阅读说明：本技术 一种顶推梁监测控制施工方法 (Incremental launching beam monitoring and controlling construction method ) 是由 张时钟 邢云州 战鼎成 赵月亭 佟强 庞金波 王利民 李胜臣 于 2020-07-22 设计创作，主要内容包括：本发明涉及桥梁顶推施工技术领域,具体涉及一种顶推梁监测控制施工方法,包括以下步骤：步骤一：确定埋设混凝土应力计传感器的位置；步骤二：在顶推梁的梁体内部埋设混凝土应力计传感器,将混凝土应力计传感器与第一电缆的一端相连接,将第一电缆另一端伸出模板；步骤三：在模板内浇筑混凝土,形成顶推梁；步骤四：将第一电缆与采集装置相连接；步骤五：在顶推梁外表面安装粘贴式应力计传感器并与采集装置相连接；步骤六：将采集装置与读数装置相连接,实时监控采集得到的数据；由于安装了混凝土应力计传感器和粘贴式应力计传感器,实时监测顶推梁内部及外表面应力值,避免顶推梁在预制及顶推的过程中发生开裂,保证施工质量及安全。(The invention relates to the technical field of bridge pushing construction, in particular to a pushing beam monitoring control construction method, which comprises the following steps: the method comprises the following steps: determining the position of a sensor for embedding the concrete stressometer; step two: embedding a concrete stress meter sensor in the beam body of the pushing beam, connecting the concrete stress meter sensor with one end of a first cable, and extending the other end of the first cable out of the template; step three: pouring concrete in the template to form a pushing beam; step four: connecting a first cable with the acquisition device; step five: a sticking type stress meter sensor is arranged on the outer surface of the pushing beam and is connected with the collecting device; step six: connecting the acquisition device with a reading device, and monitoring acquired data in real time; because the concrete stress meter sensor and the sticking type stress meter sensor are installed, the stress values of the inner surface and the outer surface of the pushing beam are monitored in real time, the pushing beam is prevented from cracking in the prefabricating and pushing processes, and the construction quality and safety are ensured.)

1. A pushing beam monitoring control construction method is characterized by comprising the following steps:

the method comprises the following steps: determining the position of a sensor for embedding the concrete stressometer;

step two: embedding a concrete stress meter sensor in the beam body of the pushing beam, connecting the concrete stress meter sensor with one end of a first cable, and extending the other end of the first cable out of the template;

step three: pouring concrete in the formwork to form the pushing beam;

step four: connecting the first cable with an acquisition device;

step five: mounting a sticking type stress meter sensor on the outer surface of the pushing beam, and connecting the sticking type stress meter sensor with the acquisition device through a second cable;

step six: and connecting the acquisition device with a reading device, and monitoring acquired data in real time.

2. The jacking beam monitoring and controlling construction method according to claim 1, wherein the concrete stress meter sensor and the adhesive stress meter sensor transmit frequencies through cables, and the frequencies record information of internal stress, temperature and deformation of the jacking beam.

3. The incremental launching beam monitoring and control construction method as claimed in claim 1, wherein the acquisition device is a vibrating wire detector.

4. The incremental launching beam monitoring and control construction method as claimed in claim 1, further comprising the seventh step of: and arranging a prism on the outer surface of the pushing beam, and monitoring the transverse deviation and the pushing distance of the pushing beam by using a total station in a matching manner.

5. The incremental launching beam monitoring and control construction method as claimed in claim 4, further comprising the steps of: and installing a digital displacement sensor at the top of the pushing beam, connecting the digital displacement sensor with a digital displacement measuring instrument, and monitoring the longitudinal deviation of the pushing beam.

6. The jacking beam monitoring and controlling construction method according to claim 1, wherein in the first step, a spatial calculation model is established to simulate the whole process from jacking to bridging, and the position of the jacking beam where a concrete stress gauge sensor needs to be embedded is determined.

7. The incremental launching beam monitoring and control construction method as claimed in claim 6, wherein a beam lattice method is adopted for simulation calculation to establish a spatial calculation model.

Technical Field

The invention relates to the technical field of bridge incremental launching construction, in particular to an incremental launching beam monitoring and controlling construction method.

Background

In the concrete beam pushing construction, the pushing beam usually cracks due to overlarge internal stress of the beam body during prefabrication and pushing, the traditional control method is controlled by means of specifications and experiences of technicians and constructors, but the artificial control range is limited and is not accurate and fine, so that the structure of the pushing beam is influenced, and the construction is inconvenient.

Disclosure of Invention

The invention aims to: the method for monitoring and controlling the pushing beam aims at the problems that in the prior art, the pushing beam is usually cracked due to overlarge internal stress of the beam during prefabrication and pushing, the control range is limited and the pushing beam is not accurate and fine due to the fact that the pushing beam is controlled by the aid of specifications and experiences of technicians and constructors.

