CN111706340B - Shield tail brush convenient to replace and method for replacing shield tail brush under long-distance non-reinforced working condition - Google Patents
Shield tail brush convenient to replace and method for replacing shield tail brush under long-distance non-reinforced working condition Download PDFInfo
- Publication number
- CN111706340B CN111706340B CN202010540567.3A CN202010540567A CN111706340B CN 111706340 B CN111706340 B CN 111706340B CN 202010540567 A CN202010540567 A CN 202010540567A CN 111706340 B CN111706340 B CN 111706340B
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- shield tail
- tail brush
- shield
- brush
- steel structure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0635—Tail sealing means, e.g. used as end shuttering
Abstract
The invention provides a shield tail brush convenient to replace and a method for replacing the shield tail brush under a long-distance non-reinforced working condition. The shield tail brush is an annular shield tail brush formed by splicing a plurality of shield tail brush components, and each shield tail brush component comprises at least three arc-shaped shield tail brush installation ring pieces arranged in parallel and a sliding rod for connecting the at least three shield tail brush installation ring pieces. When the novel shield tail brush is installed, the novel shield tail brush is installed on the outer ring surface of a steel structure segment through a spring bolt adjusting structure, the novel shield tail brush is communicated with the steel structure segment to be assembled together, then the original shield tail brush is firstly removed through a removing opening in the steel structure segment in the tunneling process, the novel shield tail brush is moved to the installation position of the shield tail brush in the tunneling process, and the novel shield tail brush is installed in place through the installation opening in the steel structure segment. The invention realizes the replacement of the shield tail brush in the shield tunneling process, and stratum strengthening measures are not needed in the shield tail brush replacement process, thereby reducing the construction difficulty, shortening the construction period and saving the economic cost.
Description
Technical Field
The invention belongs to the field of shield construction, and particularly relates to a shield tail brush convenient to replace and a method for replacing the shield tail brush under a long-distance non-reinforced working condition.
Background
With the large-scale development of subway construction in China, the shield construction method is widely used in underground excavation room construction in subway areas due to the characteristics of safety, rapidness, wide adaptability and the like. The shield tail brush of the shield machine is positioned at the tail part of the shield host machine, is generally formed by fluffy steel wire bending back, can be in close contact with the duct piece, mainly plays a role in preventing water, mud and the like from flowing into the inside of the shield along the back part of the duct piece, and is a key sealing facility for preventing the shield tail from generating sand gushing and mud gushing. 2 sealed chambeies are constituteed to 3 sealed brushes of shield tail brush, and chamber between the shield tail brush is through pouring into shield tail sealing grease into, guarantees that the section of jurisdiction synchronous slip casting behind one's back thick liquid and mud can not spill from the clearance between section of jurisdiction and the shield structure machine, prevents simultaneously that groundwater from leaking to the shield structure built-in, if shield tail sealing performance is bad, can cause adverse effect to the shield construction under this condition, can have huge construction risk when the condition is serious.
In the shield tunnel construction process, inevitable wearing and tearing take place between shield tail brush and the shield tunnel, when shield tail brush wearing and tearing to certain extent, will lead to the shield tail to take place the percolating water, leak the silt even, so in case discover shield tail brush great extensive damage, just need in time must change shield tail brush according to the condition in stratum. Particularly, when the shield machine passes through a sandy soil or pebble stratum rich in water for a long distance, because the control of the tunneling process is poor or the self quality and the welding installation of the tail brush do not reach the standard, certain point positions or integral abrasion transition of the shield tail brush is more easily caused, the water and slurry stopping effects are not achieved, the construction risk is brought, and the shield machine is faced to be positioned in the stratum to replace the shield tail brush. In the process of disassembling the old shield tail brush and installing the new shield tail brush, certain reinforcement measures are often needed from the face of the cutter to the integral area of the duct piece behind the shield tail due to the instability of the stratum, so that the construction risk can be reduced. The existing reinforcement measures mainly comprise that the stratum around the shield tail is frozen or waterproof materials are adopted to perform grouting seepage prevention in the stratum at the shield tail part, the modes have the defects of long construction period, heavy task, high investment and the like in the construction process, when the construction stratum condition is complex, the engineering difficulty is higher, and even a plurality of special stratums do not have the reinforcement condition. And because the shield tail brush on the existing shield machine is directly welded on the inner side of the shield shell tail, when the shield machine is replaced, all the old shield tail brushes need to be planed, and then new shield tail brushes need to be welded. Because the space in the tunnel is smaller, planing and brushing and replacing are very inconvenient, potential safety hazards exist in welding in the tunnel, and the disassembly of the old shield tail brush and the installation of the new shield tail brush in the replacement process are complex, time-consuming, labor-consuming and low in efficiency.
Disclosure of Invention
The invention provides a shield tail brush convenient to replace and a method for replacing the shield tail brush under a long-distance non-reinforcement working condition, aiming at the problems in the prior art, the shield tail brush can realize the simultaneous replacement of a plurality of shield tail brushes in the shield tunneling process, the replacement process is simple and controllable, and no reinforcement measure is needed in the replacement process of the shield tail brush, so that the shield tail gushing water and sand gushing risk can be avoided, the construction difficulty is reduced, and the construction period is shortened.
In order to solve the technical problems, the invention provides a shield tail brush convenient to replace, wherein the shield tail brush is an annular shield tail brush formed by splicing a plurality of shield tail brush components, each shield tail brush component comprises at least three arc-shaped shield tail brush mounting ring pieces arranged in parallel and a sliding rod for connecting the at least three shield tail brush mounting ring pieces, a shield tail brush is welded on the inner ring surface of each shield tail brush mounting ring piece, a plurality of mounting holes are formed in each shield tail brush mounting ring piece, and the sliding rod is mounted on the outer ring surfaces of the at least three shield tail brush mounting ring pieces; the position correspondence of installing the shield tail brush at shield tail shell inner wall is equipped with spout and a plurality of bolt mounting groove, when the shield constructs the machine and advances to the position of shield tail shell installation shield tail brush and arrange the steel construction section of jurisdiction outside in, every shield tail brush subassembly slides in the spout that shield tail shell inner wall corresponds through its slide bar respectively, the mounting hole on every shield tail brush installation segment corresponds with the bolt mounting groove of shield tail shell inner wall to fix shield tail brush installation segment at shield tail shell inner wall through fastening bolt.
The further technical scheme of the invention is as follows: the shield tail brush also comprises a steel structure pipe piece matched with the shield tail brush during installation, and a new shield tail brush bolt installation opening and an original shield tail brush bolt installation opening are formed in the steel structure pipe piece; when the shield tail brush is replaced, a single shield tail brush assembly of the new shield tail brush is arranged on the outer ring surface of the single steel structure segment through a spring bolt adjusting structure, and a bolt mounting hole of the new shield tail brush on the segment corresponds to a mounting hole on each shield tail brush mounting ring piece of the new shield tail brush; the steel structure segments are spliced into a complete shield ring segment by a segment splicing machine of the shield machine, and after a plurality of steel structure segments are spliced into a ring shape, shield tail brush mounting ring segments arranged on the outer ring surface of the steel structure segments are correspondingly connected to form at least three ring-shaped shield tail brushes; when the shield machine advances to the position of the shield tail shell for installing the shield tail brush, the shield tail brush is arranged on the outer side of the steel structure pipe piece, the fastening bolts are installed in the corresponding installation holes and the bolt installation grooves through the installation ports in the steel structure pipe piece, and the fastening bolts are screwed up to fix the shield tail brush assembly on the inner wall of the shield tail shell.
