CN216922121U

CN216922121U - Shield machine receiving device under condition of no bottom plate of overlapped tunnel

Info

Publication number: CN216922121U
Application number: CN202122917969.3U
Authority: CN
Inventors: 徐程; 王飞; 黄哲; 刘波; 李福成; 巴飞飞; 李文广; 苟志健; 黄飞; 荣延昌
Original assignee: China Construction Tietou Rail Transit Construction Co ltd; China State Railway Investment Construction Group Co Ltd
Current assignee: China Construction Tietou Rail Transit Construction Co ltd; China State Railway Investment Construction Group Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-07-08
Anticipated expiration: 2031-11-25

Abstract

The utility model discloses a shield machine receiving device under the condition of no bottom plate of an overlapped tunnel, which comprises a conventional shield machine receiving bracket, wherein a supporting upright post assembly is arranged at the bottom of the shield machine receiving bracket, an embedded foundation assembly is arranged at the bottom of the supporting upright post assembly, and a reinforcing assembly is arranged between the supporting upright post assemblies; according to the utility model, under the condition that the receiving tunnel portal of the overlapped tunnel does not have a bottom plate, a receiving device of the shield machine is realized, the steel upright posts are mutually welded and fixed by adopting an I-steel connecting system, so that the steel upright posts are ensured to form a whole body, the stability is higher, the receiving bracket adopts angle steel welding as an anti-slip stop block, the shield machine is prevented from sliding, and the safety of shield receiving is ensured; meanwhile, the receiving device has a good construction and application effect, can avoid the risk that the post-cast plate of the station cannot be constructed in time or the rigid support at the lower part is difficult to remove after construction, and has the advantages of good forming quality, strong bearing capacity, simplicity in operation, good economic benefit and the like.

Description

Shield machine receiving device under condition of no bottom plate of overlapped tunnel

Technical Field

The utility model relates to the field of shield machine receiving, in particular to a shield machine receiving device under the condition that an overlapped tunnel has no bottom plate.

Background

The conventional interval tunnel shield tunneling machine exits from the tunnel, and after the structural strength of the shield shaft bottom plate of the subway station is achieved, the shield tunneling machine receiving bracket is directly placed on a concrete structure and fixed, and then the shield tunneling machine exits from the tunnel and is received. The conventional station usually mainly adopts a sequential construction method, so the shield shaft floor can be constructed in the early stage, the shield construction requirements are met, and the construction period is loose.

However, with the continuous development of urban rail transit construction in China, urban traffic lines are gradually connected in a refined mode, underground space line planning becomes more and more compact, and the design of overlapped tunnels will be more and more, so that the upper layer of tunnels do not have a bottom plate for receiving the shield machine according to the design conditions of stations. For the shield machine receiving of the upper layer tunnel, at present, it is rare in China, and because of the large height difference with the bottom plate, one of the feasible methods is to pour and seal a middle plate shield wellhead (hereinafter referred to as a "post-cast plate") of a station by high-strength concrete, and install a rigid support (or concrete support) between the post-cast plate and the bottom plate of the station shield well for the shield machine gravity transmission during shield receiving, and through the structural stress checking calculation, the structural form with reasonable design can achieve the shield receiving purpose. However, the construction time of the station structure is short, the construction period is short, the post-cast plate is constructed late, the shield tunneling period is delayed, and then if the station post-cast plate is cast in advance, the space between the bottom plate and the post-cast plate is narrow, the difficulty in later-stage dismantling of the rigid support is large, and the construction risk is high.

