Cup opening structure construction method

Abstract

The invention relates to the technical field of cup foundation construction, and provides a cup structure construction method which comprises the following steps: measuring and positioning a cup; a template bottom positioning sheet for positioning a template is arranged at the cup rim measuring and positioning part; the assembled inner formwork is hoisted to a formwork bottom positioning piece, and the bottom of the inner formwork is fixed; outer formworks are erected on the periphery of the inner formwork at intervals; the inner formwork and the outer formwork are relatively fixed; concrete is poured between the inner formwork and the outer formwork to form a cup opening structure; and the inner formwork and the outer formwork are dismantled, and construction of the cup opening structure is completed. According to the scheme, the size and quality of the cup opening can be guaranteed through relative positioning and fixing of the inner mold plate and the outer mold plate. Moreover, the whole construction process of the method is convenient and fast, the construction efficiency can be effectively improved, damage to cup rims and formworks is reduced, and the construction quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of cup mouth foundation construction, and in particular to a cup mouth structure construction method. Background Art

[0002] There are two main ways of connecting steel columns and foundations in large steel structure factories. One is to embed anchor bolts on the concrete foundation structure, set a fixed steel plate at the bottom of the steel column, and fix it to the foundation structure through bolts to achieve load transfer. The other is to set a hollow "cup mouth" structure in the concrete foundation structure, place the steel column in the cup mouth, and then fill the hollow cup mouth with concrete to fix the steel column and concrete together to achieve load transfer.

[0003] However, there are several main problems in the process of supporting the internal mold of the cup mouth:

[0004] Since the hollow part of the cup mouth is generally small in size and the internal formwork space is small, it is inconvenient for personnel to enter and operate the formwork installation and removal;

[0005] The outside of the cup mouth is completely wrapped with concrete. Due to the influence of the concrete's own weight, after pouring, it will exert great pressure on the template inside the cup mouth, making it difficult to remove the template, and the template is often damaged during the removal process;

[0006] Due to the self-weight of concrete and vibration during the concrete pouring process, wooden formworks often deform, resulting in deviation in the formed dimensions and poor quality after the concrete pouring is completed. Summary of the invention

[0007] The purpose of the present invention is to solve at least one technical problem in the background technology and provide a cup mouth structure construction method.

[0008] To achieve the above object, the present invention provides a cup mouth structure construction method, comprising:

[0009] Cup mouth measurement and positioning;

[0010] A template bottom positioning piece for positioning the template is provided at the cup mouth measurement positioning position;

[0011] Lift the assembled inner formwork to the positioning piece at the bottom of the formwork to fix the bottom of the inner formwork;

[0012] Support the outer formwork at intervals outside the inner formwork;

[0013] Fix the inner and outer templates relatively;

[0014] Pour concrete between the inner formwork and the outer formwork to form a cup-shaped structure;

[0015] Remove the inner and outer formwork to complete the cup mouth structure construction.

[0016] According to one aspect of the present invention, the cup mouth measurement positioning is:

[0017] According to the design drawings, use GPS or total station to place at least 3 corner points on the constructed pedestal to measure and locate the cup mouth, where the elevation of the bottom surface of the cup mouth is consistent with the elevation of the top of the pedestal.

[0018] According to one aspect of the present invention, the cup mouth measurement and positioning is: according to the design drawings, in the cup mouth where the longitudinal main reinforcement of the cup mouth has been tied, first tie the stirrups below the bottom elevation of the cup mouth, and then use the longitudinal main reinforcement of the cup mouth to set the stirrups that support the bottom formwork of the precast concrete slab. The stirrups are tied with all the crossing steel bars, the stirrup elevation is adjusted, the top elevation of the bottom formwork of the precast slab is determined, and the top elevation of the bottom formwork of the precast slab is used as the bottom surface elevation of the cup mouth.

[0019] According to one aspect of the present invention, the template bottom positioning piece is an L-shaped positioning piece.

[0020] According to one aspect of the present invention, the assembly of the inner template includes:

[0021] Connect the two inner corner L-shaped adapter plates with the aluminum templates located at both ends of the two inner corner L-shaped adapter plates using pins to form two L-shaped templates;

[0022] Assemble the inner walls of the two opposite ends of the two L-shaped templates by fixing the clamping plates to form two initial inner templates with opposite inner template notches at the outer corners;

[0023] Angle aluminum is used to fix the outer side of the inner template gap to close the inner template gap, so as to form the inner template.