The invention has the following excellent technical scheme: one end of the sliding rod is arc-shaped, the other end of the sliding rod is provided with a clamping groove, an inlet of the sliding chute is a splayed enlarged opening, and the tail end of the sliding chute is correspondingly provided with an elastic clamping piece; the contact surface of the sliding rod and the sliding groove is an arc surface or is provided with a plurality of sliding balls
The invention has the following excellent technical scheme: each shield tail brush assembly is provided with three shield tail brush mounting ring pieces and two sliding rods which are parallel to each other, the shield tail brush intervals on the three shield tail brush mounting ring pieces are equal, the two sliding rods are symmetrically mounted on the outer ring surfaces of the three shield tail brush mounting ring pieces in a bolt or welding mode, when the sliding rods are embedded into corresponding sliding grooves, the outer ring surface of each shield tail brush mounting ring piece is in contact with the inner wall of a shield tail shell, and a sealing gasket is arranged at the position, not in contact with the sliding rods, of the outer ring surface of each shield tail brush mounting ring piece; the shield tail brush mounting ring piece is divided into a shield tail brush welding area and a mounting area, the shield tail brush welding area and the mounting area are annular areas which are parallel to each other, and the mounting holes are distributed circumferentially along the shield tail brush mounting ring piece mounting area; three rows of new shield tail brush bolt mounting openings are correspondingly formed in the steel structure pipe piece, and a row of original shield tail brush bolt dismounting openings are formed in one end, close to the shield tail, of the steel structure pipe piece; the mounting hole is a strip-shaped mounting hole and is formed in the part, not connected with the sliding rod, of the shield tail brush mounting ring sheet; the shape of the new shield tail brush bolt mounting opening and the shape of the original shield tail brush bolt dismounting opening are the same as the mounting holes, and the area of the new shield tail brush bolt mounting opening and the area of the original shield tail brush bolt dismounting opening are larger than or equal to the area of the mounting holes.
The invention has the following excellent technical scheme: the spring bolt adjusting structure comprises an adjusting hole formed in the steel structure pipe piece, a screw rod fixing groove correspondingly formed in the sliding rod, a spring ring and an adjusting screw rod, wherein the spring ring and the adjusting screw rod are installed in the adjusting hole; and the spring ring vertically extends to the inner wall of the shield shell in a non-pressure state.
The invention has the following excellent technical scheme: be equipped with roll adjustment structure on the shield tail brush installation segment in the middle, the roll adjustment structure includes along the adjustment rack of shield tail brush installation segment annular distribution and with the adjusting gear of adjusting rack intermeshing the two concatenation ends of shield tail brush installation segment are equipped with the concatenation inclined plane of mutual matching.
The invention provides a method for replacing a shield tail brush under a long-distance non-reinforced working condition, which is characterized in that the structure of the new shield tail brush is completely the same as that of the original shield tail brush, each shield tail brush component forming the shield tail brush is provided with three shield tail brush mounting ring pieces, shield tunneling is stopped when the original shield tail brush is found to be damaged and needs to be replaced in the shield tunneling process, and a steel structure duct piece provided with a new shield tail brush bolt mounting port, an original shield tail brush bolt dismounting port and a new shield tail brush mounting adjusting hole is adopted to replace the original shield duct piece for duct piece assembling and tunneling processes, wherein the specific replacement steps are as follows:
(1) before the steel structure duct pieces are transported and assembled, a single shield tail brush component of a new shield tail brush is installed on the outer ring surface of each steel structure duct piece through a spring bolt adjusting structure, and the height of the shield tail brush component is adjusted in the installation process, so that the installation of the steel structure duct pieces is not influenced, and the shield tail brush component does not contact and rub with a shield tail shell; then, sealing the new shield tail brush bolt mounting opening and the original shield tail brush bolt dismounting opening on the steel structure segment by using a sealing cover;
(2) hoisting and transporting the steel structure duct pieces carrying the shield tail brush assembly in a shield tail area, starting shield tunneling to a steel ring splicing position, and splicing the steel structure duct pieces one by using a shield tunneling machine splicing machine system;
(3) after the steel structure duct piece is assembled, sealing the tail of the steel structure duct piece by adopting a lateral wing steel plate and a seam steel plate, and starting a first front cavity pressing test through a vent hole and a pressure measuring hole in the steel structure duct piece;
(4) after the steel structure segment is assembled, the shield tunneling machine continues tunneling, an original shield tail brush bolt removing opening on the steel structure segment is opened, the oil cylinder stroke is pushed to the position where the original shield tail brush bolt removing opening of the steel structure segment is opposite to a first row of bolts of an original shield tail brush, tunneling is stopped, a bolt removing tool penetrates through the original shield tail brush bolt removing opening to sequentially remove the first row of bolts of the original shield tail brush, meanwhile, a pushing rope is connected to the original shield tail brush, and the pushing rope penetrates through the inner side of the steel structure segment from the original shield tail brush bolt removing opening on the steel structure segment to be fixed; continuing to dig until the bolt removing opening of the original shield tail brush of the steel structure duct piece is opposite to the second row of bolts of the original shield tail brush, stopping digging, sequentially removing the second row of bolts of the original shield tail brush, and ensuring that the free end of the pushing rope is arranged on the inner side of the steel structure duct piece; meanwhile, the height of the new shield tail brush is adjusted, so that the sliding rod of the new shield tail brush is in butt joint with the inlet of the sliding chute;
(5) the shield machine continues to drive forwards to the third row of bolts of the original shield tail brush, the driving is stopped, the third row of bolts of the original shield tail brush are sequentially removed, the original shield tail brush is disconnected with the shield tail shell, the pushing rope starts to be tightened, the original shield tail brush is driven to move to a second bolt hole of the original shield tail brush along a sliding groove in the shield tail shell to correspond to a bolt removing opening of the original shield tail brush on a steel structure duct piece, and the original shield tail brush is connected with the steel structure duct piece through long bolts;
(6) the shield continuously advances to drive the original shield tail brush to the tail end of the sliding chute along the sliding chute, the shield tail brush is correspondingly clamped into a clamping groove on a sliding rod of the original shield tail brush through an elastic clamping piece at the tail end of the sliding chute, a spring bolt adjusting structure is adjusted to enable a new shield tail brush to be closely contacted with a shield tail shell, the sliding rod moves in the sliding chute to enable the new shield tail brush to be installed in place, three rows of bolts of the new shield tail brush sequentially correspond to bolt installing ports of the new shield tail brush on a steel structure segment, tunneling is stopped, and a secondary rear cavity pressurizing test is started through vent holes and pressure measuring holes in the steel segment;
(7) sequentially installing and screwing bolts on the new shield tail brush through a bolt installing port of the new shield tail brush, removing the connection between the steel structure pipe piece and the new shield tail brush, starting a grease system of the shield machine, filling a grease cavity, and repeatedly performing a front cavity pressurizing test again when the pressure of the grease system reaches a design value;
(8) and after the pressure test reaches the standard, the shield tunneling machine continues to tunnel forwards to enable the original shield tail brush to be separated from the shield tail, the steel structure segment side wing steel plates are removed one by one, normal tunneling is recovered, and replacement of the shield tail brush is completed.