However, in the construction process of the urban subway station, due to the influence of early engineering and other external factors, the construction time of the main structure of the station is short, the construction of the post-cast slab is late, the construction period is short, and the delay of the shield tunneling period is easily caused. Particularly, when an underground three-layer island type station is constructed, the engineering quantity is larger than that of a common underground two-layer station, and the receiving condition of the negative two-layer shield cannot be provided on time, namely the construction of a medium plate concrete structure at the receiving well of the negative two-layer shield cannot be completed. Secondly, if the construction conditions of the station allow, the post-cast plate can be poured in advance to meet the requirements of shield receiving nodes, but the space between the bottom plate and the post-cast plate is narrow, the difficulty in rigid support (the support length is generally 12-15m) removal in a closed narrow closed space is very high, and the construction risk coefficient is very high.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: a shield machine receiving device under the condition that an overlapped tunnel has no bottom plate comprises a conventional shield machine receiving bracket, wherein a supporting upright post assembly is arranged at the bottom of the shield machine receiving bracket, a pre-buried foundation assembly is arranged at the bottom of the supporting upright post assembly, and a reinforcing assembly is arranged between the supporting upright post assemblies;

the supporting upright post assembly comprises a plurality of supporting upright posts, the supporting upright posts are arranged in a longitudinal row a and a transverse row b, the embedded foundation assembly comprises embedded steel plates corresponding to the number of the supporting upright posts, the tops of the embedded steel plates are welded and fixed with the bottoms of the supporting upright posts, and tree root embedded steel bars are arranged downwards at the bottoms of the embedded steel plates; the reinforcing component comprises a plurality of first horizontal rod pieces and first oblique rod pieces which are longitudinally arranged between every two adjacent supporting upright columns in each row, and a plurality of second horizontal rod pieces and second oblique rod pieces which are longitudinally and transversely arranged between every two adjacent supporting upright columns in each row; the supporting column top has longitudinal connection steel, transverse connection steel according to vertical, transverse connection steel one end withstands tunnel station medium plate structure section, and the other end supports tunnel station end side wall face, longitudinal connection steel, transverse connection steel top set up the loading board, the shield constructs quick-witted receiving bracket and sets up in loading board upper portion.

Furthermore, the first horizontal rod pieces are arranged in three rows from top to bottom, and two ends of the first horizontal rod pieces which correspond to the adjacent rows from top to bottom are connected through two first inclined rod pieces which are arranged in a crossed mode.

Further, the second horizontal rod pieces are arranged in five rows from top to bottom, wherein two ends of the second uppermost row of horizontal rod pieces and two ends of the second lowermost row of horizontal rod pieces are connected through two oblique rod pieces arranged in a crossed manner.

Further, the quantity of support post is 12, and it adopts mode range 3 vertical rows, horizontal 4 rows to arrange, the same also 12 of pre-buried steel sheet quantity and support post quantity, the embedded steel bar is 9, and every embedded steel bar all is L shape.

Furthermore, the side part of the receiving bracket is connected with the side wall of the tunnel station through a first connecting steel, the front end of the receiving bracket is connected with the side wall of the end of the tunnel station through a second connecting steel, and the rear end of the receiving bracket is connected with the middle plate of the tunnel station through a third connecting steel.

Furthermore, the number of the first connecting steel and the third connecting steel of the shield tunneling machine is 8, and the number of the second connecting steel is 6.

Furthermore, the bottom of the receiving bracket of the shield tunneling machine is connected with the bearing plate through angle steel.

Further, the first connecting steel, the second connecting steel and the third connecting steel are 45a I-shaped steel.

Further, the longitudinal connecting steel and the transverse connecting steel are 45a I-shaped steel, and the first horizontal rod piece, the first oblique rod piece, the second horizontal rod piece and the second oblique rod piece are 20a I-shaped steel.

After the scheme is adopted, the utility model has the following advantages: according to the receiving device of the shield machine, under the condition that the receiving tunnel portal of the overlapped tunnel does not have a bottom plate, a connecting system formed by I-shaped steel interactive welding and fixing is adopted between the supporting stand columns, so that the supporting stand columns are integrally formed, the stability is higher, the receiving bracket adopts angle steel welding as an anti-slip stop block, the shield machine is prevented from sliding, and the safety of shield receiving is ensured; meanwhile, the receiving device has a good construction and application effect, can avoid the risk that the post-cast plate of the station cannot be constructed in time or the lower rigid support is difficult to remove after construction, and has the advantages of good forming quality, strong bearing capacity, simplicity in operation, good economic benefit and the like; along with the continuous acceleration of the construction pace of urban subway tunnel engineering, the frequent emergence of the overlapping tunnel construction phenomenon, and the similar working conditions can be more and more, the utility model has wider social and economic benefits

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a shield machine receiving device under the condition that an overlapped tunnel has no bottom plate.

