CN100365210C - Construction method for positioning and compacting subgrade - Google Patents
Construction method for positioning and compacting subgrade Download PDFInfo
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- CN100365210C CN100365210C CNB2004100065464A CN200410006546A CN100365210C CN 100365210 C CN100365210 C CN 100365210C CN B2004100065464 A CNB2004100065464 A CN B2004100065464A CN 200410006546 A CN200410006546 A CN 200410006546A CN 100365210 C CN100365210 C CN 100365210C
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- roadbed
- road bed
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Abstract
The present invention relates to a highway construction method, particularly to a construction method for positioning and tampering a road bed. The present invention is characterized in that high-speed hydraulic tampers with circular bases and bases in other shapes with the energy from 10 to 50KJ are adopted on the road bed; the tamping operation of continuous positioning of 5 to 60 times per minute is carried out; the compactness of the road bed is obtained or increased by increasing tamping frequency, and the reinforced layer with the thickness from 1.0 to 1.5m is formed. The construction method can not only be suitable for the construction of the road surface of a common region, but also suitable for the construction of the positioning and tamping road bed of narrow working faces; the premature failure of the road surface caused by the differential settlement of the construction road bed can be avoided, and the construction efficiency and the engineering quality of the road base are further increased.
Description
Technical field
The present invention relates to a kind of construction of the highway field, particularly a kind of tamping road bed job practices in location that is applicable to the roadbed in extreme terrain or the narrow location of work plane.
Background technology
According to the new situations that development of social economy and traffic are accelerated development, transportation industry has been adjusted the target of the Tenth Five-Year Plan (2001-2005), and to " 15 " end, national highway is newly repaiied 280,000 kilometers of mileages, makes total kilometrage reach 1,950,000 kilometers.Wherein speedway is brought up to 3.5 ten thousand kilometers by 2.5 ten thousand kilometers, and the above highway of secondary is brought up to 300,000 kilometers by 270,000 kilometers.Have quite a lot of mileage to be distributed in from high mountain, mountain and special geology area, it is very huge that newly-built earth work fills quantity.The heavy traffic that the above Highway house of speedway and secondary undertakes proposes the higher quality requirement to roadbed, to avoid the early damage of highway.Roadbed embankment height in mountain area mostly is the cubic meter of stone or earth-rock mixture, particularly fills out and digs handing-over, partly fill out and partly dig the location, the construction period is short, moulding subgrade stability deficiency of time, existing conventional compacting equipment is constructed, and can't very resolve the differential deformation of roadbed effectively, causes surface deformation easily and destroys.Use impact densifying-machine that roadbed is augmented in recent years and roll (as the patent No. 98125050.5 disclosed [impact-rolling is augmented subgrade strength and stable method]), the uniformity and the compactness of roadbed have been increased effectively, reduce relative settlement behind the subgrade construction, improved the resistance to overturning and the intensity of subgrade and pavement.Because impact road roller rolls the roadbed working area should not be less than 1000m
2, the short lines that turning roadway can be set than the narrow face is apart from being less than 100m, and width should not be less than 6m.Bridges and culverts structure small size basis compacting in the mountain area, cut-fill subgrades, and the bridges and culverts passage of region of no relief is more, many roadbed straightways can not adopt the impact densifying-machine construction less than 100m.In this case, need seek a kind of high speed, quick, improve the construction technique of roadbed bulk strength and stability.
The content of invention
The object of the present invention is to provide a kind of tamping road bed job practices in location that comprises narrow work plane, the road surface early damage that can avoid its roadbed relative settlement of constructing to cause, and the efficiency of construction of roadbed and workmanship are further improved.
The technical scheme that realizes above-mentioned purpose of the present invention is as follows:
The tamping road bed job practices in a kind of location is characterized in that: adopt the high-speed hydraulic rammer compacter with base to locate tamping operation continuously, by repeatedly compacting, roadbed is reached or increase more than the compactness to 90%, formation thickness is the back-up coat of 1.0～1.5m.
