CN110965416B - Bamboo reinforcement system for reinforcing mountain area high-fill roadbed and construction method - Google Patents
Bamboo reinforcement system for reinforcing mountain area high-fill roadbed and construction method Download PDFInfo
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- CN110965416B CN110965416B CN201911175335.6A CN201911175335A CN110965416B CN 110965416 B CN110965416 B CN 110965416B CN 201911175335 A CN201911175335 A CN 201911175335A CN 110965416 B CN110965416 B CN 110965416B
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Abstract
The invention discloses a bamboo reinforcement system for reinforcing a mountain area high-fill roadbed and a construction method, which comprises the following steps: (1) field grading; (2) determining a site reinforcement mode; (3) bamboo processing; and (4) reinforcement construction and filling and rolling. The invention can pertinently use the construction scheme of excavating steps for the highway subgrade filled by high according to the grading of the actual site; excavating steps and bamboo wood vertical reinforcement construction scheme; excavating steps, vertically reinforcing bamboo materials, and horizontally reinforcing bamboo materials; the construction scheme of excavation steps, vertical reinforcement of bamboo materials, horizontal reinforcement of bamboo materials and grouting of bamboo cavities effectively prevents engineering problems of sliding at two sides of an interface, uneven settlement, inconsistent compactness of upper and lower layers and the like in the construction of high-fill highway subgrade, and adopts novel bamboo materials as reinforcement materials, thereby adapting to the engineering design concepts of energy conservation, environmental protection and sustainable development advocated in the current highway construction.
Description
Technical Field
The invention relates to a high-fill roadbed processing construction method, in particular to a bamboo reinforcement system for reinforcing a mountain area high-fill roadbed and a construction method.
Background
Along with the gradual progress of the construction of expressways in China to mountain areas in the west, the construction of a plurality of roadbeds is realized by filling rock-soil mass materials on an original slope and compacting the rock-soil mass materials. Because one side of the roadbed is an undisturbed slope, and the other side is other rock-soil body materials, a natural interface exists between the filling section and the undisturbed slope, and because of the differences in the aspects of rock-soil body material composition, physical and mechanical properties, compactness and the like at two sides of the interface, slippage or uneven settlement can be easily generated at two sides of the interface under the condition of being influenced by rainwater or underground water; meanwhile, the high-filling roadbed adopts layered filling and compaction construction technology for the same or different filling materials, and the technology is easy to have the problems of uneven rolling at layered interfaces, inconsistent compactness of upper and lower layers, difficult formation of a stable whole of the whole embankment and the like.
The problems of relative sliding, uneven settlement, inconsistent compactness and the like on two sides of an interface easily cause roadbed damage and destruction, and serious pavement cracking further can be caused, so that the problem of 'interface' between a filling material and an undisturbed slope, between different filling materials and between layered filling surfaces is one of important problems in high-fill roadbed engineering construction.
At present, the construction method for excavating steps, filling layers and paving geogrids is commonly adopted in the high-fill embankment engineering, and mainly has four problems:
(1) The filling mode of the excavated steps is easy to cause the problems of slippage, uneven settlement and the like at the interface.
(2) The interface between the upper layer and the lower layer in the layered filling mode is easy to have the problems of uneven rolling, inconsistent compactness and the like.
(3) When the geogrid is used for reinforcing, one part of the geogrid is positioned on the original slope surface, one part of the geogrid is positioned on the filling material, and the geogrid is easy to be in an arch shape in the structure during later rolling, so that the stability of the road base is extremely unfavorable.
(4) The geogrid is made of chemical synthetic materials, the materials are buried in soil for a long time, the pollution to the soil is serious, a large amount of energy is consumed in the production process, and a large amount of waste residues, waste water and waste gas are produced, so that the geogrid is seriously different from the design concept of energy conservation, environmental protection and sustainable development advocated in the engineering construction at present.
