A construction method for reserved holes for equipment foundation anchor bolts and its application structure

Abstract

The invention discloses a construction method for pre-installed holes for anchor bolts of equipment foundation and an application structure thereof, and relates to the technical field of petrochemical engineering construction. The construction method comprises a preparation process of a threaded rod and a threaded rod fixing frame and a construction process of applying the threaded rod, wherein the construction process of applying the threaded rod comprises arranging the threaded rod, fixing the threaded rod, adjusting the pre-embedded depth of the threaded rod, checking the threaded rod, wetting the surface of the threaded rod, pouring concrete for the equipment foundation, taking out the threaded rod, and cleaning the pre-installed holes for anchor bolts. By implementing the technical scheme, threaded rods are used to construct the pre-installed holes for anchor bolts of equipment foundation, so as to overcome the technical defects of the temporary wooden formwork support method used in the traditional construction method, which is inconvenient to install, highly destructive to dismantle, and poor in molding quality. The construction method using threaded rods is simple and fast, has a wide range of materials, is easy to obtain, is safe and reliable in construction applications, has good molding quality, and the threaded rods can be reused after one construction is completed, thereby saving costs.

Description

Technical Field

[0001] The invention relates to the technical field of petrochemical engineering construction, in particular to a construction method for reserved holes for anchor bolts of equipment foundation and an application structure thereof. Background Art

[0002] In the construction of petrochemical engineering projects, there are a large number of equipment foundations (civil engineering) that need to be constructed. Generally, it is necessary to reserve holes for equipment anchor bolts during the construction of concrete foundations. The traditional construction method is to use wooden templates to make anchor bolt reserved hole molds on site, embed them before pouring concrete, and break them out after the concrete solidifies.

[0003] However, in the process of implementing the embodiments of the present invention, the inventors of the present application found that the traditional construction method has at least the following technical problems: ① There are a large number of reserved holes for the equipment anchor bolts, and each reserved hole requires a separate wooden reserved hole mold to be made, which requires a large amount of auxiliary work; ② Destructive dismantling is required to remove the bolt reserved hole mold, which requires a large amount of dismantling work, and the mold cannot be reused; ③ Due to the unevenness of the temporary customized molds on site, the size and depth of the anchor bolt holes after construction are not standard, the quality is inconsistent, and the molding quality is poor. Summary of the invention

[0004] In view of the above technical problems, the purpose of the present invention is to provide a construction method for reserved holes for equipment foundation anchor bolts, and its purpose is to use threaded rods to construct reserved holes for equipment foundation anchor bolts, so as to overcome the technical defects of the traditional construction method of using temporary wooden formwork support method, which has the advantages of inconvenient installation, large destructiveness in dismantling and poor molding quality. The construction method using threaded rods is simple and fast, with a wide range of materials and easy availability. It is safe and reliable in construction applications, has good molding quality, and has better effects after secondary grouting. In addition, the threaded rods can be reused after one construction is completed, saving costs.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A construction method for reserved holes for anchor bolts of equipment foundation, the construction method comprising the following steps:

[0007] Step 1, preparation process of threaded rod and threaded rod fixing frame: including selecting threaded rod parameters, selecting dimension parameters of the threaded rod according to the type of holes reserved for prefabricated bolts, including hole diameter and depth; selecting a threaded rod fixing frame matching the threaded rod according to the dimension parameters of the threaded rod;

[0008] Step 2: Construction process of using threaded rods:

[0009] Step S1, arranging threaded rods: arranging threaded rods according to the positions and numbers of reserved holes for equipment foundation anchor bolts in the civil equipment foundation drawing, with one threaded rod corresponding to one reserved hole for the anchor bolt;

[0010] Step S2, fixing the threaded rods: according to the reserved hole positions of the anchor bolts, the threaded rods are fixed by using a threaded rod fixing frame, so that the threaded rods are fixed in rows or individually;

[0011] Step S3, adjusting the embedding depth of the threaded rod: adjusting the embedding depth of the threaded rod according to the depth of the hole reserved for the anchor bolt;