The tamping road bed job practices in described location, it is characterized in that: the compacting of on roadbed, fixing a point, ram continuously 5～60 times, ram energy is 50～10KJ at every turn, for fill stratum, when each fixed point is rammed total energy and is 250KJ, the degree of compaction of roadbed reaches 90%, and when each fixed point was rammed total energy and is 600KJ, the degree of compaction of roadbed reached 95%, when each fixed point was rammed total energy and is 1200KJ, the degree of compaction of roadbed reached 98%; The roadbed of crossing for vibroroller cmpacting is that operation is augmented in the compacting of 270KJ～360KJ through total energy, and its degree of compaction reaches 97%～98%.
The tamping road bed job practices in described location is characterized in that: tamp on roadbed and adopt the high-speed hydraulic rammer compacter that has circle, rectangular shape base when working continuously.
The tamping road bed job practices in described location is characterized in that: the layout of tamping point base is triangular in shape regularly arranged.
The tamping road bed job practices in described location is characterized in that: be contact-type or clearance type between this regularly arranged tamping point base edge triangular in shape.
The tamping road bed job practices in described location is characterized in that: these regularly arranged clearance type tamping point base edge spacing≤1.2 base radiuses triangular in shape.
The present invention provides the tamping road bed job practices in a kind of location, be to the roadbed after the embankment, and behind process vibratory roller layered rolling, adopt 10～50KJ high-speed hydraulic rammer compacter location of circular and other shape bases tamping road bed, at 5～60 continuous positioning operations of the enterprising lines per minute clock compacting of roadbed, by increasing the compacting number of times, roadbed is reached or increase compactness, and formation thickness is at the back-up coat of 1.0～1.5m.
The invention has the advantages that:
The tamping road bed job practices in location of the present invention, be applicable to the small size structure grounds such as bridges and culverts in mountain area, the compacting construction of cut-fill subgrades, and the bridges and culverts passage of region of no relief is more, and the roadbed straightway can not adopt the subgrade construction in the location of impact densifying-machine construction less than 100m.Can avoid the filled-up ground relative settlement to cause surface deformation and destroy, thus the bulk strength and the uniformity of raising subgrade and pavement, the excellent service level of maintenance surface evenness.Be a kind of high speed, quick, improve the job practices of roadbed bulk strength and stability.
For method of the present invention, characteristics and effect thereof are had further understanding, enumerate specific embodiment now, and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the base that the drops hammer of the present invention schematic diagram () of layouting.
Fig. 2 is the base that the drops hammer of the present invention schematic diagram (two) of layouting.
The specific embodiment
The tamping road bed job practices in a kind of location provided by the present invention, be meant compacting construction to roadbed, it mainly is: roadbed is adopted have circular and other shape bases, 10～50KJ high-speed hydraulic rammer compacter is located tamping road bed, be preferably and adopt 28～36KJ high-speed hydraulic rammer compacter, according to the material and the thickness of filling out roadbed, on roadbed, carry out continuous positioning operation with per minute compacting 5～60 times, be preferably per minute compacting 20～35 times; By increasing compacting number of times and compaction effort, roadbed is reached or increase compactness, formation thickness is at the back-up coat of 1.0～1.5m.Construct when the tamping road bed job practices in location provided by the present invention can be used for the rammer of filled-up ground, also can be used for the roadbed after rolling is augmented operation, with its degree of compaction of further raising.
During concrete construction, the layout of tamping point base adopts triangular in shape regularly arranged.Can the contact-type (as shown in Figure 1) that be in contact with one another between each tamping point base edge.For improving efficiency of construction, also can adopt the clearance type (as shown in Figure 2) that leaves the gap each other.When adopting clearance type, the spacing between adjacent two base edges≤1.2 base radiuses is preferably the clearance type that equals to adopt the base radius.Adopt base intermittence equilateral triangle to layout, because there is not compacted region of part in the compacting gap, the top layer degree of compaction is under some influence, but because active force is along propagating with oblique below, 45 °-Φ of horizontal sextant angle/2, so the soil body compacting below the top layer is even, after tamping operation is finished, need to flatten compacting operation by common road roller again, the top layer not the thickness of compacted region in the job area of common road roller, so can access effective compacting equally, and tamping operation efficient can be greatly improved.
Embodiment 1
The high-speed hydraulic rammer compacter that adopts location 30KJ to ram energy comes tamping road bed, and Xi'an road building machinery test center (the Asia indoor experimental tank of maximum embankment detects), the base that drops hammer is layouted by the contact-type equilateral triangle.Fine grained soils fills thick 1.25m, and top grade rams 24, and (ram total energy/every point=30*24=720KJ) when inferior, surface layer and bottom degree of compaction are respectively 95% and 90%, and the mean pressure solidity of filling thick 1.0m is 93%; Fine grained soils fills thick 1.25m, rams 12 times, and the mean pressure solidity is 91.6%.
Loess Excavation cutting ground, adopt 30KJ to ram energy, (ram that total energy/every point=30*12=380KJ), 50cm layouts by the base edge gap, the degree of compaction top layer is 95.3% to high-grade ram for 12 times, 30cm is 94.1% under the top layer, 60cm is 90.3% under the top layer.
Embodiment 3
Adopt 30KJ to ram energy, loose laying depth is 1.25m, and base contact equilateral triangle is layouted, and tamps 12 times and (rams that total energy/every point=30*12=380KJ), the mean pressure solidity is 91.6%.
Embodiment 4 (purpose that increases embodiment 4,5 is 5-60 time and the 10-50KJ that is proposed in the support claim)
Adopt 50KJ to ram energy, loose laying depth is 1.25m, and base contact equilateral triangle is layouted, and tamps 5 times and (rams that total energy/every point=50*5=250KJ), top layer and bottom degree of compaction are 91.5% and 90%.
Embodiment 5
Adopt 10KJ to ram energy, loose laying depth is 1.25m, and base intermittence equilateral triangle is layouted, and tamps 60 times and (rams that total energy/every point=10*60=600KJ), top layer and bottom degree of compaction are 93% and 90%.
Embodiment 6
Adopt 50KJ to ram energy, loose laying depth is 1.5m, and base contact equilateral triangle is layouted, and tamps 24 times and (rams that total energy/every point=50*24=1200KJ), the top layer degree of compaction is 98%;
Above specific embodiment is the compacting that is used for pine shop layer, and compacted density is always rammed the product that energy equals to ram energy at every turn and rams number of times with always to ram energy relevant, and it is big more always to ram energy, and then degree of compaction is also big more.For reaching certain degree of compaction, can select certain energy of always ramming.
For through the roadbed behind the vibratory roller layered rolling,, also can adopt method provided by the present invention to augment, shown in following embodiment for improving degree of compaction.
Embodiment 7
At sandstone rock-filling embankment through 18 tons of high 13m of vibratory roller layered rolling, partly fill out half road breaking section, adopt 30KJ to ram energy, high-grade ram for 9 times (rammed total energy/every point=30*9=270KJ), base intermittence equilateral triangle is layouted, and base edge gap 50cm (being the base radius) augments and rams operation, the top layer degree of compaction in three highway sections brings up to 98.2%, 97.3%, 97.5% respectively by 92%, and the average settlement amount is respectively 97,86,89mm.
Embodiment 8
The wide scope of operation rubble of culvert platform back of the body 3m filler is after vibratory roller rolls, adopt 30KJ to ram energy, carry out 9 respectively and (ram that total energy/every point=30*9=270KJ) is inferior, 12 times (ramming total energy/every point=30*12=360KJ) augments and ram operation, the average settlement amount is respectively 92,104mm, and degree of compaction brings up to 97.8%, 98.5% respectively by former 92%.
Above embodiment and detection show, adopt have necessarily ram energy the high-speed hydraulic rammer compacter in conjunction with certain number of times of ramming, can effectively influence the degree of compaction of the degree of depth 1.0～1.5m roadbed; Equilateral triangle is rammed and is layouted, and the compacting good uniformity can be finished the compacting in narrow work plane and special location and augment tamping operation, satisfies the workmanship requirement.
