CN111397786A - Super-thick floor slab support frame axial force monitoring system and method for verifying dismantling condition - Google Patents
Super-thick floor slab support frame axial force monitoring system and method for verifying dismantling condition Download PDFInfo
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- CN111397786A CN111397786A CN201811635561.3A CN201811635561A CN111397786A CN 111397786 A CN111397786 A CN 111397786A CN 201811635561 A CN201811635561 A CN 201811635561A CN 111397786 A CN111397786 A CN 111397786A
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- axial force
- concrete
- floor slab
- support frame
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
Abstract
The invention relates to an axial force monitoring system of an ultra-thick floor slab supporting frame and a verification method of dismantling conditions of the system. Specifically, the axial force monitoring system comprises an ultra-thick floor slab supporting frame (5) and an axial force monitoring device; the axial force monitoring device is used for monitoring the axial force of the super-thick floor slab supporting frame; the axial force monitoring device comprises an adjustable jacking (6), a jack (7), an axial force sensing line (8) and a data acquisition instrument (9). According to the verification method for the dismantling condition of the thick floor slab supporting frame, the axial force monitoring device is arranged at the top of the super-thick floor slab supporting frame, whether the supporting frame bears the pressure of the concrete of the upper floor slab can be accurately judged, and therefore whether the supporting frame can be dismantled can be timely determined, and waste of cost is reduced.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to an axial force monitoring system for a support frame of an ultra-thick floor slab and a verification method for dismantling conditions.
Background
In the construction process of the ultra-thick concrete floor slab, the concrete volume and the self weight are large, so that the requirement on the bearing capacity of the concrete formwork support frame is high. In order to meet the requirement of bearing capacity, two methods are generally used, namely, the bearing capacity of a frame body is improved by adjusting factors such as the distance between vertical rods of the frame body and the like; and secondly, the super-thick floor slabs are poured in layers, after the concrete of the lower floor slab reaches a certain strength, the lower floor slab is used as a template and bears the load of the concrete of the upper floor slab together with the supporting frame, and the super-thick floor slabs and the supporting frame form a whole together after the concrete of the upper floor slab is poured. When the ultra-thick concrete floor slabs are cast in layers, the lower floor slab can already support the load of the upper floor slab independently, so that a support frame is not needed. However, it is often impossible to verify whether the support frame can be removed, which results in a long turnover time of the support frame, resulting in waste of materials and an increase in cost.
Therefore, there is a need in the art to develop a method for verifying the removal condition of the support frame for an ultra-thick floor slab, so that the support frame can be removed in time, thereby achieving the purpose of saving cost.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide an axial force monitoring system for an ultra-thick floor slab supporting frame and a verification method for the removal condition of the ultra-thick floor slab supporting frame.
In order to achieve the purpose, the invention provides the following technical scheme:
the axial force monitoring system for the support frame of the super-thick floor slab comprises a support frame 5 and an axial force monitoring device; the axial force monitoring device is used for monitoring the axial force of the support frame; the support frame is used for supporting the ultra-thick floor slab and a template for pouring the ultra-thick floor slab;
the axial force monitoring device comprises an adjustable jacking 6, a jack 7, an axial force sensing line 8 and a data acquisition instrument 9; the adjustable jacking is arranged at the top of the support frame to be monitored; the jack is arranged below the adjustable supporting top and can tightly support or loosen the adjustable supporting top; meanwhile, the jack is connected with an axial force sensing line, the axial force sensing line is connected with a data acquisition instrument, and the data acquisition instrument is used for reading and measuring the axial force value of the support frame to be monitored; the axial force monitoring device can be used for loading or unloading by adjusting the jack.
Preferably, the formwork for casting the ultra-thick floor slab comprises a side formwork 1 and a bottom formwork 2; the side formworks 1 and the bottom formworks 2 form a space for pouring floor slab concrete.
