阅读说明：本技术 市政沟渠横跨地下车站的结构和施工结构及施工方法 (Structure, construction structure and construction method for municipal ditch crossing underground station ) 是由 杜志涛 农兴中 刘生平 杨海洋 李少友 曹亚博 杜林� 谢凯 郭洋洋 金宾 有智 于 2019-09-26 设计创作，主要内容包括：本发明属于城市轨道交通工程建设技术领域,具体而言,本发明涉及一种市政沟渠横跨地下车站的结构和施工结构及施工方法。在本发明中,市政沟渠横跨地下车站的结构包括市政沟渠、车站盖挖顶板和车站结构；所述市政沟渠横跨所述车站结构,所述车站盖挖顶板位于所述车站结构和所述市政沟渠之间,与所述车站结构一体设置。本发明提供了一种市政沟渠横跨地下车站的结构,同时提供了一种市政沟渠横跨地下车站时的施工结构和施工方法,既可以解决市政沟渠因各种原因不能迁改出原位置的问题,又可以解决市政沟渠与地下车站竖向标高冲突的问题,能够在避免临时迁改市政沟渠且不影响地下车站的工程实施和运营使用,具有结构简单、施工方便、节省投资的特点。(The invention belongs to the technical field of urban rail transit engineering construction, and particularly relates to a structure, a construction structure and a construction method for crossing underground stations in municipal ditches. In the invention, the structure of the municipal ditch crossing the underground station comprises the municipal ditch, a station cover dug top plate and a station structure; the municipal irrigation canals and ditches span the station structure, the station lid digs the roof and is located the station structure with between the municipal irrigation canals and ditches, with the integrative setting of station structure. The invention provides a structure of a municipal ditch crossing an underground station, and simultaneously provides a construction structure and a construction method of the municipal ditch crossing the underground station, which can solve the problem that the municipal ditch cannot be moved to the original position due to various reasons, can solve the problem that the municipal ditch conflicts with the vertical elevation of the underground station, can avoid temporarily moving the municipal ditch and do not influence the engineering implementation and operation use of the underground station, and have the characteristics of simple structure, convenient construction and investment saving.)

1. A structure of a municipal ditch crossing a underground station, comprising:

the municipal ditch (2), the station cover and dug roof (8) and the station structure (7);

the municipal ditch crosses the station structure, and the station cover digger plate is positioned between the station structure and the municipal ditch and is integrally arranged with the station structure; in the cross section perpendicular to municipal irrigation canals and ditches length direction, station lid digs on the roof with municipal irrigation canals and ditches cooperation department is the U type setting.

2. The utility model provides a municipal irrigation canals and ditches span construction structures of underground station, includes municipal irrigation canals and ditches (2) and station structure (7), municipal irrigation canals and ditches span station structure, its characterized in that:

a supporting system is arranged between the municipal ditch and the station structure, and comprises fender posts (1), a crown beam (9), covered and excavated temporary steel columns (3), steel joists (6) and station covered and excavated top plates (8);

the plurality of fender posts are arranged on two sides of the station structure in the length direction, and the crown beam is connected with the tops of the plurality of fender posts;

the cover-excavation temporary steel upright columns (3) are arranged in the station structure and are positioned below the municipal ditch, the steel joists are connected with the tops of the cover-excavation temporary steel upright columns, and the steel joists and the cover-excavation temporary steel upright columns are in one-to-one correspondence;

the station cover digs the roof and is located the municipal irrigation canals and ditches with between the station structure, the station cover digs on the roof with municipal irrigation canals and ditches cooperation department is the U type setting, the station cover digs the roof respectively with the steel joist the hat roof beam links to each other.

3. The construction structure of the municipal ditch across an underground station according to claim 2, wherein the support system further comprises:

the column pile comprises a column pile foundation (4), an inter-column support (5), a first support (10), a second support (11) and a steel surrounding purlin (12);

the upright post foundations are positioned below the station structure and used for providing support for the cover-excavation temporary steel upright posts;

in the length direction of the station structure, the inter-column supports are connected between two adjacent covered and excavated temporary steel upright columns;

the first support and the second support are sequentially arranged from top to bottom in the width direction of the station structure, two ends of the first support and the second support are respectively connected with the fender post through the steel enclosing purlin, and the middle of the first support and the middle of the second support are respectively connected with the cover-excavation temporary steel stand columns.

