A kind of layer-stepping construction of soft soil treatment technique
Technical field
The present invention is a kind of Foundation Treatment technique that is applicable to uneven strata and soft soil layer, specifically refers to a kind of layer-stepping construction of soft soil treatment technique.
Background technology
At present, the similar embankment consolidation technology of domestic use mainly contains following several: 1) broken stone pile method: utilize vibration or impact mode, then pore-forming in soft foundation inserts the materials such as sand, gravel, cobble, rubble, forms the method for processing foundation of close sand stone mar after the extruding.This method is not suitable for weak cohesive soil ground.2) jet grounting: injectant is formed high pressure jet stream, by cutting and the mixing of high pressure jet stream, hardener and the soil body are mixed, with soil mass consolidation.This method construction period is long, and cost is high.3) powder spray piling method: utilize the powder spraying stirring rig that the powder curing compound is sprayed in soft scholar's ground, with soft scholar and curing compound action of forced stirring, soft soil consolidation is become have the cement pile body of some strength and form compound foundation.This method lack of homogeneity, intensity is low, use complicated machinery.
Summary of the invention
For addressing the above problem, the utility model provides a kind of layer-stepping construction of soft soil treatment technique.
Concrete solution is: in need location to be processed, adopt first artificial or mechanical method to dig out the space of requirement of engineering, original position weak soil and the sludge curing agent of excavating stirred, it is mixed, increase the water seepage prevention function of the soil body; The construction in layer process is: lay one deck curing compound in the bottom in the space of excavating first, soil body place Min layers is located on the curing compound layer after will stirring afterwards, the soil body used flattening equipment that it is flattened after every laying one deck stirred, laying the rear soil body of another layer stirring afterwards, lay and stir 2~5 layers of the rear soil bodys, soil body thickness is 30cm after the stirring of laying.
Further, the soil body was 3 layers after optimum laying was stirred.
Further, described sludge curing agent comprises that the pulvis of following parts by weight proportioning and liquor raw material form, described pulvis comprises that the component of following weight proportion forms, clinker 30~60 weight portions, slag or slag 30~60 weight portions, lime 3~8 weight portions, gypsum 1~7 weight portion, sulfate 1-7 weight portion; Described liquor comprises that the component of following weight proportion forms, polyacrylamide 5~30 weight portions, aluminium polychloride 0~20 weight portion, sweet mellow wine 0~30 weight portion, lignosulfonates 20~80 weight portions, lignosulfonates and iron, chromium ion complex compound 0~30 weight portion, APES 0.2~2 weight portion, tannic acid 0~10 weight portion, humate 0~10 weight portion, alpha-alkene sulfonate 0.2~2.5 weight portion.
Further, also include 0.2~2.0 weight portion in the pulvis raw material of described sludge curing agent, main component is the naphthalene series high-efficiency water-reducing agent of polymethine sodium naphthalene sulfonate.
Duration of the present invention is short, and cost is low, economy, and working procedure is simple, and can take full advantage of advantage, sealing and the good sealing effect of the soft scholar of original position, sand, gravel or piece stone, rubble.And its construction equipment is simple and easy.The present invention is a kind of easy to operate, the construction of soft soil treatment technique that construction effect is good.
The specific embodiment
One in need location to be processed, adopts first artificial or mechanical method to dig out the space of requirement of engineering, and original position weak soil and the sludge curing agent of excavating stirred, and it is mixed, and increases the water seepage prevention function of the soil body; The construction in layer process is: lay one deck curing compound in the bottom in the space of excavating first, soil body place Min layers is located on the curing compound layer after will stirring afterwards, the soil body used flattening equipment that it is flattened after every laying one deck stirred, laying the rear soil body of another layer stirring afterwards, lay and stir 2~5 layers of the rear soil bodys, soil body thickness is 30cm after the stirring of laying, and the soil body was 3 layers after optimum laying was stirred.
Can use different composition proportion for sludge curing agent.
Embodiment 1: a kind of sludge curing agent, formed by pulvis and liquor, and wherein the composition of pulvis and liquor and proportioning are as described below:
Described pulvis comprises that the component of following weight proportion forms clinker 30kg, slag or slag 30kg, lime 3kg, gypsum 1kg, sulfate 1kg; Described liquor comprises that the component of following weight proportion forms polyacrylamide 5kg, lignosulfonates 20kg, APES 0.2kg, alpha-alkene sulfonate 0.2kg.
The polymethine sodium naphthalene sulfonate naphthalene series high-efficiency water-reducing agent that in pulvis, includes 0.2kg.
Embodiment 2: a kind of sludge curing agent, formed by pulvis and liquor, and wherein the composition of pulvis and liquor and proportioning are as described below:
Clinker 60kg, slag or slag 60kg, lime 8kg, gypsum 7kg, sulfate 7kg; Described liquor comprises that the component of following weight proportion forms: polyacrylamide 30kg, aluminium polychloride 20kg, sweet mellow wine 30kg, lignosulfonates 80kg, lignosulfonates and iron, chromium ion complex compound 30kg, APES 2kg, tannic acid 10kg, humate 10kg, alpha-alkene sulfonate 2.5kg.
The polymethine sodium naphthalene sulfonate naphthalene series high-efficiency water-reducing agent that in pulvis, includes 2.0kg.
Embodiment 3: a kind of sludge curing agent, formed by pulvis and liquor, and wherein the composition of pulvis and liquor and proportioning are as described below:
Clinker 45kg, slag or slag 45kg, lime 5kg, gypsum 4kg, sulfate 4kg; Described liquor comprises that the component of following weight proportion forms: polyacrylamide 5kg, aluminium polychloride 5kg, sweet mellow wine 5kg, lignosulfonates 50kg, lignosulfonates and iron, chromium ion complex compound 5kg, APES 1.1kg, tannic acid 1kg, humate 2kg, alpha-alkene sulfonate 1.3kg.
The polymethine sodium naphthalene sulfonate naphthalene series high-efficiency water-reducing agent that in pulvis, includes 1.1kg.