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A construction structure and method for lateral expansion of a large-span cavern based on a narrow underground passage

A technology of underground passages and construction methods, which is applied to underground chambers, earth drilling, mining equipment, etc., can solve problems such as slow construction progress and limited transportation organization, and achieve the effect of improving flexibility

Active Publication Date: 2017-07-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of slow construction progress and limited transportation organization in the lateral expansion of large-span caverns in narrow underground passages, the present invention provides a construction structure and method for lateral expansion of large-span caverns based on narrow underground passages

Method used

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  • A construction structure and method for lateral expansion of a large-span cavern based on a narrow underground passage
  • A construction structure and method for lateral expansion of a large-span cavern based on a narrow underground passage
  • A construction structure and method for lateral expansion of a large-span cavern based on a narrow underground passage

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Embodiment 1

[0025] Embodiment 1: as Figure 1-3 As shown, a construction structure based on the lateral expansion of a narrow underground passage to expand a large-span cavern, including an advanced small conduit 1, an anchor rod 2, a supporting steel frame 3, a transition section 4, a triangular soil body 5, and a horizontal communication passage 6, Remaining soil 7;

[0026] The front end of the advanced small conduit 1 is provided with a slurry overflow hole, and the cement slurry is injected before excavation, and is distributed on the vault of the excavation cavern, and the direction is consistent with the excavation direction of the cavern; the anchor rod 2 is inserted into the surrounding rock mass radially along the cavern , the supporting steel frame 3 is set up on both sides of the pilot pit when the bilateral pilot pit is excavated, and the transition section 4 is the step excavation soil mass in the pilot pit on both sides; the triangular soil mass 5 is located above the step ...

Embodiment 2

[0037] Embodiment 2: as Figure 1-3 As shown, a construction structure based on the lateral expansion of a narrow underground passage to expand a large-span cavern, including an advanced small conduit 1, an anchor rod 2, a supporting steel frame 3, a transition section 4, a triangular soil body 5, and a horizontal communication passage 6, Remaining soil 7;

[0038] The front end of the advanced small conduit 1 is provided with a slurry overflow hole, and the cement slurry is injected before excavation, and is distributed on the vault of the excavation cavern, and the direction is consistent with the excavation direction of the cavern; the anchor rod 2 is inserted into the surrounding rock mass radially along the cavern , the supporting steel frame 3 is set up on both sides of the pilot pit when the bilateral pilot pit is excavated, and the transition section 4 is the step excavation soil mass in the pilot pit on both sides; the triangular soil mass 5 is located above the step ...

Embodiment 3

[0048] Embodiment 3: as Figure 1-3 As shown, a construction structure based on the lateral expansion of a narrow underground passage to expand a large-span cavern, including an advanced small conduit 1, an anchor rod 2, a supporting steel frame 3, a transition section 4, a triangular soil body 5, and a horizontal communication passage 6, Remaining soil 7;

[0049] The front end of the advanced small conduit 1 is provided with a slurry overflow hole, and the cement slurry is injected before excavation, and is distributed on the vault of the excavation cavern, and the direction is consistent with the excavation direction of the cavern; the anchor rod 2 is inserted into the surrounding rock mass radially along the cavern , the supporting steel frame 3 is set up on both sides of the pilot pit when the bilateral pilot pit is excavated, and the transition section 4 is the step excavation soil mass in the pilot pit on both sides; the triangular soil mass 5 is located above the step ...

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Abstract

The invention relates to a construction structure and method for laterally expanding a large-span cavern based on a narrow underground passage, and belongs to the field of underground building structures. The front end of the advanced small conduit of the present invention is provided with a slurry overflow hole, and the cement slurry is injected before excavation, and is distributed on the vault of the excavation cavern, and the direction is consistent with the excavation direction of the cavern; the anchor rod is inserted radially into the surrounding rock mass along the cavern, When excavating the double-sided pilot pit, the protective steel frame is set up on both sides of the pilot pit, and the transition section is the soil mass excavated by steps in the pilot pits on both sides; The upper soil body with the same width as the connecting channel; the horizontal connecting channel is located between the pilot pits on both sides; the remaining soil body is located above the entrance of the pilot pit section. The invention is beneficial to simultaneous and reasonable connection of processes, avoids interference among various processes, is beneficial to speeding up the construction progress and shortening the construction period, and is beneficial to improving the flexibility of traffic organization.

Description

technical field [0001] The invention relates to a construction structure and method for laterally expanding a large-span cavern based on a narrow underground passage, and belongs to the field of underground building structures. Background technique [0002] The double-side-wall pilot-pit method is a construction method mainly used in the excavation of large-span caverns, but the common double-side-wall pilot-pit method has the following problems: one-way construction, slow construction progress; limited traffic organization in the cave, Especially when expanding the large-span cavern laterally from the existing narrow underground passage, large-scale construction and transportation equipment cannot enter through the existing passage, and small-scale excavation equipment is required to manually excavate and manually transport the muck. More significant, and the faster the construction and excavation progress, the higher the requirement for the smoothness of muck transportatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D13/02
Inventor 杜永刚丁祖德李夕松曹净
Owner KUNMING UNIV OF SCI & TECH
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