CN102305082B - Method for relieving and cutterhead repairing of shield machine in weathering groove - Google Patents
Method for relieving and cutterhead repairing of shield machine in weathering groove Download PDFInfo
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Abstract
The invention relates to the technical field of tunnel shield construction, in particular to a method for relieving and cutterhead repairing of a shield machine in a weathering groove. By means of the method, the problems of complex process, long construction period, high cost and the like during shield body relieving and cutterhead repairing in conventional construction are solved. The method comprises the steps of: carrying out grouting reinforcement on collapse body in front of a cutterhead, collapse body above the cutterhead, collapse body above shield tail and collapse body of an anchor cable; building water pressure of cut, eliminating counter-force of tunneling, retreating the shield body and relieving the cutterhead; drilling, exploding and repairing caverns, cleaning the excavated bin and repairing internal structure, body structure and accessory structure of the cutterhead to ensure that the shield body recovers tunneling. The method has the advantages of simple process, short construction period, low construction cost, strong applicability and the like. By means of the method, the relieving and the repairing of the cutterhead of the tunnel are successfully completed; the risk that river water backward pouring into the tunnel is avoided; the shield machine can rapidly recovering the normal tunneling; and the favorable economic benefit and social benefit are obtained.
Description
Technical field
The present invention relates to the tunneling shield technical field of construction, be specially the method that a kind of shield machine is got rid of poverty and cutterhead is repaired in Weathered Trough.
Background technology
Along with the development of China's urban construction, the underground constructions such as Underground Rail Transit, cross-river tunnel are increasing, and the shield driving distance in tunnel is also more and more longer.Shield method is a kind of Fully-mechanized job practices of modern constructing tunnel, its plant equipment of mainly using is shield machine, shield machine carries out earth cutting and rubble fragmentation by cutter in tunnel excavating process, but the utilization along with shield method, cracking, girff are out of shape, cave in the locking cutterhead and the phenomenon that can't tunnel happens occasionally shield machine because the cutterhead mud cake weares and teares in Weathered Trough driving, therefore up to the present, cutterhead is got rid of poverty and reparation is identified as global problem in the Weathered Trough landslide body.When running into problems, present common way is to take the active well method, i.e. excavating shaft directly over cutterhead, and the supporting while excavating, excavation is to cutterhead always.Then carry out the shield body and get rid of poverty and the cutterhead reparation, but in practice of construction, Weathered Trough is positioned at the bottom of the river sometimes, has complex process, speed of application is slow, long in time limit, construction cost is high.And in the long distance driving process, the sealing between base bearing and the cutterhead rotary body was easily lost efficacy, and had shortened the application life of main bearing of shield machine, tunneled power after the cutterhead reparation simultaneously and greatly reduced.
Summary of the invention
The present invention carries out in the existing tunnel shield-tunneling construction having complex process, long in time limit, high in cost of production problem when the shield body is got rid of poverty with the cutterhead reparation in order to solve, and the method that a kind of new shield machine is got rid of poverty in Weathered Trough and cutterhead is repaired is provided.
