CN107119520A - The soft base combined type of coastal tidal, which is changed, fills out structure and Treatment Methods - Google Patents
The soft base combined type of coastal tidal, which is changed, fills out structure and Treatment Methods Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 20
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Classifications
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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
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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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Abstract
Changed the invention discloses the soft base combined type of coastal tidal and fill out structure and Treatment Methods, be related to Soft Ground field.A kind of soft base combined type of coastal tidal of present invention offer, which is changed, fills out structure, including sea sand bed course, blotter, geogrids layer, embankment filled soil layer and road surface structare layer, and set gradually from bottom to top, sea sand bed course and blotter are respectively positioned on below ground, and GSZ, embankment filled soil layer and road surface structare layer are located at more than ground.Changed present invention also offers a kind of soft base and fill out Treatment Methods, it changes applied to above-mentioned combined type and fills out structure.The soft base combined type of coastal tidal that the present invention is provided, which is changed, fills out structure and Treatment Methods and can make full use of abundant sea sand resources, reduce soft base and change and fill into this, the construction period is shortened, and can effectively ensure that soft base changes matrix amount, with good economic benefit and far-reaching social benefit.
Description
Technical field
The present invention relates to Soft Ground field, changed in particular to the soft base combined type of coastal tidal fill out structure and
Treatment Methods.
Background technology
With the fast development of China's economy, the demand to highway construction expands rapidly, while the also matter to highway construction
Amount problem proposes baptism.China is vast in territory, and many highways are built on coastal tidal phase soft soil foundation, along strand
Area builds highway, and is frequently encountered saturation silt clay and loose fine sand layer, if punishment is improper, easily cause the construction time with
The diseases such as the jump car of the roadbed longitudinal cracking of operation phase, roadbed sliding and bridges and culverts joint.Guangxi is coastal as the connection North Sea
The important channel in area, Binhai Highway total length 314.2km, route is laid along northern indented coast line, and soft soil foundation section exceedes
200km, accounts for the 70% of route overall length.
Binhai Highway is normally at strand terrace region of no relief, and landform is flat, physical features is relatively low, there is following technical characterstic：Ground
Lower water level long-term existence and water level is poor compared with high, Technical Characteristics of Mild Clay, periphery stone material is few, sea sand resources are abundant etc..By existing correlation
Code requirement, soft base replacing method is generally the materials such as slabstone, rubble, cobble, gravel, but because coastal region is generally deficient of this
Class material, if all outer exchange filler, there are problems that changing filler transfer distance it is remote and, all adopted if soft base changes to fill out
With above-mentioned outsourcing material, only treatment of soft foundation will produce enormous expenditure.
The characteristics of weak soil regional for coastal tidal, answered when carrying out Soft Soil punishment emphasis consider weak soil composition, structure,
Content in terms of underground water, replacing method type and source and embankment stability.Existing weak sub-grade treatment method can not be well
The level of ground water long-term existence and water level that solve to build highway presence on coastal tidal mutually regional weak soil are higher, Soft Soil Engineering
The problems such as matter is poor, periphery stone material is few.Coastal region sea sand resources very abundant, sea sand price is relatively cheap, if can make full use of
The soft base of sea sand progress, which is changed, to be filled out, and will substantially reduce the weak sub-grade treatment expense in coastal tidal area.
The content of the invention
Changed it is an object of the invention to provide a kind of soft base combined type of coastal tidal and fill out structure, which improved in coastal tidal
The level of ground water long-term existence of highway presence is built on phase weak soil and water level is higher, Soft Soil Engineering property is poor, periphery stone material is few
Problem.Meanwhile, the abundant sea sand resources enriched using seashore are reduced soft base and changed and fill into this, are accelerated soft base and are changed and fill out speed,
The construction period is shortened, and can effectively ensure that soft base changes matrix amount, with good economic benefit and far-reaching social benefit.
Change another object of the present invention is to providing a kind of soft base combined type of coastal tidal and fill out Treatment Methods, which improve
The level of ground water long-term existence of highway presence is built on coastal tidal phase weak soil and water level is higher, Soft Soil Engineering property is poor, periphery
The problem of stone material is few.Meanwhile, the abundant sea sand resources enriched using seashore are reduced soft base and changed and fill into this, are accelerated soft base and are changed
Speed is filled out, the construction period is shortened, and can effectively ensure that soft base changes matrix amount, with good economic benefit and far-reaching society
Can benefit.
