CN114481854A - Method for anchoring prestressed pipeline construction by using light positioning bracket - Google Patents
Method for anchoring prestressed pipeline construction by using light positioning bracket Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000004873 anchoring Methods 0.000 title claims abstract description 30
- 238000009434 installation Methods 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims description 37
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 3
- 230000036571 hydration Effects 0.000 claims description 3
- 238000006703 hydration reaction Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000005204 segregation Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 230000002950 deficient Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The invention relates to a method for anchoring prestressed pipeline construction by using a light positioning bracket, which comprises the following specific steps: designing a construction scheme; standardized design of a positioning bracket; the positioning bracket consists of five parts, namely an embedded part, a bottom frame, a sheet frame, a transverse connecting rod and a U-shaped supporting plate; processing a positioning bracket; expanding foundation construction; the anchor backing plate of the anchor surface and the notch are positioned and installed; installing a positioning bracket; lofting, measuring and positioning installation of the prestressed pipeline; lengthening a prestressed pipeline; and (5) pouring concrete of the anchor block. The invention adopts the construction method of 'layered pouring, layered splicing of the positioning support and segmented lengthening of the prestressed pipeline' to integrally position and support the prestressed pipeline, completely avoids the high-altitude operation of splicing and positioning of the positioning support for anchoring the prestressed pipeline by controlling the length of the cantilever of the positioning support, and ensures the installation precision of the prestressed pipeline; the construction time of the whole overlapping of the positioning support is avoided, and the construction period is obviously shortened.
Description
Technical Field
The invention relates to the technical field of construction of large-span suspension bridges, in particular to a method for anchoring prestressed pipelines by using a light positioning support.
Background
The anchor is one of main stress structures of the suspension bridge, the overall safety, stability and durability of the bridge structure are directly influenced by the design and construction of the structure of the anchor, and the main cable transmits pulling force to the anchor body through the saddle-loosening cable and the prestressed cable guide pipe, so that the two ends of the main cable are restrained. The accurate positioning and installation of the prestressed cable guide pipe are key nodes of the construction of an anchoring system in the process of anchorage construction, so that the special design of the strength, the rigidity and the stability of the prestressed positioning support and the construction process is very important.
The commonly used method for anchoring prestressed pipeline construction mainly includes an integral type positioning support method and a sectional type positioning support method. The anchoring positioning support is poured in the anchorage together with an anchoring system, the one-time investment is realized, the higher the steel consumption for designing the anchoring positioning support is, the higher the material cost is, the problems of large steel consumption, large flexibility, large accumulated error, difficulty in adjusting the precision in the construction process and the like exist in the integral positioning support method, and the sectional positioning support method is mostly adopted at present. The patent with the publication number of CN109468954B discloses a construction method of an anchorage anchoring system, a mixed type support system formed by concrete steps and profile steel supports improves the installation precision and reduces the consumption of steel, but anchor block concrete step type construction increases the side form mounting and dismounting work and the concrete side surface treatment work. Therefore, in the invention patent with application number 202110532479.3, the company proposes a positioning device and discloses a construction method thereof, which improves the installation efficiency, but the company is only directed to the construction method of the positioning device and does not give an overall construction operation method.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a method for anchoring prestressed pipeline construction by using a light positioning bracket.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for anchoring prestressed pipeline construction by using a light positioning bracket comprises the following specific steps:
s1 construction scheme design
On the basis of a general route of layered construction, the influence of concrete hydration heat, the integral stability of a positioning support and the length of a prestressed pipeline on the construction of an anchorage is comprehensively considered, the pouring thickness of each layer of concrete is between 1.5m and 2.5m, the positioning support is erected by adopting a cantilever and divided into three layers, and each prestressed pipeline is combined with the positioning support and divided into three sections;
