阅读说明：本技术 一种利用高强预应力混凝土管桩进行碳存储的方法及管桩 (Method for storing carbon by using high-strength prestressed concrete pipe pile and pipe pile ) 是由 汪磊 霍正格 夏京 于 2021-07-19 设计创作，主要内容包括：本发明提供一种利用高强预应力混凝土管桩进行碳存储的方法及管桩,通过预应力混凝土管桩的管桩桩内管道作为高压密封储存空间以储存二氧化碳,管桩桩内管道的两端通过混凝土进行封闭,并在其中一端预先埋设单向阀,通过单向阀便可以向管桩桩内管道中充入液态二氧化碳,以将二氧化碳封存在管桩中,而管桩后续可以进行完全封闭和建筑工程的二次使用,从而通过预应力混凝土管桩完成碳封存工作,可以将建筑工程中使用的大量的预制空心管桩提供的超大容量的空腔体积进行利用,相较于传统的深海存储和地质存储,其技术难度更低,发生地质运动等意外时,一般只有个别管桩会发生泄漏,不会导致所有管桩泄漏,使用的安全风险更小。(The invention provides a method for storing carbon by utilizing a high-strength prestressed concrete pipe pile and the pipe pile, wherein an inner pipe of the pipe pile of the prestressed concrete pipe pile is used as a high-pressure sealed storage space to store carbon dioxide, two ends of the inner pipe of the pipe pile are sealed by concrete, a one-way valve is pre-buried at one end of the inner pipe of the pipe pile, liquid carbon dioxide can be filled into the inner pipe of the pipe pile through the one-way valve to store the carbon dioxide in the pipe pile, the pipe pile can be completely sealed and used for the second time in the construction engineering, so that the carbon storage work is completed through the prestressed concrete pipe pile, the large-capacity super-cavity volume provided by a large number of prefabricated hollow pipe piles used in the construction engineering can be utilized, compared with the traditional deep sea storage and geological storage, the technical difficulty is lower, when accidents such as geological movement and the like occur, only individual pipe piles generally leak, all tubular piles cannot be leaked, and the use safety risk is smaller.)

1. A method for storing carbon by using a high-strength prestressed concrete pipe pile is characterized by comprising the following steps:

prefabricating a pile body: manufacturing a pile body of a prestressed concrete hollow pipe pile;

pile end treatment and embedding of a one-way valve: sealing two ends of a hollow pipe pile body through expansion core filling mortar, wherein a one-way valve is embedded in advance when one end of the hollow pipe pile body is sealed through the expansion core filling mortar, and the periphery of the one-way valve is kept in a groove shape;

pile end hoop connection: pile hoops are arranged at two ends of a hollow pipe pile body;

the pile body has no one-way valve end and is welded with a closed end plate: tightly welding a closed end plate and a pile head hoop at one end of the hollow pipe pile body, which is not provided with the one-way valve;

filling liquid carbon dioxide through a one-way valve: filling liquid carbon dioxide into a pipe pile inner pipeline of a hollow pipe pile body through a one-way valve;

tightly filling the groove of the one-way valve: sealing the peripheral groove of the one-way valve of the hollow pipe pile body filled with the liquid carbon dioxide by using fine stone mortar and leveling the peripheral groove with the pile head;

the pile body check valve end is welded with a closed end plate: after the one-way valve groove is closed, the end is sealed by closely welding a closed end plate and a pile head hoop;

forming: and finishing final sealing treatment and forming the high-strength prestressed concrete pipe pile storing carbon dioxide.

2. A tubular pile suitable for the method for storing carbon by using a high-strength prestressed concrete tubular pile according to claim 1, comprising a hollow tubular pile body, wherein the hollow tubular pile body is of a hollow pipeline structure, a tubular pile inner pipeline which is communicated with the front and the back is arranged in the hollow tubular pile body, the front end and the back end of the tubular pile inner pipeline are both sealed by expanding core filling mortar, a filling groove is arranged at one end of the tubular pile, and a check valve is arranged in the middle of the filling groove.

3. The tubular pile of claim 2, wherein pile hoops are arranged at the front end and the rear end of the hollow pile body, and the height of the outer end of the one-way valve is lower than that of the outer end face of each pile hoop.

