CN101024963A - Crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method - Google Patents
Crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method Download PDFInfo
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- CN101024963A CN101024963A CNA2007100205904A CN200710020590A CN101024963A CN 101024963 A CN101024963 A CN 101024963A CN A2007100205904 A CNA2007100205904 A CN A2007100205904A CN 200710020590 A CN200710020590 A CN 200710020590A CN 101024963 A CN101024963 A CN 101024963A
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention is a seamless anti-seeping stable expansion soil excavation dyke slope construction method, a seamless anti-seeping stable expansion soil excavation dyke slope design method used for expansion soil channel slopes and terraces in hydraulic and road engineering, especially a design directly applied to the filed of hydraulic engineering in expansion soil regions, and its construction method comprises: A. verifying and determining expansion potential and buried depth and thickness of expansion soil in a region; B. selecting slip casting pressure and adopting runny grout or cement coal ash grout for cleavage grouting at 0.3MPa-1.0Mpa; C. after the grout or cement coal ash grout in the expansion soil concretes, excavating according to the designed slope; and D. making seamless anti-seeping protective layer construction. And the modified expansion soil compact structure is stable and unable to season crack, and the compact layer has very small seepage coefficient, achieving the anti-seeping purpose and meeting the anti-seeping requirement, and having an efficacy of treating both principal and secondary aspects.
Description
Technical field
The present invention is a kind of water conservancy and highway construction expansive soil canal slope and embankment crack-seam-free seepage-proof stable sweeled ground excavation dyke slope method for designing of being used for; especially a kind of design that directly applies to the side slope in swelled ground area hydraulic engineering field utilizes this technology can protect and prevent swelled ground area canal slope because the accidents such as rain infiltration causing landslide and unstability of oozing take place.
Background technology
China has found that more than 20 province and autonomous region are distributed with a large amount of expansive soils, and expansive soil is a kind of special soil, and the imbibition dehydration is dry and cracked, and going round and beginning again causes the side slope unstability; Embankment collapses influences the normal operation of road and rail; The river course is stopped up on the river levee landslide, and the influence navigation is drained off floodwaters waterlogging-resistant; Make light-duty construction cracking, even collapse, bring about great losses to lives and properties.
Expansive soil has special engineering properties because of it, easily causes canal slope unstability, and is very big to the safe operation influence of engineering, and the engineering quantity and the investment of its intractability, processing are also bigger, especially the canal slope in the excavation location of expansive soil.Therefore, the processing of expansive soil slope is one of main difficult technical of relevant hydraulic engineering.How to build up the canal slope of stablizing antiseepage and will be related to the success or failure of whole engineering construction.
In addition, the speedway of swelled ground area, railroad embankment and canal slope, river are constructed normally, and admixture lime and cement carry out the expansive soil modification, but since shorter stationary phase with lime and modified cement, generally at 2-3, can not satisfy the requirement of actual engineering long-term stability.This is prone to dry and cracked seam mainly due to this modification soil, and water penetrates into inside soil body from these dry and cracked seams, and expansive soil inside produces because of moisture increases expands, and quickens the growth and the extension of the dry and cracked seam in big top layer, reduces the effect of modification.Therefore, in the hydraulic engineering this simple modification very dangerous concerning engineering, and have hidden danger.
Summary of the invention
Technical problem: the objective of the invention is to propose crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method, adopt this job practices to carry out the reinforcing of deep layer expansive soil soil structures, it is simple and convenient, nontoxic to construct, and can guarantee the stability and security of swelled ground area excavation side slope.
