CN110387825B - Construction method for quickly adjusting holes and postures of prefabricated stand columns - Google Patents
Construction method for quickly adjusting holes and postures of prefabricated stand columns Download PDFInfo
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- CN110387825B CN110387825B CN201910643977.8A CN201910643977A CN110387825B CN 110387825 B CN110387825 B CN 110387825B CN 201910643977 A CN201910643977 A CN 201910643977A CN 110387825 B CN110387825 B CN 110387825B
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- prefabricated stand
- stand column
- bearing platform
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses a construction method for quickly adjusting holes and postures of a prefabricated stand column, which comprises the following steps of: hoisting the prefabricated stand column to move to the position right above the bearing platform, wherein a plurality of embedded steel bars are vertically arranged on the top surface of the bearing platform, and a plurality of embedded sleeves are vertically and correspondingly arranged in the prefabricated stand column; clamping the embedded steel bars by using guide conical pliers to guide the prefabricated stand columns to fall gradually, so that the embedded sleeves accurately align the embedded steel bars; and removing the guide conical pliers, and horizontally pushing the prefabricated stand column by using the position regulators installed on the four sides of the top surface of the bearing platform when the prefabricated stand column falls to a preset height from the top surface of the bearing platform, and finely adjusting the plane position of the prefabricated stand column to enable the prefabricated stand column to accurately fall to the center of the bearing platform. The invention has the advantages that: the prefabricated stand column can be quickly placed in place in the hoisting process, and the times and time of trial hoisting in the hoisting process are reduced; the plane position and the perpendicularity of the prefabricated stand column can be conveniently and accurately adjusted in the hoisting process, the construction error is controllable, the operation is simple, and the safety risk is low.
Description
Technical Field
The invention relates to the technical field of bridge prefabrication and assembly construction, in particular to a construction method for quickly adjusting holes and postures of prefabricated stand columns.
Background
Along with the popularization of the bridge prefabrication and assembly construction process in bridge construction, a large number of prefabricated stand columns need to be hoisted in the construction process, the hoisting quantity of the stand columns is large, and the danger is large in the hoisting process due to the fact that the weight of a single stand column is dozens of tons or even hundreds of tons.
The traditional upright column mainly takes cast-in-place as a main part and has no large-scale and large-tonnage hoisting. In these years, a few prefabricated and assembled bridge projects also appear, but the hoisting process is complicated, the efficiency is low, and the hoisting precision control of the upright posts is not high.
Disclosure of Invention
The invention aims to provide a construction method for quickly adjusting the hole alignment and the posture of a prefabricated stand column according to the defects of the prior art, the construction method levels the height of a bearing platform surface before a sleeve at the bottom of the prefabricated stand column aligns a pre-embedded steel bar of the bearing platform, the sleeve at the bottom of the prefabricated stand column is enabled to quickly align the hole in the steel bar of the bearing platform through self-made guiding tapered pliers in the hoisting process, the plane position of the prefabricated stand column is adjusted through an azimuth adjuster, the verticality of the stand column is adjusted through jacking a bracket on the prefabricated stand column, the whole process is short in time consumption, low in noise and simple to operate, and the safety risk in the hoisting process is reduced.
The purpose of the invention is realized by the following technical scheme:
a construction method for quickly adjusting holes and postures of a prefabricated stand column is characterized by comprising the following steps: hoisting a prefabricated stand column to move to a position right above a bearing platform, wherein a plurality of embedded steel bars are vertically arranged on the top surface of the bearing platform, and a plurality of embedded sleeves are vertically and correspondingly arranged in the prefabricated stand column; clamping the embedded steel bars by using guide conical pliers to guide the prefabricated stand columns to fall gradually, so that the embedded sleeves are accurately aligned with the embedded steel bars and the embedded steel bars are sleeved in the embedded steel bars; and removing the guide conical pliers, horizontally pushing the prefabricated stand column by using azimuth regulators installed on four sides of the top surface of the bearing platform when the prefabricated stand column falls to a preset height from the top surface of the bearing platform, and finely adjusting the plane position of the prefabricated stand column to accurately fall to the center of the bearing platform.
The four sides of the top surface of the bearing platform are provided with angle steels, and the direction regulator is arranged on the angle steels.
The construction method further comprises the following steps: the prefabricated stand falls completely back on the cushion cap, utilize set up in jacking device jacking all around the top surface of cushion cap the bracket of prefabricated stand's side preinstallation, the fine tuning the straightness that hangs down of prefabricated stand.
A plurality of threaded sleeves are pre-embedded in the prefabricated stand columns, one end portions of the threaded sleeves extend out of the side faces of the prefabricated stand columns, and the brackets are installed in the threaded sleeves.
And each side surface of the prefabricated stand column is provided with a grouting hole communicated with the embedded sleeve, and the bracket is arranged in the grouting hole.
