High-precision mounting and fixing construction structure of large-tonnage whole stone parapet wall

Abstract

The utility model provides a high-precision mounting and fixing construction structure for a large-tonnage whole-stone parapet wall, and the structure comprises an embedded foundation assembly which comprises an embedded plate, and a plurality of anchor bars are welded at the bottom of the embedded plate; the positioning and locking assembly comprises two positioning steel bars, the lower parts of the two positioning steel bars correspondingly penetrate through the two oblong holes, and the upper parts of the two positioning steel bars penetrate through the two positioning holes; the three-dimensional dynamic leveling system comprises a four-point synchronous jack, a laser gradienter and a stainless steel gasket group, and the stainless steel gasket group is arranged between the bottom of the whole stone and the embedded plate; the abutted seam control system comprises a stainless steel datum line which is longitudinally arranged in a full-length manner; the thermal deformation compensation system comprises a belleville spring and chloroprene rubber pad combined compensator; and the stress dispersion structure comprises a bottom bedding layer and positioning hole grouting. The technical problems that in the prior art, a whole stone parapet wall is low in hoisting precision, insufficient in contact and large in abutted seam error are solved.

Description

Technical Field

[0001] This application relates to the field of building construction technology, specifically to a high-precision installation and fixing construction structure for large-tonnage solid stone parapet walls, which is particularly suitable for the high-precision installation and fixing of irregularly shaped Mongolian black chopped basalt stone, solving problems such as large positioning deviation, lack of thermal deformation compensation, and stress concentration in traditional technologies. Background Technology

[0002] The installation of monolithic stone parapet walls in construction projects faces numerous technical challenges. Current technologies present several difficulties in hoisting large-tonnage stone slabs:

[0003] (1) When hoisting large-tonnage stone materials, they are easily affected by wind load and sling swing, which can lead to excessive positioning deviation and insufficient positioning accuracy.

[0004] (2) When the bottom surface of the whole stone does not make sufficient contact with the embedded plate, local stress concentration may cause the risk of hollowing. Local hollowing is prone to stress concentration and poses a safety hazard.

[0005] (3) The cumulative error of the joints of multiple stone pieces can easily lead to misalignment, making it difficult to meet the accuracy requirement of straightness ≤1mm;

[0006] (4) Existing technologies lack adaptability to thermal deformation; the thermal expansion coefficient of basalt is α = 8 × 10⁻ 6 / ℃, a 10m length can expand and contract by 2.4mm under a temperature difference of 30℃, and rigid connections are prone to misalignment of the joints.

[0007] Related patented technologies have undergone certain improvements. For example, Chinese utility model patent CN214462544U discloses a novel parapet wall formwork reinforcement tool, including: a horizontal support and a vertical longitudinal support located at the lower end of the horizontal support, the longitudinal support including an inner longitudinal support and an outer longitudinal support; a first waist hole is opened on the horizontal support; a second waist hole is opened on the upper part of both the inner and outer longitudinal supports, and a reserved hole is opened on the lower part of both; the first waist hole is connected and fixed to the top of the outer longitudinal support by screws, the two second waist holes are connected and fixed by a first tie rod, and the two reserved holes are connected and fixed by a second tie rod; the inner longitudinal support is connected and fixed to the roof concrete by a turnbuckle. However, analysis of this solution shows that its parapet wall formwork reinforcement tool only solves the stability of the formwork, does not address the positioning accuracy of the stone, and does not have a thermal deformation compensation design.

[0008] The fixing devices disclosed in the relevant patents still have problems such as insufficient leveling accuracy, poor stress dispersion effect, and limited joint control methods, which cannot effectively solve the installation and fixing needs of 1.2-ton basalt whole stones. Summary of the Invention

[0009] In view of the shortcomings of the existing technology, this application aims to provide a millimeter-level dynamic leveling, stress dispersion control, and thermal deformation compensation installation and fixing construction structure for large-tonnage solid stone parapet walls. Through multi-dimensional collaboration, it achieves high-precision positioning, uniform stress distribution, and reliable connection of solid stone parapet walls, solving the technical problems of low hoisting accuracy, insufficient contact, and large joint errors in the existing technology.

