CN110439571A - Flat pilot tunnel leads to the adit construction method and transverse passage-way of main tunnel - Google Patents
Flat pilot tunnel leads to the adit construction method and transverse passage-way of main tunnel Download PDFInfo
- Publication number
- CN110439571A CN110439571A CN201910773570.7A CN201910773570A CN110439571A CN 110439571 A CN110439571 A CN 110439571A CN 201910773570 A CN201910773570 A CN 201910773570A CN 110439571 A CN110439571 A CN 110439571A
- Authority
- CN
- China
- Prior art keywords
- way
- tunnel
- transverse passage
- main tunnel
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/008—Driving transverse tunnels starting from existing tunnels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/01—Methods or apparatus for enlarging or restoring the cross-section of tunnels, e.g. by restoring the floor to its original level
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
Abstract
The invention discloses construction methods and transverse passage-way that a kind of flat pilot tunnel leads to the transverse passage-way of main tunnel, the construction method that the flat pilot tunnel leads to the transverse passage-way of main tunnel selects suitable position to open up the initial hole of transverse passage-way Yu flat pilot tunnel infall in flat pilot tunnel first, then the barrel of transverse passage-way is excavated from initial hole to main tunnel direction, in mining process, lead to the direction of main tunnel by flat pilot tunnel in transverse passage-way, the certain gradient uplink of the hole top edge of transverse passage-way is excavated, and then carries out fore shaft construction again.The flat pilot tunnel leads to the construction method of the transverse passage-way of main tunnel by raising of pushing up of transverse passage-way hole to reduce the height difference that transverse passage-way caunches into main tunnel, reduces the difficulty of ripping construction, prevents collapsing of caunching；During ripping construction, by interim door frame with digging with branch, unstability caused by preventing country rock exposure duration too long is collapsed.In addition, opening up transverse passage-way by not excavating hole section from the excavation hole of flat pilot tunnel section to main tunnel, the construction speed of main tunnel can be accelerated.
Description
Technical field
The present invention relates to technical field of tunnel construction, and in particular to a kind of flat pilot tunnel leads to the construction party of the transverse passage-way of main tunnel
Method and transverse passage-way.
Background technique
The flat pilot tunnel in tunnel be common in it is some greatly enhance in Tunnel Engineering, flat pilot tunnel is parallel to the auxiliary construction tunnel of tunnel main tunnel
Hole is typically provided with transverse passage-way between flat pilot tunnel and main tunnel, in tunnel main tunnel work progress, just in case collapse, it can be by flat
Pilot tunnel carries out supporting follow-up, and flat pilot tunnel can be also used for for main tunnel draining, muck removal, charging and ventilation.
In engineering, due to transverse passage-way be in in-cavity construction, flat pilot tunnel enter transverse passage-way opening and transverse passage-way into
The difficulty of construction for entering the opening of main tunnel is larger, and the usually section of flat pilot tunnel and transverse passage-way is more much smaller than the section of main tunnel, puts down
The opening that pilot tunnel enters the opening of transverse passage-way and transverse passage-way enters main tunnel is needed using different constructions, further
Difficulty of construction is improved, and caunching for larger height can be faced in the opening that transverse passage-way enters main tunnel, and height of caunching is bigger
Difficulty of construction is bigger.
The Chinese patent literature of Publication No. CN106089215A describes a kind of parallel pilot tunnel of vcehicular tunnel into transverse passage-way
Opening construction method, by the preliminary bracing structure centre line before and after parallel pilot tunnel and transverse passage-way center line crossover sites to transverse passage-way
Direction offset, and increased top bar steel arch-shelf radius according to design profile, steel arch-shelf radius of getting out of a predicament or an embarrassing situation continues former construction usage
Radius；On the basis of transverse passage-way normal profile steel arch-shelf, angle processing is carried out to each of which arch unit respectively, and in every list
Slip casting lock foot anchor tube is laid at first connecting plate connector and vault respectively.The Chinese patent literature of Publication No. CN104632228A is remembered
It has carried a kind of transverse passage-way and has entered main track construction method and transverse passage-way, be related to constructing metro tunnel field, by following sequential steps group
At: 1. surveying setting-out puts place main track portal position on transverse passage-way side wall；2. installing grid steel frame, In in main track portal position
Grid steel frame internal arch part sets advanced tubule；3. arranging anchor tube and double layer bar on the side wall outside main track portal；4. will
Advanced tubule and anchor tube slip casting, and be welded as a whole with double steel bar mesh sheet；5. gunite concrete forms knee wall.
Above patent document record construction method be transverse passage-way part construction, cannot effectively reduce transverse passage-way into
Enter the construction risk that the height at main tunnel caunches.
Summary of the invention
The technical problem to be solved in the present invention is to provide construction methods and cross that a kind of flat pilot tunnel leads to the transverse passage-way of main tunnel
Channel, solve in the prior art transverse passage-way enter at main tunnel caunching height it is higher, the technology that difficulty of construction is big, risk is big is asked
Topic.
In order to solve the above technical problems, the first aspect of the present invention is:
The construction method that a kind of flat pilot tunnel leads to the transverse passage-way of main tunnel is designed, the profile head of the main tunnel is higher than the flat pilot tunnel
Profile head, the construction method the following steps are included:
(1) transverse passage-way is open: suitable position being selected to open up the initial hole of transverse passage-way Yu flat pilot tunnel infall in flat pilot tunnel；
(2) barrel of the transverse passage-way, mining process adit construction: are excavated from the initial hole to the main tunnel direction
In, lead to the direction of the main tunnel by the flat pilot tunnel in the transverse passage-way, in the certain gradient of the hole top edge of the transverse passage-way
Row excavates；
(3) fore shaft is constructed: when the barrel of the transverse passage-way, which excavates, to be reached with the infall of the main tunnel, the transverse passage-way with
The infall construction fore shaft of the main tunnel, the fore shaft is the reinforcing of the transverse passage-way and the main tunnel infall.
Preferably, the transverse passage-way by the flat pilot tunnel excavated hole section lead to the main tunnel do not excavate hole section, described
After step (3), the construction method further includes the steps that carrying out main tunnel ripping construction (4) at the fore shaft, the step
(4) include:
It along the width direction of the main tunnel, is digged forward from the fore shaft, during digging, with certain at the top of the fore shaft
The gradient is caunched to the top-direction of main tunnel progress uplink and is digged.
