CN101024934A - Construction method for railway and road foundation - Google Patents
Construction method for railway and road foundation Download PDFInfo
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- CN101024934A CN101024934A CN 200710056874 CN200710056874A CN101024934A CN 101024934 A CN101024934 A CN 101024934A CN 200710056874 CN200710056874 CN 200710056874 CN 200710056874 A CN200710056874 A CN 200710056874A CN 101024934 A CN101024934 A CN 101024934A
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Abstract
The invention belongs to a constructing method for railway and road bed processing, characterized in that: it comprises the concrete steps of: cleaning road surface; uniformly mixing calcium-added bentonite in the excavated wet mud and laying the calcium-added bentonite, where the utilization in volumetric percent: when the water ratio of the foundation soil is 30% and the bearing capacity of the finished product is 12ton/m2, the ratio of calcium-added bentonite to soil = 0.5:1; when the bearing capacity is invariant and the water ratio is reduced by 5%, the utilization of calcium-added bentonite is reduced by 10% and otherwise increased by 20%; mixing and airing; rolling; leveling and rolling. And its beneficial effects: it can quickly solidify the high-water content and fine-grained soil; it can quickly construct soft road beds; it can improve the bearing capacity of the finished road bed; it can slow down road bed settlement.
Description
Technical field
The invention belongs to the method that soft foundation is handled, relate in particular to a kind of job practices that is used for railway and highway subgrade processing.
Background technology
The bearing capacity lower (having only 6 tons/square metre usually) of (land) ground owing to reclaim fields from the sea, water content is bigger.The bearing capacity that the sea level, Bohai Sea Gulf reduces the land that forms is also lower, and soil property is pine, and water content is also bigger.Improving the soft foundation bearing capacity and slow down foundation settlement, is the construction Difficulties that coastal railway and highway subgrade are handled.It is the method for mud agitation pile of fetching water that the weak roadbed of existing railway is handled job practices, and the cost of this method is higher, and every square metre reaches 1500 yuan, and roadbed maintenance cost is also than higher.The method that existing highway soft foundation is handled is that the construction cost of this method and maintenance cost are all very high with pseudo-ginseng ash compacting.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned job practices and technology, and a kind of job practices that is used for railway and highway subgrade processing is provided, reach and reduce construction and maintenance cost and improve bearing capacity and the purpose of slowing down sedimentation.
The present invention for achieving the above object, by the following technical solutions: a kind ofly be used for the job practices that railway and highway subgrade are handled, it is characterized in that:
Concrete construction sequence is:
1, levels the route surface: level with bulldozer, in the scope of width technical requirements, reach plane effect;
2, shop calcium-enriched alta-mud: with transport vehicle and the excavator calcium-enriched alta-mud that evenly paves on route, mix calcium-enriched alta-mud thoroughly in the wet mud that digs out, the consumption percent by volume is: when the moisture content of ground soil is 30%, and 12 tons/meter of requirement for bearing capacity of finished product
2The time, the ratio of calcium-enriched alta-mud and soil is 0.5: 1; When requirement for bearing capacity is constant, the every reduction by 5% of soil moisture content, the use amount of calcium-enriched alta-mud reduces by 10%, the every increase by 5% of soil moisture content, the use amount of calcium-enriched alta-mud increases by 20%;
3, mix airing: along route ground is slotted with excavator, wet mud is dug out in the depth index requirement and calcium-enriched alta-mud is mixed thoroughly together by handling, and is deposited in airing beyond the route sideline, whenever turn over one time, airing 3-5 days, reach the numerical value of standard-required until water content, simultaneously, the bottom of airing groove;
4, roll: good compound is inserted the roadbed to get airing with excavator from the airing mound, successively rolls 0.4 meter-0.5 meter of the thickness of every rolling layers with 18 tons of road rollers that shake.Successively measure compactness;
5, reinforce: when being lower than 0.7 meter of absolute altitude, the brick dregs is inserted roadbed, the thickness of brick dregs is 0.5 meter, rolls with 18 tons of road rollers that shake, and inserts compound more thereon and rolls, up to reaching the absolute altitude requirement again;
6, smooth: as after roadbed reaches design altitude, to carry out smooth rolling again to meeting technical requirements;
7, finished product protection: at finished product the gutter is set along the line, prevents the ponding that rains, the protection finished product;
8, check: test by checking and accepting technical requirements,, measure the bearing capacity of foundation soil after tedding for example by plate.