[0010] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0011] This application provides a high-precision installation and fixing construction structure for a large-tonnage solid stone parapet wall. The large-tonnage solid stone parapet wall is formed by multiple large-tonnage solid stones arranged longitudinally in a straight line. Each solid stone has two vertical positioning holes at its bottom. The installation and fixing construction structure mainly includes:

[0012] The embedded foundation component includes an embedded plate, with multiple anchor bars welded to the bottom of the embedded plate. The multiple anchor bars are welded to the ground beam reinforcement bars, and two elongated holes are opened on the embedded plate.

[0013] The positioning and locking assembly includes two positioning steel bars, the lower parts of which are respectively inserted into the two elongated holes and welded to the embedded plate, and the upper parts are inserted into the two positioning holes.

[0014] The three-dimensional dynamic leveling system includes a four-point synchronous jack, a laser level, and a stainless steel shim set. The stainless steel shim set is placed between the bottom of the whole stone and the pre-embedded plate. The four-point synchronous jack is used for initial adjustment, and the stainless steel shim set is used for fine adjustment. Combined with the scanning of the laser level, the flatness of the whole stone is ≤0.5mm / 2m.

[0015] The seam control system includes a longitudinally arranged stainless steel baseline, a hydraulic jacking device, and a 0.01mm digital feeler gauge to control the seam width, achieving a seam straightness of ≤1mm.

[0016] The heat deformation compensation system includes a combination compensator of disc springs and neoprene pads;

[0017] The stress-dispersing structure includes a bottom grouting layer and positioning hole grouting. The bottom grouting layer uses C40 non-shrink cement-based mortar for grouting, combined with C60 high-strength non-shrink grouting material for pressure grouting, to disperse structural stress.

[0018] Preferably, multiple large-tonnage whole stones are arranged in a stepped line along the longitudinal direction, and each whole stone has a horizontal grouting hole on its side, and the grouting hole is connected to two positioning holes.

[0019] Preferably, the two positioning holes have a diameter of Φ50mm, and the grouting hole has a diameter of Φ40mm.

[0020] Preferably, the embedded plates are arranged in a stepped line along the longitudinal direction, and four plates form a whole, with the lower edge of the step bending vertically downward.

[0021] Preferably, the embedded plate is made of Q355B steel plate with a thickness of ≥10mm and a planar dimension exceeding the projection surface of the whole stone by more than 100mm. The anchor bar is 4×Φ25HRB400 and is welded to the ground beam reinforcement bar by double-sided welding.

[0022] Preferably, the positioning steel bar is welded to the embedded plate by through-hole plug welding, and after welding, it is coated with epoxy zinc-rich paint with a total thickness ≥180μm.

[0023] Preferably, the fine-tuning accuracy of the four-point synchronous jack is 0.01 mm / division;

[0024] The stainless steel gasket set is a 304 stainless steel gasket set with specifications of 0.1mm, 0.5mm, 1.0mm, and 2.0mm.

[0025] Preferably, the joint control system includes a longitudinally continuous Φ1mm stainless steel reference line, with every 4 whole stones forming a closed-loop correction unit, and is equipped with a 5t thrust hydraulic jacking device and a 0.01mm digital feeler gauge to control the joint width, so as to achieve a joint straightness of ≤1mm.

[0026] Preferably, the compensation amount of the disc spring and neoprene pad combination compensator is ±0.5mm / ℃, which is suitable for temperature differences from -10℃ to +40℃, and the compensation error of the expansion and contraction amount is ≤0.1mm under a temperature difference of 30℃ over a length of 10m.

