CN103775095B - The advanced two pilot tunnel in Ruan Ji tunnel, the mountain ridge and construction method thereof - Google Patents
The advanced two pilot tunnel in Ruan Ji tunnel, the mountain ridge and construction method thereof Download PDFInfo
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- CN103775095B CN103775095B CN201410066080.0A CN201410066080A CN103775095B CN 103775095 B CN103775095 B CN 103775095B CN 201410066080 A CN201410066080 A CN 201410066080A CN 103775095 B CN103775095 B CN 103775095B
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Abstract
The present invention relates to the advanced two pilot tunnel in Ruan Ji tunnel, a kind of mountain ridge and construction method thereof.Traditional mountain tunnel weak surrounding rock generally adopts two side-wall pilot tunnel to construct, but to Neogene system rich pigment packsand stratum DeGrain, by Multi-working-surface repeatedly construction disturbance affect, substrate soft rock phenomenon is serious.Tunnel excavation face is divided into 12 work planes (upper and lower step of left and right side base tunnel by the present invention, the upper and lower step of arch left and right side, middle step, side, left, center, right inverted arch), each work plane is ahead of subsequent work face successively, circulation excavation, performs respective preliminary bracing respectively after each work plane excavation, temporary lining is closed, and perform stull, temporary support is carried out in perpendicular support.Construction method of the present invention ensure that the integrally-built safety of stability and tunnel of substrate, meet the requirement of Tunnel Construction Schedule, reduce the risk of tunnel construction, be applicable to the comparatively severe rich pigment packsand of tunnel surrounding condition and texture stratum, construction safety, convenient, fast.
Description
Technical field
the invention belongs to traffic engineering technical field, be specifically related to the advanced two pilot tunnel in Ruan Ji tunnel, a kind of mountain ridge and construction method thereof.
Background technology
In rich pigment packsand (soil property) stratum, cementing Extra-fine sand rock stratum as weak in Neogene system shale, diagenesis is poor, and meet water and easily soften, face argillization phenomenon is obvious, substrate is softening in scattered paste shape, lose bearing capacity, cause tunnel deformation large, supporting destroys, phenomenon of caving in is very serious, construction speed is slow, difficulty of construction and risk high.Traditional mountain tunnel weak surrounding rock generally adopts CRD method or two side-wall pilot tunnel construction, tunnel excavation face is divided into multiple work plane, construction can be reduced to the disturbance of protolith and the effect on base tunnel advance reinforcement stratum, but it is not obvious to the rich pigment packsand stratum effect of Neogene system, by the impact of Multi-working-surface repeatedly construction disturbance, substrate soft rock phenomenon is but more serious.
Summary of the invention
The object of this invention is to provide the advanced two pilot tunnel in Ruan Ji tunnel, a kind of mountain ridge and construction method thereof, effectively can improve the efficiency of construction in Ruan Ji tunnel, rich pigment packsand (soil property) mountain ridge, reduce risk and the difficulty of construction.
The technical solution adopted in the present invention is:
The advanced two pilot tunnel construction method in Ruan Ji tunnel, the mountain ridge, is characterized in that:
Realized by following steps:
Step one: perform the left side base tunnel advance support be made up of left side base tunnel advance support ductule, under the protection of left side base tunnel advance support excavation left side base tunnel top bar and left side base tunnel get out of a predicament or an embarrassing situation, each excavation drilling depth is a Pin steelframe distance, and the face that left side base tunnel is topped bar is ahead of the face 200-300cm that left side base tunnel is got out of a predicament or an embarrassing situation; To top bar and the left side base tunnel outside of getting out of a predicament or an embarrassing situation and inner side perform left side base tunnel abutment wall preliminary bracing and left side base tunnel temporary lining respectively at left side base tunnel, and perform left side base tunnel stull in left side base tunnel bottom surface of getting out of a predicament or an embarrassing situation;
Step 2: perform the right side base tunnel advance support be made up of right side base tunnel advance support ductule, under the protection of right side base tunnel advance support excavation right side base tunnel top bar and right side base tunnel get out of a predicament or an embarrassing situation, each excavation drilling depth is a Pin steelframe distance, the face that right side base tunnel is topped bar is ahead of the face 200-300cm that right side base tunnel is got out of a predicament or an embarrassing situation, and the face that left side base tunnel is got out of a predicament or an embarrassing situation is ahead of the face 1000cm that right side base tunnel is topped bar; To top bar and base tunnel get out of a predicament or an embarrassing situation outside and inner side in right side performs right side base tunnel abutment wall preliminary bracing and right side base tunnel temporary lining respectively at right side base tunnel, and right side base tunnel get out of a predicament or an embarrassing situation bottom surface perform on the right side of base tunnel stull;
