CN110424805B - Light UHPC-grid concrete sandwich composite impermeable easy-repair water storage tank - Google Patents

Abstract

The invention discloses a light UHPC seepage-proofing easy-repair water storage tank and a manufacturing method thereof, wherein the water storage tank comprises an UHPC outer shell, an UHPC inner shell, an UHPC upper cover and 3D printing grid concrete, and the manufacturing method comprises the steps of hoisting the UHPC outer shell to an installation position point of the water storage tank; uniformly paving 3D printing grid concrete at the bottom of the UHPC shell to form a 3D printing grid concrete cushion; hoisting the UHPC inner shell into the UHPC outer shell and bearing the UHPC inner shell on the 3D printing grid concrete cushion; filling the space between the UHPC outer shell and the side wall of the UHPC inner shell with 3D printing grid concrete to form a main body structure of the water storage tank; the UHPC upper cover is covered on the main body structure to form a water storage tank. The UHPC-grid concrete sandwich seepage-proofing easy-repair water storage pool and the manufacturing method thereof can greatly reduce the thickness of a wall body, save building space and reduce later maintenance cost.

Description

Lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water storage tank

Technical Field

The present invention relates to the technical field of water tank manufacturing, and in particular to a lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water tank capable of greatly reducing the thickness of a wall, saving building space, and reducing later maintenance costs, and a manufacturing method thereof.

Background Art

In recent years, there are more and more multi-story buildings, high-rise buildings and large communities, so the demand for water tanks such as fire water tanks is also increasing. Water tanks not only take up a huge space, but also leak if you are not careful. Not only will it seriously affect the production and life of residents, but it will also waste huge resources for maintenance and reinforcement. Although there are many kinds of waterproof materials on the existing material market, they have poor durability and high prices, but it is still not practical to use them for large areas of water tanks, and the later maintenance costs are high.

1. Traditional water tank: The traditional reinforced concrete water tank is subjected to huge water pressure at the bottom of the tank. Ordinary reinforced concrete has large pores, which are prone to infiltration in the later stage, leading to steel corrosion, and then easily causing water leakage, and the durability is poor.

2. Traditional stainless steel water tanks have rust problems, low lateral stiffness, and are prone to buckling under high water pressure. Therefore, they cannot be used for larger water tanks and have high subsequent maintenance costs.

3. Traditional water tanks: The wall panels of traditional water tanks use concrete structures, which have low strength and are not waterproof, so the walls need to be made very thick to make up for the defects. This results in the water tanks occupying too much space, having a large self-weight and increasing construction costs.

In order to overcome the shortcomings of the above technologies, the present invention proposes an anti-seepage and easy-to-repair water storage tank. The ultra-high strength and density of UHPC not only solve the leakage problem, but also have good economic benefits; and its unique sandwich structure can give the water storage tank a secondary protection mechanism, and also avoid cumbersome secondary maintenance and renovation projects.

Therefore, there is an urgent need for a lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water storage tank and a manufacturing method thereof that can greatly reduce the thickness of the wall, reduce the dead weight, be easy to repair, save building space, and reduce the subsequent maintenance cost.

Summary of the invention

The purpose of the present invention is to provide a lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water storage tank and a manufacturing method thereof, which can greatly reduce the thickness of the wall, save building space, and reduce the later maintenance cost.

In order to achieve the above object, the technical solution provided by the present invention is: to provide a method for manufacturing a UHPC anti-seepage and easy-to-repair water storage tank, wherein the water storage tank comprises a UHPC outer shell, a UHPC inner shell, a UHPC upper cover and 3D printed grid concrete, and the manufacturing method comprises the following steps:

Hoisting the UHPC shell to the installation location of the water storage tank;

Evenly laying 3D printed grid concrete on the bottom of the UHPC shell to form a 3D printed grid concrete cushion layer;

Hoisting the UHPC inner shell into the interior of the UHPC outer shell and supporting it on the 3D printed grid concrete cushion layer;

Filling the space between the UHPC outer shell and the side wall of the UHPC inner shell with the 3D printed grid concrete to form the main structure of the water storage tank;

The UHPC upper cover is placed on the main structure to form the water storage tank.

The UHPC outer shell and the UHPC inner shell are pre-cast and cured in the factory.

