CN108869872B - Installation and construction method for conventional electromechanical equipment of ultra-deep subway shaft - Google Patents

Installation and construction method for conventional electromechanical equipment of ultra-deep subway shaft Download PDF

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Publication number
CN108869872B
CN108869872B CN201810795276.1A CN201810795276A CN108869872B CN 108869872 B CN108869872 B CN 108869872B CN 201810795276 A CN201810795276 A CN 201810795276A CN 108869872 B CN108869872 B CN 108869872B
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China
Prior art keywords
pipeline
channel steel
construction
bracket
pipelines
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CN201810795276.1A
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CN108869872A (en
Inventor
裴健
高立状
李二静
张永煜
田逢春
史进学
高志鹏
马宇翔
王辉
岳庭
马宇驰
陈凯
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China Railway Sixth Group Co Ltd
Construction and Installation Engineering Co Ltd of China Railway Sixth Group Co Ltd
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China Railway Sixth Group Co Ltd
Construction and Installation Engineering Co Ltd of China Railway Sixth Group Co Ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/028Laying or reclaiming pipes on land, e.g. above the ground in the ground
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/06Accessories therefor, e.g. anchors
    • F16L1/09Accessories therefor, e.g. anchors for bringing two tubular members closer to each other
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/02Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets partly surrounding the pipes, cables or protective tubing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/04Devices damping pulsations or vibrations in fluids
    • F16L55/045Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer

Abstract

The invention relates to a subway construction process, in particular to an installation and construction method of conventional electromechanical equipment of an ultra-deep subway shaft, which mainly solves the problems of difficult butt joint of pipelines of the ultra-deep shaft, poor practicability of a traditional pipeline bracket, damage to a water hammer at the bottom of the pipeline and the like. In the construction method, the hoisting ring at the end part of the pipeline is used as a pipe orifice butt-joint device for guiding and fixing, so that the butt joint of the ultra-deep vertical shaft pipeline is accurate, simple and convenient; the BIM technology is combined with the traditional construction method, so that the pipeline bracket is deepened, and the practicability of the pipeline bracket is enhanced; manufacturing a water hammer protector by adopting a principle of Newton's third law about acting force and reacting force; the installation position of the expansion piece is calculated by adopting MIDAS modeling, the compensation range of the expansion piece is determined by combining the BIM simulation analysis technology with the design requirement, and the expansion piece is directly fixed to the end part of the pipeline for installation, so that the installation difficulty of the expansion piece is reduced.