Step 3: perform arch, the left side advance support be made up of advance support ductule on the left of arch above the base tunnel of left side, excavate under the protection of arch, left side advance support on the left of arch and top bar, each excavation drilling depth is a Pin steelframe distance, and the face that right side base tunnel is got out of a predicament or an embarrassing situation is ahead of the face 2000-3000cm topped bar on the left of arch; Top bar on the left of arch outside and inner side performs the preliminary bracing and top, arch is perpendicular supports of topping bar on the left of arch respectively;
Get out of a predicament or an embarrassing situation on the left of excavation arch below topping bar on the left of arch, the face of topping bar on the left of arch is ahead of the face 200-300cm got out of a predicament or an embarrassing situation on the left of arch; Get out of a predicament or an embarrassing situation on the left of arch outside and inner side performs the preliminary bracing and bottom, arch is perpendicular supports of getting out of a predicament or an embarrassing situation on the left of arch respectively, and bottom surface of getting out of a predicament or an embarrassing situation on the left of arch performs stull on the left of arch;
Step 4: perform arch, the right side advance support be made up of advance support ductule on the right side of arch above the base tunnel of right side, under the protection of arch, right side advance support, excavate each excavation drilling depth of topping bar on the right side of arch is a Pin steelframe distance, and the face of getting out of a predicament or an embarrassing situation on the left of arch is ahead of the 1000cm that to top bar on the right side of arch; Top bar on the right side of arch respectively outside and inner side performs the preliminary bracing and top, arch is perpendicular supports of topping bar on the right side of arch;
Get out of a predicament or an embarrassing situation on the right side of excavation arch below topping bar on the right side of arch, the face of topping bar on the right side of arch is ahead of the face 200-300cm got out of a predicament or an embarrassing situation on the right side of arch; Get out of a predicament or an embarrassing situation on the right side of arch outside and inner side performs the preliminary bracing and bottom, arch is perpendicular supports of getting out of a predicament or an embarrassing situation on the right side of arch respectively, and bottom surface of getting out of a predicament or an embarrassing situation on the right side of arch performs stull on the right side of arch;
Step 5: the middle step in inclined-plane between excavation left side base tunnel and right side base tunnel, each excavation drilling depth is a Pin steelframe distance, and the face of getting out of a predicament or an embarrassing situation on the right side of arch is ahead of forefront, the inclined-plane 1000cm of middle step; Step stull in middle bench floor performs, in fall in middle step stull performs the perpendicular support of step;
Step 6: repetition step one is to step 5 2-3 circulation, and inverted arch on the left of below excavation got out of a predicament or an embarrassing situation by left side base tunnel, performs left side inverted arch preliminary bracing and left side inverted arch temporary lining respectively with inner side bottom the inverted arch of left side; Inverted arch on the right side of below excavation got out of a predicament or an embarrassing situation by right side base tunnel, performs right side inverted arch preliminary bracing and right side inverted arch temporary lining respectively with inner side bottom the inverted arch of right side; Between left side inverted arch and right side inverted arch, excavation middle part inverted arch, performs middle part inverted arch preliminary bracing bottom the inverted arch of middle part;
Left side inverted arch, middle part inverted arch are identical with the excavation drilling depth of right side inverted arch, and forming same face is inverted arch excavation face, along being ahead of inverted arch excavation face 200-300cm at the bottom of the inclined-plane of middle step;
Step 7: repetition step 6 is constructed after some circulations, and each temporary lining is removed in segmentation; Inside left side inverted arch preliminary bracing, middle part inverted arch preliminary bracing and right side inverted arch preliminary bracing, perform inverted arch two lining, and perform filling at the bottom of tunnel; Topping bar on the left of arch gets out of a predicament or an embarrassing situation on the left of preliminary bracing, arch to top bar on the right side of preliminary bracing, left side base tunnel abutment wall preliminary bracing, arch to get out of a predicament or an embarrassing situation on the right side of preliminary bracing, arch inside preliminary bracing and right side base tunnel abutment wall preliminary bracing and performs arch wall two lining.
