CN215857760U - Open cut tunnel extension foam concrete backfill structure - Google Patents
Open cut tunnel extension foam concrete backfill structure Download PDFInfo
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- CN215857760U CN215857760U CN202121507665.3U CN202121507665U CN215857760U CN 215857760 U CN215857760 U CN 215857760U CN 202121507665 U CN202121507665 U CN 202121507665U CN 215857760 U CN215857760 U CN 215857760U
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- 239000011381 foam concrete Substances 0.000 title claims abstract description 62
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 description 4
- 239000004746 geotextile Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
The utility model relates to a open cut tunnel lengthening foam concrete backfilling structure which comprises a cast-in-place T-shaped foundation, Larsen steel sheet piles, lateral connecting ribs, supporting rods, prefabricated steel arch plates, positioning bolts, inclined supporting rods, a cast-in-place wedge-shaped foundation, a foundation support, a groove, vertical inserting ribs, a drainage blind ditch, a drainage groove, a drainage pipe, a third foam concrete filling area, a second foam concrete filling area, a first foam concrete filling area and prefabricated side plates. The utility model has the beneficial effects that: the utility model can ensure the normal operation of the existing route in the open cut tunnel extension section in the whole construction process, realizes the open cut tunnel extension operation without a closed road, and has little influence on social traffic, thereby having better social benefit.
Description
Technical Field
The utility model relates to the technical field of road traffic safety, in particular to a open cut tunnel lengthening foam concrete backfill structure.
Background
The open cut tunnel is usually composed of a roof structure and side walls, depending on the terrain, geology and backfill conditions. When the bottom stratum may be squeezed into the hole, an inverted arch is required. When the top structure is made into an arch, the structure is called an arch-type open cut tunnel. The open cut is mainly used for tunnel openings or cutting sections which are damaged by collapse, falling rocks or flowing rocks and flowing mud, and is sometimes used as an effective means for treating diseases such as falling rocks and landslides of cutting. A tunnel is a necessary measure taken by a line passing through a mountain area or a complex terrain area. Many tunnel approaches are mostly in the form of shallow buried single-pressure or bias voltage in mountainous areas. Over time, shallow single-pressure or bias tunnels can create safety hazards for lines due to natural disasters. In order to avoid the situation, the protection of the lines among the tunnel groups by adopting the open cut tunnel lengthening mode is more reasonable and economical.
Traditional open cut tunnel is backfilled and is generally adopted the mode of thick high fill of filling, and high fill tunnel open cut tunnel is because self load structure limits, and the too big problem of ubiquitous vertical load arouses the structural deformation increase of portal and open cut tunnel structure easily, and overall stability reduces to influence the operation safety in tunnel. Meanwhile, when the open cut tunnel extension section is constructed, traffic needs to be interrupted, traffic control is carried out, and normal operation of traffic lines is influenced
Therefore, at present, a long open cut tunnel foam concrete backfill structure which is stable in structure, high in construction speed, effective in load shedding and settlement prevention and small in traffic influence is needed to be found out, and the structure is very important.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a open cut tunnel growing foam concrete backfill structure.
The open cut tunnel lengthening foam concrete backfilling structure comprises a cast-in-place T-shaped foundation, Larsen steel sheet piles, lateral connecting ribs, supporting rods, prefabricated steel arch plates, positioning bolts, inclined supporting rods, a cast-in-place wedge-shaped foundation, foundation supports, grooves, vertical inserting ribs, drainage blind ditches, drainage channels, drainage pipes, a third foam concrete filling area, a second foam concrete filling area, a first foam concrete filling area and prefabricated side plates, wherein the Larsen steel sheet piles are arranged at the bottom of the cast-in-place T-shaped foundation, the cast-in-place T-shaped foundation is arranged at the bottom of the inner side edge of an open cut tunnel lengthening section, the foundation supports are arranged at the top of the cast-in-place wedge-shaped foundation, the cast-in-place wedge-shaped foundation is arranged at the bottom of the outer side edge of the open cut tunnel lengthening section, the prefabricated side plates are respectively arranged on the cast-in-place T-place wedge-in-place foundation and the prefabricated wedge-in-place foundation, the prefabricated steel arch plates are arranged between the prefabricated side plates through the positioning bolts, the supporting rods are arranged between the steep slopes at the lower parts of the inner sides of the prefabricated side plates and the open cut tunnel lengthening section, the inclined support rod is arranged between the prefabricated side plate and the cast-in-place wedge-shaped foundation, lateral connecting ribs are arranged on the outer side of the prefabricated side plate, vertical inserting ribs are arranged in the concave groove, the concave groove is arranged in the ground on the outer side of the cast-in-place wedge-shaped foundation, the first foam concrete filling area is arranged in the area below the top end of the prefabricated side plate, the second foam concrete filling area is arranged above the first foam concrete filling area, the drainage blind groove is arranged at the top of the second foam concrete filling area and is close to the steep slope at the lower part, the drainage pipe is communicated with the drainage blind groove and the drainage groove at the side edge of the foam concrete filling area, the third foam concrete filling area is arranged above the second foam concrete filling area, and the drainage groove is arranged at the top and the side edge of the foam concrete filling area.
