CN112682064A - Pipe piece lofting and steel plate installation process - Google Patents
Pipe piece lofting and steel plate installation process Download PDFInfo
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- CN112682064A CN112682064A CN202011524145.3A CN202011524145A CN112682064A CN 112682064 A CN112682064 A CN 112682064A CN 202011524145 A CN202011524145 A CN 202011524145A CN 112682064 A CN112682064 A CN 112682064A
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Abstract
The invention belongs to the technical field of tunnel construction processes, and particularly relates to a pipe sheet lofting and steel plate mounting process. The method comprises the following steps: selecting a proper standard ring and a proper lining ring according to the deflection and deviation rectification requirements of the construction path; determining the width of the duct piece and the position parameters of the duct piece according to the trend of the interval curve, and respectively determining the size parameters of each upward block of the calibration ring and the wedge-shaped ring; pre-typesetting according to the interval curve trend; according to the splicing requirement of the lining rings, the number of the segmental stacking and the limitation of the field construction area in the pre-typesetting result; assembling and configuring special duct pieces; assembling and configuring negative ring duct pieces; the application aims to provide a duct piece lofting and steel plate installation process which can improve the existing construction process, improve the construction efficiency of an operation site and ensure smooth construction operation.
Description
Technical Field
The invention belongs to the technical field of tunnel construction processes, and particularly relates to a pipe sheet lofting and steel plate mounting process.
Background
With the progress of social science and technology and the increase of space transportation pressure, the underground space engineering in China is rapidly developed at present, numerous subway engineering is built or planned in all parts of the country, the local transportation situation is greatly improved, the development speed of regional economy is improved, but the underground space engineering is inevitable, in recent years, construction accidents caused by the non-standard construction and the improper construction process and other reasons also occur, as the tunnel construction environment is mostly positioned in the underground local closed space, once the accident occurs, the accident is difficult to treat and timely relieve disasters, meanwhile, the whole tunnel construction work is greatly delayed, the social and economic losses caused by the accident are often extremely high, and therefore, the existing construction process is needed to be improved, and the work efficiency and safety of tunnel constructors are improved.
Content of application
The application aims to provide a duct piece lofting and steel plate installation process which can improve the existing construction process, improve the construction efficiency of an operation site and ensure smooth construction operation.
In order to achieve the purpose, the following technical scheme is adopted in the application.
A tube sheet lofting and steel plate installation process comprises the following steps:
step 1, selecting proper standard rings and lining rings according to deflection and deviation rectifying requirements of a construction path;
step 2, determining the width of the duct piece and the position parameters of the duct piece according to the trend of the interval curve, and respectively determining the size parameters of each upward block of the calibration ring and the wedge-shaped ring;
step 3, pre-typesetting is carried out according to the interval curve trend, and the radius R of the circular curve of the construction area and the radius L of the fitting circle are obtained; calculating the wedge quantity parameter K1R/L to obtain a wedge amount Z of K1(R + R), wherein R is the outer diameter of the standard pipe; calculating to obtain the total number of the required wedge-shaped rings
Wherein H is the ring width of the standard ring;
step 4, reasonably sequencing the segment blocks to be used according to the splicing requirement of the lining rings, the segment block stacking number and the limitation of the site construction area in the pre-typesetting result, determining an entrance sequence and an entrance and exit passage, and correspondingly marking the associated segment blocks;
step 5, assembling and configuring special duct pieces; the special pipe piece is a pipe piece positioned at the intersection point of the construction channel and the contact or positioned on the penetration path; for a special duct piece, a mode of splicing and combining a plurality of lining circular through seams is adopted, secondary grouting plugging is performed on a plurality of circular pieces on two sides of the special duct piece in advance, and a rigid support is arranged in an installation area of the special duct piece;
step 6, assembling and configuring negative ring duct pieces; the device comprises a steel support structure for positioning, which is configured and fixed in advance, wherein the steel support structure is at least arranged at two ends of each standard block at the bottom of a negative ring duct piece, and reasonable welding and fixing points are arranged according to the breaking and dismantling direction of a support after the negative ring duct piece is installed.
