CN104763435B - Construction method of shallow-buried excavation type large cross section of tunnel in tail slag filling area - Google Patents
Construction method of shallow-buried excavation type large cross section of tunnel in tail slag filling area Download PDFInfo
- Publication number
- CN104763435B CN104763435B CN201510092254.5A CN201510092254A CN104763435B CN 104763435 B CN104763435 B CN 104763435B CN 201510092254 A CN201510092254 A CN 201510092254A CN 104763435 B CN104763435 B CN 104763435B
- Authority
- CN
- China
- Prior art keywords
- pilot tunnel
- tunnel
- pilot
- construction
- predicament
- 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.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Abstract
The invention discloses a construction method of a shallow-buried excavation type large cross section of tunnel in a tail slag filling area. The construction method comprises performing sleeve valve pipe grouting reinforcement on the slag filling on the ground according to the construction survey lofting reinforcement range; performing side slope and upward slope cutting and elevation on the tunnel to be excavated on the ground earthwork and performing construction of cover arch foundation piles at the position of a hole of the tunnel to be excavated; performing pre-stressed anchor cable reinforcement on a side slope and an upward slope and performing cover arch and large pipe shed construction on the cover-arch foundation piles; performing funnel hole body excavation by a double-side-wall vertical pilot heading excavation method; performing initial supporting construction and anchor spray concrete construction on a hole body of the tunnel after the excavation on the hole body of the tunnel is achieved; performing waterproof layer construction and secondary lining construction on the hole body of the tunnel; performing clay backfill above the hole body of the tunnel under the ground elevation is restored. According to the construction method of the shallow-buried excavation type large cross section of tunnel in the tail slag filling area, the funnel hole body excavation is performed by the double-side-wall vertical pilot heading excavation method due to the shallow-buried excavation and large cross section characteristics of the tail slag filling area and accordingly the tunnel excavation difficulty is reduced and the construction quality is ensured.
Description
Technical field
The present invention relates to technical field of tunnel construction, refer in particular to a kind of mine tailings and fill out area's shallow buried covered excavation large cross-section tunnel apply
Work method.
Background technology
With the expansion of China's expanding economy and infrastructure construction scale, Tunnel Engineering has become highway, railway, city
Important engineering in the mega projects such as political affairs；And because surrounding enviroment, geological conditions limit；Or it is growing in order to better meet
The magnitude of traffic flow, transportation condition；Or for pursuing the spacious effect of large space, the tunnel of shallow buried covered excavation big cross section form increasingly increases
Many, but because span is big, complex geologic conditions, the domestic experience still lacking maturation, relevant criterion, the reference role of specification have
Limit, builds Super-large-section tunnel difficulty bigger especially under complex geological condition and surrounding enviroment.
Fill out area especially in mine tailings, because slag body is loose, cohesion is little, shearing strength is low, self-stable ability is poor
Etc. defect, easily cave in, and because tunnel excavation section is higher, vault buried depth ratio is shallower, surrounding enviroment narrow space,
Two lining constructions cannot be carried out using formwork jumbo.
Content of the invention
In view of the problems referred to above, the invention provides a kind of mine tailings fill out area's shallow buried covered excavation large-section tunnel construction method,
Including：
Reinforcing scope according to construction survey setting-out bankets to the slag on ground and carries out sleeve valve barrel grouting consolidation process；
The ground earthwork is carried out with side slope, faces upward slope brush slope to the absolute altitude treating tunneling, treating the openings position of tunneling
Carry out covering the construction of skewback stake；
To described side slope with face upward slope and carry out prestressed anchor reinforcement, the skewback stake of described set is carried out cover arch and steel tube shed
Construction；
Excavation method using the upper and lower pilot tunnel of double side wall carries out tunnel trunk excavation；
After the completion of tunnel trunk excavates, described tunnel trunk is carried out with preliminary bracing construction and anchor spraying concrete construction；
Construction of waterproof layer and Second Lining Construction are carried out to described tunnel trunk；
Carry out backfilling clay to recovering ground elevation above described tunnel trunk.
The mine tailings of the present invention fill out area's shallow buried covered excavation large-section tunnel construction method, fill out area's shallow buried covered excavation for mine tailings big
The feature of section, the excavation method using the upper and lower pilot tunnel of double side wall carries out tunnel trunk excavation, and whole tunnel big cross section is divided into
Multiple light sections are constructed, and each light section individually excavates driving, can simplify the difficulty of tunnel excavation, can protect simultaneously again
Card construction quality.
Mine tailings of the present invention fill out further improvement is that of area's shallow buried covered excavation large-section tunnel construction method, to the ground earthwork
Carry out side slope, face upward slope brush slope to when the absolute altitude of tunneling, carry out excavate step by step from top to bottom and supporting step by step mode
Carry out stage excavation and protective reinforcing.
Mine tailings of the present invention fill out further improvement is that of area's shallow buried covered excavation large-section tunnel construction method, described described
Carry out covering the construction of arch and steel tube shed in set skewback stake, including：
Construction Guan Liang in the skewback stake of described set, installs steel arch-shelf in described Guan Liang；
Installation set arch exterior sheathing casting concrete formation set arch on described steel arch-shelf；
After described set arch reaches intensity, on described set arch, back-pressure preset thickness bankets；
In end one circle of described set arch, barricade is arranged using concrete；
Be staggeredly arranged on described set arch double-deck steel tube shed, carries out slip casting after steel tube shed installation；
Slip casting carries out tight filling with cement mortar to described steel tube shed after terminating.
Barricade can anti-backstop slope top back-pressure soil drop, and water conservancy diversion surface water is to tunnel both sides gutter.
Mine tailings of the present invention fill out further improvement is that of area's shallow buried covered excavation large-section tunnel construction method, using double side wall
During the excavation method of pilot tunnel carries out tunnel trunk excavation up and down, reserved rock beam and Core Soil in the middle part of described tunnel trunk
Form cross support, described tunnel trunk cuts described cross support after the completion of excavating.Can be with enhancing level support strength
And resistance to overturning, reduce tunnel horizontal convergence amount and vault sinking value.
Mine tailings of the present invention fill out further improvement is that of area's shallow buried covered excavation large-section tunnel construction method, using double side wall
Before the excavation method of pilot tunnel carries out tunnel trunk excavation up and down, carry out region division to excavating region, including：
Described tunnel trunk is pressed upper left position, upper right Angle Position, lower right position and the lower left corner of its face
Position is divided into the first pilot tunnel, the second pilot tunnel, the 3rd pilot tunnel and the 4th pilot tunnel；
The part that described cross support is located between described first pilot tunnel and described 4th pilot tunnel is divided into the 5th and leads
Hole；
The part that described cross support is located between described second pilot tunnel and described 3rd pilot tunnel is divided into the 6th and leads
Hole；
The part that described cross support is located between described first pilot tunnel and described second pilot tunnel is divided into the 7th and leads
Hole；
The part that described cross support is located between described 3rd pilot tunnel and described 4th pilot tunnel is divided into the 8th and leads
Hole；
Described cross support is located at described 5th pilot tunnel, described 6th pilot tunnel, described 7th pilot tunnel and described the
Part between eight pilot tunnels is divided into the 9th pilot tunnel；
By described first pilot tunnel, described second pilot tunnel, described 3rd pilot tunnel, described 4th pilot tunnel, described 5th pilot tunnel, institute
State the 6th pilot tunnel, described 7th pilot tunnel, described 8th pilot tunnel and described 9th pilot tunnel to be all divided into top bar and get out of a predicament or an embarrassing situation two
Region.
