Elephant trunk construction method combined with foundation pit support

Abstract

The invention provides an articulated chute construction method combined with a foundation pit support, which relates to the technical field of articulated chute construction and comprises the steps of articulated chute system design, articulated chute slope test, articulated chute system installation position confirmation, installation platform and aggregate bin installation, vertical articulated chute installation, inclined articulated chute installation, end chute and articulated chute discharge hopper installation and the like. The problems that a conventional foundation pit engineering bottom plate is low in pouring efficiency and large in potential quality hazard can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of chute construction, and specifically to a chute construction method combined with foundation pit enclosure. Background Art

[0002] With the increasing maturity of urbanization and the growing scarcity of available urban land, urban development is gradually expanding from the horizontal dimension to the vertical dimension. The large-volume concrete floor slab meets the structural characteristics of super high-rise buildings, ensuring the integrity, safety, and stability of the structure. The conventional chute pouring method is limited by factors such as limited space, underground structure height difference, and workability of concrete, resulting in many difficulties such as easy pipe blockage of concrete, inability to fully cover the chute aggregate bin, and difficulty in ensuring the safety of workers' operations. How to solve the above problems is a technical issue worthy of research. Summary of the Invention

[0003] In view of the above-mentioned prior art, the present invention proposes a chute construction method combined with foundation pit enclosure.

[0004] A chute construction method combined with foundation pit enclosure provided by the present invention includes the following steps: S1. Chute system design: Using the concrete internal support system as the support foundation system, on this basis, set the aggregate bin and its installation platform on the support node unit, and borrow the support beam and lattice column as the erection route of the conveying system. In the plane design stage, determine the layout points of the aggregate bin according to the chute pouring area, the length of the finished chute, and the requirements of the chute slope. S2. Chute slope test: Before the formal installation of the chute, conduct a chute slope test. S3. Confirmation of the installation position of the chute system: According to the chute plane design drawing and the results of the chute slope test, confirm the final installation position and elevation of the aggregate bin, and process the installation platform of the aggregate bin accordingly. S4. Installation of the installation platform and the aggregate bin: Carry out welding and processing of the aggregate bin. After the installation platform is assembled, install the aggregate bin. S5. Installation of the vertical chute: According to the position of the installation platform and the aggregate bin, set up installation brackets on the concrete support beam, place the vertical chute into the installation brackets, and temporarily lean it. After the aggregate bin at the top is installed, connect it to the connection port extended from the aggregate bin. S6. Installation of the inclined chute: Before installing the aggregate bin, hoist and place the two ends of the inclined chute on two adjacent installation platforms and fix them firmly. When the angle of the aggregate bin base on the installation platform is adjusted, connect it to the aggregate bin according to the designed slope. S7. Installation of the end chute and the chute discharge hopper: After the chute is installed, install the end chute and the chute discharge hopper.

[0005] Preferably, in S3, a No. 16 I-beam is used as the vertical support of the installation platform, an No. 8 I-beam is used as the horizontal support of the installation platform, and an L5 angle steel is welded to form a cross brace.

[0006] Preferably, in S5, after the vertical chute is installed, a diversion bin is installed at its bottom to divert the concrete in the vertical chute into two directions for transportation.

[0007] Preferably, in S7, the end chute is located at the end of the chute for distributing concrete and controlling the flow direction of the concrete construction surface. It is formed by cutting a seamless steel pipe and is a semi-circular chute, supported by a movable steel bar support; the chute discharge hopper is located at the top of the chute for discharging concrete from the concrete mixer truck.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a chute construction method combined with the foundation pit enclosure, which is mainly used for the large-volume bottom plate concrete pouring project with a complex internal support structure, and can solve the problems of low pouring efficiency and large quality hidden dangers in the bottom plate pouring of conventional foundation pit projects. Description of the Drawings

[0009] Figure 1 is the installation schematic diagram of the vertical chute in the embodiment of the present invention.

[0010] Figure 2 is the structural schematic diagram of the inclined chute in the embodiment of the present invention.

[0011] Figure 3 is the structural schematic diagram of the chute discharge hopper in the embodiment of the present invention.

[0012] In the figure, 1, vertical chute; 2, installation bracket; 3, inclined chute; 4, end chute; 5, chute discharge hopper; 6, steel bar support. Detailed Embodiments

[0013] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0014] Embodiment: As Figures 1 - 3 shown, a chute construction method combined with the foundation pit enclosure includes the following steps: S1. Chute system design: Combining the on-site construction conditions of the project, using the concrete internal support system as the support foundation system, on this basis, setting the aggregate bin and its installation platform on the support node unit, and borrowing the support beam and lattice column as the erection route of the conveying system. In the plane design stage, according to the chute pouring area, the length of the finished chute and the chute slope requirements, determine the layout points of the aggregate bin.

[0015] S2, Chute Slope Test: Before the formal installation of the chute, a chute slope test is carried out. Specifically: An aggregate bin is set on the support beam, and by adjusting the height of the end chute, the concrete flow rate at different slopes is tested to confirm that the chute slope is controlled within 12° - 24°, and the chute design system is finally adjusted according to the test results.

