CN102155233B - Tunnel excavation construction method - Google Patents
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- CN102155233B CN102155233B CN 201110100807 CN201110100807A CN102155233B CN 102155233 B CN102155233 B CN 102155233B CN 201110100807 CN201110100807 CN 201110100807 CN 201110100807 A CN201110100807 A CN 201110100807A CN 102155233 B CN102155233 B CN 102155233B
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Abstract
The invention relates to a tunnel excavation construction method; an excavated tunnel comprises a first main line tunnel conventional segment, a first main line tunnel expansion segment, a second main line tunnel conventional segment, a second main line tunnel expansion section and a maximum cross section tunnel section; the method comprises the following steps of: firstly excavating the maximum cross section tunnel section, and then excavating in a transitional way from a big cross section to a smaller cross section of the maximum cross section tunnel segment, thereby realizing the excavation construction on a subway interval tunnel containing a junction line and a stop line in a big to small necked-down section mode. The method has the beneficial technical effects: (1) only one vertical shaft needs to be arranged, and the construction workload is less; (2) the overall process is in a transitional way from the big cross section to the smaller cross section, and the reverse expansion construction is not needed so as to avoid the risk of expansion excavation construction; (3) the excavation construction is carried out on the subway interval tunnel containing the junction line and the stop line in a big to small necked-down section mode, a roundabout pilot tunnel method is avoided from being used, the working procedures are simple, and the temporary first-lining workload is small.
Description
Technical field
The present invention relates to a kind of subway tunnel excavation construction method, relate in particular to a kind of excavation construction method that contains the subway sectional tunnel of branch-cut bridge and stop line.
Background technology
The main method that is used for the subway tunnel excavation construction at present comprises shield method and shallow burial hidden digging.So-called shallow burial hidden digging refers to the underground a kind of method of carrying out all kinds underground chamber tunneling construction nearer on the distance face of land.Shallow burial hidden digging is continued to use the New Austrian Tunneling Method basic principle, and preliminary bracing is by bearing all basic design load, and secondary lining is as safety stock; Preliminary bracing and secondary lining are born special load jointly.When using shallow burial hidden digging design, construction, adopt multiple auxiliary worker's method simultaneously, advance support improves and reinforces country rock, transfers the self-supporting ability of country rock; And adopt different excavation method immediate supports, seal into ring, make itself and country rock acting in conjunction form the combined supporting system; In work progress, by monitoring measurement, feedback information and optimal design, realize not caving in, lacking sedimentation, safe construction etc., and form the multiple technology of forming a complete and comprehensive system for collecting real estate fees.Characteristics such as the underground chamber of shallow burial hidden digging construction has buried depth shallow (minimum is covered and striden than reaching 0.2), formation lithology poor (being generally soft stratum in the Quaternary Period), have underground water (needing dewatering), surrounding environment complexity (contiguous existing build, structure).Because cost is low, remove less, flexible and changeable, special equipment reaches and does not disturb characteristics such as traffic above-ground and surrounding environment too much, shallow burial hidden digging is used widely in similar stratum, the whole nation and various underground construction.
For guaranteeing the normal operation rationally of urban track traffic, add stop line or branch-cut bridge along the line every 3～5 stations.If stop line has two purposes: the one, deposit a little as the fault passenger vehicle temporarily; The 2nd, deposit the operation passenger vehicle, shorten the upper and lower line service time that produced when starting operation in second day.And the purpose that branch-cut bridge is set is to make things convenient for passenger vehicle change route.
For the interval that stop line and branch-cut bridge are set, because the line style complexity, structure section changes many, and it is big to cause tunnel excavation to implement difficulty.If utilize shallow burial hidden digging to carry out the tunnel excavation construction, constructing in the section variation position of this segment to exist very big difficulty.
