On a construction site, sand application of glass tube, the precondition of step, is the installation of glass sand pipe trench excavation of glass steel sand tube how to dig, dig sand flat glass steel pipe trench excavation, how to handle different soil, can be made to ensure the success of glass steel sand tube sand glass steel pipe installation.

Then, the trench excavation of THE FRP sand tube is mainly carried out in the open excavation, with a ladder shaped cross section, about 10 ~ 15m wide and 4.5m deep. During the construction of the project, the operation procedure of stratified excavation from top to bottom was adopted. The bottom of the pipeline was excavated first, followed by the excavation of the side slope protection, and the thickness of the stratified excavation was 0.5-1m. The following points should be noted during excavation:

Before the excavation of the trench of FRP sand pipe, the investigation should be carried out according to the operation requirements, and the situation of the spot topography, topography and geomorphology, building construction, various pipes and other equipment along the pipeline should be grasped, as well as the hydrogeology, geological structure materials and drainage pipe standards, and the drainage pipe plan should be formulated. If the ground water of the project is high, use well drainage pipeline plan to reduce the ground water. The discharged water shall be transported beyond the scope of the pump hazards, and shall not interfere with traffic and damage roads, fields, embankments and other buildings.

When the FRP sand pipe passes through the green or field section, the FRP sand pipe first breaks away from the cultivation soil within the range of 0 ~ 80cm on the ground and accumulates independently. If the cultivated soil is less than 80cm, separate according to the specific thickness. During the whole process of excavation, the excavation depth was immediately controlled to 1 to avoid deep excavation. Sand glass steel pipe trench excavation construction should immediately after repair of glass sand pipe trench excavation axis and elevation, manipulation setting slope plate is used to conduct elevation, the axis control, check the slope plate setting anytime and anywhere and elevation is sand glass steel pipe, guarantee of glass sand pipe trench excavation axis, gradient and ancillary buildings parts properly.

The slope protection should be defined according to the soil layer of THE EXCAVATION of THE GFRP sand pipe trench. When necessary, the excavation wall of the GFRP sand pipe trench should be set with support or rain shield, and the emergency plan should be formulated. Mechanical equipment is used for earthwork backfill excavation, and the bottom of the groove is pre-buried 20cm and cleared by manpower. Deep digging is forbidden during the whole excavation process to prevent the roadbed from shaking. Times is the groove excavation of glass steel sand tube to carry out the basic solution, the sand glass steel pipe trench excavation after basic product quality inspection pass, can will not be the same level of pressure piping to the pile number concentration of discharge, and check the pipe culvert, pipe material, FRP sand inclusion when you install a crane tube into the trench, to carry out simple installation. The following two points should be paid attention to when excavating the trench of FRP sand tube:

When the bearing capacity of pipe-base soil layer is 80 ~ 100kPa and non-rock layer, original soil should be used as the basic; When the bearing capacity of soil layer is 50 ~ 70kPa, the compacted original soil should be used as the base, and the compacted relative density should be 95%. In case of sludge, river pebbles, rock formation, hard soil, irregular gravel and soaked soil, 50cm thick gravel cushion should be backfilled, and the relative compactness of foundation cushion should not be less than 0.67. For fiberglass reinforced plastic sand tube, 150mm thick coarse sand cushion is laid at the bottom of the layer, and the basic cushion shall be laid at one time. The symmetrical beach shall be leveled, and the density shall not be less than 0.65. The pipe foundation structure should be strengthened according to the design plan when the pipeline passes in poor geological environment.