Closed water stop structure for post-construction of metro station connected channel

Abstract

The utility model discloses a closed water stop structure for post-construction of a subway station communication channel, which comprises the subway station communication channel, an existing communication channel and a post-construction communication channel, and the post-construction communication channel is arranged on the right side of the existing communication channel. The closed water stop structure comprises a large-diameter vertical water stop body and a large-diameter large-angle inclined water stop body, the large-diameter vertical water stop body is arranged at the right end of the existing communication channel, and the large-diameter large-angle inclined water stop body is arranged at the right end of the existing communication channel. The structure effectively cuts off hydraulic connection inside and outside the foundation pit at the joint of the bottom plate and the weak water stop position of the end corner, ensures smooth construction of the subway station communication channel, is suitable for complex geological conditions of high underground water areas, and can effectively reduce the construction cost while the operation safety of the existing subway is not influenced. And construction of connecting channels with commercial centers of surrounding plots is completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to closed water stop structure technical field, especially relate to a kind of closed water stop structure for metro station intercommunication passage post construction. BACKGROUND

[0002] At present, with the development of economy and city society, more and more cities build metro in China, and the coverage of metro line network is wider and wider, and most of them are built in the bustling area of city center. For some existing operating metro stations, it is often necessary to add connecting passages with metro stations with the development of surrounding commercial centers. It is particularly important to safely and efficiently complete the construction of connecting passages in high groundwater areas without affecting the safety of operating metro.

[0003] The current intercommunication passage construction interface node water stop measures have the following problems:

[0004] 1. The commonly used method is to construct a water stop curtain outside the existing metro station structure. The water stop curtain is gradually removed with the excavation of foundation pit. However, the quality of the newly constructed water stop curtain is difficult to guarantee due to the residual of the original supporting structure of the metro station.

[0005] 2. The surface of the waterproof roll at the corner of the metro intercommunication passage bottom plate is smooth, and cannot be well connected with the water stop structure. Underground water leakage accidents often occur at the bottom plate connection, which seriously affects the construction and operation of the metro. INVENTION CONTENTS

[0006] The utility model aims to provide a kind of closed water stop structure for metro station intercommunication passage post construction to solve the above problems of prior art.

[0007] In order to achieve the above purpose, the utility model provides the following technical scheme: a kind of closed water stop structure for metro station intercommunication passage post construction, including metro station intercommunication passage, its existing intercommunication passage and post construction intercommunication passage, the post construction intercommunication passage is set in the right side of existing intercommunication passage;Closed water stop structure, including large-diameter vertical water stop body and large-diameter large-angle inclined water stop body, the large-diameter vertical water stop body is set in the right side end position of existing intercommunication passage, and the large-diameter large-angle inclined water stop body is set in the right side end position of existing intercommunication passage;Supporting structure, including soil retaining water stop component and support component, the soil retaining water stop component is set around post construction intercommunication passage, and the support component is set at the top of post construction intercommunication passage.

[0008] In a preferred embodiment, the right side of the existing intercommunication passage is provided with a reserved interface.

[0009] In a preferred embodiment, the bottom of the existing intercommunication passage is provided with a waterproof layer.

[0010] In a preferred embodiment, the large-diameter vertical water stop body is arranged in a U-shaped bending shape, and the large-diameter vertical water stop body is arranged outside the post-construction connecting channel.

[0011] In a preferred embodiment, the large-diameter large-angle inclined water stop body is arranged in a fan shape.

[0012] In a preferred embodiment, the inside of the large-diameter large-angle inclined water stop body is provided with a construction drill rod, a pre-drilled hole and a grouting body, and the construction drill rod is arranged in an inclined manner.

