A method and structure for continuous pouring of bottom-sealed steel pipe column and anti-pulling pile concrete

Abstract

A method and structure for continuous concrete pouring of a bottom-sealed steel pipe column and an anti-pulling pile, wherein an extension pipe with a one-way plugging plate is arranged at the bottom of the bottom-sealed steel pipe column, and the bottom-sealed steel pipe column is inserted into a designated position by using an HEP ​​insertion device and a tool pipe, and water is simultaneously poured into the steel pipe column during the insertion process, and then a concrete conduit in the steel pipe column is installed, and the concrete conduit is docked with the extension pipe, and then concrete is poured, and the anti-pulling pile and the steel pipe column are poured through the concrete conduit and the extension pipe, and the pouring process uses the HPE insertion device to lift the steel pipe column or the concrete conduit to the designed position, and remove the redundant tools and the redundant concrete conduit, and repeat the pouring and removal steps until the pouring is completed. The present invention has the characteristics of simple structure, safety, reliability, and easy operation, and can meet the requirements of continuous concrete pouring of bottom-sealed steel pipe columns and anti-pulling piles, and improve construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a method and structure for continuously pouring concrete of bottom-sealed steel pipe columns and pull-out piles of a subway station. Background Art

[0002] In subway station projects, in some cases, steel pipe columns are used for the main structural columns of the station, and the steel pipe columns are also used as temporary columns. For example, Mawu Station of the Phase II Project of Guangzhou Metro Line 14 is a semi-covered and excavated station. The cover plate is used as a traffic relief cover plate, and the steel pipe columns are used as temporary columns for the traffic relief cover plate. Some steel pipe columns are used as replacement piles for the pile foundation of the Huangshi Interchange ramp bridge in the foundation pit. Pull-out piles are set at the bottom of the main structure of Mawu Station. The pull-out piles and steel pipe columns are constructed simultaneously during the construction of the station enclosure structure. The steel pipe columns are convex bottom-sealed.

[0003] When constructing pull-out piles and steel pipe columns, it is necessary to complete the pouring of pull-out pile concrete, then use HPE equipment to insert the steel pipe column into the pull-out pile concrete, and finally pour the concrete inside the steel pipe column. This construction method requires increasing the final setting time of the pull-out pile concrete, that is, it is necessary to use super-concrete to pour the pull-out pile concrete. However, the mixing test time of super-slow-setting concrete is long, and it is difficult to ensure the quality of super-concrete. When the super-slow-setting time does not meet the requirements, it is difficult to insert the steel pipe column, and it is difficult to ensure the insertion of the steel pipe column. If an unsealed steel pipe column is used to pour the pull-out pile at the same time, mud will flow into the steel pipe column, and the inner wall will adhere to the mud, and the concrete pouring will not meet the design requirements. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method and structure for continuous pouring of concrete of bottom-sealed steel pipe columns and pull-out piles, which has the characteristics of simple structure, safety, reliability and easy operation, can meet the requirements of continuous pouring of concrete of bottom-sealed steel pipe columns and pull-out piles, and improve construction efficiency.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A method for continuous pouring of bottom-sealed steel pipe columns and anti-pull pile concrete is provided, comprising the following steps:

[0007] 1) After the pile hole is accepted and the anti-pullout pile reinforcement cage is hoisted, the HPE insertion equipment is installed and debugged in place according to the designed pile hole center;

[0008] 2) The bottom-sealed steel pipe column is hoisted into the pile hole in sections and spliced ​​in the HPE insertion equipment, and a tool pipe is installed on the top of the bottom-sealed steel pipe column, wherein an extension pipe connected to the bottom-sealed steel pipe column is provided at the bottom of the bottom-sealed steel pipe column, and an openable one-way plugging plate is provided at the bottom end of the extension pipe;

[0009] 3) Using the HPE insertion equipment and tool pipe, insert the bottom-sealed steel pipe column with the extension pipe into the pile hole, extend the tool pipe according to the insertion depth, and inject clean water into the bottom-sealed steel pipe column at the same time. Use the mud pressure in the pile hole to press the openable one-way plug at the bottom of the extension pipe to prevent mud from flowing into the bottom-sealed steel pipe column until the bottom of the extension pipe is inserted close to the bottom of the hole;

