BC, I'm not a DPA user nor do I know how you are powering these microphones; if condenser microphones aren't correctly powered, they won't be able to handle their normal, rated maximum sound pressure levels.
But assuming that the 134 dB SPL limit you quoted is the actual limit, I can virtually guarantee you that you're not exceeding that if the microphones are in the same general space as human listeners. 134 dB is beyond any level that human listeners can stand to be near unless they're profoundly deaf (and if that isn't the case already, it will be soon at 134 dB SPL). You might get levels like that if you placed your microphones directly IN the bell of a trumpet or trombone--but maybe not even then.
Most often, if microphones with such high SPL capabilities are overloaded, it's either because of improper powering or because of wind or other strong moving air currents such as breath noise from a singer who's yelling. Overload doesn't happen nearly as often from sound energy as such. So one of the first things to try is a simple windscreen. If the distortion decreases noticeably or goes away, there's your problem.
The next thing to try like that is a resistive pad at the input of whatever piece of equipment the microphones are connected to. Preamp, mixer and recorder inputs have their own overload limits, and very loud sounds may cause high-output microphones to put out levels which exceed those limits. In a lot of equipment this limitation has little or nothing to do with whatever the meters or LEDs are telling you about the signal levels, because usually those meters or indicators are responding to the levels at the output of the equipment, while overload may be occurring at the input. If so, the rest of the equipment can't do much except to faithfully amplify that distortion. So even if you're watching the record levels and keeping everything well below 0 dB, you can still have a super-hi-fi recording of a lot of distortion.
--best regards