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Advanced grouting method

An advanced grouting and grouting technology, which is applied in earthwork drilling, shaft equipment, wellbore lining, etc., to reduce the probability of subsidence and facilitate excavation

Active Publication Date: 2021-06-25
CHINA RAILWAY SHISIJU GROUP CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide an advanced grouting method to solve the problem that the advanced grouting method in the prior art is not suitable for the distance between the pilot tunnel and the existing building recent situation

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Embodiment Construction

[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] like Figure 1 to Figure 3 As shown, there is a first pilot tunnel 10 below the existing building 1, and the advanced grouting method of the present embodiment includes:

[0031] Step S40: mark the first grouting hole position 20 on the palm surface of the first guide hole 10, the first grouting hole position 20 includes a plurality of first grouting hole positions 20 along the first guide hole 10 The two side edges and the bottom edge of the tunnel surface are arranged at intervals, and there is no first grouting hole position 20 on the tunnel surface of the first pilot hole 10 near the top edge of the first pilot tunnel 10;

[0032] Step S50: take the first grouting hole 20 as the st...

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Abstract

The invention provides an advanced grouting method. A first pilot tunnel is arranged below an existing building. The advanced grouting method comprises the steps that S40, a plurality of first grouting hole positions are marked on the tunnel face of the first pilot tunnel, the multiple first grouting hole positions are arranged along the two side edges and the bottom edge of the tunnel face of the first pilot tunnel at intervals, and the top edge, close to the first pilot tunnel, of the tunnel face of the first pilot tunnel is not provided with the first grouting hole positions; S50, the first grouting hole positions serve as drilling starting points to drill towards the inner wall of the first pilot tunnel close to the first grouting hole positions so as to form first drilled holes, and the drilling end points of the first drilled holes are located on the circumferential outer side of the first pilot tunnel and located on the front side of the tunnel face in the excavation direction; and S60, grouting is conducted in the first drilled holes. By applying the technical scheme, the problem that an advanced grouting method in the related technology is not suitable for the condition that the distance between the pilot tunnel and the existing building is small can be effectively solved.

Description

technical field [0001] The invention relates to the field of tunnel excavation, in particular to an advanced grouting method. Background technique [0002] At present, in the process of tunnel excavation, the situation that the tunnel needs to pass through the existing buildings will be encountered, especially in the process of subway tunnel excavation, it is often encountered that it is necessary to dig a new tunnel under the already dug tunnel, so as to This forms the hub station of the transfer line. At this time, the tunnel that has been dug is the existing building, and the tunnel that needs to be newly excavated becomes the lower layer of the existing building. During the construction of the lower storey, the settlement of the existing building needs to be strictly controlled. At present, advance grouting is generally carried out before the excavation of the pilot tunnel of the lower storey, and the initial support is carried out after the excavation of the pilot tunn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/105Y02E10/20
Inventor 梁尔斌王华伟张志伟王志康郑凯靳德勇刘小勇孙孝锋
Owner CHINA RAILWAY SHISIJU GROUP CORP
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