CN215165696U - Tunnel portal side slope supporting structure - Google Patents
Tunnel portal side slope supporting structure Download PDFInfo
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- CN215165696U CN215165696U CN202120276231.0U CN202120276231U CN215165696U CN 215165696 U CN215165696 U CN 215165696U CN 202120276231 U CN202120276231 U CN 202120276231U CN 215165696 U CN215165696 U CN 215165696U
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- tunnel portal
- slope
- template
- retaining wall
- tunnel
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- 239000004567 concrete Substances 0.000 claims abstract description 37
- 239000004575 stone Substances 0.000 claims abstract description 28
- 239000011376 self-consolidating concrete Substances 0.000 claims abstract description 21
- 239000011435 rock Substances 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000003014 reinforcing effect Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000009415 formwork Methods 0.000 description 4
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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Abstract
The utility model provides a side slope supporting structure of a tunnel portal, wherein a retaining wall is fixed at the slope toe of the side slope of the tunnel portal and is positioned at the upper peripheral side of the tunnel portal; the template is arranged in a U shape with a downward opening, is arranged above the tunnel portal and is fixed on the side slope of the portal, two ends of the template are respectively connected with two ends of the retaining wall, and a filling bin is formed between the template and the retaining wall; the reinforced geogrid is laid at the bottom of the filling bin; pouring self-compacting concrete into the reinforced geogrid and solidifying to form a bottom plate; a plurality of blocks of stones are piled on the bottom plate; the drainage device is arranged between the rock blocks, self-compacting concrete is poured between the rock blocks and is solidified to form a rockfill concrete structure, and the drainage port of the drainage device is positioned outside the rockfill concrete structure. The utility model provides a technical scheme's beneficial effect is: the reinforcing measure formed by the rockfill concrete structure and the slope toe retaining wall has high strength and good stability, and the drainage device has good drainage effect and stability and is suitable for mountainous areas and the like with large rainfall and easy landslide.
Description
Technical Field
The utility model relates to a side slope prevention and cure technical field especially relates to a tunnel portal side slope supporting construction.
Background
At present, the scale of the infrastructure of China is gradually enlarged, and the construction of partial roads in the southwest mountainous area needs to pass through mountainous area tunnels, so that the stability of the side slope at the tunnel portal is particularly important. The stability of the slope in the process of tunnel excavation and support, namely the stability of the tunnel slope, needs to be controlled timely and effectively in the process of design and construction. By controlling the stability of the tunnel side slope, the long-term stability of the tunnel and the safe use of the road can be realized, and the economic loss and the casualties caused by instability are avoided.
For the tunnel slope, disturbance of external inducing factors, such as rainfall, earthquake and human engineering activities, can induce the instability of the tunnel slope to cause immeasurable loss. The prevention and control engineering types of the tunnel slope can be summarized as follows: blocking, discharging, cutting, protecting and improving. Common effective reinforcement measures are for example: reinforcing a slope toe at the front edge of the side slope; arranging a drainage hole or an inclined drainage hole at the slope surface; reinforcing the slope body by using an anti-slide pile; reasonably arranging a catch basin at the rear edge of the side slope; and supporting blind ditches inside the slope body, and the like. Through the prevention and control measures, the slope at the tunnel entrance can be effectively protected, so that the stability of the slope body is ensured, and safety guarantee is provided for development of tunnel entrance construction work.
The side slope at the tunnel portal is special in position, easy to be eroded by underground water and large in day and night temperature difference. Therefore, in the slope supporting engineering of the tunnel portal, the drainage problem of the slope body and the surface runoff needs to be considered preferentially. Secondly, in the traditional slope support construction process, a large amount of hydration heat is easily generated by pouring concrete, so that the support structure is easy to crack, and the slope support effect is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to solve the above problem, an embodiment of the present invention provides a side slope supporting structure for a tunnel portal.
An embodiment of the utility model provides a tunnel entrance to a cave side slope supporting construction, include:
the retaining wall is fixed at the slope toe of the side slope at the tunnel portal and is positioned on the upper peripheral side of the tunnel portal;
the template is arranged in a U shape with a downward opening, is arranged above the tunnel portal and is fixed on a side slope of the portal, two ends of the template are respectively connected with two ends of the retaining wall, and a filling bin is formed between the template and the retaining wall;
the reinforced geogrid is laid at the bottom of the filling bin;
self-compacting concrete, pouring into the reinforced geogrid and forming a bottom plate after solidification;
a plurality of stones stacked on the bottom plate;
and the drainage device is arranged among the rock blocks, a rock-fill concrete structure is formed after self-compacting concrete is poured among the rock blocks and solidified, and a drainage outlet of the drainage device is positioned outside the rock-fill concrete structure.