[0024] According to one aspect of the present invention, the fixed card plate comprises: a fixed card plate body, a first fixing member and a second fixing member;

[0025] One end of the first fixing member and the second fixing member are respectively detachably connected to the fixing card body;

[0026] The other ends of the first fixing member and the second fixing member are detachably connected to the inner walls at two opposite ends of the two L-shaped templates.

[0027] According to one aspect of the present invention, the assembly of the inner template further comprises:

[0028] A temporary reinforcement piece is provided at the notch of the inner template to keep the two L-shaped templates in a horizontal alignment during the hoisting process;

[0029] The temporary reinforcement member comprises: a middle connecting rod and L-shaped rods arranged at both ends of the middle connecting rod;

[0030] One end of the L-shaped rod connected to the middle connecting rod is provided with a thread, and the threads on the two L-shaped rods are arranged oppositely;

[0031] One end of the two L-shaped rods away from the middle connecting rod forms a pin structure connected to the top of the L-shaped template, and a pin hole fixedly connected to the L-shaped template is provided in the middle of the pin structure;

[0032] The two ends of the middle connecting rod are provided with threaded holes, and the threads of the threaded holes at the two ends of the middle connecting rod are arranged oppositely.

[0033] According to one aspect of the present invention, the outer formwork is supported and reinforced using an aluminum formwork, and inclined supports are provided on the outer side of each side of the outer formwork for support.

[0034] According to one aspect of the present invention, the inner template and the outer template are relatively fixed as follows:

[0035] The temporary fixing piece is used to connect the top of the inner formwork and the top of the outer formwork to relatively fix the inner formwork and the outer formwork.

[0036] According to one aspect of the present invention, pouring concrete between the inner formwork and the outer formwork to form the cup-shaped structure is as follows:

[0037] When pouring concrete between the inner formwork and the outer formwork, pour the middle of the span first, and then pour the four corners between the inner formwork and the outer formwork. The height difference of concrete around the formed cup-shaped structure is less than or equal to 500mm.

[0038] According to one aspect of the present invention, the inner and outer templates are removed in the following order:

[0039] Remove the temporary reinforcements connected and fixed to the outer formwork and the inner formwork;

[0040] Remove the outer formwork;

[0041] Remove the temporary fixings at the notch of the inner formwork;

[0042] Remove the fixed cardboard on the inner template;

[0043] Use a crowbar to pry one L-shaped template loose and then lift it out;

[0044] Use a crowbar to pry the other L-shaped template loose and lift it out;

[0045] Use a crowbar to pry the aluminum angle loose and take it out.

[0046] According to one scheme of the present invention, the construction method of the cup-mouth structure includes: measuring and positioning the cup-mouth; setting a template bottom positioning piece for positioning the template at the cup-mouth measurement and positioning position; hoisting the assembled inner template to the template bottom positioning piece to fix the bottom of the inner template; supporting the outer template at intervals outside the inner template; fixing the inner template and the outer template relatively; pouring concrete between the inner template and the outer template to form the cup-mouth structure; removing the inner template and the outer template to complete the construction of the cup-mouth structure. With such an arrangement, the size and quality of the cup-mouth can be guaranteed by the relative positioning and fixing of the inner template and the outer template. Moreover, the above-mentioned entire construction process is convenient and fast, which can effectively improve the construction efficiency, reduce the damage to the cup-mouth and the template, and ensure the construction quality.

[0047] According to one solution of the present invention, the assembly of the inner template includes: connecting two inner corner L-shaped adapter plates and aluminum templates located at both ends of the two inner corner L-shaped adapter plates by pins to form two L-shaped templates; assembling the inner walls at the two opposite ends of the two L-shaped templates by fixing the card plate to form two initial inner templates with opposite inner template gaps at the outer corners; and using angle aluminum to fix the inner template gaps on the outside to close the inner template gaps to form the inner template. With such an arrangement, the two L-shaped templates can be stably and securely connected from the inner walls of the two L-shaped templates by fixing the card plate, so that the formed inner template has a higher structural strength and a certain stability during the structure hoisting process. The two inner template gaps that are opposite to each other are used to facilitate the demoulding at a later stage. The inner template gaps generated are closed from the outer walls of the two L-shaped templates by angle aluminum, so that the structure is more stable and has higher strength.