[0010] 4) When the extension pipe is inserted into place, install the concrete conduit in the bottom-sealed steel pipe column, and align the bottom end of the concrete conduit with the top connecting port of the extension pipe;

[0011] 5) After the concrete conduit is installed, install the water-blocking ball and start pouring underwater concrete outside the pipe. Use the gravity of the concrete to push the one-way plug outwards with the water-blocking ball, discharge the water-blocking ball, and pour concrete for the first time to ensure that the extension pipe is buried in the concrete for no less than 1.0m;

[0012] 6) Start pouring underwater concrete outside the continuous pipe. During the pouring process, when the extension pipe is buried too deep in the concrete, stop pouring concrete, use the HPE insertion equipment to lift the bottom-sealed steel pipe column through the tool pipe, and ensure that the extension pipe is buried in the concrete for no less than 1.0m. Then remove the lifted excess tool pipe and excess concrete conduit;

[0013] 7) After the removal of the redundant tool pipes and redundant concrete conduits, continue pouring underwater concrete outside the pipe, repeat step 6) until the concrete is poured to 0.5 to 1.0 m above the top of the pull-out pile, stop pouring underwater concrete outside the pipe, and then pour underwater concrete inside the bottom-sealed steel pipe column through the concrete conduit;

[0014] 8) During the underwater concrete pouring process in the pipe, when the extension pipe is buried too deep in the concrete, stop pouring the concrete and lift the concrete pipe. While lifting it, ensure that the extension pipe is buried in the concrete for no less than 1.0m, and then remove the excess concrete pipe;

[0015] 9) After the removal of the redundant concrete pipes, continue pouring underwater concrete in the pipes, repeat step 8) until the underwater concrete in the pipes is poured to 0.5 to 1.0 m above the design elevation, lift the remaining concrete pipes, and complete the underwater concrete pouring.

[0016] As a further improvement of the method, the extension pipe is made of galvanized steel pipe, the length of the extension pipe is determined according to the depth of the pull-out pile, a circular interface is provided at the bottom of the bottom-sealed steel pipe column, and the extension pipe is welded to the circular interface at the bottom of the bottom-sealed steel pipe column to achieve connectivity between the two.

[0017] As a further improvement of the method, in step 3), when injecting clean water into the bottom-sealed steel pipe column, the water level needs to be kept 1.0 to 2.0 m lower than the mud liquid level in the pile hole; the extension pipe needs to be inserted until its bottom is 0.3 to 0.5 m away from the bottom of the hole.

[0018] As a further improvement of the method, in step 6) and step 8), the excessive depth refers to when the concrete conduit is buried 5.0 to 7.0 m into the concrete.

[0019] As a further improvement of the method, in step 7), before pouring underwater concrete in the pipe, it is necessary to lift the concrete conduit in the bottom-sealed steel pipe column to a distance of 0.2 to 0.4 m from the inner bottom of the bottom-sealed steel pipe column before the concrete begins to set.

[0020] The present invention also provides a bottom-sealed steel pipe column and pull-out pile concrete continuous casting structure, comprising a pile hole, an HPE insertion device, a tool pipe, a bottom-sealed steel pipe column, an extension pipe and a concrete conduit, wherein the bottom of the bottom-sealed steel pipe column is connected to the top of the extension pipe, and the bottom end of the extension pipe is provided with an openable one-way plugging plate, the HPE insertion device is installed at the top of the pile hole, and the tool pipe is installed at the top of the bottom-sealed steel pipe column. The bottom-sealed steel pipe column and the extension pipe are inserted into the pile hole through the cooperation of the HPE insertion device and the tool pipe, and the concrete conduit is inserted into the bottom-sealed steel pipe column and is aligned and tightly fitted with the top connecting port of the extension pipe.

[0021] As a further improvement of the structure, a circular interface is provided at the bottom of the bottom-sealed steel pipe column, and the top end of the extension pipe is welded to the circular interface at the bottom of the bottom-sealed steel pipe column to achieve communication between the two.

[0022] As a further improvement of the structure, the bottom end of the extension pipe is 0.3 to 0.5 m away from the bottom of the pile hole.

[0023] As a further improvement of the structure, a water-isolating ball is arranged in the extension tube.

