CN111636573A - Construction method for inclination adjustment in external expansion jacking process of net rack - Google Patents
Construction method for inclination adjustment in external expansion jacking process of net rack Download PDFInfo
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- CN111636573A CN111636573A CN202010582887.5A CN202010582887A CN111636573A CN 111636573 A CN111636573 A CN 111636573A CN 202010582887 A CN202010582887 A CN 202010582887A CN 111636573 A CN111636573 A CN 111636573A
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- jack
- net rack
- standard
- adjusted
- jacking
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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
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
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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
- E04B1/34—Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention provides a construction method for inclination adjustment in the process of externally expanding and jacking a net rack, which comprises the steps of splicing the net rack on a support frame on the ground; selecting a row of net rack ball nodes on the free end of the spliced net rack, and respectively installing a standard joint below the net rack ball nodes through a chain block; installing a digital inclinometer on the installed standard knot; a jack is arranged on the ground below each standard knot installed on the net rack, so that the top of a cylinder shaft of the jack is abutted against the bottom of the standard knot; starting the jack, and stopping jacking the jack when the deflection angle of the standard knot reaches the alarm angle value of the digital inclinometer; sequentially adjusting the jacks at intervals from two ends of the jacks arranged side by side in a cabin jumping manner; after the position of the jack to be adjusted is adjusted, the bottom of the standard section jacked by the jack is butted with another standard section; starting the jack with the adjusted position; and repeating the steps until the positions of all the jacks are adjusted.
Description
Technical Field
The invention relates to a construction method for jacking a net rack, in particular to a construction method for adjusting inclination in the process of outward-expanding jacking of the net rack.
Background
With the increase of the environmental protection strength of the country, many metallurgical open-air coal plants need to be managed in a closed mode, and due to the fact that the area of the open-air coal plant is large, in order to close the open-air coal plant, the welded ball grid structure with the large span becomes the first choice for closing the open-air coal plant. When the grid structure is installed, because the spatial structure of the grid is a quadrangular pyramid system, a construction method of jacking and outward expanding is often adopted in the installation process of the grid. In the jacking process, as the ball joint of the net rack moves in a parabola shape in the ascending process, the ball joint on the net rack and the jack can generate deviation after being jacked to a certain height, and the jack needs to be readjusted to ensure that the subsequent net rack jacking work is carried out smoothly. However, in the actual construction process, the deviation between the net rack ball joint and the jack is usually judged by workers, and because the observation angle and the judgment standard of each worker are different, the deviation between the ball joint on some net racks and the jack is not found when the deviation is large, so that the subsequent net rack jacking process cannot be smoothly carried out, and even the safety of the whole structure of the net rack is influenced.
Disclosure of Invention
The invention aims to provide a construction method for inclination adjustment in the process of externally expanding and jacking a net rack, and aims to solve the problem that the safety of the whole structure of the net rack is not easily judged and influenced when deviation between a net rack ball joint and a jack needs to be adjusted in the process of jacking the net rack.
The invention is realized by the following steps: a construction method for inclination adjustment in the process of externally expanding and jacking a net rack is characterized by comprising the following steps:
a. arranging a support frame on the ground, splicing the net rack on the support frame, wherein the end part of the net rack to be continuously spliced is a free end;
b. selecting a row of net rack ball nodes on the free end of the spliced net rack, respectively installing a standard joint below the net rack ball nodes through a chain block, wherein the standard joints are kept vertical under the action of gravity, and the tops of the standard joints are contacted with the net rack ball nodes;
c. installing a digital inclinometer on the installed standard knot, initializing the digital inclinometer and setting an alarm angle value of the digital inclinometer;
d. a jack is arranged on the ground below each standard joint installed on the net rack, so that the top of a cylinder shaft of the jack is abutted against the bottom of the standard joint, and the jacks and the net rack ball joints are correspondingly arranged side by side;
e. starting the jack to synchronously jack the jack arranged below the standard knot, wherein the standard knot can deflect in the process of jacking the net rack, and when the deflection angle of the standard knot reaches the alarm angle value of the digital inclinometer, the digital inclinometer gives out an alarm sound and stops jacking the jack;
f. sequentially adjusting the jacks at intervals from two ends of the jacks arranged side by side in a cabin jumping manner; before the jack is adjusted, firstly, recording a pressure value on the jack to be adjusted, then decompressing the jack, namely retracting a cylinder shaft of the jack, and then adjusting the position of the jack to align the top of the cylinder shaft of the jack with a ball joint at the installation position of a standard knot above the cylinder shaft of the jack;
g. after the position of the jack to be adjusted is adjusted, the bottom of the standard joint jacked by the jack is butted with another standard joint, and the standard joint is kept vertical under the action of self gravity;
h. starting the jack with the adjusted position, enabling the top of a cylinder shaft of the jack to abut against the bottom of the butted standard joint, and enabling the pressure value of the jack to be consistent with the previously recorded pressure value;
i. and f, repeating the steps f to h until the positions of all the jacks are well adjusted, so as to perform subsequent grid construction operation.