Disclosure of Invention
Aiming at the problems that in the existing construction method, slippage and uneven settlement are easy to occur at the interface of the excavation step filling mode, uneven rolling and inconsistent compactness are easy to occur at the interface of the upper layer and the lower layer of the layered filling mode; the use of geogrids, which is a chemical composite material, requires a large amount of energy consumption in the production process and creates a large amount of waste residues, waste water and waste gas. The bamboo reinforcement system for reinforcing the mountain area high-fill roadbed and the construction method have the advantages of resource saving, environment-friendly materials, low cost and convenience in construction, and can meet various functional requirements.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a bamboo reinforcement system for reinforcing mountain area high-fill roadbed and a construction method thereof comprise the following steps:
(1): grading the field according to the soil property, the topography and the gradient, wherein the field grading can be divided into four grades I, II, III and IV;
(2): determining a site reinforcement mode, wherein the site reinforcement mode comprises the following steps: i-stage site is excavated on the ground of the original slope, roadbed layered filling and rolling are directly carried out, and reinforcement is not needed; the II-stage site is required to be added with bamboo vertical reinforcement on the basis of the I-stage site construction process; the III-level site is added with bamboo vertical reinforcement and bamboo horizontal reinforcement on the basis of the I-level site construction process; the level IV site is added with bamboo vertical reinforcement, bamboo horizontal reinforcement and bamboo cavity grouting on the basis of the level I site construction process.
(3): processing bamboo wood; the bamboo processing comprises the following steps:
(1) manufacturing an A-shaped bamboo tube section;
(2) b, manufacturing a bamboo tube section;
(3) manufacturing bamboo ribs;
(4) and (3) insect prevention, corrosion prevention and water prevention treatment are respectively carried out on the A-type bamboo tube section, the B-type bamboo tube section and the strip bamboo ribs.
(4): reinforcing construction and filling and rolling; the reinforcement construction and filling rolling comprises the following steps:
(1) the method comprises the following steps Treating a substrate;
(2) the method comprises the following steps Slope step excavation;
(3) the method comprises the following steps The bamboo tube is vertically reinforced. Leading holes in the compacted filling layer, and driving the A or B type bamboo tube sections into the filling layer for vertical reinforcement, wherein the depth of the bamboo tube sections into the ground is 400mm; the transverse distance between the bamboo tube sections within the range of transversely extending the excavated step part by 1000mm is 700mm, the longitudinal and transverse distances between the bamboo tube sections at the rest filling parts are all 1000mm, and the bamboo tube sections are arranged in a crossing mode between the upper filling layer and the lower filling layer; the transverse spacing of the A or B type bamboo tube sections arranged at the substrate is 700mm, and the longitudinal spacing is 1000mm;
(4) the method comprises the following steps Bamboo reinforcement is added horizontally. Horizontally and longitudinally spreading the bamboo ribs above the compacted filling layer, and fixedly connecting the bamboo ribs with the A or B type bamboo tube sections by using steel wires to form a rectangular bamboo rib grid by the A or B type bamboo tube sections and the bamboo ribs; the strip-shaped bamboo ribs with insufficient length can be mutually spliced, the spliced part is firmly bound by steel wires, and the overlapping length of the two strip-shaped bamboo ribs is not less than 100mm; diagonal bamboo reinforcement can be properly arranged within 2000mm of filling interface;
(5) the method comprises the following steps Grouting the bamboo tube. Pressing cement slurry into the cavity of the B-shaped bamboo tube, and sealing the cavity of the B-shaped bamboo tube; the original slope body part and the base part are dense injection sections, and other roadbed filling parts are thin injection sections;
(6) the method comprises the following steps And (5) filling the roadbed. The single layer of the embankment is reinforced, filled and compacted, and then the embankment is constructed upwards layer by layer, the filling height of each layer of the same material is not less than 500mm, and different filling materials need to be layered; the roadbed filling is constructed layer by layer from the lowest position in a horizontal segmentation and vertical layering mode, and the same layer is constructed in a filling mode from two sides to the middle;
(7) the method comprises the following steps Leveling and rolling.
