CN101446201A - Method for rectifying and selecting tunnel segment - Google Patents
Method for rectifying and selecting tunnel segment Download PDFInfo
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- CN101446201A CN101446201A CNA2008102073694A CN200810207369A CN101446201A CN 101446201 A CN101446201 A CN 101446201A CN A2008102073694 A CNA2008102073694 A CN A2008102073694A CN 200810207369 A CN200810207369 A CN 200810207369A CN 101446201 A CN101446201 A CN 101446201A
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Abstract
The invention discloses a method for rectifying and selecting a tunnel segment. The method comprises a step of confirming a segment-assembling and combining proposal. The step comprises the content as follows: firstly, a plurality of positions used for sticking wedges with maximum thickness are set along the circle of the end surface of a segment assembling position at a shield tail; then all segment permutation and combination forms which are formed in a way that a current ring and a plurality of subsequent ring segments respectively stick the wedges with the maximum thickness at a plurality of positions are arranged; at the same time, the deviation between a tube ring center of the last ring in each segment permutation and combination form and a tunnel design axial line is measured; and finally a proposal with minimum deviation is confirmed as the segment-assembling and combining proposal. The invention has the advantages of high efficiency, good effect and wide application range; the method can select a construction proposal with best segment selection and combination assembly fast and automatically to achieve the effects of reducing the construction axial line deviation and ensuring the tunnel engineering quality; and the method is applicable to the selection and the construction of the segment-assembling and combining proposal in a shield tunnel with the assembly form of all types.
Description
Technical field:
The present invention relates to the construction of pipe sheet assembling in the shield tunnel, particularly relate to a kind of method for rectifying and selecting tunnel segment.
Background technology:
Shield tunnel is to be assembled into annulus and to be formed in shield machine by the section of jurisdiction of fixed block number (precast unit); shield machine be one by the knife cutting soil body; provide the work plane protection by cylindric box hat; relying on the section of jurisdiction that is assembled into ring in the box hat awards the jack group that is circle-shaped layout and provides support; promote forward by jack then, thereby be implemented in the large-scale machine that advances in the soil body.In the process of underground job, the movement locus of shield machine will basically form the actual axis of subterranean tunnel trend, the actual axis in engine request tunnel should be tried one's best approaching or be fitted like a glove design axis (DTA), with the quality of assurance construction of tunnel, thus the safety after guarantee road tunnel tunnel builds up.Therefore the real time position of shield machine must be accurately controlled in the shield tunnel construction in strict accordance with the design axis, and correct each endless tube sheet of assembly unit guarantees that follow-up section of jurisdiction can be assembled on the design axis, and the tunnel after the moulding just can adhere to specification like this.
Desire to reach build up the tunnel axis as far as possible near or fit like a glove the design axis (DTA) purpose, to guarantee that not only shield machine strictly advances according to the design axis, and to make adjustment to the current endless tube sheet and the follow-up endless tube sheet that are about to assembly unit, correctly carry out pipe ring type selecting and between permutation and combination, with the assembly unit position of guaranteeing into the endless tube sheet be strict controlled in the design axis on.Will finishing in the shield tunnel construction that Here it is of task.So-called method for rectifying and selecting tunnel segment is implemented by section of jurisdiction rectifying and selecting system, be minimised as target with the deviation between actual axis in tunnel and the design axis (DTA), based on real-time attitude of current shield machine and position, the method that the current endless tube sheet in tunnel and follow-up endless tube sheet assembling combination scheme are made one's options and construct.
According to the entire combination form between pipe ring and the pipe ring, the pipe sheet assembling mode can be divided into: through seam assembling and staggered joint erection.The situation of through seam assembling is seen shown in Figure 1, the assembly unit longitudinal joint of its each pipe ring aligns in line mutually, rectangle pipe ring (ring width equates on the loopful) and wedge shape pipe ring are adopted in the combination of each pipe ring usually, and (ring width does not wait on the loopful, it is narrow on one side to be a hem width) combine, can not rotate relatively between each pipe ring, this through seam assembling mode is common in subway work.The situation of staggered joint erection is seen shown in Figure 2, the assembly unit longitudinal joint of its each pipe ring staggers mutually, 1/2～1/3 arc length of pipe ring generally staggers, the combination of each pipe ring adopts rectangle pipe ring and wedge shape pipe ring to combine usually, can adopt rotates a certain angle pipe ring forms staggered joint erection, because the difference of the wedge shape pipe ring anglec of rotation can cause the actual desired shape or cross-section in tunnel, thereby created condition for the correction of constructing tunnel axis.General wedge shape pipe sheet assembling is as a kind of special circumstances of staggered joint erection, and its pipe ring all adopts the wedge shape pipe ring, and this wedge shape pipe ring can rotate in the scope of all 360 ° of ring, and this kind mode makes up the wedge shape pipe ring by rotating different angles.