Preferably, the step (2) specifically includes:
(2.1) barrel of the transverse passage-way is excavated using benching tunnelling method, and in digging process, supporting size is corresponding in transverse passage-way
Transverse passage-way steelframe, and the hole wall of supporting steelframe lay anchor pole, gunite concrete formed preliminary bracing；
(2.2) while transverse passage-way excavates forward, it is laid with steel mesh, formwork supporting plate in the hole wall that rear forms preliminary bracing, so
Concrete is injected in the template propped afterwards forms secondary lining；
(2.3) during the tunnel cutting of the transverse passage-way, the bottom surface backfill hole excavated out in the transverse passage-way is cut to be formed
Driving road surface, the direction of the main tunnel is led to from the flat pilot tunnel in the transverse passage-way with certain gradient in the driving road surface
It edges up.
Preferably, the step (3) includes:
(3.1) more Pin fore shaft brackets, institute are intensively set up side by side at the cross sidewalls of the transverse passage-way and the main tunnel of design
Stating fore shaft bracket includes internal transverse passage-way fore shaft steelframe and external reinforced door shaped steel frame, and the transverse passage-way fore shaft steelframe has
At the top of arch, at the top of the arch of the crossbeam for reinforcing gate frame roof and the transverse passage-way fore shaft steelframe between setting it is more
A vertical upright column；
(3.2) it is connected integral between fore shaft bracket described in more Pin, and set in the bottom of the fore shaft bracket by welded steel
Crossbeam of stopping over is set as support.
Preferably, the step (4) specifically includes:
(4.1) from the fore shaft to partially being digged on the section of the main tunnel: during digging, being set along the main tunnel
The hole top contour line of meter extends out certain distance for the space as the deflection for offsetting the hole digged top and performs gib
Space, often dig a distance, set up the interim portal frame of corresponding size in time, apply anchor pole on the hole of excavation top and spray
It penetrates concrete and carries out gib, in this way, until being digged from the fore shaft to the other side of the main tunnel width direction；
(4.2) attention hole tunnel arch in the gib undercarriage that main tunnel top is excavated: the main tunnel tunnel arch is close to described
The part of fore shaft side is the cant beam that the direction Dong Ding excavated from the top of the fore shaft to the main tunnel extends, the positive hole tunnel
The rest part of arch is the arch portion on the hole top that the fitting main tunnel is excavated, and the lower end of the cant beam is welded on the fore shaft branch
On the crossbeam of top of the trellis；
(4.3) top for digging space to the upper part of the main tunnel carries out combined bolting and shotcrete: the two of the main tunnel tunnel arch
Lateral hole top wall surface squeezes into lock foot anchor tube, and hangs reinforced mesh on the main tunnel tunnel arch, then to the main tunnel tunnel
Road arch and reinforced mesh gunite concrete.
Preferably, the driving road surface extends to the main tunnel top by the bottom surface at the initial hole and excavates space bottom surface
Midline.
It preferably, further include being located in front of the fore shaft to continue to dig to the main tunnel after the step (4.3)
Step (5), the step (5) include:
(5.1) after the intensity of the concrete sprayed on the main tunnel tunnel arch and reinforced mesh reaches requirement, face described
When portal frame stabilizer blade remove；
(5.2) use three benching tunnelling methods to institute on the basis of the space that the top of the main tunnel and the transverse passage-way infall is excavated
It states front and back extending direction inside main tunnel to be excavated, the hole of the main tunnel and transverse passage-way infall section is made to form tunneling boring hole
Section is gradually removed in digging process and forms the hole quarrel that the driving road surface is backfilled in the transverse passage-way；
(5.3) the section carry out inverted arch space of the hole in front of fore shaft excavation is located to the main tunnel, after excavating out inverted arch space,
Inverted arch frame is set up in the inverted arch space and is laid with reinforced mesh, and then casting concrete forms inverted arch just branch sheath.
Preferably, the step (1) specifically includes:
(1.1) go out transverse passage-way opening excavation contour line in the side measurement markers of flat pilot tunnel, the excavation contour line inner space
For the initial hole of transverse passage-way, certain distance is extended out along excavation contour line and performs advanced tubule, advanced tubule is with certain
Gradient uplink is set, and is welded to connect advanced tubule with the flat pilot tunnel steelframe to intersect using reinforcing bar；
(1.2) after the completion of advanced tubule performs, the coagulation being located in the excavation contour line on the flat pilot tunnel side wall is cut
Native branch sheath, and the flat pilot tunnel steelframe part in the excavation contour line is cut away, then using fashioned iron along the outline excavation
Steelframe notch is welded to connect by line.
The second aspect of the present invention are as follows:
The transverse passage-way that a kind of flat pilot tunnel leads to main tunnel is designed, the profile head of the main tunnel is higher than the section top of the flat pilot tunnel
Portion, the transverse passage-way include intersect positioned at the transverse passage-way and the flat the pilot tunnel initial hole at place, transverse passage-way barrel, and
It intersects the fore shaft at place positioned at the transverse passage-way and the main tunnel, is equipped with initial hole supporting steelframe around the initial hole,
Be equipped with fore shaft supporting steelframe at the fore shaft, the hole of the transverse passage-way push up since the initial hole top to the main tunnel
The top of infall edges up along certain gradient.
Preferably, the transverse passage-way further includes being transitioned into caunching at the top of the main tunnel by the fore shaft top, described to choose
Top includes caunching supporting steelframe, the supporting steelframe that caunches include it is multiple from the top of the fore shaft to extending at the top of the main tunnel
Cant beam, the fore shaft supporting steelframe include the intensive gate supporting steelframe arranged side by side of more Pin, and the top of the door shape supporting steelframe is
Crossbeam, one end of the cant beam are fixed on the cross rail top, and the other end is connected with arch corresponding with the hole of main tunnel top,
The end of the arch extends to the opposite side that the main tunnel is located at the fore shaft, the end of the cant beam and arch to it is described just
Lock foot anchor tube has been squeezed into the wall surface in hole.
