CN220953473U - Tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system - Google Patents
Tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system Download PDFInfo
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- CN220953473U CN220953473U CN202322662980.9U CN202322662980U CN220953473U CN 220953473 U CN220953473 U CN 220953473U CN 202322662980 U CN202322662980 U CN 202322662980U CN 220953473 U CN220953473 U CN 220953473U
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- drainage
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- 239000002689 soil Substances 0.000 title claims abstract description 32
- 238000005336 cracking Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 239000013585 weight reducing agent Substances 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims description 18
- 239000004567 concrete Substances 0.000 claims description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000011378 shotcrete Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 4
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- 238000004064 recycling Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 14
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- 238000007789 sealing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
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- 239000004746 geotextile Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
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- 238000001764 infiltration Methods 0.000 description 1
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- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The utility model discloses a tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system, which comprises reinforced drainage, slope cutting and weight reduction and rigid support, wherein the reinforced drainage is a water interception ditch arranged at the top positions of a slope and an upward slope, and a drainage ditch is arranged at the bottom position of a slope; the slope cutting and weight reduction are achieved, the landslide body is cleaned, the topmost primary side slope is excavated into a slope, the slope is excavated subsequently into a step shape, I-steel is arranged on the inner side of the step by additionally arranging the rigid support, the technical field of tunnel open cut tunnel side slope protection engineering is related, the slope top and the slope bottom of the side slope are respectively used as a intercepting ditch and a drainage ditch, the slope surface and the retaining wall are provided with drain holes to strengthen drainage of the side slope, rapid treatment of landslide and crack of the side slope is achieved, the I-steel can be pulled out before backfilling of the open cut tunnel, recycling of resources is achieved, the retaining wall is poured on two sides of the cover arch, meanwhile, soil pressure of the side slope and the side slope is balanced, and preconditions are provided for subsequent crack treatment of the side slope.
Description
Technical Field
The utility model relates to the technical field of expansive soil slope treatment, in particular to a system for treating landslide and upward slope cracking of an expansive soil slope of a tunnel open cut tunnel.
Background
The protection of the side elevation slope of the tunnel portal is an important preparation work before entering the tunnel, is comprehensively influenced by various factors such as geological conditions, topography, rain and snow weather and the like, occurs when engineering diseases such as side slope landslide and side elevation slope cracking and the like, and seriously influences the construction safety and the construction progress of the tunnel portal. Particularly, the lower part of the tunnel portal side slope is expansive soil, the original support can not maintain the side slope to be stable, landslide and upward slope cracking occur, and the treatment is needed.
The existing expansive soil side slope treatment technology mainly comprises isolation and ditch drainage technology, filling or improvement technology, rigid retaining technology, vegetation protection and the like. The isolation and infiltration ditch drainage technology adopts civil cloth and geomembrane to seal in a water-proof way, the vegetation bag and the geobag are protected by weighting, the broken stone blind ditch and the drainage ditch drain water, the influence of the external environment on expansive soil is isolated, the purpose of stabilizing the side slope is achieved, but the construction process is more complex. The technology of changing and filling or improving adopts non-expansive soil to change and fill or adds modified materials to process, but the changing and filling has the difficult problems of borrowing soil and the like, the improvement is only applicable to areas with rich inorganic binder materials, and the improvement cost is too high for areas with deficient materials. The rigid supporting technology is simple, the construction period is long, the treatment cost is high, the vegetation protection technology is adopted, the vegetation protection is greatly influenced by seasons and climates, the time required for grass planting by spraying is long, the purpose of slope protection can not be achieved rapidly, the open cut tunnel slope is a temporary slope, and backfilling treatment is needed after the open cut tunnel construction is completed.
Therefore, based on the above technical problems, it is necessary for those skilled in the art to develop a system for treating landslide and uphill crack of the expansive soil slope of the open tunnel.
Disclosure of utility model
The utility model aims to provide a system for treating landslide and upward crack of an expansive soil slope of a tunnel open cut tunnel.
