CN104532713A - Roadbed subsidence repairing device and method - Google Patents
Roadbed subsidence repairing device and method Download PDFInfo
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- CN104532713A CN104532713A CN201410842305.7A CN201410842305A CN104532713A CN 104532713 A CN104532713 A CN 104532713A CN 201410842305 A CN201410842305 A CN 201410842305A CN 104532713 A CN104532713 A CN 104532713A
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
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Abstract
The invention belongs to the technical field of roadbed repair, and discloses a roadbed subsidence repairing device and method. The repairing device comprises a steel arch, mini piles, a concrete abutment body, a steel shim, filled concrete and grouting pipes. The load of a roadbed subsidence section can be transmitted to a non-subsidence roadbed area with larger strength, the non-subsidence roadbed area surrounds the roadbed subsidence section, and the non-subsidence roadbed area does not subside; a certain compaction function to a weak roadbed can be achieved through high-pressure grouting, the deformation resistance of the roadbed is improved through filling of gaps and cracks of the surface layer of the weak roadbed, and the further subsidence of the weak roadbed can be effectively controlled. Meanwhile, the situation that surface rainfall is immersed in a roadbed channel is interdicted through filling of the concrete and the grouting body, and the roadbed is prevented from being immersed in water, softened and disengaged again. The roadbed subsidence repairing device and method have the advantages that the subsidence treatment of the roadbed is achieved, the technology is simple, the quality can be controlled, the construction progress is fast, the roadbed subsidence problem caused by reduction of the strength of the roadbed is basically eliminated, and the service life of the highway road surface structure is prolonged.
Description
Technical field
The present invention relates to field of civil engineering, relate to a kind of road foundation depression prosthetic device and restorative procedure.
Background technology
Roadbed is as the basis of road structure and support, the military service behavior of its top road structure is played a key effect, but particularly Canal in Loess Area high-filled embankment is more in mountain area, due to the impact of construction problem and various factor of natural environment, roadbed settlement disease occurs often, and causing road structure damage layer, planeness reduces, and normal operation and the people's lives and property safety of highway in serious threat.
Roadbed settlement Treatment Methods conventional at present has sand compaction pile (broken stone pile) method, deep mixing method (comprising powder whitewashing spray) and slip casting method etc., these methods or complex process, cost is higher, construction period is long, larger mechanical execution platform is needed during process, and need closed whole section, affect highway communication; Or construction quality is wayward, punishment effect is undesirable, and environmental pollution is larger.These methods all cannot meet that highroad maintenance is efficient, high-quality, economy, environmental protection technical requirements.
Summary of the invention
The object of the invention is to solve undesirable to the punishment effect of roadbed settlement in prior art, cost is higher and various technical indicator does not reach the technical problem of requirement, and then provides road foundation depression prosthetic device and restorative procedure that the effective and repairing quality of a kind of punishment to roadbed settlement is easy to control.
For achieving the above object, the present invention adopts following technical scheme:
A kind of road foundation depression prosthetic device, is characterized in that: described road foundation depression prosthetic device comprises connector, walk abreast with trend of road the steel arch-shelf arranged and the mini pile group being arranged on steel arch-shelf two ends; Described connector comprises concrete bed, the billet be embedded in concrete bed; Describedly be arranged on the mini pile group that steel arch-shelf often holds and include the first mini pile and the second mini pile, one end of described first mini pile and the second mini pile stretches into the non-depression section along trend of road respectively, and the other end is connected with steel arch-shelf by concrete bed and billet successively.
As preferably, the non-depression section along trend of road is stretched into horizontal by 45 ° and 60 ° respectively in one end of the first mini pile of the present invention and the second mini pile.
As preferably, the stake footpath of the first mini pile of the present invention and the second mini pile is all not less than 150mm, the pile body of described first mini pile and the second mini pile all adopts C25 concreting, the stake of described first mini pile and the second mini pile is long is all not less than 3000mm, and pile center's spacing of described first mini pile and the second mini pile is the stake footpath of 4 ~ 6 times of first mini pile or the second mini pile.
