CN110396881A - The road construction method of section conllinear with rail traffic - Google Patents
The road construction method of section conllinear with rail traffic Download PDFInfo
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- CN110396881A CN110396881A CN201910650383.XA CN201910650383A CN110396881A CN 110396881 A CN110396881 A CN 110396881A CN 201910650383 A CN201910650383 A CN 201910650383A CN 110396881 A CN110396881 A CN 110396881A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Abstract
The present invention relates to road construction method technical fields, disclose a kind of road construction method of section conllinear with rail traffic, it include: the earthing situation in the conllinear section region based on road yet to be built Yu built rail traffic, the length direction by conllinear section region along road yet to be built is in turn divided into multiple subregions；Based on the earthing situation in subregion, calculates changing for each subregion and fill out parameter；The determining excavation parameter of parameter is filled out based on changing, excavation foundation pit is carried out to the roadbed in subregion, lightweight replacing method is poured in foundation pit, to form Huan Tian base, road yet to be built is laid in Huan Tian base.The road construction method guarantees that rail traffic structure surface and its a certain range of newly-increased additional load of surrounding are substantially zeroed after the completion of constructing, solve the highway layout and construction difficult problem of section conllinear with built rail traffic, a kind of scheme of safe and feasible is proposed as reference, and project cost also controls within the acceptable range.
Description
Technical field
The present invention relates to road construction method technical field more particularly to a kind of road constructions of section conllinear with rail traffic
Method.
Background technique
With the construction at full speed in city, mode of transportation increasingly three-dimensional.Chinese city rail traffic development is swift and violent, built
Construction plan has been built up or has been created or drawn up in more than 30 cities, and China is being formed using underground railway as backbone, a variety of
Type and the urban track traffic system deposited.With the continuous development of the comprehensive system of transport, road mileage is increasing, especially
Inside economically developed, densely populated group of cities, intensive road network construction also brings many problems, due to advanced road with
The specific Function and complementarity of rail traffic, two kinds of modes of transportation necessarily exist simultaneously in group of cities, and soil, channel etc.
Resource is relatively limited, some to move towards almost the same road and rail traffic position is laid unreasonable, leads to " sandwichly " occur,
Cause a large amount of land wastages.For a long time, the different types of construction project such as China's urban road and rail traffic belongs to not
It is managed with part, thus seldom can accomplish to consider as a whole in planning, design, process of construction.
Currently, in main transport channel, road traffic is a plurality of with rail traffic in order to realize that soil is maximally utilized
Line parallel laying is commonplace, and traffic route unified planning different in same transport channel is laid parallel or collinearly,
As the important measures for improving traffic corridor capacity, saving land occupation, optimization road network structure.But according to existing construction timing,
Rail traffic is built after surface road is formed mostly, while with the continuous construction in city, being also inevitably present newly-built
Or large-scale reorganization and expansion road project the case where being located on built rail traffic.Due to the importance of rail traffic structure safety,
The design and construction difficulty of conllinear road is higher, for how under the premise of not influencing Underground Rail Transit structure safety it is real
Now to the construction of conllinear road, there are no mature solutions.
Summary of the invention
The embodiment of the present invention provides a kind of road construction method of section conllinear with rail traffic, existing conllinear to solve
The higher problem of design and construction difficulty of road, the scheme to propose a kind of safe and feasible reduce road and are applying as reference
For the influence of rail traffic in work engineering.
The embodiment of the present invention provides a kind of road construction method of section conllinear with rail traffic, comprising:
Earthing situation based on road yet to be built Yu the conllinear section region of built rail traffic, by the conllinear section region along institute
The length direction for stating road yet to be built is in turn divided into multiple subregions；
Based on the earthing situation in the subregion, calculates each changing for the subregion and fill out parameter；
The determining excavation parameter of parameter is filled out based on described change, excavation foundation pit is carried out to the roadbed in the subregion, in the base
Lightweight replacing method is poured in hole, and to form Huan Tian base, the road yet to be built is laid in the Huan Tian base.
Wherein, the earthing situation based in the subregion calculates each changing for the subregion and fills out parameter, further wraps
Include: by the two sides sideline of the built rail traffic along the width direction of the built rail traffic respectively extend outward it is default away from
From the pre-determined distance is more than or equal to the depth of burying of the built rail traffic, fills out width to obtain changing.
Wherein, the earthing situation based in the subregion calculates each changing for the subregion and fills out parameter, further wraps
It includes: based on earthing bulk density and thickness average value in the subregion, the bulk density of the road yet to be built and thickness and the lightweight
The bulk density of replacing method, according to etc. loads change and fill out principle, calculate the thickness of the lightweight replacing method, fill out depth to obtain changing.
Wherein, it in the thickness for calculating the lightweight replacing method, is filled out after depth with obtaining changing, further includes:
Depth is filled out based on described change, calculates stability against floating property coefficient；
When the stability against floating property coefficient is more than or equal to 1.2, fills out depth with described change and change to calculate and fill out depth；Or
Person
It when the stability against floating property coefficient is less than 1.2, is changed described in adjustment and fills out depth, until the stability against floating property coefficient
Equal to or more than 1.2, depth is filled out with new changing and fills out depth to calculate to change.
Wherein, it is changed described in adjustment when the stability against floating property coefficient is less than 1.2 described and fills out depth, until described anti-
Floating stability coefficient is equal to or more than 1.2, fills out depth with new changing and fills out after depth to calculate to change, further includes:
When it is described calculating change fill out depth greater than predetermined limit change fill out depth when, the subregion is further subdivided into multiple
Child partition recalculates each changing for the child partition and fills out parameter；Or
When the calculating change fill out depth changed less than or equal to predetermined limit fill out depth when, changed with the calculating and fill out depth and be
It finally changes and fills out depth.
Wherein, described change based on described in fills out the determining excavation parameter of parameter, carries out excavation foundation pit to the roadbed in the subregion,
Lightweight replacing method is poured in the foundation pit, and to form Huan Tian base, the road yet to be built is laid in the Huan Tian base,
Further comprise:
Length direction by the subregion along the road yet to be built is divided into multiple construction sections by default spacing；
Slope is carried out to the construction section and is excavated to the first cutting depth, injection steel sheet pile supporting, vertical lower digging to second
Cutting depth；
Gravel sand bedding course, placement layer by layer lightweight replacing method to designed elevation are laid in the bottom of foundation pit；
It repeats the above steps, until completing the construction of all construction sections.
Wherein, it when the construction section is not or not first construction section, slope is carried out to the construction section is excavated to the described
One cutting depth, injection steel sheet pile supporting after vertical lower digging to the second cutting depth, are laid with gravel in the bottom in foundation pit
Stone sand bed course, before placement layer by layer lightweight replacing method to designed elevation, further includes: pull out positioned at a upper construction section with it is described
Deformation joint is arranged in steel sheet pile supporting between construction section.
Wherein, the bottom in foundation pit is laid with gravel sand bedding course, placement layer by layer lightweight replacing method to designed elevation, into
One step includes:
When the road yet to be built includes carriage way and Route for pedestrians, the first gravel sand is laid in the bottom of the foundation pit
Bed course, in the upper layer of the first gravel sand bedding course degressively placement layer by layer lightweight replacing method step by step from the bottom to top, to be formed
First Huan Tian base is laid with the carriage way in first Huan Tian base；
First Huan Tian base apply finish and then the foundation pit bottom be laid with the second gravel sand bedding course,
In the upper layer of the second gravel sand bedding course incrementally placement layer by layer lightweight replacing method step by step from the bottom to top, changed with forming second
Base is filled out, is laid with the Route for pedestrians in second Huan Tian base；
First Huan Tian base and second Huan Tian base are complementary.
Wherein, after first Huan Tian base applies and finishes, be laid in the foundation pit the second gravel sand bedding course it
Before, further includes: retaining wall is built along the boundary line of the Route for pedestrians in the foundation pit.
Wherein, described change based on described in fills out the determining excavation parameter of parameter, carries out excavation foundation pit to the roadbed in the subregion,
Lightweight replacing method is poured in the foundation pit, and to form Huan Tian base, the road yet to be built is laid in the Huan Tian base,
Further comprise: anti-seepage geomembrane is laid in the surrounding of the lightweight replacing method, in the Huan Tian base and the road yet to be built
Galvanized wire mesh is laid between road.
The road construction method of section conllinear with rail traffic provided in an embodiment of the present invention, first by conllinear section region along to
The length direction for building road is in turn divided into multiple subregions, selects similar in earthing situation that one section of region is as a subregion, so
Changing for each subregion is calculated afterwards and fills out parameter, then determines and excavates parameter, and excavation base is carried out to the roadbed in subregion according to parameter is excavated
Hole, lightweight replacing method is poured in foundation pit, a part of earthing at the top of built rail traffic structure is changed to fill out to change for lightweight and is filled out
Material is finally laid with road yet to be built to form Huan Tian base in Huan Tian base.The road construction method changes filling chock using lightweight
Material subregion, which changes, fills out conllinear section region, guarantees right above rail traffic structure and its a certain range of newly-increased around after the completion of constructing
Additional load is substantially zeroed, solves the highway layout and construction difficult problem of section conllinear with built rail traffic, proposes a kind of peace
Complete feasible scheme is as reference, and project cost also controls within the acceptable range.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the flow diagram of the road construction method of one of embodiment of the present invention section conllinear with rail traffic；
Fig. 2 is the process signal of the road construction method of the another kind section conllinear with rail traffic in the embodiment of the present invention
Figure；
Fig. 3 is the schematic diagram of one of embodiment of the present invention antifloating computation model；
Fig. 4 is the structural representation after the completion of the road construction of one of embodiment of the present invention section conllinear with rail traffic
Figure；
Fig. 5 is the concrete structure schematic diagram of the road in Fig. 4；
Fig. 6 is the construction process of the road of one of embodiment of the present invention section conllinear with rail traffic in the longitudinal direction
Schematic diagram, wherein a figure indicates the first step, and b figure indicates that second step, c figure indicate third step, and d figure indicates the 4th step, and e figure indicates the
Five steps, f figure indicate the 6th step, and g figure indicates the 7th step, and h figure indicates the 8th step；
Fig. 7 is construction stream of the road of one of embodiment of the present invention section conllinear with rail traffic on cross-sectional direction
Journey schematic diagram, wherein a figure indicates to be laid with the first gravel sand bedding course and the first Huan Tian base, and b figure indicates to build retaining wall, c chart
Show and is laid with the second gravel sand bedding course and the second Huan Tian base；
Fig. 8 is one of embodiment of the present invention collinearly structure of the road of section and the road of non-colinear section on interface
Schematic diagram；
Description of symbols:
1: lightweight replacing method；2: gravel sand bedding course；2-1: the first gravel sand bedding course；
2-2: the second gravel sand bedding course；3: Huan Tian base；3-1: the first Huan Tian base；
3-2: the second Huan Tian base；4: road yet to be built；41: carriage way；
42: Route for pedestrians；43: asphalt concrete pavement；44: cement stabilized macadam base；
45:C30 element concrete bed course；46: rendzinas roadbed treatment layer；5: municipal pipeline；
51: rain pipe；52: sewage pipe；53: backfill yellow ground；
6: element soil；61: the first construction sections；62: the second construction sections；
7: retaining wall；71: people's row guardrail；8: galvanized wire mesh；
9: anti-seepage geomembrane；10: foundation pit；11: steel sheet pile supporting；
12: protection panels.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the embodiment of the present invention, it should be noted that unless otherwise clearly defined and limited, term " the
One " " the second " is the number in order to clearly illustrate product component progress, does not represent any essential distinction."upper" "lower" " left side "
Direction shown in attached drawing is subject in the direction on " right side ".It for the ordinary skill in the art, can be as the case may be
Understand the concrete meaning of above-mentioned term in embodiments of the present invention.
It should be noted that unless otherwise clearly defined and limited, term " connection " shall be understood in a broad sense, for example, can
It, can also be indirectly connected through an intermediary to be to be connected directly.It for the ordinary skill in the art, can be specific
Situation understands concrete meaning of the above-mentioned term in inventive embodiments.
Fig. 1 is the flow diagram of the road construction method of one of embodiment of the present invention section conllinear with rail traffic,
Fig. 4 is the structural schematic diagram after the completion of the road construction of one of embodiment of the present invention section conllinear with rail traffic, such as Fig. 1 and
Shown in Fig. 4, a kind of road construction method of section conllinear with rail traffic provided in an embodiment of the present invention, comprising:
Step S10: the earthing feelings based on road 4 and the conllinear section region of built rail traffic (not shown) yet to be built
Condition, the length direction by conllinear section region along road 4 yet to be built are in turn divided into multiple subregions.
Step S20: it based on the earthing situation in subregion, calculates changing for each subregion and fills out parameter；
Step S30: the determining excavation parameter of parameter is filled out based on changing, the roadbed in subregion is carried out to excavate foundation pit 10, in foundation pit
Lightweight replacing method 1 is poured in 10, and to form Huan Tian base 3, road 4 yet to be built is laid in Huan Tian base 3.
Specifically, built rail traffic locates below ground level, and the depth of burying is 6-10 meters, sets at the top of built rail traffic
There are overburden layer, predominantly the element soil 6 of crude sedimentation formation.With the continuous construction in city, need ground is newly-built or reorganization and expansion
Road is based on city road planning, is inevitably present partially upper road traffic route and Underground Rail Transit route
Between parallel conllinear region, after the completion of guaranteeing road construction, to right above the structure of built rail traffic and its surrounding one
The newly-increased additional load determined in range is substantially zeroed, is displaced in conllinear section region in the present embodiment using lightweight replacing method 1
Overburden layer in part element soil 6, to realize counterweight balance.
The earthing situation in conllinear section region is reconnoitred first, the method that can use interval sampling, is obtained conllinear
The thickness value and severe value of all overburden layers of section roadside, select a Duan Lianxu similar in earthing layer thickness value and severe value
Region is a subregion, according to different thickness values and severe value by conllinear section region along road 4 yet to be built length direction successively
It is divided into multiple subregions.
Then, it based on the earthing situation in each subregion, calculates changing for each subregion and fills out parameter, changing and filling out parameter includes changing to fill out
Width changes and fills out depth, changes and fill out structure etc., the suitable lightweight replacing method 1 of simultaneous selection.Lightweight replacing method 1 can be bubble
Foam light soil, polystyrene foam (Expanded Polystyrene, abbreviation EPS) or foam concrete.Wherein, foam is light
Lightness effectively eliminate of matter soil covers extra load on subterranean tunnel or underground utilities, it is ensured that tunnel or pipeline use safe.
Common Foam lightweight soil bulk density is in 5~6kN/m3, porosity is up to 20%~70%, density and intensity can by requirement of engineering into
Row is adjusted, and difficulty of construction is smaller, can construct in narrow space, fills out suitable for changing for rail traffic top surface roadbed.And EPS is
A kind of light polymer has the characteristics that small water imbibition, good heat preservation performance, light weight and higher mechanical strength, still
EPS is slightly long compared to the construction period of Foam lightweight soil, and price is again slightly greater than Foam lightweight soil.Mainly with foam in the present embodiment
It is illustrated for light soil.
Then, parameter is excavated based on changing to fill out parameter and determine, usually consider practice of construction demand, excavate parameter and fills out slightly larger than changing
Parameter.Based on parameter is excavated, the roadbed in subregion is carried out to excavate foundation pit 10, lightweight replacing method 1 is poured in foundation pit 10, with
Huan Tian base 3 is formed, road 4 yet to be built is laid in Huan Tian base 3, finally completes whole road construction construction.
A kind of road construction method of section conllinear with rail traffic provided in this embodiment, first by conllinear section region along to
The length direction for building road is in turn divided into multiple subregions, selects similar in earthing situation that one section of region is as a subregion, so
Changing for each subregion is calculated afterwards and fills out parameter, then determines and excavates parameter, and excavation base is carried out to the roadbed in subregion according to parameter is excavated
Hole, lightweight replacing method is poured in foundation pit, a part of earthing at the top of built rail traffic structure is changed to fill out to change for lightweight and is filled out
Material is finally laid with road yet to be built to form Huan Tian base in Huan Tian base.The road construction method changes filling chock using lightweight
Material subregion, which changes, fills out conllinear section region, guarantees right above rail traffic structure and its a certain range of newly-increased around after the completion of constructing
Additional load is substantially zeroed, solves the highway layout and construction difficult problem of section conllinear with built rail traffic, proposes a kind of peace
Complete feasible scheme is as reference, and project cost also controls within the acceptable range.
Further, as shown in Fig. 2, step S20 further comprises:
Step S21: the width direction by the two sides sideline of built rail traffic along built rail traffic respectively extends in advance outward
If distance, pre-determined distance is more than or equal to the depth of burying of built rail traffic, fills out width to obtain changing.
Specifically, the depth of burying (distance on the distance from top ground of i.e. built rail traffic structure) of built rail traffic
Usually 6-10 meters.By taking the depth of burying is 8 meters as an example, the width of built rail traffic structure is 14 meters, then changes and fill out width at least
It is 30 meters, and changes the centerline parallel of the center line Yu built rail traffic structure of filling out region, thus can guarantees that construction is completed
Afterwards right above rail traffic structure and its in at least each one times of structure of the subway bottom buried depth coverage in outer edge two sides increase newly it is attached
Loading carries substantially zeroed.
Further, as shown in Fig. 2, step S20 further comprises:
Step S22: based on earthing bulk density and thickness average value, the bulk density of road yet to be built 4 and thickness and light in subregion
The bulk density of matter replacing method 1, according to etc. loads change and fill out principle, calculate the thickness of lightweight replacing method 1, fill out depth to obtain changing.
Specifically, waiting loads to change, to fill out principle be to retain certain earthing at the top of rail traffic structure not disturb, and it is each to create road
The sum of layer structure and the vertical load for changing filler are identical as former overburden load, that is, meet following formula:
∑ RiHi=R0H0
Wherein, Ri is i-th layer of packed bulk density (kN/m of roadbed3), Hi is i-th layer of depth of packing (m) of roadbed, and R0 is in subregion
Subway earthing value of bulk density (kN/m3), H0 is the practical thickness of earth covering average value (m) of subway in subregion.Newly-built each layer knot of road
Structure also corresponds to filler.
Further, as shown in Fig. 2, after step s 22, further includes:
Step S23: filling out depth based on changing, and calculates stability coefficient k.
Step S24: it when stability against floating property coefficient is more than or equal to 1.2, fills out depth to change and changes to calculate and fill out depth；Or
Person
When stability against floating property coefficient is less than 1.2, adjustment, which is changed, fills out depth, until stability against floating property coefficient is equal to or more than
1.2, depth is filled out with new changing and fills out depth to calculate to change.
Specifically, Fig. 3 is the schematic diagram of one of embodiment of the present invention antifloating computation model, as shown in figure 3, anti-floating is steady
Qualitative coefficient k can solve as the following formula:
Wherein, the meaning of each symbol is as shown in the table in Fig. 3:
| Symbol | Unit | Physical significance |
| c | m | Gravel sand pads cushion thickness |
| d | m | Road surface structare layer thickness |
| Ls | m | It changes and fills out depth |
| HF | m | Lightweight replacing method roadbed height |
| H0 | m | Original ground controls elevation |
| H1 | m | Lightweight replacing method roadbed bottom elevation |
| H2 | m | Lightweight replacing method roadbed crest level |
| H3 | m | Pavement Design elevation |
| Hw | m | Hydrostatic water table elevation |
| R0 | kN/m3 | Plain soil severe, averagely takes 20 |
| R1 | kN/m3 | Lightweight replacing method severe |
| R2 | kN/m3 | Road surface structare layer severe |
| R3 | kN/m3 | Gravel sand bedding course severe, averagely takes 23.0 |
| Rw | kN/m3 | Water severe, takes 9.8 |
The severe value that the severe of the Foam lightweight soil used in stability calculation model is provided by manufacturer, this severe
For the bulk volume severe of material comprising silent inside Foam lightweight soil and opening gap；And in the true buoyancy of roadbed
In, the gap of opening is the accessibility space of underground water, therefore the clearance gap in Foam lightweight soil is not generate buoyancy, is produced
The part of capture power should be the true volume of light soil and silent gap.Stability against floating coefficient k >=1.2 explanations are calculated
Meet anti-floating requirement.If stability against floating coefficient k < 1.2, needs to adjust to change and fill out depth, until stability against floating property coefficient is equal to
Or it is greater than 1.2, depth is then filled out with new changing and fills out depth to calculate to change.
Further, after step S24, further includes:
Step S25: when calculating change fill out depth greater than predetermined limit change fill out depth when, subregion is further subdivided into multiple
Child partition recalculates changing for each child partition and fills out parameter；Or
When calculating change fill out depth changed less than or equal to predetermined limit fill out depth when, change that fill out depth be finally to change and fill out to calculate
Depth.
Specifically, the earthing average thickness based on the subregion, in conjunction with actual use demand, an available predetermined limit
It changes and fills out depth, which, which changes, fills out being the largest to change and filling out depth for depth representing, then may be over the ground if it is greater than the depth
Lower railway transport structure generates certain disturbance, thus needs to guarantee to calculate to change to fill out depth and change less than or equal to predetermined limit and fill out
Depth.Thus, when calculating change fill out depth greater than predetermined limit change fill out depth when, indicate the severe and thickness of the earthing in the subregion
It changes greatly, then the subregion is further subdivided into multiple child partitions, then based on child partition, recalculate every height point
Parameter is filled out in changing for area.
Further, it as shown in fig. 6, after obtaining changing and filling out parameter, according to practice of construction demand, obtains and excavates parameter,
Based on parameter is excavated start that earthing change filling out, first the construction process on the length direction of road construction is described.
Step S30 further comprises:
Step S31: the length direction by subregion along road 4 yet to be built is divided into multiple construction sections by default spacing；
Step S32: slope is carried out to construction section and is excavated to the first cutting depth S1, injection steel sheet pile supporting 11, under vertical
It digs to the second cutting depth S2；
Step S33: it is laid with gravel sand bedding course 2 in the bottom of foundation pit 10, placement layer by layer lightweight replacing method 1 to design is marked
It is high；
Step S34: repeating the above steps, until completing the construction of all construction sections.
Further, when the construction section is not or not first construction section, after step s 32, before step S34, also
Include:
The steel sheet pile supporting 11 between a upper construction section and current construction section is pulled out, deformation joint is set.Pull out steel
A gap is generated between two construction sections after sheet pile supporting 11, the size in the gap can be changed by pouring lightweight
Filling chock material is changed.Buffer function can be played to the heat expansion of road by the way that deformation joint is arranged.
Specifically, it is illustrated by taking two construction sections as an example in the present embodiment.
The first step removes building waste to former Metro Design ground elevation, by subregion along yet to be built as shown in a figure in Fig. 6
The length direction of road 4 is divided into two construction sections, i.e. the first construction section 61 and the second construction section 62 by default spacing.Between default
Away from being 10 meters.
