Cracks in pool
I have an inground shotcrete pool that was completed in November, 2009. We did not notice any problems until a little over a year later (in December 2010). The last week in December we noticed that we were losing water. Over the next week, we started measuring and were losing aprox 1" per day. Pool builder said let it leak and that will tell us where the leak is located. However, as the water line went down, cracks became noticeable. During the month of January, cracks seem to be developing and/or worsening at an alarming rate. We lost about half of the water. After losing that much water, the pool builder pumped more out bringing the deep end to about 3' of water. (We were greatly concerned about allowing it to leak this much because we didn't want all this water under the pool.)
The pool is about 47' x 20'. It has an underwater beach area on the left, then drops down to about 3' and continues to the deep end which is about 9'. There is a swim-up bar area at about 3 1/2' depth that is attached to our outdoor kitchen with steel. There is a crack that goes all the way through the beach area and down the wall into the floor. 2 cracks at the right fountain (attached to the bar area) down the wall and into the floor. Some on the left wall of bar (through the steps) and down the wall and into the floor. Several on the opposite pool wall and they range from the 3' depth to about 5' depth of the pool. All of the cracks are now meeting up in the floor.
Our property slopes downhill on the deep end. The deep end was dug down into natural soil about 4'. They used a sandy soil to build up the yard and slope aroud the diving board.
Some of the cracks in the below photos have already been chiseled. They were going to fill with epoxy. We had them stop until we could gather more information.
Pool built to the following specs:
Concrete structural shell 1/2" diameter steel located on 9 inch centers on both horizontal and vertical walls and also on the floor. The shell will be a minimum of 12 inches thick on the floor and a minimum of 8 inches thick on the wall, with a 12 inch beam located at the top. There will be 2 exits located in the pool, one being the steps with an underwater beach area and second being a bench located at the opposite end of the pool. The pool will be equipped with two skimmers intake, 6 returns, with directional eyeballs and two drains. There will be two additional drains and one wall drain located in pool for water feature. An additional fitting will be installed through the wall of the pool for a Polaris cleaner. There will also be two -500 watt lights installed in the pool wall.
All plumbing and electrical conduit will be schedule 40 pvc and installed underground
Oklahoma style rock coping located along the outer perimeter of the pool with a foam polivoid added between the concrete surface and the rock coping covered with a rubber based (Deck-a-seal) sealant. The pool will have 6" frost-proof ceramic tile, located at the waterline perimeter and in the skimmer throat.
1-2 hp Sta-Rite Circulating pump
1-1hp pump for the sheater
Triton TA Sand filter w/multi port valve
Polaris 280 floor cleaner with booster pump
Intermatic clocks with freeze protection
2-500 watt Pool lights
2-12" Nexus water sheater
Intermatic remote for lights
5-Anti-vortex safety drains
Rainbow 320 Chlorinator
UltraPure Ozone generator
SR Smith 8� Frontier II diving board w/stand
Below are pictures that were taken during construction :