In constructing tunnel, whenever shield machine push ahead once prepare the current ring of assembly unit before, section of jurisdiction rectifying and selecting system will be on the basis of measuring shield machine real time position and attitude data, calculate constructing tunnel axis that the different assembling combination of current ring and follow-up ring thereof will cause and the deviation between the design axis, the optimum combination scheme of therefrom selecting the deviation minimum is as constructure scheme and construct.For the staggered joint erection mode, be to realize by the anglec of rotation of change as the wedge shape pipe ring of current ring and follow-up ring thereof, see also Fig. 3, promptly find out the type selecting assembled scheme of the error D1 minimum between constructing tunnel axes O 1O2 and the design axis (DTA); For the through seam assembling mode, see also Fig. 4, normally chock 02 realizes by sticking on the pipe ring suitable angle position in 01 end face ring week.Chock 02 is called the power transmission liner again, be according to the size of section of jurisdiction and the spline of the special processing of form, general thickness has the different size of 1～6mm, in the construction it is sticked on the end face of back of the body jack of the current ring of wanting assembly unit, the chock 02 of thickness maximum is pasted at place during stickup at first selected pipe ring 01 circumference, be the chock 02 that successively decreases successively to the evenly distributed stickup thickness in both sides respectively in the center with it then, thereby form the wedge shape amount of pipe ring 01, extremely minimum with the deviation that reduces between current ring and the design axis.
External because to carry out the history of shield tunnel construction longer, the section of jurisdiction rectifying and selecting system that is used for shield machine of a collection of maturation has appearred at present, and wherein representative have a German VMT system.This system is before constructing tunnel, essential information to shield machine and section of jurisdiction is carried out the initialization setting, after obtaining the shield attitude data by shield structure automatic guiding system, carry out the measurement in shield tail gap, and read the stroke of the inner jack of shield machine by sensor, analyze then, handle, calculate and relatively make judgement, thereby determine the optimum anglec of rotation of current pipe ring, current ring is installed according to the result of constructure scheme by operating personnel at last with the design axis.This system not only can determine the optimum anglec of rotation of current pipe ring and the anglec of rotation of the follow-up any pipe ring of prediction, but also can generate the correction curve behind shield structure off-design axis automatically, to instruct the reasonable construction of shield structure, revert on the design axis.
This system can solve the section of jurisdiction type selecting combinatorial problem of staggered joint erection (containing general wedge shape pipe sheet assembling) mode, the correct optimum combination scheme of selecting current endless tube sheet and the assembly unit of follow-up endless tube sheet, make the section of jurisdiction can be better along the assembly unit of design axis, thereby in engineering, obtained good application.But this system and other similar system all can only be used for the construction of staggered joint erection and general wedge shape section of jurisdiction erection method, and can not be suitable for for the through seam assembling mode that accounts for significant proportion in the shield tunnel construction, this is because can't adopt the method for rotation pipe ring angle to realize the optimum combination scheme of pipe sheet assembling in the through seam assembling.
Constructing tunnel for the through seam assembling mode, normally realize constructing tunnel axis and the error minimize of design between the axis, can realize that the optimum type selecting assembled scheme of this target will determine to stick on the chock of which kind of gauge thickness on which suitable angle position in pipe ring ring week by stick on chock at the pipe ring end face.The rectifying and selecting tunnel segment system great majority that are used at present the through seam assembling mode both at home and abroad are to adopt artificial method to realize, promptly on the basis of measuring shield machine real time position and attitude, rely on constructor's experience, determine to stick on the thickness and the position angle on pipe ring ring week thereof of chock, estimate after current endless tube sheet and the assembly unit of follow-up endless tube sheet deviation with the constructing tunnel axis.Not only efficient is low for obvious this method, and effect is also bad, because Shi Gong result not only depends on operator's factors such as practical experience, physiological status and mental status like this, manually calculate but also will spend the plenty of time, this pipe sheet assembling scheme that will inevitably make last enforcement is not the optimum combination scheme, thereby increase the deviation between actual axis in tunnel and the design axis, reduce workmanship and efficiency of construction.
Summary of the invention:
Technical problem to be solved by this invention is to overcome the through seam assembling mode that can't the be used for constructing tunnel of prior art, and can only adopt manual type to select and realize the deficiency of pipe sheet assembling combination construction scheme, a kind of high efficiency method for rectifying and selecting tunnel segment is provided, it is not only applicable to the staggered joint erection mode but also is applicable to the shield tunnel construction of through seam assembling mode, this method can be determined to stick on the thickness of chock and the optimum section of jurisdiction type selecting combination construction scheme of position in the construction fast, thereby guarantee the tunnel construction quality, reduce the misalignment of axe of constructing.
The present invention has taked following technical scheme to solve its technical problem:
A kind of method for rectifying and selecting tunnel segment, be used for the selected and construction of shield tunnel pipe sheet assembling assembled scheme, comprise collection and setting primary data, measure shield tail gap and shield attitude, shield machine automatic deviation correction, determine pipe sheet assembling assembled scheme and pipe sheet assembling construction; The content of described definite pipe sheet assembling assembled scheme part is: at first set on the end face of shield tail segment assembly position in order to paste some positions of the maximum chock of thickness along circumference, arrange out current ring and several follow-up endless tube sheets thereof then and on these some positions, paste formed all the section of jurisdiction permutation and combination methods of the maximum chock of thickness respectively, calculate the pipe ring center of last ring in each section of jurisdiction permutation and combination method and the deviation of Tunnel Design axis simultaneously, determine that at last wherein the scheme of deviation minimum is the pipe sheet assembling assembled scheme.
