Excavation side slope drainage system in frozen soil water-rich area

Abstract

The invention discloses an excavation side slope drainage system in a frozen soil water-rich area, and relates to the technical field of transformer substation side slope drainage. The problem that in the prior art, the excavation slope in the frozen soil water-rich area is poor in drainage effect and has the erosion risk is solved. Comprising an intercepting ditch arranged on a slope top, a plurality of drainage channels on a slope surface, a drainage blind ditch of a slope body, a plurality of upward-inclined floral tubes arranged in a quincunx shape and a drainage ditch on a slope toe, the intercepting ditch is communicated with the drainage channels, the upper ends of the upward-inclined floral tubes penetrate into a confined aquifer from the front face of the slope, and the lower ends of the upward-inclined floral tubes are communicated with the corresponding drainage channels. The drainage blind ditch extends into a confined aquifer of the side slope from the side face of the side slope and is communicated with the drainage ditch through the drainage pipe, and the drainage channel is communicated with the drainage ditch. The excavation side slope drainage system for the frozen soil water-rich area is used for side slope underground water drainage, the side slope drainage problem is solved from the four dimensions of the slope top, the slope surface, the slope body and the slope toe, the stability of the side slope is guaranteed, and the safety of a transformer substation is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of transformer substation slope drainage, in particular to an excavation slope drainage system in frozen soil and water-rich areas. Background Art

[0002] In substation construction, slopes are crucial structures, and water is a significant factor in slope landslides and collapses. When combined with frozen soil, the damage to the slope is significant. Statistics show that over 90% of slope landslides are caused by water. Water can soften the structural surfaces of the slope's rock and soil, reducing its shear resistance parameters. Groundwater can be categorized based on its burial conditions: permafrost, groundwater, and confined water. Permafrost refers to groundwater buried shallowly below the surface with a free surface, primarily recharged by atmospheric precipitation. Groundwater is buried above the first stable aquiclude below the surface, with a free surface. Groundwater is directly recharged by rainwater infiltration or river flow into the soil, and is also discharged directly by evaporation or flow into rivers. Confined water is groundwater contained in the aquifer between two stable aquicludes. If water from the slope flows into a substation near the slope, frozen soil can cause thawing, heaving, and cracking of structures within the substation.

[0003] Slope design projects often use intercepting ditches at the top and drainage ditches at the bottom. However, if the excavation slope in a permafrost-rich area has upper stagnant water, groundwater, and pressurized water, it cannot meet the drainage requirements, causing slope landslides and collapses. At the same time, it cannot prevent water in the slope from flowing toward the substation, causing damage to the substation walls and structures inside the substation. Summary of the Invention

[0004] The present invention provides an excavation slope drainage system for frozen soil and water-rich areas, which solves the slope drainage problem from four dimensions: slope top, slope surface, slope body and slope foot, ensures slope stability, and thus protects the safety of substations.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention discloses a drainage system for excavated slopes in frozen soil and water-rich areas, comprising an intercepting ditch arranged at the top of the slope, multiple drainage channels on the slope surface, a drainage culvert on the slope body, multiple upward-sloping flower pipes arranged in a plum blossom shape, and a drainage ditch at the foot of the slope. The drainage channel is connected to the intercepting ditch and the drainage ditch, the upper end of the upward-sloping flower pipe penetrates into the pressure water layer from the front of the slope, the lower end of the upward-sloping flower pipe is connected to the corresponding drainage channel, the drainage culvert penetrates into the pressure water layer of the slope from the side of the slope, the drainage culvert is connected to the drainage ditch through a drainage pipe, and the drainage channel is connected to the drainage ditch.

[0007] Furthermore, a plurality of slope protection lattice beams arranged in a plum blossom shape are provided on the slope surface, and drainage channels are provided along the length direction of the slope protection lattice beams.

[0008] Furthermore, the depth of the drainage ditch is greater than the depth of the frozen soil layer of the slope.

[0009] Furthermore, a plurality of drainage holes are provided on the ditch wall close to the slope side of the drainage ditch.

[0010] Furthermore, a filter layer is provided on the ditch wall of the drainage ditch close to the slope side.