Preferably, the method comprises the following steps: and the top parts of the cast-in-situ T-shaped foundation and the cast-in-situ wedge-shaped foundation are provided with slots for mounting prefabricated side plates.
Preferably, the method comprises the following steps: the prefabricated steel arch bar is formed by welding an arch frame and a steel plate.
Preferably, the method comprises the following steps: the top of the prefabricated side plate is a 45-degree wedge-shaped surface, and the bottom of the prefabricated side plate is provided with a plug.
Preferably, the method comprises the following steps: the prefabricated steel arch bar and the prefabricated side plate contact surface are provided with angle-shaped water stop strips.
Preferably, the method comprises the following steps: the lower part abrupt slope of open cut tunnel extension section inboard is equipped with stock and anchor rope, and the hanging net passes through stock anchor head and anchor rope anchor head to be fixed on the abrupt slope of lower part, the hanging net outside is equipped with spouts and mixes the layer, spout and mix the layer outside and set gradually waterproof layer and geotechnological cloth.
Preferably, the method comprises the following steps: the anchor cable anchor head is provided with an anchor head support, the outer side of the prefabricated side plate is provided with a lifting lug and a lateral connecting rib, the support rod is arranged between the anchor head support and the lifting lug of the prefabricated side plate on the upper portion of the cast-in-situ T-shaped foundation, and the inclined support rod is arranged between the lifting lug of the prefabricated side plate on the upper portion of the cast-in-situ wedge-shaped foundation and the foundation support.
Preferably, the method comprises the following steps: and small gantry cranes are arranged at the tops of two sides of the first foam concrete filling area.
The utility model has the beneficial effects that:
1. the utility model can ensure the normal operation of the existing route in the open cut tunnel extension section in the whole construction process, realizes the open cut tunnel extension operation without a closed road, and has little influence on social traffic, thereby having better social benefit.
2. According to the open cut tunnel, foam concrete is backfilled layer by layer, so that the dead weight is effectively reduced, the vertical load is reduced, the stable structure of the open cut tunnel is ensured, and meanwhile, the first foam concrete filling area provides an operation platform for hoisting the prefabricated steel arch slab.
3. According to the open cut tunnel foundation, the bearing capacity of the open cut tunnel foundation is effectively improved by adopting the cast-in-place T-shaped foundation and the cast-in-place wedge-shaped foundation, the prefabricated side plates and the prefabricated steel arch plates are used for rapid installation, the supporting structures are arranged, the structural stability is effectively improved, and the construction period is shortened.
4. According to the utility model, lateral connecting ribs are arranged on the side surface of the prefabricated side plate, and grooves and vertical inserting ribs are arranged on the stratum, so that the ground gripping force of foam concrete is enhanced, and the integrity and stability of the open cut tunnel extension section are improved.
Drawings
FIG. 1 is a schematic view of a open cut tunnel extension foam concrete backfill structure;
FIG. 2 is a cross-sectional view of a cast-in-place T-footing;
FIG. 3 is a cross-sectional view of a cast-in-place wedge foundation;
FIG. 4 is a cross-sectional view of a prefabricated side panel;
FIG. 5 is a schematic view of the structure of the lower steep slope protection;
FIG. 6 is a schematic view of the installation of prefabricated side panels;
FIG. 7 is a layout view of the grooves and vertical dowels;
FIG. 8 is a schematic view of the hoisting of the prefabricated steel arch slab;
fig. 9 is a layout view of the drain blind ditch and the drain pipe.