The invention has the following excellent technical scheme: the spring bolt adjusting structure in the step (1) comprises an adjusting screw rod, an adjusting nut and a spring ring fixed on the locking block, the locking block is of a hollow cylinder structure, the diameter of the upper part of the locking block is matched with the diameter of a mounting and adjusting hole of a new shield tail brush on a steel structure pipe piece, the diameter of the lower part of the locking block is larger than that of the mounting and adjusting hole of the new shield tail brush, the hollow part of the locking block is matched with the diameter of the adjusting screw rod, the diameter of the spring ring is smaller than that of the adjusting hole and can be compressed in the mounting and adjusting hole of the new shield tail brush, and the length of the spring ring under the condition of no pressure is larger than or equal to the height from the bottom end of the mounting and adjusting hole of the new shield tail brush to the inner wall of the shield shell; a screw fixing groove is correspondingly formed on the sliding rod of the shield tail brush assembly; the specific installation process of the spring adjusting bolt structure is as follows: the adjusting screw rod penetrates through a through hole in the bottom of the locking block and is inserted into a new shield tail brush mounting adjusting hole together with the spring ring, the bottom of the locking block is fixed on a steel structure tube sheet through a bolt, an adjusting nut is arranged on the inner side of the steel structure tube sheet, the height of the adjusting screw rod is controlled through the adjusting nut, the adjusting screw rod is inserted into a corresponding screw rod fixing groove in the sliding rod and is screwed up and fixed, and then the adjusting nut is fixed, so that a shield tail brush assembly can be fixed on the steel structure tube sheet.
The invention has the following excellent technical scheme: when the sliding rod of the new shield tail brush is in butt joint with the sliding groove in the shield tail shell in the step (4), if deviation occurs, the distance adjusting structure is adopted for adjusting, the distance adjusting structure comprises an adjusting rack distributed along the circumferential direction of the shield tail brush mounting ring piece and an adjusting gear meshed with the adjusting rack, the central position of the adjusting gear is inserted into the mounting hole in the duct piece through a tool, and the adjusting gear is rotated, so that the shield tail brush mounting ring piece is driven to move circumferentially to finely adjust the circumferential position.
The invention has the following excellent technical scheme: the connection of the pushing rope in the step (4) is to weld a rope hook or weld a big-end bolt on the original shield tail brush in advance and directly hang the pushing rope; and (5) connecting a chain block to the self end of the pushing rope, and tightening the pushing rope through the chain block to drive the original shield tail brush to move along the sliding groove on the inner wall of the shield tail shell in the step (5).
In order to achieve the aim, the invention provides the technical scheme that
The invention has the beneficial effects that:
(1) the shield tail brush is formed by splicing a plurality of shield tail brush components, wherein each shield tail brush component is formed by connecting a plurality of shield tail brushes into a whole through a sliding rod, then embedding the plurality of shield tail brushes into a slide way on the inner wall of a shield tail shell through the sliding rod and fixing the plurality of shield tail brushes through bolts, and the shield tail brush is simple and convenient to install; when the shield tail brush is disassembled and assembled, the bolt of the shield tail brush is only required to be screwed and delivered, the shield tail brush can be withdrawn from the slideway to be disassembled in the shield construction process, and the shield tail brush is simple and convenient to install.
(2) The two ends of the shield tail brush mounting piece of each shield tail brush mounting structure are designed by adopting the slope feet, so that the adjacent shield tail brush components are more tightly pressed, the assembly between the shield tail brushes is more tight, and the sealing weak points are not easy to generate.
(3) The invention also provides a steel structure segment which is convenient for installing the shield tail brush, the steel structure segment structure is adopted to replace the original shield segment, the improved shield tail brush component is pre-installed on each steel structure segment and is communicated with the steel structure segments to be assembled together, the shield tail brush can be assembled into a complete ring in the segment assembling process, and the shield tail brush can be moved to the shield tail brush installation position in the shield advancing process to be installed.
(4) A plurality of bolt mounting holes and dismounting holes are correspondingly formed in each steel structure segment, an original shield tail brush can be dismounted through the dismounting holes in the shield advancing process of a shield machine, and a new shield tail brush can be mounted through the mounting holes, so that the operation is simple; the replacement of the whole-ring shield tail brush can be realized, and the shield tail brush of a certain part can be replaced.
(5) When the shield tail is replaced, the new shield tail brush and the old shield tail brush are alternately installed, the old shield tail brush can play a certain sealing role when the new shield tail brush is not installed in place, and the shield tail temporary sealing problem can be realized by arranging the sealing steel plate at the tail part between the outer end of the steel structure pipe piece and the shield shell, so that under the condition of no reinforcing working condition, special reinforcement is not needed, and the shield tail water burst and sand burst risk can be avoided.
(6) According to the invention, the spring adjusting bolt is arranged between the shield tail brush assembly and the steel structure pipe piece, and the fine adjustment saw teeth are arranged on the tail brush structure, so that temporary protection and bidirectional space adjustment of the shield tail brush are realized.
The invention realizes the replacement work of the shield tail brush in the shield process, replaces the former stratum reinforcing measure by utilizing the shield tail protection device which is designed by self, does not need to carry out the reinforcing measure in the shield tail brush replacement process, can avoid the shield tail water and sand gushing risk, reduces the construction difficulty, shortens the construction period and reduces the construction cost; and can be applied to the special condition without the reinforcing working condition.
Drawings
FIG. 1 is an axial cross-sectional schematic view of the present invention;
FIG. 2 is a schematic view of the connection between a shield tail brush and a steel structure segment in the invention;
FIG. 3 is a schematic plan view of a single shield tail brush assembly in connection with a steel structural segment according to the present invention;
FIG. 4 is a schematic circumferential cross-sectional view of the present invention;
FIG. 5 is a schematic view of a tail brush assembly of the present invention;
FIG. 6 is a side view of a trailing shield brush according to the present invention;
FIG. 7 is a top view of a shield tail brush in an embodiment of the present invention;
FIG. 8 is a schematic view of the installation of the tail brush of the present invention;
FIG. 9 is a schematic view of the outer annular surface structure of a steel structural segment in accordance with the present invention;
FIG. 10 is a schematic view of the inner annular surface structure of the steel-structured duct piece according to the present invention;
FIG. 11 is a view of the spring coil of the present invention shown uncompressed;
FIG. 12 is a schematic view of an adjustment screw and installation;
FIG. 13 is a schematic diagram of the splicing of two adjacent shield tail brush mounting ring segments;
FIG. 14 is a schematic view of the shield tail brush assembly of the present invention after it has been installed in the shield tail housing;
FIGS. 15 to 20 are schematic views showing the replacement process of the tail brush of the shield of the present invention;
FIG. 21 is a schematic view showing the circumferential direction of the connection between the side wing steel plates and the steel structural segment in the present invention;
FIG. 22 is a schematic view of the structure of connecting the side wing steel plates and the steel structure segment in a single piece.