A kind of more common subway interval structure that contains branch-cut bridge and stop line as shown in Figure 1, wherein, the tunnel contour line that dotted line representative faces down and overlooks from ground, the subway interval that contains branch-cut bridge and stop line comprise first main track 1 (such as left line), second main track 2 (such as right line), stop line 3, be connected the branch-cut bridge 4 of first main track and stop line, be connected the branch-cut bridge 5 of second main track and stop line.Wherein, that main track is used for is up, another main track is used for descendingly, and stop line is used for fault passenger vehicle or the temporary parking of operation passenger vehicle, and branch-cut bridge is used for passenger vehicle and changes route between main track and stop line.
As shown in Figure 1, for the subway interval with this line construction, the tunnel that excavates comprises: the first main track tunnel conventional section 11, the first main track tunnel expanding reach 12, the second main track tunnel conventional section 13, the second main track tunnel expanding reach 14, branch-cut bridge tunnel construction sections 15, wherein, the conventional section 13 in conventional the section 11 or second main track tunnel, the first main track tunnel is only held first main track or second main track of single line, is single hole single-track tunnel; The first main track tunnel expanding reach 12 need hold the branch-cut bridge of first main track, stop line, connection first main track and stop line and the branch-cut bridge that is connected second main track and stop line, and this tunnel construction sections expands maximum bore tunnel section to gradually from minimum cross section; The branch-cut bridge that the second main track tunnel expanding reach 14 need hold second main track and connect second main track and stop line, this tunnel construction sections expands maximum bore tunnel section to gradually from minimum cross section; Branch-cut bridge tunnel construction sections 15 need hold the branch-cut bridge that connects second main track and stop line.
As shown in Figure 1, utilize shallow burial hidden digging that the existing method that the subway sectional tunnel that contains branch-cut bridge and stop line carries out excavation construction is generally comprised following steps:
(1) select correct position that vertical shaft 6 is set No. one in the first main track segment, and side direction opens ingate, excavate first transverse passage-way; First transverse passage-way runs through the conventional section in the first main track tunnel and the second main track tunnel expanding reach;
(2) excavate the conventional section in the first main track tunnel from first transverse passage-way, stop to the first main track tunnel expanding reach;
(3) excavate the second main track tunnel expanding reach from first transverse passage-way, conventional section stops to the second main track tunnel;
(4) select another correct position that vertical shaft 7 excavations second transverse passage-way is set No. two in the first main track segment, second transverse passage-way runs through the conventional section of the first main track tunnel expanding reach and the second main track tunnel;
(5) excavate the first main track tunnel expanding reach from second transverse passage-way, conventional section stops to the first main track tunnel;
(6) excavate the conventional section in the second main track tunnel from second transverse passage-way, stop to the second main track tunnel expanding reach;
(7) continue excavation branch-cut bridge tunnel construction sections from the first main track tunnel expanding reach;
Wherein, above-described each step can be carried out simultaneously, and also the interchangeable order is successively carried out.
Above job practices need relate to the change section construction that is carried out the transition to big section by light section gradually, at this moment needs to adopt little pilot tunnel to expand earlier and digs, oppositely expands the circuitous pilot tunnel method construction technology of digging.
When adopting above job practices to carry out the tunnel excavation construction, though the transverse passage-way easy construction, its deficiency comprises: (1) need arrange the many places vertical shaft, and the construction working amount is bigger.(2) it is bigger to carry out the transition to the change section difficulty of construction of big section gradually from light section, exists climbing to expand in the circuitous pilot tunnel method to dig, multiple unfavorable operating modes such as broken wall enters the hole, inverted sequence construction.(3) worker's method of Cai Yonging is various, has contained all worker's methods of hidden construction process such as intersection median septum method (CRD method), glasses working, middle hole method substantially; And the operation conversion is complicated between each section, and the interim engineering quantity of lining just is big.(4) carry out the transition to big section gradually from light section, particularly arrive maximum bore tunnel section, section variation is more violent, thereby increases the risk of avalanche.
