Ukusetyenziswa kwenethiwekhi yokukhupha amanzi edityanisiweyo enamacala amathathu kwindawo edibana kuyo indlela egcwalisiweyo nenqunyulweyo

Ekwakhiweni kwendlela enkulu, i-cut-fill roadbed yikhonkco elibuthathaka kwisakhiwo se-cut-fill roadbed, edla ngokubangela ukuhlala ngokungalingani, ukuqhekeka kwendlela kunye nezinye izifo ezibangelwa kukungena kwamanzi angaphantsi komhlaba, umahluko kwizixhobo zokuzalisa nezokwemba kunye netekhnoloji yokwakha engafanelekanga. Inethiwekhi yokukhupha amanzi edibeneyo enamacala amathathu sisixhobo esisetyenziswa rhoqo ukusombulula ezi ngxaki. Ngoko ke, zithini izicelo zayo kwi-cut-fill roadbed?

1. Izizathu zezifo kunye neemfuno zokukhupha amanzi kwindawo yokuhlangana kwendlela enqunyiweyo

Izifo zendlela ejikelezileyo ekufuphi ne-cut-fill zivela kakhulu kwezi zinto zilandelayo eziphikisanayo:

1. Umahluko phakathi kokungena kwamanzi angaphantsi komhlaba kunye nezinto ezisetyenziswayo

Indawo yokudibana phakathi kwendawo yokuzalisa kunye nendawo yokumba idla ngokwenza i-hydraulic gradient ngenxa yomahluko kumanqanaba amanzi angaphantsi komhlaba, nto leyo ebangela ukuba i-fill ithambise okanye ikhuhle.

2. Iziphene kwinkqubo yokwakha

Kwiinkqubo zemveli, iingxaki ezinje ngokumba ngokungacwangciswanga kunye nokuxinana okunganelanga kwindawo yokusika zixhaphakile.

2. Iingenelo zobugcisa zenethi yokukhupha amanzi edityanisiweyo enamacala amathathu

1. Ukusebenza kakuhle kokukhupha amanzi kunye nokusebenza kokuchasana nokuhluza

Inethi yokukhupha amanzi edityanisiweyo enamacala amathathu yenziwe nge-geotextile enamacala amabini kunye ne-mesh core ephakathi enamacala amathathu. Ubukhulu be-mesh core yi-5-7.6mm, i-porosity yi->90%, kwaye umthamo wokukhupha amanzi yi-1.2×10⁻³m²/s, elingana nomaleko wegrabile onobukhulu obuyi-1m. Umjelo wokukhupha amanzi owenziwe ziimbambo zawo ezithe nkqo kunye neembambo ezithe tyaba unokugcina ukuhanjiswa kwamanzi okuzinzileyo phantsi komthwalo ophezulu (3000kPa).

2. Amandla okuxinana kunye nokuqiniswa kwesiseko

Amandla okutsalwa okude nokunqamlezileyo kwenethi yokukhupha amanzi edityanisiweyo enamacala amathathu anokufikelela kwi-50-120kN/m, nto leyo enokuthatha indawo yomsebenzi wokuqinisa wezinye ii-geogrids. Xa ibekwe kwindawo yokudibana kokuzaliswa nokugrunjwa, isakhiwo sayo esingundoqo se-mesh sinokusasaza uxinzelelo loxinzelelo kwaye sinciphise ukuhlala okuhlukeneyo.

3. Ukuqina kunye nokulula kokwakha

Yenziwe nge-polyethylene enoxinano oluphezulu (i-HDPE) kunye ne-polyester fiber composite, ekwaziyo ukumelana nemisebe ye-ultraviolet, i-asidi kunye nokugqwala kwe-alkali, kwaye inobomi benkonzo obungaphezulu kweminyaka engama-50. Iimpawu zayo ezilula (ubunzima kwindawo nganye engaphantsi kwe-1.5kg/m²) zenza kube lula ukuyibeka ngesandla okanye ngoomatshini, kwaye ukusebenza kakuhle kokwakhiwa kuphezulu ngama-40% kunokweeleya zemveli zegrabile.

III. Iindawo zokwakha kunye nolawulo lomgangatho

1. Unyango lomphezulu osisiseko

Ububanzi bokugrumba kwenyathelo kwindawo ekudibana kuyo ukuzaliswa kunye nokugrumba yi-≥1m, ubunzulu bufikelela kumaleko womhlaba oqinileyo, kwaye impazamo yokuthamba komphezulu yi-≤15mm. Susa izinto ezibukhali ukuze ungagqobhozi inethi yokukhupha amanzi.

2. Inkqubo yokubeka

(1) Inethi yokukhupha amanzi ibekwe ecaleni kwendlela, kwaye icala eliphambili lamandla lithe nkqo kwinqanaba;

(2) Ukwalamana kuqiniswa nge-hot melt welding okanye izikhonkwane ezimile njengo-U, kunye nesithuba se-≤1m;

(3) Ubungakanani obukhulu beesuntswana ze-backfill yi-≤6cm, kwaye kusetyenziswa oomatshini abakhaphukhaphu ukuxinanisa ukuthintela ukonakala kwe-mesh core.

3. Ukuhlolwa komgangatho

Emva kokubeka, kufuneka kwenziwe uvavanyo lokuqhuba amanzi (ixabiso eliqhelekileyo ≥1×10⁻³m²/s) kunye novavanyo lokuqina kokudibanisa (amandla okutsalwa ≥80% yexabiso loyilo).

Njengoko kunokubonwa koku kungasentla, inethiwekhi yokukhupha amanzi edibeneyo enamacala amathathu inokuphucula uzinzo kunye nokuqina kwe-fill-excavation junction junction ngeenzuzo zayo zokukhupha amanzi ngendlela efanelekileyo, ukuqinisa ukuxinana kunye nokuqina.