The present invention provides a kind of technical scheme：
A kind of soft base combined type of coastal tidal, which is changed, fills out structure, it is adaptable to which coastal tidal area soft soil foundation, which is changed, fills out processing.Shore
Seabeach, which applies soft base combined type, to be changed and fills out structure and include sea sand bed course, blotter, geogrids layer, embankment filled soil layer and pavement structure
Layer, sea sand bed course, blotter, geogrids layer, embankment filled soil layer and the cross sectional shape of road surface structare layer are trapezoidal, and from
Set gradually on down, sea sand bed course and blotter are respectively positioned on below ground, geogrids layer, embankment filled soil layer and road surface knot
Structure layer is located at more than ground.
Further, the long side in above-mentioned sea sand bed course section is contacted with the short side in blotter section, blotter section
It is long while with embankment filled soil layer it is long while contact, and blotter section length of long sides be more than embankment filled soil layer it is long while while
It is long.
Further, above-mentioned blotter is located between sea sand bed course and embankment filled soil, and sea sand bed course is more than rubble pad
The thickness of layer.
Further, above-mentioned GSZ is arranged between embankment filled soil layer and blotter, and the quantity of GSZ
To be multiple, and multiple GSZs are layered on top of each other.
Further, above-mentioned GSZ laying direction is perpendicular to route direction of advance, cross-sectional direction laying Ying Lu
Base outer rim anti-package 150cm~200cm, the connected mode of adjacent two width GSZ is overlap joint, and it overlaps length and is more than or waits
In 15cm.
A kind of soft base combined type of coastal tidal, which is changed, fills out Treatment Methods, is changed applied to the soft base combined type of coastal tidal and fills out structure.
The soft base combined type of coastal tidal, which is changed, fills out structure and highway subgrade and includes sea sand bed course, blotter, embankment filled soil layer and road surface knot
Structure layer.Sea sand bed course, blotter, embankment filled soil layer and the cross sectional shape of road surface structare layer are trapezoidal, and from bottom to top according to
Secondary to set, sea sand bed course and blotter are respectively positioned on below ground, and embankment filled soil layer and road surface structare layer are located at more than ground.Shore
Seabeach, which applies soft base combined type, to be changed and fills out Treatment Methods and include preparation of construction step, surveying and locating step, weak soil thickness testing procedure, clear
Except Soft Soil Layer step, base bearing capacity testing procedure, backfill sea sand step, backfill rubble step, Roadbed Soil step and road surface
Structure paves step.Removing Soft Soil Layer step includes：Slope excavation removing is carried out to the Soft Soil Layer in selected strand section.Backfill
Sea sand step includes：Hole filling sea sand is filled out to changing, and adopts steamroller, to obtain sea sand bed course.Backfill rubble step bag
Include：Blotter is layed on sea sand bed course, and adopts steamroller, to obtain blotter.GSZ is laid
Step：Lay and tense at the top of blotter, to obtain geogrids layer.Roadbed Soil step includes：On blotter
Banketed, to obtain embankment filled soil layer.The pavement structure step that paves includes：Repairing for pavement structure is carried out on embankment filled soil layer
Build, to obtain road surface structare layer.
Further, the step of above-mentioned Soft Soil Layer to selected strand section is purged is removed including the use of excavator
Soft Soil Layer, and the slope in excavation, to ensure the stability of slope of soft soil foundation pit.Changed using small-sized machine and manual cleaning and fill out hole bottom
The Soft Soil Layer in portion.
Further, the step of above-mentioned filling sea sand to soft soil foundation pit pushes the step of paving sea sand for multiple layerings, point
Layer, which pushes the step of paving sea sand, to be included：Medium coarse sand is proceeded by with bull-dozer by one end of soft soil foundation pit to backfill；Backfill rubble
Step also includes：Pushed in each layering after the step of paving sea sand terminate, to after layering pushes the step of paving sea sand
The sea sand paving layer of formation carries out water filling, and makes the water surface higher than the aspect of sea sand paving layer, after sea sand paving layer reaches saturation,
Sea sand paving layer is compacted.
Further, it is above-mentioned into the soft soil foundation pit with sea sand bed course fill rubble the step of for it is multiple layering pave it is broken
The step of stone；Backfill rubble step also includes pressing the rubble paving layer formed after the step of layering paves rubble
Real, the step of being compacted to the rubble paving layer formed after the step of layering paves rubble is carried out multiple using road roller
Roll, and the wheelmark rolled every time overlapping 1/3.
Further, the soft base combined type of above-mentioned coastal tidal change fill out Treatment Methods also include GSZ lay step, with
GSZ bed course is obtained, GSZ lays step between backfill rubble step and Roadbed Soil step；GSZ
Laying step includes vertically being layed in GSZ into the top surface of blotter, two neighboring GSZ along laying direct of travel
Mutually overlap.
