Variable-diameter formwork for freezing method vertical shaft construction

Abstract

The utility model discloses a variable-diameter template for freezing method vertical shaft construction, which relates to the technical field of vertical shaft construction and comprises a plurality of first arc-shaped modules, the first arc-shaped modules are arranged on two sides of a second arc-shaped module, and the second arc-shaped module and the first arc-shaped modules are encircled to form a cylindrical barrel. The hydraulic driving assembly is arranged between the multiple first arc-shaped modules, the variable-diameter adjusting mechanism is arranged between the multiple first arc-shaped modules and between the first arc-shaped modules and the second arc-shaped modules, and the sealing structures are arranged between the multiple first arc-shaped modules and between the first arc-shaped modules, the second arc-shaped modules and the variable-diameter adjusting mechanism; according to the variable-diameter formwork for freezing method vertical shaft construction, sealing of the splicing position of the formwork after diameter changing can be achieved, so that the slurry leakage phenomenon at the splicing position during grouting is avoided, pollution to the construction environment is avoided, and the construction quality of a vertical shaft is ensured.

Description

Technical Field

[0001] This utility model relates to the field of shaft construction technology, specifically a variable diameter template for shaft construction using the freezing method. Background Technology

[0002] In vertical shaft construction using the freezing method, formwork is a crucial piece of equipment for constructing the well wall. In actual construction, due to variations in geological conditions and increased construction depth, the well wall diameter often needs adjustment to accommodate different formation pressures and stability requirements. However, traditional formwork typically has a fixed diameter, necessitating multiple sets of formwork during construction, leading to low construction efficiency and increased costs.

[0003] To address this issue, several variable-diameter formwork designs have been developed. However, existing variable-diameter formwork systems are prone to grout leakage at the joints between modules, as they are composed of multiple arc-shaped modules. This not only affects the construction quality of the shaft but may also lead to environmental pollution. Utility Model Content

[0004] The purpose of this utility model is to provide a variable diameter template for vertical shaft construction using the freezing method. This variable diameter template can achieve sealing at the joint of the template after the diameter is changed, thereby avoiding grout leakage at the joint during grouting, avoiding pollution of the construction environment, and ensuring the construction quality of the vertical shaft.

[0005] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a variable diameter template for vertical shaft construction using the freezing method, comprising multiple first arc-shaped modules;

[0006] The second arc-shaped module has the first arc-shaped module on both sides, and the second arc-shaped module and multiple first arc-shaped modules together form a cylindrical body;

[0007] A hydraulic drive assembly is disposed between a plurality of the first arc-shaped modules;

[0008] A variable diameter adjustment mechanism is provided between multiple first arc-shaped modules and between the first arc-shaped module and the second arc-shaped module;

[0009] A sealing structure is provided between multiple first arc-shaped modules and between the first arc-shaped module, the second arc-shaped module and the variable diameter adjustment mechanism.

[0010] In some embodiments, the variable diameter adjustment mechanism includes a plurality of spliced ​​arc blocks, which are disposed between a plurality of first arc modules or between the first arc module and the second arc module;

[0011] A guide groove is provided on one side of the first arc-shaped module, the second arc-shaped module, and the splicing arc-shaped block;

[0012] A guide strip is provided on the other side of the first arc-shaped module, the second arc-shaped module, and the splicing arc-shaped block, and the guide strip is inserted into the guide groove.

[0013] In some embodiments, the sides of the guide strip are trapezoidal.

[0014] In some embodiments, the height of the guide groove is less than the height of the splicing arc block.

[0015] In some embodiments, the sealing structure includes a sealant layer disposed on the sides of the first arc-shaped module, the second arc-shaped module, and the splicing arc-shaped block.

[0016] In some embodiments, the sealing structure further includes an opening groove, which is disposed on the two sides of the first arc-shaped module, the second arc-shaped module, and the splicing arc-shaped block away from the center.

