Feeding vertical shaft for tunnel concrete conveying

Abstract

The utility model relates to a tunnel feeding vertical shaft, in particular to a feeding vertical shaft for tunnel concrete conveying, which comprises a vertical shaft and a tunnel, and further comprises a plurality of articulated chutes, each articulated chute comprises an upper vertical pipe and a lower vertical pipe, the upper end of each upper vertical pipe is open, the lower end of each upper vertical pipe is closed, the upper end of each lower vertical pipe is closed, the lower end of each lower vertical pipe is open, and the side surface of the lower end of each upper vertical pipe is communicated with the side surface of the upper end of each lower vertical pipe; a lower end opening of the first elephant trunk is communicated with an upper end opening of the second elephant trunk, a lower vertical pipe of the second elephant trunk and an upper vertical pipe of the first elephant trunk are coaxially arranged, a lower end opening of the second elephant trunk is communicated with an upper end opening of the third elephant trunk, and a lower vertical pipe of the third elephant trunk and an upper vertical pipe of the second elephant trunk are coaxially arranged; a plurality of communicated articulated chutes are vertically placed in the vertical shaft, and the articulated chute at the lowermost end is communicated with the tunnel. The whole fall from the original ground to the tunnel is divided into a plurality of transportation sections with small fall by the pipelines communicated with the plurality of articulated chutes, so that the aggregate segregation phenomenon is not easy to occur during concrete transportation, and the subsequent concrete pouring quality is not influenced.

Description

Technical Field

[0001] The utility model relates to a tunnel feeding shaft, in particular to a tunnel feeding shaft used for conveying tunnel concrete. Background Art

[0002] The vertical well-shaped pipe on the tunnel wall is called a vertical shaft. The vertical shaft is square, long or irregularly circular in plan view. In the tunnel concrete construction project, in order to save the time of transporting concrete to the tunnel, a vertical shaft will be drilled on the ground to connect with the tunnel, and a chute will be placed in the vertical shaft to transport the concrete directly into the tunnel through the chute in the vertical shaft. Transporting concrete through the vertical shaft can speed up the construction progress and save construction costs.

[0003] The current vertical shaft is linear, and the transported concrete falls directly from the ground into the tunnel. The large drop makes it easy for aggregate segregation to occur during the transportation of concrete, affecting the quality of subsequent concrete pouring.

[0004] Therefore, a feeding shaft with reduced height is needed to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a feeding shaft for conveying tunnel concrete.

[0006] The technical solution adopted by the utility model is:

[0007] A feeding shaft for conveying tunnel concrete comprises a shaft and a tunnel, and also comprises a plurality of chutes, wherein the chutes comprise an upper vertical pipe and a lower vertical pipe, wherein the upper vertical pipe is open at the upper end and closed at the lower end, and the lower vertical pipe is closed at the upper end and open at the lower end, and the lower end side surface of the upper vertical pipe is connected with the upper end side surface of the lower vertical pipe; the connected chutes are sequentially recorded as a first chute, a second chute, a third chute, etc. in the order of connection; the lower end opening of the first chute is connected with the upper end opening of the second chute, the lower vertical pipe of the second chute is coaxially arranged with the upper vertical pipe of the first chute, the lower end opening of the second chute is connected with the upper end opening of the third chute, the lower vertical pipe of the third chute is coaxially arranged with the upper vertical pipe of the second chute, and the subsequent chute pipes are connected in the same manner; the connected multiple chute pipes are vertically placed in the shaft, and the chute at the lowest end is connected with the tunnel.

[0008] Furthermore, an inclined plate is provided inside the lower end of the upper vertical pipe, and the inclined plate is inclined toward the side where the lower vertical pipe is located.

[0009] Furthermore, a wall protection pipe is fixedly installed in the vertical shaft, and multiple groups of horizontally arranged support components are axially installed in the wall protection pipe, and each group of support components includes two support steel beams; the left and right ends of the support steel beams pass through the wall protection pipe; the support steel beams are fixedly connected to the slide pipe.

