A deep foundation pit concrete pouring chute

Abstract

The invention discloses a deep foundation pit concrete pouring chute, comprising a retaining structure steel sheet pile, a primary chute and a secondary chute; the primary chute is connected to the retaining structure steel sheet pile through a clamp ring, the primary chute can rotate up and down along the clamp ring connection, the secondary chute is connected to the primary chute through a rotating shaft assembly, and the secondary chute can rotate 360 ​​degrees along the horizontal plane of the connection. The deep foundation pit concrete pouring chute of the invention adopts the first and second chute of graded rotation to ensure continuous concrete construction and ensure the quality of concrete pouring construction.

Description

Technical Field

[0001] The invention relates to a deep foundation pit concrete pouring chute, belonging to the field of concrete pouring. Background Art

[0002] Conventional deep foundation pit concrete pouring is mostly done by pumping, mostly by overhead or ground pumps. When the pumping equipment fails and cannot be repaired in time, the concrete pouring construction will be interrupted and the continuous pouring of concrete will be impossible, which is very likely to cause construction quality problems such as cold joints and faults. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a deep foundation pit concrete pouring graded rotary chute to ensure continuous concrete construction and ensure the quality of concrete pouring construction.

[0004] In order to achieve the above-mentioned object, the present invention adopts a deep foundation pit concrete pouring chute, including a retaining structure steel sheet pile, and also includes a primary chute and a secondary chute;

[0005] The primary chute is connected to the steel sheet piles of the retaining structure through a clamp ring, and the primary chute can rotate up and down along the clamp ring connection. The secondary chute is connected to the primary chute through a rotating shaft assembly, and the secondary chute can rotate 360° along the horizontal plane of the connection.

[0006] Furthermore, the rotating shaft assembly includes an upper rotating shaft, an upper channel steel, a lower rotating shaft and a lower channel steel; the upper channel steel is installed at the bottom of the first-level chute, the upper rotating shaft is horizontally installed in the upper channel steel and can rotate along the axis of the upper rotating shaft, one end of the lower rotating shaft is vertically welded to the upper rotating shaft, and the other end extends through the elliptical hole at the bottom of the upper channel steel and is connected to the lower channel steel, the end of the lower rotating shaft connected to the lower channel steel is installed with a gasket and a nut, and the two ends of the lower channel steel are provided with secondary chute connecting holes.

[0007] Furthermore, the upper channel steel is welded to the bottom of the primary chute.

[0008] Furthermore, the first-level chute is made of steel sections, and the second-level chute is a wooden structure.

[0009] Furthermore, the inclination angle of the first-level chute is 27° to 36°, and the inclination angle of the second-level chute is 15° to 26°.

[0010] Compared with the prior art, the deep foundation pit concrete pouring chute of the present invention adopts the first and second level chutes which rotate in stages to ensure the continuous construction of concrete and the quality of concrete pouring construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention;

[0012] Figure 2 It is a structural schematic diagram of the connection between the primary and secondary chutes in the present invention;

[0013] In the figure: 1. crawler crane, 2. concrete transport vehicle, 3. steel sheet piles for retaining structure, 4. primary chute, 5. secondary chute, 6. upper rotating shaft, 7. upper channel steel, 8. lower rotating shaft, 9. nut, 10. gasket, 11. lower channel steel, 12. connecting hole for secondary chute. DETAILED DESCRIPTION

[0014] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the scope of the present invention.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0016] like Figure 1 , Figure 2 As shown, a deep foundation pit concrete pouring chute includes a retaining structure steel sheet pile 3, a primary chute 4 and a secondary chute 5; the primary chute 4 is connected to the retaining structure steel sheet pile 3 by a clamping ring, and the primary chute 4 can rotate up and down along the clamping ring connection; the secondary chute 5 is connected to the primary chute 4 by a rotating shaft assembly, and the secondary chute 5 can rotate 360° along the horizontal plane of the connection.

