SE447285B

SE447285B - Percolating surface water that comprises magazine of drainable material surrounded by a water-permeable screen

Info

Publication number: SE447285B
Application number: SE8100531A
Authority: SE
Inventors: Rolf Ansgariusson; Jan Sundqvist
Original assignee: Rolf Ansgariusson; Jan Sundqvist
Priority date: 1981-01-28
Filing date: 1981-01-28
Publication date: 1986-11-03
Also published as: FI75018B; FI75018C; SE8100531L; NO820245L; FI820260L; SE447285C

Abstract

A percolating surface water gully comprises a gully body (1) recessed in a magazine (8) of drainable material such as asphalt. The diameter of the gully body is less than that of the magazine diameter and it is equipped with an overflow (3a). The entire magazine (8) is surrounded with a water-permeable screen (10, 11, 12) which prevents intrusion of sand and other materials into the magazine from the gully body (1) or surrounding ground. The lateral area and the bottom of the gully are perforated (2). The overflow is made of a pipe (3a) extending vertically into the gully, the upper mouth of which can be closed with a lid (5) which can also be raised open when the water level in the gully body (1) reaches a pre-determined level.<IMAGE>

Description

f 447 285 KI! 10 15 20 25 30 35 2 ken undanröjer nackdelarna hos den tidigare kända brunnen. f 447 285 KI! 10 15 20 25 30 35 2 ken eliminates the disadvantages of the prior art well.

Ovanstående ändamål uppnås enligt uppfinningen med en perkolerande dagvattenbrunn, vars särdrag fram- går av efterföljande patentkravs kännetecknande delar.The above object is achieved according to the invention with a percolating stormwater well, the features of which appear from the characterizing parts of the appended claims.

Med föreliggande uppfinning utökas möjligheterna till lokalt omhändertagande av dagvattnet, eftersom dag- vattenbrunnens närmaste omgivning utnyttjas som magasin och därmed som infiltreringsområde. Antalet brunnar i en gata är stort, varför den totala infiltreringen blir av- sevärd.The present invention expands the possibilities for local disposal of stormwater, since the immediate surroundings of the stormwater well are used as a reservoir and thus as an infiltration area. The number of wells in a street is large, which is why the total infiltration becomes significant.

Med föreliggande uppfinning kan man dels minska led- ningsdimensionerna, vilket har stor ekonomiskt betydelse, dels förenkla installationsarbetet, genom att brunnen är prefabricerad och mindre än traditionella dagvattenbrun- nar, dels möjliggöra en mindre schaktning än tidigare samt avledning av dagvattnet även till grundförlagda lednings- system, och dels minska frysningsrisken i brunnen.With the present invention, it is possible to reduce the pipe dimensions, which is of great economic importance, partly to simplify the installation work, by the well being prefabricated and smaller than traditional stormwater wells, partly enabling less excavation than before and diversion of stormwater to basic pipelines. system, and partly reduce the risk of freezing in the well.

Uppfinningen kommer nu att beskrivas närmare nedan med hjälp av utföringsexempel under hänvisning till med- följande ritning.The invention will now be described in more detail below by means of exemplary embodiments with reference to the accompanying drawing.

Fig l visar en vertikal sektion genom en dagvatten- brunn enligt uppfinningen.Fig. 1 shows a vertical section through a stormwater well according to the invention.

Fig 2 visar en sektion längs linjen II-II i fig l.Fig. 2 shows a section along the line II-II in Fig. 1.

Fig 3 visar en modifierad utföringsform av ett brädd- avlopp i brunnen. _ Fig l visar en prefabricerad brunnskropp 1, exempelvis av betong, som är placerad i ett magasin 8 bestående av dränerande material, exempelvis självpackande krossproduk- ter, företrädesvis makadam. Både brunnens mantelyta och botten är perforerade, varigenom vatten i brunnskroppen kan rinna ut i magasinet via hål 2, som är fördelade över hela brunnskroppens i marken nedsänkta yta. Brunnskroppens diameter är betydligt mindre än magasinets 8 diameter, varigenom brunnens kapacitet blir stor och varvid en per- 10 15 20 25 30 35 447 285 3 kolation av dagvatten kan ske från brunnen ut i den omgi- vande marken via en mellanmagasinering av vattnet i maga- sinet 8.Fig. 3 shows a modified embodiment of a overflow drain in the well. Fig. 1 shows a prefabricated well body 1, for example of concrete, which is placed in a magazine 8 consisting of draining material, for example self-packing crushed products, preferably macadam. Both the mantle surface and the bottom of the well are perforated, whereby water in the well body can flow out into the reservoir via hole 2, which is distributed over the entire surface of the well body immersed in the ground. The diameter of the well body is considerably smaller than the diameter of the reservoir 8, whereby the capacity of the well becomes large and whereby a percolation of stormwater can take place from the well into the surrounding soil via an intermediate storage of the water in the stomach. - sinet 8.

För att förhindra att fina partiklar, exempelvis sand, som förs ned i brunnen med dagvattnet, tränger ut i maga- sinet är detta omslutet av en vattengenomsläpplig fiber- duk 10, ll, exempelvis av typen TERRAM , fibertex, etc.To prevent fine particles, for example sand, which is carried down into the well with the stormwater, from penetrating into the reservoir, this is enclosed by a water-permeable non-woven fabric 10, ll, for example of the type TERRAM, fibertex, etc.

