CN102031743A - Construction method of mudstone-filled embankment - Google Patents
Construction method of mudstone-filled embankment Download PDFInfo
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- CN102031743A CN102031743A CN 201010592513 CN201010592513A CN102031743A CN 102031743 A CN102031743 A CN 102031743A CN 201010592513 CN201010592513 CN 201010592513 CN 201010592513 A CN201010592513 A CN 201010592513A CN 102031743 A CN102031743 A CN 102031743A
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Abstract
The invention relates to a construction method of a mudstone-filled embankment, comprising the following steps: levelling the embankment; arranging ramming points, wherein the positions of the ramming points on an upper layer and a lower layer are staggered, and the ramming points on the second layer are in the middle of the ramming points on the first layer; filling with the ramming points at positions which is 0.5-2.0 m far away from the top of a road bed, wherein the ramming point overlapping area is not less than 1/3; during strong forced ramming construction, carrying out forced ramming construction on the ramming points accurately by a forced rammer; detecting that settlement, heavy dynamic penetration value and surface wave velocity are qualified, filling next layer of embankment; carrying out forced ramming on half-dug and half-filled embankment, and ramming towards the middle of the embankment row by row from the edge of the embankment; carrying out the forced ramming on the embankment of the boundary of filling and digging; ramming the boundary of filling and digging row by row from the edge of the embankment on the position far away from the boundary of filling and digging; levelling after ramming is finished; and then, compacting by strong vibration. The invention has the advantages that fewer force ramming processing and constructing machines are utilized, the method is relatively simple, the construction period is obviously shorter than that of sand-mixed construction, the excavation utilization ratio is improved, the cost for carrying out the secondary crushing on rock is reduced, and the project quality is good.
Description
Technical field
The present invention relates to a kind of job practices of railway embankment using, particularly relate to a kind of job practices of mud stone railway embankment using.
Background technology
It is domestic that Ji Shao speedway is positioned at the Jiyuan City, Henan Province, be provincial arterial highway placanticline in the Freeway in Henan Province planning net to important a section of Jiyuan speedway, also be one of the northwestward, Henan Province main exit road of leading to Shanxi.Route total length 59.7Km, project region most surfaces covering layer are strong-weathered rock or a small amount of low liquid limit clay, and the bottom is argillaceous siltstoue and mud stone.These rocks intensity under dry state is higher, very easily disintegration under Riddled Condition, softening, and intensity reduces rapidly.Particularly the intensity under the full water state of mud stone only be under the dry state intensity about 10%, and the argillization feature is arranged, can not satisfy the requirement of strength of the filling roadbed material of the cubic meter of stone of roadbed regulation and stipulation.But if the cubic metre of earth and stone of excavation section is thrown aside, and it is filling roadbed far to transport other fillers, and then Quan Xian engineering cost increases greatly, and the side of abandoning takies a large amount of soils, is unfavorable for environmental protection.Therefore, seek argillaceous siltstoue, mud stone practicality and operability, and comparatively perfect constructure scheme and detection method has very important practical sense as roadbed filling by research.
Guarantee to utilize the long-time stability of mud stone, the filling roadbed quality of argillaceous sandstone and roadbed, must handle following problem well: the first, solve mud stone, the disintegration of argillaceous sandstone chance water, particle diameter diminishes suddenly, causes the intensity of roadbed and stability to reduce; The second, improve the degree of compaction of roadbed, reduce the void content of roadbed filling, effectively limit the generation of roadbed settlement after the disintegration of mud stone particle, improve the roadbed bulk strength; The 3rd, take roadbed sealing measure, prevent that rainwater from entering the secondary disintegration that causes mud stone, softening, causes sinking, the slippage of roadbed.For overcoming the above problems, existing technical scheme is: filling roadbed mud stone is sprinkled water outside the venue, and pre-disintegration is handled, and dwindles its particle diameter.For reducing the porosity of roadbed filling, improve the compactness of roadbed, the volume fraction by 25% in the earth-rock mixture material mixes the powder fine sand.But this method engineering time is longer, and expense is higher, and is not too economical.
