CN217590191U - Large-span subway foundation pit cable trench suspends normal position protection architecture in midair - Google Patents

Abstract

The utility model relates to a large-span subway foundation ditch cable pit suspends normal position protection architecture in midair, including two guan liang on being located cable pit below envelope, be equipped with a pair of concrete base that is located the cable pit both sides on every guanliang respectively, the bailey roof beam that vertically is parallel and the level arrangement with the cable pit is set up to two concrete base tops of cable pit homonymy, and both sides bailey roof beam is connected with a plurality of along the continuous beam of longitudinal separation range, and continuous beam both ends are passed through U type bolt lock solid on the last chord member of bailey roof beam, and every continuous beam welding has the frame that suspends in midair that is used for holding up the cable pit, suspend the frame in midair and constitute by two vertically jibs and bottom end rail, and two jib upper ends are connected with continuous beam, and the lower extreme is connected with the bottom end rail, and the bottom end rail is located the cable pit downside. The utility model discloses an erect the bailey roof beam between foundation ditch crown beam to the mode that sets up the bracket on the bailey roof beam suspends the cable pit in midair, has both avoided the cable to move to change, has protected the cable, construction convenient operation.

Description

Large-span subway foundation pit cable trench suspends normal position protection architecture in midair

Technical Field

The utility model relates to a subway foundation ditch cable pit construction technical field, especially a home position protection architecture is suspended in midair in large-span subway foundation ditch cable pit.

Background

The urban subway station is generally located on an urban main road, the construction auxiliary structure relates to the surrounding plots of the main road, various pipelines are inevitably required to be moved and changed in the construction process, and the various pipelines are required to be moved and changed in advance or temporarily protected so as to meet the subway construction conditions. High-voltage or ultra-high-voltage cables such as 110kV in cities are subjected to large-area power supply tasks in cities, and the examination and approval procedures and the cost related to the movement and the change are large, so that the movement and the change are difficult generally. For protecting the large-span foundation pit and the large-scale cable duct, the lattice column support is arranged in the foundation pit for protection in the past, but the lattice column support easily influences lower excavation and structural construction, and the lattice column support is also involved for treatment after the later structural construction is finished. Some of the building enclosure concrete supports are used for replacing Bailey beams, but the stress of a pipeline bracket needs to be considered when the building enclosure is designed, and the building enclosure belongs to main structure engineering and is often designed for different design houses and is difficult to keep consistent because pipeline protection (migration and modification) belongs to early-stage engineering; if the concrete support replaces the stress of the Bailey beam, the support stress can be increased in the process of excavating the foundation pit, and certain risk exists.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a construction convenient operation saves the engineering investment, and the normal position protection architecture is suspended in midair to large-span subway foundation ditch cable pit that the practicality is strong.

The utility model discloses a following scheme realizes: the utility model provides a large-span subway foundation ditch cable pit suspends in midair normal position protection architecture, is equipped with a pair of concrete base that is located the cable pit both sides respectively including two crown beams that are located cable pit below envelope, on every crown beam, has set up the bailey roof beam with the vertical parallel of cable pit and horizontal arrangement in two concrete base tops of cable pit homonymy, and both sides bailey roof beam is connected with a plurality of along the tie beam of longitudinal separation range, the tie beam both ends are through U type bolt lock solid on the upper chord of bailey roof beam, and every tie beam welding has the suspension frame that is used for holding up the cable pit, the suspension frame comprises two vertically jibs and bottom end rail, and two jib upper ends are connected with the tie beam, and the lower extreme is connected with the bottom rail, and the bottom rail is located the cable pit downside.

Furthermore, the concrete base is formed by casting stone concrete, the transverse width of the concrete base is 1.5m, and the longitudinal width of the concrete base is consistent with that of the crown beam.

Furthermore, the Bailey beams are single-layer three-row Bailey beams, each section of the standard section is 3m long, and the total length is 21m.

Furthermore, the connecting beam adopts 20a channel steel, and the distance is 0.5m.

Furthermore, the hanger rods and the lower cross beam are both 20a channel steel.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses an erect bailey roof beam between foundation ditch crown beam to the mode that sets up the bracket on bailey roof beam suspends the cable pit in midair, has both avoided the cable to move to change, has protected the cable, and construction convenient operation does not influence foundation ditch excavation and structure construction yet, does not produce the problem that similar bailey roof beam invades the structure roof, and material recycle, has saved the engineering investment, and the practicality is strong, has certain popularization nature.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.

Drawings

Fig. 1 is a top view of a suspension in-situ protection structure according to an embodiment of the present invention;

fig. 2 is a front view of the suspension in-situ protection structure according to the embodiment of the present invention;

fig. 3 is a side view of a suspension in-situ protection structure according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view at A in FIG. 2;

FIG. 5 is an enlarged schematic view at B in FIG. 2;

FIG. 6 is an enlarged schematic view at C of FIG. 3;

