CN103467038A - Foam lightweight soil high-speed rail roadbed - Google Patents
Foam lightweight soil high-speed rail roadbed Download PDFInfo
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- CN103467038A CN103467038A CN2013103907872A CN201310390787A CN103467038A CN 103467038 A CN103467038 A CN 103467038A CN 2013103907872 A CN2013103907872 A CN 2013103907872A CN 201310390787 A CN201310390787 A CN 201310390787A CN 103467038 A CN103467038 A CN 103467038A
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Abstract
The invention discloses a foam lightweight soil high-speed rail roadbed. The foam lightweight soil high-speed rail roadbed is characterized in that the part of the roadbed, 0-1.0m under the roadbed top, is poured by foam lightweight soil with bubble rate being 66.6%, the foam lightweight soil per cubic meter is formed by mixing 343kg of cement and 223kg of water with a foaming agent and then foaming, and the construction wet density is 570kg/m<3>-600kg/m<3>; the part of the roadbed, more than 1.0m under the roadbed top, is poured by foam lightweight soil with bubble rate being 69.6%, the foam lightweight soil per cubic meter is formed by mixing 312kg of cement and 203kg of water with the foaming agent and then foaming, and the construction wet density is 550kg/m<3>-570kg/m<3>. The foam lightweight soil high-speed rail roadbed has high strength and stable performance, is not easy to settle and deform, and can guarantee a high speed train to run smoothly and steadily and safely and reduce the maintenance cost in the operation period in the future.
Description
Technical field
The invention belongs to the technical field of building operation, relate in particular to a kind of light-weight foamed native high ferro roadbed, adopt intensity light-weight foamed soil high, that wet density is good to build and form, can guarantee light-weight foamed earth roadbed intensity and monolithic stability after moulding.
Background technology
China has promoted the climax of railway construction in recent years, more than within nearly ten years, China railways will be built Line for Passenger Transportation 1.2 ten thousand km, and will, to 20,000 km both wired Speed Increased Reformed of carrying out speed per hour 200km, promote the construction of many large-scale stations or super-huge station simultaneously.And the train high-speed cruising has very high requirement to the ride comfort of track, otherwise high-speed cruising just can not be realized.Roadbed is the basis of track, therefore to the smooth-going, stable of roadbed, also strict restriction must be arranged.
Rail track is comprised of foundation structure thing (bridge, tunnel, roadbed etc.) and the track structure of different characteristics, and they interact, interdependence, jointly form a combination foundation circuit.The foundation structure thing is divided into again the cast-in-place structural basis and fills architecture basics, the cast-in-place structural basis is the railway span river, the bridge that intermountain etc. must arrange, the structures such as tunnel, filling architecture basics is generally and fills graded broken stone or the graded sand gravel mixes a certain amount of cement, fill the railway bed that the AB material waits design form, these two kinds different foundation structure things are in intensity, rigidity, distortion, there is very large difference the aspects such as material, easily cause non-uniform settling, the diseases such as distortion, while causing train to pass through basic intersection, the track structure generation is impacted, make again conversely train produce large vibration, cause the train operation worsening condition, vehicle, the track structure life-span reduces, affect the steady and security problems of bullet train operation.Therefore need that a kind of intensity is high, the roadbed embankment material of stable performance makes that basis substitutes or Part Substitution (basement transition stage is set) fills the structure roadbed, guarantee the current safety of bullet train, and reduce the maintenance cost during operation in the future, accomplish to put things right once and for all.
Summary of the invention
The object of the present invention is to provide a kind of light-weight foamed native high ferro roadbed, adopt intensity light-weight foamed soil high, that wet density is good to build and form.Light-weight foamed soil formula is configured according to high ferro subgrade rating characteristics and designing technique index request, by tests such as flow valuve, froth breaking and ultimate compression strength, checks, and can meet the demands fully.
In order to realize above-mentioned technical purpose, the present invention has adopted following technical scheme:
A kind of light-weight foamed native high ferro roadbed, it is characterized in that, roadbed pushes up downward 0～1.0m, by the light-weight foamed soil of bubble rate 66.6%, is built and is formed, the light-weight foamed soil of every cubic metre is formed by 343kg cement and 223kg water and whipping agent mixed foaming, and the construction wet density is 570kg/m
3～600kg/m
3; More than roadbed pushes up downward 1.0m, by the light-weight foamed soil of bubble rate 69.6%, built and formed, the light-weight foamed native 312kg cement 203kg water of every cubic metre and whipping agent mixed foaming form, and the construction wet density is 550kg/m
3～570kg/m
3.
Roadbed pushes up downward 0～1.0m, and subgrade strength is more than 1.0MPa; More than roadbed pushes up downward 1.0m, subgrade strength is more than 0.8MPa.