Compared with prior art, the soft base combined type of coastal tidal that the present invention is provided changes the beneficial effect for filling out structure and Treatment Methods
It is really：
Material required for sea sand bed course arises directly from locally abundant sea sand resources, can save a large amount of manpowers, thing
Power and financial resources.By sea sand and rubble organic assembling, soft soil foundation change to fill out punishment, solve and run into during construction rolling
Return water problems, improve the soft base combined type of coastal tidal and change the intensity for filling out structure, the weak soil combined type after processing, which is changed, fills out roadbed
Settling amount is small.Meanwhile, the water stabilities of the treatment structures is good, price is relatively low, substantially reduces engineering cost.The shore that the present invention is provided
Seabeach, which applies soft base combined type, to be changed and fills out structure and Treatment Methods solve the underground that highway presence is built on coastal tidal phase weak soil
Water level long-term existence and the problem of water level is higher, Soft Soil Engineering property is poor, periphery stone material is few, can be abundant be enriched using seashore
Sea sand resources, reduce soft base and change and fill into this, accelerate soft base and change to fill out speed, shorten the construction period；Increase on sea sand bed course
Blotter, solves and rolls the problem of sea sand returns water under the conditions of phreatic high, and due to the pressure diffusion effect phase of rubble
It is good for sea sand, improve soft base and change the structural strength for filling out part, can effectively ensure that soft base changes matrix amount, with good warp
Benefit of helping and far-reaching social benefit.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described.It should be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore it is not construed as pair
The restriction of scope.For those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 changes the structural representation for filling out structure for the soft base combined type of coastal tidal that the first embodiment of the present invention is provided；
Fig. 2 is the mplifying structure schematic diagram at II in Fig. 1；
The structural representation for the GSZ pad that Fig. 3 provides for the first embodiment of the present invention；
Fig. 4 changes the flow signal for filling out Treatment Methods for the soft base combined type of coastal tidal that the second embodiment of the present invention is provided
Figure.
Icon：The soft base combined type of 100- coastal tidals, which is changed, fills out structure；110- sea sand bed courses；120- blotters；130- soil
Work grid；The grids of 131- first；The grids of 132- second；133- bundled pieces；140- embankment filled soils layer；150- road surface structare layers；S1-
Preparation of construction step；S2- surveying and locating steps；S3- bearing capacity under soft foundation testing procedures；S4- removes Soft Soil Layer step；S5- substrates
Test of bearing capacity step；S6- backfills sea sand step；S7- backfills rubble step；S8- GSZs lay step；S9- roadbeds are filled out
Native step；S10- pavement structures pave step.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.
In the description of the invention, it is to be understood that term " on ", " interior ", the orientation of the instruction such as " outer " or position close
It is that for based on orientation shown in the drawings or position relationship, or the orientation usually put when using of the invention product or position are closed
System, or the orientation that usually understands of those skilled in the art or position relationship, are for only for ease of the description present invention and simplify
Description, rather than indicate or imply that the equipment or element of meaning must have specific orientation, with specific azimuth configuration and behaviour
Make, therefore be not considered as limiting the invention.
In addition, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that indicating or implying relatively important
Property.
Below in conjunction with the accompanying drawings, the embodiment to the present invention is described in detail.
First embodiment
Fig. 1 and Fig. 2 are referred to, a kind of soft base combined type of coastal tidal is present embodiments provided and changes and fill out structure 100, it improves
Built on coastal tidal phase weak soil the level of ground water long-term existence of highway presence and water level is higher, Soft Soil Engineering property is poor,
The few problem of periphery stone material, with good economic benefit and far-reaching social benefit.
The soft base combined type of coastal tidal that the present embodiment is provided, which is changed, fills out structure 100 suitable for the regional soft soil foundation of coastal tidal
Change and fill out processing, soft soil foundation includes ground (figure is not marked).The characteristics of for coastal tidal phase weak soil, should weigh during weak soil punishment
Point considers the content in terms of weak soil composition, structure, underground water, replacing method and embankment stability.
The soft base combined type of coastal tidal that the present embodiment is provided, which is changed, fills out structure 100 including sea sand bed course 110, blotter
120th, GSZ 130, embankment filled soil layer 140 and road surface structare layer 150, sea sand bed course 110, blotter 120, embankment filled soil
The cross sectional shape of layer 140 and road surface structare layer 150 is trapezoidal, and is set gradually from bottom to top, sea sand bed course 110 and rubble pad
Layer 120 is respectively positioned on below ground, and embankment filled soil layer 140 and road surface structare layer 150 are located at more than ground, and GSZ 130 is located at
Between blotter 120 and embankment filled soil layer 140.
It is appreciated that sea sand bed course 110 be use sea sand push and pave formed by.It again it will be understood that
Be, blotter 120 be also using to rubble carry out push pave by the way of formed by.
