CN215482749U - Prevent frostbite and melt canal lining structure - Google Patents

Abstract

The utility model relates to the technical field of canal lining of hydraulic engineering, in particular to an anti-freezing and anti-melting canal lining structure. The utility model provides a prevent frostbite and melt channel lining cutting structure, includes the medium coarse sand layer of bottom, lays the compound geomembrane that is used for the prevention of seepage on the medium coarse sand layer, lays the sand gravel bed course that is used for preventing frostbite and bloates on compound geomembrane, lays the heated board that is used for keeping warm on the sand gravel bed course, brushes on the heated board and is used for increasing the adhesive force with the concrete layer, pours the frost resistant concrete layer on the adhesive layer. By adopting the anti-freezing concrete layer, the anti-freezing capacity is improved, and cracks are not easy to generate after freeze thawing damage; by adding the adhesive layer, the bonding force of the heat-insulating plate and the anti-freezing concrete layer is improved, the condition that concrete falls off is greatly reduced, and potential safety hazards are eliminated; polystyrene cystosepiment can play the heat preservation effect, and the gravel stone bed course can play the effect of anti-freeze bloated, greatly increased the intensity of channel lining behind the whole cooperation.

Description

Prevent frostbite and melt canal lining structure

The technical field is as follows:

the utility model relates to the technical field of canal lining of hydraulic engineering, in particular to an anti-freezing and anti-melting canal lining structure.

Background art:

in the hydraulic conveying engineering, the channel lining is influenced by factors such as water flow, air temperature, wind, rain, cold winter and the like, is easy to age and damage, and is particularly damaged greatly due to freeze thawing circulation, so that great potential safety hazards are brought to engineering operation. The concrete is obviously characterized in that the surface is peeled off and stone aggregate is exposed, the concrete is cracked by freezing stress in the freezing process, and the cracks generated by freezing are generally numerous and fine, so that thicker and larger cracks can not be seen in the situation of simple freezing and thawing damage. However, when freeze thawing is repeatedly alternated, these fine cracks are continuously propagated and interconnected, and the surface mortar or clean mortar is detached. The freeze-thaw damage not only causes the concrete surface to be peeled off, but also causes the concrete mechanical property to be obviously reduced, and a large number of experimental researches show that: along with the increase of the cycle of the freezing and thawing times, the strength characteristics of the concrete show a descending trend, wherein the most sensitive is the tensile strength and the breaking strength, namely along with the increase of the freezing and thawing times, the tensile strength and the breaking strength of the concrete are rapidly reduced, so that the concrete is cracked and falls off until being seriously damaged.

Therefore, how to improve the antifreezing performance of the canal lining becomes a technical problem which needs to be solved urgently in the industry.

The utility model has the following contents:

in order to make up for the defects of the prior art, the utility model provides an anti-freezing channel lining structure, solves the problems that the concrete layer of the traditional channel lining has poor anti-freezing capacity and cracks and falls off due to freeze-thaw cycles, and eliminates potential safety hazards.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a prevent frostbite and melt channel lining cutting structure, includes the medium coarse sand layer of bottom, lays the compound geomembrane that is used for the prevention of seepage on the medium coarse sand layer, lays the sand gravel bed course that is used for preventing frostbite and bloates on compound geomembrane, lays the heated board that is used for keeping warm on the sand gravel bed course, brushes on the heated board and is used for increasing the adhesive force with the concrete layer, pours the frost resistant concrete layer on the adhesive layer.

And a plurality of expansion joints are arranged on the anti-freezing concrete layer.

The lower part in the expansion joint is filled with a closed-cell foam plate, and the upper part is filled with a two-component polysulfide sealant.

The insulation board comprises a polystyrene foam board.

The adhesive layer comprises 108 glue.

The particle size of the broken stones in the gravel stone cushion layer is 5-30 cm.

And a drain pipe is arranged in the medium coarse sand layer, penetrates through the anti-freezing concrete layer, the adhesive layer, the heat insulation board, the gravel stone cushion layer and the composite geomembrane from outside to inside in sequence, and is arranged in the medium coarse sand layer in an upward inclined manner from outside to inside.

The inclination angle of the drain pipe is 5 degrees.

