CN114232786A - Underground structure type steel concrete inclined column construction method - Google Patents
Underground structure type steel concrete inclined column construction method Download PDFInfo
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- CN114232786A CN114232786A CN202111658324.0A CN202111658324A CN114232786A CN 114232786 A CN114232786 A CN 114232786A CN 202111658324 A CN202111658324 A CN 202111658324A CN 114232786 A CN114232786 A CN 114232786A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 123
- 239000010959 steel Substances 0.000 title claims abstract description 123
- 239000004567 concrete Substances 0.000 title claims abstract description 54
- 238000010276 construction Methods 0.000 title claims abstract description 49
- 238000009434 installation Methods 0.000 claims abstract description 21
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 18
- 238000009415 formwork Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 8
- 238000007596 consolidation process Methods 0.000 claims description 6
- 238000007569 slipcasting Methods 0.000 claims description 6
- 238000013519 translation Methods 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
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- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 6
- 239000006247 magnetic powder Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 229910000746 Structural steel Inorganic materials 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 3
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/0007—Base structures; Cellars
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/142—Means in or on the elements for connecting same to handling apparatus
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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Abstract
The invention discloses a construction method of an underground structure section steel concrete inclined column, which relates to the technical field of section steel concrete construction, and comprises the following steps: s1: measurement positioning, S2: pretreatment, S3: installation of oblique column middle section steel, S4: mounting steel bars at the middle section of the inclined column, and S5: oblique column middle section template installation, S6: and pouring concrete in the middle section of the inclined column. The construction method is suitable for installing the steel reinforced concrete combined batter posts with different inclination angles, and particularly has universality for the steel reinforced concrete combined batter posts with more quantity and different inclination angles in large-scale underground structures.
Description
Technical Field
The invention belongs to the technical field of section steel concrete construction, and particularly relates to a construction method of an underground structure section steel concrete inclined column.
Background
Along with the high-quality development of social economy in China, the urban population is increased rapidly, so that the traffic jam in the urban core area is increasingly serious, and in order to meet the requirement of improving the traveling efficiency of people, a large-scale underground rail transit junction is constructed, more and more junctions with attractive appearance and large underground space use area appear like spring bamboo shoots after rain on the premise of meeting the functional requirement of the junction, since the century, the development of a steel-concrete structure in the construction field is rapid, the bearing capacity of a member is greatly improved due to the existence of profile steel, in the construction stage of a main body structure of the junction, a steel-concrete inclined column is often used as a bearing column so as to obtain larger use space and good vertical surface effect, however, the construction of the steel-concrete inclined column in the underground junction is relatively complex, and the problems of difficult installation of the profile steel, inexistent vibration of concrete pouring and the like are faced, the invention provides a construction method of an underground structural steel reinforced concrete inclined column, aiming at the problems of complex construction, difficult section steel installation, insufficient concrete pouring and vibrating, no universality of the construction method and the like in the construction of the underground structural steel reinforced concrete inclined column in the prior art.
Disclosure of Invention
The invention aims to provide a construction method of an underground structure type steel concrete inclined column aiming at the defects of the prior art. The invention is suitable for the steel reinforced concrete inclined columns with different inclination angles, in particular to an engineering with more inclined columns and higher requirements on the quality of the inclined columns in the construction of an underground junction main body structure;
in order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a construction method of an underground structure steel reinforced concrete batter post,
the method comprises the following steps:
s1: measuring and positioning
Establishing an integral model by utilizing three-dimensional modeling software REVIT, respectively selecting four point position coordinates corresponding to the end part of the upper reserved inclined column section steel and the end part of the lower reserved inclined column section steel, measuring the corresponding point position coordinates through a total station according to actual field, mutually checking the point position coordinates and the corresponding point position coordinates, and obtaining the height and the inclination angle of the inclined column middle section steel according to the measured coordinates after error is avoided and processing the inclined column middle section steel;
s2: pretreatment of
Before processing, 2cm reduced scale processing is carried out on the oblique column middle section profile steel, a temporary operation platform is set up, 2 lifting lugs are respectively welded on the north and south sides of the oblique column profile steel reserved at the upper part, and 4 lifting lugs are welded at the upper and lower ends of the north and south sides of the oblique column middle section profile steel;
s3: installation of profile steel at middle section of oblique column
Pulling and installing a 10t chain block, lifting the chain block in a translation manner by a 10t forklift, adopting a temporary hanging plate for temporary consolidation after the chain block is lifted in place, and welding the reserved inclined column profile steel at the upper part and the lower part with the inclined column middle section profile steel by full penetration welding;
s4: installation of steel bar at middle section of batter post
Cleaning sundries at construction positions during steel bar binding, checking construction elevation conditions, binding after measuring and placing the positions of the steel bars, adopting mortar cushion blocks or plastic clamp support pads with the same label for steel bar binding, arranging the support pads according to a determinant or a staggered mode, mechanically connecting the steel bars at the middle section of the oblique column with the reserved steel bars at the upper part and the lower part by using a steel bar connector, welding the middle part by adopting single-sided welding, staggering 50% of welding joints, and carrying out stirrup encryption at the welding positions with the interval of 50 mm;
s5: installation of intermediate section template of batter post
The batter post is designed as D phi 1600mm, and the panel adopts t1 phi 20mm thick design plank sheathing, adopts t2 phi 150mm adjustable steel band to consolidate, and first way is 100mm apart from ground, and the second is 400mm apart from ground, all reinforces according to 500mm more than all the other, can calculate according to different batter post height.