As preferably, steel arch-shelf entirety of the present invention is in circular curve shape; Described circular curve is determined according to road foundation depression segment length, and the camber that described circular curve raises up is 1/100L ~ 1/50L; Wherein, L is road foundation depression segment length, and the unit of L is m.
As preferably, steel arch-shelf of the present invention is I20b shaped steel; Described steel arch-shelf one saves or more piece; When described steel arch-shelf is more piece, described more piece steel arch-shelf adopts the entirety of the mutual assembled formation one of M30 bolt in circular curve shape.
As preferably, road foundation depression prosthetic device of the present invention also comprises the slip casting pipe pile being arranged on road depression Duan Bingyu steel arch-shelf and being connected; Described slip casting pipe pile comprises the Grouting Pipe stretching into road depression section, and Grouting Pipe top is provided with concrete bed and is embedded in the billet on concrete bed; Described steel arch-shelf is connected with Grouting Pipe by billet and concrete bed successively.
As preferably, steel arch-shelf of the present invention adopts the mode of double welding to weld with billet; Described welding and assembling height is not less than 6mm;
As preferably, the concrete that concrete bed of the present invention adopts is C30 concrete; The degree of depth that described billet embeds concrete bed is not less than 5mm, and the size of described billet is not less than 250 × 230 × 15mm.
As preferably, road foundation depression prosthetic device of the present invention also comprises the fill concrete layer around being cast in around steel arch-shelf.
A road foundation depression restorative procedure for basis road foundation depression as above prosthetic device, is characterized in that: said method comprising the steps of:
A) remove depression road surface structare layer in road foundation depression section, and excavate roadbed to designated depth according to steel arch-shelf camber and protective layer thickness; Described steel arch-shelf camber is 1/100 ~ 1/50 of road foundation depression section;
B) the staggered mini pile squeezed into horizontal by 45 ° and 60 ° in the non-depression section of road foundation, the spacing of described mini pile is the stake footpath of 4 ~ 6 times of first mini pile or the second mini pile, and the stake of described mini pile is long is not less than 3000mm;
C) adopt C30 concreting concrete bed at the pile crown place of mini pile, and billet is embedded in concrete bed; The degree of depth that described billet embeds concrete bed is not less than 5mm; The size of described billet is not less than 250 × 230 × 15mm;
D) be welded on billet by the two ends of the steel arch-shelf containing camber respectively by the mode of double welding, welding and assembling height is not less than 6mm, and weld seam needs full;
E) after excavating roadbed top layer removing foreign material and surface dust, in excavation roadbed top layer one or more Grouting Pipe pre-buried, Grouting Pipe direction keeps vertical with steel arch-shelf at projecting direction, and the spacing of described Grouting Pipe is not less than 3000mm, and described injected hole stretches in depression section;
F) C30 concrete and roadbed either flush is built in road foundation depression section, and vibration compacting, form fill concrete layer;
G) layer of concrete to be filled solidifies the backward Grouting Pipe be embedded in depression section and carries out shallow-layer high-pressure slip-casting, and grouting serous fluid adopts high strength and no shrinting cementation material, and initial grouting pressure controls at 0.5 ~ 1.0MPa, stops grouting pressure and is not less than 2.0Mpa;
H) surfacing deck on fill concrete layer.