Mine tailings of the present invention fill out further improvement is that of area's shallow buried covered excavation large-section tunnel construction method, and described employing is double
The excavation method of the upper and lower pilot tunnel of side wall carries out tunnel trunk, including：
Excavate the top bar of described first pilot tunnel and the top bar of described second pilot tunnel, set up appearing on the stage of described first pilot tunnel
First structure in the range of the top bar of rank and described second pilot tunnel；
Excavate getting out of a predicament or an embarrassing situation of described first pilot tunnel and getting out of a predicament or an embarrassing situation of described second pilot tunnel, set up the leave from office of described first pilot tunnel
First structure in the range of the getting out of a predicament or an embarrassing situation of rank and described second pilot tunnel；
Excavate top bar, described 4th top bar of pilot tunnel and the appearing on the stage of described 7th pilot tunnel of described 3rd pilot tunnel
Rank, sets up the order range of appearing on the stage of the top bar, the top bar of described 4th pilot tunnel and described 7th pilot tunnel of described 3rd pilot tunnel
First interior structure；
Excavate the getting out of a predicament or an embarrassing situation of described 3rd pilot tunnel, described 4th pilot tunnel get out of a predicament or an embarrassing situation and described 7th pilot tunnel leave from office
Rank, set up the getting out of a predicament or an embarrassing situation of described 3rd pilot tunnel, described 4th pilot tunnel get out of a predicament or an embarrassing situation and described 7th pilot tunnel leave from office order range
First interior structure；
Excavate the top bar of described 5th pilot tunnel and the top bar of described 6th pilot tunnel, set up appearing on the stage of described 5th pilot tunnel
First structure in the range of the top bar of rank and described 6th pilot tunnel；
Excavate described 5th getting out of a predicament or an embarrassing situation of pilot tunnel and getting out of a predicament or an embarrassing situation of described 6th pilot tunnel, set up the leave from office of described 5th pilot tunnel
First structure in the range of the getting out of a predicament or an embarrassing situation of rank and described 6th pilot tunnel；
Excavate the top bar of described 9th pilot tunnel, set up first structure in the range of the top bar of described 9th pilot tunnel；
Excavate getting out of a predicament or an embarrassing situation of described 9th pilot tunnel, set up first structure in the range of the getting out of a predicament or an embarrassing situation of described 9th pilot tunnel；
Excavate the top bar of described 8th pilot tunnel, set up first structure in the range of the top bar of described 8th pilot tunnel；
Excavate getting out of a predicament or an embarrassing situation of described 8th pilot tunnel, set up first structure in the range of the getting out of a predicament or an embarrassing situation of described 8th pilot tunnel.
Mine tailings of the present invention fill out further improvement is that of area's shallow buried covered excavation large-section tunnel construction method, and the described 3rd leads
After the completion of hole and described 4th pilot tunnel construction, excavate one respectively for slag in the front of described 3rd pilot tunnel and described 4th pilot tunnel
The auxiliary pilot tunnel of soil transport.
Mine tailings of the present invention fill out further improvement is that of area's shallow buried covered excavation large-section tunnel construction method, excavate described auxiliary
Assistant director of a film or play hole, including：
Excavate auxiliary pilot tunnel set arch groove in the openings position of described auxiliary pilot tunnel；
Described set arch groove carries out assisting the construction of pilot tunnel set arch and auxiliary pilot tunnel steel tube shed；
Excavate and form described auxiliary pilot tunnel, set up first structure of described auxiliary pilot tunnel.
Mine tailings of the present invention fill out further improvement is that of area's shallow buried covered excavation large-section tunnel construction method：
In described first pilot tunnel, described second pilot tunnel, described 3rd pilot tunnel, described 4th pilot tunnel, described 5th pilot tunnel, institute
Between stating the 6th pilot tunnel, described 7th pilot tunnel, described 8th pilot tunnel and the respective top bar of described 9th pilot tunnel and getting out of a predicament or an embarrassing situation
It is provided with false stull to be separated；
In described first pilot tunnel and described 5th pilot tunnel, described 5th pilot tunnel and described 4th pilot tunnel, described 7th pilot tunnel
With described 9th pilot tunnel, described 9th pilot tunnel and described 8th pilot tunnel, described second pilot tunnel and described 6th pilot tunnel and described
It is provided with false stull between 6th pilot tunnel and described 3rd pilot tunnel to be separated；
In described first pilot tunnel and described 7th pilot tunnel, described 7th pilot tunnel and described second pilot tunnel, described 5th pilot tunnel
With described 9th pilot tunnel, described 9th pilot tunnel and described 6th pilot tunnel, described 4th pilot tunnel and described 8th pilot tunnel and described
It is provided with interim mid-board between 8th pilot tunnel and described 3rd pilot tunnel to be separated.
Mine tailings of the present invention fill out further improvement is that of area's shallow buried covered excavation large-section tunnel construction method, described to described
Tunnel trunk carries out construction of waterproof layer and Second Lining Construction, including：
The space of described 3rd pilot tunnel, the space of described 4th pilot tunnel and the space of described 8th pilot tunnel are divided into institute
State the inverted arch region of tunnel trunk；
Remove the false stull in described inverted arch region and interim mid-board；
Set up full hall scaffold in described inverted arch region；
Construction of waterproof layer and Second Lining Construction are carried out to described inverted arch region；
By the space of described 5th pilot tunnel, the space of described 6th pilot tunnel, the space of described 9th pilot tunnel, described first lead
The space got out of a predicament or an embarrassing situation in the space got out of a predicament or an embarrassing situation in hole, the space got out of a predicament or an embarrassing situation of described second pilot tunnel and described 7th pilot tunnel is drawn
It is divided into the arch wall region of described tunnel trunk；
Remove the false stull in described arch wall region and interim mid-board；
Set up full hall scaffold in described arch wall region；
Construction of waterproof layer and Second Lining Construction are carried out to described arch wall region；
By the space of the top bar of described first pilot tunnel, the space of the top bar of described second pilot tunnel and the described 7th
The space of the top bar of pilot tunnel is divided into the crown area of described tunnel trunk；
Remove the false stull in described crown area and interim mid-board；
Set up full hall scaffold in described crown area；
Construction of waterproof layer and Second Lining Construction are carried out to described crown area.
Brief description
Fig. 1 is the flow chart that mine tailings of the present invention fill out area's shallow buried covered excavation large-section tunnel construction method.
Fig. 2～Figure 15 is the stage schematic diagram that mine tailings of the present invention fill out area's shallow buried covered excavation large-section tunnel construction method.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, not
For limiting the present invention.
Refer to Fig. 1, Fig. 1 is the flow chart that mine tailings of the present invention fill out area's shallow buried covered excavation large-section tunnel construction method.Join
Close referring to shown in Fig. 1, mine tailings of the present invention fill out area's shallow buried covered excavation large-section tunnel construction method, including：
S101 bankets to the slag on ground according to the reinforcing scope of construction survey setting-out and carries out sleeve valve barrel grouting consolidation process；
S102 carries out side slope, faces upward slope brush slope to the absolute altitude treating tunneling, at the hole treating tunneling to the ground earthwork
Position carries out covering the construction of skewback stake；
S103 to described side slope and faces upward slope and carries out prestressed anchor reinforcement, carries out set arch and big manage in the skewback stake of described set
The construction of canopy；
S104 carries out tunnel trunk excavation using the excavation method of the upper and lower pilot tunnel of double side wall；
After the completion of S105 tunnel trunk excavates, preliminary bracing construction is carried out to described tunnel trunk and anchor spraying concrete is applied
Work；
S106 carries out construction of waterproof layer and Second Lining Construction to described tunnel trunk；
S107 carries out backfilling clay to recovering ground elevation above described tunnel trunk.