Second step carries out 1:1 slope excavation to the first construction section 61, until the first cutting depth as shown in the b figure in Fig. 6
S1.In the present embodiment, it is the half of the cutting depth of foundation pit 10 that the first cutting depth S1, which is equal to the second cutting depth S2,.
Third step distinguishes one group of steel sheet pile supporting 11 of injection along the two sides for excavating boundary as shown in the c figure in Fig. 6.
4th step, as shown in the d figure in Fig. 6, along the length direction of steel sheet pile supporting 11, vertical lower dig to second is excavated deeply
Spend S2.
5th step is laid with the gravel sand bedding course 2 of 20cm thickness in the bottom of foundation pit 10, and look for as shown in the e figure in Fig. 6
After flat, then in the inside of steel sheet pile supporting 11 protection panels 12 are applied, then placement layer by layer lightweight replacing method 1 to design is marked
It is high.
The height of protection panels 12 and lightweight replacing method 1 to pour designed elevation identical.The material of protection panels 12 can
To use lightweight replacing method 1, after pouring to lightweight replacing method 1, protection panels 12 merge fixation therewith, are also beneficial to
Later period pulls out steel sheet pile supporting 11.
6th step carries out 1:1 slope excavation to the second construction section 62, until the first cutting depth as shown in the f figure in Fig. 6
S1；Along the one group of steel sheet pile supporting 11 of right side injection for excavating boundary；It is vertical lower to dig to the along the length direction of steel sheet pile supporting 11
Two cutting depth S2；Be laid with the gravel sand bedding course 2 of 20cm thickness in the bottom of foundation pit 10, and it is levelling after, then in steel sheet pile supporting
11 inside applies protection panels 12.
7th step pulls out the steel plate between the first construction section 61 and the second construction section 62 as shown in the g figure in Fig. 6
So as to the use of next round trip, while deformation joint is arranged in stake supporting 11.
8th step pours lightweight replacing method 1 into the foundation pit of the second construction section 62 to design as shown in the h figure in Fig. 6
Absolute altitude.
The construction process of the construction section of remaining quantity can refer to above-mentioned steps, and details are not described herein again.
Further, the construction process on the cross-sectional direction to road construction is described.First illustrate conllinear section area
Structure on the cross-sectional direction in domain from top to bottom successively includes as shown in Figure 4 and Figure 5 road 4 yet to be built, lightweight replacing method
Layer and gravel sand bedding course, lightweight replacing method layer and gravel sand bedding course collectively form Huan Tian base 3.Wherein road 4 yet to be built includes
It is located in the middle carriage way 41 and the Route for pedestrians 42 positioned at two sides, the carriage way 41 in the present embodiment includes car lane
And non-motorized lane.One retaining wall 7 is respectively set in the two sides of Huan Tian base 3, is equipped with people's row guardrail 71 above retaining wall 7.Together
When municipal pipeline 5, such as rain pipe 51, sewage pipe 52 and remaining electric power, communication tube be arranged at the outside of retaining wall 7.
When carrying out the construction of municipal pipeline 5, first in preset location vertically lower digging, installation tunnel is formed, pipeline is then laid, finally utilizes
Backfill yellow ground 53 backfills levelling.After complete to road pavement, foundation pit is backfilled using plain soil 6, keeps the level of both sides of the road.
One layer of anti-seepage geomembrane 9 is all set in the surrounding of lightweight replacing method layer, prevents water from entering.It is changed simultaneously in lightweight
One layer of galvanized wire mesh 8 is additionally provided between the filling chock bed of material and the road yet to be built 4 on upper layer, to play the role of fixed support.When
When the thickness of lightweight replacing method layer is larger, multiple galvanized wires can also be set inside lightweight replacing method layer as needed
Net 8.
As shown in fig. 7, step S33 further comprises when road 4 yet to be built includes carriage way 41 and Route for pedestrians 42:
Firstly, the first gravel sand bedding course 2-1 is laid in the bottom of foundation pit 10, in the first gravel as shown in a figure in Fig. 7
The upper layer of sand bedding course 2-1 degressively placement layer by layer lightweight replacing method 1 step by step from the bottom to top, in positive stairstepping, to form the
One Huan Tian base 3-1 is laid with carriage way 41 on the first Huan Tian base 3-1.
Then, it as shown in the c figure in Fig. 7, applies and finishes and then in the bottom of foundation pit 10 in the first Huan Tian base 3-1
It is laid with the second gravel sand bedding course 2-2, in the upper layer of the second gravel sand bedding course 2-2 incrementally placement layer by layer lightweight step by step from the bottom to top
Replacing method 1, to form the second Huan Tian base 3-2, is laid with Route for pedestrians on the second Huan Tian base 3-2 in stairstepping is swung to
42.Wherein, the first Huan Tian base 3-1 and the second Huan Tian base 3-2 is complementary.
