CN118187888A - Shield cutter head cleaning method - Google Patents
Shield cutter head cleaning method Download PDFInfo
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- CN118187888A CN118187888A CN202410308716.1A CN202410308716A CN118187888A CN 118187888 A CN118187888 A CN 118187888A CN 202410308716 A CN202410308716 A CN 202410308716A CN 118187888 A CN118187888 A CN 118187888A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000002002 slurry Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 21
- 230000005641 tunneling Effects 0.000 claims abstract description 21
- 238000009412 basement excavation Methods 0.000 claims description 18
- 238000005553 drilling Methods 0.000 claims description 15
- 239000004575 stone Substances 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002360 explosive Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010902 jet-milling Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a shield cutter head cleaning method. The method specifically comprises the steps of directly feeding a bin to clean the inside of a cutter disc, then disassembling a cover plate at a reserved opening of a screw machine, adopting a high-pressure water knife to break slurry on the back surface area of the cutter disc, and adopting a drill hole to presplit an area which cannot be broken, and then using a pneumatic pick to lengthen a drill bit to break the area; and finally, aiming at the cleaning of the outer cambered surface and the tunnel face of the cutterhead, the last ring pipe slice of the shield tail is dismantled and planed to form a working face, then a vertical channel is formed by downwards excavating with a water mill drill, then a horizontal channel is formed by downwards excavating to the tunnel face of the cutterhead along the tunneling direction, then the drill is drilled on the left side and the right side of the edge of the cutterhead right below the cutterhead to clean the edge of the cutterhead, and a jack is erected to assist the cutterhead to rotate to get rid of the trouble after the cleaning is completed. The invention effectively solves the problems that the high-strength grouting material in the underground narrow and tight space is broken and cleaned, and explosive cannot be used, and the conventional cleaning work space is limited and is difficult to spread, so that the cutterhead cannot be quickly released.
Description
Technical Field
The invention relates to the field of shield construction, in particular to a shield cutter head cleaning method.
Background
With the development of urban construction in China, underground projects such as underground rail transit and river crossing tunnels are increasingly increased, and the shield pushing distance of the tunnels is also longer and longer. The shield method is a fully mechanized construction method for modern tunnel construction, and mainly uses mechanical equipment as a shield machine, wherein the shield machine cuts soil and breaks broken stones through a cutter in the tunneling process.
In the shield construction process, multi-region cross operation often exists, grouting can be performed after the ground or duct piece wall is nearby the shield machine, or when a structure is built above the cutterhead in the tunneling process of the shield machine, the structure needs to be grouted and repaired, grouting material flows to the cutterhead position possibly occur in the grouting process to wrap the cutterhead, grouting can be filled in the cutterhead and between the back of the cutterhead and a soil bin partition plate, and the cutterhead cannot operate due to the fact that the cutterhead is trapped. If the grouting material strength is not high or the grouting material is found to flow into the cutterhead in time for cleaning at the first time, the cutterhead can be rotated by means of the driving force of the cutterhead; when the grouting material strength is too high, and the grouting material is not found to flow into the soil bin before the grouting material is initially set, the cutter disc is wrapped up in a very high probability by adopting cleaning measures, and the cutter disc cannot rotate by means of self power.
