HDPE geomembrane landfill construction process
1. When the project started, it should have the following conditions:
1.1 materials have all arrived on-site; or the owner's consent in batches arrive, the arrival process to ensure the progress of the installation, the first arrival of materials can satisfy the needs 10-15 days to install; materials were delivered to the site.
1.2 materials have been witness sampling, plastic products through quality testing, identification of qualified department made a major review of the material properties testing, the indicators are not lower than the data design and factory inspection certificate.
1.3 Press 'construction design' requirements are established and workers as well as site manager of the various devices are in place.
1.4 impermeable grassroots has been the owners, supervision of the inspection, in line with the conditions of impermeable layer design requirements.
2. Construction Program
2.1 If the tight schedule requirements engineering, scientific and reasonable construction schedule of the essential arrangements to ensure the construction of a balanced, orderly and streamlined, namely the construction segment with each other, but each segment independently within the assembly line, Segment drill laying installation, turn layers forward, combined with the construction of cross-parallel operations.
The general principles laid landfills order impermeable layer of geotextile material is 'top to bottom, the first after the end of the slope field'.
Anchored to the slope of a point (after winning the specific location, according to the actual situation at the scene before the start of the civil substrate separately), by one direction in order to expand Face. On the road should be as compact as possible between the step and the next step, do not apart for too long, to avoid unnecessary rework, as long as the procedure provides sufficient working surface, the next step should be constructed immediately, people leaving the various inter-related steps, equality simultaneous construction. Meanwhile, the geotextile Materials should lay day inspection day, for the next step of the construction, inspection results become part of the final acceptance.
2.2 division, pipeline construction segment
According to the characteristics of the project, in accordance with the general principle of construction 'after the first on the lower' the construction sequence assembly-line organization, compact on the road as much as possible between the step and the next process, not apart for too long, to avoid unnecessary rework, as long as step on the road to the next process provides sufficient working surface, the next step should be constructed immediately.
3. Construction of the main process
3.1 HDPE geomembrane installation program and process requirements
3.1.1 geomembrane installation should have the conditions:
A; materials have been sampling inspection; its technical indicators meet the design requirements;
B; machinery and equipment has been debugged overhaul; the power is turned on;
C; before a process has been completed and construction inspection; acceptance;
D, construction technology program has been approved;
E; site coordination meetings have been convened; each with the unit is ready;
F, climatic conditions meet the requirements of geomembrane construction:
The requirements for the weather: the temperature should normally be between five to forty degrees Celsius, when the low temperature geomembrane should be some tension, high temperature geomembrane should relax more, when the temperature is too low, 4 or more wind and rain should not generally construction. In windy weather, wind impact during the construction geomembrane, HDPE geomembrane welding applications pending sand bags pressure prison.
G, using the standard
(Polyethylene (PE) Geomembrane engineering technical specifications) (SL / T231-1998)
(Geosynthetics application specifications) (GB50290-1998)
(Geosynthetics testing procedure) (SL / T235-1999)
3.1.2 storage, transport and handling HDPE geomembrane
HDPE geomembrane volume expansion before installation to avoid damage ring .HDPE geomembrane volume should not water stacked in place by the formation of high height does not exceed four volumes, and can see the identification plate volumes in the storage process To keep the label intact and legible.
During transport; including on-site materials from storage sites to workplace transport; HDPE geomembrane volume must avoid damage (including the web shipped from the venue of the storage site to the work area).
HDPE geomembrane is physically damaged and must be repaired. Seriously damaged HDPE geomembrane (entire volume or part) can not be used.
3.1.3 HDPE geomembrane construction methods
Geomembrane construction welding methods are mainly two kinds: double seam heat welding and single slit extrusion welding, its operation should comply with the relevant regulatory requirements.
18.104.22.168 double seam welding welder construction procedures and process requirements:
Engaged in environmental engineering jobs HDPE geomembrane welding division welding personnel must be Intermediate or above the intermediate welders. If the primary welder must have intermediate or intermediate level welders in the side guidance, monitoring, surveillance by the signature.
i, engaged in heat welding, depending on the installation conditions, usually 2-3 individuals as a group, including at least one mid-level or mid-level Division of weld welder responsible. Tai'an City Rui Heng geotextile material Ltd. professional production geomembrane, waterproof blanket, geomembrane, drainage board, GCL, geomembrane, sodium bentonite waterproof blanket, waterproof coating blanket, geomembrane, HDPE geomembrane, waterproof blanket, impermeable geomembrane, geotextile, drainage board , impermeable membrane, GCL GCL, geomembrane, steel geogrid.