CN111455837B - Thin-wall hollow pier pouring connection structure and construction method thereof - Google Patents
Thin-wall hollow pier pouring connection structure and construction method thereof Download PDFInfo
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- CN111455837B CN111455837B CN202010372615.2A CN202010372615A CN111455837B CN 111455837 B CN111455837 B CN 111455837B CN 202010372615 A CN202010372615 A CN 202010372615A CN 111455837 B CN111455837 B CN 111455837B
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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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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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
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Abstract
The invention discloses a thin-wall hollow pier pouring connection structure and a construction method thereof, wherein the connection structure comprises pier steel bars connected in segments, a lower frame body connected to the lower part of the pier steel bars, an upper frame body connected to the upper part of the pier steel bars, a group of formwork connected to the middle part of the pier steel bars, and a formwork connected to the outer side of the steel bars after the steel bars are bound; the template contains interior template and exterior sheathing, and the exterior sheathing outside is connected with landing slab and rail. According to the invention, through the arrangement of the upper frame body, the lower frame body and the positioning holes for positioning the pier steel bars on the upper frame body, the pier steel bars can be preliminarily laterally limited under the large frame; the pier steel bars can be accurately positioned by arranging the die frame, and the die frame can also be used as a construction platform, so that the operation of constructors is facilitated; the method of binding and positioning the pier steel bars of the segments outside the field is beneficial to staged construction, and improves the construction efficiency and the construction accuracy; through the platform board and the connecting component that set up, do benefit to the safe convenient construction that realizes constructor.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a thin-wall hollow pier pouring connection structure and a construction method thereof.
Background
In recent years, a large number of pouring and rollover construction methods for the large and large thin-wall hollow piers are adopted in highway construction, requirements on the steel bar spacing and the protective layer qualification rate of the thin-wall hollow piers are gradually strict, and the construction by adopting a traditional method cannot meet the requirements on the progress and quality. Therefore, the safety risk of the high-altitude thin-wall hollow pier construction operation is reduced, the construction control technical key points are mastered, the perception quality of the thin-wall hollow pier body concrete is ensured, the pier body reinforcing steel bar positioning precision and the protective layer qualification rate are improved, and the construction efficiency and the safety are improved, so that the method becomes an important research direction of the thin-wall hollow pier construction.
Disclosure of Invention
The invention provides a thin-wall hollow pier pouring connecting structure and a construction method thereof, which are used for solving the technical problems of accurate positioning of a thin-wall hollow pier steel bar top, guarantee of the thickness of a protective layer, improvement of segmental and rapid construction of pier steel bars, convenience and safety construction during template installation and concrete pouring and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a thin-wall hollow pier pouring connection structure comprises pier steel bars connected in segments, a lower frame body connected to the lower portions of the pier steel bars, an upper frame body connected to the upper portions of the pier steel bars, a group of formwork connected to the middle portions of the pier steel bars, and a formwork connected to the outer sides of the steel bars after the steel bars are bound;
the die frame comprises an edge die frame, a first side die frame, a middle die frame and a second side die frame which are mutually spliced; the edge formwork, the first side formwork, the middle formwork and the second side formwork are spliced corresponding to the shape of the thin-wall hollow pier and penetrate through the fixed pier steel bars;
the template contains interior template and exterior sheathing, and the exterior sheathing outside is connected with landing slab and rail.
Further, the lower frame body is a rectangular frame, and a lower frame fixing hole for positioning the outermost pier steel bar is formed in the lower frame body; the upper frame body comprises an upper outer frame body and an upper inner frame body which are both rectangular frames, an upper outer fixed hole for positioning the most outside pier steel bar is arranged on the upper outer frame body, and an upper inner fixed hole for positioning the most inside pier steel bar is arranged on the upper inner frame body.
