CN211446421U - Structure for controlling settlement of high-liquid limit soil high-fill roadbed - Google Patents
Structure for controlling settlement of high-liquid limit soil high-fill roadbed Download PDFInfo
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- CN211446421U CN211446421U CN201921840429.6U CN201921840429U CN211446421U CN 211446421 U CN211446421 U CN 211446421U CN 201921840429 U CN201921840429 U CN 201921840429U CN 211446421 U CN211446421 U CN 211446421U
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Abstract
The utility model discloses a structure that control high liquid limit soil high fill subgrade subsides, the bottom of road bed is the gravel bed course, the top layer is the road surface structural layer, set up back cover layer on the gravel bed course, set up high liquid limit soil filling layer on back cover layer, in high liquid limit soil filling layer, set up natural gravel pile or gravel pile along the direction of height interval quincunx type of high liquid limit soil filling layer, be perpendicular to natural gravel pile or gravel pile direction of height interval and enclose the pile and arrange the sand ring in bags around the pile, and construct the layer of borduring in the road bed both sides construction of high liquid limit soil filling layer; laying waterproof geotextile on the top surface of the high liquid limit soil filling layer, constructing a top sealing layer on the top surface of the waterproof geotextile, and constructing a pavement structure layer on the top sealing layer; the steps on two sides of the roadbed are provided with intercepting ditches, the slope feet on two sides of the roadbed are provided with protection feet, and the outer sides of the protection feet are provided with drainage ditches. The utility model discloses an effective utilization to high liquid limit soil can guarantee to satisfy the requirement of filling of standard to high liquid limit soil road bed.
Description
Technical Field
The utility model relates to a highway engineering roadbed structure field specifically is a structure that high liquid limit soil high fill road bed subsides of control.
Background
With the rapid development of highway construction in China, the construction area of the highway is gradually pushed from more economically developed areas along the coast and along the rivers to less economically developed areas with more mountainous and hilly areas. Relevant geological survey data show that wide high liquid limit soil is distributed in Anhui regions, and scientific and reasonable treatment of the high liquid limit soil is a great practical problem which must be faced. Although the existing specification of China defines high liquid limit soil, no corresponding specification exists for the treatment of the embankment filler, the randomness of the treatment method is high, so that great blindness and uncertainty are caused in implementation, the construction quality is difficult to guarantee, great quality hidden trouble is brought to engineering, and the maintenance cost in the operation period is high. In the past, high liquid limit soil is mostly treated as a waste, so that the soil borrowing quantity is increased, too much cultivated land is occupied, and damage to the natural environment such as water and soil loss, ecological balance imbalance and the like is easily caused. Therefore, an effective roadbed filling structural form is adopted, and the roadbed can be directly filled on the basis of meeting the standard requirement on high liquid limit soil roadbed filling, so that high liquid limit soil is reasonably and effectively utilized.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a for avoiding the problem that above-mentioned prior art exists, provide a structure that control high liquid limit soil high fill road bed subsides to can directly be used for filling in the road bed with high liquid limit soil in the hope, effectively utilize high liquid limit soil, and guarantee to satisfy the requirement of filling of standard to high liquid limit soil road bed.
