CN205576638U - Consolidate roadbed structure who handles newly -built railway karst foundation - Google Patents
Consolidate roadbed structure who handles newly -built railway karst foundation Download PDFInfo
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- CN205576638U CN205576638U CN201620278194.6U CN201620278194U CN205576638U CN 205576638 U CN205576638 U CN 205576638U CN 201620278194 U CN201620278194 U CN 201620278194U CN 205576638 U CN205576638 U CN 205576638U
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Abstract
The utility model discloses a consolidate roadbed structure who handles newly -built railway karst foundation, a serial communication port, including setting up at the plate -girder at weak soil layer top, laying the road bed at the plate -girder top, the plate -girder below is equipped with the fore -and -aft many gang drill hole bored concrete pile in way along the line, all pierce through weak soil layer, hard stratum to karst layer at the bottom of the stake of drilling bored concrete pile, drilling bored concrete pile pile bolck forms the stake plate structure with plate -girder bottom fixed connection, stake plate structure both sides karst foundation 's hard stratum is equipped with the fore -and -aft continuous slip casting in way along the line with the karst stacking department of closing and consolidates the district. The utility model discloses a roadbed structure consolidates karst foundation and upper portion soil property overburden, has improved the foundation bearing capacity, the effective control road bed post -construction settlement.
Description
Technical field
This utility model relates to Geotechnical Engineering field, newly-built in particular to a kind of consolidation process
The road structure of railway karst foundation.
Background technology
Karst is that the solublerock such as limestone, dolomite produces under the long-term corrosion of water
Raw various geological form, effect and phenomenon.Karst foundation deformation failure principal mode has
Foundation bearing capacity deficiency, differential settlement, concrete foundation slide, earth's surface cave in.And along with
Socioeconomic development, railway construction is increasingly faster, and increasing railway engineering is at rock
Molten area is launched, and the regularity and stability of road structure is directly connected to railway operation peace
Entirely, thus high-speed railway has extremely strict requirements to base stabilization and settlement Control.Cause
This builds high-speed railway on karst foundation, it is necessary to process karst foundation, takes
Effectively reinforcement measure controls the settlement after construction of roadbed, to ensure the long-term steady of track structure
Fixed.
At present, the treatment measures of karst foundation are mainly filled out pad method, slip casting method, high pressure
Churning method etc..Fill out pad method and be primarily adapted for use in bare karst and shallow embedding karst, and inapplicable
In covered karst, buried karst；Slip casting method is the most frequently used karst treatment method, but
The stability of karst foundation can only be ensured, and can not well control settlement after construction；High pressure
Churning method includes the experience of construction all to construction technology, the plant equipment of construction and material
There is very high request, and uneconomical, so non-large-scale promotion uses.
Therefore for overcoming above-mentioned many defects, it is necessary to provide one can not only ensure karst
Foundation stability, simultaneously also can effectively control settlement after construction, reasonable, economic consolidation process
The road structure of newly built railway karst foundation.
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
The road structure of consolidation process newly built railway karst foundation, carries out drill-pouring to karst foundation
Stake is reinforced and slip casing by pressure processes, and not only ensure that the steady in a long-term of karst foundation, the most effectively
Control settlement after construction, meet stability and the change of karst foundation high-speed railway subgrade simultaneously
The requirement that shape controls.
The technical solution of the utility model is: a kind of consolidation process newly built railway karst foundation
Road structure, it is characterised in that include being arranged on the plate-girder at Soft Soil Layer top, being laid on plate
The roadbed in back portion, is provided with the multiple rows of cast-in-situ bored pile along circuit longitudinal direction below described plate-girder,
All penetrating Soft Soil Layer, hard stratum to karst layer at the bottom of described Pile, described boring fills
Note stake stake top is fixedly connected to form pile slab structure, described pile slab structure both sides rock bottom plate-girder
The continuous grouting that the hard stratum of molten ground and karst layer junction are provided with along circuit is longitudinal is reinforced
District.
Preferably, described cast-in-situ bored pile, plate-girder pour with employing armored concrete and form,
Described Pile top extends upwardly into bottom plate-girder 10-15cm and cast-in-situ bored pile and plate
The steel bar stress welding colligation of beam.
