CN210797285U - Dual-purpose device used as pier column template and prestress support - Google Patents
Dual-purpose device used as pier column template and prestress support Download PDFInfo
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- CN210797285U CN210797285U CN201921284406.1U CN201921284406U CN210797285U CN 210797285 U CN210797285 U CN 210797285U CN 201921284406 U CN201921284406 U CN 201921284406U CN 210797285 U CN210797285 U CN 210797285U
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Abstract
The utility model discloses a double-purpose device that pier stud template and prestressing force supported, during the construction, assemble pier stud lower part template earlier, install the device to template upper portion again, pier stud lower part template all pours the template as the pier stud with the device steel template, pour pier stud concrete after the installation is accomplished, treat that the pier stud reaches the intensity of form removal after, only demolish the following template of staple bolt, later carry out assembling and erectting of bailey roof beam, set up the full hall support in distribution roof beam and upper portion and lay die block installation side form, then carry out the prestressing force to the finish rolling screw-thread steel and stretch out and draw. And then constructing a bent cap beam body, after maintenance is completed, sequentially removing the disc buckle bracket and the Bailey sheet, and finally releasing and tensioning the finish-rolled deformed steel bar to remove the dual-purpose device which is also used as a bent cap template and a prestressed support. The device not only serves as a template for pouring the pier stud, but also serves as a supporting device for pouring the upper bent cap, so that the construction process is simplified, the construction period is effectively shortened, foundation treatment is not needed, and the material and the construction space are saved.
Description
Technical Field
The utility model relates to a tall and big bent cap formula of encorbelmenting supports technical field, specifically is a construction method that is used for construction site limited, the tighter overpass bent cap prestressed support of time limit for a project.
Background
In recent years, with the vigorous development of rail transit construction, a large number of urban viaducts emerge in each large city. In the bridge construction at the present stage, the main method for constructing the cast-in-place beam is a full-hall red method, but due to the characteristics of a support method, the application range has certain limitation, and the method is not suitable for the conditions of higher pier body, large foundation treatment workload and the like, so that the method has important practical significance for the innovative design of the supporting device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a double-purpose device and construction method that pier stud template and prestressing force supported has been done concurrently, the utility model discloses can save construction material and construction period, simplify traditional construction process. The prestressed supporting dual-purpose device is used as a template for pouring the pier stud and a supporting device for pouring the upper cover beam, simplifies the construction process, effectively shortens the construction period, and saves materials and construction space.
The utility model discloses a technical scheme be a double-purpose device that holds as pier stud template and prestressing force concurrently, its characterized in that: the steel formwork comprises a steel formwork (1), brackets (2), reinforcing plates (3), vertical ribs (4), transverse ribs (5), an upper end pull rod (6), bolts (7), an upper end transverse rod (8), finish-rolled deformed steel bars (9) and groove steel plates (10). The steel formwork (1) is used as a formwork during pouring of the pier stud and also used as a prestress transmission device.
The bracket (2) is arranged in three rows in parallel along the longitudinal direction, and the bracket (2) is welded on the vertical rib (4) on the outer side of the steel template (1). The transverse rib (5) is embedded in the vertical rib (4) to provide a stress surface for the split bolt. The top of steel form (1) sets up horizontal pole (8) of twice perpendicular to support face, and both ends set up one pull rod (6) respectively around horizontal pole (8). Twelve pieces of finish rolling deformed steel bars (9) are penetrated on the surface of the support, eight pieces of finish rolling deformed steel bars (9) are penetrated on the side surface of the support, counter pulling is carried out, and the friction force is increased by adopting a prestress applying mode. Welding a bevel steel plate (10) of 200mm by 20mm on the surface of the position of each finish-rolled deformed steel bar (9); the outside of the finish-rolled deformed steel bar (9) is fixed by a bolt (7). The stress concentration part of the bracket (2) is welded and reinforced by a reinforcing plate (3).
The bracket (2) and the steel formwork vertical rib (4) are made of 20# I-steel.
The transverse ribs (5) and the transverse rods (8) are made of channel steel.
