CN112230690A - Mass concrete construction quality control method for pier-beam consolidation part of high-pier large-span bridge - Google Patents
Mass concrete construction quality control method for pier-beam consolidation part of high-pier large-span bridge Download PDFInfo
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- CN112230690A CN112230690A CN202011034742.8A CN202011034742A CN112230690A CN 112230690 A CN112230690 A CN 112230690A CN 202011034742 A CN202011034742 A CN 202011034742A CN 112230690 A CN112230690 A CN 112230690A
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- temperature sensor
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
- G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
- G05D23/1932—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of a plurality of spaces
- G05D23/1934—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of a plurality of spaces each space being provided with one sensor acting on one or more control means
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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
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- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The embodiment of the disclosure provides a method for controlling the construction quality of mass concrete at a consolidation part of a high-pier large-span bridge pier beam. The method disclosed by the embodiment of the invention can be used for uniformly controlling the temperature in the whole construction process of pouring and hardening, and particularly can be used for effectively controlling the temperature reduction speed and effectively ensuring the construction quality in the cooling stage during hardening.
Description
Technical Field
The disclosure relates to the technical field of bridge construction engineering equipment, in particular to a mass concrete construction quality control method for a pier-beam consolidation part of a high-pier long-span bridge.
Background
The pier-beam consolidation part is a key force transmission node of a main pier and a main beam of the T-shaped rigid frame bridge, and the construction quality control of the pier-beam consolidation part is one of key technologies for building the high-pier large-span T-frame bridge. However, the structure is complex, the arrangement of the steel bars is extremely dense, and the pouring volume of the concrete is overlarge, so that the control of the construction quality of the mass concrete at the pier-beam consolidation part is necessary and necessary for ensuring the quality of the full-bridge engineering.
The national standard "large-volume concrete construction code" (GB50496-2009) states that large-volume concrete with the minimum geometric dimension of concrete structure entity not less than 1m or concrete which is expected to cause harmful crack generation due to temperature change and shrinkage caused by hydration of cementing materials in the concrete is called large-volume concrete. The large-volume concrete is widely applied to large-scale basic engineering such as building engineering, bridge engineering, hydraulic engineering and the like.
Hydration heat can be released in the concrete solidification process, so that the concrete is heated, and if the temperature difference between the inside and the outside of the concrete is large, the concrete can generate temperature cracks, so that the structural safety and the normal use are influenced. For this reason, the American Concrete Institute (ACI) specifies: "any in-place poured mass concrete, which is large in size, must address the heat of hydration and the consequent volumetric deformation to minimize cracking".
Generally, the temperature change in the construction process of mass concrete has the following rule:
1. in the pouring process, the temperature of the concrete just poured on the upper part does not start to rise, only the concrete poured on the lower part starts to release heat, and the temperature tends to continuously rise.
2. After pouring is finished, the temperature is in a continuous rising trend, reaches the highest value in about 3-5 days, then begins to be cooled, and the temperature is not required to be controlled after about 15 days.
At present, the temperature control method adopted in the prior art is to bury heat dissipation materials such as water pipes in concrete, but the method has the following disadvantages:
1. cooling is turned on when cooling should not be done. For example, during casting, the concrete has not yet begun to warm up and has already begun to cool.
2. After the cooling is started, the cooling cannot be stopped in time. For example, during casting, the temperature of the concrete has already decreased and cooling has not stopped in time.
3. The temperature drops too quickly due to excessive continuous cooling during the temperature drop.
If the temperature control is not good, the product quality can be influenced, and great potential safety hazards exist. Once the internal temperature exceeds 75 ℃, the construction is unqualified.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide a method for controlling the construction quality of mass concrete at a high-pier large-span bridge pier-beam consolidation portion, which at least partially solves the problems in the prior art.
