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Anchor rod construction process for ensuring safety and quality

An anchor construction and quality technology, which is applied in the installation of anchors, shaft equipment, shaft lining, etc., can solve the problems of vault cavity, continuous collapse cavity, hidden quality problems, etc., and achieve the effect of solving hidden safety hazards and ensuring construction quality.

Active Publication Date: 2019-03-15
中交中南工程局有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the construction process of the tunnel site area, after excavation, the face of the tunnel will have problems of falling blocks and continuous cavity collapse. After the initial support is completed, there may be holes in the vault, which will pose safety and quality risks at the construction site.

Method used

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  • Anchor rod construction process for ensuring safety and quality
  • Anchor rod construction process for ensuring safety and quality
  • Anchor rod construction process for ensuring safety and quality

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] see Figure 1-3 , a bolt construction process that ensures safety and quality, the steps are as follows:

[0039] S1. Pre-construction preparations, including construction measurement and grout configuration. The surveyors must accurately determine and record the drilling hole position; the grout configuration is 10min solidification, 15min solidification, and 20min solidification double-fluid slurry ratio, according to the actual grouting situation, carry out slurry selection;

[0040] S2. The construction of the small conduit in advance, the length of the small conduit in advance is 4m, the circumferential direction is 35cm, the drilling angle is controlled at 6-10°, and the drilling range is within 120° of the center line of the tunnel. The air surface provides space for the three-arm rock drilling rig to set self-propelled bolts;

[0041] S3. The face of the face is closed; the face of the face is closed in two steps: the first step is to spray a layer of cement s...

Embodiment 2

[0064] see Figure 1-3 , in the embodiment of the present invention, a kind of bolt construction technology that guarantees safety, quality comprises the following steps:

[0065] S1. Pre-construction preparations, including construction measurement and grout configuration, in which the surveyors must accurately determine and record the drilling hole position; the grout configuration is 10min solidification, 15min solidification, and 20min solidification double-fluid slurry ratio, according to the actual grouting situation , for slurry selection;

[0066] S2. The construction of the small conduit in advance. The length of the small conduit in advance is 5m, and the circumferential direction is 40cm. Provide space for the three-arm rock drilling rig to set self-propelled bolts;

[0067] S3. The face of the face is closed; the face of the face is closed in two steps: the first step is to spray a layer of cement slurry within the vertical 50cm range of the anchor bolt, and then...

Embodiment 3

[0090] see Figure 1-3 , a bolt construction process that ensures safety and quality, S1, pre-construction preparations, including construction measurement, grout configuration, wherein surveyors must accurately determine the drilling hole position and record; grout configurations are 10min solidification, 15min solidification, 20min solidified double liquid slurry ratio, according to the actual grouting situation, the slurry selection;

[0091] S2. The construction of the small conduit in advance. The length of the small conduit in advance is 6m, and the circumferential direction is 45cm. , to provide space for the three-arm rock drilling rig to set self-propelled bolts;

[0092] S3. The face of the face is closed; the face of the face is closed in two steps: the first step is to spray a layer of cement slurry within the vertical range of 53cm of the anchor rod, and then spray 12cm of C25 spray coagulant on the entire face of the face , form a 1:0.2 slope after plain sprayi...

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Abstract

The invention discloses an anchor rod construction process for ensuring safety and quality and relates to the technical field of construction. The problems of chip off-falling and continuous cavity collapse after face excavation are mainly solved. The anchor rod construction process comprises the following steps of S1 early-stage preparation of construction, including construction surveying and slurry preparation, S2 advanced small pipe construction, S3 face closing, S4 taking place of a drill jambo, S5 drilling, S6 hole position plugging, S7 grouting and reinforcement, S8 grouting parameter design, S9 execution of a grouting process, S10 execution of excavation operation, wherein the excavation operation is executed after grouting completion, and it is checked whether a slurry diffusion effect meets the purpose of reinforcing a surrounding rock. By adopting the anchor rod construction process, the problems of chip off-falling and continuous cavity collapse after face excavation can beeffectively solved, the potential safety hazards existing in a construction site are solved, the construction quality is effectively ensured, and the process is suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a safety and quality bolt construction technology. Background technique [0002] Most of the surface water in the tunnel site area is the runoff of rainwater collected along both sides of the hillside during the rainy season, and most of them are seasonal streams with a small amount of water. According to storage conditions and hydrodynamic characteristics, groundwater can be divided into two types: loose layer pore water and bedrock fissure water. The tunnel site area is located in the hinterland of the Eurasian continent in the mid-latitude, and belongs to the temperate continental arid climate. The evaporation is strong, the autumn is clear and the temperature drops rapidly, and the winter is cold and the lower air layer is stable. The tunnel site area generally belongs to the high-high mountain landform area, with hilly landforms and inter-mountain valley landforms loc...

Claims

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Application Information

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IPC IPC(8): E21D20/00E21D20/02E21D9/00E21D11/14E21D11/10
CPCE21D9/002E21D11/10E21D11/14E21D20/003E21D20/021
Inventor 邢冠林周思峰余昌平杨玉平黄海伦孙井建
Owner 中交中南工程局有限公司
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