Angle steels are evenly arranged on the inner wall of the UHPC outer shell and the outer wall of the UHPC inner shell, and the angle steels are used to limit the 3D printed concrete. The angle steels arranged on the inner wall of the UHPC outer shell are cast together with the UHPC outer shell, and the angle steels arranged on the outer wall of the UHPC inner shell are cast together with the UHPC inner shell.

The method also includes the step of making a connecting pipe, through which at least two of the water storage tanks can be connected together.

The manufacturing step of the connecting pipe includes: a step of connecting the connecting pipe to the UHPC outer shell and a step of connecting the connecting pipe to the UHPC inner shell:

The step of connecting the UHPC shell to the connecting pipe comprises:

A first UHPC boss is formed on the inner wall of the connection between the UHPC shell and the connecting pipe;

A first groove is formed at the center of the first UHPC boss, and a shell hole is formed through the bottom of the first groove and the outer wall of the UHPC shell for allowing the connecting pipe to pass through;

The connecting pipe passes through the housing hole;

The connecting pipe is fixed in the first groove through a first flange, and the first groove is sealed and filled with UHPC slurry;

The step of connecting the UHPC inner shell to the connecting pipe comprises:

A second UHPC boss is formed on the inner wall of the connection between the UHPC inner shell and the connecting pipe;

A second groove is formed at the center of the second UHPC boss, and an inner shell hole is formed through the bottom of the second groove and the outer wall of the UHPC inner shell for the connecting pipe to pass through;

The connecting pipe passes through the inner shell hole;

The connecting pipe is fixed in the second groove through a second flange, and the second groove is sealed and filled with UHPC slurry;

Another technical solution provided by the present invention is to provide a UHPC anti-seepage and easy-to-repair water storage tank, comprising: a UHPC outer shell, a UHPC inner shell, a UHPC upper cover and 3D printed grid concrete, wherein the UHPC outer shell and the UHPC inner shell are both integrated structures, and the 3D printed grid concrete fills the space between the UHPC outer shell and the UHPC inner shell, and the upper cover is arranged above the UHPC outer shell and the UHPC inner shell.

Angle steels are evenly arranged on the inner wall of the UHPC outer shell and the outer wall of the UHPC inner shell, and the angle steels are used to limit the 3D printed concrete.

It also includes a connecting pipe, through which two adjacent water storage tanks can be connected, and the UHPC outer shell and the UHPC inner shell of each water storage tank are sealed and connected to the connecting pipe.

A first UHPC boss is formed on the inner wall of the connection between the UHPC shell and the connecting pipe, a first groove is opened at the center of the first UHPC boss, a shell hole for the connecting pipe to pass through is opened through the bottom of the first groove and the outer wall of the UHPC shell, the connecting pipe passes through the shell hole, the connecting pipe is fixed in the first groove through a first flange, and the first groove is sealed and filled with UHPC slurry;

A second UHPC boss is formed on the inner wall of the connection between the UHPC inner shell and the connecting pipe, a second groove is opened at the center of the second UHPC boss, an inner shell hole for allowing the connecting pipe to pass through is opened through the bottom of the second groove and the outer wall of the UHPC inner shell, the connecting pipe passes through the inner shell hole, the connecting pipe is fixed in the second groove by a second flange, and the second groove is sealed and filled by UHPC slurry.

The technical solution provided by the present invention also provides a UHPC material for making a lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water storage tank, comprising the following components in parts by weight:

18-22 parts water;

Cement 108-114 parts;

Silica fume 15-19 parts;

20-25 parts of mineral powder;

Sand 100-110 parts;

15-20 parts of steel fiber;

Water reducing agent 2.5-3.8 parts;

Shrinkage reducing agent 0.4-0.6 parts;

Retarder 0.2-0.4 parts.

The present invention is easy to construct and assemble, easy to promote and apply, waterproof building materials, and easy to repair building structures, and has good economic efficiency. Compared with traditional water tanks, it has the following characteristics: it solves the problem of leakage caused by cracks in the water tank wall due to rust expansion; when the water tank structure has durability, there is no need to waste huge financial and material resources to repair and reinforce it, and directly pouring concrete into the reserved middle layer holes can form a new intact water tank. In addition, the present invention is also a lightweight water tank, which is very convenient in the process of processing, transportation and assembly. The lightness is reflected in: the present invention is composed of UHPC outer shell, UHPC inner shell, and 3D printed grid concrete, which can be made thinner than traditional concrete. Furthermore, UHPC has the advantage of being more dense, higher strength and better durability than traditional concrete, and also has self-healing properties. Compared with stainless steel water tanks, there is no problem of corrosion and low lateral stiffness.

