CN102953308B - Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed - Google Patents
Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed Download PDFInfo
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Abstract
The invention discloses a construction method of a bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed, comprising the following steps of: (1) machining a bamboo wood; processing a bamboo sheet; and manufacturing a bamboo rib cage, a bamboo rib grid and a bamboo rib U-shaped anchor nail; (2) flattening a field and setting out a pile position; (3) utilizing a vibration shock method of a vibration immersed tube method to construct to form a bamboo rib cage crushed stone pile and paving a crushed stone cushion layer on a pile top; and (4) digging a step; paving, connecting and anchoring the bamboo rib grid; and backfilling a soil material and rolling and leveling. The construction method is characterized in that the bamboo rib cage can effectively improve the bearing capability and the stability of the crushed stone pile; the bamboo rib grid can reinforce the connection between a filling region and a digging region, the differential deposition is reduced, and sliding and instability of sliding along a filling and digging connecting face is prevented; and the construction method has the beneficial effects that a bamboo rib is used as a reinforcement material so that a construction industry is developed towards a low-carbon, energy-saving, environment-friendly and sustainable development direction, and saves the investment under the condition of meeting the requirements of roadbed bearing capability and deformation stability.
Description
Technical field
The present invention relates to a kind of roadbed and process construction method, particularly relate to a kind of mountain highway and build in the improvement project of Ji Jiu road the two-way enhancing of bamboo wood reinforcement and partly fill out and partly dig weak roadbed construction method.
Background technology
In recent years, build in the transformation process of Ji Jiu road at mountain highway, frequently run into the build problem of cut-fill subgrades.Because cut-fill subgrades one side is original state roadbed, opposite side forms by filling, between roadbed excavation zone 1 and embankment district 2, exist so natural filling out to dig interface 3, due to interface both sides roadbed generating mode, physico-mechanical properties, the difference of the aspects such as underground water and roadbed internal construction, often causes roadbed side slope to produce relative settlement along interface slip, sidesway or road surface along interface and causes pavement cracking; And in the work progress of cut-fill subgrades, often run into the situation that embankment district is soft soil foundation, thereby soft soil foundation also will cause embankment district roadbed and excavation zone roadbed to produce relative settlement road pavement structure generation to be destroyed, and becomes very scabrous engineering problem.
For filling out the reinforcing of digging interface 3, traditional processing method is to adopt Application of geosynthetics-reinforced, geosynthetics can improve fills out stability and the minimizing relative settlement of digging interface 3, but geosynthetics is made up of the chemical substance that extracting in coal, oil, natural gas, its need of production consumes mass energy, can produce a large amount of waste residues, waste water and waste gas simultaneously, can cause like this expending and the pollution of environment of the energy, in the today of advocating energetically sustainable development, the material that we need to find a kind of energy-saving and environmental protection, low-carbon (LC) replaces; Geosynthetics construction cost is relatively high in addition.
For the anchoring of reinforcement material and the binding at superimposed position, often in tradition construction adopt the U-shaped holdfast of reinforcing bar and steel wire, but in subgrade construction, use steel mainly exist below three shortcomings: one, steel easy-to-rust in wet environment; Two, contaminated environment; Three, cost is higher.
Reinforcing traditional treatment method for the weak roadbed in embankment district can be classified as three classes: the first kind is to adopt discharging consolidation; Equations of The Second Kind is vertical reinforcement (such as plain concrete pile, cement mixing pile, the CFG stake etc.) consolidation process of utilizing without drain function.The 3rd class is to utilize vertical reinforcement (broken stone pile) consolidation process that has drain function.First kind method easy construction, cost are lower, foundation soil strength can improve gradually with the discharge of water, but construction period is longer; Equations of The Second Kind method can be applicable to all kinds of reinforced soft soil grounds, but cost is relatively high; The 3rd class methods easy construction, cost is low, but due to pile body self rigidity and intensity little, need to go along with sb. to guard him by surrounding soil could pile, when surrounding soil easily radial deformation occurs and produces and bloat and shear failure apart from the pile body within the scope of the 2～4m of stake top when weak, consolidation effect is limited.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of construction material environmental protection, simple in structure, easy construction, cost lower, can meet use the two-way enhancing of bamboo wood reinforcement of function and life requirement partly to fill out partly to dig weak roadbed construction method simultaneously.