The present invention adopts following technical scheme to realize: the method that a kind of shield machine is got rid of poverty in Weathered Trough and cutterhead is repaired may further comprise the steps:
Step 1, landslide body grouting reinforcement
(1) landslide body in cutterhead the place ahead is reinforced: 1. insert the flexible slip casting iron pipe of tiny rigidity in cutterhead the place ahead landslide body; 2. begin from the bottom up to inject chemical grout; 3. adopt low pressure or with no pressure grouting technique, pressure is controlled at 0～10 kg/cm
2
(2) cutterhead top landslide body is reinforced: 1. hole from the shield machine advance borehole, require to get into landslide body top; 2. progressively inject chemical grout from the left side to the right, reinforce the side of caving in, cutterhead top body; 3. grouting pressure is controlled at below the 0.1MPa, finishes slip casting when slip casting begins pressure is arranged;
(3) shield tail top landslide body is reinforced: 1. electricity consumption is drilled in the above interval boring of shield shell afterbody springing line, and welding Grouting Pipe joint; 2. adopt left and right sides while symmetry progressively to pour into chemical grout, reinforce shield tail top landslide body; 3. grouting pressure slowly increases, and simultaneously the shield tail is carried out settlement monitoring, stops slip casting when moving down appears in the shield tail;
(4) anchor cable landslide reinforcing body: 1. utilize space between the cutterhead spoke, squeeze into the long fibre grouted anchor bar to the Excavation blossom type; 2. in fiber anchor rod, inject chemical grout, landslide reinforcing body and the place ahead basement rock anchoring are integral; 3. grouting pressure is controlled in the 0.1MPa, stops slip casting when the landslide body begins to extrude the chemical grout reactant;
(5) slip casting effect inspection;
Chemical grout described in the above-mentioned steps can be the special CM13 new material in Guan County at least, it is mixed by the 1:1 volume ratio by catalyzer and resin, at least can produce from Qingdao New Yutian Chemical Co., Ltd. and buy, tradition mainly is to be used in the colliery water sealing consolidation, the present invention is applied in it on Tunnel Landslide body grouting and reinforcing first, well more a lot of than polyurethane slip casting effect, reinforce and generate high molecular intensity height, can reach 10MPA, and polyurethane does not have intensity on substantially, through test of many times checking of the present invention, be applicable to the zone of fracture stratum consolidation fully, can satisfy technological requirement fully;
Step 2, shield machine are got rid of poverty
(1) set up otch hydraulic pressure: slip casting is closed native door after finishing, and then injects mud in the excavation storehouse, sets up otch hydraulic pressure at Excavation, and this hydraulic pressure equals the side pressure of Excavation soil layer; (2) eliminate the driving counter-force: when otch hydraulic pressure during greater than the Excavation Water And Earth Pressures, section of jurisdiction, shield tail back is linked into an integrated entity the driving oil cylinder of slowly retracting clockwise from the bottom simultaneously, elimination shield driving counter-force with i iron; (3) the shield body retreats: by progressively increasing otch hydraulic pressure, when acting on otch ring counter-force greater than shield body and soil body frictional force, the shield body stretches out oil cylinder after slowly falling back, and increase driving oil cylinder working-pressure withstands tunnel duct piece; (4) cutterhead is got rid of poverty: adopt idle running cutterhead boring mode, utilization progressively increases moment of torsion and behind several circles, till the cutterhead moment of torsion is reduced to normally, then reduces excavation storehouse water level until cutterhead can dally, and finishes shield body and cutterhead and gets rid of poverty;
The preparation that step 3, cutterhead are repaired
(1) bores quick-fried reparation cavern
Utilize cutterhead spoke gap forwards behind the drilling and blasting in the cutterhead arch, rotating cutter-head is drilling and blasting again, until excavate out the hemispherical hole;
(2) cleaning excavation storehouse
Step 4, cutterhead reparation
(1) the cutterhead internal construction is repaired: take to repair in the excavation storehouse; (2) the cutterhead body construction is repaired; (3) reparation of cutterhead accessory structure: take in cutterhead is repaired the cavern, to carry out Replacement and Repair.
The reparation of described cutterhead body construction may further comprise the steps: (1) V-type panel weld seam processing a. workman enters the cabin and first cutterhead is cleaned, and then butt welded seam carries out defect detecting test, and crackle is carried out identification record; B. bore respectively the aperture of a 5mm in the end of V-type panel crackle; C. after the emptying muddy water that permeates into from crackle of osculum was cut in body front portion, V-type panel cabin, water was rinsed well; D. adopt carbon arc air gouging that back chipping is carried out in the crack and polish; E. the crackle breach that will polish begins to adopt the layering built-up welding to fill and lead up weld seam when being preheating to 250 ℃.F. adopt oil whiting test and ultrasonic testing/ ultrasonic examination dual test, the per pass weld seam connects and to weld three layers and just do for the first time penetrating inspections, remakes for the second time penetrating inspection after weld seam is finished half, is soldered and carries out the ultrasonic testing/ ultrasonic examination check again, discovery weld seam flaw is done over again immediately, until be up to the standards; (2) V-type panel rotary body increases floor: increase the triangle floor in spoke side direction and rotary body connecting place, adopt the crack welding method to make the three integrally welded; (3) the V-type panel increases gusset: increase trapezoidal gusset at spoke panel and axis body face connecting place, adopt the crack welding method to make the three integrally welded; (4) built-up welding is netted wear-resisting: adopt abrasion-resistant welding wire to carry out netted wear-resisting accumulation welding spoke links to each other peripheral 20cm scope with the otch ring within; (5) the otch ring is repaired: a. adopts heating means that distortion otch ring between spoke is corrected or cutting; B. otch ring inside adds steel plate and integrally welded between spoke; C. at the serious place welding wearing plate of otch ring outside deterioration.