[0024] As a further improvement of the structure, the extension pipe is made of galvanized steel pipe.

[0025] The beneficial effects of the present invention are as follows: compared with the conventional method of first pouring the pull-out pile concrete, then inserting the bottom-sealed steel pipe column and then pouring the concrete in the steel pipe column, the method and structure of the present invention do not need to configure super-slow-setting concrete, and do not need to increase the final setting time of the pull-out pile concrete. By providing an extension pipe and a one-way plugging plate at the bottom of the extension pipe, mud can be prevented from entering the steel pipe column and polluting the inner wall of the steel pipe column, so that the bottom-sealed steel pipe column and the pull-out pile can be continuously poured together, and there is no need to wait for the pull-out pile concrete to be poured before inserting the bottom-sealed steel pipe column, thereby greatly improving the construction efficiency and having the characteristics of simple structure, safety, reliability and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Marking instructions: 1-pile hole, 2-HPE insertion equipment, 3-tool pipe, 4-bottom-sealed steel pipe column, 5-extension pipe, 51-one-way plugging plate, 6-concrete conduit. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] like Figure 1 As shown, a bottom-sealed steel pipe column 4 and a continuous casting structure of pull-out pile concrete include a pull-out pile hole 1, an HPE insertion device 2, a tool pipe 3, a bottom-sealed steel pipe column 4, an extension pipe 5 and a concrete conduit 6. A circular interface is provided at the bottom of the bottom-sealed steel pipe column 4, which is welded to the top of the extension pipe 5 through the circular interface, so that the bottom-sealed steel pipe column 4 and the extension pipe 5 are connected. The extension pipe 5 is a galvanized steel pipe, and an openable one-way plugging plate 51 is provided at the bottom of the extension pipe 5. The HPE insertion device 2 is installed at the top of the pile hole 1, and the tool pipe 3 is installed at the top of the bottom-sealed steel pipe column 4. The bottom-sealed steel pipe column 4 and the extension pipe 5 are inserted into the pile hole 1 through the cooperation of the HPE insertion device 2 and the tool pipe 3, and the insertion depth is 0.3 to 0.5 m from the bottom end of the extension pipe 5 to the bottom of the pile hole 1. A water-blocking ball (not shown in the figure) is provided in the extension pipe 5. The concrete conduit 6 is inserted into the bottom-sealed steel pipe column 4 and aligned and closely attached to the top connecting opening of the extension pipe 5 .

[0030] The above structure adopts the following construction methods:

[0031] 1) After the pile hole 1 is accepted and the anti-pullout pile reinforcement cage is hoisted, the HPE insertion equipment 2 is installed and debugged in place according to the designed center of the pile hole 1;

[0032] 2) The bottom-sealed steel pipe column 4 is hoisted into the pile hole 1 in sections and spliced ​​in the HPE insertion device 2, and the tool pipe 3 is installed on the top of the bottom-sealed steel pipe column 4, wherein an extension pipe 5 connected to the bottom-sealed steel pipe column 4 is provided at the bottom of the bottom-sealed steel pipe column 4, and an openable one-way plugging plate 51 is provided at the bottom end of the extension pipe 5. The extension pipe 5 is made of galvanized steel pipe, and the length of the extension pipe 5 is determined according to the depth of the pull-out pile. A circular interface is provided at the bottom of the bottom-sealed steel pipe column 4, and the extension pipe 5 is welded to the circular interface at the bottom of the bottom-sealed steel pipe column 4 to achieve the connection between the two.

[0033] 3) Using the HPE insertion device 2 and the tool pipe 3, insert the bottom-sealed steel pipe column 4 with the extension pipe 5 into the pile hole 1, extend the tool pipe 3 according to the insertion depth, and inject clean water into the bottom-sealed steel pipe column 4 at the same time, keep the water level 1.0-2.0m lower than the mud level in the pile hole 1, and use the mud pressure in the pile hole 1 to press the openable one-way plugging plate 51 at the bottom of the extension pipe 5 to prevent the mud from flowing into the bottom-sealed steel pipe column 4, until the bottom of the inserted extension pipe 5 is 0.3-0.5m away from the bottom of the hole;