Method for rectifying and selecting tunnel segment of the present invention comprises the steps:
(1) the basic initial parameter of collection shield machine, section of jurisdiction, chock and Tunnel Design axis, and the maximum permissible deviation value between default tunnel pipe ring and the Tunnel Design axis
Gather following basic initial parameter and import self-con-tained unit in the shield machine:
In the length overall of shield machine, shield tail interior diameter, shield structure the angle of the number of jack, distribution and when not extending to the distance of shield structure otch; The size of section of jurisdiction; The gauge thickness of chock; On the Tunnel Design axis every the space coordinates and the mileage of the point of 1m or 2m;
And the maximum permissible deviation value between default tunnel pipe ring and the Tunnel Design axis;
(2) measure the gap that becomes between pipe ring outer peripheral face and the shield machine shield tail inner housing
Measure the gap that becomes between pipe ring outer peripheral face and the shield machine shield tail inner housing, draw the elevation deviation value and the plane deviation value of pipe ring center and shield structure center line;
(3) measure the data that obtain jack stroke in current shield attitude and the shield machine
Obtain the data of current shield attitude by apparatus measures, read the data of jack stroke in the shield machine by sensor measurement;
(4) calculate the deviation that becomes pipe ring and Tunnel Design axis
In the self-con-tained unit of shield machine, calculate the center that becomes pipe ring and the deviation of Tunnel Design axis according to above-mentioned steps (1)～(3) gained data;
(5) judge whether this deviation exceeds default maximum permissible deviation value of (1) step, if then carried out for (6) step; If not, then carried out for (7) step
Whether exceed default maximum permissible deviation value of (1) step by self-con-tained unit determining step (4) the gained deviation in the shield machine, if then carried out for (6) step; If not, then carried out for (7) step;
(6) ahead running of shield machine is rectified a deviation, the matched curve that generates changeover portion is to substitute the Tunnel Design axis on this changeover portion
The system for automatically correcting of using in the shield machine self-con-tained unit is rectified a deviation to the ahead running of shield machine, set the changeover portion that shield machine revert to the Tunnel Design axis apart from length, generate a matched curve on this changeover portion, to substitute the Tunnel Design axis, revert on the design axis with the guiding shield machine, carry out step (7) then;
(7) on the end face of shield tail segment assembly position, set in order to paste some positions of the maximum chock of thickness along circumference;
(8) arrange out current ring and several follow-up endless tube sheets thereof and on these some positions, paste formed all the section of jurisdiction permutation and combination methods of the maximum chock of thickness respectively, calculate the pipe ring center of last ring in each section of jurisdiction permutation and combination method and the deviation of Tunnel Design axis or changeover portion matched curve simultaneously
Arrange out current ring by the self-con-tained unit in the shield machine and on the some positions that set, paste the maximum chock of thickness respectively, and the follow-up ring that splices is successively with it pasted the maximum chock of thickness respectively on the some positions that set, all section of jurisdiction permutation and combination methods of Xing Chenging calculate the pipe ring center of last ring in each section of jurisdiction permutation and combination method and the deviation of Tunnel Design axis or changeover portion matched curve simultaneously thus;
(9) the whole deviation of (8) step gained relatively is defined as the pipe sheet assembling assembled scheme with the scheme of deviation minimum wherein
Relatively the whole deviation of gained is calculated in (8) pacing in the self-con-tained unit of shield machine, and the scheme of deviation minimum wherein is defined as the pipe sheet assembling assembled scheme;
(10) confirm the also construction of certificate of pipe sheet assembling assembled scheme that (9) step was determined
The constructor confirms that according to experience (9) goes on foot the reasonability and the feasibility of the pipe sheet assembling assembled scheme of determining, and according to the pipe sheet assembling assembled scheme of confirming current ring is carried out installation.
In the method for rectifying and selecting tunnel segment of the present invention, the described some positions of step (7) are set on the end face of shield tail segment assembly position equably along circumference, and its quantity is identical with jack quantity in the shield machine; The quantity of the described follow-up ring of step (8) is 2～5.
Compared with prior art, the mode that the present invention's employing is sticked on chock at the pipe ring end face realizes section of jurisdiction type selecting combination construction scheme, thereby it not only can be used for the shield tunnel construction of through seam assembling mode, and when the rectangle pipe ring after sticking on chock is equal to the wedge shape pipe ring, can be applicable to the shield tunnel construction of staggered joint erection mode equally, so described method for rectifying and selecting tunnel segment has overcome the defective of external existing section of jurisdiction rectifying and selecting system narrow application range, can be applicable to the pipe sheet assembling construction of the shield tunnel of all types erection method.In addition, the present invention has abandoned the traditional approach by the artificial experience estimation, can select the thickness of sticking on chock in the construction and the optimum section of jurisdiction type selecting combination construction scheme of position fast automaticly, reach the effect of error minimize between constructing tunnel axis and the design axis, thereby described method for rectifying and selecting tunnel segment also has the high advantage of efficient, can reach the misalignment of axe that reduces to construct, guarantee the beneficial effect of tunnel construction quality.
Description of drawings:
Fig. 1 is the schematic diagram of tunnel duct piece through seam assembling mode.
Fig. 2 is the schematic diagram of tunnel duct piece staggered joint erection mode.
Fig. 3 is a pipe ring rotation correction schematic diagram.
Fig. 4 is that pipe ring is sticked on chock correction schematic diagram.
Fig. 5 construction sequence step of the present invention schematic diagram.
The specific embodiment:
Below in conjunction with specific embodiments and the drawings the present invention is described in further detail.