In the figure: 1-shield tail brush mounting ring piece, 2-sliding rod, 200-clamping groove, 200-sliding ball, 3-shield tail brush, 4-mounting hole, 5-shield tail shell, 6-sliding groove, 600-elastic fastener, 601-splayed enlarged opening, 7-bolt mounting groove, 8-fastening bolt, 9-distance adjusting structure, 900-adjusting rack, 901-adjusting gear, 10-sealing gasket, 11-steel structure tube piece, 12-spring bolt adjusting structure, 1200-adjusting hole, 1201-screw fixing groove, 1202-adjusting screw, 1203-adjusting nut, 1204-locking block, 1205-spring ring, 1206-enlarged head, 13-new shield tail brush bolt mounting opening, 14-original shield tail bolt dismounting opening, 15-long bolt, 16-side wing steel plate, 17-original shield tail brush, 18-shield tube piece, 19-shield cutter head, 20-dismounting tool, 21-new shield tail brush, 22-propulsion oil cylinder, 23-push rope, 24-seam steel plate.
Detailed Description
The invention is further illustrated by the following figures and examples. Fig. 1 to 14 are drawings of embodiments, which are drawn in a simplified manner only for the purpose of clearly and concisely illustrating embodiments of the present invention. The following claims presented in the drawings are specific to embodiments of the invention and are not intended to limit the scope of the claimed invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The specific structure of the shield tail brush in the embodiment is as shown in fig. 1 to fig. 3, and the shield tail brush is an annular shield tail brush formed by splicing a plurality of shield tail brush assemblies, and in order to avoid a gap from occurring after splicing the shield tail brush and cause poor sealing performance, as shown in fig. 13, two splicing ends of the shield tail brush mounting ring sheet 1 are provided with splicing inclined planes which are matched with each other, and the shield tail brush at the connecting part can be slightly longer. As shown in fig. 5 to 7, the shield tail brush assembly comprises three arc-shaped shield tail brush mounting ring pieces 1 arranged in parallel and equidistantly and a sliding rod 2 connecting the three shield tail brush mounting ring pieces 1, the shield tail brush mounting ring pieces 1 are divided into a shield tail brush welding area and a mounting area, the shield tail brush welding area and the mounting area are annular areas parallel to each other, a shield tail brush 3 is welded on the inner annular surface of the shield tail brush welding area of each shield tail brush mounting ring piece 1, a plurality of mounting holes 4 are circumferentially arranged in the mounting area of the shield tail brush mounting ring pieces 1, and the mounting holes 4 are long strip-shaped mounting holes and are arranged at positions where the shield tail brush mounting ring pieces 1 are not connected with the sliding rod 2 for convenience of installation. Each single shield tail brush assembly is provided with two sliding rods 2, the two sliding rods 2 are symmetrically arranged on the outer annular surfaces of the three shield tail brush installation ring pieces 1 in a bolt or welding mode, the insertion end of each sliding rod 2 is arc-shaped, the other end of each sliding rod 2 is provided with a clamping groove 200, a sealing gasket 10 is arranged on the outer annular surface of each shield tail brush installation ring piece 1, each sealing gasket 10 is a rubber gasket and is distributed at the position, not in contact with the sliding rod 2, of each shield tail brush installation ring piece 1. The middle shield tail brush installation ring piece 1 is provided with a distance adjusting structure 9, the distance adjusting structure comprises an adjusting rack 900 distributed along the circumferential direction of the shield tail brush installation ring piece 1 and an adjusting gear 901 meshed with the adjusting rack 900, and the circumferential distance of the three shield tail brush installation ring pieces 1 can be finely adjusted through the distance adjusting structure 9.
As shown in fig. 9 and 10, the steel structure segment 11 in the embodiment is modified by a conventional steel structure shield segment, the outer shape of the segment is the same as that of a common shield segment 18, and the main structure of the segment comprises a complete steel plate on the back side and a steel structure support on the inner ring surface. As shown in fig. 2, the shield tail brush assembly is mounted on the outer annular surface of the steel structural segment 11 through a spring bolt adjusting structure 12, three rows of new shield tail brush bolt mounting openings 13 are correspondingly formed in the positions of the steel structural segment 11 corresponding to the mounting holes 4 of the three shield tail brush mounting ring segments 1, and one row of original shield tail brush bolt dismounting openings 14 is formed in one end of the steel structural segment 11 adjacent to the shield tail; the new shield tail brush bolt mounting opening 13 and the original shield tail brush bolt dismounting opening 14 are identical in shape and mounting hole, the area of the new shield tail brush bolt mounting opening 13 and the area of the original shield tail brush bolt dismounting opening 14 are larger than or equal to the area of the mounting hole, and the new shield tail brush bolt mounting opening 13 and the original shield tail brush bolt dismounting opening 14 are plugged through plugging covers when not used. As shown in fig. 2, 11 and 12, the spring bolt adjusting structure 12 includes an adjusting hole 1200 formed in the steel structure segment 11, a screw fixing groove 1201 correspondingly formed in the sliding rod 2, a spring ring 1205 installed in the adjusting hole 1200, and an adjusting screw 1202, wherein the lower end of the spring ring 1205 is fixed on the steel structure segment 11 through a locking block 1204 provided with a screw through hole, the locking block 1204 is inserted into the bottom of the adjusting hole 1200 and fixed on the back steel plate portion of the steel structure segment 11 through a bolt, the upper end of the spring ring extends out of the adjusting hole 1200, the adjusting screw 1202 is inserted into the spring ring 1205 from the through hole of the locking block 1204 and extends to the sliding rod 2 to be in threaded connection with the screw fixing groove 1201 on the sliding rod 2, an adjusting nut 1203 is arranged in the area of the adjusting screw 1202 below the steel structure segment 11, and an expanding head 1206 connected with a mounting tool is arranged at the lower end of the adjusting screw 1202; the spring ring 1205 extends vertically to the inner wall of the shield shell in an uncompressed or slightly compressed state, and can provide an elastic force for adjusting the shield tail brush assembly, so that the spring ring can be tightly attached to the inner wall of the shield shell. The installation and adjustment process of the spring bolt adjusting structure 12 comprises the steps that a locking block 1204 fixed with a spring ring 1205 is installed in an adjusting hole 1200 through a bolt, the spring ring extends out of the adjusting hole and positions a shield tail brush assembly, then the end part of an adjusting screw 1202 extends into the adjusting hole 1200 from a through hole in the middle of the locking block 1204 and penetrates through the spring ring 1205 to extend into a screw fixing groove 1201 on a sliding rod 2 of the shield tail brush assembly, the spring ring is screwed tightly, then the height of the shield tail brush assembly is adjusted, and an adjusting nut 1203 on the adjusting screw is adjusted to be close to a steel structure segment 11 to be locked; when the height of the shield tail brush assembly needs to be adjusted, only the adjusting nut needs to be loosened, and the shield tail brush assembly can be popped up to a proper height under the action of the spring ring 1205.