The utility model discloses a double as dual-purpose device of prestressing force support of pier stud template, the device both regard as the template that the pier stud was pour usefulness, and strutting arrangement when pouring as the upper cover beam again simplifies the construction process, the effectual construction period that has shortened, save material and construction space.
During construction, firstly assembling a pier column lower template, then installing the device on the upper portion of the template, using the pier column lower template and the device steel template as pier column pouring templates, pouring pier column concrete after installation is completed, only dismantling the templates below a hoop after the pier column reaches the template removal strength, then assembling and erecting the Bailey beams, erecting distribution beams and upper full supports, laying a bottom die installation side die, and then performing prestress tensioning on PBS1080 type finish rolling deformed steel bars. And then constructing a bent cap beam body, after maintenance is completed, sequentially removing the disc buckle bracket and the Bailey sheet, and finally releasing and tensioning the finish-rolled deformed steel bar to remove the dual-purpose device which is also used as a bent cap template and a prestressed support.
Drawings
FIG. 1 is a flow chart of the construction process.
Fig. 2 is a schematic structural view of the device.
Detailed Description
The present invention will be described in detail below with reference to examples.
As shown in fig. 1, a construction method of a dual-purpose device which is used as a pier stud template and a prestressed support, the method comprises the following steps:
s1, preparation for construction
The construction preparation comprises the work of site arrangement, measurement and setting-out mechanical equipment installation and debugging, personnel getting on the site, material purchase and storage and the like. And (4) according to the construction drawing and the related lead points, releasing a central line, a cross-center line, a central line and side lines of the left and right bridges, wherein the released central line and side lines are used for facilitating the determination of the plane position of the support system.
And S2, installing a dual-purpose device which is used as a pier stud template and a prestress support, and then hoisting the device to a specified position by using a crane. The steel template (1) of the device is connected with the template of the lower pier column and is used as a pier column pouring template together.
S3 casting pier column concrete
After the steel templates (1) are assembled, pouring pier column concrete, and only dismantling the steel templates (1) below the device after the concrete reaches the form removal strength.
S4 Bailey beam assembly
The Bailey beam to be installed is hoisted by a crane, placed behind the installed Bailey beam and aligned with the Bailey beam, and the pin bolt is inserted after the lower chord pin hole is aligned with the Bailey beam. The Bailey pieces are assembled in groups, one Bailey piece (two transverse rows) is assembled each time, and the Bailey pieces are connected by a flower stand. The total length of the Bailey beam for the middle cross beam is 27 m.
S5, erecting the Bailey beam
And (3) hoisting by using a crane in a manual matching manner, wherein the whole Bailey sheet is hoisted sequentially from south to north or from the south to the inside and the outside, and the installation of the whole span Bailey beam is finished by repeating the steps.
(1) Before the Bailey beam is installed, a safety pin is installed on the beam inserted with the bolt, and after the Bailey beam needing to be butted on the top surface of the steel support is butted, a worker ties a safety belt and installs the safety pin.
(2) And after the Bailey beam is installed, connecting the Bailey beam by using triangular iron at intervals of 9m in the transverse direction, wherein the connecting mode is single-side welding, and the full welding line is kept.
(3) The Bailey beams are staggered on the top surfaces of the steel supports and cannot be connected, double U-shaped ribs are required to be connected, the U-shaped ribs are directly welded on one side, and welding seams are full.
S6, erecting distribution beams and full framing
And erecting a distribution beam and a bracket according to the central line and the side line of the placed bridge. The whole full-hall bracket adopts a disk buckle type bracket with the specification of phi 48mm multiplied by 3.2m and a full-hall matrix type support method. The whole structure has a modulus of 60 multiplied by 60, the row spacing of the vertical rods in the transverse bridge direction is 0.6m, and the row spacing in the forward bridge direction is 0.6 m; the vertical step distance of the cross bar is 0.45m, and the bottom support and the top support are controlled within 30 cm.
S7, mounting bottom die and side die plate
According to the construction characteristics and difficulties of the cast-in-place beam of the engineering, a large-area steel die is adopted for a pier column, a panel is a 6mm steel plate, a transverse frame is a 12 x 150mm steel strip, a vertical frame is a 12 x 100mm steel strip, a main rib is a No. 10 channel steel, a template back edge is a No. 2 No. 18 channel steel, a lifting hook is a round steel with the diameter of 20 mm/a thick steel plate with the diameter of 16mm, and an integral processing mode is adopted; the middle cross beam and the upper cover beam template adopt shaped steel templates.
