CN1740518A - Deviation correcting pressure weight method for side rolling in double circle shield tunnel construction - Google Patents
Deviation correcting pressure weight method for side rolling in double circle shield tunnel construction Download PDFInfo
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- CN1740518A CN1740518A CN 200510029898 CN200510029898A CN1740518A CN 1740518 A CN1740518 A CN 1740518A CN 200510029898 CN200510029898 CN 200510029898 CN 200510029898 A CN200510029898 A CN 200510029898A CN 1740518 A CN1740518 A CN 1740518A
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Abstract
The deviation correcting pressure weight method for side rolling in double circle shield tunnel construction used in tunnel construction engineering technology includes the following steps: 1. calculating the pressure weight lead block size in finite element method based on the construction of tunnel shield machine, soil condition and the deviation angle; 2. designing the shape of the lead blocks as cuboids with weight of 200 kg and 1.38x0.13x0.1 m3 size; 3. selecting the lead block setting positions; and 4. eliminating rest deviation angle in available technology in the case of relatively great deviation angle. The method of the present invention is simple and practical, can greatly reduce the negative effect on the peripheral environment, and is suitable for different kinds of double circle shield tunnel construction.
Description
Technical field
The present invention relates to a kind of job practices of construction of tunnel technical field, specifically is the ballast method for correcting error of side rolling in a kind of double-O-tube shield tunnel construction.
Background technology
Double-O-tube shield (DOT) method tunnel becomes one of job practices in subway construction and the municipal engineering tunnel construction owing to descending space resources frugally, reducing influence, reduction construction costs to the ground structure.But shield machine can produce side rolling deflection (hereinafter to be referred as sidewindering) phenomenon inevitably in construction, and promptly the section of shield machine is to a lateral deviation gyration α.Double-O-tube shield tunnel has two axis, lateral dimensions to enlarge markedly, lining segment generation rolling deflection phenomenon will directly influence pipe sheet assembling, influence normal function of use thereby make middle standing pillar produce subsidiary stress, also can influence the control of ground settlement and the use of Suporting structure simultaneously.Therefore, rolling deflection control also just becomes technology emphasis and the difficult point in the double-O-tube shield work progress.Usually, the driving of double-O-tube shield machine by about the big mutual counter-rotating of cutterhead, the moment of torsion counter-force is cancelled out each other, and sidewinders so be difficult for generation; But Just because of this,, more be difficult to correct in case sidewinder generation.Sidewinder phenomenon for what the double-O-tube shield machine produced in propelling, use the action of rectifying a deviation of shield structure jack and imitation-shaped knife in the prior art.In the correction of rolling, except that with two big cutterheads simultaneously round about rotation produce the moment of torsion of cancelling out each other and rectify a deviation the measure of action with imitation-shaped knife, also having equipped the correction jack that rolls especially and having made shield structure master jack produce eccentric force to act on the moment opposite and correct rolling deflection with rotating direction.But engineering practice proves, because 1) jack of rectifying a deviation sometimes is difficult to the deflection that produces corrected rapidly and comes; But also can produce the problem of correction transition; 2) backbreaking of imitation-shaped knife can make the stratum too much distortion of generation and influence surrounding environment.Therefore, the correcting device that need dispose on utilizing existing double-O-tube shield machine, proposition can protect environment can correct the practicable technology measure of deflection again.
Find through literature search prior art, Chinese patent application numbers 200410067139.4, denomination of invention: the method for double-O-tube shield corner control, publication number: 1614197, this patent readme is: " double-O-tube shield two waists respectively are provided with 6～8 and revise the corner jack, and it is along ± 1 ° of shield structure housing circumferencial direction rotation; in the shield driving process; in case rotation appears in the shield structure, will revise the jack reverse rotation, revises deflection; Open left shield structure bottom and right shield structure top jack, utilize independent top or bottom jack, make shield structure home position produce moment of torsion, the shield structure is turned right; Utilize imitation-shaped knife to the backbreaking of corresponding site, change shield structure yawing moment; Utilize the unearthed amount of left and right screw machine, control shield structure corner; Adopt antisymmetric grouting behind shaft or drift lining, revise the section of jurisdiction corner, further revise shield structure corner; When the shield structure deflects,, realize the rotation of shield structure to shield structure single-side pressurization weight.The present invention is applicable to the engineering that all adopt the construction of double-O-tube shield technology ..." though this patent also proposed to adopt the method for one-sided ballast to correct the double-O-tube shield corner, do not point out material, the collocation method of concrete ballast, also do not provide the relation how many drift angles how many loads can correct that adds.Thereby before the practice of construction operation, do not have predicting means, make operation be in blindly state.