Present embodiment has adopted technical scheme of the present invention to construct, and it has provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
With certain shield tunnel construction engineering is example, and this project adopts diameter
15.43m shield-tunneling construction, shield structure main frame length overall is 13.976m, the tunnel adopts the through seam assembling mode, and use method for rectifying and selecting tunnel segment of the present invention and construct, this method comprises collection and setting primary data, measures shield tail gap and shield attitude, shield machine automatic deviation correction, determines pipe sheet assembling assembled scheme and pipe sheet assembling construction; At first on current ring end face, set some positions when determining the pipe sheet assembling assembled scheme along circumference, when the chock that calculates the thickness maximum then sticks on these some positions respectively after current ring and the follow-up ring assembly unit thereof with the different deviation values of Tunnel Design axis, determine that at last the scheme of this deviation value minimum is the pipe sheet assembling assembled scheme.The step of its construction is seen shown in Figure 5, and particular content is as follows:
(1) the basic initial parameter of collection shield machine, section of jurisdiction, chock and Tunnel Design axis, and the maximum permissible deviation value between default tunnel pipe ring and the Tunnel Design axis
This step is to carry out the system data initialization procedure.By gathering following basic initial parameter in engineering design, device parameter or the data with existing storehouse and importing self-con-tained unit in the shield machine:
The length overall 13.976m of shield machine, jack is 19 in the shield tail interior diameter 15.13m, shield machine, and the angle of distribution is 360 °/19, and the distance to shield structure otch when it does not extend is 9.3m;
The section of jurisdiction is of a size of: ring width 2m, section of jurisdiction external diameter 13.7m, thickness 0.65m;
The gauge thickness of chock is 4cm;
As on the listed Tunnel Design axis of following table 1 every the 3 d space coordinate of the point of 1m or 2m (X, Y, Z) and the data group of mileage LI.
Table 1
| Mileage LI | X | Y | Z |
| 482 | 8721.461 | 20259.2 | -11.1128 |
| 484 | 8723.281 | 20260.03 | -11.1707 |
| 486 | 8725.1 | 20260.86 | -11.2286 |
| 488 | 8726.92 | 20261.69 | -11.2865 |
| 490 | 8728.74 | 20262.52 | -11.3444 |
| 492 | 8730.561 | 20263.35 | -11.4023 |
| 494 | 8732.382 | 20264.17 | -11.4602 |
| 496 | 8734.204 | 20265 | -11.5181 |
| 498 | 8736.026 | 20265.82 | -11.576 |
| 500 | 8737.848 | 20266.65 | -11.6339 |
| 502 | 8739.671 | 20267.47 | -11.6918 |
| 504 | 8741.494 | 20268.29 | -11.7497 |
| … | … | … | … |
| … | … | … | … |
And import default maximum permissible deviation value 10cm between tunnel pipe ring and the Tunnel Design axis simultaneously.
(2) measure the gap that becomes between pipe ring outer peripheral face and the shield machine shield tail inner housing
In order to guarantee that in shield structure progradation the gap between section of jurisdiction and the shield machine protection housing is uniform; the phenomenon that gets stuck and cause shield machine to be unable to stir any more can not appear; reasonably to determine the assembling scheme of pipe ring; this just requires us must grasp into section of jurisdiction behind the ring and the gap between the shield machine protection housing; be shield tail gap, just will obtain the data of pipe ring relative position in shield machine.
After shield machine one ring advances end, in time measure the gap that has become between pipe ring outer peripheral face and the shield machine shield tail inner housing, the circularity of section of jurisdiction, the circularity of shield tail and the data of distortion situation thereof, thereby draw the elevation deviation value △ Z and the plane deviation value △ Y of pipe ring center and shield structure center line.
This process is carried out before the pipe ring assembly unit by survey crew, uses the shield tail gap of some positions on the conventional gage measuring annulus usually, and finally obtains the relative deviation at pipe ring center and shield machine afterbody center according to these data.
Present embodiment has been become the elevation deviation value △ Z=+16.9mm of pipe ring center and shield structure center line, plane deviation value △ Y=-1.3mm by this step.
(3) measure the data that obtain jack stroke in current shield attitude and the shield machine
Measure the data (seeing the following form 2) that obtain current shield attitude by the attitude of shield machine detection system of forming by instruments such as total powerstation, laser position detector, inclinometers, read the data of jack stroke in each shield machine again by the sensor measurement on the jack in the machine of being arranged at, thereby obtain the deviation of relative position between shield machine and the Tunnel Design axis, i.e. the situation of shield machine off-design axis.
Above-mentioned measuring process uses the general measure technology to finish by survey crew and shield structure control personnel.