At present, no special good method for getting rid of the problem of the cutterhead exists, after the cutterhead is wrapped up and dead due to the problem, the cutterhead is generally manually moved into a soil bin to clean the broken part of the solidified grouting material, and the cutterhead is tried to be turned again, but the cutterhead with small opening rate, especially the TBM cutterhead, cannot be cleaned completely by the conventional cleaning method, and the small air pick can only be used for breaking due to the narrow space on the back of the cutterhead, and the breaking area is limited by the length of the drill rod of the air pick, so that the cleaning range is limited, and many areas cannot be cleaned normally. For the cutter head outer cambered surface and the cutter head front-face working surface have no working space in the cleaning process, if the planed position is used as the working surface to be broken downwards in a water-jet milling drilling mode to form enough working surfaces to finish cleaning the cutter head front and the outer cambered surface, the cleaning of the cutter head front and the outer cambered surface is limited by narrow 6-point working space in the cutter head, and the small water-jet milling drilling mode is used for removing holes downwards and the small air picks are used for cleaning to two sides, so that the efficiency is low, and the cleaning working time node requirement cannot be finished. Therefore, aiming at the condition that the cutterhead is wrapped by slurry, the conventional cleaning method cannot clean the slurry wrapping the cutterhead, and the problem that the cutterhead is trapped is solved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a shield cutter head cleaning method which can efficiently clean the tank slurry wrapped by the interior of the cutter head, the back plate of the cutter head, the front-face surface of the cutter head and the outer cambered surface of the cutter head, so that the cutter head is quickly stranded, the cutter head is normally driven, the shield construction efficiency is improved, the construction time is saved, and the construction cost is reduced.
In order to achieve the technical purpose, the invention provides a shield cutter head cleaning method, which specifically comprises the following steps:
S1, cleaning the inside of a cutter head: directly entering the cutter head, and adopting any one or more tools of an air gun, an air pick and a water mill drill to break and clean the pulp blocks in each bin; meanwhile, cleaning the interior of a hob box of the grouting material wrapping area;
S2, cleaning the back of the cutterhead: disassembling a cover plate at a reserved opening of the screw machine, and breaking slurry accumulated between the back surface of a cutter disc and a soil bin partition plate through a high-pressure water knife, wherein in the process of breaking through the high-pressure water knife, silicon carbide is doped into water flow to increase the cutting force of the water knife, and the breaking range of the high-pressure water knife is within the range of 2 meters around the reserved opening of the screw machine; the residual solidified grouting material outside the range of 2 meters around the reserved opening of the screw machine is firstly drilled by adopting a water mill drill of an elongated drill rod, then a hydraulic splitting rod is used for presplitting, and finally an air pick elongated drill bit is used for breaking; the broken slag is transported out of the tunnel;
S3, cleaning the outer cambered surface of the cutterhead and the front-face of the cutterhead:
(1) Removing the last annular pipe slice of the shield tail, and planing an overhead working surface on the shield tail;
(2) Excavating downwards by using a large water mill drill on a shield tail working face in the air to form a vertical channel with the diameter larger than 1.5 m;
(3) After the vertical channel is dug, the vertical channel is dug forward to the face of the cutterhead along the tunneling direction to form a horizontal channel;
(4) After the horizontal channel is excavated in the step (3), water grinding and drilling are performed on the right side and the left side of the edge of the cutterhead along the right side of the edge of the cutterhead, holes are taken, coring and expanding excavation are performed to completely remove concrete on the edge of the cutterhead, and then a pneumatic pick extension bar is used for breaking grouting material on the front side of the cutterhead upwards from the right side of the cutterhead, so that the cutterhead cleaning work is completed;
S4, after the cutterhead cleaning work is finished, erecting a jack at a reserved opening position of a screw machine at the back of the cutterhead to assist the cutterhead to rotate, if the cutterhead can rotate, the cutterhead is successfully released, and if the cutterhead cannot move, the cutterhead continues to be dug to two sides under a front shield until a wrapped area is cleaned.
The invention has the preferable technical scheme that: and in the step S1, the hob cutter box of the grouting material wrapping area is cleaned, the accumulated slurry in the cutter box is specifically broken through the pneumatic pick, the hob cutter is planed, and the tangential stress on the cutter head when the accumulated slurry solidified in the cutter box flows into the cutter box rotates is avoided.
The invention has the preferable technical scheme that: in the step S2, a lengthened drill rod is adopted for water milling and drilling, the drilling diameter is 5cm, and broken slag is transported out of a tunnel through an electric vehicle after being bagged.