4. The municipal ditch crossing underground station construction structure according to claim 2, wherein:

the steel joist is fixedly connected with the station cover excavation top plate through a fastening structure, and the fastening structure comprises shear keys (15), U-shaped bolts (16) and embedded steel plates (17);

the U-shaped bolt is embedded in the station cover digging top plate and connected with the embedded steel plate embedded at the bottom of the station cover digging top plate; the shear key is arranged between the embedded steel plate and the station cover excavation top plate; and the U-shaped bolt is in threaded connection with the steel joist.

5. A construction method for crossing an underground station by a municipal ditch is characterized by comprising the following steps:

the method comprises the following steps: carrying out intercepting and drainage guiding treatment on the municipal ditch (2);

step two: constructing a supporting system;

step three: restoring the original line of the municipal ditch;

step four: and constructing a station structure to build a structure of the municipal ditch crossing the underground station.

6. The construction method of the municipal ditch crossing underground station according to claim 5, characterized in that:

in the step one, when the municipal ditch is subjected to intercepting drainage guide treatment, the municipal ditch is cut off, and water in the municipal ditch is naturally guided or pumped by using a pipe bundle.

7. The construction method of the municipal ditch across the underground station according to claim 5, wherein in the second step, the construction of the support system comprises:

firstly, constructing a fender post (1), a crown beam (9), a column pile foundation (4), a covered and excavated temporary steel column (3) and a steel joist (6) in sequence;

then, excavating a foundation pit of a station structure (7), constructing a station cover excavating top plate (8), arranging a U-shaped structure on the station cover excavating top plate and at the intersection of the station cover excavating top plate and the original line of the municipal ditch, and connecting the station cover excavating top plate with the steel joist and the crown beam respectively;

and finally, erecting inter-column supports (5) along with excavation of a foundation pit of the station structure (7), and sequentially erecting a first support (10) and a second support (11), wherein two ends of the first support and the second support are respectively connected with the fender post through a steel purlin (12), and the middle parts of the first support and the second support are respectively connected with the cover-excavation temporary steel stand columns.

8. The construction method of the municipal ditch crossing underground station according to claim 7, characterized in that:

and in the third step, constructing the municipal ditch at the U-shaped structure of the station cover excavation top plate, and recovering the original line of the municipal ditch.

9. The method of claim 7, wherein the step four comprises:

firstly, excavating a foundation pit of the station structure to an elevation, and constructing a foundation pit cushion layer and a bottom plate of the station structure on the foundation of the foundation pit;

then, sequentially removing the second support and constructing a middle plate of the station structure, and removing the first support and constructing a negative layer side wall of the station structure to form a frame system of the station structure;

and finally, sequentially breaking the covered and excavated temporary steel upright columns, removing the supports among the columns and removing the steel joists to complete the construction of the station structure, thereby building a structure of the municipal ditch crossing the underground station.

10. The construction method of the municipal ditch crossing underground station according to claim 5, characterized in that:

and (4) performing the construction of the first step by adopting a chamfering method, and performing the construction of the second step and the construction of the fourth step by adopting a local covering and excavating method.

Technical Field

The invention belongs to the technical field of urban rail transit engineering construction, and particularly relates to a structure, a construction structure and a construction method for crossing underground stations in municipal ditches.

Background

With the continuous development of national economy and the continuous acceleration of urbanization process in China, municipal engineering construction and underground structure development and utilization are paid attention by related units. With the development of underground structures, the situation that municipal ditches cross underground station structures on the same path inevitably occurs.

Under the traditional process, all ditches in the plane range of the underground station need to be moved out before the underground station is implemented, and the ditches are moved back after the construction of the underground station is completed. If the underground station and the ditch collide with each other in the vertical elevation, the ditch is not moved back, and thus, the originally narrow underground space becomes crowded. When municipal ditches conflict with underground stations in elevation, existing treatment methods involve a series of other factors, for example, when underground structures are implemented on the streets with dense urban buildings, the feasibility of the whole scheme is affected by the correct treatment of the municipal ditches. Therefore, in order to better implement the underground station, the problem of conflict between the municipal ditch and the vertical elevation of the underground station is solved at once without influencing the use of the existing municipal ditch, and the municipal ditch does not need to be changed, so that the problem which needs to be solved urgently is solved.