Furthermore, the rockfill concrete structure is formed by multiple times of layered pouring of the self-compacting concrete, and multiple layers of construction cold seams are formed in the rockfill concrete structure.
Further, a plurality of drainage devices are arranged in the two layers of the self-compacting concrete at the bottommost part in the rockfill concrete structure.
Further, the drainage device is arranged at the interlayer construction cold joint of the rockfill concrete structure.
Further, the drainage device comprises an inner pipe, an outer pipe, a filter element and a protective sleeve;
the inner tube is fixed in the outer tube, filter core demountable installation in the inner tube, the protective sheath is fixed in the end of intaking of outer tube.
Furthermore, the water outlet end of the inner tube is positioned outside the outer tube, and the outer side wall of one end of the inner tube, which is positioned outside the outer tube, is flush with the outer side wall of the outer tube.
Furthermore, a differential pressure amplification type check valve is installed at the water outlet end of the inner pipe, the differential pressure amplification type check valve is electrically connected with the detector, and the detector is arranged in the tunnel.
Further, the height of the retaining wall is more than 1 m; and/or the presence of a gas in the gas,
the template is made of a wood template.
Furthermore, the particle size of the lump stone is gradually increased from bottom to top.
Further, the block stone is rubble, coarse stone or pebble, and the diameter of the block stone is 20cm-30 cm; and/or the presence of a gas in the gas,
the reinforced geogrid is a steel-plastic polymer grid, the model is CAT30015B, and the tensile strength is 130 KN/m.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the used rock-fill concrete technology has the advantages of simple construction process, low comprehensive unit price, small hydration temperature rise, easy field quality control, high construction efficiency and short construction period. The technology of the rock-fill concrete industry is mature, the construction is efficient, the shear strength is high, and the slope deformation and damage can be effectively prevented. The reinforcing measure formed by the rockfill concrete structure and the slope toe retaining wall has high strength and good stability. On the one hand, the drainage device can effectively drain water and detect whether the drainage condition is good or not. On the other hand, can dismantle the filter core and can be used to other fields such as detection quality of water, have good drainage effect and stability, be applicable to the rainfall volume greatly, mountain areas such as the easy landslide that takes place.
Drawings
Fig. 1 is a front view of an embodiment of a slope supporting structure of a tunnel portal according to the present invention;
FIG. 2 is a cross-sectional view of the slope support structure of the tunnel portal of FIG. 1;
fig. 3 is a schematic view of the structure of the drainage apparatus of fig. 1.
In the figure: the device comprises a tunnel portal 100, a portal slope 200, a retaining wall 1, a template 2, a filling bin 21, a reinforced geogrid 3, self-compacting concrete 4, a block stone 5, a drainage device 6, an inner pipe 61, an outer pipe 62, a filter element 63, a protective sleeve 64, a differential pressure amplification type check valve 7 and a detector 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, an embodiment of the present invention provides a tunnel portal slope 200 supporting structure, which includes a retaining wall 1, a formwork 2, a reinforced geogrid 3, a self-compacting concrete 4, a plurality of stones 5, and a drainage device 6.
The tunnel portal 100 is located the massif front side, the massif is the slope setting towards one side of tunnel portal 100, and the massif that is located tunnel portal 100 both sides and top is tunnel portal side slope 200. The retaining wall 1 is fixed at the toe of the side slope 200 of the tunnel portal, is located on the upper peripheral side of the tunnel portal 100, and is in a U-shaped arrangement with a downward opening when viewed from the front. The template 2 is arranged in a U shape with a downward opening and is arranged above the tunnel portal 100 and fixed on the portal slope 200, two ends of the template 2 are respectively connected with two ends of the retaining wall 1, and a filling bin 21 is formed between the template 2 and the retaining wall 1. The reinforced geogrid 3 is laid at the bottom of the filling bin 21, and in the embodiment, the reinforced geogrid 3 is a steel-plastic polymer grid produced by the permanent construction technology development limited company, the model of the steel-plastic polymer grid is CAT30015B, and the tensile strength of the steel-plastic polymer grid is 130 KN/m. The self-compacting concrete 4 is poured into the reinforced geogrid 3 and is solidified to form a bottom plate, a plurality of block stones 5 are stacked on the bottom plate, the drainage device 6 is arranged between the block stones 5, and the self-compacting concrete 4 is poured between the block stones 5 and is solidified to form a rockfill concrete structure. The height of retaining wall 1 is more than 1m, can guarantee rockfill concrete structure's thickness, guarantees side slope supporting construction's intensity. The material of template 2 is the plank sheathing, after the rock-fill concrete structure forms, can dismantle template 2, uses repeatedly.