In a first aspect, an embodiment of the present disclosure provides a method for controlling quality of mass concrete construction at a high-pier large-span bridge pier-girder consolidation part, where the method for controlling quality of mass concrete construction at the high-pier large-span bridge pier-girder consolidation part includes:
before construction, cooling pipelines are distributed in large-volume concrete in a construction body in a layered and staggered manner according to the construction height, a water inlet pipe and a water outlet pipe are externally connected to a concrete structure, and the distance between every two layers is 50-100 cm; a first temperature sensor is arranged in each layer of cooling pipeline at preset intervals, and the plurality of first temperature sensors are connected with a central controller;
before the construction of the mass concrete, arranging a second temperature sensor group in each area of the mass concrete, wherein the second temperature sensor group is arranged in the central area of the concrete, the second temperature sensor group is arranged in the edge area of the concrete, and the second temperature sensor group is arranged in the middle of the central area and the edge area; the plurality of second temperature sensor groups are connected with the central controller;
the central controller issues a temperature signal acquisition instruction to the first temperature sensor group and the second temperature sensor group, and the first temperature sensor group and the second temperature sensor group start to acquire temperature after receiving the instruction;
the central controller collects temperature parameters of the second temperature sensor group, when the temperature parameters collected by the second temperature sensor group are higher than a preset value, the valve at the position of the water inlet pipe corresponding to the cooling pipeline corresponding to the position control received by the mark is opened, the water tank is controlled to be opened, cooling water is introduced into the corresponding water inlet pipe, the temperature in the current pipe is collected by the first temperature sensor in the corresponding cooling pipeline under the control, the temperature parameters collected by the first temperature sensor and the temperature parameters collected by the second temperature sensor group are compared, and when the temperature difference is higher than the preset value, a preset amount of freezing agent is added into the cooling water tank.
According to a specific implementation manner of the embodiment of the disclosure, the method for controlling the construction quality of the mass concrete at the consolidation part of the pier and the girder of the high-pier long-span bridge further comprises the following steps: the central controller issues a temperature signal acquisition command to the first temperature sensor group and the second temperature sensor group, the second temperature sensor group starts to acquire temperature after receiving the command, and the first temperature sensor starts to acquire the temperature in the cooling pipeline after the second temperature sensor group finishes acquiring the temperature in the pipe.
According to a specific implementation of the embodiments of the present disclosure, the second set of temperature sensors is arranged around the cooling circuit.
According to a specific implementation manner of the embodiment of the present disclosure, the second temperature sensor group includes a plurality of temperature sensors, and the plurality of temperature sensors are respectively disposed in four directions of the circumferential section of the cooling pipeline.
According to a specific implementation manner of the embodiment of the disclosure, the construction body is a pier-beam consolidation part of a high-pier large-span T-structure bridge.
In the embodiment of the present disclosure, the method for controlling the construction quality of the mass concrete at the pier-girder consolidation of the high-pier long-span bridge comprises the following steps:
before construction, cooling pipelines are distributed in large-volume concrete in a construction body in a layered and staggered manner according to the construction height, a water inlet pipe and a water outlet pipe are externally connected to a concrete structure, and the distance between every two layers is 50-100 cm; a first temperature sensor is arranged in each layer of cooling pipeline at preset intervals, and the plurality of first temperature sensors are connected with a central controller;
before the construction of the mass concrete, arranging a second temperature sensor group in each area of the mass concrete, wherein the second temperature sensor group is arranged in the central area of the concrete, the second temperature sensor group is arranged in the edge area of the concrete, and the second temperature sensor group is arranged in the middle of the central area and the edge area; the plurality of second temperature sensor groups are connected with the central controller;
the central controller issues a temperature signal acquisition instruction to the first temperature sensor group and the second temperature sensor group, and the first temperature sensor group and the second temperature sensor group start to acquire temperature after receiving the instruction;
the central controller collects temperature parameters of the second temperature sensor group, when the temperature parameters collected by the second temperature sensor group are higher than a preset value, the valve at the position of the water inlet pipe corresponding to the cooling pipeline corresponding to the position control received by the mark is opened, the water tank is controlled to be opened, cooling water is introduced into the corresponding water inlet pipe, the temperature in the current pipe is collected by the first temperature sensor in the corresponding cooling pipeline under the control, the temperature parameters collected by the first temperature sensor and the temperature parameters collected by the second temperature sensor group are compared, and when the temperature difference is higher than the preset value, a preset amount of freezing agent is added into the cooling water tank.