In order to achieve the purpose, the invention adopts the technical scheme that:

a pushing beam monitoring control construction method comprises the following steps:

the method comprises the following steps: determining the position of a sensor for embedding the concrete stressometer;

step two: embedding a concrete stress meter sensor in the beam body of the pushing beam, connecting the concrete stress meter sensor with one end of a first cable, and extending the other end of the first cable out of the template;

step three: pouring concrete in the formwork to form the pushing beam;

step four: connecting the first cable with an acquisition device;

step five: mounting a sticking type stress meter sensor on the outer surface of the pushing beam, and connecting the sticking type stress meter sensor with the acquisition device through a second cable;

step six: and connecting the acquisition device with a reading device, and monitoring acquired data in real time.

Because the concrete stressometer sensor is pre-embedded in the pushing beam, the sticking stressometer sensor is installed on the outer surface of the pushing beam, the stress values measured by the concrete stressometer sensor and the sticking stressometer sensor are more accurate than those manually estimated, so that the stress values measured by the concrete stressometer sensor and the sticking stressometer sensor in the prefabricating process and the pushing process of the pushing beam can be monitored, the stress value of the concrete stressometer sensor at the embedding position and the stress value of the sticking stressometer sensor at the installing position are controlled when the pushing beam is prefabricated, measures are taken to adjust the pushing beam in time when the stress value of a certain position is overlarge in the pushing process, the cracking of the pushing beam is avoided, the stress values in the pushing beam and the outer surface are ensured to be smaller than the design value, the construction quality and safety are ensured, when the stress value is monitored to be overlarge, can discover in time and make the adjustment, improve work efficiency by a wide margin.

As a preferred embodiment of the present invention, the collecting device may be a collecting box, the reading device may be a computer, and relevant conditions inside and outside the pushing beam, including stress, temperature, etc., may be controlled in real time by guiding data collected in the collecting box to the computer.

In a preferred embodiment of the present invention, the concrete stress meter sensor and the adhesive type stress meter sensor transmit frequencies through cables, and the frequencies record information of internal stress, temperature, and deformation of the incremental launching beam.

The concrete stress meter sensor comprises a back plate, an induction plate, a vibrating wire and an electromagnetic coil, wherein when the internal stress of the beam body changes, the induction plate synchronously senses the change of the stress, the induction plate deforms, and the vibrating wire is transformed into the change of the stress of the vibrating wire, so that the vibration frequency of the vibrating wire is changed. The electromagnetic coil excites the vibrating wire and measures the vibration frequency of the vibrating wire, and the frequency signal is transmitted to the collecting device through the cable, so that the compressive stress value of the embedded point can be measured, and meanwhile, the temperature value of the embedded point can be synchronously measured.

As a preferable scheme of the invention, the acquisition device is a vibrating wire detector.

As a preferable scheme of the invention, the type of the vibrating wire detector is JMZX3001 type vibrating wire detector.

As a preferable scheme of the invention, the method further comprises the following steps: and arranging a prism on the outer surface of the pushing beam, and monitoring the transverse deviation and the pushing distance of the pushing beam by using a total station in a matching manner.

When the prism is used as a reflector for distance measurement, the total station sends out an optical signal, receives the optical signal reflected by the prism, calculates the phase shift of the optical signal and the like, so as to indirectly obtain the time of light passing, and finally measures the distance from the total station to the prism, thereby judging whether the pushing beam deviates and the pushing distance thereof.

As a preferable embodiment of the present invention, the method further comprises the step eight: and installing a digital displacement sensor at the top of the pushing beam, connecting the digital displacement sensor with a digital displacement measuring instrument, and monitoring the longitudinal deviation of the pushing beam.

As a preferable scheme of the invention, in the first step, a spatial calculation model is established, the whole process from the pushing to the bridging is simulated, and the position of the pushing beam where the concrete stress meter sensor needs to be embedded is determined.

As a preferred scheme of the invention, a beam lattice method is adopted to carry out simulation calculation to establish a space calculation model.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

because the concrete stressometer sensor is pre-embedded in the pushing beam, the sticking stressometer sensor is installed on the outer surface of the pushing beam, the stress values measured by the concrete stressometer sensor and the sticking stressometer sensor are more accurate than those manually estimated, so that the stress values measured by the concrete stressometer sensor and the sticking stressometer sensor in the prefabricating process and the pushing process of the pushing beam can be monitored, the stress value of the concrete stressometer sensor at the embedding position and the stress value of the sticking stressometer sensor at the installing position are controlled when the pushing beam is prefabricated, measures are taken to adjust the pushing beam in time when the stress value of a certain position is overlarge in the pushing process, the cracking of the pushing beam is avoided, the stress values in the pushing beam and the outer surface are ensured to be smaller than the design value, the construction quality and safety are ensured, when the stress value is monitored to be overlarge, can discover in time and make the adjustment, improve work efficiency by a wide margin.

Drawings

FIG. 1 is a flow chart of a pushing beam monitoring and control construction method according to the present invention.

FIG. 2 is a cross-sectional view of the pushing beam of the invention at the position where the concrete stressometer sensor is embedded.

Icon: 1-pushing the beam; 2-concrete stress meter sensor.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.