Further, the site classification mode in the step (1) is specifically as follows:
the I-stage field is as follows: the soil compactness is better, the gradient is smaller than 1 to 5 (2), the gradient is larger than 1 to 1.5, the gradient is smaller than 1 to 2.5 (3), loose soil and crushed soil are clamped, and the gradient is smaller than 1 to 5;
the II-level field is as follows: the soil compactness is better, the gradient is greater than 1 to 2.5 (2) of loose soil and crushed soil stones, the gradient is greater than 1 to 1.5, the gradient is less than 1 to 2.5 (3) of weathered rock mass and loose crushed stone, and the gradient is less than 1 to 5;
the III-level field is as follows: the method comprises the following steps of (1) loosening soil, clamping crushed soil and stones, wherein the gradient is greater than 1 to 2.5 (2) weathered rock mass and loosening crushed stone, the gradient is greater than 1 to 1.5, the gradient is less than 1 to 2.5 (3) soft soil such as paddy fields, lagoons and the like, and the gradient is less than 1 to 5 compared with weathered crushed rock mass and expansive soil;
the IV-level field is as follows: (1) weathered rock mass, loose gravel soil, weak soil such as paddy field, lake and pond with gradient greater than 1 to 2.5 (2), weathered broken rock mass and expansive soil with gradient greater than 1 to 1.5, weak soil such as paddy field, lake and pond with gradient less than 1 to 2.5 (3), weathered broken rock mass and expansive soil with gradient greater than 1 to 2.5.
Further, the bamboo processing in the step (3) comprises the specific manufacturing modes of (1), (2) and (3) as follows:
(1) manufacturing of A-shaped bamboo tube sections: selecting moso bamboo materials with the outer diameter within the range of 40-60 mm, cutting the moso bamboo materials into bamboo tube sections with the length of 800mm, and sharpening one end of each bamboo tube section;
(2) and (3) manufacturing a B-shaped bamboo tube section: selecting moso bamboo with the outer diameter within the range of 40mm-60mm, cutting the moso bamboo into bamboo tube sections with the length of 800mm, opening bamboo joints of the bamboo tube sections, making the inside of the bamboo tube sections into unidirectional through type bamboo tube cavities, leaving one bamboo joint at the bottom of the bamboo tube sections to be not through, sharpening one end of the bamboo joint, and arranging holes within the range of 300mm upwards from the bottom of the bamboo tube sections;
(3) and (3) manufacturing bamboo ribs: and manufacturing the rest moso bamboo materials into strip bamboo ribs with the width of 15-30 mm and the length of more than 50 mm.
Further, in the step (4), the process (1) specifically includes: the subgrade filling should first remove the base turf, humus, etc., and properly roughen the base.
Further, in the step (4), the flow (2) specifically includes: and excavating slope steps. And excavating steps at the interface of the filling section, wherein the transverse length of the steps is not less than 2000mm, the vertical height is not more than 3000mm, and the steps of the upper stage and the lower stage are continuous.
Further, in the step (4), the process (7) specifically includes: leveling and rolling. And (3) longitudinally layering and sectionally compacting along the line to finish the construction of a new filling layer, and then, repeatedly and circularly constructing the next layer from the step (2) until the top surface of the roadbed.
Drawings
FIG. 1 is a schematic view of an A-type bamboo tube segment of the present invention;
FIG. 2 is a schematic view of a B-type bamboo tube segment of the present invention;
FIG. 3 is a schematic view of a vertical reinforcement of bamboo material according to the present invention;
FIG. 4 is a vertical and horizontal reinforcement plan view of the bamboo material of the present invention;
FIG. 5 is a top view of the bamboo of the present invention with vertical and horizontal reinforcement;
FIG. 6 is a schematic view of the vertical and horizontal reinforcement and bamboo cavity grouting of the bamboo material of the present invention;
wherein 1 is a grouting port; 2 is a bamboo tube cavity; 3 is a grouting hole; 4 is bamboo joint; 5 is the roadbed roof; 6 is a filling rolling layer; 7 is an A-shaped bamboo tube section; 8 is bamboo reinforcement; 9 is cement slurry; 10 is a substrate; 11 is an excavation step; 12 is the original slope line; 13 is a water intercepting ditch; and 14 is a slope.