Refer to Fig. 2～Figure 15, Fig. 2～Figure 15 is that mine tailings of the present invention fill out area's shallow buried covered excavation large-section tunnel construction method
Stage schematic diagram.Below in conjunction with Fig. 2～Figure 15, area's shallow buried covered excavation large-section tunnel construction method is filled out to the mine tailings of the present invention
It is described in detail.
S101In conjunction with shown in Fig. 2, the reinforcing scope according to construction survey setting-out bankets to the slag on ground and carries out mini-valve tube
Grouting and reinforcing is processed, and reinforcing scope A is as shown in Figure 2；
1) according to measuring reinforcing scope, the slag on ground is banketed and carry out sleeve valve barrel grouting consolidation process, reinforcement depth is from existing
Shape ground reinforces below severely-weathered layer.
2) in mini-valve tube drilling process, using alloy bit, for preventing the collapse hole holed, carry out debugging mud using bentonite
Slurry retaining wall.Cycle through leather hose and the drilling rod of mud connect and complete；Pass through drilling rod after pore-forming and in the hole mud is replaced sleeve shell material, set
Shell material carries out proportioning according to a certain percentage by cement, bentonite, water.
3) adopt dual-liquid slip-casting material during slip casting, dual-liquid slip-casting material adopts 42.5 grades of ordinary portland cements and 30～40Be ' water
Glass；Grouting Pipe adopts 48mm mini-valve tube, after being cemented mini-valve tube and PVC connection sleeve pipe using U PVC adhesive, by slip casting
Inner tube with double plug pipes connect together with put to mini-valve tube bottom after, segmentation, quantitation, interval two fluid grouting from lower to upper；Injected hole
Delta-type is arranged, slurries pack completeness is not less than 85%, after slip casting terminates, and closes injected hole using stop grouting plug, prevents grout.
S102In conjunction with shown in Fig. 2, earth excavation, the ground earthwork is carried out with side slope, faces upward slope brush slope to treating tunneling (i.e. tunnel
Road barrel 1) absolute altitude, the openings position treating tunneling carry out cover skewback stake 2 construction；
1) side slope, face upward the construction carrying out covering the lower stake of arch after slope brush domatic becomes operating platform, according to mine tailings packing course, in, micro-
The alternate geological condition of weathering tufa stone layer, is carried out with reference to hard alloy hosqe bit, pick rotary drilling digger using rotary drilling rig
Classification spiral-digging pore, accelerating construction progress, raising work efficiency.
2) adopt hosqe bit during rotary digging, after drill bit is dropped to desired depth by the hole, rotary drilling-head simultaneously pressurizes, and will revolve
The slag rising is clamp-oned in drilling pipe, by drill bit bottom lock and propose, outside hole, to pour out waste；In entrance, gentle breeze tufa stone layer, use
Pick hosqe bit device to hole inner cores circumference carries out loosening rock stratum, then using the rotation of the Double bottom studding with tungsten-cobalt hard alloy two-door pick
Dig drill bit to carry out dragging for quarrel.
S103In conjunction with shown in Fig. 3, to described side slope with face upward slope and carry out prestressed anchor reinforcement, in the skewback stake 2 of described set
Carry out covering the construction of arch 3 and steel tube shed, including：
Construction Guan Liang 4 in set skewback stake 2, installs steel arch-shelf in Guan Liang 4；
Installation set arch exterior sheathing casting concrete formation set arch 3 on described steel arch-shelf；
After described set arch reaches intensity, the filling out of the banketing of back-pressure preset thickness on described set arch, preferably back-pressure 1m～2m
Soil；
In end one circle of described set arch, barricade is arranged using concrete, it is preferred to use C20 concrete；
Be staggeredly arranged on described set arch double-deck steel tube shed, carries out slip casting after steel tube shed installation；
Slip casting carries out tight filling with cement mortar to described steel tube shed after terminating, it is preferred to use M30 cement.
1) Tunnel slope adopts fin-plate type prestressed anchor reinforcement or local to adopt prestress anchorage cable bored concrete pile as gear soil
Wall is reinforced, and faces upward slope and adopts spray anchor protection；The stage excavation protection of excavation, supporting step by step step by step is carried out from top to bottom on face-upward slope brush slope
Reinforce, excavate and divide several faces layering slopes.
2) set arch adopts C25 concrete, and sectional dimension is 6m*1m, constructs in stake top Guan Liang, as the guiding wall of steel tube shed
Ensure its construction precision；Work 20b bilayer I-steel bow member is set, steelframe outer rim sets in set archWall thickness 6mm guides steel pipe, steel
Pipe and steelframe welding.Steelframe each unit by connecting plate welding fabrication, by bolt connection between unit, joint weld bead height.Web
H/f=9mm, edge of a wing h/f=12mm.Each layer work 20b I-steel bow member adopts the welding of interior outside two-layer longitudinally connected muscle integral,
Longitudinally connected muscle adopts HRB335 (22) reinforcing bar, circumferential distance 1m.
3) I-steel bow member is processed by bending machine segmentation clod wash, controls deformation and the axis situation of bow member, steel during splicing
Require when bow member is installed and orifice tube welding pre-buried in set arch.After I-steel bow member installation, installation set arch exterior sheathing simultaneously pours
Build concrete.After set arch reaches intensity, the upper back-pressure 1m～2m of set arch bankets, in the end one circle setting 1m barricade of set arch, barricade
Using C20 concrete, anti-backstop slope top back-pressure soil drops, and water conservancy diversion surface water is to tunnel both sides gutter.
4) it is to prevent shallow-layer poor strata landslide during tunnel excavation it is ensured that construction safety, adopt double-deck φ 108 before entering hole certainly
Enter formula pipe canopy, arrange in the range of 150 ° of arch, circumferential distance 0.4m.Steel tube shed parameter is as follows：
4.1 steel pipe specifications：Hot rolled seamless steel tube, section long 4～6m, caliber 108mm, wall thickness 9mm；Formed with screwed connection；
4.2 pipes away from：Circumferential distance 400mm.
Injected hole, aperture 10～16mm is bored, pitch of holes 11cm, in quincuncial arrangement on 4.3 steel floral tubes；
4.4 inclination angle：1 °～3 ° of outer limb.
5) double-deck steel tube shed is staggeredly arranged, and using there being hole steel floral tube, steel floral tube carries out slip casting, slip casting after installing to steel tube shed
Using neat slurry segmenting slip casting；Grouting parameter：The cement mortar ratio of mud 1:1～1:1.5；Grouting pressure：0.7～1.0MPa, note
Slurry removes in time in pipe slurries and with the tight filling of M30 cement mortar, the rigidity of reinforced pipe canopy and intensity after terminating；Arch Ф 42
Advanced tubule L=3.5m, circumferential distance 0.4m.
