CN103467038B - A kind of Foam lightweight soil high ferro roadbed - Google Patents
A kind of Foam lightweight soil high ferro roadbed Download PDFInfo
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- CN103467038B CN103467038B CN201310390787.2A CN201310390787A CN103467038B CN 103467038 B CN103467038 B CN 103467038B CN 201310390787 A CN201310390787 A CN 201310390787A CN 103467038 B CN103467038 B CN 103467038B
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Abstract
The invention discloses a kind of Foam lightweight soil high ferro roadbed, it is characterized in that, downward 0 ~ the 1.0m in roadbed top, built by the Foam lightweight soil of bubble rate 66.6% and form, is the Foam lightweight soil of every cubic metre by 343kg cement and 223? kg water and whipping agent mixed foaming are formed, does is construction wet density 570kg/m3 ~ 600? kg/m3; Downward more than the 1.0m in roadbed top, is built by the Foam lightweight soil of bubble rate 69.6% and forms, is the Foam lightweight soil of every cubic metre by 312? kg cement and 203kg water and whipping agent mixed foaming are formed, and construction wet density is 550kg/m3 ~ 570kg/m3.Foam lightweight soil high ferro subgrade strength of the present invention is high, stable performance, not free settling, distortion, can ensure the steady and safety that bullet train runs, and reduce the maintenance cost during operation in the future.
Description
Technical field
The invention belongs to the technical field of building operation, particularly relate to a kind of Foam lightweight soil high ferro roadbed, adopt intensity high, that wet density is good Foam lightweight soil to build and form, can ensure shaping after Foam lightweight soil subgrade strength and monolithic stability.
Background technology
China has promoted the climax of railway construction in recent years, and within nearly ten years, China railways will build Line for Passenger Transportation 1.2 ten thousand more than km, and by 20,000 km both wired Speed Increased Reformed of carrying out speed per hour 200km, facilitates the construction of many large-scale stations or super-huge station simultaneously.And the ride comfort of train high-speed cruising to track has very high requirement, otherwise high-speed cruising just can not realize.Roadbed is the basis of track, therefore also must have strict restriction to the smooth-going, stable of roadbed.
Rail track is made up of the foundation structure thing (bridge, tunnel, roadbed etc.) of different characteristics and track structure, and they interact, interdependence, jointly forms a combination foundation circuit.Foundation structure thing is divided into again cast-in-place structural basis and fills architecture basics, cast-in-place structural basis is railway span river, the bridge that intermountain etc. must be arranged, the structures such as tunnel, fill architecture basics to be generally and to fill graded broken stone or graded sand gravel mixes a certain amount of cement, fill the railway bed of the design forms such as AB material, 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, when causing train to pass through basic intersection, impact is produced to track structure, train is made again to produce large vibration conversely, cause train operation worsening condition, vehicle, track structure service life reduction, affect the steady and security problems that bullet train runs.Therefore need that a kind of intensity is high, the roadbed embankment material of stable performance makes basis and to substitute or Part Substitution (arranging basement transition stage) fills structure roadbed, guarantee the current safety of bullet train, and the maintenance cost reduced 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 Foam lightweight soil high ferro roadbed, adopt high, that wet density the is good Foam lightweight soil of intensity to build and form.Foam lightweight soil formula is configured according to high ferro subgrade rating feature and designing technique index request, is tested and checks, can meet the demands completely by flow valuve, froth breaking and ultimate compression strength etc.
In order to realize above-mentioned technical purpose, present invention employs following technical scheme:
A kind of Foam lightweight soil high ferro roadbed, it is characterized in that the downward 0 ~ 1.0m in roadbed top is built by the Foam lightweight soil of bubble rate 66.6% and forms, the Foam lightweight soil of every cubic metre is formed by 343kg cement and 223kg water and whipping agent mixed foaming, and construction wet density is 570kg/m
3~ 600kg/m
3; Downward more than the 1.0m in roadbed top, is built by the Foam lightweight soil of bubble rate 69.6% and forms, and the Foam lightweight soil 312kg cement 203kg water of every cubic metre and whipping agent mixed foaming are formed, and construction wet density is 550kg/m
3~ 570kg/m
3.
Downward 0 ~ the 1.0m in roadbed top, subgrade strength is more than 1.0MPa; Downward more than the 1.0m in roadbed top, subgrade strength is more than 0.8MPa.
Described cement is preferably 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 the such as Zhijiang River, Zhejiang Province Cement Co., Ltd produces.Whipping agent selects that bleeding rate is low, wet density increment rate is low, the Foam lightweight soil steady quality that can ensure to prepare, evenly.The SRTJ-A type whipping agent that such as Guangdong Sheng Rui Civil Technology produces.
Described Foam lightweight soil flow valuve is 160 ~ 180mm, can give full play to cast-in-place foamed light soils good fluidity, meets the requirement of construction pumping.
The acid-basicity of described water is neutral.
The present invention, in conjunction with the construction characteristic of high ferro roadbed, specify that different depths roadbed adopts different Foam lightweight soil to build.With from the downward 1m of roadbed end face for boundary, the roadbed of 0 ~ 1.0m is built by the Foam lightweight soil of bubble rate 66.6% and is formed; The roadbed of more than 1.0m is built by the Foam lightweight soil of bubble rate 69.6% and is formed.
