CN103032071A - Shield receiving forward-shift construction method of boulder group open excavation and embedment mutation space - Google Patents
Shield receiving forward-shift construction method of boulder group open excavation and embedment mutation space Download PDFInfo
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- CN103032071A CN103032071A CN2012105231291A CN201210523129A CN103032071A CN 103032071 A CN103032071 A CN 103032071A CN 2012105231291 A CN2012105231291 A CN 2012105231291A CN 201210523129 A CN201210523129 A CN 201210523129A CN 103032071 A CN103032071 A CN 103032071A
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Abstract
The invention relates to the technical field of tunnel shield construction and particularly provides a shield receiving forward-shift construction method of a boulder group open excavation and embedment mutation space. The problem that a shield cannot be normally received and hoisted out by shifting forward to a station by using the traditional method in conventional construction can be solved. The shield receiving forward-shift construction method comprises the following steps of: digging a boulder group open excavation and embedment section; forming a transition curve by a refilled receiving well as a large-slope curve with the open excavation and embedment section, and receiving and shifting forward the shield with the large-slope curve; and shifting forward the entire shield in the open excavation and embedment section, paving a back-up transition rail bar and a transition guide rail on the large-slope curve, shifting forward the entire shield by using a movable counter-force device and an oil cylinder of a shield machine, and shifting forward and respectively paving a forward-shift guide rail and a back-up forward-shift guide rail of a shield body on the open excavation and embedment section simultaneously. With the adoption of the shield receiving forward-shift construction method provided by the invention, the section tunneling mission is smoothly completed by the shield; a curve shield receiving process is started; and a technology of forward shifting the entire machine when the shield is backed up without the rail bar is innovated. The shield receiving forward-shift construction method has the advantages of simple process, low construction cost, flexible construction method and the like.
Description
Technical field
The present invention relates to the tunneling shield technical field of construction, be specially a kind of boulder group open cut and secretly bury sudden change space shield structure reception reach job practices.
Background technology
Along with urban track traffic is fast-developing, south and coastal city also begin to build subway mostly, yet, building the subway greatest difficulty in these places is exactly that the interval has a large amount of boulders, this stratum is the forbidden zone of Shield Construction Method Used, if facing the shield structure, advanced processing not, shield-tunneling construction damage risk.
Yet, in order to ensure construction safety, one section away from station dark buriing worker of boulder group location employing open cut be, for reduce cost, the open cut secretly section of burying base plate is maximum higher 1.6 meters than shield structure received well base plate, because received well is shorter than shield structure main frame, causes the shield structure normally to receive and to move forward, adopt existing job practices all can't solve this difficult problem, make a concrete analysis of as follows:
One, can't level receive rear reach,
Can't the continuation level after the reception reach: because received well and interconnection be at same plane, received well is than the low 1.6m of interconnection base plate, and the discrepancy in elevation is larger.And shield structure received well length conventional design only has 10m, shield body and screw machine overall length 12.5m, shield cutter receives and to be advanced to open cut secretly during the section of burying termination, screw machine also has 2.5 meters in the tunnel, reach can't continue this moment, level needs again jacking reach that just can continue above 1.6 meters after receiving, because screw machine only has the 0.8m space from the top, tunnel, if jacking, must remove screw machine, otherwise screw machine will withstand shield tunnel, because screw machine is oblique insertion shield body, also can't remove in the tunnel.Therefore, can't level receive rear reach.
Two, can't adopt the inclined-plane to receive
The shield body can't be transitioned into the inclined-plane: because the received well drilling well only has 10m long, arrive 1.6m with the interconnection base plate discrepancy in elevation, if adopt the inclined-plane to receive, the gradient reaches 16%, and reception portal and the larger knuckle of inclined-plane formation, will title after cutterhead is appeared, be connected by base bearing between cutterhead and the shield body, cutterhead is wanted title, the shield body also will come back, also in the soil body, anterior shield and middle shield are without hinged to the shield body, can't realize at all at this moment.
The shield body can't move forward on the inclined-plane: owing to can not swing up and down between shield body and the connecting bridge, can realize that the shield body receives on the inclined-plane and also will remove first connecting bridge, but face when the shield structure moves forward on inclined-plane, so large ground and can head on last a few endless tube sheet, cause the reach of shield body must destroy the section of jurisdiction, not destroying section of jurisdiction shield body just can't front mobile situation.
Three, can't receive the rear reach of disintegrating
Cutterhead disintegration difficulty is large: because received well is at enclosure space, headway is limited, and the strong point that hangs cutterhead when removing cutterhead is difficult to look for, and therefore, removes the cutterhead difficulty larger.
