CN209195412U - A kind of tunnel structure suitable for weak Facility-sliding strata - Google Patents
A kind of tunnel structure suitable for weak Facility-sliding strata Download PDFInfo
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- CN209195412U CN209195412U CN201822109530.6U CN201822109530U CN209195412U CN 209195412 U CN209195412 U CN 209195412U CN 201822109530 U CN201822109530 U CN 201822109530U CN 209195412 U CN209195412 U CN 209195412U
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Abstract
The utility model discloses a kind of tunnel structures suitable for weak Facility-sliding strata, including the two rows of anchor piles being equipped in tunnel portal, the joist being equipped on every row's anchor pile, and the lid being connected between two joists, and backfill stone is backfilled at the top of lid, anchor pile passes through the surface layer soft rock at hole and is embedded in lower layer's basement rock.The anchor pile of the utility model passes through surface layer soft rock and is embedded in lower layer's basement rock, is effective against the skid force of two sides side slope, improves formation strength；Lid is performed at hole, solves the problems, such as that hole face-upward slope slump influences staff's construction safety；Different height soil stone is backfilled according to soft rock range at the top of lid, back-pressure is formed to slope soft rock is faced upward, can effectively ensure that the stability for facing upward slope and side slope.
Description
Technical field
The utility model relates to technical field of tunnel construction, in particular to a kind of tunnel suitable for weak Facility-sliding strata into
Hole structure.
Background technique
Weak Facility-sliding strata is that surface layer is soft rock, and lower layer is the geological stratification of basement rock, is normally at mountain area, and this geological stratification is special
Sign is exactly that the surface layer soft rock is easily generated along Weak face by external force (such as earthquake, heavy rain, mud-rock flow or other perturbed forces act on)
The phenomenon that displacement slides out existing collapsing.Therefore, when tunnel portal is located in soft rock, when the start tunneling of hole, soft rock is being applied
Under the external factor such as infiltration act under work disturbance and under surface rain, easily there is the sliding of soft rock and cause Landslide, jeopardize tunnel
Road safe construction.
For this purpose, Design of Tunnel Portal is both needed to carry out brush slope to face-upward slope under normal circumstances, if without other reinforcement measures, side
It is relatively slow to face upward slope ratio of slope, brush slope range is larger.In soft rock entrance construction, face-upward slope brush slope range is big, after face-upward slope excavates, is formed
Biggish free face, the unloading of face-upward slope slope foot；The loose lower layer in soft rock upper layer is closely knit, and surface water easily permeates softening country rock；In synthesis
Outer two kinds of factors easily cause face-upward slope to generate displacement along weak bedding surface, cause slope instability, and form tunnel portal and apply into hole
The pattern of work difficulty, constructing tunnel duration are even more to be difficult to control.
Utility model content
The purpose of the utility model is to overcome the above-mentioned deficiencies in the presence of the prior art, provide a kind of suitable for weakness
The tunnel structure of Facility-sliding strata.
In order to achieve the above-mentioned object of the invention, the utility model provides following technical scheme:
A kind of tunnel structure suitable for weak Facility-sliding strata, including the two rows of anchor piles being equipped in tunnel portal,
The joist being equipped on every row's anchor pile, and the lid being connected between two joists, and returned at the top of the lid
It is filled with backfill stone, the anchor pile passes through the surface layer soft rock at hole and is embedded in lower layer's basement rock.
Tunnel structure described in the utility model is different from existing bright positioned at the outside of tunnel portal
Hole structure, guiding wall construction etc., tunnel structure described in the utility model primarily serves protective action, to guarantee construction peace
Entirely.Specifically, anchor pile passes through surface layer soft rock and is embedded in lower layer's basement rock, it is effective against the skid force of two sides side slope, is mentioned simultaneously
The intensity on high stratum；Lid is performed at hole, efficiently solving hole face-upward slope slump influences asking for staff's construction safety
Topic, ensure that construction safety；Further, different height soil stone is backfilled according to soft rock range at the top of lid, to facing upward slope soft rock
Back-pressure is formed, can effectively ensure that the stability for facing upward slope and side slope.The utility model is since equipment is simple, place is easy to arrange, has
Conducive to stablizing weak Facility-sliding strata, reducing the features such as construction risk, preferable economic benefit is formd.
Preferably, the lid is domes, at this point, the size of lid can be roughly the same with the guiding size of wall,
Lid is directly connected with guiding wall, forms overall structure, facilitates construction.Certainly, lid is also possible to other shapes, such as slot
The material of type, rectangle etc., lid is also unlimited, as long as can play the role of rock-fall protection.
