Construction method of column top automatic compensation device for steel tube concrete jacking

Abstract

The present invention discloses a construction method of a column top automatic compensation device for steel tube concrete jacking, comprising obtaining a slurry storage pipe and calculating a corresponding reference height; placing the slurry storage pipe at the column top exhaust hole, and fixing the installation of the slurry storage pipe by an L-shaped 360° rotating fixed clamp; observing whether the concrete in the column top slurry storage pipe has fallen back and taking corresponding operations; after the steel tube concrete is jacked up, pushing away the inverted L-shaped 360° rotating rod to separate it from the flanging flange, and performing finishing work. The device of the present invention is simple, easy to operate, and has low cost. After the device is installed, the jacking operation commander can stand on the ground and observe the jacking height of the steel tube concrete, effectively preventing a large amount of concrete from overflowing, polluting the surface of the steel column, and reducing material waste.

Description

Technical Field

[0001] The invention relates to the technical field of steel tube concrete jacking construction, in particular to a construction method of a column top automatic compensation device for steel tube concrete jacking. Background Art

[0002] Steel tube concrete refers to a structural member formed by filling concrete in a steel tube, and the steel tube and its core concrete can jointly bear the external load. According to different cross-sectional forms, it can be divided into circular steel tube concrete, square and rectangular steel tube concrete and polygonal steel tube concrete. The steel tube concrete jacking construction process is a concrete vibration-free construction method that uses the pumping pressure of a concrete delivery pump to pour self-compacting concrete from the bottom of the steel column until the entire steel column is filled. In recent years, with the continuous acceleration of my country's urbanization process and the continuous improvement of its international status, various large-scale international conferences and business exchange activities have landed in my country, and super-large buildings have emerged in various regions across the country. Various regions have built international conference centers, international exhibition centers, international sports centers, etc. that are in line with local strategic plans, which are of great significance to the overall improvement of urban quality.

[0003] In the jacking construction process of steel tube concrete, pressure relief devices such as exhaust and overflow holes are set at the top of the steel column. This is an important device to ensure the implementation of the entire jacking process. When the concrete in the steel tube column is jacked up, the air is discharged as the concrete rises. If the exhaust volume is not proportional to the concrete feed volume, the feed volume is greater than the air exhaust volume, which will cause increased resistance. Therefore, the exhaust volume at the top of the steel tube must be greater than the concrete feed volume, and the aperture of the exhaust hole at the top of the steel column must be greater than the aperture of the feed hole at the bottom of the steel column.

[0004] In the steel tube concrete jacking construction process, the current traditional construction process is to set exhaust holes and overflow holes at the top of the steel column or use the exhaust holes as overflow holes. The main problems are: first, when the concrete is full, cement slurry will flow out of the exhaust holes or overflow holes to pollute the steel structure over a large area, which is very cumbersome and costly to clean up. If the steel column is sprayed with fire retardant coating, it will also affect the construction quality of the fire retardant coating. Second, the time difference between closing the stop valve and judging whether the steel column is fully filled during the jacking operation will cause three consequences: ① The steel column is not fully filled at once, and the top concrete of the column needs to be poured manually; ② A large amount of self-compacting concrete flows out from the exhaust hole or overflow hole, resulting in material waste and the outflowing part needs to be chiseled, which has a high construction cost; ③ During the jacking process, there are multiple partitions inside the steel column. When the exhaust hole or overflow hole seems to be fully filled, there may be air and water accumulation inside the concrete, which may cause quality hazards such as internal voids in the concrete; second, as time goes by, the accumulated air and water inside are slowly discharged, which will cause a certain distance between the jacking completion surface inside the steel column and the top of the steel column. Third, whether the jacking is in place and whether the concrete at the top of the column has fallen back and sunk cannot be visualized standing on the ground. Construction workers need to stand on the top of the column to observe, which is labor-intensive and time-consuming, and there are certain safety hazards. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to provide a construction method for an automatic column top compensation device for steel tube concrete jacking, so as to solve the problem that the steel tube concrete is not jacked into place at one time in the conventional construction process and needs to be manually poured a second time. If the compensation device falls back and sinks, the concrete in the slurry storage pipe can automatically fall back into the steel column; the waste of concrete can be reduced and the problem of steel column pollution in the traditional process can be overcome; the slurry storage pipe made of acrylic material can solve the problem of visualization of whether the steel column is fully filled, thereby reducing the risk factor of the construction operation; at the same time, through the analysis of factors such as the fall value and the diameter of the steel column, materials can be effectively saved, construction costs can be reduced, and construction quality and efficiency can be improved.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An automatic compensation device for the top of a column used for steel tube concrete jacking comprises a transparent slurry storage pipe, the inner diameter of the slurry storage pipe is equal to the diameter of the exhaust hole at the top of the column, and the center line of the slurry storage pipe coincides with the center line of the exhaust hole, a demoulding layer is arranged on the inner wall of the slurry storage pipe, a flanging flange is arranged at the bottom of the slurry storage pipe, a groove is processed on the flanging flange, a sealing ring is filled in the groove, and the flanging flange is fixed on the top of the column by a plurality of locking devices evenly distributed on the top of the column.

