CN106368093A - Construction method of high-polymer grouting-reinforced anti-settlement widened roadbed - Google Patents
Construction method of high-polymer grouting-reinforced anti-settlement widened roadbed Download PDFInfo
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- CN106368093A CN106368093A CN201610995290.7A CN201610995290A CN106368093A CN 106368093 A CN106368093 A CN 106368093A CN 201610995290 A CN201610995290 A CN 201610995290A CN 106368093 A CN106368093 A CN 106368093A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C21/00—Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0084—Geogrids
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- General Life Sciences & Earth Sciences (AREA)
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- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a construction method of a high-polymer grouting-reinforced anti-settlement widened roadbed. The construction method is characterized in that a geotextile pipe network is arranged, wherein the geotextile pipe network is composed of rectangular meshes formed by PVC pipes and arranged in an array, and the PVC pipes in the rectangular meshes are communicated with one another; grouting holes protruding upwards, exhaust holes protruding upwards and grout passing holes protruding downwards are formed in the geotextile pipe network; geotextile pipe network is laid in an earth fill layer to form an earth fill layer geotextile pipe network, high-polymer grout is injected into the earth fill layer geotextile pipe network through the grouting holes to form an earth fill layer grouted geotextile pipe network, and high-polymer grout is also injected into vertical column holes formed in the earth fill layer through the grout passing holes to form vertical reinforcing columns. Lateral linkage between a new embankment and an old embankment is enhanced, differential settlement is effectively controlled, binding of the new embankment and the old embankment is more stable, and slumping is not likely to occur.
Description
Technical field
The present invention relates to the construction method that the embankment in highway widening transformation is widened, more specifically a kind of high polymer note
The construction method of slurry reinforcement anti-settling widening subgrade.
Background technology
With the sustained and rapid development of national economy, the highway transportation quantity required of China increases year by year, some existing public affairs
The traffic flow on road has reached saturation, needs badly and it is carried out widen transformation to improve its traffic capacity, and then adapts to modern warp
The fast-developing needs of Ji.
Roadbed widening is the major way to existing highway dilatation enlarging.Due to the difference between new, old road base with mutually
Effect, the road disease that roadbed widening causes and the decline of road surface overall performance are rather common in Practical Project, have a strong impact on
Traffic safety and comfortableness.In prior art, the subject matter that presence widened by embankment includes:
1st, relative settlement: in old embankment under heavy load effect, the ground under old embankment sinks through consolidation deformation for many years
Fall terminates substantially, and it is quite different newly to widen side ground.Fill on the old roadbed of differing heights differing heights soil layer when, will appear from
The phenomenon of the road surface longitudinal cracking of the differential settlement of ground and its initiation under new-old concrete bond.
2nd, destroy sliding at new and old road embankment loading: in current engineering practice, in order to strengthen the company between new-old concrete bond
Connect, reduce relative settlement, conventional method is by the slope excavating step of existing roadbed, lays GSZ or use light filler
Fill the measures such as widened section roadbed.Geotechnique is laid after step excavation or step excavation on the step of new-old concrete bond joining place
Grid, using the reinforced action of GSZ, can strengthen the connection between new-old concrete bond to a certain extent, reduce new-old concrete bond
Between relative settlement.But potential sliding surface can be formed after step excavation, be likely to result in widened section roadbed and laterally slide
Move；
3rd, side slope slump: after the completion of new embankment, higher or the gradient is larger for side slope, slope protection measures are not
Obtain and be also easy to produce side slope slump at once.
Content of the invention
The present invention is for avoiding the deficiency existing for above-mentioned prior art, providing a kind of high polymer grouting reinforcement anti-settling high
The construction method of embankment widening subgrade, so as to effectively strengthening the lateral ties between new and old embankment, controls new and old embankment
Relative settlement；Make more firm at new and old road embankment loading, be difficult slump.