The advanced two pilot tunnel structure in Ruan Ji tunnel, the mountain ridge, is characterized in that:
In tunnel, both sides are provided with left side base tunnel and right side base tunnel;
Base tunnel interior excavation in left side has left side base tunnel to top bar and left side base tunnel is got out of a predicament or an embarrassing situation, and the face that left side base tunnel is topped bar is ahead of the face 200-300cm that left side base tunnel is got out of a predicament or an embarrassing situation; Be left side base tunnel abutment wall preliminary bracing outside the base tunnel of left side, inner side is left side base tunnel temporary lining, and bottom is left side base tunnel stull;
Right side excavation with guide pit has right side base tunnel to top bar and right side base tunnel is got out of a predicament or an embarrassing situation, the face that right side base tunnel is topped bar is ahead of the face 200-300cm that right side base tunnel is got out of a predicament or an embarrassing situation, and the face that left side base tunnel is got out of a predicament or an embarrassing situation is ahead of the face 1000cm that right side base tunnel is topped bar; Be right side base tunnel abutment wall preliminary bracing outside the base tunnel of right side, inner side is right side base tunnel temporary lining, and bottom is right side base tunnel stull;
Excavate above the base tunnel of left side to have and top bar on the left of arch and get out of a predicament or an embarrassing situation on the left of arch, the face that right side base tunnel is got out of a predicament or an embarrassing situation is ahead of the face 2000-3000cm topped bar on the left of arch, and the face of topping bar on the left of arch is ahead of the face 200-300cm got out of a predicament or an embarrassing situation on the left of arch; Outside top bar on the left of arch for preliminary bracing of topping bar on the left of arch, and inner side is the perpendicular support in top, arch; Outside get out of a predicament or an embarrassing situation on the left of arch for preliminary bracing of getting out of a predicament or an embarrassing situation on the left of arch, and inner side is the perpendicular support in bottom, arch, and bottom is stull on the left of arch;
Above the base tunnel of right side, excavation has and to top bar on the right side of arch and get out of a predicament or an embarrassing situation on the right side of arch, and the face of getting out of a predicament or an embarrassing situation on the left of arch is ahead of the 1000cm that to top bar on the right side of arch, and the face of topping bar on the right side of arch is ahead of the face 200-300cm got out of a predicament or an embarrassing situation on the right side of arch; Outside top bar on the right side of arch for preliminary bracing of topping bar on the right side of arch, and inner side is the perpendicular support in top, arch; Outside get out of a predicament or an embarrassing situation on the right side of arch for preliminary bracing of getting out of a predicament or an embarrassing situation on the right side of arch, and inner side is the perpendicular support in bottom, arch, and bottom is stull on the right side of arch;
Excavate in step in inclined-plane between left side base tunnel and right side base tunnel, the face of getting out of a predicament or an embarrassing situation on the right side of arch is ahead of forefront, the inclined-plane 1000cm of middle step; Middle bench floor is middle step stull, in fall in middle step stull and performed the perpendicular support of middle step;
Below the base tunnel of left side, excavation has left side inverted arch, and be left side inverted arch preliminary bracing bottom the inverted arch of left side, inner side is left side inverted arch temporary lining; Below the base tunnel of right side, excavation has right side inverted arch, and be right side inverted arch preliminary bracing bottom the inverted arch of right side, inner side is right side inverted arch temporary lining; Below middle step, excavation has middle part inverted arch, is middle part inverted arch preliminary bracing bottom the inverted arch of middle part; Left side inverted arch, middle part inverted arch and right side inverted arch are in same face, i.e. inverted arch excavation face, along being ahead of inverted arch excavation face 200-300cm at the bottom of the inclined-plane of middle step.
Be provided with the left side base tunnel advance support be made up of left side base tunnel advance support ductule inside the base tunnel of left side, left side base tunnel temporary lining performs in the base tunnel advance support of left side;
Be provided with the right side base tunnel advance support be made up of right side base tunnel advance support ductule inside the base tunnel of right side, right side base tunnel temporary lining performs in the base tunnel advance support of right side;
The arranged outside of topping bar on the left of arch and get out of a predicament or an embarrassing situation on the left of arch is by arch, the left side advance support be made up of advance support ductule on the left of arch, and preliminary bracing of getting out of a predicament or an embarrassing situation on the left of top bar on the left of arch preliminary bracing and arch performs in the advance support of arch, left side;
The arranged outside of topping bar on the right side of arch and get out of a predicament or an embarrassing situation on the right side of arch is by arch, the right side advance support be made up of advance support ductule on the right side of arch, and preliminary bracing of getting out of a predicament or an embarrassing situation on the right side of top bar on the right side of arch preliminary bracing and arch performs in the advance support of arch, right side.
The present invention has the following advantages:
The present invention adopts the advanced method construction of two pilot tunnel, and (left side base tunnel is topped bar tunnel excavation face to be divided into 12 work planes, left side base tunnel is got out of a predicament or an embarrassing situation, right side base tunnel is topped bar, right side base tunnel is got out of a predicament or an embarrassing situation, top bar on the left of arch, get out of a predicament or an embarrassing situation on the left of arch, top bar on the right side of arch, get out of a predicament or an embarrassing situation on the right side of arch, middle step, left side inverted arch, middle part inverted arch and right side inverted arch), each work plane is ahead of next work plane successively, the operation of circulation excavation, performs respective preliminary bracing respectively and (add up to nine parts, be respectively left side base tunnel abutment wall preliminary bracing after each work plane excavation, right side base tunnel abutment wall preliminary bracing, to top bar on the left of arch preliminary bracing, to get out of a predicament or an embarrassing situation on the left of arch preliminary bracing, to top bar on the right side of arch preliminary bracing, to get out of a predicament or an embarrassing situation on the right side of arch preliminary bracing, left side inverted arch preliminary bracing, middle part inverted arch preliminary bracing, right side inverted arch preliminary bracing) close, and perform stull, temporary support is carried out in perpendicular support, ensure that the integrally-built safety of stability and tunnel of substrate, meet the requirement of Tunnel Construction Schedule, reduce the risk of tunnel construction, be applicable to the comparatively severe rich pigment packsand of tunnel surrounding condition and texture stratum, construction safety, convenient, fast.