(4) calculate the deviation that becomes pipe ring and Tunnel Design axis
In the self-con-tained unit of shield machine, calculate the center that becomes pipe ring and the deviation of Tunnel Design axis according to above-mentioned steps (1)～(3) gained data: plane deviation value △ P and elevation deviation value △ G, and the gained data are made following table 2 (being the present embodiment data in the table):
Table 2
| Section of jurisdiction ring number | LI | XG | YG | ZG | △P | △G | FW | GPD |
| 15 | 510.636 | 8737.089 | 20292.297 | -11.861 | -0.001 | 0.086 | 26.7146 | 0.0025 |
| 16 | 512.636 | 8738.903 | 20293.174 | -11.917 | 0.001 | 0.082 | 26.7228 | 0.0086 |
| 17 | 514.636 | 8740.725 | 20294.047 | -11.992 | -0.007 | 0.064 | 26.7293 | 0.0119 |
| 18 | 516.636 | 8742.500 | 20294.905 | -12.058 | -0.011 | 0.057 | 26.7336 | 0.0206 |
| 19 | 518.636 | 8744.294 | 20295.760 | -12.125 | -0.015 | 0.051 | 26.7392 | 0.0250 |
| 20 | 520.636 | 8746.168 | 20296.644 | -12.187 | -0.022 | 0.042 | 26.7462 | 0.0263 |
| 21 | 522.636 | 8747.965 | 20297.506 | -12.243 | -0.019 | 0.039 | 26.7549 | 0.0279 |
| 22 | 524.636 | 8749.756 | 20298.368 | -12.302 | -0.013 | 0.037 | 26.7571 | 0.0367 |
| 23 | 526.636 | 8751.534 | 20299.235 | -12.360 | 0.000 | 0.042 | 26.7633 | 0.0378 |
| 24 | 528.636 | 8753.255 | 20300.057 | -12.420 | -0.001 | 0.036 | 26.7688 | 0.0384 |
In the table, LI: section of jurisdiction mileage;
XG, YG, ZG: the actual coordinate at center, section of jurisdiction;
△ P: center, section of jurisdiction and the plane deviation value that designs axis;
△ G: center, section of jurisdiction and the elevation deviation value that designs axis;
FW: the azimuth from left to right of very heavy end face direction is met in the section of jurisdiction;
GPD: the very heavy end face direction angle of gradient is from top to bottom met in the section of jurisdiction.
(5) judge whether this deviation exceeds default maximum permissible deviation value of (1) step, if then carried out for (6) step; If not, then carried out for (7) step
Whether the value by self-con-tained unit determining step (4) gained plane deviation value △ P in the shield machine and elevation deviation value △ G exceeds default maximum permissible deviation value of (1) step, if deviation value transfinites, then carries out following (6) step correction work; If do not transfinite, then directly carry out (7) step content.
Can be as seen from Table 2, all have become the center of pipe ring and the deviation of Tunnel Design axis in the present embodiment, square root sum square that is plane deviation value △ P and elevation deviation value △ G does not all exceed default maximum permissible deviation value 10cm, so this embodiment directly carries out the content in (7) step.
(6) ahead running of shield machine is rectified a deviation, the matched curve that generates changeover portion is to substitute the Tunnel Design axis on this changeover portion
Using the system for automatically correcting of self-con-tained unit in the shield machine rectifies a deviation to the ahead running of shield machine: when shield attitude and section of jurisdiction misalignment design axis are very big, then between center, section of jurisdiction current location and predetermined regression point, manually set changeover portion with certain distance length, revert on the Tunnel Design axis in order to the guiding shield machine, Tunnel Design axis before matched curve of method generation of adopting relevant smooth curve fit on this changeover portion is with interim alternative regression point on the changeover portion, 3 d space coordinate (the X every the point of 1m or 2m is used in this matched curve equally, Y Z) represents with the data group of mileage LI.The driving of shield machine just carries out along this matched curve on changeover portion, thereby shield machine is revert on the design axis gradually.
What shield structure correction process adopted is existing routine techniques, does not repeat them here, and after the deviation of shield machine is repaired, just can carry out following step (7).
(7) on the end face of shield tail segment assembly position, set in order to paste some positions of the maximum chock of thickness along circumference
Described method for rectifying and selecting tunnel segment adopts the mode of sticking on chock at the pipe ring end face to realize section of jurisdiction type selecting combination construction scheme, and chock sticks on the end face of shield tail segment assembly position (contain the current ring of wanting assembly unit and with it on the end face of the follow-up ring of assembly unit) wedge shape amount with the formation pipe ring.Described method for rectifying and selecting tunnel segment is to be determined be shield tail segment assembly circumferential end surfaces where on paste the chock of thickness maximum, the angle of circumference of piece on shield tail segment assembly end face of promptly determining to bind.In the constructing tunnel of through seam assembling, the determined angle of circumference of piece on shield tail segment assembly end face that bind of this method can directly instruct the rectangle pipe ring to stick on the operation of chock as constructure scheme; And in the constructing tunnel of staggered joint erection, the rectangle pipe ring of sticking on chock is equivalent to have the wedge shape pipe ring of certain wedge shape amount, the determined angle of circumference of piece on shield tail segment assembly end face that bind of this method can be converted to the anglec of rotation of wedge shape pipe ring, forms the operation that constructure scheme instructs assembly unit wedge shape pipe ring with this.Therefore, method for rectifying and selecting tunnel segment of the present invention can not only be applied to the constructing tunnel of through seam assembling, and can be applied to the staggered joint erection constructing tunnel of (containing general wedge shape pipe sheet assembling).
The thickest chock is in the current ring of wanting assembly unit and the position difference of being pasted on the end face of the follow-up ring of assembly unit with it, the angle of circumference difference of piece at shield tail segment assembly end face promptly binds, after current ring and follow-up ring assembly unit thereof got on, its with Tunnel Design axis or changeover portion matched curve between the deviation that caused be different, one of main contents of described method for rectifying and selecting tunnel segment are exactly to want accurately estimate the effect of different schemes comprehensively.
At first on the end face of shield tail segment assembly position, at the end face of the current ring that is about to assembly unit with successively with it on the end face of each follow-up ring of assembly unit, jack number in the shield machine what, set in order to paste some positions of the maximum chock of thickness according to along the different angles of circumference.In the present embodiment, the quantity of jack is 19 in the shield machine, thereby sets the identical with it equally distributed some positions of quantity, i.e. 19 paste positions along circumference on the end face of shield tail segment assembly position.