In the present embodiment, section of sea sand bed course 110, blotter 120, embankment filled soil layer 140 and road surface structare layer 150
Face shape is trapezoidal.It is appreciated that sea sand bed course 110, blotter 120, embankment filled soil layer 140 and road surface structare layer 150
Trapezoid cross section can be isosceles trapezoid or other any trapezoidal.
In the present embodiment, the long side in the section of sea sand bed course 110 is contacted with the short side in the section of blotter 120, rubble pad
The long of 120 section of layer contacts in long with embankment filled soil layer 140, and the section of blotter 120 length of long sides more than embankment
The length of long sides of fill stratum 140.
In the present embodiment, sea sand bed course 110 and blotter 120 are respectively positioned on below ground, embankment filled soil Ceng140He roads
Face structure sheaf 150 is respectively positioned on the ground.The length of long sides in the section of blotter 120 is more than the length of long sides of embankment filled soil layer 140, can
So that positioned at ground embankment filled soil layer 140 and road surface structare layer 150 under the support of sea sand bed course 110 and blotter 120
Structural soundness is more preferable, so that improving the soft base combined type of coastal tidal changes the stability for filling out structure 100.
The scope of the length of side on the long side in the section of sea sand bed course 110 can according to geological conditions select 60m~200m (including end
Point value) in an excavation length.In the present embodiment, the length of side on the long side in the section of sea sand bed course 110 is 100m.Certainly, and
This is not limited only to, in other embodiments of the invention, the length of side can also be other values, such as 90m etc..
In the present embodiment, the thickness of sea sand bed course 110 is more than the thickness of blotter 120.The pressure of blotter 120
Diffusivity is more stronger than the pressure diffusion ability of sea sand bed course 110, thus blotter 120 can make the soft base of coastal tidal answer
Box-like change fills out more stablizing for structure 100.
In the present embodiment, the thickness of sea sand bed course 110 is 1.5m, and the thickness of blotter 120 is 0.5m.Certainly, and
This is not limited only to, in other embodiments of the invention, sea sand bed course 110 can also be respectively others with blotter 120
Thickness, such as the thickness of sea sand bed course 110 are 2.0m, and the thickness of blotter 120 is 0.8m etc., sea sand bed course 110 and rubble
The specific thickness of bed course 120 can be determined according to embankment raising, level of ground water height, stress spread calculating etc. are comprehensive.
In order that the soft base combined type of coastal tidal is changed and fills out structure 100 and possess more preferable anti-pressure ability, the pressure of sea sand bed course 110
Solidity is 85% to 95%, and the compactness of blotter 120 is more than 90%.In the present embodiment, the compactness of sea sand bed course 110
For 90%, the compactness of blotter 120 is 90%.Certainly, it is not limited to that, in other embodiments of the invention, sea
The compactness of sand bedding course 110 and blotter 120 can also be other values, such as the compactness of sea sand bed course 110 is 89%, broken
The compactness of stone bed course 120 is 91% etc..
Referring to Fig. 3, the quantity for the GSZ 130 that the present embodiment is provided is one layer, GSZ 130 is arranged at embankment
Between fill stratum 140 and blotter 120.
It is appreciated that GSZ 130 can also be set to multilayer according to the stability requirement of specific roadbed.It is preferred that
Ground, GSZ 130 is 1~3 layer.
The effect of GSZ 130 is to change to strengthen the soft base combined type of coastal tidal to fill out the steadiness of structure 100, by soil
Work grid 130, which is arranged between embankment filled soil layer 140 and blotter 120, can change the soft base combined type of coastal tidal to fill out structure
100 more steadiness.
It is appreciated that GSZ 130 lays direction perpendicular to route direction of advance, cross-sectional direction laying should be in roadbed
Outer rim anti-package 150cm~200cm, the connected mode of adjacent two width GSZ 130 is overlap joint, and it overlaps length and is more than or waits
In 15cm.
In the present embodiment, GSZ 130 includes the first grid 131, the second grid 132 and bundled piece 133, the first lattice
Grid 131 are set mutual vertically with the second grid 132, and are connected between two neighboring GSZ 130 using overlapping mode, bundle
The effect for tying up part 133 is in order to the first grid 131 and the second grid 132 are mutually overlapped.In the present embodiment, bundle
Part 133 is iron wire.Certainly, it is not limited to that, in other embodiments of the invention, bundled piece 133 can also be other knots
Structure, such as bundled piece 133 are rope for being made up of nano level high polymer material etc..
