阅读说明：本技术 一种混凝土防腐蚀装置及其施工方法 (Concrete anti-corrosion device and construction method thereof ) 是由 晁刚 谢成萍 薛兆锋 程文东 于 2020-06-19 设计创作，主要内容包括：本发明公开了一种混凝土防腐蚀装置及其施工方法,属于混凝土防腐技术领域,该装置由内壁钢模板、外壁钢模板组成,所述内壁钢模板、外壁钢模板的高均为2米,内壁钢模板直径为桥梁桩基设计直径。本发明还公开了一种混凝土防腐蚀装置的施工方法。本发明的混凝土防腐蚀装置可为盐渍土地区桥涵构造物建设提供技术支撑,保证盐渍土地区桥涵构造物的建设质量、延长工程使用寿命,减少了日后的养护维修费用,有效降低了工程全寿命周期建设成本,极大的节约人力、物力和财力。(The invention discloses a concrete anti-corrosion device and a construction method thereof, belonging to the technical field of concrete anti-corrosion, wherein the device comprises an inner wall steel formwork and an outer wall steel formwork, the heights of the inner wall steel formwork and the outer wall steel formwork are both 2 m, and the diameter of the inner wall steel formwork is the designed diameter of a bridge pile foundation. The invention also discloses a construction method of the concrete anti-corrosion device. The concrete anti-corrosion device can provide technical support for the construction of bridges and culverts in saline soil areas, ensure the construction quality of bridges and culverts in saline soil areas, prolong the service life of projects, reduce the maintenance and repair cost in the future, effectively reduce the construction cost of the whole life cycle of the projects, and greatly save manpower, material resources and financial resources.)

1. The utility model provides a concrete anticorrosion device which characterized in that comprises inner wall steel form, outer wall steel form, the height of inner wall steel form, outer wall steel form is 2 meters, and inner wall steel form diameter is bridge pile foundation design diameter.

2. The concrete corrosion protection device of claim 1, wherein the outer wall steel form is spaced from the inner wall steel form by 5 cm.

3. The concrete corrosion protection device according to claim 1, wherein the thickness of each of the inner wall steel form and the outer wall steel form is 2 mm.

4. A construction method of the concrete corrosion prevention device according to claim 1, characterized by comprising the following steps:

step 1, processing and forming an inner wall steel template and an outer wall steel template which form the steel die sleeve in a semicircular shape in a factory, conveying the semicircular steel template with the height of 2 meters to a construction site, and performing seamless welding assembly on joints of the 2 semicircular steel templates in the construction site to form a finished steel die sleeve;

2, processing a circular die sleeve by using a steel template according to the design size of the bridge pile foundation on a construction site, wherein the die sleeve is 2 meters high, the inner radius is the design radius of the bridge pile foundation, and the middle of the die sleeve is hollow and 5 centimeters thick;

step 3, brushing lubricating oil on the inner wall and the outer wall of the steel die sleeve, and pouring the mixed ultrahigh-performance concrete into the steel die sleeve;

step 4, vibrating and maintaining according to the cement concrete construction standard, and removing the formwork after the design strength requirement is met to form the bridge pile foundation anti-corrosion sheath which is formed by pouring the ultra-high performance concrete and has the thickness of 5 cm;

step 5, hoisting the formed corrosion-resistant sheath poured by the ultrahigh-performance concrete into the hole of the bridge pile foundation by using a crane, and pouring common concrete in the ultrahigh-performance concrete sheath;

and 6, butting the ultrahigh-performance concrete sheaths section by section according to the design depth of the bridge pile foundation, and pouring common concrete to complete the construction of the bridge pile foundation.

Technical Field

The invention belongs to the technical field of concrete corrosion prevention, and relates to a concrete corrosion prevention device and a construction method thereof.

Background

With the development of highway construction, the influence of the highway construction on the environment becomes a new hot spot. In order to ensure the sustainable development of highway construction, the method actively introduces, popularizes and applies the advanced new technology and new material at home and abroad, and is a measure which has great economic and social benefits and benefits the nation and people.

