CN112392517B - Tunnel tree root type tunnel bottom structure and construction method thereof - Google Patents
Tunnel tree root type tunnel bottom structure and construction method thereof Download PDFInfo
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- CN112392517B CN112392517B CN202110064318.6A CN202110064318A CN112392517B CN 112392517 B CN112392517 B CN 112392517B CN 202110064318 A CN202110064318 A CN 202110064318A CN 112392517 B CN112392517 B CN 112392517B
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- 238000010276 construction Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 35
- 239000010410 layer Substances 0.000 claims description 145
- 239000011241 protective layer Substances 0.000 claims description 61
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 11
- 239000010865 sewage Substances 0.000 abstract description 3
- 101150097977 arch-1 gene Proteins 0.000 description 46
- 230000003014 reinforcing effect Effects 0.000 description 8
- 238000005086 pumping Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 208000037921 secondary disease Diseases 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- General Life Sciences & Earth Sciences (AREA)
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- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of railway construction, in particular to a tunnel tree root type tunnel bottom structure and a construction method thereof, wherein the tunnel tree root type tunnel bottom structure comprises the following steps: the tunnel inverted arch, the outer circumferential reinforcing steel bar, the connecting plate, the drain pipe, the first connecting rod and the anti-pulling anchor rod are arranged under the tunnel inverted arch, the drain pipe and the connecting plate are connected together by the first connecting rod, finally the connecting plate is fixedly connected onto the outer circumferential reinforcing steel bar, the reserved joint is arranged above the drain pipe and can be connected with the first connecting rod, the drain pipe provides downward tension for the outer circumferential reinforcing steel bar, so that the outer circumferential reinforcing steel bar also provides downward pressure for the tunnel inverted arch, the anti-pulling anchor rod is used and also provides downward tension for the outer circumferential reinforcing steel bar, and further, the tunnel bottom is prevented from bulging due to soft rock or expansive rock, the drain pipe is arranged below the tunnel inverted arch, water of a side ditch is guided into the drain pipe, sewage is discharged quickly, the probability of tunnel bulging is reduced, and accidents are prevented.
Description
Technical Field
The invention relates to the technical field of railway construction, in particular to a tunnel tree root type tunnel bottom structure and a construction method thereof.
Background
A large number of tunnel bottom diseases of railway tunnels in China include slurry pumping, tunnel bottom swelling, tunnel bottom frost heaving and the like, one of the pathogenic reasons is that accumulated water at the bottom of the tunnel is caused by the fact that a tunnel water-proof and drainage system fails, and severe challenges are brought to the operation safety of railways and subways in China. The accumulated water at the bottom of the tunnel can not only cause the uplift at the bottom of the tunnel to destroy the bottom structure of the tunnel, but also can cause a series of secondary diseases such as deformation of a track bed, mud pumping during slurry turning, structural damage of a lining and the like. Safety accidents such as derailment can be caused; the tunnel bottom is damaged due to the rise of the tunnel bottom, so that a plurality of secondary diseases such as slurry turning, mud pumping and the like are caused; thirdly, the tunnel bottom is raised to cause overlarge deformation of the lining, even damage to the lining, and in severe cases, instability of the tunnel and collapse of surrounding rocks are possibly caused, so that great threats exist on construction safety during construction and driving safety during operation.
Disclosure of Invention
The invention aims to provide a tunnel root type tunnel bottom structure and a construction method thereof, which aim to solve the problems. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
in one aspect, the application provides a root formula tunnel bottom structure is treegarded in tunnel, include: the tunnel inverted arch is arranged at the bottom of the tunnel; the outer layer circumferential steel bars are arranged above the tunnel inverted arch and are perpendicular to the tunnel inverted arch; the connecting plate is fixedly arranged at the top end of the outer layer annular reinforcing steel bar; the drain pipe is arranged right below the vertical line of the tunnel inverted arch, and a reserved joint is arranged on the drain pipe; the first connecting rod is arranged between the connecting plate and the drain pipe, the top end of the first connecting rod is fixedly connected with the connecting plate, and the bottom end of the first connecting rod is fixedly connected with the reserved joint; the anti-pulling anchor rod is provided with many, many the upper end of anti-pulling anchor rod with outer hoop reinforcing bar links to each other, many the bottom and the first protective layer of anti-pulling anchor rod link to each other.
