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Grouting construction process of pipeline inclined shaft engineering

A construction process and technology for inclined shafts, which are used in vertical shaft equipment, shaft lining, mining equipment, etc., can solve problems such as pipeline fatigue damage, pipeline slope instability, and hidden safety hazards, so as to completely cure engineering diseases, ensure pipeline stability, and ensure The effect of engineering quality

Active Publication Date: 2013-11-13
SICHUAN INST OF GEOLOGICAL ENG INVESTIGATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no mature filling material and technology at home and abroad to fill the holes, sinkholes and subsidence between inclined shafts, tunnels, flat caverns and pipelines, which will cause the pipelines to be exposed and swing in the caves, resulting in fatigue damage; groundwater Flowing along the holes in the cave body, the bottom and side walls of the cave will cause erosion, erosion, and collapse, which may lead to hidden dangers such as suspended pipelines and slope instability where the inclined shaft is located, posing a great safety hazard

Method used

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  • Grouting construction process of pipeline inclined shaft engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] like figure 1 As shown, the inclined shaft 1 of this project has an inclined length of 74.5m and an inclination angle of 27°. The surface layer is 3m of Malan loess and the lower part is Lishi loess. An optical cable, the oil pipeline is a φ660 steel pipe, and the optical cable is protected by an external casing of a φ114 steel pipe. The oil pipeline and optical cable are exposed in the well; a collapse occurs at the bottom of the ridge in the middle of the inclined shaft 1.

[0043] The rectification project is carried out according to the technological sequence of the present invention:

[0044] 1). Pipeline measurement: Before construction, use a pipe probe to perform pipeline measurement, and measure the specific positions of the upper wellhead 2 and lower wellhead 3 of the inclined shaft 1 and the actual buried depth of the pipeline;

[0045] 2). On-site chemical loess slurry ratio test: The chemical loess slurry ratio test is carried out on the site of the inclin...

Embodiment 2

[0061] The inclined shaft of this project is 36m long and the inclination angle is 31°. The surface layer is 3m of Malan loess and the lower part is Lishi loess. The inclined shaft is 1.3m high and 1.1m wide. An oil pipeline and an optical cable are laid in the well. The external casing of φ114 steel pipe is used for protection, and the oil pipeline and optical cable are exposed in the well.

[0062] The rectification project is carried out in accordance with the process sequence of the present invention: pipeline measurement→on-site chemical loess slurry ratio test→temporary rain protection and drainage around the inclined shaft→excavation of upper wellhead and lower wellhead→pipeline outer anti-corrosion layer detection and leakage repair→chemical loess slurry Well opening→backfilling and compacting at the lower wellhead→preparation and mixing of chemical loess slurry→injecting chemical loess slurry in sections of the inclined shaft→backfilling, compaction and waterproofing o...

Embodiment 3

[0065] The inclined shaft of this project is 126m long and the inclination angle is 22°. The surface layer is 4m of Malan loess and the lower part is Lishi loess. The external casing of φ114 steel pipe is used for protection, and the oil pipeline and optical cable are exposed in the well.

[0066] The rectification project is carried out in accordance with the process sequence of the present invention: pipeline measurement → on-site chemical loess slurry ratio test → temporary rain protection and drainage around the inclined shaft → upper wellhead, lower wellhead, auxiliary inclined shaft excavation → pipeline outer anti-corrosion layer detection and leakage repair → chemical loess slurry drilling → auxiliary inclined shaft excavation → lower wellhead backfilling and compaction → chemical loess slurry preparation and mixing → inclined shaft subsection injection of chemical loess slurry → auxiliary inclined shaft and upper wellhead backfilling, compaction and waterproofing → lan...

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Abstract

The invention discloses a grouting construction process of pipeline inclined shaft engineering. The process comprises the steps of pipeline location survey, on-site chemical loess grout ratio testing, temporary rain prevention and dewatering on the periphery of a well, excavation of an upper well opening and a lower well opening of an inclined shaft, detection and leakage supplementing of an outer anti-corrosive layer of a pipeline, drifting of chemical loess grout, excavation and supporting of a vertical shaft or the inclined shaft, plugging and punning and filling of the lower well opening of the inclined shaft, chemical loess grout mixing, segmental pouring of the chemical loess grout, punning and filling and water prevention of the vertical shaft or the inclined shaft and the upper well opening of the inclined shaft, and landform recovery. The construction process is suitable for engineering treatment of diseases of a pipeline inclined shaft in service, can perform location survey and rectification to the upper well opening and the lower well opening of the pipeline inclined shaft in service, overcomes drifting difficulties, and guarantees construction effects of filling of the lower well opening, segmental grouting amount, intermittence time, punning and filling and water prevention of the upper well opening, landform recovery and the like. The grouting construction process of pipeline inclined shaft engineering guarantees pipeline stability and engineering quality of the pipeline inclined shaft engineering, the construction effects are good, and the engineering diseases are removed. The process is also suitable for inclined shaft construction of a newly-built pipeline.

Description

technical field [0001] The invention relates to a pipeline construction technique, in particular to a pipeline construction technique for grouting inclined shaft engineering. Background technique [0002] In the landform area of ​​loess plateau, beams and ravines, the terrain undulates greatly. If a large excavation is used to lay pipe trenches where the pipeline crosses steep ridges, the amount of earthwork will be large, the construction progress will be slow, the safety risk will be large, the water and soil conservation project will be difficult, and the economic investment will be large. In recent years, inclined shafts, small-diameter tunnels and flat tunnels are often used for pipeline laying in loess areas. The internal space of the above-mentioned projects is often small, and there is no construction operation surface after pipeline laying is completed. At present, there is no mature filling material and technology at home and abroad to fill the holes, sinkhole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D5/04
Inventor 安世泽徐志诚潘国耀刘宗祥王向东张林谭超王敏钟涵翰徐江
Owner SICHUAN INST OF GEOLOGICAL ENG INVESTIGATION