Preferably, a main beam 4 and a secondary beam 3 are further included between the formwork for pouring the super-thick floor slab and the support frame; the secondary beam 3 is arranged below the bottom template 2 and used for supporting the template for pouring the super-thick floor slab; the main beam 4 is arranged below the secondary beam 3 and used for supporting the secondary beam 3.
Preferably, the support frame is mounted below the main beam; the adjustable jacking is arranged at the top of the support frame and below the main beam.
Preferably, the data acquisition instrument is mounted on the outside of the support frame.
Preferably, all the supports are evenly distributed.
Preferably, every 4 scaffolds make up a 600mm by 600mm square.
Preferably, the data acquisition instrument can respectively display the axial force of the support frame to be monitored; the support frame to be monitored is all or part of the support frames.
Preferably, the support frame to be monitored is a part of the support frames; the partial supporting frame is positioned in the midspan area of the concrete of the lower floor slab.
Preferably, the partial scaffolds are 3-5 scaffolds.
The method for verifying the dismantling condition of the support frame of the super-thick floor slab further comprises the following steps:
(1) installing the axial force monitoring system of the support frame of the super-thick floor slab;
(2) after the installation is finished, pouring concrete of a lower floor slab in a template for pouring the super-thick floor slab;
(3) after the concrete of the lower floor is finally set, pouring the concrete of the upper floor by taking the concrete of the lower floor as a template;
(4) the axial force monitoring device unloads by adjusting the jack, and reads and measures an axial force value on the data acquisition instrument while unloading;
(5) judging whether the support frame and the lower floor slab concrete bear the load of the upper floor slab concrete together through the axial force value; if the axial force value is not zero, the support frame still bears the load of the concrete of the upper floor, and the support frame cannot be detached; if the axial force value is zero, the support frame does not bear the load of the concrete of the upper floor, and the support frame can be detached.
Preferably, in the step (4), the axial force monitoring device unloads by loosening the jack, and the axial force value is read on the data acquisition instrument while unloading.
Also provided is a method of adjusting the strength of concrete for a lower floor to fully bear the concrete for an upper floor, comprising the steps of:
(a) installing the axial force monitoring system of the support frame of the super-thick floor slab;
(b) after the installation is finished, pouring concrete of a lower floor slab in a template for pouring the super-thick floor slab;
(c) after the concrete of the lower floor is finally set, pouring the concrete of the upper floor by taking the concrete of the lower floor as a template;
(d) the axial force monitoring device unloads by adjusting the jack, and reads and measures an axial force value on the data acquisition instrument while unloading;
(e) when the axial force value is not zero, the axial force monitoring device loads by adjusting the jack, waits for the strength of the concrete of the lower floor to increase along with the age of time, and returns to the step (d) periodically during the waiting period;
(f) and (e) repeating the steps (d) and (e) until the axial force value is zero, namely, the concrete strength of the lower floor can completely bear the concrete of the upper floor.
Preferably, in the step (d), the axial force monitoring device unloads by releasing the jack, and the axial force value is read on the data acquisition instrument while unloading.
Preferably, in step (e), the periodic return to step (d) is every 24 hours.
The technical scheme of the invention has the following beneficial effects:
by installing the axial force monitoring device at the top of the support frame of the super-thick floor slab and reading and measuring the axial force value of the support frame according to the verification method, whether the support frame bears the concrete of the upper floor slab or not can be accurately judged. When the axial force value of the support frame is zero, the support frame can be detached in time for turnover use, so that the cost waste can be greatly reduced.
Drawings
FIG. 1 is a flow chart of a verification method of the present invention.
FIG. 2 is a schematic view of an axial force monitoring system of the present invention.
FIG. 3 is an enlarged schematic view of a portion of the axial force monitoring system.
In the figure, the position of the upper end of the main shaft,
1: side form
2: bottom template
3: secondary beam
4: main beam
5: supporting frame
6: adjustable jacking
7: jack
8: axial force sensing wire
9: data acquisition instrument
10: concrete for lower floor
11: concrete for upper floor.
Detailed Description
The invention is further described below with reference to the specific drawings.
