CN108677997B - Foundation bolt installation method of large-scale equipment - Google Patents
Foundation bolt installation method of large-scale equipment Download PDFInfo
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- CN108677997B CN108677997B CN201810519691.4A CN201810519691A CN108677997B CN 108677997 B CN108677997 B CN 108677997B CN 201810519691 A CN201810519691 A CN 201810519691A CN 108677997 B CN108677997 B CN 108677997B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M9/00—Special layout of foundations with respect to machinery to be supported
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Abstract
The invention relates to a ground anchor pre-burying device of large equipment and a ground anchor mounting method of the large equipment, wherein a bottom layer and a middle layer of reinforcing steel bars are bound above a plain concrete cushion layer, an anchoring frame is welded above the middle layer of reinforcing steel bars, a positioning frame is welded above the anchoring frame, the positions of all ground bolts are drawn on the top surface of the positioning frame, a ground bolt projection circle and an outer sleeve projection circle are respectively drawn, positioning holes are cut along the ground bolt projection circle, the ground bolts penetrate out of the positioning holes, and the lower ends of the ground bolts are welded on the anchoring frame; sleeving the outer sleeve on each anchor bolt, and filling the inner cavity with flexible materials; after binding the reinforcing steel bars on the top layer, setting up a mould to pour concrete, placing a base sizing block beside each anchor bolt after solidification, hoisting equipment in place after removing the protective adhesive tape and the flexible material, aligning the anchor bolts of the equipment to fall on the base sizing block, and screwing nuts on each anchor bolt to compress. The invention can ensure that a plurality of anchor bolts have accurate positions and large anchoring force and can be successfully positioned at one time.
Description
Technical Field
The invention relates to a device for embedding a ground anchor of equipment, in particular to a device for embedding a ground anchor of large-scale equipment; the invention further relates to a ground anchor installation method of the large-scale equipment, and belongs to the technical field of ground anchor embedding.
Background
The equipment is usually fixed on the foundation through the rag bolt, and conventionally the rag bolt is installed in the following modes, and one is to drive in expansion bolts as foundation bolts after the foundation concrete reaches the strength, and the binding force between the bolts and the foundation is small, so that the equipment is only suitable for small-sized equipment.
The installation of large-scale equipment requires embedding foundation bolts in foundation concrete, wherein the embedding of the foundation bolts is divided into two methods, namely a secondary pouring method: when foundation concrete is poured, wood forms are placed at the positions of the foundation bolts to form foundation bolt embedded holes, after the foundation concrete reaches the strength, templates of the foundation bolt embedded holes are removed, then equipment is installed on a foundation and is initially corrected, foundation bolts are placed in the foundation bolt embedded holes, the upper ends of the foundation bolts are connected with the equipment, and secondary pouring is carried out in the foundation bolt embedded holes. The other is a direct pre-burying method: and (3) directly placing all foundation bolts in place, pouring with foundation concrete, and installing equipment on the foundation bolts after the foundation concrete reaches the strength.
For large heavy-duty equipment with a foundation area of more than 60 square meters and equipment weight of more than 50 tons, foundation bolts are usually more than 90, the foundation concrete volume is usually more than 200m, and the traditional foundation bolt embedding method has the following defects: the method comprises the following steps that if a direct pre-embedding method is adopted, the position accuracy of each bolt is difficult to grasp, as long as the position of one bolt is inaccurate, the equipment cannot fall, pouring of an integral foundation is failed, and the result is not considered. The upper surface area and the volume of the foundation concrete of the large-scale equipment are large, and in the solidification process after concrete pouring, the volume change is caused due to the effect of hydration heat, so that the embedding precision of the foundation bolts is affected. According to the method, due to the shape of the equipment, certain foundation bolts cannot be pre-buried by adopting a secondary grouting method. For large heavy-duty equipment, the depth of the embedded holes required by the secondary pouring method is very deep, and the template is difficult to remove and take out. The depth of the embedded hole of the foundation bolt is far greater than the caliber size of the embedded hole, so that the secondary concrete pouring is difficult to vibrate and compact until the hole bottom. The original foundation concrete is thoroughly dried, the binding force problem exists between the secondary poured wet concrete and the dry concrete, and looseness is easy to occur for equipment with larger vibration such as a compressor and the like.
Disclosure of Invention
The primary aim of the invention is to overcome the problems in the prior art, provide a foundation pre-burying device of large equipment, which can ensure that the coordinates of a plurality of foundation bolts are accurate, the anchoring force with foundation concrete is large, and the equipment can be successfully hoisted in place once.
