessible this pre-buried structure and bracket is done further and is connected.

(3) Bracket connection base, protrusion in section of jurisdiction inner arc surface, assemble jointly with the section of jurisdiction, and have the connection base face of two directions, can be connected with tunnel internals on level, perpendicular two directions.

(4) The duct piece adopts the shape and the connection structure with symmetrical circular seams, so that the duct piece can be in place in a rotating mode or a mirror image turning mode in the process of assembling the duct piece into a ring.

(5) The lining circular ring is provided with two fixed splicing point positions of a top sealing block at 0 degree and +/-180 degrees.

(6) The lining circular ring divides the pipe piece into two wedge-shaped directions based on the top sealing block at the same point position to form A, B two groups of pipe block series with different shapes.

(7) The two splicing point positions and A, B two groups of pipe block series can be combined to form a four-group pipe piece splicing mode. The line central line fitting is realized by orderly connecting and combining the four groups of pipe piece assembling modes under the condition of meeting the requirement of staggered joint assembling.

The utility model discloses with prior art use general wedge ring as the most apparent difference of example to lie in: the segment prefabricated part is provided with a bracket connecting base.

The position of the bracket required to be arranged in the tunnel is fixed, so the splicing position of the special duct piece with the bracket connecting base is required to be fixed; the segment assembly ring is realized by rotating point positions to realize line fitting (see the following explanation for details); for solving the contradiction between "fixed position" and "rotatory the assembling", the utility model discloses the scheme provides one set of corresponding section of jurisdiction and assembles the combination scheme, 4 groups of mode of assembling promptly.

In order to reduce the appearance type of the duct piece as much as possible, namely, the number of the dies is reduced as much as possible, and a solution scheme that the end faces of the duct piece are symmetrical in a ring surface is provided, so that the duct piece can be rotated in place by rotating around a Y axis and can also be rotated in place by 180 degrees around a Z axis, namely a vertical axis of a tunnel, through a ZY mirror in an assembling process, and the utilization rate of the duct piece with the same appearance can be improved.

The so-called "torus symmetry" is also distinguished from the prior art. Among the prior art scheme, the anchor ring of section of jurisdiction is divided into and is met very heavy top surface, the very heavy top surface of back, and the section of jurisdiction anchor ring is asymmetric promptly, and it is directional vertically to follow the tunnel when the section of jurisdiction is assembled.

For example, the capping block is also tapered or wedged in the longitudinal direction, the ring surface with a larger area (the head-on jack surface) points to the advancing direction of the shield tunneling machine, and the ring surface with a smaller area (the back jack surface) points to the starting point direction of the shield tunneling machine.

The middle seal top block and the adjacent block of the utility model still adopt the rotating mode to be in place, namely, the middle seal top block and the adjacent block have the same direction of longitudinal insertion as the prior art; however, the ring surfaces of the other blocks, such as the standard blocks B1-B4, at the two ends are completely the same in appearance and connection structure, so that the difference between the head-on jack surface and the back jack surface is avoided, and the interchange positioning is realized in a mirror image mode according to the assembly requirement.

The so-called identical profile is realized by grooves (mainly waterproof strip pasting grooves) symmetrical to the ring surface; the identical connection structure is realized by bending a bolt. The reserved hole channel and the hand hole of the bent bolt are ring-surface symmetrical, and the inclined bolt is asymmetrical and directional.

The utility model discloses an effect:

the utility model adopts the segment form with the bracket connecting base for prefabrication, thereby avoiding drilling and bar planting on the inner arc surface of the segment, eliminating the quality risk of damaging the segment during drilling operation and eliminating the construction difficulty of inaccurate drilling and positioning of the smooth arc surface; because the connector pre-buried in the bracket base has the arrangement characteristic of being vertical to the connection base surface, the quality problems of slurry leakage and the like existing in the mode of directly pre-burying the connector in the cambered surface of the duct piece can be avoided, the pre-buried steel bars of the bracket base can be smoothly connected with the steel bars which are further connected, the force transmission is clear, and the stress is reasonable; the bracket base is provided with the embedded steel bars and the connector structure which are suitable for further horizontal or vertical connection, so that a cast-in-place mode or a prefabricated part connecting mode is conveniently adopted to form a bracket part with integrity, and the reliability of support is improved; because section of jurisdiction appearance, connected mode have the characteristic of anchor ring symmetry, have the slot external diameter and the hand hole appearance of symmetry, adopt curved bolted connection etc. like the section of jurisdiction anchor ring, make the section of jurisdiction not only the accessible rotate around Y axle (tunnel axis of ordinates), can also take one's place through the mirror image around Z axle (vertical axle in tunnel), merge and simplified section of jurisdiction appearance kind, increased the commonality of section of jurisdiction, reduced the stand cost of section of jurisdiction mould.