It should be noted that (1) Foam lightweight soil single layer pours thickness and should control in 0.3~1.0m range；
(2) the pouring construction time of the single pouring area pouring layer of Foam lightweight soil should control in the cement mortar presetting period
Interior, upper layer pouring layer only can pouring construction after adjacent lower layer's pouring layer final set；
(3) it should be poured as far as possible along pouring area long axis direction from one end to the other end；It is poured as poured pipe using one or more
When building, then it can abreast be poured since one end or mode is poured using diagonal；
(4) it in casting process, when needing movement to pour pipe, should be moved forward and backward along the direction for pouring pipe design, and it is unsuitable
It moves left and right and pours pipe；
(5) when chance heavy rain or heavy rain or long-term light rain weather, uncured Foam lightweight soil surface should adopt
Take rain cover measure.
Further, it as shown in the b figure in Fig. 7, after the first Huan Tian base 3-1 is applied and finished, is spread in foundation pit 10
If before the second gravel sand bedding course 2-2, further includes: build retaining wall 7 along the boundary line of Route for pedestrians 42 in foundation pit 10.
Further, step S30 further comprises: laying anti-seepage geomembrane 9 in the surrounding of lightweight replacing method 1, is changing
Fill out laying galvanized wire mesh 8 between base 3 and road yet to be built 4.
Further, as shown in figure 8, the earthing in road yet to be built 4 and the non-colinear section region of built rail traffic and changing is filled out
The junction of base 3 is stepped, and is attached by overlap joint film and galvanized wire mesh 8.
Specifically, region of the road 4 yet to be built other than conllinear section is non-colinear section, and non-colinear section region can be adopted
With general subgrade processing method.Therefore the connection with non-colinear section road is all referred at the head and the tail both ends of conllinear section road.Such as Fig. 8
It is shown, it is conllinear section region in the area A in the left side of works scope line D-D, applies to change and fill out roadbed.Works scope line D-D's
The area B on right side is non-colinear section region, applies general subgrade.The pavement structure of road yet to be built 4 on two kinds of roadbeds is identical, this
The pavement structure of road yet to be built 4 in embodiment includes three layers, from top to bottom respectively asphalt concrete pavement 43,4% cement
Stabilized macadam base 44 and C30 element concrete bed course 45.It includes 1 He of lightweight replacing method that the changing of conllinear section region (area A), which fills out roadbed,
The gravel sand bedding course 2 of 20cm.The general subgrade in non-colinear section region (area B) includes the 6% rendzinas roadbed treatment floor 46 of 80cm
And element soil 6.
The interface of two kinds of roadbeds is ladder-like, and passes through overlap joint film (such as HDPE anti-seepage geomembrane) and galvanized wire mesh
8 are attached.
It can be seen from the above embodiments that, the road construction method of section conllinear with rail traffic provided by the invention, it is first
Conllinear section region is first in turn divided into multiple subregions along the length direction of road yet to be built, selects one section of area similar in earthing situation
Then domain calculates changing for each subregion and fills out parameter as a subregion, then determine and excavate parameter, according to excavation parameter in subregion
Roadbed carry out excavation foundation pit, lightweight replacing method is poured in foundation pit, a part at the top of built rail traffic structure is covered
Soil changes to fill out finally is laid with road yet to be built for lightweight replacing method to form Huan Tian base in Huan Tian base.The road construction side
Method is changed using lightweight replacing method subregion and fills out conllinear section region, guarantees rail traffic structure surface and its surrounding after the completion of construction
A certain range of newly-increased additional load is substantially zeroed, and highway layout and the construction for solving section conllinear with built rail traffic are difficult
Topic proposes a kind of scheme of safe and feasible as reference, and project cost also controls within the acceptable range.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of road construction method of section conllinear with rail traffic characterized by comprising
Earthing situation based on road yet to be built Yu the conllinear section region of built rail traffic, by the conllinear section region along it is described to
The length direction for building road is in turn divided into multiple subregions；
Based on the earthing situation in the subregion, calculates each changing for the subregion and fill out parameter；
The determining excavation parameter of parameter is filled out based on described change, excavation foundation pit is carried out to the roadbed in the subregion, in the foundation pit
Lightweight replacing method is poured, to form Huan Tian base, the road yet to be built is laid in the Huan Tian base.
2. the road construction method of section conllinear with rail traffic according to claim 1, which is characterized in that described to be based on institute
The earthing situation in subregion is stated, each changing for the subregion is calculated and fills out parameter, further comprise:
By the two sides sideline of the built rail traffic along the width direction of the built rail traffic respectively extend outward it is default away from
From the pre-determined distance is more than or equal to the depth of burying of the built rail traffic, fills out width to obtain changing.