[0017] As an improvement of the embodiment, the shaft assembly includes an upper shaft 6, an upper channel steel 7, a lower shaft 8 and a lower channel steel 11;

[0018] The upper channel steel 7 is welded to the bottom of the primary chute 4, the upper rotating shaft 6 is horizontally installed in the upper channel steel 7 and can rotate along the axis of the upper rotating shaft 6, one end of the lower rotating shaft 8 is vertically welded to the upper rotating shaft 6, and the other end extends through the elliptical hole at the bottom of the upper channel steel 7 and is connected to the lower channel steel 11, and the end of the lower rotating shaft 8 connected to the lower channel steel 11 is installed with a gasket 10 and a nut 9, and the two ends of the lower channel steel 11 are provided with secondary chute connecting holes 12.

[0019] The present invention uses steel as the primary chute 4 and a light wooden structure as the secondary chute 5. The two chute stages are connected by a rotating shaft assembly. Since the secondary chute 5 uses a light wooden structure, it can be rotated manually, which is convenient and efficient.

[0020] When in use, the crawler crane 1 is used to lift the primary chute 4, and the concrete is transported by the concrete transport truck 2. The top of the primary chute 4 is connected to the steel sheet pile 3 of the enclosure structure through a clamp ring to form a hinged connection. Under the condition of ensuring safety and stability, the primary chute 4 can be rotated up and down; the upper end of the secondary chute 5 is connected to the lower end of the primary chute 4 through a rotating shaft assembly to ensure that the secondary chute 5 can rotate 360° in the horizontal plane. The primary chute 4 can be adjusted up and down, and the secondary chute 5 can be adjusted horizontally. The graded and rotating chute structure greatly increases the coverage of the chute casting.

[0021] The processing parameters of the chute need to be determined according to the width and depth of the foundation pit, and the angle of the chute needs to be determined according to the slump and workability of the concrete. The construction conditions and chute parameters that have been successfully applied to the EJD-6 bottom slab concrete pouring process of the S1 section of the Karnaphuli River Tunnel Project in Chittagong, Bangladesh are as follows:

[0022] The foundation pit depth is 7.7m, and the maximum horizontal coverage of the chute is 17.5m. The concrete strength grade is C50P10, and the slump is 200±20mm. The length of the first-level chute is 10m, U750×250 steel sheet pile (when there is no available resource, it is processed with steel section), and the chute angle is 27°~36°.

[0023] The secondary chute is 6m long and made of wood and multi-layer boards, with an angle of 15° to 26°. The efficiency of pouring concrete in the chute is about 40m³ / h.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A deep foundation pit concrete pouring chute, comprising a retaining structure steel sheet pile (3), characterized in that: It also includes a primary chute (4) and a secondary chute (5); The primary chute (4) is connected to the steel sheet pile (3) of the enclosure structure via a clamp ring, and the primary chute (4) can rotate up and down along the clamp ring connection. The secondary chute (5) is connected to the primary chute (4) via a rotating shaft assembly, and the secondary chute (5) can rotate 360 ​​degrees along the horizontal plane of the connection. The rotating shaft assembly comprises an upper rotating shaft (6), an upper channel steel (7), a lower rotating shaft (8) and a lower channel steel (11); The upper channel steel (7) is installed at the bottom of the primary chute (4); the upper rotating shaft (6) is installed horizontally in the upper channel steel (7) and can rotate along the axis of the upper rotating shaft (6); one end of the lower rotating shaft (8) is vertically welded to the upper rotating shaft (6); the other end extends through the elliptical hole at the bottom of the upper channel steel (7) and is connected to the lower channel steel (11); a gasket (10) and a nut (9) are installed at the end where the lower rotating shaft (8) is connected to the lower channel steel (11); and secondary chute connecting holes (12) are opened at both ends of the lower channel steel (11).

2. The deep foundation pit concrete pouring chute according to claim 1, characterized in that: The upper channel steel (7) is welded to the bottom of the primary chute (4).

3. The deep foundation pit concrete pouring chute according to claim 1, characterized in that: The primary chute (4) is made of steel and the secondary chute (5) is a wooden structure.

4. The deep foundation pit concrete pouring chute according to claim 1, characterized in that: The inclination angle of the primary chute (4) is 27° to 36°, and the inclination angle of the secondary chute (5) is 15° to 26°.

Images