Prefabricated enclosure wall dry connection node structure and construction method

Abstract

This invention relates to a dry-connection node structure for prefabricated walls; it includes prefabricated independent foundations, prefabricated columns, and prefabricated foundation beams on both sides; the prefabricated foundation beams are respectively arranged on both sides of the prefabricated independent foundations, and the ends of the prefabricated foundation beams are fixed to the prefabricated independent foundations through beam-seat connection components; the prefabricated columns are arranged on the upper side of the prefabricated independent foundations, and the lower part of the prefabricated columns is fixed to the prefabricated independent foundations through column-seat connection components; the prefabricated foundation beams, prefabricated independent foundations, and prefabricated columns are formed as a whole by a dry connection method. This reduces on-site formwork, rebar tying, concrete pouring, and other processes, significantly reducing on-site workload. This invention also relates to a construction method for the dry-connection node structure of prefabricated walls, including installation preparation, installation of prefabricated independent foundations, leveling of the bottom of prefabricated foundation beams, installation of prefabricated foundation beams, dry bolt connection, sealing, leveling of the bottom of prefabricated columns, installation of prefabricated columns, sealing, grouting connection of prefabricated columns, and curing.

Description

Technical Field

[0001] This invention relates to the field of prefabricated concrete wall technology, and in particular to a method for dry connection of prefabricated independent foundation bases, prefabricated foundation beams and prefabricated columns through a dual-channel dry connection of "fully threaded screws-straight threaded sleeves" and "sleeve grouting".

[0002] This invention also relates to a construction method for a dry connection node structure for assembled prefabricated walls. Background Technology

[0003] In construction engineering, walls are widely used to delineate different spatial areas and define the boundaries of a certain region. When the wall adopts a concrete structure, the columns, foundations, and foundation beams are constructed by pouring concrete on site. The process involves multiple steps such as formwork, reinforcement binding, pouring, and curing, and the overall construction period is longer than that of prefabricated assembly construction.

[0004] Patent application CN201910834065.9 discloses a combined fence structure, including a left fence structure, a middle fence structure, and a right fence structure connected together. The height of the left fence structure is the same as that of the right fence structure, while the height of the middle fence structure is higher than that of the left fence structure. Each of the left, middle, and right fence structures includes a light steel frame, a lightweight concrete wall, a fence capping, and a pre-cast sugarcane ridge. The outer side of the lightweight concrete wall is covered with a reinforced expanded metal mesh, and several pre-embedded steel bars are installed inside the lightweight concrete wall. The fence capping is installed on top of the lightweight concrete wall via a purlin, and a foundation beam is provided at the bottom of the lightweight concrete wall. The left, middle, and lower fence structures are connected together through the foundation beam. This invention ensures a sturdy and reliable overall structure, maintains an antique feel, ensures a retro effect, and provides high wall strength, ensuring sturdiness and durability. It requires minimal maintenance and has low operating costs.

[0005] However, the modular fence structure in the aforementioned patented technology cannot solve the defects of the existing technology, nor does it provide any technical inspiration for solving the existing problems. To improve construction efficiency and shorten the construction period, there is an urgent need for a dry bolt connection node and construction method for prefabricated fences to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a dry connection node structure for prefabricated walls to solve the problems mentioned in the background art.

[0007] (1) How to make the precast independent foundation, precast foundation beam and precast column form a load-bearing enclosure structure to obtain a fully dry, fully adjustable and fully corrosion-resistant enclosure node.

[0008] The purpose of this invention is to also provide a construction method for a dry connection node structure for assembled prefabricated walls.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A dry connection node structure for prefabricated walls;

[0011] Includes precast independent foundation bases, precast columns, and precast foundation beams on both sides;

[0012] Two precast foundation beams are arranged on both sides of the precast independent foundation base. The ends of the precast foundation beams are fixed to the precast independent foundation base through a beam-base connection assembly. The beam-base connection assembly includes a connecting plate, several straight threaded sleeves, several double nuts and several fully threaded screws. The connecting plate is embedded in the end face of the precast foundation beam. The connecting plate has several reserved connection holes. The reserved connection holes, the straight threaded sleeves, the double nuts and the fully threaded screws are in a one-to-one correspondence. The straight threaded sleeves are embedded in the precast independent foundation base. The threaded hole opening of the straight threaded sleeve is located on the side wall of the precast independent foundation base.