4. The tubular pile of claim 3, wherein the pile hoop is attached to the outside and provided with a closed end plate, the pile end closed end plate is of a solid circular plate structure, and the closed end plate is in close-fitting full-welding fixed connection with the pile hoop.

5. The tubular pile of claim 2, wherein the inner side of the filling groove is filled with sealing mortar, and the outer side of the sealing mortar is flush with the pile head of the hollow pile body.

Technical Field

One or more embodiments of the present disclosure relate to the technical field of concrete pipe piles, and in particular, to a method for storing carbon by using a high-strength prestressed concrete pipe pile and a pipe pile.

Background

The prestressed concrete pipe pile is an important pile foundation material, the pipe pile industry is mainly applied to the fields of water conservancy, municipal administration, industrial and civil buildings, ports, railways, roads, bridges and the like, a large amount of prefabricated hollow pipe piles are used, an ultra-large-capacity cavity volume is provided, the existence of the cavity volume can provide a storage space for other industries, in recent years, along with the deterioration of global climate environment, people try to carry out energy-saving and emission-reduction work and research for preventing climate warming, and particularly pay attention to reducing the emission of carbon dioxide. The emission reduction paths are many, but for countries using coal as main energy, the cost for reducing the use of coal is high, so that carbon capture and storage technology becomes an important alternative choice, and therefore, the carbon capture and storage technology has great attraction for countries which do not want to change energy consumption structures.

The applicant finds that the existing storage technologies have limitations and hidden dangers, the deep sea storage and geological storage technologies have huge cost and higher technical requirements, and a large amount of manpower and material resources are required to be output; for deep sea storage, carbon dioxide is driven into the sea bottom at high pressure, but the leakage of a large amount of carbon dioxide is serious due to frequent occurrence of sea bottom earthquakes; in geological storage, carbon dioxide is driven to the position with the depth of kilometers underground, although leakage is not easy to occur, the requirements on geological conditions and rock stratum continuous distribution are high, and a large amount of stored geology is not easy to find; therefore, how to find a cheap and simple carbon storage technology and method and ensure the storage quality and safety is a key problem to be solved urgently in the scientific field at present.

Disclosure of Invention

In view of the above, one or more embodiments of the present disclosure are directed to a method for storing carbon by using a high-strength prestressed concrete pipe pile and a pipe pile, so as to solve the problems of huge cost, severe storage requirement, and low safety of the existing carbon storage technology and method.

In view of the above, one or more embodiments of the present disclosure provide a method for carbon storage using a high-strength prestressed concrete pipe pile, including the steps of:

prefabricating a pile body: manufacturing a pile body of a prestressed concrete hollow pipe pile;

pile end treatment and embedding of a one-way valve: sealing two ends of a hollow pipe pile body through expansion core filling mortar, wherein a one-way valve is embedded in advance when one end of the hollow pipe pile body is sealed through the expansion core filling mortar, and the periphery of the one-way valve is kept in a groove shape;

pile end hoop connection: pile hoops are arranged at two ends of a hollow pipe pile body;

the pile body has no one-way valve end and is welded with a closed end plate: tightly welding a closed end plate and a pile head hoop at one end of the hollow pipe pile body, which is not provided with the one-way valve;

filling liquid carbon dioxide through a one-way valve: filling liquid carbon dioxide into a pipe pile inner pipeline of a hollow pipe pile body through a one-way valve;

tightly filling the groove of the one-way valve: sealing the peripheral groove of the one-way valve of the hollow pipe pile body filled with the liquid carbon dioxide by using fine stone mortar and leveling the peripheral groove with the pile head;

the pile body check valve end is welded with a closed end plate: after the one-way valve groove is closed, the end is sealed by closely welding a closed end plate and a pile head hoop;

forming: and finishing final sealing treatment and forming the high-strength prestressed concrete pipe pile storing carbon dioxide.

A tubular pile suitable for the method for storing carbon by using a high-strength prestressed concrete tubular pile according to claim 1, comprising a hollow tubular pile body, wherein the hollow tubular pile body is of a hollow pipeline structure, a tubular pile inner pipeline which is communicated with the front and the back is arranged in the hollow tubular pile body, the front end and the back end of the tubular pile inner pipeline are both sealed by expanding core filling mortar, a filling groove is arranged at one end of the tubular pile, and a check valve is arranged in the middle of the filling groove.