Disclosure of Invention

In order to solve the problems, the invention provides a structure, a construction structure and a construction method for a municipal ditch crossing an underground station, and the technical scheme is as follows:

a structure of a municipal ditch crossing an underground station comprises the municipal ditch, a station cover dug top plate and a station structure; the municipal ditch crosses the station structure, and the station cover digger plate is positioned between the station structure and the municipal ditch and is integrally arranged with the station structure; in the cross section perpendicular to municipal irrigation canals and ditches length direction, station lid digs on the roof with municipal irrigation canals and ditches cooperation department is the U type setting.

A construction structure for a municipal ditch crossing an underground station comprises the municipal ditch and a station structure, wherein the municipal ditch crosses the station structure, a support system is arranged between the municipal ditch and the station structure, and the support system comprises fender posts, crown beams, cover-excavation temporary steel stand columns, steel joists and station cover-excavation top plates; the plurality of fender posts are arranged on two sides of the station structure in the length direction, and the crown beam is connected with the tops of the plurality of fender posts; the cover-excavation temporary steel stand columns are arranged in the station structure and are positioned below the municipal ditch, the steel joists are connected with the tops of the cover-excavation temporary steel stand columns, and the steel joists and the cover-excavation temporary steel stand columns are in one-to-one correspondence; the station cover digs the roof and is located the municipal irrigation canals and ditches with between the station structure, the station cover digs on the roof with municipal irrigation canals and ditches cooperation department is the U type setting, the station cover digs the roof respectively with the steel joist the hat roof beam links to each other.

As above-mentioned municipal irrigation canals and ditches span the construction structures of underground station, further preferred, the support system still includes: the column pile foundation, the column supports, the first support, the second support and the steel purlin are arranged between the columns; the upright post foundations are positioned below the station structure and used for providing support for the cover-excavation temporary steel upright posts; in the length direction of the station structure, the inter-column supports are connected between two adjacent covered and excavated temporary steel upright columns; the first support and the second support are sequentially arranged from top to bottom in the width direction of the station structure, two ends of the first support and the second support are respectively connected with the fender post through the steel enclosing purlin, and the middle of the first support and the middle of the second support are respectively connected with the cover-excavation temporary steel stand columns.

According to the construction structure of the municipal ditch crossing the underground station, preferably, the steel joist is fixedly connected with the station cover excavation top plate through a fastening structure, and the fastening structure comprises shear keys, U-shaped bolts and embedded steel plates; the U-shaped bolt is embedded in the station cover digging top plate and connected with the embedded steel plate embedded at the bottom of the station cover digging top plate; the shear key is arranged between the embedded steel plate and the station cover excavation top plate; and the U-shaped bolt is in threaded connection with the steel joist.

A construction method for crossing underground stations by municipal ditches comprises the following steps: step one, carrying out intercepting and drainage guide treatment on municipal ditches; step two, constructing a supporting system; thirdly, recovering the original line of the municipal ditch; and fourthly, constructing the station structure to build a structure of the municipal ditch crossing the underground station.

In the construction method for crossing the municipal ditch across the underground station, it is further preferable that in the step one, when the municipal ditch is subjected to the intercepting and drainage treatment, the municipal ditch is cut off, and the water in the municipal ditch is naturally guided or pumped by using the pipe bundle.

In the above method for constructing a municipal ditch across an underground station, it is further preferable that in the second step, the construction of the supporting system includes: firstly, constructing a fender pile, a crown beam, an upright pile foundation, a covered and excavated temporary steel upright and a steel joist in sequence; then, excavating a foundation pit of a station structure, constructing a station cover excavating top plate, arranging a U-shaped structure on the station cover excavating top plate and at the intersection of the station cover excavating top plate and the original line of the municipal ditch, and connecting the station cover excavating top plate with the steel joist and the crown beam respectively; and finally, erecting supports among the columns along with excavation of a foundation pit of the station structure, and sequentially erecting a first support and a second support, wherein two ends of the first support and the second support are respectively connected with the fender post through steel purlins, and the middle parts of the first support and the second support are respectively connected with the cover-excavation temporary steel stand columns.

In the above method for constructing a municipal ditch across an underground station, it is further preferable that in the third step, the municipal ditch is constructed at a U-shaped structure of a top plate of the station cover, and an original line of the municipal ditch is restored.