Drawings

FIG. 1 is a structural layout diagram of the inner functional partition of a shield traffic tunnel lining segment in the prior art,

FIG. 2 is a diagram of the internal structure of the shield traffic tunnel lining segment according to the embodiment of the present invention,

fig. 3(1) is a layout diagram of the duct piece assembly mode 1 of the present invention, and fig. 3(2) is a top view of fig. 3(1)

Fig. 4(1) a layout view of the segment assembling mode 2 of the present invention, fig. 4(2) is a top view of fig. 4(1),

fig. 5(1) is a layout diagram of a segment assembling mode 3 of the present invention, fig. 5(2) is a top view of fig. 5(1),

fig. 6(1) is a layout diagram of a segment assembling mode 4 of the present invention, fig. 6(2) is a top view of fig. 6(1),

FIG. 7(1) and (2) are respectively a big sample of the embedded steel bars and the connectors of the bracket connection base of the present invention,

description of the figure numbering:

1: and (6) lining the circular ring. 2-1: a key smoke exhaust channel layer; 2-2: a motor vehicle roadway layer; 2-3: evacuating rescue and pipeline corridor floors. 3-1: a flue plate; 3-2: a middle-speed running road plate; 3-3: a side traffic lane board. 4-1: a flue plate bracket support; 4-2: a bracket support of the running board.

5-1: a plain duct piece; 5-2: a duct piece with a bracket connecting base; 5-3: a longitudinal connecting bolt; 5-4: lining the circular ring longitudinal seam; 5-5: lining the ring surface of the ring. 6-1: a vertical plane; 6-2: a horizontal plane. 7-1: the minimum ring width at the outer diameter of the lining ring; 7-2: the maximum ring width of the outer diameter of the lining ring.

8-1: horizontally pre-burying connecting steel bars; 8-2: vertically embedding connecting steel bars; 8-3: horizontally embedding a steel bar connector; 8-4: and (5) connecting the vertical embedded steel bars. 9-1: the bracket is connected with the base; 9-2: the rest part of the bracket support can be further connected horizontally; 9-3: the remainder of the roadway panel uprights, which may be further vertically connected.

A group of pipe block serial numbers show: FA: numbering the segment capping blocks; L1A, L2A: numbering adjacent segments of the duct pieces; B1A, B2A, B3A, B4A: and numbering the pipe piece standard blocks.

B group pipe block serial number description: FB: numbering the segment capping blocks; L1B, L2B: numbering adjacent segments of the duct pieces; B1B, B2B, B3B, B4B: and numbering the pipe piece standard blocks.

The coordinate system conforms to a Cartesian right-hand coordinate system, the Y axis points to the paper surface, the Y axis is a longitudinal axis of the tunnel, the Z axis is a vertical axis of the tunnel, and X, Z in each figure represents the X axis and the Z axis;

Detailed Description

Referring to fig. 3(1) - (6) (2), the lining ring with the bracket connecting base is prefabricated and assembled by the duct pieces, and the lining ring 1 is a lining ring with a double-faced wedge-shaped ring; the assembled duct pieces connected with the lining circular rings comprise top sealing blocks, adjacent blocks and standard blocks; two sides of the capping block are provided with adjacent blocks, and the rest are provided with standard blocks; the double-sided wedge-shaped ring is a symmetrical wedge; the plane projection of the lining circular ring is in an isosceles trapezoid shape; the standard block pipe piece is provided with an appearance and a connection structure, wherein the ring surfaces at two ends of the standard block pipe piece are mutually symmetrical;