Adopt said method that the cutterhead body construction is repaired, the advantage of comparing with original method is to improve welding quality, eliminates the cutterhead crack fully, and it is wear-resisting to have increased simultaneously cutter hub ground, has strengthened cutter hub integral rigidity and intensity, guarantees drivage efficiency.
When described cutterhead is repaired, adopt first removal tool wear detecting system for the sealing between base bearing and the cutterhead rotary body, then with steel plate that both are integrally welded, the cutterhead swivel joint is changed into anchor tip, the rotary body joint is no longer rotated along with the cutterhead rotation.
When described cutterhead is repaired, be welded into grid-like with i iron in the space between adjacent two spokes on the cutterhead.
Compared with prior art, the present invention has the following advantages:
1, adopting low pressure substep grouting and reinforcing landslide body to carry out the shield body with employing otch hydraulic pressure gets rid of poverty, not only stop slurries and entered the excavation storehouse, and consolidation effect is better, using simultaneously otch hydraulic pressure that shield machine was retreated gets rid of poverty, guarantee that again the shield ventral brush is harmless, only used 15 days and just finish shield machine and got rid of poverty and the cutterhead reparation, speed of application be take that active well repairs more than 10 times, greatly shortened the construction period, this technology has the top standard at home and abroad;
2, adopting grouting and reinforcing to carry out the shield body gets rid of poverty and repair cutterhead in the hole, economize on the use of funds 4,000,000 yuan than adopting active well, and it is grid-like to take between two spokes the space to be welded into i iron, and the reinforcing body of guaranteeing to cave in normally is cut, after left and right sides line is repaired not only smoothly by the landslide section, and again through a detrition band, stop the Excavation landslip, greatly reduce circulation and stop up, the driving effect has improved 2 times than in the past, make the tunnel open in advance operation, create considerable economic benefit;
3, before the recovery driving, after the exsector mill decreases detection system, the cutterhead swivel joint is changed into anchor tip, solved main shaft seals inefficacy global problem, prolonged main bearing of shield machine application life, guarantee length and connect smoothly apart from crossing the shield tunnel left and right sides, river line, for some reference provides experience, obtained good social benefit;
4, provide the space in hole of cutterhead the place ahead excavation for repairing cutterhead, technique is simple, construction safety, quality controlled, cost is low;
5, adopt grouting and reinforcing reparation cutterhead in the hole, reduce widely construction area and blowdown, reduce the consumption of the constructional materialss such as steel, cement, meet national energy-saving and reduce discharging policy;
In a word, adopt shield body of the present invention to get rid of poverty and the cutterhead restorative procedure is constructed, have the advantages such as technique is simple, the construction period is short, construction cost is low, applicability is strong, successfully finished getting rid of poverty and repairing of the left and right sides, tunnel line cutterhead, evaded the risk that river pours in down a chimney the tunnel, the fast quick-recovery of shield structure is normally tunneled, obtained good economic benefit and social benefit.