Description

Installation and construction method for conventional electromechanical equipment of ultra-deep subway shaft
Technical Field
The invention relates to a subway construction process, in particular to a conventional electromechanical equipment installation construction method for an ultra-deep subway shaft.
Background
At present, along with the continuous increase of the underground depth, the ultra-deep vertical shaft is more and more common, and the technical defects of the installation and construction of corresponding conventional electromechanical equipment are increasingly exposed. The main problems of the prior construction technology are as follows: the butt joint difficulty and the precision of ultradeep shaft pipeline are lower, and traditional pipeline bracket is relatively poor for ultradeep shaft practicality, and the water hammer effect is great to the system injury. The invention aims to overcome the problems and provides a conventional electromechanical equipment installation and construction method for an ultra-deep subway shaft.
Disclosure of Invention
The invention provides a construction technology which is accurate, convenient, practical, operable, safe, reliable, advanced and simple, and aims to solve the technical problem of installation and construction of conventional electromechanical equipment of the conventional ultra-deep shaft.
The invention is realized by adopting the following technical scheme: the installation and construction method of the conventional electromechanical equipment of the ultra-deep subway shaft comprises the following steps:
(1) construction planning preparation: compiling a special construction scheme, after the scheme is compiled, reviewing and expert argumentation are carried out, and after the construction scheme passes, constructing according to the construction scheme;
(2) erecting a construction platform;
(3) installing channel steel of the pipeline bracket: firstly, installing channel steel of a U-shaped clamp support of a pipeline at the uppermost side of a vertical shaft, hanging a steel wire rope heavy hammer around the channel steel to the bottom of the vertical shaft, installing support channel steel at the bottom of the vertical shaft, drawing through wires from the upper channel steel and the lower channel steel, and installing each support channel steel according to the support interval and the through wires;
after the channel steel is installed, pulling the U-shaped clamp support to be in a line, sequentially measuring the size of the U-shaped clamp support at each position from top to bottom by an operator by using a hanging basket, marking the size on the wall of the vertical shaft and numbering, and uniformly manufacturing the supports according to the size data of the U-shaped clamp supports at each position and numbering;
(4) the pipeline installation comprises the steps that firstly, hoisting rings are arranged at the end parts of pipelines, the pipelines are hoisted in place by a hoist of a construction platform on the upper part of a vertical shaft, the pipelines at the bottom part directly fall to the ground and are fixed with the ground, secondly, the hoisting rings at the end parts of the pipelines are used as pipe orifice butt joints, the bottom parts of the pipelines at the upper part are accurately inserted into the pipe orifice butt joints of the pipelines at the lower part, the sizes and the numbers are recorded according to the wall of the vertical shaft, an operator takes a hanging basket to the U-shaped clamping bracket at the uppermost end of the pipeline at the upper part, the U-shaped clamping bracket is fixed by double nuts, the pipelines and bracket channel steels are fixed together;
(5) installing a pipeline bracket: in the pipeline welding process, a vertical pipeline bracket is welded on a pipeline and supported on a bracket channel steel;
(6) carrying out a pipeline hydrostatic test;
(7) connecting the pipeline with a horizontal pipeline at the bottom of the vertical shaft;
(8) and (3) installing a water hammer protector: the water hammer protector comprises channel steel fixed on the wall of the vertical shaft, and the channel steel is reinforced by a channel steel inclined strut and a ground steel pipe; the connecting elbow of the pipeline and the horizontal pipeline at the bottom of the vertical shaft is supported on the channel steel;
(9) testing and debugging; after the shaft pipeline is installed, performing a system strength test and a tightness test, and finally performing a water test operation;
(10) and (5) dismantling the construction platform.
The invention has the beneficial effects that:
compared with the traditional installation and construction technology of conventional electromechanical equipment of the ultra-deep subway shaft, the invention has the technical characteristics of accuracy, convenience, practicability, operability, safety, reliability, advancement, simplicity and the like, and has the following specific beneficial effects:
1. the method is accurate and convenient: the pipeline end part hoisting ring is used as the pipe orifice butt joint device to conduct guiding and fixing, and the beneficial effects are that the construction technology is accurate and convenient.
2. Practical and operable: deepening the pipeline bracket, which has the beneficial effect that the construction technology is practical and operable.
3. Safe and reliable: the water hammer protection measures are manufactured, and the beneficial effect is that the construction technology is safe and reliable.
Drawings
FIG. 1 is a schematic view of pipe end orifice docking adapter docking a pipe.
Fig. 2 is a top view of the deepened pipe support.
Fig. 3 is a side view of the deepened pipe support.
FIG. 4 is a schematic view of a deepened U-shaped card support.
Fig. 5 is a side view of the water hammer protector.
Fig. 6 is a top view of the water hammer protector.