The shield tail shell in the embodiment is also improved, as shown in fig. 1, fig. 4 and fig. 8, the shield tail shell comprises two parallel sliding grooves 6 and a plurality of bolt installation grooves 7 (or bolt installation holes) correspondingly arranged at the positions of the shield tail brushes arranged on the inner wall of the shield tail shell 5, the inlet of each sliding groove 6 is a splayed enlarged opening 601, the tail ends of the sliding grooves 6 are correspondingly provided with elastic clamping pieces 600, three shield tail brush installation ring pieces 1 slide into the sliding grooves 6 on the inner wall of the shield tail shell 5 through sliding rods 2, in order to enable the sliding to be smoother, the contact surfaces of the sliding rods 2 and the sliding grooves 6 are arc-shaped surfaces or are provided with a plurality of sliding balls 200, the sliding balls 200 are installed on the back surfaces of the sliding rods 2, the balls are embedded into groove bodies, and part of the arc-shaped installation grooves are exposed and can freely roll in the installation grooves. The mounting hole 4 on each shield tail brush mounting ring 1 corresponds to the bolt mounting groove 7 on the inner wall of the shield tail shell 5, when the shield machine advances to the position where the shield tail shell 5 is arranged outside the steel structure duct piece 11, the shield tail brush assembly slides into the chute 6 on the inner wall of the shield tail shell 5 through the slide rod 2, the fastening bolt 8 is mounted in the mounting hole 4 and the bolt mounting groove 7 which correspond to each other through the new shield tail brush bolt mounting opening 13 on the steel structure duct piece 11, the fastening bolt 8 is screwed up to fix the shield tail brush assembly on the inner wall of the shield tail shell 5, and the sealing gasket 8 on the outer annular surface of each shield tail brush mounting ring 1 is in close contact with the inner wall of the shield tail shell 5 after mounting.
The shield tail brush is formed by splicing together steel structure pipe pieces 11, the steel structure pipe pieces 11 are spliced into a complete shield ring piece by a pipe piece splicing machine of a shield machine, and particularly as shown in figures 1 and 4, after a plurality of steel structure pipe pieces 11 are spliced into a ring shape, shield tail brush mounting ring pieces 1 arranged on the outer ring surface of the steel structure pipe pieces 11 are correspondingly connected to form three annular shield tail brushes. When the shield tunneling machine advances to the position where the shield tail shell 5 is provided with the shield tail brushes and is arranged on the outer side of the steel structure pipe piece 11, each shield tail brush component slides into a sliding groove 6 corresponding to the inner wall of the shield tail shell 5 through a sliding rod 2 of each shield tail brush component, a mounting hole 4 in each shield tail brush mounting ring piece 1 corresponds to a bolt mounting groove 7 in the inner wall of the shield tail shell 5, and the shield tail brush mounting ring pieces 1 are fixed on the inner wall of the shield tail shell 5 through fastening bolts 8.
The replacement process of the invention is further described below with reference to specific embodiments, which are directed to the construction risk brought by the fact that in the long-distance shield construction process in a certain project, due to poor control in the tunneling process or unqualified self-quality and welding installation of the tail brush, certain point positions or overall abrasion transition is caused, and the water and slurry stopping effects are not achieved. In this case, the shield tail brush is replaced, and due to the instability of the stratum, a certain reinforcement measure is often adopted from the face of the cutter to the integral area of the duct piece behind the shield tail, so that the construction risk can be reduced, but the construction method has the defects of long construction period, heavy task, high investment and the like in the construction process. Therefore, the method of the invention is adopted for replacement, firstly, the original shield tail brush 17 and the new shield tail brush 21 are improved, the shield tail structure in the figures 5 to 7 is adopted for the original shield tail brush, and the structures of the original shield tail brush 17 and the new shield tail brush 21 are completely the same, in the shield tunneling process, when the original shield tail brush is found to be damaged and needs to be replaced, shield tunneling is stopped, a steel structure segment provided with a new shield tail brush bolt mounting port, an original shield tail brush bolt dismounting port and a new shield tail brush mounting adjusting hole is adopted to replace the original shield segment for segment assembling and tunneling process, the concrete structure of the steel structure segment 11 is shown in figures 9 and 10, the adjusting hole 1200 for mounting a spring adjusting bolt is reserved in the solid steel plate part of the steel structure segment 11, the mounting dismounting hole is a penetrability hole, and a plug cover for mounting the dismounting hole is designed in the inner arc surface of the steel structure segment; 54 square mounting and dismounting holes are designed on one ring of steel structure pipe pieces 11.