[0010] Preferably, the wall protection tube is equally divided into a plurality of wall protection tube segments along the axial direction, and a set of the support components is correspondingly installed on each wall protection tube segment.

[0011] Preferably, the supporting steel beam is an I-beam, which includes upper and lower wing plates and a web, and the installation direction of the I-beam is that the web plate is in the vertical direction and the upper and lower wing plates are in the horizontal direction; the upper end opening of the upper vertical pipe and the lower end opening of the lower vertical pipe are provided with flanges, and adjacent slide pipes are connected by flanges; the wing plates of the I-beam are fixedly connected to the flanges.

[0012] Preferably, the two supporting steel beams of each group of the supporting assemblies are arranged in parallel.

[0013] Furthermore, an arch-shaped bracket is installed in the tunnel, and the lowermost slide pipe is connected to the top of the bracket.

[0014] Furthermore, the space between the wall protection pipe and the vertical shaft is filled with micro-expansive cement.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0016] The chute in the utility model is formed by staggered connection of an upper vertical pipe and a lower vertical pipe, and a bearing surface is formed at the bottom of the upper vertical pipe of each chute, which is used to buffer the concrete during transportation. The pipeline connected by multiple chute pipes divides the original overall drop from the ground to the tunnel into multiple transportation sections with small drops, so that the aggregate segregation phenomenon is not easy to occur during the transportation of concrete, and the quality of subsequent concrete pouring is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the overall structure diagram of the utility model.

[0018] Figure 2 This is the structure diagram of the slide pipe.

[0019] Figure 3 This is a cross-sectional view of the connected state of the slide pipe.

[0020] Figure 4 This is a cross-sectional view of the wall protection tube.

[0021] Figure 5 This is a diagram of the bracket structure.

[0022] The meanings of the numbers in the figure are: 1- slide pipe, 11- upper vertical pipe, 12- lower vertical pipe, 13- inclined plate, 14- flange, 2- vertical shaft, 3- wall protection pipe, 4- tunnel, 5- supporting steel beam, 6- bracket. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the accompanying drawings in the embodiments of the utility model, so as to have a further understanding of the concept of the utility model, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0024] like Figure 1 and Figure 2 As shown, a feeding shaft for tunnel concrete transportation includes a shaft 2 and a tunnel 4, and also includes a plurality of chutes 1, wherein the chutes 1 include an upper vertical pipe 11 and a lower vertical pipe 12, wherein the upper vertical pipe 11 is open at the upper end and closed at the lower end, and the lower vertical pipe 12 is closed at the upper end and open at the lower end, and the lower end side surface of the upper vertical pipe 11 is connected with the upper end side surface of the lower vertical pipe 12; the connected chutes 1 are sequentially recorded as the first chutes, the second chutes, the third chutes, etc. in the order of connection. The lower end opening of the first chutes is connected with the upper end opening of the second chutes, the lower vertical pipe 12 of the second chutes is coaxially arranged with the upper vertical pipe 11 of the first chutes, the lower end opening of the second chutes is connected with the upper end opening of the third chutes, the lower vertical pipe 12 of the third chutes is coaxially arranged with the upper vertical pipe 11 of the second chutes, and the subsequent chutes 1 are connected in the same manner. The connected multiple chutes 1 are vertically placed in the shaft 2, and the chutes 1 at the lowest end are connected with the tunnel 4.

[0025] The shaft 2 is connected to the ground and the tunnel 4, and the concrete on the ground is poured into the tunnel 4 through the shaft 2 for use. At present, the conventional feeding method is direct feeding. The problem caused by direct feeding of concrete is that the drop of the feeding is too large, which will cause aggregate segregation in the concrete, affecting the quality of subsequent concrete pouring. Concrete segregation is a phenomenon in which the cohesive force between the constituent materials of the concrete mixture is not enough to resist the sinking of the coarse aggregate, and the components of the concrete mixture are separated from each other, resulting in uneven internal composition and structure. It is usually manifested as the separation of coarse aggregate and mortar, for example, high-density particles are deposited at the bottom of the mixture, or the coarse aggregate is separated from the mixture as a whole. It affects the pumping construction performance of concrete, causes sticking to the tank, blocking the pipe, affecting the construction period, etc., and reduces economic benefits. It affects the appearance of the concrete structure, and sand patterns, exposed aggregates, exposed steel bars, etc. appear on the concrete surface. The strength of the concrete is greatly reduced, which seriously affects the bearing capacity of the concrete structure and destroys the safety performance of the structure. In severe cases, rework will be caused, resulting in huge economic losses.