fig. 3(1) to 4(2) show a lining ring structure formed by connecting a group a of pipe blocks, in which fig. 3(1) shows a first mode, and fig. 4(1) shows a second mode, and (2) shows a second mode;

fig. 5(1) to 6(2) show a lining ring structure formed by connecting a group B of pipe blocks, in which fig. 5(1) shows a mode three, and fig. 6(1) (2) shows a mode four;

fig. 3(1), (2) when the assembly point of the top-sealing block (see number FA in the figure) is located at 0 ° of the lining circular ring, the ring width at the outer diameter of the circular ring at the assembly point of the top-sealing block is the minimum (see number 7-1 in the figure), the standard block opposite to the top-sealing block is the first standard block (see number B4A in the figure), the standard block is symmetrically located at 180 ° of the point, the standard block adjacent to both sides of the standard block is the second standard block (see number B3A in the figure), and all the standard blocks are spliced in this order; the inner arc surfaces of the second standard block and the adjacent block (see the numbers L2A and L1A in the figure) are respectively provided with a bracket connecting base which is integrally formed and poured and protrudes out of the inner arc surfaces; the bracket connecting base is composed of connecting base planes in two directions of a horizontal plane 6-2 and a vertical plane 6-1, and the horizontal plane and the vertical plane are arranged and extend along the length direction of the tunnel; the bracket connection base be in lining circular ring in the symmetric distribution four, each the bracket connection base uses Z axle, X axle and Y axle as the symmetry axis mutual symmetry, constitutes the lining circular ring is called mode 1.

Fig. 3(1), (2) illustrates a segment-assembled lining ring prefabricated with a corbel connecting base, wherein the capping block and the two side abutting blocks are integrally spliced and rotated 180 degrees around the Y axis, namely the longitudinal axis of the tunnel, and the capping block is positioned at a 180-degree point; the first standard block and all the standard blocks sequentially spliced with the first standard block are integrally spliced, the first standard block rotates 180 degrees around a Z axis, namely a vertical shaft of the tunnel and is in mirror image position, the first standard block is symmetrically arranged at a point position of 0 degree, and the formed lining circular ring is called as a mode 2, and is shown in (4), (1) and (2).

A lining cutting ring that prefabricated section of jurisdiction of taking bracket connection base assembled, wherein, mode 1 and mode 2 have the same each section of jurisdiction appearance, each section of jurisdiction respectively be top seal piece, adjacent joint piece, standard block.

The lining ring assembled by the prefabricated pipe pieces with the bracket connecting base is shown in figure 6(1) and (2), wherein the ring width at the outer diameter of the ring at the assembling point of the capping block is the maximum value (shown as the number 7-2), and the formed lining ring is referred to as a pattern 4, and is shown in figure 6(1) and (2).

Fig. 6(1), (2) illustrates a segment-assembled lining ring prefabricated with bracket connection bases, in which the capping blocks (see reference number FB) and the abutting blocks at both sides (see reference numbers L2B and L1B) are integrally spliced and rotated by 180 ° around the Y-axis, i.e., the longitudinal axis of the tunnel, and the capping blocks are located at 180 ° points; the first standard block (see the number B4B in the figure) and all the standard blocks spliced with the first standard block in sequence are rotated by 180 degrees around the Z axis, namely the vertical axis of the tunnel, and are mirrored in place, the first standard block is arranged symmetrically at the 0 degree point, and the formed lining circular ring is referred to as a mode 3, see figure 5(1) (2).

A lining cutting ring that prefabricated section of jurisdiction of taking bracket connection base assembled, wherein, mode 3 and mode 4 have the same each section of jurisdiction appearance, each section of jurisdiction respectively be top seal piece, adjacent joint piece, standard block.

Preferentially, a take lining cutting ring that prefabricated section of jurisdiction of bracket connection base was assembled, wherein, the lining cutting ring divide into 10, is 7 standard blocks, 2 piece adjacent blocks and 1 piece capping piece respectively.