The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a flow chart showing a method for manufacturing a UHPC anti-seepage and easy-to-repair water storage tank according to the present invention.

FIG2 is a schematic diagram showing an embodiment of a lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water storage tank according to the present invention.

FIG3 is a schematic diagram showing the hoisting of the lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water storage tank shown in FIG2 in a foundation pit.

FIG4 shows a flow chart of manufacturing a connecting pipe for a lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water storage tank according to the present invention.

FIG. 5 is a flowchart showing the steps of connecting the connecting pipes between the UHPC outer shell and the UHPC inner shell.

FIG. 6 is a schematic diagram showing the structure of connecting the connecting pipes between the UHPC outer shell and the UHPC inner shell.

DETAILED DESCRIPTION

Now, embodiments of the present invention will be described with reference to the accompanying drawings, in which like element numbers represent like elements. As described above, with reference to FIGS. 1, 2, 3, and 4, a method for manufacturing a UHPC impermeable and easy-to-repair water storage tank according to an embodiment of the present invention is provided, wherein the water storage tank 100 comprises a UHPC outer shell 1, a UHPC inner shell 2, a UHPC upper cover (not shown in the figure), and a 3D printed grid concrete 3, wherein the UHPC outer shell 1 and the UHPC inner shell 2 are both integrally formed structures of a bottom plate and a side plate, and the shapes of the UHPC outer shell 1 and the UHPC inner shell 2 are generally rectangular, long waist or cylindrical structures, including a bottom plate and an integrally formed side plate connected to the bottom plate.

In all the embodiments of the present invention, the shapes of the UHPC outer shell 1 and the UHPC inner shell 2 are both rectangular as an example for explanation.

The volume of the UHPC outer shell 1 is slightly larger than that of the UHPC inner shell 2, so that the UHPC inner shell 2 is embedded in the UHPC outer shell 1, and the 3D printed grid concrete 3 is used as a sandwich layer between the UHPC outer shell 1 and the UHPC inner shell 2. When the water storage tank 100 is filled with water, the water pressure on the UHPC inner shell 2 is transmitted to the 3D printed grid concrete 3 through the bottom wall and side walls of the UHPC inner shell 2, and then transmitted to the bottom wall and side walls of the UHPC outer shell 1 through the 3D printed grid concrete 3, so that the entire structure is as evenly stressed as possible.

The method for manufacturing the UHPC anti-seepage and easy-to-repair water storage tank according to the embodiment of the present invention comprises the following steps:

S001, hoisting the UHPC shell to the installation position of the water tank; it should be noted that before the water tank 100 is manufactured, the construction land of the water tank 100 needs to be tidied and leveled, and when the UHPC shell 1 is hoisted to the installation position, ensure that the UHPC shell 1 is placed flat.

S002, 3D printed grid concrete is evenly laid on the bottom of the UHPC shell to form a 3D printed grid concrete cushion layer; as mentioned above, the UHPC inner shell 2 is embedded in the UHPC shell 1, and the 3D printed grid concrete 3 is used as a sandwich layer between the UHPC shell 1 and the UHPC inner shell 2. The space between the UHPC shell 1 and the UHPC inner shell 2 is relatively narrow. The 3D printed grid concrete 3 is used as a sandwich layer to minimize the construction materials and to transfer the water pressure on the UHPC inner shell 2 as evenly as possible through the sandwich layer, i.e., the 3D printed grid concrete 3, to the UHPC shell 1. Therefore, after step S001, when the UHPC shell 1 is hoisted at the predetermined installation position, before entering step S003, the 3D printed grid concrete 3 is evenly laid on the bottom of the UHPC shell 1 to form a 3D printed grid concrete cushion layer, thereby preparing to enter step S003. Specifically, in fact, the inner wall of the UHPC shell 1 (including the inner bottom wall and the inner side wall of the UHPC shell 1) is evenly arranged with angle steels 4, and the angle steels 4 arranged on the inner wall of the UHPC shell 1 are cast together with the UHPC shell 1, and the 3D printed grid concrete 3 can be well positioned by the angle steels 4.

