1. The real-time monitoring and control integrated method for the cantilever pouring construction is characterized in that a construction monitoring and control device corresponding to the method comprises a strain gauge (1), a concrete flow monitoring meter (2), a concrete pump (3) and a concrete distributor (4), and the method comprises the following construction steps:

s1: mounting strain gauge (1): installing a cantilever casting hanging basket structure (5) on a cast beam body, and installing strain gauges (1) on all stress hanging strips in the hanging basket casting structure (5), wherein the strain gauges comprise a front hanging strip, a bottom rear hanging rod, a sliding beam front hanging rod, a guide rail front fulcrum, a sliding beam rear hanging rod and a rear hanging rod;

s2: installing a concrete flow monitoring meter (2): the concrete spreader (4) is arranged at the front end of the poured beam surface, the concrete flow monitor (2) is arranged at the tail end of a hard transmission pipe (6) at the front end of the concrete spreader (4), namely the root of a rubber hose (7), and the concrete flow monitor (2) can be ensured to stably read data;

s3: and (3) construction control of the concrete flow monitoring meter (2): in the symmetrical pouring process of the cantilever T-shaped structures, the pouring speed and the pouring total amount of the T-shaped structures at two ends are judged by displaying data through the control box, if the data show that the single-side pouring is too fast or too slow, the pumping pressure of the concrete pump (3) is properly adjusted, and the flowing speed and the pouring total amount of the concrete are stabilized to the same level;

s4: and (2) construction control of the strain gauge (1): the internal force of each suspender and the concrete gravity condition borne by the suspender are analyzed through the data displayed by the collection box, the collection box judges the safety and stability of the cradle structure (5) according to the internal force condition, the alarm is automatically given when the alarm value is reached, and the concrete gravity is collected to judge the balance condition of the T structure and is used as the basis for adjusting the pumping speed of the concrete pump (3);

s5: the method comprises the steps that analysis data of a strain gauge (1) and a concrete flow monitoring meter (2) are comprehensively considered by a collection box, the analysis data are led into control equipment of a concrete pump (3) in real time, the concrete volume difference values on two sides of a cantilever T-shaped structure are automatically calculated, the pumping capacity and the pumping speed of the concrete pump (3) are controlled through the control equipment, the actual pouring volume difference values are obtained through data inverse calculation of the concrete flow monitoring meter (2), and through the data processing and feedback of the series of data, the automatic control of symmetrical pouring of the cantilever T-shaped structure is realized.

Background

When the cantilever T structure of the continuous beam bridge is poured, unbalanced weights on two sides need to be reduced as much as possible to ensure balance and stability of beam ends on two sides, so that the requirement on concrete pouring construction control is high, and the square difference range is not easy to judge; when a traditional cantilever T structure is poured, weighing equipment such as a weighbridge is usually adopted to read the entering weight and the leaving weight of a concrete pump truck, the poured concrete square amount of the concrete is calculated according to the read data, certain accumulated errors may exist during pouring and in each stage, the stress of a continuous beam may deviate from the design stress, the concrete supply delay is high, the construction control difficulty is large, the whole truck can be controlled and adjusted, the error amount is judged through the experience of workers in the pouring process, and the deviation from the ideal value of a design box in the construction process or in a bridge forming state may be caused.

Disclosure of Invention

In order to overcome the technical defect that the square amount is difficult to control in the symmetrical pouring construction process in the prior art, the invention provides a real-time monitoring and control integrated method for cantilever pouring construction.

The invention realizes the aim through the following technical scheme, and a real-time monitoring and control integrated method for the cast-in-place construction of a cantilever is provided.

The method comprises the following construction steps:

s1: installing a strain gauge: mounting a cantilever casting hanging basket structure on a cast beam body, and mounting strain gauges on all stress hanging strips in the hanging basket casting structure, wherein the strain gauges comprise a front hanging strip, a bottom rear hanging rod, a sliding beam front hanging rod, a guide rail front fulcrum, a sliding beam rear hanging rod and a rear hanging rod;

s2: installing a concrete flow monitoring meter: the concrete spreader is arranged at the front end of the poured beam surface, and the concrete flow monitor is arranged at the tail end of a hard transmission pipe at the front end of the concrete spreader, namely the root of a rubber hose, so that the concrete flow monitor can stably read data;

s3: and (3) construction control of the concrete flow monitoring meter: in the symmetrical pouring process of the cantilever T-shaped structures, the pouring speed and the pouring total amount of the T-shaped structures at two ends are judged by displaying data through the control box, if the data show that the single-side pouring is too fast or too slow, the pumping pressure of a concrete pump is properly adjusted, and the flowing speed and the pouring total amount of the concrete are stabilized to the same level;