In order to solve the problems of the technologies described above, the two-way enhancing of a kind of bamboo wood reinforcement provided by the invention is partly filled out and is partly dug weak roadbed construction method, comprises the following steps:
Step (1), use are through processing bamboo chip braiding bamboo reinforcement cage after treatment, bamboo reinforcement graticule mesh and making the U-shaped holdfast of bamboo reinforcement;
Step (2), place, smooth embankment district, carry out stake position setting-out;
Stake position setting-out place of the bamboo reinforcement cage making in step (3), use step (1) in step (2) made bamboo reinforcement cage Reinforced Gravel Pile as ground;
Step (4), at the domatic step excavation in natural hillside, step width is 2～3m, the height of every grade of step is 0.8～1.0m, and to make horizontal wall inscription value be 2～4% reverse horizontal wall inscription;
Step (5), employing rubble are material, the smooth hardcore bed that is 30～50cm at the prepared broken stone pile end face of step (3) laying depth;
Step (6), the bamboo reinforcement graticule mesh making in step (1) is entirely layed on hardcore bed, the superimposed length of adjacent two bamboo reinforcement graticule mesh is 30～50cm, and superimposed position adopts the binding of bamboo rattan to connect;
Step (7), backfill levelling filler grinding compacting in bamboo reinforcement graticule mesh, when filler is filled to when parallel with the contiguous step of upper level, on the contiguous step of upper level and the filler filled and led up up, re-lay lower one deck bamboo reinforcement graticule mesh, wherein to be layed in length on step identical with the width of bench excavation for bamboo reinforcement graticule mesh, the superimposed length of two bamboo reinforcement graticule mesh that same layer is adjacent is 30～50cm, superimposed position adopts the binding of bamboo rattan to connect, the bamboo reinforcement U-shaped holdfast that the bamboo reinforcement graticule mesh of completing makes every 0.8～1.2m and along road direction at vertical road direction respectively in step for 0.6～1.0m (1) is fixed on ground,
Step (8), repeating step (7), until reach design elevation of subgrade.
Described bamboo wood reinforcement enhancing is partly filled out and is partly dug weak roadbed construction method, and the step of use bamboo chip braiding bamboo reinforcement cage, bamboo reinforcement graticule mesh and the U-shaped holdfast of making bamboo reinforcement described in above-mentioned steps (1) is as follows:
Step 1., width that the mao bamboon that is not less than 3 years the length of time is made respectively for weaving the horizontal bamboo reinforcement of bamboo reinforcement cage and making bamboo reinforcement graticule mesh is 6～8mm, thickness is the bamboo chip of 4～6mm and is 15～20mm for weaving the width of the vertical bamboo reinforcement of bamboo reinforcement cage, the bamboo chip that thickness is 6～10mm;
Step is 2., first do sterilization, insect protected, preservative treatment to bamboo chip: the BAS that is 6～8% with boric acid and water configuration concentration, bamboo chip be impregnated in BAS, and make solution flood bamboo chip 3～5cm, leave standstill 24 hours; Then bamboo chip is taken out air-dry, natural air drying 5～7 days in the time that temperature is more than 20 DEG C, natural air drying 7～10 days in the time that temperature is below 20 DEG C; Then bamboo chip is done to waterproofing work: adopt hairbrush by the styrene-butadiene-styrence modified asphalt water-repellent paint brushing bamboo chip surface stirring evenly, brush altogether two layers, first floor brushing is complete treats 6～8 hours brushing second layers again, total coating thickness is controlled at 0.4～0.6mm, after 24 hours bamboo chip surface coatings are dry, enters step 3.;
Step 3., utilize bamboo chip after treatment to be compiled into bamboo reinforcement cage, bamboo reinforcement graticule mesh and make the U-shaped holdfast of bamboo reinforcement: the vertical long bamboo chip of 8 4～5m that adopts of bamboo reinforcement cage is evenly arranged on circumference, the diameter of bamboo reinforcement cage is with the diameter of broken stone pile, all around make stirrup parcel with bamboo chip again, the spacing of stirrup is 1～2cm; Each graticule mesh chip size of bamboo reinforcement graticule mesh is 15～20cm × 15～20cm, and the overall size of bamboo reinforcement graticule mesh adds step area with roadbed area, embankment district; The U-shaped holdfast of bamboo reinforcement comprises nail body and nail tip, and nail tip length is 30～40cm, and nail height is 3～4cm.