In order to achieve the above purpose, the utility model discloses the technical scheme who adopts is:
the utility model provides a structure that high liquid limit soil high fill road bed subsides which characterized in that: the high-liquid-limit soil filling layer is characterized by comprising a gravel cushion layer laid on the ground as a roadbed bottom layer, a sealing layer is laid on the gravel cushion layer in a compacting manner, a high-liquid-limit soil filling layer with a certain height is laid on the sealing layer in a compacting manner, a plurality of vertical natural gravel piles or gravel piles are uniformly distributed in the high-liquid-limit soil filling layer, the lower end of each natural gravel pile or gravel pile is respectively driven into the sealing layer, the distance between any two adjacent natural gravel piles or gravel piles is the same, a plurality of bagged sand rings are respectively arranged around each natural gravel pile or gravel pile in a surrounding manner, each bagged sand ring is respectively perpendicular to the corresponding natural gravel pile or gravel pile, a plurality of bagged sand rings corresponding to each natural gravel pile or gravel pile are distributed at equal intervals along the height direction of the natural gravel pile or gravel pile, slope-shaped cladding layers are respectively constructed on two opposite sides of the high-liquid-limit soil filling layer in a compacting manner, and step surface structures are respectively arranged on the lower middle parts of the cladding layers on each side, and waterproof geotextile is laid and fixed on the top surface of the high liquid limit soil filling layer, a top sealing layer which covers the top surfaces of the edge covering layers on the two sides is laid on the top surface of the waterproof geotextile in a compacted manner, and a pavement structure layer is constructed on the mountain top surface of the top sealing layer.
A structure that control high liquid limit soil height fill road bed subsides, its characterized in that: a plurality of natural gravel piles or gravel piles are uniformly distributed in the high liquid limit soil filling layer in a quincunx shape.
A structure that control high liquid limit soil height fill road bed subsides, its characterized in that: the step surface of each side edge covering layer is respectively provided with a water intercepting ditch, the slope toe position of each side edge covering layer is respectively provided with a foot protector, and the ground outside each side foot protector is respectively provided with a drainage ditch.
A structure that control high liquid limit soil height fill road bed subsides, its characterized in that: a plurality of rapid chutes are respectively arranged on the slope surface of each side of the binding layer in the vertical direction, and the rapid chutes on each side are distributed at equal intervals along the slope surface.
A structure that control high liquid limit soil height fill road bed subsides, its characterized in that: the bottom sealing layer and the edge covering layer both adopt loam or clay, and the compactness of the bottom sealing layer and the edge covering layer is not less than 98 percent; the soil body of the top sealing layer is coarse-grained soil, and the compactness of the top sealing layer is not less than 96%; the gravel cushion layer is medium coarse sand, the mud content is not more than 5%, and the fineness modulus is not more than 2.7; the particle size of the natural gravel in the natural gravel pile or the gravel pile is not more than 53mm, and the mud content is not more than 5%; the sand for filling the bagged sand ring is medium coarse sand, the sand with the grain diameter larger than 0.5mm preferably accounts for more than 50 percent of the total amount, the mud content is not more than 3 percent, and the permeability coefficient is not less than 5 x 10-3cm/s。
A structure that control high liquid limit soil height fill road bed subsides, its characterized in that: the gravel cushion layer and the bottom sealing layer are the same in height and are both 35-45 cm;
the height of the top sealing layer is 130-170 cm;
the thickness of the edge covering layer is 80-120 cm;
the diameter of the natural gravel pile or the gravel pile is 45-55cm, and the spacing distance between any adjacent natural gravel piles or gravel piles is 150-180 cm;
the maximum diameter of the bagged sand ring is 150-180cm, the minimum diameter is 25-35cm, the bagged sand ring is wrapped on the periphery of the natural gravel pile or the gravel pile, the width of the bagged sand ring penetrating into the natural gravel pile or the gravel pile is not less than 9-11cm, and the distance between any two bagged sand rings on the periphery of each natural gravel pile or the gravel pile in the height direction is 85-95 cm.
Compared with the prior art, the utility model discloses beneficial effect embodies:
1. the utility model discloses a method of borduring is filled up high liquid limit soil, has prevented rainwater, earth's surface runoff water to get into high liquid limit soil filling layer, has improved the filling quality of high liquid limit soil, reduces the maintenance cost of operation period, accelerates the engineering progress, has reduced engineering cost, effectively the reduction of erection time. Meanwhile, the damage to the natural environment caused by the water and soil loss, ecological balance imbalance and the like can be effectively avoided, wherein the cultivated land is occupied due to the fact that the abandoned soil or the borrowing soil is excessive.