In this embodiment, the rockfill concrete structure is formed by multiple times of layered pouring of the self-compacting concrete 4, and multiple layers of construction cold seams are formed in the rockfill concrete structure. The particle size of the block stone 5 is gradually increased from bottom to top, the block stone 5 is rubble, coarse material stone or pebble, the diameter is 20cm-30cm, a small amount of flaky stone can be used, the quantity of the flaky stone is not more than 10% of the quantity of all the block stones 5, the strength of a rock-fill concrete structure is ensured, and the thickness of the block stone 5 is required to be reinforced according to the slopeThe projection height of (2) is controlled to be 1.2-1.8 m. The self-compacting concrete 4 completely fills the space between the stones 5 by self weight to form complete, compact, low-hydration-heat and large-volume concrete meeting the strength requirement. The 4-proportion requirement of the self-compacting concrete meets the requirement that the unit volume of coarse aggregate is 0.27-0.33M3And the rest is specified according to the concrete mixing proportion, and the total strength is not lower than 30 MPa. The rockfill concrete structure has extremely strong interlayer bonding force due to extremely strong construction cold joints formed by cementing the block stones 5 and the self-compacting concrete 4, and can improve the overall shear strength.
The water outlet of the drainage device 6 is positioned outside the rockfill concrete structure, and a plurality of drainage devices 6 can be arranged in the rockfill concrete structure at intervals. A plurality of drainage devices 6 are arranged in the two layers of the self-compacting concrete 4 at the bottommost part in the rockfill concrete structure, the drainage devices 6 are arranged at the interlayer construction cold joint of the rockfill concrete structure, and the drainage devices 6 are laid straightly and close to slope angles.
Further, drainage device 6 includes inner tube 61, outer tube 62, filter core 63 and protective sheath 64, inner tube 61 is fixed in the outer tube 62, the outer tube 62 adopts the PVC pipe, and the diameter is 70mm, and the inner tube 61 diameter is 50mm, and outer tube 62 can play the guard action to inner tube 61. Filter core 63 demountable installation in the inner tube 61, filter core 63 are removable type sintering felt filter core for detect the impurity composition content of local karst water. The protective sleeve 64 is fixed to the water inlet end of the outer tube 62 to prevent the water inlet from being clogged and the outlet from being exposed. The water outlet end of the inner tube 61 is located outside the outer tube 62, in this embodiment, the length of the end, located outside the outer tube 62, of the inner tube 61 is 500mm, and the outer side wall of the end, located outside the outer tube 62, of the inner tube 61 is flush with the outer side wall of the outer tube 62, so that the wall thickness of the end, located outside the outer tube 62, of the inner tube 61 is thicker, and the strength of the inner tube 61 can be enhanced. Pressure difference amplification formula check valve 7 is installed to the play water end of inner tube 61 for detect speed flow, judge the drainage effect, pressure difference amplification formula check valve 7 is connected with detector 8 electricity, arbitrary difficult interference site that receives in the tunnel is located to detector 8, the system battery of storage battery model 12V100AH UPS for the detector 8 power, detector 8 connects the municipal circuit to the operation of feedback drainage system under established procedure.
The utility model provides a tunnel entrance to a cave side slope supporting construction's specific construction process as follows:
slope surface pretreatment, after construction lofting, a retaining wall 1 is arranged at the slope toe of a side slope 200 of a tunnel portal, the height of the retaining wall 1 is 1m, a formwork 2 is supported on the retaining wall 1, the supporting height of the formwork 2 is higher than the design height 1m, the formwork 2 and the retaining wall 1 of the slope toe are enclosed to form a filling bin 21, a reinforced geogrid 3 is laid in the treated filling bin 21 as a bottom lining, a layer of self-compacting concrete 4 is poured on the bottom lining, and a bottom plate is formed after initial setting for 4-5 hours, so that the strength is ensured.