The present invention is to solve technical problem to adopt the following technical scheme that
The feature of the construction method of the high embankment widening subgrade of high polymer grouting reinforcement anti-settling of the present invention is:
The structure of the setting high embankment widening subgrade of high polymer grouting reinforcement anti-settling is:
The geotechnological pipe network of setting, is the rectangular mesh being arranged in array being made up of pvc pipe, the pvc pipe phase in rectangular mesh
Intercommunicated；It is respectively arranged with the injected hole protruding out upwards and steam vent, and the slurry excessively protruding out downwards in described geotechnique's pipe network
Hole；
Described geotextile tube net laying is located in fill stratum and forms fill stratum geotechnique's pipe network, and high polymer slurry passes through described injected hole
To fill stratum geotechnique pipe network in slip casting formed fill stratum slip casting geotechnique pipe network, described high polymer slurry also by described cross slurry hole to
It is formed in slip casting in the vertical post holes in fill stratum and form vertical reinforced column；
The interface arranging old roadbed with new roadbed is step interface, and described fill stratum is pressed corresponding one in step interface
The highl stratification of layer step fills compacting, forms layering of respectively banketing, geotextile tube net laying be located at each layer banket layering top surface simultaneously
Extend in geotechnological pipe network between corresponding one layer of step top surface cambium layer；For interlayer geotechnique's pipe network, slip casting shape is passed through with high polymer slurry
Slip casting geotechnique pipe network between stratification, and form vertical interlayer reinforced column, described vertical interlayer reinforced column is distributed in step surface neutralization
Banket in layering；
Described geotextile tube net laying is located in side slope and forms side slope geotechnique's pipe network, starched with high polymer for side slope geotechnique's pipe network
Material forms side slope slip casting geotechnique's pipe network by slip casting, and forms the slope reinforcement stake vertical with side slope face；
Described construction method is to carry out as follows:
Step 1: from top to bottom excavated for old roadbed, form step interface；Connect with step interface, and press
The highl stratification of monolayer step surface fills compacting formation and bankets layering；
Step 2: on the surface of layering of banketing and vertical post holes is drilled through respectively on corresponding one layer of step surface；
Step 3: the surface of described layering of banketing and on corresponding one layer of step surface laying interlayer geotechnique pipe network, and
Slurry hole of crossing in described interlayer geotechnique's pipe network is docked one by one with the vertical post holes on correspondence position, using bail to interlayer geotechnique
Pipe network is positioned, and fills the thick embankment soil of one layer of 40mm～50mm on the net in the interlayer geotextile tube laid, and keeps soil
Injected hole in work pipe network and steam vent are to protrude out upwards and are unobstructed；
Step 4: by the order of layering of banketing after first step surface, high polymer slurry is passed sequentially through injected hole to interlayer geotechnique
Carry out slip casting in pipe network, and passed through slurry hole to slip casting in vertical post holes, form interlayer slip casting geotechnique's pipe network and each vertical respectively
Interlayer reinforced column, completes the construction of monolayer reinforced structure；
Step 5: from bottom to top, it is layered by the height of every layer of step surface, each monolayer reinforced structure of constructing one by one, until
Fill stratum all fills compacting；
Step 6: side slope geotechnique's pipe network is laid on side slope, makes crossing on slurry hole and correspondence position in side slope geotechnique's pipe network
Oblique post holes is docked one by one, is positioned using bail side slope geotechnique's pipe network；High polymer slurry is passed through injected hole to side slope
Carry out slip casting in geotechnological pipe network, and passed through slurry hole to slip casting in oblique post holes, formed by side slope slip casting geotechnique's pipe network and side slope
The slope protection structure that reinforced column is constituted, completes the construction of high polymer grouting reinforcement anti-settling widening subgrade.
The feature of the construction method of the high embankment widening subgrade of high polymer grouting reinforcement anti-settling of the present invention lies also in:
Length of side l of rectangular mesh in described interlayer geotechnique's pipe network1For 0.4m～0.6m, the diameter d of pvc pipe1For 18～
22mm；
Length of side l of rectangular mesh in described side slope geotechnique's pipe network2For,The diameter d of pvc pipe2For:Wherein, α is the angle of side slope；
Described vertical interlayer reinforced column has two rows in step, has 3～5 rows, adjacent vertical interlayer adds in layering of banketing
Gu the spacing of post be 0.4m～0.6m, a diameter of 16～20mm of each vertical interlayer reinforced column (3d), apart from side slope nearest one
The length arranging vertical interlayer reinforced column is (2.4～2.6) × h, other respectively arrange vertical interlayer reinforced column length be (1.4～
1.6) × h, h are the height of corresponding one layer of step surface；
The distribution of described slope reinforcement post is: multiple rows of slope reinforcement post is arranged from bottom to top by the toe of embankment, minimum one
The distance apart from side slope base for the capital of row's slope reinforcement post is l2, the spacing between the capital of adjacent two row's slope reinforcement posts is also
For l2, a diameter of 16～20mm of slope reinforcement post, length d of jth row slope reinforcement postjFor:
When j=1～3, dj=1.4jl2tanα；
When j is more than 3, dj=d3, j is natural number；
In described step interface, the height of step is 0.8m～1.0m, and the width of step is 2m～2.5m.
