阅读说明：本技术 一种游乐项目大体积混凝土浇筑降温施工方法 (Large-volume concrete pouring and cooling construction method for amusement project ) 是由 赵腾飞 苏秀 刘阳 刘帅 于 2020-12-08 设计创作，主要内容包括：本发明公开了一种游乐项目大体积混凝土浇筑降温施工方法,混凝土内部布置循环降温冷凝管并通以循环水的方式来降低混凝土内部温度,能够快速有效的降低混凝土内部产生的水化热,减小混凝土内外温差；采用循环水降低混凝土内部温度,取材简单,用料方便,降温效果较佳,且通过控制循环水的流速,从而便于控制混凝土的降温速度,能够最大限度地减少混凝土裂缝,确保大体积混凝土的施工质量。(The invention discloses a construction method for casting and cooling large-volume concrete of an amusement project, wherein a circulating cooling condenser pipe is arranged in the concrete, and the internal temperature of the concrete is reduced in a circulating water mode, so that the hydration heat generated in the concrete can be quickly and effectively reduced, and the internal and external temperature difference of the concrete is reduced; the circulating water is adopted to reduce the internal temperature of the concrete, the materials are simple to obtain, the materials are convenient to use, the cooling effect is better, and the flow rate of the circulating water is controlled, so that the cooling speed of the concrete is convenient to control, concrete cracks can be reduced to the greatest extent, and the construction quality of the large-volume concrete is ensured.)

1. A construction method for casting and cooling large-volume concrete for amusement projects is characterized by comprising the following steps: the method comprises the following steps: step a, laying of a condensation pipe: according to the size of a bearing platform, sequentially arranging a plurality of condenser pipe plane layer units on the bearing platform from top to bottom, wherein each condenser pipe plane layer unit comprises a plurality of rectangular condenser pipes; step b, connecting the condenser pipe with the steel bars of the bearing platform: the condenser pipe in the step a is firmly fixed with the bearing platform steel bars through the threaded suspension wires up and down; step c, controlling the water quantity of the condensation pipe: after the condenser pipe and the bearing platform steel bar in the step b are firmly fixed, the inlet of the condenser pipe is connected with a nearby water faucet through a hose and a first valve, the water injection amount is controlled through the first valve, water is naturally circulated and cooled, the outlet of the condenser pipe is connected with an external water tank through the hose and a second valve, and a first valve and a second valve are respectively arranged at the water inlet and the water outlet of the condenser pipe so as to control the water inlet direction and the flow rate; d, operation of a condensation pipe: c, after the condensate pipe in the step c is installed, water is required to be introduced for trial operation, and the sealing condition of the water pipe is checked; after the concrete pouring construction is finished, water starts to flow through for water circulation after initial setting, and a specially-assigned person is sent to take supervision to prevent pipe blockage; and arranging a specially-assigned person at the water inlet and outlet for measuring the temperature, recording for 1 time every 2 hours, stopping the circulation of condensed water after the temperature difference between the inside and the outside of concrete is stable after the concrete is poured for 10 days, and grouting and plugging the inlet and the outlet of the condensation pipe after the use is finished to cut off the exposed part.

2. The construction method for casting and cooling the large-volume concrete of the amusement project according to claim 1, wherein the construction method comprises the following steps: the condensation pipe in the steps a to c adopts a GDJ iron pipe with the inner diameter phi of 32mm and the wall thickness of 1.5mm, the end of the condensation pipe is tapped, the condensation pipe is a rectangular condensation pipe formed by a bent pipe joint and a straight pipe joint, and a 90-degree threaded connection elbow is adopted at the turning position.

3. The construction method for casting and cooling the large-volume concrete of the amusement project according to claim 1, wherein the construction method comprises the following steps: the number of the condenser pipe plane layer units in the step a is determined by the thickness of concrete, and when the thickness of the concrete is less than 3m, the condenser pipe plane layer units are distributed in a layer mode; when the thickness of the concrete is more than or equal to 3m, the plane layer units of the condenser pipes are arranged in multiple layers.

4. The construction method for casting and cooling the large-volume concrete of the amusement project according to claim 3, wherein the construction method comprises the following steps: the distance between two adjacent condenser pipe plane layer units is 1.5-1.8 m.

5. The distance between the condenser pipe plane layer unit positioned at the top and the top surface of the bearing platform is 0.2-0.5 m, and the distance between the condenser pipe plane layer unit positioned at the bottom and the bottom of the bearing platform is 0.2-0.5 m respectively.