S6: concrete pouring of middle section of inclined column
Combine the design requirement, the batter post interlude adopts C60 self-compaction micro-expansion concrete, guarantees the self-compaction nature after the concrete income mould, seted up on the batter post and reserved the mouth, reserve the mouth and be used for pouring concrete, after the batter post interlude form removal, adopt plastic film to wrap up the concrete that has already been poured, regularly watering maintenance, the maintenance time must not be less than 14 days.
Optionally, in the step S2:
the temporary operation platform comprises an unloading platform and an inclined column middle section operation platform, the inclined column middle section operation platform is erected around an inclined column, and a steel scaffold plate is fully paved on the operation surface and used for welding upper reserved inclined column section steel and inclined column middle section steel.
Optionally, in the step S2:
the lifting lug needs to be subjected to strength checking calculation before welding, and the lifting safety is ensured.
Optionally, in the step S3:
the installation of the section steel of the middle section of the batter post comprises the following operations:
1) 4 hand-pulling hoists of 10t are arranged at the parts of the section steel at the middle section of the oblique column and the section steel reserved on the upper part of the oblique column, wherein the parts are respectively → phi ', phi → phi', phi 'and phi → phi', and are pulled and lifted;
2) adjusting the vertical position and the horizontal condition of the section steel at the middle section of the oblique column, and simultaneously performing matched translation to an installation position by using a 10t forklift;
3) after the surveyor rechecks the elevation and the angle of the middle section of the batter post, respectively welding temporary hanging plates with the thickness of 2cm on four side surfaces of east, west, south and north for temporary consolidation;
4) and removing the forklift, welding the welding line, and dismantling the chain block after the welding is finished.
Optionally, in the step S3:
and chiseling column head concrete at the position of the reserved oblique column at the upper part after the section steel at the middle section of the oblique column is welded.
Optionally, the weld joint needs to be detected after the oblique column section steel and the upper and lower reserved oblique column section steel are welded, and the ultrasonic flaw detector is used for detecting the weld joint.
Optionally, in the step S5:
when the formwork is installed, a circle of reinforcing steel bar is welded in the middle section of the batter post and used for positioning the hoop, and a concrete protective layer cushion block is bound outside the hoop.
Optionally, in the step S6:
concrete is put into from reservation mouth department, adopts the mode of layering pouring, pours the in-process and constantly strikes the template with the hammer, and the emergence of prevention honeycomb pitted skin twines the round PVC hose at the top, and rubber slip casting pipe or full section slip casting pipe are chooseed for use to the material, if batter post middle section concrete placement is not closely knit, then adopts the seat thick liquids to carry out secondary slip casting before the template is demolishd.
The invention has the beneficial effects
(1) In the construction method, the profile steel is hoisted in a mode of matching the forklift with the lifting lugs, so that the construction method has the advantages of being convenient to hoist, easy to obtain required machinery, capable of reducing construction time and the like, and meanwhile, the lifting lugs are subjected to strength checking calculation before welding, and hoisting safety is guaranteed.
(2) The construction method is suitable for installing the steel reinforced concrete combined batter posts with different inclination angles, and particularly has universality for the steel reinforced concrete combined batter posts with more quantity and different inclination angles in large-scale underground structures.
(3) According to the invention, the formwork is installed by adopting the bracket-shaped pouring opening, the bell mouth is arranged at the top of the formwork, so that concrete can be poured more conveniently, and the concrete layered pouring method is adopted, so that the compactness of the concrete can be better improved, the occurrence of cellular pitted surface can be prevented, and the quality of the inclined column concrete can be ensured.