[0013] The precast columns are arranged on the upper side of the precast independent foundation. The lower part of the precast columns is fixed to the precast independent foundation through a column base connection assembly. The column base connection assembly includes several sleeve connecting steel bars and several grouting sleeves. The sleeve connecting steel bars are embedded in the precast independent foundation, and the ends of the sleeve connecting steel bars extend out of the upper end face of the precast independent foundation. The several grouting sleeves are embedded in the precast columns, and the openings of the grouting sleeves are located on the lower end face of the precast columns. The sleeve connecting steel bars and the several grouting sleeves correspond one-to-one.

[0014] When the precast foundation beam is fitted with the precast independent foundation base, one end of the fully threaded screw penetrates the connecting plate and fits with the corresponding straight threaded sleeve of the precast independent foundation base, and the other end of the fully threaded screw fits with the corresponding double nut, which abuts against the end face of the connecting plate. When the precast column is fitted with the precast independent foundation base, the sleeve connecting steel bar extends into the corresponding grouting sleeve of the precast column, filling the grouting sleeve with cement mortar. The precast foundation beam, precast independent foundation base, and precast column are formed as a whole by using a dry connection method.

[0015] Based on the above technical solution, the present invention can be further improved as follows.

[0016] Furthermore, the beam-base connection assembly also includes several first anchoring steel bars, which are pre-embedded in the precast foundation beam, and one end of the first anchoring steel bar is fixedly connected to the connecting plate.

[0017] Furthermore, the beam-base connection assembly also includes several second anchoring steel bars, which are embedded in the precast independent foundation base. Each of the several second anchoring steel bars corresponds to a certain number of first threaded sleeves, and one end of each second anchoring steel bar is fixedly connected to the corresponding threaded sleeve.

[0018] Furthermore, the precast foundation beams are pre-drilled with hand holes for the engagement of several double nuts and several fully threaded bolts.

[0019] Furthermore, the grouting sleeve is provided with a grouting port and a grouting outlet, and the two ends of the grouting port and the grouting outlet are respectively connected to the inner hole of the grouting sleeve and the side wall of the precast column, with the grouting port located below the grouting outlet.

[0020] Furthermore, a vertical adjustment joint is reserved between the precast foundation beam and the precast independent foundation seat; a horizontal adjustment joint is reserved at the bottom of the precast foundation beam.

[0021] Furthermore, an installation adjustment joint is reserved at the bottom of the precast column, and shims are used to level the bottom of the precast column and the precast independent foundation.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] (1). The present invention adopts a dry bolt connection for prefabricated walls. The dry connection method integrates the prefabricated foundation beam, prefabricated independent foundation base and prefabricated column into a whole, reducing the on-site formwork, rebar tying and concrete pouring processes, and significantly reducing the on-site workload.

[0024] (2). The present invention connects the precast foundation beam and the precast independent foundation seat into a whole by connecting the precast connecting plate and the straight thread sleeve with a screw, which is convenient to operate and improves construction efficiency.

[0025] (3). The present invention adopts a grouting sleeve connection method to form a whole between the precast column and the precast independent foundation, and reduces on-site wet work.

[0026] (4) The present invention has a 20mm concrete protective layer around the pre-embedded connecting plate to protect the connecting plate from corrosion and improve the durability of the joint.

[0027] (5). The present invention is provided with horizontal adjustment joints and vertical adjustment joints. The horizontal adjustment joints are leveled by steel shims to achieve rapid and accurate positioning.

[0028] To achieve the above objectives, the present invention also provides the following technical solution:

[0029] A construction method for assembling a prefabricated dry connection node structure as described above includes the following steps:

[0030] Step a: Installation preparation. Complete the construction of the foundation pit and cushion layer according to the design requirements. Check the concrete strength, appearance quality and dimensional deviation of the precast foundation beams, precast independent foundation bases and precast columns according to the design requirements. Check the specifications and positions of the reserved connection plates, reserved straight thread sleeves, reserved grouting sleeves and reserved sleeve connection steel bars.

[0031] Step b: Install the prefabricated independent foundation. Use a truck crane to slowly lift the prefabricated independent foundation into the pit.

[0032] Step c: Leveling the bottom of the precast foundation beam. At the placement point of the precast independent foundation, level the bottom of the precast foundation beam by leaving a 20mm horizontal gap and using shims.

[0033] Step d: Install the precast foundation beam. Slowly hoist the precast foundation beam to the installation location, align it with the control line, and lower it into place. Leave a 20mm vertical adjustment gap between the end of the precast foundation beam and the precast independent foundation base.