Technical scheme: crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method of the present invention comprises two parts.The one, the structural reinforcing of expansive soil inside soil body, because expansive soil excavation side slope off-load effect, cause the initial fissure of expansive soil to enlarge intensification, these cracks are split employing defeat slurry and carry out the shutoff crack, utilize the cement bonded sand slurries of mud jacking to make the expanded clay that distributes along the sides of fracture both sides mineral modified simultaneously, reduce dilatancy, carry out the reinforcing of deep layer expansive soil soil structures like this.The 2nd, side slope is seamless antiseepage topping, the side slope protection layer carries out compaction in layers again by adjusting the grain composition and the modification of expansive soil; reduce transmission coefficient; dry and cracked seam no longer appears in the expansive soil compacted lift that changes grating simultaneously, and stable performance plays a protective role to the deep original state.This technology can be used for going in the engineering construction on speedway, railroad embankment and canal slope, river of swelled ground area.
Expansive soil occurs that imbibition dehydration is dry and cracked to contain fine grain expansile clay mineral mainly due to expansive soil; the expansive soil of original state contains a large amount of primary secondary cracks; traditional improving technology is shorter stationary phase, usually can occur cracking after use a period of time, and modification was lost efficacy.The first step of the present invention adopts to split to defeat to starch to expansive soil excavation side slope inside carries out the soil structures reinforcing in shutoff crack; Second step was adopted seamless antiseepage topping; seamless antiseepage topping adopts nontoxic lime, flyash and a small amount of flour sand to be spiked in the expansive soil; adjust the grain composition of expansive soil; improve the swell-shrink characteristic and the mass of soil kernel structure of clay; reach purpose, after stirring, carry out the layered vibration compacting, and dry and cracked seam can not occur to physical modification; expansive soil densification layer Stability Analysis of Structures behind this physical modification, transmission coefficient is very little, and (transmission coefficient is less than 1 * 10
-7Cm/s), reach the purpose and the requirement of antiseepage.This technology reaches the effect for the treatment of both principal and secondary aspect of disease.
Concrete operation is as follows:
A, the expansion gesture of verifying mensuration region expansive soil and the buried depth and the thickness of expansive soil;
B, the runny cement paste of employing or cement and flying ash grout are split and are defeated slurry, the pressure 0.3～1.0MPa of slip casting;
Excavate by the grade of side slope of design c, the cement paste of waiting to be pressed into the expansive soil inside soil body or the fixed back of cement and flying ash grout (needing about month usually);
D, carry out the construction of seamless antiseepage topping:
D1) grading curve and the swell-shrink characteristics of the former soil layer expansive soil of mensuration;
D2) in expansive soil and mix the lime that accounts for gross weight 5～10%, preparing several gross weight ratios that account for again respectively is 5%～12% flyash and to account for the gross weight ratio be 1%～2% fine sand, measures grading curve;
D3) according to d2) in the lime, flyash of test admixture and the ratio of a small amount of flour sand carry out compaction test, obtain different tamping curves, and obtain corresponding optimum moisture content and maximum dry density;
D4) carry out sample preparation according to corresponding lime, flyash and when corresponding optimum moisture content and the maximum dry density of a small amount of flour sand fusion, measure the modified effect and the transmission coefficient of sample, thereby find lime, flyash and a small amount of flour sand blend ratio that satisfies the correlation engineering needs;
D5) obtain best lime, flyash and a small amount of flour sand blend ratio according to test, stir with expansive soil, the configuration optimum moisture content carries out vibratory compaction, forms the densification layer, and placement in layers forms various embankments or canal slope like this.
Beneficial effect: this construction technology, it is simple and convenient, nontoxic to construct, and utilizes this technology can protect and prevent swelled ground area canal slope because the accidents such as rain infiltration causing landslide and unstability of oozing take place.This construction technology not only ensures the anti-seepage effect of expansive soil soil body surface, simultaneously the excavation expansive soil slope is lost continuity and also carried out structural resistance to overturning and reinforce because of various cracks appear in off-load, reach the purpose for the treatment of both principal and secondary aspect of disease, guarantee the stability and security of swelled ground area excavation side slope, can prevent effectively that the geological disaster of wide-spread decline from appearring in expansive soil excavation side slope, avoid having tangible economic benefit and social benefit because of the economic loss that wide-spread decline causes appears in expansive soil excavation side slope.
Description of drawings
Fig. 1 is a canal slope schematic diagram.Wherein have: wave resistance topping 1, seamless soil property topping 2, rock-steady structure stabilization zone 3, gutter 4.
The specific embodiment
Method for building up of the present invention is as follows:
A, the expansion gesture of verifying mensuration region expansive soil and the buried depth and the thickness of expansive soil;
The pressure of b, selected slip casting adopts runny cement paste or cement and flying ash grout to split and defeats slurry;
Excavate by the grade of side slope of design c, the cement paste of waiting to be pressed into the expansive soil inside soil body or the fixed back of cement and flying ash grout (needing about month usually);
D, carry out the construction of seamless antiseepage topping:
D1) grading curve and the swell-shrink characteristics of the former soil layer expansive soil of mensuration;
D2) in expansive soil and mix the lime that accounts for gross weight 5～12%, preparing several gross weight ratios that account for again respectively is 5%～12% flyash and to account for the gross weight ratio be 1%～2% fine sand, measures grading curve;
D3) according to d2) in the lime, flyash of test admixture and the ratio of a small amount of flour sand carry out compaction test, obtain different tamping curves, and obtain corresponding optimum moisture content and maximum dry density;
D4) carry out sample preparation according to corresponding lime, flyash and when corresponding optimum moisture content and the maximum dry density of a small amount of flour sand fusion, measure the modified effect and the transmission coefficient of sample, thereby find flyash and a small amount of flour sand blend ratio that satisfies the correlation engineering needs;
D5) obtain best lime, flyash and a small amount of flour sand blend ratio according to test, stir with expansive soil, the configuration optimum moisture content carries out vibratory compaction, forms the densification layer, and placement in layers forms various embankments or canal slope like this.
Claims (2)
1, a kind of crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method is characterized in that job practices is:
A, the expansion gesture of verifying mensuration region expansive soil and the buried depth and the thickness of expansive soil;
The pressure of B, selected slip casting adopts runny cement paste or cement and flying ash grout to split and defeats slurry, and the pressure of slip casting is got 0.3Mpa～1.0MPa;
After C, the cement paste of waiting to be pressed into the expansive soil inside soil body or cement and flying ash grout are fixed, excavate by the grade of side slope of design;
D, carry out the construction of seamless antiseepage topping.
2. crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method according to claim 1 is characterized in that the method for seamless antiseepage topping construction is:
A) grading curve and the swell-shrink characteristics of the former soil layer expansive soil of mensuration;
B) in expansive soil, 1. mix the lime that accounts for gross weight 5～10%, 2. mix the flyash that accounts for gross weight 5～12%, 3. mix the gross weight ratio again and be 1～2% fine sand, prepare then several different proportions mix than the compound of expansive soil+lime+flyash+fine sand, respectively these compounds are carried out a separating tests again, measure their grading curves;
C) carry out compaction test respectively according to the ratio of the lime of testing admixture in the step b), flyash and a small amount of fine sand, test obtains different tamping curves, obtains corresponding optimum moisture content and maximum dry density with these tamping curves;
D) carry out sample preparation according to corresponding lime, flyash and when corresponding optimum moisture content and the maximum dry density of a small amount of fine sand fusion, measure the modified effect and the transmission coefficient of sample, thereby find flyash and a small amount of fine sand blend ratio that satisfies the correlation engineering needs;