Drawings
Fig. 1 is a schematic flow chart of a construction method according to an embodiment of the present invention.
FIG. 2 is a sectional steel installation view of the batter post construction method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1-2, the present invention provides a construction method of an underground structural steel reinforced concrete batter post, and before construction, the present invention also needs to perform the preliminary preparation work on the batter post, so as to make the construction method fully utilized and displayed, and achieve better construction effect, wherein the preparation work comprises the steps of
1) Technical preparation: the design drawing is familiar before construction, and the drawing is reviewed together with a steel structure manufacturer, the provided problems are confirmed with the design in time, a detailed construction technology is established, a technology bottom file is handed over to a technical group, a constructor, a quality worker, a construction team leader and an operator, and meanwhile, the technician needs to carry out technology bottom-hand over to the construction team according to the working procedures and operation key points before construction and strengthen guidance in the construction process;
2) material and machine preparation: a steel structure factory deepens drawings according to the number and size of the section steel, ensures that the drawing is fed back after deepening is correct, can be used for processing, stores the processed section steel in a classified mode, numbers the section steel, and gradually pulls the section steel into a construction site according to a construction plan to prepare resources such as a forklift, a crane, a steel wire rope and the like required by construction;
the construction method is implemented after the preparation work is finished, and the method comprises the following steps:
s1: measuring and positioning
Establishing an integral model by utilizing three-dimensional modeling software REVIT, respectively selecting four point position coordinates corresponding to the end part of the upper reserved inclined column section steel and the end part of the lower reserved inclined column section steel, measuring the corresponding point position coordinates through a total station according to actual field, mutually checking the point position coordinates and the corresponding point position coordinates, and obtaining the height and the inclination angle of the inclined column middle section steel according to the measured coordinates after error is avoided and processing the inclined column middle section steel;
s2: pretreatment of
2cm reduced scale processing is carried out on the profile steel at the middle section of the oblique column before processing, a temporary operation platform is set up, 2 lifting lugs are respectively welded at the north and south sides of the profile steel at the upper part, 4 lifting lugs are welded at the upper and lower ends of the north and south sides of the profile steel at the middle section of the oblique column, the lifting lugs need to be subjected to strength checking calculation before welding, the lifting safety is ensured, the temporary operation platform comprises a discharging platform and the operation platform at the middle section of the oblique column, the operation platform at the middle section of the oblique column is set up in a manner of surrounding the oblique column, and a steel scaffold plate is fully laid on the operation surface and used for welding the profile steel at the upper part, reserved for the oblique column, with the profile steel at the middle section of the oblique column;
s3: installation of profile steel at middle section of oblique column
Adopt 10t chain block to drag and draw the installation, 10t fork truck cooperation translation hoist and mount, hoist and mount adopt interim link plate to be used for the temporary consolidation after taking one's place, and upper and lower portion is reserved batter post shaped steel and is adopted full penetration welding with batter post interlude shaped steel, the installation of batter post interlude shaped steel includes following operation:
1) 4 hand-pulling hoists of 10t are arranged at the parts of the section steel at the middle section of the oblique column and the section steel reserved on the upper part of the oblique column, wherein the parts are respectively → phi ', phi → phi', phi 'and phi → phi', and are pulled and lifted;
2) adjusting the vertical position and the horizontal condition of the section steel at the middle section of the oblique column, and simultaneously performing matched translation to an installation position by using a 10t forklift;
3) after the surveyor rechecks the elevation and the angle of the middle section of the batter post, respectively welding temporary hanging plates with the thickness of 2cm on four side surfaces of east, west, south and north for temporary consolidation;
4) removing the forklift, welding the welding line, and dismantling the chain block after welding;
s4: installation of steel bar at middle section of batter post
Cleaning sundries at construction positions during steel bar binding, checking construction elevation conditions, binding after measuring and placing the positions of the steel bars, adopting mortar cushion blocks or plastic clamp support pads with the same label for steel bar binding, arranging the support pads according to a determinant or a staggered mode, mechanically connecting the steel bars at the middle section of the oblique column with the reserved steel bars at the upper part and the lower part by using a steel bar connector, welding the middle part by adopting single-sided welding, staggering 50% of welding joints, and carrying out stirrup encryption at the welding positions with the interval of 50 mm;
s5: installation of intermediate section template of batter post
The batter post is designed as D phi 1600mm, and the panel adopts t1 phi 20mm thick design plank sheathing, adopts t2 phi 150mm adjustable steel band to consolidate, and first way is 100mm apart from ground, and the second is 400mm apart from ground, all reinforces according to 500mm more than all the other, can calculate according to different batter post height.