The beneficial technical effect of the present invention lies in:
1. flat pilot tunnel provided by the invention leads to the construction method of the transverse passage-way of main tunnel by raising of pushing up of transverse passage-way hole to reduce
The height difference that transverse passage-way caunches into main tunnel reduces the difficulty of ripping construction, prevents collapsing of caunching.
2., by interim door frame with digging with branch, being lost caused by preventing country rock exposure duration too long during ripping construction
It is steady to collapse.
3. the present invention does not excavate hole section from the excavation hole of flat pilot tunnel section to main tunnel and opens up transverse passage-way, applying for main tunnel can be accelerated
Work progress.
4. strengthening supporting at the initial hole of transverse passage-way and fore shaft enhances the stability being easy at the hole of unstability.
Detailed description of the invention
Fig. 1 is the plan view that one embodiment of the invention increases transverse passage-way newly between main tunnel and flat pilot tunnel；
Fig. 2 is the flow chart of the construction method for the transverse passage-way that the flat pilot tunnel of one embodiment of the invention leads to main tunnel；
Fig. 3 is the structural schematic diagram of arch at the initial hole of one embodiment of the invention transverse passage-way；
The arch layout diagram of Fig. 4 transverse passage-way between one embodiment of the invention main tunnel and flat pilot tunnel；
Fig. 5 is the sectional schematic diagram that one embodiment of the invention increases transverse passage-way newly between main tunnel and flat pilot tunnel；
Fig. 6 is the structural schematic diagram for the fore shaft bracket that one embodiment of the invention is arranged at fore shaft.
In figure, the signal of each label are as follows: main tunnel 11, the 111, step surface 112 that caunches, interim portal frame 113, step surface 114,
Cant beam 115, inverted arch excavation face 117, main tunnel side gutter 118, gutter 119 in main tunnel, flat pilot tunnel 12, flat is led at arch portion 116
Hole supporting steelframe 121, flat pilot tunnel gutter 122, transverse passage-way 13, initial hole 131, initial hole arch 1311, barrel 132,
Elevation line 1324, fore shaft bracket 1325, transverse passage-way fore shaft steelframe are pushed up in three Pin arch 1321 arranged side by side, middle part arch 1322, initial hole
1325-1, reinforced door shaped steel frame 1325-2, crossbeam 1325-3, transverse passage-way bottom surface 133, driving road surface 134, fore shaft 135, transverse passage-way
Gutter 136.
Specific embodiment
Illustrate a specific embodiment of the invention with reference to the accompanying drawings and examples, but following embodiment is used only in detail
It describes the bright present invention in detail, does not limit the scope of the invention in any way.
Embodiment 1:
A kind of flat pilot tunnel leads to the construction method of the transverse passage-way of main tunnel, also referring to Fig. 1 to Fig. 6.
As shown in Figure 1, in the construction method for the transverse passage-way that flat pilot tunnel provided in an embodiment of the present invention leads to main tunnel, main tunnel 11
Section be greater than flat pilot tunnel 12 section, flat pilot tunnel 12 is parallel with main tunnel 11, and main tunnel 11 is for building highway or railway
Tunnel, flat pilot tunnel 12 are the tunnels for assisting main tunnel 11 to construct.
In the present embodiment, location locating for the peaceful pilot tunnel 12 of main tunnel 11 is located at Southwestern China somewhere, the peaceful pilot tunnel of main tunnel 11
The rock mass in location locating for 12 is V grades of country rocks, and rock stability is poor, and wall-rock crack water is relatively developed, and construction operating condition is extremely complex.It is based on
Location geology locating for the peaceful pilot tunnel 12 of main tunnel 11 is severe, and the excavation of the peaceful pilot tunnel 12 of main tunnel 11 mainly uses TBM+ drilling and blasting method to combine
Construction.
Since flat 12 section of pilot tunnel is small, a rate of advance is relatively fast, and the excavation progress of flat pilot tunnel 12 leads over main tunnel 11, is
The construction speed for accelerating main tunnel 11 has been excavated hole section and has been added and led to main tunnel 11 and do not excavate the horizontal logical of hole section in flat 12 front of pilot tunnel
Road 13, by transverse passage-way 13 can enter 11 front design route of main tunnel on do not excavate hole section construct, to accelerate main tunnel 11
Speed of application.
13 section of transverse passage-way increased newly in Fig. 1 is 5.48m × 6.14m(wide × height), excavated section is 39 ㎡；Main tunnel 11 is disconnected
Face is having a size of 16.42m × 11.94m(wide × height), excavated section is 180 ㎡, and transverse passage-way 13 caunches with 11 place of intersecting of main tunnel
Highly larger, difficulty of construction is very big, and the first purpose of construction method of the present invention is exactly to reduce transverse passage-way 13 to intersect with main tunnel 11
The difficulty of construction caunched at place.
As shown in Fig. 2, the construction method for the transverse passage-way that flat pilot tunnel provided in an embodiment of the present invention leads to main tunnel includes following
Step:
Step S10, transverse passage-way is open: suitable position being selected to open up the initial of transverse passage-way and flat pilot tunnel infall in flat pilot tunnel
Hole.
Firstly, going out transverse passage-way opening excavation contour line close to the side measurement markers of main tunnel 11 in flat pilot tunnel 12, this is opened
The initial hole 131 that contour line inner space is transverse passage-way 13 in Fig. 1 is dug, 30cm is extended out along excavation contour line and performs small in advance lead
Pipe, advanced tubule sets with 20% gradient uplink, and using L shape reinforcing bar by advanced tubule and the flat pilot tunnel 12 that intersects
Steelframe on the wall of hole is welded to connect, and prevents advanced tubule from loosening.
By advanced tubule slip casting into the country rock around excavation contour line, to enhance the stability of country rock.Here, surpass
Preceding ductule with the purpose that 20% gradient uplink is set is prepared for the hole top edge certain slope arrival main tunnel of transverse passage-way 13.
As shown in figure 3, cutting after the completion of advanced tubule performs and being located at mixing in excavation contour line on flat 12 side wall of pilot tunnel
Solidifying soil branch sheath, and the part that flat pilot tunnel supporting steelframe 121 is located in excavation contour line is cut away, then use I14 fashioned iron edge
Steelframe notch be welded to connect by excavation contour line forms initial hole arch 1311, and to initial hole arch 1311 and digs
Scar spray concrete covering out.