Therefore, need develop a kind of new method the subway sectional tunnel that contains branch-cut bridge and stop line is carried out excavation construction.
Summary of the invention
In view of some defectives of prior art, the invention provides a kind of tunnel excavation job practices, technical problem to be solved is to realize in the mode of arrogant and little necked-down section the subway sectional tunnel that contains branch-cut bridge and stop line being carried out excavation construction.
In subway tunnel excavation construction method provided by the present invention, the tunnel that excavates comprises the conventional section in the first main track tunnel, the first main track tunnel expanding reach, the conventional section in the second main track tunnel, the second main track tunnel expanding reach, maximum bore tunnel section, and described method comprises the steps:
S100., vertical shaft is set and excavates transverse passage-way, the position of transverse passage-way is identical with the position of maximum bore tunnel section, and transverse passage-way spatially comprises maximum bore tunnel section;
S200. on a side section of transverse passage-way, excavate the second main track tunnel expanding reach earlier, excavate the conventional section in the first main track tunnel then;
S300. on the opposite side section of transverse passage-way, excavate the first main track tunnel expanding reach earlier, excavate the conventional section in the second main track tunnel then;
Wherein, above-described S100 step is at first carried out, and above-described S200, S300 steps in sequence are carried out or the transposing order is carried out successively;
The concrete implementation step of the excavation transverse passage-way described in the S100 step is:
S110. advance the hole outline line by transverse passage-way and cut vertical shaft and just serve as a contrast, and " order " type transverse passage-way hole ring beam is set simultaneously;
S120. three pilot tunnels in branch upper, middle and lower carry out the transverse passage-way excavation construction.
The crucial part of job practices provided by the present invention is, at first excavate maximum bore tunnel section, then from maximum bore tunnel Duan Youda section to than the light section transition, thereby realize in the mode of arrogant and little necked-down section the subway sectional tunnel that contains branch-cut bridge and stop line being carried out excavation construction.
Useful technique effect of the present invention is: (1) only need arrange place's vertical shaft, and the construction working amount is less; (2) overall process to than the light section transition, need not the anti-construction of expanding by big section, avoids expanding the excavation construction risk; (3) in the mode of arrogant and little necked-down section the subway sectional tunnel that contains branch-cut bridge and stop line is carried out excavation construction, avoid adopting circuitous pilot tunnel method, operation is simple, and the interim engineering quantity of lining just is little.
Description of drawings
Fig. 1 is structure and the tunnel excavation method schematic diagram that contains the subway interval of branch-cut bridge and stop line in the prior art.
Fig. 2 is the schematic diagram of subway tunnel excavation construction method among the present invention.
Fig. 3 is the front schematic view of transverse passage-way excavation construction method among the present invention.
Fig. 4 is the side schematic view of transverse passage-way excavation construction method among the present invention.
Fig. 5 is transverse passage-way of the present invention lining structure schematic diagram just.
Fig. 6 is transverse passage-way two lining structure schematic diagrames of the present invention.
Fig. 7 is the front schematic view that is entered the excavation construction method of conventional section and expanding reach among the present invention by transverse passage-way.
Among the figure: 1-first main track; 2-second main track; The 3-stop line; 4-connects the branch-cut bridge of first main track and stop line; 5-connects the branch-cut bridge of second main track and stop line; Vertical shaft of 6-; No. two vertical shafts of 7-; The 10-vertical shaft; The conventional section in the 11-first main track tunnel; The 12-first main track tunnel expanding reach; The conventional section in the 13-second main track tunnel; The 14-second main track tunnel expanding reach; 15-branch-cut bridge tunnel construction sections; The maximum bore tunnel section of 16-; The profile of the final transverse passage-way of 22-; 23-transverse passage-way two linings; The 24-transverse passage-way just serves as a contrast; 25-vault advance support; 26-core soil; 241-first is the lining dividing plate just; 242-second is the lining dividing plate just; 231-the one or two lining dividing plate; 232-the two or two lining dividing plate; 233-the three or two lining dividing plate; 31-expanding reach hole ring beam; The conventional section of 32-hole ring beam.
