Horizontal pipe connecting device for inside and outside of steel sleeve of shield

Abstract

The present application relates to a kind of shield steel sleeve inside and outside horizontal freezing pipe connecting device, including outer sleeve pipe, inner connecting pipe, flange cover, outer sleeve pipe is placed in the upper portion of shield steel sleeve standard section cylinder outer wall, its top is equipped with flange, inner connecting pipe passes through outer sleeve pipe and steel sleeve cylinder wall and is connected with outer sleeve pipe flange cover, flange cover covers outer sleeve pipe after inner connecting pipe is removed to thereby seal outer sleeve pipe.The present application is by being provided with outer sleeve pipe, inner connecting pipe and flange cover, when shield receiving adopts steel sleeve and portal horizontal freezing, freezing pipe in the range of hole circle can be quickly disconnected, reconnect, avoid in the process of steel sleeve installation, portal freezing interruption time is too long, guarantee portal freezing quality and steel sleeve installation quality;Freezing pipe in hole circle stops freezing and removes inner connecting pipe, and outer sleeve pipe is sealed by flange cover, guarantee the sealing property of steel sleeve.

Description

Technical Field

[0001] This invention relates to a shield steel sleeve for tunnel construction, and more particularly to a connection device for horizontal freezing pipelines inside and outside the shield steel sleeve. Background Technology

[0002] During shield tunnel construction, shield receiving is a significant risk, especially in water-rich or soft strata. Common end shaft reinforcement measures include cement reinforcement and surface dewatering. However, in areas with poor geological conditions and complex surrounding environments, cement reinforcement or surface dewatering is often not ideal. To further control the risk, freezing reinforcement can be added, supplemented by steel sleeve receiving technology.

[0003] End well freezing reinforcement mainly includes two types: vertical freezing and horizontal freezing. When ground conditions are limited or geological conditions are poor, horizontal freezing is more suitable.

[0004] A steel sleeve is a closed cylinder, typically consisting of a transition ring, several standard cylinder sections, a rear end cap, and a reaction frame system. The transition ring, standard cylinder sections, and rear end cap are usually divided into upper and lower parts. During installation, the lower part is installed first, followed by the upper part. Before installing the upper part, the horizontal freezing pipeline within the tunnel lining needs to be temporarily disconnected. After the upper part is installed, holes are cut in the steel sleeve to reconnect the freezing pipeline and restore freezing. The disconnection and reconnection of the pipeline usually takes several days. During this period, the freezing inside the tunnel lining is in a stopped-freezing state, significantly affecting the overall freezing quality and efficiency of the tunnel entrance. Furthermore, if the cut holes are not properly sealed, it will affect the overall sealing of the steel sleeve, adversely impacting subsequent receiving and construction work.

[0005] Therefore, it is necessary to develop a device for connecting the internal and external horizontal freezing pipelines of the shield tunnel steel sleeve with good convenience and sealing performance. Summary of the Invention

[0006] To overcome the shortcomings of existing construction technologies, this invention provides a connection device for the inner and outer horizontal freezing pipelines of a shield tunnel steel sleeve. The freezing pipelines can be quickly disconnected and reconnected through a pre-installed outer sleeve and an inner connecting pipe that can be flexibly installed and removed. The steel sleeve can be quickly sealed through a flange cover, thereby improving the quality and efficiency of freezing construction and steel sleeve installation.

[0007] To achieve the above objectives, the solution of the present invention is: a connection device for horizontal freezing pipelines inside and outside a shield tunnel steel sleeve, comprising an outer sleeve, an inner connecting pipe, and a flange cover. The outer sleeve is placed on the upper part of the outer wall of the standard section of the shield tunnel steel sleeve, and a flange is provided at the top of the outer sleeve. The inner connecting pipe passes through the outer sleeve and the wall of the steel sleeve and is connected to the flange of the outer sleeve. After the inner connecting pipe is removed, the flange cover covers the outer sleeve, thereby sealing the outer sleeve.