[0012] Step S4, check the threaded rods: after the threaded rods are arranged, a comprehensive inspection should be carried out: including checking whether the threaded rod positions, the number of threaded rods, the verticality of the threaded rods, and the embedded depth meet the requirements;

[0013] Step S5, wetting the surface of the threaded rod: before pouring concrete, wetting the outer surface of all the threaded rods with water to facilitate the removal of the threaded rods;

[0014] Step S6, pouring concrete for the equipment foundation;

[0015] Step S7, taking out the threaded rod: when the poured concrete is in the initial setting, the threaded rod is taken out by rotating the threaded rod; after the concrete slowly solidifies, the reserved hole for the anchor bolt is solidified and formed;

[0016] Step S8, cleaning the reserved holes for anchor bolts: after the threaded rods are taken out, check and clean the concrete spilled in the reserved holes for anchor bolts, and then seal the holes for the next step.

[0017] As a preferred solution, in the step one, the selected threaded rod has a right-handed trapezoidal thread, and the threaded rod fixing frame has an internal threaded hole compatible with the right-handed trapezoidal thread, so that the threaded rod can be screwed in by rotating clockwise along the internal threaded hole of the threaded rod fixing frame, and the threaded rod can be taken out by rotating counterclockwise along the internal threaded hole of the threaded rod fixing frame, which is convenient for the installation and removal of the threaded rod, and the threaded rod is connected to the threaded rod fixing frame using the right-handed trapezoidal thread, which has better connection stability and reliability during the construction process, so that the reserved hole forming effect of the equipment foundation anchor bolt is good.

[0018] As a preferred solution, the threaded rod parameter requirements are selected as follows:

[0019] The outer diameter of the thread is d1, and d1 = (D + 38) mm, where D is the diameter of the hole reserved for the prefabricated bolt;

[0020] The thread pitch diameter is d2, and d2 = (D + 8) mm;

[0021] The inner diameter of the thread is d3, and d3 = D (mm);

[0022] The thread height is h1, and h1 = 15 mm;

[0023] The thread lead angle is φ, and φ=8.15°;

[0024] The pitch is P, and P = 40 mm;

[0025] The length of the threaded rod is H, and H=(h+220) mm; where h is the depth of the hole reserved for the prefabricated bolt.

[0026] As a preferred embodiment, the threaded rod construction process in step 2 is applied to the formwork support link in the equipment foundation construction, which includes steps S1 to S8, and also includes step S9, cleaning the threaded rod: cleaning the threaded rod after taking it out so that it can be reused in the next construction. In this way, the threaded rod can be repeatedly used for the construction of reserved holes for equipment foundation anchor bolts, shortening the construction period, saving construction costs, and effectively ensuring the molding quality of the reserved holes for equipment foundation anchor bolts.

[0027] As a preferred solution, in step S2, the threaded rod is fixed by first supporting the threaded rod fixing frame on temporary steel bars or wooden strips, tying both ends of the threaded rod fixing frame with wire, and then screwing the threaded rod into the internal threaded hole reserved on the threaded rod fixing frame.

[0028] As a preferred solution, in step S3, the embedding depth of the threaded rod is adjusted so that the embedding depth is deepened by rotating the threaded rod clockwise according to the scale value set on the threaded rod, and is shallowed by rotating the threaded rod counterclockwise.

[0029] On the other hand, the present invention also provides an application structure of a reserved hole for an equipment foundation anchor bolt, which is applied to the construction method of the reserved hole for an equipment foundation anchor bolt, and includes a threaded rod and a threaded rod fixing frame; wherein

[0030] The outer diameter of the threaded rod is not less than the diameter of the bolt reserved hole, and the length of the threaded rod is greater than the depth of the bolt reserved hole;

[0031] The threaded rod fixing frame includes a fixing portion and extension portions arranged at both ends of the fixing portion and symmetrically arranged about the fixing portion. The thickness of the fixing portion is greater than that of the extension portion, and an internal threaded hole adapted to the threaded rod is arranged along the thickness direction of the fixing portion.

