Urban rail underground excavation tunnel station support structure

Abstract

The utility model discloses an urban rail underground excavation tunnel station support structure, which relates to the technical field of engineering plate structures, and comprises a support rod, a steel template, a steel template, a steel template, a steel template, a steel template, a steel template, a steel template and a steel template, and is characterized in that the support rod penetrates through the steel template and props against a primary support and a lining rack; the supporting rod penetrates through the elastic plate which is located on the face, facing the center of the tunnel, of the steel formwork; the pressing ring is penetrated by the supporting rod and is pressed on one surface, deviating from the steel template, of the elastic plate; the locker is used for locking the pressing ring and the supporting rod; wherein the elastic plate and the steel template are provided with a leveling layer. The method has the effect of reducing the slurry leakage risk during lining construction of the underground excavation section of the station.

Description

Technical Field

[0001] The present application relates to the technical field of engineering plate structures, and in particular to a support structure for a station in a dark-bored tunnel of an urban rail transit. Background Art

[0002] During the construction of the urban rail transit system, some stations require underground excavation construction.

[0003] Among them, the lining of the underground excavation section of the station is constructed with a self-made lining platform equipped with a combined steel formwork. One construction method is: the platform is made of I-beams, the steel frame spacing is 1.5m, the line is vertical during installation, the steel formwork and the steel frame are connected with U-shaped clips, the formworks are connected with pins and clips, and stop-slurry strips are set between the formwork seams; in order to fix the steel frame and prevent the formwork from running when pouring concrete and the buoyancy of the lower concrete before solidification causing the formwork to deform and shift, wooden supports are added, with one end of the wooden support supported on the steel frame and the other end supported on the initial support.

[0004] In order to allow the wooden support to be placed on the initial support and play a limiting role, but it is not only erected on the outside of the end plate, the wooden support needs to penetrate the formwork, resulting in an increased risk of concrete leakage. Therefore, this application proposes a new technical solution. Utility Model Content

[0005] In order to reduce the risk of slurry leakage during lining construction of the dark-cut section of a station, the present application provides a support structure for a dark-cut tunnel station of an urban rail transit.

[0006] The present application provides a support structure for a station of a dark-bored tunnel for urban rail transit, which adopts the following technical solution:

[0007] A support structure for a station of an urban rail dark-excavated tunnel, comprising:

[0008] Bracing rods, which pass through the steel formwork and are used to support the steel frame of the initial support and lining platform;

[0009] An elastic plate, which is penetrated by the struts and is located on the side of the steel formwork facing the tunnel centre;

[0010] a pressure ring, which is penetrated by the support rod and pressed against the side of the elastic plate facing away from the steel formwork; and

[0011] A locker, which is used to lock the pressure ring and the support rod;

[0012] Wherein, the elastic plate and the steel formwork are provided with a leveling layer.

[0013] Optionally, a skirt is provided on the side of the elastic plate, and the skirt extends toward the steel template. An injection tube is provided on the elastic plate, and the injection tube extends in a direction away from the steel template. The injection tube connects the front and back sides of the elastic plate. A one-way valve is installed on the injection tube, and the connection direction is toward one end of the steel template.

[0014] Optionally, the pressure ring includes two mutually symmetrical half rings, a connecting plate is extended from the end of the half ring toward a side away from the elastic plate, and a through hole is formed on the connecting plate.

[0015] Optionally, the locker includes a positioning rod, a base plate and a push rod, the support rod penetrates the base plate, the positioning rod penetrates the base plate and the support rod, the push rod is multiple and arranged around the base plate, the push rod penetrates the base plate and is threadedly connected with a nut 1, the nut 1 at least contacts the side of the base plate facing the pressure ring, and the push rod contacts the half ring.

[0016] Optionally, a nut 2 is threadedly connected to the positioning rod, and there are two nuts 2, which are respectively located on both sides of the base plate.

[0017] Optionally, the half ring is a magnetizable plate, and the end of the push rod that contacts the half ring is a permanent magnet.

[0018] Optionally, a thin film pressure sensor is also included, and the thin film pressure sensor is arranged on a side of the half ring facing the elastic plate.

[0019] To summarize, the present application includes at least one of the following beneficial technical effects: the leveling layer can be used in conjunction with the elastic plate to seal the gaps created by setting the support rods, and the elastic plate can be pressed with a pressure ring, and the pressure ring can be locked with a lock, so that the present application can reduce the risk of leakage during the lining construction of the underground excavation section of the station. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of this application.

