Manhole installation and repair assembly

Abstract

A manhole installation and repair assembly. The assembly has a first load carrying member and a second load carrying member. Each load carrying member has a midspan seat arranged substantially at a midspan location of the respective load carrying member's. The midspan seats form a crossmember joint, the joint enables the load carrying member's to be arranged in the same plane and also provides for structural continuity between the load carrying members. The load carrying member's each have ground engaging locations and manhole ring retainer elements to grab on to the manhole ring holding the ring and cover in suspension below the load carrying members. An inflatable form liner is used to span the gap between the manhole ring and the top of the manhole cone.

1 . A midspan cross member joint for a manhole installation assembly, said joint comprising:
 a. a first midspan seat arranged substantially at a first mid-span location of a first load-carrying member;   b. a second midspan seat arranged substantially at a second mid-span location of a second load-carrying member;   c. said first midspan seat arranged to receive said second midspan seat and form said cross member joint;   d. said cross member joint enabling said first load caring member and said second load carrying member to be arranged within a first horizontal plane;   e. said crossmember joint maintaining a structural capacity to hold a load maintained by said first and second load-carrying members.   
   
   
       2 . The joint according to  claim 1  wherein said joint further comprises: said first load-carrying member and said second-carrying member resisting a maximum midspan moment provided by said carried load and applied at the crossmember joint. 
   
   
       3 . The joint according to  claim 1  wherein said joint further comprises:
 a. said first load-carrying member comprising a first top cross sectional compression zone, said first top cross sectional compression zone interrupted by said first midspan seat;   b. said second load carrying member comprising a second bottom cross sectional tension zone, said second bottom cross sectional tension zone interrupted by said second midspan seat;   c. said second midspan seat of said second load-carrying member further comprising a second top compression zone to transfer a first compression force in said first load-carrying member across said first midspan seat;   d. said first midspan seat of said first load carrying member further comprising a first bottom tension zone to transfer a second tension force in said second load carrying member across said second midspan seat.   
   
   
       4 . The joint according to  claim 3  wherein said first bottom tension zone further comprises:
 a. a first cross-sectional area of said first load carrying member, said first cross-sectional area applied along a first seat length of said first mid-span seat;   b. a bottom tension member connecting said second bottom cross-sectional tension zone interrupted by said second midspan seat.   
   
   
       5 . The joint according to  claim 3  wherein said first midspan seat further comprises:
 a. a substantially rectilinear seat extending from a top edge of said first load-carrying member to about a central axis of said first load-carrying member;   b. said rectilinear seat further comprising a width substantially great enough to accept a cross-sectional width of said second load-carrying member.   
   
   
       6 . The joint according to  claim 3  wherein said second midspan seat further comprises:
 a. a substantially rectilinear seat extending from the bottom edge of said second load-carrying member to about a central axis of said second load-carrying member;   b. said second rectilinear seat further comprising a width substantially great enough to accept a cross-sectional width of said first load-carrying member.   
   
   
       7 . The joint according to  claim 1  wherein said first midspan seat further comprises: a first transversely aligned through port perpendicular to a longitudinal lengthwise axis of said first load-carrying member, said transversely aligned through port ranged to receive said second load-carrying member comprising a second load-carrying member cross-sectional area. 
   
   
       8 . The joint according to  claim 7  wherein said first transversely aligned through port further comprises: a circular cross-section to receive said second load-carrying member comprising a circular cross-section. 
   
   
       9 . The joint according to  claim 7  wherein said first transversely aligned through port further comprises: a rectilinear cross-section to receive said second load-carrying member comprising a rectilinear cross-section. 
   
   
       10 . A manhole installation and repair assembly, said assembly comprising:
 a. a first load-carrying member comprising a longitudinal length to span over an excavation region encompassing a manhole cone, said first load-carrying member further comprising a first midspan seat arranged substantially at a first midspan location of said first load-carrying member;   b. a second-load carrying member comprising a transverse length to span over said excavated region, said second load-carrying member further comprising a second midspan seat arranged substantially at a second midspan location of said second load-carrying member;   c. said first midspan seat arranged to receive said second midspan seat and form a crossmember joint enabling said first load-carrying member and said second load-carrying member to be arranged within a substantially horizontal plane;   d. said first load-carrying member further comprising two first ground engaging locations at either end of said first load-carrying member;   e. said second load-carrying member further comprising two second ground engaging locations at either end of said second load-carrying member;   f. said first load-carrying member further comprising two adjustable manhole retainer elements to operably engage at diametrically opposed locations a manhole ring;   g. said second-load carrying member further comprising two adjustable manhole retainer elements to operably engage at diametrically opposed locations a manhole ring;   h. an inflatable form liner comprising an outer wall to maintain a seal between an inside face of a proposed manhole cone extension wall above a top edge of said manhole cone and a bottom edge of said manhole ring.   
   
   
       11 . The assembly according to  claim 10  wherein said first load-carrying member further comprises one or more of the following materials: aluminum, steel, carbon fiber, wood, plastic. 
   
   
       12 . The assembly according to  claim 10  wherein said second load-carrying member further comprises one or more of the following materials: aluminum, steel, carbon fiber, wood, plastic. 
   
   
       13 . The assembly according to  claim 10  wherein said assembly further comprises:
 a. said first load-carrying member comprising a first rectilinear cross-section;   b. said second load-carrying member further comprises a second rectilinear cross-section.   
   