[0027] Preferably, the large-tonnage whole stone is made of irregularly shaped Mongolian black chopped granite or basalt, with a stone thickness of 400-500mm, a height of 1400-1500mm, a width of 700-800mm, and a single stone weight of not less than 1.2 tons.

[0028] The beneficial effects of this application compared to the prior art are as follows: This application provides a millimeter-level dynamic leveling, joint control, thermal deformation compensation, and stress dispersion control installation and fixing construction structure for large-tonnage monolithic parapet walls. Through multi-dimensional collaboration, it achieves high-precision positioning, uniform stress distribution, and reliable connection of the monolithic parapet wall, solving the technical problems of low hoisting accuracy, insufficient contact, and large joint errors in the prior art. Specifically, this can be better understood from the following aspects:

[0029] (1) High-precision positioning: By combining the total station control grid with the infrared positioning instrument, the positioning deviation is ≤ ±3mm, which meets the millimeter-level installation requirements of large-tonnage stone.

[0030] (2) Millimeter-level dynamic leveling: Initial adjustment is achieved by using four-point synchronous jacks (0.01mm / grid micro-adjustment), combined with laser level scanning, and fine adjustment is achieved by using 304 stainless steel shim set (0.1-2.0mm) to achieve a flatness of ≤0.5mm / 2m for the whole stone.

[0031] (3) Precise control of seams: The baseline closed-loop correction and hydraulic fine adjustment system work together to ensure that the seam deviation of 10m length is ≤2mm and the straightness is within 1mm, thus improving the appearance quality.

[0032] (4) Adaptive thermal deformation: elastic compensator + intelligent monitoring system, the compensation error of expansion and contraction under a temperature difference of 30℃ for a length of 10m is ≤0.1mm.

[0033] (5) Uniform stress design: The four-point synchronous leveling and pressure grouting process ensures that the contact area of ​​the bottom surface of the stone is ≥95% and the local gap is ≤0.1mm, effectively dispersing stress and eliminating the risk of hollowing.

[0034] (6) Improved construction efficiency: The adjustable design of the elongated hole in the embedded plate and the positioning steel bar, combined with nighttime temperature compensation construction (20±2℃), reduces the impact of thermal expansion and shortens the installation cycle.

[0035] It should be understood that the implementation of any embodiment of this application does not mean that it will simultaneously possess or achieve multiple or all of the above-mentioned beneficial effects. Attached Figure Description

[0036] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0037] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0038] Figure 1 An example is shown in the overall elevation view of a large-tonnage monolithic stone parapet wall;

[0039] Figure 2 An exemplary cross-sectional view of a large-tonnage solid stone parapet wall is shown.

[0040] Figure 3An exemplary diagram illustrates the installation of one set of solid stones in a large-tonnage solid stone parapet wall;

[0041] Figure 4 An exemplary schematic diagram of one set of installation and fixing construction structures for a large-tonnage solid stone parapet wall is shown.

[0042] Figure 5 An exemplary diagram illustrates a set of embedded plates in the installation and fixing construction structure of a large-tonnage solid stone parapet wall;

[0043] Figure 6 An exemplary detailed drawing of one set of installation and fixing construction structures for a large-tonnage solid stone parapet wall is shown;

[0044] Figure 7 An exemplary diagram of a disc spring is shown for the installation and fixing construction structure of a large-tonnage solid stone parapet wall;

[0045] Figure 8 A cross-sectional view of an installation and fixing construction structure for a large-tonnage solid stone parapet wall is shown as an example.

[0046] Figure 9 Example shown Figure 8 A magnified view of a portion of the image;

[0047] Figure 10 An exemplary flowchart illustrates the installation and fixing process of a large-tonnage solid stone parapet wall.

[0048] Marked in the image:

[0049] 1000 whole stones;

[0050] 100 pre-embedded foundation components, 200 positioning and locking components, 300 three-dimensional dynamic leveling system, 400 joint control system, 500 thermal deformation compensation system, and 600 stress dispersion structure.