The construction method further comprises the following steps: and measuring the elevation of the center of the top surface of the bearing platform, and placing a steel plate and a rubber plate with corresponding thickness at the center of the top surface of the bearing platform to adjust the elevation of the top surface of the bearing platform so as to meet the requirement of design elevation.
The specific method for finely adjusting the plane position of the prefabricated stand column comprises the following steps: the method comprises the steps that vertical center line marks are arranged on each side face of the prefabricated stand column in advance, a calibrating device is used for observing the vertical center line marks to obtain deviation from the central axis of the top face of the bearing platform, and the prefabricated stand column is pushed horizontally according to the deviation through the direction regulators located in different directions so that the prefabricated stand column can fall down accurately in a centering mode.
The calibrating device is a theodolite or a total station.
The guide conical pliers comprise pliers handles, connecting shafts and pliers mouths, the pliers handles are connected with the pliers mouths through the connecting shafts, and conical guide pieces are arranged on the pliers mouths in a direction perpendicular to the occlusion direction of the pliers mouths.
The invention has the advantages that: the prefabricated stand column can be quickly placed in place in the hoisting process, and the times and time of trial hoisting in the hoisting process are reduced; the plane position and the perpendicularity of the prefabricated stand column can be conveniently and accurately adjusted in the hoisting process, the construction error is controllable, the operation is simple, and the safety risk is low.
Drawings
FIG. 1 is a schematic elevation view of a hole aligned with a prefabricated column according to the present invention;
FIG. 2 is a schematic plan view of the integral hoisting of the prefabricated column according to the present invention;
FIG. 3 is a schematic elevation view illustrating the adjustment of the plane position of the prefabricated column according to the present invention;
FIG. 4 is a schematic elevation view illustrating perpendicularity adjustment of the prefabricated column according to the present invention;
FIG. 5 is a schematic top view of a pilot cone clamp according to the present invention;
FIG. 6 is a side view of the pilot cone clamp of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
referring to fig. 1-6, the labels 1-15 in the drawings are: the adjustable clamp comprises an adjusting cushion block 1, a calibrating device 2, a guide conical clamp 3, an azimuth regulator 4, angle steel 5, embedded steel bars 6, a prefabricated stand column 7, an embedded sleeve 8, a bracket 9, a jacking device 10, a bearing platform 11, a clamp handle 12, a connecting shaft 13, a clamp mouth 14 and a guide piece 15.
Example (b): as shown in the figure, the embodiment specifically relates to a construction method for quickly adjusting holes and postures of prefabricated columns, the construction method levels the elevation of the top surface of a bearing platform 11 before an embedded sleeve 8 at the bottom of the prefabricated column 7 aligns an embedded steel bar 6 on the bearing platform 11, the embedded sleeve 8 of the prefabricated column 7 is enabled to quickly align the embedded steel bar 6 on the bearing platform 11 through a self-made guiding tapered clamp 3 in the hoisting process, the plane position of the prefabricated column 7 is adjusted through an azimuth adjuster 4, the verticality of the prefabricated column 7 is adjusted through jacking a bracket 9 on the prefabricated column 7, the whole process is short in time consumption, low in noise and simple to operate, and the safety risk in the hoisting process is reduced.
As shown in fig. 1 to 6, the construction method for quickly adjusting the hole and the posture of the prefabricated stand column in the embodiment includes the following steps:
(1) prefabricating a prefabricated stand column 7 in advance, embedding a circle of vertically arranged embedded sleeves 8 at the bottom of the prefabricated stand column 7 in a prefabricating stage, arranging grouting holes on each side surface of the prefabricated stand column 7, enabling the grouting holes to be communicated with the embedded sleeves 8 so as to conveniently perform grouting in the embedded sleeves 8, wherein the grouting holes can also be replaced by embedded threaded sleeves, corresponding threaded sleeves penetrate through the embedded sleeves 8, and meanwhile, one ends of the threaded sleeves extend out of the corresponding side surfaces; prefabricated cushion cap 11 to correspond prefabricated stand 7 whereabouts position department at the concatenation face of cushion cap 11 and vertically set up a plurality of embedded bars 6, embedded bar 6 sets up the form and corresponding with embedded sleeve 8, and embedded bar 6's diameter is less than embedded sleeve 8's internal diameter, in order to ensure that embedded bar 6 can stretch into embedded sleeve 8. The layout form of the embedded sleeve 8 and the embedded steel bars 6 can be changed according to actual engineering requirements, and if two or more circles of the embedded sleeve 8 and the embedded steel bars 6 are arranged, the embedded sleeve and the embedded steel bars can also be arranged in a circular or triangular manner.
