Inverted pulling device of shield tunneling machine

Abstract

The utility model discloses an inverted pulling device of a shield tunneling machine, which comprises a counter-force frame system for pulling the shield tunneling machine to retreat, the counter-force frame system comprises a working well lining wall, a plurality of retreating supports arranged on the working well lining wall, jack groups arranged on the retreating supports, and a cross beam positioned in the working well lining wall, the traction beams are welded to one end of the shield tunneling machine, the other ends of the traction beams are connected with the cross beam in a welded mode, the oil pump vehicle controls a jack set oil cylinder to jack the cross beam, the oil pump vehicle controls the jack set oil cylinder to jack the cross beam and counteracts on a lining wall of a working well through a retreating support, and the shield tunneling machine is dragged to retreat; the shield tunneling machine upside-down pulling device has the advantages that several kinds of simple profile steel, the oil pressure pump and the matched jack are adopted, shield tunneling machine upside-down pulling construction is completed, environmental influence is small, operation is easy and convenient, and treatment cost is low; and labor can be saved, the construction progress is accelerated, cost is saved, and practical engineering use proves that the requirements for strength, rigidity and stability can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of urban rail transit engineering, and particularly relates to a device for pulling out a shield machine in reverse. Background Art

[0002] A shield machine, the full name of which is a shield tunnel boring machine, is a tunnel boring machine using the shield method; it is mainly used for tunnel boring projects and can build a supporting structure of the tunnel while boring. This construction method is different from the open construction method; shield machines are widely used in tunnel projects such as urban subways, railways, highways, and hydropower; especially in strata with complex geological conditions and difficult construction, shield machines can give full play to their unique advantages to ensure the safety and efficiency of tunnel boring.

[0003] In the construction of urban rail transit, most interval tunnels are constructed by the shield method. The shield machine cannot normally bore during the starting stage due to mechanical failures or factors such as geological conditions. Under such special working conditions, it is often restricted by the surrounding environment and cannot be processed, or the processing cost is too high; it is not conducive to solving the problem of dealing with shield machines under special working conditions. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for pulling out a shield machine in reverse, which can pull out the shield machine that has already started and completely entered the interval tunnel and shift the shield machine to the shield machine starting device in the working well.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A device for pulling out a shield machine in reverse includes a reaction frame system for pulling the shield machine backward. The reaction frame system includes the inner lining wall of the working well, a plurality of backward supports installed on the inner lining wall of the working well, a jack group installed on the backward supports, a cross beam located inside the inner lining wall of the working well, a plurality of traction beams welded to one end of the shield machine, the other end of the traction beam is welded to the cross beam, an oil pump truck for controlling the oil cylinders of the jack group to push the cross beam, and the oil pump truck controls the oil cylinders of the jack group to push the cross beam and reacts on the inner lining wall of the working well through the backward supports to pull the shield machine backward.

[0006] Preferably, the traction beam is a 40# I-beam; the cross beam is a triple combination of 40# H-beams.

[0007] Preferably, the backward support is composed of a plurality of φ609mm steel pipes with a length of 90 cm.

[0008] Preferably, it further includes a backstop system for limiting and controlling the shield machine, and the backstop system is composed of 2 jacks and φ609mm steel pipe supports.

[0009] Preferably, it further includes a shield machine base and a φ48mm first steel pipe placed on the shield machine base.

[0010] Preferably, the steel pipe support is placed on the first steel pipe.

[0011] Preferably, it further includes a pre-embedded hole ring arranged in the well structure inside the working well.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] Using several simple types of steel sections, oil hydraulic pumps and supporting jacks to complete the reverse extraction construction of the shield machine, it is less affected by the environment, simple and easy to operate, and has low treatment costs;

[0014] It can save labor, speed up the construction progress, and save costs. Through actual engineering use, it is proved that it can meet the requirements of strength, stiffness and stability. Description of the Drawings

[0015] Figure 1 It is a plan view of the reverse extraction construction of the shield machine of the present utility model;

[0016] Figure 2 It is a side view of the reverse extraction construction of the shield machine of the present utility model;

[0017] Figure 3 It is an end view of the reverse extraction construction of the shield machine of the present utility model;