Can't remove screw machine: above two kinds of methods all can't realize, just disintegrate if adopt cutterhead to be advanced to acceptance frame, next could disintegration shield body or need to remove first behind the screw machine, after even cutterhead disintegrates, also in the tunnel, tunnel space is little for screw machine, also can't normally remove screw machine.
The shield body disintegration that can't move forward: because cutterhead draws except the shield-tunneling construction electricity consumption of breaking of front needs, at this moment caused shield propelling system to work, therefore, the shield body has been received in the reach process disintegrate, also can't carry out pipe sheet assembling.
Four, secretly reach difficulty in the section of burying space is large in open cut
Can't adopt the dolly reach: open cut is the section of burying free height 6.4m secretly, and the shield machine diameter is 6.28m, if adopt conventional dolly to receive, little height has surpassed 0.2 m.Dolly and shield height summation have surpassed the secretly section of burying headroom of open cut, therefore, can't adopt dolly to carry out the reach of shield body.
Can't adopt the cylinder reach: so-called cylinder reach, below dolly, lay exactly cylinder, the power of reducing friction, dolly and roller height surpass 0.3m, and cylinder and shield height summation have surpassed the secretly section of burying headroom of open cut.Therefore, can't adopt cylinder to carry out the reach of shield body.
Leading platform reach faces and can't pass through risk: since cutterhead and open cut secretly the section of burying push up and only have the 0.12m space, employing lead platform at least will be behind base plate paving 0.1 m plain concrete, platform is led in the both sides construction, the shield body from open cut secretly the section of burying top board only have 2cm, the reach space is less like this, difficulty is larger, and operation requirements is high.If construction error is large, will faces and to pass through risk.
In a word, adopt conventional method to receive and also can't realize disintegrating, realize receiving, can only development new technologies, transform operating mode.Up to the present, also there is not open cut secretly to bury the case that sudden change space shield structure receives the reach construction.
Summary of the invention
The present invention is existing when running into boulder group open cut and secretly burying sudden change space shield-tunneling construction in order to solve, adopt conventional method all can't carry out the shield structure and normally receive and be advanced to the problem that the station hangs out, provide a kind of boulder group open cut secretly to bury sudden change space shield structure and receive the reach job practices.
The present invention adopts following technical scheme to realize: a kind of boulder group open cut is secretly buried sudden change space shield structure and is received the reach job practices, may further comprise the steps:
Step 2: heavy grade curved surface shield structure receives
A, with concrete the received well backfill is performed into the heavy grade curved surface, with open cut secretly the section of burying form fillet surface;
After B, shield structure are abolished diaphragm wall, lay shield body reception guide rail at the heavy grade curved surface and carry out the reception of shield structure; C, central shield expose portal three/a period of time and weld front wheel, open simultaneously the hinged oil cylinder of shield structure; D, weld shield body rear roller when the shield tail exposes portal three/a period of time, after the nullring pipe sheet assembling is complete, with i iron last a few endless tube sheets are linked into an integrated entity, utilize shield structure oil cylinder that the shield tail is released portal and finish the shield structure and receive;
Supporting and connecting bridge junction lower bolt after A, the dismounting; B, the interim section of jurisdiction of assembly unit, employing bottom make the shield tail be advanced to the secretly section of burying of open cut; C, transport outside the hole with battery truck after removing the interim section of jurisdiction of assembly unit, bottom with segment crane;
Step 4: the secretly section of burying shield structure complete machine reach of open cut
A, after the heavy grade curved surface is laid the supporting transition section of track; B, after establish on rear supporting transition section of track upper berth supporting transition guide, make rear supporting transition guide be transitioned into open cut secretly on the section of the burying base plate; C, employing packaged type counterforce device are installed on the guide rail of shield tail back; D, utilize shield machine self oil cylinder to withstand on to make on the counterforce device before the shield structure complete machine mobile, while move forward open cut secretly the section of burying lay respectively shield body move forward guide rail and rear supporting reach guide rail; E, after moving on to the station hoisting port, the shield structure removes the transition section of track.