2. The utility model discloses a set up natural gravel pile or gravel pile, sand ring in bags, can accelerate the moisture discharge in the high liquid limit soil fill road bed for the road bed subsides, has reduced the post-construction settlement volume of road bed, can effectively reduce the high liquid limit soil fill road bed moisture content that capillary water action arouses simultaneously and increase. The road surface jolting and rolling phenomena caused by overlarge post-construction settlement are avoided, and the driving is unsafe.
3. The utility model discloses a set up natural gravel stake or gravel pile, play replacement, crowded dense effect to high liquid limit soil filling roadbed, strengthened the stability of embankment side slope, under the reliable durable prerequisite of assurance structural performance, rationally reduced engineering cost, economic environmental protection.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numbers in the figures: 1 gravel cushion layer, 2 back cover layers, 3 waterproof geotechnological cloth, 4 natural gravel piles or gravel pile, 5 layers of borduring, 6 rapid trough, 7 high liquid limit filling layers, 8 capping layers, 9 road surface structural layers, 10 cut ditches, 11 bankets, 12 escape canals, 13 sand ring in bags.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1, in the embodiment, a roadbed bottom layer is a gravel cushion layer 1 laid on the ground, a roadbed top layer is a road surface structure layer 9, a sealing bottom layer 2 is laid on the gravel cushion layer 1 in a compacting manner, a high liquid limit soil filling layer 7 is laid on the sealing bottom layer 2 in a compacting manner, a plurality of natural gravel piles or gravel piles 4 are driven into the high liquid limit soil filling layer 7 along the height direction of the high liquid limit soil filling layer 7, the natural gravel piles or gravel piles 4 are uniformly distributed in the high liquid limit soil filling layer 7 at equal intervals, a plurality of bagged sand rings 13 are respectively arranged around each natural gravel pile or gravel pile 4 in a surrounding manner, each sand ring 13 is respectively perpendicular to the corresponding natural gravel pile or gravel pile 4, the bagged sand rings 13 corresponding to each natural gravel pile or gravel pile 4 are distributed at equal intervals along the height direction of the natural gravel pile or gravel pile 4, and two opposite sides of the high liquid limit soil filling layer 7 are respectively constructed with a slope-shaped and have a binding layer 5 with a step surface structure; the top surface of the high liquid limit soil filling layer 7 is paved with impermeable geotextile 3, a top sealing layer 8 is constructed on the top surface of the impermeable geotextile 3, and a pavement structure layer 9 is constructed on the top sealing layer 8; the steps of the two side claddings 5 are respectively provided with a water intercepting ditch 10, the toe parts of the two side claddings 5 are provided with a toe guard 11, the ground outside the toe guard 11 is respectively provided with a drainage ditch 12, and the vertical direction of the slope surfaces of the two side claddings 5 is provided with a rapid trough 6 every 50 meters.
In the utility model, the bottom sealing layer 2 and the edge covering layer 5 both adopt loam or clay, and the compactness of the bottom sealing layer 2 and the edge covering layer 5 is not less than 98 percent; the soil body of the top sealing layer 8 is coarse-grained soil, and the compactness of the top sealing layer 8 is not less than 96%; the gravel cushion layer 1 is medium coarse sand, the mud content is not more than 5 percent, and the fineness modulus is not more than 2.7; the particle size of the natural gravel in the natural gravel pile or gravel pile 4 is not more than 53mm, and the mud content is not more than 5%; the thickness of the gravel cushion layer 1 and the thickness of the bottom sealing layer 2 are both 40 cm; the thickness of the capping layer 8 is 150 cm; the thickness of the edge covering layer 5 is 100 cm; the diameter of the natural gravel pile or gravel pile 4 is 50cm, and the spacing distance between adjacent natural gravel piles or gravel piles 4 is 150-180 cm; the maximum diameter of the bagged sand ring 13 is 150-180cm, the minimum diameter is 30cm, the bagged sand ring is wrapped on the periphery of the natural gravel pile or gravel pile 4, and the width of the bagged sand ring penetrating into the natural gravel pile or gravel pile 4 is not less than 10 cm; the bagged sand rings 13 are spaced by 90cm along the height direction of the natural gravel pile or the gravel pile (4).