The invention provides an axial force monitoring system of an ultra-thick floor slab supporting frame and a verification method of removal conditions of the ultra-thick floor slab supporting frame by using the axial force monitoring system, which are used for verifying whether the ultra-thick floor slab supporting frame can be removed during layered pouring of an ultra-thick floor slab. According to the method, whether the support frame of the super-thick floor slab can be detached or not is determined by monitoring the load of the support frame during the layered pouring of the super-thick floor slab.
The installation of the super-thick floor slab support frame axial force monitoring system is shown in figures 2 and 3.
The super-thick floor slab supporting frame axial force monitoring system comprises a supporting frame 5 and an axial force monitoring device. The support frame is used for supporting the super-thick floor slab and is used for pouring the template of the super-thick floor slab.
The spacing between the supports is calculated according to the load of the concrete 11 on the lower floor, generally 600mm, that is, every 4 vertical poles form a 600mm square.
The template for pouring the super-thick floor slab comprises a side template 1 and a bottom template 2; the side formworks and the bottom formworks form a space for pouring floor slab concrete.
A main beam 4 and a secondary beam 3 are also arranged between the template for pouring the super-thick floor slab and the support frame; the secondary beam is arranged below the bottom template and used for supporting the template for pouring the super-thick floor slab; the main beam is arranged below the secondary beam and used for supporting the secondary beam. The support frame is installed below the main beam.
The template for pouring the super-thick floor slab is used for pouring concrete of a lower floor slab and concrete of an upper floor slab. The side templates are wood templates. The bottom template is a wood template. The secondary beam is a wood square secondary beam. The main beam is a steel main beam, and specifically can be a 10# I-steel main beam.
The axial force monitoring device is used for monitoring the axial force of the super-thick floor slab supporting frame. The axial force monitoring device comprises an adjustable jacking 6, a jack 7, an axial force sensing line 8 and a data acquisition instrument 9. The adjustable jacking is arranged at the top of the support frame to be monitored and below the main beam and used for supporting the main beam. The jack is arranged below the adjustable jacking in a tight or loose way; meanwhile, the jack is connected with the axial force sensing line, the axial force sensing line is connected with a data acquisition instrument arranged outside the support frame, and the data acquisition instrument is used for reading and measuring an axial force value.
The axial force monitoring device can be used for loading by tightly jacking the adjustable supporting top through adjusting the jack or unloading by loosening the adjustable supporting top through adjusting the jack.
With regard to the selection of the support rods to be monitored, it is common to choose the mid-span area of the concrete of the lower floor, i.e. in the center of the entire bracing frame area. Generally, 3-5 support rods are selected from the whole support frame area to be monitored.
The flow of the method for verifying the removal condition of the support frame of the super-thick floor slab is shown in figure 1. Specifically, the verification method comprises the following steps:
(1) installing the axial force monitoring system of the support frame of the super-thick floor slab;
(2) after the installation is finished, pouring lower floor slab concrete 10 in a template for pouring the super-thick floor slab;
(3) after the concrete of the lower floor is finally set, pouring the concrete 11 of the upper floor by taking the concrete of the lower floor as a template;
(4) the axial force monitoring device unloads by adjusting the jack, and reads and measures an axial force value on the data acquisition instrument while unloading;
(5) judging whether the support frame and the lower floor slab concrete bear the load of the upper floor slab concrete together through the axial force value; if the axial force value is not zero, the support frame still bears the load of the concrete of the upper floor, and the support frame cannot be detached; if the axial force value is zero, the support frame does not bear the load of the concrete of the upper floor, and the support frame can be detached.