In order to achieve the above object, the present utility model provides the following technical solutions:
The utility model relates to a tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system, which comprises reinforced drainage, slope cutting and weight reduction and additionally comprises rigid supports, wherein the reinforced drainage is a water interception ditch arranged at the top positions of a slope and an upward slope, the top positions of the slope and the upward slope are provided with water interception ditches, and the bottom positions of the slope are provided with drainage ditches; the method comprises the steps of cutting a slope and reducing weight, wherein a slope body is cleaned, the topmost first-stage slope is excavated into a slope, the slope is cut and excavated into a step shape, I-steel is arranged on the inner side of the step, rigid support is additionally arranged, I-steel is arranged on the inner side of the step, anchor spraying support is arranged on the slope and the step, anchor spraying protection is carried out on the slope and the step, and the anchor spraying protection comprises an anchor rod, a reinforcing steel mesh and sprayed concrete; and (3) constructing retaining walls on two sides of the sleeve arch at the light-dark junction of the tunnel, wherein the retaining walls are used for preventing the crack of the upward slope from further developing.
Further, the retaining wall is embedded with retaining wall drain holes and the side slope is provided with drain holes for draining water in the side slope and the elevation slope.
Furthermore, the water led out from the side slope water discharge hole and the retaining wall water discharge hole flows into the drainage ditch to be discharged under the action of gravity.
Furthermore, I-steel is arranged on the inner side of the side slope in a beating mode.
Furthermore, the side slope is drilled through drilling equipment, anchor rods are installed, then reinforcing steel meshes are fixedly installed, and concrete is sprayed by a concrete spraying machine to seal the whole side slope.
In the technical scheme, the system for processing landslide and upward crack of the expansive soil slope of the open cut tunnel has the following beneficial effects:
1. By fully utilizing the existing resources, the method has good economy, simple construction steps and high construction efficiency;
2. The method has the advantages that the intercepting ditches and the drainage ditches are respectively formed on the tops of the side slopes and the bottoms of the side slopes, the drain holes are formed in the side slopes and the retaining walls to strengthen drainage of the side slopes, the side slopes are cut and excavated into a step shape, I-steel is driven into the inner sides of the side slopes, concrete is sprayed on the slopes and the steps, concrete retaining walls are poured on the two sides of the sleeve arch to prevent further development of cracks of the side slopes, rapid treatment of landslide and crack of the side slopes is achieved, the construction efficiency is improved, the construction period is saved, the I-steel can be removed before backfilling of open cut holes, recycling of resources is achieved, and the construction cost is reduced;
3. The soil pressure of the side slope and the upward slope can be balanced simultaneously by arranging the retaining wall, and preconditions are provided for subsequent upward slope crack treatment.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic diagram of a front view structure of a system for processing landslide and upward crack of an expansive soil slope of a tunnel according to an embodiment of the present utility model;
Fig. 2 is a schematic top view structure diagram of a system for processing landslide and upward crack of an expansive soil slope of a tunnel according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of an I-shaped steel structure of a tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system provided by an embodiment of the utility model;
Fig. 4 is a schematic diagram of a shotcrete structure of a slope landslide and downhill cracking treatment system for an expansive soil slope of a tunnel according to an embodiment of the present utility model.
Reference numerals illustrate: the construction method comprises the following steps of intercepting ditches 1, side slopes 2, upward slopes 3, tunnel sleeve arches 4, retaining walls 5, sprayed concrete 6, I-steel 7, drainage ditches 8, retaining wall drainage holes 9, side slope drainage holes 10, anchor rods 11, reinforcing steel meshes 12 and connecting ribs 13.
Detailed Description
In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.