The soft base combined type of coastal tidal that the present embodiment is provided, which is changed, fills out the beneficial effect of structure 100 and is：The institute of sea sand bed course 110
The material needed arises directly from locally abundant sea sand resources, and sea sand and rubble organic assembling are answered soft soil foundation
Box-like change fills out punishment, solves rolling of being run into work progress and returns water problems, improves the soft base combined type of coastal tidal and changes and fills out
The intensity of structure 100, the compound soft soil roadbed settlement amount after processing is small.The soft base combined type of coastal tidal that the present embodiment is provided is changed
Fill out structure 100 solve built on coastal tidal phase weak soil highway presence level of ground water long-term existence and water level is higher, soft
Native engineering properties is poor, periphery stone material is few, roll the problems such as returning water, the sea sand resources can be abundant enriched using seashore, reduces
Soft base, which is changed, fills into this, accelerates soft base and changes and fill out speed, shortens the construction period.The water stability of the treatment structures is good, price compared with
It is low, engineering cost is substantially reduced, with good economic benefit and far-reaching social benefit.
Second embodiment
Treatment Methods are filled out referring to Fig. 4, present embodiments providing a kind of soft base combined type of coastal tidal and changing, are which solved
The level of ground water long-term existence of highway presence is built on coastal tidal phase weak soil and water level is higher, Soft Soil Engineering property is poor, periphery
The few problem of stone material, the Treatment Methods on-site construction operations are convenient, it is easy to which soft base, which is changed, fills out quality control, and construction cost is smaller, construction
Short time limit, with good economic benefit and far-reaching social benefit.
The present embodiment provide the soft base combined type of coastal tidal change fill out Treatment Methods including preparation of construction step S1, measurement put
Sample step S2, bearing capacity under soft foundation testing procedure S3, removing Soft Soil Layer step S4, base bearing capacity testing procedure S5, backfill sea sand
Step S6, backfill rubble step S7, GSZ laying step S8, Roadbed Soil step S9 and pavement structure pave step S10,
Illustrate separately below.
Preparation of construction step S1
In the present embodiment, preparation of construction step S1 includes：Prepare more than the medium coarse sand that laying sea sand bed course 110 is used
Particle diameter, clay content≤5%, infiltration coefficient >=6 × 10-2~6 × 10-3cm/s；It is hard to prepare the laying medium stone of blotter 120
Matter-compared with hard rock material, and clay content≤5%；Tensile strength, elongation, the node limit for preparing laying GSZ 130 are shelled
Design requirement should be met from power；The filler liquid limit for preparing laying embankment filled soil layer 140 is less than 50%, and plasticity index is less than 26%,
Roadbed carries ratio >=3；Design related request should be met by preparing the material of laying road surface structare layer 150.
In the present embodiment, the particulate component ratio of sea sand bed course 110 is that 0.5~2.0mm of particle diameter accounts for 46.3%, 0.25~
0.5mm accounts for 38.9%, and 0.75~0.25mm accounts for 7.2%, and medium coarse sand content accounts for 85.2%, and clay content is 0.7%, and infiltration coefficient is
5×10-2cm/s.The material of blotter 120 is middle weathered granite, and rock matter is hard, and compression strength is more than 30Mpa, and clay content is
0.2%, crushed stone material can not be made using the crushing such as swelling rock, easy softening rock, strongly soluble rock or salinization rock.
GSZ 130 is the two-way firm modeling weldbonding GSZs 130 of GDZ150, and longitudinal direction is 150kN/m per linear meter(lin.m.) ultimate tensile strength, is indulged
Elongation is 2.5%, breadth 6m, node limit peeling force 60N under to nominal tensile strength.The filler of embankment filled soil layer 140
Mechanics index of physics is that the scope of liquid limit is 19.5%~40.3%, and the scope of plasticity index is 8.6%~22.4%, roadbed
The scope for carrying ratio is 3.8~19.6.
Surveying and locating step S2
In the present embodiment, surveying and locating step S2 includes：The repetition measurement of bench mark is completed by fourth-order leveling requirement, is pressed
The requirement of first-order traverse measurement completes the repetition measurement of connecting traverse and sets up bench mark, traverse point encrypted work.Check vertical and horizontal section
Figure, releases highway land scope line, and in being released by mono- stake of 20m, skirt piles, carry out natural ground level, vertical section elevation, cross-section
Face repetition measurement.
Bearing capacity under soft foundation testing procedure S3
In the present embodiment, bearing capacity under soft foundation testing procedure S3 includes：Top drainage is carried out, and uses standard light power
Whether feeler inspection carries out bearing capacity under soft foundation test, accurate rationally with the soft ground excavation depth that this examines design offer.Roadbed is longitudinally surveyed
Try spacing to control by 20m, by the point control of left, center, right 3 on subgrade cross section, MTD is as required for the different depths of fill
The control of design foundation bearing capacity, design foundation bearing capacity scope is 120kPa~150kPa.
Remove Soft Soil Layer step S4
The section filled out is changed in needs, suitable construction paragraph delimited, determines that every section is changed the length for filling out region.To selected shore
The Soft Soil Layer of sea route section is purged, to obtain soft soil foundation pit.