Summary of the invention
The objective of the invention is to remedy defective and deficiency in the existing side rolling deviation correcting technology of double-O-tube shield machine, the ballast method for correcting error of side rolling in a kind of double-O-tube shield tunnel construction is provided, make it provide more detailed simple and effective correction scheme, required only is the transportation of lead and deposits, can alleviate the harmful effect that surrounding environment is produced greatly.
The present invention is achieved by the following technical solutions, and concrete steps are as follows:
(1) use the weight size that Finite Element calculates ballast at structure, soil nature condition and the deflection angle of shield machine, the weight of ballast adopts lead.
The calculating of Finite Element, step is as follows:
1) the finite element numerical analysis method of employing plane strain mode.
2) the modeling scope of finite element is horizontal direction 100m, and vertical direction 25m, double-O-tube shield tunnel place the centre of model, and the border, both sides is far from the actual buried depth in center, tunnel 45m surface distance consideration tunnel, and the bottom surface is 12.5m far from the center, tunnel.
3) fringe conditions is set as follows in the calculating: the inboard free boundary that adopts of shield structure housing, and the bound level displacement of model both sides, the model bottom retrains vertically and horizontal movement simultaneously.But just adopt the draining border around the model.
4) constitutive relation of soft soil layer adopts modified cambridge model, and the shield structure is taken as elastic body.
5) set double-O-tube shield in the model and be in deflection state, set initial deflection angle θ degree, in the last shield structure of lifting side, add the ballast load then, calculate the relation of loading and angle of revolution.Obtain being returned to the required ballast load of 0 degree, obtain the relation of deflection angle and ballast load from deflection θ degree.
In the construction of reality,, can calculate the size of corresponding ballast load rapidly by above-mentioned algorithm owing to show the deflection angle that produces on the operation instrument in real time.
(2) design of lead shape: consider the carrying convenience of lead, generally setting every heavily is 200 kilograms (2kN).Because the jack top journey of double-O-tube shield is 1380mm.Therefore, the shaped design of lead is 1.38 * 0.13 * 0.1m
3Cuboid.And, for the ease of transportation, on every lead, be provided with and give a hand.The lead ballast is 200kN to the maximum.
(3) selection of lead deposit position: because the space in the shield machine is less, the ballast lead is deposited in the space between the shield structure jack of lifting side.Also can hang by the pipe sheet assembling drop hanger.Lead is not arbitrarily to stack.Required in order to the wide-angle correction in order to deposit lead as much as possible in limited space, lead has notch overlap joint tenon each other, and lead can be deposited in together in interlock.
(4) when deflection angle bigger, when ballast correction is not enough to correct whole deflection angles, should adopt part ballast straightening method; Promptly correct the part deflection angle with ballast, part in addition in conjunction with the correction of the correction jack in the method for prior art double-O-tube shield corner control, imitation-shaped knife backbreak, methods such as antisymmetric grouting behind shaft or drift lining solve.
The inventive method is a side that the lead ballast is placed double-O-tube shield, under the effect of ballast gravity double-O-tube shield is produced an opposite moment with yawing moment.Make the double-O-tube shield machine in the twisting action backspin reply deflection of moment angle.The size of torque reaction is relevant with the stacking weight of heavy, and weight is big more, and torque reaction is big more, and it is effective more to rectify a deviation.
Method for correcting error of the present invention is simple and practical, unites use with existing method and can alleviate the harmful effect that surrounding environment is produced greatly, and required only is the transportation of lead and deposits.And the weight in the scheme working-out stage of constructing with regard to the pairing ballast of measurable deviation adjustment angle is to formulate the reasonable construction scheme service.The present invention is applicable to the engineering that all adopt the construction of double-O-tube shield technology.
Description of drawings
Fig. 1 is a lead allocation plan of the present invention
Ballast correction conditional curve figure when Fig. 2 spends deflection angle for the present invention 0.25,0.5
The specific embodiment
Provide following examples in conjunction with technical scheme of the present invention:
Lead be shaped as cuboid, the lead size is 1.38 * 0.13 * 0.1m
3, being provided with on the every lead and giving a hand, lead has notch overlap joint tenon each other, and be advisable in the gap of filling between the shield machine master jack, as shown in Figure 1.