[0034] 4) When the extension pipe 5 is inserted into place, the concrete conduit 6 is installed in the bottom-sealed steel pipe column 4, and the bottom end of the concrete conduit 6 is aligned and closely attached to the top connecting opening of the extension pipe 5;

[0035] 5) After the concrete conduit 6 is installed, the water-blocking ball is installed and the underwater concrete outside the pipe is poured. The water-blocking ball is used to push the one-way plugging plate 51 outward by the concrete gravity, and the water-blocking ball is discharged. The first concrete pouring ensures that the extension pipe 5 is buried in the concrete for not less than 1.0m;

[0036] 6) Start pouring underwater concrete outside the continuous pipe. During the pouring process, when the extension pipe 5 is buried in the concrete for 5.0 to 7.0 m, stop pouring concrete, and use the HPE insertion device 2 to lift the bottom-sealed steel pipe column 4 through the tool pipe 3. While lifting, ensure that the extension pipe 5 is buried in the concrete for no less than 1.0 m, and then remove the lifted excess tool pipe 3 and excess concrete guide pipe 6;

[0037] 7) After the redundant tool pipe 3 and the redundant concrete conduit 6 are removed, continue pouring underwater concrete outside the pipe, repeat step 6) until the concrete is poured to 0.5-1.0m above the top of the pull-out pile, stop pouring underwater concrete outside the pipe, lift the concrete conduit 6 in the bottom-sealed steel pipe column 4 to 0.2-0.4m from the inner bottom of the bottom-sealed steel pipe column 4 before the concrete begins to set, and then pour underwater concrete in the bottom-sealed steel pipe column 4 through the concrete conduit 6;

[0038] 8) During the underwater concrete pouring process in the pipe, when the extension pipe 5 is buried in the concrete for 5.0 to 7.0 m, the concrete pouring is stopped and the concrete conduit 6 is lifted up. When lifting up, it is necessary to ensure that the extension pipe 5 is buried in the concrete for not less than 1.0 m, and then the lifted excess concrete conduit 6 is removed;

[0039] 9) After the removal of the redundant concrete conduit 6, continue pouring underwater concrete in the pipe, repeat step 8) until the underwater concrete in the pipe is poured to 0.5 to 1.0 m above the design elevation, lift the remaining concrete conduit 6, and complete the underwater concrete pouring.

[0040] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention in any form. Any person with ordinary knowledge in the technical field may make partial changes or modifications to the technical contents disclosed in the present invention without departing from the scope of the technical features of the present invention, and the equivalent embodiments without departing from the technical features of the present invention are still within the scope of the technical features of the present invention.

Claims

1. A method for continuous pouring of bottom-sealed steel pipe columns and anti-pulling pile concrete, characterized in that The following steps are involved: 1) After the pile hole is accepted and the anti-pullout pile reinforcement cage is hoisted, the HPE insertion equipment is installed and debugged in place according to the designed pile hole center; 2) The bottom-sealed steel pipe column is hoisted into the pile hole in sections and spliced ​​in the HPE insertion equipment, and a tool pipe is installed on the top of the bottom-sealed steel pipe column, wherein an extension pipe connected to the bottom-sealed steel pipe column is provided at the bottom of the bottom-sealed steel pipe column, and an openable one-way plugging plate is provided at the bottom end of the extension pipe; 3) Using the HPE insertion equipment and tool pipe, insert the bottom-sealed steel pipe column with the extension pipe into the pile hole, extend the tool pipe according to the insertion depth, and inject clean water into the bottom-sealed steel pipe column at the same time. Use the mud pressure in the pile hole to press the openable one-way plug at the bottom of the extension pipe to prevent mud from flowing into the bottom-sealed steel pipe column until the bottom of the extension pipe is inserted close to the bottom of the hole; 4) When the extension pipe is inserted into place, install the concrete conduit in the bottom-sealed steel pipe column, and align the bottom end of the concrete conduit with the top connecting port of the extension pipe; 5) After the concrete conduit is installed, install the water-blocking ball and start pouring underwater concrete outside the pipe. Use the gravity of the concrete to push the one-way plug outwards with the water-blocking ball, discharge the water-blocking ball, and pour concrete for the first time to ensure that the extension pipe is buried in the concrete for no less than 1.0m; 6) Start pouring underwater concrete outside the continuous pipe. During the pouring process, when the extension pipe is buried too deep in the concrete, stop pouring concrete, use the HPE insertion equipment to lift the bottom-sealed steel pipe column through the tool pipe, and ensure that the extension pipe is buried in the concrete for no less than 1.0m. Then remove the lifted excess tool pipe and excess concrete conduit; 7) After the removal of the redundant tool pipes and redundant concrete conduits, continue pouring underwater concrete outside the pipe, repeat step 6) until the concrete is poured to 0.5 to 1.0 m above the top of the pull-out pile, stop pouring underwater concrete outside the pipe, and then pour underwater concrete inside the bottom-sealed steel pipe column through the concrete conduit; 8) During the underwater concrete pouring process in the pipe, when the extension pipe is buried too deep in the concrete, stop pouring the concrete and lift the concrete pipe. While lifting it, ensure that the extension pipe is buried in the concrete for no less than 1.0m, and then remove the excess concrete pipe; 9) After the removal of the redundant concrete pipes, continue pouring underwater concrete in the pipes, repeat step 8) until the underwater concrete in the pipes is poured to 0.5 to 1.0 m above the design elevation, lift the remaining concrete pipes, and complete the underwater concrete pouring.