The invention has the preferable technical scheme that: in the step (1) of the step S3, a working face with the size of 1.8 x 1.8m is planed at the 6 point position of the shield tail.
The invention further adopts the technical scheme that: in the step (2) of the step S3, the diameter of the vertical channel is 1.6-2 m; the vertical channel is excavated in a mode that the shield tail is drilled downwards through a water mill to take holes, the holes are drilled downwards through the water mill, stone blocks are pre-split through a splitting machine after the water mill is completed, and large stone blocks are broken into small blocks to be taken out and conveyed to the outside.
The invention further adopts the technical scheme that: the excavation length of the horizontal channel in the step (3) of the step S3 is 8-9 m; the concrete excavation of the horizontal channel is that after the excavation of the working face of the vertical channel is completed at the shield tail, a bracket is built through a steel pipe, a bearing large-scale water mill drill is used for taking holes in the tunneling direction until the hole reaches the lower part of a cutter disc, a circle of holes are taken out at the periphery, a plurality of holes are taken out in the middle, and then a splitting machine is used for breaking large stones into small blocks to be taken out.
The invention has the preferable technical scheme that: and in the step (3) of the step S3, the 32M special front A-2 type teeth are welded on the steel cylinder of the terraced drill in a high-frequency induction heating mode.
The invention has the preferable technical scheme that: and (3) after the working surface in the step (4) of the step S3 reaches the right lower part of the cutter head, taking holes by using a drill bit of 165mm to the upper parts of two sides, taking holes for a single time to have the depth of 45-60 cm, and hollowing the right lower part of the cutter head in a mode of 1-1.2 m of channel diameter to form a channel with the diameter of 1-1.2 m, and cleaning the residual residues at the edge of the cutter head through a pneumatic pick and a pneumatic pick reinforced long drill rod after the channel is formed.
The invention has the preferable technical scheme that: and in the step S4, 2 200-ton jacks are erected at the reserved opening position of the screw machine at the back of the cutterhead to assist the cutterhead to rotate.
The invention has the beneficial effects that:
(1) The invention uses high-pressure and high-jet-speed water flow and quartz sand to realize the higher-efficiency breaking of slurry blocks in a limited space, and solves the problem that the space at the back of a cutter head is narrow and cannot be cleaned normally;
(2) The invention completes cleaning when a channel from the shield tail to the front set up reaches the right lower part of the cutter head, solves the problems of limited space and low operation efficiency in the process of drilling downwards in the cutter head to obtain an operation surface, and can efficiently clean the slurry on the front surface and the extrados of the cutter head;
(3) In the process of getting rid of the trouble of the cutterhead, a plurality of water mill drills can be arranged to synchronously take holes forwards by erecting the central positioning bracket; aiming at the abrasion and consumption of the water mill drill bit, a plum-cutter 32M special front A-2 type feeding 15mm-3 cutter head is adopted, water mill drill insert is realized through a high-frequency induction heating and powder welding mode, the remanufacturing speed of the water mill drill is improved, and the construction progress is ensured.
(4) According to the invention, 2 200-ton jacks are erected at the reserved opening of the screw machine at the back of the cutterhead to assist the cutterhead to rotate, so that the workload of cleaning grouting materials is reduced, and the escaping period is shortened.
The invention can efficiently clean the tank slurry wrapped by the cutter head interior, the cutter head backboard, the cutter head front-face surface and the cutter head outer cambered surface, so that the cutter head is quickly released from the device, the cutter head is driven normally, the shield construction efficiency is improved, the construction time is saved, and the construction cost is reduced; the problem that explosive cannot be used in the process of breaking and cleaning high-strength grouting materials in a narrow and small underground space is effectively solved, and the problem that a cutter head cannot be quickly released due to the fact that a conventional cleaning tool is difficult to spread due to limited space is solved.
