I fell in love with 60s and 70s scifi books (cheap at the bookstore) and they had a bit of a civilization collapse golden age for a while. I can give you the names of a few books and stories. Most of them rate fairly well in my mind for accuracy, but you'd have to judge for yourself how realistic they'd be. These authors represent what was once called 'hard scifi', which largely attempts to depart from the blatantly impossible and adhere to the vast majority of science as it was known at the time. I don't often find fiction in any form as dedicated to scientific rigor. That said, the raw engineering of post apocalyptic survival and quality of life improvement isn't often treated directly, but is woven into the context and background of a story. The following recommendations are likely to be best suited to someone who already likes science fiction, but is looking for more technical accuracy than your average Star Wars or Star Trek can provide.
The Postman - David Brin
Don't go by the movie, a lot gets lost translating it from the book. A post-apocalypse story following a down and out impostor who assumes the identity of a postal delivery worker. Not the strongest work in scientific accuracy, but there are subtle considerations made to circumstance and human interaction.
Earth - David Brin
Not so much a disaster book, but far and away my favorite work of fiction. It's a fifty year prediction written in 1988 about a man made disaster, but I think the genius of this work is in it's treatment of human relations. Absolutely brilliant and immersive storytelling. This book touches on almost every aspect of the future imaginable, from street gangs and their music, to household technology, transportation in an energy crisis, global warming, species preservation, the growing elderly population, and theoretical physics.
Lucifer's Hammer - Larry Niven and Jerry Pournelle
This one is an in-depth treatment of a comet impact and it's early aftermath. The memory of this book made me shake my head in disappointment as Hollywood went through it's 'Armageddon' and 'Deep Impact' phase. Hollywood turned this into a bit of a cliche, but it's the original and worth reading.
Inconstant Moon - Larry Niven
This is a short story from the age when it was an art form. I won't say much or I'll spoil it. It can be found in Larry Niven's compilation 'N-Space' and read within the bookstore, as it is less than thirty pages in small paperback form.
Tales of Known Space - Larry Niven
There are dozens of stories ranging from a few pages to novels written by Larry Niven that roughly adhere to a set of characters and a time line. These are collectively known as 'Known Space' stories, and are spread throughout his work. All told this strays quite far from post-apocalyptic engineering, but it's excellent scifi if you want to delve deeper.
The Foundation Series - Isaac Asimov
This series started as one of the earlier scifi works, so this one's a bit further out there. The series starts as a galaxy wide government in collapse refuses to acknowledge it's coming decline, and a scientist named Hari Seldon socially engineers his own exile to the outer reaches of the galaxy with the funding and planning to see the coming dark age through and reduce it's devastation. The interweaving of technology, politics, economics, and human nature are stunning, but to enjoy it you must forgive a certain quantity of the relatively unbelievable, such as telepathy and microminiature fusion batteries.
Emergence - David R. Palmer
Probably my favorite true post-apocalyptic scifi novel. This is one of those great books that just never got the recognition it deserved. This book follows an uncommonly smart 12 year old girl in her journey to reunite with humanity after world war three. It's quite an adventure, and may appeal to those who's tastes don't usually include science fiction.
There's a lot more good stuff out there, and more recommendations available, but I've already wandered a long way off topic.
I hope someone finds these useful, I do have a passion for good sci-fi.