Auxiliary hoisting frame for large-diameter slurry shield tunnel portal steel sleeve

Abstract

The utility model provides an auxiliary hoisting frame for a large-diameter slurry shield tunnel portal steel sleeve, which is characterized in that the hoisting frame is a linear steel structure support frame, two steel sleeve lifting lugs are arranged at the bottom of one end of the hoisting frame, and the distance between the two steel sleeve lifting lugs is matched with the distance between two lifting points on a steel sleeve to be hoisted. Two counterweight lifting lugs are arranged at the bottom of the other end of the lifting frame; two main lifting lugs are arranged in the middle area of the top of the lifting frame and are symmetrically distributed by taking the center line of the lifting frame as the center, and an auxiliary lifting lug is arranged at the top of the lifting frame and is close to the counterweight lifting lug. The hoisting point of the hoisting frame is arranged on one side, the counterweight hoisting point is arranged on the other side, the hoisting frame is similar to a carrying pole beam, the upper portion of the hoisting frame is hoisted in the middle of the carrying pole beam through a crane, the two ends of the hoisting frame are kept balanced according to the balance principle, one end of the hoisting frame can extend into a tunnel portal in the hoisting process, and the hoisting process is not limited by the length of a middle plate ring beam; and the expected purpose can be achieved.

Description

Technical Field

[0001] The utility model relates to a hoisting tooling, in particular to an auxiliary hoisting frame for a large-diameter slurry shield tunnel portal steel sleeve. Background Art

[0002] With the rapid development of China's infrastructure level, the shield industry is increasingly developing towards large diameters, high difficulties and complex environments. In the construction application of large-diameter slurry shields, as a supporting device, the tunnel portal steel sleeve plays an important role in preventing the tunnel portal from collapsing during the initial launch and establishing the slurry tank pressure. When installing the steel sleeve, the hoisting of the steel sleeve is relatively important and directly affects the installation of the steel sleeve. Generally, during normal steel sleeve hoisting operations, the lifted object is directly below the hook. However, under some adverse conditions, such as when the length of the middle plate ring beam is too long and greater than the length of the steel sleeve, the steel sleeve to be hoisted will be located inside the tunnel portal, and there is no hoisting space for the steel sleeve, and hoisting cannot be carried out directly above it, which will greatly increase the installation difficulty of the steel sleeve, thereby prolonging the construction time and increasing the operation risk. Therefore, in the construction of large-diameter slurry shields, it is very important to adopt effective measures to solve the above problems. Summary of the Invention

[0003] The utility model provides an auxiliary hoisting frame for a large-diameter slurry shield tunnel portal steel sleeve according to the deficiencies of the prior art. The hoisting frame can solve the problem that the steel sleeve cannot be hoisted directly above when the middle plate ring beam is too long, thereby accelerating the hoisting operation time and reducing the safety risk during the operation.

[0004] To achieve the above technical purpose, the utility model provides an auxiliary hoisting frame for a large-diameter slurry shield tunnel portal steel sleeve. The hoisting frame is a straight-shaped steel structure support frame. At the bottom of one end of the hoisting frame, two steel sleeve lifting lugs are provided. The distance between the two steel sleeve lifting lugs matches the distance between the two lifting points on the steel sleeve to be hoisted. At the bottom of the other end of the hoisting frame, two counterweight lifting lugs are provided. In the middle area at the top of the hoisting frame, two main lifting lugs are provided. The two main lifting lugs are symmetrically arranged with respect to the center line of the hoisting frame. An auxiliary lifting lug is provided adjacent to the counterweight lifting lug at the top of the hoisting frame.

[0005] A preferred technical solution of the utility model: The length of the hoisting frame is 6 - 8m, and it is made of H-shaped steel with a width of 30 - 40cm. Between the two H-arms of the H-shaped steel, stiffening plates with a thickness of 2 - 3cm are welded at intervals of 40 - 60cm.

[0006] A preferred technical solution of the utility model: One of the steel sleeve lifting lugs is located at the end of one end of the hoisting frame, and the auxiliary lifting lug and one of the counterweight lifting lugs are located at the end of the other end of the hoisting frame.

[0007] Preferred technical solution of the present utility model: The distance between two steel sleeve lifting lugs is 1.4 - 1.6, and the distance between two counterweight lifting lugs is 0.8 - 1.2 m.