Summary of the invention
The problem to be solved in the present invention is: a kind of mud stone and argillaceous sandstone, the duration is short, expense is low filling roadbed forced ramming construction method of making full use of is provided
Technical scheme of the present invention:
A kind of job practices of mud stone railway embankment using may further comprise the steps,
(1) roadbed leveling: carry out the construction of roadbed viscosity bound edge soil by the normal soil roadbed construction method, roll, in the rock-filling embankment scope, carry out filler then, filler is that mud stone and argillaceous sandstone mix and fill out, packing material size is not more than 50cm, filler is shakeout, and shakeouing the back virtual resurfacing thickness is 0.8-1.1 rice, uses the bulldozer leveling then;
(2) arrange tamping point: the place subscript after leveling is established tamping point, presses equilateral triangle apart from the level tamping point below the roadbed end face 2.0m and arranges, about requiring stagger in the position of two-layer tamping point, guarantees the centre of the tamping point of the second layer at the first floor tamping point; Push up the full tamping point layout of employing in 0.5 ~ 2.0m scope apart from roadbed, and tamping point coincidence area is not less than 1/3;
(3) dynamic consolidation construction: aim at tamping point with dynamic compaction machinery and carry out dynamic consolidation construction; Strong ram finish after, after check ramming volume, heavy dynamic penetration value and ground roll velocity of wave are qualified, the filling of following one deck roadbed; The strong rammer of cut and fill roadbed begins to ram to the roadbed middle part by row from the shoulder; Fill out the strong rammer that digs the boundary roadbed, dig boundary line with far, dig boundary line and ram to filling out by row from the shoulder from filling out;
(4) compacting of shaking by force: ram finish after, it is flat to use bulldozer to push away, and uses the vibratory roller compacting of shaking by force then.
Described mud stone is calcic mud stone or shale, and wherein clay mineral content 70% ~ 80%, calcareous calcite content 10% ~ 20%, irony content 5% ~ 10%, quartz content＜5%;
Described mud stone is a chiltern calcic mud stone, and wherein clay mineral content 60% ~ 70%, calcareous calcite content 10% ~ 20%, irony 5% ~ 10%, quartz content 13% ~ 15%.
Described argillaceous sandstone is a crag, quartz content 30%-40% wherein, calcareous calcite content 40%-50%, mud and iron tramp 20-30%.
Described ramming volume is rammed average ramming volume by final twice and is not more than 3.5cm, or rams the standard that the settling amount sum is not more than 12cm for three times and control at last, and ram energy is 1000kN.m at every turn.
Described heavy dynamic penetration value is that N is counted in the required hammering of every injection 10.0cm
63.5Be 10＜N
63.5≤ 20; Described ground roll velocity of wave V
RGreater than 225m/s.
The present invention rams processing by force with mud stone is filling roadbed, reasonable Arrangement tamping point and ram number, utilize the strong shock wave and the dynamic stress that are produced of ramming in soil, to propagate, make catalase become more granule, and make particle produce the relative motion of moment, gas in the soil body hole is discharged rapidly or compression, and voids volume reduces, thereby makes subgrade soils form more closely knit structure.
Positive beneficial effect of the present invention:
(1) the filling roadbed dynamic compaction method of mud stone of the present invention is compared with the common sand method of mixing, and advantage is obvious.It is less that strong rammer is handled the construction machinery that needs, and method is simple relatively.From the engineering time, hit as ramming several 7 ~ 9 in every, a crawler crane per hour can ram 40 ~ 45 and hit, and the strong rammer of every 2h can be handled 100m
2Roadbed, the construction period is significantly shorter than mixes the sand construction.
(2) dynamic compaction method of the present invention is comparatively economical, is radix with Ji Shao speedway JSTJ-07 mark roadbed embankment contract price, and mixing the every side of sand scheme increases by 28.7 yuan of the peace expenses of building, and the rammer scheme increases by 24.69 yuan by the every side of empty shop 1m thickness by force.Find out that thus the every side of the scheme of ramming by force saves 4 yuan than mixing the sand scheme.From the filler utilization, ram processing section requirement particle diameter by force and be not more than 50cm in addition, and mix the sand section or general subgrade requirement particle diameter is not more than 20cm, improved the utilization rate of excavation, reduced the expense that rock that explosion is come out carries out second-time breakage.