Preferably, to soft soil foundation pit slope, the cross sectional shape for making soft soil foundation pit is trapezoidal.
In the present embodiment, usage mining machine excavates the Soft Soil Layer for changing and filling out in depth.Generally go through that excavator obtains changes
Fill out hole, hole bottom surface can remaining certain thickness Soft Soil Layer, the Soft Soil Layer is by small-sized machine or manual cleaning.
According to situations such as weather, construction ability, Soft Clay condition, delimit suitable construction paragraph, with every segment length 60~
200m is advisable.
In the present embodiment, usage mining machine excavates the Soft Soil Layer for changing and filling out in depth, notices that crater wall slope is stable during excavation,
Change and fill out the bottom surface in hole and avoid serious disturbance subjacent bed.Hole bottom is filled out when changing not usually, stepped form should be made, according to elder generation during backfill
Shallow principle, which is changed, after depth fills out.Soft base foundation ditch should not expose for a long time, and sea sand bed course 110 and blotter 120 should get the raw materials ready in advance.
Base bearing capacity testing procedure S5
In the present embodiment, base bearing capacity testing procedure S5 includes：It is light using standard again after soft soil foundation excavation
Whether type dynamic sounding carries out bearing capacity under soft foundation test, thorough to examine weak soil excavation, otherwise should carry out secondary excavation removing soft
Soil.Base bearing capacity test spacing is still controlled by roadbed longitudinal direction 20m, by the point control of left, center, right 3, test on subgrade cross section
Depth is controlled by design foundation bearing capacity scope for 120kPa~150kPa.
Backfill sea sand step S6
Sea sand is filled to soft soil foundation pit, to obtain sea sand bed course 110.
In the present embodiment, the step of filling sea sand to soft soil foundation pit pushes the step of paving sea sand for multiple layerings, point
Layer, which pushes the step of paving sea sand, to be included：Medium coarse sand is proceeded by with bull-dozer by one end of soft soil foundation pit to backfill, and by small-sized
Machinery and artificial progress assistance pave.
Pushed in each layering after the step of paving sea sand terminate, to being formed after layering pushes the step of paving sea sand
Sea sand paving layer carry out water filling, and make the water surface be higher than sea sand paving layer aspect, after sea sand paving layer reaches saturation, to sea
Sand paving layer is compacted.
When starting backfill medium coarse sand, foundation ditch reclaimed water should be drained.Medium coarse sand is proceeded by by one end to backfill, press with bull-dozer
30~40cm thickness layerings, which are pushed, to be paved, and indivedual dead angles are paved by artificial assistance.Pave and water filling is carried out after one layer, water surface requirement is just
Layer of sand top surface is covered, under water-saturated state, the bull-dozer using deadweight more than 15t walks back and forth, passed through using bull-dozer deadweight
Crawler belt layer of sand is rolled it is compacted, compacting route along route longitudinal direction, from trackside into road or by the suitable of relatively low one lateral higher side
Sequence is rolled, twice necessary overlapping 1/3 seat in the plane between track route, to ensure not leak pressure.According to number of rolling and compactness in construction
It is detected as key Quality Control.If foundation ditch underground water especially enriches, it can also be paved using thick-layer sea sand, sea sand thickness is by slightly above
Groundwater level is controlled, and using conducting oneself with dignity, less crawler dozer paves from one end of foundation ditch toward the other end, is pushed away by crawler type
Native machine, which moves back and forth, tentatively to be rolled, and is then reused vibrating roller press and is compacted, the vibration intensity rolled is ascending.
Backfill rubble step S7
Rubble is filled into the soft soil foundation pit with sea sand bed course 110, to obtain blotter 120.
The step of rubble is filled into the soft soil foundation pit with sea sand bed course 110 is layered the step of paving rubble to be multiple.
In the present embodiment, backfill rubble step S7 also includes entering the rubble paving layer formed after the step of layering paves rubble
Row compacting, the step of being compacted to the rubble paving layer formed after the step of layering paves rubble is carried out using road roller
Repeatedly roll, and the wheelmark rolled every time overlapping 1/3.
Blotter 120 can be backfilled after the completion of backfill sea sand bed course 110, can not there be the top surface of sea sand bed course 110 before backfill
Bright water, rubble uses graded broken stone, rubble pave it is consistent with the medium coarse sand method that paves, unlike, graded broken stone is using pressure road
Machine is compacted, and compaction requirement is more than 90%.The thickness 1m of blotter 120, back-filling in layers, lift height and number of rolling pass through experiment
Section is determined, is layered paving thickness≤25cm, is rolled more than 4 times using 30t vibrated rollers, roll and follow " it is high after first low, it is first quiet
After move, it is first slow after it is fast " principle, while the wheelmark of every time answers overlapping 1/3, pressure must not be leaked, it is all road roller have press less than ground
Side, is tamped with small rammer tool, untill compactness as defined in reaching.