6. The construction method for casting and cooling the large-volume concrete of the amusement project according to claim 2, wherein the construction method comprises the following steps: in the step a, the plurality of rectangular condenser pipes of the condenser pipe plane layer unit coincide with each other, the plane central axis formed by the plurality of rectangular condenser pipes is overlapped, the plane area formed by the plurality of rectangular condenser pipes is sequentially increased from inside to outside, the distance between every two adjacent rectangular condenser pipes is 2-2.2 m, and the distance between the rectangular condenser pipe positioned at the outer edge and the edge of the bearing platform is 1.5-2 m.

Technical Field

The invention relates to the technical field of concrete pouring, in particular to a construction method for cooling mass concrete in an amusement project.

Background

With the increasing popularity of the domestic theme park industry, large amusement equipment projects are never away from the attention focus of people as signboard projects of various theme parks, and the safety guarantee which cannot be ignored by equipment operation is accompanied by the entertainment excitement and rapid experience sense of the large amusement equipment projects. The foundation construction is the premise of safe operation of amusement equipment, the pouring of foundation concrete is the most important link in the foundation construction, and most of the amusement equipment foundations are large in size, deep in depth and high in construction quality requirements, and the large-size concrete needs to have good durability and impermeability besides the requirement of meeting the strength, and some of the large-size concrete needs to have the performances of impact resistance, vibration resistance, erosion resistance and the like. However, the concrete cement hydration heat is not easy to dissipate quickly, and the concrete cement hydration heat is stored in the concrete, so that the internal temperature is increased greatly, and cracks caused by the temperature are easily generated due to large internal and external temperature difference, so that the temperature is controlled, and the concrete cement hydration heat is the most critical step in the large-volume concrete construction of the bearing platform.

At present, measures of reducing the water-cement ratio by adding a high-performance water reducing agent, reducing the cement amount by adding fly ash and the like are adopted in construction to reduce the hydration heat, and in the practical process, the cooling effect on concrete is not ideal, and the control on the heat loss of the concrete is inconvenient.

Therefore, it is a problem worth studying to provide a construction method for casting and cooling large-volume concrete, in which a circulating cooling condenser pipe is arranged in the concrete, circulating water is used to reduce the internal temperature of the concrete, cracks generated by large-volume concrete due to large internal and external temperature difference are reduced, and the construction quality of the large-volume concrete is ensured.

Disclosure of Invention

In view of the above-mentioned deficiencies of the prior art, the present invention aims to provide a method for casting and cooling large-volume concrete, which comprises disposing a cooling condenser pipe inside the concrete, circulating water to reduce the temperature inside the concrete, reducing cracks in the large-volume concrete caused by a large difference between the internal temperature and the external temperature, and ensuring the construction quality of the large-volume concrete.

The purpose of the invention is realized as follows:

a construction method for casting and cooling large-volume concrete of an amusement project comprises the following steps: step a, laying a condensation pipe: according to the size of a bearing platform, sequentially arranging a plurality of condenser pipe plane layer units on the bearing platform from top to bottom, wherein each condenser pipe plane layer unit comprises a plurality of rectangular condenser pipes; step b, connecting the condenser pipe with the steel bars of the bearing platform: the condenser pipe in the step a is firmly fixed with the bearing platform steel bars through the threaded suspension wires up and down; step c, controlling the water quantity of the condensation pipe: after the condenser pipe and the bearing platform steel bar in the step b are firmly fixed, the inlet of the condenser pipe is connected with a nearby water faucet through a hose and a first valve, the water injection amount is controlled through the first valve, water is naturally circulated and cooled, the outlet of the condenser pipe is connected with an external water tank through the hose and a second valve, and a first valve and a second valve are respectively arranged at the water inlet and the water outlet of the condenser pipe so as to control the water inlet direction and the flow rate; d, operation of a condensation pipe: c, after the condensate pipe in the step c is installed, water is required to be introduced for trial operation, and the sealing condition of the water pipe is checked; after the concrete pouring construction is finished, water starts to flow through for water circulation after initial setting, and a specially-assigned person is sent to take supervision to prevent pipe blockage; and arranging a specially-assigned person at the water inlet and outlet for measuring the temperature, recording for 1 time every 2 hours, stopping the circulation of condensed water after the temperature difference between the inside and the outside of concrete is stable after the concrete is poured for 10 days, and grouting and plugging the inlet and the outlet of the condensation pipe after the use is finished to cut off the exposed part.

The condensation pipe in the steps a to c adopts a GDJ iron pipe with the inner diameter phi of 32mm and the wall thickness of 1.5mm, the end of the condensation pipe is tapped, the condensation pipe is a rectangular condensation pipe formed by a bent pipe joint and a straight pipe joint, and a 90-degree threaded connection elbow is adopted at the turning position.

The number of the condenser pipe plane layer units in the step a is determined by the thickness of concrete, and when the thickness of the concrete is less than 3m, the condenser pipe plane layer units are distributed in a layer mode; when the thickness of the concrete is more than or equal to 3m, the plane layer units of the condenser pipes are arranged in multiple layers.