Drawings
FIG. 1 is a schematic front view of a cutterhead wrapped with casting slurry in an embodiment;
FIG. 2 is a schematic side view of a cutterhead wrapped with casting slurry in an embodiment;
FIG. 3 is a schematic diagram of a tunnel excavation from the shield tail to the cutterhead in an embodiment;
FIG. 4 is a schematic view of shield tail downward excavation in an embodiment;
FIG. 5 is a horizontal forward digging section view in an embodiment;
FIG. 6 is a schematic diagram of the distance direction of a channel excavated from the shield tail to the cutterhead in an embodiment;
Fig. 7 is a schematic view of cleaning directly below the cutterhead in an embodiment.
In the figure: 1-a cutter head; 2-pouring slurry wrapping area; 3-horizontal channel; 4-a vertical channel; 5, water grinding to drill holes; and 6, an operation space right below the cutterhead.
Detailed Description
The invention is further described below with reference to the drawings and examples. The drawings are drawings of embodiments, which are presented in a simplified manner, and serve only to clearly and briefly illustrate embodiments of the invention. The following technical solutions presented in the drawings are specific to embodiments of the present invention and are not intended to limit the scope of the claimed invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment aims at that after the tunneling of the right line 396 ring of the mountain of the occipital peak is completed, the pipe is distributed in the trolley for grouting in order to match with the water diversion tunnel, and the right line is stopped. The bottom layer of the shutdown position of the shield machine is breeze tuff, the rock stratum strength is 98 megapascals, and the buried depth is 167 meters. The next day of stopping, the operator prepares to rotate the cutter disc to drain water, the torque of the cutter disc reaches the upper limit 19500 KN.M, the cutter disc cannot operate, and after the water accumulation in the cabin is pumped and drained, the range of 2 meters below the cutter disc is found to be wrapped by grouting materials (C50, initial setting for 3 hours and final setting for 10 hours, and the final setting strength is 50 MPa); as shown in fig. 1 and 2. The cutterhead of this project was a DZ771 cutterhead having a maximum excavation diameter of 8640 mm, a parcel zone depth of about 2 meters and a width of about 7.36 meters. As shown in FIG. 2, the grouting material in the cutter head is about 11m3, the volume between the back of the cutter head and the soil bin partition plate is about 3m 3, and the volume between the face and the front of the cutter head is about 1.5m 3.
Because the cutter disc wrapping area is arranged at the lower part of the cutter disc and between the back surface of the cutter disc and the soil bin partition plate, the inner space of the cutter disc is relatively sufficient, and the used tools are relatively abundant; the accumulated slurry between the back of the cutter disc and the wall of the soil bin is cleaned, the space is narrow, only a small pneumatic pick can be used for breaking, and the breaking area is limited by the length of a pneumatic pick drill rod. So that the cleaning range is 0.5m upwards, and the left and right 2.5m respectively cannot be cleaned; the cutter head outer cambered surface and the cutter head front-tunnel face do not have operation space in the initial operation process, if the cleaning of the cutter head inside is completed, the cutter head outer cambered surface and the cutter head front-tunnel face are removed by planing the No. 8 bucket, the planing position is used as the operation face, the cutter head front and the outer cambered surface are cleaned by downwards carrying out the breaking in the mode of water-drilling and drilling, the cutter head inner 6-point operation space is limited to be narrow, the small water-drilling and drilling is used for downwards taking holes and the small air pick is used for cleaning in the mode of breaking to two sides, and the efficiency is low. The clean up of the working time node requirements cannot be accomplished.
Aiming at the situation, the project personnel adopt the method to clean the cutterhead, and the specific cleaning process is as follows:
S1, breaking slurry blocks in each bin by using equipment such as an air gun, an air pick water mill drill and the like in a cutter head so as to reduce the unbalance of the quality of the cutter head caused by accumulated solidification; meanwhile, the inside of the hob cutter box of the wrapped area is cleaned, slurry accumulated in the cutter box is broken through the air pick, the hob cutter is planed, and the condition that the slurry accumulated in the cutter box is solidified when the cutterhead rotates is avoided, and tangential stress exists on the cutterhead.