s2 standardized design of positioning bracket
In order to meet the requirements of setting up positioning supports section by section and ensuring the positioning precision of the layered construction process of the prestressed pipeline, the positioning supports for anchoring the prestressed pipeline are designed in a standardized way, so that the positioning supports have enough strength and rigidity to ensure that the deformation of external loads generated by the construction process on the positioning supports is controlled within a reasonable range;
the positioning bracket consists of five parts, namely an embedded part, a bottom frame, a sheet frame, a transverse connecting rod and a U-shaped supporting plate;
s3, processing positioning bracket
The positioning support is a key part for ensuring accurate positioning of the prestressed pipeline, profile with defects is corrected or replaced in time during processing, a forming die is manufactured before assembling and welding, the processing quality is ensured to meet the requirements of design and installation accuracy, finally welding and post-welding inspection work is done according to the welding process of the design requirement, and forming rechecking, pre-assembling, acceptance inspection and storage are carried out in time after the manufacturing is finished;
s4 expanding foundation construction
Firstly constructing an enlarged foundation according to a design drawing and a construction scheme, wherein in view of the design requirements of the construction scheme, a rear anchor face support is erected on a stepped table top of a rear anchor block before the rear anchor face of the anchor block is constructed, the rear anchor block is constructed preferentially relative to the anchor block, and when the anchor block is constructed to the position of an embedded part of a first-layer chassis, lofting and embedding are carried out on the designed embedded part according to the construction scheme;
s5, anchor plate of anchor surface and notch positioning installation
The method comprises the following steps that (1) an anchor backing plate and a notch template are fixed together by bolts in advance before a rear anchor face anchor head is positioned, the notch template is placed in place according to the position of an anchor point determined on the rear anchor face template, a notch is adjusted, the notch template is fixed on the template by iron nails after the verticality between the bottom surface of the notch and a prestressed pipeline is measured to be qualified, then a spiral rib is sleeved on the notch template, the prestressed pipeline is inserted into the anchor head, and a joint is sealed;
s6, mounting of positioning bracket
Installing a positioning support after concrete on a layer where the embedded part is located reaches design strength, adjusting vertical and longitudinal verticality of a bottom frame and welding the bottom frame with the embedded part, adopting channel steel for transverse connection between the bottom frames, designing a sheet frame for overlapping standard sections according to a construction scheme after the bottom frames are stably connected, firstly adopting bolt connection between the bottom frames and the sheet frame for convenient adjustment, adjusting according to a design angle and an axis, welding, adopting channel steel for transverse connection between the sheet frames and using the sheet frame as a supporting member of a prestressed pipeline, welding and connecting a transverse connecting rod with the sheet frame according to a design position, and setting a cantilever of the sheet frame not more than three times of the design length of the sheet frame when a cantilever of the sheet frame is set up;
s7, lofting, measuring, positioning and installing prestressed pipelines
Roughly positioning the three-dimensional coordinates of the prestressed pipeline and the transverse connecting rod according to a design drawing, accurately positioning by adopting a total station three-dimensional coordinate method, welding a steel U-shaped supporting plate matched with the outer diameter of the prestressed pipeline and the prestressed pipeline, and welding and fixing the U-shaped supporting plate and the transverse connecting rod after the prestressed pipeline meets the requirements of design and standard specifications;
s8 lengthening prestressed pipeline
The prestressed pipelines are connected by adopting connector pipes with the diameter being 5mm larger than the outer diameter of the prestressed pipelines in a welding way, and the length of the connector pipes is more than twice the diameter of the prestressed pipelines;
s9 concrete pouring of anchor block
And (3) the concrete is vibrated by adopting a high-frequency plug-in vibrator, the plugging speed and the vibrating range of the vibrator during vibrating are controlled, and when the concrete curing time and the concrete curing strength meet the design requirements, the working steps S5-S9 are repeated until the construction of the anchor body is finished.
The sheet frame is a frame-shaped structure consisting of chord members and vertical members, an inclined rod is arranged in the middle of the frame-shaped structure, and the size of the sheet frame is 3m multiplied by 3 m.
In step S3, the embedded parts are formed by welding steel plates and steel bars, and the underframe and the sheet frame are formed by welding channel steel.