Here I14 fashioned iron is No. 14 I-steel, and flat pilot tunnel supporting steelframe 121 is and arch adaptable at the top of flat pilot tunnel 12
Frame.Above-mentioned advanced tubule and initial hole arch 1311 play support action to the country rock around initial hole 131 jointly.
Step S20, the barrel of transverse passage-way, in mining process, In adit construction: are excavated from initial hole to main tunnel direction
Transverse passage-way is led to the direction of main tunnel by flat pilot tunnel, and the certain gradient uplink of the hole top edge of transverse passage-way is excavated.
In the step, firstly, the barrel 132 to transverse passage-way 13 in Fig. 1 is excavated using rank method, benching tunnelling method here is
The common construction method of tunneling in V grades of country rocks, is divided into upper half section and lower half for the design section of transverse passage-way 13
Section, the certain distance that is staggered first excavate upper half section, excavate lower half section, upper and lower half section again after being excavated to certain length
In different working faces while tunneling construction.Benching tunnelling method construction increases working face, is conducive to accelerate construction progress, and once open
It is smaller to dig area, is conducive to face and stablizes.
Along with the excavation of horizontal trunk, need to carry out supporting, the supporting parameter of transverse passage-way 13 such as table 1 to the hole wall of transverse passage-way
Shown, the supporting of transverse passage-way 13 is divided into preliminary bracing and later period moulded lining supporting.
In digging process, the corresponding transverse passage-way steelframe of supporting size in transverse passage-way 13, and in the hole wall cloth of supporting steelframe
If system anchor bolt and lock foot anchoring stock, then gunite concrete forms preliminary bracing, transverse passage-way steelframe, system anchor bolt, lock foot anchoring stock
It is as shown in table 1 with the construction parameter of gunite concrete.
Here transverse passage-way steelframe is arch corresponding with the section of transverse passage-way made of I14 fashioned iron, as shown in figure 4, this
A little arches include three Pin arch 1321 arranged side by side, the fore shaft bracket at 132 end of barrel being arranged at initial hole 131
1325 and remaining middle part arch 1322,1 meter adjacent of 1322 spacing of middle part arch.
The effect of system anchor bolt is to guarantee the stabilization of transverse passage-way hole wall country rock, and the effect of lock foot anchoring stock is prevented under arch
Heavy, two lock foot anchoring stocks, lock foot anchoring stock and arch are squeezed into every Pin arch two sides stabilizer blade lower part in transverse passage-way into hole wall respectively
The stabilizer blade of frame welds, and therefore, every Pin arch is correspondingly provided with four lock foot anchoring stocks.
Table 1 increases transverse passage-way supporting parameter table
。
While transverse passage-way 13 excavates forward, it is laid with steel mesh, formwork supporting plate in the hole wall that rear forms preliminary bracing, so
Concrete is injected in the template propped afterwards and forms secondary lining, the parameter of secondary lining referring to the moulded lining in table 1 this
Column.
As shown in figure 4, the side at initial hole 131 extends out one relative to the tunnel middle line of transverse passage-way 13 for convenient for driving
Then set a distance is excavated with 75 degree of angle to tunnel midline, until constriction to the design section with the main hole of transverse passage-way 13 section
The identical position of size.
As shown in figure 5, the gradient uplink of the 132 hole top edge 20% of barrel of transverse passage-way 13 is excavated until horizontal logical in the present embodiment
Road 13 and 11 intersection location of main tunnel, in this way, transverse passage-way 13 and 11 intersection location of main tunnel raise number than initial hole top elevation line 1324
Rice (about 3.28 meters are raised in the present embodiment), initial hole top elevation line 1324 indicate the hole top at the initial hole 131 of transverse passage-way 13
Absolute altitude.
By excavating the gradient uplink of the 132 hole top edge 20% of barrel of transverse passage-way 13, transverse passage-way 13 and main tunnel 11 are reduced
Hole rise difference, create favorable conditions for later period ripping construction, reduce ripping construction difficulty.
In addition, as shown in figure 5, pushing up during the tunnel cutting of transverse passage-way 13 in the hole of transverse passage-way 13 with 20% gradient
While uplink is excavated, transverse passage-way bottom surface 133 is excavated with designed elevation, the transverse passage-way bottom surface excavated out in transverse passage-way 13
133 backfill holes are cut to form driving road surface 134, and the direction of main tunnel 11 is led on driving road surface 134 in transverse passage-way 13 from flat pilot tunnel 12
It is edged up with 18% gradient.Being laid with inclined driving road surface 134 is excavate to main tunnel 11 for the later period preparing, and facilitates the later period
The intersect top of hole section of main tunnel 11 and transverse passage-way 12 is excavated.
Step S30, fore shaft is constructed: when the barrel of transverse passage-way, which excavates, reaches the infall with main tunnel, in transverse passage-way and just
The infall construction fore shaft in hole, fore shaft is the hole of transverse passage-way and main tunnel infall.
As shown in Figure 1 and Figure 5, since fore shaft 135 is located at 11 infall of transverse passage-way 13 and main tunnel, and the section of main tunnel 11 compared with
Greatly, therefore, the 135 front later period of fore shaft needs to excavate bigger space, and fore shaft 135 needs to carry out strengthening supporting.
For this purpose, as shown in Figure 4 and Figure 5, three Pin fore shafts are set up at the cross sidewalls of transverse passage-way 13 and the main tunnel 11 of design
Bracket 1325, fore shaft bracket 1325 are made of I14 fashioned iron, are welded between three Pin fore shaft brackets 1325 by I14 fashioned iron, make to lock
Mouth bracket 1325 becomes whole.
As shown in fig. 6, fore shaft bracket 1325 includes internal transverse passage-way fore shaft steelframe 1325-1 and external reinforcement gate
Steelframe 1325-2, transverse passage-way fore shaft steelframe 1325-1 have at the top of arch, are reinforcing the crossbeam at the top of gate frame 1325-2
Multiple vertical upright column 1325-4 are set between at the top of the arch of 1325-3 and transverse passage-way fore shaft steelframe 1325-1, make fore shaft bracket
1325 have stronger load-bearing capacity.
