Rapid-construction method for rapid change of small-section into large-section tunnel

A construction method and large-section technology, applied in tunnels, earthwork drilling, mining equipment, etc., can solve problems such as unfavorable mucking, feeding, narrow working face of small pilot pits, and difficulty in guaranteeing the construction period, so as to achieve good social and economic benefits. Benefits, strong construction safety and stability, and reasonable support measures
CN100487224CInactive Publication Date: 2009-05-13CHINA TIESIJU CIVIL ENG GRP CO LTD +1
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA TIESIJU CIVIL ENG GRP CO LTD
Publication Date
2009-05-13
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a quick construction method that small section is changed to big section in tunnel construction abruptly, characterized in that first of all, small heading on the one side of small section is transited to side heading on the relative side of big section; then by the portrait space formed in side heading of the big section transverse heading is dug on the big section; permanent early support for the big section is constructed in the transverse heading so as to form permanent early closed ring for all section; the whole early support for big section is in the transverse heading; digging and support for big section tunnel is constructed on the front and back ends of the big section in the working plane formed by the transverse heading. The invention is provided with low cost, good safety and simple construction technology so on.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field:

[0001] The invention relates to a construction method for a sudden section of a tunnel from small to large. Background technique:

[0002] Such as figure 1 As shown, in the construction of subway tunnels, the transition from a standard section with an excavation size of 5.8Γ—6.23m to a large cross section with a maximum excavation size of 13.950Γ—9.354m was adopted at the boundary between the standard section and the crossing tunnel. The pilot pit shall be constructed first, and then reversely expanded after reaching the cross section of the turnout. The specific method is to operate according to the following steps:

[0003] 1. From the double-arch center hole (mileage YK15+159), start temporary small pilot pit construction.

[0004] 2. When the small pilot pit is constructed to the B-shaped section (mileage YK15+200), the small pilot pit starts to climb and expand.

[0005] 3. The small pilot pit is expanded and dug into a B-shaped section after passing through ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More