The described two-way enhancing of bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, when carrying out described in above-mentioned steps (2) stake position setting-out, be to be by every four pile body mid point lines the arranged in form stake position setting-out that square or every three pile body mid point lines are equilateral triangle.
The described two-way enhancing of bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, and the bamboo reinforcement cage reinforced rubble pile construction method described in above-mentioned steps (3) is:
First pile hole on ground, then vertically puts into bamboo reinforcement cage, and wherein bamboo reinforcement cage is positioned at broken stone pile top, inserts rubble through vertical bamboo reinforcement cage in stake hole, forms vertical bamboo reinforcement cage Reinforced Gravel Pile.
The described two-way enhancing of bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, makes embankment end is high near excavation end is low reverse horizontal wall inscription for strengthening the bond stress between reinforcement material and filler when step excavation described in above-mentioned steps (4).
The described two-way enhancing of bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, and the bed course described in above-mentioned steps (5) and broken stone pile filler used are rubble, sandstone or coarse sand, and the maximum particle diameter of particle is less than 5cm.
The described two-way enhancing of bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, when employing bamboo rattan binding described in above-mentioned steps (6) connects the superimposed position of bamboo reinforcement graticule mesh, before binding, first bamboo rattan is soaked in water, strengthen the fastness of binding so that the dry after-contraction of bamboo rattan becomes tight.
Technique effect of the present invention is:
(1) adopt novel bamboo reinforcement simultaneously to cut-fill subgrades level to vertically reinforce;
Level to: adopt horizontal bamboo reinforcement graticule mesh reinforcement can strengthen the globality of cut-fill subgrades, improve subgrade rating, reduce the relative settlement of embankment district and excavation zone, prevent that roadbed filling district from digging along filling out that interface slides, sidesway;
Vertical: broken stone pile top arranges bamboo reinforcement cage, can effectively limit like this pile body side direction and bloat distortion, prevent that pile body from bloating destruction and shear failure, improves the bearing capacity of broken stone pile greatly;
(2) broken stone pile and horizontal direction hardcore bed can form vertical horizontal to drainage system, in roadbed construction process, foundation soil is because of discharging consolidation effect, its intensity improves gradually, consolidation settlement major part completes, settlement after construction will further reduce, and can meet traffic loading increases the requirement to subgrade rating and distortion day by day;
(3) bamboo reinforcement raw material source is wide, renewable.In the present invention, muscle material all adopts reproducible bamboo wood, bamboo wood fast growth, the cycle of becoming a useful person is short, and output is large, originates secure, what is more important bamboo wood is green material, its manufacturing process environmental protection, pollution-free, adapt to the requirement of building trade towards low-carbon (LC), energy-saving and environmental protection and sustainable development;
(4) bamboo reinforcement is made simply, easy construction.In the present invention, bamboo wood can be gathered materials on the spot, and because bamboo wood density is little, from heavy and light, bamboo wood after treatment is transported to job site can be processed into rapidly bamboo reinforcement cage, bamboo reinforcement graticule mesh and the U-shaped holdfast of bamboo reinforcement;
(5) saving investment under the safe and reliable prerequisite of highway construction can met.With regard to intensity and cost, bamboo is acknowledged as the material that occurring in nature usefulness is the highest (as being the length of time that its tensile strength parallel to the grain of mao bamboon in 3 years is 150～250MPa, and the tensile strength of conventional geosynthetics geo-grid is 100～200MPa in engineering), meet the mechanics requirement of reinforcement material completely, bamboo reinforcement is carried out can meeting roadbed life requirement after sterilization, anticorrosion, insect protected and waterproofing work simultaneously, and than traditional muscle material expense is low can cost-saving minimizing investment.