Foam lightweight soil 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) froth breaking test Foam lightweight soil wet density increment rate is no more than 10%.
High ferro roadbed Foam lightweight soil formulating of recipe and raw material quality control very strict, the formula of every block roadbed Foam lightweight soil used wants strict conformance, newly mix Foam lightweight soil and must have fabulous workability and cohesiveness, absolutely not allow the phenomenon occurring laminated segregation.The starting material place of production must be unified, and cement used is as far as possible with same batch of same producer.
High ferro roadbed of the present invention, its Foam lightweight soil is filled a prescription, component ratio is scientific and reasonable, its serviceability meets Foam lightweight soil pumping and fills requirement, the advantages such as good mobility, stable antifoam performance, pumpability can be reached, can ensure shaping after Foam lightweight soil subgrade strength and monolithic stability.
Foam lightweight soil high ferro subgrade strength of the present invention is high, stable performance, not free settling, distortion, can ensure the steady and safety that bullet train runs, and reduce 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.
Accompanying drawing explanation
Fig. 1 is Foam lightweight soil froth breaking trial curve figure.
Specific embodiment
Each component of preparation high ferro roadbed Foam lightweight soil 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 produces.Leading indicator: the presetting period must not early than 45min, and final setting time must not be later than 10h, and fineness, time of coagulation, stability and intensity meet 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 according to the form below requirement to test simultaneously.
(3), the whipping agent that adopts of foaming is the SRTJ-A type whipping agent that Guangdong Sheng Rui Civil Technology produces, and has the features such as bleeding rate is low, wet density increment rate is low, the Foam lightweight soil steady quality ensureing to prepare, evenly.Whipping agent should meet following table and require:
Whipping agent technical indicator
| Performance index | Prescribed value |
| Dilution ratio | 40～60 |
| Expansion ratio | 800～1200 |
(4), hydromining tap water, soda acid inspection is in neutral.
(5), to this high ferro roadbed Foam lightweight soil formula carry out wet density, flow valuve and froth breaking test, when flow valuve meet the demands, froth breaking test the wet density increment rate determined meet the demands time, 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 carried out froth breaking test to the PC32.5 cement adopted, test-results as shown in Figure 1.
(7) again to aforementioned formula ultimate compression strength result in the shaping 7 day length of time as following table.
Formula strength test results table
Final table from the graph can find out that the high ferro roadbed Foam lightweight soil flow valuve of this formula mixing, wet density and ultimate compression strength all meet high ferro roadbed technology and construction requirement.
Above-mentioned Foam lightweight soil is adopted to build high ferro roadbed, downward 0 ~ the 1.0m in roadbed top, built by the Foam lightweight soil of bubble rate 66.6% and form, the Foam lightweight soil of every cubic metre is formed by 343kg cement and 223kg water and whipping agent mixed foaming, and construction wet density is 570kg/m
3~ 600kg/m
3.Downward more than the 1.0m in roadbed top, is built by the Foam lightweight soil of bubble rate 69.6% and forms, and the Foam lightweight soil 312kg cement of every cubic metre and 203kg water and whipping agent mixed foaming are formed, and construction wet density is 550kg/m
3~ 570kg/m
3.
Configuration high ferro roadbed Foam lightweight soil after testing, the downward 0 ~ 1.0m in roadbed top, subgrade strength can reach more than 1.0MPa; Downward more than the 1.0m in roadbed top, subgrade strength can reach more than 0.8MPa.
Foam lightweight soil high ferro subgrade strength of the present invention is high, stable performance, not free settling, distortion, can ensure the steady and safety that bullet train runs, and reduce the maintenance cost during operation in the future.
Claims (2)
1. a Foam lightweight soil high ferro roadbed, it is characterized in that, downward 0 ~ the 1.0m in roadbed top, built by the Foam lightweight soil of bubble rate 66.6% and form, the Foam lightweight soil of every cubic metre is formed by 343kg cement and 223kg water and whipping agent mixed foaming, and construction wet density is 570kg/m3 ~ 600kg/m3; Downward more than the 1.0m in roadbed top, is built by the Foam lightweight soil of bubble rate 69.6% and forms, and the Foam lightweight soil of every cubic metre is formed by 312kg cement and 203kg water and whipping agent mixed foaming, and construction wet density is 550kg/m3 ~ 570kg/m3; Downward 0 ~ the 1.0m in roadbed top, subgrade strength is more than 1.0MPa; Downward more than the 1.0m in roadbed top, subgrade strength is more than 0.8MPa; Described cement is composite Portland cement, and the presetting period is greater than 45 minutes, and final setting time is less than 10 hours; Described Foam lightweight soil flow valuve is 160 ~ 180mm.
2. Foam lightweight soil high ferro roadbed according to claim 1, is characterized in that, the acid-basicity of described water is neutral.
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Families Citing this family (7)
| 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 |
| 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 |
| 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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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6417901A (en) * | 1987-07-09 | 1989-01-20 | Nagasaki Ryoko Concrete Kogyo | Artificial lightweight material for ground and piled soil |
| JP5950544B2 (en) * | 2011-11-18 | 2016-07-13 | 東日本旅客鉄道株式会社 | Roadbed material with glass foam |
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| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 泡沫轻质土填充施工工艺;吴玉彪;《城市建设理论研究（电子版）》;20121231(第33期);第2，4页 * |
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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 |