[0026] In the utility model, a plurality of chutes 1 are connected to form a chute for transporting concrete, and the structure of the chute 1 is formed by staggered connection of an upper vertical pipe 11 and a lower vertical pipe 12. The bottom of the upper vertical pipe 11 forms a bearing surface, and the multiple bearing surfaces after the plurality of chutes 1 are connected divide the original overall drop from the ground to the tunnel 4 into multiple transport sections. The drop of each transport section is not large, and thus the phenomenon of aggregate segregation is not easy to occur during transportation, and the quality of subsequent concrete pouring will not be affected. The plurality of chutes 1 are connected in such a way that the lower vertical pipe 12 of the first chute 1 is coaxially connected with the upper vertical pipe 11 of the second chute 1, and the lower vertical pipe 12 of the second chute 1 is coaxially arranged with the upper vertical pipe 11 of the first chute 1. The chute after connection is staggered left and right, and the overall center of gravity of the chute is located in the middle of the chute, and the structure is stable and not easy to shake.

[0027] Furthermore, an inclined plate 13 is provided inside the lower end of the upper vertical pipe 11, and the inclined plate 13 is inclined toward the side where the lower vertical pipe 12 is located. The inclined plate 13 is provided to guide the concrete falling vertically in the upper vertical pipe 11, so that the concrete flows into the lower vertical pipe 12 more smoothly.

[0028] Furthermore, a wall protection pipe 3 is fixedly installed in the vertical shaft 2, and multiple groups of horizontally arranged support components are installed in the wall protection pipe 3 along the axial direction, and each group of support components includes two support steel beams 5; the left and right ends of the support steel beams 5 pass through the wall protection pipe 3; the support steel beams 5 are fixedly connected to the chute 1. The chute formed by connecting multiple chute pipes 1 has a left-right staggered structure and has to withstand the impact of concrete multiple times during transportation, so the stability of the chute in the utility model is lower than that of the conventional linear chute. Multiple chute pipes 1 pass through the vertical shaft 2, connecting the ground and the tunnel 4, and the wall protection pipe 3 is fixedly connected to the vertical shaft 2, and the support steel beams 5 passing through the wall protection pipe 3 are fixedly connected to the chute 1 to support the chute 1. The wall protection pipe 3 installed on the vertical shaft 2 has high stability, and the chute 1 connected to the wall protection pipe 3 through the support steel beams 5 also has higher stability.

[0029] Preferably, the wall protection pipe 3 is equally divided into a plurality of wall protection pipe sections along the axial direction, and a set of the support components is installed on each wall protection pipe section. The wall protection pipe 3 is equally divided into a plurality of wall protection pipe sections, and the individual wall protection pipe sections can be installed step by step during the installation process to reduce the installation difficulty.

[0030] Preferably, the support steel beam 5 is an I-beam, which includes upper and lower wing plates and a web, and the installation direction of the I-beam is that the web is in a vertical direction and the upper and lower wing plates are in a horizontal direction; the upper end opening of the upper vertical pipe 11 and the lower end opening of the lower vertical pipe 12 are provided with a flange 14, and adjacent slide pipes 1 are connected by the flange 14; the wing plates of the I-beam are fixedly connected to the flange 14. The support steel beam 5 is an I-beam, and the installation direction of the I-beam is that the web is in a vertical direction and the upper and lower wing plates are in a horizontal direction, so that the flange 14 and the wing plates of the I-beam are both in a horizontal state, and the fixed connection of the flange 14 and the I-beam is more convenient.

[0031] Preferably, the two supporting steel beams 5 of each group of the supporting assemblies are arranged in parallel.