In the above method for constructing a town canal across an underground station, it is preferable that the fourth step includes: firstly, excavating a foundation pit of the station structure to an elevation, and constructing a foundation pit cushion layer and a bottom plate of the station structure on the foundation of the foundation pit; then, sequentially removing the second support and constructing a middle plate of the station structure, and removing the first support and constructing a negative layer side wall of the station structure to form a frame system of the station structure; and finally, sequentially breaking the covered and excavated temporary steel upright columns, removing the supports among the columns and removing the steel joists to complete the construction of the station structure, thereby building a structure of the municipal ditch crossing the underground station.

The construction method of the municipal ditch crossing underground stations is further preferably as follows: and (4) performing the construction of the first step by adopting a chamfering method, and performing the construction of the second step and the construction of the fourth step by adopting a local covering and excavating method.

Analysis shows that compared with the prior art, the invention has the advantages and beneficial effects that:

1. in the structure of the municipal ditch crossing the underground station, the station cover digger plate is arranged in a U shape at the matching part with the municipal ditch, namely the station cover digger plate is integrally a flat plate and is sunken downwards at the municipal ditch, so that the municipal ditch is avoided being opened, a new solution is provided for crossing the underground station by the municipal ditch, and the temporary and permanent replacement of the municipal ditch is avoided. The invention can solve the problem that the municipal ditch can not be moved out of the original position for various reasons, can also solve the problem that the municipal ditch conflicts with the vertical elevation of the underground station, can avoid temporarily moving and changing the municipal ditch without influencing the engineering implementation and operation use of the underground station, and has the characteristics of simple structure, convenient construction and investment saving.

2. In the construction structure of the municipal ditch crossing the underground station, a support system is arranged between the municipal ditch and the station structure, so that the requirements of station structure engineering construction in a construction stage, municipal ditch operation in a use stage and the use requirements of the station structure in a use stage can be met. According to the invention, the guard piles, the cover-excavation temporary steel stand columns, the stand column pile foundations, the inter-column supports and the steel joists form a cover-excavation temporary support system, so that the safety of the foundation pit excavation of a station structure and the safety of the station cover-excavation top plate in the implementation process can be ensured; utilize crown beam, steel purlin, station lid to dig roof, first support, second support and constitute supporting construction, can ensure the safety of foundation ditch excavation stage, be convenient for implement underground structure smoothly.

3. In the construction method for crossing the underground station by the municipal ditch, the construction is carried out by adopting the edge chamfering method, so that the fender posts can keep away from the steel pipe on the plane; the mode of plate lowering treatment of the top plate is adopted when the top plate is dug in the process of constructing the station cover, so that the conflict between the station structure and the municipal ditch can be avoided in the vertical direction, the municipal ditch is not moved, the problem of conflict between the station structure and the vertical elevation of the municipal ditch can be solved, the later operation of the station structure and the use of the municipal ditch are not influenced, the construction period can be saved, and the investment can be saved; the construction is carried out by adopting the local cover-digging sequential method, the improvement of the municipal ditch can be completed as soon as possible, so that the municipal ditch meets the use requirement, the construction of a station structure is not influenced, and the construction difficulty in the construction of the station structure is reduced.

Drawings

Fig. 1 is a schematic structural view of a municipal ditch crossing an underground station.

Fig. 2 is a schematic view of a structure of a town trench crossing an underground station in a width direction of the station structure.

Fig. 3 is a schematic view of a structure of a town trench crossing an underground station in a length direction of the station structure.

Fig. 4 is a schematic view of a construction structure of a municipal ditch crossing an underground station.

Fig. 5 is a schematic view of a construction structure of a town trench crossing an underground station in a width direction of the station structure.

Fig. 6 is a schematic view of a construction structure of a town trench crossing an underground station in a length direction of the station structure.

Fig. 7 is a schematic view showing the connection between the steel joists and the station cover and the top plate.

In the figure: 1-fender posts; 2-municipal ditches; 3-covering and digging the temporary steel upright; 4-column pile foundation; 5-supporting among columns; 6-steel joist; 7-station structure; 8-digging a top plate by a station cover; 9-a crown beam; 10-first pass support; 11-a second support; 12-steel purlin; 13-a steel pipe; 14-the ground; 15-a shear bond; 16-U-shaped bolts; 17-embedding a steel plate; 18-connecting steel plates.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.