E) obtain best lime, flyash and a small amount of fine sand blend ratio according to test, stir with expansive soil, the configuration optimum moisture content carries out vibratory compaction, forms the densification layer, and placement in layers forms various embankments or canal slope like this.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100205904A CN100460604C (en) | 2007-03-14 | 2007-03-14 | Crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method |
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| CNB2007100205904A CN100460604C (en) | 2007-03-14 | 2007-03-14 | Crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method |
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| CN101024963A true CN101024963A (en) | 2007-08-29 |
| CN100460604C CN100460604C (en) | 2009-02-11 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671723A (en) * | 2014-12-12 | 2015-06-03 | 安徽恒源煤电股份有限公司 | Paste injecting material of expansive soil cement paste |
| CN105174906A (en) * | 2015-06-10 | 2015-12-23 | 三峡大学 | Improved formula of expansive soil and construction process using improved formula |
| CN106917399A (en) * | 2017-03-15 | 2017-07-04 | 西北大学 | A kind of method for reducing swelled ground swell-shrink characteristics |
| CN112029509A (en) * | 2020-09-27 | 2020-12-04 | 中交路桥建设有限公司 | Modifier for mixing ash in expansive soil and improvement method thereof |
| CN112341073A (en) * | 2020-11-12 | 2021-02-09 | 中冶成都勘察研究总院有限公司 | Cement slurry for weakening expansibility of expansive soil |
| CN114315272A (en) * | 2021-12-23 | 2022-04-12 | 中国科学院武汉岩土力学研究所 | Grouting material for expansive soil dam cracks and preparation method thereof |
| CN114878436A (en) * | 2022-06-01 | 2022-08-09 | 桂林理工大学 | Transparent soil-based rainfall landslide visualization model and preparation method thereof |
| CN114965962A (en) * | 2022-06-01 | 2022-08-30 | 桂林理工大学 | Visualization method for applying transparent soil technology to composite aquifer structure and evolution thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042206A (en) * | 1988-10-27 | 1990-05-16 | 李启海 | A kind of foundation anti-seepage method of water retaining structure |
| CN1162577A (en) * | 1997-04-04 | 1997-10-22 | 袁奕 | Fly ash pile and application process |
| JP4322382B2 (en) * | 1999-12-21 | 2009-08-26 | 大成建設株式会社 | Slope impermeable structure |
| CN1331366A (en) * | 2000-06-28 | 2002-01-16 | 刘正刚 | High-pressure grouting technique for stiffening slope of anchor cable (rod) system |
| CN1114670C (en) * | 2000-11-20 | 2003-07-16 | 于英男 | Solidifying composition for coagulating soil |
| CN100387784C (en) * | 2004-09-07 | 2008-05-14 | 陈永烽 | Expansion soil ecological modifying agent and construction method |
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2007
- 2007-03-14 CN CNB2007100205904A patent/CN100460604C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671723A (en) * | 2014-12-12 | 2015-06-03 | 安徽恒源煤电股份有限公司 | Paste injecting material of expansive soil cement paste |
| CN105174906A (en) * | 2015-06-10 | 2015-12-23 | 三峡大学 | Improved formula of expansive soil and construction process using improved formula |
| CN106917399A (en) * | 2017-03-15 | 2017-07-04 | 西北大学 | A kind of method for reducing swelled ground swell-shrink characteristics |
| CN106917399B (en) * | 2017-03-15 | 2019-06-21 | 西北大学 | A method of reducing swelled ground swell-shrink characteristics |
| CN112029509A (en) * | 2020-09-27 | 2020-12-04 | 中交路桥建设有限公司 | Modifier for mixing ash in expansive soil and improvement method thereof |
| CN112341073A (en) * | 2020-11-12 | 2021-02-09 | 中冶成都勘察研究总院有限公司 | Cement slurry for weakening expansibility of expansive soil |
| CN114315272A (en) * | 2021-12-23 | 2022-04-12 | 中国科学院武汉岩土力学研究所 | Grouting material for expansive soil dam cracks and preparation method thereof |
| CN114878436A (en) * | 2022-06-01 | 2022-08-09 | 桂林理工大学 | Transparent soil-based rainfall landslide visualization model and preparation method thereof |
| CN114965962A (en) * | 2022-06-01 | 2022-08-30 | 桂林理工大学 | Visualization method for applying transparent soil technology to composite aquifer structure and evolution thereof |
| CN114878436B (en) * | 2022-06-01 | 2023-08-22 | 桂林理工大学 | Rainfall landslide visual model based on transparent soil and preparation method thereof |
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| CN100460604C (en) | 2009-02-11 |
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