   
       14 . The assembly according to  claim 10  wherein said assembly further comprises:
 a. said first load-carrying member comprising a first circular tube steel cross-section;   b. said second load-ember further comprising a second circular tube steel cross-section.   
   
   
       15 . The assembly according to  claim 10  wherein said adjustable manhole retainer element further comprises: sliding sleeves configured to attach to an outside face of said manhole ring. 
   
   
       16 . The assembly according to  claim 10  wherein said assembly further comprises:
 a. said manhole ring holding a manhole cover, said manhole ring and manhole cover maintained in a suspended position by said manhole retainer elements below said first load-carrying member and said second load-carrying member,   b. said first load-carrying member and said second load-carrying member maintaining a manhole grade aligned with a roadway grade.   
   
   
       17 . The assembly according to  claim 10  wherein said inflatable form liner further comprises:
 a. an adjustable conically shaped plastic form liner wall;   b. an inflatable bladder configured in a substantially circumferential doughnut arrangement.   
   
   
       18 . The assembly according to  claim 10  wherein said inflatable form liner further comprises: a flat tube inflatable bladder comprising an outer wall and an inner wall, said outer wall forming a seal between said manhole ring and said manhole cone. 
   
   
       19 . The assembly according to  claim 18  wherein said flat tube inflatable bladder further comprises: said outer wall comprising a puncture resistant material. 
   
   
       20 . The assembly according to  claim 10  wherein said cross member joint further comprises: said first load-carrying member and said second-carrying member resisting a maximum midspan moment provided by said carried load and applied at the crossmember joint. 
   
   
       21 . The assembly according to  claim 10  wherein said cross member joint further comprises:
 a. said first load-carrying member comprising a first top cross sectional compression zone, said first top cross sectional compression zone interrupted by said first midspan seat;   b. said second load carrying member comprising a second bottom cross sectional tension zone, said second bottom cross sectional tension zone interrupted by said second midspan seat;   c. said second midspan seat of said second load-carrying member further comprising a second top compression zone to transfer a first compression force in said first load-carrying member across said first midspan seat;   d. said first midspan seat of said first load carrying member further comprising a first bottom tension zone to transfer a second tension force in said second load carrying member across said second midspan seat.   
   
   
       22 . The assembly according to  claim 21  wherein said first bottom tension zone further comprises:
 a. a first cross-sectional area of said first load carrying member, said first cross-sectional area applied along a first seat length of said first mid-span seat;   b. a bottom tension member connecting said second bottom cross-sectional tension zone interrupted by said second midspan seat.   
   
   
       23 . The assembly according to  claim 21  wherein said first midspan seat further comprises:
 a. a substantially rectilinear seat extending from a top edge of said first load-carrying member to about a central axis of said first load-carrying member;   b. said rectilinear seat further comprising a width substantially great enough to accept a cross-sectional width of said second load-carrying member.   
   
   
       24 . The assembly according to  claim 21  wherein said second midspan seat further comprises:
 a. a substantially rectilinear seat extending from the bottom edge of said second load-carrying member to about a central axis of said second load-carrying member;   b. said second rectilinear seat further comprising a width substantially great enough to accept a cross-sectional width of said first load-carrying member.   
   
   
       25 . The assembly according to  claim 10  wherein said first midspan seat further comprises:
 a. a first transversely aligned through port perpendicular to a longitudinal lengthwise axis of said first load-carrying member, said transversely aligned through port ranged to receive said second load-carrying member comprising a second load-carrying member cross-sectional area.   
   
   
       26 . The joint according to  claim 25  wherein said first transversely aligned through port further comprises: a circular cross-section to receive said second load-carrying member comprising a circular cross-section. 
   
   
       27 . The joint according to  claim 25  wherein said first transversely aligned through port further comprises: a rectilinear cross-section to receive said second load-carrying member comprising a rectilinear cross-section. 
   
   
       28 . An installation method of a manhole cover, said method comprising:
 b. maintaining an excavation region encompassing a manhole cone;   c. assembling a first load-carrying member and a second load-carrying member by:
 i. seating a second midspan seat of said second load-carrying member with a first midspan seat of said first load-carrying member to form a midspan crossmember joint; 
   d. attaching said first and second load-carrying members to a manhole iron rim;   e. placing said assembly at a roadway grade;   f. positioning said manhole iron rim above said manhole cone;   g. installing an inflatable form liner between said manhole iron rim and said manhole cone;   h. filling said excavation region with concrete;   i. removing said first load-carrying member and said second load-carrying member from said manhole iron rim;   j. curing said concrete;   k. laying asphalt above said concrete at said roadway grade.   
   
   
       29 . An assembly for installation of a manhole cover, said assembly comprising:
 a. means for excavating an excavation region encompassing a manhole cone;   b. means for assembling a first load-carrying member and a second load-carrying member said means comprising:
 i. seating a second midspan seat of said second load-carrying member with a first midspan seat of said first load-carrying member to form a midspan crossmember joint; 
   c. means for attaching said first and second load-carrying members to a manhole iron rim;   d. means for placing said assembly at a roadway grade;   e. means for positioning said manhole iron rim above said manhole cone;   f. means for installing an inflatable form liner between said manhole iron rim and said manhole cone;   g. means for filling said excavation region with concrete;   h. means for removing said first load-carrying member and said second load-carrying member from said manhole iron rim;   i. means for curing said concrete;   j. means for laying asphalt above said concrete at said roadway grade.