The specific embodiment
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete steps and generation, to understand purpose of the present invention, feature and effect fully.
As shown in Figure 2, in subway tunnel excavation construction method provided by the present invention, the tunnel that excavate comprises the first main track tunnel conventional section 11, the first main track tunnel expanding reach 12, the second main track tunnel conventional section 13, the second main track tunnel expanding reach 14, maximum bore tunnel section 16.Because method provided by the present invention is mainly used in containing the excavation construction of the subway sectional tunnel of branch-cut bridge and stop line, therefore, the conventional section in the said first main track tunnel refers to the tunnel construction sections that only holds first main track herein; The conventional section in the said second main track tunnel refers to the tunnel construction sections that only holds second main track herein; The said first main track tunnel expanding reach refers to herein, for the branch-cut bridge of holding first main track, stop line, connection first main track and stop line simultaneously, the branch-cut bridge that is connected second main track and stop line, section than the conventional section in the first main track tunnel obviously increases, and section has the tunnel construction sections of arrogant and little variation; The said second main track tunnel expanding reach refers to herein, in order to hold second main track and the branch-cut bridge that is connected second main track and stop line simultaneously, obviously increase than the section of the conventional section in the second main track tunnel, and section has the tunnel construction sections of arrogant and little variation; Said maximum bore tunnel section refers to herein, in order to realize being connected of main track, branch-cut bridge and stop line, on section, can hold main track, stop line, branch-cut bridge simultaneously, and by the tunnel construction sections with maximum section that forms that converges of the conventional section in the first main track tunnel, the first main track tunnel expanding reach, conventional section of the second main track tunnel, the second main track tunnel expanding reach.
Subway tunnel excavation construction method provided by the present invention comprises the steps:
S100., vertical shaft is set and excavates transverse passage-way, the position of transverse passage-way is identical with the position of maximum bore tunnel section, and transverse passage-way spatially comprises maximum bore tunnel section;
S200. on a side section of transverse passage-way, excavate the second main track tunnel expanding reach earlier, excavate the conventional section in the first main track tunnel then;
S300. on the opposite side section of transverse passage-way, excavate the first main track tunnel expanding reach earlier, excavate the conventional section in the second main track tunnel then;
Wherein, above-described S100 step is at first carried out, and above-described S200, S300 steps in sequence are carried out or the transposing order is carried out successively.
As shown in Figure 2, at above said S100 in the step, the position of transverse passage-way is exactly the position of the maximum bore tunnel section 16 that will excavate, and vertical shaft 10 then is positioned at the openings position of transverse passage-way; Transverse passage-way spatially comprises maximum bore tunnel section, institute refers to, in the section of transverse passage-way is included in maximum section fully, makes and on the section of transverse passage-way, can excavate the conventional section in the first main track tunnel, the second main track tunnel expanding reach, the conventional section in the second main track tunnel and the first main track tunnel expanding reach.That is to say that after transverse passage-way had excavated, the excavation of maximum bore tunnel section 16 had also just been finished.
A kind of preferred concrete implementation step of said excavation transverse passage-way can be in S100 goes on foot:
S110. advance the hole outline line by transverse passage-way and cut vertical shaft and just serve as a contrast, and " order " type transverse passage-way hole ring beam is set simultaneously;
S120. three pilot tunnels in branch upper, middle and lower carry out the transverse passage-way excavation construction.