Embodiment 1: the ballast correction of (0.25 degree) under the condition of little drift angle
Embodiment is an example with the double-O-tube shield tunnel construction of No. 6 line ten bid sections of Shanghai Underground.Use Finite Element according to the structure of double-O-tube shield machine and soil nature condition and calculate double-O-tube shield machine required load when given deflection angle is returned to zero degree, the correlation of corresponding deflection angle correction load (kN) is as follows:
0.1 the degree deflection angle needs the correction load of 92kN; 0.2 the degree deflection angle needs the correction load of 168kN; 0.3 the degree deflection angle needs the correction load of 230kN; 0.4 the degree deflection angle needs the correction load of 290kN; 0.5 the degree deflection angle needs the correction load of 345kN; 0.6 the degree deflection angle needs the correction load of 395kN; 0.7 the degree deflection angle needs the correction load of 435kN; 0.8 the degree deflection angle needs the correction load of 477kN; 0.9 the degree deflection angle needs the correction load of 518kN; 1 degree deflection angle needs the correction load of 560kN.0.25 degree sidewinders load and the angle relation that deflection angle is returned to level, shown in figure-2.
Hence one can see that, is deflected to 0.25 degree and then needs ballast 199kN, needs 199/2=100 piece lead so altogether, with stereotyped lead, places respectively between the jack, as shown in Figure 1, looks corner variation the increase and decrease gradually lead.The result only just can make the deflection of shield machine be returned to level by the pressurization lead.
Embodiment 2: the ballast correction of (0.5 degree) under the condition of big drift angle
In the construction of No. 6 line ten bid sections of Shanghai Underground,, as be 0.5 when spending when deflection angle is bigger.Formation condition according to Shanghai is 345kN by the ballast correction load that Finite Element calculates.At this moment need lead 345/2=173 piece.But in fact the clearance spaces of shield machine is limited, can only place the lead about 100.Can only adopt the method for part ballast correction, at this moment the ballast amount is 200kN, the ballast correction conditional curve during 0.5 ° of deflection angle that Fig. 2 calculates for the method for using finite element numerical analysis.Hence one can see that, and the ballast of 200kN can make double-O-tube shield revolution 0.25 degree.0.25 degree deflection angle in addition solves according to the method for the double-O-tube shield corner control of prior art.The ballast straightening method comparatively economical and effective that should begin to rectify a deviation is adopted in The above results explanation under the condition of less deflection angle (0.25 degree).
Claims (6)
1, the ballast method for correcting error of side rolling in a kind of double-O-tube shield tunnel construction is characterized in that concrete steps are as follows:
(1) use the weight size that Finite Element calculates ballast at structure, soil nature condition and the deflection angle of shield machine, the weight of ballast adopts lead;
(2) design of lead shape: set every lead and heavily be 200 kilograms, shaped design is 1.38 * 0.13 * 0.1m
3Cuboid;
(3) selection of lead deposit position: the ballast lead is deposited in the space between the shield structure jack that picks up side, and lead has notch overlap joint tenon each other, and lead can be deposited in together in interlock;
(4) when deflection angle bigger, when the ballast lead can only be corrected the part deflection angle, adopt part ballast straightening method, promptly correct the part deflection angle with ballast, part deflection angle in addition solves in conjunction with the method for double-O-tube shield corner control.
2, the ballast method for correcting error of side rolling in the double-O-tube shield tunnel construction according to claim 1 is characterized in that described Finite Element is calculated, and step is as follows:
1) the finite element numerical analysis method of employing plane strain mode;
2) the modeling scope of finite element is horizontal direction 100m, and vertical direction 25m, double-O-tube shield tunnel place the centre of model, and the border, both sides is far from center, tunnel 45m; Surface distance is considered the actual buried depth in tunnel, and the bottom surface is 12.5m far from the center, tunnel;
3) fringe conditions is set as follows in the calculating: the inboard free boundary that adopts of shield structure housing, and the bound level displacement of model both sides, the model bottom retrains vertically and horizontal movement simultaneously, but adopts the draining border around the model;
4) constitutive relation of soft soil layer adopts modified cambridge model, and the shield structure is taken as elastic body;
5) set double-O-tube shield in the model and be in deflection state, set initial deflection angle θ degree, in the last shield structure that picks up side, add the ballast load then, calculate the relation of loading and angle of revolution, obtain being returned to the required ballast load of 0 degree, obtain the relation of deflection angle and ballast load from deflection θ degree.
3, the ballast method for correcting error of side rolling in the double-O-tube shield tunnel construction according to claim 2, it is characterized in that, in the construction of reality,, calculate the size of corresponding ballast load rapidly by above-mentioned Finite Element according to showing the deflection angle that produces on the operation instrument in real time.