Accompanying drawing explanation
Fig. 1 is the advanced two pilot tunnel cross section constructing structure figure in Ruan Ji tunnel, the mountain ridge.
Fig. 2 is the advanced two pilot tunnel longitudinal section constructing structure figure in Ruan Ji tunnel, the mountain ridge.
Fig. 3 is the advanced two pilot tunnel plane constructing structure figure in Ruan Ji tunnel, the mountain ridge.
In figure, on the left of 1-, base tunnel is topped bar, on the left of 2-, base tunnel is got out of a predicament or an embarrassing situation, on the right side of 3-, base tunnel is topped bar, on the right side of 4-, base tunnel is got out of a predicament or an embarrassing situation, 5-tops bar on the left of arch, 6-gets out of a predicament or an embarrassing situation on the left of arch, 7-tops bar on the right side of arch, 8-gets out of a predicament or an embarrassing situation on the right side of arch, step in 9-, inverted arch on the left of 10-, inverted arch in the middle part of 11-, inverted arch on the right side of 12-, base tunnel advance support ductule on the left of 13-, base tunnel temporary lining on the left of 14-, base tunnel abutment wall preliminary bracing on the left of 15-, base tunnel stull on the left of 16-, base tunnel advance support ductule on the right side of 17-, base tunnel temporary lining on the right side of 18-, base tunnel abutment wall preliminary bracing on the right side of 19-, base tunnel stull on the right side of 20-, advance support ductule on the left of 21-arch, to top bar on the left of 22-arch preliminary bracing, the perpendicular support in top, 23-arch, to get out of a predicament or an embarrassing situation on the left of 24-arch preliminary bracing, the perpendicular support in bottom, 25-arch, stull on the left of 26-arch, advance support ductule on the right side of 27-arch, to top bar on the right side of 28-arch preliminary bracing, to get out of a predicament or an embarrassing situation on the right side of 29-arch preliminary bracing, stull on the right side of 30-arch, inverted arch preliminary bracing on the left of 31-, inverted arch preliminary bracing in the middle part of 32-, inverted arch preliminary bracing on the right side of 33-, 34-inverted arch two serves as a contrast, 35-arch wall two serves as a contrast, step stull in 36-, the perpendicular support of step in 37-, the perpendicular support of inverted arch on the left of 38-, the perpendicular support of inverted arch on the right side of 39-.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be described in detail.
The advanced two pilot tunnel construction method in Ruan Ji tunnel, the mountain ridge involved in the present invention, adopt the advanced method construction of two pilot tunnel, see Fig. 1, on the left of tunnel excavation face being divided into 12 work planes, base tunnel is topped bar, left side base tunnel is got out of a predicament or an embarrassing situation, right side base tunnel is topped bar, right side base tunnel is got out of a predicament or an embarrassing situation, top bar on the left of arch, get out of a predicament or an embarrassing situation on the left of arch, top bar on the right side of arch, get out of a predicament or an embarrassing situation on the right side of arch, middle step, left side inverted arch, middle part inverted arch and right side inverted arch, each work plane is ahead of next work plane successively, the operation of circulation excavation, performs respective preliminary bracing respectively and add up to nine parts after each work plane excavation, is respectively left side base tunnel abutment wall preliminary bracing, right side base tunnel abutment wall preliminary bracing, to top bar on the left of arch preliminary bracing, to get out of a predicament or an embarrassing situation on the left of arch preliminary bracing, to top bar on the right side of arch preliminary bracing, to get out of a predicament or an embarrassing situation on the right side of arch preliminary bracing, left side inverted arch preliminary bracing, middle part inverted arch preliminary bracing, right side inverted arch preliminary bracing is closed, and performs stull, temporary support is carried out in perpendicular support, and Specific construction step is as follows:
Step one: perform the left side base tunnel advance support be made up of left side base tunnel advance support ductule 13, under the protection of left side base tunnel advance support excavation left side base tunnel top bar 1 and left side base tunnel get out of a predicament or an embarrassing situation 2, each excavation drilling depth is a Pin steelframe distance, left side base tunnel top bar 1 face be ahead of left side base tunnel get out of a predicament or an embarrassing situation 2 face 200-300cm; Left side base tunnel top bar 1 and left side base tunnel get out of a predicament or an embarrassing situation 2 outside and inner side perform left side base tunnel abutment wall preliminary bracing 15 and left side base tunnel temporary lining 14 respectively, mainly comprise the thick C20 of sprayed mortar 5cm, frame founds profile steel frame, set anchor pole and hang steel mesh reinforcement, and perform left side base tunnel stull 16 in left side base tunnel 2 bottom surfaces of getting out of a predicament or an embarrassing situation;