S003, hoisting the UHPC inner shell to the inside of the UHPC outer shell, and bearing on the 3D printed grid concrete cushion layer; as mentioned above, the inner wall of the UHPC outer shell 1 (including the inner bottom wall and the inner side wall of the UHPC outer shell 1) is evenly arranged with angle steels 4, so the angle steels 4 can well position the 3D printed grid concrete 3. When the UHPC inner shell 2 is hoisted to the inside of the UHPC outer shell 1, the 3D printed grid concrete 3 will not be displaced under the action of the angle steels 4, ensuring that the 3D printed grid concrete cushion layer plays a predetermined bearing role.

S004, filling the space between the side walls of the UHPC outer shell and the UHPC inner shell with the 3D printed grid concrete to form the main structure of the water storage tank; after step S003, the UHPC inner shell 2 has been hoisted, and the space between the side walls of the UHPC outer shell 1 and the UHPC inner shell 2 is filled with the 3D printed grid concrete 3. After the 3D printed grid concrete 3 fills the space between the side walls of the UHPC outer shell 1 and the UHPC inner shell 2, the main structure of the water storage tank 100 is formed.

S004, installing the UHPC upper cover on the main structure to form the water storage tank.

In one embodiment, the UHPC shell 1 and the UHPC inner shell 2 are pre-cast and cured in the factory. In this embodiment, the water tank is preferably made into a standard building, and the UHPC shell 1, the UHPC inner shell 2, and the 3D printed grid concrete 3 are standard test pieces, so that the UHPC shell 1 and the UHPC inner shell 2 can be prefabricated in the factory. Factory production can greatly improve production efficiency and reduce production costs. When transported to the site for construction, professional staff will carry out the construction, which can greatly improve the efficiency of on-site construction, as well as improve the reliability of on-site construction and the stability of operations.

As mentioned above, the water tank 100 is a standard building, which is prefabricated in the factory and transported to the site for installation. The specifications of the water tank 100 can be customized according to the needs of most customers. However, due to the limitations of transportation conditions and on-site construction working conditions, the volume of a single water tank 100 may not meet the user's water demand. Therefore, multiple water tanks 100 need to be connected to meet the user's water demand.

Referring to FIGS. 4 and 5 , in one embodiment, the steps of making the connecting pipe include: a step of connecting the connecting pipe to the UHPC outer shell and a step of connecting the connecting pipe to the UHPC inner shell:

The step of connecting the UHPC shell to the connecting pipe comprises:

S101 A first UHPC boss is formed on the inner wall of the connection between the UHPC shell and the connecting pipe; referring to FIG5 , the first UHPC boss 5 formed on the UHPC shell 1 is an integrally formed structure.

S102: a first groove is made at the center of the first UHPC boss, and a shell hole for the connecting pipe to pass through is made through the bottom of the first groove and the outer wall of the UHPC shell; the first groove 6 is made at the center of the first UHPC boss 5, and the connecting pipe 7 passes through the shell hole 8.

S103 the connecting pipe passes through the housing hole; refer to FIG. 5 for the state in which the connecting pipe 7 passes through the housing hole 8 .

S104: the connecting pipe is fixed in the first groove through a first flange, and the first groove is sealed and filled with UHPC slurry;

In one embodiment, the connecting pipe 7 and the first flange 9 are both made of steel, so the inner ring of the first flange 9 can be sealed and welded to the outer wall of the connecting pipe 7, so that the connecting pipe 7 can be well fixed to the bottom of the first groove 6 through the first flange 9, and the first flange 9 and the bottom of the first groove 6 need to be sealed. After the bottom of the first groove 6 accommodates the first flange 9, the remaining space of the first groove 6 is sealed and filled with UHPC slurry.

The step of connecting the UHPC inner shell to the connecting pipe comprises:

S201 A second UHPC boss is formed on the inner wall of the connection between the UHPC inner shell and the connecting pipe; referring to FIG5 , the second UHPC boss 5 a formed on the UHPC inner shell 2 is an integrally formed structure.

S202: A second groove is made at the center of the second UHPC boss, and an inner shell hole is made through the bottom of the second groove and the outer wall of the UHPC inner shell for the connecting pipe to pass through; the second groove 6a is made at the center of the second UHPC boss 5a, and the connecting pipe 7 passes through the inner shell hole 8a.

S203 the connecting pipe passes through the inner shell hole;

S204: the connecting pipe is fixed in the second groove through a second flange, and the second groove is sealed and filled with UHPC slurry;

In one embodiment, the connecting pipe 7 and the second flange 9a are both made of steel, so the inner ring of the second flange 9a can be sealed and welded to the outer wall of the connecting pipe 7, so that the connecting pipe 7 can be well fixed to the bottom of the second groove 6a through the second flange 9a, and the second flange 9a and the bottom of the second groove 6a need to be sealed. After the bottom of the second groove 6a accommodates the second flange 9a, the remaining space of the second groove 6a is sealed and filled with UHPC slurry.

