Composite lining suitable for surrounding rock after-deformation

A composite lining and large-deformation technology, applied in shaft lining, tunnel lining, underground chamber, etc., can solve problems such as inability to adapt to surrounding rock deformation and fault dislocation deformation

Inactive Publication Date: 2005-12-21
NANJING HYDRAULIC RES INST THE MINISTRY OF WATER RESOURCES THE MINIST
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the current lining cannot adapt to the deformation of the surrounding rock after lining and the deformation of the fault, the present invention proposes a composite lining, which is composed of an inner layer and an outer layer, the inner layer is rigid, and the outer layer is flexible

Method used

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  • Composite lining suitable for surrounding rock after-deformation

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Embodiment Construction

[0013] Such as figure 1 as shown, figure 1 It is a schematic diagram of the composite lining structure of a hydraulic tunnel, and the section of the tunnel is a circle with a diameter of 6.5m. Immediately after the excavation of the tunnel, system bolts 6 are installed, and the surrounding rock 7 is initially supported. space, pour concrete in the formwork to form the inner layer 1. After the inner layer 1 reaches the designed strength, the reserved space is filled with filling materials formulated according to the formula to form the outer layer 2 . The inner layer 1 is a C30 concrete layer with a thickness of 60cm, and the outer layer 2 is a filling layer with a thickness of 50cm. The filling materials are clay, wood, sand, stones and water, and the volume content of clay is 35%.

[0014] Such as figure 1 As shown, when the active fault dislocation deformation 3 occurs, the outer layer 2 undergoes shear flow deformation along with the dislocation deformation of the fault...

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Abstract

The invention relates to a complex lining adaptive to the great deformation of adjacent rock, relating to underground engineering supporting structure. To resolve the problem that existing linings is no suitable for the evening converge and fracture deformation, the invention discloses a complex lining which includes inner layer and outer layer, the inner layer is concrete layer of thickness 30 to 200 cm and is a rigid layer, the outer layer is a filling layer filled with dirt, rock, sand, and water with a thickness of 30 -150 cm, and is a soft layer. The complex lining adapts the fracture deformation with its deformable outer layer while providing proper support to the adjacent rock protecting inner layer and supporting adjacent rock to stabilize the rock.

Description

[0001] Field: [0002] The invention relates to a composite lining adaptable to the later deformation of surrounding rock, which belongs to the field of underground engineering supporting structures. Background technique: [0003] In underground engineering such as hydraulic tunnels, traffic tunnels and mine roadways, lining is one of the supporting measures to protect the safety of underground spaces and control the stability of surrounding rocks. The current lining is mainly made of concrete (including reinforced concrete), which is characterized by rigidity. It is generally required to be close to the surrounding rock. If there is a gap between the surrounding rock and the lining, it is also required to use the method of backfilling and grouting. The gap is filled, and the backfill material is generally concrete or cement mortar, which is also rigid after solidification. When the surrounding rock deforms, the lining will immediately generate supporting reaction force to re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/04
Inventor 汤雷
Owner NANJING HYDRAULIC RES INST THE MINISTRY OF WATER RESOURCES THE MINIST
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