Beneficial effect of the present invention: this method has been determined the proportionate relationship when the moisture content of subgrade soil and requirement for bearing capacity of finished product one timing calcium-enriched alta-mud and wet mud; The thickness of rolling layers; Effective construction machinery and engineering time and a whole set of ted the program of construction.Can make the soil quick-hardening that water content is big, particle is thin, reduce roadbed treatment project cost; Can make weak roadbed rapid construction, shorten the construction period; Can make the fine soil particle in the finished product ground obtain gluing, improve the bearing capacity of finished product ground; Can make subgrade soil have water imbibition, water retention, stretch-draw active force, play suction, water conservation, resistance and returned the effect of water and selfreparing, and then reached the purpose of slowing down subgrade settlement because of forming special colloid.
The specific embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with preferable case study on implementation.
A kind of job practices that is used for railway and highway subgrade processing, concrete construction sequence is:
1, levels the route surface: remove the foreign material on route surface with bulldozer, make it to reach smooth;
2, shop calcium-enriched alta-mud: with transport vehicle and the excavator calcium-enriched alta-mud that on route, evenly paves, the consumption of shop calcium-enriched alta-mud is: according to the moisture content height of soil and the requirement of bearing capacity of finished product, determine the consumption of calcium-enriched alta-mud, generally, when the moisture content of ground soil is about 30%, 12 tons/meter of requirement for bearing capacity of finished product
2The time, calcium-enriched alta-mud (cubic meter) is 0.5: 1 with the ratio of soil (cubic meter).When requirement for bearing capacity was constant, when the moisture content of soil is the boundary with 30%, during every reduction by 5%, the use amount of calcium-enriched alta-mud reduced by 10%, when the moisture content of soil is higher than 30%, and every increase by 5%, the use amount of calcium-enriched alta-mud increases by 20%;
3, mix airing: along route ground is slotted with excavator, wet mud is dug out in the depth index requirement and calcium-enriched alta-mud is mixed thoroughly together by handling, be deposited in airing beyond the route sideline, whenever turn over airing 3 days to 5 days one time, reach the numerical value of standard-required until water content, simultaneously, the bottom of airing groove;
4, roll: good compound is inserted the roadbed to get airing with excavator from the airing mound, successively rolls 0.4 meter to 0.5 meter of the thickness of every rolling layers with 18 tons of road rollers that shake.Successively measure compactness;
5, reinforce: when being lower than 0.7 meter of absolute altitude, the brick dregs is inserted roadbed, the thickness of brick dregs is 0.5 meter, rolls with 18 tons of road rollers that shake, and inserts compound more thereon and rolls, up to reaching the absolute altitude requirement again;
6, smooth: as after roadbed reaches design altitude, to carry out smooth rolling again to meeting technical requirements;
7, finished product protection: at finished product the gutter is set along the line, prevents the ponding that rains, the protection finished product;
8, check: test by checking and accepting technical requirements,, measure the bearing capacity of foundation soil after tedding for example by plate.
Instantiation: application site is that Harbor, Tianjin industrial occupancy Tianjin Caustic Soda Plant special purpose railroad roadbed is handled (23 bid section) engineering.Unit in charge of construction is Baotai Construction Co., Ltd., Tianjin, and the check unit is a ground foundation Engineering Co., Ltd of Tianjin section, and inspection unit is Construction Development Co. Ltd., Tianjin Lingang Industrial Zone.
