CN205576637U - Processing closes on roadbed structure of existing line soft soil foundation - Google Patents
Processing closes on roadbed structure of existing line soft soil foundation Download PDFInfo
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- CN205576637U CN205576637U CN201620278186.1U CN201620278186U CN205576637U CN 205576637 U CN205576637 U CN 205576637U CN 201620278186 U CN201620278186 U CN 201620278186U CN 205576637 U CN205576637 U CN 205576637U
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Abstract
The utility model discloses a processing closes on roadbed structure of existing line soft soil foundation, its characterized in that, still including lay the mattress layer at weak soil layer top with lay in mattress layer top, close on the road bed of existing circuit, set up the rigidity stake from toe to the dead line interval that the road bed was kept away from on one side of the existing circuit in the weak soil layer of mattress layer bottom, it sets up the flexibility and spouts the stake soon to close on toe to dead line interval on one side of the existing circuit from the road bed in the weak soil layer of mattress layer bottom, the weak soil layer is passed to the hard stratum in at the bottom of spouting stake and rigidity stake soon to the flexibility. The utility model discloses not only effectively improved the foundation bearing capacity, the post -construction settlement who has reduced the road bed has guaranteed the stability of weak soil road bed still can not produce negative effects to the safety operation of existing line. The utility model discloses roadbed structure structural style is simple, and stratum adaptability is good, and the technique is reasonable, expense economy, has comparatively wide popularization and application and worth.
Description
Technical field
This utility model relates to Geotechnical Engineering field, closes on existing in particular to one process
The road structure of line soft soil foundation.
Background technology
For ensureing high speed traveling safety, post-construction settlement of subgrade is required high by high-speed railway,
Ballastless track roadbed settlement after construction is typically not to be exceeded 15mm, bridge or tunnel road changeover portion
Relative settlement not should be greater than 5mm.High-speed railway is built and because of by yard in soft clay area
Or other conditions limit, it is necessary to when using roadbed form to pass through, then need to take reasonably
Measures of foundation treatment, so that post-construction settlement of subgrade is within control standard.At present to soft
The rigidity CFG pile composite foundation for the treatment of measures many employings single type of soil base, the most often
For CFG stake pile net structure composite foundation, " net " in " stake net " structure be sand,
Rubble and direction earthwork grille form certain thickness mattress layer, and " stake " is CFG stake, makes
Upper load is evenly transferred to lower sleeping soil layer, to meet ground requirement for bearing capacity, effectively controls
Settlement after construction.Chinese utility model patent (Publication No. CN101148891A) is " for height
Speed highway soft soil ground process in rigid and flexible long-short pile composite foundation " in disclosed a kind of just
Property the long stake of CFG stake, flexible stub be alternately distributed settings, upper end laying mattress layer structure.
Flourish along with railway construction in China cause, the railway network is the most flourishing, newly-built
Railway and existing railway line inevitably produce parallel.To newly built railway soft soil foundation
When carrying out CFG stake stake net basement process, because CFG pile machine equipment height reaches more than 24m,
Center of gravity is high, and self-stability is poor, and needs the most mobile in work progress, it is impossible to effectively protect,
Having topples invades the possibility of the most wired safety clearance, and the most wired safe operation is caused danger
Danger；After another each construction terminates, construction equipment must be removed beyond safe distance, can be big
Extend greatly the duration, increase engineering cost.
Therefore for above-mentioned situation, need to develop a kind of consolidation process and close on the most wired
The road structure of high-speed railway soft soil foundation, can not only improve foundation bearing capacity, reduces road
Base settlement after construction, also will not have a negative impact to the most wired safe operation during construction.
Summary of the invention
The purpose of this utility model seeks to solve the deficiency of above-mentioned background technology, it is provided that a kind of
Not only met post-construction settlement of subgrade and the requirement of bearing capacity, but also can protect the most wired safe operation,
Process the road structure closing on the most wired high-speed railway soft soil foundation.
The technical solution of the utility model is: a kind of process closes on the road of the most wired soft soil foundation
Based structures, it is characterised in that include the mattress layer being laid on Soft Soil Layer top and be laid on cotton-padded mattress
Above bed course, close on the roadbed of existing line, below described mattress layer at margin of safety to
In the roadbed toe region away from existing line side, along the longitudinally disposed multiple rows of rigidity of circuit
CFG stake, closes on existing line side to roadbed below described mattress layer at margin of safety
In toe region, along the longitudinally disposed multiple rows of flexible rotary churning pile of circuit, described flexible rotary churning pile and
Both passing through Soft Soil Layer at the bottom of the stake stake of rigidity CFG in hard stratum, stake top is all to Soft Soil Layer end face.
Preferably, described flexible rotary churning pile stake footpath is 0.6-0.7m, and pile spacing is 2-3 times of stake
Footpath；Described rigidity CFG stake stake footpath is 0.5-0.6m, and pile spacing is 3-5 times of stake footpath.
Preferably, described mattress layer the most successively by blotter, medium coarse sand bed course,
Direction earthwork grille, the second medium coarse sand bed course and the second blotter are laid and are formed.
Preferably, described rigidity CFG stake is provided with pile cover, and described pile cover top flushes in soft
Property rotary churning pile top.
Preferably, distance between adjacent two row's rigidity CFG stakes between multiple rows of rigidity CFG stake
Equal, often between row's rigidity CFG stake, the spacing of adjacent two rigidity CFG stakes side by side is equal；
Between multiple rows of flexible rotary churning pile, the distance between adjacent two row's flexibility rotary churning piles is equal, often arranges flexibility
Between rotary churning pile, the spacing of adjacent two flexible rotary churning piles side by side is equal.
Further, between adjacent two row's rigidity CFG stakes, horizontal between adjacent two row's flexibility rotary churning piles
To alignment or laterally staggered arrangement.
Preferably, it is provided with the string stress along roadbed is longitudinal between described roadbed and existing line to release
Discharge hole, described stress relief hole hole depth is with the degree of depth, spacing 3-4m at the bottom of flexible rotary churning pile stake.
The toe that preferably, the flexible rotary churning pile of each row closes on existing line side at roadbed is outer,
Continue to existing line direction to arrange 1-2 root flexibility rotary churning pile, each row rigidity CFG Zhuan road
Base is outer away from the toe of existing line side, continue to arrange 1-2 to away from existing line direction
Root rigidity CFG stake.
Advantage of the present utility model is:
1. use CFG pile machine equipment that rigidity CFG is set outside 23-25m margin of safety
Stake, the height of the outer CFG stake machine 25m of margin of safety will not cause danger to the most wired, also
Efficiency of construction will not be reduced；Inner side uses the rotary churning pile machine equipment of height 3m to arrange rotary churning pile,
Therefore within safety clearance, use rotary churning pile to carry out reinforced soft soil ground, both protected both Wired Security
Also efficiency of construction can be improved.
2. by the stake of rigidity CFG and flexible rotary churning pile with the use of, gathered the stake of rigidity CFG
The crowd in-out effects of the heavy and flexible rotary churning pile of control, top covers mattress layer and can play more fully
The bearing capacity of inter-pile soil, had both met the control requirement of settlement after construction, had greatly reduced again work
Journey cost.
The most not only it is effectively increased foundation bearing capacity, decreases the settlement after construction of roadbed, it is ensured that
The stability of high-speed railway soft soil subgrade, also will not produce negative to the most wired safe operation
Face rings.This utility model foundation reinforcing structure form is simple, and ground adaptability is good, technology
Rationally, cost, there is the most wide application value.
Accompanying drawing explanation
Fig. 1 is that this utility model is along roadbed transversary schematic diagram
Fig. 2 is that mattress layer is along roadbed transversary schematic diagram
Fig. 3 is that rigidity CFG stake equilateral triangle arranges schematic diagram
Fig. 4 is rigidity CFG stake arranged in squares schematic diagram
Wherein: 1. the flexible rotary churning pile of roadbed 2. Soft Soil Layer 3. hard stratum 4. rigidity CFG stake 5.
6. mattress layer 7. pile cover 8. stress relief hole 9. existing line 10. margin of safety 6.1 rubble
Bed course 6.2 medium coarse sand bed course 6.3 direction earthwork grille 6.4 second medium coarse sand bed course 6.5
Two blotters.
Detailed description of the invention
With specific embodiment, this utility model is made the most below in conjunction with the accompanying drawings
Bright.
As it is shown in figure 1, this utility model offer processes the roadbed closing on the most wired soft soil foundation
Structure, soft soil foundation structure from bottom to up includes hard stratum 3, is positioned at above hard stratum 3
Soft Soil Layer 2, this utility model road structure includes the mattress layer being laid on Soft Soil Layer 2 top
6 and be laid on above mattress layer 6, close on the roadbed 1 of existing line 9, roadbed 1 side
For existing line 9 (being right side in the present embodiment).The safety limit of this utility model existing line
When limit 10 is construction rigidity CFG stake, equipment does not produce the horizontal boundary of impact to existing line 9
Limit, the margin of safety 10 of existing line 9 is positioned at roadbed 1, roadbed 1 in the present embodiment
Closing on existing line 9 side toe is inner side toe, away from existing line 9 side toe is
Outside toe.