Preferably, in described multiple rows of cast-in-situ bored pile between adjacent two row hole drilling bored concrete piles away from
From equal, for 4-5m；Adjacent two cast-in-situ bored piles side by side in described every row hole drilling bored concrete pile
Between distance equal, for 4-5m.
Preferably, described Pile footpath is equal, for 1.0-1.5m.
Preferably, described plate-girder along circuit longitudinally disposed time, pre-between longitudinally adjacent two boards beam
Leave expansion joint, in described expansion joint, be packed with Colophonium hemp cut.
Preferably, described plate-girder along circuit laterally by the small-sized plate-girder of polylith with central lines of track pair
Title is formed by connecting.
Preferably, described grouting and reinforcing district thickness model in the above hard stratum of interface of stone and earth
Enclosing for 3-5m, in interface of stone and earth following karst layer, thickness is in the range of 6-7m, described
The total thickness in grouting and reinforcing district is 9-12m.
Preferably, in described grouting and reinforcing district, injected hole presses equilateral triangle or quadrate array cloth
Put, injected hole pitch of holes 5-6m.
Preferably, the reinforcing scope in pile slab structure both sides grouting and reinforcing district is from flushing in same side plate
Beam lateral ends rises, and the reinforcing scope in grouting and reinforcing district, embankment location is along circuit the most extremely
The outer 5.0m of embankment toe, the reinforcing scope in grouting and reinforcing district, cutting location is along circuit laterally outward
To lateral sulcus platform outward flange.
Principle of the present utility model is:
The Deep Thick Soft Ground of base table layer uses cast-in-situ bored pile to carry out basement process, stake the most over the ground
Long Soft Soil Layer, the hard stratum to karst layer of penetrating, is formed and has globality, water stability and certain
The composite foundation of intensity, thus improve foundation bearing capacity, reduce uneven settlement of foundation and work
Rear sedimentation, reaches the purpose of reinforcement of soft soil ground.Then, to the rock under deep soft soil foundation
Molten interface of stone and earth uses grouting and reinforcing, has reached the process to Deep Thick Soft Ground karst foundation,
Ensure long-time stability and the settlement request of roadbed.
The beneficial effects of the utility model are:
By pile slab structure, karst foundation and top soil property cover layer are reinforced, improved
Foundation bearing capacity, effectively controls post-construction settlement of subgrade；It is filled with rock by slip casing by pressure
Molten crack, solution cavity, plug groundwater activities space, forms water barrier, thus prevents
The karst collapse caused because of groundwater level fluctuation, it is ensured that karst foundation steady in a long-term
Property.And this foundation reinforcing structure form uncomplicated, economical rationality, can extensively apply from now on
In high-speed railway karst foundation is reinforced.
Accompanying drawing explanation
Fig. 1 is this utility model along the horizontal structural representation of circuit
Fig. 2 is that this utility model injected hole equilateral triangle arrangement arranges schematic diagram
Fig. 3 is that this utility model injected hole square arrangement arranges schematic diagram
Wherein: 1. roadbed 2. Soft Soil Layer 3. hard stratum 4. karst layer 5. interface of stone and earth 6. note
Slurry stabilization zone 7. cast-in-situ bored pile 8. plate-girder 9. injected hole.
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 provides a kind of consolidation process newly built railway karst foundation
Road structure, the karst foundation structure at place includes karst layer 4, is positioned on karst layer 4
Side hard stratum 3, be positioned at the Soft Soil Layer 2 above hard stratum 3, road structure include arrange
Plate-girder 8 at Soft Soil Layer 2 top, it is laid on the roadbed 1 at plate-girder 8 top, plate-girder 8 edge
Circuit is longitudinally and with the lateral symmetry setting of central lines of track, and central lines of track is roadbed center
Line, plate-girder 8 transverse ends lays respectively between curb and the toe of roadbed 1 homonymy (such as plate
The left side lateral ends of beam 8 is positioned between the curb on the left of roadbed 1 and toe, the right side of plate-girder 8
Side lateral ends is in like manner).Soft Soil Layer 2 bottom plate-girder 8 is provided with along circuit longitudinal many
Row hole drilling bored concrete pile 7, all penetrate at the bottom of cast-in-situ bored pile 7 Soft Soil Layer 2, hard stratum 3 to
Karst layer 4, cast-in-situ bored pile 7 top is fixedly connected to form pile slab structure bottom plate-girder 8,
Hard stratum 3 and karst layer 4 junction of pile slab structure both sides karst foundation are provided with indulges along circuit
To continuous grouting stabilization zone 6.It is horizontal that central lines of track in this utility model refers to circuit
Kernel of section line.