The distance between two adjacent condenser pipe plane layer units is 1.5-1.8 m. The distance between the condenser pipe plane layer unit positioned at the top and the top surface of the bearing platform is 0.2-0.5 m, and the distance between the condenser pipe plane layer unit positioned at the bottom and the bottom of the bearing platform is 0.2-0.5 m respectively.

In the step a, the plurality of rectangular condenser pipes of the condenser pipe plane layer unit coincide with each other, the plane central axis formed by the plurality of rectangular condenser pipes is overlapped, the plane area formed by the plurality of rectangular condenser pipes is sequentially increased from inside to outside, the distance between every two adjacent rectangular condenser pipes is 2-2.2 m, and the distance between the rectangular condenser pipe positioned at the outer edge and the edge of the bearing platform is 1.5-2 m.

The invention has the beneficial effects that: according to the invention, the circulating cooling condenser pipe is arranged in the concrete, and the internal temperature of the concrete is reduced by circulating water, so that the hydration heat generated in the concrete can be quickly and effectively reduced, and the internal and external temperature difference of the concrete is reduced; the circulating water is adopted to reduce the internal temperature of the concrete, the materials are simple to obtain, the materials are convenient to use, the cooling effect is better, and the flow rate of the circulating water is controlled, so that the cooling speed of the concrete is convenient to control, concrete cracks can be reduced to the greatest extent, and the construction quality of the large-volume concrete is ensured.

Drawings

FIG. 1 is a schematic plan view of the arrangement of the condenser tube according to the present invention;

FIG. 2 is a schematic view of the condenser tube layout in elevation.

Detailed Description

The invention is further illustrated by the following figures and examples.

Example 1

As shown in fig. 1 and 2, the construction method for casting and cooling the large-volume concrete of the amusement project comprises the following steps: step a, laying of a condensation pipe: according to the size of a bearing platform, a plurality of condenser pipe plane layer units are sequentially arranged on the bearing platform from top to bottom, each condenser pipe plane layer unit comprises a plurality of rectangular condenser pipes, the central axes of planes formed by the plurality of rectangular condenser pipes are overlapped, the area of the plane formed by the plurality of rectangular condenser pipes is sequentially increased from inside to outside, the distance between every two adjacent rectangular condenser pipes is 2m, and the distance between the rectangular condenser pipe positioned at the outer edge and the edge of the bearing platform is 1.5 m; the condenser pipe adopts a GDJ iron pipe with the inner diameter phi of 32mm and the wall thickness of 1.5mm, the end head of the condenser pipe is tapped, the rectangular condenser pipe is formed by a bent pipe joint and a straight pipe joint, the turning part of the rectangular condenser pipe adopts a 90-degree threaded connection elbow, the rectangular condenser pipe is wound by using an adhesive tape after connection so as to prevent water leakage, the number of the plane layer units of the condenser pipe is determined by the thickness of concrete, and when the thickness of the concrete is less than 3m, the plane layer units of the condenser pipe are arranged by one layer; when the thickness of the concrete is larger than or equal to 3m, the condenser pipe plane layer units are arranged in a multilayer mode, and the distance between every two adjacent condenser pipe plane layer units is 1.5. The distance between the condenser pipe plane layer unit positioned at the top and the top surface of the bearing platform is 0.2m, and the distance between the condenser pipe plane layer unit positioned at the bottom and the bottom of the bearing platform is 0.2m respectively.

Step b, connecting the condenser pipe with the steel bars of the bearing platform: and (c) fixing the condenser pipe in the step (a) with a bearing platform steel bar firmly through the upper and lower threaded suspension wires to prevent the condenser pipe from losing efficacy due to the influence of concrete pouring and vibration.

Step c, controlling the water quantity of the condensation pipe: after the condenser pipe in the step b is firmly fixed with the bearing platform steel bar, the inlet of the condenser pipe is connected with a nearby faucet or cold water tank through a hose and a first valve, the condenser pipe is wound by using an adhesive tape after being connected to prevent water leakage, the water injection amount is controlled through the first valve to enable water to naturally circulate and cool concrete, the outlet of the condenser pipe is connected with an external water tank through the hose and a second valve to prevent water leakage, the first valve and the second valve are respectively arranged at the water inlet and the water outlet of the condenser pipe to control the water inlet direction and the water inlet flow rate, so that the temperature reduction speed of the concrete is controlled conveniently, concrete cracks can be reduced to the maximum extent, the construction quality of large-volume concrete is ensured, the operation is flexible, the temperature reduction effect of the concrete is good, water discharged from the water outlet of the condenser pipe can be recycled, and resources are saved.