[0013] In a preferred embodiment, the surface of the construction drill rod is provided with a high-precision electronic digital inclinometer.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. The construction large-diameter vertical water stop body and the large-diameter large-angle inclined water stop body effectively cut off the hydraulic connection between the inside and outside of the weak position of the base plate connection and the end corner water stop, ensure the smooth construction of the connecting channel of the subway station, and the structure is suitable for complex geological conditions in high groundwater areas, and can complete the connecting channel construction of the surrounding commercial center without affecting the safety of the existing subway operation.

[0016] 2. The high-precision electronic digital inclinometer is used to measure the construction drilling angle of the drill rod every 30 minutes during the drilling process, which can prevent the drill rod from deviating downward due to the self-weight effect during construction, reduce the lap length of the work method pile and the subway structure bottom plate, and affect the construction quality, and can also prevent the drill rod from deviating upward, and ensure the safety of the subway structure during construction. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a leakage risk schematic diagram of the connecting channel of the subway station of the utility model;

[0018] Figure 2 is a plan view of the utility model;

[0019] Figure 3 is a sectional view of the utility model.

[0020] Marked in the figure: 1 - connecting channel of subway station, 11 - existing connecting channel, 12 - post-construction connecting channel, 13 - waterproof layer, 21 - large-diameter vertical water stop body, 221 - construction drill rod, 222 - pre-drilled hole, 223 - grouting body, 22 - large-diameter large-angle inclined water stop body, 31 - soil retaining and water stopping component, 32 - supporting component, 4 - high-precision electronic digital inclinometer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below. All other embodiments obtained by the person skilled in the art without creative labor under the premise of the embodiments in the utility model belong to the protection scope of the utility model.

[0022] Embodiment 1:

[0023] Embodiment Figure 1 - Figure 3 As shown in the figure, the utility model provides a kind of for metro station connecting passage rear construction closed water stop structure, including metro station connecting passage 1, including: existing connecting passage 11 and rear construction connecting passage 12, rear construction connecting passage 12 is set in the right side of existing connecting passage 11.Closing water stop structure, including: large diameter vertical water stop body 21 and large diameter large angle oblique water stop body 22, large diameter vertical water stop body 21 is set in the right side end position of existing connecting passage 11, and large diameter large angle oblique water stop body 22 is set in the right side end position of existing connecting passage 11.Supporting structure, including: retaining water stop component 31 and support component 32, retaining water stop component 31 is set around rear construction connecting passage 12, and support component 32 is set at the top of rear construction connecting passage 12, for the support when rear construction connecting passage 12 is excavated, ensure the security in the process of excavation.

[0024] Further, the right side of existing connecting passage 11 is provided with a reserved interface for final docking with rear construction connecting passage 12.

[0025] Further, the bottom of existing connecting passage 11 is provided with a waterproof layer 13.

[0026] Further, large diameter vertical water stop body 21 is set as U-shaped bending shape, and large diameter vertical water stop body 21 is surrounded outside rear construction connecting passage 12, effectively closes weak water stop position of end corner of rear construction connecting passage 12, and diameter is not less than 1.5m, and embedded depth is not less than 5m.

[0027] Further, large diameter large angle oblique water stop body 22 is set as sector, effectively closes weak water stop position of end corner of existing connecting passage 11, and is not less than 5m into the bottom plate of existing connecting passage 11, and horizontal projection covers vertical water stop body and expands outward by not less than 0.5m, and the angle with vertical direction is not more than 45 degrees, and diameter is not less than 2m and not less than the diameter of vertical water stop body.

[0028] Further, the inside of large diameter large angle oblique water stop body 22 is provided with construction drill rod 221, pre-drilled hole 222 and grouting body 223, construction drill rod 221 is set in an oblique direction, and the distance between the center of construction drill rod 221 and the outer edge of existing connecting passage 11 is not less than 0.5m.

[0029] Further, the surface of the construction drill rod 221 is provided with a high-precision electronic digital inclinometer 4 for measuring the drilling angle of the construction drill rod 221, preventing deviation, and ensuring construction quality and subway structure safety.

[0030] Embodiment 2:

[0031] The specific use method of the utility model is introduced as follows: a three-dimensional closed system is formed by the large-diameter vertical water stop body 21 and the large-diameter large-angle inclined water stop body 22, wherein the large-diameter vertical water stop body 21 is arranged in a U shape at the end of the existing connecting passage 11, effectively sealing the weak water stop part at the corner of the end of the post-construction connecting passage 12, the diameter or width of the large-diameter vertical water stop body 21 is not less than 1.5 m, and the embedded depth is not less than 5 m, a rotary jet pile or a TRD process is used to form a high-strength continuous water stop curtain;

[0032] The large-diameter large-angle inclined water stop body 22 is arranged in a fan shape outside the end of the existing connecting passage 11, penetrates the bottom plate of the existing structure by 5 m through a grouting body 223 with a diameter of not less than 2 m, and covers the outer expansion of the large-diameter vertical water stop body 21 by more than 0.5 m, which not only enhances the water sealing performance of the corner area, but also monitors the drilling angle in real time through the cooperation of the construction drill rod 221 and the high-precision electronic digital inclinometer 4 (corrected every 30 minutes), ensures the accurate lapping of the grouting body 223 and the bottom plate of the subway structure, and avoids insufficient lapping length or intrusion into the structure due to the deviation of the drill rod;

[0033] At the same time, the soil retaining and water stopping member 31 and the supporting member 32 in the supporting structure cooperate to form a stable soil supporting system during excavation, and the entire structure is constructed through reasonable construction steps, including measurement and setting out, excavation, drilling, grouting, and supporting, etc., to ensure the smooth construction of the post-construction connecting passage 12 and the safety of the existing subway structure, finally, part of the water stop body is removed in sections, the connecting passage is poured as a whole, and the construction of the closed water stop structure is completed.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A closed water-stop structure for construction after the connecting passage of a subway station, characterized in that, include: The subway station connecting passage (1) includes an existing connecting passage (11) and a post-construction connecting passage (12), wherein the post-construction connecting passage (12) is located on the right side of the existing connecting passage (11); The closed water-stopping structure includes a large-diameter vertical water-stopping body (21) and a large-diameter large-angle oblique water-stopping body (22). The large-diameter vertical water-stopping body (21) is located at the right end of the existing connecting channel (11), and the large-diameter large-angle oblique water-stopping body (22) is located at the right end of the existing connecting channel (11). The support structure includes a retaining and water-stopping component (31) and a supporting component (32). The retaining and water-stopping component (31) is arranged around the rear construction connecting passage (12), and the supporting component (32) is arranged on the top of the rear construction connecting passage (12).

2. The closed water-stopping structure for post-construction of subway station connecting passages as described in claim 1, characterized in that, A reserved interface is provided on the right side of the existing connection channel (11).

3. The closed water-stopping structure for construction after connecting passages in subway stations as described in claim 1, characterized in that, The bottom of the existing connecting channel (11) is provided with a waterproof layer (13).

4. The closed water-stopping structure for construction after connecting passages in subway stations as described in claim 1, characterized in that, The large-diameter vertical waterstop (21) is configured as a U-shaped bend and surrounds the outside of the rear construction connecting channel (12).

5. The closed water-stopping structure for construction after connecting passages in subway stations as described in claim 1, characterized in that, The large-diameter, large-angle oblique waterstop (22) is configured as a fan shape.

6. The closed water-stopping structure for post-construction of subway station connecting passages as described in claim 5, characterized in that, The large-diameter, large-angle inclined waterstop (22) is equipped with a construction drill rod (221), a pre-drilled hole (222) and a grouting body (223), and the construction drill rod (221) is inclined.

7. The closed water-stopping structure for post-construction of subway station connecting passages as described in claim 6, characterized in that, The surface of the construction drill rod (221) is equipped with a high-precision electronic digital display inclinometer (4).

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