Steel structure construction method based on micro-vibration control

Abstract

The present invention provides a steel structure construction method based on micro-vibration control, including: forming a cap cushion layer by pouring concrete, and laying the bottom reinforcement of the cap to be constructed; fixing the anchor rod on the cushion layer by a limit device, and fixedly connected with the bottom reinforcement; wherein, setting a lower end adjustable nut on the anchor rod; after protecting the anchor rod and the lower end adjustable nut, pouring the cap bottom at one time; installing a steel column on the anchor rod, and adjusting the column top elevation of the steel column by the lower end adjustable nut, after the steel column is in place, locking the anchor rod and the steel column by the upper end fixed locking nut; pouring concrete on the steel column, forming a cap on the one-time pouring of the cap bottom; installing a waterproof protective layer on the outer wall of the steel column and the top of the cap, and pouring a raft foundation around the steel column above the cap to form a rigid column steel structure. The above invention can reduce the disturbance of the raft foundation due to construction conditions and achieve the effect of preventing micro-vibration.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and more specifically, to a steel structure construction method based on micro-vibration control. Background Art

[0002] With the continuous development of science and technology, modern high-tech scientific research buildings have increasingly stringent standards for micro-vibration. These scientific research facilities not only have extremely high requirements for the micro-vibration of the raft foundation, but also face the challenges of the building's own settlement and the flatness of a large area of ​​ultra-flat ground. To meet these precise requirements, it is necessary to comprehensively consider how to reduce uneven settlement of the building, reduce the impact of vibration during construction, and isolate it, and reduce the interference of external vibration on the building.

[0003] At present, in traditional structural construction, large-volume rafts are usually constructed using the partitioned skipping method. The steel structure is installed within the scope of the corresponding completed block raft, and the crane position follows the principle of proximity to meet the bearing capacity requirements. This construction method has clear overlap procedures, flow-line operations of civil engineering and steel structures, and relatively simple mechanical equipment selection. However, this method is difficult to effectively solve the problems of vibration caused by construction on the raft on the raft foundation and uneven settlement of the raft foundation. Especially for those projects with extremely high requirements for micro-vibration, it is often difficult to meet the micro-vibration standards of scientific research buildings. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a steel structure construction method based on micro-vibration control to solve the problems that the existing construction cannot effectively solve the vibration of the raft foundation caused by construction on the raft and the uneven settlement of the raft foundation.

[0005] The steel structure construction method based on micro-vibration control provided by the present invention comprises forming a cap cushion layer by pouring concrete, and laying the bottom reinforcement of the cap to be constructed; fixing the anchor rod on the cushion layer by a limiting device, and fixedly connecting the anchor rod with the bottom reinforcement; wherein the anchor rod is provided with a lower end adjustable nut;

[0006] After the anchor rod and the lower adjustable nut are protected, the base cap is poured at one time;

[0007] Install a steel column above the anchor rod, and adjust the top elevation of the steel column by means of the adjustable nut at the lower end. After the steel column is in place, the anchor rod and the steel column are locked in position by means of the upper fixing locking nut.

[0008] Concrete is poured on the steel column, and a cap is formed on the bottom of the once poured cap;

[0009] Install a waterproof protective layer on the outer wall of the steel column and the top of the bearing platform, and pour a raft foundation around the steel column above the bearing platform to form a stiffened column steel structure.

[0010] In addition, a preferred technical solution is that the height of the bottom of the first-poured bearing platform is lower than the height of the lower adjustable nut, and an adjustment space for the lower adjustable nut is reserved.

[0011] In addition, a preferred technical solution is that the limiting device includes at least two layers of frame-shaped fixing frames; among them, the frame-shaped fixing frame is in the shape of "mouth" or "hui".

[0012] There are at least four anchor bolts, and the anchor bolts are fixed at the four corner positions of the frame-shaped fixing frame.