[0008] The slurry storage pipe is made of acrylic.

[0009] The demoulding layer is made of a smeared demoulding agent.

[0010] The slurry storage pipe is provided with scale values.

[0011] An eye-catching identification belt is arranged on the outer wall of the slurry storage pipe.

[0012] The locking device adopts an L-shaped 360° rotating fixed clamp, which includes a base and an L-shaped 360° rotating rod. The base is evenly fixed around the exhaust hole, one end of the L-shaped 360° rotating rod is rotatably installed on the base, and the other end of the L-shaped 360° rotating rod is rotated and buckled on the flange to limit the flange from detaching from the top of the column.

[0013] The sealing ring protrudes from the surface of the flange by 5-8 mm.

[0014] The construction method using the automatic column top compensation device for steel tube concrete jacking comprises the following steps:

[0015] Step 1: Obtain a slurry storage pipe with a wall thickness of 5-8mm and a diameter that is the same as the diameter of the exhaust hole, made of acrylic material and having a flanged flange with scales, apply a release agent inside the slurry storage pipe, install a sealing ring in the groove at the bottom of the flanged flange, and calculate the corresponding reference height of the slurry storage pipe according to the natural sinking amount of concrete;

[0016] Step 2: Paste a striking identification tape on the outer wall of the slurry storage pipe at the corresponding reference height, and place the slurry storage pipe at the exhaust hole on the top of the column so that the exhaust hole and the center line of the slurry storage pipe coincide. Evenly distribute the L-shaped 360° rotating fixed clamps around the exhaust hole and weld the base to the top of the column. Press the slurry storage pipe hard and rotate the L-shaped 360° rotating rod to press it on the top of the flange flange to install and fix the slurry storage pipe. Check the sealing performance of the slurry storage pipe.

[0017] Step 3: When the steel tube concrete is lifted above the column top and enters the slurry storage pipe to reach the marking zone, close the stop valve on the ground. 30 minutes after closing the stop valve, stand on the ground to observe whether the concrete in the slurry storage pipe on the column top has fallen back and the value of the fall back;

[0018] Step 4: Observe the first 5-10 steel columns. If there is no fallback of concrete in the slurry storage pipe at the top of the column, adjust the marking tape to the scale of 5-10 cm on the slurry storage pipe. If there is fallback of concrete in the slurry storage pipe at the top of the column, observe the fallback value, conduct statistical analysis, find out the fallback average value under the same pipe diameter, and then adjust the marking tape to the scale where the height upward from the bottom of the slurry storage pipe is equal to the fallback average value;

[0019] Step 5: After the jacking of the steel tube concrete is completed and the concrete has initially set, push open the inverted L-shaped 360° rotating rod to separate it from the flanging flange, pull out the slurry storage pipe, cut the base, clean the slurry storage pipe, and at the same time remove and clean the small concrete platform remaining after pulling out the slurry storage pipe, and repair the exhaust hole steel plate.

[0020] The beneficial effects of the present invention are:

[0021] 1. The device is simple, easy to operate and low cost.

[0022] 2. After the device is installed, the jacking operation commander can stand on the ground and observe the jacking height of the steel tube concrete, which can effectively prevent a large amount of concrete from overflowing, polluting the surface of the steel column and reducing material waste.

[0023] 3. This construction device and method can solve the problem in traditional construction technology that the steel tube concrete is not lifted into place in one time and needs manual secondary pouring, or the problem that due to air and water accumulation, there is a certain distance between the finished surface of the lifted concrete inside the steel column and the top of the steel column, which requires secondary pouring.

[0024] 4. Through this device, the chiseling and cleaning work of concrete overflowing from the exhaust hole can be effectively controlled, reducing the work intensity and risk factor of workers.

[0025] 5. Analyzing factors such as the fall value and the diameter of the steel column can effectively save materials. If the volume is large, it will produce obvious economic benefits. At the same time, it will reduce construction costs and improve construction quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall installation of the present invention.