[0051] 1. Embedded plate, 2. Anchor bar, 3. Positioning hole, 4. Grouting hole, 5. Positioning steel bar, 6. Stainless steel gasket set, 7. Bottom grouting layer, 8. Positioning hole grouting, 9. Disc spring, 10. Oblong hole, 11. Stainless steel baseline, 12. Neoprene rubber pad.

[0052] In the various figures, the same or corresponding reference numerals indicate the same or corresponding parts. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of this application are used to explain this application, but are not intended to limit this application.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] It should be understood that the terms "comprising / including," "consisting of," or any other variations are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.

[0056] It should also be understood that the terms “upper,” “lower,” “front,” “back,” “left,” “right,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device, component, or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation on this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] The following is a detailed description of the specific implementation and preferred scheme of a high-precision installation and fixing construction structure for a large-tonnage solid stone parapet wall proposed in this application.

[0059] like Figure 1 The image shows an overall schematic diagram of one of the facades of a large-tonnage stone parapet wall, which is formed by multiple large-tonnage stones of 1000 arranged in a longitudinal line. Since it is installed on an accessible sloping roof, it presents a stepped shape from top to bottom, with a total length of up to 40 meters.

[0060] For example Figure 2The large-tonnage solid stone parapet wall installed in this application uses 400mm thick granite stone, with a height of about 1500mm and a width of 700mm. The surface treatment and chamfering are shown in the figure. The stone processing precision and slab thickness are in accordance with the current national standards. The weight of a single stone is about 1.2 tons.

[0061] With a 40-meter-long stepped parapet wall and a single stone weighing 1.2 tons, and given that large stones are susceptible to temperature differences, the precision control and joint error control during installation and fixing pose significant challenges. Effective installation and fixing structures must be adopted in conjunction with appropriate construction measures to meet the precision requirements; otherwise, it will be difficult to meet the project acceptance requirements.

[0062] See also Figure 3-9 The high-precision installation and fixing construction structure for large-tonnage solid stone parapet wall provided in this application embodiment mainly includes: a pre-embedded foundation component 100, a positioning and locking component 200, a three-dimensional dynamic leveling system 300, a joint control system 400, a thermal deformation compensation system 500, and a stress dispersion structure 600. Each component and system plays its own role and works together to complete the high-precision installation and fixing of the solid stone 1000, ensuring that the installation accuracy meets the design requirements.

[0063] Combination Figure 4 , Figure 5 , Figure 9 As shown, the pre-embedded foundation component 100 includes a pre-embedded plate 1, with multiple anchor bars 2 welded to the bottom of the pre-embedded plate 1. The multiple anchor bars 2 are welded to the ground beam reinforcement bars and concrete is poured integrally after the pre-embedded plate 1 is leveled. Two elongated holes 10 are opened on the pre-embedded plate 1. In this embodiment, two elongated holes 10 are opened on the pre-embedded plate 1 along the longitudinal direction of the plate in the same straight line. Correspondingly, two positioning holes 3 are opened inside the whole stone 1000 for positioning and locking. The positioning holes 3 are vertical, at least 500mm deep, and ∅50mm in diameter. A Φ40mm grouting hole 4 is opened on the side of the stone. The grouting hole 4 is horizontal and communicates with the positioning hole 3 for grouting.

[0064] In this application, such as Figure 4 As shown, the embedded plates 1 are arranged in a stepped pattern along the longitudinal direction, with four plates forming a group to create a whole. The lower edge of the whole step bends vertically downwards. By designing the embedded plates 1 into groups of four, a Φ1mm stainless steel baseline is set along the subsequent longitudinal length, with each group of four plates forming a closed-loop correction unit.

[0065] In some embodiments, the embedded plate 1 is made of Q355B steel plate (thickness ≥10mm), with a planar dimension exceeding the projected surface of the whole stone by more than 100mm. The anchor bar 2 is 4×Φ25HRB400, and is welded to the ground beam reinforcement by double-sided welding (welding length ≥5d). An elongated hole (Φ30mm) is opened on the surface of the embedded plate 1 for inserting HRB400Φ28 positioning reinforcement bars.