[0008] Furthermore, the outer sleeve is placed on the upper part of the outer wall of the standard section of the shield tunneling steel sleeve near the tunnel portal. The shield tunneling steel sleeve wall at the connection point has an opening with a diameter identical to the inner diameter of the outer sleeve. The bottom of the outer sleeve is welded to the outer surface of the shield tunneling steel sleeve wall.

[0009] Furthermore, the inner connecting pipe includes an upper section and a lower section. The upper section has a flange in the middle, and its outer diameter and bolt hole specifications are the same as those of the top flange of the outer casing, which is used for a stable connection between the inner connecting pipe and the flange of the outer casing.

[0010] Furthermore, the upper section pipe is connected to the collection and distribution ring of the shield tunnel portal via a high-pressure rubber hose, and the lower section pipe is connected to the freezing supply pipe within the shield tunnel portal via a high-pressure rubber hose.

[0011] Furthermore, the upper and lower pipe sections are connected by threads to form a closed shield tunnel portal freezing connection pipeline.

[0012] Furthermore, before the flange is covered, a sealing gasket is placed on the flange of the outer sleeve.

[0013] The beneficial effects of this invention include:

[0014] 1) The outer sleeve is placed on the upper part of the outer wall of the standard section of the steel sleeve near the tunnel entrance and is welded to the outer surface of the sleeve wall. It does not need to be removed and can be reused together with the steel sleeve body to maintain the durability of the device.

[0015] 2) The upper and lower sections of the inner connecting pipe are pre-installed on the freezing pipeline within the hole ring area. When disconnection is required, the pipeline gate valve can be directly closed, the liquid supply can be stopped, and then the pipe can be directly reconnected through the outer casing to restore freezing. The inner connecting pipe can be reused after removal, thus maintaining the durability and flexibility of the device.

[0016] 3) After the freezing construction is completed and the frozen pipeline inside the tunnel ring is removed, remove the inner connecting pipe, cover the outer sleeve with a sealing gasket and flange cover, tighten the bolts, and restore the sealing performance of the steel sleeve. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the installation of the shield tunnel steel sleeve inner and outer horizontal freezing pipe connection device of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall structure of the shield tunnel steel sleeve inner and outer horizontal freezing pipeline connection device of the present invention.

[0019] Figure 3 This is a schematic diagram of the outer casing.

[0020] Figure 4 This is a schematic diagram of the overall structure of the internal connecting pipe;

[0021] Figure 5 This is a schematic diagram of the upper section pipe structure;

[0022] Figure 6 This is a schematic diagram of the flange cover structure. Detailed Implementation

[0023] The present invention will be further described below with reference to the examples shown in the accompanying drawings.

[0024] like Figure 1 As shown in the figure, an embodiment of the present invention provides a connection device for the inner and outer horizontal freezing pipelines of a shield tunnel steel sleeve, including an outer sleeve 10, an inner connecting pipe 11, and a flange cover 7. Specifically:

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the outer sleeve 10 is installed on the upper part of the outer wall of the standard section cylinder 12 of the shield tunnel steel sleeve near the tunnel entrance. The cylinder wall at the connection position is provided with a hole, the diameter of which is the same as the inner diameter of the tube body 1 of the outer sleeve 10. The bottom of the tube body 1 of the outer sleeve 10 is welded to the outer surface of the outer wall of the standard section cylinder 12 of the steel sleeve. The top of the outer sleeve 10 is provided with a flange 2, the height of which does not exceed the height of the outer rib plate of the standard section cylinder 12 of the steel sleeve.

[0026] like Figure 1 , Figure 2 and Figure 4 As shown, the inner connecting pipe 11 includes an upper section pipe 3 and a lower section pipe 4. The outer diameter of the upper section pipe 3 and the lower section pipe 4 is smaller than the inner diameter of the pipe body 1 of the outer sleeve 10. The upper section pipe 3 and the lower section pipe 4 are threaded together after passing through the pipe body 1 of the outer sleeve 10 and the cylinder wall of the standard section cylinder 12 of the steel sleeve.

[0027] like Figure 1 , Figure 4 and Figure 5 As shown, a flange 6 is provided in the middle of the upper section pipe 3. The outer diameter and bolt hole specifications of the flange 6 are the same as those of the outer flange 2. After the upper section pipe 3 is connected to the lower section pipe 4, the inner connecting pipe is fixed by bolts connecting the flange 6 of the upper section pipe to the flange 2 of the outer flange. The upper end of the upper section pipe 3 is connected to the frozen liquid collection and distribution ring of the shield tunnel entrance through the upper high-pressure rubber hose 13.

[0028] like Figure 1 and Figure 4 As shown, the upper end of the lower section pipe 4 is connected to the lower end of the upper section pipe 3 by a thread, and the lower end of the lower section pipe 4 is connected to the liquid supply pipe within the tunnel portal ring area of ​​the shield tunnel through the lower high-pressure rubber hose 14, forming a complete closed freezing liquid supply pipeline.

[0029] like Figure 6 As shown, after the frozen pipeline is removed inside the tunnel ring and before the shield is received, the flange cover 7 covers the outer sleeve flange 2, with a sealing gasket 9 in the middle, and is fastened by bolts 8, thereby sealing the outer sleeve 10 and restoring the sealing performance of the steel sleeve.

[0030] After completing the above implementation process, the following features of the present invention should be evident:

[0031] The device of this invention addresses the shortcomings of the process of horizontal freezing of shield tunnel portals supplemented by steel sleeve receiving, such as long disconnection time of horizontal freezing pipeline inside the tunnel ring and poor sealing of newly opened holes. It can quickly realize the disconnection and reconnection of freezing pipeline, and can quickly restore the sealing of steel sleeve after the freezing pipeline is removed. It is reusable and can effectively ensure the quality of freezing reinforcement and the sealing quality of steel sleeve.

[0032] The above description of the embodiments is provided to enable those skilled in the art to understand and apply the present invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A connection device for horizontal freezing pipelines inside and outside a shield tunnel steel sleeve, characterized in that: The system includes an outer sleeve, an inner connecting pipe, and a flange cover. The outer sleeve is positioned on the upper part of the outer wall of the standard section of the shield tunneling steel sleeve, and a flange is provided at the top of the outer sleeve. The inner connecting pipe passes through the outer sleeve and the steel sleeve wall and connects to the flange of the outer sleeve. The flange cover covers the outer sleeve after the inner connecting pipe is removed, thereby sealing the outer sleeve. The outer sleeve is positioned on the upper part of the outer wall of the standard section of the shield tunneling steel sleeve near the tunnel entrance. An opening is provided in the steel sleeve wall at the connection point, with the diameter of the opening being the same as the inner diameter of the outer sleeve. The bottom of the outer sleeve is welded to the outer surface of the steel sleeve wall. The inner connecting pipe includes an upper section and a lower section. A flange is provided in the middle of the upper section, and its outer diameter and bolt hole specifications are the same as those of the flange at the top of the outer sleeve, for a stable connection between the inner connecting pipe and the flange of the outer sleeve.

2. The shield tunneling steel sleeve inner and outer horizontal freezing pipeline connection device according to claim 1, characterized in that: The upper section pipe is connected to the collection and distribution ring of the shield tunnel portal via a high-pressure rubber hose, and the lower section pipe is connected to the freezing supply pipe within the shield tunnel area via a high-pressure rubber hose.

3. The shield tunneling steel sleeve inner and outer horizontal freezing pipeline connection device according to claim 1, characterized in that: The upper and lower pipe sections are connected by threads to form a closed shield tunnel portal freezing connection pipeline.

4. The shield tunneling steel sleeve inner and outer horizontal freezing pipeline connection device according to claim 1, characterized in that: Before the flange is covered, a sealing gasket is placed on the flange of the outer sleeve.

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