In order to solve the technical problems, the invention relates to a foot embedding device of large equipment, which comprises an element concrete cushion layer, wherein a reinforced concrete layer is arranged above the element concrete cushion layer, a plurality of foot bolts are embedded in the upper part of the reinforced concrete layer, the reinforced concrete layer comprises a bottom layer reinforced bar, a middle layer reinforced bar and a top layer reinforced bar, an anchoring frame is arranged above the middle layer reinforced bar, and the bottom of the anchoring frame is supported on the element concrete cushion layer through a lower upright post; a positioning frame is arranged below the top layer steel bars, the vertical projection of the positioning frame is overlapped with that of the anchoring frame, and the bottom of the positioning frame is supported on the anchoring frame through an upper upright post; the lower ends of the anchor bolts are welded on the anchoring frames, and the upper ends of the anchor bolts penetrate out of corresponding positioning holes of the positioning frames.
Compared with the prior art, the invention has the following beneficial effects: the anchoring frame forms a steel frame platform parallel to the plain concrete cushion layer above the middle layer of steel bars, the positioning frame forms a positioning frame parallel to the anchoring frame below the top layer of steel bars, the lower ends of the anchor bolts are welded on the anchoring frame, so that the connection tension of the anchor bolts is ensured, the bearing of extremely large tension is ensured, the height of the tops of the anchor bolts exposed out of the top surface of the reinforced concrete layer is ensured to be consistent, and when large equipment is hoisted and falls, the anchor bolt holes on the equipment are synchronously sleeved into the corresponding anchor bolts; the upper parts of the anchor bolts are inserted into the corresponding positioning holes of the positioning frame, so that the coordinate accuracy of the anchor bolts can be ensured, and the anchor bolts can be kept in a vertical state, so that the equipment is difficult to sit due to the inclination of the upper ends.
As an improvement of the invention, the lower end of each anchor bolt is connected with a transverse folded edge, and the transverse folded edges of each anchor bolt are respectively welded on the anchoring frame. The transverse flanging can prolong the connection length of each foundation bolt and the anchoring frame and improve the capacity of bearing heavy load tensile force of the foundation bolts.
As a further improvement of the invention, the upper periphery of each foundation bolt is sleeved with an outer sleeve, the lower port of the outer sleeve is welded on the top surface of the positioning frame, the upper port of the outer sleeve is level with the top surface of the reinforced concrete layer, and the inner cavity of the outer sleeve is filled with flexible materials. The upper part of the foundation bolt can shake in a small range by arranging the outer sleeve, the inner cavity of the outer sleeve can be prevented from being leaked by concrete by filling flexible materials between the outer sleeve and the foundation bolt, each foundation bolt keeps certain elasticity on the basis of ensuring accurate coordinates, the foundation bolt can be conveniently and smoothly sleeved into a bolt hole on the equipment when the equipment is seated, and errors of the position of the foundation bolt caused by volume change due to concrete solidification can be compensated.
As a further improvement of the invention, the thread sections at the tops of the foundation bolts are respectively connected with guide sleeves in a screwed mode, and the upper ends of the guide sleeves are respectively provided with conical sharp peaks coaxial with the guide sleeve bodies. The guide sleeve protects the threads of the foundation bolts, so that nuts cannot be screwed when equipment falls down due to thread damage is prevented, the conical pointed top on the upper part of the guide sleeve is convenient to insert into the bolt holes of the equipment, and the difficulty of aligning the foundation bolts when the equipment is lifted and seated is greatly reduced.
As a further improvement of the invention, inclined supports are connected between the opposite long sides of the anchoring frame or the positioning frame, and the anchoring frame or the positioning frame is formed by welding channel steel. The inclined support not only can improve the strength of the frame, but also can make the shape of the anchoring frame or the positioning frame more stable; the anchor channel steel or the positioning channel steel is convenient for correcting the horizontal plane and scribing on the channel steel, so that not only is the accurate coordinates of each foundation bolt ensured, but also the height position is very accurate.
As a further improvement of the present invention, the lower upright comprises an upright steel pipe and an inclined steel pipe. Because the distance between the anchoring frame and the plain concrete cushion layer is far, the level of the anchoring frame is convenient to adjust by cutting the upright steel pipes with the same length, and the inclined steel pipes not only can play a supporting role, but also can enable the position of the anchoring frame to be more stable.
As a further improvement of the invention, the upper upright is cut from channel steel, the lower end of the upper upright is welded with the anchoring frame, and the upper end of the upper upright is welded with the positioning frame. The positioning frame and the anchoring frame can be ensured to be parallel to each other, so that the construction is faster and more convenient.
The invention further aims to overcome the problems in the prior art and provide a method for installing the foundation of large equipment, which can ensure that the coordinates of a plurality of foundation bolts are accurate, the anchoring force with foundation concrete is large, and the equipment can be successfully hoisted in place once.