1325 later period of fore shaft bracket needs to carry the cant beam 115 of the place's of caunching setting, therefore, when fore shaft bracket 1325 is in fore shaft
After place installs, in the bottom of fore shaft bracket 1325, setting stops over crossbeam as support, and crossbeam of stopping over is common with lock foot anchoring stock
Prevent fore shaft bracket 1325 from sinking.
After step S30, construction method of the present invention include thes steps that carrying out main tunnel ripping construction S40 at fore shaft.
Step S40, it along the width direction of main tunnel, is digged forward from fore shaft, during digging, with certain at the top of fore shaft
The gradient is caunched to the top-direction of main tunnel progress uplink and is digged.
To partially being digged on the section of main tunnel 11 first from fore shaft 135, specifically, as shown in figure 5, first to main tunnel
The part of 112 or more step surface is digged in 11, and the section that main tunnel 11 digs here refers to that main tunnel 11 excavates not having for formation
The cross section of the hole body of supporting, there are also a Duan Gaodu for internal rail top surface 114 of the step surface 112 apart from main tunnel 11, first in main tunnel 11
The part of 112 or more step surface is digged, and is equivalent to and is excavated the part that main tunnel 11 is located at 135 front of fore shaft using benching tunnelling method,
On the one hand convenient for being transitioned into the 111 carry out supportings of caunching of main tunnel 11 to fore shaft 135, on the other hand convenient for being excavated out to main tunnel 11
Hole top carries out supporting.
During digging, along the hole that main tunnel 11 designs top, contour line extends out hole of the certain distance for digging as counteracting
The space of the deflection on top and the space for performing gib, deflection here refer to country rock deflection, by reserved certain
Space, when country rock occurs to sink and after perform supporting, the section size of the clear space of the tunnel of formation and it is intrinsic just
The headroom discontinuity surface sizableness in hole.
As shown in figure 5, often digging a distance, the interim portal frame 113 of corresponding size, interim gate-type steel are set up in time
Frame 113 is made of I20B I-steel, and the stabilizer blade lower end of interim 113 two sides of portal frame is supported on step surface 112, and top is along axis
It pushes up in the hole excavated out to support main tunnel 11.Anchor pole is applied on the hole of excavation top and gunite concrete carries out gib, in this way, directly
To being digged from fore shaft 135 to the other side of main tunnel width direction.
After the excavation of earthwork of 112 or more step surface, attention hole tunnel in the part hole upper frame that 11 top of main tunnel is excavated
Road arch, main tunnel tunnel arch are the direction Dong Ding excavated from the top of fore shaft 135 to main tunnel close to the part of 135 side of fore shaft
The cant beam 115 of extension, the rest part of main tunnel tunnel arch are the arch portion 116 for being bonded the hole top that main tunnel is excavated, cant beam 115
Lower end is welded on the upper surface crossbeam 1325-3 at 1325 top of fore shaft bracket, and 115 bottom of cant beam and crossbeam 1325, which use, is fully welded weldering
It connects securely.Arch portion 116 is rolled using reinforcing bar in main tunnel tunnel arch, and I-steel, the top of cant beam 115 can be used in cant beam 115
It is fixed on the corresponding end point of arch portion 116.Main tunnel tunnel arch has multiple, is paved with until by the hole of excavation top.
Then to the upper part of main tunnel 11 dig space top carry out combined bolting and shotcrete: the both ends of main tunnel tunnel arch to
Hole top wall surface squeezes into lock foot anchor tube, that is, in the lock that the lower end of cant beam 115 squeezes into two diameter 22mm into hole wall, length is 4 meters
Then 115 lower end of cant beam is welded on the lock foot anchoring stock by foot anchor pole, also squeeze into two into hole wall in the end of arch portion 116
The end of arch portion 116, is then welded on the lock foot anchoring stock, prevents just by root diameter 22mm, the lock foot anchoring stock that length is 4 meters
Hole tunnel arch sinks.
Reinforced mesh is hung on main tunnel tunnel arch, then to main tunnel tunnel arch and reinforced mesh gunite concrete shape
At secondary gib.
During the excavation of earthwork to 112 or more step surface, driving road surface 134 is extended by the bottom surface at initial hole 131
The midline that space step surface 112 is excavated to 11 top of main tunnel, in order to which the mechanical equipment of excavation facilitates operation, and is readily transported
The body refuse dug out.
After the step s 40, construction method of the present invention further includes step S50.
Step S50, main tunnel is located in front of fore shaft and continues to dig.
Here main tunnel is located in front of fore shaft to continue to dig and refers to and digs the part below of step surface 112.
After the intensity of the concrete sprayed on main tunnel tunnel arch and reinforced mesh reaches requirement, by interim portal frame
113 stabilizer blade is removed, and the mode that cutting can be used removes stabilizer blade, to reduce the disturbance protected to hole topmast.
Three benching tunnelling methods are used on the basis of the space that the top of main tunnel 11 and 13 infall step surface 112 of transverse passage-way is excavated
The front and back extending direction of main tunnel 11 axially inside is excavated, forms the hole of main tunnel 11 and 13 infall of transverse passage-way section complete
Section tunnel section, and in digging process, it gradually removes and forms the hole quarrel that driving road surface 134 is backfilled in transverse passage-way 13, make horizontal logical
Expose road bottom surface 133.
Then it is located at the hole section carry out inverted arch space excavation in the front of fore shaft 135 to main tunnel 11, inverted arch space, which is excavated, to be referred to pair
The earthwork of 117 or more inverted arch excavation face is digged, and after excavating out inverted arch space, inverted arch frame and paving are set up in inverted arch space
If reinforced mesh, then casting concrete forms inverted arch just branch sheath 1171.Later period also need to performed in hole two lining inverted arch with
And hole wall moulded lining.
In above-mentioned work progress, while performing main tunnel side gutter 118, gutter 119 and transverse passage-way row in main tunnel
Ditch 136, the main tunnel side gutter 118 of two sides are communicated to gutter 119 in intermediate main tunnel, and transverse passage-way gutter 136
Both ends are respectively communicated with the peaceful pilot tunnel in gutter 119 gutter 122 in main tunnel.
Embodiment 2:
A kind of flat pilot tunnel leads to the transverse passage-way of main tunnel, please refers to Fig. 5 and Fig. 6.