Detailed Description
The invention is further described with reference to the drawings and detailed description.
Example 1:
roadbed filling construction for I-level working condition:
step (1): and (5) treating a substrate. The subgrade filling should first remove the base turf, humus, etc., and properly roughen the base.
Step (2): and excavating slope steps. And excavating steps at the interface of the filling section, wherein the transverse length of the steps is not less than 2000mm, the vertical height is not more than 3000mm, and the steps of the upper stage and the lower stage are continuous.
Step (3): and (5) filling the roadbed. Layering and filling embankments, wherein the filling height of each layer of the same material is not less than 500mm, and layering is needed among different filling materials; the roadbed filling is constructed layer by layer from the lowest position in a horizontal segmentation and vertical layering mode, and the same layer is constructed in a filling mode from two sides to the middle.
Step (4): leveling and rolling. And (3) carrying out initial leveling on the new filling layer to ensure that the layer surface has no obvious local concave-convex, longitudinally layering and sectionally compacting along the line to finish the construction of the new filling layer, and then carrying out the construction of the next layer in a repeated cycle from the step (2) until the top surface of the roadbed is high.
Example 2:
for roadbed filling construction under the II-level working condition, as shown in fig. 3:
step (1): and (5) treating a substrate. The subgrade filling should first remove the base turf, humus, etc., and properly roughen the base.
Step (2): and excavating slope steps. And excavating steps at the interface of the filling section, wherein the transverse length of the steps is not less than 2000mm, the vertical height is not more than 3000mm, and the steps of the upper stage and the lower stage are continuous.
Step (3): the bamboo tube is vertically reinforced. Leading holes on the compacted filling layer and driving the A-shaped bamboo tube segments into the filling layer: as shown in figure 1, vertical reinforcement is carried out, the depth of the bamboo tube section into the ground is 400mm, the depth of the leading hole is slightly smaller than 400mm, and the sharpening treatment of one end of the bamboo tube section can facilitate the bamboo tube section to be driven into a stratum; the transverse distance between the bamboo tube sections within the range of transversely extending the excavated step part by 1000mm is 700mm, the longitudinal and transverse distances between the bamboo tube sections at the rest filling parts are all 1000mm, and the bamboo tube sections are arranged in a crossing mode between the upper filling layer and the lower filling layer; further, the transverse spacing of the A-shaped bamboo tube sections arranged at the base is 700mm, and the longitudinal spacing is 1000mm.
The vertical reinforcement of the bamboo tube improves the vertical bearing capacity of the filled roadbed on one hand, and on the other hand, the interfaces between the upper layer and the lower layer of the same material and at the layered positions of different materials are not easy to slip during rolling or later-stage service, so that the problems of uneven settlement, inconsistent compactness and the like at the interfaces are effectively prevented;
step (4): and (5) filling the roadbed. Vertical reinforcement, filling and compaction are carried out on a single layer of the embankment, then construction is carried out layer by layer upwards, the filling height of each layer of the same material is not less than 500mm, and different filling materials need to be layered; the roadbed filling is constructed layer by layer from the lowest position in a horizontal segmentation and vertical layering mode, and the same layer is constructed in a filling mode from two sides to the middle.
Step (5): leveling and rolling. And (3) carrying out initial leveling on the new filling layer to ensure that the layer surface has no obvious local concave-convex, longitudinally layering and sectionally compacting along the line to finish the construction of the new filling layer, and then carrying out the construction of the next layer in a repeated cycle from the step (2) until the top surface of the roadbed is high.
Example 3:
for the roadbed filling construction under the III-level working condition, as shown in fig. 4:
step (1): and (5) treating a substrate. The subgrade filling should first remove the base turf, humus, etc., and properly roughen the base.
Step (2): and excavating slope steps. And excavating steps at the interface of the filling section, wherein the transverse length of the steps is not less than 2000mm, the vertical height is not more than 3000mm, and the steps of the upper stage and the lower stage are continuous.