Optionally, a waterproof layer is arranged under the drain pipe, the waterproof layer is arc-shaped, and the radian of the waterproof layer is the same as that of the tunnel inverted arch.
Optionally, the waterproof layer is provided with a primary supporting concrete layer, a non-woven fabric layer and an EVA waterproof board layer from outside to inside in sequence.
Optionally, first protective layer sets up the waterproof layer with between the tunnel invert, just first protective layer parcel drain pipe bottom, the top of first protective layer with the tunnel invert links to each other, the bottom of first protective layer with the waterproof layer links to each other, both ends all inwards incline the setting about first protective layer, just both ends perpendicular to about first protective layer the tangent line of tunnel invert.
Optionally, a water guide pipe is arranged in the first protective layer, one end of the water guide pipe is connected with the water discharge pipe, the other end of the water guide pipe is connected with the bottom of the side ditch, and filter screens are arranged at ports of two ends of the water guide pipe.
Optionally, a second protective layer is arranged above the first protective layer, the second protective layer is fixedly connected with the first protective layer through a second connecting rod, and the first protective layer and the second protective layer are wrapped outside the drain pipe.
Optionally, a clamping block is arranged between the second protective layer and the tunnel inverted arch, and the first connecting rod penetrates through the clamping block to connect the connecting plate and the drain pipe.
On the other hand, the application provides a construction method of a tunnel root type tunnel bottom structure, which comprises the following steps: digging a foundation pit and laying a waterproof layer; pre-burying a drain pipe above the waterproof layer, connecting a first connecting rod with a reserved joint of the drain pipe, laying water guide pipes on two sides of the drain pipe, and respectively connecting two ends of each water guide pipe with the drain pipe and a side ditch; pouring a first protective layer, completely wrapping the aqueduct, embedding a second connecting rod and an uplift anchor rod in the first protective layer, pouring a second protective layer above the drain pipe, and completely wrapping the second connecting rod by the poured second protective layer; and then, pouring a clamping block, erecting outer-layer circumferential reinforcing steel bars, fixing the anti-pulling anchor rod at the bottom of the outer-layer circumferential reinforcing steel bars, fixedly arranging a connecting plate on the outer-layer circumferential reinforcing steel bars, fixedly connecting the connecting plate with the first connecting rod, and pouring the tunnel inverted arch.
The invention has the beneficial effects that:
the invention arranges the drain pipe under the tunnel inverted arch, then connects the drain pipe and the connecting plate together through the first connecting rod, finally fixedly connects the connecting plate to the outer layer circumferential reinforcing steel bar, because the outer layer circumferential reinforcing steel bar is arranged above the tunnel inverted arch and the reserved joint is arranged above the drain pipe, the first connecting rod can be conveniently and quickly connected, and because the drain pipe provides a downward pulling force for the outer layer circumferential reinforcing steel bar, the outer layer circumferential reinforcing steel bar also provides a downward pressure for the tunnel inverted arch, in addition, the invention uses the anti-pulling anchor rod to also give a downward pulling force to the annular reinforcing steel bar at the outer layer, and then prevent at the bottom of the tunnel because soft rock or inflation rock and the uplift appears, set up the drain pipe below the tunnel invert, with the leading-in drain pipe of the water of side ditch in, the sewage of discharging fast reduces the probability that takes place the tunnel uplift, protection train operation environment.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic plan view of a root-type tunnel bottom structure of a tunnel according to an embodiment of the present invention;
fig. 2 is an enlarged schematic view of a point a in fig. 1.