With the large-scale of concrete engineering in the 21 st century, the complication of engineering environment and the continuous expansion of application fields, people put forward higher requirements on concrete, and the high performance and high functionality of concrete materials are important directions for the development of concrete science and engineering technology in the 21 st century. The high-performance concrete has higher compressive strength and durability, and can overcome the defects of large self weight and low durability of a common concrete structure. However, a large number of researches and engineering applications show that the high-performance concrete still has many problems to be solved, for example, the post-cast strip concrete of the bridge expansion joint can bear the impact of high stress and is often damaged due to insufficient strength, so that the driving comfort is influenced; under the repeated action of load, the common bridge and culvert structure can cause the damage of the structure because of the insufficient tensile strength of the concrete; concrete structures in saline soil and humid environment are corroded by harmful media for a long time, so that corrosion damage of the concrete can be caused, and further the safety of the structures is affected, and the problems need to be solved in the actual use process of common high-performance concrete.

The ultra-high performance concrete is a novel cement-based material which is different from common high performance concrete in the aspects of material composition, mix proportion design, microstructure and the like, has the advantages of high durability and almost no maintenance cost, and compared with the traditional high performance concrete structure, the service life of the UHPC structure can be prolonged by times. According to the existing test and theoretical analysis results, the service life of the UHPC structure can be expected, and the service life can exceed more than 200 years in corrosive natural environments (such as oceans, saline soil and the like); can reach 1000 years in non-corrosive environment (such as city building). Relatively conservative japan assumes that the design operating life of the UHPC structure is 100 years under normal usage environmental conditions. The carbonization, steel fiber and reinforcing steel bar corrosion, freeze-thaw cycle, sulfate corrosion and alkali-aggregate reaction in the durability belong to the inspection-free project.

The salinized soil is mainly characterized in that the soil contains salt, particularly easily soluble salt, which has obvious corrosivity on highway bridges and structures, and forms a harsher corrosive environment on structural foundations and underground facilities, thereby affecting the durability and the safety of the salinized soil. Therefore, the durability of cement concrete in the saline soil area becomes a key problem for influencing the highway bridges and culverts and the normal operation of the structures in the area. In western regions of China, the phenomenon of structure damage caused by concrete corrosion is very common. On one hand, the rapid development of western economy brings about rapid increase of traffic volume, road transportation is particularly not smooth, and a large number of roads need to be built; on the other hand, related departments consume a large amount of manpower and material resources to manage each year, but the effect is not ideal, and huge economic loss is caused, so that the highway service capacity in the saline soil area is seriously lagged behind that in the non-saline soil area.

Disclosure of Invention

The invention aims to provide a concrete anti-corrosion device and a construction method thereof, and the device is used for preventing concrete in a saline soil area from being corroded and has important significance for the economic development of the saline soil area and the safe operation of roads.

The specific technical scheme is as follows:

the utility model provides a concrete anticorrosion device comprises inner wall steel form, outer wall steel form, the height of inner wall steel form, outer wall steel form is 2 meters, and inner wall steel form diameter is bridge pile foundation design diameter.

Further, the distance between the outer wall steel moulding plate and the inner wall steel moulding plate is 5 cm.

Further, the thickness of the inner wall steel template and the outer wall steel template is 2 mm.

The invention relates to a construction method of a concrete anti-corrosion device, which comprises the following specific steps:

step 1, processing and forming an inner wall steel template and an outer wall steel template which form the steel die sleeve in a semicircular shape in a factory, conveying the semicircular steel template with the height of 2 meters to a construction site, and performing seamless welding assembly on joints of the 2 semicircular steel templates in the construction site to form a finished steel die sleeve;

and 2, processing a circular die sleeve by using a steel template according to the design size of the bridge pile foundation on the construction site, wherein the die sleeve is 2 meters high, the inner radius is the design radius of the bridge pile foundation, and the middle of the die sleeve is hollow and 5 centimeters thick.