[0034] Step e: Select a fully threaded screw rod and pass it through the hand hole into the reserved connection hole of the connection plate at the end of the precast foundation beam. Connect it to the reserved straight threaded sleeve on the side of the precast independent foundation seat. After the fully threaded screw rod and the straight threaded sleeve are tightened, the fully threaded screw rod in the hand hole is then fixed with the washer and double nut.

[0035] Step f: After the precast independent foundation base and precast foundation beam are installed, the reserved horizontal and vertical adjustment joints are filled or grouted with 1:1 cement mortar, and the reserved handholes are also sealed with cement mortar.

[0036] Step g: On the top surface of the precast independent foundation, according to the 20mm installation adjustment joint reserved at the bottom of the precast column, level it with shims;

[0037] Step h: Use a truck crane to lift the precast column, align it with the pre-reserved sleeve connecting steel bar 12 on the upper part of the precast independent foundation, and slowly lower it to the installation position;

[0038] Step i: The 20mm installation adjustment joint reserved at the bottom of the precast column is sealed with special sealing mortar and cured for 24 hours;

[0039] Step j: Grouting connection of precast columns, grout is injected from the grouting port, and when the grout flows out of the outlet in a columnar shape, it is sealed with a rubber stopper;

[0040] Step k: Curing. After the grouting operation is completed, clean the grouting port and the surface of the component. The component can only be disturbed 24 hours after the grouting is completed and the strength of the test block under the same conditions reaches 35.0MPa. The construction is then complete.

[0041] All components and connectors used in the construction method of this prefabricated dry connection node structure can be standardized in the factory. On-site installation can be completed with only a truck crane, manual torque wrench and portable grouting pump. It is suitable for various types of prefabricated concrete walls such as residential buildings, factories, logistics parks and municipal roads, and has broad prospects for promotion and significant economic, social and environmental benefits. Attached Figure Description

[0042] Figure 1 This is a structural schematic diagram of an embodiment of the dry connection node structure of this prefabricated wall.

[0043] Figure 2 This is a cross-sectional view of a structural schematic diagram of an embodiment of the dry connection node structure of this prefabricated wall.

[0044] Figure 3 This is a top view and a cross-sectional view of an embodiment of the dry connection node structure of this prefabricated wall.

[0045] Figure 4 This is a sectional view of the left view of an embodiment of the dry connection node structure of this prefabricated wall.

[0046] Figure 5 This is a sectional view of the main view of the prefabricated foundation beam in this embodiment of the dry connection node structure of the prefabricated wall.

[0047] Figure 6 This is a sectional view of the main view of the prefabricated independent foundation in this embodiment of the dry connection node structure of the prefabricated wall.

[0048] Figure 7 This is a sectional view of the prefabricated independent foundation and prefabricated column after being combined in this embodiment of the dry connection node structure of the prefabricated wall.

[0049] Figure 8 This is a schematic diagram illustrating the principle of the construction method embodiment for the dry connection node structure of the prefabricated wall.

[0050] Explanation of the labels in the diagram:

[0051] Precast foundation beam - 100; Precast independent foundation seat - 200; Precast column - 300; Straight threaded sleeve - 410; Double nut - 420; Washer - 430; Fully threaded screw - 440; Hand hole - 110; Connecting plate - 450; Second anchoring reinforcement - 210; Grouting sleeve - 310; Sleeve connecting reinforcement - 220; Installation adjustment joint - 320; Vertical adjustment joint - 120; Horizontal adjustment joint - 130; First anchoring reinforcement - 140; Connecting hole - 451; Steel gasket - 460; Sealing mortar - 330; Grouting material - 311; Grouting port - 312; Grout outlet - 313. Detailed Implementation

[0052] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0053] The terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0055] Please refer to Figure 1 to Figure 7 As shown.

[0056] This prefabricated wall dry connection node structure includes a prefabricated independent foundation 200, a prefabricated column 300, and prefabricated foundation beams 100 on both sides.

