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Discussion on Construction Method of Drainage Network

RELEASE TIME :

2021-07-23 12:06

The drainage network is mainly used for drainage of landfills, roadbeds and inner walls of tunnels. In the transportation infrastructure such as railways and highways, the safety and service life of the project are closely related to the self-drainage system, and the earthwork composite material is an important part of the drainage system.

The construction method of the drainage network:

浅谈排水网的施工方法

1. The drainage sheet should be laid flat on the site according to the design requirements, and connected when the length of the drainage site exceeds the length of the drainage sheet. The connection method is nylon buckle, and the distance between nylon buckle is 8 ~ 10 cm. The width direction does not need to be connected.

2. To clean and clean the place to be constructed, there should be no floating soil, stones, concrete protrusions or other sharp objects.

3. After the drainage pad and water guide block are installed, lay earthwork fabrics. When the two earthwork fabrics overlap, the overlapping width should not be less than 200 mm.

4. Set the induction block on the retaining wall or the wall. The induction block mainly plays the role of collecting rainwater and discharging water from the drain. Derivative blocks are cut into plastic permeable drainage boards with a width of 100-200 mm and a thickness of 50 mm. The installation length is determined by the drainage field width.

Matters needing attention in drainage network construction:

A. The three-dimensional composite drainage net and composite waterproof board cannot be polluted during loading and unloading, and cannot be thrown to prevent mechanical damage (such as sharp object hooks, stabs, tears, etc.) and medium and long-term direct compression to prevent damage or injury .

B. Composite drainage nets and composite waterproof boards should be kept away from heat sources and gardens, and stored in a ventilated and dry place. Avoid direct exposure to corrosive substances and avoid prolonged exposure.

C. During construction, damage to the geotextile should be avoided as much as possible, and strictly monitored. If damage is found, it should be replaced or repaired in time.

The sand and pebble filter layer of traditional supporting structures such as retaining walls, which replace the sand and pebble filters of retaining walls and other supporting structures, has an Achilles' heel that is difficult to control in quality, which is the main reason for the failure of internal drainage systems of many supporting structures such as retaining walls, and is also the main reason for engineering One of the common problems of quality. Laying composite drainage boards on retaining walls can replace or partially replace natural materials such as gravel, and it is an effective engineering measure to ensure or enhance the drainage effect.

The composite drainage board is laid on the retaining wall, and the earthwork membrane of the composite drainage board leans against the retaining wall and is placed along the vertical direction. To test hydrogeological conditions, it may be laid continuously or at intervals along the length of the retaining wall. Composite drainage boards can be fixed to retaining walls with cement nails.

1. Composite drainage net is a plastic drainage net, which is a composite earthwork material covered with pitcher-shaped earthwork cloth, which has the functions of filtration, water permeability and drainage.

2. After the barrier is excavated by the temporary slope, the slope shall be leveled first, and then fixed against the composite drainage net. Before pouring the flake concrete into the retaining wall, the composite drainage network should be sealed against the wall with a decomposable isolation ground to prevent the grout from penetrating the composite drainage network.

 

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