Furthermore, the side formwork is arranged on two sides of the thin-wall hollow pier and comprises a side formwork body, side formwork vertical frames and side formwork horizontal frames which are connected to the side formwork body, side formwork reinforcing rods connected between the side formwork vertical frames and side formwork fixed holes which are arranged on the side formwork body and correspond to pier reinforcing steel bars; the side formwork body is also provided with a side formwork hanging plate for hoisting.
Furthermore, the first side formwork comprises a first side formwork plate body, a first side formwork vertical frame and a first side formwork horizontal frame which are connected to the first side formwork plate body, a first side formwork reinforcing rod connected between the first side formwork vertical frames, a first side formwork fixed hole which is arranged on the first side formwork plate body and corresponds to the pier steel bar, and a first side formwork hanging plate for hoisting which is connected to the first side formwork plate body; the inner side of the first side formwork body is provided with a trapezoidal notch corresponding to the thin-wall hollow pier.
Further, the second side formwork comprises a second side formwork plate body, a second side formwork vertical frame and a second side formwork transverse frame which are connected to the second side formwork plate body, a second side formwork reinforcing rod connected between the second side formwork vertical frames, a second side formwork fixed hole which is arranged on the second side formwork plate body and corresponds to the pier steel bar, and a second side formwork hanging plate for hoisting is connected to the second side formwork plate body; the inner side of the second side formwork plate body is provided with a trapezoidal notch corresponding to the thin-wall hollow pier, and the trapezoidal notch is opposite to the trapezoidal notch of the first side formwork plate body.
Furthermore, the middle die frame comprises a middle die plate body, a middle die vertical frame and a middle die transverse frame which are connected to the middle die plate body, a middle die reinforcing rod connected between the middle die vertical frames, and a middle die positioning hole which is arranged on the middle die plate body and corresponds to the pier steel bar; a middle mould hanging plate for hoisting is also connected to the middle mould plate body; the middle die frame and the side die frame are arranged in parallel, and the number of the middle die frame corresponds to the number of the pier holes of the thin-wall hollow piers.
Furthermore, the inner template and the outer template are connected through a split bolt, and the inner template is arranged in a wedge angle type installation; and the width of the face plate of the inner template and the face plate of the outer template is at least 1.5m for mold splitting.
Furthermore, back ridges are arranged on the outer side of the outer template at intervals, and the back ridges at the corners of the outer template are connected through corner connecting pieces; the outer side of the top of the outer template is also connected with a platform plate, and the width of the platform plate is adapted to the construction design width of an operator.
Furthermore, a railing is arranged on the outer side of the platform plate, and a fence is detachably connected to the outer side of the railing; the lower part of the platform plate is reinforced and connected by a truss consisting of vertical braces, inclined braces, cross bars and lower cross braces.
Further, the construction method of the thin-wall hollow pier pouring connection structure comprises the following specific steps:
firstly, manufacturing an upper frame body and a fixed hole therein, a lower frame body and a fixed hole therein according to the design position of pier steel bars and the thickness requirement of a protective layer, manufacturing a die carrier and determining the number of die carrier groups; the plate body strength in each component module of the formwork is suitable for bearing the strength required by the standing operation of constructors;
step two, positioning and binding pier steel bars of each section outside the field, correspondingly installing an upper outer frame body, an upper inner frame body, a lower frame body and a formwork, and connecting a threaded sleeve at the top of each pier steel bar
Step three, installing and binding pier steel bars, integrally hoisting, ensuring accurate positioning when the steel bars of the upper section and the lower section are mechanically connected, and ensuring the space between the steel bars and the qualified rate of the protective layer; after all the steel bars of the section are installed, removing the straight thread sleeves at the tops of the steel bars, and removing the upper frame body, the lower frame body and the die carrier for turnover use;
fourthly, installing an outer template and an inner template at the design positions of the pier steel bars after the hoisting and positioning are completed, installing inner template supports inside the inner template, and connecting the inner template and the outer template through split bolts; connecting back edges outside the outer template, and connecting the back edges at corners through corner connecting pieces;
step five, connecting a platform plate on the top of the outer side of the outer template or in the vertical direction at intervals, wherein the platform plate is used as a rotatable working platform, and the strength of the platform plate is suitable for constructors and mechanical application strength; the outer side of the platform plate is connected with a railing and a fence, and the lower part of the platform plate is stably connected through a support truss consisting of a cross rod, a lower cross brace, a vertical brace and an inclined brace; the platform boards are communicated with each other through the crawling ladder;
and sixthly, pouring concrete for the thin-wall hollow pier in the template, curing, and removing the template for construction in the next stage after the curing is qualified until the integral pouring of the thin-wall hollow pier is completed.