[0057] Two precast foundation beams 100 are respectively arranged on both sides of the precast independent foundation base 200. The ends of the precast foundation beams 100 are fixed to the precast independent foundation base 200 by a beam-base connection assembly. The beam-base connection assembly includes a connecting plate 450, several straight threaded sleeves 410, several double nuts 420, several first anchoring steel bars 140, several second anchoring steel bars 210, and several fully threaded bolts 440. The connecting plate 450 is embedded in the end face of the precast foundation beam 100, and the first anchoring steel bars 140 are pre-embedded in the precast foundation beam 100. One end of the first anchoring steel bar 140 is welded and fixed to the connecting plate 450. The connecting plate 450 has several reserved connection holes 451. The reserved connection holes 451, several straight threaded sleeves 410, several double nuts 420 and several fully threaded screws 440 are in a one-to-one correspondence. The straight threaded sleeves 410 are embedded in the prefabricated independent foundation 200. The threaded hole opening of the straight threaded sleeve 410 is located on the side wall of the prefabricated independent foundation 200. The second anchoring steel bar 210 is embedded in the prefabricated independent foundation 200. Several second anchoring steel bars 210 correspond one-to-one with several straight threaded sleeves 410. One end of the second anchoring steel bar 210 is welded and fixed to the corresponding straight threaded sleeve 410.

[0058] The precast foundation beam 100 has pre-drilled handholes 110 for fitting several double nuts 420 and several fully threaded bolts 440. The dimensions of the handholes 110 are 90mm*90mm*100mm. A vertical adjustment joint 120 is provided between the precast foundation beam 100 and the precast independent foundation base 200; a horizontal adjustment joint 130 is provided at the bottom of the precast foundation beam 100.

[0059] Precast columns 300 are arranged on the upper side of precast independent foundation bases 200. The lower part of the precast columns 300 is fixed to the precast independent foundation bases 200 by a column base connecting assembly. The column base connecting assembly includes several sleeve connecting steel bars 220 and several grouting sleeves 310. The sleeve connecting steel bars 220 are embedded in the precast independent foundation bases 200, and the ends of the sleeve connecting steel bars 220 extend out of the upper end face of the precast independent foundation bases 200. The several grouting sleeves 310 are embedded in the precast columns. Within 300, the grouting sleeve 310 is pre-embedded in the precast column 300. The opening of the grouting sleeve 310 is located on the lower end face of the precast column 300. Several sleeves are connected to the reinforcing bars 220 and several grouting sleeves 310 in a one-to-one correspondence. The grouting sleeve 310 is provided with a grouting port 312 and a grouting outlet 313 respectively. The two ends of the grouting port 312 and the grouting outlet 313 are respectively connected to the inner hole of the grouting sleeve 310 and the side wall of the precast column 300. The grouting port 312 is located below the grouting outlet 313.

[0060] The bottom of the precast column 300 has a pre-reserved installation adjustment joint 320, and the bottom of the precast column 300 and the precast independent foundation 200 are leveled with shims 430.

[0061] When the precast foundation beam 100 is fitted with the precast independent foundation base 200, one end of the fully threaded screw 440 passes through the connecting plate 450 and fits with the corresponding straight threaded sleeve 410 of the precast independent foundation base 200. After tightening with the straight threaded sleeve 410, it is fixed with a steel washer 460 and a double nut 420. The other end of the fully threaded screw 440 fits with the corresponding double nut 420, and the double nut 420 abuts against the end face of the connecting plate 450. When the precast column 300 is fitted with the precast independent foundation base 200, the sleeve connecting steel bar 220 extends into the corresponding grouting sleeve 310 of the precast column 300, and the grouting sleeve 310 is filled with cement mortar. The precast foundation beam 100, the precast independent foundation base 200, and the precast column 300 are formed as a whole by a dry connection method.

[0062] Please refer to Figure 8.

[0063] The construction method for assembling the above-mentioned prefabricated dry connection node structure includes the following steps:

[0064] Step a: Installation preparation. Complete the construction of the foundation pit and cushion layer according to the design requirements. Check the concrete strength, appearance quality and dimensional deviation of the precast foundation beam 100, precast independent foundation seat 200 and precast column 300 according to the design requirements. Check the specifications and positions of the reserved connecting plate 450, reserved straight thread sleeve 410, reserved grouting sleeve 310 and reserved sleeve connecting steel bar 220.

[0065] Step b: Install the prefabricated independent foundation 200. Use a truck crane to slowly lift the prefabricated independent foundation 200 into the foundation pit, ensuring that it matches the pre-marked control line.

[0066] Step c: Level the bottom of the precast foundation beam 100. At the support point of the precast independent foundation base 200, leave a 20mm horizontal gap at the bottom of the precast foundation beam 100 and use 430 shims for leveling.