The labels in the figure are: 1. a tunnel inverted arch; 2. outer layer circumferential reinforcing steel bars; 3. a connecting plate; 4. a first connecting rod; 5. a drain pipe; 6. a waterproof layer; 7. a first protective layer; 8. a water conduit; 9. side ditches; 10. a second protective layer; 11. a second connecting rod; 12. anti-pulling anchor rods; 13. and (7) clamping blocks.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Example 1
As shown in fig. 1 and fig. 2, the present embodiment provides a root-type tunnel bottom structure of a tunnel tree, including: the tunnel inverted arch structure comprises a tunnel inverted arch 1, outer-layer circumferential steel bars 2, a connecting plate 3, a drain pipe 5, a first connecting rod 4 and an anti-pulling anchor rod 12, wherein the tunnel inverted arch 1 is arranged at the bottom of the tunnel; the outer-layer circumferential steel bars 2 are arranged above the tunnel inverted arch 1, and the outer-layer circumferential steel bars 2 are perpendicular to the tunnel inverted arch 1; the connecting plate 3 is fixedly arranged at the top end of the outer layer annular reinforcing steel bar 2; the drain pipe 5 is arranged right below the perpendicular bisector of the tunnel inverted arch 1, and a reserved joint is arranged on the drain pipe 5; the first connecting rod 4 is arranged between the connecting plate 3 and the drain pipe 5, the top end of the first connecting rod 4 is fixedly connected with the connecting plate 3, and the bottom end of the first connecting rod 4 is fixedly connected with the reserved joint; resistance to plucking stock 12 is provided with many, many the upper end of resistance to plucking stock 12 with outer hoop reinforcing bar 2 links to each other, many the bottom and the first protective layer 7 of resistance to plucking stock 12 link to each other.
In the embodiment of the invention, the drain pipe is arranged under the tunnel invert 1, the drain pipe 5 is connected with the connecting plate 3 through the first connecting rod 4, finally the connecting plate 3 is fixedly connected to the outer layer circumferential reinforcing steel bar 2, the outer layer circumferential reinforcing steel bar 2 is arranged above the tunnel invert 1, the reserved joint is arranged above the drain pipe 5, the first connecting rod 4 can be conveniently and quickly connected, the outer layer circumferential reinforcing steel bar 2 also provides downward pressure for the tunnel invert 1 due to the downward tension of the outer layer circumferential reinforcing steel bar 2 by the drain pipe 5, the anti-pulling anchor rod 12 is used, the downward tension is also provided for the outer layer circumferential reinforcing steel bar 2, the tunnel bottom is prevented from being raised due to soft rock or expansive rock, the drain pipe 5 is arranged below the tunnel invert 1, water in a lateral ditch is guided into the drain pipe 5, and sewage is quickly discharged, the probability of tunnel uplift is reduced, and the train operation environment is protected.
Example 2
As shown in fig. 1 and fig. 2, the present embodiment provides a root-type tunnel bottom structure of a tunnel tree, including: the tunnel inverted arch structure comprises a tunnel inverted arch 1, outer-layer circumferential steel bars 2, a connecting plate 3, a drain pipe 5, a first connecting rod 4 and an anti-pulling anchor rod 12, wherein the tunnel inverted arch 1 is arranged at the bottom of the tunnel; the outer-layer circumferential steel bars 2 are arranged above the tunnel inverted arch 1, and the outer-layer circumferential steel bars 2 are perpendicular to the tunnel inverted arch 1; the connecting plate 3 is fixedly arranged at the top end of the outer layer annular reinforcing steel bar 2; the drain pipe 5 is arranged right below the perpendicular bisector of the tunnel inverted arch 1, and a reserved joint is arranged on the drain pipe 5; the first connecting rod 4 is arranged between the connecting plate 3 and the drain pipe 5, the top end of the first connecting rod 4 is fixedly connected with the connecting plate 3, and the bottom end of the first connecting rod 4 is fixedly connected with the reserved joint; resistance to plucking stock 12 is provided with many, many the upper end of resistance to plucking stock 12 with outer hoop reinforcing bar 2 links to each other, many the bottom and the first protective layer 7 of resistance to plucking stock 12 link to each other.
A waterproof layer 6 is arranged under the drain pipe 5, the waterproof layer 6 is arc-shaped, and the radian of the waterproof layer 6 is the same as that of the tunnel inverted arch 1.
According to the embodiment of the invention, the waterproof layer 6 is arranged to prevent the underground water from permeating into the bottom of the tunnel, so that the tunnel is prevented from bulging due to overlarge pressure of the underground water. And because the waterproof layer 6 is the same as the tunnel inverted arch 1 in structure and is arc-shaped, the tunnel inverted arch can bear larger pressure.