The invention provides a kind of road foundation depression prosthetic device and restorative procedure, the load of roadbed settlement section can be passed to the larger non-depression roadbed region of ambient intensity by steel arch-shelf " arching " and mini pile by this road foundation depression prosthetic device and restorative procedure thereof, high-pressure slip-casting then plays certain compaction to weak subgrade, and fill space, top layer and the crack of weak subgrade, improve roadbed non-deformability, effectively can control the depression of weak subgrade.Simultaneously fill concrete and injecting cement paste have blocked the passage that surface precipitation immerses roadbed, avoid roadbed inundated intenerating and coming to nothing again.Therefore, when the present invention is applied to the depression punishment of road foundation, technique is simple, quality controllable, construction speed is fast, to highway communication and ambient influnence little, substantially can eliminate because subgrade strength reduces the roadbed settlement disease caused, improve Highway Pavement Structures application life; Its restorative procedure is reasonable in design, and technique is simple, and the construction period is short, and quality is easy to control.Specifically, the present invention has the following advantages:
1, the load of roadbed settlement section can be passed to the larger non-depression roadbed region of ambient intensity by " arching " of steel arch-shelf and mini pile by deck gravity load of the present invention and vehicular load, effectively reduces road surface structare layer deadweight and vehicular load that weak subgrade bears;
2, the present invention adopts shallow-layer high-pressure slip-casting, slip casting termination pressure is not less than 2.0MPa, high-pressure slip-casting plays certain compaction to weak subgrade end face, weak subgrade compactness improves, non-deformability is just corresponding enhancing also, improve the non-deformability of roadbed, obvious to the restriction of weak subgrade depression;
3, fill concrete of the present invention not only can bear fractional load, sealing function is played to road bed simultaneously, shallow-layer high-pressure slip-casting also can close the immersion passage on weak subgrade top layer, the two acting in conjunction can effectively avoid surface precipitation to immerse roadbed, effectively prevent surface precipitation and immerse roadbed to the impact of its intensity, avoid roadbed depression again;
4, the reparation of ordinary highway weak subgrade or adopt vertical reinforcement increase subgrade stiffness, or adopt deep layer slip casting method, both need boring, the former also will add reinforcement material and adopt the measures such as vibration, compacting to ensure reinforcement intensity in hole, latter uncontrollable slip casting Liquid Penetrant direction, quality is wayward, and can produce the pollution such as noise, discarded slurries; The present invention only needs shallow-layer to excavate, and squeeze into some mini piles, fill concrete just can be constructed after reaching requirement of strength road surface structare layer, and technique is simple, and the construction period is short, and quality is easy to control, roadbed settlement problem after process can be eliminated substantially, effectively avoids disease secondary to occur, and reduces the impact of roadbed reparation on highway communication and environment, reduce maintenance of highway pavement cost, improve service life of road surface.
Accompanying drawing explanation
Fig. 1 is the using state reference diagram of road foundation depression prosthetic device provided by the present invention;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is steel arch-shelf anchor bolts schematic diagram of the present invention;
Fig. 4 is the lateral view of Fig. 3;
Fig. 5 is the structural representation of Grouting Pipe of the present invention;
Fig. 6 is concrete bed structural representation of the present invention;
Fig. 7 is the plan structure schematic diagram of Fig. 6;
Fig. 8 is the force-transmission mechanism schematic diagram before adopting restorative procedure provided by the present invention;
Fig. 9 is the force-transmission mechanism schematic diagram after adopting restorative procedure provided by the present invention;
Wherein:
1-steel arch-shelf; 2-mini pile; 3-concrete bed; 4-billet; 5-fill concrete; 6-Grouting Pipe; 7-depression section roadbed; 8-non-depression section roadbed.
Detailed description of the invention
See Fig. 1 and Fig. 2, the invention provides a kind of road foundation depression prosthetic device, this road foundation depression prosthetic device comprises connector, walk abreast with trend of road the steel arch-shelf arranged and the mini pile group being arranged on steel arch-shelf two ends; Connector comprises concrete bed, the billet be embedded in concrete bed; Be arranged on the mini pile group that steel arch-shelf often holds and include the first mini pile and the second mini pile, one end of first mini pile and the second mini pile stretches into the non-depression section along trend of road respectively, and the other end is connected with steel arch-shelf by concrete bed and billet successively.Steel arch-shelf moves towards direction along highway and arranges, according to road shape can suitably be adjusted to highway at an angle, but can not crosscut highway, otherwise road surface structare layer and vehicular load are along highway lateral transport, because roadbed side is without any fixed constraint, additionally highway subgrade lateral deformation will be caused to increase, subgrade settlement also can correspondingly increase.
The non-depression section along trend of road is stretched into horizontal by 45 ° and 60 ° respectively in one end of first mini pile and the second mini pile.