The lining circular ring with the bracket connecting base and prefabricated segment assembling is shown in figure 7, (1) and (2), wherein embedded steel bars and connector structures are arranged in the bracket base in the horizontal and vertical directions (8-1: horizontal embedded steel bars; 8-2: vertical embedded steel bars; 8-3: horizontal embedded steel bar connectors; 8-4: vertical embedded steel bar connectors) and used for connecting supporting members in the horizontal or vertical direction (9-1: the bracket connecting base; 9-2: the rest part of a bracket support capable of being further connected in the horizontal direction; and 9-3: the rest part of a roadway plate stand column capable of being further connected in the vertical direction).

The utility model provides a take lining cutting ring's of prefabricated section of jurisdiction of bracket connection base structure of assembling, the structure of assembling including the structure of assembling of fitting straight line or fitting curve, fitting straight line fissure of displacement assemble the structure and assemble for mode 1 and mode 2 are adjacent or mode 3 and mode 4 are adjacent, fitting curve fissure of displacement assemble the structure and assemble for mode 1 and mode 3 are adjacent or mode 2 and mode 4 are adjacent to assemble.

A take lining cutting ring's that prefabricated section of jurisdiction of bracket connection base was assembled structure of assembling, wherein, lining cutting ring assemble, the first standard block that is relative with the capping piece position of location at first, then symmetrically again, assemble second standard block, third standard block, fourth standard block adjacent with first standard block in proper order, until nth standard block, adjacent block, insert the capping piece at last.

The utility model discloses a four group's section of jurisdiction are assembled the mode characteristic and are explained as follows:

fig. 3(1), fig. 4(1), fig. 5(1), fig. 6(1) are cross-sectional views of the tunnel lining segment, fig. 3(2), fig. 4(2), fig. 5(2), fig. 6(2) are plan projections corresponding to fig. 3(1), fig. 4(1), fig. 5(1), fig. 6(1), respectively, fig. 7-1 is the minimum value of the ring width, and fig. 7-2 is the maximum value of the ring width.

Mode 1: referring to fig. 3(1), the splicing point of the capping block is located at 0 degree, and the ring width at the outer diameter of the ring at the point is the minimum value; see FIG. 3(2) minimum ring width 7-1 at outer diameter of lining ring;

mode 2: FIG. 4(1) shows the joining point of the capping blocks at + -180 degrees, and the ring width at the outer diameter of the ring at this point is the minimum; see FIG. 4(2) minimum ring width 7-1 at outer diameter of lining ring;

mode 3: FIG. 5(1) shows the joining point of the capping blocks at + -180 DEG, and the maximum ring width at the outer diameter of the ring at this point; see figure 5(2) maximum ring width 7-2 at the outer diameter of the lining ring,

mode 4: FIG. 6(1) the block assembly point is at 0 and the ring width at the outer diameter of the ring at that point is at its maximum. See FIG. 6(2) maximum ring width 7-2 at the outer diameter of the lining ring.

When the ring width at the outer diameter of the ring at the splicing point position of the capping blocks is the minimum value, namely the mode 1 or 2, the wedge-shaped lining ring is in the shape of A group of pipe block series; and when the ring width of the outer diameter position of the ring at the assembling point position of the capping block is the maximum value, namely the mode 3 or the mode 4, the shape of the wedge-shaped lining ring is a B group pipe block series, and the suffix A, B is omitted for the simplicity of description in the following serial numbers of the A group pipe block series and the B group pipe block series.

When the assembly is carried out, a first standard block B4 opposite to the position of a capping block F is firstly positioned, see the block B4 in a segment assembly mode layout chart in fig. 3(1) -6(2), then a second standard block B3, a third standard block B2, a fourth standard block B1, an adjoining block two L2 and an adjoining block one L1 which are adjacent to the first standard block B4 are symmetrically and sequentially assembled, and finally the capping block F is inserted.

If the pipe blocks located before the capping block are influenced by respective gravity when the capping block is located at the arch bottom, position deviation and accumulated deviation exist, so that the space left for the capping block to be located in the position is smaller than the outer contour of the capping block, the capping block cannot be located in the position, and the lining circular ring cannot be closed into a whole ring. When the counter force of the jack is increased and the jack is inserted forcibly, the stress on the contact surface of the pipe piece is over-limited, so that the concrete is cracked and damaged. Therefore, unless special conditions are met, if correction is necessary, assembly of the seal top block at a point below the horizontal line is avoided.