In the figure: 1-bracket channel steel, 2-U-shaped clamp bracket, 3-pipeline bracket, 4-pipeline, 5-channel steel, 6-channel steel diagonal brace, 7-ground steel pipe, 8-connecting elbow and 9-vertical shaft bottom horizontal pipeline.
Detailed Description
The operational points of the construction method of the present invention will be explained in detail with reference to the accompanying drawings.
Firstly, compiling a special construction scheme, and then reviewing and expert argumentation after the scheme is compiled, wherein after the construction scheme passes, construction is carried out according to the construction scheme; and (5) organizing personnel to set up a construction platform and set up safety protection. And secondly, mechanical equipment such as a winch, a hanging basket and a crane enters the field for inspection, and an organizer carries out installation and debugging. And finally, performing prefabrication processing on pipelines, supports and the like.
The pipeline end part hoisting ring is used as a pipe orifice butt joint device to conduct guiding and fixing, the pipeline hoisting ring is made of round steel with the diameter of 20mm, the hoisting ring is welded inside the pipeline in a semi-elliptical shape, and the two sides of the hoisting ring are respectively welded by 10cm in an overlapping mode. Firstly, a hoisting ring is arranged in the end part of the pipeline, the pipeline is hoisted in place by a hoist on the upper part of the vertical shaft, and the pipeline on the bottom part directly falls to the ground and is fixed with the ground. Secondly, the pipe end part hoisting ring cuts residual 10cm round steel to serve as a pipe orifice butt-joint device, and the bottom of the upper pipe is accurately inserted into the pipe orifice butt-joint device due to the fact that the outer diameters of the pipes are consistent. And finally, taking the pipeline butt joint device as a fulcrum, taking the hanging basket by an operator to reach the end part of the far fulcrum, and fixing the pipeline according to the principle of distance to distance. The whole pipeline butt joint process is accurate and convenient.
And the BIM technology is combined with the traditional construction method to deepen the pipeline bracket. The BIM technology is combined with a traditional pipeline support construction method, two pipeline supports suitable for an ultra-deep shaft are deeply designed and are respectively a U-shaped clamp support and a pipeline bracket support, and the U-shaped clamp supports and the bracket supports are arranged every 3 m. The bracket support is the stationary vane, supports on the support channel-section steel, prevents that the vertical slip of pipeline from causing the pipeline to topple. And (3) simulating the construction process by adopting a BIM model, and performing unified prefabrication processing on the pipeline support by adopting a statistical analysis method. The whole process is strong in practicability and high in operability. Installing a pipeline bracket: firstly, mounting U-shaped clamp support channel steel of an uppermost pipeline, hanging a steel wire rope heavy hammer to the bottom of a vertical shaft around the channel steel, mounting support channel steel at the bottom of the vertical shaft, drawing through wires from the upper channel steel and the lower channel steel, and mounting each support channel steel according to the support interval and the through wires; draw U type card support logical line after the channel-section steel installation is accomplished, operating personnel takes the construction platform hanging flower basket and measures each position U type card support size from top to bottom in proper order, marks the size in the shaft wall and serial number, makes the support and serial number in unison according to each position U type card support size data, according to shaft wall record size and serial number, installs U type card support and support bracing respectively.
And (3) adopting the principle of Newton's third law on acting force and reacting force to manufacture a water hammer protection measure. And (4) analyzing the stress of the pipeline by combining a construction site, and analyzing the damage of the water hammer at the bottom of the pipeline by adopting stress software. The water hammer protector taking the center of the connecting elbow as a stress point is deeply designed by applying the principle of acting force and reacting force and adopting the BIM technology. The protector is composed of a channel steel and a channel steel reinforcing part. And a water hammer protector is added, so that the whole system is safer and more reliable.
The red land station is the 2 nd station of the first-stage project of the ten-line of the Chongqing rail transit, and the station is wholly positioned below the 6 th line of the Chongqing rail transit, vertically crossed with the 6 th line and is the deepest subway station in the whole country. The No. 3 air shaft is positioned at the small mileage end of the red land station, has the cross-sectional dimension of 6.7 x 18.3 meters and the height of 91 meters, and is the deepest shaft in the country. No. 3 blast shaft wall has the abnormal shape, and conventional electromechanical device installation work volume is big, and including 4 air conditioner pipelines, one crane span structure, the structure silencer 3, the job site installation engineering degree of difficulty is big. Through the application of the technology, the construction period of the conventional electromechanical equipment installation project of the Chongqing rail transit ten-line laterite ground ultra-deep shaft is shortened by about 1.5 months, no safety accident occurs in the whole process, the electromechanical system is safe and reliable to operate, and the consistency of owners, design and supervision units is well received.