S8 stretching finish-rolled deformed steel bar
Twelve finish-rolled deformed steel bars with the diameter of 40mm are arranged on the surface of the support, eight finished deformed steel bars are arranged on the adjacent surfaces, two pull rods are arranged at the upper end of the device, and twenty finished-rolled deformed steel bars are arranged on the device. And tensioning by adopting special tensioning equipment, wherein the tensioning force of each finish rolling deformed steel bar is not less than 450 KN. The stretching sequence is symmetrically stretched from the middle to the edge and is divided into two stages.
I.e., 0 → 50% → 100%. And finally, tensioning the upper end pull rod. And after the unloading of all the pre-pressing loads is finished, releasing and tensioning the finish-rolled deformed steel bar.
S9 construction of bent cap beam body
And performing related construction operations such as reinforcement binding, concrete pouring, concrete curing, prestressed rib tensioning, grouting, anchor sealing and the like on the corresponding beam body according to the construction scheme of the middle cross beam.
S10, removing the disc buckle bracket
And after tensioning is finished, the bottom die and the side die are disassembled, the jacking supports are symmetrically unloaded in the transverse bridge direction and the longitudinal bridge direction step by step, and the full-space support is gradually disassembled. The construction requirements are as follows:
(1) when the frame is dismantled, an operation area is divided, a rope bound fence or a warning mark is arranged around the frame, and a special person is arranged on the ground to command the frame and forbid non-operation personnel to enter the frame.
(2) The worker at high place to remove the frame should wear the safety helmet and fasten the safety belt.
(3) The dismantling sequence is based on the principle of first assembling and then disassembling, then assembling and first disassembling, firstly disassembling the side formwork cross brace and the inclined brace, then sequentially carrying out the small cross bar, the large cross bar, the vertical bar and the like according to the principle of one-step cleaning, and strictly forbidding the simultaneous dismantling operation from top to bottom.
(4) The upright rod is disassembled by firstly holding the upright rod and then disassembling the last two buckles, and when the large mould rod, the diagonal brace and the scissor brace are disassembled, the middle buckle is firstly disassembled, then the middle is supported, and then the end buckle is disassembled.
(5) The cross bars should be removed with the layers, and before removal, temporary support posts are applied and then removed.
(6) When the device is disassembled, the device needs to be uniformly directed, responds up and down and coordinates actions, and when the knot related to the other device is unfastened, the device informs the other device to prevent falling.
(7) The disassembled materials are hung down by using a rod piece tied by a rope, are strictly forbidden to be thrown and are piled according to a specified place. The fasteners are detached along with transportation, sorted and stacked, and detached on the same day and cleaned on the same day, and the detached fasteners are collected and recycled.
(8) In the process of dismantling the rack, people must be changed in the middle, and if people must be changed, the dismantling condition needs to be left clear.
S11, detaching the Bailey sheet and the cover device
(1) And (4) the dismantled plate buckling frame and the template are transported away, and the crane and the dismantled Bailey beam are guaranteed to have construction and placing positions. And (4) dismantling the fixed connection of the transverse Bailey beam in advance and hoisting the transverse Bailey beam to the ground.
(2) And after the fixed connection is removed, hoisting and removing the bailey bracket group integrated into a whole from the outer side of the cover beam by adopting a crane. And (3) dismantling sequence: the outer side is removed first, and the inner side is removed step by step.
(3) When the combined Bailey truss is dismantled, a special person directs the crane to integrally hoist the Bailey truss group connected into a whole to be hoisted to the ground, workers are timely arranged to disassemble the hoisted Bailey beams, and the Bailey beams are orderly stacked and then withdrawn for renting; constructors need to hold two ends of the Bailey beam by using the guy rope in the hoisting process, and the overlarge swinging amplitude of the Bailey beam in the hoisting process is prevented. The project department dispatches a full-time security officer to monitor during hoisting,
(4) and after the bailey frames are dismantled, the bailey frames are dismantled without being installed. When the crane is dismantled, a specially-assigned person is arranged to command the crane. The crane is with the device hoist and mount well earlier, then loosens the finish rolling screw-thread steel and connects, makes the staple bolt slowly leave the pier shaft, avoids causing the injury to the pier shaft. After falling to a ground safety position, the materials are concentrated and stacked, and when being hoisted, the materials are dragged by a cable wind rope.
Examples
The utility model discloses rely on the first-stage engineering of the new airport in Beijing city, new airport track line is the track circuit of connecting city center and the new airport in Beijing, and the design hourly speed reaches 160 kilometers per hour, will become the internal fastest urban rail engineering, also is the first case "rail constructs altogether" structure in Beijing city simultaneously. The overall form of the elevated co-construction structure is in an open shape, compared with other viaducts in Beijing, the position of a capping beam at the section of the standard is high, the self weight is large, the overall construction appearance of the middle cross beam and the upper capping beam is in a long strip-shaped solid concrete structure, the highest pier is 28.5m high, the maximum capping beam is 40.05 m long (the length of a widened section is 58.5 m), the width is 3 m, the height is 2.8 m, the construction risk of the pier is high, the difficulty is high, the construction period is short, and for the working condition, a dual-purpose device which is used as a pier column template and a prestress support is adopted for construction.
Claims (3)
1. The utility model provides a double-purpose device that double as pier stud template and prestressing force supported which characterized in that: the steel plate finishing process comprises a steel template (1), a bracket (2), a reinforcing plate (3), a vertical rib (4), a transverse rib (5), an upper end pull rod (6), a bolt (7), an upper end cross rod (8), finish-rolled deformed steel bar (9) and a groove steel plate (10); the steel formwork (1) is used as a formwork during pouring of the pier stud and also used as a prestress transmission device;
the brackets (2) are arranged in parallel in three rows along the longitudinal direction, and the brackets (2) are welded on the vertical ribs (4) on the outer side of the steel template (1); the transverse ribs (5) are embedded into the vertical ribs (4) to provide stress surfaces for the split bolts; the top of the steel template (1) is provided with two cross rods (8) vertical to the surface of the support, and the front end and the rear end of each cross rod (8) are respectively provided with a pull rod (6); twelve pieces of finish rolling deformed steel bars (9) are penetrated on the surface of the support, eight pieces of finish rolling deformed steel bars (9) are penetrated on the side surface of the support, counter pulling is carried out, and the friction force is increased by adopting a prestress applying mode; welding a bevel steel plate (10) of 200mm by 20mm on the surface of the position of each finish-rolled deformed steel bar (9); the outside of the finish-rolled deformed steel bar (9) is fixed through a bolt (7); the stress concentration part of the bracket (2) is welded and reinforced by a reinforcing plate (3).
2. The dual-purpose device of claim 1, which is used as both a pier stud template and a pre-stressed support, and is characterized in that: the bracket (2) and the steel formwork vertical rib (4) are made of 20# I-steel.
3. The dual-purpose device of claim 1, which is used as both a pier stud template and a pre-stressed support, and is characterized in that: the transverse ribs (5) and the transverse rods (8) are made of channel steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921284406.1U CN210797285U (en) | 2019-08-08 | 2019-08-08 | Dual-purpose device used as pier column template and prestress support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921284406.1U CN210797285U (en) | 2019-08-08 | 2019-08-08 | Dual-purpose device used as pier column template and prestress support |
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| CN210797285U true CN210797285U (en) | 2020-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468713A (en) * | 2019-08-08 | 2019-11-19 | 北京市政路桥股份有限公司 | It is a kind of as Pier Formwork and the dual-purpose apparatus and its construction method of pre-loaded support struts |
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2019
- 2019-08-08 CN CN201921284406.1U patent/CN210797285U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468713A (en) * | 2019-08-08 | 2019-11-19 | 北京市政路桥股份有限公司 | It is a kind of as Pier Formwork and the dual-purpose apparatus and its construction method of pre-loaded support struts |
| CN110468713B (en) * | 2019-08-08 | 2024-07-05 | 北京市政路桥股份有限公司 | Dual-purpose device used as pier column template and prestressed support and construction method thereof |
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