Preferably, the anchor pile, joist and lid are reinforced concrete structure, and the position that is connected is connect by reinforcing bar
Stubble is connected, easy for construction, and bonding strength is high, and durability is good.
Preferably, further include face upward slope and with the safeguard structure and drainage system facing upward the adjacent side slope in slope and being equipped with.
The drainage system mainly includes performing earth's surface drain dyke, and the construction of drainage system carries out at first, and the purpose is to reduce
Extraneous factor is to the influence to hole face-upward slope soft rock stability.The safeguard structure includes rotary churning pile and/or anchored pile, and/
Or steel floral tube and/or steel tube shed, safeguard structure can effectively stable face-upward slope, avoid face-upward slope stability failure and slide and influence tunnel and apply
Work safety.
The invention also discloses a kind of construction methods of tunnel structure suitable for weak Facility-sliding strata, such as appoint
A kind of tunnel structure suitable for weak Facility-sliding strata described in one, construction method the following steps are included:
Step 1: two rows of anchor piles, including pore digging and protection, pile body reinforcement fabrication and peace are performed in tunnel portal
Dress and pour stake body by concrete；
Step 2: after the anchor pile reaches design strength, joist is performed at the top of every row's anchor pile, to the support
After the completion of beam construction, lid is performed between two joists；
Step 3: after the lid reaches design strength, backfill stone is backfilled at the top of lid.
Potential slide surface is truncated by anchor pile in the utility model, and open cut tunnel and back-pressure backfill are stablized the method for facing upward slope, guaranteed
The stability of the easy gliding mass of hole soft rock.Technology construction feasibility is high, using conventional construction equipment it is achieved that than passing
The excavation of system shifted to an earlier date into the hole mode duration, and unit in charge of construction can be with effectively save manpower and material resources.It is effectively reduced using the technology
The depth and width of tunnel excavation can reduce about 40% land area compared with traditional slope is excavated, and total investment can
Control, can effectively estimate investment.
Preferably, before the step 1, earth's surface drain dyke is first performed, and perform on facing upward slope and/or side slope
Rotary churning pile or anchored pile or steel floral tube, the rotary churning pile or anchored pile or steel floral tube pass through surface layer soft rock and are embedded in lower layer's basement rock.
It preferably, further include performing guiding wall and steel tube shed before backfilling backfill stone, the basis of the guiding wall is set
It is placed on the joist, prevents guiding wall from sinking, after the completion of subject-oriented wall applies, the guiding wall wall aperture applies described
Steel tube shed advance support.
Preferably, performing joist includes joist template construct and installation, joist reinforcement fabrication and installation and joist concrete
It pours；Performing lid includes lid template construct and installation, lid reinforcement fabrication and installation, and maintenance detection.
It preferably, further include that tunneling section, the first step are excavated to the anchoring stake top in two steps at open cut tunnel hole
Elevation location, after the lid construction after the completion of, second step excavate be from it is described anchoring stake top elevation location be excavated to
Tunnel bottom elevation location.In this way, excavation height can be effectively controlled, small to the disturbance of easy sliding bottom, excavation is small, securely and reliably.
Compared with prior art, it is described in the utility model into hole structure the utility model has the advantages that
The anchor pile of the utility model passes through surface layer soft rock and is embedded in lower layer's basement rock, is effective against the sliding of two sides side slope
Power, while improving the intensity on stratum；Lid is performed at hole, efficiently solving hole face-upward slope slump influences staff's construction
The problem of safety, ensure that construction safety；Further, different height soil stone is backfilled according to soft rock range at the top of lid, it is right
It faces upward slope soft rock and forms back-pressure, can effectively ensure that the stability for facing upward slope and side slope.The utility model is since equipment is simple, place is easy to
It arranges, is conducive to stablize weak Facility-sliding strata, reduces the features such as construction risk, form preferable economic benefit.
Compared with prior art, the construction method described in the utility model into hole structure the utility model has the advantages that
Potential slide surface is truncated by anchor pile in the utility model, and open cut tunnel and back-pressure backfill are stablized the method for facing upward slope, guaranteed
The stability of the easy gliding mass of hole soft rock.Technology construction feasibility is high, using conventional construction equipment it is achieved that than passing
The excavation of system shifted to an earlier date into the hole mode duration, and unit in charge of construction can be with effectively save manpower and material resources.It is effectively reduced using the technology
The depth and width of tunnel excavation can reduce about 40% land area compared with traditional slope is excavated, and total investment can
Control, can effectively estimate investment.
Detailed description of the invention:
Fig. 1 is that a kind of tunnel structure suitable for weak Facility-sliding strata described in the utility model (conceals backfill
Native stone) structural schematic diagram.