The method disclosed by the embodiment of the invention can be used for uniformly controlling the temperature in the whole construction process of pouring and hardening, and particularly can be used for effectively controlling the temperature reduction speed and effectively ensuring the construction quality in the cooling stage during hardening.
Detailed Description
The embodiments of the present disclosure are described in detail below.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the disclosure provides a method for controlling the construction quality of mass concrete at a pier-girder consolidation part of a high-pier large-span bridge.
The mass concrete construction quality control method for the high-pier long-span bridge pier-girder consolidation part comprises the following steps:
before construction, cooling pipelines are distributed in large-volume concrete in a construction body in a layered and staggered manner according to the construction height, a water inlet pipe and a water outlet pipe are externally connected to a concrete structure, and the distance between every two layers is 50-100 cm; a first temperature sensor is arranged in each layer of cooling pipeline at preset intervals, and the plurality of first temperature sensors are connected with a central controller;
before the construction of the mass concrete, arranging a second temperature sensor group in each area of the mass concrete, wherein the second temperature sensor group is arranged in the central area of the concrete, the second temperature sensor group is arranged in the edge area of the concrete, and the second temperature sensor group is arranged in the middle of the central area and the edge area; the plurality of second temperature sensor groups are connected with the central controller;
the central controller issues a temperature signal acquisition instruction to the first temperature sensor group and the second temperature sensor group, and the first temperature sensor group and the second temperature sensor group start to acquire temperature after receiving the instruction;
the central controller collects temperature parameters of the second temperature sensor group, when the temperature parameters collected by the second temperature sensor group are higher than a preset value, the valve at the position of the water inlet pipe corresponding to the cooling pipeline corresponding to the position control received by the mark is opened, the water tank is controlled to be opened, cooling water is introduced into the corresponding water inlet pipe, the temperature in the current pipe is collected by the first temperature sensor in the corresponding cooling pipeline under the control, the temperature parameters collected by the first temperature sensor and the temperature parameters collected by the second temperature sensor group are compared, and when the temperature difference is higher than the preset value, a preset amount of freezing agent is added into the cooling water tank.
Further, the method for controlling the construction quality of the mass concrete at the consolidation part of the pier and the girder of the high-pier long-span bridge further comprises the following steps: the central controller issues a temperature signal acquisition command to the first temperature sensor group and the second temperature sensor group, the second temperature sensor group starts to acquire temperature after receiving the command, and the first temperature sensor starts to acquire the temperature in the cooling pipeline after the second temperature sensor group finishes acquiring the temperature in the pipe.
Further, a second set of temperature sensors is arranged around the cooling circuit.
Further, the second temperature sensor group includes a plurality of temperature sensors respectively disposed in four directions of the circumferential section of the cooling line.