Compared with prior art, the present invention has the beneficial effect that:
1st, after slip casting terminates, high polymer grouting material expands rapidly reaction to the present invention, spreads until filling out to surrounding
Full geotechnique's pipe network and post holes, effectively strengthen the lateral ties between new and old embankment using slip casting geotechnique's pipe network and reinforced column, and have
Effect controls the relative settlement of new and old embankment.
2nd, after slip casting terminates, high polymer grouting material expands in geotechnological pipe network and post holes and spreads and formed by force the present invention
Degree, the entirety making fill stratum, geotechnological pipe network combine with slope interface or the formation of step interface, effectively strengthen potential cunning
Dynamic face, makes new-old concrete bond junction more firm, is difficult slump.
3rd, the present invention is combined by reinforcing pile between ground, geotechnological pipe network and side slope, is formed in length and breadth in embankment
Staggered three-dimensional pipe network structure is it is achieved that effective side slope protection.
4th, in the present invention, high polymer material is filled with the soil body hole around post holes simultaneously, consolidates new roadbed, the old road of reinforcement
Base.
5th, in the present invention, geotechnological pipe network is formed in one, and work progress is quick, convenient.
Brief description
Fig. 1 applies the embankment widened structure schematic diagram in light fill for the present invention；
Fig. 2 applies the embankment widened structure schematic diagram in general embankment or high embankment for the present invention；
Fig. 3 is the geotextile tube network plane structural representation being layed in fill stratum surface in the present invention；
Fig. 4 is the geotextile tube network plane structural representation being layed in side slope in the present invention；
Fig. 5 is a-a view in Fig. 3；
Fig. 6 is b-b view in Fig. 3；
In figure label: 1 fill stratum, 2 geotechnological pipe networks, 2a fill stratum slip casting geotechnique's pipe network, 2b interlayer slip casting geotechnique's pipe network, 2c
Side slope slip casting geotechnique's pipe network, 3a vertical fill stratum reinforced column, 3b vertical strengthening of road shoulder post, 3c slope reinforcement post, the vertical interlayer of 3d
Reinforced column, 4a slope interface, 4b step interface, 5 is pvc pipe, and 6 cross slurry hole, 7 injected holes, 8 steam vents, 9 dividing plates, 10 soil
Work grid, 11 bails.
Specific embodiment
Referring to Fig. 1 and Fig. 2, the version of high polymer grouting reinforcement anti-settling widening subgrade of the present invention is:
The geotechnological pipe network 2 of setting, is the rectangular mesh being arranged in array being made up of pvc pipe 5, the pvc pipe 5 in rectangular mesh
It is interconnected；It is respectively arranged with the injected hole 7 protruding out upwards and steam vent 8, and the slurry excessively protruding out downwards in geotechnological pipe network 2
Hole 6.
By geotechnological pipe network 2 be laid in fill stratum 1 formed fill stratum geotechnique pipe network, high polymer slurry pass through injected hole 7 to
In fill stratum geotechnique's pipe network, slip casting forms fill stratum slip casting geotechnique pipe network 2a, and high polymer slurry is also by crossing slurry hole 6 to being formed in
Slip casting in vertical post holes in fill stratum 1 forms vertical reinforced column.
Referring to Fig. 3, Fig. 4, Fig. 5 and Fig. 6, geotechnological pipe network 2 is the global formation pipe network with pvc as material, in geotechnological pipe network 2
In dividing plate 9 is distributed with, using dividing plate 9, geotechnological pipe network 2 is divided into separate each region, in each region include at least have
One injected hole 7, equally distributed multiple steam vents 8, and cross slurry hole 6 by the multiple of setting position distribution；In fill stratum geotechnique
It is provided with GSZ 10, GSZ 1 is integrally formed with pvc pipe 5, with GSZ 10 in rectangle in the rectangular mesh of pipe network
As reinforcement contact in grid；Cross slurry hole 6 and injected hole 7 is arranged on the site position of rectangular mesh of geotechnological pipe network 2.
In being embodied as, volumetric usage q of the high polymer grouting material in separate each region is: q=v × b/a, its
In: a is the expansion multiplying power of high polymer grouting material, a=5～25；B is excessive slip casting coefficient, b=1.05～1.10；V is respective area
The slip casting capacity in domain.
Embodiment 1:
The present embodiment high polymer grouting reinforcement anti-settling widening subgrade is to be implemented for light fill, and light fill is to show the way
Dike is highly not more than the embankment of 1.5m.