As shown in Figure 3, after vertical shaft 10 constructions are finished, the vertical shaft that the profile of the transverse passage-way that need excavate as required on the vertical shaft sidewall cuts the relevant position just serves as a contrast, it should be noted that, because need to arrange just lining and two linings behind the transverse passage-way excavation, add transverse passage-way two linings 23 and transverse passage-way lining 24 just so when the vertical shaft sidewall arranges the profile of transverse passage-way, need comprise the profile 22 of final transverse passage-way.Cut vertical shaft just behind the lining, according to transverse passage-way just the outline line of lining 24 transverse passage-way hole ring beam is set, i.e. initial reinforced concrete circle beam is to support the partial pressure that the vertical shaft sidewall produces; More than said transverse passage-way hole ring beam be " order " type, the meaning of indication is just to serve as a contrast on the basis of outline line at the covering transverse passage-way, further increase the twice crossbeam transverse passage-way hole ring beam is divided into three holes, the purpose of this kind design is in order further to be divided into three pilot drive transverse passage-ways.
More than the reinforced concrete floor of the said refer to of lining just by preliminary bracing formation, play the temporary lining effect.Anchor and spray net form of structure is generally adopted in preliminary bracing, and general process flow is: the first pneumatically placed concrete in excavation back, system supporting construction (anchor pole, steel mesh reinforcement, steelframe), multiple pneumatically placed concrete are to design thickness.More than the reinforced concrete floor of said two lining refer tos by secondary lining formation, play permanent support with first lining.
After setting transverse passage-way hole ring beam, just can carry out the transverse passage-way excavation construction, of the present invention a kind of preferred embodiment be three the pilot drive transverse passage-ways in branch upper, middle and lower.Because be maximum section herein, if direct whole excavation can make easy avalanche, just divide three the pilot drive transverse passage-ways in upper, middle and lower can so that excavation so the transverse passage-way of height is safer.
As shown in Figure 3 and Figure 4, a kind of preferred concrete implementation step of carrying out the transverse passage-way excavation construction is:
S121. the vault advance support 25; S122. go up the pilot tunnel excavation of topping bar, and reserve core soil; S123. go up the preliminary bracing of pilot tunnel arch, remove core soil; S124. go up the pilot tunnel excavation of getting out of a predicament or an embarrassing situation; S125. go up the preliminary bracing of pilot tunnel inverted arch; S126. the middle pilot tunnel excavation of topping bar, and reserve core soil; S127. core soil is removed in middle pilot tunnel arch preliminary bracing; S128. the middle pilot tunnel excavation of getting out of a predicament or an embarrassing situation; S129. middle pilot tunnel inverted arch preliminary bracing; S130. descend pilot drive; S131. descend the pilot tunnel preliminary bracing.
Wherein, more than said vault advance support 25 refer to that the vault at transverse passage-way partly carries out advance support before top heading excavation, advance support utilize leading bassoon canopy or leading ductule, generally long 2～3 meters, be used for anchoring the place ahead country rock; Also can utilize grouting reinforcement rock and intercept water.
In carrying out the concrete implementation step of transverse passage-way excavation construction, comparative optimization be that the leading length of each pilot drive is 2～3m.
In the above-mentioned concrete implementation step of carrying out the transverse passage-way excavation construction, two pilot tunnels all adopt the benching tunnelling method construction in going up, and reserve core soil, can well control the distortion of pilot tunnel face, avoid because excavation causes arch and face excessive deformation.