In order to solve the technical problems, the invention relates to a ground anchor installation method of large equipment, which sequentially comprises the following steps: pouring a plain concrete cushion layer at the bottom of a foundation pit of an equipment foundation, and after the plain concrete cushion layer is solidified, drawing an outline of the equipment base and a central line of a foundation bolt hole on the top surface of the plain concrete cushion layer; binding a bottom layer of steel bars above the plain concrete cushion layer, and binding a vertical bar and a middle layer of steel bars upwards after binding of the bottom layer of steel bars is completed; thirdly, an anchoring frame is welded above the middle layer steel bars, the bottom of the anchoring frame is supported on the plain concrete cushion layer through upright steel pipes and inclined steel pipes, the anchoring frame is formed by welding anchoring channel steel along a horizontal plane, the central lines of the anchoring channel steel are respectively aligned with the central lines of foundation bolt holes on the plain concrete cushion layer, the openings of the anchoring channel steel are upward, and the bottom surface level of the anchoring frame is corrected; the method comprises the steps of fourthly, welding upper upright posts above anchor frames, welding positioning frames at the tops of the upper upright posts, wherein the positioning frames are formed by welding positioning channel steel along a horizontal plane, the central line of each positioning channel steel is aligned with the central line of the anchor channel steel right below, the opening of each positioning channel steel is downward, and the top surface of the positioning frames is corrected to be horizontal; fifthly, marking the coordinate positions of the anchor bolts on the top surface of the positioning frame by adopting a cross center line, respectively drawing a projection circle of the anchor bolts and a projection circle of the outer sleeve by taking the center point of each anchor bolt as the center of a circle, wherein the inner diameter of the outer sleeve is 1.5-2.5 times of the outer diameter of the anchor bolts; cutting positioning holes for the anchor bolts to pass through on the positioning frame along the projection circles of the anchor bolts; respectively penetrating the threaded ends of the foundation bolts from bottom to top from the positioning holes of the positioning frame, respectively correcting the foundation bolts to a vertical state, and respectively welding the transverse folded edges at the lower ends of the foundation bolts on the anchoring frame; sleeving the outer sleeves on the anchor bolts, aligning the lower ports of the outer sleeves with the projection circles of the outer sleeves respectively, connecting the lower ports of the outer sleeves on the top surface of the positioning frame through spot welding, enabling the upper ports of the outer sleeves to be level with the top surface of the foundation, and filling flexible materials into the inner cavities of the outer sleeves; binding a top layer steel bar, and then upwards standing a vertical die along the outer edge of the plain concrete cushion layer, wherein the vertical die extends to the upper part of the upper port of each outer sleeve; after the central coordinate measurement of each anchor bolt is rechecked, a protective adhesive tape is wound on a thread section at the top of each anchor bolt; and the plain concrete cushion layer is upwards arranged to the upper port of the outer sleeve, so that the concrete pouring of the equipment foundation is completed; after the reinforced concrete layer reaches the strength, placing base sizing blocks beside each foundation bolt, and adjusting the top surfaces of the base sizing blocks to be positioned on the same horizontal plane; tearing off the protective adhesive tape on each anchor bolt, and removing the flexible material in the inner cavity of the outer sleeve; lifting the equipment to the position right above the equipment foundation, enabling each foundation bolt hole on the equipment bottom plate to be aligned with each foundation bolt respectively, and then enabling the equipment to stably fall down until the equipment bottom plate falls on each base sizing block; and (3) screwing off each guide sleeve, sleeving a flat gasket and a spring gasket on each foundation bolt respectively, and screwing up nuts and tightening.