[0032] Furthermore, an arch-shaped bracket 6 is installed in the tunnel 4, and the specific way in which the lowermost chute 1 is connected to the tunnel 4 is that the lowermost chute 1 is connected to the top of the bracket 6. After the concrete is transported to the tunnel 4, the next step of transportation is still required, and the concrete is transported to the construction area by a concrete transport vehicle. The arch-shaped bracket 6 is set, and the concrete transport vehicle can be driven under the bracket 6 to fill the concrete with the chute 1.

[0033] Furthermore, the wall protection pipe 3 and the shaft 2 are filled with micro-expansive cement. The micro-expansive cement can expand to a certain extent during hydration due to the action of the expansion agent, thereby making the connection between the wall protection pipe 3 and the shaft 2 more stable.

[0034] The words “connection” and “fixation” appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0035] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A feeding shaft for conveying tunnel concrete, comprising a shaft (2) and a tunnel (4), characterized in that: The invention also comprises a plurality of slide pipes (1), wherein the slide pipes (1) comprise an upper vertical pipe (11) and a lower vertical pipe (12), wherein the upper vertical pipe (11) is open at the upper end and closed at the lower end, and the lower vertical pipe (12) is closed at the upper end and open at the lower end, and the lower end side surface of the upper vertical pipe (11) is connected to the upper end side surface of the lower vertical pipe (12); the connected slide pipes (1) are sequentially recorded as a first slide pipe, a second slide pipe, and a third slide pipe in the order of connection; the lower end opening of the first slide pipe is connected to the second slide pipe. The lower vertical pipe (12) of the second slide pipe is coaxially arranged with the upper vertical pipe (11) of the first slide pipe, the lower opening of the second slide pipe is connected with the upper opening of the third slide pipe, the lower vertical pipe (12) of the third slide pipe is coaxially arranged with the upper vertical pipe (11) of the second slide pipe, and the subsequent slide pipes (1) are connected in the same manner; the multiple connected slide pipes (1) are vertically placed in the vertical shaft (2), and the lowest slide pipe (1) is connected to the tunnel (4).

2. A feeding shaft for tunnel concrete transportation according to claim 1, characterized in that: An inclined plate (13) is provided inside the lower end of the upper vertical tube (11), and the inclined plate (13) is inclined toward the side where the lower vertical tube (12) is located.

3. A feeding shaft for tunnel concrete transportation according to claim 1, characterized in that: A wall protection pipe (3) is fixedly installed in the vertical shaft (2), and a plurality of groups of horizontally arranged support components are axially installed in the wall protection pipe (3), and each group of support components comprises two support steel beams (5); the left and right ends of the support steel beams (5) penetrate the wall protection pipe (3); and the support steel beams (5) are fixedly connected to the slide pipe (1).

4. A feeding shaft for tunnel concrete transportation according to claim 3, characterized in that: The wall protection pipe (3) is equally divided into a plurality of wall protection pipe sections along the axial direction, and each wall protection pipe section is correspondingly provided with a set of the support components.

5. A feeding shaft for tunnel concrete transportation according to claim 3, characterized in that: The supporting steel beam (5) is an I-beam, which comprises upper and lower wing plates and a web plate. The installation direction of the I-beam is such that the web plate is in a vertical direction and the upper and lower wing plates are in a horizontal direction. The upper end opening of the upper vertical pipe (11) and the lower end opening of the lower vertical pipe (12) are provided with flanges (14), and adjacent slide pipes (1) are connected via the flanges (14). The wing plates of the I-beam are fixedly connected to the flanges (14).

6. A feeding shaft for tunnel concrete transportation according to claim 3, characterized in that: The two supporting steel beams (5) of each group of the supporting components are arranged in parallel.

7. A feeding shaft for tunnel concrete transportation according to claim 1, characterized in that: An arch-shaped bracket (6) is installed in the tunnel (4), and the lowermost slide pipe (1) is connected to the top of the bracket (6).

8. The vertical shaft for feeding concrete for tunnel transportation according to claim 3, characterized in that: The space between the wall protection pipe (3) and the vertical shaft (2) is filled with micro-expansive cement.

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