Step (3): the bamboo tube is vertically reinforced. The compacted filling layer is provided with a hole and is driven into an A-shaped bamboo tube section for vertical reinforcement, the depth of the bamboo tube section in the ground is 400mm, the depth of the hole is slightly smaller than 400mm, and the sharpening treatment of one end of the bamboo tube section can facilitate the bamboo tube section to be driven into a stratum; the transverse distance between the bamboo tube sections within the range of transversely extending the excavated step part by 1000mm is 700mm, the longitudinal and transverse distances between the bamboo tube sections at the rest filling parts are all 1000mm, and the bamboo tube sections are arranged in a crossing mode between the upper filling layer and the lower filling layer; further, the transverse spacing of the A-shaped bamboo tube sections arranged at the base is 700mm, and the longitudinal spacing is 1000mm.
Step (4): bamboo reinforcement is added horizontally. Horizontally and longitudinally spreading the bamboo ribs above the compacted filling layer, and fixedly connecting the bamboo ribs with the A-shaped bamboo tube sections by using steel wires, so that the A-shaped bamboo tube sections and the bamboo ribs form a rectangular bamboo rib grid, and the bamboo rib grid is tightly attached to the compacted filling layer as shown in fig. 5; the strip-shaped bamboo ribs with insufficient length can be mutually spliced, the spliced part is firmly bound by steel wires, and the overlapping length of the two strip-shaped bamboo ribs is not less than 100mm; furthermore, diagonal bamboo reinforcement can be properly arranged within 2000mm of the filling interface.
The bamboo reinforcement is horizontal to add the muscle and is connected vertical thick bamboo tube crowd as a whole, has effectively increased intensity and steadiness of whole system of adding the muscle, and the bamboo reinforcement grid that fixed connection formed between bamboo reinforcement and the thick bamboo tube is similar with conventional "geogrid" in certain sense with the muscle mode of adding, has effectively prevented the inhomogeneous subsidence of road bed, avoids the road bed to fill the layer and slides, and the mode that the bamboo timber added the muscle compares traditional geogrid, its material is more green, the cost is lower, it is better to add the muscle effect.
Step (5): and (5) filling the roadbed. Vertical reinforcement, filling and compaction are carried out on a single layer of the embankment, then construction is carried out layer by layer upwards, the filling height of each layer of the same material is not less than 500mm, and different filling materials need to be layered; the roadbed filling is constructed layer by layer from the lowest position in a horizontal segmentation and vertical layering mode, and the same layer is constructed in a filling mode from two sides to the middle.
Step (6): leveling and rolling. And (3) carrying out initial leveling on the new filling layer to ensure that the layer surface has no obvious local concave-convex, longitudinally layering and sectionally compacting along the line to finish the construction of the new filling layer, and then carrying out the construction of the next layer in a repeated cycle from the step (2) until the top surface of the roadbed is high.
Example 4:
for a grade iv condition roadbed fill, as shown in fig. 6:
step (1): and (5) treating a substrate. The subgrade filling should first remove the base turf, humus, etc., and properly roughen the base.
Step (2): and excavating slope steps. And excavating steps at the interface of the filling section, wherein the transverse length of the steps is not less than 2000mm, the vertical height is not more than 3000mm, and the steps of the upper stage and the lower stage are continuous.