[0018] In the figure: 1, Larssen steel sheet pile; 2, shield machine; 4, cross beam; 5, towing beam; 6, jack group; 7, reverse support; 9, inner lining wall of the working well; 11, pre-embedded hole ring in the well structure; 12, shield machine base; 13, steel pipe support; 14, jack; 16, first steel pipe. Specific Embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0020] Figure 1Schematic plan view of the reverse extraction construction of the shield machine of the present utility model; before the reverse extraction construction, a protection measure of sheet pile 1 is taken in front of the reinforcement area; in order to retreat the shield machine 2 into the working shaft, a fabricated reaction frame system is used to pull the shield machine 2 to retreat; the reaction frame system consists of a traction beam 5, a cross beam 4, a rear support 7, a jack group 6, and an oil pump truck; the traction beam 5 is made of 40# I-beam, one end is welded to the inner wall of the shield machine 2, and the other end is welded to the cross beam 4 as a whole. The cross beam 4 is composed of three 40# H-beams. An oil pump truck controls the jack group 6 to push the cross beam 4 through the cylinder and reacts on the inner lining wall 9 of the working shaft through the rear support 7 to pull the shield machine 2 to retreat. The rear support 7 is composed of multiple φ609mm steel pipes with a length of 90cm; during the retreat process of the shield machine 2 (especially in the second half of the retreat of the shield machine, the frictional resistance becomes smaller and smaller), a anti-retreat system must be used for limit control to prevent the collapse around the shield machine caused by the untimely and insufficient grouting filling due to the too fast retreat of the shield machine; an anti-retreat system is set in the retreat direction of the reaction frame. The anti-retreat system consists of 2 400t jacks 14 and φ609mm steel pipe supports 13, and the retreat speed is controlled by the retraction of the cylinder of the jack 14.

[0021] Figure 2 Schematic side view of the reverse extraction construction of the shield machine of the present utility model; the reaction frame system consists of a traction beam 5, a cross beam 4, a rear support 7, a jack group 6, and an oil pump truck; an oil pump truck controls the jack group 6 to push the cross beam 4 through the cylinder and reacts on the inner lining wall 9 of the working shaft through the rear support 7 to pull the shield machine 2 to retreat; the rear support 7 is composed of multiple φ609mm steel pipes with a length of 90cm; during the retreat process of the shield machine 2 (especially in the second half of the retreat of the shield machine, the frictional resistance becomes smaller and smaller), a anti-retreat system must be used for limit control to prevent the collapse around the shield machine 2 caused by the untimely and insufficient grouting filling due to the too fast retreat of the shield machine; an anti-retreat system is set in the retreat direction of the reaction frame. The anti-retreat system consists of 2 400t jacks 14 and φ609mm steel pipe supports 13, and the retreat speed is controlled by the retraction of the cylinder of the jack 14; the φ609mm steel pipe support 13 is placed on the φ48mm steel pipe 16, and the steel pipe 16 is placed on the shield machine seat 12. The shield machine seat 12 is a commonly used standardized product for shield construction.

[0022] Figure 3Schematic diagram of the end face of the shield machine for reverse extraction construction of the present utility model; The reaction frame system consists of a traction beam 5, a cross beam 4, a rear support 7, a jack group 6, and an oil pump truck; The traction beam 5 is made of 40# I-beam, with one end welded to the inner wall of the shield machine 2 body, and the other end welded to the cross beam 4 to form an integral body. The cross beam 4 is composed of three 40# H-beams spliced together. An oil pump truck controls the jack group 6 to push the cross beam 4 through the jack cylinders and reacts on the inner lining wall of the working shaft through the rear support 7 to pull the shield machine 2 backward. The rear support 7 consists of multiple φ609mm steel pipes with a length of 90cm; A reverse stop system is arranged in the reverse direction of the reaction frame. The reverse stop system consists of two 400t jacks 14 and a φ609mm steel pipe support 13. The reverse speed is controlled by the retraction of the jack cylinders; The φ609mm steel pipe support 13 is placed on the φ48mm steel pipe 16, and the steel pipe 16 is placed on the shield machine base 12.

[0023] Although the embodiments of the present utility model have been shown and described, see the above detailed description. For those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. The shield machine back-pulling device is characterized by: The invention comprises a reaction frame system for pulling a shield machine (2) to make it retreat, the reaction frame system comprising a working pit lining wall (9), a plurality of retreat supports (7) installed on the working pit lining wall (9), a jack group (6) installed on the retreat support (7), a cross beam (4) located inside the working pit lining wall (9), a plurality of traction beams (5) welded to one end of the shield machine (2), the other end of the traction beam (5) being welded to the cross beam (4), and an oil pump truck for controlling the oil cylinder of the jack group (6) to push the cross beam (4), the oil pump truck controlling the oil cylinder of the jack group (6) to push the cross beam (4) and reacting on the working pit lining wall (9) through the retreat support (7), thereby pulling the shield machine (2) to retreat; It also includes a stop-retraction system for limiting the position of the shield machine (2), the stop-retraction system consisting of two jacks (14) and a φ609mm steel pipe support (13); It also includes a shield machine base (12), a φ48 mm first steel pipe (16) placed on the shield machine base (12), and the steel pipe support (13) is placed on the first steel pipe (16).

2. The shield machine extraction device according to claim 1, characterized in that: The traction beam (5) is a 40# I-beam; the cross beam (4) is a combination of three 40# H-beams.

3. The shield machine extraction device according to claim 1, characterized in that: The retreat support (7) is composed of a plurality of φ609mm steel pipes with a length of 90cm.

4. The shield machine extraction device according to claim 1, characterized in that: It also includes a pre-buried hole ring (11) arranged in the well structure in the working well.

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