The standard knot comprises a top plate which is horizontally arranged and a plurality of vertical rods which are vertically arranged on the lower plate surface of the top plate, and the upper plate surface of the top plate is used for being in contact with the ball nodes on the net rack; the upright rods are arranged at the edge of the lower plate surface of the top plate so as to vacate a jacking area with the middle part used for contacting with the top of the jack cylinder shaft; when the two standard knots are butted, the upper plate surface of the top plate of the standard knot positioned below is fixedly connected with the bottom of the upright rod of the standard knot positioned above.
The roof is equilateral triangle shaped plate, the pole setting has threely, sets up respectively the edge of the lower face of roof.
And chamfering three corners of the top plate.
The invention provides a method for adjusting the position of a jack in the process of expanding and jacking a net rack. The method is feasible, high in accuracy, safe and reliable. The invention adopts a mode of jumping from two ends of the jacks arranged side by side when adjusting the positions of the jacks, thereby ensuring the stability of the integral structure of the net rack. The invention effectively solves the problems that the deviation can occur between the upper ball joint of the net rack and the jack after the net rack is jacked to a certain height in the process of lifting, the judgment by human eyes is not easy, and the stability of the whole structure of the net rack is influenced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of two standard joints after butt joint.
In the figure: 1. a net frame; 2. a net rack ball joint; 3. a standard section; 4. a jack; 5. a top plate; 6. and (6) erecting a rod.
Detailed Description
As shown in fig. 1 and 2, the construction method for adjusting the inclination in the outward expanding and jacking process of the net rack of the invention comprises the following steps:
a. set up the support frame (not shown in the figure) subaerial, splice rack 1 on the support frame, the tip of waiting to continue to splice rack 1 is the free end, and the tip of the rack 1 that waits to expand outward is the free end promptly.
b. A row of net rack ball nodes 2 are selected at the free end of the spliced net rack 1, a standard joint 3 is respectively arranged below the net rack ball nodes through a chain block, the standard joints 3 keep vertical under the action of gravity, and the top of the standard joints is contacted with the net rack ball nodes 2; the structure of the standard joint 3 is as shown in fig. 2, and the structure comprises a top plate 5 horizontally arranged and a plurality of vertical rods 6 vertically arranged on the lower plate surface of the top plate 5, wherein the upper plate surface of the top plate 5 is used for contacting with a net rack ball joint 2 for selected jacking on a net rack 1, and the vertical rods 6 are arranged at the edge of the lower plate surface of the top plate 5 to free a jacking area with the middle part used for contacting with the top of a cylinder shaft of a jack 4. In this embodiment, the top plate 5 of the standard knot 3 is an equilateral triangle, one top plate 5 corresponds to three vertical rods 6, and the three vertical rods 6 are respectively arranged at the corners of the lower plate surface of the top plate 5. In order to prevent cutting workers in the assembling process, chamfering treatment is carried out on three corners of the top plate 5.
c. The digital inclinometer is installed on the installed standard knot, the digital inclinometer is initialized, and the alarm angle value of the digital inclinometer is set.
d. A jack 4 is arranged on the ground below each standard joint 3 which is well installed on the net rack 1, so that the top of a cylinder shaft of the jack 4 is abutted against the bottom of the standard joint 3, and as the net rack ball joints 2 on the selected net rack 1 are arranged side by side, and a jack 4 is arranged below each net rack ball joint 2, the jacks 4 are also arranged side by side as the net rack ball joints 2.
e. And starting the jack 4 to synchronously jack the jack 4 arranged below the standard knot 3, wherein the standard knot 3 can deflect in the jacking process of the net rack 1, and when the deflection angle of the standard knot 3 reaches the alarm angle value of the digital inclinometer, the digital inclinometer can give out an alarm sound, and at the moment, the jack 4 needs to be immediately stopped to jack.
f. The jacks 4 are simultaneously and sequentially adjusted at intervals from two ends to the middle of the jacks 4 arranged side by side in a cabin jumping mode; before adjusting jack 4, at first note the pressure value on jack 4 of treating the adjustment, make jack 4 pressure release again, even the cylinder shaft of jack 4 retracts to initial position, then adjust the position of jack 4, make the cylinder shaft top of jack 4 align rather than the rack ball joint 2 of the mounted position department of the standard festival above it, can adopt tools such as magnetic force line weight to measure the adjustment in this process.
