CN112538856A

CN112538856A - Deep basal pit concrete placement chute

Info

Publication number: CN112538856A
Application number: CN202011402784.2A
Authority: CN
Inventors: 王春冉; 杜治衡; 姜浩; 谢连仲
Original assignee: No 5 Engineering Co Ltd of CCCC First Harbor Engineering Co Ltd
Current assignee: No 5 Engineering Co Ltd of CCCC First Harbor Engineering Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-03-23

Abstract

The invention discloses a concrete pouring chute for a deep foundation pit, which comprises an enclosure structure steel sheet pile, a primary chute and a secondary chute; the first-level chute is connected with the enclosure structure steel sheet pile through the clamping ring, the first-level chute can rotate up and down along the joint of the clamping ring, the second-level chute is connected with the first-level chute through the rotating shaft assembly, and the second-level chute can rotate 360 degrees along the horizontal plane of the joint. The deep foundation pit concrete pouring chute disclosed by the invention is matched with a primary chute and a secondary chute which rotate in a grading manner, so that the continuous construction of concrete can be ensured, and the concrete pouring construction quality is ensured.

Description

Deep basal pit concrete placement chute

Technical Field

The invention relates to a concrete pouring chute for a deep foundation pit, and belongs to the field of concrete pouring.

Background

Conventional deep foundation pit concrete placement is mostly the pumping, mostly is day pump or ground pump. When the pumping equipment fails and cannot be repaired in time, the concrete pouring construction is interrupted, concrete cannot be poured continuously, and construction quality problems such as cold joints, faults and the like are easily caused.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the deep foundation pit concrete pouring graded rotating chute, which ensures the continuous construction of concrete and the quality of concrete pouring construction.

In order to achieve the purpose, the deep foundation pit concrete pouring chute comprises an enclosure structure steel sheet pile, a first-stage chute and a second-stage chute;

the first-level chute is connected with the enclosure structure steel sheet pile through the clamping ring, the first-level chute can rotate up and down along the joint of the clamping ring, the second-level chute is connected with the first-level chute through the rotating shaft assembly, and the second-level chute can rotate 360 degrees along the horizontal plane of the joint.

Further, the rotating shaft assembly comprises an upper rotating shaft, an upper channel steel, a lower rotating shaft and a lower channel steel; go up the channel-section steel and install the bottom at the one-level chute, go up pivot horizontal installation and just can follow the axis rotation of last pivot in last channel-section steel, the one end vertical welding of pivot is on last pivot down, and the elliptical aperture that the other end passed last channel-section steel bottom is connected with lower channel-section steel, and gasket and nut are installed with the tip that lower channel-section steel is connected to lower pivot down, open at the both ends of channel-section steel down has the second grade chute connecting hole.

Furthermore, the upper channel steel is welded at the bottom of the first-stage chute.

Furthermore, the first-level chute is formed by processing section steel, and the second-level chute is of a wood structure.

Furthermore, the inclination angle of the first-stage chute is 27-36 degrees, and the inclination angle of the second-stage chute is 15-26 degrees.

Compared with the prior art, the deep foundation pit concrete pouring chute disclosed by the invention adopts the matching use of the primary chute and the secondary chute which rotate in a grading manner, so that the continuous construction of concrete can be ensured, and the concrete pouring construction quality is ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a joint of a primary chute and a secondary chute in the invention;

in the figure: 1. the concrete transportation vehicle comprises a crawler crane, 2, a concrete transportation vehicle, 3, an enclosure structure steel sheet pile, 4, a first-stage chute, 5, a second-stage chute, 6, an upper rotating shaft, 7, an upper channel steel, 8, a lower rotating shaft, 9, a nut, 10, a gasket, 11, a lower channel steel, 12 and a second-stage chute connecting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.

As shown in fig. 1 and 2, the deep foundation pit concrete pouring chute comprises an enclosure structure steel sheet pile 3, a primary chute 4 and a secondary chute 5; the one-level chute 4 is connected with the enclosure structure steel sheet pile 3 through the snap ring, the one-level chute 4 can rotate from top to bottom along the snap ring joint, the second-level chute 5 is connected with the one-level chute 4 through the rotating shaft assembly, and the second-level chute 5 can rotate 360 degrees along the horizontal plane of the joint.