The specific replacement process of the invention is shown in the attached drawings 15-20, wherein the arrow in the drawings represents the shield tunneling direction, and the specific steps are as follows:
(1) assembling new shield tail brush assemblies to be replaced, welding and assembling the front surface of each shield tail brush installation ring piece 1 according to a shield tail brush installation program, then pasting a sealing gasket 10 in a groove reserved in the back surface of each shield tail brush installation ring piece 1, smearing a lubricant, smearing shield tail grease again, and filling a triangular area;
(2) installing the shield tail brush assembly which is installed and coated with the grease on the outer ring surface of the steel structure segment 11 through four spring bolt adjusting structures 12 according to the designed position, as shown in figure 1, adjusting the length of the bolts inside the steel tube segment to ensure that the steel structure segment 11 is convenient to assemble and does not rub with a shield tail shell; spring bolt regulation structure is as shown in fig. 12, including adjusting screw 1202, adjusting nut 1203 and the spring coil 1205 of fixing on latch block 1204, latch block 1204 is the diameter phase-match of new shield tail brush installation regulation hole 1200 diameter on upper portion diameter and the steel construction section of jurisdiction 11, the lower part diameter is greater than the hollow cylinder structure of new shield tail brush installation regulation hole 1200 diameter, wherein the diameter phase-match of hollow portion and adjusting screw 1202, the diameter of spring coil 1205 is less than the regulation hole, and can compress in new shield tail brush installation regulation hole 1200, the concrete installation process of its spring adjusting bolt structure is: the adjusting screw 1202 passes through a through hole at the bottom of the locking block 1204 and is inserted into a new shield tail brush mounting adjusting hole 1200 together with a spring ring 1205, the bottom of the locking block 1204 is fixed on a steel structure segment 11 through a bolt, an adjusting nut 1203 is arranged on the inner side of the steel structure segment 11, the height of the adjusting screw 1202 is controlled through the adjusting nut 1203 to be inserted into a corresponding screw fixing groove 1201 on the sliding rod 2 and screwed and fixed, and then the shield tail brush assembly can be fixed on the steel structure segment 11 after the adjusting nut 1203 is fixed;
(3) hoisting and transporting the steel structure duct pieces 11 carrying the shield tail brush assembly in a shield tail area, starting shield tunneling to a steel ring splicing position, and splicing the steel structure duct pieces 11 one by utilizing a splicing machine system;
(4) after the steel structure segment 11 is assembled, as shown in fig. 15 and 21, the tail of the steel structure segment 11 is sealed by adopting side wing steel plates 16, as shown in fig. 22, gaps between the side wing steel plates 16 are connected by adopting seam steel plates 24, the steel plates are connected by adopting bolts, a sealing strip is arranged at the connecting gap, so that the tail of the steel structure segment forms a seal, and then a first front cavity pressurizing test is started through a vent hole and a pressure measuring hole on the tail of the steel structure segment 11;
(5) starting second ring tunneling, opening an original shield tail brush bolt removing opening 14 of an original shield tail brush on a steel structure segment 11, and advancing the oil cylinder stroke to a first row of bolts of an original shield tail brush 17, as shown in fig. 16, wherein the original shield tail brush bolt removing opening 14 of the steel structure segment 11 is right opposite to the first row of bolts of the original shield tail brush 17, stopping tunneling, beginning to remove the first row of bolts of the original shield tail brush 17, connecting a push rope 23, welding a hook or a bolt on the original shield tail brush 17, directly hanging a backward push rope 23, extending the backward push rope 23 out of the original shield tail brush bolt removing opening 14, connecting a chain block, and controlling the push rope 23 to drive the original shield tail brush 17 to slide in the chute 6 through the chain block; continuing to dig to the second row of bolts, stopping digging and beginning to remove the second row of bolts of the original shield tail brush 17 as shown in fig. 17, and simultaneously adjusting the length of the spring bolt of the new shield tail brush to enable the installation sliding key to be in butt joint with the expanded key opening; in the process of butt joint of the installation sliding key and the enlarged key opening, if a slight deviation occurs in the position, the fine adjustment device is used for adjusting to enable the position to be matched;
(6) the shield machine continues to drive forwards to the third row of bolts of the original shield tail brush 17, as shown in fig. 18 and fig. 19, the driving is stopped, the third row of bolts of the original shield tail brush is removed, the original shield tail brush 17 is disconnected with the shield tail shell 5, the backward pushing rope 23 is tightened, the original shield tail brush is driven to move along the chute on the shield tail shell to the position where the second bolt hole of the original shield tail brush corresponds to the bolt removing opening of the original shield tail brush on the steel structure duct piece, the original shield tail brush is connected with the steel structure duct piece through the long bolt to form two seals, the position relation between the slide rod 2 of the new tail brush 21 and the shield chute 6 is observed through the strip-shaped mounting hole, and fine adjustment can be carried out if the third row of bolts does not correspond to the original shield tail brush;
(7) the shield continuously advances to drive the original shield tail brush to move to the tail end of the sliding chute along the sliding chute, and the shield tail brush is correspondingly clamped into a clamping groove on the sliding rod of the original shield tail brush through an elastic clamping piece at the tail end of the sliding chute; adjusting a spring bolt adjusting structure to enable the new shield tail brush to be in close contact with the shield tail shell, moving the new shield tail brush in the sliding groove by means of the sliding rod to enable the new shield tail brush to be installed in place, enabling three rows of bolts of the new shield tail brush to sequentially correspond to bolt installing openings of the new shield tail brush on the steel structure segment, stopping tunneling, and starting a second rear cavity pressurizing test through air holes and pressure measuring holes in the steel tube segment;
(8) sequentially installing and screwing bolts on the new shield tail brush through the installation holes 13, as shown in fig. 20, removing the connection between the steel structure duct piece 11 and the new shield tail brush 21, starting a grease system of the shield machine, filling a grease cavity, and repeatedly performing a front cavity pressurizing test again when the pressure of the grease system reaches a design value;
(9) after the pressurization test reaches the standard, the shield tunneling machine continues to tunnel forwards, the original shield tail brush 17 is separated from the shield tail structure, the connection between the steel structure segment 11 and the original shield tail brush 17 can be removed, or the steel structure segment 11 can be left in the soil layer without being removed; removing the steel pipe sheet side wing steel plates one by one, recovering normal tunneling and finishing the replacement of the whole system; and finally, after a distance of tunneling, performing back grouting reinforcement on the steel pipe sheet.
In summary, the present invention is described as an embodiment, but the present invention is not limited to the above embodiment, and any similar or identical means may be used to achieve the technical effects of the present invention, and all such means should fall within the protection scope of the present invention.
Claims (9)
1. The utility model provides a shield tail brush of convenient change which characterized in that: the shield tail brush comprises an annular shield tail brush formed by splicing a plurality of shield tail brush assemblies and a steel structure pipe piece (11) matched with the annular shield tail brush during installation, each shield tail brush assembly comprises at least three arc-shaped shield tail brush installation ring pieces (1) arranged in parallel and a sliding rod (2) for connecting the at least three shield tail brush installation ring pieces (1), a shield tail brush (3) is welded on the inner annular surface of each shield tail brush installation ring piece (1), a plurality of installation holes (4) are formed in each shield tail brush installation ring piece (1), and the sliding rod (2) is installed on the outer annular surface of the at least three shield tail brush installation ring pieces (1); a sliding chute (6) and a plurality of bolt mounting grooves (7) are correspondingly arranged at the position where the shield tail brush is mounted on the inner wall of the shield tail shell (5); a new shield tail brush bolt mounting opening (13) and an original shield tail brush bolt dismounting opening (14) are formed in the steel structure duct piece (11); when the shield tail brush is replaced, a single shield tail brush component of a new shield tail brush (21) is arranged on the outer ring surface of a single steel structure pipe piece (11) through a spring bolt adjusting structure (12), and a new shield tail brush bolt mounting opening (13) on the pipe piece corresponds to a mounting hole (4) on each shield tail brush mounting ring piece (1) of the new shield tail brush (21); the steel structure pipe pieces (11) are spliced into a complete shield ring piece by a pipe piece splicing machine of the shield machine, and after a plurality of steel structure pipe pieces (11) are spliced into a ring, shield tail brush mounting ring pieces (1) arranged on the outer ring surface of the steel structure pipe pieces (11) are correspondingly connected to form at least three annular shield tail brushes; when the shield tunneling machine advances to the position where the shield tail brushes are installed on the shield tail shell (5) and are arranged on the outer side of the steel structure duct piece (11), each shield tail brush assembly slides into a sliding groove (6) corresponding to the inner wall of the shield tail shell (5) through a sliding rod (2) of each shield tail brush assembly, an installation hole (4) in each shield tail brush installation ring piece (1) corresponds to a bolt installation groove (7) in the inner wall of the shield tail shell (5), fastening bolts (8) are installed in the installation holes (4) and the bolt installation grooves (7) corresponding to each other through a new shield tail brush bolt installation opening (13) in the steel structure duct piece (11), and the fastening bolts (8) are screwed down to fix the shield tail brush installation ring pieces (1) on the inner wall of the shield tail shell (5).