(2) The bracket 9 is installed by means of grouting holes of the embedded sleeves 8 which are communicated with the center of each side surface in the prefabricated upright post 7, namely, one bracket 9 is installed on each of the four side surfaces of the prefabricated upright post 7 at the grouting hole; the four sides of the splicing surface (namely the top surface) of the bearing platform 11 are provided with angle steels 5, and the middle position of each edge of the angle steel 5 is provided with an azimuth regulator 4; drawing central axes of four sides of the splicing surface on the bearing platform 11, randomly placing two calibration devices 2 which are erected and positioned vertically to each other on the four central axes of the splicing surface of the bearing platform 11, and simultaneously popping ink lines on the vertical central axes of the four side surfaces of the prefabricated stand column 7; in this embodiment, the calibration device 2 may be a theodolite or a total station.
(3) The elevation data of the center position of the splicing surface of the bearing platform 11 is measured by the level gauge and is compared with a set value on a design drawing, the elevation of the splicing surface of the bearing platform 11 is adjusted by placing an adjusting cushion block 1 with a certain thickness at the center of the splicing surface of the bearing platform 11 so as to meet the design requirement, and the adjusting cushion block 1 can be a steel plate or a rubber plate.
(4) The prefabricated stand column 7 is lifted and transferred to the upper portion of the bearing platform 11, two self-made guide conical tongs 3 are used for clamping two embedded steel bars 6 on the bearing platform 11, the two clamped embedded steel bars 6 are generally selected to be located on different side faces, the prefabricated stand column 7 gradually falls down, the guide conical tongs 3 are provided with a guide piece 15 which is vertically arranged, so that the prefabricated stand column 7 can be guided to fall down along the guide conical tongs 3 in a set direction, finally, an embedded sleeve 8 in the prefabricated stand column 7 successfully aligns the embedded steel bars 6 on the bearing platform 11, when the embedded sleeve 8 is partially sleeved outside the upper end portion of the prefabricated steel bars 6, the guide conical tongs 3 can be loosened, the guide conical tongs are moved down to be separated from the embedded sleeve 8, and therefore the guide conical tongs 3 can be smoothly taken away. The diameter of the embedded sleeve 8 is larger than the outer diameter of the guide conical pliers 3 when the embedded steel bar 6 is clamped tightly.
The guide tapered pliers 3 in the embodiment comprises a pliers handle 12, a connecting shaft 13 and a pliers mouth 14, wherein the pliers handle 12 is connected with the pliers mouth 14 through the connecting shaft 13, when force is applied to the pliers handle 12 to enable the pliers handle 12 to move oppositely, the pliers mouth 14 is occluded, a guide piece 15 is arranged on the pliers mouth 14 perpendicular to the occlusal surface of the pliers mouth, the guide piece 15 is conical, and the pliers mouth 14 and the guide piece 15 can be integrally formed or formed by welding in sections.
(5) The prefabricated upright post 7 continuously falls gradually under the guidance of the embedded steel bars 6, when the prefabricated upright post 7 falls to a height of 3-5 cm away from the bearing platform surface, the deviation between the center of the bottom edge of the side surface of the prefabricated upright post 7 (namely the intersection point of the central line of the ink line of the side surface and the bottom edge) and the central axis of the corresponding edge on the splicing surface of the bearing platform 11 is observed through the calibrating device 2, then the prefabricated upright post 7 is horizontally jacked into the prefabricated upright post 7 by utilizing the azimuth regulators 4 arranged on the angle steel 5 at the four edges of the bearing platform 11 according to the measured deviation data, and because the prefabricated upright post 7 is in a suspension state at the moment, jacking operation is easy, so that the plane position of the prefabricated upright post 7 is adjusted, and then the prefabricated upright post 7 is slowly hoisted down to accurately fall to the center set position of the splicing surface of the bearing platform 11; the azimuth adjuster 4 may be a large-diameter bolt that can be screwed in, or may be a device such as a jack.
(6) After the prefabricated upright post 7 completely falls onto the bearing platform 11, the deviation between the center of the top edge of the side surface of the prefabricated upright post 7 (namely the intersection point of the central line of the ink line of the side surface and the top edge) and the central axis of the splicing surface of the bearing platform 11 is observed by using the calibrating device 2, and then the bracket 9 on the side surface of the prefabricated upright post 7 is jacked by using the jacking devices 10 around the splicing surface of the bearing platform 11 according to the measured deviation data, so that the verticality of the prefabricated upright post 7 is accurately adjusted, and the jacking devices 10 can be jacks and other devices.
(7) And (5) performing subsequent pouring construction, and finally completing splicing of the prefabricated stand columns.