The invention has the beneficial effects that:
1) according to the invention, through the arrangement of the upper frame body, the lower frame body and the fixed holes for positioning the pier steel bars on the upper frame body, the pier steel bars can be preliminarily laterally limited under the large frame, further through the arrangement of the formwork, the pier steel bars can be accurately positioned, and each plate body in the formwork can also be used as a construction platform, so that the operation of constructors is facilitated;
2) the method is beneficial to staged construction by binding and positioning the pier steel bars of the segments outside the field, improves the construction efficiency, facilitates integral hoisting construction and improves the construction accuracy;
3) according to the invention, the platform plate and the connecting member are arranged outside the outer template, so that safe and convenient construction of constructors is facilitated, and the construction of the template and the construction of pier steel bars of the upper section are alternately carried out, so that the construction time can be saved; in addition, the inner template and the outer template are convenient to disassemble and assemble and can be repeatedly used;
in addition, each component of the pouring connecting structure is easy to manufacture on site and adapts to site condition construction, the construction method is convenient and safe, and the construction quality is high; additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.
Drawings
FIG. 1 is a schematic view of the structure of an upper frame body;
FIG. 2 is a schematic view of the lower frame structure;
FIG. 3 is a schematic view of the scaffold structure;
FIG. 4 is a schematic view of a side form construction;
FIG. 5 is a schematic view of a first side mold frame structure;
FIG. 6 is a schematic view of a middle mold frame structure;
FIG. 7 is a schematic view of a second mold frame structure;
FIG. 8 is a schematic view of the inner and outer forms and their connection structure;
fig. 9 is a schematic view of a platform board and its connection structure.
Reference numerals: 1-upper outer frame body, 2-upper outer fixed hole, 3-upper inner frame body, 4-upper inner fixed hole, 5-lower frame body, 6-lower fixed hole, 7-side frame body, 71-side frame body, 72-side mould vertical frame, 73-side mould horizontal frame, 74-side mould reinforcing rod, 75-side mould fixed hole, 76-side mould hanging plate, 8-first side frame body, 81-first side frame plate body, 82-first side mould vertical frame, 83-first side mould horizontal frame, 84-first side mould reinforcing rod, 85-first side mould fixed hole, 86-first side mould hanging plate, 9-middle frame body, 91-middle mould plate body, 92-middle mould vertical frame, 93-middle mould horizontal frame, 94-middle mould reinforcing rod, 95-middle mould fixed hole, 96-middle mould hanging plate, 10-a second side formwork, 101-a second side formwork plate body, 102-a second side formwork vertical frame, 103-a second side formwork transverse frame, 104-a second side formwork reinforcing rod, 105-a second side formwork fixed hole, 106-a second side formwork hanging plate, 11-an inner formwork, 12-an inner formwork support, 13-an outer formwork, 14-split bolts, 15-cross rods, 16-angle connecting pieces, 17-a platform plate, 18-railings, 19-a lower transverse support, 20-vertical supports, 21-diagonal supports and 22-back ridges.