2. A method for continuous pouring of bottom-sealed steel pipe column and anti-pulling pile concrete according to claim 1, characterized in that: The extension pipe is made of galvanized steel pipe, the length of which is determined according to the depth of the pull-out pile. A circular interface is provided at the bottom of the bottom-sealed steel pipe column, and the extension pipe is welded to the circular interface at the bottom of the bottom-sealed steel pipe column to achieve connectivity between the two.

3. The method for continuous pouring of bottom-sealed steel pipe column and anti-pulling pile concrete according to claim 1, characterized in that: In step 3), when injecting clean water into the bottom-sealed steel pipe column, the water level should be kept 1.0 to 2.0 m lower than the mud level in the pile hole; the extension pipe should be inserted until its bottom is 0.3 to 0.5 m away from the bottom of the hole.

4. The method for continuous pouring of bottom-sealed steel pipe column and anti-pulling pile concrete according to claim 1, characterized in that: In step 6) and step 8), the excessive depth refers to when the concrete conduit is buried 5.0 to 7.0 m into the concrete.

5. The method for continuous pouring of bottom-sealed steel pipe column and anti-pulling pile concrete according to claim 1, characterized in that: In step 7), before pouring underwater concrete in the pipe, the concrete conduit in the bottom-sealed steel pipe column needs to be lifted to a distance of 0.2 to 0.4 m from the inner bottom of the bottom-sealed steel pipe column before the concrete begins to set.

6. A bottom-sealed steel pipe column and pull-out pile concrete continuous casting structure, characterized in that: It includes a pile hole, an HPE insertion device, a tool pipe, a bottom-sealed steel pipe column, an extension pipe and a concrete conduit. The bottom of the bottom-sealed steel pipe column is connected to the top of the extension pipe. The bottom end of the extension pipe is provided with an openable one-way plugging plate. The HPE insertion device is installed on the top of the pile hole. The tool pipe is installed on the top of the bottom-sealed steel pipe column. The bottom-sealed steel pipe column and the extension pipe are inserted into the pile hole through the cooperation of the HPE insertion device and the tool pipe. The concrete conduit is inserted into the bottom-sealed steel pipe column and is aligned and tightly fitted with the top connecting port of the extension pipe.

7. The bottom-sealed steel pipe column and pull-out pile concrete continuous casting structure according to claim 6 is characterized by: A circular interface is provided at the bottom of the bottom-sealed steel pipe column, and the top end of the extension pipe is welded to the circular interface at the bottom of the bottom-sealed steel pipe column to achieve communication between the two.

8. The bottom-sealed steel pipe column and pull-out pile concrete continuous casting structure according to claim 6 is characterized by: The bottom end of the extension pipe is 0.3-0.5m away from the bottom of the pile hole.

9. The bottom-sealed steel pipe column and pull-out pile concrete continuous casting structure according to claim 6, characterized in that: A water-isolating ball is arranged in the extension tube.

10. The bottom-sealed steel pipe column and pull-out pile concrete continuous casting structure according to claim 6, characterized in that: The extension pipe is made of galvanized steel pipe.

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