[0048] According to one solution of the present invention, the fixed card includes: a fixed card body, a first fixing member and a second fixing member; one end of the first fixing member and the second fixing member are respectively detachably connected to the fixed card body; the other ends of the first fixing member and the second fixing member are respectively detachably connected to the inner walls of the two opposite ends of the two L-shaped templates. In this way, the two L-shaped templates can be stably and securely connected from the inner walls of the two L-shaped templates through the fixed card, so that the formed inner template has a higher structural strength, so that the structure has a certain stability during the hoisting process.

[0049] According to one scheme of the present invention, the assembly of the inner formwork also includes: setting a temporary reinforcement piece at the notch of the inner formwork so that the two L-shaped formworks remain in a horizontal alignment state during the lifting process; the temporary reinforcement piece includes: a middle connecting rod and L-shaped rod members arranged at both ends of the middle connecting rod; the end of the L-shaped rod member connected to the middle connecting rod is provided with a thread, and the threads on the two L-shaped rod members are arranged oppositely; the ends of the two L-shaped rod members away from the middle connecting rod form a pin structure connected to the top of the L-shaped formwork, and a pin hole fixedly connected to the L-shaped formwork is provided in the middle of the pin structure; threaded holes are provided at both ends of the middle connecting rod, and the threads of the threaded holes at both ends of the middle connecting rod are arranged oppositely. Such an arrangement can ensure that the two L-shaped templates remain relatively stable through temporary reinforcements to avoid up and down misalignment during lifting. A temporary reinforcement that is easy to disassemble and assemble is designed to fix the corners of the two inner template gaps, and L-shaped rods are set at both ends of the temporary reinforcement. One end of the L-shaped rod is set in a pin shape (a pin hole is set in the middle for fixed connection with the template), and the other end is set with a thread to be connected to the middle connecting rod; a thread is set inside the middle connecting rod, and the thread threads at both ends of the middle connecting rod are in opposite directions. In this way, when the middle connecting rod is twisted in one direction, the L-shaped rods at both ends can be tightened or released at the same time, so that they can be freely adjusted and fixed according to the spacing of the pin holes of the L-shaped templates on both sides of the inner template gap, making the construction operation more convenient and quick, and being able to quickly strengthen the stable structure and improve the overall strength and operability of the structure.

[0050] According to one solution of the present invention, the inner template and the outer template are relatively fixed by connecting the top of the inner template and the outer template with a temporary fixing piece, and fixing the inner template and the outer template relatively. In this way, the bottom of the inner template can be fixed with a bottom positioning piece, the middle of the inner template is fixed with a cement support rod for cross-sectional dimensions, and then the top of the inner template is connected to the outer template with a temporary fixing piece. In this way, the inner template and the outer template can be relatively fixed by using the triangle stability principle to ensure the cup size and quality.

[0051] According to the scheme of the present invention, the present invention uses aluminum templates as inner templates to improve molding quality, increase turnover times, and reduce construction costs. A fixed card plate structure is set between the aluminum templates to fix the aluminum templates so that the outer dimensions of the aluminum templates meet the size requirements of the design drawings. At the same time, the length of the aluminum templates is reduced at the two diagonal positions to form a certain size cavity (i.e., the inner template notch) at the two diagonal positions. Angle aluminum is set at the two diagonal cavity positions to ensure that concrete does not enter the corner cavity part. After the concrete is poured, the fixed card plate is knocked off. Since there are certain cavities on both sides of the aluminum template, there is no extrusion effect, which is convenient for demolding. The present invention sets temporary fixings to reinforce the notch position of the inner template corners to ensure the overall stability of the inner template. An L-shaped positioning piece is used to reliably position the bottom of the inner template of the cup mouth. A temporary fixing is set to connect the inner and outer templates, and the triangle stability principle is used to relatively fix the inner template and the outer template to ensure the size and quality of the cup mouth. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 A flowchart schematically showing a method for constructing a cup mouth structure according to an embodiment of the present invention;

[0053] Figure 2 A schematic diagram of the cup mouth structure showing that the elevation of the bottom surface of the cup mouth is consistent with the elevation of the top of the foundation pedestal;