Compared with prior art, the present invention has the following advantages:
1, adopts open cut to process the boulder group, solved the technical barrier that ground blasting can't 100% be processed boulder, stopped shield-tunneling construction and shut down risk, accelerated the logical speed of application in hole;
2, open cut secretly the section of burying base plate directly be designed to run the train rail base plate, reduce cutting depth, reduce the excavation risk, realize not needing a large amount of concrete of backfill after the shield structure misses the stop, greatly reduce construction cost;
3, by behind the backfill heavy grade surface blending, utilize roller and shield structure body self articulated mounting, realized that shield structure curved surface receives, having solved conventional method can't be in the floor level space reception technique difficult problem of suddenling change;
4, utilize the interim segment assembly in bottom and dismounting connecting bridge lower bolt, realize the reach of shield structure body heavy grade curved surface, traditional front shifting method tractive force deficiency and shield structure body and the rear supporting technical barrier that can't swing up and down have been solved, the employing segment crane is removed interim segment assembly and is transported outside the hole with battery truck, easy construction, to the section of jurisdiction without damage;
5, use the transition section of track and remove the connecting bridge lower bolt, secretly the supporting section of track that do not need just can the complete machine reach after the section of burying to have realized open cut, has solved that traditional shield structure moves forward, the technical barrier of the interim section of track of rear supporting needs;
In a word, adopt boulder group of the present invention open cut secretly to bury sudden change space shield structure and receive the reach job practices, realized that the shield structure finishes interval driving task smoothly, started heavy grade curved surface shield structure receiving process, the supporting section of track that do not need is with regard to energy complete machine reach technology after having reformed the shield structure, create the shield structure at the boulder group open cut quick new record of reach of the section of burying sudden change space shield structure complete machine secretly, reduced secretly 2 meters of the section of burying cutting depths of open cut.Have the advantages such as technique is simple, construction cost is low, job practices is flexible, adopt this technology successfully to finish station, Line 2 Metro lotus square, Changsha to the left and right sides, the May I Square station line boulder group open cut section of burying receiving end secretly, fill up China's boulder group open cut and secretly buried the technological gap that sudden change space shield structure receives the reach construction, obtained good economic benefit and social benefit.This method is applicable to the shield structure and secretly buries engineering by boulder group open cut, also is suitable for the shield structure by the Mining Method construction of tunnel.
Description of drawings
Fig. 1 is that shield machine curved surface of the present invention receives schematic diagram;
Fig. 2 of the present inventionly supportingly is being transitioned into the secretly section of burying reach schematic diagram of open cut afterwards;
Fig. 3 is Fig. 2 rear elevation;
Among the figure: the 1-received well; The 2-open cut is the section of burying base plate secretly; The 3-open cut is the section of burying top board secretly; 4-heavy grade curved surface; The 5-diaphragm wall; 6-shield body receives guide rail; The 7-front wheel; The hinged oil cylinder of 8-shield structure; The 9-rear roller; 10-shield driving oil cylinder; The 11-lower bolt; The supporting transition section of track behind the 12-; Supporting transition guide behind the 13-; The 14-counterforce device; 15-shield tail; 16-shield body reach guide rail; Supporting reach guide rail behind the 17-.
A kind of boulder group of specific embodiment open cut is secretly buried sudden change space shield structure and is received the reach job practices, may further comprise the steps:
A, continuous wall trench adopt the hydraulic grooving machine construction; B, at shield structure receiving terminal configuration glass fiber muscle 1, all the other location configuration reinforcements carry out concreting; C, excavation limit, construction concrete support back supporting steel support; D, excavation are abolished with the expansion explosive after boulder adopts artificial boring; E, excavation on earth after, establish the received well 1 of long 10m in the termination, the secretly section of burying base plate 2 of open cut begins to construct; Carry out the secretly section of burying top board 3 constructions of open cut behind F, the construction side wall;
Step 2: heavy grade curved surface shield structure receives, as shown in Figure 1,
A, with low slump concrete with install circular formwork outward the received well backfill performed into the secretly section of burying formation fillet surface of heavy grade curved surface 4 and open cut;
After B, shield structure are abolished diaphragm wall 5, lay shield body reception guide rail 6 at the heavy grade curved surface and carry out the reception of shield structure; C, central shield expose portal three/a period of time and weld front wheel 7, open simultaneously the hinged oil cylinder 8 of shield structure; D, weld shield body rear roller 9 when the shield tail exposes portal three/a period of time, after the nullring pipe sheet assembling is complete, with i iron last a few endless tube sheets are linked into an integrated entity, utilize shield driving oil cylinder 10 that the shield tail is released portal and finish the shield structure and receive;
Supporting and connecting bridge junction lower bolt 11 after A, the dismounting; B, the interim section of jurisdiction of assembly unit, employing bottom make the shield tail be advanced to the secretly section of burying of open cut; C, transport outside the hole with battery truck after removing the interim section of jurisdiction of assembly unit, bottom with segment crane;
Step 4: the secretly section of burying shield structure complete machine reach of open cut, shown in Fig. 2,3,
A, after the heavy grade curved surface is laid the supporting transition section of track 12; B, after establish on rear supporting transition section of track upper berth supporting transition guide 13, make rear supporting transition guide be transitioned into open cut secretly on the section of the burying base plate; C, employing packaged type counterforce device 14 are installed on the shield tail 15 back guide rails; D, utilize shield machine self oil cylinder to withstand on to make on the counterforce device before the shield structure complete machine mobile, while move forward open cut secretly the section of burying lay respectively shield body move forward guide rail 16 and rear supporting reach guide rail 17; E, after moving on to the station hoisting port, the shield structure removes the transition section of track.