In some optional embodiments, the front end and the rear end of the hollow pile body are provided with pile hoops, and the height of the outer end of the one-way valve is lower than the height of the outer end face of the pile hoop.

In some optional embodiments, a closed end plate is attached to the outer side of the pile hoop, the pile end closed end plate is of a solid circular plate structure, and the closed end plate and the pile hoop are closely attached and fixedly connected through full welding.

In some optional embodiments, the inner side of the filling groove is filled with sealing mortar, and the outer side of the sealing mortar is flush with the pile head of the hollow pile body.

As can be seen from the above description, in the method for storing carbon by using a high-strength prestressed concrete pipe pile and the pipe pile provided in one or more embodiments of the present disclosure, a pipe pile inner pipe of the prestressed concrete pipe pile serves as a high-pressure sealed storage space to store carbon dioxide, two ends of the pipe pile inner pipe are sealed by concrete, and a check valve is pre-buried in one end of the pipe pile inner pipe, so that the pipe pile integrally forms a sealed container capable of bearing high pressure, liquid carbon dioxide can be filled into the pipe pile inner pipe through the check valve to store the carbon dioxide in the pipe pile, and the pipe pile can be subsequently completely sealed and used for a second time in a building engineering, so that the carbon storage work is completed by the prestressed concrete pipe pile, and the volume of an ultra-large cavity provided by a large number of prefabricated hollow pipe piles used in the building engineering can be utilized, compared with the traditional deep sea storage and geological storage, the technical difficulty is lower, when accidents such as geological movement occur, only a single tubular pile can leak, all tubular piles cannot leak, and the use safety risk is lower.

Drawings

In order to more clearly illustrate one or more embodiments of the present disclosure or technical solutions in related arts, the drawings used in the description of the embodiments or related arts will be briefly described below, it is obvious that the drawings in the following description are only examples of one or more embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic flow diagram of a method in accordance with one or more embodiments of the present disclosure;

fig. 2 is a schematic view of a longitudinal cross-sectional structure of a tube pile according to one or more embodiments of the present disclosure;

fig. 3 is a schematic front structure view of a tube pile according to one or more embodiments of the present disclosure;

fig. 4 is a schematic structural diagram of a tube stake according to one or more embodiments of the present disclosure before being filled with carbon dioxide for sequestration;

fig. 5 is a schematic diagram of the structure of the back end face of the tube stake after being filled with carbon dioxide and sealed according to one or more embodiments of the present disclosure.

Detailed Description

To make the objects, aspects and advantages of one or more embodiments of the present disclosure more apparent, one or more embodiments of the present disclosure are described in further detail below with reference to specific embodiments.

It is to be understood that unless otherwise defined, technical or scientific terms used herein with respect to one or more embodiments of the present disclosure shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar language in one or more embodiments of the present description is not intended to imply any order, quantity, or importance, but rather the intention is to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In recent years, with the deterioration of global climate environment, people are making efforts to save energy and reduce emission and research for preventing climate warming, and particularly, attention is paid to reducing carbon dioxide emission. The emission reduction paths are many, but for countries using coal as main energy, the cost for reducing the use of coal is high, so that carbon capture and storage technology becomes an important alternative choice, and therefore, the carbon capture and storage technology has great attraction for countries which do not want to change energy consumption structures.

The existing storage technology has limitations and hidden dangers, the deep sea storage and geological storage technology is huge in cost, high in technical requirement and needs a large amount of manpower and material resource output; for deep sea storage, carbon dioxide is driven into the sea bottom at high pressure, but the leakage of a large amount of carbon dioxide is serious due to frequent occurrence of sea bottom earthquakes; in geological storage, carbon dioxide is driven to the position with the depth of kilometers underground, although leakage is not easy to occur, the requirements on geological conditions and rock stratum continuous distribution are high, and a large amount of stored geology is not easy to find; therefore, how to find a cheap and simple carbon storage technology and method and ensure the storage quality and safety is a key problem to be solved urgently in the scientific field at present.