[0011] Furthermore, a plurality of through holes are provided on the side wall of the upward-sloping flower tube, and the outer side wall of the upward-sloping flower tube is wrapped and covered with a permeable geotextile.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present application discloses a drainage system for an excavated slope in a frozen soil and water-rich area, in which the intercepting ditch at the top of the slope is connected to the drainage channel to discharge the upper stagnant water and collected water of the slope; the drainage channel on the slope surface is connected to the drainage ditch to discharge the groundwater of the slope; the upper end of the inclined flower pipe penetrates into the pressurized water layer, and the lower end of the inclined flower pipe is connected to the drainage channel to discharge the pressurized water of the slope; the drainage ditch is connected to the drainage ditch through the drainage pipe to further discharge the pressurized water of the slope; the drainage channel is connected to the drainage ditch at the foot of the slope, and the upper stagnant water, groundwater and pressurized water are discharged into the drainage ditch for centralized discharge; the drainage system for an excavated slope in a frozen soil and water-rich area of the present application guides the groundwater of the slope from four dimensions: the top of the slope, the surface of the slope, the slope body and the foot of the slope, reduces the infiltration of the slope water to form groundwater recharge, solves the problem of poor slope drainage effect, ensures the stability and safety of the slope, avoids the risk of frozen soil erosion, and thus ensures the safety of substation structures, and is particularly suitable for drainage of excavated slopes in frozen soil and water-rich areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a cross-sectional view of a drainage system for excavated slopes in frozen soil and water-rich areas provided by an embodiment of the present invention;

[0016] Figure 2 This is a partial top view of an excavation slope drainage system for frozen soil and water-rich areas provided by an embodiment of the present invention.

[0017] Reference numerals:

[0018] Intercepting ditch 1, drainage channel 2, inclined flower pipe 3, drainage ditch 4, drainage hole 5, drainage pipe 6, drainage ditch 7, slope protection lattice beam 8, drainage trough 9, substation wall 10. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to the accompanying drawings and examples.

[0021] like Figure 1 、 Figure 2 As shown, this embodiment provides a drainage system for excavated slopes in permafrost-rich water-rich areas, comprising an intercepting ditch 1 at the top of the slope, multiple drainage channels 2 on the slope surface, a drainage culvert 7 on the slope, multiple upward-sloping flower pipes 3 arranged in a staggered plum blossom pattern, and a drainage ditch 4 at the foot of the slope. The drainage channels 2 communicate with the intercepting ditch 1 and the drainage ditch 4. The upper ends of the upward-sloping flower pipes 3 extend from the front of the slope into the confined water layer, and the lower ends of the upward-sloping flower pipes 3 communicate with the corresponding drainage channels 2. The drainage culvert 7 extends from the side of the slope into the confined water layer. The drainage culvert 7 communicates with the drainage ditch 4 via a drainage pipe 6, and the drainage channels 2 communicate with the drainage ditch 4. The drainage ditch 4 can lead to a ditch, a river, or an infiltration well.

[0022] Based on the above structure, a drainage system for excavated slopes in permafrost-rich water-rich areas is provided. The intercepting ditch 1 on the top of the slope is connected to the drainage channel 2 to discharge the upper stagnant water and the collected water of the slope; the drainage channel 2 on the slope surface is connected to the drainage ditch 4 to discharge the groundwater of the slope; the upper end of the inclined flower pipe 3 penetrates into the confined water layer, and the lower end of the inclined flower pipe 3 is connected to the drainage channel 2 to discharge the confined water of the slope; the drainage ditch 7 is connected to the drainage ditch 4 through the drainage pipe 6 to further ... groundwater of the slope; the drainage ditch 7 is connected to the drainage ditch 4 through the drainage pipe 6 to discharge the groundwater of the slope; the drainage ditch 7 is connected to the drainage ditch 4 through the drainage pipe The water channel 2 is connected with the drainage ditch 4 at the foot of the slope, and the upper stagnant water, groundwater and pressurized water are discharged into the drainage ditch for centralized discharge; the excavation slope drainage system in the frozen soil and water-rich areas of the present application guides the groundwater of the slope from four dimensions: the slope top, slope surface, slope body and slope foot, reduces the infiltration of slope water to form groundwater recharge, solves the problem of poor slope drainage effect, ensures the stability and safety of the slope, avoids the risk of frozen soil erosion, and thus ensures the safety of substation structures. It is particularly suitable for drainage of excavation slopes in frozen soil and water-rich areas.