Fig. 2 is a schematic longitudinal structure diagram of a shield machine receiving device under the condition that the overlapped tunnel has no bottom plate.

Fig. 3 is a schematic transverse structure diagram of a shield machine receiving device under the condition that the overlapped tunnel has no bottom plate.

Fig. 4 is a schematic structural diagram of top connection steel in a shield machine receiving device under the condition that no bottom plate exists in an overlapped tunnel.

Fig. 5 is a schematic structural diagram of a shield machine bracket in a shield machine receiving device under the condition that no bottom plate exists in an overlapped tunnel.

Fig. 6 is a schematic structural diagram of a pre-buried foundation assembly in the shield machine receiving device under the condition that the overlapped tunnel has no bottom plate.

Fig. 7 is a schematic structural diagram of transverse connection steel in a shield machine receiving device under the condition that no bottom plate exists in an overlapped tunnel.

Fig. 8 is a structural schematic diagram of longitudinal connection steel in a shield machine receiving device under the condition that the overlapped tunnel has no bottom plate.

Fig. 9 is a schematic diagram of the connection effect between the shield machine bracket and the side wall in the shield machine receiving device under the condition that the overlapped tunnel has no bottom plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, or an orientation or a positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience and simplicity, and the indication or the suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, the present invention should not be construed as being limited. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" represents at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

The embodiment provides a receiving device of a shield machine, which is characterized in that a receiving platform is built by utilizing a support upright post, and a shield receiving bracket is fixedly arranged on the platform, so that the effect similar to that of receiving of a conventional shield tunnel exit bottom plate is achieved, and the exit integral receiving of the shield machine of an upper layer tunnel of an overlapped tunnel is carried out; with reference to the attached drawing 1, the shield tunneling machine specifically comprises a pre-buried foundation assembly 1, a supporting upright post assembly 2 arranged at the upper part of the pre-buried foundation assembly 1, a conventional shield tunneling machine receiving bracket 3 arranged at the top of the supporting upright post assembly 2 and a reinforcing assembly 4 arranged between the supporting upright post assemblies 2;

the supporting upright post assembly 2 comprises a plurality of supporting upright posts 201, the supporting upright posts 201 are arranged in a longitudinal row a and a transverse row b, in the embodiment, the number of the supporting upright posts 201 is 12, and the supporting upright posts are arranged in a longitudinal row 3 and a transverse row 4 (the supporting upright posts are longitudinal along the direction of the hole body, and the cross section of the hole body is transverse); the reinforcing component 4 comprises a plurality of first horizontal rods 401 and a plurality of first oblique rods 402 which are longitudinally arranged between every two adjacent support columns in each row, and a plurality of second horizontal rods 403 and a plurality of second oblique rods 404 which are longitudinally and transversely arranged between every two adjacent support columns in each row; with reference to fig. 2 and fig. 3, in this embodiment, the first horizontal rod members 401 are arranged in three rows from top to bottom, two ends of the first horizontal rod members 401 corresponding to the adjacent rows from top to bottom are connected by two oblique rod members 402 arranged in an intersecting manner, the second horizontal rod members 403 are arranged in five rows from top to bottom, two ends of the two uppermost rows of horizontal rod members 403 and two ends of the two lowermost rows of horizontal rod members 403 are connected by two oblique rod members 404 arranged in an intersecting manner, with reference to fig. 7, fig. 8 and fig. 9, the tops of the supporting columns 201 are longitudinally and transversely connected with longitudinal connecting steel 5 and transverse connecting steel 6, one end of the longitudinal connecting steel 5 abuts against a structural section of a middle plate in a tunnel station, and the other end abuts against a side wall surface of a tunnel station end.

The longitudinal connecting steel 5 and the transverse connecting steel are 45a I-shaped steel, and the first horizontal rod piece 401, the first oblique rod piece 402, the second horizontal rod piece 403 and the second oblique rod piece 404 are 20a I-shaped steel; in this embodiment, the longitudinal connecting steel 6 above the 12 supporting columns 201 adopts 6 transverse h-beams of 45a of 12m, wherein 2 are 1 group to carry out double splicing, connect 4 longitudinal supporting columns 201, the left end of the double-spliced h-beam withstands the station structure middle plate, the right end withstands the end side wall, simultaneously adopt 8 longitudinal h-beams of 45a of 1.36m, 2 are a group of transverse 3 columns of connection.

With reference to fig. 6, the embedded foundation assembly 1 includes embedded steel plates 101 corresponding to the number of the support columns 201, the tops of the embedded steel plates 101 are welded and fixed to the bottoms of the support columns 201, and the bottoms of the embedded steel plates are provided with tree root embedded steel bars 102 downward; the same also is 12 with support post quantity of pre-buried steel sheet 101 quantity, pre-buried reinforcing bar 102 is 9, every pre-buried reinforcing bar 102 all is L shape, pre-buried steel sheet thickness sets up 20mm, the area is 1 mx 1m, it is pre-buried at the particular position in advance when station bottom plate concrete placement, guarantee that the steel sheet upper surface is in same elevation, the pre-buried reinforcing bar that every pre-buried steel sheet bottom set up is 9, length is 800+100mm, distribute according to 3 x 3 at pre-buried steel sheet lower surface, interval 400 mm.

The top of the longitudinal connecting steel 5 and the top of the transverse connecting steel 6 are provided with bearing plates 7, the bearing plates 7 are 20mm thick steel plates fully paved on the top of the longitudinal connecting steel 5, the paving range of the steel plates is the same as the size of a reserved well, the shield machine receiving bracket 3 is arranged on the upper part of the bearing plates 7, the shield machine receiving bracket 3 is a conventional shield receiving bracket and is connected with the bearing plates through angle steel 9, and the shield machine receiving bracket 3 determines the installation position according to the actually measured door position and the designed tunnel axis; 4 parts of the front end and the rear end of the receiving bracket 3 of the shield tunneling machine and the middle plate structure are respectively selected and supported by 45a I-shaped steel, 6I-shaped steel pieces are respectively selected and mounted between the two sides of the receiving bracket and the main body structure and fixed, and the I-shaped steel fixing positions are symmetrical.

First, specific case

The number line of a Shenzhen city subway 9 is towards a region from a west village station to a Wen jin station, the distance between the left line and the origin-destination mile of the region is 498.56m, the hole outlet of the left line is towards the west village station, the west village station is a transfer station, and the shield tunnel door and the bottom plate of the transfer section have a height difference; in order to receive construction when the shield arrives, a shield receiving device needs to be set up for shield receiving; the size of a preformed hole of the shield receiving end well is 11.5 multiplied by 7.5m, an underground continuous wall is used for the enclosure of the main structure, and the thickness of the underground continuous wall is 1000 mm. The diameter of the shield tunneling machine entering the hole is phi 6340; the length of the host machine of the shield machine is 8650mm, and the length of the cutter head is 1650 mm. The self weight of the handpiece is 320T. And combining field conditions, the west village station is a transfer station, and the height difference between the bottom of the shield tunnel portal of the left line and the bottom plate surface is 8.337 m. In order to create a receiving condition for shield construction, a device is required to be erected in an end well of a western village station; if a shield receiving platform (length, width and height are 11.5m multiplied by 7.5m multiplied by 8.337m), the shield receiving platform needs to be erected in advance for one month, a shield receiving bracket is installed, and after the shield machine reaches the west village station, the shield machine is disassembled and hoisted out of the shield machine head.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should be able to conceive of the present invention without creative design of the similar structural modes and embodiments without departing from the spirit of the present invention, and all such modifications should fall within the protection scope of the present invention.

