Gravity energy storage underground space construction method

Abstract

The invention relates to the technical field of well site construction methods, and particularly discloses a gravity energy storage underground space construction method which specifically comprises the following steps: drilling downwards at a preset site to form a well-type underground space, rolling a gas film template made of a flexible material at a well mouth of the well-type underground space, emptying impurities in the well-type underground space, and constructing a gravity energy storage underground space. The bottom end of the gas film template is provided with the circular-truncated-cone-shaped template and the umbrella rib primer, one end of the circular-truncated-cone-shaped template is connected with the gas film template, and the other end of the circular-truncated-cone-shaped template is connected with the umbrella rib primer. The pouring solidification process of cement on the well wall can be completed only by putting the gas film formwork into the well, the formwork does not need to be taken out subsequently, time consumption is short, operation is easy and convenient, time and labor are saved, the construction efficiency is greatly improved, and the construction cost of the well position is saved.

Description

Technical Field

[0001] This invention relates to the field of well site construction methods, and in particular to a method for constructing underground space for gravity energy storage. Background Technology

[0002] Gravity energy storage technology refers to the vertical lifting and lowering of a heavy object from underground by a drive motor under the traction of a steel wire rope, thereby completing the conversion between gravitational potential energy and electrical energy. Gravity energy storage equipment consists of multiple energy storage units. An energy storage unit typically includes a set of heavy objects, an integrated drive generator, and a well site excavated on the ground. During the construction of the well site, a building template needs to be placed into the well and attached to the inner wall of the well. Concrete is then injected into the gap between the building template and the inner wall of the well. After the concrete solidifies, the well site is completed.

[0003] To prevent the formwork from deforming under pressure during concrete pouring, the traditional construction method involves placing rigid formwork made of steel, wood, or plastic into the well. For ease of installation, the rigid formwork needs to be lowered into the well in batches. After the concrete has solidified, some of the formwork is removed from the well. The process of lowering and removing the formwork in batches is not only time-consuming but also very cumbersome. The entire construction process is time-consuming and labor-intensive, affecting construction efficiency and resulting in high construction costs for the well.

[0004] Therefore, it is necessary to propose a gravity-based energy storage underground space construction method to replace traditional building formwork, simplify construction costs, and improve construction efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of time-consuming and labor-intensive formwork construction, low construction efficiency, and high construction cost in the existing well site construction process. A gravity energy storage underground space construction method is provided.

[0006] The technical solution of this invention is: A method for constructing an underground space for gravity energy storage specifically includes the following steps: Drill downwards at a predetermined location to form a well-shaped underground space, roll up a flexible air-supported membrane template at the wellhead of the well-shaped underground space, and clear impurities from the well-shaped underground space; At the bottom of the air-supported membrane template, there is a frustum-shaped template and an umbrella-shaped guide. One end of the frustum-shaped template is connected to the air-supported membrane template, and the other end of the frustum-shaped template is connected to the umbrella-shaped guide. The umbrella-shaped guide is vertically lowered into the bottom of the well-shaped underground space. The diameter of the umbrella-shaped guide matches the diameter of the well-shaped underground space. The umbrella-shaped guide can expand the air-supported membrane template so that it is coaxial with the well-shaped underground space. There is a pouring gap between the outer side of the air-supported membrane formwork and the inner wall of the well-shaped underground space. The inner side of the air-supported membrane formwork is equipped with an inner cavity. The cement pumping hose is inserted into the bottom of the well-shaped underground space through the inner cavity of the air-supported membrane formwork. Cement is poured into the bottom of the well-shaped underground space and submerges the umbrella rib and the frustum-shaped formwork. The cement pumping hose is then removed. After the cement at the bottom of the well-shaped underground space has solidified, gas is injected into the air-supported membrane template to make it expand. A cement pumping hose is then lowered into the pouring gap and lowered to the bottom of the pouring gap to pour cement. The cement pumping hose is then raised according to the cement interface height until it is completely removed from the pouring gap. At this point, the pouring of cement is stopped. After the cement in the pouring gap has solidified, the water in the inner cavity of the air-supported membrane template is extracted.

[0007] Furthermore, the method includes the following steps: a pouring groove is opened at the wellhead of the well-shaped underground space, the pouring groove is connected to the pouring gap, and the cement pumping hose passes through the pouring groove and enters the pouring gap.

[0008] Furthermore, four casting grooves are provided, and the four casting grooves are distributed circumferentially at the wellhead of the well-shaped underground space.

[0009] Furthermore, the frustum-shaped template is frustum-shaped and is located between the umbrella rib inlet and the air-film template.