See fig. 1-4;
The utility model relates to a tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system, which comprises reinforced drainage, slope cutting and weight reduction, and an additional rigid support, wherein the reinforced drainage is a water interception ditch 1 arranged at the top positions of the slope and the upward slope, a drainage ditch 8 is arranged at the bottom position of the slope 2, the slope cutting and weight reduction are carried out, the landslide body is cleaned, the topmost primary slope is excavated into a slope, the subsequent excavation is stepped, the additional rigid support is an I-steel 7 arranged at the inner side of the step, the slope and the step are provided with anchor spraying supports, the anchor spraying protection comprises anchor rods 11, reinforcing steel meshes 12 and sprayed concrete 6, the two sides of a sleeve arch 4 at the light and dark junction of the tunnel are provided with retaining walls 5, the retaining walls 5 are used for preventing the crack of the upward slope 3 from further developing, retaining walls 5 are embedded with retaining wall drain holes 9 and side slopes 2 are provided with drain holes 10 for draining water in the upward slope, the water led out from the side slope water discharge holes 10 and the retaining wall water discharge holes 9 flows into the drainage ditch 8 to be discharged under the action of gravity, I-steel 7 is arranged on the inner side of the side slope 2, the side slope 2 is drilled through drilling equipment and is provided with an anchor rod 11, then a reinforcing steel net piece 12 is fixedly arranged, a concrete spraying machine is adopted to spray concrete 6 to seal the whole side slope 2, the water in the retaining wall water discharge holes 9 is discharged into the drainage ditch 8 arranged at the bottom of the side slope 2 and is then connected into the original drainage system of the roadbed, the surface water and the water in the side slope are timely discharged, the soil body of the original landslide side slope 2 is cleaned, the construction is carried out according to the requirement of the first-stage support of excavation, the topmost side slope is excavated, the anchor spraying support is timely carried out, the anchor spraying support comprises an anchor rod installation 11, a reinforcing steel net piece installation 12 and a sprayed concrete spraying 6, the deformation resistance rigidity and timely sealing effect of the side slope can be improved, after the anchor spraying is completed, the first-stage anchor step from top to bottom is excavated, the height of the step is 1-2m, the width is 1-2m, I-steel 7 is driven into the inner side of the step to serve as an anti-slide pile, the length of the I-steel 7 is 6m, one end of the I-steel is cut into a pointed shape, the I-steel is driven by a pile driver conveniently, the exposed length of the I-steel is 1m, the I-steel is welded into a whole through connecting ribs 13, the I-steel is repeatedly circulated and constructed to the lowest step, retaining walls 5 are poured on two sides of a constructed sleeve arch to balance the soil pressure of a slope 3 and a slope 2, the slope stability is guaranteed, after the open cut tunnel construction is completed, the connecting ribs 13 are removed, the I-steel 7 is pulled out by adopting a vibrating hammer, the I-steel is recovered, and the resource utilization rate is improved.
The utility model has the following specific use process: when the device is used, a person skilled in the art digs a water intercepting ditch 1 at the position 5m outside the top of a landslide slope, and adopts the grout to perform masonry or concrete pouring and timely maintenance. The grade number of the landslide is well determined by the height of the landslide 2, the uppermost grade slope is excavated into a slope, the height is excavated into a step form, the height of each grade of step is 2m, and the step width is 2m. And excavating a landslide soil body from top to bottom by an excavator, slowing down the side slope according to the influence depth of the landslide soil body, drilling by adopting a gas leg type rock drill after the first-stage side slope excavation of the side slope 2 is completed, adopting high-pressure wind to clear holes after hole forming, grouting an anchor rod and installing the anchor rod 11 after hole clearing is completed, welding and fixing the processed reinforcing steel bar net sheet 12 on the anchor rod 11, and drilling according to the position of a water discharge hole 10 by adopting a drilling machine to reach the drilling depth. After the hole is cleared, the water drain hole 10 is formed by adopting a PVC pipe, drilling holes are formed in the front half section of the PVC pipe according to quincuncial arrangement, geotextile is wrapped outside the pipe, after the PVC pipe is installed, the hole opening is sealed by using plastic cloth, the sprayed surface is sprayed