S6: concrete pouring of middle section of inclined column
According to design requirements, C60 self-compacting micro-expansive concrete is adopted in the middle section of the batter post, so that the self-compacting performance of the concrete after the concrete is placed in a mold is guaranteed, a reserved opening is formed in the batter post and used for pouring concrete, after the mold is removed from the middle section of the batter post, the poured concrete is wrapped by a plastic film, watering and curing are carried out regularly, and the curing time is not less than 14 days;
preferably, in the step S3: and after the section steel at the middle section of the batter post is welded, chiseling the concrete at the column head at the position of the upper reserved batter post, before chiseling, snapping a line according to the standard of the lowest point of the concrete pouring height of the column head, cutting a cut according to the position of the snapping line by using a cutting machine, wherein the cut must be leveled, and then chiseling is performed after the cutting is finished, wherein the chiseling rate is required to be not lower than 75% of the area of the concrete section, and laitance and loose blocks cannot exist on the surface after chiseling. Entering the next procedure after the construction joint is chiseled and accepted;
preferably, after the section steel at the middle section of the oblique column and the reserved oblique column section steel at the upper part and the lower part are welded, the weld joint needs to be detected, an ultrasonic flaw detector is adopted for detecting the internal quality of the on-site weld joint, if a problem is found during appearance detection, magnetic powder flaw detection needs to be carried out, the magnetic powder flaw detection is carried out according to the requirements of 'weld joint nondestructive detection magnetic powder inspection' (GB/T26951) 2011) and 'weld joint nondestructive detection weld joint magnetic powder inspection acceptance grade' (GB/T26952 2011), and the magnetic powder flaw detection is carried out according to the acceptance level 2 times of the defect display;
preferably, in the step S5: when the formwork is installed, a circle of phi 14@1000 HRB400 steel bars are welded in the middle section of the inclined column to position the hoop, and a concrete protective layer cushion block is bound outside the hoop. The concrete pouring opening in the middle section of the inclined column is in a bracket form, the top of the template is provided with a bell mouth, the diameter of the template is enlarged by 20cm, and the top of the template is heightened by 30 cm. Adjusting the lower template to enable the top expanded end to be 20cm higher than the finished inclined column concrete surface of the top according to the height of the inclined column in the middle section;
preferably, in the step S6: placing concrete into the formwork from the reserved opening, adopting a layered pouring mode, enabling the thickness of each layer to be 50cm, continuously knocking the formwork by an iron hammer in the pouring process, preventing the occurrence of a honeycomb pitted surface, winding a circle of PVC (polyvinyl chloride) hose at the top, selecting a rubber grouting pipe or a full-section grouting pipe as a material, and adopting a base slurry for secondary grouting before the formwork is dismantled if the concrete pouring of the middle section of the inclined column is not compact;
in the construction method, the profile steel is hoisted in a mode of matching the forklift with the lifting lugs, so that the construction method has the advantages of being convenient to hoist, easy to obtain required machinery, capable of reducing construction time and the like, and meanwhile, the lifting lugs are subjected to strength checking calculation before welding, so that the hoisting safety is ensured;
the construction method is suitable for installing the steel reinforced concrete combined batter posts with different inclination angles, and particularly has universality on the steel reinforced concrete combined batter posts with more quantity and different inclination angles in large-scale underground structures;
according to the invention, the formwork is installed by adopting the bracket-shaped pouring opening, the bell mouth is arranged at the top of the formwork, so that concrete can be poured more conveniently, and the concrete layered pouring method is adopted, so that the compactness of the concrete can be better improved, the occurrence of cellular pitted surface can be prevented, and the quality of the inclined column concrete can be ensured.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A construction method of an underground structure steel reinforced concrete batter post is characterized in that,
the method comprises the following steps:
s1: measuring and positioning
Establishing an integral model by utilizing three-dimensional modeling software REVIT, respectively selecting four point position coordinates corresponding to the end part of the upper reserved inclined column section steel and the end part of the lower reserved inclined column section steel, measuring the corresponding point position coordinates through a total station according to actual field, mutually checking the point position coordinates and the corresponding point position coordinates, and obtaining the height and the inclination angle of the inclined column middle section steel according to the measured coordinates after error is avoided and processing the inclined column middle section steel;
s2: pretreatment of
Before processing, 2cm reduced scale processing is carried out on the oblique column middle section profile steel, a temporary operation platform is set up, 2 lifting lugs are respectively welded on the north and south sides of the oblique column profile steel reserved at the upper part, and 4 lifting lugs are welded at the upper and lower ends of the north and south sides of the oblique column middle section profile steel;