[0008] Preferred technical solution of the present utility model: The arrangement directions of the steel sleeve lifting lugs and the counterweight lifting lugs are the same, the arrangement directions of the main lifting lug and the auxiliary lifting lug are the same, and the setting directions of the main lifting lug and the steel sleeve lifting lugs and the counterweight lifting lugs are perpendicular to each other.

[0009] Preferred technical solution of the present utility model: The steel sleeve lifting lugs and the counterweight lifting lugs are made of steel plates with a thickness of 2 - 3 cm; the main lifting lug and the auxiliary lifting lug are made of steel plates with a thickness of 3 cm - 4 cm.

[0010] Beneficial effects of the present utility model:

[0011] For the lifting frame of the present utility model, the lifting points are set on one side, and counterweight lifting points are set on the other side, similar to a balance beam. The upper part is lifted by a crane in the middle of the balance beam, and the two ends use the principle of a balance to maintain balance. During the lifting process, one end of the lifting frame can be extended into the portal, and the lifting process is not restricted by the length of the middle plate ring beam, so the expected purpose can be achieved. Description of the drawings

[0012] Figure 1 is the structural schematic diagram of the present utility model;

[0013] Figure 2 is the front view of the present utility model;

[0014] Figure 3 is the side view of the present utility model;

[0015] Figure 4 and Figure 5 are the reference diagrams of the use state of the present utility model;

[0016] In the figures: 1 - lifting frame, 100 - rib plate, 2 - steel sleeve lifting lug, 3 - steel sleeve to be lifted, 300 - lifting point, 4 - counterweight lifting lug, 5 - main lifting lug, 6 - auxiliary lifting lug, 7 - counterweight, 8 - portal. Detailed implementation manners

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments. The attached Figures 1 to 5 are all the drawings of the embodiments, which are drawn in a simplified manner and are only used to clearly and concisely illustrate the purpose of the embodiments of the present utility model. The technical solutions shown in the drawings below are the specific solutions of the embodiments of the present utility model and are not intended to limit the scope of the present utility model to be protected. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0019] The embodiment provides an auxiliary lifting frame for a large-diameter slurry shield portal steel sleeve. The lifting frame 1 is a straight-shaped steel structure support frame with a length of 6 m. A lifting beam is made of H-shaped steel with a width of 300*300 mm, and stiffening plates 100 with a thickness of 2 cm are welded at intervals of 50 cm between the two H-arms of the H-shaped steel to reinforce the lifting beam and ensure its strength. At the bottom of one end of the lifting frame 1, two steel sleeve lifting lugs 2 are made of 2-cm-thick steel plates. The distance between the two steel sleeve lifting lugs 2 matches the distance between the two lifting points 300 on the steel sleeve 3 to be lifted, generally about 1.5 m apart, and is used for lifting the steel sleeve in sections. At the bottom of the other end of the lifting frame 1, two counterweight lifting lugs 4 are provided. The counterweight lifting lugs 4 are made of 2-cm-thick steel plates, and the distance between the two counterweight lifting lugs 4 is about 1 m, which is used for hanging counterweights. At the middle area of the top of the lifting frame 1, two main lifting lugs 5 are provided. The two main lifting lugs 5 are symmetrically arranged with respect to the center line of the lifting frame 1. At the top of the lifting frame 1 near the counterweight lifting lugs 4, auxiliary lifting lugs 6 are provided. The main lifting lugs 5 and the auxiliary lifting lugs 6 are made of steel plates with a thickness of 3 cm, and the distance between the two main lifting lugs 5 is about 1.5 m. One of the steel sleeve lifting lugs 2 is located at the end of one end of the lifting frame 1, and the auxiliary lifting lugs 6 and one of the counterweight lifting lugs 4 are located at the end of the other end of the lifting frame 1. The steel sleeve lifting lugs 2 and the counterweight lifting lugs 4 are arranged in the same direction, the main lifting lugs 5 and the auxiliary lifting lugs 6 are arranged in the same direction, and the setting directions of the main lifting lugs 5, the steel sleeve lifting lugs 2, and the counterweight lifting lugs 4 are perpendicular to each other.