Described cement preference is composite Portland cement, and the presetting period is greater than 45 minutes, and final setting time is less than 10 hours.The hard tower board PC32.5 composite Portland cement that for example Zhijiang River, Zhejiang Province Cement Co., Ltd is produced.Whipping agent selects that bleeding rate is low, the wet density increment rate is low, can guarantee that the light-weight foamed soil property amount prepared is stable, evenly.For example the SRTJ-A type whipping agent that auspicious civil engineering development in science and technology company limited produces is contained in Guangdong.
Described light-weight foamed native flow valuve is 160～180mm, can give full play to cast-in-place foamed light soils good fluidity, has met the requirement of construction pumping.
The acid-basicity of described water is neutral.
The present invention is in conjunction with the construction characteristic of high ferro roadbed, and clear and definite different depths roadbed adopts different light-weight foamed soil to build.Take from the downward 1m of roadbed end face is boundary, and the roadbed of 0～1.0m is built and formed by the light-weight foamed soil of bubble rate 66.6%; 1.0m above roadbed is built and is formed by the light-weight foamed soil of bubble rate 69.6%.
Light-weight foamed native high ferro roadbed technical indicator is:
(1) wet density index:
| From end face distance (m) | Construction wet density R fw(kg/m 3) |
| 0～1.0 | 600≥R fw≥570 |
| ＞1.0 | 570＞R fw≥550 |
(2) ultimate compression strength index:
(3) flow valuve: 160～180mm.
(4) the light-weight foamed native wet density increment rate of froth breaking test is no more than 10%.
The light-weight foamed native formulating of recipe of high ferro roadbed and raw material quality control are very strict, the formula of every block of roadbed light-weight foamed soil used is wanted strict conformance, newly mix light-weight foamed soil and must there is fabulous workability and cohesiveness, allow anything but to occur the phenomenon of laminated segregation.The starting material place of production must be unified, and cement used is used same batch of same producer as far as possible.
High ferro roadbed of the present invention, its light-weight foamed soil formula, component ratio is scientific and reasonable, its serviceability meets light-weight foamed native pumping and fills requirement, the advantages such as good mobility, stable antifoam performance, pumpability can be reached, light-weight foamed earth roadbed intensity and monolithic stability after moulding can be guaranteed.
Light-weight foamed native high ferro subgrade strength of the present invention is high, stable performance, and not free settling, distortion can guarantee the steady and safety of bullet train operation, and reduces the maintenance cost during operation in the future.
For further illustrating constructional feature of the present invention and effect, below in conjunction with accompanying drawing, the invention will be further described.
The accompanying drawing explanation
Fig. 1 is light-weight foamed native froth breaking trial curve figure.
Specific embodiment
Each component of the light-weight foamed soil of preparation high ferro roadbed is as follows:
(1), cement adopts the hard board tower P.C32.5 composite Portland cement that the Zhijiang River, Zhejiang Province Cement Co., Ltd is produced.Leading indicator: the presetting period must not be early than 45min, and final setting time must not be later than 10h, and fineness, time of coagulation, stability and intensity meet the national regulation requirement; Cement density is not less than 2700kg/m
3.
(2), main raw material(s) marches into the arena and must provide product certificate, answers the according to the form below requirement to test simultaneously.
(3), the whipping agent that adopts of foaming is that the SRTJ-A type whipping agent that auspicious civil engineering development in science and technology company limited produces is contained in Guangdong, has the characteristics such as bleeding rate is low, the wet density increment rate is low, guarantees that the light-weight foamed soil property amount prepared is stable, evenly.Whipping agent should meet following table and require:
The whipping agent technical indicator
| Performance index | Prescribed value |
| Dilution ratio | 40～60 |
| Expansion ratio | 800～1200 |
(4), the hydromining tap water, it is neutral that soda acid check is.
(5), the light-weight foamed soil formula of this high ferro roadbed is carried out to wet density, flow valuve and froth breaking test, when flow valuve meets the demands, froth breaking is when testing definite wet density increment rate and meeting the demands, produce test specimen and carry out maintenance and carry out compressive strength test.
(6), according to " cast-in-place foamed light soils technical regulation ", (CECS:2492008) first the PC32.5 cement adopted has been carried out to the froth breaking test, test-results as shown in Figure 1.
(7) again to aforementioned formula moulding ultimate compression strength result in the 7 day length of time as following table.
The formula strength trial is table as a result
Final table from the graph can find out that the light-weight foamed native flow valuve of high ferro roadbed, wet density and the ultimate compression strength of this formula mixing all meet high ferro roadbed technology and construction requirement.
