Pre-burying construction method for large pipe joint

Abstract

The invention discloses a pre-embedding construction method for a large pipe joint, which comprises the following steps of: S1, pre-embedding a lower supporting assembly at a preset position of a concrete beam plate before hoisting the large pipe joint; s2, the large pipe joint is hoisted to a preset pre-buried position through hoisting equipment, the large pipe joint is placed on the lower supporting assembly, and at the moment, a lifting hook of the hoisting equipment is kept in a stress state; s3, according to the installation elevation of the large pipe joint, an upper supporting assembly with the corresponding height is erected on the concrete beam plate, and the upper supporting assembly is arranged in the inner circular hole of the large pipe joint and used for supporting the top of the inner circular hole; and S4, after the upper supporting assembly is erected, a lifting hook of the lifting equipment is removed, the large pipe joint and the wall steel reinforcement framework are bound, connected and fixed, and finally concrete is poured to complete pre-embedded installation of the large pipe joint. Independent and reliable fixing of the large pipe joint is achieved, the accuracy of the installation position of the large pipe joint can be effectively guaranteed, and potential safety hazards in the construction process are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a pre-embedded construction method for large pipe segments. Background Art

[0002] In underground building construction, due to the complexity and diversity of the pipeline system, pipe joints are usually pre-buried in the concrete wall in advance so that adjacent pipes located on both sides of the wall can be easily connected during subsequent construction to ensure the smooth flow of the pipeline system.

[0003] In the prior art, the pre-buried installation of pipe sections in underground buildings is generally carried out by hoisting them to the steel skeleton in the concrete shear wall using lifting equipment, and then tying and connecting them with the steel skeleton of the wall in a suspended state to form support for the pipe sections; or the pipe sections are hoisted to the wall formwork bracket using lifting equipment when the wall formwork is erected, and the wall formwork bracket is used to support the pipe sections. However, the above construction method has the following defects: (1) When pouring concrete for the wall, the steel skeleton or wall formwork bracket will be deformed by load disturbance, which will cause the pipe sections to shift and cause hidden dangers to the installation quality; (2) When encountering the pre-buried installation of large pipe sections, the steel skeleton or wall formwork bracket in the wall cannot bear the gravity load of the pipe section itself. Forcible fixation will not only cause quality risks, but also cause greater safety risks.

[0004] Therefore, it is necessary to improve the existing large-scale pipe segment pre-embedded construction method so that it can effectively solve the problems existing in the prior art. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a pre-embedded construction method for large pipe segments, by respectively arranging a lower support assembly below the pre-embedded position of the large pipe segment and an upper support assembly in the inner circular hole of the large pipe segment to assist in the installation and fixation of the large pipe segment before pre-embedding, thereby achieving independent and reliable fixation of the large pipe segment, avoiding the influence of concrete or its own load during pouring, thereby causing poor installation quality and safety hazards of the large pipe segment.

[0006] The present invention provides a pre-embedded construction method for a large pipe segment, comprising the following steps:

[0007] S1. Before hoisting the large pipe segment, a lower support assembly for supporting the bottom of the flange of the large pipe segment is embedded in the preset position of the concrete beam slab;

[0008] S2. Use a lifting device to lift the large pipe segment to the preset embedded position, and place the large pipe segment on the lower support assembly. At this time, the hook of the lifting device remains under stress;

[0009] S3. According to the installation elevation of the large pipe section, an upper support assembly of a corresponding height is set up on the concrete beam slab, and the upper support assembly is disposed in the inner circular hole of the large pipe section and is used to support the top of the inner circular hole;

[0010] S4. After the upper support assembly is erected, slowly remove the hook tension of the lifting equipment until the large pipe section is fully supported by the lower support assembly and the upper support assembly.

[0011] S5. Tie and connect the large pipe segments to the wall reinforcement skeleton, and finally pour concrete to complete the embedded installation of the large pipe segments.

[0012] Further, in step S1, the lower support assembly includes lower support members symmetrically arranged on the left and right sides of the central axis of the large pipe section, and the lower support members include vertical support columns embedded in the concrete beam and slab and transverse support beams arranged on the top of the vertical support columns.

[0013] Further, in step S3, the upper support assembly includes trapezoidal support frames symmetrically arranged on the axial front and rear sides of the large pipe section, and a connecting beam for supporting the top of the inner circular hole of the large pipe section is provided between the two relatively arranged trapezoidal support frames.

[0014] Furthermore, the connecting cross beams are in two pieces and are symmetrically arranged on a trapezoidal support frame located on the left and right sides of the central axis of the large pipe section.

[0015] Furthermore, a limiting member for axially limiting the large pipe section is provided on the top of the trapezoidal support frame.

[0016] Furthermore, a bracket embedded part is provided at the bottom of the trapezoidal support frame, and the bracket embedded part is used to fix the trapezoidal support frame on the concrete beam slab.

[0017] Furthermore, the connection points inside the lower support assembly and the upper support assembly are fixed by full welding.

[0018] The beneficial effects of the present invention are as follows: the pre-embedded construction method for large pipe sections of the present invention realizes the preliminary support positioning of the large pipe sections when hoisted to the pre-embedded positions by respectively arranging lower support assemblies below the pre-embedded positions of the large pipe sections, and realizes further support, bearing and movement limitation of the large pipe sections by arranging upper support assemblies in the inner circular holes of the large pipe sections; the support structure realizes independent and reliable fixation of the large pipe sections, and can effectively ensure the accuracy of the installation position of the large pipe sections, greatly reducing the potential safety hazards during the construction process; at the same time, after the construction is completed, the upper support assembly can be recycled and reused, reducing material loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 It is a structural schematic diagram of the support structure in the present invention;

[0021] Figure 2 It is a structural schematic diagram of the bracket embedded part in the present invention;

[0022] Figure 3 is a longitudinal cross-sectional view of the support structure of the present invention;

[0023] Figure 4 yes Figure 3 A magnified image of point A;

[0024] Explanation of the reference numerals: 1-large pipe section; 2-lower support member; 3-vertical support column; 4-lateral support beam; 5-trapezoidal support frame; 6-connecting crossbeam; 7-limiting member; 8-bracket embedded member; 9-concrete beam and slab; 10-wall steel frame; 11-hook; 12-concrete shear wall. DETAILED DESCRIPTION

[0025] As shown in the figure, the present invention provides a pre-embedded construction method for a large pipe segment, comprising the following steps:

[0026] S1. Before hoisting the large pipe segment, a lower support assembly for supporting the bottom of the flange of the large pipe segment is embedded in the preset position of the concrete beam slab;

[0027] S2. Use a lifting device to lift the large pipe segment to the preset embedded position, and place the large pipe segment on the lower support assembly. At this time, the hook of the lifting device remains under stress;

[0028] S3. According to the installation elevation of the large pipe section, an upper support assembly of a corresponding height is set up on the concrete beam slab, and the upper support assembly is disposed in the inner circular hole of the large pipe section and is used to support the top of the inner circular hole;

[0029] S4. After the upper support assembly is erected, slowly remove the hook tension of the lifting equipment until the large pipe section is fully supported by the lower support assembly and the upper support assembly.

[0030] S5. Tie and connect the large pipe segments to the wall reinforcement skeleton, and finally pour concrete to complete the embedded installation of the large pipe segments.

[0031] In this embodiment, before installing the large pipe segment 1, a vertical support column 3 is pre-embedded in the concrete beam slab 9. The concrete beam slab 9 is poured for the first time to an elevation of +0.3m. At this time, the buried depth of the vertical support column 3 in the concrete beam slab 9 is 0.5m. This vertical support column 3 serves as the first vertical support when installing the large pipe segment 1; then a transverse support beam 4 is arranged on the vertical support column 3, and a water stop plate is arranged on the transverse support beam 4. A lifting device (tower crane or crane) is used to lift the large pipe segment 1 to a predetermined installation position and place it on the transverse support beam 4. At this time, the lifting device remains in a stressed state; then, according to the installation elevation of the large pipe segment 1, a post-embedded chemical bolt is arranged on the concrete beam slab 9 to serve as a support point for the trapezoidal support frame 5; a channel steel bracket is arranged according to the method shown in the figure; finally, the lifting device is removed to complete the installation of the large pipe segment 1.

[0032] The lower support assembly is mainly used for the initial support and positioning of the large pipe segment 1 when it is hoisted to the embedded position, while the upper support assembly is used to further provide support and bearing for the large pipe segment 1, while limiting the forward and backward displacement of the large pipe segment 1 in the direction of the central axis, thereby ensuring the independent and reliable fixation of the large pipe segment 1, without relying on the wall steel skeleton 10 or the formwork support frame for support and positioning; and the coordinated use of the upper support assembly and the lower installation assembly can effectively ensure the accuracy of the installation position of the large pipe segment 1, so that the large pipe segment 1 will no longer be displaced due to the flow of concrete during pouring, greatly reducing the safety hazards during construction.

[0033] In this embodiment, the lower support assembly includes lower support members 2 symmetrically arranged on the left and right sides of the central axis of the large pipe section 1, and the lower support member 2 includes a vertical support column 3 embedded in the concrete beam slab 9 and a transverse support beam 4 arranged on the top of the vertical support column 3; Figure 1 and Figure 3 As shown, the lower support assembly includes two groups of lower support members 2 symmetrically arranged on the left and right sides of the central axis of the large pipe section 1. Since the lower support assembly is mainly used to support the bottom of the flange of the large pipe section 1, and the flange profile is a circular structure, at least two groups of lower support members 2 are required to support the large pipe section 1; and the lower support member 2 is formed by overlapping the vertical support column 3 and the horizontal support beam 4, wherein the vertical support column 3 and the horizontal support beam 4 are both made of channel steel and overlapped to form Figure 1 In the structure shown, in order to ensure that the lower support member 2 can support the large pipe section 1, the vertical support column 3 needs to be embedded in the concrete beam slab 9 before pouring the concrete beam slab 9 so that it has sufficient bearing capacity, and then a transverse support beam 4 is arranged on the top of the vertical support column 3, and a water stop plate is also arranged on the transverse support beam 4.

