Heat insulation anchoring structure for water conservancy dam polyurea anti-seepage coatings and construction method

A technology of anti-seepage coating and anchoring structure, which is applied in the fields of moisturizing, heat preservation and anchorage structure and construction, water conservancy concrete dam seepage prevention and heat preservation, and can solve the problems of foam ice damage, foam cracking, bulging, and peeling, etc., with little impact , protection of thermal insulation effect, the effect of small thermal insulation effect
CN107435318AInactive Publication Date: 2017-12-05STATE GRID CORP OF CHINA +3
9 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2017-12-05
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a heat insulation anchoring structure for water conservancy dam polyurea anti-seepage coatings and a construction method. According to the heat insulation anchoring structure, a threaded rod with the length of 30-150mm is fixed into a screw hole reserved by a concrete casting template through an inner screw at the bottom of the threaded rod, a dam concrete substrate is coated with a polyurea layer, a rigid polyurethane foam with the thickness of 20-100mm is sprayed on the polyurea layer, a glass fiber rib with the diameter of 4-10mm is bound in an intersected manner on the surface of the foam by part of the exposed threaded rod, a tray rapidly covers a threaded rod body by the aid of a structure of the threaded rod body, the glass fiber rib presses on the surface of the rigid polyurethane foam, a rigid polyurethane foam with the thickness of 10-50mm is sprayed on the glass fiber rib and the tray and completely covers the threaded rod, the glass fiber rib and the tray, and an ice-resistant layer with the thickness of 2-6mm is constructed on the foam. The anchoring structure solves the problems of peeling of the polyurea anti-seepage coatings from the dam substrate and cracking, bulging and ice resisting of the heat insulation polyurethane foam.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to anti-seepage, heat preservation and moisture retention technologies of water conservancy concrete dams, that is, a heat preservation and anchoring structure and a construction method suitable for polyurea anti-seepage coatings of water conservancy dams. Background technique

[0002] Most of the cracks produced by mass concrete such as dams are surface cracks. The main causes of surface cracks are drying shrinkage and temperature stress. The temperature stress is mainly the surface tensile stress caused by the increase of the temperature difference between the inside and outside of the mass concrete due to changes in the outside temperature such as cold waves and annual changes in the temperature in cold regions. Therefore, if appropriate and effective thermal insulation measures are adopted, the occurrence of concrete cracks will be greatly redu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More