[0016] S3, Confirmation of the Installation Position of the Chute System: Based on the chute plane design drawing and the results of the chute slope test, the final installation position and elevation of the aggregate bin are confirmed, and the installation platform for the aggregate bin is processed accordingly. On-site, 16# I-beams are used as the vertical supports of the installation platform, and 8# I-beams are used as the horizontal supports of the installation platform. At the same time, to ensure the stability of the installation platform, L5 angle steels are welded to form cross braces to increase the anti-overturning performance.

[0017] S4, Installation of the Installation Platform and the Aggregate Bin: On-site, a 5-mm-thick steel plate is used for the welding and processing of the aggregate bin. After the installation platform is assembled, the aggregate bin is installed using a tower crane and a chain block.

[0018] S5, Installation of the Vertical Chute: According to the positions of the installation platform and the aggregate bin, angle irons L50X4 are welded on the concrete support beam to form a hoop as the installation bracket 2 for the vertical chute 1. The vertical chute 1 is hoisted using a tower crane and placed into the installation bracket 2 for temporary leaning. After the aggregate bin at the top is installed, it is then flange-connected to the connection port extending from the aggregate bin. After the installation of the vertical chute 1 is completed, a diversion bin is installed at its bottom to divert the concrete in the vertical chute 1 in two directions for transportation.

[0019] S6, Installation of the Inclined Chute: For easy installation and disassembly, lifting rings are set on the inclined chute 3. The horizontal projection distance of the inclined chute 3 is not greater than 12 m. Before the installation of the aggregate bin, the two ends of the inclined chute 3 are hoisted and placed on two adjacent installation platforms and fixed firmly. After the angle of the aggregate bin base on the installation platform is adjusted, it is then connected to the aggregate bin according to the designed slope.

[0020] S7, Installation of the End Chute and the Chute Discharge Hopper: After the installation of the chute is completed, the end chute 4 and the chute discharge hopper 5 are installed. The end chute 4 is located at the end of the chute and is used for distributing concrete to control the flow direction of the concrete construction surface. It is made by cutting a seamless steel pipe with a size of 325×3 in half and is a semi-circular chute, supported by a movable steel bar bracket 6. The chute discharge hopper 5 is located at the top of the chute and is used for discharging concrete from the concrete mixer truck.

[0021] The above is only the implementation mode of the present invention and does not limit the patent scope of the present invention. Any equivalent solutions made using the content of the specification of the present invention, directly or indirectly applied in other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A construction method of a chute pipe combined with foundation pit retaining, characterized in that It includes the following steps: S1. Chute system design: Using the concrete internal support system as the support foundation system, on this basis, set the aggregate bin and its installation platform on the support node unit, and borrow the support beam and lattice column as the erection route of the conveying system. In the plane design stage, determine the layout points of the aggregate bin according to the pouring area of the chute, the length of the finished chute, and the chute slope requirements. S2. Chute slope test: Conduct a chute slope test before the formal installation of the chute. S3. Confirmation of the installation position of the chute system: According to the chute plane design drawing and the results of the chute slope test, confirm the final installation position and elevation of the aggregate bin, and process the installation platform of the aggregate bin accordingly. S4. Installation of the installation platform and the aggregate bin: Carry out the welding and processing of the aggregate bin. After the installation platform is assembled, install the aggregate bin. S5. Installation of the vertical chute: According to the position of the installation platform and the aggregate bin, set up installation brackets on the concrete support beam, place the vertical chute into the installation brackets, and temporarily lean it. After the aggregate bin at the top is installed, connect it to the connection port extended from the aggregate bin. S6. Installation of the inclined chute: Before installing the aggregate bin, hoist and place the two ends of the inclined chute on two adjacent installation platforms and fix them firmly. When the angle of the aggregate bin base on the installation platform is adjusted, connect it to the aggregate bin according to the designed slope. S7. Installation of the end chute and the chute discharge hopper: After the chute is installed, install the end chute and the chute discharge hopper.

2. The chute pipe construction method combined with foundation pit enclosure according to claim 1, characterized in that, In S3, 16# I-beams are used as the vertical supports of the installation platform, 8# I-beams are used as the horizontal supports of the installation platform, and L5 angle steels are welded to form diagonal braces.

3. The chute pipe construction method combined with foundation pit enclosure according to claim 1 or 2, characterized in that, In S5, after the vertical chute is installed, a diversion bin is installed at its bottom to divert the concrete in the vertical chute into two directions for conveying.

4. The construction method of the chute pipe combined with the foundation pit enclosure as described in claim 1 or 2, characterized in that In S7, the end chute is located at the end of the chute and is used for distributing concrete to control the flow direction of the concrete construction surface. It is cut from seamless steel pipes and is a semi-circular chute, supported by a movable steel bar bracket; the chute discharge hopper is located at the top of the chute and is used for discharging concrete from the concrete truck.

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