D, operation of a condensation pipe: c, after the condenser pipe is installed in the step c, water is required to be introduced for trial operation, and the sealing condition of the water pipe is checked; after the concrete pouring construction is finished, water starts to flow through for water circulation after initial setting, and a specially-assigned person is sent to take supervision to prevent pipe blockage; and arranging a specially-assigned person at the water inlet and outlet for measuring the temperature, recording for 1 time every 2 hours, stopping the circulation of condensed water after the temperature difference between the inside and the outside of concrete is stable after the concrete is poured for 10 days, and grouting and plugging the inlet and the outlet of the condensation pipe after the use is finished to cut off the exposed part.

Example 2

As shown in fig. 1 and 2, the construction method for casting and cooling the large-volume concrete of the amusement project comprises the following steps: step a, laying a condensation pipe: according to the size of a bearing platform, a plurality of condenser pipe plane layer units are sequentially arranged on the bearing platform from top to bottom, each condenser pipe plane layer unit comprises a plurality of rectangular condenser pipes, the central axes of planes formed by the plurality of rectangular condenser pipes are overlapped, the area of the plane formed by the plurality of rectangular condenser pipes is sequentially increased from inside to outside, the distance between every two adjacent rectangular condenser pipes is 2.2m, and the distance between the rectangular condenser pipe positioned at the outer edge and the edge of the bearing platform is 2 m; the condenser pipe adopts a GDJ iron pipe with the inner diameter phi of 32mm and the wall thickness of 1.5mm, the end head of the condenser pipe is tapped, the rectangular condenser pipe is formed by a bent pipe joint and a straight pipe joint, the turning part of the rectangular condenser pipe adopts a 90-degree threaded connection elbow, the rectangular condenser pipe is wound by using an adhesive tape after connection so as to prevent water leakage, the number of the plane layer units of the condenser pipe is determined by the thickness of concrete, and when the thickness of the concrete is less than 3m, the plane layer units of the condenser pipe are arranged by one layer; when the thickness of the concrete is larger than or equal to 3m, the condenser pipe plane layer units are arranged in a multilayer mode, and the distance between every two adjacent condenser pipe plane layer units is 1.8 m. The distance between the condenser pipe plane layer unit positioned at the top and the top surface of the bearing platform is 0.5m, and the distance between the condenser pipe plane layer unit positioned at the bottom and the bottom of the bearing platform is 0.5m respectively.

Step b, connecting the condenser pipe with the steel bars of the bearing platform: and (c) fixing the condenser pipe in the step (a) with a bearing platform steel bar firmly through the upper and lower threaded suspension wires to prevent the condenser pipe from losing efficacy due to the influence of concrete pouring and vibration.

Step c, controlling the water quantity of the condensation pipe: after the condenser pipe in the step b is firmly fixed with the bearing platform steel bar, the inlet of the condenser pipe is connected with a nearby faucet or cold water tank through a hose and a first valve, the condenser pipe is wound by using an adhesive tape after being connected to prevent water leakage, the water injection amount is controlled through the first valve to enable water to naturally circulate and cool concrete, the outlet of the condenser pipe is connected with an external water tank through the hose and a second valve to prevent water leakage, the first valve and the second valve are respectively arranged at the water inlet and the water outlet of the condenser pipe to control the water inlet direction and the water inlet flow rate, so that the temperature reduction speed of the concrete is controlled conveniently, concrete cracks can be reduced to the maximum extent, the construction quality of large-volume concrete is ensured, the operation is flexible, the temperature reduction effect of the concrete is good, water discharged from the water outlet of the condenser pipe can be recycled, and resources are saved.

D, operation of a condensation pipe: c, after the condenser pipe is installed in the step c, water is required to be introduced for trial operation, and the sealing condition of the water pipe is checked; after the concrete pouring construction is finished, water starts to flow through for water circulation after initial setting, and a specially-assigned person is sent to take supervision to prevent pipe blockage; and arranging a specially-assigned person at the water inlet and outlet for measuring the temperature, recording for 1 time every 2 hours, stopping the circulation of condensed water after the temperature difference between the inside and the outside of concrete is stable after the concrete is poured for 10 days, and grouting and plugging the inlet and the outlet of the condensation pipe after the use is finished to cut off the exposed part.

According to the invention, the circulating cooling condenser pipe is arranged in the concrete, and the internal temperature of the concrete is reduced by circulating water, so that the hydration heat generated in the concrete can be quickly and effectively reduced, and the internal and external temperature difference of the concrete is reduced; the circulating water is adopted to reduce the internal temperature of the concrete, the materials are simple to obtain, the materials are convenient to use, the cooling effect is better, and the flow rate of the circulating water is controlled, so that the cooling speed of the concrete is convenient to control, concrete cracks can be reduced to the greatest extent, and the construction quality of the large-volume concrete is ensured.