Description of reference numerals: 1-upper steep slope; 2-geotextile; 3-waterproof layer; 4-spraying the mixed layer; 5, hanging a net; 6-lower steep slope; 7-anchor cable; 8-anchor cable head; 9-anchor head support; 10-anchor rod and anchor head; 11-anchor rod; 12-cast-in-place T-foundation; 13-Larsen steel sheet pile; 14-lateral connecting ribs; 15-lifting lug; 16-support bar; 17-prefabricating a steel arch plate; 18-angle water stop bar; 19-positioning bolt; 20-diagonal brace rod; 21-open cut tunnel extension section; 22-cast-in-place wedge foundation; 23-base support; 24-groove; 25-vertical dowel bars; 26-drainage blind ditch; 27-a drainage groove; 28-a drain pipe; 29-third foam concrete filled area; 30-second foam concrete filled area; 31-first foam concrete filled area; 32-prefabricated side panels; 33-slot; 34-plug; 35-wedge surface; 36-Small gantry crane.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the utility model. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
As an embodiment, the open cut tunnel lengthening foam concrete backfilling structure comprises geotextile 2, a waterproof layer 3, a spray mixing layer 4, a hanging net 5, an anchor rope 7, an anchor rope head 8, an anchor head support 9, an anchor rod head 10, an anchor rod 11, a cast-in-place T-shaped foundation 12, a Larsen steel sheet pile 13, a lateral connecting rib 14, a lifting lug 15, a support rod 16, a prefabricated steel arch plate 17, an angle-shaped water stop strip 18, a positioning bolt 19, an inclined support rod 20, a cast-in-place wedge-shaped foundation 22, a foundation support 23, a concave ditch 24, a vertical inserting rib 25, a drainage blind ditch 26, a drainage groove 27, a drainage pipe 28, a third foam concrete filling area 29, a second foam concrete filling area 30, a first foam concrete filling area 31 and a prefabricated side plate 32, wherein the Larsen steel sheet pile 13 is arranged at the bottom of the inner side edge of the open cut tunnel lengthening foam concrete backfilling structure, the foundation 22 is provided with the foundation support 23 at the top, the concrete-filled open cut tunnel is arranged at the bottom of the outer side edge of a open cut tunnel lengthening section 21, prefabricated side plates 32 are respectively arranged on a cast-in-place T-shaped foundation 12 and a cast-in-place wedge-shaped foundation 22, a prefabricated steel arch plate 17 is arranged between the prefabricated side plates 32 through positioning bolts 19, angle-shaped water stop strips 18 are arranged on the contact surfaces of the prefabricated steel arch plate 17 and the prefabricated side plates 32, an anchor rod 11 and an anchor cable 7 are arranged on a lower steep slope 6 on the inner side of the open cut tunnel lengthening section 21, a net 5 is fixed on the lower steep slope 6 through an anchor rod anchor head 10 and an anchor cable anchor head 8, a spraying and mixing layer 4 is arranged on the outer side of the net 5, a waterproof layer 3 and a geotextile 2 are sequentially arranged on the outer side of the spraying and mixing layer 4, an anchor head support 9 is arranged on the anchor cable anchor head 8, lifting lugs 15 and lateral connecting ribs 14 are arranged on the outer side of the prefabricated side plates 32, a support rod 16 is arranged between the anchor head support 9 and the lifting lugs 15, an oblique support rod 20 is arranged between the lifting lugs 15 and a foundation support 23, vertical joint bars 25 are arranged in the concave ditch 24 and are arranged in the ground outside the cast-in-place wedge-shaped foundation 22, the first foam concrete filling area 31 is arranged in the area below the top end of the prefabricated side plate 32, the second foam concrete filling area 30 is arranged above the first foam concrete filling area 31, the drainage blind ditch 26 is arranged at the top of the second foam concrete filling area 30 and is close to the lower steep slope 6, the drainage pipe 28 is communicated with the drainage blind ditch 26 and the drainage groove 27 on the side edge, the third foam concrete filling area 29 is arranged above the second foam concrete filling area 30, and the drainage groove 27 is arranged at the top and the side edge of the foam concrete filling area.
The top of the cast-in-place T-shaped foundation 12 and the top of the cast-in-place wedge-shaped foundation 22 are both provided with slots 33 for mounting prefabricated side plates 32.
The prefabricated steel arch bar 17 is formed by welding an arch frame and a steel plate.
The top of the prefabricated side plate 32 is a 45-degree wedge-shaped surface 35, and the bottom of the prefabricated side plate is provided with a plug 34.
The upper steep slope 1 is located above the lower steep slope 6.
And small gantry cranes 36 are arranged at the tops of two sides of the first foam concrete filling area 31.