[0013] In addition, a preferred technical solution is to install a steel column above the anchor bolt, and adjust the column top elevation of the steel column through the lower adjustable nut. After the steel column is in place, lock the positions of the anchor bolt and the steel column through the upper fixed locking nut, including:

[0014] Pass the column base plate of the steel column through the anchor bolt and limit it above each lower adjustable nut;

[0015] Adjust the position of the lower adjustable nut on the anchor bolt to adjust the inclination and column top elevation of the steel column;

[0016] After the position of the steel column is determined, lock and limit the anchor bolt and the column base plate through the upper fixed locking nut, and the column base plate is located between the lower adjustable nut and the upper fixed locking nut.

[0017] In addition, a preferred technical solution is that before pouring concrete into the steel column, it includes:

[0018] Pour self-compacting concrete into the gap between the column base plate and the bottom of the first-poured bearing platform.

[0019] In addition, a preferred technical solution is that pouring concrete into the steel column includes:

[0020] Bind steel bars outside the steel column and build a pouring formwork;

[0021] Pour concrete into the pouring formwork, and make the height of the concrete greater than the height of the raft foundation to form concrete-filled steel column;

[0022] After the concrete reaches the preset strength requirement, remove the pouring formwork.

[0023] In addition, a preferred technical solution is that the height of the concrete is at least 200 mm greater than the height of the raft foundation.

[0024] In addition, a preferred technical solution is to install a waterproof protective layer on the outer side wall of the steel column and the top of the cap, including:

[0025] Laying a first waterproof protective layer on the top surface of the cap, wherein the first waterproof protective layer extends to the concrete covering of the steel column;

[0026] A second waterproof protective layer is arranged on the outer side of the steel column wrapped with concrete, the lower end of the second waterproof protective layer is in contact with the first waterproof protective layer, and the upper end of the second waterproof protective layer is not lower than the height of the raft foundation.

[0027] In addition, a preferred technical solution is that the second waterproof protective layer after unfolding includes a plurality of isosceles fan-shaped or isosceles trapezoidal structures connected in sequence; wherein, when the end to end of the second waterproof protective layer is connected, the isosceles fan-shaped or isosceles trapezoidal forms a circular structure surrounding the steel column and wrapped with concrete.

[0028] In addition, a preferred technical solution is that the inclination angle of the side of the isosceles fan or the isosceles trapezoid is 10° to 20°.

[0029] By using the above-mentioned steel structure construction method based on micro-vibration control, the cap, steel column and concrete are first constructed and then a large-volume concrete raft foundation is poured. This can effectively solve the problem of uneven settlement of the raft caused by the lifting machinery on the raft, as well as the settlement effect of the temporary mechanical equipment load on the local raft. At the same time, it can also solve the problem of filling the waterproof protective layer, ensure the effective isolation between the cap, steel column and raft foundation, thereby reducing the disturbance of the raft foundation due to construction conditions and achieving the purpose of preventing micro-vibration.

[0030] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0032] Figure 1 is a flow chart of a steel structure construction method based on micro-vibration control according to an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of steel structure construction based on micro-vibration control according to an embodiment of the present invention;

[0034] Figure 3 It is a partial schematic diagram of a waterproof protective layer according to an embodiment of the present invention.

[0035] The accompanying drawings are marked with the following: steel column 1, anchor rod 2, lower end adjustable nut 3, upper end fixed locking nut 4, limiting device 5, pedestal 6, waterproof protective layer 7, isosceles trapezoid 701, first waterproof protective layer 72, second waterproof protective layer 71, raft foundation 9, steel column wrapped with concrete 10.

[0036] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0037] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0038] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that the term "and / or" used herein includes any unit and all combinations of one or more associated listed items.

[0040] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with their meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein.

[0041] To describe in detail the steel structure construction method based on micro-vibration control within the present invention, the following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0042] Figure 1 The schematic flow of the steel structure construction method based on micro-vibration control according to an embodiment of the present invention is shown; Figure 2 and Figure 3 respectively show the schematic structural principles of the steel structure construction based on micro-vibration control according to an embodiment of the present invention from different perspectives.

[0043] As Figures 1 to 3 collectively shown, the steel structure construction method based on micro-vibration control according to an embodiment of the present invention includes the following steps:

[0044] S100: Form a bearing platform cushion layer by concrete pouring and lay the bottom reinforcement bars of the bearing platform to be constructed.