As described above, the present invention designs the 4 sets of modes for two purposes. Firstly, the fitting of the tunnel lining circular ring to a flat curve and the requirement of adjusting the posture of the shield tunneling machine (namely deviation correction) are realized through the splicing combination of all modes. If the method is simpler, straight lines and curves can be fitted through the splicing combination of all modes, even if errors possibly occurring in actual construction are ignored, accurate positioning can be performed in the construction; and secondly, the requirement of staggered joint assembly is met.

If the requirement of staggered joint assembly is not considered, only the mode 1 and the mode 2 are adopted, or only the mode 3 and the mode 4 are adopted, and straight line or curve fitting can be realized, and the principle is detailed in the above.

To use only mode 1 and mode 2, for example, as follows:

when the longitudinal assembling and combining mode is as follows: … + mode 1+ …, the tunnel turns to the right (the forward direction is upward in the figure, the same goes downward); … + mode 2+ …, the tunnel turns to the left; … + mode 1+ mode 2+ …, then the tunnel remains straight.

When the combination mode is adopted, the requirement of staggered joint assembly is not met, namely the mode 1+ the mode 1 are through joint. For this reason, mode 3 is supplemented. When … + mode 1+ mode 3+ … is adopted, the tunnel section is also steered towards the right side, and staggered joint assembly is realized.

The combination of mode 2 and mode 4, and the same, will not be described again.

The patterns 1 and 2 have the same segment shape; patterns 3, 4 have the same segment profile.

Based on the principle and the design thought, 4 groups of assembly modes are used respectively, and the functions are realized through the combination of the 4 groups of assembly modes.

The utility model discloses the scheme increases one set of section of jurisdiction that has different appearances in addition, replenishes two kinds of section of jurisdiction and assembles the position (mode promptly), is exactly for making to have the bracket base, and this pipe billet that has special appearance is put relatively fixed in the lining cutting ring who assembles the shaping. The position of the inner structure of the tunnel is fixed and can not be changed due to the rotation of the splicing point position of the lining circular ring.

The capping block (FA) and the first and second adjacent blocks (L1A, L2A) are positioned by rotating 180 ° around the Y axis (longitudinal axis of the tunnel), and the standard blocks (B1A, B2A, B3A, B4A) are positioned by mirroring around the Z axis (vertical axis of the tunnel), so as to realize the conversion between mode 1 and mode 2.

Similarly, the capping block (FB) and the first and second adjacent blocks (L1B, L2B) are positioned by rotating 180 ° about the Y axis (longitudinal axis of the tunnel), and the standard blocks (B1B, B2B, B3B, B4B) are positioned by mirroring about the Z axis (vertical axis of the tunnel), so as to realize the conversion between mode 3 and mode 4.

In order to avoid the occurrence of through seams, the splicing mode 1 is not adjacent to the mode 4, and the splicing mode 2 is not adjacent to the mode 3.

Is to realize the staggered assembly. Pattern 4 is adjacent to pattern 1 and fits a straight line, but a through seam occurs. When a straight line needs to be fitted, the mode 2 and the mode 1 can be adjacent; when a curve needs to be fitted, the mode 3 can be adjacent to the mode 1; if mode 1 is adjacent to mode 1, although the curve can be fitted, a through seam will appear.

Based on the appearance and the splicing structure of the prefabricated duct piece, the position of the bracket base prefabricated together with the duct piece can be relatively fixed, and a foundation is laid for further connection of bracket parts; based on the embedded steel bars and the connector structure which are arranged in two mutually perpendicular directions in the bracket base, the supporting component can be further connected horizontally or vertically.

The invention is further explained below:

the tunnel structure built by the shield method is a circular ring type lining structure formed by sequentially assembling a plurality of prefabricated pipe pieces into a ring. The term "capping block" refers to the last segment assembled in place in the assembly sequence, and after the capping block is in place, the lining structure forms a complete and closed ring. It is generally believed that the capping blocks are located at the dome of the ring to provide greater control over the quality of the splice. Thus, the term "capping block" has been developed and continues.