As shown in figure 1, being directed to light fill, the interface arranging old roadbed with new roadbed is slope interface 4a, fill stratum 1
By depth of fill placement in layers compacting, geotextile tube net laying is located at the top surface of fill stratum 1；Led to high polymer slurry for geotechnological pipe network
Cross slip casting and form fill stratum slip casting geotechnique pipe network 2a, and formation runs through slope interface 4a and extends to vertically filling out in ground
Soil layer reinforced column 3a；Geotechnological pipe network is extended with curb geotechnique's pipe network on old roadbed, is starched with high polymer for curb geotechnique's pipe network
Material forms curb slip casting geotechnique's pipe network by slip casting, and forms the vertical strengthening of road shoulder post 3b being embedded in curb.
In the present embodiment, corresponding structure setting also includes:
In fill stratum geotechnique's pipe network, the length of side of rectangular mesh is 0.4m～0.6m, a diameter of 18～22mm of pvc pipe.
In each reinforced column including vertical fill stratum reinforced column 3a and vertical strengthening of road shoulder post 3b, between adjacent reinforced column
Away from a diameter of 16～20mm for 0.4m～0.6m, each reinforced column, the length of vertical strengthening of road shoulder post 3b is 0.6～0.8 × h,
The length of vertical fill stratum reinforced column 3a is 1.2～1.4 × h, and h is depth of fill.
The construction method that in the present embodiment, high polymer grouting reinforcement anti-settling widening subgrade is directed to light fill is to walk by following
Suddenly constructed:
Step 1: from top to bottom excavated for old roadbed, form slope, from top to bottom clear up tiltedly for old roadbed
Domatic, remove weeds and rubble；Fill stratum 1 is layered, is successively filled, and be successively compacted using vibratile compacter,
Until complete fill stratum 1 fills compacting, and form slope interface 4a；
Step 2: on the curb of old roadbed, and drill through vertical post holes respectively on the surface of fill stratum 1；
Step 3: on curb and in the surface of fill stratum 1 laying fill stratum geotechnique's pipe network, and by fill stratum geotextile tube
Slurry hole 6 of crossing in net is docked one by one with the vertical post holes on correspondence position, and it is fixed using bail 11, fill stratum geotechnique's pipe network to be carried out
Position；
Step 4: from old roadbed side, and successively towards new roadbed side, high polymer slurry is passed through injected hole to filling out
Carry out slip casting in soil layer geotechnique's pipe network, and passed through slurry hole to slip casting in vertical post holes, form fill stratum slip casting geotextile tube respectively
Net 2a, vertical fill stratum reinforced column 3a and vertical strengthening of road shoulder post 3b, complete high polymer grouting reinforcement anti-settling widening subgrade
Construction.
Embodiment 2:
In the present embodiment, high polymer grouting reinforcement anti-settling widening subgrade is for general embankment or high embankment, general embankment
Refer to embankment between 1.5m to 18m for the depth of fill, high embankment refers to that depth of fill is not less than the embankment of 18m.
As shown in Fig. 2 being directed to general embankment or high embankment: the interface arranging old roadbed with new roadbed is step interface
4b, fill stratum 1 fills compacting by the highl stratification of corresponding one layer of step in step interface 4b, forms layering of respectively banketing, geotechnique
Pipe network is laid on each layer and bankets the top surface of layering extend in geotechnological pipe network between corresponding one layer of step top surface cambium layer；For layer
Between geotechnological pipe network interlayer slip casting geotechnique pipe network 2b is formed by slip casting with high polymer slurry, and the vertical interlayer reinforced column of formation
3d, vertical interlayer reinforced column 3d are distributed in step surface neutralization and banket in layering.
Geotextile tube net laying is located in side slope and forms side slope geotechnique's pipe network, led to high polymer slurry for side slope geotechnique's pipe network
Cross slip casting and form side slope slip casting geotechnique pipe network 2c, and form the slope reinforcement stake 3c vertical with side slope face.
In the present embodiment, corresponding structure setting also includes:
Length of side l of rectangular mesh in interlayer geotechnique's pipe network1For 0.4m～0.6m, the diameter d of pvc pipe1For 18～22mm.
Length of side l of rectangular mesh in side slope geotechnique's pipe network2For,The diameter d of pvc pipe2For:Wherein, α is the angle of side slope.