[0066] In this application, such as Figure 4 , Figure 6 , Figure 9 As shown, the positioning and locking assembly 200 includes two positioning steel bars 5. The lower parts of the two positioning steel bars 5 are respectively inserted into two elongated holes 10 and welded to the embedded plate 1. The upper parts are inserted into the positioning holes 3 reserved in the whole stone 1000. The whole stone 1000 is positioned and locked by inserting the two positioning steel bars 5 into the positioning holes 3.

[0067] In some embodiments, the positioning steel bar 5 is made of HRB400Φ28 threaded steel bar, which passes through the embedded plate 1 for no less than 10cm. Rebar adhesive is added inside the structure, and it is fixed to the embedded plate 1 by bevel welding with through-hole plug welding (E5015 welding rod, current 180-220A). After welding, it is fixed by coating with epoxy zinc-rich paint (total thickness ≥180μm).

[0068] See also Figure 4 , Figure 6 , Figure 9 The three-dimensional dynamic leveling system 300 includes a four-point synchronous jack (not shown in the figure) and a stainless steel shim group 6, which are set between the bottom of the whole stone 1000 and the pre-embedded plate 1. The jacks are used for initial adjustment, and the stainless steel shim group 6 is used for fine adjustment. By combining the initial adjustment and fine adjustment, the flatness of the whole stone can be ≤0.5mm / 2m.

[0069] Figure 6 The diagram shows one of the four embedded plates 1. Two positioning steel bars 5 are installed on the plate through two elongated holes 10. A stainless steel shim is set at each of the four corners of the plate. A thermal deformation compensation system 500 is set in the middle of the four sides of the plate (details will be described later). In practice, the flatness requirements of the embedded plate 1 are met after initial and fine adjustment by using four-point synchronous jacks in combination with the stainless steel shim group 6.

[0070] Specifically, the four-point synchronous jacks in the three-dimensional dynamic leveling system have a fine adjustment accuracy of 0.01mm / division; the stainless steel shim set 6 is a 304 stainless steel shim set with specifications of 0.1mm, 0.5mm, 1.0mm, and 2.0mm.

[0071] In addition, the 3D dynamic leveling system 300 also includes a laser level scanning device. Fine-tuning is achieved using a set of 304 stainless steel shims (0.1-2.0mm), with feeler gauge checks confirming local gaps are ≤0.1mm, and UV fluorescence penetration verification confirms a contact area ≥95%, effectively dispersing stress and eliminating the risk of hollow areas.

[0072] For example Figure 4 As shown, the joint control system 400 includes a longitudinally continuous stainless steel reference line 11, with every 4 whole stones forming a closed-loop correction unit, and is equipped with a hydraulic jacking device to ensure that the straightness of the joint meets the requirements.

[0073] Specifically, the joint control system 400 includes a longitudinally continuous Φ1mm stainless steel reference line (tension 200N), with 4 whole stones forming a closed-loop correction unit. It is equipped with a 5t thrust hydraulic jacking device and a 0.01mm digital feeler gauge to control the joint width, achieving a joint straightness of ≤1mm.

[0074] See Figure 6 , Figure 7 The heat deformation compensation system 500 includes a combination compensator of disc spring 9 and neoprene pad 12 to achieve the required shrinkage compensation error under a certain length and a certain temperature difference.

[0075] Specifically, the heat deformation compensation system 500 includes a combination compensator consisting of a disc spring 9 (K=50N / mm) and a neoprene rubber pad 12 (compression rate 40%), with a compensation amount of ±0.5mm / ℃, adapting to a temperature difference of -10℃ to +40℃, and a compensation error of ≤0.1mm for the expansion and contraction amount under a temperature difference of 30℃ over a length of 10m.