The monitoring of the concrete construction quality is carried out in the pier-beam consolidation of the high-pier large-span T-structure bridge. According to the construction quality control method for the mass concrete at the pier-beam consolidation part of the high-pier large-span bridge, before construction, cooling pipelines are distributed in the mass concrete in a construction body in a layered and staggered mode according to the construction height, a water inlet pipe and a water outlet pipe are externally connected to a concrete structure, and the interval between every two layers is 50-100 cm; a first temperature sensor is arranged in each layer of cooling pipeline at preset intervals, and the plurality of first temperature sensors are connected with a central controller; the purpose of installing the first temperature sensor in the cooling line is to detect the temperature in the line by means of the first temperature sensor. In addition, a second temperature sensor group is arranged in each area of the large-volume concrete, the second temperature sensor group is arranged around the cooling pipeline, specifically, the second temperature sensor group is arranged around four directions of the circumferential section of the cooling pipeline and arranged in the upper direction, the lower direction, the left direction and the right direction of the cooling pipeline, so that the arrangement mode is adopted, the temperature condition around the cooling pipeline is mainly detected through the second temperature sensor, generally, the temperature around the cooling water pipe is reduced faster relative to other positions, and the frequency of water passing through the cooling pipeline and the condition of refrigerant passing through the cooling water are controlled by monitoring the temperature around the cooling pipeline.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (5)
1. The method for controlling the construction quality of the mass concrete at the pier-girder consolidation part of the high-pier long-span bridge is characterized by comprising the following steps of:
before construction, cooling pipelines are distributed in large-volume concrete in a construction body in a layered and staggered manner according to the construction height, a water inlet pipe and a water outlet pipe are externally connected to a concrete structure, and the distance between every two layers is 50-100 cm; a first temperature sensor is arranged in each layer of cooling pipeline at preset intervals, and the plurality of first temperature sensors are connected with a central controller;
before the construction of the mass concrete, arranging a second temperature sensor group in each area of the mass concrete, wherein the second temperature sensor group is arranged in the central area of the concrete, the second temperature sensor group is arranged in the edge area of the concrete, and the second temperature sensor group is arranged in the middle of the central area and the edge area; the plurality of second temperature sensor groups are connected with the central controller;
the central controller issues a temperature signal acquisition instruction to the first temperature sensor group and the second temperature sensor group, and the first temperature sensor group and the second temperature sensor group start to acquire temperature after receiving the instruction;
the central controller collects temperature parameters of the second temperature sensor group, when the temperature parameters collected by the second temperature sensor group are higher than a preset value, the valve at the position of the water inlet pipe corresponding to the cooling pipeline corresponding to the position control received by the mark is opened, the water tank is controlled to be opened, cooling water is introduced into the corresponding water inlet pipe, the temperature in the current pipe is collected by the first temperature sensor in the corresponding cooling pipeline under the control, the temperature parameters collected by the first temperature sensor and the temperature parameters collected by the second temperature sensor group are compared, and when the temperature difference is higher than the preset value, a preset amount of freezing agent is added into the cooling water tank.
2. The method for controlling the construction quality of the large-volume concrete at the high-pier large-span bridge pier-girder consolidation part according to claim 1, further comprising: the central controller issues a temperature signal acquisition command to the first temperature sensor group and the second temperature sensor group, the second temperature sensor group starts to acquire temperature after receiving the command, and the first temperature sensor starts to acquire the temperature in the cooling pipeline after the second temperature sensor group finishes acquiring the temperature in the pipe.
3. The method for controlling the construction quality of the mass concrete at the consolidation part of the pier and the girder of the high-pier large-span bridge according to claim 1, wherein the second temperature sensor group is arranged around the cooling pipeline.
4. The method for controlling the construction quality of the mass concrete at the consolidation part of the pier and the girder of the high-pier large-span bridge according to claim 3, wherein the second temperature sensor group comprises a plurality of temperature sensors, and the plurality of temperature sensors are respectively arranged in four directions of the circumferential section of the cooling pipeline.
5. The method for controlling the construction quality of the mass concrete at the pier-beam consolidation part of the high-pier large-span bridge according to claim 2, wherein the construction body is the pier-beam consolidation part of the high-pier large-span T-structure bridge.
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| CN202011034742.8A CN112230690A (en) | 2020-09-27 | 2020-09-27 | Mass concrete construction quality control method for pier-beam consolidation part of high-pier large-span bridge |
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| CN202011034742.8A CN112230690A (en) | 2020-09-27 | 2020-09-27 | Mass concrete construction quality control method for pier-beam consolidation part of high-pier large-span bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276164A (en) * | 2022-01-04 | 2022-04-05 | 北京市市政一建设工程有限责任公司 | Bridge substructure concrete hydration heat release device |
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Application publication date: 20210115 |