Compared with the prior art, the invention has the following beneficial effects: the method comprises the steps that an outline of an equipment base and a central line of a foundation bolt hole are drawn on the top surface of a plain concrete cushion layer, so that accurate basis is provided for erection of an upper frame; the vertical steel pipes with the same length are cut, so that the horizontal adjustment of the anchoring frame is facilitated, the central lines of the anchoring channel steel are corrected to be aligned with the central lines of the foundation bolt holes respectively, and after the anchoring frame is horizontal, the position of the anchoring frame can be more stable by welding the inclined steel pipes; thirdly, the upper upright posts with the same length are cut, so that the top surface level of the positioning frame can be conveniently corrected, and the projection coincidence of the positioning frame and the anchoring frame also ensures that the central line of the positioning channel steel coincides with the central line of the foundation bolt hole; the method comprises the steps of drawing an anchor bolt projection circle and an outer sleeve projection circle according to a cross center line, cutting a positioning hole along the anchor bolt projection circle by gas cutting, accurately determining the coordinates of each anchor bolt, determining the height position of each anchor bolt by the distance between an anchor frame and the positioning frame, and welding a transverse hem at the lower end on the anchor frame after correcting the verticality of each anchor bolt, wherein the connecting tension of the anchor bolts is ensured firstly, the extremely large tension is ensured to be borne, and secondly, the height of the top of each anchor bolt exposed out of the top surface of a reinforced concrete layer is ensured to be consistent, so that when large equipment is hoisted and placed, each anchor bolt hole on the equipment is sleeved with the corresponding anchor bolt synchronously; secondly, the anchor bolts cannot be affected by late-stage steel bar binding and concrete pouring, and accurate positioning of the anchor bolts is completed; the inner diameter of the outer sleeve is 1.5-2.5 times of the outer diameter of the anchor bolts, so that the upper parts of the anchor bolts can shake to a certain extent, errors of the positions of the anchor bolts caused by volume change due to concrete solidification can be compensated, and the anchor bolts can be conveniently and smoothly sleeved in bolt holes on equipment when the equipment is seated; the filled flexible material can prevent mortar from falling into the inner cavity of the outer sleeve during pouring, and is convenient to clean after pouring; the sixth protective adhesive tape can protect the thread section at the top of the foundation bolt from being adhered with mortar, and can prevent the thread from being knocked when the steel bar is pricked; and the sizing block of the base is placed beside the foundation bolt, so that the deformation of the bottom plate of the equipment can be reduced when the bolt is tightened, and the cast iron base is prevented from cracking.
As an improvement of the invention, in the step, after the protective adhesive tape is torn off, the thread sections of the foundation bolts are respectively screwed with the guide sleeves, and the upper ends of the guide sleeves are respectively provided with conical sharp peaks coaxial with the guide sleeve body. The guide sleeve protects the threads of the foundation bolts, so that nuts cannot be screwed when equipment falls down due to thread damage is prevented, the conical pointed top on the upper part of the guide sleeve is convenient to insert into the bolt holes of the equipment, and the difficulty of aligning the foundation bolts when the equipment is lifted and seated is greatly reduced.
As a further improvement of the invention, the method further comprises the step of: all gaps between the equipment bottom plate and the top surface of the equipment foundation are grouted by damping compression-resistant epoxy resin, and the grouting of the damping compression-resistant epoxy resin sequentially comprises the following steps: (1) the raw materials, bisphenol A type epoxy resin, are prepared according to the following components by weight: 100 parts; polyamide curing agents: 40-50 parts; nano silicon dioxide: 20-30 parts; glass fiber: 8-10 parts; (2) separating net-shaped expansion joints from the top surface of the foundation by adopting a wood board with the thickness of 20mm, wherein the size of the surrounding area of each expansion joint is not more than 2m x 2m; (3) pouring bisphenol A epoxy resin into a portable stirrer, starting the portable stirrer to keep the rotation speed of the portable stirrer at 250 revolutions per minute, and then pouring polyamide curing agent into the portable stirrer to continuously stir for 2-4 minutes; (4) pouring the mixed bisphenol A epoxy resin and polyamide curing agent into a vertical stirrer, starting the vertical stirrer to keep the rotating speed at 20 revolutions per minute, adding silicon dioxide and glass fiber, and continuously stirring for 5 minutes; (5) the materials in the vertical mixer flow into a high-level hopper, grouting is carried out from an outlet of the high-level hopper to the top surface of the equipment foundation, grouting is carried out from one side of the equipment foundation to the other side of the equipment foundation, the grouting process is continuous and vibration is avoided, (6) an ash knife is used for smoothing the surface after grouting is completed for two hours; (7) and removing the template and the expansion joint wood board after the grouting layer is finally set. The invention rapidly and uniformly mixes bisphenol A epoxy resin and polyamide curing agent, then adds aggregate nano silicon dioxide and glass fiber, and slowly stirs until all the materials are wet, the bonding strength of the prepared shock-absorbing compression-resistant epoxy resin to steel is not lower than 20MPa, and the bonding strength to concrete is not lower than 10MPa; the bonding strength between the traditional cement grouting and the equipment base is less than 5MPa, and cracks are easy to generate. The vibration of the cement paste cannot be effectively reduced, the vibration attenuation capacity of the damping and compression-resistant epoxy resin is 7.5 times of that of cement and 30 times of that of steel, the pump can reduce the vertical vibration value to below 2mm/s, the damage of a mechanical shaft seal is prevented, the service life of the equipment is prolonged, and the operation precision of the equipment is improved. The shrinkage rate of the cement grouting after solidification is 0.3-0.5%, and the shrinkage rate of the shock-absorbing compression-resistant epoxy resin after solidification is below two parts per million. The cement grouting can be completely hardened after more than five days, and the damping and compression-resistant epoxy resin can be put into operation after 36 hours at 25 ℃, so that the downtime is greatly reduced. The compressive strength of the cement grouting is 40-60 MPa, and the compressive strength of the damping and compression-resistant epoxy resin is more than 100 MPa. The damping and compression-resistant epoxy resin has no capillary holes, completely prevents corrosion of acid, alkali, oil and the like, and does not damage the base.
Drawings
The invention will now be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration only and are not intended to limit the invention.
Fig. 1 is a schematic structural view of a foundation embedding device of a large-scale apparatus according to the present invention.
Fig. 2 is a partial enlarged view of fig. 1.
In the figure: 1. plain concrete cushion layer; 2. a reinforced concrete layer; 2a, bottom layer reinforcing steel bars; 2b, middle layer steel bars; 2c, top layer steel bars; 3. an anchor bolt; 4. an anchor frame; 5a, erecting a steel pipe; 5b, inclined steel pipes; 6. a positioning frame; 7. an upper column; 8. an outer sleeve; 9. a guide sleeve; 9a, conical sharp peaks; 10. a flexible material.
Detailed Description
As shown in fig. 1 and 2, the anchor pre-burying device of the large-scale equipment comprises a plain concrete cushion layer 1, wherein a reinforced concrete layer 2 is arranged above the plain concrete cushion layer 1, a plurality of anchor bolts 3 are pre-buried at the upper part of the reinforced concrete layer 2, the reinforced concrete layer 2 comprises a bottom layer reinforced steel bar 2a, a middle layer reinforced steel bar 2b and a top layer reinforced steel bar 2c, an anchoring frame 4 is arranged above the middle layer reinforced steel bar 2b, and the bottom of the anchoring frame 4 is supported on the plain concrete cushion layer 1 through a lower upright post; a positioning frame 6 is arranged below the top layer steel bar 2c, and the bottom of the positioning frame 6 is supported on the anchoring frame 4 through an upper upright post 7; the lower ends of the anchor bolts 3 are welded on the anchor frame 4, and the upper ends of the anchor bolts 3 penetrate through corresponding positioning holes of the positioning frame 6.
The anchor frame 4 forms a steel frame platform parallel to the plain concrete cushion layer 1 above the middle layer steel bars 2b, the positioning frame 6 forms a positioning frame 6 parallel to the anchor frame 4 below the top layer steel bars 2c, the lower ends of the anchor bolts 3 are welded on the anchor frame 4, so that the connection tension of the anchor bolts 3 is ensured, the extremely large tension can be borne, the height of the tops of the anchor bolts 3 exposed out of the top surface of the steel bar concrete layer 2 is ensured to be consistent, and when large equipment is hoisted and falls, the anchor bolts 3 are synchronously sleeved into the corresponding anchor bolts 3; the upper parts of the anchor bolts 3 are inserted into corresponding positioning holes of the positioning frame 6, so that the coordinate accuracy of the anchor bolts 3 can be ensured, and the anchor bolts 3 can be kept in a vertical state, so that the equipment is difficult to seat due to the inclination of the upper ends.
The lower extreme of each rag bolt 3 is connected with the horizontal hem, and the horizontal hem of each rag bolt 3 welds on anchor frame 4 respectively. The connection length of each anchor bolt 3 and the anchor frame 4 can be prolonged through the transverse flanging, and the capability of bearing heavy load tensile force of the anchor bolts 3 is improved.
The upper portion periphery cover of each rag bolt 3 is equipped with outer tube 8, and the lower port welding of outer tube 8 is on the top surface of locating frame 6, and the top surface parallel and level of outer tube 8 and reinforced concrete layer 2, the inner chamber of outer tube 8 is filled with flexible material 10. The upper portion that sets up the outer tube 8 and make rag bolt 3 can rock in very little scope, is filled with flexible material 10 between outer tube 8 and the rag bolt 3 can avoid the concrete to leak the inner chamber of people outer tube 8, and each rag bolt 3 keeps certain elasticity on guaranteeing the accurate basis of coordinate, in the bolt hole that can embolia equipment smoothly when equipment is sitting in the convenience, can compensate the concrete and solidify the error that makes the rag bolt position that the volume variation caused.
The tops of the foundation bolts 3 are respectively screwed with guide sleeves 9, and each guide sleeve 9 is respectively provided with a conical tip 9a coaxial with the guide sleeve body. The thread of the foundation bolt 3 is protected by the guide sleeve 9, the situation that nuts cannot be screwed due to the fact that the threads of the foundation bolt 3 are damaged by collision is prevented, the conical pointed top 9a on the upper portion of the guide sleeve 9 is convenient to insert into the bolt hole of the equipment, and the difficulty in hoisting and seating of the equipment is greatly reduced.