Example 3
As shown in fig. 1 and fig. 2, the present embodiment provides a root-type tunnel bottom structure of a tunnel tree, including: the tunnel inverted arch structure comprises a tunnel inverted arch 1, outer-layer circumferential steel bars 2, a connecting plate 3, a drain pipe 5, a first connecting rod 4 and an anti-pulling anchor rod 12, wherein the tunnel inverted arch 1 is arranged at the bottom of the tunnel; the outer-layer circumferential steel bars 2 are arranged above the tunnel inverted arch 1, and the outer-layer circumferential steel bars 2 are perpendicular to the tunnel inverted arch 1; the connecting plate 3 is fixedly arranged at the top end of the outer layer annular reinforcing steel bar 2; the drain pipe 5 is arranged right below the perpendicular bisector of the tunnel inverted arch 1, and a reserved joint is arranged on the drain pipe 5; the first connecting rod 4 is arranged between the connecting plate 3 and the drain pipe 5, the top end of the first connecting rod 4 is fixedly connected with the connecting plate 3, and the bottom end of the first connecting rod 4 is fixedly connected with the reserved joint; resistance to plucking stock 12 is provided with many, many the upper end of resistance to plucking stock 12 with outer hoop reinforcing bar 2 links to each other, many the bottom and the first protective layer 7 of resistance to plucking stock 12 link to each other.
A waterproof layer 6 is arranged under the drain pipe 5, the waterproof layer 6 is arc-shaped, and the radian of the waterproof layer 6 is the same as that of the tunnel inverted arch 1.
The waterproof layer 6 is provided with a primary support concrete layer, a non-woven fabric layer and an EVA waterproof board layer from outside to inside in sequence.
According to the embodiment of the invention, underground water is prevented from permeating into the bottom of the tunnel through various waterproof materials, water accumulation at the bottom of the tunnel is prevented, and risks of slurry turning, mud pumping and bulging of the bottom of the tunnel are reduced.
Example 4
As shown in fig. 1 and fig. 2, the present embodiment provides a root-type tunnel bottom structure of a tunnel tree, including: the tunnel inverted arch structure comprises a tunnel inverted arch 1, outer-layer circumferential steel bars 2, a connecting plate 3, a drain pipe 5, a first connecting rod 4 and an anti-pulling anchor rod 12, wherein the tunnel inverted arch 1 is arranged at the bottom of the tunnel; the outer-layer circumferential steel bars 2 are arranged above the tunnel inverted arch 1, and the outer-layer circumferential steel bars 2 are perpendicular to the tunnel inverted arch 1; the connecting plate 3 is fixedly arranged at the top end of the outer layer annular reinforcing steel bar 2; the drain pipe 5 is arranged right below the perpendicular bisector of the tunnel inverted arch 1, and a reserved joint is arranged on the drain pipe 5; the first connecting rod 4 is arranged between the connecting plate 3 and the drain pipe 5, the top end of the first connecting rod 4 is fixedly connected with the connecting plate 3, and the bottom end of the first connecting rod 4 is fixedly connected with the reserved joint; resistance to plucking stock 12 is provided with many, many the upper end of resistance to plucking stock 12 with outer hoop reinforcing bar 2 links to each other, many the bottom and the first protective layer 7 of resistance to plucking stock 12 link to each other.
A waterproof layer 6 is arranged under the drain pipe 5, the waterproof layer 6 is arc-shaped, and the radian of the waterproof layer 6 is the same as that of the tunnel inverted arch 1.
According to the embodiment of the invention, the first protection layer 7 is arranged to wrap the bottom of the drain pipe 5, so that the bottom of the drain pipe 5 is protected from being corroded by underground water, the left end and the right end of the first protection layer 7 support the tunnel invert 1, the support strength of the tunnel invert 1 is enhanced, and the tunnel is prevented from collapse due to excessive underground water at the bottom to cause safety accidents. And because resistance to plucking stock 12 inserts in first protection layer 7, first protection layer 7 can give resistance to plucking stock 12 a decurrent pulling force when the tunnel bottom is uplifted, and then transmits for tunnel invert 1, prevents the tunnel bottom uplift.