Referring to fig. 1 to 7, fig. 1 is a schematic structural view of a municipal ditch crossing an underground station; FIG. 2 is a schematic view of a municipal trench crossing the structure of an underground station in the width direction of the station structure; FIG. 3 is a schematic view of a municipal aqueduct crossing the structure of an underground station in the length direction of the station structure; FIG. 4 is a schematic view of a construction structure of a municipal ditch crossing an underground station; FIG. 5 is a schematic view of a construction structure of a town trench crossing an underground station in a width direction of the station structure; FIG. 6 is a schematic view of a construction structure of a municipal ditch crossing an underground station in a length direction of the station structure; fig. 7 is a schematic view showing the connection between the steel joists and the station cover and the top plate.

As shown in fig. 1 to 3, the present invention provides a structure of a town ditch crossing an underground station, comprising a town ditch 2, a station cover and ceiling 8, and a station structure 7; the municipal ditch 2 is positioned below the ground 14, the municipal ditch 2 crosses over the station structure 7, and the station cover digger top plate 8 is positioned between the station structure 7 and the municipal ditch 2 and is integrally arranged with the station structure 7; in the cross-section perpendicular to 2 length direction of municipal irrigation canals and ditches, the station lid is dug the roof 8 and is the U type setting with municipal irrigation canals and ditches 2 matched with department.

Specifically, the station cover and excavation top plate 8 is arranged in a U shape at the position matched with the municipal ditch 2, namely the station cover and excavation top plate 8 is integrally a flat plate and is sunken downwards at the municipal ditch 2, and the sunken part is U-shaped, so that the municipal ditch 2 is avoided, a new solution is provided for the municipal ditch 2 crossing the underground station, and the temporary and permanent replacement of the municipal ditch 2 is avoided. The municipal ditch 2 and the station structure 7 are combined, and the municipal ditch 2 and the station structure 7 are in relatively independent states, so that the municipal ditch 2 and the station structure 7 are stressed clearly, the design and the construction are convenient, the management of respective property right units is convenient, the plane space can be saved, and the investment can be saved. Both can solve municipal irrigation canals and ditches 2 and can not move the problem of changing out the original position because of various reasons, can solve the problem that municipal irrigation canals and ditches 2 conflict with the vertical elevation of underground station again, can avoid moving temporarily and change municipal irrigation canals and ditches 2 and do not influence the engineering implementation and the operation use of underground station, have simple structure, construction convenience, save the characteristics of investment.

Furthermore, the municipal ditches comprise pre-construction ditches and post-construction ditches; the ditch canal is located the both sides of station structure 7 before the construction, and the ditch canal is located the top of station structure 7 after the construction, and the ditch canal both ends link to each other with the ditch canal before the construction respectively after the construction, and the station lid digs roof 8 and is U type setting in the crossing department with the ditch canal after the construction, is located the outside of ditch canal bottom surface and two sides after the construction.

Furthermore, the invention is suitable for the combination of the municipal canal 2 and the underground station engineering, and also can be used for the joint construction of the municipal pipeline and the underground station engineering, the joint construction of the municipal canal 2 and the underground open cut area, the joint construction of the municipal canal 2 and the underground comprehensive pipe gallery, the joint construction of the municipal canal 2 and the underground civil air defense engineering, the joint construction of the municipal canal 2 and the house building basement and the like. On the premise of meeting safety and reliability, the method has the advantages of simple construction, construction period saving, low construction cost, capability of avoiding temporary or permanent replacement of ditches and the like.

As shown in fig. 4 to 6, the invention also provides a construction structure of the municipal ditch crossing the underground station, which comprises a municipal ditch 2 and a station structure 7, wherein the municipal ditch 2 crosses the station structure 7, a support system is arranged between the municipal ditch 2 and the station structure 7, and the support system comprises fender posts 1, crown beams 9, cover-excavation temporary steel columns 3, steel joists 6 and station cover-excavation top plates 8; the plurality of fender posts 1 are arranged on two sides of the station structure 7 in the length direction, play a supporting role in excavation of a foundation pit of the station structure 7, and can also support a station cover excavation top plate 8; the top beam 9 is connected with the tops of the guard piles 1, after the guard piles 1 are poured, floating slurry on the tops of the guard piles 1 is chiseled off, the top beam 9 and the guard piles 1 are poured into an integrated structure, all the guard piles 1 can be connected together, collapse of the top edge of a foundation pit of the station structure 7 is prevented, and horizontal force and vertical shearing force can be borne through a bracket (beam support); the cover and dig temporary steel upright columns 3 are arranged in the station structure 7 and located below the municipal ditch 2, the steel joists 6 are welded to the tops of the cover and dig temporary steel upright columns 3 through connecting steel plates 18, the steel joists 6 correspond to the cover and dig temporary steel upright columns 3 one by one, and the connecting steel plates 18 are used for connecting the cover and dig temporary steel upright columns 3 and the steel joists 6, are welded to the steel joists 6, and are welded to the cover and dig temporary steel upright columns 3 through angle steel, gusset plates and stiffening rib plates; station lid digs roof 8 and is located between municipal irrigation canals and ditches 2 and station structure 7, and the station lid digs roof 8 and is the U type setting with municipal irrigation canals and ditches 2 department of cooperating, and station lid digs roof 8 and links to each other with steel joist 6, hat roof beam 9 respectively.