2. The shield tail brush convenient to replace of claim 1, wherein: one end of the sliding rod (2) is arc-shaped, the other end of the sliding rod is provided with a clamping groove (200), an inlet of the sliding chute (6) is a splayed expanding opening (601), and the tail end of the sliding chute (6) is correspondingly provided with an elastic clamping piece (600); the contact surface of the sliding rod (2) and the sliding groove (6) is an arc surface or is provided with a plurality of sliding balls.
3. The shield tail brush convenient to replace of claim 1, wherein: each shield tail brush assembly is provided with three shield tail brush mounting ring pieces (1) and two sliding rods (2) which are parallel to each other, the distances between shield tail brushes on the three shield tail brush mounting ring pieces (1) are equal, the two sliding rods (2) are symmetrically mounted on the outer ring surfaces of the three shield tail brush mounting ring pieces (1) in a bolt or welding mode, when the sliding rods (2) are embedded into corresponding sliding grooves (6), the outer ring surface of each shield tail brush mounting ring piece (1) is in contact with the inner wall of a shield tail shell (5), and a sealing gasket (10) is arranged at a part, not in contact with the sliding rods (2), of the outer ring surface of each shield tail brush mounting ring piece (1); the shield tail brush mounting ring piece (1) is divided into a shield tail brush welding area and a mounting area, the shield tail brush welding area and the mounting area are annular areas which are parallel to each other, and the mounting holes (4) are distributed circumferentially along the mounting area of the shield tail brush mounting ring piece (1); three rows of new shield tail brush bolt mounting openings (13) are correspondingly formed in the steel structure duct piece (11), and one row of original shield tail brush bolt dismounting openings (14) are formed in one end, close to the shield tail, of the steel structure duct piece (11); the mounting hole (4) is a strip-shaped mounting hole and is formed in the part, which is not connected with the sliding rod (2), of the shield tail brush mounting ring sheet (1); the shape of the new shield tail brush bolt mounting opening (13) and the original shield tail brush bolt dismounting opening (14) is the same as that of the mounting hole (4), and the area of the new shield tail brush bolt mounting opening and the original shield tail brush bolt dismounting opening is larger than or equal to that of the mounting hole (4).
4. The shield tail brush convenient to replace of claim 1, wherein: the spring bolt adjusting structure (12) comprises an adjusting hole (1200) formed in a steel structure pipe piece (11), a screw rod fixing groove (1201) correspondingly formed in a sliding rod (2), a spring ring (1205) installed in the adjusting hole (1200) and an adjusting screw rod (1202), the lower end of the spring ring (1205) is fixed on the steel structure pipe piece (11) through a locking block (1204) provided with a screw rod through hole, the upper end of the spring ring extends out of the adjusting hole (1200), the adjusting screw rod (1202) is inserted into the spring ring (1205) from the through hole of the locking block (1204) and extends to the sliding rod (2) to be in threaded connection with the screw rod fixing groove (1201) on the sliding rod (2), an adjusting nut (1203) is arranged in an area, below the steel structure pipe piece (11), and an expanding head (1206) connected with an installation tool is arranged at the end part of the lower end of the adjusting screw rod (1202); and the spring ring (1205) vertically extends to the inner wall of the shield shell in a non-pressure state.
5. The shield tail brush convenient to replace of claim 3, wherein: a distance adjusting structure (9) is arranged on the shield tail brush mounting ring piece (1) in the middle, and the distance adjusting structure comprises adjusting racks (900) distributed along the circumferential direction of the shield tail brush mounting ring piece (1) and adjusting gears (901) meshed with the adjusting racks (900); and two splicing ends of the shield tail brush mounting ring piece (1) are provided with splicing inclined planes which are matched with each other.
6. A method for replacing a conveniently replaced tail brush under the long-distance non-reinforced working condition according to any one of claims 3 to 5, characterized in that the structure of the new tail brush is identical to that of the original tail brush, each tail brush component forming the tail brush is provided with three tail brush mounting ring pieces, when the original tail brush is found to be damaged and needs to be replaced in the shield tunneling process, shield tunneling is stopped, and a steel structure segment provided with a new tail brush bolt mounting port, an original tail brush bolt dismounting port and a new tail brush mounting adjusting hole is adopted to replace the original shield segment for segment assembling and tunneling, and the specific replacement steps are as follows:
(1) before the steel structure duct pieces are transported and assembled, a single shield tail brush component of a new shield tail brush is installed on the outer ring surface of each steel structure duct piece through a spring bolt adjusting structure, and the height of the shield tail brush component is adjusted in the installation process, so that the installation of the steel structure duct pieces is not influenced, and the shield tail brush component does not contact and rub with a shield tail shell; then, sealing the new shield tail brush bolt mounting opening and the original shield tail brush bolt dismounting opening on the steel structure segment by using a sealing cover;
(2) hoisting and transporting the steel structure duct pieces carrying the shield tail brush assembly in a shield tail area, starting shield tunneling to a steel ring splicing position, and splicing the steel structure duct pieces one by using a shield tunneling machine splicing machine system;
(3) after the steel structure duct piece is assembled, sealing the tail of the steel structure duct piece by adopting a lateral wing steel plate and a seam steel plate, and starting a first front cavity pressing test through a vent hole and a pressure measuring hole in the steel structure duct piece;
(4) after the steel structure duct piece is assembled, the shield tunneling machine continues tunneling, an original shield tail brush removing opening on the steel structure duct piece is opened, the oil cylinder stroke is pushed to the position where an original shield tail brush bolt removing opening of the steel structure duct piece is opposite to a first row of bolts of an original shield tail brush, the tunneling is stopped, a bolt removing tool penetrates through the original shield tail brush bolt removing opening to sequentially remove the first row of bolts of the original shield tail brush, meanwhile, a pushing rope is connected to the original shield tail brush, and the pushing rope penetrates through the inner side of the steel structure duct piece from the original shield tail brush bolt removing opening on the steel structure duct piece to be fixed; continuing to dig until the bolt removing opening of the original shield tail brush of the steel structure duct piece is opposite to the second row of bolts of the original shield tail brush, stopping digging, sequentially removing the second row of bolts of the original shield tail brush, and ensuring that the free end of the pushing rope is arranged on the inner side of the steel structure duct piece; meanwhile, the height of the new shield tail brush is adjusted, so that the sliding rod of the new shield tail brush is in butt joint with the inlet of the sliding chute;
(5) the shield machine continues to drive forwards to the third row of bolts of the original shield tail brush, the driving is stopped, the third row of bolts of the original shield tail brush are sequentially removed, the original shield tail brush is disconnected with the shield tail shell, the pushing rope starts to be tightened, the original shield tail brush is driven to move to a second bolt hole of the original shield tail brush along a sliding groove in the shield tail shell to correspond to a bolt removing opening of the original shield tail brush on a steel structure duct piece, and the original shield tail brush is connected with the steel structure duct piece through long bolts;
(6) the shield continuously advances to drive the original shield tail brush to move to the tail end of the sliding chute along the sliding chute, and the shield tail brush is correspondingly clamped into a clamping groove on the sliding rod of the original shield tail brush through an elastic clamping piece at the tail end of the sliding chute; adjusting a spring bolt adjusting structure to enable the new shield tail brush to be in close contact with the shield tail shell, moving the new shield tail brush in the sliding groove by means of the sliding rod to enable the new shield tail brush to be installed in place, enabling three rows of bolts of the new shield tail brush to sequentially correspond to bolt installing openings of the new shield tail brush on the steel structure segment, stopping tunneling, and starting a second rear cavity pressurizing test through air holes and pressure measuring holes in the steel tube segment;
(7) sequentially installing and screwing bolts on the new shield tail brush through a bolt installing port of the new shield tail brush, removing the connection between the steel structure pipe piece and the new shield tail brush, starting a grease system of the shield machine, filling a grease cavity, and repeatedly performing a front cavity pressurizing test again when the pressure of the grease system reaches a design value;
(8) and after the pressure test reaches the standard, the shield tunneling machine continues to tunnel forwards to enable the original shield tail brush to be separated from the shield tail, the steel structure segment side wing steel plates are removed one by one, normal tunneling is recovered, and replacement of the shield tail brush is completed.