In step 2, the position parameters and the size parameters at least include: the construction section curve radius, the duct piece width and the ratio of the standard lining ring to the wedge-shaped lining ring; and for the double-faced wedge-shaped area, symmetrically arranging wedge-shaped quantities on two sides of the lining ring, wherein the wedge-shaped quantity alpha and the corresponding wedge-shaped angle beta are determined according to the minimum value of the construction section labyrinth diameter.
The further improvement of the segment lofting and steel plate installation process is that if the design of the width of the fixing ring is adopted for the turning part of the construction road section, the proper position of the positioning block is determined according to the segment changing installation requirement in different turning directions.
In step 3, in the specific implementation process, the trend and the numerical ratio obtained by calculation may not be an integer, but the lining ring is an inseparable whole, so that when the calculation result contains a decimal number, the number of wedge replacements is increased and the number of standard rings is reduced, so as to facilitate better fitting and splicing.
In step 6, firstly, a standard block positioned at the lowest part is installed, the precision requirements of the center line and the channel plumb line after the standard block is installed are ensured, then, the standard blocks at the left and right sides are assembled, the circumferential connecting bolt is immediately fastened when one duct piece is installed, and after the duct piece is installed in place, an extrusion or supporting structure is also configured as required to maintain the posture of the duct piece; and then, splicing the adjacent left and right blocks at one time, and finally installing the top block.
The further improvement to the aforementioned segment lofting and steel plate installation process is that corresponding positioning supports should also be provided for the negative ring segment located at the foremost side or the outermost side.
Detailed Description
The present application will be described in detail with reference to specific examples.
The application provides a section of jurisdiction lofting and steel sheet mounting process, mainly used subway tunnel construction and maintenance operation in-process, it includes following basic step:
step 1, selecting a proper standard ring and a lining ring according to deflection and deviation rectification requirements of a construction path, wherein the lining ring is described by a wedge-shaped ring in the embodiment;
step 2, determining the width of the duct piece and the position parameters of the duct piece according to the trend of the interval curve, respectively determining the size parameters of each upward block of the calibration ring and the wedge-shaped ring,
the position parameters and the size parameters at least comprise: the construction section curve radius, the duct piece width and the ratio of the standard lining ring to the wedge-shaped lining ring; for the double-faced wedge-shaped area, symmetrically arranging wedge-shaped quantities on two sides of the lining ring, wherein the wedge-shaped quantity alpha and the corresponding wedge-shaped angle beta are determined according to the minimum value of the construction section labyrinth path;
for the turning part of the construction road section, if the design of the width of the fixing ring is adopted, the proper position of the positioning block should be determined according to the mounting requirement of the film changing piece in different turning directions.
Step 3, pre-typesetting is carried out according to the interval curve trend
According to the radius R of the circular curve of the construction area and the radius L of the fitting circle; calculating the wedge quantity parameter K1R/L to obtain a wedge amount Z of K1(R + R), wherein R is the outer diameter of the standard pipe; calculating to obtain the total number of the required wedge-shaped rings
Wherein H is the ring width of the standard ring;
particularly, in the specific implementation process, because the trend and the numerical ratio obtained by calculation are not integers, but the lining ring is an integral which cannot be split, when the calculation result contains decimal, the number of wedge switches is increased and the number of standard rings is reduced, so that better fitting splicing is facilitated;
step 4, reasonably sequencing the segment blocks to be used according to the splicing requirement of the lining rings, the segment block stacking number and the limitation of the site construction area in the pre-typesetting result, determining an entrance sequence and an entrance and exit passage, and correspondingly marking the associated segment blocks;
step 5, assembling and configuring special duct pieces; the special pipe piece is a pipe piece positioned at the intersection point of the construction channel and the contact or positioned on the penetration path; for a special duct piece, a mode of splicing and combining a plurality of lining circular through seams is adopted, secondary grouting plugging is performed on a plurality of circular pieces on two sides of the special duct piece in advance, and a rigid support is arranged in an installation area of the special duct piece;
step 6, assembling and configuring negative ring duct pieces; the method comprises the steps that a fixed steel support structure for positioning is configured in advance, the steel support structure is at least arranged at two ends of each standard block at the bottom of a negative ring duct piece, and reasonable welding and fixing points are arranged according to the breaking and dismantling direction of a support after the negative ring duct piece is installed;
firstly, a standard block at the lowest part is installed, the precision requirements of a center line and a channel plumb line after the standard block is installed are ensured, then the standard blocks at the left and right sides are assembled, a ring-shaped connecting bolt is fastened immediately when each duct piece is installed, and after the duct pieces are installed in place, an extrusion or supporting structure is configured as required to maintain the posture of the duct pieces; splicing the adjacent left and right blocks at one time, and finally installing a top block; in particular, for the negative ring segment located at the most front side or the most outer side, a corresponding positioning support should be provided.