[0054] Figure 3 A schematic diagram showing the cup mouth structure with the bottom elevation inside the cup mouth higher than the top elevation of the foundation pedestal;

[0055] Figure 4 A schematic diagram showing a cup mouth measurement and positioning structure diagram according to an embodiment of the present invention, wherein the elevation of the inner bottom surface of the cup mouth is higher than the elevation of the top of the foundation pedestal;

[0056] Figure 5 A schematic diagram showing the structure of a template bottom positioning sheet according to an embodiment of the present invention;

[0057] Figure 6 A schematic diagram showing a structure of an L-shaped template according to an embodiment of the present invention;

[0058] Figure 7 A schematic diagram showing the structure of an initial inner template according to an embodiment of the present invention;

[0059] Figure 8 Schematically showing an inner template structure diagram according to an embodiment of the present invention;

[0060] Fig. 9 A schematic diagram of a fixed card board structure according to an embodiment of the present invention is shown;

[0061] Fig.10A schematic diagram showing a structure of fixing a temporary reinforcement member on an inner formwork according to an embodiment of the present invention;

[0062] Fig.11 A schematic diagram of a temporary reinforcement structure according to an embodiment of the present invention is shown;

[0063] Fig.12 The figure schematically shows the structural relationship between the inner template and the outer template according to one embodiment of the present invention. DETAILED DESCRIPTION

[0064] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0065] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0066] Figure 1 The flowchart schematically shows a method for constructing a cup mouth structure according to an embodiment of the present invention. Figure 1 As shown, in this embodiment, the cup mouth structure construction method includes:

[0067] Cup mouth measurement and positioning;

[0068] A template bottom positioning piece for positioning the template is provided at the cup mouth measurement positioning position;

[0069] Lift the assembled inner formwork to the positioning piece at the bottom of the formwork to fix the bottom of the inner formwork;

[0070] Support the outer formwork at intervals outside the inner formwork;

[0071] Fix the inner and outer templates relatively;

[0072] Pour concrete between the inner formwork and the outer formwork to form a cup-shaped structure;

[0073] The inner and outer templates are removed to complete the construction of the cup mouth structure. In this way, the size and quality of the cup mouth can be guaranteed through the relative positioning and fixation of the inner and outer templates. Moreover, the entire construction process is convenient and fast, which can effectively improve the construction efficiency, reduce the damage to the cup mouth and template, and ensure the construction quality.

[0074] In this embodiment, after the positioning piece at the bottom of the template is installed, the cup-mouth reinforcement needs to be tied and fixed securely according to the drawings.

[0075] In this embodiment, it is worth noting that according to the relative position of the bottom elevation of the cup mouth and the top elevation of the foundation pedestal, there are mainly two types of cup mouth structures. One type is that the bottom elevation of the cup mouth is consistent with the top elevation of the foundation pedestal, such as Figure 2 As shown in the figure, this type of cup mouth is to install the template directly on the foundation cap after the foundation cap is poured; the other type is that the bottom elevation of the cup mouth is higher than the top elevation of the foundation cap, such as Figure 3 As shown, in order to solve the problem that the bottom formwork of the cup mouth is inconvenient to remove, a prefabricated 50mm thick concrete slab bottom formwork with the same concrete strength grade of the cup mouth is set at the bottom, and the cup mouth inner formwork is supported on the prefabricated concrete slab. After the concrete pouring is completed, the bottom formwork of the cup mouth does not need to be removed, which greatly improves the construction convenience and the molding quality.

[0076] Further, according to one embodiment of the present invention, the cup mouth measurement positioning is:

[0077] According to the design drawings, use GPS or total station to place at least 3 corner points on the constructed foundation to measure and locate the cup mouth, such as Figure 2 As shown, this positioning is applicable when the elevation of the bottom surface of the cup mouth is consistent with the elevation of the top of the pedestal.

[0078] Further, according to one embodiment of the present invention, Figure 3 and Figure 4 As shown, the measurement and positioning of the cup mouth that is applicable to the cup mouth whose inner bottom elevation is higher than the foundation pedestal top elevation is as follows: according to the design drawings, in the cup mouth where the longitudinal main reinforcement of the cup mouth has been tied, first tie the stirrups 17 below the inner bottom elevation of the cup mouth, and then use the longitudinal main reinforcement 18 of the cup mouth to set the stirrups 19 that support the bottom formwork of the precast concrete slab, tie the stirrups 19 with all the crossed steel bars, adjust the stirrup elevation, determine the top elevation of the precast slab bottom formwork 20, and use the top elevation of the precast slab bottom formwork 20 as the inner bottom elevation of the cup mouth.