Fig. 2 be it is described in the utility model it is a kind of suitable for weak Facility-sliding strata tunnel structure (including guiding wall
And steel tube shed) structural schematic diagram.
Fig. 3 is the structural schematic diagram of guiding wall and steel tube shed described in the utility model.
Marked in the figure: 1- anchor pile, 2- joist, 3- lid, 4- backfill stone, 5- guiding wall, 6- steel tube shed, the tunnel 7-,
01- faces upward slope, 02- side slope, the surface layer 03- soft rock, 04- lower layer basement rock.
Specific embodiment
The utility model is described in further detail below with reference to test example and specific embodiment.But it should not be by this
The range for being interpreted as the above-mentioned theme of the utility model is only limitted to embodiment below, all to be realized based on the content of the present invention
Technology belongs to the scope of the utility model.
Embodiment 1
As Figure 1-Figure 2, a kind of tunnel structure suitable for weak Facility-sliding strata, is included in tunnel portal and is equipped with
Two rows of anchor piles 1, the joist 2 being equipped on every row's anchor pile 1, and the arch that is connected between two joists 2
Lid 3, and backfill stone 4 is backfilled at the top of the lid 3, the anchor pile 1 passes through the surface layer soft rock 03 at hole and is embedded in
Lower layer's basement rock 04.The anchor pile 1, joist 2 and lid 3 are reinforced concrete structure, and the position that is connected is connect by reinforcing bar
Stubble is connected.
It further include in the safeguard structure for facing upward slope 01 and side slope 02 is equipped with, specifically, slope 01 can faced upward and side slope 02 carries out
Rotary churning pile carries out the above-mentioned construction into hole structure after reinforcing again, to guarantee construction safety.Meanwhile as shown in figure 3, in order to smoothly
Tunneling 7, the safeguard structure further include the guiding wall 5 and steel tube shed 6 being equipped in the penumbra in tunnel 7, are played super
The effect of preceding supporting, guiding 5 basis of wall are placed on the joist 2, are provided vertical counter-force for guiding wall 5, are reduced sedimentation, be oriented to wall
Open cut tunnel is closely followed at 5 rears, provides horizontal direction counter-force for guiding wall 5, reduces the outside extrusion displacement of guiding wall 5.
In the construction process, the shape of lid 3 can be similar with guiding wall 5, and lid 3 can directly withstand on guiding wall 5
On, or can be connected by reinforcing bar therebetween, then cast-in-place integral.After the completion of lid 3 and guiding wall 5 are constructed,
Again in the top backfill stone and concrete of lid 3 and guiding wall 5, backfill stone 4 forms back-pressure to slope soft rock is faced upward, so as to have
Effect guarantees to face upward the stability on slope.
Embodiment 2
A kind of construction method of the tunnel structure suitable for weak Facility-sliding strata, comprising the following steps:
Step 1: preparation of construction, including earth's surface drain dyke is performed, to reduce extraneous factor to hole face-upward slope soft rock
The influence of stability, to slope 01 is faced upward and side slope 02 is reinforced, specifically, surface layer can be fixed by rotary churning pile or steel-pipe pile
Soft rock 03.
Step 2: two rows of anchor piles 1, including pore digging and protection, pile body reinforcing bar system are performed in the earth's surface of tunnel portal
Work and installation and pour stake body by concrete.Pile foundation uses diameter for the drilled pile of 1.5m, the long thickness according to surface layer soft rock 03 of stake
Degree is drafted, stake spacing 4.5m.It is protected between stake using soil nail wall, soil nail wall is set between each stake, soil nail wall metope uses C35 reinforcing bar
Concreting, wall high 3~4m laterally use 3 column soil nailings between stake, be anyhow 1.0m, soil nailing bore diameter 32mm to spacing,
Soil nail wall metope ratio of slope 1: 0.2,11.31 ° of soil nailing angle with horizontal plane, soil-nail parameter 10m.
Step 3: after the anchor pile 1 reaches design strength, performing joist 2 at the top of every row's anchor pile 1 respectively,
Including joist template construct and installation, joist reinforcement fabrication and installation and joist concreting, 2 sectional dimension 1.5m of joist
The bound fraction reinforcing bar of × 1.5m, mono- section of every 8m, the outer cantilever 1m of pile foundation, joist 2 and anchor pile 1 connects stubble.
Step 4: after the completion of pile foundation joist 2 applies, lid 3 is applied between two joists 2, lid 3 is mixed using reinforcing bar
Xtah Crude Clay structure performs lid 3 and includes lid template construct and installation, lid reinforcement fabrication and installation, and maintenance detection, lid 3
Thickness 80cm, be placed on joist 2 and connect stubble in binding site reinforcing bar.