Claims (5)
1. locate tamping road bed job practices for one kind, employing has the high-speed hydraulic rammer compacter of base and locatees tamping operation continuously, by repeatedly compacting, roadbed is reached or increase more than the compactness to 90%, forming thickness is the back-up coat of 1.0～1.5m, it is characterized in that: the compacting of on roadbed, fixing a point, ram continuously 5～60 times, ram energy is 50～10KJ at every turn, for fill stratum, when each fixed point is rammed total energy and is 250KJ, the degree of compaction of roadbed reaches 90%, and when each fixed point was rammed total energy and is 600KJ, the degree of compaction of roadbed reached 95%, when each fixed point was rammed total energy and is 1200KJ, the degree of compaction of roadbed reached 98%; The roadbed of crossing for vibroroller cmpacting is that operation is augmented in the compacting of 270KJ～360KJ through total energy, and its degree of compaction reaches 97%～98%.
2. the tamping road bed job practices in location according to claim 1 is characterized in that: tamp on roadbed and adopt the high-speed hydraulic rammer compacter that has circle, rectangular shape base when working continuously.
3. the tamping road bed job practices in location according to claim 1 is characterized in that: the layout of tamping point base is triangular in shape regularly arranged.
4. the tamping road bed job practices in location according to claim 3 is characterized in that: be contact-type or clearance type between this regularly arranged tamping point base edge triangular in shape.
5. the tamping road bed job practices in location according to claim 4 is characterized in that: these regularly arranged clearance type tamping point base edge spacing≤1.2 base radiuses triangular in shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100065464A CN100365210C (en) | 2004-03-08 | 2004-03-08 | Construction method for positioning and compacting subgrade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100065464A CN100365210C (en) | 2004-03-08 | 2004-03-08 | Construction method for positioning and compacting subgrade |
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| CN1667193A CN1667193A (en) | 2005-09-14 |
| CN100365210C true CN100365210C (en) | 2008-01-30 |
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| CNB2004100065464A Expired - Fee Related CN100365210C (en) | 2004-03-08 | 2004-03-08 | Construction method for positioning and compacting subgrade |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439600C (en) * | 2006-08-11 | 2008-12-03 | 周洪文 | Treatment method of newly built high way railway engineering soft foundation |
| CN102912704B (en) * | 2011-12-27 | 2015-09-09 | 于天庆 | A kind of assembling road of road structure |
| CN102828453A (en) * | 2012-09-17 | 2012-12-19 | 武卫国 | Stamping reinforcement method of weak rolling area of roadbed and application thereof |
| CN107513914A (en) * | 2017-08-02 | 2017-12-26 | 曹斌 | A kind of coupling section of the new and old road reinforcement and detection method |
| CN110029652A (en) * | 2019-05-29 | 2019-07-19 | 中国十七冶集团有限公司 | A kind of construction technology reducing collapsible loess settlement after construction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2121481U (en) * | 1991-10-11 | 1992-11-11 | ***长沙建筑机械研究所 | Hydraulic rammer |
| RU2114954C1 (en) * | 1996-08-27 | 1998-07-10 | Герман Павлович Тярасов | Hydraulic pulsing tamper |
| CN1214392A (en) * | 1998-11-30 | 1999-04-21 | 杨世基 | Impact rolling to raise and stabilize road bed strength |
| CN2503115Y (en) * | 2001-10-19 | 2002-07-31 | 周京舟 | Hydraulic plate vibrating rammer |
-
2004
- 2004-03-08 CN CNB2004100065464A patent/CN100365210C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2121481U (en) * | 1991-10-11 | 1992-11-11 | ***长沙建筑机械研究所 | Hydraulic rammer |
| RU2114954C1 (en) * | 1996-08-27 | 1998-07-10 | Герман Павлович Тярасов | Hydraulic pulsing tamper |
| CN1214392A (en) * | 1998-11-30 | 1999-04-21 | 杨世基 | Impact rolling to raise and stabilize road bed strength |
| CN2503115Y (en) * | 2001-10-19 | 2002-07-31 | 周京舟 | Hydraulic plate vibrating rammer |
Non-Patent Citations (2)
| Title |
|---|
| 强夯法加固抛填土石方地基工法. 樊高义，王毓进.西部探矿工程，第8卷第4期. 1996 * |
| 自行式快速夯实机的发展. 曹斌，贺杰，逢宏波.交通世界，第7期. 2003 * |
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Granted publication date: 20080130 Termination date: 20120308 |