FIG. 7 is a left side view of FIG. 6;

the reference numbers in the figures illustrate: 1-enclosure structure, 2-crown beam, 3-concrete base, 4-Bailey beam, 5-connecting beam, 6-U-shaped bolt, 7-suspender, 8-lower beam and 10-cable trench.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 to 7, the large-span subway foundation pit cable trench suspension in-situ protection structure comprises two crown beams 2 located on an enclosure structure 1 below a cable trench, each crown beam is provided with a pair of concrete bases 3 located on two sides of the cable trench, a bailey beam 4 longitudinally parallel to and horizontally arranged with the cable trench is erected above the two concrete bases on the same side of the cable trench, the bailey beams on the two sides are connected with a plurality of connecting beams 5 longitudinally arranged at intervals, two ends of each connecting beam are locked on an upper chord beam of the bailey beam through U-shaped bolts 6, the connecting beams are horizontally and centrally fixed on the upper portion of the upper chord beam of the bailey beam, each connecting beam is welded with a suspension frame for supporting the cable trench, each suspension frame is composed of two vertical suspension rods 7 and a lower cross beam 8, the upper ends of the two suspension rods are connected with the connecting beam, the lower ends of the two suspension rods are connected with the lower cross beam, the lower cross beam is located on the lower side of the cable trench, and the lower cross beam supports the 110kV cable trench. The utility model discloses an erect bailey roof beam between foundation ditch crown beam to the mode that sets up the bracket on bailey roof beam suspends the cable pit in midair, has both avoided the cable to move to change, has protected the cable, construction convenient operation does not influence foundation ditch excavation and structure construction yet, and bailey roof beam is through checking out calculation back intensity, the disturbance meets the demands, does not produce the problem that similar bailey roof beam invades the structure roof, and material recycle, has saved the engineering investment, and the practicality is strong, has certain popularization nature.

In the embodiment, the concrete base is formed by casting stone slab concrete, is 1.5m wide in the transverse direction and is consistent with the width of the crown beam in the longitudinal direction.

In this embodiment, the beret beam is a single-layer three-row beret beam, each section of the standard knot is 3m long, and the total length is 21m.

In this embodiment, the tie beam is a 20a channel steel with a spacing of 0.5m.

In this embodiment, the hanger rod and the lower beam are made of 20a channel steel, and the hanger rod, the upper connecting beam and the lower beam are all welded in a surrounding manner to ensure firm welding.

In this embodiment, the U-shaped bolt is a specially-made U-shaped bolt on a horse and is locked with the upper chord of the bailey beam, and two sections of the U-shaped bolt are respectively 10cm longer than the bailey beam; the U-shaped bolt on the horse is a standard M20 size U-shaped bolt, the performance grade is 10.9S, and the anti-sliding coefficient of the friction surface is 0.45.

The utility model discloses in situ protection structure's work progress is suspended in midair in large-span subway foundation ditch cable pit:

(1) Constructing a crown beam of the enclosure structure, pouring C30 pieces of stone concrete on the crown beam to form a concrete base as a base of the Bailey beam, wherein the transverse width of the base is 1.5m, the longitudinal width of the base is consistent with that of the crown beam, and the elevation and flatness control needs to be paid attention to in the pouring process;

(2) Carrying out Bailey beam stress calculation in advance, determining two groups of Bailey beam parameters, and preassembling two groups of Bailey beams on the site;

(3) After the concrete base on the crown beam meets the strength requirement, two groups of Bailey beams are installed and are longitudinally parallel to the cable trench;

(4) Digging 0.3M multiplied by 0.3M square holes in soil mass at the bottom of the cable trench every 0.5M, respectively widening the cable trench sides by 100mm at two sides, manually inserting 20a channel steel into the square holes to serve as a lower cross beam, installing a connecting beam corresponding to the upper chord beam of the Bailey beam, and fixing the upper chord beam and the connecting beam by using U-shaped bolts with standard M20 size as U-shaped bolts;

(5) And (3) connecting the connecting beam with the lower cross bar by using a 20a channel steel as a hanging rod, supporting the cable trench by using the lower cross bar, and performing girth welding between the hanging rod and the connecting beam as well as between the hanging rod and the lower cross bar.

The Bailey beams are erected between the top beams of the foundation pit, and the cable trench is suspended in a manner of arranging the brackets on the Bailey beams, so that the cables are prevented from being changed and protected, the foundation pit excavation is not influenced, the problem that similar Bailey beams invade a structural top plate is not caused, materials can be recycled, and the engineering investment is saved.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effects which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using a bolt or screw connection) can also be understood as: non-detachable fixed connections (e.g. riveting, welding) can, of course, also be replaced by one-piece structures (e.g. manufactured in one piece using a casting process) (unless it is obvious that one-piece processes cannot be used).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.

The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims (5)

1. The utility model provides a large-span subway foundation ditch cable pit suspends normal position protection architecture in midair which characterized in that: including being located two crown beams on the envelope of cable pit below, be equipped with a pair of concrete foundation who is located the cable pit both sides on every crown beam respectively, set up the bailey roof beam of vertical parallel and horizontal arrangement with the cable pit above two concrete foundation of cable pit homonymy, the bailey roof beam in both sides is connected with a plurality of and follows the even tie beam of longitudinal interval arrangement, even tie beam both ends are through U type bolt lock solid on the upper chord roof beam of bailey roof beam, and every even tie beam welding has the suspension frame who is used for holding up the cable pit, suspension frame comprises two vertically jib and bottom end rail, and two jib upper ends are connected with even tie beam, and the lower extreme is connected with the bottom end rail, and the bottom end rail is located the cable pit downside.

2. The large-span subway foundation pit cable trench suspension in-situ protection structure of claim 1, characterized in that: the concrete base is formed by pouring rubble concrete, the transverse width of the concrete base is 1.5m, and the longitudinal width of the concrete base is consistent with that of the crown beam.

3. The large-span subway foundation pit cable trench suspension in-situ protection structure of claim 1, characterized in that: the Bailey beams are single-layer three-row Bailey beams, each section of the standard section is 3m long, and the total length of the standard section is 21m.

4. The large-span subway foundation pit cable trench suspension in-situ protection structure of claim 1, characterized in that: the connecting beam adopts 20a channel steel, and the distance is 0.5m.

5. The large-span subway foundation pit cable trench suspension in-situ protection structure of claim 1, characterized in that: the hanger rods and the lower cross beam are both 20a channel steel.

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