The transverse passage-way that the flat pilot tunnel of the embodiment of the present invention leads to main tunnel uses the construction method of embodiment 1, the transverse passage-way 13 packet
It includes and is located at transverse passage-way 13 and flat pilot tunnel 12 and intersects the initial hole 131 at place, barrel 132, and be located at transverse passage-way 13 and main tunnel
11 fore shafts 135 for intersecting place are equipped with initial hole supporting steelframe around initial hole 131, are equipped with fore shaft supporting at fore shaft 135
Steelframe, the hole top of transverse passage-way 13 at the top of the initial hole 131 to the top with 11 infall of main tunnel along 20% the gradient gradually
It rises.
Further, transverse passage-way 13 further includes caunching 111 by be transitioned into the top of main tunnel 11 at the top of fore shaft 135, caunches 111
Including the supporting steelframe that caunches, the supporting steelframe that caunches include it is multiple from the top of fore shaft 135 to main tunnel 11 at the top of the cant beam 115 that extends,
Fore shaft supporting steelframe is made of side by side 3 Pin gate supporting steelframe shown in fig. 6, and welds fashioned iron between door shape supporting steelframe,
So that fore shaft Support Steel is put up as entirety.The top of door shape supporting steelframe is crossbeam 1325-3, and the lower end of cant beam 115 is fixed on cross
At the top of beam 1325-3, the other end is connected with arch portion 116 corresponding with the hole of main tunnel top, and arch portion is the main tunnel arch that a Pin is completed
A part of frame, the end of arch portion 116 extends to the opposite side that main tunnel 11 is located at fore shaft 135, in cant beam 115 and arch portion 116
End squeezed into lock foot anchor tube into the wall surface of main tunnel 11 and to support cant beam 115 and arch portion 116 prevent its sinking.
The present invention is described in detail above in conjunction with drawings and examples, still, those of skill in the art
Member is it is understood that without departing from the purpose of the present invention, can also carry out each design parameter in above-described embodiment
Change, forms multiple specific embodiments, is common variation range of the invention, is no longer described in detail one by one herein.
Claims (10)
1. a kind of flat pilot tunnel leads to the construction method of the transverse passage-way of main tunnel, the profile head of the main tunnel is higher than the flat pilot tunnel
Profile head, which is characterized in that the construction method the following steps are included:
(1) transverse passage-way is open: suitable position being selected to open up the initial hole of transverse passage-way Yu flat pilot tunnel infall in flat pilot tunnel；
(2) barrel of the transverse passage-way, mining process adit construction: are excavated from the initial hole to the main tunnel direction
In, lead to the direction of the main tunnel by the flat pilot tunnel in the transverse passage-way, in the certain gradient of the hole top edge of the transverse passage-way
Row excavates；
(3) fore shaft is constructed: when the barrel of the transverse passage-way, which excavates, to be reached with the infall of the main tunnel, the transverse passage-way with
The infall construction fore shaft of the main tunnel, the fore shaft is the reinforcing of the transverse passage-way and the main tunnel infall.
2. the construction method that flat pilot tunnel according to claim 1 leads to the transverse passage-way of main tunnel, which is characterized in that described horizontal logical
Road by the flat pilot tunnel excavated hole section lead to the main tunnel do not excavate hole section, after the step (3), the construction method
Further include the steps that carrying out main tunnel ripping construction (4) at the fore shaft, the step (4) includes:
Along the width direction of the transverse passage-way, from it is described it is flat lead fore shaft and dig forward, during digging, at the top of the fore shaft with
Certain gradient is caunched to the top-direction of main tunnel progress uplink and is digged.
3. the construction method that flat pilot tunnel according to claim 2 leads to the transverse passage-way of main tunnel, which is characterized in that the step
(2) it specifically includes:
(2.1) barrel of the transverse passage-way is excavated using benching tunnelling method, and in digging process, supporting size is corresponding in transverse passage-way
Transverse passage-way steelframe, and the hole wall of supporting steelframe lay anchor pole, gunite concrete formed preliminary bracing；
(2.2) while transverse passage-way excavates forward, it is laid with steel mesh, formwork supporting plate in the hole wall that rear forms preliminary bracing, so
Concrete is injected in the template propped afterwards forms secondary lining；
(2.3) it during the tunnel cutting of the transverse passage-way, to reduce height difference difficulty of caunching, is excavated out in the transverse passage-way
Bottom surface backfill hole be cut to be formed driving road surface, the main tunnel is led to from the flat pilot tunnel in the transverse passage-way in the driving road surface
Direction edged up with certain gradient.
4. the construction method that flat pilot tunnel according to claim 3 leads to the transverse passage-way of main tunnel, which is characterized in that the step
(3) include:
(3.1) more Pin fore shaft brackets, institute are intensively set up side by side at the cross sidewalls of the transverse passage-way and the main tunnel of design
Stating fore shaft bracket includes internal transverse passage-way fore shaft steelframe and external reinforced door shaped steel frame, and the transverse passage-way fore shaft steelframe has
At the top of arch, at the top of the arch of the crossbeam for reinforcing gate frame roof and the transverse passage-way fore shaft steelframe between setting it is more
A vertical upright column；
(3.2) it is connected integral between fore shaft bracket described in more Pin, and set in the bottom of the fore shaft bracket by welded steel
Crossbeam of stopping over is set as support.
5. the construction method that flat pilot tunnel according to claim 4 leads to the transverse passage-way of main tunnel, which is characterized in that the step
(4) it specifically includes:
(4.1) from the fore shaft to partially being digged on the section of the main tunnel: during digging, being set along the main tunnel
The hole top contour line of meter extends out certain distance for the space as the deflection for offsetting the hole digged top and performs gib
Space, often dig a distance, set up the interim portal frame of corresponding size in time, apply anchor pole on the hole of excavation top and spray
It penetrates concrete and carries out gib, in this way, until being digged from the fore shaft to the other side of the main tunnel width direction；
(4.2) attention hole tunnel arch in the gib undercarriage that main tunnel top is excavated: the main tunnel tunnel arch is close to described
The part of fore shaft side is the cant beam that the direction Dong Ding excavated from the top of the fore shaft to the main tunnel extends, the positive hole tunnel
The rest part of arch is the arch portion on the hole top that the fitting main tunnel is excavated, and the lower end of the cant beam is welded on the fore shaft branch
On the crossbeam of top of the trellis；
(4.3) top for digging space to the upper part of the main tunnel carries out combined bolting and shotcrete: the two of the main tunnel tunnel arch
Lateral hole top wall surface squeezes into lock foot anchor tube, and hangs reinforced mesh on the main tunnel tunnel arch, then to the main tunnel tunnel
Road arch and reinforced mesh gunite concrete.