The utility model discloses construct according to following step:
step 1, leveling a field: before construction, the road section to be filled is leveled, so that no sundries such as accumulated water, turf, garbage, tree roots, large stones and the like exist in the road section, and the road section is rolled until the compactness is not less than 93%.
Step 2, laying a gravel cushion layer 1: selecting medium coarse sand, wherein the mud content of the medium coarse sand is not more than 5%, the fineness modulus is not more than 2.7, paving the medium coarse sand in a field, and flattening the medium coarse sand by using a flat bottom machine in cooperation with manpower to ensure that the thickness of the gravel cushion layer 1 is uniform and reaches 40 cm.
Step 3, paving a bottom sealing layer 2 and a natural gravel pile or gravel pile 4: the loam or clay used as the material of the bottom sealing layer 2 is paved on the gravel cushion layer 1, meanwhile, the natural gravel piles or gravel piles 4 are arranged according to the quincunx, the distance between the natural gravel piles or gravel piles 4 is 150-180cm, the diameter of the natural gravel piles or gravel piles 4 is 50cm, and the light rolling machine is matched with the manual rolling machine to roll the bottom sealing layer 2 to the compaction degree of not less than 98%.
Step 4, paving a high liquid limit soil layer 7 and a natural gravel pile or a gravel pile 4: and (3) flatly paving the high liquid limit soil on the bottom sealing layer 2, controlling the loose paving thickness of each layer to be 25-30 cm, and rolling by a method of firstly lightly pressing and then heavily pressing until the construction quality monitoring meets the standard requirement. The construction of the natural gravel pile or gravel pile 4 is continued according to step 3.
Step 5, arranging bagged sand rings 13 at intervals of 90cm along the height direction of the pile around the natural gravel pile or gravel pile 4, wherein the maximum diameter of the bagged sand rings 13 is 150-180cm, the minimum diameter is 30cm, sand for filling the bagged sand rings 13 is medium coarse sand, the sand content larger than 0.5mm is more than 50% of the total amount, the mud content is not more than 3%, and the permeability coefficient is not less than 5-10-3cm/s。
Step 6, constructing a binding layer 5: placing loam or clay which meets the requirements and is used as a material of the binding course 5 on two sides of the roadbed, and filling and rolling the loam or the clay and the high liquid limit soil by using a road roller until the compaction degree is not less than 98 percent; the thickness of the formed edge covering layer 5 is not less than 100 cm; and the slope ratio is controlled to be 1 to (1.5-1.75).
Step 8, constructing a top sealing layer 8: the selected coarse-grained soil is laid on the waterproof geotextile 3, and is rolled by a light road roller in cooperation with manpower, and the compaction degree is not less than 96%.
The embodiments of the present invention are only descriptions of the preferred embodiments of the present invention, not right the present invention is designed and limited, without departing from the design concept of the present invention, the technical personnel in the field should fall into the protection scope of the present invention for various modifications and improvements made by the technical solution of the present invention, and the technical contents of the present invention are all recorded in the claims.
