Work Guidance for Applying Yunnan EVA Waterproof Membranes (Absolutely Practical Tips!)
Release date:
2020-09-12
③ When the anchor rod has protruding parts, leave a预留 at the screw head. sui Precautions for road drainage and waterproofing operations, Kunming, Yunnan EVA Waterproof membrane Sharing insights on three aspects: pre-construction preparation and specific construction guidelines.
1. sui Road drainage and waterproofing operations should pay special attention to the following aspects:
1、 sui The tunnel's drainage and waterproofing system should adhere to the principle of "prevention, sealing, interception, and drainage—tailored to local conditions and addressing both surface and groundwater comprehensively"—ensuring proper management of both types of water to create a fully integrated drainage and waterproofing system inside and outside the tunnel.
2、 sui Waterproofing of tunnel structures should prioritize the initial support system, supplemented by grouting for waterproofing and reinforcing the waterproof layer to meet structural design and service requirements.
3、 sui Road structure waterproofing should focus on construction joints and expansion joints. middle Point: Take reliable waterproof measures. sui The tunnel structure should enhance the self-waterproofing performance of the lining concrete, and the impermeability grade of the secondary lining concrete must not be lower than P6 , the waterproof concrete used in the design must have a permeability resistance grade of no less than P8。
4 Railway sui The road structure drainage and waterproofing construction work refers to activities carried out at sui Initial tunnel support has been completed, and sui Structural waterproofing and drainage work, conducted after the Daqingkong tunnel passes inspection and meets design requirements, typically includes base surface inspection and treatment, as well as drainage blind pipes. ( Ditch ) Installation, Kunming, Yunnan EVA Construction processes include waterproofing membrane installation, treatment of construction and expansion joints, and concrete pouring.

2. Kunming, Yunnan EVA Waterproof membrane Pre-construction preparation of the base surface and drainage blind pipe installation guidelines:
1 Base surface inspection and construction handling
Base surface treatment primarily addresses seepage water on the initial support surface, as well as exposed protrusions and any uneven or irregular areas.
(1) To address groundwater leakage in the foundation, backfill grouting is used to seal off water flow, ensuring that the foundation remains free of significant leaks.
(2) Remove any hard objects such as exposed anchor head and rebar tips protruding from the surface of the initial support concrete.
① For protruding parts like mesh, first cut them off, then flatten and smooth with mortar or plain plaster using a hammer.
② For pipes with protrusions, first cut them off, then smooth the area with mortar.
③ When the anchor rod has protruding parts, leave a预留 at the screw head. 5mm After cutting, finish with a plastic cap.
④ Address irregularities on the initial support surface to ensure a smooth concrete finish, with the uneven areas meeting the specified requirements. D/L = 1/6 to 1/10 (D)
For the indentation between two convex surfaces shen Degree, L For the distance between two convex surfaces )
(3) Quality Inspection Requirements for Base Surface Treatment
① The initial support surface shows no obvious water leakage, and there are no signs of hollowing, cracking, or crumbling.
② The initial support surface is smooth, using 2m The ruler is inspected, and its flatness ≤ 5cm。
③ The initial support surface has no sharp protrusions such as rebar or exposed pipe fittings.
2 Drainage Pipe Installation
Drainage blind pipes typically include circumferential drainage blind pipes, longitudinal water-collecting blind pipes, and lateral drainage pipes—these three components are integrated using a variable-diameter tee joint.
Establish a complete drainage system. Among them, the longitudinal drainage blind pipes run throughout the entire sui The drainage system acts as an intermediate link, serving to connect the upper and lower sections—it’s a critical component.
3. Kunming, Yunnan EVA Waterproof membrane Construction operations
After completing the base surface treatment, drainage blind pipe installation, and horizontal construction joint waterstop strip installation, proceed with Kunming, Yunnan EVA Waterproof membrane Construction operations typically include preparation for laying, installation of the cushion layer, fixing the waterproof membrane, and the waterproof membrane itself. Han Processes such as receiving and quality inspection.
(1) Laying-out preparation
Quality of the backfill material board, Kunming, Yunnan EVA Waterproof membrane High-polymer materials are recommended, with a typical width of 2–4 meters
Among them, passenger and freight lines share the same track. sui The waterproofing membrane must be at least as thick as 1.2mm , the waterproof membrane for passenger-dedicated lines must be at least as thick as 15mm , puncture-resistant It is permeable, flexible, highly durable, and must meet design specifications. Materials have been inspected and approved in Kunming, Yunnan. EVA Waterproof board, marked with a special pencil Han Connect the wiring and mark the arch centerline, then cut each section according to the designed length for each cycle, folding them symmetrically for future use. Inside the tunnel, mark the arch centerline on the prepared base surface and draw it clearly. sui Midline of the road di First Ring and Vertical sui Underlining the path: Material cutting and sui Route layout location.
(2) Buffer layer paving
For designs intended to be modular Kunming, Yunnan EVA Waterproof membrane First, lay down the buffer layer; the material for the buffer layer should be selected according to the design, and it is typically fixed using nail guns.
ZHONGTAI HENGBANG Engineering Technology Co., Ltd. is a comprehensive service provider integrating engineering consulting and design, material R&D and manufacturing, as well as operations and maintenance. With robust technical expertise and strong R&D capabilities, our products are prominently applied in critical areas such as hydraulic infrastructure projects, transportation infrastructure initiatives, and environmental protection fields like urban waste management and the safe isolation and impermeability of hazardous industrial solid wastes. The company boasts advanced production lines sourced from Germany, Italy, Denmark, Belgium, Switzerland, and other countries, adhering to stringent quality management systems and rigorous testing standards. We are equipped with state-of-the-art equipment capable of evaluating key performance characteristics—including tensile strength, creep resistance, UV resistance, water permeability, flame retardancy, antistatic properties, chemical corrosion resistance, and oxidation stability—ensuring that every product meets the highest industry benchmarks. Furthermore, our enterprise has successfully obtained prestigious certifications such as CRCC, ISO 9001, ISO 14001, OHSAS 18000, and MA certification. We also hold inspection reports from China’s Ministry of Railways and Ministry of Water Resources, along with the EU CE certificate, and have undergone specialized laboratory testing in regions including Russia, Australia, and the United States. Committed to delivering top-tier geosynthetic materials and unparalleled service, we proudly support a wide range of projects, including reinforced earth retaining walls, soft ground stabilization, land reclamation cofferdams and their maintenance, hydraulic engineering works, slope remediation and ecological restoration, road construction, and mining projects.
Consultation Phone: 13953856388
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