Brief description of the drawings
Fig. 1 is two kinds of layout plans of broken stone pile of the present invention;
Fig. 2 is bamboo reinforcement cage schematic diagram of the present invention;
Fig. 3 is bamboo reinforcement graticule mesh schematic diagram of the present invention;
Fig. 4 is the U-shaped holdfast schematic diagram of bamboo reinforcement of the present invention;
Fig. 5 is that bamboo reinforcement graticule mesh of the present invention is laid schematic diagram;
Fig. 6 is that the present invention lays the schematic diagram after first floor bamboo reinforcement graticule mesh;
Fig. 7 is that the present invention lays the schematic diagram after second layer bamboo reinforcement graticule mesh;
Fig. 8 is that the present invention lays the 3rd layer of schematic diagram after bamboo reinforcement graticule mesh;
Fig. 9 is the schematic diagram after cut-fill subgrades completion of the present invention;
Wherein 1 is excavation zone, and 2 is embankment district, and 3 dig interface for filling out, 4 is bamboo reinforcement cage, and 5 is broken stone pile, and 6 is hardcore bed, 7 is bamboo reinforcement graticule mesh, 8 is step, and 9 is the U-shaped holdfast of bamboo reinforcement, and 10 is former natural hillside, 11 is road surface, 12 is the nail tip of the U-shaped holdfast of bamboo reinforcement, and 13 is the nail body of the U-shaped holdfast of bamboo reinforcement, and 14 is filler.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail
Embodiment 1:
Step (1), to use the length of time be that the mao bamboon bamboo wood of 4 years is made bamboo reinforcement cage 4 and bamboo reinforcement graticule mesh 7;
1., mao bamboon bamboo wood is made to width is 6mm, the bamboo reinforcement that thickness is 5mm, wherein for weaving the wide 16mm of bamboo chip of bamboo reinforcement cage 4 vertical bamboo reinforcements, thickness 6mm;
2., first bamboo reinforcement is done to sterilization, insect protected, preservative treatment: the BAS that is 8% with boric acid and water configuration concentration, bamboo reinforcement be impregnated in BAS, make solution flood bamboo reinforcement 5cm, leave standstill 24 hours; Then bamboo reinforcement is taken out air-dry under natural environment; Again bamboo reinforcement is done to waterproofing work: with styrene-butadiene-styrence modified asphalt water-repellent paint brushing bamboo chip surface, when brushing, first adopt hairbrush that modified waterproof asphalt material is evenly smeared and brushed in bamboo chip surface, Deng the brushing second layer again after the first floor dry tack free of brushing, total coating thickness is controlled at 0.4～0.6mm, and after 24 hours, bamboo reinforcement surface coating enters next procedure after being dried;
3., referring to Fig. 2, Fig. 3, Fig. 4, utilize bamboo chip after treatment be compiled into bamboo reinforcement cage, bamboo reinforcement graticule mesh and make the U-shaped holdfast of bamboo reinforcement: bamboo reinforcement cage 4 is vertical adopts 8 long bamboo chips of 5m to be evenly arranged on circumference, the diameter of bamboo reinforcement cage is with the diameter of broken stone pile 5, all around use stirrup (bamboo chip) parcel, the spacing of stirrup is 2cm again; Bamboo reinforcement graticule mesh 7 each graticule mesh chip size are 20cm × 20cm, and the overall size of bamboo reinforcement graticule mesh is: wide 7m × long 22m; Nail tip 12 length of U-shaped holdfast are 30cm, and nail body 13 is long is 3cm.