Detailed Description
Taking a pouring structure of a certain double-hole thin-wall hollow pier as an example, the double holes are horizontally arranged in parallel and are rectangular in the same size, and four corners of the double holes are arc-shaped holes. The hole thin-wall hollow pier is cast in a height range which is divided into at least two sections for segmental installation. The thin-wall hollow pier pouring connecting structure comprises pier reinforcing steel bars connected by segments, a lower frame body 5 connected to the lower portion of the pier reinforcing steel bars, an upper frame body connected to the upper portion of the pier reinforcing steel bars, a group of formwork connected to the middle portions of the pier reinforcing steel bars, and a formwork connected to the outer sides of the reinforcing steel bars behind the binding of the reinforcing steel bars.
As shown in fig. 1 and 2, the lower frame 5 is a rectangular steel frame and is made of thick steel plates or angle steels, and the lower frame 5 is provided with lower frame fixing holes 6 for fixing outermost pier steel bars. During installation, the most lateral pier steel bars are inserted into the lower frame positioning holes 6, and the pier steel bars are connected with the lower frame body 5 through binding wires. Go up the support body and form through the preparation of steel plate, contain the last outer support body 1 and the last inner support body 3 that all are rectangular frame, go up and be provided with the last outer fixed orifices 2 of location outside mound reinforcing bar on the outer support body 1, go up and be provided with the last interior fixed orifices 4 of the most inboard mound reinforcing bar of location on the inner support body 3. During installation, pier steel bars are inserted into the upper outer fixed hole 2 and the upper inner fixed hole 4, and a pier main body is connected with the upper outer frame body 1 and the upper inner frame body 3 through binding wires.
As shown in fig. 3, the mold frame is made of steel, and includes a side mold frame 7, a first side mold frame 8, a middle mold frame 9, and a second side mold frame 10 that are spliced with each other; the edge die frame 7, the first side die frame 8, the middle die frame 9 and the second side die frame 10 are spliced corresponding to the shape of the thin-wall hollow pier and are all connected with fixed pier steel bars in a penetrating mode. The pier steel bars are accurately controlled by the positioning holes in the die frame to be in position, distance and quantity, and stirrups are bound between the upper positioning die frame and the lower positioning die frame, so that the distance between the steel bars is consistent, the butt joint precision of the sleeve is improved, and the distance between the hollow pier steel bars and the qualified rate of the protective layer are improved.
As shown in fig. 4, the side form frames 7 are disposed at both sides of the thin-walled hollow pier, and include a side form body 71 made of a steel plate, side form mullions 72 and side form transoms 73 connected to the side form body 71 and made of a section steel, side form stiffeners 74 connected between the side form mullions 72, and side form positioning holes 75 disposed on the side form body 71 and corresponding to pier steel bars; the side form body 71 is further provided with a side form hanger plate 76 for hanging.
In this embodiment, the side form mullion 72 and the side form transom 73 are welded rectangularly, the side form reinforcing rods 74 are two and welded with the side form mullion 72, and the side form mullion 72, the side form transom 73 and the side form reinforcing rods 74 are arranged to provide an attachment for the side form body 71 and increase the overall rigidity of the side form frame 7. Four side formwork hanging plates 76 are provided for the steel plates with hanging holes and are respectively welded on the side formwork vertical frames 72.
As shown in fig. 5, the first side formwork 8 includes a first side formwork plate 81 made of a steel plate, a first side formwork mullion 82 and a first side formwork transom 83 which are connected to the first side formwork plate 81 and made of section steel, a first side formwork stiffener 84 connected between the first side formwork mullions 82, a first side formwork fixed hole 85 corresponding to a pier steel bar and arranged on the first side formwork plate 81, and a first side formwork hanger plate 86 for hoisting connected to the first side formwork plate 81; the inner side of the first side formwork plate 81 is provided with a trapezoidal notch corresponding to the thin-wall hollow pier.
In this embodiment, the first side form mullion 82 and the first side form transom 83 are welded in a rectangular shape, the first side form stiffener 84 has two parts and is welded to the first side form mullion 82, and the first side form mullion 82, the first side form transom 83 and the first side form transom 83 are arranged to provide an attachment for the first side form frame plate 81 and increase the overall rigidity of the first side form frame 8. The number of the first side die hanging plates 86 is four, and the four steel plates are welded to the first side die mullion 82 respectively.