Embodiments of the present disclosure provide a method for carbon storage using a high-strength prestressed concrete pipe pile, as shown in fig. 1, including the following steps:

s101, pile body prefabrication: manufacturing a pile body of a prestressed concrete hollow pipe pile;

s102, pile end processing and embedding of a one-way valve: sealing two ends of a hollow pipe pile body through expansion core filling mortar, wherein a one-way valve is embedded in advance when one end of the hollow pipe pile body is sealed through the expansion core filling mortar, and the periphery of the one-way valve is kept in a groove shape;

s103, connecting pile end hoops: pile hoops are arranged at two ends of a hollow pipe pile body;

s104, welding a closed end plate at the end of the pile body without the one-way valve: tightly welding a closed end plate and a pile head hoop at one end of the hollow pipe pile body, which is not provided with the one-way valve;

s105, filling liquid carbon dioxide through a one-way valve: filling liquid carbon dioxide into a pipe pile inner pipeline of a hollow pipe pile body through a one-way valve;

s106, tightly filling the one-way valve groove: sealing the peripheral groove of the one-way valve of the hollow pipe pile body filled with the liquid carbon dioxide by using fine stone mortar and leveling the peripheral groove with the pile head;

s107, welding a closed end plate at the one-way valve end of the pile body: after the one-way valve groove is closed, the end is sealed by closely welding a closed end plate and a pile head hoop;

s108 forming: and finishing final sealing treatment and forming the high-strength prestressed concrete pipe pile storing carbon dioxide.

Referring to fig. 2 to 5, as an embodiment of the present invention, a pipe pile for carbon storage using a high-strength prestressed concrete pipe pile includes a hollow pile body 1, the hollow pile body 1 is a prestressed concrete pipe pile of a hollow pipe structure, a pipe pile inner pipe 2 communicating front and back is disposed inside the hollow pile body 1, front and back ends of the pipe pile inner pipe 2 are sealed by an expandable core-filling mortar 7, so that the periphery of the pipe pile inner pipe 2 is formed by a pipe wall of the hollow pile body 1, the front and back ends are kept sealed by the expandable core-filling mortar 7, and the pipe pile inner pipe 2 inside the hollow pile body 1 forms a sealed container structure, a filling groove 3 is disposed in the middle of the expandable core mortar 7 at one end of the pipe pile inner pipe 2, the filling groove 3 is of a conical structure, and a check valve 4 is disposed in the middle of the filling groove 3, the closed space inside the tubular pile inner pipeline 2 and the external space can be communicated through the check valve 4, the passing direction of the check valve 4 is from the outer side of the tubular pile inner pipeline 2 to the inner side of the tubular pile inner pipeline, so that liquid carbon dioxide can be filled into the tubular pile inner pipeline 2 through the check valve 4, a certain amount of carbon dioxide is stored through the internal space of the hollow pile body 1 to seal the carbon dioxide, the hollow pile body 1 can still be used as a building material after being filled with the sealed carbon dioxide, and is buried underground to serve as a supporting structure of a corresponding building, so that the sealing of the carbon dioxide is completed by utilizing the ultra-large-capacity cavity volume provided by a large number of prefabricated hollow tubular piles used in engineering construction, compared with a carbon sealing mode of deep sea storage and geological storage, the method does not need to find a proper address environment, has wider applicability and lower technical difficulty, when accidents such as geological motion happen simultaneously, only individual tubular piles can be damaged and leaked, so that all tubular piles cannot be leaked, and the safety risk of using and sealing is smaller.

Referring to fig. 2 to 5, optionally, pile cuffs 5 are respectively disposed at the front end and the rear end of a hollow pile body 1 of the tubular pile, the structural strength at the two ends of the hollow pile body 1 can be improved through the arranged pile cuffs 5, damage and deformation during transportation and hammering can be avoided, the height of the outer end of a one-way valve 4 is lower than that of the outer end face of the pile cuff 5, the one-way valve 4 protrudes and is easy to collide and damage, and subsequent filling and sealing of the one-way valve can be facilitated, sealing mortar 8 is filled in the inner side of the filling groove 3, after the one-way valve 4 completes filling of liquid carbon dioxide, the filling groove 3 around the one-way valve 4 needs to be filled with the sealing mortar 8, so that the one-way valve 4 is sealed and filled, the one-way valve 4 is prevented from being damaged and carbon dioxide is prevented from leaking in the subsequent sealing process, and the safety of overall sealing can be improved.

