CN2447391Y

CN2447391Y - Composite reinforced earth work space grid

Info

Publication number: CN2447391Y
Application number: CN 00259064
Authority: CN
Inventors: 钱德成; 李涛
Original assignee: RESIN APPLICATION INST YANHUA PETRO-CHEMICAL CORP Ltd BEIJING
Current assignee: RESIN APPLICATION INST YANHUA PETRO-CHEMICAL CORP Ltd BEIJING
Priority date: 2000-11-10
Filing date: 2000-11-10
Publication date: 2001-09-12
Anticipated expiration: 2010-11-10

Abstract

The utility model relates to a composite ribbed earth work geogrid chamber, which is a group of composite plate strips using metal nets as rib materials to be together packed with high molecular polymer materials, wherein, the plate strips are mutually oppositely arranged and are welded together in a welding areas, and welding points are arranged from one plate strip to another plate strip in a staggered way. Thus, a plurality of plate strips are unfolded along the vertical direction to the plate strips, the plate strips can form a three-dimensional netted structure. The utility model has the advantages of high tensile strength and compressive strength, and firm welding points, and the utility model is an ideal product for enhancing the bearing ability and the stability of protective objects.

Description

A kind of composite reinforced type geotechnical grid

The utility model relates to a kind of geotechnical grid, particularly a kind of composite reinforced type geotechnical grid.

In engineering constructions such as roadbed, dykes and dams, bank protection, soft foundation, when earth stress is big, accident such as deformation, displacement can take place, ftracture, cave in, geotechnical grid is used to renovate slope failure, roadbed is handled, aspects such as dykes and dams protection are effective, and it can improve the supporting capacity and the stability of protective substance.In recent years, the geotechnical grid that existing plastic sheet welding is made, the utility model patent of the applicant's application in 97 years, " compound fabric type perforate plastic sheet geotechnical grid " patent No.: 97221293, this geotechnical grid is formed the boxwork structure by plastic sheet, compound layer of non-woven fabric on the plastics slip, it can prevent flowing of institute's underfill material, strengthened the stability of institute's underfill material, but any product all has the limitation of its use, as this geotechnical grid in handling rigidity sudden change engineering, the position that image height position abutment is connected with the new and old basis of high embankment, this moment, geotechnical grid not only needed strong cohesion to keep cushion layer structure, will bear huge shear stress and tensile stress simultaneously, and the equal head it off well of existing geotechnical grid.Patent " a kind of novel geo-grid " patent No. and for example: 98229728.9, this patent is a stress unit with high strength drawing-off shape strip, plastic tape simultaneously is suppressed with coarse lines, another side is suppressed with the strip sealing wire, plastic tape is vertically and horizontally arranged into the plane trellis, because this product is a plane structure, can only carries the pressure of direction in length and breadth, but can not solve the pressure of soil erosion and carrying above-below direction.

The purpose of this utility model is to provide a kind of loss that can prevent objects such as earth sandstone, has the novel geotechnical grid of the measuring body reinforcement type of very strong tension again.

The purpose of this utility model realizes in the following ways: high molecular synthetic material is squeezed in the wire lath upper and lower surface close, form compound slip, then one group of compound slip is interlocked Face to face in twos and be welded, welding position at compound slip is removed the polymer composite covering layer earlier, exposing the wire lath material contacts the metalwork of weld zone well, adopt common metal welding method commonly used then, with Metal Material Welding together, meanwhile the heat that forms during weld metal can melt the macromolecular material around the metal weld bond, under pressure, weld bond is wrapped in the macromolecular material again.After welding is finished,, when outwards stretching slip, can form a kind of lattice chamber with stereoscopic grid structure when perpendicular to compound slip direction.The length of weld seam is exactly the width of slip, and the length of each compound slip is 100～600cm, and lattice chamber height is 5～20cm, the thickness 0.1～0.2cm of compound slip, and each is 1/10～1/80 of a compound slip length to the distance between the compound slip weld seam.Can fill out the inside with various geotechnological materials such as sand, gravel, granular soil and table soil vegetable material etc. in the grid also can fill out in the graticule mesh with concrete, cement or pitch.

Composite reinforced type geotechnical grid is done the muscle material because of there is wire lath the centre, this geotechnical grid is had bear very strong shear stress and tensile stress ability, has guaranteed structural stability and good tension crushing resistance in the geotechnical grid.The Joint Strength of geotechnical grid also strengthens than the geotechnical grid of no metal reinforcement, and this geotechnical grid has improved road foundation, side slope protection, and the base support structure of shelves cob wall etc. improves bearing capacity.

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is that composite reinforced type geotechnical grid launches schematic diagram

1. wire laths, 2. sheet surface 3, weld zone among the figure

Fig. 2 forms slip schematic diagram behind the composite reinforced type geotechnical grid cleaning weld zone

Get the polypropylene material that adds modifier, render in the extruder, long 400cm, wide 15cm, the steel mesh of thickness 0.15cm is extruded jointly through the composite machine head of extruder, form metal composite reinforcement matrix bar, get 50 of slips then and form one group, use metal high frequency spot welding utensil with the staggered in twos welding of slip, distance on the every pair of slip between the weld seam is 40cm, and weld width is consistent with the slip width, after welding finishes, on vertical and slip direction, exert pressure, can form the geotechnical grid of network as shown in Figure 1 after the expansion.

Claims

1. compound geotechnical grid of reinforcement, it is characterized in that adopting a plurality of compound slips, this slip is to do the muscle material by wire lath, extrude the composite material that forms jointly with macromolecular material, slip is arranged face-to-face mutually, welds together in the weld zone, and these pads are staggered to another slip from a slip, make with a plurality of slips when the slip vertical direction is launched formation stereoscopic grid structure.

2. according to the compound geotechnical grid of a kind of reinforcement under the claim 1: it is characterized in that macromolecular material is that modified poly ethylene or polypropylene are made.

3. according to the compound geotechnical grid of a kind of reinforcement under the claim 1: the wire lath that it is characterized in that compound slip is a steel mesh.