Drawbacks
Pneumatic bore tools do have drawbacks which can cause difficulties completing the bore. First the distance of the bore the tool can create is limited by the length of the hose that supplies the tool with air. Also the tool is not steerable once it has exited the bore pit the operator no longer has control over it. The tool can be deflected by rocks and soil density to a path the operator had not intended. If this deflection is in the direction of the surface the tool can cause damage to the obstacle being bored under if it is downward the tool can dive to unrecoverable depth. If it is deflected side to side the tool could also run into other utilities. These hazards make it important for the operator to maintain close observation of the tool. The type of ground the tool is working in can also lead to problems if the soil is too loose the tool cannot compact the soil stalling it out or leaving no bore hole. If the soil is rocky the tool may be deflected or fail to pound forward due to its inability break the rock. These drawbacks can overcome by directional boring.
Read more about this topic: Underground Pneumatic Boring
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