CN102587399B - Salivary flow ice prevention and management structure in cold zone - Google Patents

Abstract

The invention relates to a salivary flow ice prevention and management structure in a cold zone. The structure is characterized in that heat-insulation plates are laid below an earth filling layer of a slope crest and on a slope surface and the upper middle portion of a drainage ditch, the corresponding heat-insulation plate is connected with the slope surface by anchor rods, a buffering layer is formed in the middle of the drainage ditch by geotextile and fine sand, a surface permeable layer is formed on the top of the drainage ditch by hexagonal hollow bricks and crushed stone, soil with grass seeds is placed in the hexagonal hollow bricks of the slope surface, and an ecological side slope is formed. The heat-insulation plates are laid below the earth filling layer of the slope crest and on the slope surface and the upper middle portion of the drainage ditch, shallow water in an upslope direction flows down along the inner side of the heat-insulation plate of the slope surface, is gathered in the drainage ditch and is drained by the drainage ditch. Surface water is drained via the surface permeable layer. Accordingly, the salivary flow ice prevention and management structure guarantees that an underground drainage line cannot be completely frozen in winters, and salivary flow ice is prevented.

Description

Cold district salivary flow ice control structure

Technical field

The present invention relates to a kind of cold district salivary flow ice control structure.The salivary flow ice control that is applicable to cold district excavation works section is used.

Background technology

There is most of area in China in cold district.Cold district excavation works very easily forms side slope type salivary flow ice, jeopardizes building and traffic safety.The reason of this formation of marine disasters is: excavation has blocked underground water migration path, makes originally to flow out in side slope at underground mobile current, has just formed side slope type salivary flow ice under cold climate condition.

Traditional salivary flow ice Prevention Technique has: hidden pipe, french drain, catchwater, gear ice wall, gear ice dam, backbreak etc.The measure of backbreaking is very large to environmental perturbation.Having researched and developed in recent years multi-outlet drainage system, insulation and collecting well and heat-insulating water outlet, all there is major defect to preventing and treating side slope type salivary flow ice in above-mentioned these measures.China northeast, Hill Region of Northwest, mountain region many frontier defense road side slopes type salivary flow ice are very general, bring hidden trouble to traffic safety, and the conveying of army's desired substance is also affected.Therefore, research is administered side slope type salivary flow ice for ensureing that highway communication is unimpeded, promoting national economic construction and national defence to ensure significant.

Summary of the invention

For reducing, prevent the harm of side slope type salivary flow ice, the object of the present invention is to provide a kind of salivary flow ice control structure.This structure be incubated to top, domatic, slope and gutter processings, underground water inflow gutter, and surface water passes through top, gutter water-permeable brick and macadam discharged to lower.Surface water and groundwater is drained by different paths, has effectively improved temperature in gutter, has prevented the generation of side slope type salivary flow ice.

The technical solution adopted in the present invention is:

A kind of cold district salivary flow ice control structure, is by warming plate, fill stratum, hexagon hollow brick, gutter, cushion coat and earth's surface pervious layer composition.Below the fill stratum of top, slope, domatic and middle and upper part, gutter lays warming plate, warming plate is connected with domatic employing anchor pole, middle part, gutter forms cushion coat by geotextiles and fine sand, top, gutter forms earth's surface pervious layer by hexagon hollow brick and rubble, places the soil containing grass seeds in domatic hexagon hollow brick.

The beneficial effect of advantage of the present invention and generation is:

1, the use of warming plate can reduce slope excavation earthwork quantity and reach the object of insulation, reaches the effect reducing environmental perturbation simultaneously.Make to go up a slope the diving of direction along domatic warming plate inner side and under, be pooled in gutter, drain by gutter.Earth's surface pervious layer is collected the infiltration between excretion surface water and domatic hexagon hollow brick and domatic warming plate.The present invention has avoided freezing destruction that traditional mortar flag stone side slope causes and the generation of salivary flow ice disaster.The effectively generation of control salivary flow ice disaster.

2, the combination setting of the cushion coat in gutter, earth's surface pervious layer and warming plate, plays the heat insulation effect in reinforced platoon ditch.Ensure top drainage simultaneously and reduced the depth of frost penetration in gutter.

3, plant grass in domatic upper hexagon hollow brick and can reach the effect of beautifying the environment, consolidate hexagon hollow brick and domatic combination, play the object of the domatic depth of frost penetration of minimizing simultaneously.

4, project organization of the present invention is simple, can carry out at the scene Rapid Implementation, and with low cost, is convenient to promote.

Brief description of the drawings

Fig. 1 view profile of the present invention

Fig. 2 is the elevation of hexagon hollow brick in Fig. 1

Detailed description of the invention

Below, by reference to the accompanying drawings the present invention is further described again:

As shown in Figure 1, a kind of cold district salivary flow ice control structure is by warming plate 2---polyurethane sheet, fill stratum 1, hexagon hollow brick 3, gutter 6, cushion coat 5 and earth's surface pervious layer 4 form.Below top, slope fill stratum 1,6 middle and upper parts, domatic and gutter lay polyurethane sheets, polyurethane sheet is connected with domatic employing anchor pole, bolt diameter 1.5cm.Polyurethane sheet thickness 6-15cm, coefficient of thermal conductivity 0.025W/m DEG C.6 tops, gutter, lay and form earth's surface pervious layer 4 by hexagon hollow brick 3 and rubble, thickness 30cm on 10cm polyurethane sheet.On the 6 middle part 110cm chunk stones of gutter, form cushion coat 5 by geotextiles and dry fine sand.The interior placement of domatic hexagon hollow brick 3, containing the soil of grass seeds, forms Ecological Slope.Hexagon hollow brick 3 length of side 30cm, thickness 30cm.