In step S8, during construction, the weld between the joint pipe and the prestressed pipe segment is strictly checked to ensure the welding quality and the thickness of the weld, and to avoid slurry leakage.
In step S9, the concrete is produced by a mixing plant, and when the concrete is poured into the form, the impact between the construction machine and the positioning bracket should be avoided when the pouring height is controlled to prevent segregation.
In step S9, according to the requirements of design drawings and standard specifications on temperature control, in order to prevent anchor concrete from cracking, the overall quality of the anchor is further improved, and partition and layered pouring is adopted by combining the structural characteristics of the anchor.
The invention has the beneficial effects that: the invention adopts the construction methods of layered pouring, layered splicing of the positioning support and segmented lengthening of the prestressed pipeline to integrally position and support the prestressed pipeline, and completely avoids the overhead operation of splicing and positioning the positioning support for anchoring the prestressed pipeline by controlling the length of the cantilever of the positioning support; meanwhile, the mounting precision of the prestressed pipeline is ensured, and the steel consumption of the positioning bracket is saved by at least 40%; the lapping of the positioning support and the positioning of the prestressed pipeline can be carried out before the lower-layer concrete reaches the continuous pouring strength, the construction time of the integral lapping of the positioning support is avoided, and the construction period is obviously shortened.
Drawings
FIG. 1 is a schematic view of the overall structure of the prestressed pipe and positioning device of the anchoring system of the present invention;
FIG. 2 is a schematic view of layered construction of a prestressed pipe before construction of a positioning bracket;
FIG. 3 is a schematic diagram of the positioning bracket overlapping and concrete layered pouring construction of a first prestressed pipeline;
FIG. 4 is a schematic diagram of the positioning bracket overlapping and concrete layered pouring construction of a second prestressed pipeline;
FIG. 5 is a schematic view of the third prestressed pipe positioning bracket overlapping and concrete layered pouring construction;
FIG. 6 is a schematic view of the fourth prestressed pipe positioning bracket overlapping and concrete layered pouring construction;
FIG. 7 is a schematic view of the arrangement of the prestressed pipe and the positioning bracket;
FIG. 8 is a plan view of a standard section of a sheet holder of the positioning bracket;
FIG. 9 is a schematic view of the connection of the pre-stressed conduit to the connecting rod;
FIG. 10 is a schematic view of a pre-stressed conduit joint;
in the figure: 1-expanding the basis; 2-rear anchor block; 3-rear anchor face support; 4-an anchor block; 5-positioning the bracket; 6-prestressed pipe;
501-embedded parts; 502-chassis; 503-a rack; 5031-chord; 5032-vertical bar; 5033-oblique rod; 504-transverse connecting rods; 505-U shaped pallet;
601-a prestressed pipe section; 602-a junction tube;
the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 to 10, a method for anchoring prestressed pipe construction using a light positioning bracket includes the following steps:
s1 construction scheme design
On the basis of a general route of layered construction, the influence of concrete hydration heat, the overall stability of the positioning support 5 and the length of the prestressed pipeline 6 on the construction of the anchorage is comprehensively considered, the casting thickness of each layer of concrete is between 1.5m and 2.5m, the positioning support 5 is erected by adopting a cantilever and divided into three layers, and each prestressed pipeline 6 is combined with the positioning support 5 and divided into three sections;
s2 standardized design of positioning bracket 5
In order to meet the requirements that the positioning supports 5 are erected section by section and the positioning precision of the layered construction process of the prestressed pipeline 6 is ensured, the positioning supports 5 for anchoring the prestressed pipeline 6 are designed in a standardized mode, so that the positioning supports 5 have enough strength and rigidity to ensure that the deformation of the positioning supports 5 caused by external loads in the construction process is controlled within a reasonable range;
the positioning bracket 5 consists of five parts, namely an embedded part 501, a bottom frame 502, a sheet frame 503, a transverse connecting rod 504 and a U-shaped supporting plate 505;
s3, processing of positioning bracket 5