The anchor frame 4 or the positioning frame 6 is welded by channel steel. The lower upright comprises upright steel pipes 5a and inclined steel pipes 5b.
The upper upright post 7 is formed by cutting channel steel, the lower end of the upper upright post 7 is welded with the anchoring frame 4, and the upper end of the upper upright post 7 is welded with the positioning frame 6. The positioning frame 6 and the anchoring frame 4 can be ensured to be parallel to each other, and the construction is quick and convenient.
The invention relates to a foot installation method of large-scale equipment, which sequentially comprises the following steps: casting a plain concrete cushion layer at the bottom of a foundation pit of an equipment foundation, and after the plain concrete cushion layer is solidified, drawing an outline of the equipment base and a central line of a foundation bolt hole on the top surface of the plain concrete cushion layer.
The steel bars of the bottom layer are bound above the plain concrete cushion layer, and after the binding of the steel bars of the bottom layer is completed, the vertical bars and the middle layer steel bars are bound upwards.
The method comprises the steps of cutting a plurality of vertical steel pipes with the same length, supporting the lower ends of the vertical steel pipes on an plain concrete cushion layer, welding an anchor frame above the vertical steel pipes, wherein the anchor frame is positioned above a middle layer steel bar, the anchor frame is formed by welding anchor channel steel along a horizontal plane, the central lines of the anchor channel steel are respectively aligned with the central lines of foundation bolt holes on the plain concrete cushion layer, the openings of the anchor channel steel are upward, the bottom surface level of the anchor frame is corrected, oblique steel pipes are welded below the anchor frame after correction is finished, and the lower ends of the oblique steel pipes are supported on the plain concrete cushion layer, so that the anchor frame is more stable.
The channel steel with the same length is cut to be used as an upper upright post, the upper upright posts are welded above the anchoring frame, the top of each upper upright post is welded with a positioning frame, the positioning frame is formed by welding positioning channel steel along a horizontal plane, the central line of each positioning channel steel is respectively aligned with the central line of the anchoring channel steel right below, the opening of each positioning channel steel is downward, and the top surface level of the positioning frame is corrected.
Fifthly, marking the coordinate positions of the anchor bolts on the top surface of the positioning frame by adopting a cross center line, respectively drawing a projection circle of the anchor bolts and a projection circle of the outer sleeve by taking the center point of each anchor bolt as the center of a circle, wherein the inner diameter of the outer sleeve is 1.5-2.5 times of the outer diameter of the anchor bolts.
Sixth, positioning holes for the anchor bolts to pass through are cut on the positioning frame along the projection circles of the anchor bolts.
And respectively penetrating the threaded ends of the foundation bolts out of the positioning holes of the positioning frame from bottom to top, respectively correcting the foundation bolts to a vertical state, and respectively welding the transverse folded edges at the lower ends of the foundation bolts on the anchoring frame.
And sleeving the outer sleeves on the anchor bolts, aligning the lower ports of the outer sleeves with the projection circles of the outer sleeves respectively, connecting the lower ports on the top surface of the positioning frame through spot welding, aligning the upper ports of the outer sleeves with the top surface of the foundation, filling flexible materials into the inner cavities of the outer sleeves, and avoiding mortar from falling into the inner cavities of the outer sleeves during pouring.
Binding the top layer steel bars, and then upwards standing a vertical mould along the outer edge of the plain concrete cushion layer, wherein the vertical mould extends to the upper part of the upper port of each outer sleeve.
After the central coordinate measurement of each foundation bolt is rechecked, a protective adhesive tape is wound on the thread section at the top of each foundation bolt, so that the thread section at the top of each foundation bolt is protected from being bonded with mortar, and the thread is prevented from being knocked when a reinforcing steel bar is pricked.
And the plain concrete cushion layer is upwards arranged to the upper port of the outer sleeve, so that the concrete pouring of the equipment foundation is completed.
After the reinforced concrete layer reaches the strength, the base sizing blocks are placed beside the foundation bolts, and the top surfaces of the base sizing blocks are adjusted to be positioned on the same horizontal plane.
Tearing off the protective adhesive tape on each anchor bolt, and removing the flexible material in the inner cavity of the outer sleeve; the thread sections of the foundation bolts are respectively screwed with guide sleeves, and the upper ends of the guide sleeves are respectively provided with conical sharp peaks coaxial with the guide sleeve body.
Lifting the equipment to the position right above the equipment foundation, enabling each foundation bolt hole on the equipment bottom plate to be aligned with each foundation bolt respectively, and then enabling the equipment to stably fall down until the equipment bottom plate falls on each base sizing block; the volume of the concrete can change to a certain extent when the concrete is solidified, the embedding precision of the foundation bolt is affected, the gap between the outer sleeve and the foundation bolt provides an elastic shaking space for the foundation bolt, and the error of the position of the foundation bolt caused by the volume change due to the solidification of the concrete can be compensated.