(8) arrange out current ring and several follow-up endless tube sheets thereof and on these some positions, paste formed all the section of jurisdiction permutation and combination methods of the maximum chock of thickness respectively, calculate the pipe ring center of last ring in each section of jurisdiction permutation and combination method and the deviation of Tunnel Design axis or changeover portion matched curve simultaneously
On some positions, paste the thickness maximum wedge period of the day from 11 p.m. to 1 a.m respectively at current endless tube sheet, will form the different sections of jurisdiction permutation and combination method that equates with this position number, for example in the present embodiment, just form 19 different section of jurisdiction permutation and combination schemes owing to paste the difference of the position of the maximum chock of thickness on the current ring, and the deviation of pipe ring center that these schemes caused and Tunnel Design axis, perhaps the deviation (reverting on the changeover portion of Tunnel Design axis in order to the guiding shield machine) with the changeover portion matched curve is different.Obviously that scheme of deviation minimum is optimum pipe sheet assembling scheme.
Yet discover, the distance of only guaranteeing current ring and Tunnel Design axis is pressed close to most, the deviation minimum is unreasonable, because, current ring permutation and combination optimization can not guarantee that follow-up pipe ring permutation and combination also can optimization, promptly differs to guarantee that surely follow-up the 2nd ring, the 3rd ring with current ring assembly unit also can more and more press close to the Tunnel Design axis.Therefore, the quantity of described follow-up ring generally can be got 2～5, as long as promptly we guarantee to comprise that at least 3 of current ring encircles, is no more than the accuracy of the permutation and combination schemes of 6 rings, just can obtain control constructing tunnel axis and the preferable effect that designs misalignment of axe.
Therefore the present invention arranges out current ring by the self-con-tained unit in the shield machine paste the maximum chock of thickness respectively on the some position that set, and the follow-up ring that splices is successively with it pasted the maximum chock of thickness respectively on the some positions that set, all section of jurisdiction permutation and combination methods of Xing Chenging calculate the pipe ring center of last ring in each section of jurisdiction permutation and combination method and the deviation of Tunnel Design axis or changeover portion matched curve simultaneously thus.
In the present embodiment, this follow-up number of rings is measured 2, promptly will calculate the effect that 1 current ring splices all possible pipe sheet assembling assembled scheme of 2 follow-up rings more successively.As mentioned above, 19 different section of jurisdiction permutation and combination schemes on the different paste positions of current ring, have been formed in the present embodiment, and each scheme has been after having spliced the 1st follow-up ring, and the position of last 19 the maximum chocks of different stickup thickness of the 1st follow-up ring again can 19 different section of jurisdiction permutation and combination schemes of each self-forming; By that analogy, after having spliced the 2nd follow-up ring, the position of last 19 the maximum chocks of different stickup thickness of the 2nd follow-up ring again can 19 different section of jurisdiction permutation and combination schemes of each self-forming.Therefore, present embodiment can produce 19 altogether
3Individual different section of jurisdiction permutation and combination scheme.
Self-con-tained unit in the shield machine with above-mentioned all 19
3Individual different section of jurisdiction permutation and combination scheme all arranges, a section of jurisdiction of every discharge simultaneously permutation and combination scheme, just calculate last ring in this scheme, the i.e. deviation of the pipe ring center of the 2nd follow-up ring and Tunnel Design axis (present embodiment need not through the automatic deviation correction step, thereby does not have the changeover portion matched curve).With this iteration, when calculating the maximum chock of thickness respectively and sticking on diverse location 19
3The deviation at last ring centers of all of individual different section of jurisdiction permutation and combination scheme, last all data of present embodiment form following tables of data 3:
Table 3
| The piece sequence number that binds i | R | △r | ∠a | Ji | qx1 (i) | qx2 (i) | qx3 (i) | qx4 (i) | x(i) | y(i) | z(i) | D(i) |
| 1 | 15 | 0.04 | 0.145728 | 18.94737 | 0.0011 | 0.0389 | 0.0265 | 0.0135 | 1999.9982 | 0.8659 | 2.5222 | 0.0121 |