s4: and (3) construction control of the strain gauge: the internal force of each suspender and the concrete gravity condition borne by the suspender are analyzed through the data displayed by the collection box, the collection box judges the safety and stability of the cradle structure according to the internal force condition, the alarm is automatically given when the alarm value is reached, and the concrete gravity is collected to judge the balance condition of the T-shaped structure and is used as the basis for adjusting the pumping speed of the concrete ground pump;

s5: the collecting box comprehensively considers the analysis data of the strain gauge and the concrete flow monitoring meter, the analysis data are led into the control equipment of the concrete pump in real time, the concrete volume difference value of the two sides of the T-shaped structure of the cantilever is automatically calculated, the pumping capacity and the pumping speed of the concrete pump are controlled through the control equipment, the actual pouring volume difference value is obtained through the data back calculation of the concrete flow monitoring meter, and the automatic control of the symmetrical pouring of the T-shaped structure of the cantilever is realized through the data processing and feedback.

Generally, compared with the prior art, the technical scheme of the invention can achieve the following beneficial effects:

1. according to the real-time monitoring and control integrated method for the cantilever pouring construction, stress strain values of hanging baskets, hanging rods are directly read, load values on two sides of a cantilever T structure are accurately analyzed from a stress source, real-time control of loads on two sides is achieved by adjusting the concrete pouring square amount, and the method is simple to operate and high in pertinence;

2. the method and the device reversely calculate the adjusted concrete volume value through the concrete flow monitoring meter, provide secondary guarantee for controlling the concrete pouring volume, and have intuitive feedback and strong stability;

3. according to the invention, the stress state of each member of the hanging basket is monitored in real time by comparing and analyzing the strain measured value and the theoretical calculated value of each rod piece of the hanging basket, and the concrete pouring whole-process automatic control is realized by additionally adding data processing and control equipment, so that the automation degree is high and the error is small.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

FIG. 1 is a cross-sectional view of a cantilever casting hanging basket structure and a strain gauge arrangement schematic diagram;

FIG. 2 is a longitudinal section view of a cantilever casting hanging basket structure and a schematic layout view of a concrete flow monitoring meter;

in the figure: the concrete flow monitoring system comprises 1-strain gauge, 2-concrete flow monitor, 3-concrete ground pump, 4-concrete spreader, 5-hanging basket structure, 6-rigid transmission pipe and 7-rubber hose.

Detailed Description

A real-time monitoring and control integrated method for the cast-in-place construction of a cantilever is disclosed, the construction monitoring and control device corresponding to the method comprises a strain gauge 1, a concrete flow monitor 2, a concrete pump 3 and a concrete spreader 4, and the method comprises the following construction steps:

the method comprises the following steps: installing a strain gauge 1: installing a cantilever casting hanging basket structure 5 on a cast beam body, installing strain gauges 1 on all stress hanging strips in the hanging basket casting structure 5, wherein the strain gauges 1 comprise front hanging strips, bottom rear hanging rods, sliding beam front hanging rods, guide rail front fulcrums, sliding beam rear hanging rods and rear hanging rods, and the schematic layout of the strain gauges 1 in the cantilever casting hanging basket structure 5 is shown in figure 1;

step two: installing a concrete flow monitoring meter 2: installing a concrete spreader 4 at the front end of a poured beam surface, and installing a concrete flow monitor 2 at the tail end of a hard transmission pipe 6 at the front end of the concrete spreader 4, namely the root of a rubber hose 7, so as to ensure that the concrete flow monitor 2 can stably read data, wherein the schematic layout of the concrete flow monitor 2 in the cantilever pouring basket structure 5 is shown in fig. 2;

step three: and (3) construction control of the concrete flow monitor 2: in the symmetrical pouring process of the cantilever T-shaped structures, the pouring speed and the pouring total amount of the T-shaped structures at two ends are judged by displaying data through the control box, if the data show that the single-side pouring is too fast or too slow, the pumping pressure of the concrete pump 3 is properly adjusted, and the flowing speed and the pouring total amount of the concrete are stabilized to the same level;

step four: construction control of the strain gauge 1: the internal force of each suspender and the concrete gravity condition borne by the suspender are analyzed through the data displayed by the collection box, the collection box judges the safety and stability of the cradle structure 5 according to the internal force condition, the alarm is automatically given when the alarm value is reached, and the concrete gravity is collected to judge the balance condition of the T structure and is used as the basis for adjusting the pumping speed of the concrete pump 3;

step five: the collecting box comprehensively considers the analysis data of the strain gauge 1 and the concrete flow monitoring meter 2, the analysis data are led into the control equipment of the concrete pump 3 in real time, the concrete volume difference value of the two sides of the cantilever T-shaped structure is automatically calculated, the pumping capacity and the pumping speed of the concrete pump 3 are controlled through the control equipment, the actual casting volume difference value is obtained through the data back calculation of the concrete flow monitoring meter 2, and the automatic control of the symmetrical casting of the cantilever T-shaped structure is realized through the data processing and feedback of the above series of data

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.