It can also be understood that building capping, which represents the completion of the civil work of the main structure, is a symbolic event.

With the development of the technology, especially the appearance of the general wedge-shaped ring lining type and the application of a large number of engineering practices, the position of the top sealing block is not limited to the position of the vault (or the position near the vault), the top sealing block can be flexibly arranged according to the requirements of tunnel horizontal and longitudinal fitting, posture correction and staggered joint assembly, and the top sealing block can be arranged at any reasonable assembly point position of the ring, such as the arch bottom, the arch shoulder, the arch waist and the like. In the engineering, the top sealing block is still prevented from appearing at the assembling position of the arch bottom as much as possible. Thus, a "capping block" may also be referred to as a "K block" (in the sense of Key), a "Key Block", etc., and the term "capping block" is more general. The capping block, apart from the wedge-shaped annular surface, has a particular profile due to the longitudinal wedge-shape (or taper in the longitudinal direction of the tunnel) required for longitudinal insertion. The adjacent tube blocks are called "adjacent blocks" (two blocks), and the rest tube blocks are called "standard blocks".

The wedge-shaped ring is a ring surface of a lining circular ring (a whole ring after assembly is finished), is an inclined surface, and has a trapezoidal plane projection. Because the end face of the lining circular ring is provided with the plane wedge, when all the lining circular rings are longitudinally connected, namely the ring surface is closely attached to the ring surface, the formed cylindrical structure (tunnel) can be fitted with a plane curve and the shield posture is adjusted (namely the deviation is corrected). If the end face of the lining circular ring does not have an inclined ring surface and all the lining circular rings have the same width, the lining circular rings can only be assembled to form a straight line.

The wedge amount is the difference between the maximum width and the minimum width of the lining ring. The engineering usually adopts a double-faced wedge-shaped mode. See detail in FIG. 3(2), FIG. 4(2), FIG. 5(2), FIG. 6(2) and FIGS. 7-1 and 7-2 in the top view.

The universal wedge-shaped lining ring is a lining ring which can realize curve fitting only by applying prefabricated components produced by a set of prefabricated pipe sheet die through reasonable longitudinal seam division, namely block division and combining the prefabricated components in a mode of rotating and assembling point positions.

The universal wedge-shaped lining circular ring has two standard splicing point positions, and the top sealing blocks are positioned at the arch waist positions and are respectively at the horizontal positions of 0 degree and 180 degrees.

In the modes 1 and 3, when the capping block is positioned at 0 ° or 180 °, the minimum ring width of the entire ring is positioned at 0 ° and the maximum ring width is positioned at 180 °; in modes 2 and 4, when the capping block is located at 180 ° or 0 °, the minimum ring width of the entire ring is located at 180 ° and the maximum ring width is located at 0 °.

It should be noted that when we describe the assembly position of the wedge-shaped lining ring, we usually say that only the capping block is at a certain point. This is not to illustrate, and only the capping blocks determine the control position of the wedge ring, but rather the positioning of the capping blocks is representative of the placement of the segments of the full ring. I.e., the capping block location, is a location symbol.

The basic principle of realizing the assembly of straight lines and flat curves by combining wedge-shaped lining circular rings is as follows: when the lining rings are continuously assembled along the longitudinal direction (i.e. the axial direction of the tunnel), as seen from a plane projection, because the lining rings are wedge-shaped, the normal direction of the ring surface of the lining ring points to the axial direction of the tunnel, but is not parallel to the axial direction of the tunnel, and has a slight and fixed deflection angle with the axial direction of the tunnel, as shown in a mode 1 in fig. 3(2), the 0-degree direction of the tunnel lining structure is the minimum ring width, and the 180-degree direction of the tunnel lining structure is the maximum ring width. If the next ring next to the ring is close to, the splicing point position of the mode 1 is continuously adopted, similarly, the minimum ring width of the tunnel lining structure is located in the direction of 0 degree, the maximum ring width of the tunnel lining structure is located in the direction of 180 degrees, and the normal direction of the assembled end face and the axial direction of the tunnel further have a tiny and fixed deflection angle; …, respectively; the rotation of the axis of the lining structure is realized by the circulation.