Cast-in-situ bored pile 7, plate-girder 8 pour with employing armored concrete and form, drill-pouring
7 tops of stake extend upwardly into bottom plate-girder 8 10-15cm and cast-in-situ bored pile 7 and plate-girder 8
Steel bar stress welding colligation.7 footpaths of cast-in-situ bored pile are equal, and diameter d is 1-1.5m, stake
Space D is 4-5m, effective length 18-22m, depending on visual on-the-spot Exploring Cavern situation,
And meet sedimentation inspection calculation requirement.Plate-girder 8 in the present embodiment is laterally by thick 1-1.2m, laterally
A size of 14m, longitudinal size is that two blocks of small-sized plate-girders of 7.2m connect formation, along circuit
The expansion joint of wide 2cm is stayed, filling Colophonium fiber crops in seam between longitudinally adjacent two blocks of small-sized plate-girders
Muscle, expansion joint position is preferably located at the centre position of two campsheds.Phase in multiple rows of cast-in-situ bored pile 7
Distance between adjacent two row hole drilling bored concrete piles 7 is equal, for 4-5m, every row hole drilling bored concrete pile 7
In distance between adjacent cast-in-situ bored pile 7 equal, for 4-5m.The present embodiment is adjacent with row
Cast-in-situ bored pile 7 pile spacing 5.0m, spacing 4.0m of adjacent row cast-in-situ bored pile 7, i.e.
The horizontal 5.0m of pile spacing, longitudinal 4.0m.
The grouting and reinforcing district 6 thickness range in interface of stone and earth more than 5 hard stratum 3 is
3-5m, in interface of stone and earth less than 5 karst layer 4, thickness is in the range of 6-7m, slip casting
The total thickness of stabilization zone 6 is 9-12m.In grouting and reinforcing district 6, injected hole 9 is by positive three
Dihedral or arranged in squares as Figure 2-3, injected hole 9 pitch of holes 5-6m.Plate-girder both sides
The reinforcing scope in grouting and reinforcing district 6 from flushing in homonymy plate-girder 8 lateral ends along circuit
Laterally outward extending (away from line direction), this structure is suitable for and embankment location and road simultaneously
Moat location: when for embankment location, the reinforcing scope in grouting and reinforcing district 6 along circuit laterally to
Outward to the outer 5.0m of embankment toe, when for cutting location, the reinforcing scope in grouting and reinforcing district 6
Along circuit laterally outward to lateral sulcus platform outward flange.
The road structure Specific construction process of above-mentioned consolidation process karst foundation is:
A. use armored concrete cast in situs along multiple rows of cast-in-situ bored pile 7 of circuit longitudinal direction, bore
Hole pouring pile 7 pile body typically uses C35 armored concrete cast in situs, has once irrigated,
Must not stop over.With arranging adjacent cast-in-situ bored pile 7 pile spacing 5.0m, adjacent row boring fills
Spacing 4.0m of note stake 7, i.e. the horizontal 5.0m of pile spacing, longitudinal 4.0m.Cast-in-situ bored pile
7 footpaths are equal, for 1.0-1.5m, effective length 18-22m (the present embodiment preferred stake footpath 1.2m,
Effective length 20m), as met solution cavity, cast-in-situ bored pile 7 should enter rock stratum through solution cavity
No less than 2m, and stake bed rock layer thickness is not less than 3m, concrete visual on-the-spot Exploring Cavern feelings
Depending on condition, and to meet sedimentation inspection calculation requirement.Above cast-in-situ bored pile 7, Soft Soil Layer 2 pushes up
The plate-girder 8 of C35 armored concrete is longitudinally laid in portion along circuit, and plate-girder 8 is with central lines of track
Lateral symmetry setting, cast-in-situ bored pile 7 pile body stretches into 10-15cm (this enforcement in plate-girder 8
The preferred 15cm of example) and cast-in-situ bored pile 7 weld colligation with the steel bar stress of plate-girder 8, adopt
With the formation pile slab structure that is rigidly connected.Plate-girder 8 laterally directly laid by a monoblock along circuit or
The small-sized plate-girder of polylith is formed by connecting with central lines of track symmetry, and the plate-girder 8 in the present embodiment is horizontal
To by thick 1-1.2m, lateral dimension is 14m, and longitudinal size is two pieces of compact board of 7.2m
Beam connects formation, stays stretching of wide 2cm between the longitudinally adjacent two blocks of small-sized plate-girders of circuit
Seam, filling Colophonium hemp cut in seam, expansion joint position is preferably located at the centre position of two campsheds.
