CN218116005U - Ecological type half-digging and half-filling roadbed structure for mountain highway - Google Patents
Ecological type half-digging and half-filling roadbed structure for mountain highway Download PDFInfo
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- CN218116005U CN218116005U CN202222187196.2U CN202222187196U CN218116005U CN 218116005 U CN218116005 U CN 218116005U CN 202222187196 U CN202222187196 U CN 202222187196U CN 218116005 U CN218116005 U CN 218116005U
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Abstract
The utility model discloses a mountain highway ecotype half-cut and half-fill roadbed structure, include that excavate out the excavation line in proper order on the ground surface line of mountain region natural gradient, half-cut and half-fill joint portion excavates into multistage step and shoulder part and builds retaining wall by laying bricks or stones, mainly lay multilayer geotechnological check room on multistage step, pour the cement of semifluid material and form the complex body in multilayer geotechnological check room, fill the fill between this complex body and the retaining wall, and pave road base course and road surface on the complex body and the fill in the retaining wall in proper order, form geotechnological check room reinforced, supply the vehicle to pass through half-cut and half-fill roadbed road surface stable structure from this; a plurality of drain pipes are embedded in the composite body, the filling body and the retaining wall, and each drain pipe extends out of the retaining wall to drain seepage water; therefore, the utility model has the advantages of simple structure, economical and applicable, ecological environmental protection, energy saving and emission reduction's structure embodies green engineering construction theory, and it combines corresponding construction method, has higher economic benefits and social.
Description
Technical Field
The utility model relates to an ecological road construction field specifically indicates a mountain area highway ecotype is partly dug and is partly filled roadbed structure.
Background
The mountain land area of China occupies about two thirds of the land area of China, and in the economic construction and development of mountain areas, roads are one of the main infrastructures for preferential construction. The road is a strip project, the excavation and filling area of the natural earth surface is reduced as much as possible based on the requirements of the hilly land and the ecological environment in the mountainous area, excavation materials are fully utilized, scarce mountain land resources are saved, and a half excavation and half filling mode is adopted. The roadbed is partly natural roadbed and partly newly filled fill, and an interface is formed between the two parts. The excavation part damages the geological structure of the original mountain, and the newly filled mountain and the newly filled roadbed are easy to generate sliding damage; meanwhile, the material characteristics of the fill are different from those of the mountain, and the longitudinal and transverse uneven settlement of the half-excavated half-filled roadbed can easily cause cracking. Therefore, the semi-excavated and semi-filled roadbed has more diseases in the construction process and the operation stage, and is a problem needing important research in stability design and analysis methods.
The existing half-excavated and half-filled roadbed adopts various measures at the filling and excavating junction to prevent the roadbed from non-uniform settlement and the newly filled roadbed from sliding and deforming. When the hillside is steep or has poor stability and is not suitable for digging more, structures such as bridges, suspended road platforms and the like can be adopted; when the integrity of the mountain rock is good, a half-cave can be adopted; the semi-excavated and semi-filled roadbed on the general steep slope can adopt shoulder protectors, building stones or retaining walls according to the terrain and geological conditions, excavate steps and lay geogrids within the roadbed range of the filling and excavating junction joint part. Although the measures can improve the service performance of the half-excavated half-filled roadbed to a certain extent, the construction cost is overhigh due to the fact that structures such as bridges, overhanging road platforms, half-caves and the like are adopted in the half-excavated half-filled road section, the tensile force exerting effect of the geogrid stretching is not high, and the application benefit is not good.
The widening of the newly filled roadbed part of the common road also belongs to the category of semi-excavation and semi-filling roadbeds, and an application example of reinforcing the newly filled roadbed part by adopting geocells is also provided, but the filling compactness in the geocells is difficult to control, and the geocells are easy to damage during rolling; therefore, the geocell is not applied much by adopting the reinforced half-excavated half-filled roadbed.