And 3, brushing lubricating oil on the inner wall and the outer wall of the steel die sleeve, and pouring the mixed ultrahigh-performance concrete into the steel die sleeve.

And 4, vibrating and maintaining according to the cement concrete construction standard, and removing the formwork after the design strength requirement is met to form the anti-corrosion sheath of the bridge pile foundation with the thickness of 5 cm formed by pouring the ultra-high performance concrete.

And 5, hoisting the formed corrosion-resistant sheath poured by the ultrahigh-performance concrete into the bridge pile foundation hole by using a crane, and pouring common concrete into the ultrahigh-performance concrete sheath.

And 6, butting the ultrahigh-performance concrete sheaths section by section according to the design depth of the bridge pile foundation, and pouring common concrete to complete the construction of the bridge pile foundation.

Compared with the prior art, the invention has the beneficial effects that:

the concrete anti-corrosion device can provide technical support for the construction of bridges and culverts in saline soil areas, ensure the construction quality of bridges and culverts in saline soil areas, prolong the service life of projects, reduce the maintenance and repair cost in the future, effectively reduce the construction cost of the whole life cycle of the projects, and greatly save manpower, material resources and financial resources.

Drawings

FIG. 1 is a schematic view of a steel form; 1-inner wall steel moulding plate; 2-the distance between the outer wall steel moulding plate and the inner wall steel moulding plate; 3-the height of the outer wall steel template and the inner wall steel template; 4-diameter of bridge pile foundation; 5-outer wall steel moulding plate;

FIG. 2 is a schematic diagram of on-site welding processing of a steel die sleeve. 6-welding seams of steel templates; and 7, machining and forming a semicircular steel template in a factory.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the concrete corrosion prevention device comprises an inner wall steel formwork 1 and an outer wall steel formwork 5, wherein the height 3 of the inner wall steel formwork and the height 3 of the outer wall steel formwork are both 2 meters, and the diameter of the inner wall steel formwork is 4 of the diameter of a bridge pile foundation. The distance 2 between the outer wall steel moulding plate and the inner wall steel moulding plate is 5 cm. The thickness of the inner wall steel template and the outer wall steel template is 2 mm.

The inner wall steel templates and the outer wall steel templates forming the steel die sleeve are semi-circular steel templates 7 formed by factory processing, the semi-circular steel templates with the height of 2 meters are conveyed to a construction site, seam-free welding and assembling are carried out on 2 semi-circular steel template welding seams 6 at the construction site, a finished steel die sleeve is formed, and the welding and assembling of the semi-circular steel templates at the site are shown in figure 2.

The ultra-high performance concrete anti-corrosion device is divided into 5 steps in the process of forming the ultra-high performance concrete casing and field construction.

Firstly, according to the design size of a bridge pile foundation, a steel template is used for processing a circular die sleeve in a construction site, the die sleeve is 2 meters high, the inner radius is the design radius of the bridge pile foundation, and the middle of the die sleeve is hollow and 5 centimeters thick.

Secondly, lubricating oil is brushed on the inner wall and the outer wall of the steel die sleeve, and the mixed ultrahigh-performance concrete is poured into the steel die sleeve.

And thirdly, vibrating and maintaining according to the cement concrete construction standard, and removing the formwork after the design strength requirement is met to form the anti-corrosion sheath of the bridge pile foundation with the thickness of 5 cm formed by pouring the ultrahigh-performance concrete.

Fourthly, hoisting the formed corrosion-resistant sheath poured by the ultrahigh-performance concrete into the hole of the bridge pile foundation by using a crane, and pouring common concrete into the ultrahigh-performance concrete sheath.

And fifthly, butting the ultrahigh-performance concrete sheaths section by section according to the design depth of the bridge pile foundation, and pouring common concrete to complete the construction of the bridge pile foundation.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.