The specific embodiment
The method that a kind of shield machine is got rid of poverty in Weathered Trough and cutterhead is repaired may further comprise the steps:
Step 1, landslide body grouting reinforcement
(1) landslide body in cutterhead the place ahead is reinforced: 1. insert the flexible slip casting iron pipe of tiny rigidity in cutterhead the place ahead landslide body; 2. begin from the bottom up to inject chemical grout, and whether the person of sending someone monitoring have slurries to flow into the excavation storehouse by hole between cutterhead, once find to notify immediately the grouting personnel to stop grouting, and carry out shutoff with cotton, after condensing, continue again in slurries grouting; 3. adopt low pressure or with no pressure grouting technique, pressure is controlled at 0～10 kg/cm
2
(2) cutterhead top landslide body is reinforced: 1. hole from the shield machine advance borehole, require to get into landslide body top; 2. progressively inject chemical grout from the left side to the right, reinforce the side of caving in, cutterhead top body; 3. grouting pressure is controlled at below the 0.1MPa, finishes slip casting when slip casting begins pressure is arranged;
(3) shield tail top landslide body is reinforced: 1. electricity consumption is drilled in the every 2m of shield shell afterbody springing line and bores φ 10 holes, and welding Grouting Pipe joint; 2. adopt left and right sides while symmetry progressively to pour into chemical grout, reinforce shield tail top landslide body; 3. grouting pressure slowly increases, and simultaneously the shield tail is carried out settlement monitoring, stops slip casting when moving down appears in the shield tail;
(4) anchor cable landslide reinforcing body: 1. utilize space between the cutterhead spoke, squeeze into 5m long fibre grouted anchor bar to the Excavation blossom type; 2. in fiber anchor rod, inject chemical grout, landslide reinforcing body and the place ahead basement rock anchoring are integral; 3. grouting pressure is controlled in the 0.1MPa, stops slip casting when the landslide body begins to extrude the chemical grout reactant;
(5) slip casting effect inspection: survey by the radar reinforcing body whether also existence is empty, adopt drilled drawing-core to check the grouting reinforcement degree in the slip casting weak location.If check that the landslide body is high without cavity, percentage of consolidation, finish grouting and reinforcing work, otherwise, continue reinforcement slip casting.
Step 2, shield machine are got rid of poverty
(1) set up otch hydraulic pressure: slip casting is closed native door after finishing, and then injects mud in the excavation storehouse, sets up otch hydraulic pressure at Excavation, and this hydraulic pressure equals the side pressure of Excavation soil layer;
(2) eliminate the driving counter-force: when otch hydraulic pressure during greater than the Excavation Water And Earth Pressures, shield tail back 10 endless tube sheets are linked into an integrated entity the driving oil cylinder of slowly retracting clockwise from the bottom simultaneously, elimination shield driving counter-force with i iron;
(3) the shield body retreats: by progressively increasing otch hydraulic pressure, when acting on otch ring counter-force greater than shield body and soil body frictional force, the shield body slowly falls back and stretches out oil cylinder behind the 10cm, and increases the driving oil cylinder working-pressure and withstand tunnel duct piece;
(4) cutterhead is got rid of poverty: adopt idle running cutterhead boring mode, utilization progressively increases moment of torsion and behind several circles, till the cutterhead moment of torsion is reduced to normally, then reduces excavation storehouse water level until cutterhead can dally, and finishes shield body and cutterhead and gets rid of poverty;
The preparation that step 3, cutterhead are repaired
(1) bores quick-fried reparation cavern
Utilize cutterhead spoke gap forwards behind the drilling and blasting in the cutterhead arch, rotating cutter-head is drilling and blasting again, until excavate out the hemispherical hole of diameter 2000mm, degree of depth 600mm, if rock stability is poor, adopts the i iron temporary supporting;
(2) cleaning excavation storehouse: use pulley that ratchel removing in the excavation storehouse is delivered from godown, foreign material and finger stone bag weaved the hanging outside the storehouse of packing into;
Before above-mentioned two steps, can carry out first cutter head structure inspection and recovery scenario and determine, be specially:
The one, check cutterhead, mainly comprise: 1. the cutterhead internal construction checks: check whether the sealing of cutterhead central rotation body lost efficacy, whether flushing system stops up, whether stirring rod comes off; 2. the cutterhead body construction checks: check cutterhead otch ring abrasion condition with slide calliper rule, detect and lens examination cutterhead V face weld cracking situation by PT; 3. the cutterhead accessory structure checks: by measuring and the girff distortion of abrasion inspection periphery hobboing cutter and the degree of wear, check center cutter tool rest deformation.The 2nd, determine the cutterhead recovery scenario: the cutterhead internal construction is taked to repair in the excavation storehouse, and the cutterhead body construction adds weldering by the increase voussoir and the build-up wear-resistant net is reinforced.The cutterhead accessory structure is taked to carry out Replacement and Repair in hole of excavation, cutterhead the place ahead.