[0010] Furthermore, a cylindrical template is provided between the frustum-shaped template and the umbrella rib guide. One end of the cylindrical template is connected to the frustum-shaped template, and the other end of the cylindrical template is connected to the umbrella rib guide. Since the umbrella rib guide has a large diameter, the cylindrical template can provide a shape transition and buffer between the umbrella rib guide and the frustum-shaped template, preventing stress concentration.

[0011] Furthermore, the top diameter of the frustum-shaped template is the same as that of the air-supported membrane template, and the cylindrical template is cylindrical. The bottom diameter of the frustum-shaped template, the diameter of the cylindrical template, and the diameter of the umbrella rib are all the same. The fact that all three have the same diameter can ensure coaxiality with the well-shaped underground space to the greatest extent. When cement is poured into the pouring gap, the cement thickness in all places can be uniform.

[0012] Furthermore, the frustum-shaped template, air-supported membrane template, and cylindrical template are all wound up at the wellhead of the underground well-shaped space by a winding machine. The winding machine can sequentially lower the cylindrical template, frustum-shaped template, and air-supported membrane template into the underground well-shaped space, and can roll up the air-supported membrane template, cylindrical template, and frustum-shaped template into a roll for easy storage and movement.

[0013] This invention discloses a method for constructing a gravity energy storage underground space. First, a rib-shaped induction device is lowered into the well, which then pulls a flexible air-supported membrane template into the well. Because the diameter of the rib-shaped induction device matches the diameter of the well-shaped underground space, it can land at the exact center of the well bottom. This ensures that the air-supported membrane template, after being expanded by the rib-shaped induction device, is also located at the center of the well-shaped underground space, making the air-supported membrane template coaxial with the well-shaped underground space. This coaxiality facilitates subsequent cement pouring. Since the air-supported membrane template is cylindrical and made of flexible material, cement is first poured into the well bottom through the inner cavity of the air-supported membrane template. On the one hand, the cement can fix the rib-shaped induction device at the bottom of the well, preventing it from shaking or shifting; on the other hand, after the cement has solidified above the frustum-shaped template, the air-supported membrane template is inflated to expand it. The expansion structure can withstand a certain amount of extrusion without deformation. Cement is poured into the pouring gaps, and the frustum-shaped template and the solidified cement inside it provide support for the newly poured cement, preventing the bottom frustum-shaped template from being deformed due to excessive extrusion. This continues until the pouring gaps are completely filled with cement. After the cement in the pouring gaps has solidified, the water inside the cavity is pumped out, thus completing the construction of the well. Compared with traditional technology, this well construction method does not involve the process of batching and removing the templates from the well. It only requires lowering the air-supported membrane template into the well to complete the process of pouring and solidifying the cement on the well wall. Similarly, there is no need to remove the template afterward. It is time-saving, simple to operate, saves time and labor, greatly improves construction efficiency, and saves construction costs. Attached Figure Description

[0014] Figure 1 This is a flowchart of the gravity energy storage underground space construction method of the present invention; Figure 2 This is a cross-sectional view of the combination of well-shaped underground space and air-supported membrane template of the present invention; Figure 3 This is a front view of the umbrella rib connector of the present invention; Figure 4 This is a top view of the umbrella rib connector of the present invention; Figure 5 This is a left view of the umbrella rib connector of the present invention; Figure 6 This is a diagram of the well formation structure of the present invention.

[0015] Attached reference numerals: 1. Well-shaped underground space; 2. Air-supported membrane formwork; 3. Frustum-shaped formwork; 4. Umbrella-shaped guide rib; 5. Pouring gap; 6. Inner cavity; 7. Column formwork; 8. Base. Detailed Implementation

[0016] To make the technical means, technical features, inventive purpose and technical effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0017] Example 1: like Figure 1 and Figure 2 As shown, this embodiment provides a method for constructing a gravity energy storage underground space, specifically including the following steps: drilling downwards at a predetermined location to form a well-shaped underground space 1; rolling up a flexible air-supported membrane template 2 at the wellhead of the well-shaped underground space 1; clearing impurities from the well-shaped underground space 1; providing a frustum-shaped template 3 and an umbrella-shaped guide 4 at the bottom end of the air-supported membrane template 2; connecting one end of the frustum-shaped template 3 to the air-supported membrane template 2, and connecting the other end of the frustum-shaped template 3 to the umbrella-shaped guide 4 via a cylindrical template 7; vertically lowering the umbrella-shaped guide 4 into the bottom of the well-shaped underground space 1, with the umbrella-shaped guide 4 matching the diameter of the well-shaped underground space 1, such as... Figure 3 and Figure 5 As shown, a base 8 is welded to the center below the umbrella-shaped inlet 4. The base 8 coincides with the center of the well bottom, thus ensuring that the umbrella-shaped inlet 4 is located on the central axis of the well-shaped underground space 1. This allows the air-supported membrane template 2 to be coaxial with the well-shaped underground space 1 when the umbrella-shaped inlet 4 expands it. Figure 4 As shown, the umbrella rib guide 4 has a hollow structure, which allows cement to flow into the inner cavity 6.