In Soft Soil Layer 2 below mattress layer 6 outside roadbed 1 toe to margin of safety 10
Locate, multiple rows of rigidity CFG stake 4, the weak soil below mattress layer 6 are set along circuit is longitudinally spaced
In layer 2 at toe inside roadbed 1 to margin of safety 10, along the longitudinally spaced setting of circuit
Multiple rows of flexible rotary churning pile 5.I.e. soft soil foundation outside existing line 9 margin of safety 10 uses
Rigidity CFG stake 4, uses flexible rotary churning pile 5 within safety clearance 10.
Rigidity CFG stake 4 is provided with pile cover 7, and pile cover 7 top flushes in flexible rotary churning pile 5
Top is to Soft Soil Layer 2 end face.Bed pad is laid on flexible rotary churning pile 5 and rigidity CFG stake 4 top
Layer 6, through Soft Soil Layer 2 to hard stratum 3 at the bottom of flexible rotary churning pile 5 and rigidity CFG stake 4
In.As in figure 2 it is shown, mattress layer 6 is the most successively by blotter 6.1, medium coarse sand
Bed course 6.2, direction earthwork grille the 6.3, second medium coarse sand bed course 6.4 and the second blotter
6.5 composition.
Between multiple rows of rigidity CFG stake 4, the distance between adjacent two row's rigidity CFG stakes 4 is equal,
Often between row's rigidity CFG stake 4, the spacing of adjacent two rigidity CFG stakes 4 side by side is equal；
Between multiple rows of flexible rotary churning pile 5, the distance between adjacent two row's flexibility rotary churning piles 5 is equal, often arranges
Between flexible rotary churning pile 5, the spacing of adjacent two flexible rotary churning piles 5 side by side is equal.This practicality
In novel between adjacent two row's rigidity CFG stakes 4, the most right between adjacent two row's flexibility rotary churning piles 5
Neat arrangement or laterally staggered arrangement, adjacent four formation pros between adjacent two rows time laterally aligned
Shape；Adjacent three formation equilateral triangles between adjacent two rows time laterally staggered.Rigidity CFG stake 4
Equilateral triangle arrangement as it is shown on figure 3, square arrangement as shown in Figure 4, in Fig. 3-4 left and right
To for circuit longitudinally, upward and downward is that circuit is horizontal.No matter it is square or equilateral triangle row
Row, between arbitrary neighborhood rigidity CFG stake 4, pilespacing is identical.Flexible rotary churning pile 5 and rigidity
CFG stake 4 is in like manner arranged, and repeats no more.Wherein, flexible 5 footpath d of rotary churning pile2For
0.6-0.7m, pile spacing D2For 2-3 times of stake footpath；4 footpath d of rigidity CFG stake1For 0.5-0.6m,
Pile spacing D1For 3-5 times of stake footpath.
It is provided with the string stress along roadbed is longitudinal inside roadbed 1 between toe and existing line 9 to release
Discharge hole 8, stress relief hole 8 hole depth is with the degree of depth at the bottom of flexible rotary churning pile 5, and (the present embodiment is deep
5-13m), pitch of holes 3-4m.Each row flexible rotary churning pile 5 toe inside roadbed 1 is outer,
Continue to existing line 9 direction to arrange 1-2 root flexibility rotary churning pile 5, each row rigidity CFG stake
4 outside roadbed 1 toe outer, firm to continuing to arrange 1-2 root away from existing line 9 direction
Property CFG stake 4.
The construction method of this utility model said structure is:
A. flatten place before stiffening basic ground, rear surveying setting-out, refer to fixed pile, from safety
Outside the newly-built roadbed extremely designed at boundary 10, toe (now also do not lay, root by roadbed 1
Toe position is determined according to design) multiple rows of rigidity CFG stake 4 of longitudinally constructing in region, along circuit,
Stake footpath d1For 0.5-0.6m, pile spacing D13-5 times of stake footpath of general employing, the present embodiment is preferred
4 footpath d of rigidity CFG stake1=0.5m, pile spacing D1=5 times of stake footpaths, square or positive three
Dihedral lay out pile (pile arrangement in the most aforementioned road structure, as shown in Figure 3-4), on-the-spot cloth
Typically arrange toward both sides toe from roadbed center line during stake, until outside roadbed, toe is outer, Xiang Yuan
From existing line 9 direction (), each row also continues to be provided with 1-2 root rigidity CFG in Fig. 1 to the left
Stake 4 (the present embodiment preferably 1), the long Soft Soil Layer that has to penetrate through in principle of stake is to hard formation, tool
Body need to be determined by sedimentation inspection according to settlement Control standard.Rigidity CFG stake 4 top sets pile cover
7, expand pile cover, pile cover top width 0.9m, high 0.5m, cast in situs C25 coagulation for circle
Soil.
B. offer between toe and existing line 9 along roadbed 1 longitudinally inside the roadbed 1 of design
String stress relief hole 8, stress relief hole 8 upper end and Soft Soil Layer 2 either flush, hole
Footpath 127mm, spacing 3m.At margin of safety 10 to design roadbed 1 inside toe district
In territory, along the circuit longitudinally construction flexible rotary churning pile 5 of multiple rows of construction, stress relief hole 8 can be to the greatest extent
Amount reduces the flexible rotary churning pile 5 impact on existing line 9, the degree of depth at the bottom of flexible rotary churning pile 5
Identical with stress relief hole 8 hole depth.When scene lays out pile typically from roadbed 1 center line toward two side slopes
Foot is arranged, until toe is outer, to closing on existing line 9 direction (Fig. 1 inside roadbed 1
In to the right) each row also continues to be provided with 1-2 root flexibility rotary churning pile 5 (the present embodiment preferably 2),
Stake footpath d2For 0.6-0.7m, pile spacing D2For 2-3 times of stake footpath, the preferably flexible rotation of the present embodiment
Spray 5 footpath d of stake2=0.6m, pile spacing D2=3 times of stake footpaths, square or equilateral triangle lay out pile
(pile arrangement in the most aforementioned road structure), specifically need to pass through according to settlement Control standard
Sedimentation inspection determines.Soft Soil Layer is both passed through extremely at the bottom of rigidity CFG stake 4 and flexible rotary churning pile 5
Hard stratum, stake top is all to Soft Soil Layer end face, rigidity CFG stake 4 (including pile cover 7), flexibility
The stake top of rotary churning pile 5 is the most concordant with at the bottom of stake.
C. design is reached by force when rigidity CFG stake 4 and flexible rotary churning pile 5 concrete strength of pile
After degree, rigidity CFG stake 4 and flexible rotary churning pile 5 top, Soft Soil Layer 2 top set 0.6m
Thick mattress layer 6, one layer of direction earthwork grille 10 of interior laying, two ends inflection is not less than 2.0m,
Tensile strength is not less than 110kN/m, is 20cm blotter by thickness the most successively
6.1,10cm medium coarse sand bed course 6.2, direction earthwork grille 6.3,10cm the second medium coarse sand pad
Layer 6.4 and 20cm second blotter composition.
D. by design roadbed paving 1 above blotter 6 of the most newly-built roadbed, roadbed 1
Toe edge is concordant with mattress layer 6 transverse edge.
In this utility model, CFG pile machine equipment height reaches more than 24m, therefore margin of safety
10 is away from the horizontal 23-25m of existing line, uses CFG pile machine equipment to set outside margin of safety
Putting the stake of rigidity CFG, CFG stake machine height will not cause danger to the most wired；Inner side uses
The rotary churning pile equipment of highly 3m arranges rotary churning pile, has both protected both Wired Security also can improve and has executed
Work efficiency rate.
Claims (8)
1. a process closes on the road structure of the most wired soft soil foundation, it is characterised in that bag
Include and be laid on the mattress layer (6) at Soft Soil Layer (2) top and be laid on mattress layer (6)
Side, closing on the roadbed (1) of existing line (9), described mattress layer (6) lower section is from safety
In boundary (10) place to the roadbed (1) toe region away from existing line (9) side,
Along the longitudinally disposed multiple rows of rigidity CFG stake (4) of circuit, described mattress layer (6) lower section is from peace
Full boundary (10) place to roadbed (1) closes in the toe region of existing line (9) side,
Along the longitudinally disposed multiple rows of flexible rotary churning pile (5) of circuit, described flexible rotary churning pile (5) and firm
Property CFG stake (4) stake at the bottom of both pass through Soft Soil Layer (2) in hard stratum (3), stake top is equal
To Soft Soil Layer end face.