After transverse passage-way excavation construction and corresponding preliminary bracing construction is finished, in transverse passage-way, just can form a side first lining 24 of " order " type transverse passage-way as shown in Figure 5, this just lining system comprise the first first first lining dividing plate 242 of lining dividing plate 241 and second from top to bottom; That is to say that in carrying out the transverse passage-way excavation construction, the first lining of formed transverse passage-way comprises that from top to bottom first just serves as a contrast dividing plate and second lining dividing plate just.On this basis, need proceed the transverse passage-way Second Lining Construction and form steel concrete two linings, be i.e. transverse passage-way two linings; As shown in Figure 6 and Figure 7, in carrying out the transverse passage-way excavation construction, formed transverse passage-way two linings 23 have following characteristics:
1) except covering the transverse passage-way surface of lining 24 just, transverse passage-way two linings 23 also comprise the one or two lining dividing plate 231, the two or two lining dividing plate 232, the three or two lining dividing plate 233 from top to bottom, with effective transverse passage-way dissymmetrical structure force-bearing situation, guarantee system safety improved; Wherein, the one or two lining dividing plate 231 is positioned at first and just serves as a contrast on the dividing plate 241, and the two or two lining dividing plate 232 and the first first lining dividing plate 241 and second just serve as a contrast between the dividing plate 242, and the three or two lining dividing plate 233 is positioned under the second first lining dividing plate 242;
2) on a side section of transverse passage-way, transverse passage-way two linings 23 are reserved the hole of the conventional section in the first main track tunnel and the second main track tunnel expanding reach, and openings position does not carry out two lining constructions; On the opposite side section of transverse passage-way, transverse passage-way two linings 23 are reserved the hole of the conventional section in the second main track tunnel and the first main track tunnel expanding reach, and openings position does not carry out two lining constructions.That is to say, reserve the execution conditions that enter the main track ingate when transverse passage-way two linings are built.
After transverse passage-way excavation construction and preliminary bracing, Second Lining Construction are finished, need excavate the conventional section in the first main track tunnel at a side section of transverse passage-way, and excavate the second main track tunnel expanding reach; In the conventional section in the opposite side section excavation second main track tunnel of transverse passage-way, and excavate the first main track tunnel expanding reach.
As shown in Figure 7, it is as follows to excavate the step of the first main track tunnel expanding reach or the second main track tunnel expanding reach:
S310. advance the hole outline line by the first main track tunnel expanding reach or the second main track tunnel expanding reach and cut transverse passage-way and just serve as a contrast, remove the first first first lining dividing plate of lining dividing plate and second;
S320. openings position arranges expanding reach hole ring beam 31, i.e. initial reinforced concrete circle beam with effective openings position stress of improving, satisfies simultaneously and divides a pilot tunnel to enter the hole to implement big section branch-cut bridge if tunnel conditions.The characteristics of expanding reach hole ring beam are, except covering the hole outline line, one crossbeam and twice vertical beam also are set expanding reach hole ring beam is divided into six holes, namely set in advance six pilot tunnels of excavation; In addition, the crossbeam of expanding reach hole ring beam is connected with the one or two lining dividing plate, the two or two lining dividing plate and the three or the two lining dividing plate of transverse passage-way with vertical beam, forms whole stress system, guarantees total system safety.
S330. after transverse passage-way two lining structures reach design strength, reserve the pilot tunnel position by expanding reach hole ring beam and adopt the double side wall pilot tunnel method to divide six pilot tunnels to carry out excavation construction; Along with the carrying out of tunnel construction sections excavation construction, the outline line of the first main track tunnel expanding reach or the second main track tunnel expanding reach carries out in the mode of arrogant and little necked-down section.
As shown in Figure 7, a kind of preferred steps that said employing double side wall pilot tunnel method divides six pilot tunnels to carry out excavation construction more than is:
S331. excavate pilot tunnel on the both sides simultaneously, carry out the preliminary bracing construction;
S332. excavate pilot tunnel under the both sides then simultaneously, carry out the preliminary bracing construction;
S333. go up pilot tunnel in the middle of the excavation, carry out the preliminary bracing construction;
S334. pilot tunnel under in the middle of the excavation carries out the preliminary bracing construction;
S335. carry out two lining constructions;
S336. remove the two or two lining dividing plate 232 of transverse passage-way;
Wherein, on the both sides under the relative both sides of pilot tunnel the leading length of pilot tunnel be 2～3m; The middle relatively leading length that goes up pilot tunnel of pilot tunnel is 2～3m under the both sides; The middle relatively leading length of pilot tunnel down of pilot tunnel is 2～3m on the centre.