Claims (8)
1. The utility model provides a open cut tunnel extension foam concrete backfill structure which characterized in that: the concrete cast-in-place steel plate pile foundation comprises a cast-in-place T-shaped foundation (12), Larsen steel plate piles (13), lateral connecting ribs (14), supporting rods (16), prefabricated steel arch plates (17), positioning bolts (19), oblique supporting rods (20), a cast-in-place wedge-shaped foundation (22), a foundation support (23), a groove (24), vertical joint bars (25), a drainage blind ditch (26), a drainage groove (27), a drainage pipe (28), a third foam concrete filling area (29), a second foam concrete filling area (30), a first foam concrete filling area (31) and prefabricated side plates (32), wherein the Larsen steel plate piles (13) are arranged at the bottom of the cast-in-place T-shaped foundation (12), the cast-in-place T-shaped foundation (12) is arranged at the bottom of the inner side edge of an open cut tunnel extension section (21), the foundation support (23) is arranged at the top of the cast-in-place wedge-place foundation (22), the cast-in-place wedge-place foundation (22) is arranged at the bottom of the outer side edge of the open tunnel extension section (21), the prefabricated side plates (32) are respectively arranged on a cast-in-place T-shaped foundation (12) and a cast-in-place wedge-shaped foundation (22), the prefabricated steel arch plates (17) are arranged between the prefabricated side plates (32) through positioning bolts (19), the supporting rods (16) are arranged between the prefabricated side plates (32) and lower steep slopes (6) on the inner sides of open cut tunnel lengthening sections (21), the inclined supporting rods (20) are arranged between the prefabricated side plates (32) and the cast-in-place wedge-shaped foundation (22), lateral connecting ribs (14) are arranged on the outer sides of the prefabricated side plates (32), vertical inserting ribs (25) are arranged in the grooves (24), the grooves (24) are arranged in the ground on the outer sides of the cast-in-place wedge-shaped foundation (22), the first foam concrete filling area (31) is arranged in an area below the top ends of the prefabricated side plates (32), and the second foam concrete filling area (30) is arranged above the first foam concrete filling area (31), the drainage blind ditch (26) is arranged at the top of a second foam concrete filling area (30) and is close to a steep slope (6) at the lower part, the drainage pipe (28) is communicated with the drainage blind ditch (26) and a drainage groove (27) at the side edge of the foam concrete filling area, the third foam concrete filling area (29) is arranged above the second foam concrete filling area (30), and the drainage groove (27) is arranged at the top and the side edge of the foam concrete filling area.
2. The open-cut tunnel extension foam concrete backfill structure according to claim 1, characterized in that: and the tops of the cast-in-place T-shaped foundation (12) and the cast-in-place wedge-shaped foundation (22) are provided with slots (33) for mounting the prefabricated side plates (32).
3. The open-cut tunnel extension foam concrete backfill structure according to claim 1, characterized in that: the prefabricated steel arch plate (17) is formed by welding an arch frame and a steel plate.
4. The open-cut tunnel extension foam concrete backfill structure according to claim 1, characterized in that: the top of the prefabricated side plate (32) is a 45-degree wedge-shaped surface (35), and the bottom of the prefabricated side plate is provided with a plug (34).
5. The open-cut tunnel extension foam concrete backfill structure according to claim 1, characterized in that: and an angle-shaped water stop strip (18) is arranged on the contact surface of the prefabricated steel arch plate (17) and the prefabricated side plate (32).
6. The open-cut tunnel extension foam concrete backfill structure according to claim 1, characterized in that: the open cut tunnel extension section (21) inboard lower part abrupt slope (6) are equipped with stock (11) and anchor rope (7), and string net (5) are fixed on lower part abrupt slope (6) through stock anchor head (10) and anchor rope anchor head (8), it mixes layer (4) to be equipped with to spout in the string net (5) outside, spout and mix layer (4) outside and set gradually waterproof layer (3) and geotechnological cloth (2).
7. The open-cut tunnel extension foam concrete backfill structure according to claim 6, characterized in that: be equipped with anchor head support (9) on anchor rope anchor head (8), prefabricated curb plate (32) outside is equipped with lug (15) and side direction splice bar (14), bracing piece (16) set up between lug (15) of prefabricated curb plate (32) on anchor head support (9) and cast-in-place T type basis (12) upper portion, slant vaulting pole (20) set up between lug (15) and basic support (23) of prefabricated curb plate (32) on cast-in-place wedge basis (22) upper portion.
8. The open-cut tunnel extension foam concrete backfill structure according to claim 1, characterized in that: and small gantry cranes (36) are arranged at the tops of two sides of the first foam concrete filling area (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121507665.3U CN215857760U (en) | 2021-07-02 | 2021-07-02 | Open cut tunnel extension foam concrete backfill structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121507665.3U CN215857760U (en) | 2021-07-02 | 2021-07-02 | Open cut tunnel extension foam concrete backfill structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215857760U true CN215857760U (en) | 2022-02-18 |
Family
ID=80332734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121507665.3U Active CN215857760U (en) | 2021-07-02 | 2021-07-02 | Open cut tunnel extension foam concrete backfill structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215857760U (en) |
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2021
- 2021-07-02 CN CN202121507665.3U patent/CN215857760U/en active Active
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