Referring to fig. 2 to 5, optionally, a closed end plate 6 is attached to the outer side of a pile ferrule 5 of the tubular pile, the closed end plate 6 at the pile end is a solid circular plate structure, the closed end plate 6 and the pile ferrule 5 are closely attached and fixedly connected by full welding, and the outer side of the closed mortar 8 is flush with the pile head of the hollow pile body 1, so that the closed end plate 6 is conveniently welded and fixed, the two ends of the tubular pile can be completely closed by attaching the closed end plate 6 fixed by welding, so as to complete final sealing treatment, further improve the sealing performance of the tubular pile after being integrally stored, avoid leakage and improve storage safety.

When in use, firstly, the integral structural strength and the size of the tubular pile are detected, the strength of the tubular pile after maintenance is determined to meet the storage requirement of carbon dioxide, the closed end plate 6 at one end without the one-way valve 4 is welded and fixed, then liquid carbon dioxide can be filled into the tubular pile inner pipeline 2 of the hollow pile body 1 through the one-way valve 4, after filling is completed, the groove 3 and the one-way valve 4 therein are filled and sealed through the closed mortar 8 to avoid the subsequent aging, damage and leakage of the one-way valve 4, then the closed end plate 6 at the end is closely attached and fixedly connected with the pile ferrule 5 in a full welding way, so that the high-strength prestressed concrete tubular pile storing the carbon dioxide is formed to complete the sealing work of the carbon dioxide, and because the critical temperature of the liquid carbon dioxide is about 31 ℃, the critical pressure of the liquid carbon dioxide is about 73 atmospheric pressures at the temperature, when the liquid carbon dioxide is stored in the tubular pile, the tensile strength of the pipe pile needs to be ensured to be larger than the confining pressure value of liquid carbon dioxide, and the environmental temperature of the carbon dioxide needs to be ensured to be lower than 31 ℃ in the processes of storage and transportation after injection, the ambient temperature around the tubular pile in the construction process of pressing the tubular pile into the soil layer in the subsequent engineering is lower than 31 ℃, the embedded depth of the pile body is generally more than 10 meters, the pile body is ensured not to be influenced by the fluctuation and the change of the external environment temperature, the change of the internal pressure caused by the change of the temperature is avoided, the risk of the damage and the leakage of the pipe pile due to the pressure change is reduced, meanwhile, the tubular pile is generally positioned in a normal temperature layer and a temperature change layer after being buried underground for construction, the temperature change layer is positioned between about 0 and 15 meters below the ground surface, the normal temperature layer is between about 15 and 200 meters, therefore, the tubular pile can generally ensure that the environmental temperature is lower than 23 ℃ when being positioned on a normal temperature layer, so that the internal pressure of the tubular pile can be reduced by a certain value, and the stability and the reliability of carbon dioxide in the size of the tubular pile can be further improved.

The method for storing carbon by utilizing the high-strength prestressed concrete pipe pile and the pipe pile provided by the invention have the advantages that the pipe pile inner pipeline of the prestressed concrete pipe pile is used as a high-pressure sealed storage space to store carbon dioxide, the two ends of the pipe pile inner pipeline 2 are sealed by concrete, and the check valve 4 is embedded in one end of the pipe pile inner pipeline in advance, so that the pipe pile integrally forms a sealed container capable of bearing high pressure, liquid carbon dioxide can be filled into the pipe pile inner pipeline 2 through the check valve 4 to be sealed in the pipe pile, the pipe pile can be completely sealed and used for the second time in building engineering, the carbon sealing work is completed through the prestressed concrete pipe pile, the volume of a large-capacity ultra-large-capacity cavity provided by a large number of prefabricated hollow pipe piles used in the building engineering can be utilized, and compared with the traditional deep sea storage and geological storage, the technical difficulty is lower, when accidents such as geological movement occur, only individual tubular piles can leak generally, all tubular piles cannot leak, and the use safety risk is smaller.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to suggest that the scope of one or more embodiments of the present specification (including the claims) is limited to these examples; within the context of one or more embodiments of the present description, features from the above embodiments or from different embodiments may also be combined, steps may be performed in any order, and there are many other variations of the different aspects of one or more embodiments of the present description as described above, which are not provided in detail for the sake of brevity.

While one or more embodiments of the present specification have been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description.

It is intended that the one or more embodiments of the present specification embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present disclosure are intended to be included within the scope of the one or more embodiments of the present disclosure.