Step (2), place, smooth embankment district, carry out stake position setting-out according to pilespacing 1.6m by equilateral triangular arrangement in Fig. 1, and equilateral triangle claims again quincunx, refers to that three pile body mid point lines form equilateral triangle;
Conventional vibroflotation method pile hole on ground in step (3), the construction of utilization building pile body, broken stone pile 5 diameters are 0.9m, length is 15m, then vertically put into bamboo reinforcement cage 4, bamboo reinforcement cage is positioned at the top of pile body, in stake hole, insert rubble through vertical bamboo reinforcement cage, form vertical bamboo reinforcement cage Reinforced Gravel Pile, the diameter of pile body and length are determined according to the actual conditions of residing soft foundation;
Step (4), at the domatic step excavation 8 in former natural hillside 10, step width is 2.0m, the height of every grade of step is 1.0m, and makes that horizontal wall inscription value is that 3% close excavation end is low and reverse horizontal wall inscription that embankment end is high;
Step (5), employing rubble are that material (maximum particle diameter of particle is less than 5cm) is 30cm hardcore bed 6 at described broken stone pile 5 end face laying depths, require bed course compacting smooth, horizontal, remove spine thrust;
Step (6), referring to Fig. 6, lay bottom bamboo reinforcement graticule mesh 7 by design size: the bamboo reinforcement graticule mesh processing is layed on hardcore bed 6, laying is smooth, no wrinkle phenomenon, the superimposed length of adjacent two bamboo reinforcement graticule mesh is 35cm, and superimposed position ties solid with bamboo rattan, before binding, bamboo rattan is soaked in water, after bamboo rattan is dry, can shrinks and become tight, thus can bundle more firm;
Step (7), referring to Fig. 7, backfill levelling earth material grinding compacting in bamboo reinforcement graticule mesh 7, when filler 14 is filled to when parallel with the contiguous step of upper level, on the contiguous step of upper level and the filler 14 filled and led up up, re-lay lower one deck bamboo reinforcement graticule mesh, wherein to be layed in the length on step 8 be 2.0m to bamboo reinforcement graticule mesh, the superimposed length of two bamboo reinforcement graticule mesh that same layer is adjacent is 35cm, connecting portion ties solid with bamboo rattan, the bamboo reinforcement graticule mesh of completing every 1m, is fixed on ground every 0.8m with bamboo reinforcement U-shaped holdfast 9 along road direction at vertical road direction;
Step (8), referring to Fig. 8, Fig. 9, then repeating step (7), re-lays road surface 11 until reach roadbed elevation of top surface.
Embodiment 2:
Step (1), to use the length of time be that the mao bamboon bamboo wood of 3 years is made bamboo reinforcement cage 4 and bamboo reinforcement graticule mesh 7;
1., mao bamboon bamboo wood is made to width is 7mm, the bamboo chip that thickness is 6mm, wherein for weaving the wide 20mm of bamboo chip of the vertical bamboo reinforcement of bamboo reinforcement cage, thickness 8mm;
2., first bamboo chip is done to sterilization, insect protected, preservative treatment: the BAS that is 6% with boric acid and water configuration concentration, bamboo chip be impregnated in BAS, make solution flood bamboo reinforcement 5cm, leave standstill 24 hours; Then bamboo chip is taken out to natural air drying; Again bamboo chip is done to waterproofing work: with styrene-butadiene-styrence modified asphalt water-repellent paint brushing bamboo reinforcement surface, brush altogether two layers, Deng the brushing second layer again after first floor brushing bamboo chip dry tack free, total coating thickness is controlled at 0.4～0.6mm, and after 24 hours, bamboo reinforcement surface coating enters next procedure after being dried;
3., referring to Fig. 2, Fig. 3, Fig. 4, utilize bamboo chip after treatment be woven into bamboo reinforcement cage, bamboo reinforcement graticule mesh and make the U-shaped holdfast of bamboo reinforcement: bamboo reinforcement cage 4 is vertical adopts 8 long bamboo reinforcements of 4.5m to be evenly arranged on circumference, the diameter of bamboo reinforcement cage is with the diameter of broken stone pile 5, all around use stirrup (bamboo chip) parcel, the spacing of stirrup is 1.5cm again; Bamboo reinforcement graticule mesh 7 each graticule mesh chip size are 15cm × 15cm, and the overall size of bamboo reinforcement graticule mesh is: wide 8.2m × long 35m; Nail tip (12) length of the U-shaped holdfast of bamboo reinforcement is 35cm, and nail body (13) is long is 3cm.