6. the construction method that flat pilot tunnel according to claim 5 leads to the transverse passage-way of main tunnel, which is characterized in that the driving
Road surface is extended to the midline that space bottom surface is excavated on the main tunnel top by the bottom surface at the initial hole.
7. the construction method that flat pilot tunnel according to claim 5 leads to the transverse passage-way of main tunnel, which is characterized in that in the step
Suddenly after (4.3), further include the steps that being located at the main tunnel in front of the fore shaft and continue to dig (5), step (5) packet
It includes:
(5.1) after the intensity of the concrete sprayed on the main tunnel tunnel arch and reinforced mesh reaches requirement, face described
When portal frame stabilizer blade remove；
(5.2) use three benching tunnelling methods to institute on the basis of the space that the top of the main tunnel and the transverse passage-way infall is excavated
It states front and back extending direction inside main tunnel to be excavated, the hole of the main tunnel and transverse passage-way infall section is made to form tunneling boring hole
Section is gradually removed in digging process and forms the hole quarrel that the driving road surface is backfilled in the transverse passage-way；
(5.3) the section carry out inverted arch space of the hole in front of fore shaft excavation is located to the main tunnel, after excavating out inverted arch space,
Inverted arch frame is set up in the inverted arch space and is laid with reinforced mesh, and then casting concrete forms supporting closing cyclization.
8. the construction method that flat pilot tunnel according to claim 2 leads to the transverse passage-way of main tunnel, which is characterized in that the step
(1) it specifically includes:
(1.1) go out transverse passage-way opening excavation contour line in the side measurement markers of flat pilot tunnel, the excavation contour line inner space
For the initial hole of transverse passage-way, certain distance is extended out along excavation contour line and performs advanced tubule, advanced tubule is with certain
Gradient uplink is set, and is welded to connect advanced tubule with the flat pilot tunnel steelframe to intersect using reinforcing bar；
(1.2) after the completion of advanced tubule performs, the coagulation being located in the excavation contour line on the flat pilot tunnel side wall is cut
Native branch sheath, and the flat pilot tunnel steelframe part in the excavation contour line is cut away, then using fashioned iron along the outline excavation
Steelframe notch is welded to connect by line.
9. a kind of flat pilot tunnel leads to the transverse passage-way of main tunnel, the profile head of the main tunnel is higher than the profile head of the flat pilot tunnel,
The transverse passage-way includes intersect positioned at the transverse passage-way and the flat the pilot tunnel initial hole at place, transverse passage-way barrel, Yi Jiwei
It intersects the fore shaft at place in the transverse passage-way and the main tunnel, is equipped with initial hole supporting steelframe, institute around the initial hole
State and be equipped with fore shaft supporting steelframe at fore shaft, which is characterized in that the hole of the transverse passage-way push up since the initial hole top to
It edges up with the top of the main tunnel infall along certain gradient.
10. the transverse passage-way that flat pilot tunnel according to claim 9 leads to main tunnel, which is characterized in that the transverse passage-way further includes
It is described to caunch including the supporting steelframe that caunches, the supporting of caunching by being transitioned into caunching at the top of the main tunnel at the top of the fore shaft
Steelframe includes multiple from the fore shaft top to the cant beam of extension at the top of the main tunnel, and the fore shaft supporting steelframe includes more Pin close
Collect gate supporting steelframe arranged side by side, the top of the door shape supporting steelframe is crossbeam, and one end of the cant beam is fixed on the cross
Back portion, the other end are connected with arch corresponding with the hole of main tunnel top, and the end of the arch extends to the main tunnel position
In the opposite side of the fore shaft, lock foot anchor tube has been squeezed into the wall surface of the main tunnel in the end of the cant beam and arch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910773570.7A CN110439571B (en) | 2019-08-21 | 2019-08-21 | Transverse channel construction method for leading flat pilot tunnel to main tunnel and transverse channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910773570.7A CN110439571B (en) | 2019-08-21 | 2019-08-21 | Transverse channel construction method for leading flat pilot tunnel to main tunnel and transverse channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110439571A true CN110439571A (en) | 2019-11-12 |
| CN110439571B CN110439571B (en) | 2021-02-23 |
Family
ID=68436869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910773570.7A Active CN110439571B (en) | 2019-08-21 | 2019-08-21 | Transverse channel construction method for leading flat pilot tunnel to main tunnel and transverse channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110439571B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577383A (en) * | 2020-05-11 | 2020-08-25 | 中铁一局集团有限公司 | Method for treating tunnel leakage water in alpine region |
| CN112431606A (en) * | 2021-01-04 | 2021-03-02 | 中国建筑土木建设有限公司 | Construction method of large-section T-shaped cross tunnel hole group |
| CN112502777A (en) * | 2020-12-08 | 2021-03-16 | 中铁隧道局集团有限公司 | Method for treating tunnel inrush roof fall and door closing |
| CN113944479A (en) * | 2021-10-13 | 2022-01-18 | 中国水利水电第七工程局有限公司 | Unfavorable geological tunnel three-fork construction method |
| CN114135315A (en) * | 2021-11-22 | 2022-03-04 | 中铁十六局集团第三工程有限公司 | Advanced stress release construction method for severe large-deformation tunnel |
| CN116816362A (en) * | 2023-08-31 | 2023-09-29 | 北京交通大学 | Supporting and reinforcing method for intersection of positive tunnel and transverse channel of ultra-large buried soft rock tunnel |
| CN117189160A (en) * | 2023-11-07 | 2023-12-08 | 北京交通大学 | Reasonable setting method for construction transverse channel of ultra-large buried soft rock tunnel |