As shown in fig. 6, the middle mold frame 9 includes a middle mold plate body 91 made of a steel plate, middle mold mullions 92 and middle mold transoms 93 made of section steel connected to the middle mold plate body 91, middle mold reinforcing rods 94 connected between the middle mold mullions 92, and middle mold holes 95 disposed on the middle mold plate body 91 and corresponding to pier steel bars; a middle mold hanging plate 96 for hanging is also connected to the middle mold plate body 91; the middle die frame 9 and the side die frame 7 are arranged in parallel, and the number of the middle die frame 9 corresponds to the number of the thin-wall hollow pier holes.
In this embodiment, the middle mold mullion 92 and the middle mold transom 93 are welded in a rectangular shape, the middle mold reinforcing rods 94 are welded to the middle mold mullion 92, and the middle mold mullion 92, the middle mold transom 93 and the middle mold reinforcing rods 94 are arranged to provide attachment for the middle mold plate 91 and increase the overall rigidity of the middle mold frame 9. The middle mold hanging plates 96 are four steel plates with hanging holes, and are respectively welded on the middle mold vertical frame 92.
As shown in fig. 7, the second side formwork 10 includes a second side formwork plate 101 made of a steel plate, a second side formwork mullion 102 and a second side formwork transom 103 which are connected to the second side formwork plate 101 and made of section steel, a second side formwork stiffener 104 connected between the second side formwork mullions 102, a second side formwork fixed hole 105 which is arranged on the second side formwork plate 101 and corresponds to a pier steel bar, and a second side formwork hanger plate 106 for hoisting is further connected to the second side formwork plate 101; the inner side of the second side formwork plate body 101 is provided with a trapezoidal notch corresponding to the thin-wall hollow pier, and the trapezoidal notch is opposite to the trapezoidal notch of the first side formwork plate body 81.
In this embodiment, the second side form mullion 102 and the second side form transom 103 are welded in a rectangular shape, the second side form stiffener 104 has two parts and is welded to the second side form mullion 102, and the second side form mullion 102, the second side form transom 103 and the second side form transom 103 provide an attachment for the second side form frame plate 101, and increase the overall rigidity of the second side form frame 10. The second side formwork hanger plates 106 are four steel plates with hanger holes, and are welded to the second side formwork mullion 102 respectively.
As shown in fig. 8, the formwork includes an inner formwork 11 and an outer formwork 13, and the inner formwork 11 and the outer formwork 13 are steel formworks. The outer side of the outer template 13 is connected with a platform plate 17 and a fence. The inner template 11 and the outer template 13 are connected through split bolts 14, and the inner template 11 is arranged in a wedge angle type installation mode, so that the installation and the disassembly are convenient; the width of the panels of the inner template 11 and the outer template 13 is at least 1.5m, so that the influence on the appearance quality of the hollow pier concrete due to the splicing of the panels is reduced. The outer side of the outer template 13 is provided with back edges 22 at intervals, the back edges 22 at the corners of the outer template 13 are connected through corner connecting pieces 16, and the corner connecting pieces 16 are bolts.
As shown in fig. 9, the outer side of the top of the outer form 13 is further connected with a platform plate 17, and the width of the platform plate 17 is adapted to the construction design width of an operator. The platform board 17 outside is provided with railing 18, and what the connection can be dismantled in the railing 18 outside encloses the fender, encloses the iron plate that keeps off the material for the fretwork design, avoids bearing too big windage and increase daylighting, and red white paint is evenly applied paint with a brush to the outside. The lower part of the platform plate 17 is reinforced and connected by a truss consisting of vertical braces 20, inclined braces 21, cross bars 15 and lower cross braces 19.