[0079] Further, according to one embodiment of the present invention, the template bottom positioning piece is an L-shaped positioning piece, such as Figure 5 shown.

[0080] Further, according to one embodiment of the present invention, the assembly of the inner template includes:

[0081] like Figure 6 As shown, two inner corner L-shaped adapter plates 1 are connected to aluminum templates 2 located at both ends of the two inner corner L-shaped adapter plates 1 by using pins to form two L-shaped templates 3;

[0082] like Figure 7 As shown, the inner walls at the opposite ends of the two L-shaped templates 3 are assembled by fixing the clamping plate 4 to form an initial inner template with two opposite inner template notches 5 at the outer corners;

[0083] like Figure 8 As shown, angle aluminum 6 is used to fix the outer side of the inner template gap to close the inner template gap 5 to form an inner template 7. With this arrangement, the two L-shaped templates 3 can be stably and securely connected from the inner walls of the two L-shaped templates 3 by fixing the clamping plate 4, so that the formed inner template 7 has a higher structural strength, and the structure has a certain stability during the lifting process. The two inner template gaps 5 that are opposite to each other are convenient for later demolding. The inner template gaps 5 generated are closed from the outer walls of the two L-shaped templates 3 by angle aluminum 6, making the structure more stable and stronger. In this embodiment, in order to avoid the misalignment of the angle aluminum 6 during the concrete pouring process, a double-sided sponge strip can be used to fix the angle aluminum 6 on the aluminum template 2, and then the inner template 7 is formed.

[0084] Furthermore, if Fig. 9 As shown, according to one embodiment of the present invention, the fixed card plate 4 includes: a fixed card plate body 8, a first fixing member 9 and a second fixing member 10;

[0085] One end of the first fixing member 9 and the second fixing member 10 are respectively detachably connected to the fixing card body 8;

[0086] The other ends of the first fixing member 9 and the second fixing member 10 are detachably connected to the inner walls of the two opposite ends of the two L-shaped templates 3. In this way, the two L-shaped templates 3 can be stably and securely connected from the inner walls of the two L-shaped templates 3 through the fixing clamp 4, so that the formed inner template 7 has a higher structural strength and has a certain stability during the structure hoisting process.

[0087] Further, according to one embodiment of the present invention, the assembly of the inner template further comprises:

[0088] like Fig.10 As shown, a temporary reinforcement member 11 is provided at the inner template notch 5 to keep the two L-shaped templates 3 in a horizontal alignment state during the hoisting process;

[0089] like Fig.11 As shown, in this embodiment, the temporary reinforcement member 11 includes: a middle connecting rod 12 and L-shaped rods 13 arranged at both ends of the middle connecting rod;

[0090] One end of the L-shaped rod 13 connected to the middle connecting rod 12 is provided with a thread, and the threads on the two L-shaped rods 13 are arranged oppositely;

[0091] The ends of the two L-shaped rods 13 away from the middle connecting rod 12 form a pin structure 14 connected to the top of the L-shaped template 3, and the middle of the pin structure 14 is provided with a pin hole 15 fixedly connected to the L-shaped template 3;

[0092] The two ends of the middle connecting rod 12 are provided with threaded holes, and the threads of the threaded holes at the two ends of the middle connecting rod 12 are arranged oppositely. In this way, the temporary reinforcement member 11 can ensure that the two L-shaped templates 3 remain relatively stable and avoid up and down misalignment during the hoisting process. A temporary reinforcement member 11 that is easy to disassemble and assemble is designed to fix the corners of the two inner template gaps, and L-shaped rods are arranged at both ends of the temporary reinforcement member 11. One end of the L-shaped rod is arranged in a pin shape (a pin hole is arranged in the middle for fixed connection with the template), and the other end is arranged with a thread to connect with the middle connecting rod 12; the middle connecting rod 12 is arranged with a thread inside, and the threaded threads at the two ends of the middle connecting rod 12 are arranged in opposite directions. In this way, when the middle connecting rod 12 is twisted in one direction, the L-shaped rods 13 at both ends can be tightened or released at the same time, so that they can be freely adjusted and fixed according to the spacing of the pin holes of the L-shaped templates 3 on both sides of the inner template gap, making the construction operation more convenient and quick, and being able to quickly strengthen the stable structure and improve the overall strength and operability of the structure.