The positioning support 5 is a key part for ensuring the accurate positioning of the prestressed pipeline 6, when in processing, a defective section bar is corrected or replaced in time, a forming die is manufactured before assembling and welding, the processing quality is ensured to meet the requirements of design and installation precision, finally, welding and post-welding inspection work is done according to the welding process of the design requirement, and after the manufacturing is finished, forming rechecking, pre-assembling, checking and storing are carried out in time;
s4 construction of enlarged foundation 1
Firstly constructing an enlarged foundation 1 according to a design drawing and a construction scheme, in view of the design requirements of the construction scheme, erecting a rear anchor face support 3 on a stepped table top of a rear anchor block 2 before constructing a rear anchor face of the anchor block 4, preferentially constructing the rear anchor block 2 relative to the anchor block 4, and lofting and embedding the designed embedded part 501 according to the construction scheme when the anchor block 4 is constructed to the embedded part 501 position of a first-layer underframe 502;
s5, anchor plate of anchor surface and notch positioning installation
The anchor backing plate and the notch template are fixed together by bolts in advance before the rear anchor face anchor head is positioned, the notch template is placed in place according to the position of an anchor point determined on the rear anchor face template, the notch is adjusted, the notch template is fixed on the template by iron nails after the verticality between the bottom surface of the notch and the prestressed pipe 6 is measured to be qualified, then the spiral rib is sleeved, the prestressed pipe 6 is inserted into the anchor head, and the joint is sealed;
s6, installing the positioning bracket 5
After the concrete on the layer where the embedded part 501 is located reaches the design strength, installing a positioning support 5, adjusting the vertical and longitudinal verticality of the underframe 502 and welding the underframe 501, adopting channel steel for transverse connection between the underframe 502, designing a sheet frame 503 for overlapping standard sections according to a construction scheme after the underframe 502 is stably connected, firstly adopting bolt connection between the underframe 502 and the sheet frame 503 for convenient adjustment, welding the underframe according to the design angle and the axis, adopting channel steel for transverse connection between the sheet frames 503 and using the channel steel as a supporting member of the prestressed pipeline 6, welding the transverse connecting rod 504 and the sheet frame 503 according to the design position, and when the cantilever of the sheet frame 503 is erected, the cantilever length is not more than three times of the design length of the sheet frame 503;
s7, lofting, measuring and positioning installation of prestressed pipeline 6
Roughly positioning the three-dimensional coordinates of the prestressed pipeline 6 and the transverse connecting rod 504 according to a design drawing, accurately positioning by adopting a total station three-dimensional coordinate method, welding a steel U-shaped supporting plate 505 matched with the outer diameter of the prestressed pipeline 6 with the prestressed pipeline 6, and welding and fixing the U-shaped supporting plate 505 and the transverse connecting rod 504 after the prestressed pipeline 6 meets the requirements of design and standard specifications;
s8 lengthening prestressed pipeline 6
The prestressed pipelines 6 are connected by welding through joint pipes 602 with the diameter being 5mm larger than the outer diameter of the prestressed pipelines 6, and the length of the joint pipes 602 is more than twice the pipe diameter of the prestressed pipelines 6;
s9 concrete pouring of anchor block 4
And (3) the concrete is vibrated by adopting a high-frequency plug-in vibrator, the plugging speed and the vibrating range of the vibrator during vibrating are controlled, and when the concrete curing time and the concrete curing strength meet the design requirements, the working steps S5-S9 are repeated until the construction of the anchor body is finished.
The rack 503 is a frame structure composed of a chord 5031 and a vertical 5032, the middle of the frame structure is provided with an inclined rod 5033, and the size of the rack 503 is 3m × 3 m.
In step S3, the embedded part 501 is formed by welding steel plates and steel bars, and the underframe 502 and the sheet frame 503 are formed by welding channel steel.
In step S8, during construction, the weld between the joint pipe 602 and the prestressed pipe segment 601 is strictly checked to ensure the welding quality and the thickness of the weld, and to avoid slurry leakage.