[0045] S200: Fix the anchor bolts with the ground through a limiting device on the cushion layer and fixedly connect them to the bottom reinforcement bars; wherein, an adjustable nut at the lower end is provided on the anchor bolts with the ground.

[0046] Among them, the limiting device 5 may include at least two layers of frame-shaped fixing frames. Among them, the frame-shaped fixing frames can be set as "mouth" shape or "return" shape. There are at least four anchor bolts with the ground 2, and multiple anchor bolts with the ground 2 are fixed at the four corner positions of the frame-shaped fixing frames. Through the setting of the limiting device 5, it is convenient to fix the anchor bolts with the ground 2, facilitate their fixed connection with the bottom reinforcement bars, and provide support for the adjustment of the adjustable nut 3 at the lower end in the follow-up. In addition, the anchor bolts with the ground 2 and the limiting device 5 can be prefabricated into an integral structure and can be directly used during the construction process.

[0047] S300: After protecting the anchor bolts with the ground and the adjustable nut at the lower end, pour the bottom of the bearing platform at one time.

[0048] Among them, when pouring the bottom of the bearing platform for the first time, the adjustable nut 3 on the anchor bolts can be protected first to prevent it from being buried by concrete and unable to play a role in adjustment. Then, pour the bottom of the bearing platform at one time, and make the height of the one-time poured bottom of the bearing platform lower than the height of the adjustable nut 3 at the lower end, leaving enough adjustment space for the adjustable nut 3 at the lower end.

[0049] In addition, before pouring the bottom of the pedestal once, this step can also be used to tie the longitudinal reinforcement to form an external steel frame structure of the limiting steel column 1. After the subsequent steel column 1 is in place, concrete is poured on its outside to form a steel column outer concrete 10, and the steel frame structure can be poured and filled with concrete.

[0050] S400: Install a steel column above the anchor rod and adjust the top elevation of the steel column using the adjustable nut at the lower end. After the steel column is in place, lock the anchor rod and the steel column in position using the upper fixed locking nut.

[0051] Among them, first, the column base plate of the steel column 1 is passed through the anchor rod 2 and limited on each lower end adjustable nut 3; then, the position of the lower end adjustable nut 3 on the anchor rod 2 is adjusted to adjust the overall inclination of the steel column 1 and the column top elevation; after the position of the steel column 1 is determined, the anchor rod 2 and the column base plate are locked and limited by the upper end fixed locking nut 4. At this time, the column base plate is limited between the lower end adjustable nut 3 and the upper end fixed locking nut 4. This structure can accurately adjust the position of the steel column 1, thereby improving construction efficiency and convenience of adjustment.

[0052] S500: Concrete is poured on the steel column and a cap is formed on the base of the cap in one pouring.

[0053] Among them, before pouring concrete for the steel column 1, it also includes: pouring self-compacting concrete into the gap between the column base plate and the bottom of the first pouring pedestal, and using the self-compacting concrete to fill the gap between the column base plate and the bottom of the first pouring pedestal reserved for adjusting the position of the steel column 1 in the early stage, and removing the formwork and subsequently pouring the steel column after the self-compacting concrete reaches the strength requirement.

[0054] In addition, when pouring concrete on the steel column 1, it is necessary to tie steel bars outside the steel column 1 and build a casting formwork, wherein the tied steel bars are stirrups arranged on the longitudinal bars, and then pour concrete into the casting formwork, and make the height of the concrete greater than the height of the raft foundation 9, to form a steel column wrapped with concrete 10 and a pedestal 6. After the concrete reaches the preset strength requirement, the casting formwork is removed.

[0055] Specifically, the height of the concrete is at least 200 mm greater than the height of the raft foundation, and can be flexibly set according to construction requirements.

[0056] S600: A waterproof protective layer is installed on the outer wall of the steel column and the top of the pedestal, and a raft foundation is cast around the steel column above the pedestal to form a rigid column steel structure.