With reference to fig. 1 to 9, a construction method of a thin-wall hollow pier pouring connection structure is further described, which comprises the following specific steps:
firstly, manufacturing an upper outer frame body 1, an upper inner frame body 3, an upper outer fixed hole 2, an upper inner fixed hole 4, a lower frame body 5 and a lower frame fixed hole 6 according to the design position of pier steel bars and the thickness requirement of a protective layer, manufacturing a die set and determining the number of die sets; the plate body strength in each module of the die carrier 9 is suitable for bearing the strength required by the standing operation of constructors.
And step two, positioning and binding pier steel bars of each section outside the field, correspondingly installing an upper outer frame body 1, an upper inner frame body 3, a lower frame body 5 and a die carrier, and connecting a threaded sleeve at the top of each pier steel bar.
Step three, installing and binding pier steel bars, integrally hoisting, ensuring accurate positioning when the steel bars of the upper section and the lower section are mechanically connected, and ensuring the space between the steel bars and the qualified rate of the protective layer; after all the steel bars of the section are installed, the straight thread sleeve at the top of the steel bar is removed, the upper frame body, the lower frame body 5 and the die carrier are removed for turnover use, and the potential safety hazard of hoisting construction one by one is avoided.
Fourthly, installing an outer template 13 and an inner template 11 at the pier steel bar design position of the lifted and positioned pier steel bar, installing an inner template support 12 inside the inner template 11, and connecting the inner template 11 and the outer template 13 through a split bolt 14; the back edges 22 are connected to the outside of the outer form 13 and the back edges 22 are connected at the corners by corner connectors 16.
In the embodiment, the center of the top of each pier body template is provided with a longitudinal axis and a transverse axis, and the center is marked with red paint. When the pier body template is installed, the bottom of the template is positioned according to the pier body side line arranged on the top surface of the tie beam. Before the templates are installed, the center of the top of each template is provided with a longitudinal axis and a transverse axis, and the center is marked with red paint. During the formwork installation, the bottom of the formwork is positioned according to the pier body side line arranged on the top surface of the tie beam, the top of the formwork is initially positioned by adopting a 5kg heavy plumbum hammer, and then the total station is used for accurately positioning by utilizing the sub-datum point arranged in the center of the top of the pier body formwork in advance. When the mounting height of the template is not more than 10m, adopting a method of hanging a plumb ball in two vertical directions of vertical and horizontal directions, at a position close to the template and at a position 5-6 m away from the template to carry out verticality observation, and adopting a jack to assist a thin steel sheet to carry out adjustment; and when the height exceeds 10m or the hanging ball is not easy to control, the total station is adopted for control.
In this embodiment, after the template is installed, the plane position, the top elevation, the node connection and the longitudinal and transverse stability of the template are checked, the concrete can be poured after the identification, and when the template is found to be possible to exceed the allowable deviation deformation value during pouring, the template should be corrected in time. And detecting the verticality of the template by using a total station instrument in the template installation process, and fixing the periphery of the template by using a guy cable. And after the templates are assembled, checking and adjusting the verticality, the plane size, the top elevation, the node connection and the longitudinal and transverse stability of the templates by using a total station, wherein the error is not more than 3 mm. And after the template is reinforced and qualified through self-inspection, concrete can be poured.
Step five, connecting a platform plate 17 at intervals on the top of the outer side of the outer template 13 or in the vertical direction, wherein the platform plate 17 is used as a rotatable working platform, and the strength of the working platform is suitable for constructors and mechanical application strength; the outer side of the platform plate 17 is connected with a railing 18 and a fence, and the lower part of the platform plate 17 is stably connected with a support truss consisting of a cross rod 15, a lower cross brace 19, a vertical brace 20 and an inclined brace 21; the platform plates 17 are communicated with each other through a ladder.
And sixthly, pouring concrete for the thin-wall hollow pier in the template, curing, and removing the template for construction in the next stage after the curing is qualified until the integral pouring of the thin-wall hollow pier is completed. Pouring segments, namely the single pouring height is considered every 4-5 m to meet the concrete construction requirement; the height of each section is controlled by ensuring that the height and the quantity of the templates and the corresponding attached weight are within the construction allowable range of the tower crane, and the removal and lifting height of the templates is not more than 5 m/time.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.
