CN102704497B - RPW (ranked position weight) process for treating high fill slope - Google Patents
RPW (ranked position weight) process for treating high fill slope Download PDFInfo
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- CN102704497B CN102704497B CN201210174867.XA CN201210174867A CN102704497B CN 102704497 B CN102704497 B CN 102704497B CN 201210174867 A CN201210174867 A CN 201210174867A CN 102704497 B CN102704497 B CN 102704497B
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Abstract
The invention discloses an RPW (ranked position weight) process for treating a high fill slope. According to the RPW process, the problem of surface layer infiltration of atmospheric rainfall in a fill slope is solved by using a surface soil replacement, rolling and compaction technology, the problem of compaction degree of earth fill in a critical infiltration depth range of the atmospheric rainfall is solved by using a middle slope body pressure grouting technology, and the problem of stability of earth fill outside the critical infiltration depth range of the atmospheric rainfall is solved by using a lower slope face compaction and foot protection technology. The invention provides a three-dimensional combined treatment technique for reinforcing the fill slope by using the surface soil replacement, rolling and compaction, the middle slope body pressure grouting and the lower slope face compaction and foot protection from top to bottom with the critical infiltration depth as a pointcut based on the treatment idea of a cataclysm space partition aiming at the particularity of the fill slope and the basic reason for instability of the fill slope. The RPW process has the advantages that an atmospheric rainfall surface layer infiltration passage is obstructed by using the surface soil replacement, rolling and compaction technology, the problem of stability of a shallow layer of the fill slope is solved, the compaction degree of the fill in the critical infiltration depth range of the atmospheric rainfall is enhanced by using the middle slope body pressure grouting technology, and the problem of instability of a deep layer of the fill slope is solved. The RPW process has high pertinence and high reliability based on the treatment idea of the cataclysm space partition, and the influence on the fill slope by the atmospheric rainfall is solved substantially. Meanwhile, the process has the advantages of simple construction process, short construction period, low manufacturing cost and the like, and is a new fill slope treatment technology which is worthy of being promoted and applied.
Description
Technical field
The technology of the present invention relates to a kind for the treatment of technology of embankment side slope, a kind ofly specifically adopts the three-dimensional combined treatment technology of changing and filling out and rolling compacting, slope body pressure grouting and domatic compacting spats Combined Treatment embankment side slope from top to bottom.
Background technology
When mountain area and hilly ground new construction, for meeting place leveling needs, a large amount of steep embankment side slopes of height will be formed.Embankment side slope material composition is complicated, loosely organized, and very easily unstability under the effect of the unfavorable factor such as rainfall or earthquake, the tremendous economic caused is lost.When adopting single anti-sliding support measure (as antislide pile, anchorage pile etc.) process, owing to banketing, self shear strength is low, self-stable ability is poor, reach design safety standard often need heavy in section antislide pile or arrange antislide pile more, construction cost is high, the cycle is long, and be difficult to form Soil arch between piles effect, inter-pile soil is easily extruded and is caused harnessing project to lose efficacy.When adopting single anchor measure (as prestress anchorage cable, lattice anchor cable etc.) process, due to banket and adhesion strength between anchoring body lower, reach design safety standard and often need large diameter long prestress anchorage cable, construction cost is high, complicated construction technique, and when the shiver stone content that bankets is higher, pore-forming difficulty is large, prestressing force easily loses.As can be seen here, tradition administers reinforcement measure complicated construction technique, cost is high, the cycle is long, technically reliable degree is not high, be difficult to the permanent stabilization sex chromosome mosaicism fundamentally solving welding with filler wire, be therefore necessary from banket self particularity and instability Mechanism angle thereof to set up the improvement system of such side slope.
Welding with filler wire deformation instability mainly contains the reason of two aspects, and one is that atmospheric precipitation makes the soil body within the scope of certain depth moistening saturated, reduces shear strength of banketing; Two is that atmospheric precipitation changes underground water dynamics condition in the body of slope, and produce penetration effect, weaken slope stability further, namely the laxity of atmospheric precipitation and fill structure is the basic reason causing such side slope to produce deformation instability.
A large amount of engineering practice and numerical simulation result display, welding with filler wire unstable sphere, scale are relevant to the critical degree of depth of infiltrating of atmospheric precipitation, strong ~ medium water permeability is banketed, when rainfall intensity is when 100mm/d, rainfall duration are within 3d, welding with filler wire unstability critical depth is below earth's surface within the scope of 6 ~ 8m.As can be seen here, the key that welding with filler wire is administered is how sealing and improves the compactness of topsoil.
Summary of the invention
The present invention seeks to for self particularity and the unstability basic reason thereof of banketing, based on the improvement thought of catastrophe space partition zone, with the critical degree of depth of infiltrating of atmospheric precipitation for cutting point, a kind of top-down three-dimensional combined treatment technology is proposed, fundamentally intercept the passage of welding with filler wire deformation instability, improve the reliability of such slope treatment, reduce construction cost and shorten the construction period.