7. The method for replacing the shield tail brush convenient to replace under the long-distance reinforcement-free working condition according to claim 6, wherein the method comprises the following steps: the spring bolt adjusting structure in the step (1) comprises an adjusting screw rod, an adjusting nut and a spring ring fixed on the locking block, the locking block is of a hollow cylinder structure, the diameter of the upper part of the locking block is matched with the diameter of a mounting and adjusting hole of a new shield tail brush on a steel structure pipe piece, the diameter of the lower part of the locking block is larger than that of the mounting and adjusting hole of the new shield tail brush, the hollow part of the locking block is matched with the diameter of the adjusting screw rod, the diameter of the spring ring is smaller than that of the adjusting hole and can be compressed in the mounting and adjusting hole of the new shield tail brush, and the length of the spring ring under the condition of no pressure is larger than or equal to the height from the bottom end of the mounting and adjusting hole of the new shield tail brush to the inner wall of the shield shell; a screw fixing groove is correspondingly formed on the sliding rod of the shield tail brush assembly; the specific installation process of the spring adjusting bolt structure is as follows: the adjusting screw rod penetrates through a through hole in the bottom of the locking block and is inserted into a new shield tail brush mounting adjusting hole together with the spring ring, the bottom of the locking block is fixed on a steel structure tube sheet through a bolt, an adjusting nut is arranged on the inner side of the steel structure tube sheet, the height of the adjusting screw rod is controlled through the adjusting nut, the adjusting screw rod is inserted into a corresponding screw rod fixing groove in the sliding rod and is screwed up and fixed, and then the adjusting nut is fixed, so that a shield tail brush assembly can be fixed on the steel structure tube sheet.
8. The method for replacing the shield tail brush convenient to replace under the long-distance reinforcement-free working condition according to claim 6, wherein the method comprises the following steps: when the sliding rod of the new shield tail brush is in butt joint with the sliding groove in the shield tail shell in the step (4), if deviation occurs, the distance adjusting structure is adopted for adjusting, the distance adjusting structure comprises an adjusting rack distributed along the circumferential direction of the shield tail brush mounting ring piece and an adjusting gear meshed with the adjusting rack, the central position of the adjusting gear is inserted into the mounting hole in the duct piece through a tool, and the adjusting gear is rotated, so that the shield tail brush mounting ring piece is driven to move circumferentially to finely adjust the circumferential position.
9. The method for replacing the shield tail brush convenient to replace under the long-distance reinforcement-free working condition according to claim 6, wherein the method comprises the following steps: the connection of the pushing rope in the step (4) is to weld a rope hook or weld a big-end bolt on the original shield tail brush in advance and directly hang the pushing rope; and (5) connecting a chain block to the self end of the pushing rope, and tightening the pushing rope through the chain block to drive the original shield tail brush to move along the sliding groove on the inner wall of the shield tail shell in the step (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010540567.3A CN111706340B (en) | 2020-06-15 | 2020-06-15 | Shield tail brush convenient to replace and method for replacing shield tail brush under long-distance non-reinforced working condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010540567.3A CN111706340B (en) | 2020-06-15 | 2020-06-15 | Shield tail brush convenient to replace and method for replacing shield tail brush under long-distance non-reinforced working condition |
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| CN111706340A CN111706340A (en) | 2020-09-25 |
| CN111706340B true CN111706340B (en) | 2021-11-05 |
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| CN112610228B (en) * | 2020-12-28 | 2023-05-09 | 中国建筑股份有限公司 | Rapid replacement method of shield tail brush |
| CN114233306A (en) * | 2021-11-25 | 2022-03-25 | 中铁工程装备集团有限公司 | Multifunctional tunneling device |
| CN114198109B (en) * | 2022-02-17 | 2022-05-27 | 中铁隧道局集团路桥工程有限公司 | Earth pressure balance shield machine and tunneling method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102031976A (en) * | 2010-12-30 | 2011-04-27 | 昆山众备机械设备有限公司 | Reinforced structure of shield-tail sealing brush wire group |
| CN107035378B (en) * | 2017-05-25 | 2019-04-16 | 上海隧道工程有限公司 | The method of super-large-diameter shield machine exchanging shield ventral brush under high hydraulic condition |
| CN206753594U (en) * | 2017-06-02 | 2017-12-15 | 中铁工程装备集团有限公司 | A kind of scalable replacing ventral brush structure of shield machine |
| CN107687344B (en) * | 2017-09-12 | 2019-04-05 | 北京建工土木工程有限公司 | A kind of shield machine exchanging shield ventral brush stretches steel loop, sealing structure and replacing options |
| CN208267846U (en) * | 2018-05-16 | 2018-12-21 | 华东交通大学 | A kind of shield machine ventral brush device |
| CN108571322B (en) * | 2018-05-16 | 2023-08-15 | 华东交通大学 | Shield tunneling machine tail brush device and replacement method thereof |
| CN109098721B (en) * | 2018-08-10 | 2019-11-12 | 中铁一局集团有限公司 | A kind of shield repair shield tail brush method |
| CN110230498A (en) * | 2019-05-23 | 2019-09-13 | 廊坊辰兴机械有限公司 | A kind of fast disassembly type shield tail brush and tail sealing device of shield |
| CN212508320U (en) * | 2020-06-15 | 2021-02-09 | 中铁十一局集团城市轨道工程有限公司 | Shield tail brush device capable of being replaced in shield tunneling process |
| CN212508321U (en) * | 2020-06-15 | 2021-02-09 | 中铁十一局集团有限公司 | Shield constructs tail brush structure of machine of conveniently changing |
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