Vertical interlayer reinforced column 3d has two rows in step, has 3～5 rows in layering of banketing, and adjacent vertical interlayer is reinforced
The spacing of post 3d is 0.4m～0.6m, and a diameter of 16～20mm of each vertical interlayer reinforced column 3d, apart from the nearest row of side slope
The length of vertical interlayer reinforced column is 2.4～2.6 × h, and other length respectively arranging vertical interlayer reinforced column are 1.4～1.6 × h, h
Height for corresponding one layer of step surface.
The distribution of slope reinforcement post 3c is: arranges multiple rows of slope reinforcement post, a minimum row from bottom to top by the toe of embankment
The distance apart from side slope base for the capital of slope reinforcement post is l2, the spacing between the capital of adjacent two row's slope reinforcement posts is also
l2, a diameter of 16～20mm of slope reinforcement post, length d of jth row slope reinforcement postjFor:
When j=1～3, dj=1.4jl2tanα；
When j is more than 3, dj=d3, j is natural number；
In step interface 4b, the height of step is 0.8m～1.0m, and the width of step is 2m～2.5m.
In the present embodiment, high polymer grouting reinforcement anti-settling widening subgrade is directed to the construction method of general embankment and high embankment
Constructed as follows:
Step 1: from top to bottom excavated for old roadbed, form step interface 4b；Connect with step interface 4b,
And fill compacting formation by the highl stratification of monolayer step surface and banket layering；
Step 2: on the surface of layering of banketing and vertical post holes is drilled through respectively on corresponding one layer of step surface；
Step 3: the surface of layering of banketing and on corresponding one layer of step surface laying interlayer geotechnique's pipe network, and by layer
Between slurry hole 6 of crossing in geotechnological pipe network dock one by one with the vertical post holes on correspondence position, using bail 11 to interlayer geotechnological pipe network
Positioned, and filled the thick embankment soil of one layer of 40mm～50mm on the net in the interlayer geotextile tube laid, kept geotextile tube
Injected hole 7 in net and steam vent 8 are to protrude out upwards and are unobstructed；
Step 4: by the order of layering of banketing after first step surface, high polymer slurry is passed sequentially through injected hole to interlayer geotechnique
Carry out slip casting in pipe network, and passed through slurry hole to slip casting in vertical post holes, form interlayer slip casting geotechnique pipe network 2b and each perpendicular respectively
To interlayer reinforced column 3d, complete the construction of monolayer reinforced structure；i
Step 5: from bottom to top, it is layered by the height of every layer of step surface, each monolayer reinforced structure of constructing one by one, until
Fill stratum 1 all fills compacting；
Step 6: laying side slope geotechnique's pipe network in side slope, make crossing on slurry hole 6 and correspondence position in side slope geotechnique's pipe network
Oblique post holes dock one by one, using bail 11 side slope geotechnique pipe network positioned；By high polymer slurry pass through injected hole to
Carry out slip casting in side slope geotechnique's pipe network, and passed through slurry hole to slip casting in oblique post holes, formed by side slope slip casting geotechnique pipe network 2c
The slope protection structure constituting with slope reinforcement post 3c, completes the construction of high polymer grouting reinforcement anti-settling widening subgrade.
It is the construction completing fill stratum with step 1 to step 5 in the present embodiment；Then complete slope construction by step 6；If
It is that depth of fill reaches 8m, by the shoulder height of 1.0～1.5m, its step surface will reach 5～8 grades, therefore, often complete 5～6
After the construction of layer fill stratum, carry out side slope slip casting protection, so can ensure that the stable of side slope of embankment it is ensured that construction is pacified
Entirely.