Step (3): the bamboo tube is vertically reinforced. Leading holes on the compacted filling layer and driving the B-shaped bamboo tube segments into the filling layer: as shown in fig. 2, vertical reinforcement is carried out, the depth of the bamboo tube section into the ground is 400mm, the depth of the leading hole is slightly smaller than 400mm, and the sharpening treatment of one end of the bamboo tube section can facilitate the bamboo tube section to be driven into a stratum; the transverse distance between the bamboo tube sections within the range of transversely extending the excavated step part by 1000mm is 700mm, the longitudinal and transverse distances between the bamboo tube sections at the rest filling parts are all 1000mm, and the bamboo tube sections are arranged in a crossing mode between the upper filling layer and the lower filling layer; further, the transverse spacing of the B-shaped bamboo tube sections arranged at the base is 700mm, and the longitudinal spacing is 1000mm;
step (4): bamboo reinforcement is added horizontally. Horizontally and longitudinally spreading the bamboo ribs above the compacted filling layer, and fixedly connecting the bamboo ribs with the B-shaped bamboo tube sections by using steel wires, so that the B-shaped bamboo tube sections and the bamboo ribs form rectangular bamboo rib grid, and the bamboo rib grid is tightly attached to the compacted filling layer; the strip-shaped bamboo ribs with insufficient length can be mutually spliced, the spliced part is firmly bound by steel wires, and the overlapping length of the two strip-shaped bamboo ribs is not less than 100mm; furthermore, diagonal bamboo reinforcement can be properly arranged within 2000mm of the filling interface;
step (5): grouting the bamboo tube. One end of a high-pressure pipe is connected with a high-pressure grouting pump, the other end of the high-pressure pipe is connected with a grouting opening of the bamboo tube, and the high-pressure grouting pump is started to press cement slurry into the cavity of the bamboo tube; when the grouting cement amount reaches the position of a grouting hole of the bamboo tube, namely the grouting height is more than 300mm, or the surface of the bamboo tube is raised or overflowed, after stopping grouting and stabilizing pressure for five minutes, pulling out a high-pressure tube, and sealing the cavity of the bamboo tube after grouting is finished; further, grouting holes of the B-type bamboo tube sections implanted into the original slope body part and the base part are slightly dense, so that cement slurry flowing into the original slope body part through the grouting holes on the bamboo tube cavity after grouting is more, the original slope body part and the base part are dense grouting sections, and other filling roadbed parts are thin grouting sections.
The cement slurry of the dense injection section is used for cementing the original slope body, the base material and the filling material into a whole, so that the overall stability degree of the original broken slope body, the soft roadbed such as a paddy field and the like or the expansive soil roadbed is effectively improved, and the strength of the filling roadbed is improved; the cement slurry of the thin injection section can effectively stabilize the position of the bamboo tube section in the stratum, so that a stable pile pier is formed around the bamboo tube section, the bearing capacity of the roadbed is improved, and slippage and uneven settlement at the interface are effectively prevented; the targeted grouting technology effectively prevents the waste of the slurry, and has more pertinence to the reinforcement treatment of the road base;
step (6): and (5) filling the roadbed. Vertical reinforcement, filling and compaction are carried out on a single layer of the embankment, then construction is carried out layer by layer upwards, the filling height of each layer of the same material is not less than 500mm, and different filling materials need to be layered; the roadbed filling is constructed layer by layer from the lowest position in a horizontal segmentation and vertical layering mode, and the same layer is constructed in a mode of filling from two sides to the middle
Step (7): leveling and rolling. And (3) carrying out initial leveling on the new filling layer to ensure that the layer surface has no obvious local concave-convex, longitudinally layering and sectionally compacting along the line to finish the construction of the new filling layer, and then carrying out the construction of the next layer in a repeated cycle from the step (2) until the top surface of the roadbed is high.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention.