In step S9, the concrete is produced by a mixing plant, and when the concrete is poured into the form, the impact between the construction machine and the positioning bracket should be avoided when the pouring height is controlled to prevent segregation.
In step S9, according to the requirements of design drawings and standard specifications on temperature control, in order to prevent anchor concrete from cracking, the overall quality of the anchor is further improved, and partition and layered pouring is adopted by combining the structural characteristics of the anchor.
According to the invention, through carrying out lightweight and standardized design on the positioning bracket 5 for anchoring the prestressed pipeline 6, the construction efficiency of the positioning bracket 5 for anchoring the prestressed pipeline 6 is effectively improved, and the hoisting and installation difficulty is reduced.
The construction method of the anchoring system has the advantages that the anchoring positioning bracket 5 is high in strength and good in overall stability, and the possibility that the prestressed pipeline 6 is easy to send deviation in the construction process can be effectively reduced.
The invention adopts the construction method of 'layered pouring, layered splicing of the positioning support 5 and segmented lengthening of the prestressed pipeline 6' to integrally position and support the prestressed pipeline 6, and completely avoids the aloft work of splicing and positioning the positioning support 5 for anchoring the prestressed pipeline 6 by controlling the length of the cantilever of the positioning support 5; meanwhile, the installation precision of the prestressed pipeline 6 is ensured, and the steel consumption of the positioning bracket 5 is saved by at least 40%; the lapping of the positioning support 5 and the positioning of the prestressed pipeline 6 can be carried out before the lower-layer concrete reaches the continuous pouring strength, so that the construction time of the integral lapping of the positioning support 5 is avoided, and the construction period is obviously shortened.
The invention has been described in connection with the accompanying drawings, it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, adaptations or uses of the invention, and all such modifications and variations are within the scope of the invention.
Claims (6)
1. A method for anchoring prestressed pipeline construction by using a light positioning bracket is characterized by comprising the following specific steps:
s1 construction scheme design
On the basis of a general route of layered construction, the influence of concrete hydration heat, the overall stability of the positioning support (5) and the length of the prestressed pipeline (6) on the construction of the anchorage is comprehensively considered, the pouring thickness of each layer of concrete is between 1.5m and 2.5m, the positioning support (5) is erected by adopting a cantilever and divided into three layers, and each prestressed pipeline (6) is combined with the positioning support (5) and divided into three sections;
s2 standardized design of positioning bracket (5)
In order to meet the requirements that the positioning supports (5) are erected section by section and the positioning precision of the layered construction process of the prestressed pipeline (6) is ensured, the positioning supports (5) for anchoring the prestressed pipeline (6) are designed in a standardized manner, so that the positioning supports have enough strength and rigidity to ensure that the deformation of the positioning supports (5) caused by external loads in the construction process is controlled within a reasonable range;
the positioning support (5) consists of five parts, namely an embedded part (501), a bottom frame (502), a sheet frame (503), a transverse connecting rod (504) and a U-shaped supporting plate (505);
s3, processing of a positioning bracket (5)
The positioning support (5) is a key part for ensuring the accurate positioning of the prestressed pipeline (6), when in processing, a defective section bar is corrected or replaced in time, a forming die is manufactured before assembling and welding, the processing quality is ensured to meet the requirements of design and installation precision, finally, welding and post-welding inspection work is done according to the welding process of the design requirement, and forming rechecking, pre-assembling, checking and storing are carried out in time after the manufacturing is finished;
s4 construction of enlarged foundation (1)
Firstly constructing an enlarged foundation (1) according to a design drawing and a construction scheme, wherein in view of the design requirement of the construction scheme, a rear anchor face support (3) is erected on a stepped table top of a rear anchor block (2) before the rear anchor face of the anchor block (4) is constructed, the rear anchor block (2) is constructed preferentially relative to the anchor block (4), and when the anchor block (4) is constructed to the position of an embedded part (501) of a first-layer underframe (502), the designed embedded part (501) is lofted and embedded according to the construction scheme;