B. pile slab structure both sides karst foundation uses slip casing by pressure to reinforce, to interface of stone and earth 5
Carry out sealing treatment, form grouting and reinforcing district 6 (water barrier).Grouting and reinforcing district 6 gross thickness
Not less than 9m, wherein in interface of stone and earth more than 5 hard stratum 3, thickness is not less than 3m, with
Not less than 6m in lower karst layer 4.Grouting and reinforcing district 6, is filled with Karst Fissures, solution cavity,
Plug groundwater activities space, it is possible to prevent because groundwater level fluctuation causes karst collapse.
Injected hole 9 equilateral triangle or arranged in squares as Figure 2-3 (in Fig. 2-3 left and right to for
Along circuit longitudinally, upward and downward is horizontal along circuit), (the present embodiment is preferred for pitch of holes 5-6m
5.0m), from flushing in homonymy plate-girder 8 lateral ends, embankment location reinforcing scope is to setting
About 5.0m outside the roadbed 1 embankment toe of meter, outside cutting location reinforcing scope to lateral sulcus platform
Edge.The grouting and reinforcing degree of depth discloses karsts developing area situation according to guide's exploratory hole, and general reinforcing is deep
Degree for interface of stone and earth less than 5 6m, as in the range of 6m Karst roof rock crushing or
Meet solution cavity and karst when growing very much, slip casting thickness should be strengthened, should to below solution cavity base plate not
Less than 1m；Slip casting sleeve pipe embeds basement rock 0.5m, is consolidated into one by cement mortar.Slip casting
When hole runs into empty or bigger crack, medium coarse sand material etc. is used to be backfilled to depending on concrete condition molten
Slip casting just can be carried out after the filling of hole.Slip casting terminates grouting port and uses C15 concrete backfill in time
Close.
C. plate-girder 8 top is by design roadbed paving 1, and plate-girder 8 transverse ends lays respectively at homonymy
Between curb and the toe of roadbed 1.
In sum, by pile slab structure, karst foundation and top soil property cover layer are carried out
Reinforce, improve foundation bearing capacity, effectively control post-construction settlement of subgrade；Noted by pressure
Slurry is filled with Karst Fissures, solution cavity, plugs groundwater activities space, forms water barrier,
Thus prevent the karst collapse caused because of groundwater level fluctuation, it is ensured that karst foundation
Long-time stability.And this foundation reinforcing structure and form of construction work uncomplicated, economical rationality,
Can be widely applied to from now in the reinforcing of high-speed railway karst foundation.
Claims (9)
1. the road structure of a consolidation process newly built railway karst foundation, it is characterised in that
Including being arranged on the plate-girder (8) at Soft Soil Layer (2) top, being laid on plate-girder (8) top
Roadbed (1), described plate-girder (8) lower section is provided with the multiple rows of cast-in-situ bored pile along circuit longitudinal direction
(7), Soft Soil Layer (2), hard stratum (3) are all penetrated at the bottom of described cast-in-situ bored pile (7) stake
To karst layer (4), described cast-in-situ bored pile (7) stake top is fixing with plate-girder (8) bottom even
Connect formation pile slab structure, the hard stratum (3) of described pile slab structure both sides karst foundation and rock
Soluble layer (4) junction is provided with the continuous grouting stabilization zone (6) along circuit longitudinal direction.