[0076] For example Figure 4 , Figure 6 , Figure 8 , Figure 9 As shown, the stress dispersion structure 600 includes a bottom grout layer 7 and a positioning hole grouting layer 8, which are used to disperse structural stress.

[0077] Specifically, the bottom grouting layer 7 in the stress dispersion structure 600 is grouted with C40 non-shrink cement-based mortar (flowability ≥280mm), and the grouting thickness is controlled by a 15±2mm fixed thickness pad.

[0078] Positioning hole grouting 8 involves opening Φ50mm positioning holes (spacing ≤800mm) at the bottom of the whole stone, and then using C60 high-strength non-shrink grout for pressure grouting (pressure 0.2~0.5MPa) to ensure that the bottom surface contact area is ≥95%.

[0079] The installation and fixing construction process for large-tonnage solid stone parapet walls using the high-precision installation and fixing construction structure provided in this application is as follows: Figure 10The flowchart shown mainly includes: Step 1, installation of pre-embedded foundation components; Step 2, installation of positioning and locking components; Step 3, processing and hoisting of whole stones; Step 4, three-dimensional dynamic leveling; Step 5, joint control; Step 6, thermal deformation compensation; and Step 7, stress dispersion. By adopting the high-precision installation and fixing construction technology for large-tonnage whole stone parapet walls meticulously designed in this application, the above problems can be effectively solved, and the installation accuracy and construction efficiency can meet the requirements.

[0080] The following will continue to combine Figure 2-9 This paper elaborates on the key points of the installation and fixing construction process in the embodiments of this application.

[0081] 1. Construction Preparation

[0082] (1) Technical preparation: Organize technical personnel to refine the design drawings, prepare special construction plans, clarify the specifications of whole stones and the requirements for installation accuracy (positioning deviation ≤ ±3mm, joint straightness ≤ 1mm), and draw the layout diagram of embedded plates and the layout diagram of whole stones. Simulate the installation process through BIM modeling, predict construction difficulties and formulate countermeasures.

[0083] (2) Material preparation: Check the quality certificates of materials such as Q355B embedded steel plate, HRB400 steel bar, C40 non-shrink mortar, and C60 grouting material. Conduct sampling inspections on accessories such as 304 stainless steel gaskets (0.1-2.0mm) and disc springs (K=50N / mm) to ensure that the performance meets the design requirements.

[0084] (3) Equipment debugging: calibrate the total station, DS05 level, four-point synchronous jack (fine adjustment accuracy 0.01mm / division), etc., and check the operation status of the hydraulic jacking device (5t thrust) and digital feeler gauge (0.01mm) to ensure that the accuracy of the measurement and construction equipment meets the standards.

[0085] 2. Installation of pre-embedded foundation components ( Figure 4 , Figure 5 )

[0086] (1) Measurement and positioning: A two-level control network is set up using a total station with a point error of ≤±3mm. The edge line of the ground beam is marked and verified by a laser line marker. The elevation is verified by two people using a DS05 level to determine the center position of the embedded plate.

[0087] (2) Reinforcement binding: Double-layer bidirectional C14 threaded steel bars are laid in the ground beam, and A6@200 closed stirrups and hooks are configured. The spacing error of the main reinforcement is controlled within ±10mm, and the thickness of the protective layer is +10mm / -5mm.

[0088] (3) Installation and leveling of embedded plate: The embedded plate is made of Q355B steel plate (thickness ≥10mm), and the size exceeds the projection surface of the stone by more than 100mm. The plate is equipped with 4×Φ25HRB400 anchor bars, and the anchor bars are connected to the ground beam reinforcement by double-sided welding (welding length ≥5d).

[0089] Two Φ30mm elongated holes are made on the surface of the embedded plate. After initial leveling by hydraulic cylinder, fine adjustment is made by electronic level (accuracy 0.02mm / m) to ensure flatness ≤0.5mm / 2m and elevation difference ±1mm.

