CN202543949U

CN202543949U - Drainage geogrid

Info

Publication number: CN202543949U
Application number: CN2012200705047U
Authority: CN
Inventors: 沈建; 楼峰; 张树灿; 曹晓鸣; 黄晓峰
Original assignee: HANGZHOU ZONGDA CONSTRUCTION CO Ltd; JIANWEI CONSTRUCTION CO Ltd
Current assignee: HANGZHOU ZONGDA CONSTRUCTION CO Ltd; JIANWEI CONSTRUCTION CO Ltd
Priority date: 2012-02-29
Filing date: 2012-02-29
Publication date: 2012-11-21
Anticipated expiration: 2022-02-28

Abstract

The utility model relates to a drainage geogrid which is characterized by comprising a horizontal drainage grid reinforced belt and a longitudinal grid reinforced belt, wherein the horizontal drainage grid reinforced belt and the longitudinal grid reinforced belt are crossed so as to form a meshed structure and fixed by virtue of hot melting or an adhesive, a U-shaped nail or an orogenic-type nail. The horizontal drainage grid reinforced belt takes a zigzag core board as a substrate, a horizontal meshed reinforcing rib is laid on the zigzag core board and fixed by virtue of hot melting or an adhesive, and after steel wires longitudinally interpenetrate in the zigzag core board, the zigzag core board is integrally wrapped with a geotextile filter membrane, and a slotted drainage channel is formed between adjacent sawtooth boundaries. According to the utility model, the prepared unidirectionally drained and bidirectionally reinforced drainage geogrid not only has a good reinforcing effect, but also has good water suction and drainage performances, thereby ensuring that water on the surface of a foundation can conveniently drain to side ditches on both sides of the foundation, accelerating the consolidation of soft soil, and shortening the pre-compression period and the construction period.

Description

A kind of drainage type GSZ

Technical field

The utility model relates to a kind of drainage type GSZ, particularly a kind of single slope drainage that is combined by transverse drainage grill reinforce band and vertical grill reinforce band, the drainage type GSZ of two-way reinforcement.Belong to the treatment of soft foundation field, be applicable to that the ground in the engineerings such as embankment, dykes and dams, barricade is handled.

Background technology

Soft base processing method commonly used at present has compound foundation method, consolidation etc., the bed course about 50cm need be set on the face of land, and horizontal reinforcement material is set in bed course, is referred to as reinforcement cushion.Reinforcement cushion has diffusion-induced stress, impels performance inter-pile soil bearing capacity, and as transverse row water body performance drain function, quickens the fixed and sedimentation of soft base; Practice shows that the horizontal reinforcement material of increase can obviously reduce differential settlement in foundation treatment engineering.

Generally speaking; Horizontal reinforcement material is a net structure, and the maximum particle diameter of bed course particle is less than the mesh of horizontal reinforcement material, like GSZ, geotextiles etc.; Main as reinforcement; Do not possess drain function, wherein the GSZ application is comparatively extensive, and GSZ commonly used has plastics GSZ, glass GSZ, steel to mould GSZ, monolithic steel wire GSZ etc.In theory, the net structure of horizontal reinforcement material makes bed course gather materials interlocking and restriction, has not only improved upper load to the even ability of diffusion of ground, also makes ground can bear certain horizontal loading, has improved the stretch bending ability.But in actual engineering; There is a certain amount of water in the bed course, can't in time gets rid of, weakened the interlock action and the frictional force of reinforcement material and bed course greatly; The horizontal bearing and the ability of transmitting upper load of horizontal reinforcement material have been weakened; Cause simultaneously can't in time discharging after water drains into the face of land in the ground, delayed the concretion of soft foundation time, cause precompressed phase and construction period to prolong.