[0057] Among them, the waterproof protective layer 7 can be formed by a flexible material and a waterproof protective material, wherein the waterproof material wraps the flexible material, and the waterproof protective layer 7 further includes a first waterproof protective layer 72 and a second waterproof protective layer 71; this step further includes: laying the first waterproof protective layer 72 on the top surface of the base 6, and the first waterproof protective layer 72 extends to the steel column outer concrete 10; and arranging the second waterproof protective layer 71 on the outer side of the steel column outer concrete 10, the lower end of the second waterproof protective layer 71 is in contact with the first waterproof protective layer 72, and the upper end of the second waterproof protective layer 71 is not lower than the height of the raft foundation 9.

[0058] Specifically, in order to ensure effective wrapping protection for the steel column outer concrete 10, the above-mentioned second waterproof protective layer 71 may include a plurality of isosceles fan-shaped or isosceles trapezoidal 7001 structures connected in sequence; wherein, when the head and tail of the second waterproof protective layer 71 are connected, the isosceles fan-shaped or isosceles trapezoidal 701 shape can form a circular structure surrounding the steel column outer concrete 10, and the inclination angle of the side of the isosceles fan-shaped or isosceles trapezoidal 701 is 10°~20°.

[0059] As a specific example, the steel structure construction method based on micro-vibration control according to an embodiment of the present invention may include the following steps:

[0060] Step 1: First, pour the concrete of the pedestal cushion layer and complete the tying of the pedestal bottom reinforcement, that is, the bottom steel bars.

[0061] Step 2: Perform the laying-out operation according to the designed positioning reference, install the anchor rod 2, the lower adjustable nut and the limit device 5, and ensure that the anchor rod 2 is firmly connected to the bottom steel bar;

[0062] Step 3: Implement protective measures on the thread of the anchor rod 2 and the adjustable nut at the lower end, and then pour the cap concrete, control the primary pouring elevation, and form the primary pouring cap bottom;

[0063] Step 4: Install the steel column 1 and adjust the adjustable nut at the lower end of the anchor rod 2 according to the designed positioning elevation. After the steel column 1 is in place, install the upper fixed locking nut 4 to lock the position; then, pour self-compacting concrete between the bottom of the steel column 1 and the bottom of the primary casting pedestal, and remove the formwork after reaching the required strength;

[0064] Step 5, tie the stirrups and support the formwork, pour the concrete to 200 mm above the raft surface, and after the concrete reaches the strength requirement, remove the formwork to form the steel column outer concrete 10 and the cap structure;

[0065] Step 6: a flexible and waterproof protective material is arranged on the top of the platform to form a first waterproof protective layer, wherein the flexible and waterproof protective material leaves a head upward;

[0066] Step 7: Install the flexible and waterproof protective materials around the steel column 1 to form a second waterproof protective layer. The second waterproof protective layer can be formed by splicing 16 to 18 trapezoidal columns. The side angle of each isosceles trapezoid 701 section is about 15°. During installation, the short side of the trapezoid faces the steel column 1 side, and the long side has a certain blunt edge for easy splicing. The waterproof material wraps the flexible material in a circle, which can not only fix the flexible material, but also well protect the flexible material from the raft foundation concrete, forming a rigid column steel structure;

[0067] Step 8: Reinstall the steel column assembly in the raft foundation area in the order of steps 1 to 7;

[0068] Step 9: Tie up the raft reinforcement and set up the formwork, then pour the large volume of raft concrete, and finally form an anti-micro-vibration structural system consisting of a cap, a waterproof protective layer, a steel column assembly and a raft foundation.

[0069] According to the steel structure construction method based on micro-vibration control of the present invention, the uneven settlement of the raft caused by the lifting machinery on the raft and the settlement effect of the temporary mechanical equipment load on the local raft can be solved. At the same time, the difficulty of filling with flexible isolation materials can be overcome to ensure effective isolation between the cap, steel column and raft. The waterproof protective layer adopts a 15° trapezoidal column installation structure, so that the flexible and waterproof materials are effectively embedded together by the extrusion force of concrete, reducing the disturbance of the raft foundation due to construction conditions and achieving the goal of preventing micro-vibration.