Step 4, cutterhead reparation
(1) the cutterhead internal construction is repaired: take to repair in the excavation storehouse, concrete steps are:
1. serious wear or the stirring rod that come off are welded again;
2. clear up washing away system pipeline, utilize simultaneously water under high pressure to dredge;
3. adopt first removal tool wear detecting system for the sealing between base bearing and the cutterhead rotary body, then with steel plate that both are integrally welded, the cutterhead swivel joint is changed into anchor tip, the rotary body joint is no longer rotated along with the cutterhead rotation, solve swivel joint seal failure technical barrier.
(2) the cutterhead body construction is repaired, and concrete steps are:
1. V-type panel weld seam is processed a. workman and is entered the cabin and first cutterhead is cleaned, and then butt welded seam carries out defect detecting test, and crackle is carried out identification record; B. bore respectively the aperture of a 5mm in the end of V-type panel crackle; C. after the emptying muddy water that permeates into from crackle of osculum was cut in body front portion, V-type panel cabin, water was rinsed well; D. adopt carbon arc air gouging that back chipping is carried out in the crack and polish; E. the crackle breach that will polish begins to adopt the layering built-up welding to fill and lead up weld seam when being preheating to 250 ℃.F. adopt oil whiting test and ultrasonic testing/ ultrasonic examination dual test, the per pass weld seam connects and to weld three layers and just do for the first time penetrating inspections, remakes for the second time penetrating inspection after weld seam is finished half, is soldered and carries out the ultrasonic testing/ ultrasonic examination check again, discovery weld seam flaw is done over again immediately, until be up to the standards;
2. V-type panel rotary body increases floor: increase triangle floor (st52-3 steel) in spoke side direction and rotary body connecting place, adopt the crack welding method to make the three integrally welded;
3. the V-type panel increases gusset: increase trapezoidal gusset (st52-3 steel) at spoke panel and axis body face connecting place, adopt the crack welding method to make the three integrally welded;
4. built-up welding is netted wear-resisting: adopt the cr-ni-si-mn-mo abrasion-resistant welding wire to carry out netted wear-resisting accumulation welding spoke links to each other peripheral 20cm scope with the otch ring within;
5. the otch ring is repaired: a. adopts heating means that distortion otch ring between spoke is corrected or cutting; B. otch ring inside adds steel plate and integrally welded between spoke; C. at the serious place welding wearing plate of otch ring outside deterioration.
(3) reparation of cutterhead accessory structure: take to carry out Replacement and Repair in cutterhead is repaired the cavern, concrete steps are:
1. peripheral hobboing cutter girff is changed: a. carries out processing and fabricating to the girff of changing in factory according to shield structure design drawing, and carries out sign and transport to the building site; B. utilize cavern, cutterhead the place ahead, carry out grinding process behind the excision distortion of employing oxygen welding or the wearing and tearing girff; C. according to the drawing location dimension new girff is installed, is adopted measurement means and accurately locate by symmetrical spot welding measure; D. adopt the symmetrical built-up welding of cross stratification to weld new girff, guarantee that weldment is heated evenly, avoid workpiece owing to the inequality of being heated causes displacement; E. welding is installed new cutter after checking and accepting immediately, and carries out the replacing of next girff by rotating cutter-head.
2. periphery protection cutter is changed: press the new periphery protection cutter of drawing location dimension welding behind the periphery protection cutter that a. adopts the carbon arc air gouging removing to damage; B. around periphery protection cutter, add the wear-resisting net of weldering.