Claims (7)
1. The construction method of the thin-wall hollow pier pouring connection structure is characterized in that the connection structure comprises pier steel bars connected in a segmental manner, a lower frame body (5) connected to the lower parts of the pier steel bars, an upper frame body connected to the upper parts of the pier steel bars, a group of formwork connected to the middle parts of the pier steel bars, and a formwork connected to the outer sides of the steel bars after the steel bars are bound; the thin-wall hollow pier is cast in a height range which is at least divided into two sections;
the die frame comprises an edge die frame (7), a first side die frame (8), a middle die frame (9) and a second side die frame (10) which are spliced with each other; the edge die frame (7), the first side die frame (8), the middle die frame (9) and the second side die frame (10) are spliced corresponding to the shape of the thin-wall hollow pier and are all connected with fixed pier steel bars in a penetrating mode; the top of the pier steel bar is detachably connected with a threaded sleeve;
the template comprises an inner template (11) and an outer template (13), and the outer side of the outer template (13) is connected with a platform plate (17) and a fence; a railing (18) is arranged on the outer side of the platform plate (17), and a fence is detachably connected to the outer side of the railing (18); the lower part of the platform plate (17) is reinforced and connected by a truss consisting of vertical braces (20), inclined braces (21), cross bars (15) and lower cross braces (19);
the lower frame body (5) is a rectangular frame, and lower frame fixing holes (6) for positioning the outermost pier steel bars are formed in the lower frame body (5); the upper frame body comprises an upper outer frame body (1) and an upper inner frame body (3) which are both rectangular frames, an upper outer fixed hole (2) for positioning the most outside pier steel bar is arranged on the upper outer frame body (1), and an upper inner fixed hole (4) for positioning the most inside pier steel bar is arranged on the upper inner frame body (3);
back edges (22) are arranged on the outer side of the outer template (13) at intervals, and the back edges (22) at the corners of the outer template (13) are connected through corner connecting pieces (16); the outer side of the top of the outer template (13) is also connected with a platform plate (17);
the construction method for pouring the connecting structure by using the thin-wall hollow pier comprises the following specific steps:
firstly, manufacturing an upper frame body and a fixed hole therein, a lower frame body (5) and a fixed hole therein (6) according to the design position of pier steel bars and the thickness requirement of a protective layer, manufacturing a die carrier and determining the number of die carrier groups; the plate body strength in each component module of the die carrier (9) is suitable for bearing the strength required by the standing operation of constructors;
secondly, positioning and binding pier steel bars of each section outside the field, correspondingly installing an upper outer frame body, an upper inner frame body, a lower frame body (5) and a formwork, and connecting a threaded sleeve at the top of each pier steel bar;
step three, installing and binding pier steel bars, integrally hoisting, ensuring accurate positioning when the steel bars of the upper section and the lower section are mechanically connected, and ensuring the space between the steel bars and the qualified rate of the protective layer; after all the steel bars of the section are installed, removing the straight thread sleeves at the tops of the steel bars, and removing the upper frame body, the lower frame body (5) and the die carrier for turnover use;
fourthly, installing an outer template (13) and an inner template (11) at the pier steel bar design position and installing an inner template support (12) inside the inner template (11) for the lifted and positioned pier steel bar, wherein the inner template (11) is connected with the outer template (13) through a split bolt (14); the outer side of the outer template (13) is connected with a back edge (22), and the back edge (22) is connected at a corner through a corner connecting piece (16);
connecting platform plates (17) on the top of the outer side of the outer template (13) or in the vertical direction at intervals, wherein the platform plates (17) are used as a rotatable working platform, and the strength of the working platform is suitable for constructors and mechanical application strength; the outer side of the platform plate (17) is connected with a railing (18) and a fence, and the lower part of the platform plate (17) is stably connected with a support truss consisting of a cross rod (15), a lower cross brace (19), a vertical brace (20) and an inclined brace (21); the platform plates (17) are communicated with each other through a ladder;
and sixthly, pouring concrete for the thin-wall hollow pier in the template, curing, and removing the template for construction in the next stage after the curing is qualified until the integral pouring of the thin-wall hollow pier is completed.