The geocell is a three-dimensional reticular cell structure formed by welding reinforced HDPE sheet materials with high strength, and is a green ecological, energy-saving and emission-reducing high-strength geotechnical building material. In order to fully utilize the high strength and polymerization characteristics of the geocell, starting from the filling of loose materials in the traditional geocell, the method is one direction of geocell application research, is beneficial to widening the application range of the geocell and further promotes the construction of the semi-excavated and semi-filled roadbed ecological road.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art's defect and provide a road bed structure is partly filled out to mountain area highway ecotype partly dug that simple structure, economy are suitable for, ecological environmental protection, energy saving and emission reduction.
The technical problem of the utility model is realized through following technical scheme:
an ecological half-excavating and half-filling roadbed structure of a mountain road comprises an excavation line which is sequentially excavated on a ground line with a natural gradient of a mountain land, a half-excavating and half-filling combination part is excavated into a plurality of steps and a road shoulder part to build a retaining wall, a plurality of layers of geocell are laid on the steps, a semifluid cementing material is poured in the geocell, a complex of the geocell and the cementing material is formed, a filling space is filled between the complex and the retaining wall, a road base layer and a road surface are sequentially laid on the complex and the filling space in the retaining wall, and an ecological half-excavating and half-filling roadbed and road surface stabilizing structure which is reinforced by the geocell and is used for vehicles to pass is formed; a plurality of drain pipes are buried in the composite body, the filling body and the retaining wall, and each drain pipe extends out of the retaining wall to drain seepage water.
The geocell is a three-dimensional mesh-shaped geocell structure formed by welding reinforced HDPE (high-density polyethylene) sheet materials with high strength, the plane size or height of each geocell is 15-25 cm, and the HDPE sheet materials forming the geocell are vertically porous.
The cementing material is semifluid geopolymer concrete, the geopolymer concrete consists of geopolymer, cement and sand, and is in a flow plastic shape and easy to fill in a geocell.
The integral structure of the composite body conforms to Hooke's law, and the Poisson ratio of the transverse strain to the vertical strain is
The fill is of a discrete structure and has an active earth pressure coefficient
Is greater than
The complex is actually set to be wide at the bottom and narrow at the top or narrow at the bottom and wide at the top or the same size at the top and the bottom.
The drain pipe be the PVC pipe, this drain pipe one end and the outward flange of complex body are hugged closely, and the other end stretches out retaining wall outer 10cm ~ 20cm, all is equipped with plum blossom form infiltration hole outer geotechnological cloth on every drain pipe, the drainage slope is 1% ~ 2%.
The ground line is a section line of the transverse ground of the mountain road route and is used as a reference line for designing the longitudinal section and the cross section of the semi-excavated and semi-filled roadbed structure; the excavation line is a partial connection line of a cross section which is determined according to the excavation depth of the road route center and needs to be excavated.
The retaining wall is a gravity type retaining wall and is built by adopting block stones and reinforced concrete; the width of each step is not less than 1.0m, and the height of each step is not less than 0.3m; the filling is formed by rolling and compacting common soil excavated by the side slope, slag and gravel; the base layer is formed by rolling and compacting cement stabilized soil; the pavement is a cement concrete pavement or an asphalt concrete pavement.