And (3) screwing off each guide sleeve, sleeving a flat gasket and a spring gasket on each foundation bolt respectively, and screwing up nuts and tightening.
And then grouting all gaps between the equipment bottom plate and the top surface of the equipment foundation by adopting damping compression-resistant epoxy resin, wherein the grouting of the damping compression-resistant epoxy resin sequentially comprises the following steps: (1) the raw materials, bisphenol A type epoxy resin, are prepared according to the following components by weight: 100 parts; polyamide curing agents: 40-50 parts; nano silicon dioxide: 20-30 parts; glass fiber: 8-10 parts; (2) separating net-shaped expansion joints from the top surface of the foundation by adopting a wood board with the thickness of 20mm, wherein the size of the surrounding area of each expansion joint is not more than 2m x 2m; (3) pouring bisphenol A epoxy resin into a portable stirrer, starting the portable stirrer to keep the rotation speed of the portable stirrer at 250 revolutions per minute, and then pouring polyamide curing agent into the portable stirrer to continuously stir for 2-4 minutes; (4) pouring the mixed bisphenol A epoxy resin and polyamide curing agent into a vertical stirrer, starting the vertical stirrer to keep the rotating speed at 20 revolutions per minute, adding silicon dioxide and glass fiber, and continuously stirring for 5 minutes; (5) the materials in the vertical mixer flow into a high-level hopper, grouting is carried out from an outlet of the high-level hopper to the top surface of the equipment foundation, grouting is carried out from one side of the equipment foundation to the other side of the equipment foundation, the grouting process is continuous and vibration is avoided, (6) an ash knife is used for smoothing the surface after grouting is completed for two hours; (7) and removing the template and the expansion joint wood board after the grouting layer is finally set.
The bonding strength of the damping compression-resistant epoxy resin to steel is not lower than 20MPa, the bonding strength to concrete is not lower than 10MPa, the vibration damping capacity is 7.5 times of that of cement, the steel is 30 times, and the shrinkage rate after solidification is below two parts per million. The equipment can be put into operation only for 36 hours at 25 ℃, and the compressive strength is more than 100 MPa; the pore is not formed, so that the erosion of acid, alkali, oil and the like is completely prevented, and the base is not damaged.
The foregoing description is only of a preferred embodiment of the invention and is not intended to limit the scope of the invention. In addition to the above embodiments, other embodiments of the present invention are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present invention. The technical features of the present invention that are not described may be implemented by or using the prior art, and are not described herein.
Claims (2)
1. The foundation bolt installation method of the large-scale equipment is characterized by comprising the following steps in sequence: pouring a plain concrete cushion layer at the bottom of a foundation pit of an equipment foundation, and after the plain concrete cushion layer is solidified, drawing an outline of the equipment base and a central line of a foundation bolt hole on the top surface of the plain concrete cushion layer; binding a bottom layer of steel bars above the plain concrete cushion layer, and binding a vertical bar and a middle layer of steel bars upwards after binding of the bottom layer of steel bars is completed; thirdly, an anchor frame is welded above the middle layer steel bars, the bottom of the anchor frame is supported on the plain concrete cushion layer through upright steel pipes and inclined steel pipes, the anchor frame is formed by welding anchor channel steel along a horizontal plane, the central lines of the anchor channel steel are respectively aligned with the central lines of foundation bolt holes, the openings of the anchor channel steel are upward, and the bottom surface level of the anchor frame is corrected; the method comprises the steps of fourthly, welding upper upright posts above anchor frames, welding positioning frames at the tops of the upper upright posts, wherein the positioning frames are formed by welding positioning channel steel along a horizontal plane, the central line of each positioning channel steel is aligned with the central line of the anchor channel steel right below, the opening of each positioning channel steel is downward, and the top surface of the positioning frames is corrected to be horizontal; fifthly, marking the coordinate positions of the anchor bolts on the top surface of the positioning frame by adopting a cross center line, respectively drawing a projection circle of the anchor bolts and a projection circle of the outer sleeve by taking the center point of each anchor bolt as the center of a circle, wherein the inner diameter of the outer sleeve is 1.5-2.5 times of the outer diameter of the anchor bolts; cutting positioning holes for the anchor bolts to pass through on the positioning frame along the projection circles of the anchor bolts; respectively penetrating the threaded ends of the foundation bolts from bottom to top from the positioning holes of the positioning frame, respectively correcting the foundation bolts to a vertical state, and respectively welding the transverse