[0023] As an implementable method, Figure 1 、 Figure 2As shown, a plurality of slope protection lattice beams 8 arranged in a plum blossom shape are provided on the slope surface, and drainage channels 9 are provided along the length direction of the slope protection lattice beams 8 .

[0024] The drainage trough 9 is connected to the drainage channel 2 or the drainage ditch 4 and is used to discharge the intercepted groundwater. The setting of the drainage trough 9 can discharge the groundwater in the phreatic layer into the drainage ditch 4 at the foot of the slope in time.

[0025] As an implementable method, Figure 1 、 Figure 2 As shown, the depth of the drainage ditch 4 is greater than the depth of the frozen soil layer of the slope.

[0026] The depth of the drainage ditch 4 is greater than the depth of the frozen soil layer of the slope, which blocks the groundwater from flowing into the substation, avoids damage to the substation wall 10, and prevents water from entering the substation and damaging the structures therein.

[0027] As an implementable method, Figure 1 、 Figure 2 As shown, a plurality of drainage holes 5 are provided on the wall of the drainage ditch 4 close to the slope side.

[0028] The drainage holes 5 are helpful for draining the water from the slope into the drainage ditch 4. The number of the drainage holes 5 is at least two.

[0029] As an implementable method, Figure 1 、 Figure 2 As shown, a filter layer is provided on the wall of the drainage ditch 4 close to the slope side.

[0030] The setting of the filter layer prevents the soil of the slope from flowing into the drainage ditch 4, which would raise the water level and cause water to enter the substation and damage the substation structure. The filter layer can be formed by paving sand and gravel with decreasing particle size in layers.

[0031] As an implementable method, Figure 1 、 Figure 2 As shown, the side wall of the upward-slanted flower tube 3 is provided with a plurality of through holes, and the outer side wall of the upward-slanted flower tube 3 is wrapped and covered with a permeable geotextile.

[0032] A plurality of (at least two) through holes are provided along the wall of the upward-sloping flower tube 3 , and a permeable geotextile is used to prevent the flowing soil from clogging the through holes. Furthermore, the permeable geotextile can be wrapped around both ends of the upward-sloping flower tube 3 .

[0033] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A drainage system for excavation slopes in permafrost-rich water areas, characterized in that: The invention comprises a drainage ditch (1) arranged at the top of the slope, a plurality of drainage channels (2) on the slope surface, a drainage ditch (7) on the slope body, a plurality of upward-sloping flower pipes (3) arranged in a plum blossom shape, and a drainage ditch (4) at the foot of the slope. The drainage channel (2) is communicated with the drainage ditch (1) and the drainage ditch (4). The upper end of the upward-sloping flower pipe (3) penetrates into the pressure-bearing water layer from the front of the slope. The lower end of the upward-sloping flower pipe (3) is communicated with the corresponding drainage channel (2). The drainage ditch (7) penetrates into the pressure-bearing water layer of the slope from the side of the slope. The drainage ditch (7) is communicated with the drainage ditch (4) through a drainage pipe (6). The drainage channel (2) is communicated with the drainage ditch (4).

2. The excavation slope drainage system for frozen soil and water-rich areas according to claim 1 is characterized in that: A plurality of slope protection lattice beams (8) arranged in a plum blossom shape are arranged on the slope surface, and a drainage trough (9) is arranged along the length direction of the slope protection lattice beams (8).

3. The excavation slope drainage system for frozen soil and water-rich areas according to claim 1 is characterized in that: The depth of the drainage ditch (4) is greater than the depth of the frozen soil layer of the slope.

4. The excavation slope drainage system for frozen soil and water-rich areas according to claim 1, characterized in that: The drainage ditch (4) is provided with a plurality of drainage holes (5) on the ditch wall close to the slope side.

5. The excavation slope drainage system for frozen soil and water-rich areas according to claim 1, characterized in that: A filter layer is provided on the ditch wall of the drainage ditch (4) close to the side slope.

6. The excavation slope drainage system for frozen soil and water-rich areas according to claim 1, characterized in that: The side wall of the upward-sloping flower tube (3) is provided with a plurality of through holes, and the outer side wall of the upward-sloping flower tube (3) is wrapped and covered with a permeable geotextile.

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