s5, anchor plate of anchor surface and notch positioning installation
The anchor backing plate and the notch template are fixed together by bolts in advance before the rear anchor face anchor head is positioned, the notch template is placed in place according to the position of an anchor point on the rear anchor face template, the notch is adjusted, the notch template is fixed on the template by iron nails after the verticality between the bottom surface of the notch and the prestressed pipeline (6) is measured to be qualified, then the spiral rib is sleeved, the prestressed pipeline (6) is inserted into the anchor head, and the joint is sealed;
s6, mounting of positioning bracket (5)
After the concrete on the layer where the embedded part (501) is located reaches the design strength, installing a positioning support (5), adjusting the vertical and longitudinal verticality of the base frame (502) and welding with the embedded part (501), transversely connecting the base frames (502) by adopting channel steel, designing a sheet frame (503) for overlapping a standard section according to a construction scheme after the base frames (502) are stably connected, firstly connecting the base frame (502) and the sheet frame (503) by adopting bolts for adjustment, welding after adjusting according to a design angle and an axis, transversely connecting the sheet frames (503) by adopting the channel steel and using the channel steel as a supporting member of a prestressed pipeline (6), welding the transverse connecting rod (504) with the sheet frame (503) according to a design position, and setting a cantilever of the sheet frame (503) to ensure that the length of the cantilever is not more than three times of the design length of the sheet frame (503);
s7, lofting, measuring and positioning installation of prestressed pipeline (6)
Roughly positioning the three-dimensional coordinates of the prestressed pipeline (6) and the transverse connecting rod (504) according to a design drawing, accurately positioning by adopting a total station three-dimensional coordinate method, welding a steel U-shaped supporting plate (505) matched with the outer diameter of the prestressed pipeline (6) with the prestressed pipeline (6), and welding and fixing the U-shaped supporting plate (505) and the transverse connecting rod (504) after the prestressed pipeline (6) meets the requirements of design and standard specifications;
s8 lengthening prestressed pipeline (6)
The prestressed pipelines (6) are connected by welding joint pipes (602) with the diameter being 5mm larger than the outer diameter of the prestressed pipelines (6), and the length of the joint pipes (602) is more than twice the pipe diameter of the prestressed pipelines (6);
s9 concrete pouring of anchor block (4)
And (3) the concrete is vibrated by adopting a high-frequency plug-in vibrator, the plugging speed and the vibrating range of the vibrator during vibrating are controlled, and when the concrete curing time and the concrete curing strength meet the design requirements, the working steps S5-S9 are repeated until the construction of the anchor body is finished.
2. The method for anchoring prestressed pipe construction using light-weight positioning bracket as recited in claim 1, wherein the slab frame (503) is a frame structure consisting of chord member (5031) and vertical member (5032), and the middle part of the frame structure is provided with a diagonal member (5033), and the size of the slab frame (503) is 3m x 3 m.
3. The method for anchoring prestressed pipe construction using light-weight positioning bracket as recited in claim 2, wherein in step S3, the embedded parts (501) are welded by steel plates and steel bars, and the underframe (502) and the sheet frame (503) are welded by channel steel.
4. The method for anchoring prestressed pipe construction using light-weight positioning frame as recited in claim 3, wherein in step S8, the weld seam between the joint pipe (602) and the prestressed pipe section (601) is strictly checked to ensure the welding quality and the thickness of the weld seam and avoid slurry leakage.
5. The method for anchoring prestressed pipe construction using light-weight positioning frame as recited in claim 4, wherein in step S9, said concrete is produced by using mixing plant, and when said concrete is poured into said form, the impact between construction machine and positioning frame should be avoided when the pouring height is controlled by preventing segregation.
6. The method for anchoring the prestressed pipe construction using the light-weight positioning bracket as recited in claim 5, wherein in step S9, according to the design drawing and the requirements of the standard specification regarding temperature control, in order to prevent the concrete cracking of the anchor body and further improve the overall quality of the anchor body, the partition and layer casting are adopted in combination with the structural characteristics of the anchor body.
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