3. the road construction method of section conllinear with rail traffic according to claim 1, which is characterized in that described to be based on institute
The earthing situation in subregion is stated, each changing for the subregion is calculated and fills out parameter, further comprise:
Based on earthing bulk density and thickness average value in the subregion, the bulk density of the road yet to be built and thickness and the lightweight
The bulk density of replacing method, according to etc. loads change and fill out principle, calculate the thickness of the lightweight replacing method, fill out depth to obtain changing.
4. the road construction method of section conllinear with rail traffic according to claim 3, which is characterized in that in the calculating
The thickness of the lightweight replacing method out, is filled out after depth with obtaining changing, further includes:
Depth is filled out based on described change, calculates stability against floating property coefficient；
When the stability against floating property coefficient is more than or equal to 1.2, fills out depth with described change and change to calculate and fill out depth；Or
It when the stability against floating property coefficient is less than 1.2, is changed described in adjustment and fills out depth, until the stability against floating property coefficient is equal to
Or it is greater than 1.2, depth is filled out with new changing and fills out depth to calculate to change.
5. the road construction method of section conllinear with rail traffic according to claim 4, which is characterized in that work as institute described
It when stating stability against floating property coefficient less than 1.2, is changed described in adjustment and fills out depth, until the stability against floating property coefficient is equal to or more than
1.2, depth is filled out with new changing and is filled out after depth to calculate to change, further includes:
When it is described calculating change fill out depth greater than predetermined limit change fill out depth when, by the subregion be further subdivided into it is multiple son point
Area recalculates each changing for the child partition and fills out parameter；Or
When the calculating change fill out depth changed less than or equal to predetermined limit fill out depth when, change that fill out depth be final with the calculating
It changes and fills out depth.
6. the road construction method of section conllinear with rail traffic according to claim 1, which is characterized in that described to be based on institute
It states to change and fills out the determining excavation parameter of parameter, excavation foundation pit is carried out to the roadbed in the subregion, lightweight is poured in the foundation pit and changes
Filling chock material is laid with the road yet to be built in the Huan Tian base, further includes steps of to form Huan Tian base
Length direction by the subregion along the road yet to be built is divided into multiple construction sections by default spacing；
Slope is carried out to the construction section and is excavated to the first cutting depth, injection steel sheet pile supporting, vertical lower dig to second is excavated
Depth；
Gravel sand bedding course, placement layer by layer lightweight replacing method to designed elevation are laid in the bottom of foundation pit；
It repeats the above steps, until completing the construction of all construction sections.
7. the road construction method of section conllinear with rail traffic according to claim 6, which is characterized in that when the construction
When section is not the first construction section, first cutting depth, injection steel sheet pile branch are excavated to construction section progress slope described
Shield after vertical lower digging to the second cutting depth, is laid with gravel sand bedding course in the bottom in foundation pit, placement layer by layer lightweight is changed
Before filling chock material to designed elevation, further includes:
The steel sheet pile supporting between a upper construction section and the construction section is pulled out, deformation joint is set.
8. the road construction method of section conllinear with rail traffic according to claim 6, which is characterized in that described in foundation pit
Bottom be laid with gravel sand bedding course, placement layer by layer lightweight replacing method to designed elevation further comprises:
When the road yet to be built includes carriage way and Route for pedestrians, the first gravel sand pad first is laid in the bottom of the foundation pit
Layer, in the upper layer of the first gravel sand bedding course degressively placement layer by layer lightweight replacing method step by step from the bottom to top, to form the
One Huan Tian base is laid with the carriage way in first Huan Tian base；
First Huan Tian base apply finish and then the foundation pit bottom be laid with the second gravel sand bedding course, in institute
The upper layer of the second gravel sand bedding course incrementally placement layer by layer lightweight replacing method step by step from the bottom to top is stated, is changed with to form second and fills out base
Layer, is laid with the Route for pedestrians in second Huan Tian base；
First Huan Tian base and second Huan Tian base are complementary.
9. the road construction method of section conllinear with rail traffic according to claim 8, which is characterized in that described first
Huan Tian base applies finish after, be laid in the foundation pit before the second gravel sand bedding course, further includes:
Retaining wall is built along the boundary line of the Route for pedestrians in the foundation pit.
10. the road construction method of section conllinear with rail traffic according to claim 1, which is characterized in that described to be based on
Described change fills out the determining excavation parameter of parameter, carries out excavation foundation pit to the roadbed in the subregion, pours lightweight in the foundation pit
Replacing method is laid with the road yet to be built in the Huan Tian base, further comprises to form Huan Tian base:
Anti-seepage geomembrane is laid in the surrounding of the lightweight replacing method, is applied between the Huan Tian base and the road yet to be built
If galvanized wire mesh.
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