As a modification of the embodiment, 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;

go up the bottom of channel-section steel 7 welding at one-level chute 4, go up 6 horizontal installation of pivot and can follow the axis rotation of last pivot 6 in last channel-section steel 7, the one end vertical welding of pivot 8 is on last pivot 6 down, and the elliptical aperture of the other end extension going up 7 bottoms of channel-section steel is connected with lower channel-section steel 11, and gasket 10 and nut 9 are installed to the tip that lower pivot 8 and lower channel-section steel 11 are connected, open at the both ends of channel-section steel 11 down has second grade chute connecting hole 12.

The invention uses section steel as a first-level chute 4 and a light wood structure as a second-level chute 5. The two-stage chute is connected through the rotating shaft component. Because second grade chute 5 adopts the wooden structure of lightweight, the manual work can be rotatory, and the convenience is better, and the work efficiency is higher.

When the chute is used, the first-stage chute 4 is lifted by the crawler crane 1 and is matched with the concrete transport vehicle 2 to transport concrete, the top end of the first-stage chute 4 is connected with the enclosure structure steel sheet pile 3 through a clamping ring to form hinged connection, and the first-stage chute 4 can be ensured to rotate up and down under the condition of ensuring safety and stability; the upper end of the second-stage chute 5 is connected with the lower end of the first-stage chute 4 through a rotating shaft assembly, and the second-stage chute 5 can rotate 360 degrees in the horizontal plane. The first-stage chute 4 is adjustable up and down, the second-stage chute 5 is adjustable in level, and the chute structure is graded and rotated, so that the coverage range of chute pouring is greatly enlarged.

The processing parameters of the chute need to be determined according to the width and the depth of the foundation pit, and the chute angle needs to be determined according to the slump, the workability and other performances of the concrete. The construction conditions and chute parameters which are successfully applied to the casting process of the concrete of the bottom plate of the river bottom of the Kanapu river under the project S1 segment EJD-6 in the great harbor of Bengal at present are as follows:

the depth of the foundation pit is 7.7m, and the horizontal maximum coverage range of the chute is 17.5 m. The concrete strength grade is C50P10, and the slump is 200 +/-20 mm. The length of the first-stage chute is 10m, the U750X 250 type steel sheet pile (when no available resource exists, the steel sheet pile is processed by section steel), and the chute angle is 27-36 degrees.

The length of the secondary chute is 6m, the batten and the multilayer board are nailed, and the use angle is 15-26 degrees. The efficiency of pouring concrete by the chute is about 40 m/h.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The deep foundation pit concrete pouring chute comprises an enclosure structure steel sheet pile (3), and is characterized by further comprising a first-stage chute (4) and a second-stage chute (5);

one-level chute (4) are connected with envelope steel sheet pile (3) through the snap ring, and one-level chute (4) can be followed the snap ring junction and rotated from top to bottom, second grade chute (5) are connected through pivot subassembly with one-level chute (4), and 360 rotations can be made along the junction horizontal plane in second grade chute (5).

2. The deep foundation pit concrete pouring chute according to claim 1, characterized in that the rotating shaft assembly comprises an upper rotating shaft (6), an upper channel (7), a lower rotating shaft (8) and a lower channel (11);

go up channel-section steel (7) and install the bottom at one-level chute (4), go up pivot (6) horizontal installation and can follow the axis rotation of last pivot (6) in last channel-section steel (7), the one end vertical welding of lower pivot (8) is on last pivot (6), and the elliptical hole that the other end passed last channel-section steel (7) bottom is connected with lower channel-section steel (11), and gasket (10) and nut (9) are installed to tip that lower pivot (8) and lower channel-section steel (11) are connected, open at the both ends of lower channel-section steel (11) has second grade chute connecting hole (12).

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

4. The deep foundation pit concrete pouring chute according to claim 1, characterized in that the primary chute (4) is formed by processing section steel, and the secondary chute (5) is of a wood structure.

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