[0090] (4) Ground beam concrete pouring: C30 fine stone concrete (aggregate ≤15mm, slump 180±20mm) is used. It is poured in layers and sections (thickness ≤300mm). The vibrator is ≥100mm from the edge of the embedded plate. Laser leveling is performed before initial setting (accuracy ±3mm / 2m). Second troweling is performed before final setting. Cover with curing film and spray curing for ≥14 days to ensure that the displacement of the embedded plate is ≤3mm and the flatness of the concrete is ≤5mm / 2m.

[0091] 3. Welding of positioning reinforcing bars ( Figure 4 , Figure 6 )

[0092] (1) Positioning and fixing: Drill an elongated hole (Φ30mm) in the embedded plate, insert HRB400Φ28 positioning steel bars, pass through the embedded plate for 10cm, and fix the steel bars.

[0093] (2) Welding control: through-hole plug welding, E5015 welding rod, current 180-220A, no cracks or slag inclusions in the weld, slag removal after welding, and coating with epoxy zinc-rich paint (total thickness ≥180μm).

[0094] 4. Processing and hoisting of whole stones

[0095] (1) Stone processing: Mongolian black basalt is treated with axe-cut surface (mechanical axe depth 3-5mm, texture spacing ≤2mm), two Φ50mm positioning holes (depth 500mm) are opened at the bottom and connected through the Φ40mm grouting hole on the side, and the top beveled surface is protected with PVC corner guards.

[0096] (2) Lifting and positioning: Use nylon slings (width ≥ 200mm) with rubber pads for lifting. The sling angle is ≤ 55°. With the assistance of an infrared positioning instrument, the stone is initially positioned 3m away from the embedded plate. The hydraulic micro-motion system (speed ≤ 0.5m / min) is activated until the stone is slowly inserted into the positioning steel bar through the positioning hole.

[0097] 5. Three-dimensional dynamic leveling

[0098] Dynamic leveling process: Start four-point synchronous jacks (0.01mm / division fine adjustment), combined with laser level scanning, use 304 stainless steel shim set (0.1-2.0mm) for fine adjustment, feeler gauge to check local gap ≤0.1mm, UV fluorescence penetration verification to verify contact area ≥95%.

[0099] 6. Seam control ( Figure 4 )

[0100] Precise adjustment of joints: Tension a Φ1mm stainless steel baseline (tension 200N), with 4 stones forming a closed-loop correction unit, fine adjustment using a 5t hydraulic jacking device, and joint width controlled by a 0.01mm digital feeler gauge. Construction is carried out at night (20±2℃) to eliminate the effects of thermal expansion.

[0101] 7. Thermal deformation compensation ( Figure 6 , Figure 7 )

[0102] Elastic thermal deformation compensation: Install a combination compensator of disc spring (K=50N / mm) and neoprene rubber pad (compression rate 40%), with a compensation amount of ±0.5mm / ℃, adapting to temperature difference from -10℃ to +40℃. The compensation error of the expansion and contraction amount under a temperature difference of 30℃ for a length of 10m is ≤0.1mm.

[0103] 8. Stress dispersion ( Figure 4 , Figure 6 )

[0104] Grouting and Injection: After applying an interface agent to the bottom surface of the stone, lay C40 non-shrink cement-based mortar (flowability ≥280mm), and control the grouting thickness with 15±2mm fixed thickness pads; inject C60 high-strength grout (pressure 0.2-0.5MPa) from the Φ40mm grouting hole on the side until the grout overflows from the grouting hole to confirm compaction.

[0105] While several specific implementation details are included in the foregoing discussion, these should not be construed as limiting the scope of this application. Certain features described in the context of individual embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations.