[0021] Explanation of the reference numerals: 1. support rod; 2. elastic plate; 21. injection tube; 3. pressure ring; 31. half ring; 32. connecting plate; 4. locking device; 41. positioning rod; 42. base plate; 43. push rod; 44. nut one; 45. nut two. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1 This application is described in further detail.

[0023] An embodiment of the present application discloses a support structure for a station in a dark-bored tunnel of an urban rail transit.

[0024] Reference Figure 1 The support structure of the urban rail tunnel station includes a support rod 1, an elastic plate 2, a pressure ring 3 and a locker 4, wherein the support rod 1 can be a wooden structure, which is relatively light in weight and relatively easy to cut and use; the support rod 1 penetrates the pre-opened hole on the steel template and then supports the steel frame of the initial support and lining stand. It should be noted that the support rod 1 should be roughly processed into straight wood in this embodiment, rather than curved wood.

[0025] In this embodiment, the elastic plate 2 can be made of rubber and has a hole for the strut 1 to pass through; the elastic plate 2 is penetrated by the strut 1. The pressure ring 3 is annular and is also penetrated by the strut 1 (i.e., passes through the ring), and the pressure ring 3 is located on the side of the elastic plate 2 away from the steel template. The locker 4 is used to lock the pressure ring 3 and the strut 1, that is, to fix the position of the pressure ring 3 relative to the strut 1.

[0026] Before fixing the above-mentioned pressure ring 3, the present application needs to first fill / inject glass glue and sealant between the elastic plate 2 and the steel formwork to form a leveling layer. The leveling layer strengthens the seal on the one hand, and is used to reduce the impact of the curvature inside the steel formwork on the other hand. After all, the tunnel wall is curved. If the pressure ring 3 is directly pressed, there will be a gap, and the elastic plate 2 will be bent and deformed, and the gap between it and the outer wall of the support rod 1 will be too large.

[0027] According to the above configuration, the gaps caused by the setting of the support rod 1 can be sealed by using the leveling layer in cooperation with the elastic plate 2, and the elastic plate 2 can be pressed with the pressure ring 3, and the pressure ring 3 can be locked with the locker 4, so that the present application can reduce the risk of leakage during the lining construction of the underground excavation section of the station.

[0028] Reference Figure 1 The side of the elastic plate 2 is formed with a skirt, which extends toward the steel template. When the elastic plate 2 covers the steel template, the skirt contacts the steel template, and a certain cavity exists between the elastic plate 2 and the steel template, and the cavity is used to accommodate glass glue, etc., so as to form a leveling layer.

[0029] An injection tube 21 is fixed on the elastic plate 2, and the injection tube 21 connects the front and back sides of the elastic plate 2. A one-way valve is fixed in the injection tube 21. The one-way valve 21 allows liquid to flow from the side of the elastic plate 2 away from the steel template to the above-mentioned cavity through the injection tube 21, but cannot flow back.

[0030] The provision of the injection tube 21 can make the layout of the leveling layer simpler. For example, after the elastic plate 2 is initially fixed, a syringe is inserted into the injection tube 21, and then the syringe is pushed to inject the glass glue stored therein into between the elastic plate 2 and the steel template. Because it is a one-way valve structure, there is no need to consider the sealing problem after injection.

[0031] Reference Figure 1 The pressure ring 3 includes two mutually symmetrical half rings 31 , and a connecting plate 32 is extended from the end of the half ring 31 toward a side away from the elastic plate 2 , and a through hole is opened in the connecting plate 32 .

[0032] The structural design of the above-mentioned pressure ring 3 allows it to be installed by splicing, which is more convenient to use, and the two parts can have a height difference relative to each other when necessary, which is more in line with the tunnel arc surface design; and because of the setting of the connecting plate 32, the two half rings 31 can be spliced ​​and then tied and fixed with iron wire passing through the through hole, and the locking device 4 can be used to enhance the positioning and fixing effect.

[0033] Reference Figure 1 The locking device 4 includes a positioning rod 41, a base plate 42 and a push rod 43.

[0034] The support rod 1 penetrates the base plate 42, or in other words, the base plate 42 is ring-shaped; during installation, after the base plate 42 is placed, a small drill is used to drill along the preset radial holes on the base plate 42 until the support rod 1 is opened; then the positioning rod 41 penetrates the base plate 42 and the support rod 1, and the push rod 43 is multiple and arranged around the base plate 42; the push rod 43 penetrates the base plate 42 and is threadedly connected with a nut 44, the nut 44 at least contacts the side of the base plate 42 facing the pressure ring 3, and the push rod 43 contacts the half ring 31.