(3) method of the present invention has been applied on Ji Shao speedway, route total length 59.7Km, and by mountain ridge hilling terrain 4 track speedway type design, width of subgrade 24.5m, design speed 80km/h.6,570,000 sides of roadbed embankment completely, wherein 2,170,000 sides utilize the excavation section cubic metre of earth and stone to carry out the cut-fill transition railway embankment using, have avoided operation that the excavation section cubic metre of earth and stone is transported outward, and this highway of only this item is just saved about 8,000 ten thousand yuan of engineering costs.Ji Shao speedway was open to traffic in December, 2008, and evenness of road surface so far is intact, and it is comfortable to drive a vehicle, no bumping at bridge-head phenomenon, and workmanship is good.
(4) the present invention fills out the embankment problem for solution mud stone, argillaceous sandstone mix a kind of constructure scheme preferably is provided, changed think in the past mud stone, argillaceous sandstone should not be as the understanding of embankment filling material, construction has very important guiding value and practical value to the speedway of this class geological conditions in the present invention.
The specific embodiment
Embodiment 1: the job practices of mud stone railway embankment using
1, filling roadbed rock is formed and the mechanical characteristics detection:
For understanding Ji Shao high speed project, understand filling roadbed rock constituent and mechanical characteristics, the JSTJ-07 contract section at place, test section is sampled, its typical sample is carried out petrochemistry composition and physical mechanics test.
Table 1: the physical mechanics test tables of data of indoor rock
Rock-mineral determination result following (weight %):
Sample I: blushing calcic mud stone (or shale), clay mineral content〉70%, calcareous (calcite) content 10% ~ 20%, irony 5% ~ 10%, quartzy (chip) content＜5%.
Sample II: blushing aleuritic texture calcic mud stone, clay mineral content〉60%, calcareous (calcite) content 10% ~ 20%, irony〉5%, quartzy (chip) content about 15%.
Sample III: taupe silty mud limestone, quartzy (chip) content〉30%, calcareous (calcite) content〉40%, other (mud, iron tramp) 20-30%, accidental white clouds master slice (chip).
2, construction machinery
(1) land leveller PY160 (2) vibratory roller XSM220 (3) bulldozer T140
(4) sprinkling truck (5) loader ZL50 (6) projection vibratory roller YZK18JC,
(7) dynamic compaction machinery
Wherein vibratory roller XSM220 performance is as follows:
Work quality 20T, dead line load 435N/cm, vibration frequency 28Hz, nominal amplitude 2.0/1.1mm,
Exciting force 350/200kN.
Projection vibratory roller YZK18JC performance is as follows:
Work quality 18T, dead line load 390N/cm, vibration frequency 28Hz, nominal amplitude 2.0/1.1mm,
Exciting force 330/190kN.
3, fill concrete steps:
(1) roadbed leveling
The construction width is the roadbed viscosity bound edge soil of 2m earlier, its construction technology is with normal soil roadbed filled-up ground, treat bound edge soil finish roll qualified after, grid at rock-filling embankment scope inside-paint 6m * 5m carries out material loading, and filler is that mud stone and argillaceous siltstoue mix and fill out, and packing material size is not more than 50cm, filler is shakeout, shakeout the back virtual resurfacing thickness and be about 1m, just flat back repaves the thick river of 10cm sand at filler, uses bulldozer T140 leveling.
(2) tamping point is arranged
Coordinate with a certain fixedly pile No. on the roadbed is the control point, establish tamping point at the place subscript that leveling is good, arrange that by the equilateral triangle of length of side 3m bilevel tamping point is answered staggered positions apart from the level below the roadbed end face 2.0m, guarantee that the tamping point of the second layer is arranged in the centre of first floor tamping point; Be abound with tamping point apart from the 0.5 ~ 2.0m employing of roadbed top, and tamping point coincidence area is not less than 1/3.