[0017] A sealing groove is formed by two adjacent opening grooves;

[0018] A sealing strip, which is embedded in the sealing groove.

[0019] In some embodiments, the sealing structure further includes a limiting strip disposed on the sidewall of the opening groove;

[0020] The limiting groove is provided on both sides of the sealing strip, and the limiting strip is provided in the limiting groove.

[0021] In some embodiments, the limiting strip and the limiting groove are interference-fitted.

[0022] In summary, this utility model has the following beneficial effects:

[0023] The variable-diameter template used in this type of freezing method for vertical shaft construction employs a sealing structure combining a sealing layer and sealing strips. This structure can achieve sealing at the joints of the template after the diameter is changed, thereby preventing grout leakage at the joints during grouting, avoiding pollution of the construction environment, and ensuring the construction quality of the vertical shaft. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3This is a schematic diagram of the structure connecting the first arc-shaped module and the splicing arc-shaped block of this utility model;

[0027] Figure 4 This is a cross-sectional view of the connection between the first arc-shaped module and the splicing arc-shaped block of this utility model;

[0028] Figure 5 This utility model Figure 4 Enlarged view of point B in the middle;

[0029] Figure 6 This is a schematic diagram of the structure of the hydraulic drive assembly of this utility model on the first arc-shaped module.

[0030] In the diagram: 1. First arc-shaped module; 2. Second arc-shaped module; 3. Hydraulic drive assembly; 4. Variable diameter adjustment mechanism; 41. Splicing arc-shaped block; 42. Guide groove; 43. Guide strip; 5. Sealing structure; 51. Opening groove; 52. Sealing groove; 53. Sealing strip; 54. Limiting strip; 55. Limiting groove. Detailed Implementation

[0031] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] refer to Figure 1-6 A variable-diameter template for vertical shaft construction using the freezing method includes multiple first arc-shaped modules 1, second arc-shaped modules 2, a hydraulic drive assembly 3, a variable-diameter adjustment mechanism 4, and a sealing structure 5. The second arc-shaped modules 2 have first arc-shaped modules 1 on both sides, and the second arc-shaped modules 2 and the multiple first arc-shaped modules 1 together form a cylindrical body. Both the first arc-shaped modules 1 and the second arc-shaped modules 2 are made of high-strength steel, possessing good strength and rigidity. Reinforcing ribs can be provided on the inner and outer sides of both the first arc-shaped modules 1 and the second arc-shaped modules 2 to improve the load-bearing capacity and stability of the modules. There can be 12 first arc-shaped modules 1 and 1 second arc-shaped module 2. The 12 first arc-shaped modules 1 and 1 second arc-shaped module 2 can form a complete cylindrical body, and 13 splicing positions can be reserved in the formed cylindrical body to facilitate subsequent diameter changes of the template. Simultaneously, the differences in template size can be evenly decomposed into multiple segments, thereby improving the smoothness of the template surface.

[0033] The hydraulic drive assembly 3 is located between multiple first arc-shaped modules 1 and may include multiple double-acting hydraulic cylinders, a hydraulic pump, and hydraulic lines. The hydraulic pump is connected to the double-acting hydraulic cylinders through the hydraulic lines to provide high-pressure hydraulic fluid. The two ends of the double-acting hydraulic cylinders are respectively connected to two first arc-shaped modules 1, thereby providing power to drive the first arc-shaped modules 1 and the second arc-shaped modules 2 to move in the radial direction. This is prior art and will not be described in detail here. The diameter adjustment mechanism 4 is located between multiple first arc-shaped modules 1 and between the first arc-shaped modules 1 and the second arc-shaped modules 2. With the cooperation of the hydraulic drive assembly 3, it can realize the adjustment of the template diameter. The sealing structure 5 is located between multiple first arc-shaped modules 1 and between the first arc-shaped modules 1, the second arc-shaped modules 2, and the diameter adjustment mechanism 4. It can improve the sealing performance at the template splicing point, thereby preventing problems such as slurry leakage during template use and ensuring well wall quality.

[0034] In some embodiments, the diameter adjustment mechanism 4 includes multiple splicing arc blocks 41, guide grooves 42, and guide strips 43. The splicing arc blocks 41 are disposed between multiple first arc modules 1 or between the first arc module 1 and the second arc module 2, and can compensate for the curvature of the gaps between multiple first arc modules 1 or between the first arc module 1 and the second arc module 2 during the template diameter adjustment process, thereby ensuring the integrity of the template outer wall. Guide grooves 42 are located on one side of the first arc-shaped module 1, the second arc-shaped module 2, and the splicing arc-shaped block 41, while guide strips 43 are located on the other side. Guide strips 43 and guide grooves 42 can be interlocked, increasing the contact area at the splicing points during template diameter adjustment, thereby improving the stability of the template connection. Simultaneously, guide strips 43 can slide within guide grooves 42, restricting the movement direction of the splicing arc-shaped block 41 and facilitating accurate insertion of the splicing arc-shaped block 41 into the gaps between multiple first arc-shaped modules 1 or between the first arc-shaped module 1 and the second arc-shaped module 2, ensuring a smooth and reliable template diameter adjustment process. The dimensions and shapes of guide grooves 42 and guide strips 43 can be designed and adjusted according to their location. For example, guide strips 43 on the first arc-shaped module 1 can simultaneously interlock with guide grooves 42 on other first arc-shaped modules 1, second arc-shaped modules 2, and splicing arc-shaped blocks 41.

[0035] In some embodiments, the side of the guide strip 43 and the opening of the guide groove 42 can both be trapezoidal. The structure of being larger at the top and smaller at the bottom facilitates the insertion of the guide strip 43 into the guide groove 42, thereby allowing it to slide within the guide groove 42. It also enables the guide strip 43 to have a self-locking function when moving within the guide groove 42, further improving the stability of the template.

[0036] In some embodiments, the height of the guide groove 42 may be less than the height of the splicing arc block 41. The bottom surface of the splicing arc block 41 can be supported by the inner bottom wall of the guide groove 42, thereby realizing the positioning and insertion of the splicing arc block 41 at the splicing gap.

[0037] In some embodiments, the sealing structure 5 includes a sealant layer, which can be applied to the sides of the first arc-shaped module 1, the second arc-shaped module 2, and the splicing arc-shaped block 41. The sealant layer can be made of weather-resistant polysulfide sealant. By squeezing the sealant layer, it can be deformed to fill the tiny gaps between the modules, thereby forming a preliminary seal at the splicing of the templates and preventing grout leakage.

[0038] In some embodiments, the sealing structure 5 further includes an opening groove 51, a sealing groove 52, and a sealing strip 53. The opening groove 51 is located on both sides of the first arc-shaped module 1, the second arc-shaped module 2, and the splicing arc-shaped block 41 away from the center. Two adjacent opening grooves 51 form a sealing groove 52. The sealing strip 53 is embedded in the sealing groove 52, which can form a seal at the splicing point of the template outer wall, thereby achieving the sealing at the template splicing point. It can also form a double sealing structure with the sealing adhesive layer, further improving the sealing performance at the template splicing point.

[0039] In some embodiments, the sealing structure 5 further includes a limiting strip 54 and a limiting groove 55. The limiting strip 54 is disposed on the side wall of the opening groove 51, and the limiting groove 55 is disposed on both sides of the sealing strip 53. The limiting strip 54 is provided in the limiting groove 55. By squeezing the limiting strip 54 to deform it, the limiting strip 54 is inserted into the limiting groove 55, thereby realizing the installation of the sealing strip 53 in the sealing groove 52, preventing it from falling off during use, and achieving sealing at the template splice.

[0040] In some embodiments, the limiting strip 54 and the limiting groove 55 can be interference-fitted, which can cause the sealing strip 53 to deform under force and fill the sealing groove 52, thereby improving the sealing effect of the sealing structure 5.

[0041] The specific working principle is as follows:

[0042] In the initial state, multiple first arc-shaped modules 1 are arranged around the second arc-shaped module 2 to form a cylindrical body with an initial diameter, which is suitable for the construction of well walls with initial dimensions.

[0043] After the initial wellbore dimensions are constructed, the hydraulic pump is started, pushing the first arc-shaped module 1 to move radially, creating gaps between multiple first arc-shaped modules 1 and between the first arc-shaped module 1 and the second arc-shaped module 2. As needed, the splicing arc-shaped block 41 is inserted into the gaps between the first arc-shaped modules 1 or between the first arc-shaped module 1 and the second arc-shaped module 2 to compensate for the curvature differences caused by diameter variations. The guide groove 42 and guide strip 43 cooperate to ensure that the splicing arc-shaped block 41 can be inserted accurately and smoothly, and to increase the stability of the splice joint.

[0044] A sealant layer is applied to the sides of all modules, forming an initial sealing barrier. Secondly, the combination of the opening groove 51 and the sealant strip 53 creates an effective sealing line on the outer wall of the template, enhancing the sealing effect at the template joints and effectively preventing grout leakage.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A variable-diameter formwork for vertical shaft construction using the freezing method, characterized in that: Includes multiple first arc-shaped modules (1); The second arc module (2) is provided with the first arc module (1) on both sides, and the second arc module (2) and the multiple first arc modules (1) together form a cylindrical body; A hydraulic drive assembly (3) is disposed between a plurality of the first arc-shaped modules (1); A variable diameter adjustment mechanism (4) is provided between multiple first arc-shaped modules (1) and between the first arc-shaped module (1) and the second arc-shaped module (2); A sealing structure (5) is provided between multiple first arc-shaped modules (1) and between the first arc-shaped module (1), the second arc-shaped module (2) and the variable diameter adjustment mechanism (4).

2. The variable diameter formwork for vertical shaft construction using the freezing method according to claim 1, characterized in that: The variable diameter adjustment mechanism (4) includes multiple splicing arc blocks (41), which are disposed between multiple first arc modules (1) or between the first arc module (1) and the second arc module (2); Guide groove (42), the guide groove (42) is provided on one side of the first arc module (1), the second arc module (2) and the splicing arc block (41); The guide strip (43) is located on the other side of the first arc module (1), the second arc module (2) and the splicing arc block (41), and the guide strip (43) is inserted into the guide groove (42).

3. A variable-diameter formwork for vertical shaft construction using the freezing method according to claim 2, characterized in that: The side of the guide bar (43) is trapezoidal.

4. A variable-diameter formwork for vertical shaft construction using the freezing method according to claim 2, characterized in that: The height of the guide groove (42) is less than the height of the splicing arc block (41).

5. A variable-diameter formwork for vertical shaft construction using the freezing method according to claim 2, characterized in that: The sealing structure (5) includes a sealing layer, which is disposed on the sides of the first arc-shaped module (1), the second arc-shaped module (2) and the splicing arc-shaped block (41).

6. A variable-diameter formwork for vertical shaft construction using the freezing method according to claim 5, characterized in that: The sealing structure (5) further includes an opening groove (51), which is located on the two sides away from the center of the first arc module (1), the second arc module (2) and the splicing arc block (41). The sealing groove (52) is formed by two adjacent opening grooves (51); A sealing strip (53) is embedded in the sealing groove (52).

7. A variable-diameter formwork for vertical shaft construction using the freezing method according to claim 6, characterized in that: The sealing structure (5) also includes a limiting strip (54), which is disposed on the side wall of the opening groove (51); The limiting groove (55) is provided on both sides of the sealing strip (53), and the limiting strip (54) is provided in the limiting groove (55).

8. A variable-diameter formwork for vertical shaft construction using the freezing method according to claim 7, characterized in that: The limiting strip (54) and the limiting groove (55) are interference fit.

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