[0032] As a preferred solution, the threaded rod is hollow and has an exhaust hole connected to the atmosphere at the bottom of the threaded rod. In this way, when taking out the threaded rod, the exhaust hole can be effectively used to balance the pressure inside the reserved hole of the anchor bolt and the outside atmospheric pressure, avoiding the problem of negative pressure causing difficulty in taking out the threaded rod. The structural design is ingenious and reasonable.

[0033] As a preferred solution, a screw-out socket is provided at the upper end of the threaded rod, so that a steel bar or other structural member can be inserted into the screw-out socket and the threaded rod can be taken out through the screw-out socket, so as to facilitate the removal of the threaded rod.

[0034] As a preferred solution, the material of the threaded rod is selected from one of plastic, carbon steel or stainless steel, wherein the threaded rod made of plastic has low cost, but carbon steel or stainless steel is more durable in construction, and the selection is made according to the specific construction process.

[0035] As described above, the present invention has at least the following beneficial effects compared with the prior art:

[0036] 1. The construction method of the equipment foundation anchor bolt reserved holes of the present invention can effectively overcome the technical defects of the traditional construction method using temporary wooden formwork support method, which has the disadvantages of inconvenient installation, great destructiveness in dismantling and poor molding quality. The process operation is simple and fast, which can effectively improve the construction progress. The threaded rods are used to construct the equipment foundation anchor bolt reserved holes. When the threaded rods are taken out, destructive dismantling can be effectively avoided, and the bolt reserved holes have good molding quality.

[0037] 2. The threaded rod of the present invention is equipped with a threaded rod fixing frame, which has a simple structure, a wide range of materials, and is easily available. The threaded rod and the threaded rod fixing frame are connected by threaded matching, and the installation position is accurate and its verticality can be effectively guaranteed. It has better connection stability and reliability during the construction process, thereby further improving the molding quality of the reserved holes for the anchor bolts of the equipment foundation.

[0038] 3. In the construction process of the threaded rod used in the present invention, the surface of the threaded rod is wetted before being taken out. This lubricates the outer surface of the threaded rod and the concrete in the initial setting stage, making it easy to take out the threaded rod by rotating it, so as to further ensure the molding quality of the reserved holes for the anchor bolts of the equipment foundation.

[0039] 4. The application structure of the reserved holes for the equipment foundation anchor bolts of the present invention can be reused after the construction is completed, with high utilization rate, which can significantly save construction costs. After review, the shapes and sizes of all the reserved holes meet the design requirements. The reserved holes for the equipment foundation anchor bolts manufactured by the construction method of the present invention have high hole quality and are clean inside the holes.

[0040] To sum up, the present invention uses threaded rods to replace wooden molds for construction, which can overcome the shortcomings of traditional construction methods, save a lot of construction materials and labor costs on the construction site, reduce repetitive labor, and improve work efficiency. Deep-type rotating trapezoidal equipment foundation anchor bolt reserved holes can be manufactured as needed, and the threaded rods used in the construction have the advantages of simple structure, wide material selection, and easy availability; more importantly, the application structure will not cause destructive demolition during construction applications, and has the advantages of safety and reliability, simple and quick operation method, good molding quality, and better effect after secondary grouting; after the construction is completed, the threaded rods can be reused, the engineering market demand is large, the scalability is strong, and good economic value can be created to significantly save the construction cost of the enterprise, thereby having a good application prospect and promotion and use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be described by way of specific embodiments with reference to the accompanying drawings, in which

[0042] Figure 1 It is a schematic diagram of the application structure installation of the reserved holes for the foundation bolts of the exemplary equipment of the present invention;

[0043] Figure 2 Schematic diagram of the application structure of the reserved holes for the foundation bolts of the exemplary equipment of the present invention;

[0044] Figure 3 An exemplary embodiment of the present invention Figure 2 Schematic diagram of the threaded rod;

[0045] Figure 4 An exemplary embodiment of the present invention Figure 2 Schematic diagram of the threaded rod holder.