Although the present application has been described in detail with reference to preferred embodiments, those skilled in the art will understand that various modifications and equivalent arrangements can be made without departing from the spirit and scope of the present application.
Claims (6)
1. The tube sheet lofting and steel plate installation process is characterized by comprising the following steps of:
step 1, selecting proper standard rings and lining rings according to deflection and deviation rectifying requirements of a construction path;
step 2, determining the width of the duct piece and the position parameters of the duct piece according to the trend of the interval curve, and respectively determining the size parameters of each upward block of the calibration ring and the wedge-shaped ring;
step 3, pre-typesetting is carried out according to the interval curve trend, and the radius R of the circular curve of the construction area and the radius L of the fitting circle are obtained; calculating the wedge quantity parameter K1R/L to obtain a wedge amount Z of K1(R + R), wherein R is the outer diameter of the standard pipe; calculating to obtain the total number of the required wedge-shaped rings
Wherein H is the ring width of the standard ring;
step 4, reasonably sequencing the segment blocks to be used according to the splicing requirement of the lining rings, the segment block stacking number and the limitation of the site construction area in the pre-typesetting result, determining an entrance sequence and an entrance and exit passage, and correspondingly marking the associated segment blocks;
step 5, assembling and configuring special duct pieces; the special pipe piece is a pipe piece positioned at the intersection point of the construction channel and the contact or positioned on the penetration path; for a special duct piece, a mode of splicing and combining a plurality of lining circular through seams is adopted, secondary grouting plugging is performed on a plurality of circular pieces on two sides of the special duct piece in advance, and a rigid support is arranged in an installation area of the special duct piece;
step 6, assembling and configuring negative ring duct pieces; the device comprises a steel support structure for positioning, which is configured and fixed in advance, wherein the steel support structure is at least arranged at two ends of each standard block at the bottom of a negative ring duct piece, and reasonable welding and fixing points are arranged according to the breaking and dismantling direction of a support after the negative ring duct piece is installed.
2. The process of claim 1, wherein in the step 2, the position parameters and the size parameters at least comprise: the construction section curve radius, the duct piece width and the ratio of the standard lining ring to the wedge-shaped lining ring; and for the double-faced wedge-shaped area, symmetrically arranging wedge-shaped quantities on two sides of the lining ring, wherein the wedge-shaped quantity alpha and the corresponding wedge-shaped angle beta are determined according to the minimum value of the construction section labyrinth diameter.
3. The tube sheet lofting and steel plate installation process according to claim 2, wherein for a turning part of a construction road section, if a fixing ring width design is adopted, in different turning directions, an appropriate positioning block point position should be determined according to a sheet changing installation requirement.
4. The process of claim 1, wherein in step 3, when the calculation result contains decimal, the number of wedge exchanges is increased and the number of standard rings is decreased.
5. The pipe piece lofting and steel plate installation process according to claim 1, wherein in the step 6, a standard block located at the lowest part is installed firstly, the precision requirements of a center line and a channel plumb line after the standard block is installed are ensured, then the standard blocks on the left and right sides are assembled, a circumferential connecting bolt is fastened immediately when each pipe piece is installed, and after the pipe pieces are installed in place, an extrusion or support structure is configured as required to maintain the posture of the pipe pieces; and then, splicing the adjacent left and right blocks at one time, and finally installing the top block.
6. The segment lofting and steel plate installation process of claim 5, wherein corresponding positioning supports are arranged on the most front or outermost negative ring segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011524145.3A CN112682064A (en) | 2020-12-22 | 2020-12-22 | Pipe piece lofting and steel plate installation process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011524145.3A CN112682064A (en) | 2020-12-22 | 2020-12-22 | Pipe piece lofting and steel plate installation process |
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| CN112682064A true CN112682064A (en) | 2021-04-20 |
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