[0027] Figure 2 For the present invention Figure 1 Schematic diagram of the AA direction.

[0028] Figure 3 It is a schematic diagram of the structure of the slurry storage pipe in the present invention.

[0029] Figure 4 It is a structural schematic diagram of the L-shaped 360° rotating fixed clamping table in the present invention.

[0030] Graphic markings: 1. Slurry storage pipe, 101. Flanged flange, 2. Identification tape, 3. Sealing ring, 4. L-shaped 360° rotating fixed clamping table, 401. Base, 402. L-shaped 360° rotating rod, 5. Exhaust hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] An automatic column top compensation device for steel tube concrete jacking includes a transparent slurry storage pipe 1, a scale value is set on the slurry storage pipe 1, and a striking identification tape 2 is set on the outer wall of the slurry storage pipe. The identification tape 2 can be a conspicuous colored tape. Drawing on previous jacking construction experience, the corresponding scale of the slurry storage pipe 1 is calculated according to the natural sinking and falling amount of concrete, and the striking identification tape 2 is pasted on the corresponding scale outside the slurry storage pipe 1. The slurry storage pipe is made of acrylic, usually with a wall thickness of 5-10mm. The specially treated acrylic is made of organic glass. The inner diameter of the slurry storage pipe 1 is equal to the aperture of the exhaust hole 5 at the top of the column, and the center line of the slurry storage pipe 1 coincides with the center line of the exhaust hole 5. A release agent is applied to the inner wall of the slurry storage pipe 1 to form a release layer. A flanging flange 101 is provided at the bottom of the slurry storage pipe. A groove is processed on the flanging flange, and a sealing ring 3 is filled in the groove. The sealing ring 3 protrudes from the surface of the flanging flange 101 by 5-8 mm. The flanging flange 101 is fixed to the top of the column by a number of locking devices evenly distributed on the top of the column.

[0033] The locking device adopts four L-shaped 360° rotating fixed clamps 4, which include a base 401 and an L-shaped 360° rotating rod 402. The four bases 401 are evenly fixed on the column top steel plates around the exhaust hole. One end of each L-shaped 360° rotating rod 402 is rotatably installed on the base 401, and the other end of the L-shaped 360° rotating rod 402 is rotated and fastened to the flange flange 101 to limit the flange flange from being separated from the column top.

[0034] The construction method using the automatic column top compensation device for steel tube concrete jacking comprises the following steps:

[0035] Step 1: Obtain a slurry storage pipe 1 with a flanged flange and scale made of acrylic material and a wall thickness of 5-8mm and the same diameter as the exhaust hole. Apply a release agent inside the slurry storage pipe 1, and install a sealing ring 3 in the bottom groove of the flanged flange to prevent leakage when jacking to the interface. Calculate the corresponding reference height of the slurry storage pipe according to the natural sinking and falling amount of concrete. The height of the slurry storage pipe is composed of two parts. One is to draw on the previous jacking construction experience and calculate the corresponding reference height of the slurry storage pipe 1 according to the natural sinking and falling amount of concrete; the other is to increase the height of 0.5-1m on the basis of the reference height to store the floating slurry on the upper part when jacking concrete;

[0036] Step 2: Paste a striking identification tape 2 on the outer wall of the slurry storage pipe 1 at the corresponding reference height, which is convenient for visual operation and provides data support for subsequent research on factors such as the amount of concrete sinking and the diameter of the steel column. Place the slurry storage pipe at the exhaust hole on the top of the column so that the exhaust hole and the center line of the slurry storage pipe coincide. Evenly distribute the L-shaped 360° rotating fixed clamping platform 4 around the exhaust hole and weld the base 401 to the steel plate on the top of the column. Press the slurry storage pipe hard and rotate the L-shaped 360° rotating rod 402 to press it on the top of the flanging flange 101 to achieve installation and fixation of the slurry storage pipe and check the sealing performance of the slurry storage pipe.

[0037] Step 3: When the steel tube concrete is lifted above the column top and enters the slurry storage pipe 1 to reach the mark 2, close the stop valve on the ground. 30 minutes after closing the stop valve, stand on the ground to observe whether the concrete in the slurry storage pipe on the column top has fallen back and the value of the fall back;

[0038] Step 4: Through the observation of the first 5-10 steel columns, if there is no fallback of concrete in the slurry storage pipe at the top of the column, adjust the marking tape 2 to the scale of 5-10cm of the slurry storage pipe, which will save materials and improve the construction quality. If there is fallback of concrete in the slurry storage pipe at the top of the column, observe the fallback value, conduct statistical analysis, find out the fallback average value under the same pipe diameter, and then adjust the marking tape 2 to the scale position where the height upward from the bottom of the slurry storage pipe is equal to the fallback average value, so as to obtain the best economic and quality benefits;