Compared with the prior art, the utility model mainly provides a mountain area highway ecotype partly excavates half and fills roadbed structure and construction method through half the complex body that sets up geotechnological check room and cementing material excavating half and fill juncture, solves half a plurality of diseases of digging half and fill roadbed structure, ensures engineering safety quality, is the main building material of ecological road construction. The utility model has the advantages of as follows: the geocell is a green, energy-saving and environment-friendly high-strength material, the waste utilization geopolymer saves a large amount of raw materials and energy and reduces pollution to the environment, the complex of the geocell and a cementing material has small transverse deformation, the stability of a semi-excavated and semi-filled roadbed structure is improved, uneven settlement is reduced, and the cost performance is higher; secondly, a complex is arranged on the roadbed at the junction of the half-excavation and half-filling, so that a fracture surface which is most easily generated at the junction is moved outwards, the filling soil pressure is reduced, the engineering quantity of the retaining wall is reduced, and the method is economical and economical; thirdly, the construction of the complex is simple, and compared with gravel, common soil, reinforced soil or other bulk aggregates filled geocell, the geocell filled with the cementing material can be highly compact without mechanical rolling, so that the damage to the structure of the geocell caused by mechanical rolling is avoided; and fourthly, the provided design calculation method is clear in principle, scientific, reasonable, practical and feasible, can guide the geocell reinforcement design construction of the half-excavated and half-filled roadbed, and improves the reinforcement effect. Therefore, the utility model relates to a simple structure, economy are suitable for, ecological environmental protection, energy saving and emission reduction's half fill roadbed geotechnological check room reinforcing method digs, embody green engineering construction theory, and it combines corresponding construction method, has higher economic benefits and social.
Drawings
Fig. 1 is a schematic view of the structure elevation of the present invention.
Fig. 2 is a diagram of a fill force.
Figure 3 is a force diagram of a geocell.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings.
As shown in fig. 1 to 3, 1 is a ground line, 2 is an excavation line, 21 is a step, 3 is a retaining wall, 31 is a drain pipe, 4 is a geocell, 5 is a cementing material, 6 is a filling, 7 is a base layer, 8 is a road surface, 9 is a fracture surface, 91 is a fracture surface I, and 92 is a fracture surface II.
An ecological half-excavating and half-filling roadbed structure of a mountain road and a construction method are disclosed, as shown in figure 1, belonging to the field of ecological road construction, the structure comprises that an excavation line 2 is excavated on a ground line 1 with a natural gradient of a mountain land in sequence, a half-excavating and half-filling joint part is excavated into a multi-stage step 21 and a road shoulder part masonry retaining wall 3, a plurality of layers of geocell chambers 4 are laid on the multi-stage step 21 within a certain range, a semifluid cementing material 5 is poured in the multi-layer geocell chambers, and a complex of the geocell chambers and the cementing material is formed; filling 6 between the complex and the retaining wall 3, sequentially paving a road base 7 and a road surface 8 on the complex and the filling 6 in the retaining wall 3, and forming an ecological semi-excavated semi-filled roadbed and road surface stabilizing structure reinforced by the geocell 4 for vehicles to pass through; a plurality of drain pipes 31 are buried in the composite body, the filling part 6 and the retaining wall 3, and each drain pipe extends out of the retaining wall 3 to discharge seepage water, so that the stability of the semi-excavated and semi-filled roadbed structure is facilitated.
Wherein, the ground line 1 is a horizontal ground section line of a mountain road route and is used as a reference line for designing the longitudinal section and the cross section of the half-excavated half-filled roadbed structure; the excavation line 2 is a partial connection line of a cross section to be excavated, which is determined according to the excavation depth of the road route center, and the excavation line needs to consider the stability of an excavation side slope and a filling retaining wall.
In order to prevent filling slip, the step 21 is a half-excavation half-filling joint surface, and is excavated into a plurality of steps step by step after a surface weathered layer is removed on the excavation ground line 1, wherein the width of each step 21 is not less than 1.0m, and the height of each step 21 is not less than 0.3m.
The retaining wall 3 is a gravity type retaining wall, can also adopt other forms of retaining walls, is used as a retaining structure for filling semi-excavated and semi-filled garbage, keeps the whole stability of a road and normal use under the load action of a road surface 8, a roadbed, a filling 6 and vehicles, and can be built by using block stones and reinforced concrete.
The drain pipe 31 is a PVC pipe, one end of the drain pipe is tightly attached to the outer edge of the composite body, the other end of the drain pipe extends into the retaining wall 3 and is exposed out of the wall surface of the retaining wall by 10-20 cm, the drain pipe 31 embedded in the composite body, the filling 6 and the retaining wall 3 is provided with plum blossom-shaped water seepage holes and is wrapped with geotextile, and the drainage gradient is 1-2%.