The wedge-shaped amount (indicated by symbol Δ) of the wedge-shaped ring is set symmetrically to the axis of the circular ring, and the ring width at the axis is the standard ring width (indicated by symbol B), so that the maximum ring width Bmax is B + Δ/2, and the minimum ring width Bmin is B- Δ/2. Taking a standard ring width of 2m as an example, the wedge-shaped ring fits the tunnel axis, namely, a short straight line with a longitudinal step length of 2m is adopted, a target curve is continuously approached and fitted, and errors between the short straight line and the target curve (namely, a tunnel line, including a straight line, a flat curve, a gentle curve and a combination thereof) are controlled within a standard allowable range by selecting different assembly point positions and combinations thereof.

When the track traffic interval tunnel is built by adopting a shield method, the adopted lining circular ring mode is a straight line ring and a left-right turning ring, and the straight line ring is an equal-width ring and the left-right turning ring is a wedge-shaped ring, which is different from the general wedge-shaped lining circular ring, so that the position of the top sealing block can be basically ensured to be positioned at the vault and near the vault; the defect is that the straight line ring, the left turning ring and the right turning ring respectively adopt 3 sets of moulds with different shapes, but the defect also has acceptable economy after the demand of the prefabricated parts reaches a certain scale, after all, each set of mould also has service life, and the number of the prefabricated parts which can be produced is limited.

And the universal wedge-shaped lining circular ring is returned, because the idea of only applying 1 set of die is adopted, joint separation and assembly point positions of the pipe blocks are necessarily required, and after the pipe blocks are rotated by 180 degrees, the requirement of joint staggering assembly is still met, and meanwhile, the capability of fitting straight lines and curves is realized. Therefore, it is preferable that the capping block is located at a horizontal line position, i.e., a hunch position. Otherwise, the capping block is not located at the horizontal line position, but appears at a certain point above the horizontal line, and after rotating 180 degrees, the capping block inevitably appears at a corresponding position below the horizontal line, which is a point which is not favorable for the capping block to be assembled into a position smoothly and is to be avoided by exerting force.

Examples

The utility model provides a take prefabricated section of jurisdiction appearance of bracket connection base, structure and assemble the structure, applicable in having flue plate, driving plate or other inside supporting member, the connection structure of figure 2 is seen to the condition that needs and the lining cutting structure of assembling prefabricated section of jurisdiction formation and carrying out the connection.

The above explanation with reference to the drawings is only one of the application examples listed for explaining the intention, principle and structure of the present invention, for example, the lining ring is divided into 10 blocks, which are 7 standard blocks, 2 adjacent blocks and 1 capping block respectively; the segments of the duct piece are connected in the circumferential direction by inclined bolts; the pipe rings are longitudinally connected by 28 or 28 groups of bent bolts which are circumferentially and uniformly distributed; the lining circular ring is in a double-sided wedge shape; the internal components are arranged into a single-layer traffic lane provided with an important discharge flue; adopt cast-in-place mode further to form flue board bracket support, adopt cast-in-place mode or connect prefabricated component mode further to form characteristics such as driving plate stand, be not used for the restriction the utility model discloses.