Step (2), place, smooth embankment district, carry out stake position setting-out according to pilespacing 1.2m by arranged in squares in Fig. 1, and arranged in squares refers to that four pile body mid point lines form square;
Conventional immersed tunnelling method pile hole on ground in step (3), the construction of utilization building pile body, broken stone pile 5 diameters are 0.6m, length is 10m, then vertically put into bamboo reinforcement cage 4, bamboo reinforcement cage is positioned at the top of pile body, in stake hole, insert rubble through vertical bamboo reinforcement cage, form vertical bamboo reinforcement cage Reinforced Gravel Pile, the diameter of pile body and length are determined according to the actual conditions of residing soft foundation;
Step (4), on natural hillside domatic step excavation 8, step width is 2.2m, the height of every grade of step is 0.8m, and makes that horizontal wall inscription value is that 4% close excavation end is low and reverse horizontal wall inscription that embankment end is high;
Step (5), employing rubble are that material (maximum particle diameter of particle is less than 5cm) is 50cm hardcore bed 6 at described broken stone pile 5 end face laying depths, require bed course compacting smooth, horizontal, remove spine thrust;
Step (6), referring to Fig. 6, lay bottom bamboo reinforcement graticule mesh 7 by design size: the bamboo reinforcement graticule mesh processing is layed on hardcore bed 6, laying is smooth, no wrinkle phenomenon, the superimposed length of adjacent two bamboo reinforcement graticule mesh is 40cm, and superimposed position ties solid with bamboo rattan, before binding, bamboo rattan is soaked in water, after bamboo rattan is dry, can shrinks and become tight, thus can bundle more firm;
Step (7), referring to Fig. 7, backfill levelling earth material grinding compacting in bamboo reinforcement graticule mesh 7, when filler 14 is filled to when parallel with the contiguous step of upper level, on the contiguous step of upper level and the filler 14 filled and led up up, re-lay lower one deck bamboo reinforcement graticule mesh, wherein to be layed in the length on step 8 be 2.2m to bamboo reinforcement graticule mesh, the superimposed length of two bamboo reinforcement graticule mesh that same layer is adjacent is 40cm, connecting portion ties solid with bamboo rattan, the bamboo reinforcement graticule mesh of completing every 1.2m, is fixed on ground every 1.0m with bamboo reinforcement U-shaped holdfast 9 along road direction at vertical road direction;
Step (8), referring to Fig. 8, Fig. 9, then repeating step (7), re-lays road surface 11 until reach roadbed elevation of top surface.