A kind of method for the treatment of tall earth fill of the present invention, concrete technology contents is as follows:
(1) topsoil changes to fill out and rolls Compaction and solve atmospheric precipitation top layer and infiltrate problem, specifically banketing in 3.0m depth bounds below the end face of slope is adopted 37 lime earth displacement and rolls compacting with vibratory roller;
(2) middle slope body pressure grouting technology solves the critical compactness problem of banketing in depth bounds of infiltrating of atmospheric precipitation, specifically slope body pressure grouting is carried out to 1.2 times of critical employing cement-water glass biliquids that banket infiltrated in depth bounds of atmospheric precipitation below the end face of slope, form domatic hardened layer;
(3) the domatic compacting in bottom spats technology solves the critical stability problem banketed outside depth bounds that infiltrates of atmospheric precipitation, specifically infiltrate banketing outside depth bounds domaticly carry out hand compaction to 1.2 times of atmospheric precipitations below the end face of slope are critical, and along the cemented rock toe wall of domatic setting together high 3.0m near toe.
The advantage of a kind of method for the treatment of tall earth fill of the present invention is as follows:
(1) topsoil changes to fill out and rolls Compaction and both intercepted the contact channel between atmospheric precipitation and underground water, solves again the stability problem that shallow-layer bankets.
(2) body pressure grouting technology in slope had both solved the critical compactness problem of banketing in depth bounds of infiltrating of atmospheric precipitation, solved again the stability problem that deep layer is banketed.
(3) for self particularity and the unstability basic reason thereof of banketing, based on the improvement thought of catastrophe space partition zone, with the critical degree of depth of infiltrating of atmospheric precipitation for cutting point, the passage that welding with filler wire produces deformation instability has fundamentally been intercepted.At pointed strong, the high reliability of technical elements, there are the advantages such as technique is simple, the duration is short, cost is low at construction party mask.
Accompanying drawing explanation
Fig. 1 is the method process tall earth fill representative section figure for the treatment of tall earth fill.
Fig. 2 is the method grouting conduit structure chart for the treatment of tall earth fill.
In figure, size all in mm, 1-embankment line of slope, 2-original place upper thread, 3-8m grout hole, 4-4m grout hole, 5-3m height cemented rock wall, 6-
10 Reinforced Hoop, 7-
10 slurry outlets, 8-
36 common steel tubes, A changes to fill out and rolls compacting district, B pressure grouting district, C domatic compacting spats district, the critical degree of depth of infiltrating of h rainfall
Detailed description of the invention
Shown in root Ju Fig. 1, Fig. 2: a kind of method for the treatment of tall earth fill, concrete implementation step is as follows:
(1) topsoil changes to fill out and rolls compacting: banketing in 3.0m depth bounds below the end face of slope is adopted 37 lime earth (quicklime: cohesive soil=3:7) displacement, and adopting 18t vibratory roller to tamp 4 ~ 6 times, grinding compacting degree is not less than 90%;
(2) middle slope body pressure grouting: pressure grouting is carried out to critical the banketing employing steel floral tube infiltrated in depth bounds of times atmospheric precipitation of 3.0m ~ 1.2 below the end face of slope, forms domatic hardened layer;
(3) the domatic compacting in bottom spats: to 1.2 times of critical domatic employing N63.5 weight hand compactions of banketing of infiltrating outside depth bounds of atmospheric precipitation below the end face of slope, ram number to be no less than 4 and to hit, ram mark lap length and be not less than 10cm, and be not less than the cemented rock toe wall of 0.4m along domatic setting together high 3.0m, top width near pin.
Described domatic hardened layer completes in the following manner: first perpendicular to domatic be the grout hole that blossom type interval depth of placement is respectively 4.0m and 8.0m two kinds of specifications by 4.0 × 4.0m spacing, grouting aperture
50 ~ 90mm, adopts anhydrous drilled dry construction technology pore-forming; After pore-forming, the steel floral tube made is placed in hole, and rinses hole wall until clear water is returned in aperture with the hole flushing water pipe of band shower nozzle; Finally load onto mud jacking head and carry out slip casting in hole, when grouting pressure is stabilized in 2.0MPa, stop grouting, finally within the scope of the body certain depth of slope, form hardened layer.
Described steel floral tube makes in the following manner: steel floral tube adopts external diameter 36mm, and the common steel tube of wall thickness 4mm is processed into, and steel pipe afterbody is processed into sharp cone distal, welded top
10mm Reinforced Hoop, the following tube wall surrounding of afterbody 1.5m is bored every 125mm
10mm slurry outlet, other tube wall surrounding is bored every 80mm
10mm slurry outlet, does not open slurry outlet within the scope of the 400mm of steel pipe upper end.
Described pressure grouting completes in the following manner: be numbered from left to right by grout hole, by (1,4,7), (2,5,8), grout hole is divided into three groups by the numbering of (3,6,9), and successively each group is in the milk according to upper alignment sequence after first lower row, grouting liquid adopts cement-water glass, and cement paste compares 1:1.0 with water glass volume of slurry; Grouting adopts the piston closes mouth of pipe to ensure grouting pressure, and grouting steady pressure is not less than 2.0MPa.
Claims (4)
1. for the treatment of a method for tall earth fill, it is characterized in that, concrete implementation step is as follows:
(1) topsoil changes to fill out and rolls compacting: banketing in 3.0m depth bounds below the end face of slope is adopted 37 lime earth displacement, 37 lime earth is quicklime: cohesive soil=3:7, and adopting 18t vibratory roller to tamp 4 ~ 6 times, grinding compacting degree is not less than 90%;
(2) middle slope body pressure grouting: pressure grouting is carried out to critical the banketing employing steel floral tube infiltrated in depth bounds of times atmospheric precipitation of 3.0m ~ 1.2 below the end face of slope, forms domatic hardened layer;
(3) the domatic compacting in bottom spats: to 1.2 times of critical domatic employing N63.5 weight hand compactions of banketing of infiltrating outside depth bounds of atmospheric precipitation below the end face of slope, ram number to be no less than 4 and to hit, ram mark lap length and be not less than 10cm, and be not less than the cemented rock toe wall of 0.4m along domatic setting together high 3.0m, top width near pin.
2. a Ju a kind of method for the treatment of tall earth fill according to claim 1, it is characterized in that, described domatic hardened layer completes in the following manner: first perpendicular to domatic be the grout hole that blossom type interval depth of placement is respectively 4.0m and 8.0m two kinds of specifications by 4.0 × 4.0m spacing, grouting aperture
adopt anhydrous drilled dry construction technology pore-forming; After pore-forming, the steel floral tube made is placed in hole, and rinses hole wall until clear water is returned in aperture with the hole flushing water pipe of band shower nozzle; Finally load onto mud jacking head and carry out slip casting in hole, when grouting pressure is stabilized in 2.0MPa, stop grouting, finally within the scope of the body certain depth of slope, form hardened layer.
3. a Ju a kind of method for the treatment of tall earth fill according to claim 1, it is characterized in that, described steel floral tube makes in the following manner: steel floral tube adopts external diameter 36mm, and the common steel tube of wall thickness 4mm is processed into, steel pipe afterbody is processed into sharp cone distal, welded top
reinforced Hoop, the following tube wall surrounding of afterbody 1.5m is bored every 125mm
slurry outlet, other tube wall surrounding is bored every 80mm
slurry outlet, does not open slurry outlet within the scope of the 400mm of steel pipe upper end.
4. a Ju a kind of method for the treatment of tall earth fill according to claim 1, it is characterized in that, described pressure grouting completes in the following manner: be numbered from left to right by grout hole, by (1,4,7), (2,5,8), grout hole is divided into three groups by the numbering of (3,6,9), and is in the milk to each group successively according to upper alignment sequence after first lower row, grouting liquid adopts cement-water glass, and cement paste compares 1:1.0 with water glass volume of slurry; Grouting adopts the piston closes mouth of pipe to ensure grouting pressure, and grouting steady pressure is not less than 2.0MPa.
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| CN201210174867.XA CN102704497B (en) | 2012-05-31 | 2012-05-31 | RPW (ranked position weight) process for treating high fill slope |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102912800B (en) * | 2012-10-08 | 2015-08-19 | 中冶集团武汉勘察研究院有限公司 | A kind of for the treatment of after build the three-dimensional composite reinforcement method of the high steep embankment side slope of formula |
| CN102912802B (en) * | 2012-10-08 | 2015-09-16 | 中冶集团武汉勘察研究院有限公司 | A kind of for the treatment of after build the method for the high steep embankment side slope of formula |
| CN102912801B (en) * | 2012-10-08 | 2015-09-09 | 中冶集团武汉勘察研究院有限公司 | A kind of for the treatment of after build the method for the high steep embankment side slope of formula |
| CN102912803B (en) * | 2012-10-08 | 2015-09-09 | 中冶集团武汉勘察研究院有限公司 | A kind of for the treatment of after build the LTBD method of the high steep embankment side slope of formula |
| CN104963351A (en) * | 2015-07-08 | 2015-10-07 | 中冶集团武汉勘察研究院有限公司 | Reinforced structure for reinforcing treatment of artificial filled soil slopes and construction method thereof |
| CN110532609B (en) * | 2019-07-24 | 2021-02-19 | 清华大学 | Grouting pressure simulation method and device based on partition equivalent grouting pressure vector |
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