Fiberduken förhindrar dessutom en uppblandning av ma- gasinsfyllnaden och undergrund. Vid det i fig l visade ut- föringsexemplet gräves först ett i förhållande till brunns- kroppen 1 tämligen stort hål i marken. Därefter nedlägges en fiberduk 10 i hålet, så att dettas väggar helt täckes av duken, vilken göres så stor, att en flik 12 bildas vid markytan. Den prefabricerade brunnskroppen l förses med en strumpa ll av vattengenomsläpplig fiberduk, som täcker alla hålen 2 i brunnskroppen. Magasinsmaterial hälles i hålet i marken för täckande av hålets botten, varefter den med strumpan försedda brunnskroppen nedsättes på magasins- materialet. Hålet fylles därefter med magasinmaterial upp- till brunnskroppens övre kant. Fliken 12 vikes in mot brunnskroppen l och anslutes till strumpan ll för bil- dande av det slutna magasinet 8. Ett brunnslock 4 eller betäckning placeras på brunnskroppen och ett ytbelägg- ningsmaterial 9 placeras på magasinet.The non-woven fabric also prevents a mixture of the stomach filling and the subsoil. In the exemplary embodiment shown in Fig. 1, a rather large hole is first dug in the ground in relation to the well body 1. Thereafter, a nonwoven fabric 10 is laid in the hole so that its walls are completely covered by the fabric, which is made so large that a flap 12 is formed at the ground surface. The prefabricated well body 1 is provided with a sock 11 of water-permeable non-woven fabric, which covers all the holes 2 in the well body. Magazine material is poured into the hole in the ground to cover the bottom of the hole, after which the well body provided with the sock is lowered onto the magazine material. The hole is then filled with magazine material up to the upper edge of the well body. The flap 12 is folded in towards the well body 1 and connected to the sock 11 to form the closed magazine 8. A manhole cover 4 or cover is placed on the well body and a coating material 9 is placed on the magazine.

Brunnen enligt uppfinningen är försedd med ett brädd- avlopp 3a (fig 1 och 2) eller 3b (fig 3). Fig l och 2 vi- sar ett bräddavlopp bestående av ett i brunnskroppen l löstagbart placerat, vertikalt rör 3a, vars nedre del är krökt och förd ut genom brunnskroppen för anslutning till en dagvattenledning 7. Bräddavloppets avrinningsnivå kan sänkas om så önskas genom att röret 3a kan borttagas från brunnskroppen l och kapas till önskad nivå och återinsät- tas i brunnen. Rörets 3a mynning är tillsluten medelst ett lock 5, som är försett med flytkroppar och ledbart för- bundet med röret, brunnskroppsväggen eller betäckningen 4, varvid bräddavloppet öppnas för tömning av överskottsvat- ten till dagvattenledningen 7, när vattnet i brunnskroppen lyfter locket 5. Tack vare det normalt stängda locket mins- 447 285 4 kas risken för frysning i rörkröken vid rörets 3a nedre del genøm att luftströmning genom bräddavloppet förhind- ras.The well according to the invention is provided with a overflow drain 3a (Figs. 1 and 2) or 3b (Fig. 3). Figs. 1 and 2 show a overflow drain consisting of a vertically placed vertical pipe 3a releasably in the well body 1, the lower part of which is curved and led out through the well body for connection to a stormwater pipe 7. The overflow drain level can be lowered if desired by the pipe 3a can be removed from the well body 1 and cut to the desired level and reinserted into the well. The mouth of the pipe 3a is closed by means of a lid 5, which is provided with floating bodies and hingedly connected to the pipe, the well body wall or the cover 4, the overflow drain being opened for emptying excess water to the stormwater pipe 7, when the water in the well body lifts the lid 5. even if the normally closed lid is reduced, the risk of freezing in the pipe bend at the lower part of the pipe 3a is reduced by preventing air flow through the overflow drain.

Fig 3 visar ett bräddavlopp 3b, som innefattar en plan, vertikal vägg, vilken delar brunnskroppen i en hu- vuddel och en bräddavloppsdël.Fig. 3 shows an overflow drain 3b, which comprises a flat, vertical wall, which divides the well body into a main part and an overflow drain part.

V;V;

Claims

10 15 20 447 285 PATENT CLAIMS

1. A percolating stormwater well, which comprises a well body (1) lowered into a reservoir (1) consisting of a draining material, eg macadam, whose diameter is considerably smaller than the diameter of the reservoir and which is provided with an overflow drain ( Ba), characterized in that the reservoir (8) is enclosed by a first water-permeable cloth (10, 12), which prevents the penetration of sand and other objects into the reservoir from the surrounding ground; that the well body (1) immersed in the reservoir is enclosed by a second water-permeable cloth (II), which prevents the penetration of sand and other objects into the reservoir from the well body; that the main entire mantle surface and bottom of the well body are perforated (2); and that the overflow drain consists of a pipe (3a, 3b) extending vertically in the well.

2. A well according to claim 1, characterized in that the overflow drain consists of a separate in well- (1)

Well according to claim 1, in that the overflow drain (3b) is formed by a part of the casing surface of the well body (1) and a vertical wall (3a) arranged in the well body. k ä n n e t e c k n a d the body.

4. A well according to any one of claims 1-3, characterized in that the upper mouth of the overflow drain (3a; 3b) is closed by means of a lid (5), which is raised to release the mouth, when the water level in the well the body (1) reaches a predetermined level. - -_...._.- »w --- ^ ...._ _ _