Claims

1. A high-precision installation and fixing construction structure for a large-tonnage solid stone parapet wall, characterized in that, The large-tonnage monolithic parapet wall is formed by arranging multiple large-tonnage monoliths longitudinally in a straight line. Each monolith has two vertical positioning holes at its bottom. The installation and fixing structure mainly includes: The embedded foundation component includes an embedded plate, with multiple anchor bars welded to the bottom of the embedded plate. The multiple anchor bars are welded to the ground beam reinforcement bars, and two elongated holes are opened on the embedded plate. The positioning and locking assembly includes two positioning steel bars, the lower parts of which are respectively inserted into the two elongated holes and welded to the embedded plate, and the upper parts are inserted into the two positioning holes. The three-dimensional dynamic leveling system includes a four-point synchronous jack, a laser level, and a stainless steel shim set. The stainless steel shim set is placed between the bottom of the whole stone and the pre-embedded plate. The four-point synchronous jack is used for initial adjustment, and the stainless steel shim set is used for fine adjustment. Combined with the scanning of the laser level, the flatness of the whole stone is ≤0.5mm / 2m. The seam control system includes a longitudinally arranged stainless steel baseline, a hydraulic jacking device, and a 0.01mm digital feeler gauge to control the seam width, achieving a seam straightness of ≤1mm. The heat deformation compensation system includes a combination compensator of disc springs and neoprene pads; The stress-dispersing structure includes a bottom grouting layer and positioning hole grouting. The bottom grouting layer uses C40 non-shrink cement-based mortar for grouting, combined with C60 high-strength non-shrink grouting material for pressure grouting, to disperse structural stress.

2. The high-precision installation and fixing construction structure according to claim 1, characterized in that, Multiple large-tonnage whole stones are arranged in a stepped line along the longitudinal direction. Each whole stone has a horizontal grouting hole on its side, and the grouting hole is connected to two positioning holes.

3. The high-precision installation and fixing construction structure according to claim 2, characterized in that, The two positioning holes have a diameter of Φ50mm, and the grouting hole has a diameter of Φ40mm.

4. The high-precision installation and fixing construction structure according to claim 1, characterized in that, The embedded plates are arranged in a stepped line along the longitudinal direction, with four plates forming a whole, and the lower edge of the step bends vertically downward.

5. The high-precision installation and fixing construction structure according to claim 1, characterized in that, The embedded plate is made of Q355B steel plate with a thickness of ≥10mm. Its planar dimensions exceed the projection surface of the whole stone by more than 100mm. The anchor bars are 4×Φ25HRB400 and are welded to the ground beam steel bars by double-sided welding.

6. The high-precision installation and fixing construction structure according to claim 1, characterized in that, The positioning steel bar is fixed to the embedded plate by through-hole plug welding, and after welding, it is coated with epoxy zinc-rich paint with a total thickness of ≥180μm.

7. The high-precision installation and fixing construction structure according to claim 1, characterized in that, The four-point synchronous jack has a fine-tuning accuracy of 0.01mm / division; The stainless steel gasket set is a 304 stainless steel gasket set with specifications of 0.1mm, 0.5mm, 1.0mm, and 2.0mm.

8. The high-precision installation and fixing construction structure according to claim 1, characterized in that, The joint control system includes a longitudinally arranged Φ1mm stainless steel baseline, with every 4 whole stones forming a closed-loop correction unit. It is equipped with a 5t thrust hydraulic jacking device and a 0.01mm digital feeler gauge to control the joint width, achieving a joint straightness of ≤1mm.

9. The high-precision installation and fixing construction structure according to claim 1, characterized in that, The compensation amount of the disc spring and neoprene pad combination compensator is ±0.5mm / ℃, which is suitable for temperature differences from -10℃ to +40℃. The compensation error of the expansion and contraction amount is ≤0.1mm under a temperature difference of 30℃ over a length of 10m.

10. The high-precision installation and fixing construction structure according to any one of claims 1-9, characterized in that, The large-tonnage whole stones are made of irregularly shaped Mongolian black chopped granite or basalt, with a thickness of 400-500mm, a height of 1400-1500mm, a width of 700-800mm, and a weight of no less than 1.2 tons per stone.

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