GSZ laying step S8
The soft base combined type of coastal tidal, which is changed, fills out Treatment Methods also including GSZ laying step S8, to obtain GSZ
130 bed courses, GSZ 130 lays step between backfill rubble step S7 and Roadbed Soil step S9.
In the present embodiment, GSZ laying step S8 includes along laying direct of travel vertically spreading GSZ 130
Located at the top surface of blotter 120, two neighboring GSZ 130 is mutually overlapped.
Using artificial laying, surface should be smooth, and laying direction is paved with whole blotter perpendicular to route direction of advance
120 top surfaces, cross-sectional direction is routed at roadbed outer rim 30cm, the GSZ 130 of roadbed outer rim answer anti-package 150cm~
200cm, the connecting mode of GSZ 130 is using overlap joint, iron wire colligation connection, and its overlapping length is no less than 15cm.For
It must be tensioned before ensureing the muscle body effect of geosynthetics, earthing, banketing must be in strict accordance with a lateral opposite side one direction
Tiling is promoted, and forbids vehicle directly to be travelled on GSZ 130.
Roadbed Soil step S9
Banketed on blotter 120, to obtain embankment filled soil layer 140.
Pavement structure paves step S10
The build of pavement structure is carried out on embankment filled soil layer 140, to obtain road surface structare layer 150.
The soft base combined type of coastal tidal that the present embodiment is provided changes the beneficial effect for filling out Treatment Methods：The institute of sea sand bed course 110
The sea sand needed arises directly from locally, can save manpower and financial resources.Sea sand is organically combined to enter soft soil foundation with rubble
Row, which is changed, fills out punishment, so that improving the soft base combined type of coastal tidal changes the intensity for filling out structure 100, it is compound soft soil roadbed after processing
Settling amount is small.The Treatment Methods construction technology is simple, few by restraining factors without special construction plant equipment, is easy to construction, and
And construction speed is very fast.Meanwhile, the water stabilities of the treatment structures is good, price is relatively low, substantially reduces engineering cost.The present embodiment
The soft base combined type of coastal tidal of offer, which is changed, fills out structure 100 and improves what on coastal tidal phase weak soil building highway was present
Level of ground water long-term existence and water level is higher, Soft Soil Engineering property is poor, the few problem of periphery stone material, with good economic benefit with
Far-reaching social benefit.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of soft base combined type of coastal tidal, which is changed, fills out structure, it is adaptable to which coastal tidal area soft soil foundation, which is changed, fills out processing, and it is special
Levy and be, including sea sand bed course, blotter, geogrids layer, embankment filled soil layer and road surface structare layer, the sea sand bed course,
The blotter, the geogrids layer, the embankment filled soil layer and the road surface structare layer cross sectional shape be it is trapezoidal,
And set gradually from bottom to top, the sea sand bed course and the blotter are respectively positioned on below ground, the geogrids layer, institute
State embankment filled soil layer and the road surface structare layer is located at more than ground.
2. the soft base combined type of coastal tidal according to claim 1, which is changed, fills out structure, it is characterised in that the sea sand bed course is cut
The long side in face is contacted with the short side in blotter section, the blotter section it is long while with the embankment filled soil layer it is long while
Contact, and the length of long sides of the length of long sides more than embankment filled soil layer in the blotter section.
3. the soft base combined type of coastal tidal according to claim 1, which is changed, fills out structure, it is characterised in that the blotter position
Between the sea sand bed course and the embankment filled soil, and the sea sand bed course is more than the thickness of the blotter.
4. the soft base combined type of coastal tidal according to claim 1, which is changed, fills out structure, it is characterised in that the GSZ is set
It is placed between embankment filled soil layer and the blotter, and the quantity of the GSZ is multiple, and multiple soil
Work grid is layered on top of each other.
5. the soft base combined type of coastal tidal according to claim 4, which is changed, fills out structure, it is characterised in that the geotechnological lattice of adjacent two width
The connected mode of grid is overlap joint, and it overlaps length and is more than or equal to 15cm.
