Telescoping lining and support structure and method for lining tunnels and shafts

{
  "publication_number": "US3645102A",
  "country": "US",
  "kind": "A",
  "title": "Telescoping lining and support structure and method for lining tunnels and shafts",
  "abstract": "A novel telescoping lining and support structure and method for lining tunnels and shafts is provided in which a plurality of first chordal segments are drawn into a tunnel or shaft hole in a reduced diameter state of compression, expanded diametrically one after another in place in said tunnel or shaft and keyed in the expanded state by a second smaller chordal segment which completes an annular ring segment with the first chordal segment in place.",
  "claims": [
    "1. A method of lining a tunnel and the like comprising the steps of: a. tunneling a shaft into the earth, b. carrying a plurality of first chordal segments into said tunnel shaft as tunneling progresses, said first segments being reduced in diameter by compression, expanding said segments diametrically one after another in place in said shaft, c. inserting a second chordal segment between the ends of said expanded first chordal segment to form an annular segment, and d. continuing to insert compressed first segments through said completed rings and expanding the same in place one after another to complete a lining.",
    "2. A method as claimed in claim 1 wherein the first chordal segments are provided with spaced openings and grout is pumped therethrough to fill any voids between the completed annular segments and the tunnel shaft.",
    "3. A method as claimed in claim 1 wherein the first chordal segments are carried into place by pulling with a cable and winch.",
    "4. A method as claimed in claim 1 wherein the first chordal segments are carried into place by hydraulic jacks."
  ],
  "cpc": [
    "E21D 11/102",
    "E21D 11/08",
    "E21D 9/005"
  ],
  "ipc": [
    "E21D 11/08",
    "E21D 11/10",
    "E21D 9/00"
  ],
  "assignees": [
    "Commercial Shearing Inc"
  ],
  "inventors": [
    "Nicholas Chlumecky"
  ],
  "filing_date": "1970-12-28",
  "publication_date": "1972-02-29",
  "grant_date": "1972-02-29",
  "priority_date": "1970-12-28",
  "application_number": "US-3645102D-A",
  "family_id": "22286890",
  "cited_by_count": 23,
  "citations": [
    "US1137442A",
    "US1372856A",
    "US1751147A",
    "FR1099147A",
    "FR1163356A",
    "FR1278994A",
    "US3206824A"
  ]
}