The drain pipe in the medium coarse sand layer is provided with a plurality of quincuncial holes, and the hole sections and the pipe heads are wrapped and tied firmly by geotextile.

The medium and coarse sand layers are arranged in a right-angled triangle shape.

By adopting the scheme, the utility model has the following advantages:

by adopting the anti-freezing concrete layer, the anti-freezing capacity is improved, and cracks are not easy to generate after freeze thawing damage; by adding the adhesive layer, the bonding force of the heat-insulating plate and the anti-freezing concrete layer is improved, the condition that concrete falls off is greatly reduced, and potential safety hazards are eliminated; polystyrene cystosepiment can play the heat preservation effect, and the gravel stone bed course can play the effect of anti-freeze bloated, greatly increased the intensity of channel lining behind the whole cooperation.

Description of the drawings:

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic side view of the present invention.

Fig. 3 is a schematic sectional view along the line a-a in fig. 2.

In the figure, 1, a medium-coarse sand layer, 2, a composite geomembrane, 3, a gravel cushion layer, 4, a heat-insulating plate, 5, an adhesive layer, 6, an anti-freezing concrete layer, 7, an expansion joint, 8, a closed-cell foam board, 9, a two-component polysulfide sealant, 10 and a drain pipe.

The specific implementation mode is as follows:

in order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.

As shown in fig. 1 to 3, an anti-freezing channel lining structure comprises a middle coarse sand layer 1 at the bottom, a composite geomembrane 2 for seepage control is laid on the middle coarse sand layer 1, a sand gravel cushion layer 3 for preventing frost heaving is laid on the composite geomembrane 2, an insulation board 4 for heat insulation is laid on the sand gravel cushion layer 3, an adhesive layer 5 for increasing the adhesive force with concrete is coated on the insulation board 4, and an anti-freezing concrete layer 6 is poured on the adhesive layer 5.

Frost resistant concrete is generally expressed in frost resistance grades. The anti-freezing grade is determined by adopting the maximum freezing-thawing cycle times which can be borne by test blocks with age of 28d after the test blocks are saturated with water and the compression strength is reduced by no more than 25 percent and the mass loss is no more than 5 percent. GBJ50164-92 classifies the concrete as nine grades F50, F100, F150, F200, F250, F300, F350, F400 and > F400, which indicate that the concrete can withstand repeated freeze-thaw cycles 50, 100, 150, 200, 250, 300, 350, 400 and >400 times, respectively. The concrete with the frost resistance grade of more than or equal to F50 is called as frost-resistant concrete, so that the frost-resistant capability is improved, and cracks are not easy to generate after freeze-thaw damage.

Be equipped with a plurality of expansion joints 7 on the frost resisting concrete layer 6, expansion joint 7 can improve the deformability on frost resisting concrete layer 6 to adapt to the produced deformation of the inhomogeneous settlement of ground and temperature variation.

The lower part in the expansion joint 7 is filled with a closed-cell foam plate 8, and the upper part is filled with a two-component polysulfide sealant 9. The closed-cell foam plate 8 has an independent closed-cell bubble structure, the appearance honeycomb-shaped holes are uniformly distributed and are firmly and tightly integrated with the cement adhesive, the expansion and contraction change is naturally adapted to, and the expansion and water stop effect is enhanced. The two-component polysulfide sealant is prepared by taking liquid polysulfide rubber as a main agent, adding a reinforcing agent, a toughening agent, a tackifier, a thixotropic agent and other additives, and processing into a base paste; the metal oxide and the like are prepared into vulcanized paste, and the two components can be cured into the elastic sealing material after being mixed. The two-component polysulfide sealant 9 is a normal-temperature vulcanized two-component building B-class first-grade polysulfide sealant which has self-adhesive property with concrete and takes liquid polysulfide rubber as a base material, and has caulking water-stopping capability.

The insulation board 4 comprises a polystyrene foam board. The polystyrene foam board is a white object which is formed by heating expandable polystyrene beads containing volatile liquid foaming agent in a mould after heating and pre-foaming, has the structural characteristics of fine closed pores, and is mainly used for building wall, roof heat preservation, composite board heat preservation, and heat preservation and insulation of cold storage, air conditioner, vehicle and ship.