Adopt above-mentioned light-weight foamed soil to build the high ferro roadbed, roadbed pushes up downward 0～1.0m, built and formed by the light-weight foamed soil of bubble rate 66.6%, the light-weight foamed soil of every cubic metre is formed by 343kg cement and 223kg water and whipping agent mixed foaming, and the construction wet density is 570kg/m
3～600kg/m
3.More than roadbed pushes up downward 1.0m, by the light-weight foamed soil of bubble rate 69.6%, built and formed, the light-weight foamed native 312kg cement of every cubic metre and 203kg water and whipping agent mixed foaming form, and the construction wet density is 550kg/m
3～570kg/m
3.
After testing, roadbed pushes up downward 0～1.0m to the light-weight foamed soil of high ferro roadbed of configuration, more than subgrade strength can reach 1.0MPa; More than roadbed pushes up downward 1.0m, more than subgrade strength can reach 0.8MPa.
Light-weight foamed native high ferro subgrade strength of the present invention is high, stable performance, and not free settling, distortion can guarantee the steady and safety of bullet train operation, and reduces the maintenance cost during operation in the future.
Claims (5)
1. a light-weight foamed native high ferro roadbed, it is characterized in that, roadbed pushes up downward 0～1.0m, build and form by the light-weight foamed soil of bubble rate 66.6%, the light-weight foamed soil of every cubic metre is formed by 343kg cement and 223kg water and whipping agent mixed foaming, and the construction wet density is 570kg/m3～600 kg/m3; More than roadbed pushes up downward 1.0m, by the light-weight foamed soil of bubble rate 69.6%, built and formed, the light-weight foamed soil of every cubic metre is formed by 312kg cement and 203kg water and whipping agent mixed foaming, and the construction wet density is 550kg/m3～570kg/m3.
2. light-weight foamed native high ferro roadbed according to claim 1, is characterized in that, roadbed pushes up downward 0～1.0m, and subgrade strength is more than 1.0MPa; More than roadbed pushes up downward 1.0m, subgrade strength is more than 0.8MPa.
3. light-weight foamed native high ferro roadbed according to claim 1, is characterized in that, described cement is composite Portland cement, and the presetting period is greater than 45 minutes, and final setting time is less than 10 hours.
4. light-weight foamed native high ferro roadbed according to claim 1, is characterized in that, described light-weight foamed native flow valuve is 160～180mm.
5. light-weight foamed native high ferro roadbed according to claim 1, is characterized in that, the acid-basicity of described water is neutral.
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| CN201310390787.2A CN103467038B (en) | 2013-08-30 | 2013-08-30 | A kind of Foam lightweight soil high ferro roadbed |
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| CN201310390787.2A CN103467038B (en) | 2013-08-30 | 2013-08-30 | A kind of Foam lightweight soil high ferro roadbed |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104961393A (en) * | 2015-06-11 | 2015-10-07 | 东南大学 | Quartz sand slag foamed light soil filling material for highway abutment backfill |
| CN105155383A (en) * | 2015-07-31 | 2015-12-16 | 中交二公局第三工程有限公司 | Construction process of bubble light soil |
| CN105803875A (en) * | 2016-03-15 | 2016-07-27 | 广东盛瑞科技股份有限公司 | Construction method for preparing foam-light-soil-poured high-speed rail subgrade |
| CN105906251A (en) * | 2016-04-14 | 2016-08-31 | 河海大学 | Double-index three-step circulation control fast test method for bubble mixed light soil |
| CN105985138A (en) * | 2015-03-05 | 2016-10-05 | 中交第三公路工程局有限公司 | Foam light soil synthetic material for filling highway subgrade, method for preparing foam light soil synthetic material, and highway subgrade filling method |
| CN111116137A (en) * | 2019-12-30 | 2020-05-08 | 同济大学 | Recycling method of building waste soil after foaming process |
| CN112851401A (en) * | 2021-03-17 | 2021-05-28 | 哈尔滨工业大学 | Polyacrylonitrile fiber foam light soil applied to roadbed and preparation method thereof |
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| CN101386548A (en) * | 2008-10-29 | 2009-03-18 | 梁林华 | Light foaming concrete and production method and use thereof |
| JP2013107785A (en) * | 2011-11-18 | 2013-06-06 | East Japan Railway Co | Roadbed material with glass foam |
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Patent Citations (4)