The geocell 4 is a three-dimensional reticular cell structure formed by welding reinforced HDPE (high-density polyethylene) sheets with high strength, and a structural body with strong lateral limitation and high rigidity is formed after the materials are filled, so that the geocell is a green ecological high-strength geotechnical building material with energy conservation and emission reduction. The plane size or height of each geocell 4 is 15-25 cm, HDPE (high-density polyethylene) sheets forming the geocell 4 are vertically porous, and the bonding materials 5 can easily penetrate among the geocells 4 and are bonded into a whole.
The cementing agent 5 is semifluid geopolymer concrete and is prepared by taking mineral waste and construction waste as raw materials, wherein AlO is adopted 4 And SiO 4 AlO as the main component 4 And SiO 4 The tetrahedral structural unit forms an inorganic polymer with a three-dimensional network structure, and the chemical formula is Mn { - (SiO) 2 )zAlO 2 }n·wH 2 O, amorphous to semi-crystalline, and has excellent mechanical properties, acid and alkali resistance and the like.
The geopolymer has a stable network structure, and can simultaneously complete alkali-aggregate reaction caused by the reaction of metal ion migration and aggregate of ordinary cement, so that the geopolymer has strong capability of undergoing natural destruction and high durability. The geopolymerization reaction process is formed by dehydration reaction between aluminosilicate, and the reaction is reversible under strong alkaline condition; on the other hand, the starting material becomes the product without loss of other substances except for dehydration. The ground polymer waste can be directly used as raw materials after being crushed, thereby saving a large amount of raw materials and energy and reducing the pollution to the environment. The geopolymer concrete consists of geopolymer, cement and sand, is in a flow plastic shape and is easy to pay attention to in a geocell. Compared with the geocell filled with gravel, ordinary soil, reinforced soil or other aggregates, the geocell 4 filled with the cementing material 5 can be highly compact without mechanical rolling, and the mechanical rolling is prevented from damaging the geocell structure. The cementing material can also adopt low-grade cement mortar, low-grade cement concrete or cement stabilized soil, thereby not only meeting the stress requirement but also saving the investment.
The integral structure of the composite body conforms to Hooke's law, and the Poisson ratio of the transverse strain to the vertical strain is
The filling 6 of common soil, slag and the like is a discrete structure, and the active soil pressure coefficient thereof
Is greater than
Due to the fact
The composite body of the geocell 4 and the cementing material 5 can reduce static soil pressure or active soil force, and is beneficial to the safety of the semi-excavated and semi-filled roadbed structure and the retaining wall 3. The combination of the geocell 4 and the cementing material 5 can be set to be wide at the bottom and narrow at the top or the same size at the bottom and the top according to actual conditions.
The filling 6 is made of local materials, and can utilize common soil, slag, gravel and the like excavated on the side slope and needs to be rolled and compacted; the base layer 7 is cement stabilized soil or other suitable base layers and needs to be rolled and compacted; the pavement 8 is a cement concrete pavement or an asphalt concrete pavement, and the quality meets the design requirement.
The multi-layer geocell is laid on the multi-stage steps of the excavation line from bottom to top, extends to a certain length towards the direction of the retaining wall and simultaneously extends along the longitudinal direction of the half-excavated half-filled roadbed structure; the complex of the geocell 4 and the cementing material 5 and the multistage steps 21 of the excavation line 2 form an integral oblique complex from bottom to top and from the transverse direction to the longitudinal direction, the whole complex section is in a trapezoid shape with unequal thickness at the upper end and the lower end, and the oblique length of the central line of the trapezoid is
At an angle to the horizontal of
The lower end has a horizontal thickness of
The upper end has a horizontal thickness of
The included angle of the variable cross section is
Starting from the central line of the lower end of the trapezoid
To the midpoint of the central line of the upper end
Is composed of
A shaft; the longitudinal length of the composite body along the half-excavated half-filled roadbed structure is supposed to be far longer than the oblique length
Taking the longitudinal length
Regarding the width of the inclined trapezoidal composite body as a one-dimensional variable-thickness elastic foundation beam, the two ends of the elastic foundation beam are elastically hinged, and the foundation reaction force of the elastic foundation beam is assumed to be
The strength of the vertical load of the filling equivalent to the weight of the vehicle is
(ii) a The following calculation formula is obtained according to the Coulomb pressure theory, the elastic mechanics and the force balance principle:
formula I,
The retaining wall 3 is slightly displaced outward by the vehicle load and the active earth pressure of the road surface 8, the base layer 7 and the filler 6, and the cracking surface 9 is the top surface of the upper edge of the trapezoidal section of the composite body, i.e. the cracking surface II 92, and the non-adhesive filler is taken as an example, the component force distribution load acting on the composite body is
Wherein the Coulomb active soil pressure coefficient and the included angle with the horizontal line are respectively
The composite body has friction resistance with the upper and lower contact surfaces
The load component force in the axial direction generates shear deformation,
arbitrary axial direction
Has an axial load strength of
Perpendicular to
Arbitrary axial direction
Has a load strength of
To simplify the calculation, the sum of the frictional resistances of the complex actions is assumed
Axial load component and
the flexural deformation in the axial direction is irrelevant, the infinitesimal analysis of the complex is taken, and the moment is taken from the right center of the infinitesimal body
Is provided with
By
Resultant force in axial direction equal to
Can obtain the product
The relation between the bending moment and the deflection of the elastic foundation beam
The differential equation of the elastic foundation beam obtained by the above formulas is
The second formula,
In the formula I, the differential equation is a variable coefficient ordinary differential equation, the solution is carried out by using power series, but the solution process is very complicated, and the fifth power series fitting is adopted to set
To obtain
It is assumed here that the two ends of the resilient foundation beam
、
Also conforming to the Winkler assumption, two end points
、
By shear force of displacement
Caused by boundary conditions and loading conditions
Substitution into
Can find out
And
substituting the five coefficients into a solution of the fitting of the elastic foundation beam obtained by the formula II;
in the second formula, the variable section velocity of the elastic foundation beam
Or when smaller, get
Simplifying the calculation of the beam with equal section or simplifying the variable section of the elastic foundation beam into a step beam
Segment calculation, each segment taking
For equal cross section, a differential equation set is listed for calculation according to continuous conditions, but the number of sections is not too large so as to avoid increasing the calculation engineering quantity;
the formula III,
To determine the maximum value of the bending moment of the elastic foundation beam, let
I.e. by
If the interval can be found in the above equation
Inner real root
The maximum value and the maximum value of the bending moment of the elastic foundation beam can be obtained, whether the maximum value is reasonable or not is analyzed by combining with practical problems, the unreasonable maximum value is abandoned, and the elastic foundation beam is pressed
Value application;
in the same way, in order to obtain the maximum value of the shearing force of the elastic foundation beam, the
I.e. by
If the interval can be found in the above equation
Inner real root
Obtaining the maximum value and the maximum value of the shearing force of the elastic foundation beam, analyzing whether the maximum value is reasonable or not by combining with practical problems, abandoning unreasonable maximum value, and pressing
Value application;
the formula IV,
The symbols in formula one, formula two, formula three and formula four are defined as:
the fracture surface 9 is that under the effect of vehicle load, road surface 8, basic unit 7, fill 6 produces initiative soil pressure, makes retaining wall 3 slide to the road bed outside or around retaining wall foundation somewhere rotation, makes fill 6 produce the crack to the road surface along retaining wall 3 certain height department, and this crack forms fracture surface 9 along half the vertical formation of filling the road bed structure of partly excavating, and the formation of fracture surface has destroyed the wholeness of half the filling road bed structure of partly excavating, road surface fill, leads to half the inside infiltration of filling the road bed structure of partly excavating, subsides, serious road bed slip, half the filling road bed slump.
For the semi-excavation and semi-filling roadbed structure, a fracture surface, namely a fracture surface I91, is most easily generated at the boundary of the semi-excavation and semi-filling roadbed structure, so that multi-stage steps are excavated at the joint part of the semi-excavation and semi-filling, and the composite body of the geocell 4 and the cementing material 5 is used for reinforcing, so that the fracture surface I91 is supposed to move to a fracture surface II 92, the active soil pressure of the filling 6 is reduced, the engineering quantity of the retaining wall 3 is reduced, and the economic benefit is achieved; if the possible fracture surface 9 passes through the composite body, the composite body has stronger shearing resistance, prevents the retaining wall 3 from sliding towards the outer side of the roadbed or rotating around a certain position of the retaining wall foundation, and improves the stability of the semi-excavation and semi-filling roadbed structure.
The construction method of the ecological semi-excavation and semi-filling roadbed structure of the mountain highway mainly comprises the following steps:
step one, drawing up the size of a complex of the geocell and the cementing material
(3) calculating and rechecking the structures of the retaining wall 3, the filling 6 and the composite body by using a formula I, a formula II, a formula III and a formula IV, and determining engineering materials and technical indexes;
step two, excavating roadbed
(2) mechanical equipment enters a field, a roadbed and a retaining wall foundation are excavated from top to bottom, and the excavated part is transported to a storage yard to be stacked for later use;
(3) excavating steps at the boundary of the semi-excavated and semi-filled roadbed structure, wherein each step 21 is longitudinally kept on a horizontal plane along a route, and the quality meets the design requirement;
step three, retaining wall, filling and composite construction
(2) taking the construction cement concrete retaining wall with three layers of height and 15-20 m of each section in the longitudinal length direction as an example, mixing cement concrete mixture, placing a template, filling settlement joint materials between the retaining wall foundations of each section, pumping and pouring the cement concrete retaining wall foundations, laying geotextile, and watering and curing to the design requirement; cleaning concrete scum on the top surface of the foundation and roughening the surface; erecting a lower-layer retaining wall body template, filling a settlement joint material between the wall bodies of each section of retaining wall, and pumping and pouring the cement concrete retaining wall body; the detection quality meets the design requirement;
(3) clearing the step foundation at the junction of the excavated semi-filled roadbed structure, wherein the bearing capacity meets the design requirement;
(4) the geocell 4 is laid on the bottommost step transversely towards the side of the retaining wall to the designed width and longitudinally towards the direction of the route, the geocell material is tensioned to open each geocell and then fixed by soil nails, each section of retaining wall is continuously laid with the geocell 4, the up-down penetration rate of the holes of the geocell is not less than 70 percent, so as to be beneficial to pouring semi-fluid geopolymer concrete;
(5) erecting a fixed template on the outer side of the geocell and tightly attaching to the edge of the geocell;
step four, constructing the base course and the road surface
(2) laying a base layer 7 in layers, and rolling and compacting;
(3) measuring lofting and determining pavement elevation:
(4) the machine tool equipment is in place, and the pavement materials are mixed and transported to the site for paving operation;
(5) and rolling the pavement mixture, and rolling and detecting and accepting according to the standard.
Therefore, the utility model relates to a simple structure, economy are suitable for, ecological environmental protection, energy saving and emission reduction's half fill roadbed geotechnological check room reinforcing method digs, embody green engineering construction theory, and it combines corresponding construction method, has higher economic benefits and social.
The embodiments of the present invention are only used for illustration and not for limiting the scope of the present invention. It should also be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
Claims (7)
1. An ecological semi-excavated and semi-filled roadbed structure of a mountain road comprises an excavation line (2) which is excavated on a ground line (1) with a natural gradient of a mountain land in sequence, and a semi-excavated and semi-filled joint part which is excavated into a multi-stage step (21) and a retaining wall (3) which is built on a road shoulder part, and is characterized in that a plurality of layers of geocells (4) are laid on the multi-stage step (21), a semi-fluid cementing material (5) is poured in the multi-layer geocells to form a complex of the geocells and the cementing material, a filling part (6) is filled between the complex and the retaining wall (3), a road base layer (7) and a road surface (8) are laid on the complex and the filling part (6) in the retaining wall (3) in sequence, and an ecological semi-excavated and semi-filled roadbed stable structure which is reinforced by the geocells (4) and is used for vehicles to pass is formed; a plurality of drain pipes (31) are buried in the composite body, the filling body (6) and the retaining wall (3), and each drain pipe extends out of the retaining wall (3) to drain seepage water.
2. The ecological half-excavated half-filled roadbed structure of the mountain highway according to the claim 1, characterized in that the geocell (4) is a three-dimensional mesh-shaped geocell structure formed by high-strength welding of reinforced HDPE sheet materials, the plane size or height of each geocell (4) is 15 cm-25 cm, and the HDPE sheet materials forming the geocell are vertically porous.
3. The ecological half-excavated half-filled roadbed structure of the mountain highway according to the claim 1, wherein the cementing material (5) is in a flow plastic shape and is easy to fill into a geocell.
4. The ecological semi-excavated semi-filled roadbed structure of the mountain highway according to the claim 1, wherein the integral structure of the composite body conforms to Hooke's law, and the ratio of the transverse strain to the vertical strain of the composite bodyPoisson's ratio of
The fill is of a discrete structure and has an active earth pressure coefficient
Is greater than
The complex is set to be wide at the bottom and narrow at the top or narrow at the bottom and wide at the top or the same size at the top and the bottom.
5. The ecological semi-excavation and semi-filling roadbed structure of the mountain highway according to claim 1, wherein the drainage pipes (31) are PVC pipes, one end of each drainage pipe (31) is tightly attached to the outer edge of the composite body, the other end of each drainage pipe (31) extends out of the retaining wall (3) by 10-20 cm, each drainage pipe (31) is provided with plum blossom-shaped water seepage holes, and each drainage pipe is externally wrapped with geotechnical cloth, and the drainage gradient is 1-2%.
6. The ecological type half-excavated and half-filled roadbed structure of the mountain highway according to the claim 1, characterized in that the ground line (1) is a section line of the transverse ground of the mountain road route and is used as a reference line for designing the longitudinal section and the cross section of the half-excavated and half-filled roadbed structure; the excavation line (2) is a partial connection line of a cross section which is determined according to the excavation depth of the road route center and needs to be excavated.
7. The ecological type half-excavated and half-filled roadbed structure of the mountain road according to the claim 1, characterized in that the retaining wall (3) is a gravity retaining wall; the width of each step (21) is not less than 1.0m, and the height of each step is not less than 0.3m; the base layer (7) is formed by rolling and compacting cement stabilized soil; the pavement (8) is a cement concrete pavement or an asphalt concrete pavement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222187196.2U CN218116005U (en) | 2022-08-19 | 2022-08-19 | Ecological type half-digging and half-filling roadbed structure for mountain highway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222187196.2U CN218116005U (en) | 2022-08-19 | 2022-08-19 | Ecological type half-digging and half-filling roadbed structure for mountain highway |
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| CN218116005U true CN218116005U (en) | 2022-12-23 |
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ID=84523959
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| CN202222187196.2U Active CN218116005U (en) | 2022-08-19 | 2022-08-19 | Ecological type half-digging and half-filling roadbed structure for mountain highway |
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2022
- 2022-08-19 CN CN202222187196.2U patent/CN218116005U/en active Active
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