CN212742630U

CN212742630U - Non-excavation formula utility tunnel outlet structure of taking stiffening beam

Info

Publication number: CN212742630U
Application number: CN202021302252.7U
Authority: CN
Inventors: 杨明宇; 李松; 尹学军; 贾瑾旭; 李秋实
Original assignee: China Urban Construction Design and Research Institute Co Ltd
Current assignee: China Urban Construction Design and Research Institute Co Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-03-19
Anticipated expiration: 2030-07-06

Abstract

The utility model provides a take non-excavation formula utility tunnel outlet structure of stiffening beam, including piping lane standard section (1), from horizontal passageway (2) that the piping lane standard section was drawn forth and communicate to outlet (3) to ground from this horizontal passageway top horizontal passageway is equipped with stiffening beam (5) with the outlet junction, and settle a plurality of slip casting anchor pipes (9) between outlet dado and the soil. The utility model discloses a pipeline outlet structure, the utility model is particularly useful for having had the utility tunnel construction project in urban area and the pipeline corridor transformation project in old district and use.

Description

Non-excavation formula utility tunnel outlet structure of taking stiffening beam

Technical Field

The invention relates to a comprehensive pipe gallery outlet structure and a construction method thereof.

Background

The urban comprehensive pipe gallery is a municipal public channel built under the ground of an urban road, and is a municipal public facility integrating various municipal pipelines such as electric power, communication, water supply, fuel gas and the like.

In order to draw out pipelines to plots and road networks along the line, the urban comprehensive pipe gallery needs to arrange pipelines at corresponding positions to draw out ports, and at present, the most common form of pipeline drawing out ports in the design of the urban comprehensive pipe gallery is direct burial, namely: the pre-buried pipeline between city utility tunnel and the landmass draws forth a mouthful passageway, draws forth electric power, communication, water supply line from the utility tunnel and reaches corresponding landmass and road network through this drawing forth a mouthful pipeline. However, utility tunnels implemented in old urban areas typically do not have open cut construction methods, and may be constructed using trenchless techniques. The more common trenchless construction technique is shallow-buried subsurface excavation. However, the depth of the comprehensive pipe gallery constructed by the shallow-buried underground excavation method is much greater than that of the comprehensive pipe gallery constructed by other methods.

CN107435340A discloses a pipeline outlet structure of a non-excavation type comprehensive pipe gallery and a method thereof, the pipeline outlet structure comprises an outlet well, a connecting channel and a comprehensive pipe gallery tunnel, wherein the outlet well comprises a first opening and a second opening, the first opening is arranged at the upper end of the outlet well and communicated with the ground, and the second opening is arranged on the outlet well; a third opening is arranged on the comprehensive pipe rack tunnel; one end of the connecting channel is communicated with the second opening, the other end of the connecting channel is communicated with the third opening, and the outlet well, the connecting channel and the comprehensive pipe gallery tunnel are sequentially communicated to form a through outlet channel. The not enough of this structure is, if utility tunnel's buried depth is great, under the great condition of length of outlet from the top down extension, outlet dado structure and secondary lining structure have fairly big weight, and the outlet lower extreme is when hanging, can't bear so big weight, the steadiness and the life of structure have the problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be, in old district or be not convenient for adopt the big excavation mode to execute and do the region that utility tunnel pipeline drawn forth a mouthful passageway, when needing to draw forth the outlet from the utility tunnel of big buried depth, ensure pipeline outlet structure's steadiness.

The utility model provides a non-excavation formula utility tunnel outlet structure, including piping lane standard section, from the cross passage that the piping lane standard section was drawn forth and communicate to the outlet on ground from this cross passage top the cross passage is equipped with stiffening beam 5 with the outlet junction, and settle a plurality of slip casting anchor pipes between outlet dado and the soil.

The utility model discloses a pipeline outlet structure, the utility model is particularly useful for using in the utility tunnel construction project of current urban area and the pipeline corridor transformation project of old district.

Drawings

Fig. 1 is a cross-sectional view of a pipeline outlet structure according to the present invention;

fig. 2 and 3 show two embodiments of the reinforcing beam structure, respectively. The reference symbols in the figure are:

the structure comprises a standard section 1, a transverse channel 2, a wire outlet 3, a reinforcing beam 5, a prefabricated cover plate at the top of the wire outlet 7, a dado top ring beam 8, a grouting anchor pipe 9, a standard section secondary lining structure 11, a waterproof layer 12, a standard section primary supporting structure 13, a transverse channel secondary lining structure 21, a transverse channel primary supporting structure 23, a wire outlet dado structure 35 and a wire outlet secondary lining structure 36.

Detailed Description

The embodiments of the invention are described in detail below, but the invention can be implemented in many different ways, which are defined and covered by the claims.

Referring to fig. 1, the trenchless utility tunnel outlet structure shown includes a standard pipe gallery section 1, a cross channel 2 and an outlet 3. The transverse channel 2 is led out from the standard section of the pipe gallery, the other end of the transverse channel is communicated with the wire outlet 3, and the wire outlet 3 is communicated to the ground from the top of the transverse channel 2. The utility model discloses in, be equipped with stiffening beam 5 in cross passageway 2 and 3 junctions of outlet. In one embodiment, the reinforcement beam is formed by cast-in-place, and fig. 2 and 3 show cross-sectional views of two cast-in-place reinforcement beams, the reinforcement beam 5 being formed by a neck 52 and a support plate 51, the support plate having a hole 53 in the middle, the neck 52 extending up and down around the hole 53, the hole having an inner diameter corresponding to the inner diameter of the outlet. The support plate 51 extends into the foundation and the neck 52 is used to support the retaining wall structure and the secondary lining structure of the outlet. By means of the stiffening beam, the resistance to the outlet structure is greatly increased, allowing the depth of the outlet to be of a large value, for example 3-5 meters or even deeper. Under the limited condition table in old district shallow layer underground space, need to secretly dig darker utility tunnel and cross passage, this kind of outlet that sets up to the degree of depth provides reliable guarantee.