[0046] Explanation of the reference numerals: 1-threaded rod; 11-exhaust hole; 12-screw-out socket; 2-threaded rod fixing frame; 21-fixing part; 22-extension part; 23-internal threaded hole; 3-temporary reinforcement; 4-formwork; 5-foundation surface; 6-concrete. DETAILED DESCRIPTION

[0047] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0048] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0049] The embodiment is basically as follows Figure 1As shown: This embodiment provides a construction method for pre-reserved holes for anchor bolts of equipment foundation, which is applied to the template support link in equipment foundation construction; the construction method includes the following steps:

[0050] Step 1, preparation process of threaded rod and threaded rod fixing frame: including threaded rod parameter selection, selecting the size parameters of the threaded rod 1 according to the type of prefabricated bolt reserved hole, including the hole diameter and depth; selecting the threaded rod fixing frame 2 matching the threaded rod 1 according to the size parameters of the threaded rod 1; as the preferred embodiment of this embodiment, the threaded rod 1 selected in this embodiment has a right-handed trapezoidal thread, and the threaded rod fixing frame 2 has an internal threaded hole 23 adapted to the right-handed trapezoidal thread, so that the threaded rod 1 is screwed in by rotating clockwise along the internal threaded hole 23 of the threaded rod fixing frame 2, and the threaded rod 1 is taken out by rotating counterclockwise along the internal threaded hole 23 of the threaded rod fixing frame 2, which is convenient for installation and removal of the threaded rod 1, and the threaded rod 1 adopts a right-handed trapezoidal thread to cooperate with the threaded rod fixing frame 2 to be connected, which has better connection stability and reliability during the construction process, so that the equipment foundation anchor bolt reserved hole forming effect is good;

[0051] Furthermore, the selected parameter requirements of the threaded rod 1 are as follows:

[0052] The outer diameter of the thread is d1, and d1 = (D + 38) mm, where D is the diameter of the hole reserved for the prefabricated bolt;

[0053] The thread pitch diameter is d2, and d2 = (D + 8) mm;

[0054] The inner diameter of the thread is d3, and d3 = D (mm);

[0055] The thread height is h1, and h1 = 15 mm;

[0056] The thread lead angle is φ, and φ=8.15°;

[0057] The pitch is P, and P = 40 mm;

[0058] The length of the threaded rod 1 is H, and H = (h + 220) mm; where h is the depth of the hole reserved for the prefabricated bolt;

[0059] As described above, the size parameters of the threaded rod 1 should be selected according to the size and depth of the reserved bolt hole, wherein the inner diameter of the threaded rod 1 is not less than the diameter of the bolt reserved hole, and the length of the threaded rod 1 is greater than the hole depth of the bolt reserved hole; the prepared equipment foundation anchor bolt reserved hole is a deep rotating trapezoidal reserved hole with a good hole forming effect;

[0060] The dimension parameters of the threaded rod 1 provided in this embodiment are selected as follows: according to the reserved hole diameter of the prefabricated equipment foundation anchor bolt of 100mm and the hole depth of 400mm, the length of the threaded rod 1 is selected to be 620mm, the threaded rod fixing frame 2 is matched with the threaded rod 1, including the threaded rod fixing frame 2 having an internal threaded hole 23 adapted to the right-handed trapezoidal thread on the threaded rod 1; the structure and parameters of the threaded rod 1 selected in this embodiment refer to Figure 2 As shown:

[0061] Thread outer diameter: d1 = 138mm;

[0062] Thread median diameter: d2 = 108 mm;

[0063] Thread inner diameter: d3 = 100mm;

[0064] Thread height: h1 = 15 mm;

[0065] Thread lead angle: φ = 8.15°;

[0066] Pitch: P = 40mm;

[0067] In combination with the above-mentioned threaded rod 1 and threaded rod fixing frame 2, step 2 is provided, and the construction process of using the threaded rod 1 is as follows:

[0068] Step S1, arranging threaded rods 1: during the equipment foundation construction process, in the template 4 support link, located on the template foundation surface 5, the threaded rods 1 are arranged according to the positions and numbers of the reserved holes for the equipment foundation anchor bolts in the civil equipment foundation diagram, and one threaded rod 1 corresponds to one reserved hole for the anchor bolts;