s3: installation of profile steel at middle section of oblique column
Pulling and installing a 10t chain block, lifting the chain block in a translation manner by a 10t forklift, adopting a temporary hanging plate for temporary consolidation after the chain block is lifted in place, and welding the reserved inclined column profile steel at the upper part and the lower part with the inclined column middle section profile steel by full penetration welding;
s4: installation of steel bar at middle section of batter post
Cleaning sundries at construction positions during steel bar binding, checking construction elevation conditions, binding after measuring and placing the positions of the steel bars, adopting mortar cushion blocks or plastic clamp support pads with the same label for steel bar binding, arranging the support pads according to a determinant or a staggered mode, mechanically connecting the steel bars at the middle section of the oblique column with the reserved steel bars at the upper part and the lower part by using a steel bar connector, welding the middle part by adopting single-sided welding, staggering 50% of welding joints, and carrying out stirrup encryption at the welding positions with the interval of 50 mm;
s5: installation of intermediate section template of batter post
The batter post is designed as D phi 1600mm, and the panel adopts t1 phi 20mm thick design plank sheathing, adopts t2 phi 150mm adjustable steel band to consolidate, and first way is 100mm apart from ground, and the second is 400mm apart from ground, all reinforces according to 500mm more than all the other, can calculate according to different batter post height.
S6: concrete pouring of middle section of inclined column
Combine the design requirement, the batter post interlude adopts C60 self-compaction micro-expansion concrete, guarantees the self-compaction nature after the concrete income mould, seted up on the batter post and reserved the mouth, reserve the mouth and be used for pouring concrete, after the batter post interlude form removal, adopt plastic film to wrap up the concrete that has already been poured, regularly watering maintenance, the maintenance time must not be less than 14 days.
2. The method of constructing an underground structure type steel reinforced concrete batter post according to claim 1,
in the step S2:
the temporary operation platform comprises an unloading platform and an inclined column middle section operation platform, the inclined column middle section operation platform is erected around an inclined column, and a steel scaffold plate is fully paved on the operation surface and used for welding upper reserved inclined column section steel and inclined column middle section steel.
3. The method of constructing an underground structure type steel reinforced concrete batter post according to claim 1,
in the step S2:
the lifting lug needs to be subjected to strength checking calculation before welding, and the lifting safety is ensured.
4. The method of constructing an underground structure type steel reinforced concrete batter post according to claim 1,
in the step S3:
the installation of the section steel of the middle section of the batter post comprises the following operations:
1) 4 hand-pulling hoists of 10t are arranged at the parts of the section steel at the middle section of the oblique column and the section steel reserved on the upper part of the oblique column, wherein the parts are respectively → phi ', phi → phi', phi 'and phi → phi', and are pulled and lifted;
2) adjusting the vertical position and the horizontal condition of the section steel at the middle section of the oblique column, and simultaneously performing matched translation to an installation position by using a 10t forklift;
3) after the surveyor rechecks the elevation and the angle of the middle section of the batter post, respectively welding temporary hanging plates with the thickness of 2cm on four side surfaces of east, west, south and north for temporary consolidation;
4) and removing the forklift, welding the welding line, and dismantling the chain block after the welding is finished.
5. The method of constructing an underground structure type steel reinforced concrete batter post according to claim 1,
in the step S3:
and chiseling column head concrete at the position of the reserved oblique column at the upper part after the section steel at the middle section of the oblique column is welded.
6. The method of constructing a underground structure section steel concrete batter post according to claim 2,
the welding seam is required to be detected after the oblique column middle section steel and the upper and lower reserved oblique column steel are welded, and the ultrasonic flaw detector is used for detecting the welding seam.
7. The method of constructing an underground structure type steel reinforced concrete batter post according to claim 1,
in the step S5:
when the formwork is installed, a circle of reinforcing steel bar is welded in the middle section of the batter post and used for positioning the hoop, and a concrete protective layer cushion block is bound outside the hoop.
8. The method of constructing an underground structure type steel reinforced concrete batter post according to claim 1,
in the step S6:
concrete is put into from reservation mouth department, adopts the mode of layering pouring, pours the in-process and constantly strikes the template with the hammer, and the emergence of prevention honeycomb pitted skin twines the round PVC hose at the top, and rubber slip casting pipe or full section slip casting pipe are chooseed for use to the material, if batter post middle section concrete placement is not closely knit, then adopts the seat thick liquids to carry out secondary slip casting before the template is demolishd.
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