Specifically, the municipal ditch 2 and the station structure 7 are separated by a station cover-dug top plate 8, the station cover-dug top plate 8 is supported by the fender posts 1, the crown beams 9, the cover-dug temporary steel columns 3 and the steel joists 6, and the crown beams 9 are connected to the tops of the fender posts 1, so that the fender posts 1 can be connected into a whole. A plurality of steel joists 6 and a plurality of cover dig interim steel column 3 one-to-one, can cover to dig roof 8 to the station and support. The covered and dug temporary steel upright posts 3 are lattice posts, the station covered and dug top plate 8 is connected with the lattice posts through steel joists 6, and temporary covered and dug beams are not needed to be arranged, so that the later-stage chiseling of the temporary covered and dug beams can be avoided (in the prior art, the concrete temporary covered and dug upright posts and the concrete temporary covered and dug beams are generally arranged to form a beam-post system of a covered and dug structure, but the temporary covered and dug beams can influence the normal use of a station if turned downwards, and the return of a station top plate pipeline can be influenced if turned upwards, so that the later-stage chiseling is generally needed, the construction time is long, and the process is complicated; the cover-excavation temporary steel upright posts 3 are lattice posts made of section steel, so that the later chiseling work caused by concrete middle upright posts can be avoided, and longitudinal and transverse reinforcing steel bars of the station structure 7 can not be broken (in the prior art, generally, when the concrete temporary cover-excavation upright posts penetrate through a bottom plate and a middle plate of a station, holes are reserved at the post positions of the bottom plate and the middle plate, the reinforcing steel bars are communicated by a connector after the concrete temporary cover-excavation upright posts are broken, and concrete is poured, so that the reinforcing steel bars in the station plate can be broken, but the section steel lattice posts are adopted, and the reinforcing steel bars can penetrate or bypass the lattice posts, so that the breaking of the reinforcing steel bars can be avoided, the integrity of the station structure 7 can be ensured, and the construction period and the investment can be saved. According to the invention, the support system is constructed between the municipal ditch 2 and the station structure 7, so that the safety of the station structure 7 in the construction stage can be ensured, and the structure system that the municipal ditch 2 crosses the underground station can be built, so that the municipal ditch 2 does not need to be temporarily moved during construction, and the engineering implementation and operation of the station can be carried out.

In order to further improve the reliability of the invention, as shown in fig. 4 to 6, the support system of the invention further comprises a column pile foundation 4, an inter-column support 5, a first support 10, a second support 11 and a steel purlin 12; the plurality of upright post pile foundations 4 are positioned below the station structure 7 and are driven into the foundation of the station structure 7 to provide support for the covered and excavated temporary steel upright posts 3, and during construction, the covered and excavated temporary steel upright posts 3 are inserted three meters below the top surface of the upright post pile foundations 4, so that the support reliability of the covered and excavated temporary steel upright posts 3 can be ensured; in the length direction of the station structure 7, the inter-column supports 5 are connected between two adjacent covered and excavated temporary steel stand columns 3, and the inter-column supports 5 are welded with angle steel on the covered and excavated temporary steel stand columns 3, so that the covered and excavated temporary steel stand columns 3 can be connected into a whole, and the overall strength of the covered and excavated temporary steel stand columns 3 is improved; in the width direction of the station structure 7, a first support 10 and a second support 11 are sequentially arranged from top to bottom, two ends of the first support 10 and the second support 11 are respectively connected with the fender post 1 through a steel surrounding purlin 12 (the first support 10 and the second support 11 are both connected with the steel surrounding purlin 12 through movable ends and fixed ends, the steel surrounding purlin 12 is connected with the fender post 1 through expansion bolts and steel brackets), and the middle parts of the first support 10 and the second support 11 are respectively connected with the cover-excavation temporary steel upright posts 3 (steel corbels and steel connecting beams are arranged on the cover-excavation temporary steel upright posts 3, the first support 10 and the second support 11 are both connected with the cover-excavation temporary steel upright posts 3 through steel corbels and steel connecting beams), so that the plurality of fender posts 1 and the plurality of cover-excavation temporary steel upright posts 3 can be connected into a whole, the structural strength of the station structure is further improved, and the reliability of the station structure is improved.

