Shield integral type arrival receiving device and construction method employing same

Abstract

The invention provides a shield integral type arrival receiving device, which is arranged in a foundation pit active well on the outer side of a shield arrival tunnel ring and comprises a lower shell and an upper shell, wherein the bottom part of the lower shell is arranged on a base at the bottom of the active well; one end part of the lower shell is connected with a pre-embedded steel plate on a lining wall of the active well; the upper shell is arranged above the lower shell; the bottom part of the upper shell is connected with the lower shell; one end of the upper shell is connected with the pre-embedded steel plate; the upper shell and the lower shell form an integral sealing space; a water discharge port is arranged on the lower shell; a water inlet, an air outlet, a pressure gage and an observation hole are arranged on the upper shell; and the upper shell and the lower shell are provided with a safety overflow valve respectively. The invention also provides a construction method employing the shield integral type arrival receiving device. By the device and the construction method, phenomena such as water leakage, mud leakage and the like of the tunnel ring can be effectively prevented, so the risk of shield arrival is reduced, and the cost of shield arrival is effectively saved.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction in construction engineering, and relates to a shield integrated arrival receiving device and a construction method using the device. Background technique [0002] The shield tunneling method is a construction method for underground tunnel excavation in soft soil stratum. The working shaft is used to enable the shield tunneling machine to carry out construction along the predetermined tunnel axis and elevation position. Due to the small impact on the ground structure and no adverse impact on the environment, the shield tunneling method construction technology has the advantages of low labor intensity, high degree of mechanization, fast project progress, accurate tunnel shape, and high quality. important construction techniques. [0003] The existing shield arrival and reception methods generally include three parts: 1. First, use appropriate stratum reinforcement methods to reinforce a...

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Problems solved by technology

[0003] The existing shield arrival and reception methods generally include three parts: 1. First, use appropriate stratum reinforcement methods to reinforce and improve the soil at the shield tunnel arrival section within a certain range around the foundation pit; The groundwater level outside the pit and at the arrival section of the shield machine is hydraulically lowered, so as to prevent groundwater from pouring into the receiving foundation pit from the gap during the receiving process of the shield machine, causing damage; 3. Generally, the shield machine reaches the reserved hole circle position in the foundation pit Install a ring of sealing water-stop washer to ensure the safety of the shield tunnel receiving. Although the hole ring sealing gasket has a certain sealing effect, if the soil reinforcement is not good and the precipitation is not in place, it is easy to leak. In addition, the sealing ring is in the shield. When the mechanism enters the working well, problems such as valgus and damage are prone to occur, which also lead to water leakage and mud leakage in the hole ring. Once damage occurs and leakage occurs, it is very difficult to deal with it on site, and it is easy to cause engineering accidents

[0004] In the existing shield tunneling method construction, the technical difficulty of shield tunneling when it arrives and receives is high, there are many safety hazards, and it is prone to collapse, water leakage, etc.

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