For the engineer skilled in the art, it can still modify the technical solution described in the listed examples or make equivalent replacement for part of the technical features, but any modification, equivalent replacement, improvement and the like made within the intention, principle and structure of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A prefabricated segment-assembled lining circular ring with a bracket connecting base is a lining circular ring with a double-sided wedge-shaped ring; the assembled duct pieces connected with the lining circular rings comprise top sealing blocks, adjacent blocks and standard blocks; two sides of the capping block are provided with adjacent blocks, and the rest are provided with standard blocks; the double-faced wedge-shaped ring is characterized in that the double-faced wedge-shaped ring is a symmetrical wedge; the plane projection of the lining circular ring is in an isosceles trapezoid shape; the standard block pipe piece is provided with an appearance and a connection structure, wherein the ring surfaces at two ends of the standard block pipe piece are mutually symmetrical; the assembly point position of the top sealing block is located at 0 degree of the lining circular ring, the ring width of the outer diameter of the circular ring at the assembly point position of the top sealing block is the minimum value, the standard block opposite to the top sealing block is a first standard block and is arranged symmetrically at 180 degrees, the standard blocks adjacent to the two sides of the standard block are second standard blocks, and all the standard blocks are spliced in sequence by analogy; the inner arc surfaces of the second standard block and the adjacent block are respectively provided with a bracket connecting base which is integrally formed and poured and protrudes out of the inner arc surface; the bracket connecting base is composed of connecting base planes in two directions of a horizontal plane and a vertical plane, and the horizontal plane and the vertical plane are arranged and extend along the length direction of the tunnel; the bracket connection base be in lining circular ring in the symmetric distribution four, each the bracket connection base uses Z axle, X axle and Y axle as the symmetry axis mutual symmetry, constitutes the lining circular ring is called mode 1.

2. The prefabricated segment-assembled lining ring with the bracket connecting base as claimed in claim 1, wherein the capping block and the abutting blocks at two sides are integrally spliced and rotated 180 degrees around the Y axis, namely the longitudinal axis of the tunnel, to be positioned, and the capping block is positioned at a 180-degree point; the first standard block and all the standard blocks sequentially spliced with the first standard block are integrally spliced, the first standard block rotates 180 degrees around a Z axis, namely a vertical tunnel shaft, and is in mirror image position, the first standard block is symmetrically arranged at 0 degree point position, and the formed lining circular ring is called as a mode 2.

3. The prefabricated segment-assembled lining ring with the bracket connecting base as claimed in claim 2, wherein the pattern 1 and the pattern 2 have the same shape of each segment, and each segment is a capping block, an adjacent block and a standard block.

4. The prefabricated segment-assembled lining ring with the bracket connecting base as claimed in claim 1, wherein the ring width of the ring outer diameter at the assembling point of the top sealing block is the maximum value, and the formed lining ring is called as mode 4.

5. The prefabricated segment-assembled lining ring with the bracket connecting base as claimed in claim 4, wherein the capping block and the abutting blocks at two sides are integrally spliced and rotated 180 degrees around the Y axis, namely the longitudinal axis of the tunnel, to be positioned, and the capping block is positioned at a 180-degree point; the first standard block and all the standard blocks sequentially spliced with the first standard block are integrally spliced, the first standard block rotates 180 degrees around a Z axis, namely a vertical tunnel shaft, and is in mirror image position, the first standard block is symmetrically arranged at 0 degree point position, and the formed lining circular ring is called as a mode 3.

6. The prefabricated segment-assembled lining ring with the bracket connecting base as claimed in claim 5, wherein the patterns 3 and 4 have the same shapes of the segments, and the segments are respectively a capping block, an adjacent block and a standard block.

7. The prefabricated segment-assembled lining ring with the bracket connecting base as claimed in claim 1, wherein the lining ring is divided into 10 blocks, namely 7 standard blocks, 2 adjacent blocks and 1 capping block.

8. The prefabricated segment-assembled lining ring with the bracket connection base as claimed in claim 1, wherein embedded steel bars and connector structures are arranged in the bracket connection base in the horizontal and vertical directions for connecting the supporting members in the horizontal direction or the vertical direction.

9. The utility model provides a take lining cutting ring's of prefabricated section of jurisdiction of bracket connection base structure of assembling, a serial communication port, assemble the structure and include the structure of assembling of fitting straight line or fitting curve, the fissure of displacement the structure of assembling of fitting straight line for mode 1 and mode 2 adjacent or mode 3 and mode 4 adjacent assemble, the fissure of displacement the structure of assembling of fitting curve for mode 1 and mode 3 adjacent or mode 2 and mode 4 adjacent assemble.

10. The assembled structure of a lining ring assembled by prefabricated segments with bracket connection bases as claimed in claim 9, wherein the lining ring assembly sequence is to position a first standard block opposite to the position of the capping block first, and then symmetrically and sequentially assemble a second standard block, a third standard block, a fourth standard block, a standard block up to the nth standard block, an adjacent block and finally insert the capping block.

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