The utility model discloses in, the cross passage height can design as required, can be for 2 ~ 3 meters usually, and the diameter of outlet is 1-2 meters, for example 1~ 1.5 meters. The diameter can be as small as possible, as construction operations allow, so that the space requirement on the ground is relatively low.

In another preferred embodiment of the present invention, a plurality of grouting anchor pipes 9 are inserted obliquely into the peripheral wall of the outlet. Preferably, one section of the grouting anchor pipe 9 is embedded in the retaining wall 35 of the outlet, and the other end is inserted into the surrounding foundation obliquely and downwards. The grouting anchor pipe is a hollow steel flower pipe, concrete mortar is poured into the hollow part, and the binding force between the grouting anchor pipe and the foundation is increased. An alternative is to use solid steel bars directly. The use of the anchor tubes 9 further enhances the structural integrity of the outlet or reduces the load on the reinforcing beam.

In other preferred aspects of the invention, as shown in figure 1, the walls of the cross channel 2 and the standard section of the pipe gallery are provided with

primary support structures

13, 23, and secondary

primary masonry structures

11, 21. A waterproof layer 12 is arranged between the primary supporting structure and the secondary primary building structure. The outlet 3 is also provided with a secondary lining structure 36. The top of the outlet is provided with a prefabricated cover plate 7. The junction of the outlet and the ground is provided with a retaining wall top ring beam 8.

In a specific embodiment of the present invention, the pipeline outlet structure of the trenchless utility tunnel is constructed by the following method, which includes:

step S1, carrying out primary support on the standard section 1 of the pipe gallery;

step S2, constructing the side wall on the inner side of the primary support to form a primary support structure of the transverse passage;

step S3, after the construction of the primary support structure of the transverse channel is completed, constructing a wire outlet retaining wall structure on the ground above the primary support structure of the transverse channel to the top of the primary support structure of the transverse channel;

step S4, constructing a standard section of the comprehensive pipe gallery and a transverse channel waterproof layer, and constructing a secondary lining structure and a reinforcing beam at the joint of the wire outlet and the transverse channel after the waterproof layer is finished (two ends of the beam are supported on a straight wall section secondarily lined by the transverse channel);

step S5, constructing a secondary lining structure of the outlet when the concrete strength of the secondary lining structure and a reinforcing beam at the joint of the outlet and the transverse channel is not less than 85%;

and step S6, after the concrete strength of the outlet and the secondary lining structure reaches 100%, prefabricating a cover plate on the top of the secondary lining structure of the outlet and backfilling soil to the design standard.

After the steps are completed, an underground space for municipal pipelines to enter and exit is formed by the standard section structure of the underground comprehensive pipe gallery, the transverse channel and the wire outlet structure.

The method is simple and easy to implement, short in construction period, small in occupied ground space during construction, and particularly suitable for being applied to corridor transformation of old and old urban municipal pipelines. In the excavation process, an auxiliary stratum reinforcing technology can be adopted according to the requirements of the surrounding environment, so that the excavated channel structure is stable, and the disturbance to the ground is small. After a certain period of time, the stability of the transverse channel structure and the wire outlet structure is better than that of the prior art in the later use process.

The present invention is only a preferred embodiment, and is not limited to the present invention, and various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, 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. The utility model provides a non-excavation formula utility tunnel outlet structure, includes piping lane standard section (1), from horizontal passageway (2) that the piping lane standard section was drawn forth and from this horizontal passageway top to outlet (3) to ground, characterized in that, be equipped with stiffening beam (5) in horizontal passageway (2) and outlet (3) junction to settle a plurality of slip casting anchor pipes (9) between outlet dado and soil.

2. The trenchless utility tunnel outlet structure of claim 1 wherein the cross passage (2) and standard section (1) are of composite lining construction, with primary support and secondary primary structure.

3. The trenchless utility tunnel outlet structure of claim 2 wherein a waterproof layer is disposed between the primary support structure and the secondary primary structure.

4. The trenchless utility tunnel outlet structure of claim 3 wherein the outlet is also provided with a secondary lining structure.

5. The trenchless utility tunnel outlet structure of claim 1, wherein the cross channel height is 2-3 meters and the diameter of the outlet is 1-2 meters.

6. The trenchless utility tunnel outlet structure of claim 5, wherein the outlet is provided with a prefabricated cover plate (7) on top and is positioned 0.5-1.0 m below the ground.

7. The trenchless utility tunnel outlet structure of claim 1 wherein a retaining wall top ring beam (8) is provided at the intersection of the outlet with the ground.

8. The trenchless utility tunnel outlet structure of claim 1 wherein the reinforcement beam (5) is formed of a neck (52) and a support plate (51) having a hole (53) formed in the middle thereof, the neck (52) extending up and down around the hole (53) and having an inner diameter comparable to the outlet.