Step 2: perform the right side base tunnel advance support be made up of right side base tunnel advance support ductule 17, under the protection of right side base tunnel advance support excavation right side base tunnel top bar 3 and right side base tunnel get out of a predicament or an embarrassing situation 4, each excavation drilling depth is a Pin steelframe distance, right side base tunnel top bar 3 face be ahead of right side base tunnel get out of a predicament or an embarrassing situation 4 face 200-300cm, left side base tunnel get out of a predicament or an embarrassing situation 2 face be ahead of right side base tunnel top bar 3 face 1000cm; 3 and right side base tunnel is got out of a predicament or an embarrassing situation outside 4 and inner side performs right side base tunnel abutment wall preliminary bracing 19 and right side base tunnel temporary lining 18 are respectively topped bar at right side base tunnel, mainly comprise the thick C20 of sprayed mortar 5cm, frame founds profile steel frame, set anchor pole and hang steel mesh reinforcement, and perform right side base tunnel stull 20 in right side base tunnel 4 bottom surfaces of getting out of a predicament or an embarrassing situation;
Step 3: perform arch, the left side advance support be made up of advance support ductule 21 on the left of arch above the base tunnel of left side, excavate under the protection of arch, left side advance support on the left of arch and top bar 5, each excavation drilling depth is a Pin steelframe distance, right side base tunnel get out of a predicament or an embarrassing situation 4 face be ahead of to top bar on the left of arch 5 face 2000-3000cm; Top bar outside 5 on the left of arch and inner side performs to top bar on the left of arch preliminary bracing 22 and top, arch respectively and erects support 23, mainly comprise the thick C20 of sprayed mortar 5cm, frame founds profile steel frame, set anchor pole and hang steel mesh reinforcement;
Top bar to excavate on the left of arch below 5 on the left of arch and get out of a predicament or an embarrassing situation 6, top bar on the left of arch 5 face be ahead of to get out of a predicament or an embarrassing situation on the left of arch 6 face 200-300cm; Get out of a predicament or an embarrassing situation outside 6 on the left of arch and inner side performs to get out of a predicament or an embarrassing situation on the left of arch preliminary bracing 24 and bottom, arch respectively and erects support 25,6 bottom surfaces of getting out of a predicament or an embarrassing situation on the left of arch perform stull 26 on the left of arch, mainly comprise the thick C20 of sprayed mortar 5cm, frame founds profile steel frame, set anchor pole and hang steel mesh reinforcement;
Step 4: perform arch, the right side advance support be made up of advance support ductule 27 on the right side of arch above the base tunnel of right side, excavate under the protection of arch, right side advance support to top bar on the right side of arch 7 at every turn excavation drilling depths be a Pin steelframe distance, get out of a predicament or an embarrassing situation on the left of arch 6 face be ahead of 7 1000cm that to top bar on the right side of arch; Top bar outside 7 respectively on the right side of arch and inner side performs to top bar on the right side of arch preliminary bracing 28 and top, arch and erects support 23, mainly comprise the thick C20 of sprayed mortar 5cm, frame founds profile steel frame, set anchor pole and hang steel mesh reinforcement;
Top bar to excavate on the right side of arch below 7 on the right side of arch and get out of a predicament or an embarrassing situation 8, top bar on the right side of arch 7 face be ahead of to get out of a predicament or an embarrassing situation on the right side of arch 8 face 200-300cm; Get out of a predicament or an embarrassing situation outside 8 on the right side of arch and inner side performs to get out of a predicament or an embarrassing situation on the right side of arch preliminary bracing 29 and bottom, arch respectively and erects support 25,8 bottom surfaces of getting out of a predicament or an embarrassing situation on the right side of arch perform stull 30 on the right side of arch, mainly comprise the thick C20 of sprayed mortar 5cm, frame founds profile steel frame, set anchor pole and hang steel mesh reinforcement;
Step 5: between excavation left side base tunnel and right side base tunnel, (gradient is generally 1:0.2 in inclined-plane, suitably can adjust according to country rock situation) middle step 9, each excavation drilling depth is a Pin steelframe distance, get out of a predicament or an embarrassing situation on the right side of arch 8 face be ahead of forefront, the inclined-plane 1000cm of middle step 9; Step stull 36 in middle step 9 bottom surface performs, in fall in step in middle step stull 36 performs and erect support 37, mainly comprise the thick C20 of sprayed mortar 5cm, frame found profile steel frame, set anchor pole and hang steel mesh reinforcement;
Step 6: repeat step one to step 5 2-3 circulation, to get out of a predicament or an embarrassing situation excavation left side inverted arch 10 below 2 at left side base tunnel, bottom left side inverted arch 10, perform left side inverted arch preliminary bracing 31 and left side inverted arch temporary lining 38 respectively with inner side, mainly comprise the thick C20 of sprayed mortar 5cm, frame founds profile steel frame, set anchor pole and hang steel mesh reinforcement; To get out of a predicament or an embarrassing situation excavation right side inverted arch 12 below 4 at right side base tunnel, bottom right side inverted arch 12, perform right side inverted arch preliminary bracing 33 and right side inverted arch temporary lining 39 respectively with inner side, mainly comprise the thick C20 of sprayed mortar 5cm, frame founds profile steel frame, set anchor pole and hang steel mesh reinforcement; Between left side inverted arch 10 and right side inverted arch, excavation middle part inverted arch 11, performs middle part inverted arch preliminary bracing 32, mainly comprises the thick C20 of sprayed mortar 5cm, frame founds profile steel frame, set anchor pole and hang steel mesh reinforcement bottom middle part inverted arch 11;