| 2 | 15 | 0.04 | 0.145728 | 37.89474 | 0.0042 | 0.0358 | 0.0323 | 0.0077 | 1999.9982 | 1.6379 | 2.1044 | 0.0123 |
| 3 | 15 | 0.04 | 0.145728 | 5684211 | 0.0091 | 0.0309 | 0.0367 | 0.0033 | 1999.9982 | 2.2324 | 1.4585 | 0.0111 |
| 4 | 15 | 0.04 | 0.145728 | 75.78947 | 0.0151 | 0.0249 | 0.0394 | 0.0006 | 1999.9982 | 2.5851 | 0.6546 | 0.0142 |
| 5 | 15 | 0.04 | 0.145728 | 94.73684 | 0.0217 | 0.0183 | 0.0399 | 0.0001 | 1999.9982 | 2.6576 | -0.2202 | 0.0152 |
| 6 | 15 | 0.04 | 0.145728 | 113.6842 | 0.0280 | 0.0120 | 0.0383 | 0.0017 | 1999.9982 | 2.4421 | -1.0712 | 0.0143 |
| 7 | 15 | 0.04 | 0.145728 | 132.6316 | 0.0335 | 0.0065 | 0.0347 | 0.0053 | 1999.9982 | 1.9619 | -1.8061 | 0.0147 |
| 8 | 15 | 0.04 | 0.145728 | 151.5789 | 0.0376 | 0.0024 | 0.0295 | 0.0105 | 1999.9982 | 1.2692 | -2.3453 | 0.0125 |
| 9 | 15 | 0.04 | 0.145728 | 170.5263 | 0.0397 | 0.0003 | 0.0233 | 0.0167 | 1999.9982 | 0.4389 | -2.6303 | 0.0132 |
| 10 | 15 | 0.04 | 0.145728 | 189.4737 | 0.0397 | 0.0003 | 0.0167 | 0.0233 | 1999.9982 | -0.4389 | -2.6303 | 0.0143 |
| 11 | 15 | 0.04 | 0.145728 | 208.4211 | 0.0376 | 0.0024 | 0.0105 | 0.0295 | 1999.9982 | -1.2692 | -2.3453 | 0.0145 |
| 12 | 15 | 0.04 | 0.145728 | 227.3684 | 0.0335 | 0.0065 | 0.0053 | 0.0347 | 1999.9982 | -1.9619 | -1.8061 | 0.0167 |
| 13 | 15 | 0.04 | 0.145728 | 246.3158 | 0.0280 | 0.0120 | 0.0017 | 0.0383 | 1999.9982 | -2.4421 | -1.0712 | 0.0161 |
| 14 | 15 | 0.04 | 0.145728 | 265.2632 | 0.0217 | 0.0183 | 0.0001 | 0.0399 | 1999.9982 | -2.6576 | -0.2202 | 0.0163 |
| 15 | 15 | 0.04 | 0.145728 | 284.2105 | 0.0151 | 0.0249 | 0.0006 | 0.0394 | 1999.9982 | -2.5851 | 0.6546 | 0.0159 |
| 16 | 15 | 0.04 | 0.145728 | 303.1579 | 0.0091 | 0.0309 | 0.0033 | 0.0367 | 1999.9982 | -2.2324 | 1.4585 | 0.0148 |
| 17 | 15 | 0.04 | 0.145728 | 322.1053 | 0.0042 | 0.0358 | 0.0077 | 0.0323 | 1999.9982 | -1.6379 | 2.1044 | 0.0146 |
| 18 | 15 | 0.04 | 0.145728 | 341.0526 | 0.0011 | 0.0389 | 0.0135 | 0.0265 | 1999.9982 | -0.8659 | 2.5222 | 0.0117 |
| 19 | 15 | 0.04 | 0.145728 | 360 | 0.0000 | 0.0400 | 0.0200 | 0.0200 | 1999.9982 | 0.0000 | 2.6667 | 0.0114 |
In the table,
The bind thickness △ r of piece,
Section of jurisdiction external diameter R,
Wedge angle ∠ a=(arctan (△ r/2R))/2,
The piece sequence number that binds i,
The bind position angle Ji at piece place of stickup,
Last wedge type amount qx1 (i)=R-[R * COS (0 °-Ji+360 °)] } * tg ∠ a,
Following wedge type amount qx2 (i)=R-[R * COS (180 °-Ji+360 °)] } * tg ∠ a,
Left side wedge type amount qx3 (i)=R-[R * COS (270 °-Ji+360 °)] } * tg ∠ a,
Right wedge type amount qx4 (i)=R-[R * COS (90 °-Ji+360 °)] } * tg ∠ a,
Last endless tube ring centre coordinate x (i), y (i), z (i),
Deviation value D (i) between last ring center and Tunnel Design axis or the changeover portion matched curve.
(9) the whole deviation of (8) step gained relatively is defined as the pipe sheet assembling assembled scheme with the scheme of deviation minimum wherein
The whole deviation of (8) step gained relatively in the self-con-tained unit of shield machine is defined as the pipe sheet assembling assembled scheme with the scheme of deviation minimum wherein;
By (8) pacing calculate obtain whole deviations after, in the self-con-tained unit of shield machine, all deviations are compared, that scheme of deviation minimum wherein is defined as the pipe sheet assembling assembled scheme.Can be drawn by last table 3, the deviation minimum is that the piece sequence number that binds is 3 scheme in the present embodiment, and its deviation is 0.0111m, so present embodiment is defined as this scheme the pipe sheet assembling assembled scheme preparing to implement.
(10) confirm the also construction of certificate of pipe sheet assembling assembled scheme that (9) step was determined
The constructor confirms the reasonability and the feasibility of the pipe sheet assembling assembled scheme that (9) step was determined according to experience, and current ring is carried out the concrete operations of installation according to the pipe sheet assembling assembled scheme of confirming.
In sum, method for rectifying and selecting tunnel segment of the present invention can be selected the thickness of sticking on chock in the construction and the optimum segment selection combination construction scheme of position fast automaticly, reach the effect of error minimize between constructing tunnel axis and the design axis, and overcome the defective of external existing section of jurisdiction rectifying and selecting system narrow application range, can be applicable to the pipe sheet assembling construction of the shield tunnel of all types erection method, thereby the present invention has efficient height, advantage effective and applied widely, can reach the misalignment of axe that reduces to construct, guarantee the beneficial effect of tunnel construction quality.