(3) dynamic consolidation construction
Dynamic compaction machinery is in place, and hammer ram is aimed at the tamping point position, and hammer ram lifts by crane predetermined altitude, treats hammer ram unhook back free-falling, rams by force; Mobile then dynamic compaction machinery is rammed to next tamping point.Strong ram finish after, after check ramming volume, heavy dynamic penetration value and ground roll velocity of wave are qualified, the filling of following one deck roadbed;
The strong rammer of cut and fill roadbed should begin from the shoulder to ram to the roadbed middle part by row; Fill out the strong rammer that digs the boundary roadbed, should dig boundary line with far, dig boundary line and ram to filling out by row from the shoulder from filling out.
Ram requirement: hit average ramming volume by final 2 and be not more than 3.5cm, or last 3 hit the standard that the settling amount sum is not more than 12cm and control ramming number, ram energy is 1000kN.m at every turn.
The heavy dynamic penetration value is that N is counted in the required hammering of every injection 10.0cm
63.5Greater than 10 times.
Ground roll velocity of wave V
RGreater than 225m/s, hard court soil requirement in reaching.
(4) ram finish after, it is flat to use bulldozer to push away, and uses the 6 times compactings of shaking by force of XSM220 type vibratory roller then.
3, test detects
Adopt at test section that relative settlement is poor, solid volume rate and heavy cone dynamic sounding detect respectively.
(1) relative settlement method
On the embankment after the compacting, adopt the XSM220 vibratory roller, roll twice back and forth with the speed of 2 ~ 4km/h, detect measuring point elevation before and after rolling with level gauge, require depth displacement to be not more than 5mm.
(2) solid volume rate
The method of inspection of solid volume rate comes from the detection of calking rubble compactness, the percentage of the solid volume rate=solid volume/hole volume of testing.
The method of inspection: digging out diameter at measuring point is testing pits of 80cm, and the degree of depth of testing pits is a compacted depth, water filling behind the middle berth plastic foil of hole, and record water filling quality also is converted into volume, and the filler that digs out adopts drainage to measure volume, just can obtain the solid volume rate.In the strong section of ramming, by compacting thickness, per 20 ~ 30cm surveys one deck solid volume rate, to estimate ramming effect by force with the variation of filling layer depth.
Table 2: the solid volume rate of dynamic compaction test
(3) heavy cone dynamic sounding
The test method of heavy cone dynamic sounding: hammer quality 63.5kg, fall apart from 76.0cm, speed is 15 ~ 30 to hit/min, writes down the required hammering of every injection 10.0cm and counts N
63.5, as the feeler inspection index.
Strictness is squeezed into 10.0cm in the soil by test method is first with circular cone, and the hammering number that writes down every injection 10.0cm then is as the feeler inspection index, and injection is always arrived till following one deck end face.The punching hammer is freely fallen along drilling rod, and sounding rod maximum deflection degree should not surpass 2%, squeezes into hammering as far as possible continuously in the process, prevents that simultaneously hammering off-centre, feeler lever from tilting and side direction is rocked, and keeps the feeler lever verticality.
Table 3: heavy N63.5 dynamic sounding testing result
Table 4: feeler inspection number of times and gravelly soil compactness relation
From table 3, table 4 as can be known, close degree during a strong rammer section roadbed compactness all can reach substantially.
Claims (7)
1. the job practices of a mud stone railway embankment using, it is characterized in that: this method may further comprise the steps,
(1) roadbed leveling: carry out the construction of roadbed viscosity bound edge soil by the normal soil roadbed construction method, roll, in the rock-filling embankment scope, carry out filler then, filler is that mud stone and argillaceous sandstone mix and fill out, packing material size is not more than 50cm, filler is shakeout, and shakeouing the back virtual resurfacing thickness is 0.8-1.1 rice, uses the bulldozer leveling then;
(2) arrange tamping point: the place subscript after leveling is established tamping point, presses equilateral triangle apart from the level tamping point below the roadbed end face 2.0m and arranges, about requiring stagger in the position of two-layer tamping point, guarantees the centre of the tamping point of the second layer at the first floor tamping point; Push up the full tamping point layout of employing in 0.5 ~ 2.0m scope apart from roadbed, and tamping point coincidence area is not less than 1/3;
(3) dynamic consolidation construction: aim at tamping point with dynamic compaction machinery and carry out dynamic consolidation construction; Strong ram finish after, after check ramming volume, heavy dynamic penetration value and ground roll velocity of wave are qualified, the filling of following one deck roadbed; The strong rammer of cut and fill roadbed begins to ram to the roadbed middle part by row from the shoulder; Fill out the strong rammer that digs the boundary roadbed, dig boundary line with far, dig boundary line and ram to filling out by row from the shoulder from filling out;
(4) compacting of shaking by force: ram finish after, it is flat to use bulldozer to push away, and uses the vibratory roller compacting of shaking by force then.