folded edges at the lower ends of the foundation bolts on the anchoring frame; sleeving the outer sleeves on the anchor bolts, aligning the lower ports of the outer sleeves with the projection circles of the outer sleeves respectively, connecting the lower ports of the outer sleeves on the top surface of the positioning frame through spot welding, enabling the upper ports of the outer sleeves to be level with the top surface of the foundation, and filling flexible materials into the inner cavities of the outer sleeves; binding a top layer steel bar, and then upwards standing a vertical die along the outer edge of the plain concrete cushion layer, wherein the vertical die extends to the upper part of the upper port of each outer sleeve; after the central coordinate measurement of each anchor bolt is rechecked, a protective adhesive tape is wound on a thread section at the top of each anchor bolt; and the plain concrete cushion layer is upwards arranged to the upper port of the outer sleeve, so that the concrete pouring of the equipment foundation is completed; after the reinforced concrete layer reaches the strength, placing base sizing blocks beside each foundation bolt, and adjusting the top surfaces of the base sizing blocks to be positioned on the same horizontal plane; tearing off the protective adhesive tape on each anchor bolt, and removing the flexible material in the inner cavity of the outer sleeve; the thread sections of the foundation bolts are respectively screwed with guide sleeves, and the upper ends of the guide sleeves are respectively provided with conical sharp peaks coaxial with the guide sleeve body; lifting the equipment to the position right above the equipment foundation, enabling each foundation bolt hole on the equipment bottom plate to be aligned with each foundation bolt respectively, and then enabling the equipment to stably fall down until the equipment bottom plate falls on each base sizing block; and (3) screwing off each guide sleeve, sleeving a flat gasket and a spring gasket on each foundation bolt respectively, and screwing up nuts and tightening.
2. The method of installing an anchor bolt for a large-scale installation according to claim 1, further comprising the steps of: all gaps between the equipment bottom plate and the top surface of the equipment foundation are grouted by damping compression-resistant epoxy resin, and the grouting of the damping compression-resistant epoxy resin sequentially comprises the following steps: (1) the raw materials, bisphenol A type epoxy resin, are prepared according to the following components by weight: 100 parts; polyamide curing agents: 40-50 parts; nano silicon dioxide: 20-30 parts; glass fiber: 8-10 parts; (2) a net-shaped expansion joint is separated from the top surface of the foundation by adopting a wood board with the thickness of 20mm, and the size of the surrounding area of each expansion joint is not more than 2m multiplied by 2m; (3) pouring bisphenol A epoxy resin into a portable stirrer, starting the portable stirrer to keep the rotation speed of the portable stirrer at 250 revolutions per minute, and then pouring polyamide curing agent into the portable stirrer to continuously stir for 2-4 minutes; (4) pouring the mixed bisphenol A epoxy resin and polyamide curing agent into a vertical stirrer, starting the vertical stirrer to keep the rotating speed at 20 revolutions per minute, adding nano silicon dioxide and glass fiber, and continuously stirring for 5 minutes; (5) the materials in the vertical mixer flow into a high-level hopper, grouting is carried out from an outlet of the high-level hopper to the top surface of the equipment foundation, grouting is carried out from one side of the equipment foundation to the other side of the equipment foundation, the grouting process is continuous and vibration is avoided, (6) an ash knife is used for smoothing the surface after grouting is completed for two hours; (7) and removing the template and the expansion joint wood board after the grouting layer is finally set.
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| CN201810519691.4A CN108677997B (en) | 2018-05-28 | 2018-05-28 | Foundation bolt installation method of large-scale equipment |
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| CN201810519691.4A CN108677997B (en) | 2018-05-28 | 2018-05-28 | Foundation bolt installation method of large-scale equipment |
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| CN108677997B true CN108677997B (en) | 2023-06-16 |
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| CN101666100B (en) * | 2009-09-15 | 2011-11-16 | 中冶实久建设有限公司 | Method for accurately installing large foundation bolt of industrial equipment foundation |
| CN202302576U (en) * | 2011-11-01 | 2012-07-04 | 天津二十冶建设有限公司 | Adjustable foundation bolt for mounting equipment with larger vibration |
| CN103590416B (en) * | 2013-11-01 | 2016-03-16 | 浙江水利水电学院 | Foot bolt Embedment Construction engineering method accurately |
| CN204040056U (en) * | 2014-06-26 | 2014-12-24 | 中国建筑第八工程局有限公司 | A kind of location and installation support of pre-embedded anchoring bolts |
| CN108035554B (en) * | 2017-11-24 | 2020-09-08 | 常州第一建筑集团有限公司 | Construction method of section steel column support frame of super high-rise building frame column |
| CN208455659U (en) * | 2018-05-28 | 2019-02-01 | 中石化石油工程技术服务有限公司 | A kind of lower margin pre-embedded device of large scale equipment |
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