6. a kind of soft base combined type of coastal tidal, which is changed, fills out Treatment Methods, for the shore as described in any one in claim 1-5
The seabeach soft base combined type of painting, which is changed, fills out structure, it is characterised in that the soft base combined type of coastal tidal, which is changed, fills out Treatment Methods including applying
Work preparation process, surveying and locating step, bearing capacity under soft foundation testing procedure, remove Soft Soil Layer step, base bearing capacity testing procedure,
Backfill sea sand step, backfill rubble step, GSZ laying step, Roadbed Soil step and pavement structure pave step；
The preparation of construction step：Be ready for preparing the soft base combined type of the coastal tidal change fill out required for structure sea sand,
Rubble, GSZ, Roadbed Soil and ground surface material etc., it is desirable to which each material parameter meets related specifications requirement；
The bearing capacity under soft foundation testing procedure：Standard light power is carried out to load-carrying capacity of soft soil foundation and touches test, examines and intends excavating
Weak soil thickness it is whether consistent with design document, judge whether cutting depth accurate rationally；
The removing Soft Soil Layer step：Slope excavation removing is carried out to the Soft Soil Layer in selected strand section, to obtain Soft Soil
Hole；
The base bearing capacity testing procedure：After soft soil foundation excavation, the bearing capacity of weak soil is tested again, it is clear to examine weak soil
Except whether thorough, it otherwise should carry out secondary excavation and remove weak soil；
The backfill sea sand step：Sea sand is filled under water to the soft soil foundation pit, and adopts steamroller, to be expired
The sea sand bed course of sufficient compacting requirement；
The backfill rubble step：Blotter is layed on sea sand bed course, and adopts steamroller, to be met
The blotter of compacting requirement；
The GSZ lays step：GSZ is laid at the top of the blotter, to obtain the geogrids layer；
The Roadbed Soil step：Banketed in the geogrids layer, to obtain the embankment filled soil layer；
The pavement structure paves step：The build of pavement structure is carried out on embankment filled soil layer, to obtain the road surface
Structure sheaf.
7. the soft base combined type of coastal tidal according to claim 6, which is changed, fills out Treatment Methods, it is characterised in that described pair is selected
The Soft Soil Layer in strand section remove the Soft Soil Layer including the use of excavator the step of be purged, and in soft soil foundation pit
Slope in excavation, to ensure the stability of slope of the soft soil foundation pit；Changed using small-sized machine and manual cleaning and fill out the soft of hole bottom
Soil layer, it is to avoid serious disturbance bottom supporting course.
8. the soft base combined type of coastal tidal according to claim 6, which is changed, fills out Treatment Methods, it is characterised in that described to described
The step of soft soil foundation pit fills sea sand pushes the step of paving sea sand for multiple layerings, and the layering pushes the step of paving sea sand
Including：Medium coarse sand is proceeded by with bull-dozer by one end of the soft soil foundation pit to backfill；
The backfill rubble step also includes：Pushed in each layering after the step of paving sea sand terminate, to by described
Layering pushes the sea sand paving layer formed after the step of paving sea sand and carries out water filling, and makes the water surface higher than the sea sand paving layer
Aspect, after the sea sand paving layer reaches saturation, is compacted to the sea sand paving layer.
9. the soft base combined type of coastal tidal according to claim 6, which is changed, fills out Treatment Methods, it is characterised in that to described
In the soft soil foundation pit of sea sand bed course the step of paving rubble is layered the step of filling rubble to be multiple；
The backfill rubble step also includes carrying out the rubble paving layer formed after the step of layering paves rubble
Compacting, the step of described pair of rubble paving layer formed after the step of layering paves rubble is compacted is using pressure road
Machine is repeatedly rolled, and the wheelmark rolled every time overlapping 1/3.
10. the soft base combined type of coastal tidal according to claim 6, which is changed, fills out Treatment Methods, it is characterised in that the strand
The soft base combined type of beach, which is changed, fills out Treatment Methods also including GSZ laying step, described to obtain the GSZ bed course
GSZ lays step between the backfill rubble step and the Roadbed Soil step；
The GSZ laying step includes GSZ being vertically layed in the blotter along laying direct of travel
Top surface, the two neighboring GSZ is mutually overlapped.
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| CN107805987A (en) * | 2017-09-14 | 2018-03-16 | 中交第公路勘察设计研究院有限公司 | The hassock layer Foam lightweight soil road structure and construction method in deep soft foundation section |
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| CN109056441A (en) * | 2018-09-04 | 2018-12-21 | 杭州昂创科技有限公司 | The soft soil roadbed three-dimensional reinforced structure of convolution and construction method are knitted in stake- |
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| CN110158383A (en) * | 2019-05-05 | 2019-08-23 | 浙江大东吴集团建设有限公司 | Beach pavement construction method |
| CN110670432A (en) * | 2019-09-09 | 2020-01-10 | 中国二十冶集团有限公司 | Roadbed construction method for soft foundation area in rainy period |
| CN110670432B (en) * | 2019-09-09 | 2021-07-27 | 中国二十冶集团有限公司 | Roadbed construction method for soft foundation area in rainy period |
| CN113802426A (en) * | 2021-10-21 | 2021-12-17 | 华蓝设计（集团）有限公司 | Method for treating recent road filling foundation by adopting rubble compaction reinforced cushion layer method |
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