[0035] According to the above arrangement, the staff can position and fix the pressure ring 3 by adjusting the position of the push rod 43 relative to the base plate 42; at the same time, when necessary, in order to fit the curved surface of the tunnel, the lengths of different push rods 43 can be changed to meet the positioning requirements of the semi-ring 31 in a slightly bent state.

[0036] The above-mentioned nut 1 44 can also be provided with two on one push rod 43 , and the two nuts 1 44 are respectively located at the front and back sides of the base plate 42 .

[0037] Although after the top rod 43 is adjusted to a good position, the base plate 42 applies force to the positioning rod 41, and the positioning rod 41 generally does not fall off the support rod 1, considering that the concrete is vibrated after pouring, which causes the support rod 1 to vibrate, in order to prevent the positioning rod 41 from falling off due to vibration, a nut 45 is threadedly connected to the positioning rod 41, and there are two nuts 45, which are respectively located on both sides of the base plate 42.

[0038] In one embodiment of the present application, the half ring 31 is a magnetizable plate, such as a thin iron metal plate, and one end of the push rod 43 that abuts against the half ring 31 is a permanent magnet.

[0039] The above arrangement can preliminarily position the half ring 31 when the two half rings 31 are not tied relative to each other with wire; moreover, because of the existence of the steel template, the elastic plate 2 can be preliminarily clamped and fixed with the magnetized half ring 31 in the early stage, which is convenient for installing the present application.

[0040] In one embodiment of the present application, the present application further includes a thin film pressure sensor, which is adhesively fixed to a side of the half ring 31 facing the elastic plate 2 .

[0041] The usage of thin film pressure sensor is:

[0042] The signals of the film pressure sensors installed in the entire tunnel section to be constructed are collected by a data acquisition card, and then transmitted back to the on-site host computer or uploaded to the pan-tilt head through a network card; the staff judges which section the concrete has been poured to based on the pressure feedback from each film pressure sensor, and judges whether the concrete pouring is sufficient based on the feedback, and evaluates the concrete overflow pressure at each support rod 1 position.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A support structure for a dark-excavated tunnel station of an urban rail transit, characterized in that: include: A support rod (1) passes through the steel formwork and is used to support the steel frame of the initial support and lining stand; An elastic plate (2) which is penetrated by the support rod (1) and is located on the side of the steel formwork facing the center of the tunnel; a pressure ring (3) which is penetrated by the support rod (1) and is pressed against the side of the elastic plate (2) facing away from the steel formwork; and A locking device (4) for locking the pressure ring (3) and the support rod (1); Wherein, the elastic plate (2) and the steel formwork are provided with a leveling layer.

2. The urban rail dark-bored tunnel station support structure according to claim 1 is characterized by: The side of the elastic plate (2) is provided with a skirt, the skirt extending towards the steel template, the elastic plate (2) is provided with an injection tube (21), the injection tube (21) extending in a direction away from the steel template, the injection tube (21) is connected to the front and back sides of the elastic plate (2), the injection tube (21) is installed with a one-way valve and the connection direction is towards one end of the steel template.

3. The urban rail dark-bored tunnel station support structure according to claim 1 is characterized in that: The pressure ring (3) comprises two mutually symmetrical half rings (31), a connecting plate (32) extending from the end of the half ring (31) towards a side away from the elastic plate (2), and a through hole is formed on the connecting plate (32).

4. The urban rail dark-bored tunnel station support structure according to claim 3 is characterized in that: The locking device (4) comprises a positioning rod (41), a base plate (42) and a push rod (43); the support rod (1) penetrates the base plate (42); the positioning rod (41) penetrates the base plate (42) and the support rod (1); the push rod (43) is in plurality and is arranged around the base plate (42); the push rod (43) penetrates the base plate (42) and is threadedly connected with a nut (44); the nut (44) at least contacts a side of the base plate (42) facing the pressure ring (3); and the push rod (43) contacts the half ring (31).

5. The urban rail dark-bored tunnel station support structure according to claim 4 is characterized in that: The positioning rod (41) is threadedly connected with a second nut (45), and the second nut (45) is two and is respectively located on two sides of the base plate (42).

6. The urban rail dark-bored tunnel station support structure according to claim 4 is characterized in that: The half ring (31) is a magnetizable plate, and one end of the top rod (43) that contacts the half ring (31) is a permanent magnet.

7. The urban rail dark-bored tunnel station support structure according to claim 4 is characterized by: It also comprises a thin film pressure sensor, which is arranged on a side of the half ring (31) facing the elastic plate (2).

Images