Case history:
Because the open cut secretly section of burying base plate is higher 1.6 meters than shield structure reception base plate, can't carry out moving before traditional shield structure receives, by becoming heavy grade surface blending face at received well with concrete backfill, left line shield structure uses roller and utilizes the hinged oil cylinder of shield structure to realize that the heavy grade curved surface receives, and adopts the interim section of jurisdiction of assembly unit, bottom and remove the connecting bridge lower bolt shield structure main frame is moved forward at the heavy grade curved surface.According to rear supporting and open cut secretly the section of the burying discrepancy in elevation install the transition section of track, utilize behind the supporting guide rail after laying removable counterforce device make shield structure main body and rear supporting open cut secretly the section of burying base plate directly lay track and just can move forward fast by complete machine.Adopt the method for the invention to realize that boulder group open cut secretly buries sudden change space shield structure and receive the reach construction, prove this advanced technology.
Right line adopts left line mode speed of advancement faster, has realized the 50 meters good results that can move forward in a day.Sufficient proof method construction of the present invention is flexible, and applicability is strong.Secretly the section of burying is than the high technical barrier that can't normally receive and move forward of shield structure reception to have solved boulder group open cut, and therefore, method promotion prospect of the present invention is good.
Claims (1)
1. boulder group open cut is secretly buried sudden change space shield structure and is received the reach job practices, it is characterized in that may further comprise the steps:
Step 1, boulder group open cut be the section of burying excavation secretly, excavation on earth after, establish long 10m received well (1) in the termination, the secretly section of the burying base plate (2) of open cut that begins to construct carries out the secretly section of burying top board (3) construction of open cut behind the construction side wall;
Step 2: heavy grade curved surface shield structure receives
A, with concrete the received well backfill is performed into heavy grade curved surface (4), with open cut secretly the section of burying form fillet surface;
B, shield structure carry out the reception of shield structure at heavy grade curved surface laying shield body reception guide rail (6) after abolishing diaphragm wall (5); C, central shield expose portal three/a period of time and weld front wheel (7), open simultaneously the hinged oil cylinder of shield structure (8); D, weld shield body rear roller (9) when the shield tail exposes portal three/a period of time, after the nullring pipe sheet assembling is complete, with i iron last a few endless tube sheets are linked into an integrated entity, utilize shield driving oil cylinder (10) that the shield tail is released portal and finish the shield structure and receive;
Step 3, the reach of heavy grade curved surface shield structure
Supporting and connecting bridge junction lower bolt (11) after A, the dismounting; B, the interim section of jurisdiction of assembly unit, employing bottom make the shield tail be advanced to the secretly section of burying of open cut; C, transport outside the hole with battery truck after removing the interim section of jurisdiction of assembly unit, bottom with segment crane;
Step 4: the secretly section of burying shield structure complete machine reach of open cut
A, after the heavy grade curved surface is laid the supporting transition section of track (12); B, after establish on rear supporting transition section of track upper berth supporting transition guide (13), make rear supporting transition guide be transitioned into open cut secretly on the section of the burying base plate; C, employing packaged type counterforce device (14) are installed on the guide rail of shield tail (15) back; D, utilize shield machine self oil cylinder to withstand on to make on the counterforce device before the shield structure complete machine mobile, while move forward open cut secretly the section of burying lay respectively shield body move forward guide rail (16) and rear supporting reach guide rail (17); E, after moving on to the station hoisting port, the shield structure removes the transition section of track.