S2, cleaning the back of the cutterhead: disassembling a cover plate at a reserved opening of the screw machine, breaking slurry accumulated between the back surface of the cutter disc and a soil bin partition plate through a high-pressure water knife, and manually bagging and transferring broken slag to a storage battery car to be transported out of a tunnel; adding a proper amount of carborundum into water flow in the process of using a high-pressure water jet to increase the cutting force of the water jet to break slurry; after the breaking of the range of 2 meters around the reserved opening of the screw machine is completed, gradually weakening the breaking effect towards the edge area of the cutter head, and failing to meet the requirements; the residual solidified grouting material is drilled into a small hole of 5cm by using a water mill drill of the lengthened drill rod, then a hydraulic splitting rod is used for presplitting, finally a pneumatic pick lengthened drill bit is used for breaking, and manual cleaning and outward transportation are performed.
S3, cleaning the outer cambered surface of the cutterhead and the front face-tunnel face of the cutterhead;
(1) Removing the last annular pipe slice of the shield tail, and planing a 1.8 x 1.8m free surface at the 6 point position of the shield tail;
(2) Excavating downwards for 1.8m by using a large water mill drill at the position of the shield tail free surface to form a vertical channel, as shown in figure 3; the vertical channel is excavated by downwards excavating the shield tail twice in a mode of downwards taking holes through a water mill drill, an excavation schematic diagram is shown in fig. 4 (the marks 5 in fig. 4 are holes downwards taking holes through the water mill drill), after the water mill drill holes are formed, stone blocks are pre-cracked through a splitting machine, the middle big stone blocks are broken off as soon as the splitting rod is extruded, and then the big stone blocks are broken into small blocks to be taken out and conveyed to the outside;
(3) After the vertical channel is excavated, the horizontal channel is formed by excavating the vertical channel forwards to the face of the cutterhead along the tunneling direction, the excavation length is 8m, and the excavation distance is shown in fig. 6; the concrete excavation of the horizontal channel is that after the excavation of the working face of the vertical channel is completed at the shield tail, a bracket is built through a steel pipe, a large-scale terrazzo drill is born to carry out hole taking in the tunneling direction until reaching the lower part of a cutter head, a horizontal forward excavation schematic diagram is shown in fig. 5 (circles indicated by reference numeral 5 in fig. 5 are all holes taken forward by the terrazzo drill), a circle of holes are taken out at the periphery, a plurality of holes are taken in the middle, then a splitting rod is used for extrusion, a middle large stone block is broken, and then the large stone block is broken into small blocks to be taken out; the bottom layer is excavated and belongs to breeze tuff, the strength reaches 98MPa, the drill bit is worn greatly in the process of taking holes of a large-scale water mill drill, and the water mill drill steel cylinder is welded with 32M special front A-2 teeth in a high-frequency induction heating mode, so that the site maintenance of the water mill drill cylinder is realized;
(4) After the horizontal channel is excavated in the step (3), as shown in fig. 7, water grinding and drilling, hole taking and core taking and expanding excavation are performed on the left side and the right side of the edge of the cutterhead right below the cutterhead to completely remove concrete on the edge of the cutterhead, so that sufficient working space and working face are provided for completing the cutterhead cleaning work; after the working face reaches the right lower part of the cutter disc, holes are formed in the upper directions of two sides by using a drill bit with the diameter of 165mm, the depth of each hole is 50cm, the right lower part of the cutter disc is hollowed in a mode of 1.1 m in channel diameter, a channel with the diameter of 1.1 m is formed, and after the channel is formed, the residual residues at the edge of the cutter disc are cleaned up by reinforcing a long drill rod through an air pick and an air pick.