The beneficial effect of this embodiment is: (1) the whole set of device is simple, safe and practical, the stand column can be quickly positioned in place in the hoisting process, and the times and time of trial hoisting in the hoisting process are reduced; (2) the height of the bearing platform surface is leveled before the sleeve at the bottom of the prefabricated stand column is aligned with the embedded steel bars of the bearing platform, the sleeve at the bottom of the stand column can be quickly aligned in the steel bars of the bearing platform by self-made guiding tapered pliers in the hoisting process, the plane position of the stand column can be adjusted by an azimuth adjuster, and the verticality of the stand column can be adjusted by jacking the bracket on the prefabricated stand column; (3) the whole process is short in time consumption, low in noise and simple to operate, and safety risks in the hoisting process are reduced.
Claims (1)
1. A construction method for quickly adjusting holes and postures of a prefabricated stand column is characterized by comprising the following steps: hoisting a prefabricated stand column to move to a position right above a bearing platform, wherein a plurality of embedded steel bars are vertically arranged on the top surface of the bearing platform, and a plurality of embedded sleeves are vertically and correspondingly arranged in the prefabricated stand column; clamping the embedded steel bars by using guide conical pliers to guide the prefabricated stand columns to fall gradually, so that the embedded sleeves are accurately aligned with the embedded steel bars and the embedded steel bars are sleeved in the embedded steel bars; removing the guide conical pliers, horizontally pushing the prefabricated stand column by using azimuth regulators installed on four sides of the top surface of the bearing platform when the prefabricated stand column falls to a preset height from the top surface of the bearing platform, and finely adjusting the plane position of the prefabricated stand column to accurately fall to the center of the bearing platform; measuring the elevation of the center of the top surface of the bearing platform, and placing a steel plate and a rubber plate with corresponding thicknesses in the center of the top surface of the bearing platform to adjust the elevation of the top surface of the bearing platform so as to meet the requirement of design elevation; the specific method for finely adjusting the plane position of the prefabricated stand column comprises the following steps: arranging vertical central line marks on each side surface of the prefabricated stand column in advance, observing the vertical central line marks by using a calibration device to acquire deviation from a central axis of the top surface of the bearing platform, and pushing the prefabricated stand column horizontally according to the deviation by the direction regulators positioned in different directions to enable the prefabricated stand column to fall accurately in a centering way; the calibration device is a theodolite or a total station; the guide conical pliers comprise pliers handles, connecting shafts and pliers mouths, the pliers handles are connected with the pliers mouths through the connecting shafts, and conical guide pieces are arranged on the pliers mouths in a direction perpendicular to the occlusion direction of the pliers mouths;
angle steel is arranged on four sides of the top surface of the bearing platform, and the direction regulator is arranged on the angle steel; the construction method further comprises the following steps: after the prefabricated stand column completely falls onto the bearing platform, jacking devices arranged around the top surface of the bearing platform are used for jacking the brackets pre-installed on the side surfaces of the prefabricated stand column, and the verticality of the prefabricated stand column is finely adjusted; a plurality of threaded sleeves are pre-embedded in the prefabricated stand columns, one end parts of the threaded sleeves extend out of the side surfaces of the prefabricated stand columns, and the brackets are installed in the threaded sleeves; each side surface of the prefabricated upright post is provided with a grouting hole communicated with the embedded sleeve, and the bracket is arranged in the grouting hole;
the method for removing the guide conical clamp comprises the following steps: when the embedded sleeve is partially sleeved outside the upper end part of the prefabricated steel bar, the guiding tapered pliers are loosened and moved downwards to be separated from the embedded sleeve, and therefore the guiding tapered pliers are taken away.
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| CN201910643977.8A CN110387825B (en) | 2019-07-17 | 2019-07-17 | Construction method for quickly adjusting holes and postures of prefabricated stand columns |
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| CN201910643977.8A CN110387825B (en) | 2019-07-17 | 2019-07-17 | Construction method for quickly adjusting holes and postures of prefabricated stand columns |
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| CN110387825B true CN110387825B (en) | 2021-10-19 |
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| CN110863652A (en) * | 2019-11-25 | 2020-03-06 | 上海市基础工程集团有限公司 | Precise positioning and mounting method for prefabricated and assembled double-section stand column |
| CN112211106B (en) * | 2020-10-29 | 2023-01-10 | 中铁四局集团第一工程有限公司 | Method for installing prefabricated capping beam of viaduct |
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| CN113026562A (en) * | 2021-03-15 | 2021-06-25 | 中铁大桥局上海工程有限公司 | Rapid positioning device and method for prefabricated capping beam and prefabricated stand column |
| CN113668406B (en) * | 2021-09-26 | 2023-04-11 | 河南国基建设集团有限公司 | Municipal construction prefabricated pier erecting device and erecting method thereof |
| CN114046054B (en) * | 2021-12-27 | 2022-06-21 | 山东同创设计咨询集团有限公司 | Guide positioning device for assembly type building component and construction method |
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