Example 5
As shown in fig. 1 and fig. 2, the present embodiment provides a root-type tunnel bottom structure of a tunnel tree, including: the tunnel inverted arch structure comprises a tunnel inverted arch 1, outer-layer circumferential steel bars 2, a connecting plate 3, a drain pipe 5, a first connecting rod 4 and an anti-pulling anchor rod 12, wherein the tunnel inverted arch 1 is arranged at the bottom of the tunnel; the outer-layer circumferential steel bars 2 are arranged above the tunnel inverted arch 1, and the outer-layer circumferential steel bars 2 are perpendicular to the tunnel inverted arch 1; the connecting plate 3 is fixedly arranged at the top end of the outer layer annular reinforcing steel bar 2; the drain pipe 5 is arranged right below the perpendicular bisector of the tunnel inverted arch 1, and a reserved joint is arranged on the drain pipe 5; the first connecting rod 4 is arranged between the connecting plate 3 and the drain pipe 5, the top end of the first connecting rod 4 is fixedly connected with the connecting plate 3, and the bottom end of the first connecting rod 4 is fixedly connected with the reserved joint; resistance to plucking stock 12 is provided with many, many the upper end of resistance to plucking stock 12 with outer hoop reinforcing bar 2 links to each other, many the bottom and the first protective layer 7 of resistance to plucking stock 12 link to each other.
A waterproof layer 6 is arranged under the drain pipe 5, the waterproof layer 6 is arc-shaped, and the radian of the waterproof layer 6 is the same as that of the tunnel inverted arch 1.
A water guide pipe 8 is arranged in the first protective layer 7, one end of the water guide pipe 8 is connected with the drain pipe 5, the other end of the water guide pipe 8 is connected with the bottom of the side ditch 9, and filter screens are arranged at ports of two ends of the water guide pipe 8.
According to the embodiment of the invention, the annular blind pipe, the longitudinal blind pipe and the waterproof material are arranged on the arch crown of the tunnel, the lateral ditches bear the seepage water collected by the annular blind pipe and the longitudinal blind pipe of the tunnel, the seepage water of the lateral ditches 9 is guided into the drainage pipe 5 by the water guide pipe 8 to be quickly discharged, the drainage pressure is reduced, and the water guide pipe at the bottom of the lateral ditches can quickly and completely discharge the accumulated water in the lateral ditches during drainage because one end of the water guide pipe 8 is connected with the bottom of the lateral ditches 9. The filter screens arranged at the two ends of the water guide pipe 8 can filter massive objects, so that the water guide pipe is prevented from being blocked and further cannot drain water in time.
Example 6
As shown in fig. 1 and fig. 2, the present embodiment provides a root-type tunnel bottom structure of a tunnel tree, including: the tunnel inverted arch structure comprises a tunnel inverted arch 1, outer-layer circumferential steel bars 2, a connecting plate 3, a drain pipe 5, a first connecting rod 4 and an anti-pulling anchor rod 12, wherein the tunnel inverted arch 1 is arranged at the bottom of the tunnel; the outer-layer circumferential steel bars 2 are arranged above the tunnel inverted arch 1, and the outer-layer circumferential steel bars 2 are perpendicular to the tunnel inverted arch 1; the connecting plate 3 is fixedly arranged at the top end of the outer layer annular reinforcing steel bar 2; the drain pipe 5 is arranged right below the perpendicular bisector of the tunnel inverted arch 1, and a reserved joint is arranged on the drain pipe 5; the first connecting rod 4 is arranged between the connecting plate 3 and the drain pipe 5, the top end of the first connecting rod 4 is fixedly connected with the connecting plate 3, and the bottom end of the first connecting rod 4 is fixedly connected with the reserved joint; resistance to plucking stock 12 is provided with many, many the upper end of resistance to plucking stock 12 with outer hoop reinforcing bar 2 links to each other, many the bottom and the first protective layer 7 of resistance to plucking stock 12 link to each other.
A waterproof layer 6 is arranged under the drain pipe 5, the waterproof layer 6 is arc-shaped, and the radian of the waterproof layer 6 is the same as that of the tunnel inverted arch 1.
First protective layer 7 top is provided with second protective layer 10, second protective layer 10 passes through second connecting rod 11 and links to each other with first protective layer 7 is fixed, first protective layer 7 with second protective layer 10 parcel is in the drain pipe 5 outside.
According to the embodiment of the invention, the second protective layer 10 is arranged to wrap the outer side of the drain pipe 5, so that the drain pipe 5 can be prevented from being corroded by underground water, the drain pipe 5 can be fixed and fixedly connected with the first protective layer 7, a downward anchoring tension is provided for the inverted arch of the tunnel through the drain pipe 5, and the tunnel bottom is prevented from being raised due to soft rock or expansive rock.