For understanding better the present invention, give to further illustrate by following test example, but be not limitation of the invention.Construction sequence of the present invention is as follows:

(a) excavation slope, forms the domatic of the gradient 1: 0.75, uses concrete leveling.

(b) within the scope of the 2m of top, slope, excavate the native 40cm of table, then lay the polyurethane sheet that 10cm is thick, then carry out backfill with the soil of excavating, form fill stratum 1.

(c) short transverse interval 1.5m on domatic, horizontal direction interval 2m squeezes into anchor pole, anchor pole degree of depth 50cm, exposes 12cm, bolt diameter 1.5cm, exposed parts tapping, then polyurethane sheet thick 10cm is fixed on domatic on.Fixing means is to punch on polyurethane sheet, Kong Weiyu anchor pole position is corresponding, and anchor pole and polyurethane sheet adopt nut to fix, and water-tight processing is carried out in the space between nut and polyurethane sheet and polyurethane sheet and insulation with marine glue, with the supporting pad diameter 20cm of nut, thick 0.5cm.

(d) drainage trenching 6, after shaping, insert the piece stone of 1.1m, then lay one deck geotextiles, then lay the dry fine sand that 10cm is thick and make cushion coat 5, lay afterwards the polyurethane sheet that 10cm is thick, then lay 10cm rubble, finally lay the hexagon hollow brick 3 that 20cm is thick, form earth's surface pervious layer 4.

(e) on domatic, lay length of side 30cm, the hexagon hollow brick 3 of thickness 30cm.

(f) in hexagon hollow brick 3, fill out the soil of putting containing being applicable to local growth grass seeds, finally form the Ecological Slope of a control salivary flow ice disaster.

Operating principle of the present invention is: the diving of upward slope direction along domatic polyurethane sheet inner side and under, be pooled in gutter 6, drain by gutter 6.Surface rain is drained by earth's surface pervious layer 4.Rational insulation processing has been carried out at slope top, domatic and top, gutter, has ensured that fully charge can not occur underdrainage circuit in the winter time.

The present invention relates to conduct heat and seepage theory, consider that the control differential equation of seepage flow and heat transfer is:

$C^{*}\frac{\∂T}{\∂t}=\frac{\∂}{\∂x}\left({\mathrm{\λ}}^{*}\frac{\∂T}{\∂x}\right)+\frac{\∂}{\∂y}\left({\mathrm{\λ}}^{*}\frac{\∂T}{\∂y}\right)-C_w{\mathrm{\ρ}}_w(V_x^{*}\frac{\∂T}{\∂x}+V_y^{*}\frac{\∂T}{\∂y})---\left(I\right)$

$S^{*}\frac{\∂H}{\∂t}=\frac{\∂}{\∂x}\left(K_x^{*}\frac{\∂H}{\∂x}\right)+\frac{\∂}{\∂y}\left(K_y^{*}\frac{\∂H}{\∂y}\right)+Q---\left(\mathrm{II}\right)$

In formula, T and H are respectively temperature and head, and t is the time, C _wand ρ _wbe respectively specific heat of water and unit weight, the source that Q is seepage field or remittance.C ^*, λ ^*be respectively thermal capacitance and coefficient of thermal conductivity.

Adopt above governing equation, can verify the effect of structure of the present invention by Numerical Experimental Method, thereby determine rational insulation thickness.

Utilize formula (I), (II), by numerical experiments method, salivary flow ice control structure is tested.Test conditions is: the environment minimum temperature that acts on body structure surface is-25 DEG C, and test temperature is since 0 DEG C, and experience minimum temperature, then rises to 0 DEG C.Test period is from late October at the beginning of 4 months next years.Side slope type is the rock side slope of weathering.Building is the wide roadbed of 7m.Warming plate thickness 10cm, coefficient of thermal conductivity 0.025W/m DEG C.Rock material freeze with the coefficient of thermal conductivity of melting state and thermal capacitance respectively: λ _f=1.824Wm ^-1k, λ _u=1.474Wm ^-1k, C _f=1.846e ⁶jm ^-3, C _u=2.099e ⁶jm ^-3.The transmission coefficient of basement rock is $K_x^u=K_y^u=7.0\×{10}^{-6}m.$ Initial value temperature is 10 DEG C.

Result is taking this parameter of maximum frozen depth as judging basis.Result of the test shows: the maximum frozen depth at side slope top is 1.54m, and toe position is 0.34cm, is 1.2m in gutter.Above data declaration is under more extreme condition, and structure of the present invention still can keep drain function, can effectively prevent and treat the generation of salivary flow ice disaster.

Claims (1)

1.Yi Zhonghan district salivary flow ice control structure, by warming plate (2), fill stratum (1), hexagon hollow brick (3), gutter (6), cushion coat (5) and earth's surface pervious layer (4) composition, it is characterized in that: in top, slope fill stratum (1) below, warming plate (2) is laid in domatic and middle and upper part, gutter (6), warming plate (2) is connected with domatic employing anchor pole, middle part, gutter (6) forms cushion coat (5) by geotextiles and dry fine sand, top, gutter (6) forms earth's surface pervious layer (4) by hexagon hollow brick (3) and rubble, in domatic hexagon hollow brick (3), place the soil containing grass seeds.