Claims (6)
1. The utility model provides a structure that high liquid limit soil high fill road bed subsides which characterized in that: the high-liquid-limit soil filling layer is characterized by comprising a gravel cushion layer laid on the ground as a roadbed bottom layer, a sealing layer is laid on the gravel cushion layer in a compacting manner, a high-liquid-limit soil filling layer with a certain height is laid on the sealing layer in a compacting manner, a plurality of vertical natural gravel piles or gravel piles are uniformly distributed in the high-liquid-limit soil filling layer, the lower end of each natural gravel pile or gravel pile is respectively driven into the sealing layer, the distance between any two adjacent natural gravel piles or gravel piles is the same, a plurality of bagged sand rings are respectively arranged around each natural gravel pile or gravel pile in a surrounding manner, each bagged sand ring is respectively perpendicular to the corresponding natural gravel pile or gravel pile, a plurality of bagged sand rings corresponding to each natural gravel pile or gravel pile are distributed at equal intervals along the height direction of the natural gravel pile or gravel pile, slope-shaped cladding layers are respectively constructed on two opposite sides of the high-liquid-limit soil filling layer in a compacting manner, and step surface structures are respectively arranged on the lower middle parts of the cladding layers on each side, and waterproof geotextile is laid and fixed on the top surface of the high liquid limit soil filling layer, a top sealing layer which covers the top surfaces of the edge covering layers on the two sides is laid on the top surface of the waterproof geotextile in a compacted manner, and a pavement structure layer is constructed on the mountain top surface of the top sealing layer.
2. The structure for controlling the settlement of the high-liquid limit soil high-fill roadbed according to claim 1, wherein: a plurality of natural gravel piles or gravel piles are uniformly distributed in the high liquid limit soil filling layer in a quincunx shape.
3. The structure for controlling the settlement of the high-liquid limit soil high-fill roadbed according to claim 1, wherein: the step surface of each side edge covering layer is respectively provided with a water intercepting ditch, the slope toe position of each side edge covering layer is respectively provided with a foot protector, and the ground outside each side foot protector is respectively provided with a drainage ditch.
4. The structure for controlling the settlement of the high-liquid limit soil high-fill roadbed according to claim 1, wherein: a plurality of rapid chutes are respectively arranged on the slope surface of each side of the binding layer in the vertical direction, and the rapid chutes on each side are distributed at equal intervals along the slope surface.
5. The structure for controlling the settlement of the high-liquid limit soil high-fill roadbed according to claim 1, wherein: the bottom sealing layer and the edge covering layer both adopt loam or clay, and the compactness of the bottom sealing layer and the edge covering layer is not less than 98 percent; the soil body of the top sealing layer is coarse-grained soil, and the compactness of the top sealing layer is not less than 96%; the gravel cushion layer is medium coarse sand, the mud content is not more than 5%, and the fineness modulus is not more than 2.7; the particle size of the natural gravel in the natural gravel pile or the gravel pile is not more than 53mm, and the mud content is not more than 5%; the sand for filling the bagged sand ring is medium coarse sand, the sand with the grain diameter larger than 0.5mm preferably accounts for more than 50 percent of the total amount, the mud content is not more than 3 percent, and the permeability coefficient is not less than 5 x 10-3cm/s。
6. The structure for controlling the settlement of the high-liquid limit soil high-fill roadbed according to claim 1, wherein: the gravel cushion layer and the bottom sealing layer are the same in height and are both 35-45 cm;
the height of the top sealing layer is 130-170 cm;
the thickness of the edge covering layer is 80-120 cm;
the diameter of the natural gravel pile or the gravel pile is 45-55cm, and the spacing distance between any adjacent natural gravel piles or gravel piles is 150-180 cm;
the maximum diameter of the bagged sand ring is 150-180cm, the minimum diameter is 25-35cm, the bagged sand ring is wrapped on the periphery of the natural gravel pile or the gravel pile, the width of the bagged sand ring penetrating into the natural gravel pile or the gravel pile is not less than 9-11cm, and the distance between any two bagged sand rings on the periphery of each natural gravel pile or the gravel pile in the height direction is 85-95 cm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116479698A (en) * | 2023-06-21 | 2023-07-25 | 湖南大学 | Roadbed structure based on construction waste and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116479698A (en) * | 2023-06-21 | 2023-07-25 | 湖南大学 | Roadbed structure based on construction waste and construction method thereof |
| CN116479698B (en) * | 2023-06-21 | 2023-09-15 | 湖南大学 | Roadbed structure based on construction waste and construction method thereof |
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