2 and 3 , a technical solution provided by an embodiment of the present invention provides a lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water storage tank 100, comprising: a UHPC outer shell 1, a UHPC inner shell 2, a UHPC upper cover (not shown in the figure) and a 3D printed grid concrete 3, wherein the UHPC outer shell 1 and the UHPC inner shell 2 are both integral structures, and the 3D printed grid concrete 3 is filled in the space between the UHPC outer shell 1 and the UHPC inner shell 2, and the upper cover is arranged above the UHPC outer shell 1 and the UHPC inner shell 2.

It should be noted that the UHPC outer shell 1 and the UHPC inner shell 2 are both integral structures, which means that the bottom plate and the side plate of the UHPC outer shell 1 and the UHPC inner shell 2 are integrally formed.

In one embodiment, referring to FIG. 3 , angle steels 4 are evenly arranged on the inner wall of the UHPC outer shell 1 and the outer wall of the UHPC inner shell 2 , and the angle steels 4 are used to limit the 3D printed concrete 3 .

In one embodiment, referring to FIG. 6 , a connecting pipe 7 is further included, and two adjacent water storage tanks can be connected via the connecting pipe 7 , and the UHPC outer shell 1 and the UHPC inner shell 2 of each water storage tank are sealed and connected to the connecting pipe 7 .

Referring to Figure 6, a first UHPC boss 5 is formed on the inner wall of the connection between the UHPC shell 1 and the connecting pipe 7. A first groove 6 is opened at the center of the first UHPC boss 5. A shell hole 8 for allowing the connecting pipe 7 to pass through is opened through the bottom of the first groove 6 and the outer wall of the UHPC shell 1. The connecting pipe 7 passes through the shell hole 8. The connecting pipe 7 is fixed in the first groove 6 through a first flange 9, and the first groove 6 is sealed and filled with UHPC slurry.

The connecting pipe 7 and the first flange 9 are both made of steel, so the inner ring of the first flange 9 can be sealed and welded to the outer wall of the connecting pipe 7, so that the connecting pipe 7 can be well fixed to the bottom of the first groove 6 through the first flange 9, and the first flange 9 and the bottom of the first groove 6 need to be sealed. After the bottom of the first groove 6 accommodates the first flange 9, the remaining space of the first groove 6 is sealed and filled with UHPC slurry.

A second UHPC boss is formed on the inner wall of the connection between the UHPC inner shell 2 and the connecting pipe 7. A second groove 6a is provided at the center of the second UHPC boss 5a. An inner shell hole 8a for allowing the connecting pipe 7 to pass through is provided through the bottom of the second groove 6a and the outer wall of the UHPC inner shell 2. The connecting pipe 7 passes through the inner shell hole 8a. The connecting pipe 7 is fixed in the second groove 6a through a second flange 9a, and the second groove 6a is sealed and filled with UHPC slurry.

In one embodiment, the connecting pipe 7 and the second flange 9a are both made of steel, so the inner ring of the second flange 9a can be sealed and welded to the outer wall of the connecting pipe 7, so that the connecting pipe 7 can be well fixed to the bottom of the second groove 6a through the second flange 9a, and the second flange 9a and the bottom of the second groove 6a need to be sealed. After the bottom of the second groove 6a accommodates the second flange 9a, the remaining space of the second groove 6a is sealed and filled with UHPC slurry.

The ultra-high performance concrete in the present invention, referred to as UHPC (Ultra-High Performance Concrete), has ultra-high durability and ultra-high mechanical properties (compression, tension and high toughness). Its basic formulation principle is: by improving the fineness and activity of the components, not using coarse aggregate, the defects (pores and microcracks) inside the material are minimized to obtain ultra-high strength and high durability. The basic raw materials of UHPC mainly include cement, silica fume, ultra-high efficiency water reducer, fine aggregate and steel fiber. Based on the particle close packing theory, cement hydration theory, and random fiber intersection theory, the optimal particle grading and steel fiber size and dosage are calculated, so that the concrete can achieve extremely high density, extremely fine pore size, and interlaced continuous steel fiber mesh. It has a non-connected pore structure inside, has a high ability to resist gas and liquid infiltration, and can greatly improve durability compared with traditional concrete and high performance concrete (HPC). Its content includes the following components by weight:

The technical solution provided by the present invention also provides a UHPC material for making a lightweight UHPC-grid concrete sandwich composite anti-seepage and easy-to-repair water storage tank, comprising the following components in parts by weight:

18-22 parts water;

Cement 108-114 parts;

Silica fume 15-19 parts;

20-25 parts of mineral powder;

Sand 100-110 parts;

15-20 parts of steel fiber;

Water reducing agent 2.5-3.8 parts;

Shrinkage reducing agent 0.4-0.6 parts;

Retarder 0.2-0.4 parts.

The low permeability and high durability of the UHPC of the present invention are mainly due to the following reasons:

In the crack-free state, the water and air permeability of the UHPC matrix is very low, and it has high corrosion resistance and reinforcement protection capabilities; in the high tensile and bending strain and micro-crack states, the permeability of UHPC is also relatively low. This is because when the matrix is damaged, the micro-cracks can also use the humidity in the air to further hydrate and heal again. The "continued" hydration of cement can not only seal the micro-cracks and reduce permeability, but also play the role of "cementing" cracks, and to a certain extent restore the mechanical properties of concrete that have been reduced by cracks. Therefore, UHPC can maintain its initial strength so that it can be used in highly corrosive environments.

Since calcium hydroxide, the cement hydration product most susceptible to corrosion in concrete, is almost completely converted into calcium silicate gel by reaction with silica fume in the UHPC of the present invention; in addition, the acid resistance of UHPC is more than 5 times higher than that of ordinary mortar, so UHPC can also maintain good performance in water with high chloride ion concentration.

The randomly distributed steel fibers in the UHPC of the present invention can delay the development of cracks in the matrix and make it develop in multiple cracks, providing the matrix with sufficient time and space for further hydration, so that the cracks are gradually healed and the matrix is restored to a very high anti-seepage capacity.

The use of a shrinkage reducing agent in the present invention helps to reduce the shrinkage of UHPC. The condensation shrinkage before water evaporation can make the structure denser, but the volume shrinkage after condensation will evaporate water to form internal pores, so adding a shrinkage reducing agent can reduce the shrinkage associated with the risk of cracks, thereby making the structure less porous and denser.

Even if the UHPC inner shell leaks, the UHPC outer shell can still prevent leakage; if repair is required, the 3D printed grid concrete can be filled with UHPC material. The repair process is convenient and fast, which increases the service life and reduces the subsequent maintenance procedures and costs.

The impermeability test is carried out using the "Concrete Impermeability Test Method" in the T0529-94 standard:

(1) Prepare samples: prepare 6 samples according to Examples 1-6 shown in Table 1.

Table 1 Example is a table of the contents of components 1-6 (unit: g)

Components Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 water 18 19 20.5 twenty one 21.5 twenty two cement 108 109 111 112 113 114 Silica Fume 15 16 17 18 18.5 19 Mineral powder 20 twenty one twenty two twenty three twenty four 25 sand 100 102 104 106 108 110 Steel Fiber 15 16 17 18 19 20 Water reducing agent 2.5 2.8 3.2 3.5 3.7 3.8 Retarder 0.2 0.25 0.3 0.35 0.38 0.4

(2) The above 6 samples were cured for 28 days.

(3) Test operation: the test water pressure starts from 0.1 MPa and increases by 0.1 MPa every 8 hours, and the sample end surface is observed at any time. The test water pressure is increased until water seepage is found on the surface of each sample, and the water pressure at this time is recorded (this can determine the maximum depth of the water storage tank of the present invention).

Table 2 is a water pressure table of 1-6 impermeability tests:

Water pressure value Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 H(MPa) 1.15 1.28 1.36 1.38 1.33 1.39

Combined with Table 2, it can be seen that the six embodiments of the UHPC of the present invention all have relatively good impermeability, and the stability of the impermeability grade is above the P10 level, which meets the impermeability requirements of ultra-high performance concrete.