The stake footpath of the first mini pile and the second mini pile is all not less than 150mm, the pile body of the first mini pile and the second mini pile all adopts C25 concreting, the stake of the first mini pile and the second mini pile is long is all not less than 3000mm, and pile center's spacing of the first mini pile and the second mini pile is the stake footpath of 4 ~ 6 times of first mini pile or the second mini pile.
Steel arch-shelf entirety is in circular curve shape; Circular curve is determined according to road foundation depression segment length, and the camber that circular curve raises up is 1/100L ~ 1/50L; Wherein, L is road foundation depression segment length, and the unit of L is m.Roadbed settlement is large, and camber then adopts higher value.
Steel arch-shelf is I20b shaped steel; Steel arch-shelf one saves or more piece; When steel arch-shelf is more piece, more piece steel arch-shelf adopts the entirety (see Fig. 3 and Fig. 4) of the mutual assembled formation one of M30 bolt in circular curve shape.I20b shaped steel is a kind of model of i iron, and its intensity meets load delivery request, when depression segment length is excessive, suitably can adopt more large scale model i iron under the prerequisite considering its economy, ensure load transmission effect.
Road foundation depression prosthetic device also comprises the slip casting pipe pile being arranged on road depression Duan Bingyu steel arch-shelf and being connected; Slip casting pipe pile comprises the Grouting Pipe (see Fig. 1, Fig. 2, Fig. 5 and Fig. 6) of the such as φ 32 stretching into road depression section, Grouting Pipe leaves φ 6 injected hole, eyelet interlaced arrangement, and when burying Grouting Pipe underground, Open Side Down for injected hole.Grouting Pipe top is provided with concrete bed and is embedded in the billet on concrete bed; Steel arch-shelf is connected with Grouting Pipe by billet and concrete bed successively.
Steel arch-shelf adopts the mode of double welding to weld with billet; Welding and assembling height is not less than 6mm;
See Fig. 6 and Fig. 7, the concrete that concrete bed adopts is C30 concrete; The degree of depth that billet embeds concrete bed is not less than 5mm, and the size of billet is not less than 250 × 230 × 15mm.
Road foundation depression prosthetic device also comprises the fill concrete layer around being cast in around steel arch-shelf.
At same road direction, many parallel steel arch-shelf can be adopted to realize the object supported together, steel arch-shelf horizontal spacing 1000mm, and assembled employing M30 bolt connects.
The present invention is while providing road foundation depression prosthetic device, and additionally provide a kind of road foundation depression restorative procedure, the method comprises the following steps:
A) remove depression road surface structare layer in road foundation depression section, and excavate roadbed to designated depth according to steel arch-shelf camber and protective layer thickness; Steel arch-shelf camber is 1/100 ~ 1/50 of road foundation depression section; Cutting depth is according to steel arch-shelf Application in Pre-camber, and namely steel arch-shelf camber adds certain thickness of protection tier;
B) the staggered mini pile squeezed into horizontal by 45 ° and 60 ° in the non-depression section of road foundation, the spacing of mini pile is the stake footpath of 4 ~ 6 times of first mini pile or the second mini pile, and the stake of mini pile is long is not less than 3000mm; Due to steel arch-shelf performance is " arching ", after the vertical loads such as deck deadweight and vehicle are delivered to base by steel arch-shelf, its direction of transfer has become horizontal by certain angle, according to what bear horizontal loading pile body, requirement is set, mini pile is set as 45 °-60 ° staggered are squeezed into, and better can play the carrying effect of pile body; By miniature pile construction engineering method, pile crown should crop out certain length, and concreting base, and billet is embedding with concrete bottom seating face; The stake of mini pile is long should meet requirement for bearing capacity, and consider that vehicle on highway load is comparatively large, its length should not be less than 3m, when depression segment length is excessive, can suitably increase stake long under the prerequisite considering its economy; The general built-in reinforcing cage of mini pile, reinforcing cage adopts some longitudinal reinforcements to make, and is spaced in intervals setting one stirrup;