2. road structure as claimed in claim 1, it is characterised in that described flexible churning
Stake (5) stake footpath is 0.6-0.7m, and pile spacing is 2-3 times of stake footpath；Described rigidity CFG stake
(4) stake footpath is 0.5-0.6m, and pile spacing is 3-5 times of stake footpath.
3. road structure as claimed in claim 1, it is characterised in that described mattress layer (6)
The most successively by blotter (6.1), medium coarse sand bed course (6.2), two-way geotechnique's lattice
Grid (6.3), the second medium coarse sand bed course (6.4) and the second blotter (6.5) are laid and are formed.
4. road structure as claimed in claim 1, it is characterised in that described rigidity CFG
Stake (4) is provided with pile cover (7), and described pile cover (7) top flushes in flexible rotary churning pile (5)
Top.
5. road structure as claimed in claim 1, it is characterised in that multiple rows of rigidity CFG
Between stake (4), the distance between adjacent two rows' rigidity CFG stake (4) is equal, often arranges rigidity
Between CFG stake (4), the spacing of adjacent row rigidity CFG stake (4) side by side is equal；Many
Between the flexible rotary churning pile (5) of row, the distance between adjacent two rows' flexibility rotary churning pile (5) is equal,
The often spacing phase of adjacent row flexibility rotary churning pile (5) side by side between the flexible rotary churning pile of row (5)
Deng.
6. road structure as claimed in claim 5, it is characterised in that adjacent two row's rigidity
Laterally aligned arrangement or horizontal between CFG stake (4), between adjacent two rows' flexibility rotary churning pile (5)
It is staggered.
7. road structure as claimed in claim 1, it is characterised in that described roadbed (1)
And it is provided with the string stress relief hole (8) along roadbed longitudinal direction between existing line (9), described
Stress relief hole (8) hole depth is with the degree of depth, spacing 3-4m at the bottom of flexible rotary churning pile (5) stake.
8. road structure as claimed in claim 1, it is characterised in that the flexible churning of each row
The toe that stake (5) closes on existing line (9) side at roadbed (1) is outer, to the most wired
Road (9) direction continues to arrange 1-2 root flexibility rotary churning pile (5), each row's rigidity CFG stake (4)
Outer, to away from existing line (9) away from the toe of existing line (9) side at roadbed (1)
Direction continues to arrange 1-2 root rigidity CFG stake (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620278186.1U CN205576637U (en) | 2016-04-06 | 2016-04-06 | Processing closes on roadbed structure of existing line soft soil foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620278186.1U CN205576637U (en) | 2016-04-06 | 2016-04-06 | Processing closes on roadbed structure of existing line soft soil foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205576637U true CN205576637U (en) | 2016-09-14 |
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ID=56865167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620278186.1U Active CN205576637U (en) | 2016-04-06 | 2016-04-06 | Processing closes on roadbed structure of existing line soft soil foundation |
Country Status (1)
| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696426A (en) * | 2016-04-06 | 2016-06-22 | 中铁第四勘察设计院集团有限公司 | Construction method for treating adjacent existing railway line soft soil foundation and roadbed structure thereof |
| CN111155368A (en) * | 2020-02-11 | 2020-05-15 | 中铁二院工程集团有限责任公司 | Reinforcing structure, roadbed assembly, roadbed system and construction method for high-speed railway |
| CN114763684A (en) * | 2021-01-11 | 2022-07-19 | 新疆北新路桥集团股份有限公司 | Method for building road on soft foundation and road built by method |
| CN114763685A (en) * | 2021-01-11 | 2022-07-19 | 新疆北新路桥集团股份有限公司 | Anti-deformation road structure |
-
2016
- 2016-04-06 CN CN201620278186.1U patent/CN205576637U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696426A (en) * | 2016-04-06 | 2016-06-22 | 中铁第四勘察设计院集团有限公司 | Construction method for treating adjacent existing railway line soft soil foundation and roadbed structure thereof |
| CN111155368A (en) * | 2020-02-11 | 2020-05-15 | 中铁二院工程集团有限责任公司 | Reinforcing structure, roadbed assembly, roadbed system and construction method for high-speed railway |
| CN114763684A (en) * | 2021-01-11 | 2022-07-19 | 新疆北新路桥集团股份有限公司 | Method for building road on soft foundation and road built by method |
| CN114763685A (en) * | 2021-01-11 | 2022-07-19 | 新疆北新路桥集团股份有限公司 | Anti-deformation road structure |
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