| BE1030631B1 (en) * | 2022-06-15 | 2024-01-22 | Xiamen Construction Eng Of China Railway First Group | Roof crack construction method for transferring a cross channel to a main borehole for a tunnel in soft rock |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089215A (en) * | 2016-06-23 | 2016-11-09 | 中铁十二局集团有限公司 | The parallel pilot tunnel of vcehicular tunnel enters transverse passage-way opening construction method |
| KR20170087786A (en) * | 2016-01-21 | 2017-07-31 | 이평우 | Reinforcement method of Tunnel |
| CN206972263U (en) * | 2017-05-18 | 2018-02-06 | 中交四公局第三工程有限公司 | The anti-collapse device in the horizontal hole in tunnel |
| CN108756897A (en) * | 2018-05-29 | 2018-11-06 | 中铁十四局集团第二工程有限公司 | A kind of construction method of breaking surrounding rock people's air defense tunnel cross point |
-
2019
- 2019-08-21 CN CN201910773570.7A patent/CN110439571B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170087786A (en) * | 2016-01-21 | 2017-07-31 | 이평우 | Reinforcement method of Tunnel |
| CN106089215A (en) * | 2016-06-23 | 2016-11-09 | 中铁十二局集团有限公司 | The parallel pilot tunnel of vcehicular tunnel enters transverse passage-way opening construction method |
| CN206972263U (en) * | 2017-05-18 | 2018-02-06 | 中交四公局第三工程有限公司 | The anti-collapse device in the horizontal hole in tunnel |
| CN108756897A (en) * | 2018-05-29 | 2018-11-06 | 中铁十四局集团第二工程有限公司 | A kind of construction method of breaking surrounding rock people's air defense tunnel cross point |
Non-Patent Citations (1)
| Title |
|---|
| 胡春停等: "三联隧道软弱围岩条件下横洞与正洞交岔段施工技术", 《隧道建设》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577383A (en) * | 2020-05-11 | 2020-08-25 | 中铁一局集团有限公司 | Method for treating tunnel leakage water in alpine region |
| CN111577383B (en) * | 2020-05-11 | 2021-04-09 | 中铁一局集团有限公司 | Method for treating tunnel leakage water in alpine region |
| CN112502777A (en) * | 2020-12-08 | 2021-03-16 | 中铁隧道局集团有限公司 | Method for treating tunnel inrush roof fall and door closing |
| CN112431606A (en) * | 2021-01-04 | 2021-03-02 | 中国建筑土木建设有限公司 | Construction method of large-section T-shaped cross tunnel hole group |
| CN113944479A (en) * | 2021-10-13 | 2022-01-18 | 中国水利水电第七工程局有限公司 | Unfavorable geological tunnel three-fork construction method |
| CN113944479B (en) * | 2021-10-13 | 2023-07-25 | 中国水利水电第七工程局有限公司 | Poor geological tunnel three-fork construction method |
| CN114135315A (en) * | 2021-11-22 | 2022-03-04 | 中铁十六局集团第三工程有限公司 | Advanced stress release construction method for severe large-deformation tunnel |
| BE1030631B1 (en) * | 2022-06-15 | 2024-01-22 | Xiamen Construction Eng Of China Railway First Group | Roof crack construction method for transferring a cross channel to a main borehole for a tunnel in soft rock |
| CN116816362A (en) * | 2023-08-31 | 2023-09-29 | 北京交通大学 | Supporting and reinforcing method for intersection of positive tunnel and transverse channel of ultra-large buried soft rock tunnel |
| CN116816362B (en) * | 2023-08-31 | 2023-10-31 | 北京交通大学 | Supporting and reinforcing method for intersection of positive tunnel and transverse channel of ultra-large buried soft rock tunnel |
| CN117189160A (en) * | 2023-11-07 | 2023-12-08 | 北京交通大学 | Reasonable setting method for construction transverse channel of ultra-large buried soft rock tunnel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110439571B (en) | 2021-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110439571A (en) | Flat pilot tunnel leads to the adit construction method and transverse passage-way of main tunnel | |
| CN104612698B (en) | A kind of shallow-depth-excavation tunnel top bar interval wall construction method | |
| CN108194102B (en) | The dismounting of limit section and safe stress check calculation construction method are invaded in Tunnel deformation | |
| CN102562099B (en) | Method for carrying out rapid face excavation construction of loess tunnel by double rows of small conduits | |
| CN108005664A (en) | A kind of hole pile construction method of platform structure | |
| CN106761778B (en) | A kind of underground digging in subway station construction technology suitable for upper-soft lower-hard ground | |
| CN104653187B (en) | Water-rich sand layer geology large cross-section tunnel excavation method | |
| CN109057807A (en) | A kind of gradual change Large span tunnel reversely digs method | |
| CN103899318B (en) | The milling of medium ground tunnel is dug and supporting machinery construction | |
| CN104929648A (en) | Method for constructing branch guide pits of tunnels | |
| CN107023300A (en) | A kind of use canopy, which is defended the doctrine, builds the construction method of subway station | |
| CN108487911A (en) | The compound crossing method construction method of longspan tunnel bilateral wall under complex geological condition | |
| CN108266209A (en) | A kind of big ledge method in large section subway station excavates the rapid constructing method of lower part | |
| CN107503755A (en) | A kind of construction method for exempting from button arch flat-top cavern-pile method construction subway station | |
| CN102748040A (en) | Main structure for metro long-span station and pillar arching construction method thereof | |
| CN104929649A (en) | Tunnel transverse cave-to-master cave top brushing construction method and top brushing structure | |
| CN108035733A (en) | A kind of perpendicular support partial excavation method of rock matter large section tunnel steelframe dike combination | |
| CN110159298A (en) | A kind of first branch button arch construction method of Underground Subway Station | |
| CN107489433A (en) | A kind of tunnel CRD engineering methods anti-leakage structure and Antiseep method | |
| CN110374657A (en) | The Mining Method Subway Tunnel ventilating shaft and its construction method of " well after first shield " | |
| CN107939415A (en) | Stay the micro- two step constructions method of Core Soil in the soft plastic clay tunnel of Shallow-buried Large-span | |
| CN207813651U (en) | A kind of ground water drainage system for double-hole tunnel | |
| CN109578007A (en) | Pass through that high angle is inverse to rush rich water richness sand tomography tunnel excavation and drainage and construction method | |
| CN107091092A (en) | The approximate full face tunneling structure of mountain highway tunnel neutrality country rock and method | |
| CN204716248U (en) | Tunnel Heng Dong enters main hole and to caunch structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |