CN105970755A - Construction method for prevention and treatment for sidewise slippage of soft soil roadbed - Google Patents
Construction method for prevention and treatment for sidewise slippage of soft soil roadbed Download PDFInfo
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- CN105970755A CN105970755A CN201610369123.1A CN201610369123A CN105970755A CN 105970755 A CN105970755 A CN 105970755A CN 201610369123 A CN201610369123 A CN 201610369123A CN 105970755 A CN105970755 A CN 105970755A
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- soft soil
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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
The invention discloses a construction method for prevention and treatment for sidewise slippage of a soft soil roadbed. The core of the construction method is to control the integrity of the stressed deformation state of the roadbed and adopt transverse resistance piles. The key technology of the construction method is to control combination and integration of unevenly settled base plates or bars of the roadbed and transverse resistance pile foundations so as to establish a soft soil roadbed counterforce balance system. Compared with the prior art, the construction method for prevention and treatment for sidewise slippage of the soft soil roadbed has the main characteristics that the concept of establishing the soft soil roadbed counterforce balance system is proposed; the design on the soft soil roadbed is improved centering on control over the integrity of the stressed deformation state of the soft soil roadbed and establishing indexes including counter torque of the soft soil roadbed and the like; and the purpose of prevention and treatment for the sidewise slippage phenomenon of the soft soil roadbed is achieved.
Description
Technical field
The invention belongs to construction method field, be specifically related to the soft soil roadbed lateral sliding construction method of a kind of preventing and treating.
Background technology
Soft soil roadbed differential settlement phenomenon is more, particularly closes on the situation of waterside, limit, mountain soft soil foundation characteristic relative mistake, weak soil
Roadbed generation lateral sliding problem is the most prominent.And existing soft soil roadbed method for processing foundation and the method for analysis are also a lot, but become
The suitability of merit case is the most poor.Applicant studies discovery, and it is that two reasons easily ignored are at all: (1) roadbed is even
Continuous body and the essential difference of discrete bodies: discrete bodies can bear pressure, but is substantially not subject to pulling force, can not bear moment；
Continuum can bear pressure, pulling force and moment, and control roadbed force and deformation state globality can build opposing roadbed and laterally slide
The counter-force equilibrium system substrate moved；(2) soft soil roadbed ground weak soil has the feature such as macrovoid ratio, high-compressibility, easily draws
Feeling like jelly earth roadbed generation lateral sliding phenomenon, the countertorque building the anti-force balancing system of soft soil foundation is the most crucial.
The most existing soft soil roadbed lateral sliding analysis and processing method ignore the structure anti-force balancing system of soft soil foundation, particularly
Closing on the situation of waterside, limit, mountain soft soil foundation characteristic relative mistake, soft soil roadbed generation lateral sliding problem as shown in Figure 1 is the most prominent
It is not at all surprising to go out.
Summary of the invention
For solving the problems referred to above, the present invention proposes the soft soil roadbed lateral sliding construction method of a kind of preventing and treating.
The present invention is directed to two problems that existing soft soil roadbed analysis exists with processing method, the earth roadbed analysis theories of traditional soft is ignored
The anti-force balancing system of structure soft soil foundation, controls roadbed force and deformation state globality the most simply and to build soft soil foundation anti-
Moment, could resist soft soil roadbed lateral sliding.On the basis of summing up experience and thinking dialectically, around controlling soft soil roadbed being subject to
The indexs such as force deformation state globality and structure soft soil foundation countertorque improve Soft Soil Subgrade Design.The theoretical basis of the present invention is as follows:
Globality or have base plate soft soil roadbed, its equilibrium system and counter-force equilibrium system equation are as follows:
FG=FM (1.1)
MF=FM*e (1.2)
In formula: FGFor soft soil roadbed weight；FMSoft soil foundation counter-force for section to be calculated；MFWeak soil for section to be calculated
Subgrade reaction square；E be the soft soil foundation counter-force equilibrium system in section to be calculated theoretical counter-force away from.
Therefore, formula (1.1), (1.2) show to improve Soft Soil Subgrade Design method according to malformation control method for coordinating with Fig. 2,
Controlling soft soil roadbed force and deformation state globality in design and laterally resist stake, its key technology is to control settlement of subgrade
Base plate or sash and laterally resist the combination of pile foundation so that it is as an anti-force balancing system of unitary construction soft soil foundation, reach
Prevent and treat the purpose of soft soil roadbed lateral sliding phenomenon.And in existing construction method, the most do not design this anti-force balancing system.