Claims (5)
1. the two-way enhancing of bamboo wood reinforcement is partly filled out and is partly dug a weak roadbed construction method, it is characterized in that: comprise the following steps:
Step (1), use through processing bamboo chip after treatment braiding bamboo reinforcement cage, bamboo reinforcement graticule mesh and making the U-shaped holdfast of bamboo reinforcement, braiding step comprises:
Step 1., width that the mao bamboon that is not less than 3 years the length of time is made respectively for weaving the horizontal bamboo reinforcement of bamboo reinforcement cage and making bamboo reinforcement graticule mesh is 6～8mm, thickness is the bamboo chip of 4～6mm, and be 15～20mm for weaving the width of the vertical bamboo reinforcement of bamboo reinforcement cage, the bamboo chip that thickness is 6～10mm;
Step is 2., first do sterilization, insect protected, preservative treatment to bamboo chip: the BAS that is 6～8% with boric acid and water configuration concentration, bamboo chip be impregnated in BAS, and make solution flood bamboo chip 3～5cm, leave standstill 24 hours; Then bamboo chip is taken out air-dry, natural air drying 5～7 days in the time that temperature is more than 20 DEG C, natural air drying 7～10 days in the time that temperature is below 20 DEG C; Then bamboo chip is done to waterproofing work: adopt hairbrush by the styrene-butadiene-styrence modified asphalt water-repellent paint brushing bamboo chip surface stirring evenly, brush altogether two layers, first floor brushing is complete treats 6～8 hours brushing second layers again, total coating thickness is controlled at 0.4～0.6mm, after 24 hours bamboo chip surface coatings are dry, enters step 3.;
Step 3., utilize bamboo chip after treatment to be compiled into bamboo reinforcement cage, bamboo reinforcement graticule mesh and make the U-shaped holdfast of bamboo reinforcement: the vertical long bamboo chip of 8 4～5m that adopts of bamboo reinforcement cage is evenly arranged on circumference, the diameter of bamboo reinforcement cage is with the diameter of broken stone pile, all around make stirrup parcel with bamboo chip again, the spacing of stirrup is 1～2cm; Each graticule mesh chip size of bamboo reinforcement graticule mesh is 15～20cm × 15～20cm, and the overall size of bamboo reinforcement graticule mesh adds step area with roadbed area, embankment district; The U-shaped holdfast of bamboo reinforcement comprises nail body and nail tip, and nail tip length is 30～40cm, and nail height is 3～4cm;
Step (2), place, smooth embankment district, carry out the setting-out of stake position;
Step (3), use bamboo reinforcement cage that step makes in (1) in step stake position setting-out place in (2) make bamboo reinforcement cage Reinforced Gravel Pile as ground, bamboo reinforcement cage reinforced rubble pile construction method is:
First pile hole on ground, then vertically puts into bamboo reinforcement cage, and wherein bamboo reinforcement cage is positioned at broken stone pile top, inserts rubble through vertical bamboo reinforcement cage in stake hole, forms vertical bamboo reinforcement cage Reinforced Gravel Pile;
Step (4), at the domatic step excavation in natural hillside, step width is 2～3m, the height of every grade of step is 0.8～1.0m, and to make horizontal wall inscription value be 2～4% reverse horizontal wall inscription;
Step (5), employing rubble is material, at the step smooth hardcore bed that (3) prepared broken stone pile end face laying depth is 30～50cm;
Step (6), bamboo reinforcement graticule mesh that step is made in (1) is entirely layed on hardcore bed, and the superimposed length of adjacent two bamboo reinforcement graticule mesh is 30～50cm, and superimposed position adopts the binding of bamboo rattan to connect;
Step (7), backfill levelling filler grinding compacting in bamboo reinforcement graticule mesh, when filler is filled to when parallel with the contiguous step of upper level, on the contiguous step of upper level and the filler filled and led up up, re-lay lower one deck bamboo reinforcement graticule mesh, wherein to be layed in length on step identical with the width of bench excavation for bamboo reinforcement graticule mesh, the superimposed length of two bamboo reinforcement graticule mesh that same layer is adjacent is 30～50cm, superimposed position adopts the binding of bamboo rattan to connect, the bamboo reinforcement U-shaped holdfast that the bamboo reinforcement graticule mesh of completing makes in (1) every 0.6～1.0m step every 0.8～1.2m and along road direction at vertical road direction is respectively fixed on ground,
Step (8), repeating step (7), until reach design elevation of subgrade.