This method has been determined the proportionate relationship when the moisture content of subgrade soil and requirement for bearing capacity of finished product one timing calcium-enriched alta-mud and wet mud; The thickness of rolling layers; Effective construction machinery and engineering time and a whole set of ted the program of construction.Can make the soil quick-hardening that water content is big, particle is thin, reduce roadbed treatment project cost; Can make weak roadbed rapid construction, shorten the construction period; Can make the fine soil particle in the finished product ground obtain gluing, improve the bearing capacity of finished product ground; Can make subgrade soil have water imbibition, water retention, stretch-draw active force, play suction, water conservation, resistance and returned the effect of water and selfreparing, and then reached the purpose of slowing down subgrade settlement because of forming special colloid.
The above only is a preferable case study on implementation of the present invention, is not that structure of the present invention is done any pro forma restriction.Every foundation technical spirit of the present invention all still belongs to the scope of technical scheme of the present invention to any simple modification, equivalent variations and modification that above embodiment did.
Claims (1)
1, a kind of job practices that is used for railway and highway subgrade processing, it is characterized in that: concrete construction sequence is:
(1), levels the route surface;
(2), the shop calcium-enriched alta-mud: with transport vehicle and the excavator calcium-enriched alta-mud that evenly paves on route, mix calcium-enriched alta-mud thoroughly in the wet mud that digs out, the consumption percent by volume is: when the moisture content of ground soil is 30%, 12 tons/meter of requirement for bearing capacity of finished product
2The time, calcium-enriched alta-mud: soil=0.5: 1; When requirement for bearing capacity was constant, during the every reduction by 5% of soil moisture content, the use amount of calcium-enriched alta-mud reduced by 10%, the every increase by 5% of soil moisture content, and the use amount of calcium-enriched alta-mud increases by 20%;
(3), mix airing: along route ground is slotted with excavator, dig out wet mud and calcium-enriched alta-mud and mix thoroughly together, be deposited in airing beyond the route sideline, whenever turn over a time, airing 3-5 days, reach the numerical value of standard-required, the bottom of the groove of airing simultaneously until water content;
(4), roll: good compound is inserted the roadbed to get airing with excavator from the airing mound, successively rolls with road roller, and 0.4 meter-0.5 meter of the thickness of rolling layers is also successively measured compactness;
(5), again reinforce: when being lower than 0.7 meter of absolute altitude, the brick dregs is inserted roadbed, the thickness of brick dregs is 0.5 meter, and steamroller is inserted compound more thereon and rolled;
(6), smooth, roll to meeting technical requirements;
(7), finished product protection: the gutter is set along the line at finished product;
(8), check.
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CN 200710056874 CN101024934A (en) | 2007-03-06 | 2007-03-06 | Construction method for railway and road foundation |
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CN 200710056874 CN101024934A (en) | 2007-03-06 | 2007-03-06 | Construction method for railway and road foundation |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102116007A (en) * | 2011-03-02 | 2011-07-06 | 江苏省淮安市公路管理处 | Isolation waterproof filling method for treating surface layer of highway foundation |