2. job practices according to claim 1 is characterized in that: described mud stone is calcic mud stone or shale, and wherein clay mineral content 70% ~ 80%, calcareous calcite content 10% ~ 20%, irony content 5% ~ 10%, quartz content＜5%.
3. job practices according to claim 1 is characterized in that: described mud stone is a chiltern calcic mud stone, and wherein clay mineral content 60% ~ 70%, calcareous calcite content 10% ~ 20%, irony 5% ~ 10%, quartz content 13% ~ 15%.
4. job practices according to claim 1 is characterized in that: described argillaceous sandstone is a crag, quartz content 30%-40% wherein, calcareous calcite content 40%-50%, mud and iron tramp 20-30%.
5. job practices according to claim 1 is characterized in that: described ramming volume is rammed average ramming volume by final twice and is not more than 3.5cm, or rams the standard that the settling amount sum is not more than 12cm for three times and control at last, and ram energy is 1000kN.m at every turn.
6. job practices according to claim 1 is characterized in that: described heavy dynamic penetration value is that N is counted in the required hammering of every injection 10.0cm
63.5Be 10＜N
63.5≤ 20.
7. job practices according to claim 1 is characterized in that: described ground roll velocity of wave V
RGreater than 225m/s.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276649A (en) * | 2013-06-21 | 2013-09-04 | 云南云岭高速公路桥梁工程有限公司 | Method for constructing multi-thickness rockfill embankment with lateral confinement and layering functions |
| CN103778325A (en) * | 2014-01-08 | 2014-05-07 | 南宁市界围工程咨询有限公司 | Subgrade earthwork allocation method |
| CN111622202A (en) * | 2020-05-19 | 2020-09-04 | 民航机场规划设计研究总院有限公司 | Method for filling and detecting boulder by dynamic compaction |
| CN112697572A (en) * | 2020-12-18 | 2021-04-23 | 浙江华东工程咨询有限公司 | Indoor test method suitable for argillaceous siltstone crushing |
| CN113265924A (en) * | 2021-05-27 | 2021-08-17 | 中交基础设施养护集团有限公司 | Construction method for using red bed mudstone blocks as high-fill dynamic compaction roadbed filling |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276649A (en) * | 2013-06-21 | 2013-09-04 | 云南云岭高速公路桥梁工程有限公司 | Method for constructing multi-thickness rockfill embankment with lateral confinement and layering functions |
| CN103276649B (en) * | 2013-06-21 | 2015-09-09 | 云南云岭高速公路建设集团有限公司 | Side is had to limit layering many thickness Stone Filled Embankment construction method |
| CN103778325A (en) * | 2014-01-08 | 2014-05-07 | 南宁市界围工程咨询有限公司 | Subgrade earthwork allocation method |
| CN103778325B (en) * | 2014-01-08 | 2017-01-04 | 广西界围信息科技有限公司 | A kind of earth work concocting method |
| CN111622202A (en) * | 2020-05-19 | 2020-09-04 | 民航机场规划设计研究总院有限公司 | Method for filling and detecting boulder by dynamic compaction |
| CN112697572A (en) * | 2020-12-18 | 2021-04-23 | 浙江华东工程咨询有限公司 | Indoor test method suitable for argillaceous siltstone crushing |
| CN112697572B (en) * | 2020-12-18 | 2023-08-29 | 浙江华东工程咨询有限公司 | Indoor test method suitable for crushing argillaceous siltstone |
| CN113265924A (en) * | 2021-05-27 | 2021-08-17 | 中交基础设施养护集团有限公司 | Construction method for using red bed mudstone blocks as high-fill dynamic compaction roadbed filling |
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Application publication date: 20110427 |