Piling up the rock block 5 on the bottom plate, arranging drainage device 6 between rock block 5 at an interval of 1m, guaranteeing to be straight, pouring and filling self-compaction concrete 4 to the height of rock block 5, drainage device 6 is wrapped up this moment, and the delivery port exposes, forms the construction cold joint of the strong cohesive force of first layer. After the initial setting of the first layer of cold joint, placing a second layer of block stones 5 and a second layer of drainage device 6 on the same way, pouring a second layer of self-compacting concrete 4 to fill the block stones 5, wrapping the drainage device 6, exposing a water outlet, and waiting for the initial setting of the second layer of cold joint. The whole stone 5 of placing to design height on upper portion, self-compaction concrete 4 is pour to design height in the layering, can retrieve template 2 after solidifying.
The utility model discloses a rock-fill concrete technique construction process is simple, synthesizes the unit price and hangs down, and the hydration temperature rise is little, easily on-the-spot quality control, and the efficiency of construction is high, and the time limit for a project is short. The technology of the rock-fill concrete industry is mature, the construction is efficient, the shear strength is high, and the slope deformation and damage can be effectively prevented. The reinforcing measure formed by the rockfill concrete structure and the toe retaining wall 1 has high strength and good stability. On one hand, the drainage device 6 can effectively drain water and detect whether the drainage condition is good or not. On the other hand, the detachable filter element 63 can be used for detecting water quality and other fields, has good drainage effect and stability, and is suitable for mountainous areas and the like with large rainfall and easy landslide.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a tunnel portal side slope supporting construction which characterized in that includes:
the retaining wall is fixed at the slope toe of the side slope at the tunnel portal and is positioned on the upper peripheral side of the tunnel portal;
the template is arranged in a U shape with a downward opening, is arranged above the tunnel portal and is fixed on a side slope of the portal, two ends of the template are respectively connected with two ends of the retaining wall, and a filling bin is formed between the template and the retaining wall;
the reinforced geogrid is laid at the bottom of the filling bin;
self-compacting concrete, pouring into the reinforced geogrid and forming a bottom plate after solidification;
a plurality of stones stacked on the bottom plate;
and the drainage device is arranged among the rock blocks, a rock-fill concrete structure is formed after self-compacting concrete is poured among the rock blocks and solidified, and a drainage outlet of the drainage device is positioned outside the rock-fill concrete structure.
2. The tunnel portal slope support structure of claim 1, wherein the rockfill concrete structure is formed by multiple layered pouring of the self-compacting concrete, and multiple layers of construction cold seams are formed in the rockfill concrete structure.
3. The tunnel portal slope supporting structure of claim 2, wherein a plurality of said drainage means are provided in the two bottommost layers of said self-compacting concrete in said rockfill concrete structure.
4. The tunnel portal slope supporting structure of claim 3, wherein the drainage means is provided at an inter-story construction cold joint of the rockfill concrete structure.
5. The tunnel portal slope support structure of claim 1, wherein the drainage means comprises an inner tube, an outer tube, a filter element and a protective sleeve;
the inner tube is fixed in the outer tube, filter core demountable installation in the inner tube, the protective sheath is fixed in the end of intaking of outer tube.
6. The tunnel portal slope support structure of claim 5, wherein the water outlet end of the inner tube is located outside the outer tube, and the outer side wall of the end of the inner tube located outside the outer tube is flush with the outer side wall of the outer tube.
7. The tunnel portal slope supporting structure of claim 6, wherein a differential pressure amplification type check valve is installed at the water outlet end of the inner pipe, the differential pressure amplification type check valve is electrically connected with a detector, and the detector is arranged in the tunnel.
8. The tunnel portal slope supporting structure of claim 1, wherein the height of the retaining wall is 1m or more; and/or the presence of a gas in the gas,
the template is made of a wood template.
9. The tunnel portal slope supporting structure of claim 1, wherein the particle size of the lump stones is gradually increased from bottom to top.
10. The tunnel portal slope support structure of claim 1, wherein the block stones are rubble stones, coarse stones or pebbles, and have a diameter of 20cm to 30 cm; and/or the presence of a gas in the gas,
the reinforced geogrid is a steel-plastic polymer grid, the model is CAT30015B, and the tensile strength is 130 KN/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120276231.0U CN215165696U (en) | 2021-01-28 | 2021-01-28 | Tunnel portal side slope supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120276231.0U CN215165696U (en) | 2021-01-28 | 2021-01-28 | Tunnel portal side slope supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215165696U true CN215165696U (en) | 2021-12-14 |
Family
ID=79408934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120276231.0U Expired - Fee Related CN215165696U (en) | 2021-01-28 | 2021-01-28 | Tunnel portal side slope supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215165696U (en) |
-
2021
- 2021-01-28 CN CN202120276231.0U patent/CN215165696U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |