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Construction function of Geogrid and treatment scheme of saving consumption

Author: Hengke Shandong HuaSu Engineering Co., Ltd Time: July 28, 2020 08:32 Visits: second
Description: the role of subgrade geogrid is to share part of the pressure for the highway. The deformation caused by the self weight of foundation soil construction is called settlement. Foundation settlement affects the safety and use of the upper part of the project. After the pressure is applied, the settlement velocity of different soil slopes is different. When the dry geogrid is compressed, the composite geogrid soil settlement is very fast, and the settlement can be stable for a long time.
 Geogrid Subgrade

Construction function of Geogrid and treatment scheme of saving consumption

Subgrade geogrid The construction function shared part of the pressure for the highway
In order to accelerate the foundation settlement, composite geogrid drainage and overload method are generally used to accelerate the drainage. Composite geogrid channel drainage is to use high permeability composite geogrid stone or gravel to build a circular drainage channel perpendicular to the ground in the saturated clay layer, and then lift the overload of predetermined weight. In the ex situ, the well cover covers the composite geogrid drainage channel. Due to the effect of load, the water in the soil body flows horizontally to the composite geogrid drainage channel, and then to the composite geogrid drainage channel In this paper, we will introduce the application of Geogrid in the construction of high permeable layer
 Construction of subgrade geogrid
The role of subgrade geogrid, the application of Geogrid for highway share part of the pressure, the deformation caused by the self weight of foundation soil building is called settlement. Foundation settlement affects the safety and use of the upper part of the project.
After the pressure is applied, the settlement velocity of different soil slopes is different. When the dry geogrid is compressed, the composite geogrid soil settlement is very fast, and the settlement can be stable for a long time.
However, the settlement of saturated clay is slow after compression, and it still does not stop sinking for a long time, which has a great impact on the construction project.
When the settlement of the gravel layer increases after the construction, the settlement of the composite foundation increases with the increase of the basic settlement. When some ancient tombs are saturated clay or fine-grained composite geogrid clay, the settlement after loading is very slow, and the settlement is still continuing after the completion of the project. Some of them will last for decades or even hundreds of years, which will bring adverse impact on the use of future construction projects.
The conventional method of composite geogrid drainage channel is as follows: the main pipe filled with the composite geogrid is driven into the compressible swimming stratum, and then the potassium pipe is extracted to leave the composite geogrid column in the stratum. The diameter of the composite geogrid drainage invitation is o.. 15-0.6m, and the spacing of drainage channels is 1.5-8m. However, the use of the geogrid drainage pipe is prone to the following problems:
(1) At the junction of the composite geogrid drainage channel and the soil, soil particles are easy to enter the holes of the composite geogrid, and then the composite geogrid is used to bond to make water enter the drainage channel.
(2) When the geogrid is deformed irregularly, it is easy to produce the shear stress in the composite foundation.
Composite geogrid can reduce radiation stress of highway
In practical use, the stress distribution radiates along different directions along the action point of the force when the highway is under concentrated load. Under the action of load P, the soil is in the tension range of about 17. The closer the soil is to the surface, the greater the stress is. In areas greater than 17 ° the soil is under pressure. When the composite geogrid is laid under the highway, the composite geogrid under the highway and within the range of 17 ° on both sides of the highway is in tension state. The compressive stress of the composite geogrid beyond this range mainly plays the role of clamping the intermediate composite geogrid.
The treatment scheme of saving the amount of one-way geogrid in subgrade construction
The unidirectional geogrid can be laid manually, tractor or automobile, or modified into special equipment. Combined with the experience of geocell manufacturer in building asphalt pavement highway, plastic panel should be selected before laying to maintain flat, tight, wrinkle free, active and tense power grid. The main results are as follows
(1) Nail can also be used to fix the bottom part of the grid at a distance of less than 2 meters. When the required tension grid, vertical and horizontal glass fibers are in tension straightening.
 Construction scheme of unidirectional geogrid
(2) The fixing nail which can not be placed on the glass fiber reinforced plastic can not directly affect the glass fiber hammered. The metal found after broken or loose fixing nails needs to be re fixed.
(3) When unidirectional geogrid is fixed, the rolling roller of rubber tire should be mild, and the original structure and bonding of grid layer should be stable.
(4) Overlapping grid distance: the longitudinal overlapping distance is not less than 20 cm, and the transverse width of the ring is not less than 15 cm. The overlapping length direction shall be set at the front roof according to the asphalt.
The above is Shandong HuaSu Engineering Materials Co., Ltd. professional and technical personnel for your detailed introduction of the role of subgrade geogrid construction and save the amount of treatment scheme, I hope to help you, if you have the demand of Geomembrane in this respect, please contact us or visit our factory directly to order!