S4, erecting 2 200-ton jacks at the reserved opening of the screw machine at the back of the cutterhead to assist the cutterhead to rotate, if the cutterhead can rotate, getting rid of the trouble, and if the cutterhead cannot move, continuing to dig the two sides under the front shield until the wrapped area is cleaned up.
In the embodiment, the cutter head is cleaned completely in 2022 in 12 months and 15 days, the slurry accumulated in the cutter head is cleaned completely, the back plate of the cutter head, the front face-palm face of the cutter head and the outer cambered surface of the cutter head are cleaned completely, and 44 minutes later in the day are required, and the cutter head is driven by a cutter head motor and driven by a screw machine opening auxiliary jack to rotate. After the trial rotation is completed, the auxiliary jack support at the bottom of the cutterhead is cut off; the method comprises the following steps of (1) carrying out forward and reverse rotation for one circle at 0.40 minutes in the morning on 12 months and 16 days; the tunneling is started from the beginning of the test at the time of 1 to 17 minutes, the progressive speed is 75mm, the rotating speed of the cutter disc is 3.6r/min, the thrust is gradually increased from 20000kN to 45000kN, and the torque of the cutter disc is 1600kNm. After the prop installation and shield tail recovery are completed, tunneling is started in 12 months and 19 days 21, the tunneling speed is continuous, the thrust force continuously drops to a normal value, and the escape is successful.
In the embodiment, high-efficiency breaking of slurry blocks in a limited space is realized by using high-pressure high-jet-speed water flow and quartz sand, but the operation strength of the slurry blocks is greatly reduced along with the extension of breaking distance, so that the cleaning requirement cannot be met. The space is limited in the process of drilling downwards in the cutter head to obtain the working surface, so that the working efficiency is low. Finally, a channel with a shield tail forward set up reaches the right lower part of the cutter head to finish cleaning, and a plurality of water mill drills can be arranged to synchronously and forward take holes by erecting a central positioning bracket; aiming at the abrasion and consumption of the terrazzo drill bit, the team adopts a plum-cutter 32M special front A-2 type feeding 15mm & lt-3 & gt cutter head, realizes terrazzo drill insert through a high-frequency induction heating and powder welding mode, improves the remanufacturing speed of terrazzo drill, and ensures the construction progress.
The foregoing description is of one embodiment of the invention and is thus not to be taken as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (9)
1. The shield cutter head cleaning method is characterized by comprising the following steps of:
S1, cleaning the inside of a cutter head: directly entering the cutter head, and adopting any one or more tools of an air gun, an air pick and a water mill drill to break and clean the pulp blocks in each bin; meanwhile, cleaning the interior of a hob box of the grouting material wrapping area;
S2, cleaning the back of the cutterhead: disassembling a cover plate at a reserved opening of the screw machine, and breaking slurry accumulated between the back surface of a cutter disc and a soil bin partition plate through a high-pressure water knife, wherein in the process of breaking through the high-pressure water knife, silicon carbide is doped into water flow to increase the cutting force of the water knife, and the breaking range of the high-pressure water knife is within the range of 2 meters around the reserved opening of the screw machine; the residual solidified grouting material outside the range of 2 meters around the reserved opening of the screw machine is firstly drilled by adopting a water mill drill of an elongated drill rod, then a hydraulic splitting rod is used for presplitting, and finally an air pick elongated drill bit is used for breaking; the broken slag is transported out of the tunnel;
S3, cleaning the outer cambered surface of the cutterhead and the front-face of the cutterhead:
(1) Removing the last annular pipe slice of the shield tail, and planing an overhead working surface on the shield tail;
(2) Excavating downwards by using a large water mill drill on a shield tail working face in the air to form a vertical channel with the diameter larger than 1.5 m;
(3) After the vertical channel is dug, the vertical channel is dug forward to the face of the cutterhead along the tunneling direction to form a horizontal channel;
(4) After the horizontal channel is excavated in the step (3), water grinding and drilling are performed on the right side and the left side of the edge of the cutterhead along the right side of the edge of the cutterhead, holes are taken, coring and expanding excavation are performed to completely remove concrete on the edge of the cutterhead, and then a pneumatic pick extension bar is used for breaking grouting material on the front side of the cutterhead upwards from the right side of the cutterhead, so that the cutterhead cleaning work is completed;
S4, after the cutterhead cleaning work is finished, erecting a jack at a reserved opening position of a screw machine at the back of the cutterhead to assist the cutterhead to rotate, if the cutterhead can rotate, the cutterhead is successfully released, and if the cutterhead cannot move, the cutterhead continues to be dug to two sides under a front shield until a wrapped area is cleaned.