Claims

1. A shield machine receiving device under the condition that an overlapped tunnel has no bottom plate comprises a conventional shield machine receiving bracket and is characterized in that a supporting stand column assembly is arranged at the bottom of the shield machine receiving bracket, a pre-buried foundation assembly is arranged at the bottom of the supporting stand column assembly, and a reinforcing assembly is arranged between the supporting stand column assemblies;

the supporting upright post assembly comprises a plurality of supporting upright posts, the supporting upright posts are arranged in a longitudinal row a and a transverse row b, the embedded foundation assembly comprises embedded steel plates corresponding to the number of the supporting upright posts, the tops of the embedded steel plates are welded and fixed with the bottoms of the supporting upright posts, and tree root embedded steel bars are arranged downwards at the bottoms of the embedded steel plates; the reinforcing component comprises a plurality of first horizontal rod pieces and first oblique rod pieces which are longitudinally arranged between every two adjacent supporting upright columns in each row, and a plurality of second horizontal rod pieces and second oblique rod pieces which are longitudinally and transversely arranged between every two adjacent supporting upright columns in each row; the supporting upright post top has longitudinal connection steel, transverse connection steel according to vertical, transverse connection, longitudinal connection steel one end withstands tunnel station medium plate structure section, and the other end supports tunnel station end side wall face, longitudinal connection steel, transverse connection steel top set up the loading board, shield constructs quick-witted receiving bracket and sets up in loading board upper portion.

2. The shield machine receiving device under the condition of no bottom plate of the overlapped tunnel according to claim 1, wherein the first horizontal rod pieces are arranged in three rows from top to bottom, and two ends of the first horizontal rod pieces corresponding to the upper and lower ends of the adjacent rows are connected through the first inclined rod pieces which are arranged in a crossed manner.

3. The shield machine receiving device for the bottomless condition of the overlapped tunnel according to claim 1, wherein the second horizontal rod members are arranged in five rows from top to bottom, and two ends of the second horizontal rod members in the uppermost two rows and two ends of the second horizontal rod members in the lowermost two rows are connected through two second diagonal rod members which are arranged in a crossed manner.

4. The shield tunneling machine receiving device under the condition of no bottom plate in the overlapped tunnel according to claim 1, wherein the number of the support columns is 12, the support columns are arranged in a mode of 3 rows in the longitudinal direction and 4 rows in the transverse direction, the number of the embedded steel plates is 12 as large as that of the support columns, the number of the embedded steel bars is 9, and each embedded steel bar is L-shaped.

5. The shield machine receiving device under the condition that the overlapped tunnel has no bottom plate as claimed in claim 1, wherein the side portion of the receiving bracket is connected with the side wall of the tunnel station through a first connecting steel, the front end of the receiving bracket is connected with the side wall of the end of the tunnel station through a second connecting steel, and the rear end of the receiving bracket is connected with the middle plate of the station through a third connecting steel.

6. The shield tunneling machine receiving device under the condition that the overlapped tunnel has no bottom plate, according to claim 5, wherein the number of the first connecting steel and the third connecting steel of the shield tunneling machine is 4, and the number of the second connecting steel is 6.

7. The shield machine receiving device under the condition that the overlapped tunnel is not provided with the bottom plate as claimed in claim 1, wherein the bottom of the shield machine receiving bracket is connected with the bearing plate through an angle steel.

8. The shield tunneling machine receiving device under the condition that the overlapped tunnel is not provided with the bottom plate, according to claim 1, wherein the first connecting steel, the second connecting steel and the third connecting steel are all 45a I-shaped steel.

9. The shield tunneling machine receiving device under the condition of no bottom plate of the overlapped tunnel according to claim 1, wherein the longitudinal connecting steel and the transverse connecting steel are 45a I-shaped steel, and the first horizontal rod piece, the first inclined rod piece, the second horizontal rod piece and the second inclined rod piece are 20a I-shaped steel.