Present having is layed in the plastic draining plate level in the bed course, quicken the application example of bedding course drainage effect, but common plastics band drain resistance to tension is limited; Easy fracture or breakage in embankment and dykes and dams roller compaction construction process; The draining central layer is prone to produce moderate finite deformation when overlying burden is big, when the also drainage effect of inaccessible anticipation, plastic draining plate level are layed in the bed course and use as water discharging body; Compare with using as vertical drainage body; It is stressed and be out of shape existence than big difference, and structure and material require design again, and at present about research is still few in this respect.

In sum, need a kind of GSZ with suction water function of invention at present badly, the water that helps foundation surface drains into the both sides gutter, when improving the reinforcement cushion effect, quickens the fixed of foundation soil.

Summary of the invention

The purpose of the utility model is in order to overcome the defective that common GSZ does not have drain function, reinforcement cushion drainage effect difference; And a kind of drainage type GSZ is provided; Be easy to the water that reaches foundation surface in the bed course is drained into the both sides gutter; Quicken the fixed of weak soil, shorten precompressed phase and construction period.

To achieve these goals, the utility model has adopted following technical scheme:

A kind of drainage type GSZ is characterized in that comprising transverse drainage grill reinforce band and vertical grill reinforce band, and both are combined to form net structure at vertical the setting.Both fixed forms are hot melt, adhesive, U sprig or mountain sprig.

Aforesaid drainage type GSZ is characterized in that transverse drainage grill reinforce band comprises geotextiles filter membrane, horizontal mesh reinforcement, zigzag central layer, teeth groove drainage channel, steel wire; The zigzag central layer is a base material, lays the horizontal mesh reinforcement above, and in central layer, vertically interts behind the reinforcement, and integral coating geotextiles filter membrane forms.

Aforesaid drainage type GSZ is characterized in that described geotextiles filter membrane material is non-woven geotextile, spins geotextiles or composite earthwork cloth is processed, and described method for coating is Method for bonding or sewing.

Aforesaid drainage type GSZ; It is characterized in that described horizontal mesh reinforcement material is a high molecular polymer; Like polypropylene, polyvinyl chloride or polyvinyl a kind of or the combination process through thermoplastic or mold pressing, profile is the two-dimensional mesh trellis, can add high tensile steel wire or other fibers.

Aforesaid drainage type GSZ is characterized in that described zigzag central layer bottom surface is smooth, the end face indentation, and each sawtooth top is whittled into the plane, and the sawtooth border constitutes the teeth groove drainage channel of triangulo column shape, and material is macromolecular materials such as PE, HDPE.

Aforesaid drainage type GSZ is characterized in that described horizontal mesh reinforcement and zigzag central layer adopt hot melt or adhesive to carry out bonding.

Aforesaid drainage type GSZ is characterized in that described interspersed reinforcement is a steel wire, but the coating ethylene coating.

Aforesaid drainage type GSZ is characterized in that described vertical grill reinforce band is traditional vertical reinforced bands of common GSZ, promptly can be plasticine worker grid, glass GSZ, steel and moulds GSZ, monolithic steel wire GSZ muscle band.

Existing geotechnological reinforcement material only can transmit load; The simple function that reinforcement is promptly only arranged, the utility model can in time drain into the both sides gutter with water in the bed course, effectively improves interlocking, the interlocking of reinforcement bearing surface; Strengthen the bearing capacity of ground, the lateral displacement of the operative constraint soil body; Strengthen the firm performance of ground, can quicken the fixed of weak soil simultaneously, shorten precompressed phase and construction period.

Description of drawings

Fig. 1 is the plan view of the utility model drainage type GSZ;

Fig. 2 is a transverse drainage grill reinforce band viewgraph of cross-section.

The part description of main mark among the figure: 1-geotextiles filter membrane, 2-horizontal mesh reinforcement, 3-zigzag central layer, 4-teeth groove drainage channel, 5-high tensile steel wire, 6-transverse drainage grill reinforce band, 7-vertically grill reinforce bands.