C) adopt C30 concreting concrete bed at the pile crown place of mini pile, and billet is embedded in concrete bed; The degree of depth that billet embeds concrete bed is not less than 5mm; The size of billet is not less than 250 × 230 × 15mm;
D) be welded on billet by the two ends of the steel arch-shelf containing camber respectively by the mode of double welding, welding and assembling height is not less than 6mm, and weld seam needs full;
E) after excavating roadbed top layer removing foreign material and surface dust, in excavation roadbed top layer one or more Grouting Pipe pre-buried (according to the regulation of liquid silicification single in " building foundation treatment technical specification " and soda solution grouting, when damp sink of foundation is more serious, desirable 0.7 ~ the 0.9m of pitch-row, when damp sink of foundation is lighter, pitch-row suitably can increase to 1.2 ~ 2.5m, what adopt due to this patent is shallow-layer high-pressure slip-casting, just play the effect of its ground top layer densification and closed immersion passage, therefore its spacing also can suitably increase) Grouting Pipe direction keeps vertical with steel arch-shelf at projecting direction, the spacing of Grouting Pipe is not less than 3000mm, injected hole stretches in depression section,
F) C30 concrete and roadbed either flush is built in road foundation depression section, and vibration compacting, form fill concrete layer;
G) layer of concrete to be filled solidifies the backward Grouting Pipe be embedded in depression section and carries out shallow-layer high-pressure slip-casting, and grouting serous fluid adopts high strength and no shrinting cementation material, and initial grouting pressure controls at 0.5 ~ 1.0MPa, stops grouting pressure and is not less than 2.0Mpa;
H) surfacing deck on fill concrete layer.
See Fig. 8, it is the force-transmission mechanism schematic diagram before adopting restorative procedure provided by the present invention; See Fig. 9, adopt the force-transmission mechanism schematic diagram after restorative procedure provided by the present invention; Obviously, the load of roadbed settlement section can be passed to the larger non-depression roadbed region of ambient intensity by " arching " of steel arch-shelf and mini pile by the present invention, high-pressure slip-casting then plays certain compaction to weak subgrade, and fill space, top layer and the crack of weak subgrade, improve roadbed non-deformability, effectively can control the depression of weak subgrade.
With a specific embodiment, technical scheme proposed by the invention is described in detail below:
Embodiment 1:
Certain speedway high roadbed losses embankment, height of embankment 16m, single width width of roadway 12.25m, roadbed generation depression after being open to traffic 3 years, the long 23m in depression section, the maximum settlement degree of depth reaches 5cm, and causes road structure drawing crack to destroy, through repeatedly road surface jointing, fill up reparation, pavement disease still occurs repeatedly.
According to roadbed settlement situation, adopt a kind of road foundation depression prosthetic device, see Fig. 1, it comprises steel arch-shelf, mini pile, and concrete bed, billet, fill concrete and Grouting Pipe form.Determine that steel arch-shelf 1 is for I20b shaped steel arch, often save bow member web height 200mm, the wide 102mm of frange plate, edge of a wing thickness of slab 11.4mm, reserved camber 50cm, often saves length 3m, and point 8 joints are assembled, and assembled employing M30 bolt 101 connects.
Its concrete implementation step of repairing is:
A) remove the road surface structare layer of depression section roadbed 7, and dig 60cm under roadbed end face;
B) the staggered mini pile 2 squeezed into horizontal by 45 ° ~ 60 ° in non-depression section roadbed 8, the long 4m of stake, stake footpath 150mm, center to center distance (distance between stake axis) 500mm, pile body adopts C25 concreting;
C) adopt C30 concreting concrete bed 3 at pile crown, and be embedded in concrete bed by billet 4, billet is of a size of 250 × 230 × 15mm;
D) two ends are welded on billet 4 after having spliced by steel arch-shelf 1, and solder joint must adopt double welding, and welding and assembling height is not less than 6mm, and weld seam is full;
E), after excavating roadbed top layer removing foreign material and surface dust, in pre-buried 5 φ 32 Grouting Pipe 6 in excavation roadbed top layer, Grouting Pipe 6 direction keeps vertical with steel arch-shelf 1 at projecting direction, and spacing 4m, injected hole is under shed.