2. The construction method of the thin-wall hollow pier pouring connection structure according to claim 1, wherein the side formwork (7) is arranged on two sides of the thin-wall hollow pier and comprises a side formwork body (71), side formwork mullions (72) and side formwork transoms (73) connected to the side formwork body (71), side formwork reinforcing rods (74) connected between the side formwork mullions (72), and side formwork positioning holes (75) arranged on the side formwork body (71) and corresponding to pier reinforcing steel bars; the side formwork body (71) is also provided with a side formwork hanging plate (76) for hoisting.
3. The construction method of the thin-wall hollow pier pouring connection structure according to claim 2, wherein the first side formwork (8) comprises a first side formwork plate body (81), a first side formwork vertical frame (82) and a first side formwork horizontal frame (83) which are connected to the first side formwork plate body (81), a first side formwork reinforcing rod (84) which is connected between the first side formwork vertical frames (82), a first side formwork fixed hole (85) which is arranged on the first side formwork plate body (81) and corresponds to pier steel bars, and a first side formwork hanging plate (86) which is used for hoisting and is connected to the first side formwork plate body (81); the inner side of the first side die carrier plate body (81) is provided with a trapezoidal notch corresponding to the thin-wall hollow pier.
4. The construction method of the thin-wall hollow pier pouring connection structure according to claim 3, wherein the second side formwork (10) comprises a second side formwork plate body (101), a second side formwork vertical frame (102) and a second side formwork horizontal frame (103) which are connected to the second side formwork plate body (101), a second side formwork reinforcing rod (104) which is connected between the second side formwork vertical frames (102), a second side formwork fixed hole (105) which is arranged on the second side formwork plate body (101) and corresponds to pier reinforcing steel bars, and a second side formwork hanging plate (106) which is used for hoisting and connected to the second side formwork plate body (101); the inner side of the second side formwork plate body (101) is provided with a trapezoidal notch corresponding to the thin-wall hollow pier, and the trapezoidal notch is opposite to the trapezoidal notch of the first side formwork plate body (81).
5. The construction method of the thin-wall hollow pier pouring connection structure according to claim 4, wherein the middle formwork (9) comprises a middle formwork body (91), a middle formwork mullion (92) and a middle formwork transom (93) connected to the middle formwork body (91), a middle formwork reinforcing rod (94) connected between the middle formwork mullions (92), and a middle formwork hole (95) arranged on the middle formwork body (91) and corresponding to pier steel bars; a middle mould hanging plate (96) for hanging is also connected to the middle mould plate body (91); the middle die frames (9) and the side die frames (7) are arranged in parallel, and the number of the middle die frames (9) corresponds to the number of the pier holes of the thin-wall hollow piers.
6. The construction method of the thin-wall hollow pier pouring connection structure is characterized in that the inner formwork (11) and the outer formwork (13) are connected through split bolts (14), and the inner formwork (11) is arranged in a wedge angle type installation mode; the panel width of the inner template (11) and the outer template (13) is at least 1.5m for mold splitting.
7. The construction method of the thin-wall hollow pier pouring connection structure is characterized in that the width of the platform plate (17) is adapted to the construction design width of an operator.
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| CN112681136A (en) * | 2020-12-15 | 2021-04-20 | 中国建筑第八工程局有限公司 | Support structure of hollow pier top template and construction method thereof |
| CN114086461B (en) * | 2021-12-10 | 2023-12-19 | 中铁四局集团有限公司 | Rapid construction method for high pier combined assembly type steel bar inner support by matching with turnover formwork method |
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