For achieving the above object, the present invention specifically adopts the following technical scheme that
Prevent and treat soft soil roadbed lateral sliding construction method, when roadbed be limit, newly-built mountain soft soil roadbed time, step is as follows:
Limit, S101: qualitative analysis mountain yet to be built is soft soil roadbed arranges the scope laterally resisting stake, determine simultaneously roadbed base plate or sash and
Set the parameter laterally resisting pile foundation；
S102: manual sorting smooth soft soil foundation surface；
S103: lay the grains of sand or blotter on manual sorting smooth soft soil foundation surface；
S104: according to the qualitative analysis of S101, is set by design requirement in soft soil foundation and laterally resists pile foundation；
S105: cast-in-place or place prefabricated reinforced concrete base plate or frame above the grains of sand laid on soft soil foundation surface or blotter
Lattice, as the key-course of soft soil roadbed force and deformation state globality, and are combined with pile foundation entirety, are used for resisting soft soil roadbed side
To sliding；
When roadbed be newly-built waterside soft soil roadbed time, step is as follows:
S201: qualitative analysis waterside yet to be built is soft soil roadbed arranges the scope laterally resisting stake；Determine simultaneously roadbed base plate or sash and
Set the parameter laterally resisting pile foundation；
S202: manual sorting smooth soft soil foundation surface；
S203: lay the grains of sand or blotter on manual sorting smooth soft soil foundation surface；
S204: according to the qualitative analysis of S201, is set by design requirement in soft soil foundation and laterally resists pile foundation；
S205: above the grains of sand laid on soft soil foundation surface or blotter cast-in-place or place prefabricated reinforced concrete base plate or
Sash, as the key-course of soft soil roadbed force and deformation state globality, and is combined with pile foundation entirety, is used for resisting soft soil roadbed
Lateral sliding.
As preferably, in described S101, qualitative analysis standard is: the soft soil foundation degree of depth residing for the left and right sides of target roadbed
When differing by more than 1m, soft soil foundation moment of resistance is difficult to the lateral sliding caused more than soft soil roadbed left and right sides differential settlement
Moment, this section of roadbed must be arranged laterally resists stake, otherwise laterally resists stake without arranging.
As preferably, in described S201, qualitative analysis standard is: the side, waterside of target roadbed far from waterside distance less than 1m time,
Soft soil foundation moment of resistance is difficult to the lateral sliding moment caused more than soft soil roadbed left and right sides differential settlement, this section of roadbed palpus
Arrange and laterally resist stake, otherwise laterally resist stake without arranging.
As preferably, in described S103 and S203, the thickness of the grains of sand or blotter is 50cm.
As preferably, in described S104, laterally opposing pile foundation isReinforced concrete pile, laterally longitudinal rectangle 2 ×
10m arranges, pile foundation is punched Soft Soil Layer and entered supporting course.2 × 10m is disposed with beneficially standardized construction, and pile foundation enters supporting course energy
Build the countertorque resisting soft soil roadbed lateral sliding reliably.
As preferably, in described S204, laterally opposing pile foundation isFoam concrete is filled out in single wall screw corrugated tube, its
Technique is arranged for first filling foam concrete, quincunx 1.0 × 1.0m or 1.5 × 1.5m again with follow-up steel pipe press-in corrugated tube, stake
Base length 6～10m, foam concrete match ratio is foam grain: husky: cement: water: additive=20.0:260:380:160:
8.8 (its comprcssive strength 1.5MPa, unit weight 8.3kN/m3Water capacity weight 10kN/m3).First fill out again with follow-up steel pipe press-in corrugated tube
The technique building foam concrete can ensure that pile foundation construction quality, reduces foam concrete divergence loss；Foam concrete comprcssive strength
1.5MPa, unit weight 8.3kN/m3Water capacity weight 10kN/m3, the countertorque actively resisting soft soil roadbed lateral sliding can be built.
Compared with prior art, the present invention is mainly characterized by: propose to build the theory of the anti-force balancing system of soft soil foundation, around
Control soft soil roadbed force and deformation state globality and build the index improvement Soft Soil Subgrade Designs such as soft soil foundation countertorque, by reinforcing bar
Concrete floor or sash are combined with pile foundation entirety, are used for resisting soft soil roadbed lateral sliding, reach to prevent and treat soft soil roadbed generation side
To the purpose of sliding phenomenon.
Accompanying drawing explanation
Fig. 1 is soft soil roadbed lateral sliding phenomenon schematic diagram；
Fig. 2 is the countertorque Disposal Measures force analysis figure building the anti-force balancing system of soft soil foundation；
Fig. 3 is the base plate controlling limit, mountain soft soil roadbed lateral sliding of the present invention or sash and the structure chart laterally resisting stake；
Fig. 4 is the base plate controlling waterside soft soil roadbed lateral sliding of the present invention or sash and the structure chart laterally resisting stake.
Detailed description of the invention
With detailed description of the invention the present invention it is further elaborated below in conjunction with the accompanying drawings and illustrates.Each embodiment in the present invention
Technical characteristic, on the premise of not colliding with each other, all can carry out respective combination.
Prevent and treat soft soil roadbed lateral sliding construction method, the soft soil roadbed and soft soil roadbed employing in the waterside distinct methods for limit, newly-built mountain.
Limit, the most newly-built mountain is soft soil roadbed: (1) is according to the soft soil roadbed model arranging laterally opposing stake in limit, formula (1.2) qualitative analysis mountain
Enclose.Qualitative analysis standard is: when the soft soil foundation degree of depth residing for the left and right sides of target roadbed differs by more than 1m, soft soil foundation
Moment of resistance is difficult to more than soft soil roadbed lateral sliding moment, and this section of roadbed must be arranged laterally resists stake, otherwise without arranging laterally
Opposing stake.Determine roadbed base plate or sash by Soft Soil Subgrade Design specification again and laterally resist pile foundations parameter with setting, build opposing soft
The counter-force equilibrium system of earth roadbed lateral sliding；(2) manual sorting smooth soft soil foundation surface, notices that heavy-duty machinery arranges smooth
The operation of soft soil foundation surface is easily destroyed soft ground surface layer duricrust, can run counter to desire on the contrary；(3) at the smooth weak soil of manual sorting
Foundation surface lays the 50cm thickness grains of sand or blotter, as lower step procedures machinery bed course and soft soil foundation surface drainage layer；
(4) result analyzed according to step (1), is needing to set the soft soil foundation section of pile foundation, is setting by the design requirement of related specifications
Laterally resisting pile foundation, generally laterally opposing pile foundation isReinforced concrete pile, the most longitudinal rectangle 2 × 10m arranges,
Pile foundation is punched Soft Soil Layer and is entered supporting course, not only reinforcing soft ground but also build the passive resistance forming countertorque；(5) at weak soil
Foundation surface has been laid cast-in-place by the design requirement of related specifications above the 50cm thickness grains of sand or blotter or has placed precast reinforced mixed
Solidifying soil base plate or sash longitudinally, as the key-course of soft soil roadbed force and deformation state globality, resist pile foundation fixed knot with horizontal
Close the real counter-force equilibrium system being formed and resisting soft soil roadbed lateral sliding, reach to administer the purpose of soft soil roadbed lateral sliding phenomenon,
Concrete setting is as shown in Figure 3.(6) filling roadbed and do road surface by specification.
The most newly-built waterside is soft soil roadbed: (1) is according to the soft soil roadbed model arranging laterally opposing stake in formula (1.2) qualitative analysis waterside
Enclose；Qualitative analysis standard is: the side, waterside of the close water of target roadbed far from waterside distance less than 1m time, soft soil foundation resistance
Square is difficult to more than soft soil roadbed lateral sliding moment, and this section of roadbed must be arranged laterally resists stake, otherwise laterally resists stake without arranging.
Determine roadbed base plate or sash by Soft Soil Subgrade Design specification again and laterally resist pile foundation with setting, build and resist soft soil roadbed lateral cunning
The counter-force equilibrium system moved；(2) manual sorting smooth soft soil foundation surface, notices that heavy-duty machinery arranges smooth soft soil foundation surface
Operation is easily destroyed soft ground surface layer duricrust, can run counter to desire on the contrary；(3) lay on manual sorting smooth soft soil foundation surface
The 50cm thickness grains of sand or blotter, as lower step procedures machinery bed course and soft soil foundation surface drainage layer；(4) according to step
(1) needs, soft soil foundation is set by the design requirement of related specifications and laterally resists pile foundation, and generally laterally opposing pile foundation is
Filling out foam concrete in single wall screw corrugated tube, its technique fills foam concrete again for being first pressed into corrugated tube with follow-up steel pipe, prunus mume (sieb.) sieb.et zucc.
Flower-shape 1.0 × 1.0m or 1.5 × 1.5m arranges, pile foundation length 6～10m, and foam concrete match ratio is foam grain: husky: water
Mud: water: additive=20.0:260:380:160:8.8 (its comprcssive strength 1.5MPa, unit weight 8.3kN/m3Water capacity weight
10kN/m3), not only reinforcing soft ground but also build the active resistance forming countertorque；(5) 50cm has been laid on soft soil foundation surface
Or placement prefabricated reinforced concrete base plate cast-in-place by the design requirement of related specifications or sash above the thick grains of sand or blotter, as
The key-course of soft soil roadbed force and deformation state globality, really forms the soft soil roadbed side of opposing with laterally opposing pile foundation secure bond
To the counter-force equilibrium system of sliding, reaching to administer the purpose of soft soil roadbed lateral sliding phenomenon, concrete setting is as shown in Figure 4.(6)
Filling roadbed and do road surface by specification.