4, the ballast method for correcting error of side rolling in the double-O-tube shield tunnel construction according to claim 1 is characterized in that, for the ease of transportation, is provided with on every lead and gives a hand.
5, according to the ballast method for correcting error of side rolling in claim 1 or the 4 described double-O-tube shield tunnel constructions, it is characterized in that the total ballast of lead is 200kN to the maximum.
6, according to the ballast method for correcting error of side rolling in claim 1 or the construction of 4 described double-O-tube shield tunnels, it is characterized in that, in the step (3), lead or hang by the pipe sheet assembling drop hanger.
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| CNB2005100298986A CN100516462C (en) | 2005-09-22 | 2005-09-22 | Deviation correcting pressure weight method for side rolling in double circle shield tunnel construction |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244134A (en) * | 2013-04-26 | 2013-08-14 | 上海交通大学 | Anti-floating ballasting method for shield tunnel under negative earthing condition |
| CN103270246A (en) * | 2010-12-07 | 2013-08-28 | 韩国建设技术硏究院 | Drain system of shield tunnel lining and method for constructing shield tunnel using same |
| CN103670432A (en) * | 2013-12-19 | 2014-03-26 | 上海市基础工程集团有限公司 | Soft foundation double circle shield machine head chip cutting device |
| CN105203070A (en) * | 2015-09-21 | 2015-12-30 | 重庆大学 | Calculation method for soil deformation caused by double-circle shield tunnel construction deflection |
| CN105863657A (en) * | 2016-05-27 | 2016-08-17 | 中铁二十局集团轨道交通工程有限公司 | Start-side rolling collection device and start-side rolling collection method for earth pressure balance shield machine |
| CN112228094A (en) * | 2019-07-15 | 2021-01-15 | 代春茹 | Anti-side rolling type full-face tunnel boring machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US695724A (en) * | 1901-09-28 | 1902-03-18 | Reinhold Herman | Electric lock. |
| JP2711300B2 (en) * | 1989-07-26 | 1998-02-10 | 清水建設株式会社 | Deflection method of double-section shield machine |
| CN1063826C (en) * | 1994-03-07 | 2001-03-28 | 藤田株式会社 | Suporting structure |
| CN1321258C (en) * | 2003-03-04 | 2007-06-13 | 上海市隧道工程轨道交通设计研究院 | Two-circle shield method tunnel lining structure |
| CN1614197A (en) * | 2004-10-14 | 2005-05-11 | 上海隧道工程股份有限公司 | Direction turning cotnrol of double circular shielding |
-
2005
- 2005-09-22 CN CNB2005100298986A patent/CN100516462C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103270246A (en) * | 2010-12-07 | 2013-08-28 | 韩国建设技术硏究院 | Drain system of shield tunnel lining and method for constructing shield tunnel using same |
| CN103270246B (en) * | 2010-12-07 | 2015-06-24 | 韩国建设技术硏究院 | Drain system of shield tunnel lining and method for constructing shield tunnel using same |
| CN103244134A (en) * | 2013-04-26 | 2013-08-14 | 上海交通大学 | Anti-floating ballasting method for shield tunnel under negative earthing condition |
| CN103244134B (en) * | 2013-04-26 | 2015-04-29 | 上海交通大学 | Anti-floating ballasting method for shield tunnel under negative earthing condition |
| CN103670432A (en) * | 2013-12-19 | 2014-03-26 | 上海市基础工程集团有限公司 | Soft foundation double circle shield machine head chip cutting device |
| CN105203070A (en) * | 2015-09-21 | 2015-12-30 | 重庆大学 | Calculation method for soil deformation caused by double-circle shield tunnel construction deflection |
| CN105203070B (en) * | 2015-09-21 | 2017-11-14 | 重庆大学 | A kind of double-O-tube shield tunnel construction deflection causes the computational methods of soil deformation |
| CN105863657A (en) * | 2016-05-27 | 2016-08-17 | 中铁二十局集团轨道交通工程有限公司 | Start-side rolling collection device and start-side rolling collection method for earth pressure balance shield machine |
| CN105863657B (en) * | 2016-05-27 | 2018-02-23 | 中铁二十一局集团轨道交通工程有限公司 | Balancing earth-pressure shielding machine, which originates, sidewinders correcting device and method |
| CN112228094A (en) * | 2019-07-15 | 2021-01-15 | 代春茹 | Anti-side rolling type full-face tunnel boring machine |
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