[0067] Step d: Install the precast foundation beam 100. Use a truck crane to slowly lift the precast foundation beam 100 to the installation position, align it with the control line and lower it into place. Leave a 20mm vertical adjustment gap 120 between the end of the precast foundation beam 100 and the precast independent foundation seat 200.

[0068] Step e: Select a 90mm long fully threaded screw 440, pass it through the hand hole 110 through the reserved connection hole 451 of the connecting plate 450 at the end of the precast foundation beam 100, and connect it with the reserved straight threaded sleeve 410 on the side of the precast independent foundation base 200. After the fully threaded screw 440 and the straight threaded sleeve 410 are tightened, the fully threaded screw 440 in the hand hole 110 is then fixed with the washer 430 and the double nut 420.

[0069] Step f: After the precast independent foundation base 200 and precast foundation beam 100 are installed, the reserved horizontal adjustment joint 130 and vertical adjustment joint 120 are filled or grouted with 1:1 cement mortar, and the reserved handhole 110 is also sealed with cement mortar.

[0070] Step g: On the top surface of the precast independent foundation 200, install the adjustment joint 320 with a 20mm gap at the bottom of the precast column 300, and use shims 430 to level it;

[0071] Step h: Use a truck crane to lift the precast column 300, align it with the pre-reserved sleeve connecting steel bar 22012 on the upper part of the precast independent foundation base 200, and slowly lower it to the installation position;

[0072] Step i: Install the 20mm adjustment joint 320 at the bottom of the precast column 300, seal it with special sealing mortar 330, and cure for 24 hours;

[0073] Step j: Grouting connection of precast column 300, using grouting material 311 injected from grouting port 312, and sealing with rubber stopper when the grout flows out in column from grout outlet 313;

[0074] Step k: Curing. After the grouting operation is completed, clean the grout from the grouting port 312 and the surface of the component. The component can only be disturbed 24 hours after the grouting is completed and the strength of the test block under the same conditions reaches 35.0MPa. The construction is then complete.

[0075] The above description is only one embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the principle of the present invention, and these should also be considered to fall within the protection scope of the present invention.

Claims

1. A prefabricated dry connection node structure for a perimeter wall, characterized in that: It includes a precast independent foundation (200), a precast column (300), and precast foundation beams (100) on both sides; Two precast foundation beams (100) are respectively arranged on both sides of the precast independent foundation base (200). The ends of the precast foundation beams (100) are fixed to the precast independent foundation base (200) by a beam-base connection assembly. The beam-base connection assembly includes a connecting plate (450), several straight threaded sleeves (410), several double nuts (420), and several fully threaded screws (440). The connecting plate (450) is embedded in the end face of the precast foundation beam (100). The connecting plate (450) has several reserved connecting holes (451). The reserved connecting holes (451), several straight threaded sleeves (410), several double nuts (420), and several fully threaded screws (440) are in a one-to-one correspondence. The straight threaded sleeves (410) are embedded in the precast independent foundation base (200). The opening of the threaded hole of the straight threaded sleeve (410) is located on the side wall of the precast independent foundation base (200). The precast column (300) is arranged on the upper side of the precast independent foundation (200). The lower part of the precast column (300) is fixed to the precast independent foundation (200) by a column base connection assembly. The column base connection assembly includes several sleeve connecting steel bars (220) and several grouting sleeves (310). Several sleeve connecting steel bars (220) are embedded in the precast independent foundation (200). The ends of the sleeve connecting steel bars (220) extend out of the upper end face of the precast independent foundation (200). Several grouting sleeves (310) are embedded in the precast column (300). The opening of the grouting sleeve (310) is located on the lower end face of the precast column (300). Several sleeve connecting steel bars (220) and several grouting sleeves (310) correspond one-to-one. When the precast foundation beam (100) is fitted with the precast independent foundation base (200), one end of the fully threaded screw (440) passes through the connecting plate (450) and fits with the corresponding straight threaded sleeve (410) of the precast independent foundation base (200). The other end of the fully threaded screw (440) fits with the corresponding double nut (420), and the double nut (420) abuts against the end face of the connecting plate (450). When the precast column (300) is fitted with the precast independent foundation base (200), the sleeve connecting steel bar (220) extends into the corresponding grouting sleeve (310) of the precast column (300) and fills the grouting sleeve (310) with cement mortar. The precast foundation beam (100), the precast independent foundation base (200), and the precast column (300) are formed as a whole by a dry connection method.