Claims (5)
1, a kind of method for rectifying and selecting tunnel segment, be used for the selected and construction of shield tunnel pipe sheet assembling assembled scheme, comprise and gather and set primary data, measure shield tail gap and shield attitude, the shield machine automatic deviation correction, determine the construction of pipe sheet assembling assembled scheme and pipe sheet assembling, it is characterized in that: the content of described definite pipe sheet assembling assembled scheme part is: at first set on the end face of shield tail segment assembly position in order to paste some positions of the maximum chock of thickness along circumference, arrange out current ring and several follow-up endless tube sheets thereof then and on these some positions, paste formed all the section of jurisdiction permutation and combination methods of the maximum chock of thickness respectively, calculate the pipe ring center of last ring in each section of jurisdiction permutation and combination method and the deviation of Tunnel Design axis simultaneously, determine that at last wherein the scheme of deviation minimum is the pipe sheet assembling assembled scheme.
2, method for rectifying and selecting tunnel segment according to claim 1 is characterized in that: this method comprises the steps:
(1) the basic initial parameter of collection shield machine, section of jurisdiction, chock and Tunnel Design axis, and the maximum permissible deviation value between default tunnel pipe ring and the Tunnel Design axis;
(2) measure the gap that becomes between pipe ring outer peripheral face and the shield machine shield tail inner housing;
(3) measure the data that obtain jack stroke in current shield attitude and the shield machine;
(4) calculate the deviation that becomes pipe ring and Tunnel Design axis;
(5) judge whether this deviation exceeds default maximum permissible deviation value of (1) step, if then carried out for (6) step; If not, then carried out for (7) step;
(6) ahead running of shield machine is rectified a deviation, the matched curve that generates changeover portion is to substitute the Tunnel Design axis on this changeover portion;
(7) on the end face of shield tail segment assembly position, set in order to paste some positions of the maximum chock of thickness along circumference;
(8) arrange out current ring and several follow-up endless tube sheets thereof and on these some positions, paste formed all the section of jurisdiction permutation and combination methods of the maximum chock of thickness respectively, calculate the pipe ring center of last ring in each section of jurisdiction permutation and combination method and the deviation of Tunnel Design axis or changeover portion matched curve simultaneously;
(9) the whole deviation of (8) step gained relatively is defined as the pipe sheet assembling assembled scheme with the scheme of deviation minimum wherein;
(10) confirm the also construction of certificate of pipe sheet assembling assembled scheme that (9) step was determined.
3, method for rectifying and selecting tunnel segment according to claim 2 is characterized in that: the particular content of described each step is:
Step (1)-
Gather following basic initial parameter and import self-con-tained unit in the shield machine:
In the length overall of shield machine, shield tail interior diameter, shield structure the angle of the number of jack, distribution and when not extending to the distance of shield structure otch; The size of section of jurisdiction; The gauge thickness of chock; On the Tunnel Design axis every the space coordinates and the mileage of the point of 1m or 2m;
And the maximum permissible deviation value between default tunnel pipe ring and the Tunnel Design axis;
Step (2)-
Measure the gap that becomes between pipe ring outer peripheral face and the shield machine shield tail inner housing, draw the elevation deviation value and the plane deviation value of pipe ring center and shield structure center line;
Step (3)-
Obtain the data of current shield attitude by apparatus measures, read the data of jack stroke in the shield machine by sensor measurement;
Step (4)-
In the self-con-tained unit of shield machine, calculate the center that becomes pipe ring and the deviation of Tunnel Design axis according to above-mentioned steps (1)～(3) gained data;
Step (5)-
Whether exceed default maximum permissible deviation value of (1) step by self-con-tained unit determining step (4) the gained deviation in the shield machine, if then carried out for (6) step; If not, then carried out for (7) step;
Step (6)-
The system for automatically correcting of using in the shield machine self-con-tained unit is rectified a deviation to the ahead running of shield machine, set the changeover portion that shield machine revert to the Tunnel Design axis apart from length, generate a matched curve on this changeover portion, to substitute the Tunnel Design axis, revert on the design axis with the guiding shield machine, carry out step (7) then;
Step (7)-
On the end face of shield tail segment assembly position, set in order to paste some positions of the maximum chock of thickness along circumference;
Step (8)-
Arrange out current ring by the self-con-tained unit in the shield machine and on the some positions that set, paste the maximum chock of thickness respectively, and the follow-up ring that splices is successively with it pasted the maximum chock of thickness respectively on the some positions that set, all section of jurisdiction permutation and combination methods of Xing Chenging calculate the pipe ring center of last ring in each section of jurisdiction permutation and combination method and the deviation of Tunnel Design axis or changeover portion matched curve simultaneously thus;
Step (9)-
Relatively the whole deviation of gained is calculated in (8) pacing in the self-con-tained unit of shield machine, and the scheme of deviation minimum wherein is defined as the pipe sheet assembling assembled scheme;
Step (10)-
The constructor confirms that according to experience (9) goes on foot the reasonability and the feasibility of the pipe sheet assembling assembled scheme of determining, and according to the pipe sheet assembling assembled scheme of confirming current ring is carried out installation.
4, method for rectifying and selecting tunnel segment according to claim 1 is characterized in that: described some positions are set on the end face of shield tail segment assembly position equably along circumference, and its quantity is identical with jack quantity in the shield machine.
5, method for rectifying and selecting tunnel segment according to claim 1 is characterized in that: the quantity of described follow-up ring is 2～5.
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|---|---|---|---|
| CNA2008102073694A CN101446201A (en) | 2008-12-19 | 2008-12-19 | Method for rectifying and selecting tunnel segment |
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|---|---|---|---|
| CNA2008102073694A CN101446201A (en) | 2008-12-19 | 2008-12-19 | Method for rectifying and selecting tunnel segment |
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