[0018] Preferably, the cylindrical template 7 between the frustum-shaped template 3 and the umbrella rib guide 4 has one end connected to the frustum-shaped template 3 and the other end connected to the umbrella rib guide 4. Since the umbrella rib guide 4 has a large diameter, the cylindrical template 7 can provide a shape transition and buffer between the umbrella rib guide 4 and the frustum-shaped template 3 to prevent stress concentration.

[0019] A pouring gap 5 exists between the outer side of the air-supported membrane template 2 and the inner wall of the well-shaped underground space 1. An inner cavity 6 is provided on the inner side of the air-supported membrane template 2. A cement pumping hose is inserted through the inner cavity 6 of the air-supported membrane template 2 to the bottom of the well-shaped underground space 1. Cement is poured into the bottom of the well-shaped underground space 1, submerging the umbrella-shaped guide 4 and the frustum-shaped template 3. The cement pumping hose is then removed. After the cement at the bottom of the well-shaped underground space 1 has solidified, gas is injected into the air-supported membrane template 2 to cause it to expand. Preferably, the gas pressure is 3 MPa. A cement pumping hose is lowered into the pouring gap 5. The cement pumping hose is lowered to the bottom of the pouring gap 5 and cement is poured. The cement pumping hose is raised according to the cement interface height until it is completely removed from the pouring gap 5. At this time, the cement pouring is stopped. After the cement in the pouring gap 5 solidifies, the water in the inner cavity 6 of the air-supported membrane template 2 is extracted. Preferably, the air-supported membrane template 2, the frustum template 3, and the cylindrical template 7 are all made of flexible materials such as PVC and are integrally molded structures. The umbrella rib 4 is fixed to the cylindrical template 7 by screws.

[0020] Preferably, the method further includes the following steps: a pouring groove is opened at the wellhead of the well-shaped underground space 1, the pouring groove is connected to the pouring gap 5, and the cement pumping hose passes through the pouring groove and enters the pouring gap 5.

[0021] Preferably, four casting grooves are provided, and the four casting grooves are distributed circumferentially at the wellhead of the well-shaped underground space 1.

[0022] Preferably, the frustum-shaped template 3 is frustum-shaped and is located between the umbrella rib inlet 4 and the air film template 2.

[0023] Preferably, the cement pumped by the cement pumping hose can also be replaced by concrete slurry. The construction personnel can decide which building material to use based on the specific working conditions.

[0024] Preferably, the top diameter of the frustum-shaped template 3 is the same as the diameter of the air-supported membrane template 2, the cylindrical template 7 is cylindrical, and the bottom diameter of the frustum-shaped template 3, the diameter of the cylindrical template 7, and the diameter of the umbrella rib guide 4 are all the same. The fact that the three have the same diameter can ensure the coaxiality with the well-shaped underground space 1 to the greatest extent. When cement is poured into the pouring gap 5, the cement thickness at each place can be uniform.

[0025] Preferably, the frustum-shaped template 3, the air-supported membrane template 2, and the cylindrical template 7 are all wound up at the wellhead of the underground well-shaped space by a winding machine. The winding machine can sequentially lower the cylindrical template 7, the frustum-shaped template 3, and the air-supported membrane template 2 into the underground well-shaped space. The winding machine can roll up the air-supported membrane template 2, the cylindrical template 7, and the frustum-shaped template 3 into a roll, which is convenient for storage and movement.