[0069] Step S2, fixing the threaded rod 1: according to the reserved hole position of the anchor bolt, the threaded rod fixing frame 2 is used to fix the threaded rod 1, specifically, the threaded rod fixing frame 2 is first supported on the temporary steel bar 3, the two ends of the threaded rod fixing frame 2 are tied with wire, and then the threaded rod 1 is screwed into the internal threaded hole 23 reserved on the threaded rod fixing frame 2, so that the threaded rod 1 is fixed in a row;

[0070] Step S3, adjusting the embedding depth of the threaded rod 1: adjusting the embedding depth of the threaded rod 1 according to the depth of the reserved hole for the anchor bolt, so that the embedding depth of the threaded rod 1 is deepened by rotating the threaded rod 1 clockwise according to the scale value set on the threaded rod 1, and the embedding depth is shallowed by rotating the threaded rod 1 counterclockwise. The embedding depth of the threaded rod 1 can refer to the scale value on the threaded rod 1;

[0071] Step S4, check the threaded rods 1: after the threaded rods 1 are arranged, a comprehensive inspection should be carried out: including checking whether the position of the threaded rods 1, the number of the threaded rods 1, the verticality of the threaded rods 1, the embedded depth of the threaded rods 1 meet the requirements, and whether the bundling is firm;

[0072] Step S5, wetting the surface of the threaded rod 1: before pouring the concrete 6, wetting the outer surfaces of all the threaded rods 1 with water, which has a lubricating effect on the outer surfaces of the threaded rods 1 and the concrete 6 in the initial setting stage, so as to facilitate the removal of the threaded rods 1;

[0073] Step S6, pouring concrete 6 for the equipment foundation;

[0074] Step S7, taking out the threaded rod 1: when the poured concrete 6 is in the initial setting, the threaded rod 1 is taken out by rotating it counterclockwise; in summer, the threaded rod 1 is generally taken out after pouring for about 1 hour, and in winter, the threaded rod 1 is generally taken out after pouring for 2 hours. After the concrete 6 slowly solidifies, the reserved hole for the anchor bolt is solidified and formed;

[0075] Step S8, cleaning the reserved holes for anchor bolts: after the threaded rod 1 is taken out, the concrete 6 spilled in the reserved holes for anchor bolts is checked and cleaned, and then the holes are sealed to wait for the next step.

[0076] The construction process of step 2 of this embodiment is applied to the support link of the template 4 in the equipment foundation construction, which includes the steps S1 to S8. As a preferred embodiment of this embodiment, it also includes step S9, cleaning the threaded rod 1: the threaded rod 1 is cleaned after being taken out, so as to be reused in the next construction, with high utilization rate. In this way, the threaded rod 1 can be repeatedly used for the construction of reserved holes for equipment foundation anchor bolts, shortening the construction period and significantly saving construction costs. After review, the shape and size of all the reserved holes meet the design requirements. The reserved holes for equipment foundation anchor bolts manufactured by the construction method of the present invention have high hole quality and are clean inside the holes.

[0077] on the other hand, Figure 2 The schematic diagram of the application structure of the equipment foundation anchor bolt reserved hole of the exemplary embodiment of the present invention is shown. According to the present invention, this embodiment also provides an application structure of the equipment foundation anchor bolt reserved hole, which is applied to the construction method of the equipment foundation anchor bolt reserved hole, including a threaded rod 1 and a threaded rod fixing frame 2; combined with Figure 3 and Figure 4As shown, the outer diameter of the threaded rod 1 provided in this embodiment is not less than the diameter of the bolt reserved hole, and the length of the threaded rod 1 is greater than the hole depth of the bolt reserved hole; the threaded rod fixing frame 2 includes a fixing portion 21 and an extension portion 22 arranged at both ends of the fixing portion 21 and symmetrically arranged about the fixing portion 21, the thickness of the fixing portion 21 is greater than the thickness of the extension portion 22, and an internal threaded hole 23 adapted to the threaded rod 1 is provided along the thickness direction of the fixing portion 21; therefore, this embodiment uses the threaded rod 1 to replace the wooden mold for construction, in order to solve the technical defects of the traditional construction method using a temporary wooden formwork support method, which has the problems of inconvenient installation, high destructiveness in dismantling and poor molding quality, the threaded rod 1 is used to construct the equipment foundation anchor bolt reserved hole, which can effectively improve the construction progress, effectively avoid destructive dismantling when taking out the threaded rod 1, and the bolt reserved hole has good molding quality.