The adhesive layer 5 comprises 108 glue. The 108 glue has the advantages of stable viscosity, strong adhesion, mildew resistance, strong alkali resistance, good compatibility with other water-soluble glue, clearness, transparency, freeze solubility resistance, good film forming property and wide application. The glue is prepared by taking corn starch as a basic raw material and adding sodium hydroxide, monochloroacetic acid, urea, sodium phosphate, acrylonitrile, sodium hypochlorite or hydrogen peroxide, sodium bisulfite and tap water. The bonding force of the heat-insulating plate and the anti-freezing concrete layer is improved, the condition that the concrete falls off is greatly reduced, and potential safety hazards are eliminated.

The gravel particle size in the gravel cushion 3 is 5-30cm, and the function of preventing frost heaving can be achieved.

Well coarse sand layer 1 is equipped with drain pipe 10 in, drain pipe 10 is from outside-in to pass in proper order in frost resistant concrete layer 6, adhesive layer 5, heated board 4, sand gravel bed course 3, compound geomembrane 2 extend to in the coarse sand layer 1, and drain pipe 10 is from outside-in tilt up to set up, drain pipe 10 inclination is 5 degrees, and the water of being convenient for is discharged to the river course from in coarse sand layer 1 through drain pipe 10, prevents that the temperature from crossing excessively freezing in inside.

Be located and be equipped with the trompil that a plurality of plum blossom forms were arranged on the drain pipe 10 in coarse sand layer 1, trompil section and tube head are tied firmly through geotechnological cloth parcel, and geotechnological cloth can prevent that the grit from getting into drain pipe 10 and causing the jam.

The medium and coarse sand layer 1 is arranged in a right-angled triangle. The medium-coarse sand layer 1 is adopted to collect water, the water enters the drain pipe 10 through a plurality of openings on the drain pipe 10 and then is discharged into a river channel, the drain pipe 10 is a phi 60mm PE pipe, an outlet is positioned at a position 0.15m above the bottom of the channel, and the water is buried from outside to inside by adopting a gradient of 5%.

The above-described embodiments should not be construed as limiting the scope of the utility model, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.

The present invention is not described in detail, but is known to those skilled in the art.

Claims (10)

1. The utility model provides a prevent frostbite and melt canal lining structure which characterized in that: the anti-freezing concrete floor comprises a middle coarse sand layer at the bottom, a composite geomembrane for preventing seepage is laid on the middle coarse sand layer, a sand gravel cushion layer for preventing frost heaving is laid on the composite geomembrane, an insulation board for preserving heat is laid on the sand gravel cushion layer, an adhesive layer for increasing the adhesive force with concrete is coated on the insulation board, and an anti-freezing concrete layer is poured on the adhesive layer.

2. The anti-freeze channel lining structure of claim 1, wherein: and a plurality of expansion joints are arranged on the anti-freezing concrete layer.

3. The lining structure of an anti-freeze thawing canal of claim 2, wherein: the lower part in the expansion joint is filled with a closed-cell foam plate, and the upper part is filled with a two-component polysulfide sealant.

4. The anti-freeze channel lining structure of claim 1, wherein: the insulation board comprises a polystyrene foam board.

5. The anti-freeze channel lining structure of claim 1, wherein: the adhesive layer comprises 108 glue.

6. The anti-freeze channel lining structure of claim 1, wherein: the particle size of the broken stones in the gravel stone cushion layer is 5-30 cm.

7. The anti-freeze channel lining structure of claim 1, wherein: and a drain pipe is arranged in the medium coarse sand layer, penetrates through the anti-freezing concrete layer, the adhesive layer, the heat insulation board, the gravel stone cushion layer and the composite geomembrane from outside to inside in sequence, and is arranged in the medium coarse sand layer in an upward inclined manner from outside to inside.

8. The lining structure of an anti-freeze thawing canal of claim 7, wherein: the inclination angle of the drain pipe is 5 degrees.

9. The lining structure of an anti-freeze thawing canal of claim 7, wherein: the drain pipe in the medium coarse sand layer is provided with a plurality of quincuncial holes, and the hole sections and the pipe heads are wrapped and tied firmly by geotextile.

10. The lining structure of an anti-freeze thawing canal of claim 7, wherein: the medium and coarse sand layers are arranged in a right-angled triangle shape.

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