The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims (8)

1. The manufacturing method of the UHPC seepage-proofing easy-repair water storage tank comprises a UHPC outer shell, a UHPC inner shell, a UHPC upper cover and 3D printing grid concrete, and is characterized by comprising the following steps of:

Hoisting the UHPC shell to an installation position point of the water storage tank;

uniformly paving 3D printing grid concrete at the bottom of the UHPC shell to form a 3D printing grid concrete cushion;

Hoisting the UHPC inner shell into the UHPC outer shell and bearing the UHPC inner shell on the 3D printing grid concrete cushion;

Filling the space between the side walls of the UHPC outer shell and the UHPC inner shell with the 3D printing grid concrete to form a main body structure of the water storage tank;

and covering the UHPC upper cover on the main body structure to form the water storage pool.

2. The method for manufacturing the UHPC seepage-proofing easy-repair water storage pool, which is characterized in that the UHPC outer shell and the UHPC inner shell are poured and cured in advance in a factory.

3. The manufacturing method of the UHPC seepage-proofing easy-repair water storage pool according to claim 2, wherein angle steel is uniformly distributed on the inner wall of the UHPC outer shell and the outer wall of the UHPC inner shell, the angle steel is used for limiting the 3D printing grid concrete, the angle steel distributed on the inner wall of the UHPC outer shell and the UHPC outer shell are cast together, and the angle steel distributed on the outer wall of the UHPC inner shell and the UHPC inner shell are cast together.

4. The method of manufacturing a UHPC impermeable easy-repair reservoir according to claim 1, further comprising the step of manufacturing a communication pipe through which at least two of said reservoirs can be connected together.

5. The method for manufacturing the UHPC impermeable and repairable water storage tank of claim 4, wherein the manufacturing step of the communicating pipe comprises the following steps: and a step of connecting a communicating pipe to the UHPC outer shell and a step of connecting a communicating pipe to the UHPC inner shell:

The UHPC shell connection communicating pipe comprises the following steps:

forming a first UHPC boss on the inner wall of the joint of the UHPC shell and the communicating pipe;

A first groove is formed in the center of the first UHPC boss, and a shell hole for the communicating pipe to pass through is formed through the groove bottom of the first groove and the outer wall of the UHPC shell;

The communicating pipe passes through the shell hole;

The communicating pipe is fixed in the first groove through a first flange plate, and the first groove is sealed and filled through UHPC slurry;

The UHPC inner shell connecting communicating pipe comprises the following steps:

Forming a second UHPC boss on the inner wall of the joint of the UHPC inner shell and the communicating pipe;

a second groove is formed in the center of the second UHPC boss, and an inner shell hole for the communicating pipe to pass through is formed through the bottom of the second groove and the outer wall of the UHPC inner shell;

the communicating pipe passes through the inner shell hole;

The communicating pipe is fixed in the second groove through a second flange plate, and the second groove is filled in a sealing mode through UHPC slurry.

6. The utility model provides a light-duty UHPC-net concrete sandwich is compound prevents seepage and easily repairs tank which characterized in that includes: the UHPC outer shell, the UHPC inner shell, the UHPC upper cover and the 3D printing grid concrete are of an integrated structure, the 3D printing grid concrete is filled in the space between the UHPC outer shell and the UHPC inner shell, and the upper cover is covered above the UHPC outer shell and the UHPC inner shell;

Angle steel is uniformly distributed on the inner wall of the UHPC outer shell and the outer wall of the UHPC inner shell, and the angle steel is used for limiting the 3D printing grid concrete.

7. The lightweight UHPC-grid concrete sandwich composite impermeable easy-repair water storage tank of claim 6, further comprising a communicating pipe through which two adjacent water storage tanks can communicate, wherein the UHPC outer shell and the UHPC inner shell of each water storage tank are in sealing connection with the communicating pipe.

8. The lightweight UHPC-grid concrete sandwich composite impermeable easy repair tank of claim 7, wherein,

A first UHPC boss is formed on the inner wall of the joint of the UHPC shell and the communicating pipe, a first groove is formed in the center of the first UHPC boss, a shell hole for the communicating pipe to pass through is formed through the groove bottom of the first groove and the outer wall of the UHPC shell, the communicating pipe passes through the shell hole, the communicating pipe is fixed in the first groove through a first flange plate, and the first groove is filled in a sealing way through UHPC slurry;

The inner wall shaping of UHPC inner shell with communicating pipe junction has a second UHPC boss, the central department of second UHPC boss has seted up the second recess, runs through the tank bottom of second recess with the inner shell hole that is used for letting communicating pipe pass is seted up to the outer wall of UHPC inner shell, communicating pipe passes the inner shell hole, communicating pipe passes a second ring flange is fixed in the second recess to through UHPC thick liquids pair the second recess is sealed to fill.