Floor Cavity - Water Water Everywhere? Hi all, Serious interview for you budding surveyors out there! Given adjectives the lovely...

Hi all,
Serious interview for you budding surveyors out there!
Given adjectives the lovely rain we hold, I checked last year lower than my floor (we have a 1930 semi beside floor cavities) and was shocked to find hose (about 1 inch deep) - this seems to be solitary in the flipside room not the front lounge, it also only occur after lots of rain (i.e. UK weather). Once it have drained we found a 1 inch square hole in the concrete groundwork (it looked deliberate surrounded by the making) so we place a plastic pipe in the hole rising to in the region of 4 inches and sealed the remaining up next to filler (outside water tight stuff). The theory was to check within the pipe and see if the water table be high and thus the wet intrusion.
All seemed upright, rain and no wet, but last hours of darkness checked again and water is rear legs?!??!??! :-(
I have 2 question if someone can please help
1) Is it safe/normal for this to come about
2) How do you find the entry point and should we seal it

Thanks
Answers:    you will probably hold to have french drains installed. check next to a contractor
We had sea in our concrete crawlspace. The one and only solution was to install a French Drain. Basically, the contractor go around the entire perimeter of the concrete and digs a 3-4 foot hole. The hole is chock-full with some crushed stone and later a piece of PVC Pipe is run all the opening around. The PVC has holes surrounded by it and it is wrapped in a mesh textile. In our case two substantial crocks were installed within each final corner where a sump pump is installed inside. The crocks and the PVC Pipe is covered by secondary crushed stone. As the water table rises, the dampen looks for the easiest way to escape which are the the trenches. The hose flows into the PVC Pipe. The water runs through the pipe and because it is slightly pitched, runs into the crocks where on earth the sump pumps are located and gets pumped out of the hole. Before we installed this system, our crawlspace be like a swamp. Since installing it, it is and have been bone dry for four years and counting. It is pricey but you really requirement to call around and take quotes. Our system cost about $4,600 US but we have quotes as high as $25,000 (US) and they adjectives do the same item. It is well worth it and will lastingly fix the problem.