Case history:
The tunnel is newly-built lion ocean is positioned at the middle and south, Guangdong Province in high-speed railway special line Guangzhou, wide Shenzhen and Hong Kong to Shenzhen Section, is the quick path that connects Hong Kong interiorly.Be positioned at the tunnel, lion ocean of Guangzhou Nansha District, each long 10.8 kilometers on left and right line, the little brave drop of Tunnel Passing, three water channels of husky young drop and lion ocean are present domestic mileage is the longest, construction standard is the highest First railway tunnel under water.Tunnel, lion ocean total length 10.8 kms, 350 kilometers of speed per hour desired values are worn Jiang Yueyang three times.Wherein lion foreign-water face width is 3300 meters, and the depth of water reaches 26.6 meters, is the main channel of Zhujiang River shipping, and design hydraulic pressure reaches 0.67MPa, is the domestic major diameter slurry shield long distance driving that adopts in the rock stratum of soft or hard inequality first.
In September, 2010, the tunnel entrance left and right sides, lion ocean line shield machine in the Weathered Trough driving owing to the cutterhead mud cake cracking that weares and teares, the girff distortion, landslide locking cutterhead and can't tunneling, the inside and outside well-known expert of host country is to on-the-spot, thought by the expert and can't get rid of poverty and repair, suggestion is torn machine open and is changed Mining Method into, adopting kinds of schemes to attempt to get rid of poverty all comes a howler, carry out the shield body technology of getting rid of poverty by adopting low pressure of the present invention to reinforce step by step with adopting otch hydraulic pressure, adopt simultaneously the cavern to repair the method for cutterhead, and adding weldering grid technology between the cutterhead spoke comes back to life left and right sides line shield machine, return to normal driving, guarantee length and connect smoothly apart from crossing the shield tunnel left and right sides, river line, and before recovering driving, after the exsector mill decreases detection system, the cutterhead swivel joint is changed into anchor tip, solved main shaft seals inefficacy global problem, prolonged main bearing of shield machine application life, successfully finished getting rid of poverty and repairing of left and right sides line cutterhead, evaded the risk that river pours in down a chimney the tunnel, make two shield structures recover normal driving, good economic benefit and social benefit have been obtained, created a miracle at home and abroad, this working skill of sufficient proof is advanced, applicability is strong, and promotion prospect is good.
Claims (2)
1. the method that a shield machine is got rid of poverty in Weathered Trough and cutterhead is repaired is characterized in that may further comprise the steps:
Step 1, landslide body grouting reinforcement
(1) landslide body in cutterhead the place ahead is reinforced: 1. insert the flexible slip casting iron pipe of tiny rigidity in cutterhead the place ahead landslide body; 2. begin from the bottom up to inject chemical grout; 3. adopt low pressure or with no pressure grouting technique, pressure is controlled at 0～0.98MPa;
(2) cutterhead top landslide body is reinforced: 1. hole from the shield machine advance borehole, require to get into landslide body top; 2. progressively inject chemical grout from the left side to the right, reinforce cutterhead top landslide body; 3. grouting pressure is controlled at below the 0.1MPa, finishes slip casting when slip casting begins pressure is arranged;
(3) shield tail top landslide body is reinforced: 1. electricity consumption is drilled in the above interval boring of shield shell afterbody springing line, and welding Grouting Pipe joint; 2. adopt left and right sides while symmetry progressively to pour into chemical grout, reinforce shield tail top landslide body; 3. grouting pressure slowly increases, and simultaneously the shield tail is carried out settlement monitoring, stops slip casting when moving down appears in the shield tail;
(4) anchor cable landslide reinforcing body: 1. utilize space between the cutterhead spoke, squeeze into the long fibre grouted anchor bar to the Excavation blossom type; 2. in fiber anchor rod, inject chemical grout, landslide reinforcing body and the place ahead basement rock anchoring are integral; 3. grouting pressure is controlled in the 0.1MPa, stops slip casting when the landslide body begins to extrude the chemical grout reactant;
(5) slip casting effect inspection;
Step 2, shield machine are got rid of poverty
(1) set up otch hydraulic pressure: slip casting is closed native door after finishing, and then injects mud in the excavation storehouse, sets up otch hydraulic pressure at Excavation, and this hydraulic pressure equals the side pressure of Excavation soil layer;