Left side inverted arch 10, middle part inverted arch 11 are identical with the excavation drilling depth of right side inverted arch 12, and forming same face is inverted arch excavation face, along being ahead of inverted arch excavation face 200-300cm at the bottom of the inclined-plane of middle step 9;
Step 7: repetition step 6 is constructed after some circulations, and each temporary lining is removed in segmentation, removes length and determines according to after monitoring measurement interpretation of result, and once removing length must not be greater than 10m; Inside left side inverted arch preliminary bracing 31, middle part inverted arch preliminary bracing 32 and right side inverted arch preliminary bracing 33, perform inverted arch two serve as a contrast 34, and perform filling at the bottom of tunnel; Topping bar on the left of arch gets out of a predicament or an embarrassing situation on the left of preliminary bracing 22, arch to top bar on the right side of preliminary bracing 24, left side base tunnel abutment wall preliminary bracing 15, arch to get out of a predicament or an embarrassing situation on the right side of preliminary bracing 28, arch and performs arch wall two inside preliminary bracing 29 and right side base tunnel abutment wall preliminary bracing 19 and serve as a contrast 35.
Content of the present invention is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading manual of the present invention to any equivalence that technical solution of the present invention is taked, is claim of the present invention and contains.
Claims (3)
1. the advanced two pilot tunnel construction method in mountain ridge Ruan Ji tunnel, is characterized in that:
Realized by following steps:
Step one: perform the left side base tunnel advance support be made up of left side base tunnel advance support ductule (13), under the protection of left side base tunnel advance support, excavation left side base tunnel is topped bar (1) and left side base tunnel gets out of a predicament or an embarrassing situation (2), each excavation drilling depth is a Pin steelframe distance, and base tunnel the top bar face of (1) in left side is ahead of left side base tunnel and gets out of a predicament or an embarrassing situation the face 200-300cm of (2); In left side, base tunnel is topped bar (1) and base tunnel the get out of a predicament or an embarrassing situation outside of (2) and inner side in left side performs left side base tunnel abutment wall preliminary bracing (15) and left side base tunnel temporary lining (14) respectively, and left side base tunnel get out of a predicament or an embarrassing situation (2) bottom surface perform on the left of base tunnel stull (16);
Step 2: perform the right side base tunnel advance support be made up of right side base tunnel advance support ductule (17), under the protection of right side base tunnel advance support, excavation right side base tunnel is topped bar (3) and right side base tunnel gets out of a predicament or an embarrassing situation (4), each excavation drilling depth is a Pin steelframe distance, base tunnel the top bar face of (3) in right side is ahead of right side base tunnel and gets out of a predicament or an embarrassing situation the face 200-300cm of (4), and base tunnel the get out of a predicament or an embarrassing situation face of (2) in left side is ahead of right side base tunnel and tops bar the face 1000cm of (3); On right side, base tunnel is topped bar (3) and base tunnel get out of a predicament or an embarrassing situation (4) outside and inner side in right side performs right side base tunnel abutment wall preliminary bracing (19) and right side base tunnel temporary lining (18) respectively, and right side base tunnel get out of a predicament or an embarrassing situation (4) bottom surface perform on the right side of base tunnel stull (20);
Step 3: perform arch, the left side advance support be made up of advance support ductule (21) on the left of arch above the base tunnel of left side, excavate under the protection of arch, left side advance support on the left of arch and top bar (5), each excavation drilling depth is a Pin steelframe distance, and base tunnel the get out of a predicament or an embarrassing situation face of (4) in right side is ahead of on the left of arch the face 2000-3000cm of top bar (5); Top bar on the left of arch (5) outside and inner side performs to top bar on the left of arch preliminary bracing (22) and top, arch respectively and erects and support (23);
Top bar on the left of arch (5) below excavation arch on the left of get out of a predicament or an embarrassing situation (6), the face of top bar on the left of arch (5) is ahead of on the left of arch the face 200-300cm of get out of a predicament or an embarrassing situation (6); Get out of a predicament or an embarrassing situation on the left of arch (6) outside and inner side performs to get out of a predicament or an embarrassing situation on the left of arch preliminary bracing (24) and bottom, arch respectively and erects and support (25), and (6) bottom surface of getting out of a predicament or an embarrassing situation on the left of arch performs stull on the left of arch (26);