F) C30 fill concrete 5 and roadbed either flush is built in roadbed settlement section, and vibration compacting;
G) concrete 3 to be filled carries out shallow-layer high-pressure slip-casting after solidifying, and grouting serous fluid adopts high strength and no shrinting cementation material, and initial grouting pressure 0.8MPa stops grouting pressure 2.5MPa.
H) surfacing deck on fill concrete layer.
Repairing effect: adopt the method disclosed in the present, highway only close traffic just recovers after 15 days to be open to traffic, and the roadbed steel arch-shelf " arching " after reparation is remarkable, roadbed settlement phenomenon does not occur again, also do not occur that roadbed comes to nothing, road surface structare layer is intact, and flexible pavement only has a small amount of blind crack.
Claims (10)
1. a road foundation depression prosthetic device, is characterized in that: described road foundation depression prosthetic device comprises connector, walk abreast with trend of road the steel arch-shelf arranged and the mini pile group being arranged on steel arch-shelf two ends; Described connector comprises concrete bed and is embedded in the billet in concrete bed; Describedly be arranged on the mini pile group that steel arch-shelf often holds and include the first mini pile and the second mini pile, one end of described first mini pile and the second mini pile stretches into the non-depression section along trend of road respectively, and the other end is connected with steel arch-shelf by concrete bed and billet successively.
2. road foundation depression prosthetic device according to claim 1, is characterized in that: the non-depression section along trend of road is stretched into horizontal by 45 ° and 60 ° respectively in one end of described first mini pile and the second mini pile.
3. road foundation depression prosthetic device according to claim 2, it is characterized in that: the stake footpath of described first mini pile and the second mini pile is all not less than 150 mm, the pile body of described first mini pile and the second mini pile all adopts C25 concreting, the stake of described first mini pile and the second mini pile is long is all not less than 3000 mm, and pile center's spacing of described first mini pile and the second mini pile is the stake footpath of 4 ~ 6 times of first mini pile or the second mini pile.
4. road foundation depression prosthetic device according to claim 3, is characterized in that: described steel arch-shelf entirety is in circular curve shape; Described circular curve is determined according to road foundation depression segment length, and the camber that described circular curve raises up is 1/100L ~ 1/50L; Wherein, L is road foundation depression segment length, and the unit of L is m.
5. road foundation depression prosthetic device according to claim 4, is characterized in that: described steel arch-shelf is I20b shaped steel; Described steel arch-shelf one saves or more piece; When described steel arch-shelf is more piece, described more piece steel arch-shelf adopts the entirety of the mutual assembled formation one of M30 bolt in circular curve shape.
6. the road foundation depression prosthetic device according to claim 1 or 2 or 3 or 4 or 5, is characterized in that: described road foundation depression prosthetic device also comprises the slip casting pipe pile being arranged on road depression Duan Bingyu steel arch-shelf and being connected; Described slip casting pipe pile comprises the Grouting Pipe stretching into road depression section, and Grouting Pipe top is provided with concrete bed and is embedded in the billet on concrete bed; Described steel arch-shelf is connected with Grouting Pipe by billet and concrete bed successively.
7. road foundation depression prosthetic device according to claim 6, is characterized in that: described steel arch-shelf adopts the mode of double welding to weld with billet; Described welding and assembling height is not less than 6 mm.
8. road foundation depression prosthetic device according to claim 7, is characterized in that: the concrete that described concrete bed adopts is C30 concrete; The degree of depth that described billet embeds concrete bed is not less than 5 mm, and the size of described billet is not less than 250 × 230 × 15 mm.
9. road foundation depression prosthetic device according to claim 8, is characterized in that: described road foundation depression prosthetic device also comprises the fill concrete layer around being cast in around steel arch-shelf.