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| JPS6417901A (en) * | 1987-07-09 | 1989-01-20 | Nagasaki Ryoko Concrete Kogyo | Artificial lightweight material for ground and piled soil |
| CN1422826A (en) * | 2002-12-25 | 2003-06-11 | 广东冠粤路桥有限公司 | Bubble mixed light clay and method for preparing the same |
| CN101386548A (en) * | 2008-10-29 | 2009-03-18 | 梁林华 | Light foaming concrete and production method and use thereof |
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Non-Patent Citations (1)
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| 吴玉彪: "泡沫轻质土填充施工工艺", 《城市建设理论研究（电子版）》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105985138A (en) * | 2015-03-05 | 2016-10-05 | 中交第三公路工程局有限公司 | Foam light soil synthetic material for filling highway subgrade, method for preparing foam light soil synthetic material, and highway subgrade filling method |
| CN104961393A (en) * | 2015-06-11 | 2015-10-07 | 东南大学 | Quartz sand slag foamed light soil filling material for highway abutment backfill |
| CN105155383A (en) * | 2015-07-31 | 2015-12-16 | 中交二公局第三工程有限公司 | Construction process of bubble light soil |
| CN105803875A (en) * | 2016-03-15 | 2016-07-27 | 广东盛瑞科技股份有限公司 | Construction method for preparing foam-light-soil-poured high-speed rail subgrade |
| CN105906251A (en) * | 2016-04-14 | 2016-08-31 | 河海大学 | Double-index three-step circulation control fast test method for bubble mixed light soil |
| CN105906251B (en) * | 2016-04-14 | 2017-11-24 | 河海大学 | The step loop control fast determining method of Two indices three of air bubble mix light-textured soil |
| CN111116137A (en) * | 2019-12-30 | 2020-05-08 | 同济大学 | Recycling method of building waste soil after foaming process |
| CN112851401A (en) * | 2021-03-17 | 2021-05-28 | 哈尔滨工业大学 | Polyacrylonitrile fiber foam light soil applied to roadbed and preparation method thereof |
| CN112851401B (en) * | 2021-03-17 | 2022-11-18 | 哈尔滨工业大学 | Polyacrylonitrile fiber foam light soil applied to roadbed and preparation method thereof |
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|---|---|
| CN103467038B (en) | 2015-12-02 |
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Owner name: THE FORTH SURVEY AND DESIGN INSTITUTE (GROUP) CO., Free format text: FORMER OWNER: GUANGDONG SHENG RUI CIVIL TECHNOLOGY Effective date: 20140402 |
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Inventor after: Chang Bo Inventor after: Gu Xiangsheng Inventor after: Zhao Xinyi Inventor after: Yan Dong Inventor after: Luo Yong Inventor after: Wang Jianbin Inventor after: Jin Rui Inventor after: Xu Yongjian Inventor after: Zhang Zhigang Inventor after: Shen Xihua Inventor after: Luo Xuanang Inventor after: Li Zongping Inventor after: Sun Honglin Inventor after: Deng Fei Inventor before: Chang Bo Inventor before: Jin Rui Inventor before: Xu Yongjian Inventor before: Zhang Zhigang Inventor before: Shen Xihua Inventor before: Luo Xuanang Inventor before: Li Zongping Inventor before: Luo Yong Inventor before: Wang Jianbin |
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Free format text: CORRECT: INVENTOR; FROM: CHANG BO JIN RUI XU YONGJIAN ZHANG ZHIGANG SHEN XIHUA LUO XUANANG LI ZONGPING LUO YONG WANG JIANBIN TO: CHANG BO JIN RUI XU YONGJIAN ZHANG ZHIGANG SHEN XIHUA LUO XUANANG LI ZONGPING SUN HONGLIN DENG FEI GU XIANGSHENG ZHAO XINYI YAN DONG LUO YONG WANG JIANBIN |
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Effective date of registration: 20140402 Address after: 9 building, building 20, building 310012, Wensanlu Road, Zhejiang, Hangzhou Applicant after: Zhejiang Construction Engineering (Group) Co., Ltd. Applicant after: The forth Survey and Design Institute (Group) Co., Ltd. Of CRCC Applicant after: Guangdong Sheng Rui Civil Technology Address before: 9 building, building 20, building 310012, Wensanlu Road, Zhejiang, Hangzhou Applicant before: Zhejiang Construction Engineering (Group) Co., Ltd. Applicant before: Guangdong Sheng Rui Civil Technology |
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Address after: 9 building, building 20, building 310012, Wensanlu Road, Zhejiang, Hangzhou Patentee after: Zhejiang Construction Engineering (Group) Co., Ltd. Patentee after: The forth Survey and Design Institute (Group) Co., Ltd. Of CRCC Patentee after: GUANGDONG SHENGRUI TECHNOLOGY CO., LTD. Address before: 9 building, building 20, building 310012, Wensanlu Road, Zhejiang, Hangzhou Patentee before: Zhejiang Construction Engineering (Group) Co., Ltd. Patentee before: The forth Survey and Design Institute (Group) Co., Ltd. Of CRCC Patentee before: Guangdong Sheng Rui Civil Technology |