Step 4: perform arch, the right side advance support be made up of advance support ductule (27) on the right side of arch above the base tunnel of right side, excavate under the protection of arch, right side advance support to top bar on the right side of arch (7) at every turn excavation drilling depth be a Pin steelframe distance, the face of get out of a predicament or an embarrassing situation on the left of arch (6) is ahead of on the right side of arch (7) 1000cm that tops bar; Top bar on the right side of arch respectively (7) outside and inner side performs to top bar on the right side of arch preliminary bracing (28) and top, arch and erects and support (23);
Top bar on the right side of arch (7) below excavation arch on the right side of get out of a predicament or an embarrassing situation (8), the face of top bar on the right side of arch (7) is ahead of on the right side of arch the face 200-300cm of get out of a predicament or an embarrassing situation (8); Get out of a predicament or an embarrassing situation on the right side of arch (8) outside and inner side performs to get out of a predicament or an embarrassing situation on the right side of arch preliminary bracing (29) and bottom, arch respectively and erects and support (25), and (8) bottom surface of getting out of a predicament or an embarrassing situation on the right side of arch performs stull on the right side of arch (30);
Step 5: the middle step (9) in inclined-plane between excavation left side base tunnel and right side base tunnel, each excavation drilling depth is a Pin steelframe distance, and the face of get out of a predicament or an embarrassing situation on the right side of arch (8) is ahead of forefront, the inclined-plane 1000cm of middle step (9); Perform middle step stull (36) in middle step (9) bottom surface, in fall in middle step stull (36) and perform the perpendicular support (37) of middle step;
Step 6: repeat step one to step 5 2-3 circulation, in left side, base tunnel is got out of a predicament or an embarrassing situation (2) below excavation left side inverted arch (10), inverted arch preliminary bracing (31) and left side inverted arch temporary lining (38) on the left of left side inverted arch (10) bottom and inner side perform respectively; On right side, base tunnel is got out of a predicament or an embarrassing situation (4) below excavation right side inverted arch (12), inverted arch preliminary bracing (33) and right side inverted arch temporary lining (39) on the right side of right side inverted arch (12) bottom and inner side perform respectively; Excavation middle part inverted arch (11) between left side inverted arch (10) and right side inverted arch, performs middle part inverted arch preliminary bracing (32) in middle part inverted arch (11) bottom;
Left side inverted arch (10), middle part inverted arch (11) is identical with the excavation drilling depth of right side inverted arch (12), and forming same face is inverted arch excavation face, excavates face 200-300cm at the bottom of the inclined-plane of middle step (9) along being ahead of inverted arch;
Step 7: repetition step 6 is constructed after some circulations, and each temporary lining is removed in segmentation; In left side inverted arch preliminary bracing (31), middle part inverted arch preliminary bracing (32) and inner side, right side inverted arch preliminary bracing (33) perform inverted arch two and serve as a contrast (34), and perform at the bottom of tunnel and fill; Topping bar on the left of arch gets out of a predicament or an embarrassing situation on the left of preliminary bracing (22), arch, and to top bar on the right side of preliminary bracing (24), left side base tunnel abutment wall preliminary bracing (15), arch to get out of a predicament or an embarrassing situation on the right side of preliminary bracing (28), arch preliminary bracing (29) and inner side, right side base tunnel abutment wall preliminary bracing (19) performs arch wall two and serves as a contrast (35).
2. the advanced two pilot tunnel structure in mountain ridge Ruan Ji tunnel, is characterized in that:
In tunnel, both sides are provided with left side base tunnel and right side base tunnel;
In the base tunnel of left side, excavation has left side base tunnel to top bar (1) and left side base tunnel is got out of a predicament or an embarrassing situation (2), left side base tunnel top bar the face of (1) be ahead of on the left of base tunnel to get out of a predicament or an embarrassing situation the face 200-300cm of (2); Be left side base tunnel abutment wall preliminary bracing (15) outside the base tunnel of left side, inner side is left side base tunnel temporary lining (14), and bottom is left side base tunnel stull (16);
Right side excavation with guide pit has right side base tunnel to top bar (3) and right side base tunnel gets out of a predicament or an embarrassing situation (4), base tunnel the top bar face of (3) in right side is ahead of right side base tunnel and gets out of a predicament or an embarrassing situation the face 200-300cm of (4), and base tunnel the get out of a predicament or an embarrassing situation face of (2) in left side is ahead of right side base tunnel and tops bar the face 1000cm of (3); Be right side base tunnel abutment wall preliminary bracing (19) outside the base tunnel of right side, inner side is right side base tunnel temporary lining (18), and bottom is right side base tunnel stull (20);