[0039] Step 5: After the jacking of the steel tube concrete is completed and the concrete has initially set, push open the inverted L-shaped 360° rotating rod 402 to separate it from the flanging flange 101, pull out the slurry storage pipe 1, cut the base, clean the slurry storage pipe, and at the same time remove and clean the small concrete platform remaining after pulling out the slurry storage pipe, and repair the exhaust hole 5 steel plate.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction method of a column top automatic compensation device for steel tube concrete jacking, the method uses an automatic column top compensation device for steel tube concrete jacking, the column top automatic compensation device for steel tube concrete jacking comprises a transparent slurry storage pipe, the inner diameter of the slurry storage pipe is equal to the diameter of the column top exhaust hole, and the center line of the slurry storage pipe coincides with the center line of the exhaust hole, a demoulding layer is arranged on the inner wall of the slurry storage pipe, a flanged flange is arranged at the bottom of the slurry storage pipe, a card groove is processed on the flanged flange, a sealing ring is filled in the card groove, and the flanged flange is fixed on the column top by a plurality of locking devices evenly distributed on the column top; The locking device adopts an L-shaped 360° rotating fixed clamping platform, which includes a base and an L-shaped 360° rotating rod. The base is evenly fixed around the exhaust hole, one end of the L-shaped 360° rotating rod is rotated and installed on the base, and the other end of the L-shaped 360° rotating rod is rotated and buckled on the flange to limit the flange from being separated from the top of the column; The construction method of the column top automatic compensation device for steel tube concrete jacking is characterized in that: The steps include: Step 1: Obtain a slurry storage pipe with a wall thickness of 5-8mm and a diameter that is the same as the diameter of the exhaust hole, made of acrylic material and having a flanged flange with scales, apply a release agent inside the slurry storage pipe, install a sealing ring in the groove at the bottom of the flanged flange, and calculate the corresponding reference height of the slurry storage pipe according to the natural sinking amount of concrete; Step 2: Paste a striking identification tape on the outer wall of the slurry storage pipe at the corresponding reference height, and place the slurry storage pipe at the exhaust hole on the top of the column so that the exhaust hole and the center line of the slurry storage pipe coincide. Evenly distribute the L-shaped 360° rotating fixed clamps around the exhaust hole and weld the base to the top of the column. Press the slurry storage pipe hard and rotate the L-shaped 360° rotating rod to press it on the top of the flange flange to install and fix the slurry storage pipe. Check the sealing performance of the slurry storage pipe. Step 3: When the steel tube concrete is lifted above the column top and enters the slurry storage pipe to reach the marking zone, close the stop valve on the ground. 30 minutes after closing the stop valve, stand on the ground to observe whether the concrete in the slurry storage pipe on the column top has fallen back and the value of the fall back; Step 4: Observe the first 5-10 steel columns. If there is no fallback of concrete in the slurry storage pipe at the top of the column, adjust the marking tape to the scale of 5-10 cm on the slurry storage pipe. If there is fallback of concrete in the slurry storage pipe at the top of the column, observe the fallback value, conduct statistical analysis, find out the fallback average value under the same pipe diameter, and then adjust the marking tape to the scale where the height upward from the bottom of the slurry storage pipe is equal to the fallback average value; Step 5: After the jacking of the steel tube concrete is completed and the concrete has initially set, push open the inverted L-shaped 360° rotating rod to separate it from the flanging flange, pull out the slurry storage pipe, cut the base, clean the slurry storage pipe, and at the same time remove and clean the small concrete platform remaining after pulling out the slurry storage pipe, and repair the exhaust hole steel plate.

2. The construction method of the column top automatic compensation device for steel tube concrete jacking according to claim 1 is characterized by: The slurry storage pipe is made of acrylic.

3. The construction method of the automatic column top compensation device for steel tube concrete jacking according to claim 1 is characterized in that: The demoulding layer is made of a smeared demoulding agent.

4. The construction method of the automatic column top compensation device for steel tube concrete jacking according to claim 1 is characterized by: The slurry storage pipe is provided with scale values.

5. The construction method of the automatic column top compensation device for steel tube concrete jacking according to claim 1 is characterized by: The outer wall of the slurry storage pipe is provided with a striking identification belt.

6. The construction method of the automatic column top compensation device for steel tube concrete jacking according to claim 1 is characterized by: The sealing ring protrudes from the surface of the flange by 5-8 mm.

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