Embodiment described above is the one preferably scheme of the present invention, and so it is not intended to limiting the invention.Relevant technology is led
The those of ordinary skill in territory, without departing from the spirit and scope of the present invention, it is also possible to make a variety of changes and modification.
The technical scheme that the most all modes taking equivalent or equivalent transformation are obtained, all falls within protection scope of the present invention.
Claims (6)
1. prevent and treat soft soil roadbed lateral sliding construction method for one kind, it is characterised in that:
When roadbed be limit, newly-built mountain soft soil roadbed time, step is as follows:
Limit, S101: qualitative analysis mountain yet to be built is soft soil roadbed arranges the scope laterally resisting stake, determine simultaneously roadbed base plate or sash and
Set the parameter laterally resisting pile foundation；
S102: manual sorting smooth soft soil foundation surface；
S103: lay the grains of sand or blotter on manual sorting smooth soft soil foundation surface；
S104: according to the qualitative analysis of S101, is set by design requirement in soft soil foundation and laterally resists pile foundation；
S105: cast-in-place or place prefabricated reinforced concrete base plate or frame above the grains of sand laid on soft soil foundation surface or blotter
Lattice, as the key-course of soft soil roadbed force and deformation state globality, and are combined with pile foundation entirety, are used for resisting soft soil roadbed side
To sliding；
When roadbed be newly-built waterside soft soil roadbed time, step is as follows:
S201: qualitative analysis waterside yet to be built is soft soil roadbed arranges the scope laterally resisting stake；Determine simultaneously roadbed base plate or sash and
Set the parameter laterally resisting pile foundation；
S202: manual sorting smooth soft soil foundation surface；
S203: lay the grains of sand or blotter on manual sorting smooth soft soil foundation surface；
S204: according to the qualitative analysis of S201, is set by design requirement in soft soil foundation and laterally resists pile foundation；
S205: above the grains of sand laid on soft soil foundation surface or blotter cast-in-place or place prefabricated reinforced concrete base plate or
Sash longitudinally, as the key-course of soft soil roadbed force and deformation state globality, and is combined with pile foundation entirety, is used for resisting weak soil
Roadbed lateral sliding.
2. the soft soil roadbed lateral sliding construction method of preventing and treating as claimed in claim 1, it is characterised in that: in described S101,
Qualitative analysis standard is: when the soft soil foundation degree of depth residing for the left and right sides of target roadbed differs by more than 1m, and this section of roadbed must set
Put and laterally resist stake, otherwise laterally resist stake without arranging.
3. the soft soil roadbed lateral sliding construction method of preventing and treating as claimed in claim 1, it is characterised in that: in described S201,
Qualitative analysis standard is: the side, waterside of target roadbed far from waterside distance less than 1m time, this section of roadbed must be arranged laterally resists stake,
Otherwise laterally resist stake without arranging.
4. the soft soil roadbed lateral sliding construction method of preventing and treating as claimed in claim 1, it is characterised in that: described S103 and S203
In, the thickness of the grains of sand or blotter is 50cm.
5. the soft soil roadbed lateral sliding construction method of preventing and treating as claimed in claim 1, it is characterised in that: in described S104,
Laterally opposing pile foundation isReinforced concrete pile, the most longitudinal rectangle 2 × 10m arranges, pile foundation is punched Soft Soil Layer and entered
Supporting course.
6. the soft soil roadbed lateral sliding construction method of preventing and treating as claimed in claim 1, it is characterised in that: in described S204,
Laterally opposing pile foundation isFilling foam concrete in single wall screw corrugated tube, its technique is first with follow-up steel pipe press-in ripple
Pipe fills foam concrete, quincunx 1.0 × 1.0m or 1.5 × 1.5m again and arranges, pile foundation length 6～10m, foam concrete
Match ratio is foam grain: husky: cement: water: additive=20.0:260:380:160:8.8, and comprcssive strength 1.5Mpa is held
Weight 8.3kN/m3。
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| CN201610369123.1A CN105970755A (en) | 2016-05-27 | 2016-05-27 | Construction method for prevention and treatment for sidewise slippage of soft soil roadbed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN117436183A (en) * | 2023-12-21 | 2024-01-23 | 湖南大学 | Synchronous construction method for bridge, municipal road and adjacent service area in deep soft soil area |
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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 |
| CN117436183A (en) * | 2023-12-21 | 2024-01-23 | 湖南大学 | Synchronous construction method for bridge, municipal road and adjacent service area in deep soft soil area |
| CN117436183B (en) * | 2023-12-21 | 2024-03-05 | 湖南大学 | Synchronous construction method for bridge, municipal road and adjacent service area in deep soft soil area |
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