[0093] Further, according to an embodiment of the present invention, the inner template 7 is placed at the cup mouth measurement and positioning position by a crane / tower crane / manually. To facilitate hoisting, a hook is provided to hook the two inner corner L-shaped adapter plates for hoisting.

[0094] Further, according to one embodiment of the present invention, the outer formwork 16 is supported and reinforced with an aluminum formwork, and inclined supports are arranged on the outer sides of each side of the outer formwork for support. Such an arrangement can ensure that the concrete is not unstable during pouring, and at the same time provide a fixed foundation for the inner formwork 7.

[0095] Further, according to one embodiment of the present invention, the inner template and the outer template are relatively fixed as follows:

[0096] like Fig.12 As shown, a temporary fixing piece 11 is used to connect the top of the inner template 7 and the outer template 16 to relatively fix the inner template 7 and the outer template 16. In this way, the bottom of the inner template 7 can be fixed by a bottom positioning piece, the middle of the inner template 7 is fixed by a cement support rod for cross-sectional dimensions, and then the top of the inner template 7 is connected to the outer template 16 by the temporary fixing piece 11. In this way, the inner template and the outer template can be relatively fixed by using the triangle stability principle to ensure the cup size and quality.

[0097] Further, according to one embodiment of the present invention, pouring concrete between the inner formwork and the outer formwork to form a cup-shaped structure is as follows:

[0098] When pouring concrete between the inner formwork 7 and the outer formwork 16, pour the middle of the span first, then pour the four corners between the inner and outer formworks, so that the height difference of the concrete around the cup-shaped structure is less than or equal to 500mm. In addition, during the vibration process, the vibrating rod should be prevented from directly contacting the angle aluminum 6 to prevent the angle aluminum 6 from being separated from the aluminum formwork 2 after strong vibration, resulting in leakage.

[0099] Further, according to an embodiment of the present invention, the formwork can be removed when the final setting strength of the concrete reaches 2.5 MPa or more. In this embodiment, the inner formwork and the outer formwork are removed in the following order:

[0100] Remove the temporary reinforcement member 11 connected and fixed to the outer formwork 16 and the inner formwork 7;

[0101] Remove the outer formwork 16;

[0102] Remove the temporary fixing piece 11 at the notch 5 of the inner template;

[0103] Remove the fixed card plate 4 on the inner template 7;

[0104] Use a crowbar to pry one L-shaped template 3 loose and then lift it out;

[0105] Use a crowbar to pry the other L-shaped template 3 loose and then lift it out;

[0106] Use a crowbar to pry the aluminum angle 6 loose and take it out to complete the demoulding.

[0107] According to the above scheme of the present invention, the present invention uses aluminum templates as inner templates to improve molding quality, increase turnover times, and reduce construction costs. A fixed card plate structure is set between the aluminum templates to fix the aluminum templates so that the outer dimensions of the aluminum templates meet the size requirements of the design drawings. At the same time, the length of the aluminum templates is reduced at the two diagonal positions to form a certain size cavity (i.e., the inner template notch) at the two diagonal positions. Angle aluminum is set at the two diagonal cavity positions to ensure that concrete does not enter the corner cavity part. After the concrete is poured, the fixed card plate is knocked off. Since there are certain cavities on both sides of the aluminum template, there is no extrusion effect, which is convenient for demolding. The present invention sets temporary fixings to reinforce the notch position of the inner template corners to ensure the overall stability of the inner template. An L-shaped positioning piece is used to reliably position the bottom of the inner template of the cup mouth. A temporary fixing is set to connect the inner and outer templates, and the triangle stability principle is used to relatively fix the inner template and the outer template to ensure the size and quality of the cup mouth.

[0108] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A cup mouth structure construction method, characterized in that: include: Cup mouth measurement and positioning; A template bottom positioning piece for positioning the template is provided at the cup mouth measurement positioning position; Lift the assembled inner formwork to the positioning piece at the bottom of the formwork to fix the bottom of the inner formwork; Support the outer formwork at intervals outside the inner formwork; Fix the inner formwork and the outer formwork relatively; Pour concrete between the inner formwork and the outer formwork to form a cup-shaped structure; Remove the inner and outer formwork to complete the cup mouth structure construction.

2. The cup mouth structure construction method according to claim 1, characterized in that: The cup mouth measurement positioning is: According to the design drawings, use GPS or total station to place at least 3 corner points on the constructed pedestal to measure and locate the cup mouth, where the elevation of the bottom surface of the cup mouth is consistent with the elevation of the top of the pedestal.

3. The cup mouth structure construction method according to claim 1, characterized in that: The cup mouth measurement and positioning is as follows: according to the design drawings, in the cup mouth where the longitudinal main reinforcement of the cup mouth has been tied, first tie the stirrups below the cup mouth bottom elevation, then use the longitudinal main reinforcement of the cup mouth to set the stirrups that support the bottom formwork of the precast concrete slab, tie the stirrups with all the crossed steel bars, adjust the stirrup elevation, determine the top elevation of the precast slab bottom formwork, and use the top elevation of the precast slab bottom formwork as the bottom surface elevation inside the cup mouth.

4. The cup mouth structure construction method according to claim 1, characterized in that: The template bottom positioning piece is an L-shaped positioning piece.

5. The cup mouth structure construction method according to claim 1, characterized in that: The assembly of the inner template includes: Connect the two inner corner L-shaped adapter plates with the aluminum templates located at both ends of the two inner corner L-shaped adapter plates using pins to form two L-shaped templates; Assemble the inner walls of the two opposite ends of the two L-shaped templates by fixing the clamping plates to form two initial inner templates with opposite inner template notches at the outer corners; Angle aluminum is used to fix the outer side of the inner template gap to close the inner template gap, so as to form the inner template.

6. The cup mouth structure construction method according to claim 5, characterized in that: The fixed card plate comprises: a fixed card plate body, a first fixing member and a second fixing member; One end of the first fixing member and the second fixing member are respectively detachably connected to the fixing card body; The other ends of the first fixing member and the second fixing member are detachably connected to the inner walls at two opposite ends of the two L-shaped templates.

7. The cup mouth structure construction method according to claim 5, characterized in that: The assembly of the inner template also includes: A temporary reinforcement piece is provided at the notch of the inner template to keep the two L-shaped templates in a horizontal alignment during the hoisting process; The temporary reinforcement member comprises: a middle connecting rod and L-shaped rods arranged at both ends of the middle connecting rod; One end of the L-shaped rod connected to the middle connecting rod is provided with a thread, and the threads on the two L-shaped rods are arranged oppositely; One end of the two L-shaped rods away from the middle connecting rod forms a pin structure connected to the top of the L-shaped template, and a pin hole fixedly connected to the L-shaped template is provided in the middle of the pin structure; The two ends of the middle connecting rod are provided with threaded holes, and the threads of the threaded holes at the two ends of the middle connecting rod are arranged oppositely.

8. The cup mouth structure construction method according to claim 1, characterized in that: The outer formwork is supported and reinforced using an aluminum formwork, and inclined supports are arranged on the outer side of each side of the outer formwork for support.

9. The cup mouth structure construction method according to claim 7, characterized in that: The inner template and the outer template are relatively fixed as follows: The temporary fixing piece is used to connect the top of the inner formwork and the top of the outer formwork to relatively fix the inner formwork and the outer formwork.

10. The cup mouth structure construction method according to claim 1, characterized in that: The method of pouring concrete between the inner formwork and the outer formwork to form a cup-shaped structure is as follows: When pouring concrete between the inner formwork and the outer formwork, pour the middle of the span first, and then pour the four corners between the inner formwork and the outer formwork. The height difference of concrete around the formed cup-shaped structure is less than or equal to 500mm.

11. The cup mouth structure construction method according to claim 9, characterized in that: The inner and outer templates are removed in the following order: Remove the temporary reinforcements connected and fixed to the outer formwork and the inner formwork; Remove the outer formwork; Remove the temporary fixings at the notch of the inner formwork; Remove the fixed cardboard on the inner template; Use a crowbar to pry one L-shaped template loose and then lift it out; Use a crowbar to pry the other L-shaped template loose and lift it out; Use a crowbar to pry the aluminum angle loose and take it out.

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