Claims (1)

1. The installation and construction method of the conventional electromechanical equipment of the ultra-deep subway shaft is characterized by comprising the following steps of:
(1) construction planning preparation: compiling a special construction scheme, after the scheme is compiled, reviewing and expert argumentation are carried out, and after the construction scheme passes, constructing according to the construction scheme;
(2) erecting a construction platform;
(3) installing channel steel of the pipeline bracket: firstly, installing channel steel of a U-shaped clamp support of a pipeline at the uppermost side of a vertical shaft, hanging a steel wire rope heavy hammer around the support channel steel (1) to the bottom of the vertical shaft, installing the support channel steel (1) at the bottom of the vertical shaft, drawing through wires from the upper channel steel and the lower channel steel, and installing each support channel steel (1) according to the distance between supports and the through wires;
after the bracket channel steel is installed, pulling a U-shaped clamp bracket to be communicated, sequentially measuring the sizes of the U-shaped clamp brackets at all positions from top to bottom by an operator by using a hanging basket, marking the sizes on the wall of the vertical shaft and numbering, and uniformly manufacturing and numbering the brackets according to the size data of the U-shaped clamp brackets at all positions;
(4) the pipeline installation comprises the steps that firstly, hoisting rings are arranged at the end parts of pipelines, the pipelines are hoisted in place by a hoist of a construction platform on the upper part of a vertical shaft, the pipelines at the bottom part directly fall to the ground and are fixed with the ground, secondly, the hoisting rings at the end parts of the pipelines are used as pipe orifice butt joints, the bottom parts of the pipelines at the upper part are accurately inserted into the pipe orifice butt joints of the pipelines at the lower part, the sizes and the numbers are recorded according to the wall of the vertical shaft, an operator takes a hanging basket to the U-shaped clamping support at the uppermost end of the pipelines at the upper part, the U-shaped clamping supports (2) are fixed by double nuts, the pipelines and support channel steel (1) are fixed together;
(5) installing a pipeline bracket: in the pipeline welding process, a vertical pipeline bracket (3) is welded on a pipeline, and the pipeline bracket (3) is supported on a bracket channel steel (1);
(6) carrying out a pipeline hydrostatic test;
(7) connecting the pipeline with a horizontal pipeline at the bottom of the vertical shaft;
(8) and (3) installing a water hammer protector: the water hammer protector comprises channel steel (5) fixed on the wall of the vertical shaft, and the channel steel is reinforced by a channel steel inclined strut (6) and a ground steel pipe (7); a connecting elbow (8) of the pipeline and a horizontal pipeline (9) at the bottom of the vertical shaft is supported on the channel steel (5);
(9) testing and debugging; after the shaft pipeline is installed, performing a system strength test and a tightness test, and finally performing a water test operation;
(10) and (5) dismantling the construction platform.
CN201810795276.1A 2018-07-19 2018-07-19 Installation and construction method for conventional electromechanical equipment of ultra-deep subway shaft Active CN108869872B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104806822A (en) * 2015-04-16 2015-07-29 上海市安装工程集团有限公司 Combined type stand pipe and modularized installation method thereof
RU2601651C1 (en) * 2015-04-15 2016-11-10 Открытое акционерное общество "Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") Suspension support for sections of underground pipeline routing
CN206636563U (en) * 2017-04-19 2017-11-14 中国葛洲坝集团第五工程有限公司 A kind of Construction of Silo hanging basket stabilising arrangement
CN107662881A (en) * 2017-10-17 2018-02-06 上海市安装工程集团有限公司 Integral riser erecting device and its installation method in a kind of high stove pipe well

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2790828C (en) * 2010-02-25 2018-06-26 Terra Technologies, LLC Apparatus, systems and methods for the relocation of subsurface conduit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2601651C1 (en) * 2015-04-15 2016-11-10 Открытое акционерное общество "Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") Suspension support for sections of underground pipeline routing
CN104806822A (en) * 2015-04-16 2015-07-29 上海市安装工程集团有限公司 Combined type stand pipe and modularized installation method thereof
CN206636563U (en) * 2017-04-19 2017-11-14 中国葛洲坝集团第五工程有限公司 A kind of Construction of Silo hanging basket stabilising arrangement
CN107662881A (en) * 2017-10-17 2018-02-06 上海市安装工程集团有限公司 Integral riser erecting device and its installation method in a kind of high stove pipe well

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BIM技术在地铁车站施工管理中的应用;曾绍武;《现代隧道技术》;20180615;第18-27页 *

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