Claims (2)
1. the construction method of the high embankment widening subgrade of a kind of high polymer grouting reinforcement anti-settling, is characterized in that:
The structure of the setting high embankment widening subgrade of high polymer grouting reinforcement anti-settling is:
The geotechnological pipe network (2) of setting, is the rectangular mesh being arranged in array being made up of pvc pipe (5), the pvc pipe in rectangular mesh
(5) it is interconnected；It is respectively arranged with the injected hole (7) protruding out upwards and steam vent (8) in described geotechnique's pipe network (2), and
Protrude out downwards crosses slurry hole (6)；
Described geotechnique's pipe network (2) is laid in fill stratum (1) and forms fill stratum geotechnique's pipe network, and high polymer slurry is by described slip casting
Hole (7) forms fill stratum slip casting geotechnique's pipe network (2a) to slip casting in fill stratum geotechnique's pipe network, and described high polymer slurry is also by institute
State slurry hole (6) and form vertical reinforced column to slip casting in the vertical post holes being formed in fill stratum (1)；
The interface arranging old roadbed with new roadbed is step interface (4b), and described fill stratum (1) presses step interface (4b)
In the highl stratification of corresponding one layer of step fill compacting, form layering of respectively banketing, geotextile tube net laying is located at each layer and bankets layering
Top surface and extend between corresponding one layer of step top surface cambium layer geotechnological pipe network；Led to high polymer slurry for interlayer geotechnique's pipe network
Cross slip casting and form interlayer slip casting geotechnique's pipe network (2b), and form vertical interlayer reinforced column (3d), described vertical interlayer reinforced column
(3d) it is distributed in step surface neutralization to banket in layering；
Described geotextile tube net laying is located in side slope and forms side slope geotechnique's pipe network, led to high polymer slurry for side slope geotechnique's pipe network
Cross slip casting and form side slope slip casting geotechnique's pipe network (2c), and form the slope reinforcement stake 3c vertical with side slope face；
Described construction method is to carry out as follows:
Step 1: from top to bottom excavated for old roadbed, form step interface (4b)；Connect with step interface (4b),
And fill compacting formation by the highl stratification of monolayer step surface and banket layering；
Step 2: on the surface of layering of banketing and vertical post holes is drilled through respectively on corresponding one layer of step surface；
Step 3: the surface of described layering of banketing and on corresponding one layer of step surface laying interlayer geotechnique's pipe network, and by institute
The slurry hole (6) of crossing stated in interlayer geotechnique's pipe network is docked with the vertical post holes on correspondence position, one by one using bail (11) to interlayer
Geotechnological pipe network is positioned, and fills the thick embankment soil of one layer of 40mm～50mm on the net in the interlayer geotextile tube laid, and protects
Hold the injected hole 7 in geotechnological pipe network and steam vent 8 is to protrude out upwards and is unobstructed；
Step 4: by the order of layering of banketing after first step surface, high polymer slurry is passed sequentially through injected hole to interlayer geotechnique's pipe network
In carry out slip casting, and passed through slurry hole to slip casting in vertical post holes, formed respectively interlayer slip casting geotechnique's pipe network (2b) and each vertically
Interlayer reinforced column (3d), completes the construction of monolayer reinforced structure；
Step 5: from bottom to top, be layered by the height of every layer of step surface, each monolayer reinforced structure of constructing one by one, until banketing
Layer (1) all fills compacting；
Step 6: laying side slope geotechnique's pipe network in side slope, make crossing on slurry hole (6) and correspondence position in side slope geotechnique's pipe network
Oblique post holes is docked one by one, is positioned using bail (11) side slope geotechnique's pipe network；By high polymer slurry pass through injected hole to
Carry out slip casting in side slope geotechnique's pipe network, and passed through slurry hole to slip casting in oblique post holes, formed by side slope slip casting geotechnique's pipe network
(2c) slope protection structure constituting with slope reinforcement post (3c), completes applying of high polymer grouting reinforcement anti-settling widening subgrade
Work.
2. the construction method of the high embankment widening subgrade of high polymer grouting reinforcement anti-settling according to claim 1, its feature
It is:
Length of side l of rectangular mesh in described interlayer geotechnique's pipe network1For 0.4m～0.6m, the diameter d of pvc pipe1For 18～22mm；
Length of side l of rectangular mesh in described side slope geotechnique's pipe network2For,The diameter d of pvc pipe2For:Wherein, α is the angle of side slope；
Described vertical interlayer reinforced column (3d) has two rows in step, has 3～5 rows, adjacent vertical interlayer adds in layering of banketing
Gu the spacing of post (3d) is 0.4m～0.6m, a diameter of 16～20mm of each vertical interlayer reinforced column (3d), nearest apart from side slope
The length of a row vertical interlayer reinforced column be (2.4～2.6) × h, other length respectively arranging vertical interlayer reinforced column are (1.4
～1.6) × h, h are the height of corresponding one layer of step surface；
The distribution of described slope reinforcement post (3c) is: multiple rows of slope reinforcement post is arranged from bottom to top by the toe of embankment, minimum one
The distance apart from side slope base for the capital of row's slope reinforcement post is l2, the spacing between the capital of adjacent two row's slope reinforcement posts is also
For l2, a diameter of 16～20mm of slope reinforcement post, length d of jth row slope reinforcement postjFor:
When j=1～3, dj=1.4jl2tanα；
When j is more than 3, dj=d3, j is natural number；
In described step interface (4b), the height of step is 0.8m～1.0m, and the width of step is 2m～2.5m.
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