[0026] During construction, such as Figure 6As shown, the umbrella-shaped guide 4 is first lowered into the well, thereby pulling the flexible air-supported membrane template 2 into the well. Since the diameter of the umbrella-shaped guide 4 matches that of the well-shaped underground space 1, the umbrella-shaped guide 4 can fall to the exact center of the bottom of the well. This allows the air-supported membrane template 2, after being opened by the umbrella-shaped guide 4, to also be located at the center of the well-shaped underground space 1, making the air-supported membrane template 2 coaxial with the well-shaped underground space 1. The coaxial air-supported membrane template 2 facilitates subsequent cement pouring. Since the air-supported membrane template 2 is cylindrical and made of flexible material, cement is first poured into the bottom of the well through the inner cavity 6 of the air-supported membrane template 2. At this time, the distance between the cement pumping hose and the bottom of the well is preferably 30-40 cm. Cement pumping starts from this point. On the one hand, the cement can fix the umbrella-shaped guide 4 to the bottom of the well, preventing it from shaking or shifting. On the other hand, after the cement submerges the frustum-shaped template 3 and solidifies, First, the air-supported membrane template 2 is inflated to expand and withstand a certain amount of pressure without deformation. Cement is then poured into the pouring gap 5. The frustum-shaped template 3 and the solidified cement inside it provide support for the newly poured cement, preventing the bottom frustum-shaped template 3 from being deformed due to excessive pressure. This process continues until the pouring gap 5 is completely filled with cement. After the cement in the pouring gap 5 has solidified, the water in the inner cavity 6 is pumped out, thus completing the construction of the well. Compared with traditional technology, this well construction method does not involve the traditional process of inserting and removing templates in batches. It only requires lowering the air-supported membrane template 2 into the well to complete the process of pouring and solidifying cement on the well wall. Similarly, it does not require subsequent removal of the template. This method is time-saving, simple to operate, saves time and labor, greatly improves construction efficiency, and reduces the construction cost of the well.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the claims of this invention should fall within the technical scope of this invention.

Claims

1. A method for constructing an underground space for gravity energy storage, characterized in that, Specifically, the following steps are included: Drill downwards at a predetermined location to form a well-shaped underground space (1), roll up a flexible material air film template (2) at the wellhead of the well-shaped underground space (1), and clear the impurities inside the well-shaped underground space (1); At the bottom of the air-supported membrane template (2), there is a frustum template (3) and an umbrella rib (4). One end of the frustum template (3) is connected to the air-supported membrane template (2), and the other end of the frustum template (3) is connected to the umbrella rib (4). The umbrella rib (4) is vertically lowered into the bottom of the well-shaped underground space (1). The diameter of the umbrella rib (4) matches that of the well-shaped underground space (1). The umbrella rib (4) can open the air-supported membrane template (2) so that it is coaxial with the well-shaped underground space (1). There is a pouring gap (5) between the outer side of the air-supported membrane template (2) and the inner wall of the well-shaped underground space (1). The inner side of the air-supported membrane template (2) is provided with an inner cavity (6). The cement pumping hose is inserted into the bottom of the well-shaped underground space (1) through the inner cavity (6) of the air-supported membrane template (2). Cement is poured into the bottom of the well-shaped underground space (1) and submerges the umbrella rib guide (4) and the frustum-shaped template (3). The cement pumping hose is then removed. After the cement at the bottom of the well-shaped underground space (1) has solidified, gas is injected into the air-supported membrane template (2) to make it expand. The cement pumping hose is lowered into the pouring gap (5). The cement pumping hose is lowered to the bottom of the pouring gap (5) and cement is poured. The cement pumping hose is lifted according to the cement interface height until it is completely lifted out of the pouring gap (5). At this time, the pouring of cement is stopped. After the cement in the pouring gap (5) has solidified, the water in the inner cavity (6) of the air-supported membrane template (2) is extracted.

2. The method for constructing a gravity energy storage underground space according to claim 1, characterized in that, It also includes the following steps: A casting groove is opened at the wellhead of the well-shaped underground space (1), and the casting groove is connected to the casting gap (5). The cement pumping hose passes through the casting groove and enters the casting gap (5).

3. The method for constructing a gravity energy storage underground space according to claim 2, characterized in that: The casting groove is provided in four places, and the four casting grooves are distributed circumferentially at the wellhead of the well-shaped underground space (1).

4. The method for constructing a gravity energy storage underground space according to claim 1, characterized in that: The frustum-shaped template (3) is frustum-shaped and is located between the umbrella rib inlet (4) and the air film template (2).

5. The method for constructing a gravity energy storage underground space according to claim 4, characterized in that: A cylindrical template (7) is provided between the frustum-shaped template (3) and the umbrella rib guide (4). One end of the cylindrical template (7) is connected to the frustum-shaped template (3), and the other end of the cylindrical template (7) is connected to the umbrella rib guide (4).

6. The method for constructing a gravity energy storage underground space according to claim 5, characterized in that: The top diameter of the frustum-shaped template (3) is the same as the diameter of the air film template (2). The cylindrical template (7) is cylindrical. The bottom diameter of the frustum-shaped template (3) and the diameter of the cylindrical template (7) are the same as the diameter of the umbrella rib inlet (4).

7. The method for constructing a gravity energy storage underground space according to claim 6, characterized in that: The frustum-shaped template (3), the air-supported membrane template (2), and the cylindrical template (7) are all wound up at the wellhead of the underground well-shaped space by a winding machine. The winding machine can sequentially lower the cylindrical template (7), the frustum-shaped template (3), and the air-supported membrane template (2) into the underground well-shaped space.

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