[0078] As a preference of this embodiment, the threaded rod 1 provided in this embodiment has a right-handed trapezoidal thread, and the threaded rod fixing frame 2 has an internal threaded hole 23 adapted to the right-handed trapezoidal thread, so that the threaded rod 1 is screwed in by rotating clockwise along the internal threaded hole 23 of the threaded rod fixing frame 2, and the threaded rod 1 is taken out by rotating counterclockwise along the internal threaded hole 23 of the threaded rod fixing frame 2, which is convenient for the installation and removal of the threaded rod 1, and the threaded rod 1 is connected with the threaded rod fixing frame 2 by adopting the right-handed trapezoidal thread, which has better connection stability and reliability during the construction process, so that the forming effect of the reserved hole for the anchor bolt of the equipment foundation is good.

[0079] like Figure 2 As shown, the threaded rod 1 provided in this embodiment is hollow, and an exhaust hole 11 connected to the top of the threaded rod 1 is provided at the bottom of the threaded rod 1, and the exhaust hole 11 is used to communicate with the external atmosphere. This embodiment takes the exhaust hole with a hole diameter of 6 mm as an example, so that in the process of taking out the threaded rod 1, the exhaust hole 11 can be effectively used to balance the pressure in the reserved hole of the anchor bolt and the external atmospheric pressure, avoiding the problem of negative pressure causing difficulty in taking out the threaded rod 1, and the structural design is ingenious and reasonable; at the same time, a screw-out socket 12 is provided at the upper end where the threaded rod 1 is installed, so that a steel bar or other structural member can be inserted into the screw-out socket 12, and the threaded rod 1 can be taken out through the screw-out socket 12, so as to facilitate the removal of the threaded rod 1.

[0080] Among them, the material of the threaded rod 1 can be selected from one of plastic, carbon steel or stainless steel, among which the threaded rod 1 made of plastic material has low cost, but as a preferred embodiment of this embodiment, the threaded rod 1 provided in this embodiment is made of carbon steel, which is selected according to the specific construction process. Carbon steel is more durable during construction; scale values ​​(not shown) are set along the length direction of the threaded rod 1, so that the embedded depth of the threaded rod 1 can be adjusted according to the scale value, which is convenient for accurately controlling the embedded depth of the threaded rod 1.

[0081] In this embodiment, the thread height of the threaded rod 1 is selected to be h1, and h1=15mm, so that a deep-type spiral trapezoidal equipment foundation anchor bolt reserved hole can be manufactured; the thread lead angle of the threaded rod 1 is selected to be φ, and φ=8.15°, so that the equipment foundation anchor bolt reserved hole that meets the design requirements can be obtained simply and conveniently.

[0082] like Figure 4 As shown, the fixing portion 21 and the extending portion 22 of the threaded rod fixing frame 2 provided in this embodiment are integrally connected and an arc-shaped transition portion is formed at the connection, so that the threaded rod fixing frame 2 is stably connected and installed, easy to manufacture, and can stably carry the threaded rod 1; at the same time, the extending portions 22 at both ends of the fixing portion 21 are provided with mounting holes for support, so that the threaded rod fixing frame 2 is first supported on the temporary steel bars 3 or wooden strips through the mounting holes, the two ends of the threaded rod fixing frame 2 are tied with wire, and then the threaded rod 1 is screwed into the internal threaded hole 23 reserved on the threaded rod fixing frame 2.