[0034] In this embodiment, the upper support assembly includes a trapezoidal support frame 5 symmetrically arranged on the front and rear sides of the large pipe section 1 axially, and a connecting crossbeam 6 for supporting the top of the inner circular hole of the large pipe section 1 is arranged between the two relatively arranged trapezoidal support frames 5; the connecting crossbeam 6 is two and symmetrically arranged on the trapezoidal support frames 5 located on the left and right sides of the central axis of the large pipe section 1; combined with Figure 1 and Figure 3 The upper support assembly is mainly used to support the top of the inner circular hole of the large pipe segment 1, wherein the trapezoidal support frame 5 is symmetrically arranged on the outer side of the flange surface on both sides of the axial front and rear of the large pipe segment 1, and the connecting crossbeam 6 is arranged between the two opposite trapezoidal support frames 5 and fixedly connected to the trapezoidal support frames 5. In this solution, there are two connecting crossbeams 6 and they are symmetrically arranged on the trapezoidal support frames 5 to ensure the stability of the support when contacting the top of the inner circular hole of the large pipe segment 1; the connecting crossbeam 6 and the trapezoidal support frame 5 are both formed by overlapping channel steels, and the connection relationship between the connecting crossbeam 6 and the trapezoidal support frame 5 is as shown in FIG. Figure 4 As shown, bolts are mainly used for fixing, and several channel steels in the trapezoidal support frame 5 are also detachably connected by bolts to facilitate subsequent recycling and reuse, thereby reducing material loss.

[0035] In this embodiment, a limiting member 7 for axially limiting the large pipe section 1 is provided on the top of the trapezoidal support frame 5; Figure 1 and Figure 3 The limiting member 7 is an angle steel arranged on the top of the trapezoidal support frame 5. Through the cooperation of the limiting members 7 on the front and rear sides, the movement of the large pipe section 1 in the front and rear directions of the central axis can be effectively limited, effectively ensuring the accuracy of the installation position of the large pipe section 1.

[0036] In this embodiment, a bracket embedded part 8 is provided at the bottom of the trapezoidal support frame 5, and the bracket embedded part 8 is used to fix the trapezoidal support frame 5 on the concrete beam slab 9; Figure 2 As shown, the bracket embedded part 8 is a steel foot plate with a thickness of 10 mm and is fixed on the concrete beam slab 9 by chemical anchor bolts.

[0037] In this embodiment, the connection points between the vertical support column 3 and the transverse support beam 4 in the lower support assembly, the connection points between the bracket embedded parts 8 in the upper support assembly and the trapezoidal support frame 5, and the connection points between the trapezoidal support frame 5 and the connecting cross beam 6 are all fixed by full welding.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A pre-embedded construction method for large pipe segments, characterized in that: The following steps are involved: S1. Before hoisting the large pipe segment, a lower support assembly for supporting the bottom of the flange of the large pipe segment is embedded in the preset position of the concrete beam slab; S2. Use a lifting device to lift the large pipe segment to the preset embedded position, and place the large pipe segment on the lower support assembly. At this time, the hook of the lifting device remains under stress; S3. According to the installation elevation of the large pipe section, an upper support assembly of a corresponding height is set up on the concrete beam slab, and the upper support assembly is disposed in the inner circular hole of the large pipe section and is used to support the top of the inner circular hole; S4. After the upper support assembly is erected, slowly remove the hook tension of the lifting equipment until the large pipe section is fully supported by the lower support assembly and the upper support assembly. S5. Tie and connect the large pipe segments to the wall reinforcement skeleton, and finally pour concrete to complete the embedded installation of the large pipe segments.

2. The pre-embedded construction method for large pipe segments according to claim 1, characterized in that: In step S1, the lower support assembly includes lower support members symmetrically arranged on the left and right sides of the central axis of the large pipe section, and the lower support members include vertical support columns embedded in the concrete beam slab and transverse support beams arranged on the top of the vertical support columns.

3. The pre-embedded construction method for large pipe segments according to claim 1, characterized in that: In step S3, the upper support assembly includes trapezoidal support frames symmetrically arranged on the axial front and rear sides of the large pipe segment, and a connecting beam for supporting the top of the inner circular hole of the large pipe segment is provided between the two relatively arranged trapezoidal support frames.

4. The pre-embedded construction method for large pipe segments according to claim 3 is characterized in that: There are two connecting cross beams which are symmetrically arranged on the trapezoidal support frame located on the left and right sides of the central axis of the large pipe section.

5. The pre-embedded construction method for large pipe segments according to claim 3 is characterized in that: A limiting member for axially limiting the large pipe section is arranged on the top of the trapezoidal support frame.

6. The pre-embedded construction method for large pipe segments according to claim 3 is characterized in that: A bracket embedded part is arranged at the bottom of the trapezoidal support frame, and the bracket embedded part is used to fix the trapezoidal support frame on the concrete beam slab.

7. The pre-embedded construction method for large pipe segments according to claim 1, characterized in that: The lower support assembly and the upper support assembly are fixed at the connection points by full welding.

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