(2) eliminate the driving counter-force: when otch hydraulic pressure during greater than the Excavation Water And Earth Pressures, section of jurisdiction, shield tail back is linked into an integrated entity the driving oil cylinder of slowly retracting clockwise from the bottom simultaneously, elimination shield driving counter-force with i iron;
(3) the shield body retreats: by progressively increasing otch hydraulic pressure, when acting on otch ring counter-force greater than shield body and soil body frictional force, the shield body stretches out oil cylinder after slowly falling back, and increase driving oil cylinder working-pressure withstands tunnel duct piece;
(4) cutterhead is got rid of poverty: adopt idle running cutterhead boring mode, progressively increase moment of torsion and behind several circles, till the cutterhead moment of torsion is reduced to normally, then reduce excavation storehouse water level until cutterhead can dally, finish shield body and cutterhead and get rid of poverty;
The preparation that step 3, cutterhead are repaired
(1) bores quick-fried reparation cavern
Utilize cutterhead spoke gap forwards behind the drilling and blasting in the cutterhead arch, rotating cutter-head is drilling and blasting again, until excavate out the hemispherical hole;
(2) cleaning excavation storehouse;
Step 4, cutterhead reparation
(1) the cutterhead internal construction is repaired: take to repair in the excavation storehouse;
(2) the cutterhead body construction is repaired;
(3) reparation of cutterhead accessory structure: take in cutterhead is repaired the cavern, to carry out Replacement and Repair;
When (4) cutterhead is repaired, adopt first removal tool wear detecting system for the sealing between base bearing and the cutterhead rotary body, then with steel plate that both are integrally welded, the cutterhead swivel joint is changed into anchor tip, the rotary body joint is no longer rotated along with the cutterhead rotation, when cutterhead is repaired simultaneously, be welded into grid-like with i iron in the space between adjacent two spokes on the cutterhead.
2. the method that a kind of shield machine according to claim 1 is got rid of poverty in Weathered Trough and cutterhead is repaired is characterized in that the reparation of described cutterhead body construction may further comprise the steps:
(1) V-type panel weld seam is processed
A. the workman enters the cabin and first cutterhead is cleaned, and then butt welded seam carries out defect detecting test, and crackle is carried out identification record;
B. bore respectively the aperture of a 5mm in the end of V-type panel crackle;
C. after the emptying muddy water that permeates into from crackle of osculum was cut in body front portion, V-type panel cabin, water was rinsed well;
D. adopt carbon arc air gouging that back chipping is carried out in the crack and polish;
E. the crackle breach that will polish begins to adopt the layering built-up welding to fill and lead up weld seam when being preheating to 250 ℃;
F. adopt oil whiting test and ultrasonic testing/ ultrasonic examination dual test, the per pass weld seam connects and to weld three layers and just do for the first time penetrating inspections, remakes for the second time penetrating inspection after weld seam is finished half, is soldered and carries out the ultrasonic testing/ ultrasonic examination check again, discovery weld seam flaw is done over again immediately, until be up to the standards;
(2) V-type panel rotary body increases floor
Increase the triangle floor in spoke side direction and rotary body connecting place, adopt the crack welding method to make the three integrally welded;
(3) the V-type panel increases gusset
Increase trapezoidal gusset at spoke panel and axis body face connecting place, adopt the crack welding method to make the three integrally welded;
(4) built-up welding is netted wear-resisting
Linking to each other peripheral 20cm scope with the otch ring within, adopt spoke abrasion-resistant welding wire to carry out netted wear-resisting accumulation welding;
(5) the otch ring is repaired
A. adopt heating means that distortion otch ring between spoke is corrected or cutting;
B. otch ring inside adds steel plate and integrally welded between spoke;
C. at the serious place welding wearing plate of otch ring outside deterioration.
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| CN201110207097XA CN102305082B (en) | 2011-07-23 | 2011-07-23 | Method for relieving and cutterhead repairing of shield machine in weathering groove |
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| CN201110207097XA CN102305082B (en) | 2011-07-23 | 2011-07-23 | Method for relieving and cutterhead repairing of shield machine in weathering groove |
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