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| CN201210523129.1A CN103032071B (en) | 2012-12-09 | 2012-12-09 | Shield receiving forward-shift construction method of boulder group open excavation and embedment mutation space |
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| CN201210523129.1A CN103032071B (en) | 2012-12-09 | 2012-12-09 | Shield receiving forward-shift construction method of boulder group open excavation and embedment mutation space |
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| CN103790594A (en) * | 2014-02-26 | 2014-05-14 | 中铁一局集团有限公司 | Method for exploring and processing interior of boulder hole in front for shield method construction |
| CN104594911A (en) * | 2015-02-16 | 2015-05-06 | 中建交通建设集团有限公司 | Construction method of close-range down-traversing operation lines at initial stages or receiving stages of shield |
| CN103541735B (en) * | 2013-11-13 | 2015-07-08 | 葛洲坝集团第一工程有限公司 | Tunneling machine stepping pushing supporting device and construction method |
| CN105484170A (en) * | 2015-12-16 | 2016-04-13 | 中铁二十五局集团第三工程有限公司 | Jacking construction method for prefabricated frame with inversely arranged oil top on variable ramp |
| CN105804762A (en) * | 2016-05-25 | 2016-07-27 | 中铁工程装备集团技术服务有限公司 | Station-tunneling through and turn-over device for shield tunneling machine |
| CN106223963A (en) * | 2016-08-05 | 2016-12-14 | 中国水利水电第十四工程局有限公司 | A kind of shield machine air pushing construction method by subsurface excavation method tunnel |
| CN107060800A (en) * | 2017-03-09 | 2017-08-18 | 广东水电二局股份有限公司 | A kind of shield-tunneling construction huge stone handling construction method |
| CN107201904A (en) * | 2017-07-29 | 2017-09-26 | 中铁局集团有限公司 | A kind of shield machine translation constructing structure and shift method |
| CN107676100A (en) * | 2017-09-05 | 2018-02-09 | 石家庄铁道大学 | Poor strata Forecasting Methodology based on shield driving parameter |
| CN112343608A (en) * | 2020-12-15 | 2021-02-09 | 中铁工程装备集团有限公司 | Inclined shaft TBM (tunnel boring machine) starting system and starting method thereof |
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| CN103541735B (en) * | 2013-11-13 | 2015-07-08 | 葛洲坝集团第一工程有限公司 | Tunneling machine stepping pushing supporting device and construction method |
| CN103790594A (en) * | 2014-02-26 | 2014-05-14 | 中铁一局集团有限公司 | Method for exploring and processing interior of boulder hole in front for shield method construction |
| CN104594911A (en) * | 2015-02-16 | 2015-05-06 | 中建交通建设集团有限公司 | Construction method of close-range down-traversing operation lines at initial stages or receiving stages of shield |
| CN105484170B (en) * | 2015-12-16 | 2017-07-11 | 中铁二十五局集团第三工程有限公司 | One kind becomes the ramp top that oils and inverts precast frame jacking construction method |
| CN105484170A (en) * | 2015-12-16 | 2016-04-13 | 中铁二十五局集团第三工程有限公司 | Jacking construction method for prefabricated frame with inversely arranged oil top on variable ramp |
| CN105804762A (en) * | 2016-05-25 | 2016-07-27 | 中铁工程装备集团技术服务有限公司 | Station-tunneling through and turn-over device for shield tunneling machine |
| CN106223963A (en) * | 2016-08-05 | 2016-12-14 | 中国水利水电第十四工程局有限公司 | A kind of shield machine air pushing construction method by subsurface excavation method tunnel |
| CN107060800A (en) * | 2017-03-09 | 2017-08-18 | 广东水电二局股份有限公司 | A kind of shield-tunneling construction huge stone handling construction method |
| CN107201904A (en) * | 2017-07-29 | 2017-09-26 | 中铁局集团有限公司 | A kind of shield machine translation constructing structure and shift method |
| CN107201904B (en) * | 2017-07-29 | 2023-02-24 | 中铁一局集团有限公司 | Translation construction structure and translation method for shield tunneling machine |
| CN107676100A (en) * | 2017-09-05 | 2018-02-09 | 石家庄铁道大学 | Poor strata Forecasting Methodology based on shield driving parameter |
| CN107676100B (en) * | 2017-09-05 | 2019-08-02 | 石家庄铁道大学 | Poor strata prediction technique based on shield driving parameter |
| CN112343608A (en) * | 2020-12-15 | 2021-02-09 | 中铁工程装备集团有限公司 | Inclined shaft TBM (tunnel boring machine) starting system and starting method thereof |
| CN113756827A (en) * | 2021-09-13 | 2021-12-07 | 广东水电二局股份有限公司 | Bearing wheel device and TBM air-assisted stepping method based on bearing wheel device |
| CN113756827B (en) * | 2021-09-13 | 2023-08-11 | 广东水电二局股份有限公司 | Bearing wheel device and TBM air-pushing stepping method based on bearing wheel device |
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