2. The prefabricated wall dry connection node structure according to claim 1, characterized in that: The beam-base connection assembly also includes several first anchoring steel bars (140), which are embedded in the precast foundation beam (100), and one end of the first anchoring steel bar (140) is fixedly connected to the connecting plate (450).

3. The dry connection node structure for prefabricated walls according to claim 1, characterized in that: The beam-seat connection assembly also includes several second anchoring steel bars (210), which are embedded in the precast independent foundation seat (200). Several second anchoring steel bars (210) correspond one-to-one with several first threaded sleeves (410), and one end of the second anchoring steel bar (210) is fixedly connected to the corresponding threaded sleeve (410).

4. The prefabricated wall dry connection node structure according to claim 1, characterized in that: The precast foundation beam (100) is provided with hand holes (110) for several double nuts (420) and several fully threaded screws (440).

5. The prefabricated wall dry connection node structure according to claim 1, characterized in that: The grouting sleeve (310) is provided with a grouting port (312) and a grout outlet (313). The two ends of the grouting port (312) and the grout outlet (313) are respectively connected to the inner hole of the grouting sleeve (310) and the side wall of the precast column (300). The grouting port (312) is located below the grout outlet (313).

6. The prefabricated wall dry connection node structure according to claim 1, characterized in that: A vertical adjustment joint (120) is reserved between the precast foundation beam (100) and the precast independent foundation base (200); a horizontal adjustment joint (130) is reserved at the bottom of the precast foundation beam (100).

7. The dry connection node structure for prefabricated walls according to claim 1, characterized in that: An installation adjustment joint (320) is reserved at the bottom of the precast column (300), and a shim (430) is used to level the bottom of the precast column (300) and the precast independent foundation (200).

8. A construction method for assembling a prefabricated dry connection node structure for a fence as described in any one of claims 1 to 7, comprising the following steps: Step a: Installation preparation. Complete the construction of the foundation pit and cushion layer according to the design requirements. Check the concrete strength, appearance quality and dimensional deviation of the precast foundation beam (100), precast independent foundation seat (200) and precast column (300) according to the design requirements. Check the specifications and positions of the reserved connecting plate (450), reserved straight thread sleeve (410), reserved grouting sleeve (310) and reserved sleeve connecting steel bar (220). Step b: Install the prefabricated independent foundation (200). Use a truck crane to slowly lift the prefabricated independent foundation (200) into the foundation pit. Step c: Level the bottom of the precast foundation beam (100). At the resting point of the precast independent foundation base (200), level the bottom of the precast foundation beam (100) by leaving a 20mm horizontal gap and using shims (430). Step d: Install the precast foundation beam (100). Slowly hoist the precast foundation beam (100) to the installation position, align it with the control line and lower it into place. Leave a 20mm vertical adjustment gap (120) between the end of the precast foundation beam (100) and the precast independent foundation base (200). Step e: Select a fully threaded screw (440) and pass it through the hand hole (110) through the reserved connection hole (451) of the connecting plate (450) at the end of the precast foundation beam (100) to make a threaded connection with the reserved straight threaded sleeve (410) on the side of the precast independent foundation base (200). After the fully threaded screw (440) and the straight threaded sleeve (410) are tightened, the fully threaded screw (440) in the hand hole (110) is then fixed with the washer (430) and the double nut (420). Step f: After the precast independent foundation base (200) and precast foundation beam (100) are installed, the reserved horizontal adjustment joint (130) and vertical adjustment joint (120) are filled or grouted with 1:1 cement mortar, and the reserved handhole (110) is also sealed with cement mortar. Step g: On the top surface of the precast independent foundation (200), according to the 20mm installation adjustment joint (320) reserved at the bottom of the precast column (300), use shims (430) to level it; Step h: Use a truck crane to lift the precast column (300), align it with the pre-reserved sleeve connecting steel bar (220) 12 on the upper part of the precast independent foundation base (200), and slowly lower it to the installation position; Step i: The 20mm installation adjustment joint (320) reserved at the bottom of the precast column (300) is sealed with special sealing mortar (330) and cured for 24 hours; Step j: Grouting connection of precast column (300) is carried out by injecting grout (311) from grouting port (312). When the grout flows out of the outlet (313) in a columnar shape, it is sealed with rubber plug. Step k: Curing. After the grouting operation is completed, clean the grouting port (312) and the surface of the component. The component can be disturbed 24 hours after the grouting is completed and the strength of the test block under the same conditions reaches 35.0MPa. Construction is then completed.

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