The invention also provides a method for adjusting the concrete strength of the lower floor slab to completely bear the concrete of the upper floor slab. The flow of the method is shown in fig. 1. Specifically, the method comprises the following steps:
(a) installing the axial force monitoring system of the support frame of the super-thick floor slab;
(b) after the installation is finished, pouring concrete of the lower floor slab;
(c) after the concrete of the lower floor is finally set, pouring the concrete of the upper floor by taking the concrete of the lower floor as a template;
(d) the axial force monitoring device unloads by adjusting the jack, and reads and measures an axial force value on the data acquisition instrument while unloading;
(e) when the axial force value is not zero, the axial force monitoring device loads by adjusting the jack, waits for the strength of the concrete of the lower floor to increase along with the age of time, and returns to the step (d) once every 24 hours during the waiting period;
(f) and (e) repeating the steps (d) and (e) until the axial force value is zero, namely, the concrete strength of the lower floor can completely bear the concrete of the upper floor.
Through the support pole setting top installation axial force monitoring devices at the support frame of super thick floor, can accurately judge whether the support frame bears upper floor concrete to can in time demolish the support frame, reduce the waste of cost.
Examples
The removal condition of the support frame is verified by the flow shown in fig. 1.
(1) The super-thick floor support frame axial force monitoring system of the invention is installed as shown in fig. 2 and 3.
The template for pouring the super-thick floor slab comprises a side template and a bottom template; the side formworks and the bottom formworks form a space for pouring floor slab concrete. A batten secondary beam is arranged below the bottom template, and a 10# I-steel main beam is arranged below the batten secondary beam. The top of 5 support frames at the center of the whole support frame area and below the main beam are provided with adjustable jacking supports. The jack is arranged below the adjustable jacking in a tight or loose way; meanwhile, the jack is connected with the axial force sensing line, the axial force sensing line is connected with a data acquisition instrument arranged outside the support frame, and the data acquisition instrument is used for reading and measuring an axial force value.
The axial force monitoring device can be used for loading by tightly jacking the adjustable supporting top through adjusting the jack or unloading by loosening the adjustable supporting top through adjusting the jack.
(2) After the installation is finished, firstly, the jack is tightly jacked to the adjustable tray, and then, the concrete of the lower floor slab is poured in the formwork for pouring the super-thick floor slab.
(3) After 10 days, the concrete of the lower floor is finally set and reaches the compressive strength of 22.5 MPa. And pouring concrete of the upper floor by taking the lower concrete as a template. And (5) after the concrete pouring of the upper floor is finished for 3 days, implementing the step (4).
(4) The axial force monitoring device unloads by loosening the jack, and reads the axial force value on the data acquisition instrument while unloading;
(5) the result shows that the maximum axial force value is 160MPa, and the lower layer concrete floor slab can not completely support the load of the upper layer concrete floor slab. And (3) at the moment, the jack is used for jacking the adjustable tray again, the strength of the lower layer concrete is waited to be increased along with the age, then the step (4) is returned every 24h, the steps (4) and (5) are repeated until the maximum axial force value is 0, the lower layer concrete floor completely supports the load of the upper layer concrete floor, and the support frame can be detached.
The above description is for the purpose of describing the invention in more detail with reference to specific preferred embodiments, and it should not be construed that the embodiments are limited to those described herein, but rather that the invention is susceptible to various modifications and alternative forms without departing from the spirit and scope of the present invention.
Claims (10)
1. The super-thick floor slab supporting frame axial force monitoring system is characterized by comprising a supporting frame (5) and an axial force monitoring device; the axial force monitoring device is used for monitoring the axial force of the support frame; the support frame is used for supporting the ultra-thick floor slab and a template for pouring the ultra-thick floor slab;
the axial force monitoring device comprises an adjustable jacking (6), a jack (7), an axial force sensing line (8) and a data acquisition instrument (9); the adjustable jacking is arranged at the top of the support frame to be monitored; the jack is arranged below the adjustable supporting top and can tightly support or loosen the adjustable supporting top; meanwhile, the jack is connected with an axial force sensing line, the axial force sensing line is connected with a data acquisition instrument, and the data acquisition instrument is used for reading and measuring the axial force value of the support frame to be monitored; the axial force monitoring device can be used for loading or unloading by adjusting the jack.
2. The axial force monitoring system for the support frame of the super-thick floor slab as claimed in claim 1, wherein the formwork for casting the super-thick floor slab comprises a side formwork (1) and a bottom formwork (2); the side formworks (1) and the bottom formworks (2) form a space for pouring floor slab concrete.
