Liner and inflation bladder offset securement system and method

A reinforced manhole, comprising:

• a cementitious structure having a neck portion with an open top end, an offset portion extending at an angle and offset from the neck portion, and a chamber portion extending downwardly from the offset portion, a bottom, and at least one inlet pipe and one outlet pipe proximate the bottom;
• a liner including a neck portion with an open top end, an offset portion extending at an angle and offset from the neck portion, and a chamber portion extending downwardly from the offset portion, the liner juxtaposed to the cementitious structure and bonded thereto with resin;
• an inflatable bladder disposed within the liner, the inflatable bladder having a neck portion, an offset portion extending from and offset from the neck portion, and a chamber portion extending downwardly from the offset portion, the inflatable bladder including a plurality of bladder anchors attached to an outer surface of the inflatable bladder;
• a plurality of offset structure anchors secured in the cementitious structure between the offset portion and the chamber portion;
• a plurality of loop units attached to the liner;
• and,
• a plurality of pull straps, each of the pull straps having a proximal end and a distal end, the proximal end of each of the pull straps connected to one of the bladder anchors through one of the loop units of the liner and one of the offset structure anchors.

A method for rehabilitating and reinforcing an underground structure, the underground structure including a neck portion, an offset portion extending at an angle and offset from the neck portion, and a chamber portion extending downwardly from the offset portion, the method comprising the steps of:

• providing a liner having a neck portion, an offset portion extending at an angle and offset from the neck portion, a chamber portion extending downwardly from the offset portion, and a plurality of loop units;
• providing an inflatable bladder having a neck portion, an offset portion extending at an angle and offset from the neck portion, and a chamber portion extending downwardly from the offset portion, the inflatable bladder provided with a plurality of bladder anchors attached to an outer surface of the inflatable bladder;
• positioning the inflatable bladder inside the liner;
• fixing a plurality of offset structure anchors to the underground structure between the offset portion and the chamber portion thereof;
• providing a plurality of pull straps, each of the pull straps having a proximal end and a distal end;
• connecting the proximal end of each of the pull straps to one of the bladder anchors through one of the loop units of the liner and one of the offset structure anchors so that the distal ends of the pull straps extend away from the neck portion of the underground structure;
• and
• pulling the distal ends of the pull straps away from the underground structure so that the liner contacts internal surfaces of the underground structure.