Conical risers interconnected by radially and circumferentially deflecting latches

A first riser for use in a riser assembly to provide access to a below-grade chamber, wherein the first riser comprises:

• an angled wall connecting a first end and a second end spaced apart along a central lengthwise axis;
• wherein the first end is circular and comprises:
• a first diameter;
• a first plurality of latches spaced around the first end and extending to a first terminal end, each latch comprising a radially extending lip and a canted terminal end surface, wherein the radially extending lip and the canted terminal end surface extend away from the central lengthwise axis;
• and
• a first plurality of receivers spaced between the first plurality of latches wherein each of the first plurality of receivers comprises a first bar extending away from the central lengthwise axis in a circumferential direction around the first end to define a first receiver opening;
• wherein the second end is circular and comprises:
• a second diameter;
• a second plurality of latches spaced around the second end and extending to a second terminal end that comprises a radially extending lip and a canted terminal end surface, wherein the radially extending lip and the canted terminal end extend towards the central lengthwise axis;
• and
• a second plurality of receivers spaced between the second plurality of latches wherein each of the second plurality of receivers comprises a second bar extending towards the central lengthwise axis in a circumferential direction around the second end to define a second receiver opening.