2. the two-way enhancing of bamboo wood reinforcement according to claim 1 is partly filled out and is partly dug weak roadbed construction method, it is characterized in that: when the setting-out of carrying out described in above-mentioned steps (2) stake position, be to be by every four pile body mid point lines the arranged in form stake position setting-out that square or every three pile body mid point lines are equilateral triangle.
3. the two-way enhancing of bamboo wood reinforcement according to claim 1 is partly filled out and is partly dug weak roadbed construction method, it is characterized in that: when the step excavation of above-mentioned steps described in (4), make embankment end is high near excavation end is low reverse horizontal wall inscription for the bond stress between reinforcer and reinforcement material.
4. the two-way enhancing of bamboo wood reinforcement according to claim 1 is partly filled out and is partly dug weak roadbed construction method, it is characterized in that: bed course and the broken stone pile used filler of above-mentioned steps described in is (5) rubble, sandstone or coarse sand, and the maximum particle diameter of particle is less than 5cm.
5. the two-way enhancing of bamboo wood reinforcement according to claim 1 is partly filled out and is partly dug weak roadbed construction method, it is characterized in that: when the employing bamboo rattan binding of above-mentioned steps described in (6) connects the superimposed position of bamboo reinforcement graticule mesh, before binding, first bamboo rattan is soaked in water, strengthen the fastness of binding so that the dry after-contraction of bamboo rattan becomes tight.
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| CN110284386A (en) * | 2019-06-28 | 2019-09-27 | 中国二十冶集团有限公司 | Improve the method for the soft soil roadbed intensity of peat soil |
| CN110965416B (en) * | 2019-11-26 | 2023-06-30 | 湖南工业大学 | Bamboo reinforcement system for reinforcing mountain area high-fill roadbed and construction method |
| CN111304993A (en) * | 2020-03-17 | 2020-06-19 | 长沙理工大学 | Road surface adds muscle structure |
| CN112195909A (en) * | 2020-10-20 | 2021-01-08 | 云南建投第一勘察设计有限公司 | Method for reinforcing soft foundation of road and parking lot |
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| CN2519819Y (en) * | 2001-11-22 | 2002-11-06 | 水利部交通部电力工业部南京水利科学研究院 | Solidified foundation with horizontal water drainage board |
| CN1560378A (en) * | 2004-03-09 | 2005-01-05 | 徐土龙 | Method of processing soft foundation by quick low position high vacuum layering pre-compacting consolidation |
| CN1818227A (en) * | 2006-03-07 | 2006-08-16 | 张志铁 | Combined method for fastening soft soil ground by dual vacuum prepressing and dynamic extruding method |
| JP2008002225A (en) * | 2006-06-26 | 2008-01-10 | Kinugawa Tekkosho:Kk | Water absorbing/retaining carbide-coated aggregate and water absorbing/retaining paving material using the same |
| CN102021871A (en) * | 2009-09-15 | 2011-04-20 | 中国石油化工集团公司 | Foundation treatment method for temporary construction subgrade on dredge fill soft foundation site |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2519819Y (en) * | 2001-11-22 | 2002-11-06 | 水利部交通部电力工业部南京水利科学研究院 | Solidified foundation with horizontal water drainage board |
| CN1560378A (en) * | 2004-03-09 | 2005-01-05 | 徐土龙 | Method of processing soft foundation by quick low position high vacuum layering pre-compacting consolidation |
| CN1818227A (en) * | 2006-03-07 | 2006-08-16 | 张志铁 | Combined method for fastening soft soil ground by dual vacuum prepressing and dynamic extruding method |
| JP2008002225A (en) * | 2006-06-26 | 2008-01-10 | Kinugawa Tekkosho:Kk | Water absorbing/retaining carbide-coated aggregate and water absorbing/retaining paving material using the same |
| CN102021871A (en) * | 2009-09-15 | 2011-04-20 | 中国石油化工集团公司 | Foundation treatment method for temporary construction subgrade on dredge fill soft foundation site |
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