g. After the position of the jack 4 to be adjusted is adjusted, another standard joint 3 is butted at the bottom of the standard joint 3 lifted by the jack 4, and the butted standard joint 3 keeps vertical under the action of self gravity. This embodiment docks standard festival 3 when the position of adjustment jack 4, has both adjusted the position of jack 4, is equivalent to the jacking limit height that the looks has increased jack 4 again for jack 4 can satisfy the operation requirement of rack 1 jacking height. Of course, a plurality of standard joints 3 can be butted in the step, as long as the bottommost part of the butted standard joints 3 is higher than the top of the cylinder shaft of the jack 4. When the two standard knots 3 are butted, the upper plate surface of the top plate 5 of the standard knot 3 positioned below is connected with the bottom of the upright 6 of the standard knot 3 fixedly connected above, as shown in fig. 2.
h. And starting the jack 4 with the adjusted position, enabling the top of the cylinder shaft of the jack 4 to abut against the bottom of the butted standard joint 3, and enabling the pressure value of the jack 3 to be consistent with the previously recorded pressure value so as to ensure the stability of the net rack 1.
i. And f, repeating the steps f to h until the positions of all the jacks 4 are adjusted, so as to perform subsequent construction operation of the net rack 1.
Claims (4)
1. A construction method for inclination adjustment in the process of externally expanding and jacking a net rack is characterized by comprising the following steps:
a. arranging a support frame on the ground, splicing the net rack on the support frame, wherein the end part of the net rack to be continuously spliced is a free end;
b. selecting a row of net rack ball nodes on the free end of the spliced net rack, respectively installing a standard joint below the net rack ball nodes through a chain block, wherein the standard joints are kept vertical under the action of gravity, and the tops of the standard joints are contacted with the net rack ball nodes;
c. installing a digital inclinometer on the installed standard knot, initializing the digital inclinometer and setting an alarm angle value of the digital inclinometer;
d. a jack is arranged on the ground below each standard joint installed on the net rack, so that the top of a cylinder shaft of the jack is abutted against the bottom of the standard joint, and the jacks and the net rack ball joints are correspondingly arranged side by side;
e. starting the jack to synchronously jack the jack arranged below the standard knot, wherein the standard knot can deflect in the process of jacking the net rack, and when the deflection angle of the standard knot reaches the alarm angle value of the digital inclinometer, the digital inclinometer gives out an alarm sound and stops jacking the jack;
f. sequentially adjusting the jacks at intervals from two ends of the jacks arranged side by side in a cabin jumping manner; before the jack is adjusted, firstly, recording a pressure value on the jack to be adjusted, then decompressing the jack, namely retracting a cylinder shaft of the jack, and then adjusting the position of the jack to align the top of the cylinder shaft of the jack with a ball joint at the installation position of a standard knot above the cylinder shaft of the jack;
g. after the position of the jack to be adjusted is adjusted, the bottom of the standard joint jacked by the jack is butted with another standard joint, and the standard joint is kept vertical under the action of self gravity;
h. starting the jack with the adjusted position, enabling the top of a cylinder shaft of the jack to abut against the bottom of the butted standard joint, and enabling the pressure value of the jack to be consistent with the previously recorded pressure value;
i. and f, repeating the steps f to h until the positions of all the jacks are well adjusted, so as to perform subsequent grid construction operation.
2. The construction method for adjusting the inclination in the outward expanding and jacking process of the net rack as claimed in claim 1, wherein the standard knot comprises a top plate arranged horizontally and a plurality of vertical rods vertically arranged on the lower plate surface of the top plate, and the upper plate surface of the top plate is used for contacting with the ball joint on the net rack; the upright rods are arranged at the edge of the lower plate surface of the top plate so as to vacate a jacking area with the middle part used for contacting with the top of the jack cylinder shaft; when the two standard knots are butted, the upper plate surface of the top plate of the standard knot positioned below is fixedly connected with the bottom of the upright rod of the standard knot positioned above.
3. The construction method for adjusting the inclination of the net rack in the outward expanding and jacking process as claimed in claim 2, wherein the top plate is an equilateral triangle plate, and the number of the vertical rods is three, and the three vertical rods are respectively arranged at the corners of the lower plate surface of the top plate.
4. The construction method for adjusting the inclination of the net rack in the outward expanding and jacking process as claimed in claim 3, wherein three corners of the top plate are chamfered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010582887.5A CN111636573A (en) | 2020-06-23 | 2020-06-23 | Construction method for inclination adjustment in external expansion jacking process of net rack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010582887.5A CN111636573A (en) | 2020-06-23 | 2020-06-23 | Construction method for inclination adjustment in external expansion jacking process of net rack |
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| CN111636573A true CN111636573A (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010582887.5A Pending CN111636573A (en) | 2020-06-23 | 2020-06-23 | Construction method for inclination adjustment in external expansion jacking process of net rack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112211292A (en) * | 2020-10-20 | 2021-01-12 | 智远谋 | Method for lifting and mounting net rack for building construction |
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Cited By (2)
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Application publication date: 20200908 |