Excavate to have on the left of arch on the left of top bar (5) and arch above the base tunnel of left side and get out of a predicament or an embarrassing situation (6), base tunnel the get out of a predicament or an embarrassing situation face of (4) in right side is ahead of on the left of arch the face 2000-3000cm of top bar (5), and the face of top bar on the left of arch (5) is ahead of on the left of arch the face 200-300cm of get out of a predicament or an embarrassing situation (6); (5) outside top bar on the left of arch for preliminary bracing (22) of topping bar on the left of arch, and inner side is the perpendicular support (23) in top, arch; (6) outside get out of a predicament or an embarrassing situation on the left of arch for preliminary bracing (24) of getting out of a predicament or an embarrassing situation on the left of arch, and inner side is the perpendicular support (25) in bottom, arch, and bottom is stull on the left of arch (26);
Excavate to have on the right side of arch on the right side of top bar (7) and arch above the base tunnel of right side and get out of a predicament or an embarrassing situation (8), the face of (6) of getting out of a predicament or an embarrassing situation on the left of arch is ahead of on the right side of arch (7) 1000cm that tops bar, and the face of top bar on the right side of arch (7) is ahead of on the right side of arch the face 200-300cm of get out of a predicament or an embarrassing situation (8); (7) outside top bar on the right side of arch for preliminary bracing (28) of topping bar on the right side of arch, and inner side is the perpendicular support (23) in top, arch; (8) outside get out of a predicament or an embarrassing situation on the right side of arch for preliminary bracing (29) of getting out of a predicament or an embarrassing situation on the right side of arch, and inner side is the perpendicular support (25) in bottom, arch, and bottom is stull on the right side of arch (30);
Excavate in step in inclined-plane (9) between left side base tunnel and right side base tunnel, the face of get out of a predicament or an embarrassing situation on the right side of arch (8) is ahead of forefront, the inclined-plane 1000cm of middle step (9); Middle step (9) bottom surface is middle step stull (36), in fall in middle step stull (36) and performed the perpendicular support (37) of middle step;
Below the base tunnel of left side, excavation has left side inverted arch (10), and left side inverted arch (10) bottom is left side inverted arch preliminary bracing (31), and inner side is left side inverted arch temporary lining (38); Below the base tunnel of right side, excavation has right side inverted arch (12), and right side inverted arch (12) bottom is right side inverted arch preliminary bracing (33), and inner side is right side inverted arch temporary lining (39); Middle step (9) below excavation has middle part inverted arch (11), and middle part inverted arch (11) bottom is middle part inverted arch preliminary bracing (32); Left side inverted arch (10), middle part inverted arch (11) and right side inverted arch (12) are in same face, i.e. inverted arch excavation face, along being ahead of inverted arch excavation face 200-300cm at the bottom of the inclined-plane of middle step (9).
3. the advanced two pilot tunnel structure in Ruan Ji tunnel, the mountain ridge according to claim 2, is characterized in that:
Be provided with the left side base tunnel advance support be made up of left side base tunnel advance support ductule (13) inside the base tunnel of left side, left side base tunnel temporary lining (14) performs in the base tunnel advance support of left side;
Be provided with the right side base tunnel advance support be made up of right side base tunnel advance support ductule (17) inside the base tunnel of right side, right side base tunnel temporary lining (18) performs in the base tunnel advance support of right side;
To get out of a predicament or an embarrassing situation on the left of (5) and the arch arranged outside of (6) of topping bar on the left of arch has arch, the left side advance support be made up of advance support ductule (21) on the left of arch, and preliminary bracing (24) of getting out of a predicament or an embarrassing situation on the left of top bar on the left of arch preliminary bracing (22) and arch performs in the advance support of arch, left side;
To get out of a predicament or an embarrassing situation on the right side of (7) and the arch arranged outside of (8) of topping bar on the right side of arch has arch, the right side advance support be made up of advance support ductule (27) on the right side of arch, and preliminary bracing (29) of getting out of a predicament or an embarrassing situation on the right side of top bar on the right side of arch preliminary bracing (28) and arch performs in the advance support of arch, right side.
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| SE543647C2 (en) * | 2014-12-15 | 2021-05-18 | Cn Railway Siyuan Survey & Des | Method for constructing extra-large variable cross section tunnel |
| CN107152283A (en) * | 2017-07-11 | 2017-09-12 | 中交隧道工程局有限公司 | It is a kind of in shallow tunnel weak surrounding rock use cross hang step excavation method |
| CN108506014A (en) * | 2018-04-10 | 2018-09-07 | 中铁第勘察设计院集团有限公司 | The buried station structure and its tunneling engineering method for arch-wall method step excavation of standing after first tunnel |
| CN108952732B (en) * | 2018-08-07 | 2021-03-12 | 中电建路桥集团有限公司 | Excavation construction method suitable for large-section tunnel of water-rich fault fracture zone |
| CN109372518B (en) * | 2018-09-28 | 2020-02-18 | 北京交通大学 | Reverse excavation construction method for tunnel abrupt-change section |
| CN112302664B (en) * | 2020-11-17 | 2023-03-17 | 中冶建工集团有限公司 | Excavation construction method for super-large section shallow-buried surrounding rock double-layer primary support tunnel |
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