2. road structure as claimed in claim 1, it is characterised in that described drill-pouring
Stake (7), plate-girder (8) pour with employing armored concrete and form, described cast-in-situ bored pile
(7) stake top extend upwardly into plate-girder (8) bottom 10-15cm and cast-in-situ bored pile (7) with
The steel bar stress welding colligation of plate-girder (8).
3. road structure as claimed in claim 1, it is characterised in that multiple rows of described boring
In bored concrete pile (7), the distance between adjacent two row hole drilling bored concrete piles (7) is equal, for 4-5m；
Often arrange in described cast-in-situ bored pile (7) between adjacent two cast-in-situ bored piles (7) side by side
Apart from equal, for 4-5m.
4. road structure as claimed in claim 1, it is characterised in that described drill-pouring
Stake (7) stake footpath is equal, for 1.0-1.5m, effective length 18-22m.
5. road structure as claimed in claim 1, it is characterised in that described plate-girder (8)
Along circuit longitudinally disposed time, be reserved with expansion joint between longitudinally adjacent two boards beam (8), institute
Colophonium hemp cut it is packed with in stating expansion joint.
6. road structure as claimed in claim 1, it is characterised in that described plate-girder (8)
Laterally it is formed by connecting with central lines of track symmetry by the small-sized plate-girder of polylith along circuit.
7. road structure as claimed in claim 1, it is characterised in that described grouting and reinforcing
The district (6) thickness range in interface of stone and earth (5) above hard stratum (3) is 3-5m,
In interface of stone and earth (5) following karst layer (4), thickness is in the range of 6-7m, described note
The total thickness of slurry stabilization zone (6) is 9-12m.
8. road structure as claimed in claim 1, it is characterised in that described grouting and reinforcing
In district (6), injected hole (9) is to arrange by equilateral triangle or quadrate array, injected hole (9)
Pitch of holes 5-6m.
9. road structure as claimed in claim 1, it is characterised in that pile slab structure both sides
The reinforcing scope in grouting and reinforcing district (6) from flushing in homonymy plate-girder (8) lateral ends,
The reinforcing scope in grouting and reinforcing district, embankment location (6) along circuit laterally outward to embankment toe
Outer 5.0m, the reinforcing scope in grouting and reinforcing district, cutting location (6) is along circuit the most extremely
Lateral sulcus platform outward flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620278194.6U CN205576638U (en) | 2016-04-06 | 2016-04-06 | Consolidate roadbed structure who handles newly -built railway karst foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620278194.6U CN205576638U (en) | 2016-04-06 | 2016-04-06 | Consolidate roadbed structure who handles newly -built railway karst foundation |
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| CN205576638U true CN205576638U (en) | 2016-09-14 |
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| CN201620278194.6U Active CN205576638U (en) | 2016-04-06 | 2016-04-06 | Consolidate roadbed structure who handles newly -built railway karst foundation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696427A (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 reinforcing newly-built railway karst foundation and roadbed structure thereof |
| CN106638168A (en) * | 2017-01-17 | 2017-05-10 | 马鞍山钢铁股份有限公司 | Device for treating metallurgy railroad bed defects through reinforcing and grouting and construction method |
-
2016
- 2016-04-06 CN CN201620278194.6U patent/CN205576638U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696427A (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 reinforcing newly-built railway karst foundation and roadbed structure thereof |
| CN105696427B (en) * | 2016-04-06 | 2017-11-03 | 中铁第四勘察设计院集团有限公司 | The construction method and its road structure of a kind of consolidation process newly built railway karst foundation |
| CN106638168A (en) * | 2017-01-17 | 2017-05-10 | 马鞍山钢铁股份有限公司 | Device for treating metallurgy railroad bed defects through reinforcing and grouting and construction method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180403 Address after: 430063 Wuchang, Hubei, Yang Park, Peace Avenue, No. 745 Patentee after: In the fourth group of geotechnical engineering limited liability company Address before: 430063 Wuchang, Hubei, Yang Park, Peace Avenue, No. 745 Patentee before: The forth Survey and Design Institute (Group) Co., Ltd. Of CRCC |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee after: China Railway Siyuan Group Engineering Construction Co., Ltd Address before: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee before: GEOTECHNICAL ENGINEERING CO., LTD. OF CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |