CN107165013A - Geotechnical grid reinforcement foam concrete light road foundation fills structure and its method - Google Patents
Geotechnical grid reinforcement foam concrete light road foundation fills structure and its method Download PDFInfo
- Publication number
- CN107165013A CN107165013A CN201710407587.1A CN201710407587A CN107165013A CN 107165013 A CN107165013 A CN 107165013A CN 201710407587 A CN201710407587 A CN 201710407587A CN 107165013 A CN107165013 A CN 107165013A
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- geotechnical grid
- foam concrete
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- grid reinforcement
- road
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- 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
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/227—Gutters; Channels ; Roof drainage discharge ducts set in sidewalks
-
- 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
- E01C3/02—Concrete base for bituminous paving
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
Structure and its method are filled the invention discloses a kind of geotechnical grid reinforcement foam concrete light road foundation, the design and construction technical field belonged in road foundation engineering.The road structure of the present invention, using high intensity geotechnical grid reinforcement, then is filled by light foam concrete and formed.The construction method of the present invention, including：Former foundation dredging, leveling；Geotechnical grid tensioning, fixation；Foamed concrete material pours filling；Gutter is set；Geotextiles are laid.The road structure of the present invention, filled using geotechnical grid reinforcement foam concrete, it is big with basic unit's bending tensile strength, the characteristics of good endurance, it is to avoid larger flexure, deformation are produced, while utilizing geotechnical grid reinforcement, further enhance the intensity and globality of basic unit, the pavement structure from bottom to top caused by material cracks, crushing is avoided to damage, it is adaptable to the subgrade engineering building of each rank road, the less geological conditions of the foundation bearing capacity that is particularly suitable for use in.
Description
Technical field
The invention belongs to the design and construction technical field in road foundation engineering, and in particular to a kind of geotechnical grid reinforcement
Foam concrete light road foundation fills structure and its method.
Background technology
In road engineering design, from roadbed material and mechanical characteristic, roadbed is divided into flexbile base, semi-rigid
Basic unit and the class of rigid base three.The flexbile base rigidity of structure is smaller, and larger vertical change is easily produced under Vehicle Load
Shape, so that road surface produces larger deformation, requires higher to thickness of bituminous surface.Semi-rigid type base, rigid base's intensity compared with
Greatly, but crack is also easy to produce under temperature, vehicle loading, causes bituminous paving formation reflection crack.The integrality of road structure
Have a great impact to road comfortableness, traffic safety.
Foam concrete also known as lightweight concrete, its manufacturing process can trace back to the Europe at initial stage in 19th century earliest.Foam
Concrete is, by physics, chemical mode, to introduce gases into concrete mortar, through maintenance, and containing for formation is a large amount of tiny
Sealed porosity, and the concrete product with suitable intensity.Foam concrete is a kind of new energy-conserving and environment-protective construction material, with
Conventional cement concrete material is compared, and intensity is weaker, but it has that Lightness, self compacting ability is good for filling, thermal and insulating performance
Well, the features such as good endurance, soft soil foundation, Abutment Back are widely used at this stage to be filled, assembled architecture house, engineering backfill
In terms of.
Geotechnical grid is the one kind occurred 1980s three as formed by high density polyethylene (HDPE) is welded through high-tenacity
Tie up network structure earth working material.Netted, the bulk material such as filling soil, rubble can be pulled into during construction, is constituted with powerful lateral
The structure of limitation.Current extensive utilization carries on the back the engineerings such as Roadbed Soil reinforcement to unfavorable foundation processing, slope protection processing, platform.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of geotechnical grid reinforcement foam
Concrete light roadbed filling structure and its method, it is not high with the intensity for solving existing roadbed presence, easily ftracture, Moisture Damage is tight
The problems such as weight, make road in the defined service life time limit, road structure is intact, the destruction produced from bottom to top is reduced.
Technical scheme：To achieve the above object, the technical solution adopted by the present invention is：
A kind of geotechnical grid reinforcement foam concrete road structure, if successively laying framing by dried layer geotechnical grid,
Foam concrete is filled in the geotechnical grid, and the basal layer of the geotechnical grid is fixed on foundation surface；The geotechnological lattice
Gutter, foam concrete top laying draining geotextiles are provided with outside the both sides of room.
Further, the thickness of the roadbed geotechnical grid structure is between 10~20cm, if required thickness ＞ 20cm, spread
If double-deck geotechnical grid.
Further, a length of 20-25cm of geotechnical grid single hole, a width of 12-15cm of single hole, single hole area are 100-
120cm2, cell compartment thickness is 1-2mm.
Further, the geotechnical grid leaves keyhole along road direction both sides, with pile steel nail by the geotechnological lattice of outermost
Room is fixed, and constant depth is 20-25cm.
Further, the geotechnical grid both sides, along road direction provided with spall drain wide 10-15cm.
Further, the packed height in the gutter is identical with the reinforcement foam concrete roadbed floor height that laying is completed.
Further, the roadbed uses compression strength to be filled for 7-9MPa cement-fly ash foam concrete and formed.
Further, the cement-fly ash foam concrete by cement, flyash, water according to 9:5:7 mass ratio
Example, is mixed with foaming agent and forms.
A kind of method of geotechnical grid reinforcement foam concrete road structure, is made up of following construction procedure：
(1) original place base is excavated, leveling is handled, it is ensured that foundation surface is smooth, the gradient is uniform；
(2) foundation surface, using both sides keyhole, is fixed in geotechnical grid both sides by tensioning geotechnical grid material；
(3) it is close to both sides geotechnical grid and lays plank molding；
(4) cement, flyash, water are pressed into (8-9):5:7 mass ratio, cement-fly ash is mixed with foaming agent
Foam concrete, is cast in the mould of geotechnical grid reinforcement；
(5) the reinforcement foam concrete to roadbed is stripped, conserved, being dried, and reaches specified intensity；
(6) the wide spall drains of 10-15cm are laid in both sides；
(7) one layer of draining geotextiles are set on reinforced-concrete top.
Beneficial effect：Geotechnical grid reinforcement foam concrete light road foundation structure and its method that the present invention is provided, with biography
The graded broken stone flexbile base of system is compared, and the present invention has bigger resistance to compression, bending resistance drawing and shearing strength.It is firm with tradition half
Property, rigid base compare, and by the restriction effect of geotechnical grid, will not produce long large fracture so that road surface will not be formed because
Base course crack and the reflection crack produced.In the case that foam concrete is crushed, by the lateral of geotechnical grid side wall
Restraint and frictional force effect, the roadbed remain to the integrality and intensity of holding structure, will not produce larger Vertical Settlement and become
Shape.The geotextiles laid in the present invention and the gutter of both sides can discharge the water for penetrating into roadbed rapidly, reduce Moisture Damage and make
Into influence.Due to having used foam concrete, the road structure is relatively light, is applicable to the foundation bearing capacities such as soft soil foundation
Less geological conditions.Foundation base intension is higher, reduces road surface thickness, there is certain economic benefit, meanwhile, foam concrete stream
Dynamic property is good, with filling self compacting ability, is easy to construction.
Brief description of the drawings
Fig. 1 is road structure schematic diagram of the present invention；
Fig. 2 is single geotechnical grid scale diagrams (exemplified by along road direction leftmost side geotechnical grid)；
Fig. 3 is that geotechnical grid pile steel nail fixes schematic diagram.
Embodiment
The invention discloses a kind of foam concrete light road foundation fill placement technique of utilization geotechnical grid reinforcement, belong to road
Design and construction technical field in subgrade engineering.The road structure of the present invention, using high intensity geotechnical grid reinforcement, then by light
Matter foam concrete, which is filled, to be formed.The construction method of the present invention, including：Former foundation dredging, leveling；Geotechnical grid tensioning, fixation；
Foamed concrete material pours filling；Gutter is set；Geotextiles are laid.The road structure of the present invention, using geotechnical grid plus
Muscle foam concrete is filled, big with basic unit's bending tensile strength, the characteristics of good endurance, it is to avoid produce larger flexure, deformation,
Simultaneously utilize geotechnical grid reinforcement, further enhance the intensity and globality of basic unit, it is to avoid because material cracks, crushing caused by by
Pavement structure on down is damaged, it is adaptable to which the subgrade engineering building of each rank road, the foundation bearing capacity that is particularly suitable for use in is smaller
Geological conditions.
A kind of geotechnical grid reinforcement foam concrete road structure, using the laying of high intensity geotechnical grid, is fixed on ground
Surface, foam concrete is filled in geotechnical grid, and geotechnical grid both sides are provided with gutter, the laying draining of foam concrete top
Geotextiles.
Wherein, road structure thickness degree (individual layer geotechnical grid height) is typically in the range of 10~20cm, according to specific road etc.
Depending on level, the volume of traffic, if required thickness ＞ 20cm, the double-deck geotechnical grid of laying.Roadbed is about 7-9MPa using compression strength
Cement-fly ash foam concrete fill and form, such a cement-fly ash foam concrete by cement, flyash, water according to
9:5:7 mass ratio, is mixed with appropriate foaming agent and forms.
Geotechnical grid leaves keyhole along road direction both sides, is fixed outermost geotechnical grid with pile steel nail, fixed deep
Degree is about 20-25cm.Geotechnical grid both sides, along road direction provided with spall drain wide 10-15cm.Geotechnical grid reinforcement is mixed
Solidifying soil top sets one layer of draining geotextiles.
The geotechnical grid reinforcement foam concrete road structure of the present invention, is made up of following construction procedure：
(1) original place base is excavated, leveling is handled, it is ensured that foundation surface is smooth, the gradient is uniform.
(2) foundation surface, using both sides keyhole, is fixed in geotechnical grid both sides by tensioning geotechnical grid material.
(3) it is close to both sides geotechnical grid and lays plank molding.
(4) cement, flyash, water are pressed into (8-9):5:7 mass ratio, cement-powder is mixed with appropriate foaming agent
Coal ash foam concrete, is cast in the mould of geotechnical grid reinforcement.
(5) the reinforcement foam concrete to roadbed is stripped, conserved, being dried, and reaches specified intensity.
(6) the wide spall drains of 10-15cm are laid in both sides.
(7) one layer of draining geotextiles (including covering gutter) are set on reinforced-concrete top.
Below in conjunction with the accompanying drawings, the embodiment to the fill placement technique of the present invention is further described.Obviously, retouched
The embodiment stated is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention,
The every other embodiment that those skilled in the art are obtained on the premise of creative technology is not made, belongs to the present invention
Protection domain.
Embodiment
It is as shown in Figure 1 a kind of geotechnical grid reinforcement foam concrete light road foundation structure, including geotechnical grid structure 1,
Cement-fly ash foam concrete filling 2, ubbase drain ditch 3 is arranged in the geotextiles 4 on foam concrete top, geotechnical grid
The pile steel nail 5 of both sides.Specific construction mode has the following steps：
(1) according to the linear design of road, original place base is excavated, filled, is compacted, leveling is handled, it is ensured that after processing
Foundation surface it is smooth, the gradient is uniform.Ground after processing is further cleared up, it is ensured that without bulk rubble, debris and ponding.
(2) the geotechnical grid material of dimension is prepared according to road width, as shown in Fig. 2 the present embodiment chooses geotechnique
Cell compartment single hole length (L) is 20cm, and single hole wide (B) is 12cm, and geotechnical grid outside is waveform, and single hole area is about 120cm2,
Cell compartment thickness is 1mm.Laid along road direction and tensioning geotechnical grid 1 at scene, it is ensured that geotechnical grid tensioning completely, is being opened
During paving, geotechnical grid is fixed with pile steel nail 5 simultaneously for both sides, and dowel pin depth is 20cm, as shown in Figure 3.
(3) it is close to both sides geotechnical grid dowel pin boarding molding.
(4) by water, cement, flyash according to 7：(8-9)：5 mass ratio is mixed, and adds foaming agent, is prepared anti-
The cement-fly ash foam concrete 2 that Compressive Strength is about 8MPa.The foam concrete prepared is poured by way of pumping
In roadbed mould.Because foam concrete has preferably filling self compacting ability, without being vibrated and being rolled, only need to carry out
Surface smoothness processing.
(5) the reinforcement foam concrete be stripped, conserved, being dried, reaching specified intensity.
(6) the wide subgrade drainage ditch 3 of 10cm or so is set in roadbed both sides, and is filled with rubble, packed height with
Lay the reinforcement foam concrete roadbed floor height completed identical, it is ensured that there is no big sky between draining geotextiles and gutter rubble
Gap, prevents later stage road surface from longitudinal crack occur above this border.
(7) one layer of geotextiles 4 are laid on the reinforcement foam concrete roadbed top is used for draining, its width and whole roadbed
Overall width (including both sides gutter) is consistent.
Whether this construction should examine associated materials qualified before carrying out, including the geotechnical grid strength of materials (including joint connection
Place) it is whether up to standard, whether geotechnical grid has breakage, and whether pile steel nail quality qualified, and whether geotextiles quality up to standard etc..If
There is the underproof situation of material, it is necessary to which relevant manufacturers are changed immediately, need to change material supplier if necessary.The geotechnique of this case
Cell compartment reinforcement foam concrete light road foundation, its thickness can be adjusted according to category of roads, traffic levels.
The construction subgrade, the characteristics of with lightweight, intensity high, good integrity and good drainage.With conventional rigid, half just
Property basic unit compares, and by geotechnical grid restriction effect, will not produce up to crack, road surface is not finally produced more reflection and split
Seam.Compared with conventional flex basic unit, there is bigger resistance to compression, bending resistance drawing and shearing strength again.Even in foam concrete quilt
In the case of crushing, acted on by geotechnical grid, remain to keep the integrality of road structure.Both sides gutter can will penetrate into roadbed
Water discharge rapidly, reduce Moisture Damage influence.Foam concrete good fluidity, with filling self compacting ability, exempts from compacting, is easy to
Construction.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of geotechnical grid reinforcement foam concrete road structure, it is characterised in that：If successively being laid by dried layer geotechnical grid
Framing, foam concrete is filled in the geotechnical grid, and the basal layer of the geotechnical grid is fixed on foundation surface；Institute
State and gutter is provided with outside geotechnical grid both sides, foam concrete top laying draining geotextiles.
2. geotechnical grid reinforcement foam concrete road structure according to claim 1, it is characterised in that：The subgrade soils
The thickness of work cell compartment structure is between 10~20cm, if required thickness ＞ 20cm, the double-deck geotechnical grid of laying.
3. geotechnical grid reinforcement foam concrete road structure according to claim 1, it is characterised in that：The geotechnological lattice
The a length of 20-25cm of room single hole, a width of 12-15cm of single hole, single hole area are 100-120cm2, and cell compartment thickness is 1-2mm.
4. geotechnical grid reinforcement foam concrete road structure according to claim 1, it is characterised in that：The geotechnological lattice
Keyhole is left in room along road direction both sides, is fixed outermost geotechnical grid with pile steel nail, and constant depth is 20-25cm.
5. geotechnical grid reinforcement foam concrete road structure according to claim 1, it is characterised in that：The geotechnological lattice
Room both sides, along road direction provided with spall drain wide 10-15cm.
6. geotechnical grid reinforcement foam concrete road structure according to claim 1 or 5, it is characterised in that：The row
The packed height in ditch is identical with the reinforcement foam concrete roadbed floor height that laying is completed.
7. geotechnical grid reinforcement foam concrete road structure according to claim 1, it is characterised in that：The roadbed is adopted
The cement-fly ash foam concrete for being 7-9MPa with compression strength, which is filled, to be formed.
8. the geotechnical grid reinforcement foam concrete road structure according to claim 1 or 7, it is characterised in that：The water
Mud-fly ash foam concrete is by cement, flyash, water according to 9:5:7 mass ratio, is mixed with foaming agent and forms.
9. a kind of method of geotechnical grid reinforcement foam concrete road structure, it is characterised in that：It is made up of following construction procedure：
(1) original place base is excavated, leveling is handled, it is ensured that foundation surface is smooth, the gradient is uniform；
(2) foundation surface, using both sides keyhole, is fixed in geotechnical grid both sides by tensioning geotechnical grid material；
(3) it is close to both sides geotechnical grid and lays plank molding；
(4) cement, flyash, water are pressed into (8-9):5:7 mass ratio, cement-fly ash foam is mixed with foaming agent
Concrete, is cast in the mould of geotechnical grid reinforcement；
(5) the reinforcement foam concrete to roadbed is stripped, conserved, being dried, and reaches specified intensity；
(6) the wide spall drains of 10-15cm are laid in both sides；
(7) one layer of draining geotextiles are set on reinforced-concrete top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407587.1A CN107165013A (en) | 2017-06-02 | 2017-06-02 | Geotechnical grid reinforcement foam concrete light road foundation fills structure and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407587.1A CN107165013A (en) | 2017-06-02 | 2017-06-02 | Geotechnical grid reinforcement foam concrete light road foundation fills structure and its method |
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| CN107165013A true CN107165013A (en) | 2017-09-15 |
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| CN201710407587.1A Pending CN107165013A (en) | 2017-06-02 | 2017-06-02 | Geotechnical grid reinforcement foam concrete light road foundation fills structure and its method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935626A (en) * | 2017-11-27 | 2018-04-20 | 固岩科技发展有限公司 | A kind of construction method of high-early-strength type road |
| CN108824454A (en) * | 2018-08-31 | 2018-11-16 | 福州美佳环保资源开发有限公司 | A kind of existing road back fill of pipe trough structure and its construction method |
| CN111648191A (en) * | 2020-06-21 | 2020-09-11 | 苏州云逸航空复合材料结构有限公司 | Pavement structure |
| CN111962350A (en) * | 2020-09-18 | 2020-11-20 | 湖南科技大学 | Geocell reinforced cement concrete pavement structure and method for calculating thickness of surface slab |
| CN113403900A (en) * | 2021-01-26 | 2021-09-17 | 绍兴文理学院 | Light two-ash soil roadbed construction method based on solid waste utilization |
| CN113718572A (en) * | 2021-01-26 | 2021-11-30 | 绍兴文理学院 | Light two grey dirt road bed structures based on solid useless utilization |
| CN114717900A (en) * | 2021-01-05 | 2022-07-08 | 上海靓固生态环境科技股份有限公司 | Colored water-permeable integral pavement for high-speed service area and construction method |
| CN115305757A (en) * | 2021-12-23 | 2022-11-08 | 山东建筑大学 | Metamaterial roadbed and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107935626A (en) * | 2017-11-27 | 2018-04-20 | 固岩科技发展有限公司 | A kind of construction method of high-early-strength type road |
| CN108824454A (en) * | 2018-08-31 | 2018-11-16 | 福州美佳环保资源开发有限公司 | A kind of existing road back fill of pipe trough structure and its construction method |
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| CN114717900A (en) * | 2021-01-05 | 2022-07-08 | 上海靓固生态环境科技股份有限公司 | Colored water-permeable integral pavement for high-speed service area and construction method |
| CN114717900B (en) * | 2021-01-05 | 2024-06-07 | 上海靓固生态环境科技股份有限公司 | Color permeable integral pavement for high-speed service area and construction method |
| CN113403900A (en) * | 2021-01-26 | 2021-09-17 | 绍兴文理学院 | Light two-ash soil roadbed construction method based on solid waste utilization |
| CN113718572A (en) * | 2021-01-26 | 2021-11-30 | 绍兴文理学院 | Light two grey dirt road bed structures based on solid useless utilization |
| CN115305757A (en) * | 2021-12-23 | 2022-11-08 | 山东建筑大学 | Metamaterial roadbed and construction method thereof |
| CN115305757B (en) * | 2021-12-23 | 2024-03-26 | 山东建筑大学 | Metamaterial roadbed and construction method thereof |
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Application publication date: 20170915 |