Claims (6)
1. The construction method of the bamboo reinforcement system for reinforcing the mountain area high-fill roadbed is characterized by comprising the following steps of:
(1): grading the field according to the soil property, the topography and the gradient, wherein the field is divided into four grades I, II, III and IV;
(2): determining a site reinforcement mode, wherein the site reinforcement mode comprises the following steps: i-stage site is excavated on the ground of the original slope, roadbed layered filling and rolling are directly carried out, and reinforcement is not needed; the II-stage site is required to be added with bamboo vertical reinforcement on the basis of the I-stage site construction process; the III-level site is added with bamboo vertical reinforcement and bamboo horizontal reinforcement on the basis of the I-level site construction process; the IV-level site is added with bamboo vertical reinforcement, bamboo horizontal reinforcement and bamboo cavity grouting on the basis of the I-level site construction process;
(3): processing bamboo wood; the bamboo processing comprises the following steps:
(1) manufacturing an A-shaped bamboo tube section; selecting moso bamboo materials with the outer diameter within the range of 40-60 mm, cutting the moso bamboo materials into bamboo tube sections with the length of 800mm, and sharpening one end of each bamboo tube section;
(2) b, manufacturing a bamboo tube section; selecting moso bamboo with the outer diameter within the range of 40mm-60mm, cutting the moso bamboo into bamboo tube sections with the length of 800mm, opening bamboo joints of the bamboo tube sections, making the inside of the bamboo tube sections into unidirectional through type bamboo tube cavities, leaving one bamboo joint at the bottom of the bamboo tube sections to be not through, sharpening one end of the bamboo joint, and arranging holes within the range of 300mm upwards from the bottom of the bamboo tube sections;
(3) manufacturing bamboo ribs;
(4) insect prevention, corrosion prevention and water prevention treatment are respectively carried out on the A-type bamboo tube section, the B-type bamboo tube section and the strip bamboo ribs;
(4): reinforcing construction and filling and rolling; the reinforcement construction and filling rolling comprises the following steps:
(1) the method comprises the following steps Treating a substrate;
(2) the method comprises the following steps Slope step excavation;
(3) the method comprises the following steps Vertical reinforcement of the bamboo tube; leading holes in the compacted filling layer, and driving the A or B type bamboo tube sections into the filling layer for vertical reinforcement, wherein the depth of the bamboo tube sections into the ground is 400mm; the transverse distance between the bamboo tube sections within the range of transversely extending the excavated step part by 1000mm is 700mm, the longitudinal and transverse distances between the bamboo tube sections at the rest filling parts are all 1000mm, and the bamboo tube sections are arranged in a crossing mode between the upper filling layer and the lower filling layer; the transverse spacing of the A or B type bamboo tube sections arranged at the substrate is 700mm, and the longitudinal spacing is 1000mm;
(4) the method comprises the following steps Bamboo reinforcement is horizontally reinforced; horizontally and longitudinally spreading the bamboo ribs above the compacted filling layer, and fixedly connecting the bamboo ribs with the A or B type bamboo tube sections by using steel wires to form a rectangular bamboo rib grid by the A or B type bamboo tube sections and the bamboo ribs; the strip-shaped bamboo ribs with insufficient length are mutually spliced, the spliced part is firmly bound by steel wires, and the overlapping length of the two strip-shaped bamboo ribs is not less than 100mm; diagonal bamboo reinforcement is properly arranged within 2000mm of filling interface;
(5) the method comprises the following steps Grouting the bamboo tube; pressing cement slurry into the cavity of the B-shaped bamboo tube, and sealing the cavity of the B-shaped bamboo tube; the original slope body part and the base part are dense injection sections, and other roadbed filling parts are thin injection sections;
(6) the method comprises the following steps Filling roadbed; the single layer of the embankment is reinforced, filled and compacted, and then the embankment is constructed upwards layer by layer, the filling height of each layer of the same material is not less than 500mm, and different filling materials need to be layered; the roadbed filling is constructed layer by layer from the lowest position in a horizontal segmentation and vertical layering mode, and the same layer is constructed in a filling mode from two sides to the middle;
(7) the method comprises the following steps Leveling and rolling.
2. The construction method of the bamboo reinforcement system for reinforcing the mountain high-fill roadbed according to claim 1, wherein the site classification in the step (1) is specifically as follows:
the I-stage field is as follows: the soil compactness is better, the gradient is smaller than 1 to 5, (2) the soil compactness is better, the gradient is larger than 1 to 1.5 and smaller than 1 to 2.5, and (3) the gradient is smaller than 1 to 5 when loosening soil and clamping crushed soil and stones;
the II-level field is as follows: the soil has better compactness, the gradient is greater than 1 to 2.5, (2) the loose soil and the crushed soil stone are clamped, the gradient is greater than 1 to 1.5 and less than 1 to 2.5, (3) the weathered rock mass and the loose crushed stone are weathered, and the gradient is less than 1 to 5; the III-level field is as follows: the method comprises the following steps of (1) loosening soil and clamping crushed soil and stones, wherein the gradient is greater than 1 to 2.5, (2) weathering rock mass and loosening crushed stone, the gradient is greater than 1 to 1.5 and less than 1 to 2.5, and (3) paddy fields and lagoons, wherein the gradient is less than 1 to 5 compared with weathering crushed rock mass and expansive soil;
the IV-level field is as follows: the method comprises the following steps of (1) weathered rock mass and loose gravel soil, wherein the gradient is greater than 1 to 2.5, (2) soft soil such as paddy field and lake pond, which is greater than 1 to 1.5, and expansive soil, which is less than 1 to 2.5, (3) soft soil such as paddy field and lake pond, which is greater than 1 to 2.5, and which is greater than 1 to 2.5.