10. a road foundation depression restorative procedure for basis road foundation depression as claimed in claim 9 prosthetic device, is characterized in that: said method comprising the steps of:
A) remove depression road surface structare layer in road foundation depression section, and excavate roadbed to designated depth according to steel arch-shelf camber and protective layer thickness; Described steel arch-shelf camber is 1/100 ~ 1/50 of road foundation depression section;
B) the staggered mini pile squeezed into horizontal by 45 ° and 60 ° in the non-depression section of road foundation, the spacing of described mini pile is the stake footpath of 4 ~ 6 times of first mini pile or the second mini pile, and the stake of described mini pile is long is not less than 3000 mm;
C) adopt C30 concreting concrete bed at the pile crown place of mini pile, and billet is embedded in concrete bed; The degree of depth that described billet embeds concrete bed is not less than 5 mm; The size of described billet is not less than 250 × 230 × 15 mm;
D) be welded on billet by the two ends of the steel arch-shelf containing camber respectively by the mode of double welding, welding and assembling height is not less than 6 mm, and weld seam needs full;
E) after excavating roadbed top layer removing foreign material and surface dust, in excavation roadbed top layer one or more Grouting Pipe pre-buried, Grouting Pipe direction keeps vertical with steel arch-shelf at projecting direction, and the spacing of described Grouting Pipe is not less than 3000 mm, and described injected hole stretches in depression section;
F) C30 concrete and roadbed either flush is built in road foundation depression section, and vibration compacting, form fill concrete layer;
G) layer of concrete to be filled solidifies the backward Grouting Pipe be embedded in depression section and carries out shallow-layer high-pressure slip-casting, and grouting serous fluid adopts high strength and no shrinting cementation material, and initial grouting pressure controls at 0.5 ~ 1.0 MPa, stops grouting pressure and is not less than 2.0 Mpa;
H) surfacing deck on fill concrete layer.
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| CN201410842305.7A CN104532713B (en) | 2014-12-30 | 2014-12-30 | A kind of road foundation depression prosthetic device and restorative procedure |
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| CN201410842305.7A CN104532713B (en) | 2014-12-30 | 2014-12-30 | A kind of road foundation depression prosthetic device and restorative procedure |
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| CN104532713B CN104532713B (en) | 2016-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109082962A (en) * | 2018-09-11 | 2018-12-25 | 江西赣粤高速公路工程有限责任公司 | Environment-friendly construction method for expressway |
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| CN103334371A (en) * | 2013-07-05 | 2013-10-02 | 中南大学 | Roadbed subsidence grouting treatment structure and construction method thereof |
| CN204417945U (en) * | 2014-12-30 | 2015-06-24 | 山西省交通科学研究院 | A kind of road foundation depression prosthetic device |
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| JP2007247356A (en) * | 2006-03-20 | 2007-09-27 | Railway Technical Res Inst | Repairing method of settled ground |
| JP2007146647A (en) * | 2007-01-01 | 2007-06-14 | Suehiro Resin Kogyosho:Kk | Method of repairing road including curbstone, and road structure including curbstone formed by the repair method |
| CN101487215A (en) * | 2009-03-04 | 2009-07-22 | 朱博文 | Roadbed anti-sedimentation apparatus and its mounting method |
| CN102691255A (en) * | 2012-06-16 | 2012-09-26 | 山西省交通科学研究院 | Method for quickly repairing cement concrete pavement |
| CN103174074A (en) * | 2013-03-22 | 2013-06-26 | 浙江鸿安建设有限公司 | Sedimentation control structure of passable road highway roadbed and construction method |
| CN103334371A (en) * | 2013-07-05 | 2013-10-02 | 中南大学 | Roadbed subsidence grouting treatment structure and construction method thereof |
| CN204417945U (en) * | 2014-12-30 | 2015-06-24 | 山西省交通科学研究院 | A kind of road foundation depression prosthetic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109082962A (en) * | 2018-09-11 | 2018-12-25 | 江西赣粤高速公路工程有限责任公司 | Environment-friendly construction method for expressway |
| CN109082962B (en) * | 2018-09-11 | 2020-06-12 | 江西赣粤高速公路工程有限责任公司 | Environment-friendly construction method for expressway |
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| CN104532713B (en) | 2016-08-24 |
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