6) grouting amount of single steel floral tube is estimated as the following formula：Q=π R/k2/L η ξ, in formula, Rk is grout spreading range, takes Rk
=0.6Lo；Lo is steel floral tube center distance；L is spray of molten steel pipe range；ξ takes 0.85, is slip casting repletion coefficient；η is voidage (%),
Slag layer takes 45% calculating.
S104Excavation method using the upper and lower pilot tunnel of double side wall carries out tunnel trunk excavation；
1) it is to ensure safety for tunnel engineering and reduce the impact to peripheral path for the tunnel excavation, and it is disconnected greatly to make full use of tunnel
The advantage in face, accelerates speed of application, take parallel to pilot tunnel construction method, and the excavation method using the upper and lower pilot tunnel of double side wall；With
When for keep soil body monolithic stability, in the middle part of tunnel reserve a horizontal rock beam, side pilot tunnel is divided into 4 Pollen sterility and is excavated,
Form " cross " shape to support；After the completion of pilot tunnel inverted arch and short abutment wall under the wall of both sides side, then release both sides rock beam and segmentation releases
The twin side heading method of top Core Soil；Pilot drive adopts excavator to excavate, and the cubic meter of stone adopts weak blast, and excavator dress is cut, certainly
Unload formula Automobile Transportation.Bore bolthole with artificial, anchor pole is installed and is anchored or slip casting.
2) excavated using the upper and lower pilot tunnel of double side wall pilot tunnel simultaneously, whole tunnel big cross section is divided into left and right multiple little disconnected up and down
Surface construction, each light section individually excavates driving, during reserved rock beam form " cross " shape with Core Soil and support, enhancing level
Support strength and resistance to overturning, reduce tunnel horizontal convergence amount and vault sinking value.It is the requirement meeting the construction period simultaneously,
To tunnel excavation and return the operation built and be optimized adjustment, horizontal rock beam and Core Soil are successively released, simplifies complexity, reduce
Construction joint quantity, beneficial to two lining waterproofs.And increase the second layer just Zhi Houdu, meet the first Zhi Gangdu removing during temporary support.
3) it is to keep the self stability of rock pillar and ensure influencing each other of both sides pilot drive, take measures as follows：First
Row tunnel sets Grouting Pipe to opposite side tunnel and carries out grouting and reinforcing to rock pillar；Its 28d non-confining strength of the soil body after reinforcing
Degree is not less than 1MPa.Grouting Pipe parameter：1) material：Steel pipe adopts external diameter 42mm, the hot rolled seamless steel tube of wall thickness 3.5mm；2) between
Away from：Steel pipe circumferential distance is 0.5m；3) slip casting：Using cement grout slip casting, grouting pressure controls in 0.7～1.0MPa.
Specifically, refering to Fig. 4～Figure 11, tunnel trunk digging process is described in detail.Combine Fig. 4 institute first
Show, during tunnel trunk excavation is carried out using the excavation method of the upper and lower pilot tunnel of double side wall, reserve at the middle part of tunnel trunk 1
Rock beam and Core Soil form cross support 5, and tunnel trunk 1 cuts cross support 5 after the completion of excavating.In conjunction with shown in Fig. 5,
Before tunnel trunk excavates, carry out region division to excavating region, including：
Tunnel trunk 1 is pressed upper left position, upper right Angle Position, lower right position and the lower-left Angle Position of its face
It is divided into the first pilot tunnel 10, the second pilot tunnel 20, the 3rd pilot tunnel 30 and the 4th pilot tunnel 40；
5 parts being located between the first pilot tunnel 10 and the 4th pilot tunnel 40 are supported to be divided into the 5th pilot tunnel 50 by cross；
5 parts being located between the second pilot tunnel 20 and the 3rd pilot tunnel 30 are supported to be divided into the 6th pilot tunnel 60 by cross；
5 parts being located between the first pilot tunnel 10 and the second pilot tunnel 20 are supported to be divided into the 7th pilot tunnel 70 by cross；
5 parts being located between the 3rd pilot tunnel 30 and the 4th pilot tunnel 40 are supported to be divided into the 8th pilot tunnel 80 by cross；
5 are supported to be located between the 5th pilot tunnel 50, the 6th pilot tunnel 60, the 7th pilot tunnel 70 and the 8th pilot tunnel 80 by cross
Part is divided into the 9th pilot tunnel 90；
By the first pilot tunnel 10, the second pilot tunnel 20, the 3rd pilot tunnel 30, the 4th pilot tunnel 40, the 5th pilot tunnel 50, the 6th pilot tunnel 60,
7th pilot tunnel 70, the 8th pilot tunnel 80 and the 9th pilot tunnel 90 are all divided into top bar and two regions of getting out of a predicament or an embarrassing situation.
In conjunction with shown in Fig. 6～Figure 10, the described excavation method using the upper and lower pilot tunnel of double side wall carries out tunnel trunk, including：
Shown in Figure 6, excavate the top bar 11 of the first pilot tunnel 10 and the top bar 21 of the second pilot tunnel 20, set up first and lead
First structure in the range of the top bar 21 of the top bar 11 in hole 10 and the second pilot tunnel 20, and the top bar 11 in the first pilot tunnel 10
Counter-pulled bolts are set up and the top bar 21 of the second pilot tunnel 20 between；
Shown in Figure 6, excavate the first pilot tunnel 10 get out of a predicament or an embarrassing situation 12 and second pilot tunnel 20 get out of a predicament or an embarrassing situation 22, set up first and lead
10 holes get out of a predicament or an embarrassing situation 12 and second pilot tunnel 20 the first structure got out of a predicament or an embarrassing situation in the range of 22, and get out of a predicament or an embarrassing situation 12 in the first pilot tunnel 10
And getting out of a predicament or an embarrassing situation of the second pilot tunnel 20 sets up Counter-pulled bolts between 22；
Shown in Figure 7, excavate top bar 31, the top bar 41 of the 4th pilot tunnel 40 and the 7th pilot tunnel of the 3rd pilot tunnel 30
70 top bar 71, sets up the upper of the top bar 31 of the 3rd pilot tunnel 30, the top bar 41 of the 4th pilot tunnel 40 and the 7th pilot tunnel 70
First structure in the range of step 71, and set up between the top bar 31 in the 3rd pilot tunnel 30 and the top bar 41 of the 4th pilot tunnel 40
Counter-pulled bolts；
Shown in Figure 7, excavate get out of a predicament or an embarrassing situation 42 and the 7th pilot tunnel of the 32, the 4th pilot tunnel 40 of getting out of a predicament or an embarrassing situation of the 3rd pilot tunnel 30
70 get out of a predicament or an embarrassing situation 72, set up the 3rd pilot tunnel 30 the 32, the 4th pilot tunnel 40 of getting out of a predicament or an embarrassing situation get out of a predicament or an embarrassing situation 42 and the 7th under pilot tunnel 70
First structure in the range of step 72；
Shown in Figure 8, excavate the top bar 51 of the 5th pilot tunnel 50 and the top bar 61 of the 6th pilot tunnel 60, set up the 5th and lead
First structure in the range of the top bar 61 of the top bar 51 in hole 50 and the 6th pilot tunnel 60, and the top bar 51 in the 5th pilot tunnel 50
Counter-pulled bolts are set up and the top bar 61 of the 6th pilot tunnel 60 between；
Shown in Figure 8, excavate the 5th pilot tunnel 50 get out of a predicament or an embarrassing situation 52 and the 6th pilot tunnel 60 get out of a predicament or an embarrassing situation 62, set up the 5th and lead
Hole 50 get out of a predicament or an embarrassing situation 52 and the 6th pilot tunnel 60 the first structure got out of a predicament or an embarrassing situation in the range of 62, and get out of a predicament or an embarrassing situation 52 in the 5th pilot tunnel 50
And getting out of a predicament or an embarrassing situation of the 6th pilot tunnel 60 sets up Counter-pulled bolts between 62；
Shown in Figure 9, excavate the top bar 91 of the 9th pilot tunnel 90, set up in the range of the top bar 91 of the 9th pilot tunnel 90
A just structure；
Shown in Figure 9, that excavates the 9th pilot tunnel 90 gets out of a predicament or an embarrassing situation 92, sets up the 90 of the 9th pilot tunnel and gets out of a predicament or an embarrassing situation in the range of 92
A just structure；
Shown in Figure 10, excavate the top bar 81 of the 8th pilot tunnel 80, set up in the range of the top bar 81 of the 8th pilot tunnel 80
First structure；
Shown in Figure 10, that excavates the 8th pilot tunnel 80 gets out of a predicament or an embarrassing situation 82, and set up the 8th pilot tunnel 80 gets out of a predicament or an embarrassing situation in the range of 82
First structure.
Further, in conjunction with shown in Figure 10, during excavating, often dug a stage, just the first pilot tunnel 10, the
Two pilot tunnels 20, the 3rd pilot tunnel 30, the 4th pilot tunnel 40, the 5th pilot tunnel 50, the 6th pilot tunnel 60, the 7th pilot tunnel 70, the 8th pilot tunnel 80 with
And the respective top bar of the 9th pilot tunnel 90 and be respectively provided with false stull 6 between getting out of a predicament or an embarrassing situation and be separated；
Between the first pilot tunnel 10 and the 5th pilot tunnel 50, between the 5th pilot tunnel 50 and the 4th pilot tunnel 40, the 7th pilot tunnel 70 with
Between 9th pilot tunnel 90, between the 9th pilot tunnel 90 and the 8th pilot tunnel 80, between the second pilot tunnel 20 and the 6th pilot tunnel 60 and the 6th
It is provided with false stull 6 between pilot tunnel 60 and the 3rd pilot tunnel 30 to be separated；
Between the first pilot tunnel 10 and the 7th pilot tunnel 70, between the 7th pilot tunnel 70 and the second pilot tunnel 20, the 5th pilot tunnel 50 with
Between 9th pilot tunnel 90, between the 9th pilot tunnel 90 and the 6th pilot tunnel 60, between the 4th pilot tunnel 40 and the 8th pilot tunnel 80 and the 8th
It is provided with interim mid-board 7 between pilot tunnel 80 and the 3rd pilot tunnel 30 to be separated.
It is preferred that after the completion of described 3rd pilot tunnel and described 4th pilot tunnel construction, in described 3rd pilot tunnel and the described 4th
An auxiliary pilot tunnel being used for dregs transportation is excavated in the front of pilot tunnel respectively, including：
Excavate auxiliary pilot tunnel set arch groove in the openings position of described auxiliary pilot tunnel；
Described set arch groove carries out assisting the construction of pilot tunnel set arch and auxiliary pilot tunnel steel tube shed；
Excavate and form described auxiliary pilot tunnel, set up first structure of described auxiliary pilot tunnel.
S105After the completion of tunnel trunk excavates, preliminary bracing construction is carried out to described tunnel trunk and anchor spraying concrete is applied
Work；
1) preliminary bracing adopts pneumatically placed concrete, bar-mat reinforcement, profile steel frame and grid steel frame；Steelframe supports using double-deck bow member
(ground floor shaped steel arch, second layer grillage), gib is arranged at each pilot tunnel and step, interim steelframe：Using
I-steel or H profile steel, tunneling boring is arranged, and steelframe supports must have necessary rigidity and intensity, should ensure that can individually bear 2～
The high loosening rock pillar weight of 4m, shape should be adapted with excavated section.Supported joint is connect firmly using bolt two, adopts between steelframe
Coupled with longitudinal reinforcement, arch springing must be placed on firm base, and in every Pin steelframe arch springing both sides and digging process, temporary support pin point is each
Some lock pin anchor tubes of setting.
2) anchor pole：Using 22 grouting rock bolts, it is in interlaced arrangement at a certain distance；Bar-mat reinforcement：Using 150*150 individual layer reinforcing bar
Net；Grouting small pilot pipe：UsingHot rolled seamless steel tube, wall thickness 3.5mm, outer limb is 5 °～10 °, circumferential distance
40mm, consolidates to loose rock mass around barrel, forms barrel consolidation circle.
Due to during constructing tunnel in the case that the top bar excavation supporting of each pilot tunnel tends towards stability, the getting out of a predicament or an embarrassing situation of each pilot tunnel
During excavation, the Secondary Disturbance of country rock and top heavy-duty vehicle are walked, easily cause vault sinking and the abutment wall convergence of country rock,
Secondary deformation occurs.Therefore, the monitoring measurement to country rock must be strengthened in the work progress in tunnel, and in time data be carried out point
Analysis feedback, the project of monitoring measurement mainly has：Vault sinking, surface subsidence, horizontal convergence, anchor axial force, steel arch support internal force
And external force, surface cracks measurement, delaminating deposition etc..Arrangement such as Figure 11 of measurement distributed points 8 shows, concrete arrangement requirement such as table 1 institute
Show.
Table 1
S106Construction of waterproof layer and Second Lining Construction are carried out to described tunnel trunk；
Construction of waterproof layer：
1) it is basic with impermeable structure, by the development of control structure distress in concrete, improve the impermeability of concrete
Energy；Attached most importance to construction joint, movement joint, the temporarily first waterproof being wrapped in the detail structure such as node, pile crown at two linings, exist simultaneously
The flexible full-packaging waterproof layer of structure upstream face setting.
2) full bag waterproof is carried out using 2mm thickness EVA splash guard, 400g/m is set between splash guard and basic unit2Non-woven fabrics delay
Rush layer, the waterproof layer upper surface setting 400g/m at base plate plane position2Non-woven fabrics protective layer, pour C20 pea gravel concreten protect
Sheath；
3), after two lining concretings finish, the waterproof layer and two to arch crown part carries out backfilling injecting treatment between serving as a contrast.
Waterproof layer surface is spoted weld using slip casting base, finishes grouting behind shaft or drift lining in two lining constructions and fill the sky between splash guard and two linings
Gap.
4) filling system includes slip casting base and grouting pipe, and slip casting base should be with waterproof layer sweat soldering.Grouting pipe
Using plastic screwed pipe, there is enough compression strength it is ensured that the part that embedment is built in concrete is not crushed.Slip casting pedestal edge
Edge adopts four spot weldings in waterproof plate surface, and 4 points should be symmetrical arranged, and each pad is 10*10mm；Welding should be firmly, it is to avoid
During disturbing concrete, base departs from splash guard.Grouting pipe is connected with slip casting base should be firm, airtight, if necessary will using iron wire
Between conduit and base, connecting portion colligation is firm, it is to avoid base is departed from conduit.
5) between structure inverted arch structure and waterproof layer arrange white-out water system, percolating water is carried out limited, enter in a organized way
Both sides gutter, it is to avoid water pressure accumulation at inverted arch.Inverted arch white-out water system is between construction joint (or movement joint) for a waterproof
Subregion, in a waterproof subregion, is made up of longitudinal Permeable blind pipe and horizontal blind pipe.
5.1 longitudinal Permeable blind pipes：Longitudinal Permeable blind pipe adopts HDPE50/41 double-walled punching bellows, and percent opening is not less than
40%, perforate is long strip type, and aperture is uniformly distributed in the range of 360 °, ring stiffness >=4kpa.Longitudinal Permeable blind pipe is arranged on to be faced upward
Between arch bottom waterproof plate and secondary lining, punching ripple bottom of the tube is tamped using C20 non-fine concrete Water permeable body, overlying geotechnique
Cloth protective layer after-pouring pea gravel concreten protective layer.
5.2 horizontal blind pipes:Using HDPE50/41 double-wall corrugated pipe, do not punch, using three-way connection and longitudinal Permeable blind pipe
Connect, drainpipe is embedded in pea gravel concreten protective layer, draws and introduces in gutter exceeding road elevation 500mm position.
Second Lining Construction：
1) because surrounding enviroment condition limits it is impossible to carry out two lining constructions using formwork jumbo, propped up using setting up the full hall in high-altitude
Support carries out two lining operations, and all using 4012 steel forms, panel is all made template using 35 steel plates, is processed by specialized factory,
Template adopts seamless spliced.Reinforce and Ф 48*2.8 steel pipe scaffold " all round victory " support system, side are joined using 150H shaped steel arch
Wall adopts fastener type shuttering supporting, arch to adopt fastener type template die plate+Ф 14 split bolt to reinforce.Specific construction substantially divides three steps
Walk：Inverted arch part, arch wall part, vault part.
2) template construction parameter determination：The fastener steel tube type adopting in formwork region is 48*3.0, and template selects panel
For 35mm thickness steel form, the high 50mm of rib.All punching blocks are all laid on the H die steel arch-shelf of special processing on request, Ran Houman
Hall frame is reinforced.Using full hall frame (by the use of partly just propping up steelframe as support temporarily) in hole.
3) it is to ensure support system stability and safety, calculate what concrete produced to support system using finite element software
Load；Apply form according to Structural assignments with load, support system is done and simplifies, take wherein two rows to support as calculating object.
Totally three kinds of element type, support bar adopts 48 steel pipes, and formwork reinforcement adopts 150H shaped steel, and construction channel support adopts 20b shaped steel.
Model adopts beam element, and, all using beam element, steel form adopts for bracing frame, H profile steel, construction passage vertical rod and top horizontal bar
Slab element.Boundary condition is hinged, in every vertical rod lower end setting hinge constraint.And press construction way arrangement, determine in step sequence
Existing maximum pours height and maximum lateral pressure, is calculated.
4) according to result of finite element, to there is a possibility that to lead to support system unstability work because of discontinuity
Sequence, the system of being supported is reinforced, and reaches the requirement meeting stabilized soil pavement.
Specifically, refering to Figure 12～Figure 14, construction of waterproof layer and Second Lining Construction are described in detail.Described
Construction of waterproof layer and Second Lining Construction are carried out to described tunnel trunk, including：
In conjunction with shown in Figure 12, by the space of described 3rd pilot tunnel, the space of described 4th pilot tunnel and described 8th pilot tunnel
Space be divided into the inverted arch region 910 of described tunnel trunk；
Remove the false stull in inverted arch region 910 and interim mid-board；
Set up full hall scaffold in inverted arch region 910；
Using full hall scaffold, construction of waterproof layer and Second Lining Construction are carried out to inverted arch region 910；
In conjunction with shown in Figure 13, by the space of described 5th pilot tunnel, the space of described 6th pilot tunnel, described 9th pilot tunnel sky
Between, the space got out of a predicament or an embarrassing situation of described first pilot tunnel, under the space got out of a predicament or an embarrassing situation of described second pilot tunnel and described 7th pilot tunnel
The space of step is divided into the arch wall region 920 of described tunnel trunk；
Remove the false stull in arch wall region 920 and interim mid-board；
Set up full hall scaffold in arch wall region 920；
Using full hall scaffold, construction of waterproof layer and Second Lining Construction are carried out to arch wall region 920；
In conjunction with shown in Figure 14, by the space of the top bar of described first pilot tunnel, the space of the top bar of described second pilot tunnel,
And the space of the top bar of described 7th pilot tunnel is divided into the crown area 93 of described tunnel trunk；
Remove the false stull in crown area 93 and interim mid-board；
Set up full hall scaffold in crown area 93；
Using full hall scaffold, construction of waterproof layer and Second Lining Construction are carried out to crown area 93.
The construction of waterproof layer of the present invention and Second Lining Construction, solve in prior art, due to tunnel excavation section ratio
Higher, vault buried depth ratio is shallower, and surrounding enviroment narrow space it is impossible to carry out a difficult problem for Second Lining Construction using formwork jumbo.
S107Carry out backfilling clay 9 to recovery ground elevation above tunnel trunk 1.
Fill out area's shallow buried covered excavation large-section tunnel construction method for the mine tailings of the present invention above, the present invention fills out for mine tailings
The feature of area's shallow buried covered excavation big cross section, the excavation method using the upper and lower pilot tunnel of double side wall carries out tunnel trunk excavation, whole tunnel
Road big cross section is divided into multiple light sections and is constructed, and each light section individually excavates driving, can simplify the difficulty of tunnel excavation
Degree, can guarantee that construction quality simultaneously again.
The above is only presently preferred embodiments of the present invention, not the present invention is done with any pro forma restriction, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any is familiar with this professional technology people
Member, in the range of without departing from technical solution of the present invention, a little change or repaiies when the technology contents of available the disclosure above are made
Adorn the Equivalent embodiments for equivalent variations, as long as being the content without departing from technical solution of the present invention, the technology according to the present invention is real
Any simple modification, equivalent variations and modification that confrontation above example is made, all still fall within the scope of technical solution of the present invention
Interior.
Claims (10)
1. a kind of mine tailings fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that including：
Reinforcing scope according to construction survey setting-out bankets to the slag on ground and carries out sleeve valve barrel grouting consolidation process；
The ground earthwork is carried out with side slope, faces upward slope brush slope to the absolute altitude treating tunneling, carry out in the openings position treating tunneling
The construction of set skewback stake；
To described side slope with face upward slope and carry out prestressed anchor reinforcement, the skewback stake of described set is carried out cover applying of arch and steel tube shed
Work；
Excavation method using the upper and lower pilot tunnel of double side wall carries out tunnel trunk excavation；
After the completion of tunnel trunk excavates, described tunnel trunk is carried out with preliminary bracing construction and anchor spraying concrete construction；
Construction of waterproof layer and Second Lining Construction are carried out to described tunnel trunk；
Carry out backfilling clay to recovering ground elevation above described tunnel trunk.
2. mine tailings as claimed in claim 1 fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that to ground
The earthwork carries out side slope, faces upward slope brush slope and excavate step by step from top to bottom and supporting step by step to when the absolute altitude of tunneling, carrying out
Mode carries out stage excavation and protective reinforcing.
3. mine tailings as claimed in claim 1 fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that described
Carry out covering the construction of arch and steel tube shed in the skewback stake of described set, including：
Construction Guan Liang in the skewback stake of described set, installs steel arch-shelf in described Guan Liang；
Installation set arch exterior sheathing casting concrete formation set arch on described steel arch-shelf；
After described set arch reaches intensity, on described set arch, back-pressure preset thickness bankets；
In end one circle of described set arch, barricade is arranged using concrete；
Be staggeredly arranged on described set arch double-deck steel tube shed, carries out slip casting after steel tube shed installation；
Slip casting carries out tight filling with cement mortar to described steel tube shed after terminating.
4. mine tailings as claimed in claim 1 fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that adopting double
During the excavation method of the upper and lower pilot tunnel of side wall carries out tunnel trunk excavation, reserved rock beam and core in the middle part of described tunnel trunk
Cubsoil forms cross support, and described tunnel trunk cuts described cross support after the completion of excavating.
5. mine tailings as claimed in claim 4 fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that adopting double
Before the excavation method of the upper and lower pilot tunnel of side wall carries out tunnel trunk excavation, carry out region division to excavating region, including：
Described tunnel trunk is pressed upper left position, upper right Angle Position, lower right position and the lower-left Angle Position of its face
It is divided into the first pilot tunnel, the second pilot tunnel, the 3rd pilot tunnel and the 4th pilot tunnel；
Described cross support is divided into the 5th pilot tunnel positioned at the part between described first pilot tunnel and described 4th pilot tunnel；
Described cross support is divided into the 6th pilot tunnel positioned at the part between described second pilot tunnel and described 3rd pilot tunnel；
Described cross support is divided into the 7th pilot tunnel positioned at the part between described first pilot tunnel and described second pilot tunnel；
Described cross support is divided into the 8th pilot tunnel positioned at the part between described 3rd pilot tunnel and described 4th pilot tunnel；
Described cross support is led positioned at described 5th pilot tunnel, described 6th pilot tunnel, described 7th pilot tunnel and the described 8th
Part between hole is divided into the 9th pilot tunnel；
By described first pilot tunnel, described second pilot tunnel, described 3rd pilot tunnel, described 4th pilot tunnel, described 5th pilot tunnel, described
Six pilot tunnels, described 7th pilot tunnel, described 8th pilot tunnel and described 9th pilot tunnel are all divided into top bar and two regions of getting out of a predicament or an embarrassing situation.
6. mine tailings as claimed in claim 5 fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that described adopt
Carry out tunnel trunk with the excavation method of the upper and lower pilot tunnel of double side wall, including：
Excavate the top bar of described first pilot tunnel and the top bar of described second pilot tunnel, set up described first pilot tunnel top bar and
First structure in the range of the top bar of described second pilot tunnel；
Excavate getting out of a predicament or an embarrassing situation of described first pilot tunnel and getting out of a predicament or an embarrassing situation of described second pilot tunnel, set up described first pilot tunnel get out of a predicament or an embarrassing situation and
First structure in the range of the getting out of a predicament or an embarrassing situation of described second pilot tunnel；
Excavate the top bar of the top bar, the top bar of described 4th pilot tunnel and described 7th pilot tunnel of described 3rd pilot tunnel, frame
If first in the range of the top bar of described 3rd pilot tunnel, the top bar of described 4th pilot tunnel and the top bar of described 7th pilot tunnel
Prop up structure；
Excavate the getting out of a predicament or an embarrassing situation of described 3rd pilot tunnel, described 4th getting out of a predicament or an embarrassing situation of pilot tunnel and getting out of a predicament or an embarrassing situation of described 7th pilot tunnel, frame
If the getting out of a predicament or an embarrassing situation of described 3rd pilot tunnel, described 4th pilot tunnel get out of a predicament or an embarrassing situation and the getting out of a predicament or an embarrassing situation of described 7th pilot tunnel in the range of just
Prop up structure；
Excavate the top bar of described 5th pilot tunnel and the top bar of described 6th pilot tunnel, set up described 5th pilot tunnel top bar and
First structure in the range of the top bar of described 6th pilot tunnel；
Excavate described 5th getting out of a predicament or an embarrassing situation of pilot tunnel and getting out of a predicament or an embarrassing situation of described 6th pilot tunnel, set up described 5th pilot tunnel get out of a predicament or an embarrassing situation and
First structure in the range of the getting out of a predicament or an embarrassing situation of described 6th pilot tunnel；
Excavate the top bar of described 9th pilot tunnel, set up first structure in the range of the top bar of described 9th pilot tunnel；
Excavate getting out of a predicament or an embarrassing situation of described 9th pilot tunnel, set up first structure in the range of the getting out of a predicament or an embarrassing situation of described 9th pilot tunnel；
Excavate the top bar of described 8th pilot tunnel, set up first structure in the range of the top bar of described 8th pilot tunnel；
Excavate getting out of a predicament or an embarrassing situation of described 8th pilot tunnel, set up first structure in the range of the getting out of a predicament or an embarrassing situation of described 8th pilot tunnel.
7. mine tailings as claimed in claim 6 fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that described
After the completion of three pilot tunnels and described 4th pilot tunnel construction, excavate a use respectively in the front of described 3rd pilot tunnel and described 4th pilot tunnel
Auxiliary pilot tunnel in dregs transportation.
8. mine tailings as claimed in claim 7 fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that excavating institute
State auxiliary pilot tunnel, including：
Excavate auxiliary pilot tunnel set arch groove in the openings position of described auxiliary pilot tunnel；
Described set arch groove carries out assisting the construction of pilot tunnel set arch and auxiliary pilot tunnel steel tube shed；
Excavate and form described auxiliary pilot tunnel, set up first structure of described auxiliary pilot tunnel.
9. mine tailings as claimed in claim 6 fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that：
Described first pilot tunnel, described second pilot tunnel, described 3rd pilot tunnel, described 4th pilot tunnel, described 5th pilot tunnel, described
Six pilot tunnels, described 7th pilot tunnel, described 8th pilot tunnel and the respective top bar of described 9th pilot tunnel and be all provided between getting out of a predicament or an embarrassing situation
It is equipped with false stull to be separated；
Between described first pilot tunnel and described 5th pilot tunnel, between described 5th pilot tunnel and described 4th pilot tunnel, the described 7th
Between pilot tunnel and described 9th pilot tunnel, between described 9th pilot tunnel and described 8th pilot tunnel, described second pilot tunnel and the described 6th
Between pilot tunnel and it is provided with false stull between described 6th pilot tunnel and described 3rd pilot tunnel to be separated；
Between described first pilot tunnel and described 7th pilot tunnel, between described 7th pilot tunnel and described second pilot tunnel, the described 5th
Between pilot tunnel and described 9th pilot tunnel, between described 9th pilot tunnel and described 6th pilot tunnel, described 4th pilot tunnel and the described 8th
Between pilot tunnel and it is provided with interim mid-board between described 8th pilot tunnel and described 3rd pilot tunnel to be separated.
10. mine tailings as claimed in claim 9 fill out area's shallow buried covered excavation large-section tunnel construction method it is characterised in that described
Construction of waterproof layer and Second Lining Construction are carried out to described tunnel trunk, including：
The space of described 3rd pilot tunnel, the space of described 4th pilot tunnel and the space of described 8th pilot tunnel are divided into described tunnel
The inverted arch region of road barrel；
Remove the false stull in described inverted arch region and interim mid-board；
Set up full hall scaffold in described inverted arch region；
Construction of waterproof layer and Second Lining Construction are carried out to described inverted arch region；
By the space of described 5th pilot tunnel, the space of described 6th pilot tunnel, the space of described 9th pilot tunnel, described first pilot tunnel
The space got out of a predicament or an embarrassing situation in the space, the space got out of a predicament or an embarrassing situation of described second pilot tunnel and described 7th pilot tunnel got out of a predicament or an embarrassing situation is divided into
The arch wall region of described tunnel trunk；
Remove the false stull in described arch wall region and interim mid-board；
Set up full hall scaffold in described arch wall region；
Construction of waterproof layer and Second Lining Construction are carried out to described arch wall region；
By the space of the top bar of described first pilot tunnel, the space of the top bar of described second pilot tunnel and described 7th pilot tunnel
The space of top bar be divided into the crown area of described tunnel trunk；
Remove the false stull in described crown area and interim mid-board；
Set up full hall scaffold in described crown area；
Construction of waterproof layer and Second Lining Construction are carried out to described crown area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092254.5A CN104763435B (en) | 2015-03-02 | 2015-03-02 | Construction method of shallow-buried excavation type large cross section of tunnel in tail slag filling area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092254.5A CN104763435B (en) | 2015-03-02 | 2015-03-02 | Construction method of shallow-buried excavation type large cross section of tunnel in tail slag filling area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104763435A CN104763435A (en) | 2015-07-08 |
| CN104763435B true CN104763435B (en) | 2017-02-22 |
Family
ID=53645489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510092254.5A Active CN104763435B (en) | 2015-03-02 | 2015-03-02 | Construction method of shallow-buried excavation type large cross section of tunnel in tail slag filling area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104763435B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649651A (en) * | 2015-12-31 | 2016-06-08 | 中铁二十五局集团第五工程有限公司 | Construction method of secondary tunnel lining |
| CN105863648B (en) * | 2016-04-06 | 2018-04-10 | 中铁二十三局集团第二工程有限公司 | A kind of tunneling is shallow to cover large-section tunnel construction method |
| CN105987682A (en) * | 2016-05-30 | 2016-10-05 | 西安工业大学 | Test method for blast influence scope of existing underneath passing road of super-bury large-section tunnel |
| CN106499417B (en) * | 2016-10-25 | 2019-01-08 | 中铁隧道集团二处有限公司 | Extra-large cross-section resistant Capacity of Shallow-buried Subway Station reserves T word rock beam rock pillar construction |
| CN106437726B (en) * | 2016-11-02 | 2018-04-13 | 中铁二十局集团第五工程有限公司 | Shallow-depth-excavation tunnel crosses ground fissure crushed zone construction method |
| CN109209389B (en) * | 2018-08-17 | 2020-06-16 | 中铁十七局集团第三工程有限公司 | Construction method for entering semi-open and semi-closed tunnel |
| CN109339798B (en) * | 2018-10-19 | 2021-05-04 | 重庆大学 | Core soil removing method for improving tunnel double-side-wall pit guiding method construction |
| CN110645003B (en) * | 2019-10-17 | 2021-09-21 | 中铁二局集团有限公司 | Completely weathered granite bias steep slope tunnel entry construction method |
| CN112663625A (en) * | 2020-12-29 | 2021-04-16 | 哈尔滨工业大学 | Construction and protection method for shallow-buried bias-pressure weak surrounding rock tunnel portal in alpine region |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864960A (en) * | 2010-05-17 | 2010-10-20 | 中铁二十局集团有限公司 | Carst region double-arch road tunnel construction method |
| CN102562076A (en) * | 2011-12-23 | 2012-07-11 | 中铁十九局集团第五工程有限公司 | Underground excavation construction technology for large cross-section subway station under geological condition of soft upper layer and hard lower layer |
| CN102562075A (en) * | 2012-03-09 | 2012-07-11 | 中交第二公路工程局有限公司 | Large cross-section weak surrounding rock tunnel three-step and six-part short-distance construction method |
| CN103016029A (en) * | 2012-12-28 | 2013-04-03 | 成都中铁隆工程集团有限公司 | Grouped second liner construction method for large cross-section tunnel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08170484A (en) * | 1994-12-19 | 1996-07-02 | Shimizu Corp | Construction method of large cross section tunnel |
-
2015
- 2015-03-02 CN CN201510092254.5A patent/CN104763435B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864960A (en) * | 2010-05-17 | 2010-10-20 | 中铁二十局集团有限公司 | Carst region double-arch road tunnel construction method |
| CN102562076A (en) * | 2011-12-23 | 2012-07-11 | 中铁十九局集团第五工程有限公司 | Underground excavation construction technology for large cross-section subway station under geological condition of soft upper layer and hard lower layer |
| CN102562075A (en) * | 2012-03-09 | 2012-07-11 | 中交第二公路工程局有限公司 | Large cross-section weak surrounding rock tunnel three-step and six-part short-distance construction method |
| CN103016029A (en) * | 2012-12-28 | 2013-04-03 | 成都中铁隆工程集团有限公司 | Grouped second liner construction method for large cross-section tunnel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104763435A (en) | 2015-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104763435B (en) | Construction method of shallow-buried excavation type large cross section of tunnel in tail slag filling area | |
| CN111075454B (en) | Double-arch tunnel five-hole excavation method | |
| CN106907159B (en) | Shallow-buried underground excavation subway station separated open type structure and construction method thereof | |
| CN109026064B (en) | Construction method for large-span multi-arch tunnel with semi-bright and semi-dark | |
| CN205742213U (en) | Foundation pit supporting construction | |
| CN112127900B (en) | Construction method for hidden half-wall and half-arch protection structure of exposed arch of shallow-buried bias tunnel penetrating through accumulation body | |
| CN101864960A (en) | Carst region double-arch road tunnel construction method | |
| CN104818991A (en) | Construction method of residual slope wash tunnel with shallow cover and unsymmetrical pressure | |
| CN104989425B (en) | A kind of tunneling is into hole supporting construction and its method for protecting support | |
| CN102606162A (en) | Quick construction method for weak surrounding rock shallowly-buried easily-collapsed area of tunnel | |
| CN110056369A (en) | A kind of construction method at tunnel's entrance and exit hole | |
| CN108457656A (en) | A kind of unearthed method for tunnel construction | |
| CN106498950A (en) | Anchor head is placed in the Pile-Anchor Supporting for Deep Excavation system and its implementation of pile body | |
| CN109538246A (en) | Ledge method tunneling subway station arch springing ruggedized construction and construction method | |
| CN110159298A (en) | A kind of first branch button arch construction method of Underground Subway Station | |
| CN111502696A (en) | Dense-mesh type advanced support system of underground excavation tunnel and construction method | |
| CN111560962A (en) | Backfill area foundation pit supporting structure and construction method thereof | |
| CN105863650A (en) | Tunneling construction method with first wall construction and second tunneling construction | |
| CN112663625A (en) | Construction and protection method for shallow-buried bias-pressure weak surrounding rock tunnel portal in alpine region | |
| CN109736827A (en) | The method that city underground ground consisting of hard rock service channel high pressure gas expansion fracturing is excavated | |
| CN107503755A (en) | A kind of construction method for exempting from button arch flat-top cavern-pile method construction subway station | |
| CN108843341A (en) | A kind of the cut-and-cover tunnel structure and its construction method of mixture of piles and concrete wall formula | |
| CN104631440A (en) | Stiffening core lengthening foundation pit support structure for existing large-diameter bored concrete pile and construction method | |
| CN206408630U (en) | Anchor head is placed in the Pile-Anchor Supporting for Deep Excavation system of pile body | |
| CN107288665A (en) | The construction method of Station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |