CN215108955U

CN215108955U - Water stopping structure used during construction of underground excavation station of subway

Info

Publication number: CN215108955U
Application number: CN202120732342.8U
Authority: CN
Inventors: 向志军
Original assignee: Chongqing Yongang Industrial Co ltd
Current assignee: Chongqing Yongang Industrial Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-12-10
Anticipated expiration: 2031-04-12

Abstract

The utility model relates to a technical field that subway station was built, concretely relates to subway secretly digs stagnant water structure during station construction, it includes a plurality of pilot tunnels, the pilot tunnel includes vault, lateral wall and diapire, the pilot tunnel is provided with supporting component, supporting component is including connecting the stock, it connects stock one end in the vault to connect stock, the other end of connecting the stock is worn out ground and is connected the stock and be connected with the butt piece, butt piece butt in ground. The utility model discloses have and enable the vault structure atress when the lateral wall is demolishd littleer relatively, be difficult for taking place to collapse and the water infiltration pilot tunnel inside beneficial technological effect in the reducible soil layer of waterproof layer that sets up.

Description

Water stopping structure used during construction of underground excavation station of subway

Technical Field

The application relates to the technical field of subway station construction, in particular to a water stop structure for a subway underground excavation station during construction.

Background

With the increase of the quantity of automobiles kept by everyone in China, the traffic jam degree of the road surface is gradually serious, and more cities with traffic jams begin to develop the construction of rail subway traffic. The underground water resource is wasted when the subway station is built by adopting the construction dewatering method, and the long-term development and planning are not facilitated, so that the existing building method is usually constructed by adopting an underground excavation method.

In the construction process of the underground excavation method, a plurality of pilot holes need to be excavated firstly, and the pilot holes can play a supporting role and a water stopping role, so that water seepage interference construction is relatively difficult to occur in the construction process, and the safety of construction personnel is guaranteed. The partial side wall of pilot tunnel need be demolishd after the pile body sets up to finish, and the week side wall face of construction station when demolising the pilot tunnel lateral wall, begins the construction from the pilot tunnel in the top usually, nevertheless demolishs the in-process and causes the vault structure unstability easily, probably produces the condition that collapses, therefore, the inventor thinks to need urgently to provide a pilot tunnel structure that demolishs in-process vault structure comparatively stable.

SUMMERY OF THE UTILITY MODEL

In order to make the pilot tunnel demolish in-process vault structure more stable relatively, this application provides a subway secretly digs stagnant water structure during station construction.

The application provides a subway secretly digs stagnant water structure during station construction adopts following technical scheme:

the utility model provides a subway secretly digs stagnant water structure during station construction, includes a plurality of pilot holes, the pilot hole includes vault, lateral wall and diapire, the pilot hole is provided with supporting component, supporting component is including connecting the stock, it connects in the vault to connect stock one end, the other end of connecting the stock is worn out ground and is connected the stock and be connected with butt piece, butt piece butt in ground.

Through adopting above-mentioned technical scheme, connect the stock and connect in the vault to set up the butt piece and lean on the ground, when the lateral wall was demolishd, the power of soil layer extrusion vault can have the connection stock to transmit to the butt piece, is dispersed in ground by the butt piece again, thereby the atress of vault structure is littleer relatively, makes the vault be difficult for taking place the condition that collapses relatively.

Optionally, the supporting component further comprises a supporting bottom plate which is of a strip-shaped structure, the supporting bottom plate extends along the length direction of the pilot tunnel and abuts against the ground, and the connecting anchor rod is provided with a plurality of abutting pieces which abut against one side of the supporting bottom plate, which faces away from the ground.

Through adopting above-mentioned technical scheme, a plurality of connection stock can pull the support to encircleing different positions of roof, and set up in the supporting baseplate on ground and can connect a plurality of connection stock, increase the wholeness of a plurality of connection stock and improve the area of contact who connects stock and ground for it is relatively better to the support effect that pulls of vault to connect the stock.

Optionally, the side wall includes a side plate and a waterproof layer, a fixing hole is formed in the edge of one side of the side plate facing the vault, an insertion rod is arranged at the lower end of the vault, the insertion rod is inserted into the fixing hole, and the waterproof layer is connected to one side of the side plate facing the soil layer.

Through adopting above-mentioned technical scheme, the curb plate is inserted through the inserted bar and is established the fixed orifices and be fixed in the vault for the curb plate demolishs the in-process and is less relatively to the influence of vault structure, and the inside water infiltration pilot tunnel in the reducible soil layer of waterproof layer that sets up.

Optionally, an impermeable part for reducing water infiltration is formed on one side edge of the side plate facing the arch crown.

By adopting the technical scheme, the seepage-proofing part can reduce the water in the soil layer from permeating into the hole between the connecting gaps of the side plates and the vault.

Optionally, an inter-arch assembly is arranged between two adjacent pilot tunnels at the same horizontal position, the inter-arch assembly comprises a plurality of advanced small guide pipes, the outline of the radial section connecting line of the plurality of advanced small guide pipes is of an arc-shaped structure, and the end part of the arc-shaped structure faces the pilot tunnel.

Through adopting above-mentioned technical scheme, a plurality of leading little pipes that set up between two pilot tunnels can improve the structural strength of soil layer to the slip casting in the soil layer in the closely knit degree of soil layer for when the follow-up soil layer of excavating between two pilot tunnels after demolising the lateral wall, the difficult condition that takes place to collapse of soil layer of top.

Optionally, the inter-arch assembly further comprises a plurality of support rods, the support rods are located above the plurality of leading small guide pipes, and one end of each support rod is correspondingly connected with the arch top of one guide hole.

Through adopting above-mentioned technical scheme, the bracing piece can be connected two adjacent guide holes to the soil layer of bracing piece top supports, and the pressure that the bracing piece received can disperse to the vault, reduces the uneven condition that takes place to warp and collapse of a plurality of vaults atress.

Optionally, the vault is connected with the fixed block, the tip of bracing piece and the end connection of connecting the stock are in the fixed block.

Through adopting above-mentioned technical scheme, the fixed block of bracing piece end connection can link to each other with the tip of connecting the stock to the atress of bracing piece can transmit to the vault and transmit to connecting the stock by the fixed block, thereby makes the strut effect of bracing piece to the soil layer better relatively.

Optionally, the inner wall of the pilot tunnel is sprayed with a waterproof mortar layer.

Through adopting above-mentioned technical scheme, waterproof mortar layer can block the water of a small amount of infiltration in the pilot hole to make the condition that can keep relative drying in the pilot hole.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the connecting anchor rod is connected to the vault, the abutting sheet abuts against the ground surface, when the side wall is detached, the force of the soil layer extruding the vault can be transmitted to the abutting sheet through the connecting anchor rod and then is dispersed in the ground through the abutting sheet, so that the stress of the vault structure is relatively small, and the vault is relatively not easy to collapse;

2. the side plates are fixed on the arch crown by inserting the insertion rods into the fixing holes, so that the influence on the arch crown structure in the dismantling process of the side plates is relatively small, and the arranged waterproof layer can reduce the water in a soil layer to permeate into the guide holes.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present application;

FIG. 2 is a partial structural cross-sectional view of an embodiment of the present application;

fig. 3 is a schematic structural diagram of the subway station after the subway station is constructed.

Description of reference numerals: 1. guiding a hole; 11. a dome; 111. inserting a rod; 112. a fixed block; 12. a side wall; 121. a side plate; 122. a waterproof layer; 123. a fixing hole; 124. a seepage-proofing part; 13. a bottom wall; 14. a waterproof mortar layer; 2. a support assembly; 21. connecting an anchor rod; 211. abutting the sheet; 22. a support base plate; 3. an inter-arch component; 31. a small advanced catheter; 32. a support rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses subway secretly digs stagnant water structure during station construction. Referring to fig. 1 and 2, the water stopping structure during construction of the underground excavation station of the subway includes a pilot tunnel 1. Eight and four pilot tunnels 1 are arranged in the pilot tunnel 1 to form a group, and the two groups of pilot tunnels 1 are respectively positioned at different horizontal positions. The pilot tunnel 1 comprises a vault 11, a side wall 12 and a bottom wall 13, when the pilot tunnel 1 needs to be dismantled to build a station peripheral wall, the dismantling construction is usually started by a group of pilot tunnels 1 positioned above, then the group of pilot tunnels 1 below are downwards constructed layer by layer, and finally the group of pilot tunnels 1 below are dismantled, while the original structure is easily damaged when the group of pilot tunnels 1 above are dismantled, so that a dangerous condition is generated. Therefore, a group of guide holes 1 located above is provided with the supporting component 2, the supporting component 2 can support the arch top 11, and when the side wall 12 needs to be detached, the structural stability of the arch top 11 is not easy to decline, so that the condition that the guide holes collapse is not easy to occur.

Referring to fig. 1 and 2, the support assembly 2 includes a support base plate 22 and a plurality of connection anchors 21, the connection anchors 21 are anchored in the ground from the ground surface and one ends of the connection anchors 21 are fixedly connected to the arch crown 11, and the other ends of the connection anchors 21 penetrate through the ground and one ends thereof penetrating through the ground are welded with abutting pieces 211. The supporting base plate 22 is a strip-shaped sheet structure, the length direction of the supporting base plate 22 is parallel to the central axis direction of the guide hole 1, the supporting base plate 22 is arranged on the ground, the end portions of the plurality of connecting anchor rods 21 penetrate through the supporting base plate 22, and the abutting pieces 211 are located above the supporting base plate 22 and abut against the supporting base plate 22. The support base plate 22 may connect a plurality of connection anchors 21, and the support base plate 22 may increase a contact area of the upper ends of the connection anchors 21 with the ground, so that the arch 11 is relatively more effectively dragged and supported by the connection anchors 21. In addition, in order to further increase the bearing capacity of the support base plate 22, a plurality of support piles are cast under the support base plate 22, the support piles are equidistantly distributed along the length direction of the support base plate 22, and the support base plate 22 abuts against the support piles.

Referring to fig. 1 and 2, the side wall 12 includes a side plate 121 and a waterproof layer 122, and the side plate 121 is a precast concrete plate. The vault 11 is formed by concrete pouring and its inside is provided with arc reinforcing bar net and makes the support, and the curved both ends of vault 11 are provided with a plurality of inserted bars 111, and a plurality of adaptations in the fixed orifices 123 of inserted bar 111 are seted up towards one side border of vault 11 to the curb plate 121, and inserted bar 111 inserts and locates in the fixed orifices 123, and the seam crossing coating between curb plate 121 and the vault 11 has the concrete that is used for fixing. The waterproof layer 122 is made of waterproof coiled material and is adhered to one side of the side plate 121 facing the soil layer, and the upper end edge of the waterproof layer 122 is adhered to the outer side wall of the vault 11, so that the waterproof layer 122 can reduce the condition that water in the soil layer permeates into the guide hole 1 from the gap between the vault 11 and the side plate 121. Diapire 13 adopts the concrete direct casting in the diapire of pilot tunnel 1 to, the inner wall injection of pilot tunnel 1 has waterproof mortar layer 14, and waterproof mortar layer 14 can block a small amount of infiltration water, makes the condition of keeping relatively dry in pilot tunnel 1.

In addition, the edge of one side of the side plate 121 facing the arch top 11 is provided with a seepage-proofing part 124, the seepage-proofing part 124 is in a long strip structure and is integrally formed with the side plate 121, the width of the section of the seepage-proofing part 124 perpendicular to the axial direction is smaller than the width of the side plate 121, and the seepage-proofing part 124 is located on one side of the edge of the side plate 121 close to the inside of the guide hole 1. The barrier 124 may increase the area of the connection at the seam of the side panel 121 and the dome 11, thereby reducing water infiltration.

Referring to fig. 2 and 3, two adjacent pilot tunnels 1 at the same horizontal position are provided with inter-arch components 3, and the inter-arch components 3 can reinforce soil layers between the two adjacent pilot tunnels 1, so that the situation of soil layer collapse in the process of excavating and constructing the peripheral wall of the station is reduced. Subassembly 3 includes a plurality of little pipes 31 and a plurality of bracing pieces 32 in advance between hunch, and a plurality of little pipes 31 in advance insert along the length direction of pilot tunnel 1 and establish, and insert and pour into the concrete mortar in the little pipe 31 in advance after establishing and be arranged in carrying out the shutoff to gap in the soil layer to improve the closely knit degree on soil layer, the excavation in-process is difficult for collapsing relatively. The connecting line profile of the radial section of the leading small conduit 31 is an arc structure, one end of the arc structure faces one guide hole 1 correspondingly, and the leading small conduit 31 is located above the side plate 121. A plurality of small advance pipes 31 are also inserted in the soil layer above the arch crown 11.

The supporting rod 32 is located above the multiple advanced small guide pipes 31, the axial direction of the supporting rod 32 is perpendicular to the axial direction of the guide hole 1, the end of the supporting rod 32 penetrates through the wall surface of the arch crown 11, a fixing block 112 is formed by pouring the end of the supporting rod 32, one end of the supporting rod 32 correspondingly penetrates through one arch crown 11, the fixing block 112 is fixedly poured on the arch crown 11, and the supporting rods 32 are distributed at equal intervals along the length direction of the guide hole 1. Thereby, the supporting rod 32 can reinforce the soil layer between two adjacent guide tunnels 1 again, so that the soil layer is not easy to collapse in the excavation process. In addition, the ends of the connection anchors 21 are also cast in the fixing blocks 112, so that the force applied to the support rods 32 by the earth can be transmitted to the arches 11 and dispersed to the ground by the connection anchors 21 and the support base 22, thereby improving the stability of the earth above, and the overall structural stability of the plurality of arches 11 is relatively higher.

The construction process of the water stop structure during the construction period of the underground excavation station of the subway is as follows:

1. excavating a corresponding pilot tunnel 1, arranging a small advanced guide pipe 31 on a soil layer anchor of the arch top 11 to pre-reinforce the soil layer of the arch top 11, then anchoring a connecting anchor rod 21 from the ground, enabling an abutting sheet 211 of the connecting anchor rod 21 to abut against a supporting bottom plate 22, and enabling the other end of the connecting anchor rod 21 to penetrate into the arch top 11 and be fixedly connected with the arch top 11;

2. connecting the prefabricated side plate 121 with the vault 11, attaching a waterproof layer 122 to the side plate 121, pouring the bottom wall 13, and finally spraying a waterproof mortar layer 14 to the inner wall of the pilot tunnel 1;

3. the support rod 32 is arranged from the horizontal anchor of the vault 11, the end part of the support rod 32 is formed into a fixed block 112 by adopting concrete pouring, the end part of the support rod 32 and the end part of the connecting anchor rod 21 are positioned in the fixed block 112, and then the leading small guide pipe 31 is anchored between the two guide holes 1 to reinforce the soil layer.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a subway secretly digs stagnant water structure during station construction, includes a plurality of pilot tunnels (1), pilot tunnel (1) includes vault (11), lateral wall (12) and diapire (13), its characterized in that: the pilot tunnel (1) is provided with supporting component (2), supporting component (2) are including connecting stock (21), connect stock (21) one end and connect in vault (11), the other end of connecting stock (21) is worn out ground and is connected stock (21) and be connected with butt piece (211), butt piece (211) butt in ground.

2. The water stop structure during construction of the underground excavation station of a subway according to claim 1, characterized in that: the supporting component (2) further comprises a supporting bottom plate (22) which is of a strip-shaped structure, the supporting bottom plate (22) extends along the length direction of the guide hole (1) and abuts against the ground, and the connecting anchor rod (21) is provided with a plurality of abutting pieces (211) which abut against one side of the supporting bottom plate (22) back to the ground.

3. The water stop structure during construction of the underground excavation station of a subway according to claim 2, characterized in that: lateral wall (12) include curb plate (121) and waterproof layer (122), fixed orifices (123) have been seted up towards one side border of vault (11) in curb plate (121), the lower extreme of vault (11) is provided with inserted bar (111), inserted bar (111) are inserted and are located in fixed orifices (123), waterproof layer (122) are connected in curb plate (121) towards one side of soil layer.

4. The water stop structure during construction of the underground excavation station of a subway according to claim 3, characterized in that: the side edge of the side plate (121) facing the vault (11) is provided with a seepage-proofing part (124) for reducing water seepage.

5. The water stop structure during construction of the underground excavation station of a subway according to claim 2, characterized in that: the two adjacent pilot tunnels (1) on the same horizontal position are provided with inter-arch components (3), each inter-arch component (3) comprises a plurality of small advanced guide pipes (31), the outlines of the radial section connecting lines of the small advanced guide pipes (31) are of arc structures, and the end parts of the arc structures face the pilot tunnels (1).

6. The water stop structure during construction of the underground excavation station of a subway according to claim 5, characterized in that: the inter-arch assembly (3) further comprises a plurality of supporting rods (32), the supporting rods (32) are located above the plurality of leading small guide pipes (31), and one end of each supporting rod (32) is correspondingly connected with the arch top (11) of one guide hole (1).

7. The water stop structure during construction of the underground excavation station of a subway according to claim 6, characterized in that: the arch crown (11) is connected with a fixing block (112), and the end part of the supporting rod (32) and the end part of the connecting anchor rod (21) are connected to the fixing block (112).

8. The water stop structure during construction of the underground excavation station of a subway according to any one of claims 1 to 7, wherein: and a waterproof mortar layer (14) is sprayed on the inner wall of the pilot tunnel (1).