In order to improve the connection strength between the station cover-dug roof plate 8 and the steel joist 6, as shown in fig. 4 to 7, the steel joist 6 and the station cover-dug roof plate 8 of the invention are fixedly connected through a fastening structure, and the fastening structure comprises a shear key 15, a U-shaped bolt 16 and an embedded steel plate 17; the U-shaped bolt 16 is buried in the station cover-dug top plate 8 and connected with an embedded steel plate 17 buried at the bottom of the station cover-dug top plate 8, and the thread surface of the U-shaped bolt 16 is positioned below the embedded steel plate 17 and used for providing a connecting position; the shear key 15 is arranged between the embedded steel plate 17 and the station cover-excavation top plate 8, so that the connection strength between the embedded steel plate 17 and the station cover-excavation top plate 8 can be improved; u type bolt 16 and steel joist 6 threaded connection are fastened by the nut after the round hole at 6 tops of steel joist is alternated to realize the fixed connection with steel joist 6, and then cover the station and dig roof 8 and steel joist 6 and cover and dig interim steel stand 3 fixed connection, joint strength and structural strength during the construction can improve.

In summary, the construction structure of the invention can meet the engineering construction requirements of the station structure 7 in the construction stage, the operation requirements of the municipal ditch 2 in the use stage and the use requirements of the station structure 7 in the use stage by arranging the supporting system between the municipal ditch 2 and the station structure 7. According to the invention, the guard post 1, the cover-excavation temporary steel upright 3, the upright post pile foundation 4, the inter-post support 5 and the steel joist 6 form a cover-excavation temporary support system, so that the safety of foundation pit excavation of a station structure 7 and the safety of a station cover-excavation top plate 8 in the implementation process can be ensured; a supporting structure is formed by the crown beam 9, the steel surrounding purlin 12, the station cover excavation top plate 8, the first support 10 and the second support 11, safety in a foundation pit excavation stage can be guaranteed, and the underground structure can be conveniently and smoothly implemented.

As shown in fig. 1 to 7, the present invention also provides a method for constructing a municipal ditch across a subway station, comprising the steps of:

step one, carrying out intercepting and drainage guiding treatment on the municipal ditch 2.

Wherein, when carrying out the drainage guide processing that dams to municipal administration irrigation canals and ditches 2, cut municipal administration irrigation canals and ditches 2 to use the tube bank to carry out nature water conservancy diversion or pump drainage with the water in municipal administration irrigation canals and ditches 2. For the convenience of construction, steel pipe 13 can be selected for use to the tube bank, cuts municipal irrigation canals and ditches 2 back, uses the pipeline of former municipal irrigation canals and ditches 2 of steel pipe 13 replacement, adopts modes such as pump drainage, nature water conservancy diversion to realize municipal irrigation canals and ditches 2's original function when station structure 7 is under construction, and simultaneously, steel pipe 13 area is little, is convenient for remove, can not influence the construction of underground structure, can remove according to the demand when station lid digs 8 constructions.

And step two, constructing a supporting system.

2.1, sequentially constructing the fender pile 1, the crown beam 9, the upright pile foundation 4, the covered and excavated temporary steel upright 3 and the steel joist 6 to preliminarily form a stable supporting system.

2.2 carry out the excavation of the foundation ditch of station structure 7, execute and do station lid digger plate 8, on station lid digger plate 8, set up U type structure with the crossing department of original circuit of municipal irrigation canals and ditches 2, station lid digger plate 8 links to each other with steel joist 6, crown beam 9 respectively.

2.3 along with the excavation of the foundation ditch of station structure 7, erect inter-column support 5 to erect first way support 10 and second way support 11 in proper order (including steel enclosing purlin 12), the both ends that first way support 10, second were said and are supported 11 and are linked to each other with fender pile 1 through steel enclosing purlin 12 respectively, and the middle part digs interim steel stand 3 with the lid respectively and links to each other.

Thirdly, recovering the original line of the municipal ditch 2;

wherein, covering digs 8 construction of roof and resumes municipal irrigation canals and ditches 2 after accomplishing at the station, covering the U type structure department of diging roof 8 at the station and being under construction municipal irrigation canals and ditches 2, resuming municipal irrigation canals and ditches 2's original circuit, station cover digs roof 8 and is the U type with the crossing department of municipal irrigation canals and ditches 2, and municipal irrigation canals and ditches 2 who corresponds with this are the box irrigation canals and ditches, and station cover digs roof 8's U type structure can also provide the location for municipal irrigation canals and ditc.

And fourthly, constructing the station structure 7 to build the structure of the municipal ditch 2 crossing the underground station.

4.1 excavate the foundation ditch of station structure 7 to the elevation, at the basement construction foundation ditch bed course of foundation ditch and the bottom plate of station structure 7, execute station structure 7 again, form the construction structure system when municipal ditch 2 strides underground station.

4.2 after foundation ditch bed course construction is accomplished, the bottom plate of construction station structure 7, after the bottom plate construction was accomplished, demolish second way support 11 in proper order (including the steel purlin 12 that links to each other with second way support 11, the steel is even the tie beam), execute the medium plate of doing station structure 7, after the medium plate construction was accomplished, demolish first way support 10 (including the steel purlin 12 that links to each other with first way support 10, the steel is even the tie beam), execute the minus one deck side wall of doing station structure 7, form station structure 7's frame system.

4.3, sequentially removing the covering and digging temporary steel upright posts 3, removing the inter-post supports 5 and removing the steel joists 6, completing the construction of a station structure 7, and building a structure of the municipal ditch 2 crossing the underground station.

In conclusion, the invention adopts the chamfering method to carry out construction when carrying out closure drainage guide treatment on the municipal ditch 2, for example, the station cover digger plate 8 is finished in two or more stages, during the construction, the steel pipe 13 is placed on the left side of the station cover digger plate 8 in the first stage, and the right side part of the station cover digger plate 8 is constructed at the same time; after the construction of the right side part of the station cover excavation roof 8 is completed, the pipeline is placed on the right side of the station cover excavation roof 8, and meanwhile, the left side part of the station cover excavation roof 8 is constructed until the construction of the station cover excavation roof 8 is completed. When the fender pile 1 is constructed, the municipal ditches 2 on two sides of the station structure 7 are firstly intercepted, water in the municipal ditches 2 is naturally guided or pumped to the other side from one side of the station by a group of steel pipes 13, the fender pile 1 on one side of the station structure 7 is firstly constructed, the steel pipes 13 are arranged on the other side of the station structure 7, then the fender pile 1 on the other side of the station structure 7 is constructed, the positions of the steel pipes 13 are reversed, and the fender pile 1 can be kept away from the steel pipes 13 on the plane by adopting a beveling method. According to the invention, when the station cover digger top plate 8 is constructed, a top plate lowering treatment mode (the station cover digger top plate 8 is bent downwards at the intersection with the municipal ditch 2 and is in a U-shaped structure) is adopted, so that the conflict between the station structure 7 and the municipal ditch 2 can be avoided in the vertical direction, the municipal ditch 2 can not be changed, the problem of the conflict between the station structure 7 and the vertical elevation of the municipal ditch 2 can be solved, no adverse effect is caused on the later operation of the station structure 7 and the use of the municipal ditch 2, the construction period can be saved, and the investment can be saved.

When the construction of the second step and the fourth step is carried out, the invention adopts a local covering and excavating method to carry out construction, namely: local cover is dug and is meant when construction station structure 7, constructs station cover as early as possible at station structure 7 and municipal irrigation canals and ditches 2 crossing department and digs roof 8, carries out the excavation of station structure 7's foundation ditch again to can accomplish municipal irrigation canals and ditches 2's transformation as early as possible, make municipal irrigation canals and ditches 2 satisfy operation requirement and do not influence station structure 7's construction. The sequential construction refers to that after a foundation pit with the station structure 7 is dug, the station structure 7 is constructed in the foundation pit from bottom to top in sequence, and the construction difficulty during construction of the station structure 7 can be reduced.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.