As shown in Figure 7, it is as follows to excavate the step of the conventional section in the first main track tunnel or the conventional section in the second main track tunnel:
S210. advancing the hole outline line by the conventional section of the conventional section in the first main track tunnel or the second main track tunnel cuts transverse passage-way and just serves as a contrast;
S220., conventional section hole ring beam 32 is set;
S230. carry out excavation construction.
In method provided by the present invention, related step or substep there is no strict sequence limit in some cases.If know according to those skilled in the art, in various concrete construction environments and different object of construction production, according to the difference of using object and part restriction, for satisfying actual demands of engineering, step of the present invention can have transposing successively on the substep order, do not influence effect of the present invention.
The present invention is by said method and structure design, make contain branch-cut bridge, the enforcement of stop line bored tunnel obtains good result.The present invention is ingenious at multiple shallow buried covered excavation excavation method and structure setting method, constructed the multichannel technique defence line that interknits, multi-angle, guarantee to implement safety conscientiously at many levels, effectively the control large cross-section tunnel is implemented risk, and sending out enforcement underground space technical field in tunneling has wide utilization prospect.
Should be appreciated that, in claims of the present invention, manual, all " comprising ... " all are interpreted as open implication, and just its implication is equal to " containing at least ... ", and should not be construed as enclosed implication, namely its implication should not be construed " only comprising ... ".
In sum, described in this manual is several preferred embodiment of the present invention, and above embodiment is only unrestricted in order to technical scheme of the present invention to be described.All technician in the art all should be within claim protection domain of the present invention under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (9)
1. subway tunnel excavation construction method, described tunnel comprises the conventional section in the first main track tunnel, the first main track tunnel expanding reach, the conventional section in the second main track tunnel, the second main track tunnel expanding reach, maximum bore tunnel section, it is characterized in that described method comprises the steps:
S100., vertical shaft is set and excavates transverse passage-way, the position of transverse passage-way is identical with the position of maximum bore tunnel section, and transverse passage-way spatially comprises maximum bore tunnel section;
S200. on a side section of transverse passage-way, excavate the second main track tunnel expanding reach earlier, excavate the conventional section in the first main track tunnel then;
S300. on the opposite side section of transverse passage-way, excavate the first main track tunnel expanding reach earlier, excavate the conventional section in the second main track tunnel then;
Wherein, above-described S100 step is at first carried out, and above-described S200, S300 steps in sequence are carried out or the transposing order is carried out successively;
The concrete implementation step of the excavation transverse passage-way described in the S100 step is:
S110. advance the hole outline line by transverse passage-way and cut vertical shaft and just serve as a contrast, and " order " type transverse passage-way hole ring beam is set simultaneously;
S120. three pilot tunnels in branch upper, middle and lower carry out the transverse passage-way excavation construction.
2. method according to claim 1, wherein, described concrete implementation step of carrying out the transverse passage-way excavation construction is:
S121. vault advance support; S122. go up the pilot tunnel excavation of topping bar, and reserve core soil; S123. go up the preliminary bracing of pilot tunnel arch, remove core soil; S124. go up the pilot tunnel excavation of getting out of a predicament or an embarrassing situation; S125. go up the preliminary bracing of pilot tunnel inverted arch; S126. the middle pilot tunnel excavation of topping bar, and reserve core soil; S127. core soil is removed in middle pilot tunnel arch preliminary bracing; S128. the middle pilot tunnel excavation of getting out of a predicament or an embarrassing situation; S129. middle pilot tunnel inverted arch preliminary bracing; S130. descend pilot drive; S131. descend the pilot tunnel preliminary bracing.
3. method according to claim 2, wherein, the leading length of each pilot drive is 2～3m.
4. method according to claim 1 wherein, is carried out in the transverse passage-way excavation construction described, and the first lining of formed transverse passage-way comprises that from top to bottom first just serves as a contrast dividing plate and second lining dividing plate just.