3. The axial force monitoring system for the support frame of the super-thick floor slab as claimed in claim 2, wherein a main beam (4) and a secondary beam (3) are further included between the formwork for casting the super-thick floor slab and the support frame; the secondary beam (3) is arranged below the bottom template (2) and used for supporting the template for pouring the super-thick floor slab; the main beam (4) is arranged below the secondary beam (3) and used for supporting the secondary beam (3).
4. The system of claim 3, wherein the support is mounted below the main beam; the adjustable jacking is arranged at the top of the support frame and below the main beam.
5. The system of claim 1, wherein the data acquisition unit is mounted on the outside of the support.
6. A verification method for the removal condition of a support frame of an ultra-thick floor slab is characterized by comprising the following steps:
(1) installing the ultra-thick floor support frame axial force monitoring system of any one of claims 1-5;
(2) after the installation is finished, pouring concrete of a lower floor slab in a template for pouring the super-thick floor slab;
(3) after the concrete of the lower floor is finally set, pouring the concrete of the upper floor by taking the concrete of the lower floor as a template;
(4) the axial force monitoring device unloads by adjusting the jack, and reads and measures an axial force value on the data acquisition instrument while unloading;
(5) judging whether the support frame and the lower floor slab concrete bear the load of the upper floor slab concrete together through the axial force value; if the axial force value is not zero, the support frame still bears the load of the concrete of the upper floor, and the support frame cannot be detached; if the axial force value is zero, the support frame does not bear the load of the concrete of the upper floor, and the support frame can be detached.
7. The method for verifying removal conditions of support frames for super-thick floors as claimed in claim 6, wherein in the step (4), the axial force monitoring means is released by releasing the jack, and the axial force value is read on the data acquisition instrument while the axial force is released.
8. A method of adjusting the strength of concrete for a lower floor to fully carry concrete for an upper floor, comprising the steps of:
(a) installing the ultra-thick floor support frame axial force monitoring system of any one of claims 1-5;
(b) after the installation is finished, pouring concrete of a lower floor slab in a template for pouring the super-thick floor slab;
(c) after the concrete of the lower floor is finally set, pouring the concrete of the upper floor by taking the concrete of the lower floor as a template;
(d) the axial force monitoring device unloads by adjusting the jack, and reads and measures an axial force value on the data acquisition instrument while unloading;
(e) when the axial force value is not zero, the axial force monitoring device loads by adjusting the jack, waits for the strength of the concrete of the lower floor to increase along with the age of time, and returns to the step (d) periodically during the waiting period;
(f) and (e) repeating the steps (d) and (e) until the axial force value is zero, namely, the concrete strength of the lower floor can completely bear the concrete of the upper floor.
9. The method for adjusting the strength of concrete for lower floors as claimed in claim 8, wherein in the step (d), the axial force monitoring means is released by releasing the jack, and the axial force value is read on the data collecting device while the axial force is released.
10. The method of adjusting the strength of concrete for a lower floor to fully bear the concrete for an upper floor according to claim 8, wherein in step (e), said periodically returning to step (d) is to return to step (d) every 24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811635561.3A CN111397786A (en) | 2018-12-29 | 2018-12-29 | Super-thick floor slab support frame axial force monitoring system and method for verifying dismantling condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811635561.3A CN111397786A (en) | 2018-12-29 | 2018-12-29 | Super-thick floor slab support frame axial force monitoring system and method for verifying dismantling condition |
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| Publication Number | Publication Date |
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| CN111397786A true CN111397786A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811635561.3A Pending CN111397786A (en) | 2018-12-29 | 2018-12-29 | Super-thick floor slab support frame axial force monitoring system and method for verifying dismantling condition |
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| Country | Link |
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| CN (1) | CN111397786A (en) |
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2018
- 2018-12-29 CN CN201811635561.3A patent/CN111397786A/en active Pending
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