[0083] The following is a comparison between the application structure of this embodiment and the traditional construction scheme:

[0084] (1) Material cost analysis: Calculated based on market material prices: For this embodiment, the number of reserved anchor bolt holes is about 500. If the traditional construction scheme is adopted, the material cost of a single reserved anchor bolt hole wooden mold is about 15 yuan, which cannot be reused. The total material cost of 500 anchor bolt holes is 500x15=7500 yuan; while the technical scheme of this embodiment is adopted, the use of 50 threaded rods can meet the construction progress requirements, and they can be reused. The cost of a single threaded rod is about 250 yuan, and the service life is calculated based on 500 times. The single-time cost of a single rod is 0.5 yuan, and the total material cost of 500 anchor bolt holes is 500x0.5=250 yuan. Therefore, the demand for reserved anchor bolt holes for engineering equipment foundations is large, which can significantly save material costs and is environmentally friendly.

[0085] (2) Labor cost analysis:

[0086] a. Comparison of production time: If the traditional construction scheme is adopted, it is necessary to use a template to nail the anchor bolt hole mold on site, and it takes about 40 minutes to make a single mold, and it takes about 330 man-hours to complete 500 reserved anchor bolt hole molds; while the technical scheme of this embodiment can avoid the time of wooden mold processing and production, and the production time cost is zero, so the production time of a single anchor bolt reserved hole can be saved by about 40 minutes, and a project can be saved by about 330 man-hours, and the construction progress will be improved accordingly; if the labor cost is converted, a carpenter is calculated at 300 yuan per day, and the construction of a single single anchor bolt reserved hole can save about 25 yuan in labor costs;

[0087] b. Comparison of installation and disassembly time: The traditional construction method is to use nails or binding to install and fix, while the technical solution of this embodiment uses brackets to fix; the traditional removal is destructive to the mold, while the technical solution of this embodiment adopts a rotary removal, which is more convenient and quicker than the traditional construction method. According to actual operation statistics, the use of the technical solution of this embodiment saves more than 30% of installation and disassembly time compared with the traditional method.

[0088] (3) Work efficiency evaluation: The technical solution of this embodiment is easy to install and disassemble, and eliminates the wooden mold processing and manufacturing process, which improves the work efficiency compared with the traditional construction method.

[0089] (4) Economic Benefit Analysis: Based on the comparative analysis of materials, labor, and work efficiency, the economic benefit of adopting the technical solution of this embodiment is increased by about 80 times. At the same time, the technical solution of this embodiment is conducive to shortening the construction time and improving the construction progress.

[0090] In summary, the application structure of the equipment foundation anchor bolt reserved hole of the present invention includes a threaded rod 1 and a threaded rod fixing frame 2 matched with the threaded rod 1, which has a simple structure, a wide range of materials, and is easy to obtain. The threaded rod 1 and the threaded rod fixing frame 2 are connected by threaded matching, the installation position is accurate, and its verticality can be effectively guaranteed, and it has better connection stability and reliability during the construction process, so as to further improve the molding quality of the equipment foundation anchor bolt reserved hole; the present invention uses the threaded rod 1 to replace the wooden mold for construction, and can manufacture deep-type rotating trapezoidal equipment foundation anchor bolt reserved holes as needed. The application structure will not cause destructive demolition during construction applications, and has the advantages of safety and reliability, simple and fast operation method, good molding quality, and better effect after secondary grouting; after review, the shape and size of all the reserved holes meet the design requirements, the manufactured equipment foundation anchor bolt reserved holes have high hole quality, and the hole is clean. After the construction is completed, the threaded rod 1 can be reused to significantly save the construction cost of the enterprise, thereby having a good application prospect and promotion and use value.