Example 7
As shown in fig. 1 and fig. 2, the present embodiment provides a root-type tunnel bottom structure of a tunnel tree, including: the tunnel inverted arch structure comprises a tunnel inverted arch 1, outer-layer circumferential steel bars 2, a connecting plate 3, a drain pipe 5, a first connecting rod 4 and an anti-pulling anchor rod 12, wherein the tunnel inverted arch 1 is arranged at the bottom of the tunnel; the outer-layer circumferential steel bars 2 are arranged above the tunnel inverted arch 1, and the outer-layer circumferential steel bars 2 are perpendicular to the tunnel inverted arch 1; the connecting plate 3 is fixedly arranged at the top end of the outer layer annular reinforcing steel bar 2; the drain pipe 5 is arranged right below the perpendicular bisector of the tunnel inverted arch 1, and a reserved joint is arranged on the drain pipe 5; the first connecting rod 4 is arranged between the connecting plate 3 and the drain pipe 5, the top end of the first connecting rod 4 is fixedly connected with the connecting plate 3, and the bottom end of the first connecting rod 4 is fixedly connected with the reserved joint; resistance to plucking stock 12 is provided with many, many the upper end of resistance to plucking stock 12 with outer hoop reinforcing bar 2 links to each other, many the bottom and the first protective layer 7 of resistance to plucking stock 12 link to each other.
A waterproof layer 6 is arranged under the drain pipe 5, the waterproof layer 6 is arc-shaped, and the radian of the waterproof layer 6 is the same as that of the tunnel inverted arch 1.
First protective layer 7 top is provided with second protective layer 10, second protective layer 10 passes through second connecting rod 11 and links to each other with first protective layer 7 is fixed, first protective layer 7 with second protective layer 10 parcel is in the drain pipe 5 outside.
A clamping block 13 is arranged between the second protective layer 10 and the tunnel inverted arch 1, and the first connecting rod 4 penetrates through the clamping block 13 to connect the connecting plate 3 and the drain pipe 5.
According to the embodiment of the invention, the first connecting rod 4 penetrates through the fixture block 13, and the fixture block wraps the first connecting rod 4, so that the first connecting rod 4 is prevented from being corroded, the fixture block 13 can support the tunnel inverted arch 1, support force is provided for the tunnel inverted arch 1, and the tunnel bottom is prevented from collapsing or deforming.
Example 8
As shown in fig. 1 and fig. 2, the present embodiment provides a method for constructing a root-type tunnel bottom structure of a tunnel, including: digging a foundation pit, and paving a waterproof layer 6; pre-burying a drain pipe 5 above the waterproof layer 6, connecting a first connecting rod 4 with a reserved joint of the drain pipe 5, laying water guide pipes 8 on two sides of the drain pipe 5, and respectively connecting two ends of each water guide pipe 8 with the drain pipe 5 and a side ditch 9; pouring a first protective layer 7, completely wrapping the aqueduct 8, embedding a second connecting rod 11 and an uplift anchor rod 12 in the first protective layer 7, pouring a second protective layer 10 above the drain pipe 5, and completely wrapping the second connecting rod 11 by the poured second protective layer 10; then, a clamping block 13 is poured, an outer-layer annular reinforcing steel bar 2 is erected, an anti-pulling anchor rod 12 is fixed at the bottom of the outer-layer annular reinforcing steel bar 2, a connecting plate 3 is fixedly arranged on the outer-layer annular reinforcing steel bar 2, the connecting plate 3 is fixedly connected with a first connecting rod 4, and a tunnel inverted arch 1 is poured.
According to the embodiment of the invention, the tunnel bottom is prevented from bulging due to high underground water pressure through the construction method, and the tunnel bottom is also prevented from bulging due to soft rock or expansive rock.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The utility model provides a tunnel root formula tunnel bottom structure which characterized in that includes:
the tunnel invert (1), the tunnel invert (1) is arranged at the bottom of the tunnel;
the outer-layer circumferential steel bars (2) are arranged above the tunnel inverted arch (1), and the outer-layer circumferential steel bars (2) are perpendicular to the tunnel inverted arch (1);
the connecting plate (3) is fixedly arranged at the top end of the outer layer circumferential reinforcing steel bar (2);
the drain pipe (5) is arranged right below the perpendicular bisector of the tunnel inverted arch (1), and a reserved joint is arranged on the drain pipe (5);
the first connecting rod (4) is arranged between the connecting plate (3) and the drain pipe (5), the top end of the first connecting rod (4) is fixedly connected with the connecting plate (3), and the bottom end of the first connecting rod (4) is fixedly connected with the reserved joint; and
the anti-pulling anchor rods (12) are arranged, the anti-pulling anchor rods (12) are provided with a plurality of anchor rods, the upper ends of the anti-pulling anchor rods (12) are connected with the outer-layer circumferential reinforcing steel bars (2), and the bottom ends of the anti-pulling anchor rods (12) are connected with the first protective layer (7);
a waterproof layer (6) is arranged right below the drain pipe (5), the waterproof layer (6) is arc-shaped, and the radian of the waterproof layer (6) is the same as that of the tunnel inverted arch (1);
the waterproof layer (6) is sequentially provided with a primary supporting concrete layer, a non-woven fabric layer and an EVA waterproof board layer from outside to inside;
first protection layer (7) set up waterproof layer (6) with between tunnel invert (1), just first protection layer (7) parcel drain pipe (5) bottom, the top of first protection layer (7) with tunnel invert (1) links to each other, the bottom of first protection layer (7) with waterproof layer (6) link to each other, first protection layer (7) about both ends all inwards incline the setting, just both ends perpendicular to about first protection layer (7) the tangent line of tunnel invert (1).
2. The tunnel tree-rooted tunnel bottom structure of claim 1, wherein: be provided with aqueduct (8) in first protective layer (7), the one end of aqueduct (8) links to each other with drain pipe (5), the other end and the side ditch (9) bottom of aqueduct (8) link to each other, the both ends port of aqueduct (8) all is provided with the filter screen.
3. The tunnel tree-rooted tunnel bottom structure of claim 1, wherein: first protective layer (7) top is provided with second protective layer (10), second protective layer (10) are fixed continuous with first protective layer (7) through second connecting rod (11), first protective layer (7) with second protective layer (10) parcel is in drain pipe (5) outside.
4. The tunnel tree-rooted tunnel bottom structure of claim 3, wherein: a clamping block (13) is arranged between the second protective layer (10) and the tunnel inverted arch (1), and the first connecting rod (4) penetrates through the clamping block (13) to be connected with the connecting plate (3) and the drain pipe (5).
5. A tunnel tree root type tunnel bottom structure construction method is characterized in that:
digging a foundation pit, and paving a waterproof layer (6); pre-burying a drain pipe (5) above the waterproof layer (6), connecting a first connecting rod (4) with a reserved joint of the drain pipe (5), laying water guide pipes (8) on two sides of the drain pipe (5), and respectively connecting two ends of each water guide pipe (8) with the drain pipe (5) and a side ditch (9);
pouring a first protective layer (7), completely wrapping the aqueduct (8), embedding a second connecting rod (11) and an uplift anchor rod (12) in the first protective layer (7), pouring a second protective layer (10) above the drain pipe (5), and completely wrapping the second connecting rod (11) by the poured second protective layer (10);
then, a clamping block (13) is poured, outer-layer circumferential reinforcing steel bars (2) are erected, an anti-pulling anchor rod (12) is fixed to the bottom of the outer-layer circumferential reinforcing steel bars (2), a connecting plate (3) is fixedly arranged on the outer-layer circumferential reinforcing steel bars (2), and the connecting plate (3) is fixedly connected with a first connecting rod (4) to pour the tunnel inverted arch (1).
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| EP1514998A1 (en) * | 2003-09-15 | 2005-03-16 | Valplast AG | Tunnel drainage construction |
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| CN111636899A (en) * | 2020-04-20 | 2020-09-08 | 中铁十八局集团有限公司 | Tunnel inverted arch structure for preventing bottom bulging and construction process |
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| EP1514998A1 (en) * | 2003-09-15 | 2005-03-16 | Valplast AG | Tunnel drainage construction |
| CN203515597U (en) * | 2013-10-18 | 2014-04-02 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel structure applicable to soft stratum |
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