5. method according to claim 4 wherein, is carried out in the transverse passage-way excavation construction described, and formed transverse passage-way two linings have following characteristics:
1) except covering the transverse passage-way surface of lining just, transverse passage-way two linings also comprise the one or two lining dividing plate, the two or two lining dividing plate, the three or two lining dividing plate from top to bottom; Wherein, the one or two lining dividing plate is positioned at first and just serves as a contrast on the dividing plate, and the two or two lining dividing plate and the first first lining dividing plate and second just serve as a contrast between the dividing plate, and the three or two lining dividing plate is positioned under the second first lining dividing plate;
2) on a side section of transverse passage-way, transverse passage-way two linings are reserved the hole of the conventional section in the first main track tunnel and the second main track tunnel expanding reach, and openings position does not carry out two lining constructions; On the opposite side section of transverse passage-way, transverse passage-way two linings are reserved the hole of the conventional section in the second main track tunnel and the first main track tunnel expanding reach, and openings position does not carry out two lining constructions.
6. method according to claim 5, wherein, the step of the described excavation first main track tunnel expanding reach or the second main track tunnel expanding reach is as follows:
S310. advance the hole outline line by the first main track tunnel expanding reach or the second main track tunnel expanding reach and cut transverse passage-way and just serve as a contrast, remove the first first first lining dividing plate of lining dividing plate and second;
S320. openings position arranges expanding reach hole ring beam, the characteristics of described expanding reach hole ring beam are: except covering the hole outline line, one crossbeam and twice vertical beam also are set expanding reach hole ring beam is divided into six holes, namely set in advance six pilot tunnels of excavation; In addition, the crossbeam of expanding reach hole ring beam is connected with the one or two lining dividing plate, the two or two lining dividing plate and the three or the two lining dividing plate of transverse passage-way with vertical beam;
S330. after transverse passage-way two lining structures reach design strength, reserve the pilot tunnel position by expanding reach hole ring beam and adopt the double side wall pilot tunnel method to divide six pilot tunnels to carry out excavation construction.
7. method according to claim 6, wherein, the step that described employing double side wall pilot tunnel method divides six pilot tunnels to carry out excavation construction is:
S331. excavate pilot tunnel on the both sides simultaneously, carry out the preliminary bracing construction;
S332. excavate pilot tunnel under the both sides then simultaneously, carry out the preliminary bracing construction;
S333. go up pilot tunnel in the middle of the excavation, carry out the preliminary bracing construction;
S334. pilot tunnel under in the middle of the excavation carries out the preliminary bracing construction;
S335. carry out two lining constructions;
S336. remove the two or two lining dividing plate of transverse passage-way.
8. method according to claim 7 wherein, is adopting the double side wall pilot tunnel method to divide six pilot tunnels to carry out in the process of excavation construction, on the both sides under the relative both sides of pilot tunnel the leading length of pilot tunnel be 2～3m; The middle relatively leading length that goes up pilot tunnel of pilot tunnel is 2～3m under the both sides; The middle relatively leading length of pilot tunnel down of pilot tunnel is 2～3m on the centre.
9. method according to claim 5, wherein, the step of the conventional section in the described excavation first main track tunnel or the conventional section in the second main track tunnel is as follows:
S210. advancing the hole outline line by the conventional section of the conventional section in the first main track tunnel or the second main track tunnel cuts transverse passage-way and just serves as a contrast;
S220., conventional section hole ring beam is set;
S230. carry out excavation construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110100807 CN102155233B (en) | 2011-04-21 | 2011-04-21 | Tunnel excavation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110100807 CN102155233B (en) | 2011-04-21 | 2011-04-21 | Tunnel excavation construction method |
Publications (2)
| Publication Number | Publication Date |
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| CN102155233A CN102155233A (en) | 2011-08-17 |
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