CN102127890A (en) * | 2011-03-31 | 2011-07-20 | 湖南恒盾岩土工程注浆科技有限公司 | Reinforcing construction method of existing railway subgrade |
CN102828453A (en) * | 2012-09-17 | 2012-12-19 | 武卫国 | Stamping reinforcement method of weak rolling area of roadbed and application thereof |
CN102900001A (en) * | 2012-10-22 | 2013-01-30 | 中国水电建设集团路桥工程有限公司 | Construction method for road foundation |
CN103031792A (en) * | 2013-01-05 | 2013-04-10 | 北京航空航天大学 | Method and device for lifting roadbed settlement of existing road |
CN109137692A (en) * | 2017-06-13 | 2019-01-04 | 新疆北方建设集团有限公司 | A kind of gobi roadbed salt marsh chemical treatment construction |
CN109706810A (en) * | 2018-11-29 | 2019-05-03 | 华东交通大学 | A kind of highway bed construction method that swelled ground fills |
CN111676749A (en) * | 2020-06-03 | 2020-09-18 | 安徽华仁路桥工程有限公司 | Construction method for roadbed earthwork in rainy season |
CN111823387A (en) * | 2020-07-17 | 2020-10-27 | 深圳市建安(集团)股份有限公司 | A kind of residual mud and slag modification device and method |
CN112176804A (en) * | 2020-10-12 | 2021-01-05 | 东南大学 | Anti-settlement water retention roadbed structure in water-rich soft soil area and design method |
CN113322720A (en) * | 2021-05-18 | 2021-08-31 | 中铁二院工程集团有限责任公司 | Roadbed structure suitable for heavy haul railway in south Asia region |
-
2007
- 2007-03-06 CN CN 200710056874 patent/CN101024934A/en active Pending
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102116007A (en) * | 2011-03-02 | 2011-07-06 | 江苏省淮安市公路管理处 | Isolation waterproof filling method for treating surface layer of highway foundation |
CN102116007B (en) * | 2011-03-02 | 2012-05-30 | 江苏省淮安市公路管理处 | Isolation Waterproof Filling Method for Highway Foundation Surface Treatment |
CN102127890A (en) * | 2011-03-31 | 2011-07-20 | 湖南恒盾岩土工程注浆科技有限公司 | Reinforcing construction method of existing railway subgrade |
CN102828453A (en) * | 2012-09-17 | 2012-12-19 | 武卫国 | Stamping reinforcement method of weak rolling area of roadbed and application thereof |
CN102900001A (en) * | 2012-10-22 | 2013-01-30 | 中国水电建设集团路桥工程有限公司 | Construction method for road foundation |
CN102900001B (en) * | 2012-10-22 | 2015-04-29 | 中国水电建设集团路桥工程有限公司 | Construction method for road foundation |
CN103031792A (en) * | 2013-01-05 | 2013-04-10 | 北京航空航天大学 | Method and device for lifting roadbed settlement of existing road |
CN103031792B (en) * | 2013-01-05 | 2015-09-02 | 北京航空航天大学 | The method of the existing highway subgrade sedimentation of a kind of lifting and device thereof |
CN109137692A (en) * | 2017-06-13 | 2019-01-04 | 新疆北方建设集团有限公司 | A kind of gobi roadbed salt marsh chemical treatment construction |
CN109706810A (en) * | 2018-11-29 | 2019-05-03 | 华东交通大学 | A kind of highway bed construction method that swelled ground fills |
CN109706810B (en) * | 2018-11-29 | 2023-03-24 | 华东交通大学 | Construction method of highway subgrade filled with expansive soil |
CN111676749A (en) * | 2020-06-03 | 2020-09-18 | 安徽华仁路桥工程有限公司 | Construction method for roadbed earthwork in rainy season |
CN111676749B (en) * | 2020-06-03 | 2021-10-01 | 安徽华仁路桥工程有限公司 | Roadbed earthwork construction structure in rainy season |
CN111823387A (en) * | 2020-07-17 | 2020-10-27 | 深圳市建安(集团)股份有限公司 | A kind of residual mud and slag modification device and method |
CN112176804A (en) * | 2020-10-12 | 2021-01-05 | 东南大学 | Anti-settlement water retention roadbed structure in water-rich soft soil area and design method |
CN112176804B (en) * | 2020-10-12 | 2022-03-01 | 东南大学 | Anti-settlement water retention roadbed structure in water-rich soft soil area and design method |
CN113322720A (en) * | 2021-05-18 | 2021-08-31 | 中铁二院工程集团有限责任公司 | Roadbed structure suitable for heavy haul railway in south Asia region |
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