Adjustable double-water-stop device for pipe jacking out of hole

Abstract

The utility model relates to an adjustable double-water-stop device for pipe jacking out of a hole. The adjustable double-water-stop device comprises a steel sleeve, a ring beam water-stop rubber plate, an inclined pressing ring beam and a water pressure automatic adjusting water-stop rubber ring. The steel sleeve is pre-buried in a hole of a pipe jacking working well, the inclined pressing annular beam is arranged on one side of the steel sleeve, the annular beam water stopping rubber plate is vertically arranged between the steel sleeve and the inclined pressing annular beam, and the water pressure automatic adjusting water stopping rubber ring is arranged between the inclined pressing annular beam and a pipe jacking. According to the utility model, the double-water-stop device capable of being adjusted when the jacking pipe goes out of the hole is arranged, so that the failure of the water-stop device caused by overlarge underground water pressure is prevented, and the smooth completion of the jacking pipe is ensured.

Description

Technical Field

[0001] The utility model relates to the field of pipe jacking engineering, in particular to a double water-stopping device with adjustable pipe jacking hole. Background Art

[0002] Pipe jacking construction is a type of trenchless construction for underground pipelines. Pipe jacking construction in dark excavation projects has the advantages of general adaptability to hydrogeological strata, little interference with above-ground and underground buildings and facilities, little environmental impact in the construction area, safe construction, reliable quality, and good comprehensive economic benefits. Before the start of pipe jacking, a water-stopping device needs to be arranged at the opening of the working well. The water-stopping device has two main functions: one is to prevent groundwater from leaking through the opening of the pipe jacking, causing the risk of ground subsidence and collapse caused by groundwater loss; the other is to prevent the thixotropic mud injected into the outer wall of the pipe jacking from leaking, better forming a drag-reducing mud thixotropic sleeve, and greatly reducing the friction resistance between the pipeline and the soil or rock mass; therefore, the stable operation of the water-stopping device can greatly improve construction efficiency and ensure construction safety.

[0003] Under normal circumstances for pipe jacking, it is only necessary to install an ordinary single-layer or double-layer waterstop ring device at the starting hole of the working shaft to meet the construction requirements. However, when the groundwater level is high and the groundwater is connected to rivers, lakes and seas, especially in the construction conditions of underwater pipe jacking, it is urgent to solve the water-stop sealing effect of the waterstop device on site to prevent excessive groundwater pressure or a sudden surge in water pressure from causing the waterstop ring sealing to fail.

[0004] Especially for long and short distance underwater rock pipe jacking in reservoirs, lakes and seaside towards rocky mountains (slopes), underwater rock pipe jacking without underwater receiving wells places higher requirements on the water-stopping device for the pipe exiting the hole. Summary of the invention

[0005] The utility model aims to overcome the defects of the prior art and provide an adjustable double water-stop device for a jacking pipe to solve the problem that the sealing of the water-stop ring may fail due to underground water pressure or sudden surge of water pressure when the jacking pipe is coming out of the hole.

[0006] In order to solve the above technical problems, the utility model is achieved as follows:

[0007] An adjustable double water-stopping device for a jacking pipe exiting a hole is characterized in that it comprises a steel casing, a ring beam water-stopping rubber plate, an oblique pressure ring beam, and a water-stopping rubber ring that automatically adjusts water pressure; the steel casing is pre-buried in the hole opening of the jacking pipe working well, the oblique pressure ring beam is arranged on one side of the steel casing, a ring beam water-stopping rubber plate is vertically arranged between the steel casing and the oblique pressure ring beam, and the water-stopping rubber ring that automatically adjusts water pressure is arranged between the oblique pressure ring beam and the jacking pipe.

[0008] The double water-stopping device with adjustable top pipe exit hole is characterized in that the ring beam water-stopping rubber plate and the oblique pressure ring beam are connected and fixed by fastening bolts.

[0009] The double water-stopping device with adjustable top pipe exit hole is characterized in that it also includes upper and lower adjustable pressure plates, which are arranged on the outside of the oblique pressure annular beam, and the oblique pressure annular beam and the upper and lower adjustable pressure plates are connected and fixed by fastening bolts.

[0010] The adjustable double water-stopping device for the top pipe exit hole is characterized in that it also includes a reinforced elastic water-stopping rubber plate, which is arranged between the oblique pressure annular beam and the upper and lower adjustable pressure plates, and its lower end is against the top pipe.

[0011] The adjustable double water-stop device for the top pipe exit hole is characterized in that it also includes a one-way grouting valve for the top pipe, which is arranged on the inner wall of the top pipe.

[0012] The beneficial effects of the utility model are as follows: It can be seen from the above technical solution that the present application provides an adjustable double water stop device for jacking pipes out of the hole, and by setting an adjustable double water stop ring, it is possible to solve the problem of excessive groundwater pressure or sudden surge in water pressure to avoid the occurrence of water stop ring sealing failure;

[0013] The up and down adjustable pressure plate can better adapt to the displacement changes of the pipeline in the process of pipe jacking, which is more conducive to the completion of pipe jacking correction. At the same time, the appropriate up and down adjustment of different annular pressure plates can avoid the gap between the pressure plate and the pipeline being too large, which may cause the water stop rubber plate to leak.

[0014] In the early stage, the maximum working water pressure test of the water stop device can be carried out in advance using the one-way grouting valve of the top pipe. In the later stage, the double water stop device can automatically adjust the water stop rubber ring by appropriately increasing the grouting pressure to replace the reinforced elastic water stop rubber plate behind it.

[0015] The stable operation of the water-stop device can greatly improve construction efficiency and ensure construction safety.

[0016] This application not only achieved the expected design goals, but also received high recognition from all parties involved in the construction. The promotion and application of the technical ideas of the invention device and the comprehensive benefits generated are the value embodiment of the company's ability to improve its core competitiveness in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:

[0018] Figure 1 This is a schematic diagram of the double water-stop structure.

[0019] Figure 2 This is an overall schematic diagram of this application.

[0020] Figure 3 for Figure 2 Center 1-1 view. DETAILED DESCRIPTION

[0021] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection requested by the present application.

[0022] like Figure 1 , 2 As shown in Figure 3: A double water-stop device with adjustable function for jacking pipes to exit the hole, comprising a steel casing 1, a ring beam water-stop rubber plate 2, an inclined pressure ring beam 3, and a water-pressure automatic water-stop rubber ring 5; the steel casing is pre-buried in the hole of the jacking working well, the inclined pressure ring beam is arranged on one side of the steel casing, a ring beam water-stop rubber plate is vertically arranged between the steel casing and the inclined pressure ring beam, a water-stop rubber ring with automatic water pressure adjustment is arranged between the inclined pressure ring beam and the jacking pipe, and the water-stop rubber ring with automatic water pressure adjustment is installed in place before the jacking machine exits the hole. The water-pressure automatic water-stop rubber ring is achieved by gradually compressing the rubber ring to tighten under the action of different water pressures through the inclined pressure plate of the inclined pressure ring beam, which plays an automatic adjustment role in water-stopping under different water pressures, and is particularly suitable for surges in water pressure (for example, surges in groundwater pressure caused by the connection of underwater jacking pipes with rivers, lakes, and seas);

[0023] The ring beam water-stopping rubber plate and the oblique pressure ring beam are connected and fixed by fastening bolts.

[0024] It also includes an upper and lower adjustable pressing plate 7, which is arranged on the outside of the oblique pressing annular beam, and the oblique pressing annular beam and the upper and lower adjustable pressing plate are connected and fixed by fastening bolts 4. The upper and lower adjustable pressing plate is adjusted up and down by appropriately loosening and tightening the fastening bolts of the oblique pressing annular beam with a small hammer and a crowbar, and is usually adjusted with a small hammer;

[0025] Setting up an annular upper and lower adjustable pressure plate can better adapt to the displacement changes of the pipeline in the process of pipe jacking, which is more conducive to the completion of pipe jacking correction. At the same time, adjusting different annular pressure plates up and down can avoid the gap between the pressure plate and the pipeline being too large, which will cause the water stop rubber plate to leak.

[0026] It also includes a reinforced elastic waterproof rubber plate 6, which is arranged between the oblique pressure annular beam and the upper and lower adjustable pressure plates, and its lower end is against the top pipe. The upper and lower adjustable pressure plates and the reinforced elastic waterproof rubber plate are fixed by the fastening bolts of the oblique pressure annular beam; the reinforced elastic waterproof rubber plate is made by adding a reinforced elastic material to the tail of the rubber plate to ensure that the waterproof rubber plate tightly hugs the top pipe to enhance the pressure at the contact point and further play a waterproof role;

[0027] It also includes a one-way grouting valve 8 for the top pipe, which is arranged on the inner wall of the top pipe.

[0028] In the early stage, the maximum working water pressure test of the water stop device can be carried out in advance using the one-way grouting valve of the top pipe. In the later stage, the double water stop device can automatically adjust the water stop rubber ring by appropriately increasing the grouting pressure to replace the reinforced elastic water stop rubber plate behind it.

[0029] The construction process of this application is as follows: pre-buried steel casing of the opening → installation of ring beam with water-stop rubber plate → installation of inclined pressed ring beam → tightening bolts of pre-buried steel casing → installation of water pressure automatic adjustment water-stop rubber ring → installation of reinforced elastic water-stop rubber plate → installation of upper and lower adjustable pressure plates → tightening bolts of ring beam → jacking machine head out of the hole → adjustment of position of upper and lower adjustable pressure plates → installation of pipeline one-way grouting valve → jacking of first section of pipeline → maximum working water pressure test → qualified → jacking construction → appropriate adjustment of upper and lower adjustable pressure plates → completion of jacking → mud replacement of pipeline one-way valve → removal of water-stop device.

[0030] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A double water-stop device with adjustable top pipe exit hole, characterized in that: It includes a steel casing, a ring beam water-stop rubber plate, an oblique pressure ring beam, and a water-stop rubber ring that automatically adjusts water pressure; the steel casing is pre-buried in the opening of the top pipe working well, the oblique pressure ring beam is arranged on one side of the steel casing, a ring beam water-stop rubber plate is vertically arranged between the steel casing and the oblique pressure ring beam, and the water-stop rubber ring that automatically adjusts water pressure is arranged between the oblique pressure ring beam and the top pipe.

2. The double water-stopping device with adjustable top pipe exit hole according to claim 1, characterized in that: The ring beam water-stopping rubber plate and the oblique pressure ring beam are connected and fixed by fastening bolts.

3. The double water-stopping device with adjustable top pipe exit hole according to claim 1 is characterized by: It also includes upper and lower adjustable pressing plates, which are arranged on the outside of the oblique pressing annular beam. The oblique pressing annular beam and the upper and lower adjustable pressing plates are connected and fixed by fastening bolts.

4. The double water-stopping device with adjustable top pipe exit hole according to claim 1, characterized in that: It also includes a reinforced elastic water-stopping rubber plate, which is arranged between the oblique pressure annular beam and the upper and lower adjustable pressure plates, and the lower end of the plate is against the top pipe.

5. The double water-stopping device with adjustable top pipe exit hole according to claim 1, characterized in that: It also includes a one-way grouting valve for the top pipe, which is arranged on the inner wall of the top pipe.

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