with concrete 6 for sealing, and then the plastic cloth on the water drain hole 10 is removed for water drainage. And driving I-steel 7 at a designated position by adopting a pile driver, excavating expanded soil at the front part of the I-steel 7 of the first-stage step by adopting an excavator and manual combination mode after all the driving is completed, welding two connecting ribs 13 on the I-steel 7 by adopting an alternating current electric welding machine, spraying concrete 6 for sealing, and repeatedly circulating in this way until the first-stage side slope toe position is excavated. And excavating a foundation of the retaining wall 5 and detecting bearing capacity between two side slopes on two sides of the tunnel sleeve arch 4, pre-burying a water discharge hole 9 when the retaining wall is poured so as to timely discharge water in soil body behind the retaining wall, cleaning the split sprayed concrete on the upward slope 3, re-spraying concrete 6 after cleaning to prevent surface water from entering, and after the concrete strength of the open cut tunnel arch ring reaches the standard and the waterproof construction is finished, backfilling the two sides symmetrically by adopting stone slag in a layered mode, removing a connecting rib 13 after the stone slag is backfilled to a distance of 30cm from the top of the I-steel, removing the I-steel 7 by adopting a vibrating hammer, backfilling the removed pile hole by adopting stone dust, and backfilling the top of the open cut tunnel to be flush with the arch ring after the open cut tunnel is continuously backfilled to a dense clay layer.
While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.
Claims (5)
1. A tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system comprises reinforced drainage, slope cutting and weight reduction and additionally comprises a rigid support, and is characterized in that the reinforced drainage is that intercepting ditches (1) are arranged at the top positions of a slope and an upward slope, intercepting ditches (1) are arranged at the top positions of a slope (2) and an upward slope (3), and drainage ditches (8) are arranged at the bottom positions of a slope (2); the method comprises the steps of cutting a slope and reducing weight, wherein a slope body is cleaned, the topmost first-level slope is excavated into a slope, the slope (2) is cut and excavated into a step shape, I-steel (7) is arranged on the inner side of the step, I-steel is arranged on the inner side of the step by additionally arranging rigid supports, anchor spraying supports are arranged on the slope and the step, and anchor spraying protection is carried out on the slope and the step, wherein the anchor spraying protection comprises an anchor rod (11), a reinforcing steel mesh (12) and sprayed concrete (6); retaining walls (5) are constructed on two sides of the sleeve arch (4) at the light-dark junction of the tunnel, and the retaining walls (5) are used for preventing cracks of the upward slope (3) from further developing.
2. The system for processing landslide and upward crack of the expansive soil slope of the open tunnel according to claim 1, wherein the retaining wall (5) is embedded with retaining wall water discharge holes (9) and the slope (2) is provided with slope water discharge holes (10) for discharging water in the interior of the slope.
3. The system for treating landslide and upward crack of the expansive soil slope of the open tunnel according to claim 2, wherein the water led out from the side slope water discharge hole (10) and the retaining wall water discharge hole (9) flows into the drainage ditch (8) to be discharged under the action of gravity.
4. A tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system according to claim 3, characterized in that an i-steel (7) is arranged on the inner side of the slope (2).
5. The system for treating landslide and upward crack of expanded soil slope of open tunnel according to claim 1, wherein the slope (2) is drilled by drilling equipment, anchor rods (11) are installed, reinforcing steel meshes (12) are fixedly installed, and concrete (6) is sprayed by a concrete spraying machine to seal the whole slope (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322662980.9U CN220953473U (en) | 2023-09-28 | 2023-09-28 | Tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322662980.9U CN220953473U (en) | 2023-09-28 | 2023-09-28 | Tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN220953473U true CN220953473U (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322662980.9U Active CN220953473U (en) | 2023-09-28 | 2023-09-28 | Tunnel open cut tunnel expansive soil slope landslide and upward slope cracking treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220953473U (en) |
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2023
- 2023-09-28 CN CN202322662980.9U patent/CN220953473U/en active Active
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