2. The shield tunneling cutterhead cleaning method according to claim 1, wherein the method comprises the following steps: and in the step S1, the hob cutter box of the grouting material wrapping area is cleaned, the accumulated slurry in the cutter box is specifically broken through the pneumatic pick, the hob cutter is planed, and the tangential stress on the cutter head when the accumulated slurry solidified in the cutter box flows into the cutter box rotates is avoided.
3. The shield tunneling cutterhead cleaning method according to claim 1, wherein the method comprises the following steps: in the step S2, a lengthened drill rod is adopted for water milling and drilling, the drilling diameter is 5cm, and broken slag is transported out of a tunnel through an electric vehicle after being bagged.
4. The shield tunneling cutterhead cleaning method according to claim 1, wherein the method comprises the following steps: in the step (1) of the step S3, a working face with the size of 1.8 x 1.8m is planed at the 6 point position of the shield tail.
5. The shield tunneling cutterhead cleaning method according to claim 1, wherein the method comprises the following steps: in the step (2) of the step S3, the diameter of the vertical channel is 1.6-2 m; the vertical channel is excavated in a mode that the shield tail is drilled downwards through a water mill to take holes, the holes are drilled downwards through the water mill, stone blocks are pre-split through a splitting machine after the water mill is completed, and large stone blocks are broken into small blocks to be taken out and conveyed to the outside.
6. The shield tunneling cutterhead cleaning method according to claim 1, wherein the method comprises the following steps: the excavation length of the horizontal channel in the step (3) of the step S3 is 8-9 m; the concrete excavation of the horizontal channel is that after the excavation of the working face of the vertical channel is completed at the shield tail, a bracket is built through a steel pipe, a bearing large-scale water mill drill is used for taking holes in the tunneling direction until the hole reaches the lower part of a cutter disc, a circle of holes are taken out at the periphery, a plurality of holes are taken out in the middle, and then a splitting machine is used for breaking large stones into small blocks to be taken out.
7. The shield tunneling cutterhead cleaning method according to claim 1, wherein the method comprises the following steps: and in the step (3) of the step S3, the 32M special front A-2 type teeth are welded on the steel cylinder of the terraced drill in a high-frequency induction heating mode.
8. The shield tunneling cutterhead cleaning method according to claim 1, wherein the method comprises the following steps: and (3) after the working surface in the step (4) of the step S3 reaches the right lower part of the cutter head, taking holes by using a drill bit of 165mm to the upper parts of two sides, taking holes for a single time to have the depth of 45-60 cm, and hollowing the right lower part of the cutter head in a mode of 1-1.2 m of channel diameter to form a channel with the diameter of 1-1.2 m, and cleaning the residual residues at the edge of the cutter head through a pneumatic pick and a pneumatic pick reinforced long drill rod after the channel is formed.
9. The shield tunneling cutterhead cleaning method according to claim 1, wherein the method comprises the following steps: and in the step S4, 2 200-ton jacks are erected at the reserved opening position of the screw machine at the back of the cutterhead to assist the cutterhead to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410308716.1A CN118187888A (en) | 2024-03-19 | 2024-03-19 | Shield cutter head cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410308716.1A CN118187888A (en) | 2024-03-19 | 2024-03-19 | Shield cutter head cleaning method |
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