[0070] As described above, the steel structure construction method based on micro-vibration control according to the present invention is described by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the steel structure construction method based on micro-vibration control proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A steel structure construction method based on micro-vibration control, characterized in that: Including: Form a bearing platform cushion by pouring concrete and lay the bottom reinforcement bars of the bearing platform to be constructed; Fix the anchor bolts on the cushion through a limiting device and fixedly connect them to the bottom reinforcement bars; wherein, an adjustable nut at the lower end is arranged on the anchor bolts; After protecting the anchor bolts and the adjustable nuts at the lower end, pour the bottom of the bearing platform at one time; Install a steel column above the anchor bolts and adjust the elevation of the top of the steel column through the adjustable nut at the lower end. After the steel column is in place, lock the positions of the anchor bolts and the steel column through a fixing and locking nut at the upper end; Pour concrete for the steel column, and at the same time form a bearing platform on the bottom of the bearing platform poured at one time; Install a waterproof protective layer on the outer side wall of the steel column and the top of the bearing platform, and pour a raft foundation around the steel column above the bearing platform to form a stiff column steel structure.

2. The steel structure construction method based on micro-vibration control according to claim 1 is characterized in that: The height of the bottom of the bearing platform poured at one time is lower than the height of the adjustable nut at the lower end, and an adjustment space for the adjustable nut at the lower end is reserved.

3. The steel structure construction method based on micro-vibration control according to claim 1 is characterized in that: The limiting device includes at least two layers of frame-shaped fixing frames; wherein, The frame-shaped fixing frame is in the shape of "口" or "回"; At least four anchor bolts are provided, and the anchor bolts are fixed at the four corner positions of the frame-shaped fixing frame.

4. The steel structure construction method based on micro-vibration control according to claim 3 is characterized in that: Install a steel column above the anchor bolts and adjust the elevation of the top of the steel column through the adjustable nut at the lower end. After the steel column is in place, lock the positions of the anchor bolts and the steel column through a fixing and locking nut at the upper end, including: Pass the column base plate of the steel column through the anchor bolts and limit it above each adjustable nut at the lower end; Adjust the position of the adjustable nut at the lower end on the anchor bolt to adjust the inclination and the elevation of the top of the steel column; After the position of the steel column is determined, lock and limit the anchor bolts and the column base plate through the fixing and locking nut at the upper end, and the column base plate is located between the adjustable nut at the lower end and the fixing and locking nut at the upper end.

5. The steel structure construction method based on micro-vibration control according to claim 4 is characterized in that: Before pouring concrete for the steel column, including: Pour self-compacting concrete into the gap between the column base plate and the bottom of the bearing platform poured at one time.

6. The steel structure construction method based on micro-vibration control according to claim 1 is characterized in that: Pour concrete for the steel column, including: Bind steel bars outside the steel column and build a pouring formwork; Pour concrete into the pouring formwork and make the height of the concrete greater than the height of the raft foundation to form concrete wrapped around the steel column; After the concrete reaches the preset strength requirement, remove the pouring formwork.

7. The steel structure construction method based on micro-vibration control according to claim 6 is characterized in that: The height of the concrete is greater than the height of the raft foundation by at least 200 mm.

8. The steel structure construction method based on micro-vibration control according to claim 6 is characterized in that: Install a waterproof protective layer on the outer side wall of the steel column and the top of the bearing platform, including: Lay a first waterproof protective layer on the top surface of the bearing platform, and the first waterproof protective layer extends to the concrete wrapped around the steel column; Set a second waterproof protective layer outside the concrete wrapped around the steel column. The lower end of the second waterproof protection contacts the first waterproof protective layer, and the upper end of the second waterproof protective layer is not lower than the height of the raft foundation.

9. The steel structure construction method based on micro-vibration control according to claim 8, characterized in that: The unfolded second waterproof protective layer includes a plurality of isosceles fan-shaped or isosceles trapezoidal structures connected in sequence; wherein, when the second waterproof protective layer is connected end to end, the isosceles fan-shaped or isosceles trapezoidal forms a circular structure surrounding the steel column and wrapped with concrete.

10. The steel structure construction method based on micro-vibration control according to claim 9, characterized in that: The inclination angle of the side of the isosceles fan or the isosceles trapezoid is 10° to 20°.

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