Step 5: after the lid 3 reaches design strength, backfill stone 4 and C20 coagulation are backfilled at the top of lid 3
Soil after Tunnel slope protection, faces upward slope back-pressure and carries out on tunnel 7 half section excavation again after the completion of earth's surface reinforcing applies and apply into hole
Work.In open cut tunnel hole tunneling section in two steps, the first step is excavated to elevation location (and the dark hole of 1 stake top of anchor pile
Top bar it is similar), second step excavation be to be excavated to tunnel bottom elevation location from the elevation location of 1 stake top of anchor pile
(similar with getting out of a predicament or an embarrassing situation for dark hole).Excavating in two steps can be effectively controlled excavation height, small to the disturbance of easy sliding bottom, and excavation is small,
Securely and reliably.
The construction of guiding wall 5 and steel tube shed 6 can be carried out while performing anchor pile 1, joist 2 and lid 3, it is described to lead
To wall 5 basis instrument on the joist 2, the 5 wall aperture of guiding wall applies the steel tube shed 6, advanced to play
The effect of supporting lays the foundation for the smooth excavation in tunnel, finally native stone backfill is carried out in guiding wall and lid 3 again, to rise
To the effect for facing upward slope back-pressure.
Above embodiments are only to illustrate the utility model and not limit technical solution described in the utility model, to the greatest extent
Pipe this specification has been carried out detailed description to the utility model referring to above-mentioned each embodiment, but the utility model not office
It is limited to above-mentioned specific embodiment, therefore any pair of the utility model is modified or equivalent replacement；And all do not depart from it is practical
The technical solution and its improvement of novel spirit and scope, should all cover in the scope of the claims of the utility model.
Claims (6)
1. a kind of tunnel structure suitable for weak Facility-sliding strata, which is characterized in that including be equipped in tunnel portal two
It arranges anchor pile (1), the joist (2) being equipped on every row's anchor pile (1), and the lid being connected between two joists (2)
Body (3), and be backfilled with backfill stone (4) at the top of the lid (3), the anchor pile (1) passes through the surface layer soft rock at hole
(03) and it is embedded in lower layer's basement rock (04).
2. a kind of tunnel structure suitable for weak Facility-sliding strata according to claim 1, which is characterized in that described
Lid (3) is domes.
3. a kind of tunnel structure suitable for weak Facility-sliding strata according to claim 1, which is characterized in that described
Anchor pile (1), joist (2) and lid (3) are reinforced concrete structure, and the position that is connected connects stubble by reinforcing bar and is connected.
4. a kind of tunnel structure suitable for weak Facility-sliding strata according to claim 1 to 3, feature exist
In further including in the safeguard structure facing upward slope (01) and being equipped with.
5. a kind of tunnel structure suitable for weak Facility-sliding strata according to claim 4, which is characterized in that described
Safeguard structure includes rotary churning pile and/or anchored pile and/or steel floral tube and/or steel tube shed.
6. a kind of tunnel structure suitable for weak Facility-sliding strata according to claim 4, which is characterized in that with
Described face upward also is provided with the safeguard structure in the adjacent side slope (02) in slope (01).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822109530.6U CN209195412U (en) | 2018-12-14 | 2018-12-14 | A kind of tunnel structure suitable for weak Facility-sliding strata |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822109530.6U CN209195412U (en) | 2018-12-14 | 2018-12-14 | A kind of tunnel structure suitable for weak Facility-sliding strata |
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| CN209195412U true CN209195412U (en) | 2019-08-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441456A (en) * | 2018-12-14 | 2019-03-08 | 中铁二院工程集团有限责任公司 | A kind of the tunnel structure and its construction method of weakness Facility-sliding strata |
| CN110985057A (en) * | 2019-12-25 | 2020-04-10 | 云南交投公路建设第四工程有限公司 | Construction method for tunneling hidden excavation and hole entering under combined advanced support of cover beam and pipe shed |
-
2018
- 2018-12-14 CN CN201822109530.6U patent/CN209195412U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441456A (en) * | 2018-12-14 | 2019-03-08 | 中铁二院工程集团有限责任公司 | A kind of the tunnel structure and its construction method of weakness Facility-sliding strata |
| CN109441456B (en) * | 2018-12-14 | 2024-04-09 | 中铁二院工程集团有限责任公司 | Tunnel entering structure of weak and slippery stratum and construction method thereof |
| CN110985057A (en) * | 2019-12-25 | 2020-04-10 | 云南交投公路建设第四工程有限公司 | Construction method for tunneling hidden excavation and hole entering under combined advanced support of cover beam and pipe shed |
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