[0091] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A construction method for reserved holes for equipment foundation anchor bolts, characterized in that: An application structure of a reserved hole for an equipment foundation anchor bolt is used, the application structure comprising a threaded rod and a threaded rod fixing frame; wherein the outer diameter of the threaded rod is not less than the diameter of the reserved hole for the bolt, and the length of the threaded rod is greater than the hole depth of the reserved hole for the bolt; The threaded rod fixing frame comprises a fixing portion and an extension portion arranged at both ends of the fixing portion and symmetrically arranged with respect to the fixing portion, the thickness of the fixing portion is greater than the thickness of the extension portion, and an internal threaded hole adapted to the threaded rod is arranged along the thickness direction of the fixing portion; the threaded rod is hollow, and an exhaust hole connected to the atmosphere is provided at the bottom of the threaded rod; a screw-out plug hole is provided at the upper end of the threaded rod, so that the threaded rod can be taken out through the screw-out plug hole; the material of the threaded rod is selected from one of plastic, carbon steel or stainless steel; The construction method comprises the following steps: Step 1, a preparation process of a threaded rod and a threaded rod fixing frame: comprising selecting threaded rod parameters, selecting the size parameters of the threaded rod according to the type of the hole reserved for the prefabricated bolt, including the hole diameter and depth; selecting a threaded rod fixing frame matching the threaded rod according to the size parameters of the threaded rod; Step 2: Construction process of using threaded rods: Step S1, arranging threaded rods: arranging threaded rods according to the positions and numbers of reserved holes for equipment foundation anchor bolts in the civil equipment foundation drawing, with one threaded rod corresponding to one reserved hole for the anchor bolt; Step S2, fixing the threaded rods: according to the reserved hole positions of the anchor bolts, the threaded rods are fixed by using a threaded rod fixing frame, so that the threaded rods are fixed in rows or individually; Step S3, adjusting the embedding depth of the threaded rod: adjusting the embedding depth of the threaded rod according to the depth of the hole reserved for the anchor bolt; Step S4, check the threaded rods: after the threaded rods are arranged, a comprehensive inspection should be carried out: including checking whether the threaded rod positions, the number of threaded rods, the verticality of the threaded rods, and the embedded depth meet the requirements; Step S5, wetting the surface of the threaded rod: before pouring concrete, wetting the outer surface of all the threaded rods with water to facilitate the removal of the threaded rods; Step S6, pouring concrete for the equipment foundation; Step S7, taking out the threaded rod: when the poured concrete is in the initial setting, the threaded rod is taken out by rotating the threaded rod; after the concrete slowly solidifies, the reserved hole for the anchor bolt is solidified and formed; Step S8, cleaning the reserved holes for anchor bolts: after the threaded rods are taken out, check and clean the concrete spilled in the reserved holes for anchor bolts, and then seal the holes for the next step; In the step 1, the selected threaded rod has a right-handed trapezoidal thread, and the threaded rod fixing frame has an internal threaded hole adapted to the right-handed trapezoidal thread, so that the threaded rod can be screwed in by rotating clockwise along the internal threaded hole of the threaded rod fixing frame, and can be taken out by rotating counterclockwise along the internal threaded hole of the threaded rod fixing frame; The selected threaded rod parameter requirements are as follows: the outer diameter of the thread is d1, and d1 = (D + 38) mm, where D is the diameter of the hole reserved for the prefabricated bolt; The thread pitch diameter is d2, and d2 = (D + 8) mm; The inner diameter of the thread is d3, and d3 = D (mm); The thread height is h1, and h1 = 15 mm; The thread lead angle is φ, and φ=8.15°; The pitch is P, and P = 40 mm; The length of the threaded rod is H, and H=(h+220) mm; where h is the depth of the hole reserved for the prefabricated bolt.

2. The construction method of the equipment foundation anchor bolt reserved holes according to claim 1 is characterized by: The threaded rod construction process in step 2 is applied to the formwork support link in the equipment foundation construction, which includes steps S1 to S8, and also includes step S9, cleaning the threaded rod: cleaning the threaded rod after removal so as to prepare for reuse in the next construction.

3. The construction method of the equipment foundation anchor bolt reserved holes according to claim 2 is characterized by: In the step S2, the threaded rod is fixed by first supporting the threaded rod fixing frame on temporary steel bars or wooden strips, tying the two ends of the threaded rod fixing frame with wire, and then screwing the threaded rod into the internal threaded hole reserved on the threaded rod fixing frame.

4. The construction method of the equipment foundation anchor bolt reserved holes according to claim 3 is characterized by: In step S3, the pre-embedding depth of the threaded rod is adjusted so that the pre-embedding depth is deepened by rotating the threaded rod clockwise according to the scale value set on the threaded rod, and the pre-embedding depth is shallowed by rotating the threaded rod counterclockwise.

Images