Specific embodiment

Fig. 1 is the plan view of the utility model drainage type GSZ; With reference to shown in Figure 1; The drainage type GSZ is to mould the single slope drainage that vertical grill reinforce band 7 combines, the net of two-way reinforcement by transverse drainage grill reinforce band 6 and steel, and both adopt the bonding back of bonding adhesive to fix with the U sprig.Transverse drainage grill reinforce bandwidth is 80mm, and vertically grill reinforce band 7 adopts general steel to mould the GSZ reinforced bands, muscle bandwidth 15mm, tensile strength>=80kN/m, fracture elongation≤3%.

Fig. 2 is a transverse drainage grill reinforce band cross section, and with reference to shown in Figure 2, transverse drainage grill reinforce band 6 is made up of geotextiles filter membrane 1, horizontal mesh reinforcement 2, zigzag central layer 3, teeth groove drainage channel 4, steel wire 5.Be to be base material, lay horizontal mesh reinforcement 2, and in central layer, vertically intert behind the steel wire 5, coat geotextiles filter membrane 1 and form with zigzag central layer 3.

Geotextiles filter membrane 1 is homemade terylene impregnated membrane, thickness 4.0mm, filter membrane dry state endwise tensile strength>=20 N/cm, filter membrane hygrometric state endwise tensile strength>=15 N/cm, filter membrane transmission coefficient>=5 * 10 ^-3Cm/s, the filter membrane effective aperture<75 μ m are closed with Method for bonding during coating.

It is raw material that horizontal mesh reinforcement 2 adopts polypropylene (PP), form through plasticizing extrusion board, punching, heating, longitudinal stretching, cross directional stretch, and mesh size 25mm * 25 mm, width 80mm, wide with transverse drainage grill reinforce band.

Zigzag central layer 3 bottom surfaces are smooth; The end face indentation, tooth angle is scabbled at each sawtooth top, and adjacent sawtooth side constitutes the teeth groove drainage channel 4 of triangulo column shape; Can adopt the PE material to process, every transverse drainage grill reinforce band 6 is provided with 3 teeth groove drainage channels 4.Horizontal mesh reinforcement 2 is compound with zigzag central layer 3 hot melts.

Steel wire 5 is interspersed in the zigzag central layer 3, forms the reinforcement material of transverse drainage grill reinforce band 6, steel wire 5 coating ethylene coatings, and diameter is 2.5 mm, vinyl finish thickness 0.3 ± 0.1 mm

Claims

1. a drainage type GSZ is characterized in that comprising transverse drainage grill reinforce band and vertical grill reinforce band, and both arranged crosswise form net structures, and adopt hot melt, adhesive, U sprig or mountain sprig to fix.

2. drainage type GSZ according to claim 1 is characterized in that transverse drainage grill reinforce band comprises geotextiles filter membrane, horizontal mesh reinforcement, zigzag central layer, teeth groove drainage channel and steel wire; Be to be base material with the zigzag central layer, lay the horizontal mesh reinforcement above and adopt hot melt or adhesive, and in central layer, vertically intert behind the steel wire that integral coating geotextiles filter membrane forms, adjacent sawtooth border constitutes the teeth groove drainage channel.

3. drainage type GSZ according to claim 2 is characterized in that described geotextiles filter membrane is non-woven geotextile, spins geotextiles or composite earthwork cloth, and described method for coating is bonding or sews up.

4. drainage type GSZ according to claim 2 is characterized in that described horizontal mesh reinforcement, zigzag central layer material are macromolecular material; Wherein the horizontal mesh reinforcement is the two-dimensional grid structure; Zigzag central layer bottom surface is smooth, the end face indentation, and each sawtooth top is whittled into the plane.

5. drainage type GSZ according to claim 4 is characterized in that the material adding high tensile steel wire of described horizontal mesh reinforcement is fiber reinforced.

6. drainage type GSZ according to claim 2 is characterized in that described interspersed Steel Wire Surface coating ethylene coating.

7. drainage type GSZ according to claim 1 is characterized in that described vertical grill reinforce band is that plastics GSZ, glass GSZ, steel are moulded GSZ, monolithic steel wire GSZ muscle band.