3. The construction method of the bamboo reinforcement system for reinforcing the mountain high-fill roadbed according to claim 1, wherein the specific manufacturing modes of the bamboo processing (1), (2) and (3) in the step (3) are as follows:
(1) manufacturing of A-shaped bamboo tube sections: selecting moso bamboo materials with the outer diameter within the range of 40-60 mm, cutting the moso bamboo materials into bamboo tube sections with the length of 800mm, and sharpening one end of each bamboo tube section;
(2) and (3) manufacturing a B-shaped bamboo tube section: selecting moso bamboo with the outer diameter within the range of 40mm-60mm, cutting the moso bamboo into bamboo tube sections with the length of 800mm, opening bamboo joints of the bamboo tube sections, making the inside of the bamboo tube sections into unidirectional through type bamboo tube cavities, leaving one bamboo joint at the bottom of the bamboo tube sections to be not through, sharpening one end of the bamboo joint, and arranging holes within the range of 300mm upwards from the bottom of the bamboo tube sections;
(3) and (3) manufacturing bamboo ribs: and manufacturing the rest moso bamboo materials into strip bamboo ribs with the width of 15-30 mm and the length of more than 50 mm.
4. The construction method of the bamboo reinforcement system for reinforcing mountain area high-fill roadbed according to claim 1, wherein in the step (4), the process (1) is specifically: the subgrade filling should first remove the base turf, humus, and properly roughen the base.
5. The bamboo reinforcement system for reinforcing mountain high-fill roadbed and the construction method according to claim 1, wherein in the step (4), the flow (2) is specifically as follows: slope step excavation; and excavating steps at the interface of the filling section, wherein the transverse length of the steps is not less than 2000mm, the vertical height is not more than 3000mm, and the steps of the upper stage and the lower stage are continuous.
6. The construction method of the bamboo reinforcement system for reinforcing the mountain high-fill roadbed according to claim 1, wherein in the step (4), the flow (7) is specifically as follows: leveling and rolling; and (3) longitudinally layering and sectionally compacting along the line to finish the construction of a new filling layer, and then, repeatedly and circularly constructing the next layer from the step (2) until the top surface of the roadbed.
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| CN111910654A (en) * | 2020-07-07 | 2020-11-10 | 云南地质工程勘察设计研究院 | Application method of round bamboo slope fixation in filling slope |
| CN113818454A (en) * | 2021-08-31 | 2021-12-21 | 河海大学 | Slope reinforcing device and method for inducing directional growth of plant root system |
| CN114164729A (en) * | 2021-09-13 | 2022-03-11 | 昆明理工大学 | Bamboo reinforcement reinforced solidified soil road and construction method thereof |
| CN115341559B (en) * | 2022-08-25 | 2024-01-26 | 浙江交通职业技术学院 | Pre-buried reinforcement system of newly-built road bed side slope |
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| JP2912938B1 (en) * | 1998-03-04 | 1999-06-28 | イビデングリーンテック株式会社 | Greening method for flooded slopes using bamboo with excellent wave and water resistance |
| JP4498047B2 (en) * | 2004-07-27 | 2010-07-07 | 三井化学産資株式会社 | Reinforcement method for ground and / or underground objects |
| CN102953308B (en) * | 2012-05-17 | 2014-11-26 | 湖南大学 | Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed |
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