Polymer Geogrid for Soft Foundation Strengthening, to strengthen the embankment on soft soil foundation to achieve stress uniformity, settlement adjustment, increase stability and fundus negative pressure capacity.
Polymer Geogrid Properties:
1. High intension, high tenacity, high occlusive force with soil or gravel, erosion-resistant, water drainage, light weight
2. Reinforce soft soil roadbed, rib side slope of embankment, enhance isolation, inhibit ground deformation, prevent crack by reflection, increase strength of roadbed.
Polymer Geogrid for Soft Foundation Strengthening construction method:
1.Geogrid's construction site:Request compaction,horizontal,clear spikes.
2.Geogrid paving:On a flat compacted site,the Geogrid laid by the device should be oriented perpendicular to the axis of the embankment,laid flat,without wrinkles,and tensioned as much as possible.With the nail and earth-rock pressure fixed,the Geogrid's primary direction of force is the best,the length is no joint,the connection between the web and the web can be manually tied and lapped,and the overlap width is not less than 10cm.If the Geogrid is set to be more than two layers,the layers should be staggered.After laying a large area,it is necessary to adjust the straightness.After filling a layer of soil,before the crushing,the Geogrid should be tensioned again with manual or machine tools,and the force should be even,so that Geogrid is strained in the soil.
3.For the selection of Geogrid packing:the packing should be selected according to the planning request.Practice has proved that in addition to frozen soil,marsh soil,day garbage,chalk soil,diatomaceous earth can be used as filler.However,the mechanical functions of gravel soil and sand soil are stable and have little influence on water content,so it should be preferred.Geogrid's filler particle size should not be greater than 15cm,and pay attention to the handling of the filler grading to ensure compaction weight.
4.Pagging and compaction of Geogrid filler:When Geogrid is laid and positioned,it should be filled in time to cover up.The exposure time must not exceed 48 hours.It can also adopt the flow-operating method of backfilling while laying.Spread the stuffing at both ends,fix the Geogrid,and push it toward the center.The order of rolling is first and then the center of the back.The roller can't be directly touched with the ribs when rolling,and the uncompacted reinforced body usually does not allow the vehicle to travel on it to avoid misalignment of the ribs.The partial lamination is 20-30 cm.It is necessary to meet the planning request for compaction,which is also the key to the success of reinforced soil engineering.
5.Geogrid's water-proof and drainage methods:In the reinforced soil project,it is necessary to make drainage treatment in the wall surface; to protect the feet and prevent erosion; Geogrid should set up filtration and drainage methods in the soil,if necessary,Geotextiles and permeable pipes should be installed.Adopting the method of digging Geogrid to drain,can not block,or it is dangerous.