[0020] In the embodiment, for the situation where the large-diameter slurry shield portal steel sleeve to be lifted is located inside the portal, since the middle plate ring beam of the construction project is 2850 mm wide and the steel sleeve is 2500 mm wide, the middle plate ring beam is wider than the steel sleeve, covering the lifting position of the steel sleeve. To effectively solve this problem, the conventional lifting method is not feasible, and it is necessary to consider how to make the lifting points cross the middle plate ring beam. After research, it is found that the lifting frame described in the present utility model, a tooling device similar to a lifting beam, is designed. The upper part is lifted by a crane in the middle of the lifting beam, and the two ends use the principle of a balance to maintain balance, so that it can be unrestricted by the length of the middle plate ring beam and achieve the expected purpose.

[0021] When the lifting frame in the embodiment is specifically used, as Figure 4 and Figure 5 shown, first, for the installation of the seven steel sleeves at the lower part of the steel sleeve of the large-diameter slurry shield portal, the steel sleeve to be lifted is hoisted by a crane on the main lifting ear 5 of the lifting frame 1. The steel sleeve 3 to be lifted is hoisted on the steel sleeve lifting ear 2, and the counterweight of the crawler crane is suspended on the counterweight lifting ear 4. Above the lifting frame 1, a 10T electric hoist is used and hung on the auxiliary lifting ear 6 that adjusts the balance of the balance beam. The weight of the steel sleeve 3 to be lifted is about 4.5T, and the weight of the suspended counterweight 7 is 5T. Therefore, the middle main lifting ear 5 is appropriately close to the side of the counterweight 7. When installing the steel sleeve, first adjust the balance of the lifting frame 1 on the wellhead, and then install it in the middle plate ring beam. After the steel sleeve is installed in blocks, there is no weight on one side of the steel sleeve. Use the 10T electric hoist to contract the chain to be stressed to prevent the entire lifting frame 1 from falling towards the counterweight side. Finally, install the top steel sleeve. Since there is only a 5 cm gap between the top of the top steel sleeve and the middle plate ring beam during installation, it is impossible to use the hook to lift it normally. Use the auxiliary tooling to support the top steel sleeve on the lifting frame 1, and it is not restricted by the upper distance, so that the top steel sleeve can be inserted into the portal 8.

[0022] In the specific construction of the present invention, it effectively solves the problem that the steel sleeve is too long in the middle plate ring beam and cannot be hoisted directly above, greatly speeds up the installation operation time, and at the same time avoids the safety operation risks caused by using methods such as chain hoists.

[0023] The above is only one embodiment of the present invention, and its description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A large-diameter slurry shield portal steel sleeve auxiliary lifting frame, characterized in that: The lifting frame (1) is a straight-shaped steel structure support frame. At the bottom of one end of the lifting frame (1), there are two steel sleeve lifting lugs (2). The distance between the two steel sleeve lifting lugs (2) matches the distance between the two lifting points (300) on the steel sleeve (3) to be lifted. At the bottom of the other end of the lifting frame (1), there are two counterweight lifting lugs (4); in the middle area at the top of the lifting frame (1), there are two main lifting lugs (5). The two main lifting lugs (5) are symmetrically arranged with respect to the center line of the lifting frame (1). Near the counterweight lifting lug (4) at the top of the lifting frame (1), there is an auxiliary lifting lug (6).

2. The auxiliary lifting frame for the large-diameter slurry shield portal steel sleeve according to claim 1, wherein: The length of the lifting frame (1) is 6 - 8 m and it is made of H-shaped steel with a width of 30 - 40 cm. Between the two H-beams of the H-shaped steel, stiffening plates (100) with a thickness of 2 - 3 cm are welded at intervals of 40 - 60 cm.

3. The auxiliary lifting frame for the large-diameter slurry shield portal steel sleeve according to claim 1 or 2, characterized in that: One of the steel sleeve lifting lugs (2) is located at the end of one end of the lifting frame (1), and the auxiliary lifting lug (6) and one of the counterweight lifting lugs (4) are located at the end of the other end of the lifting frame (1).

4. A large-diameter slurry shield portal steel sleeve auxiliary lifting frame according to claim 1 or 2, characterized in that: The distance between the two steel sleeve lifting lugs (2) is 1.4 - 1.6 m, and the distance between the two counterweight lifting lugs (4) is 0.8 - 1.2 m.

5. A large-diameter slurry shield portal steel sleeve auxiliary lifting frame according to claim 1 or 2, characterized in that: The arrangement directions of the steel sleeve lifting lugs (2) and the counterweight lifting lugs (4) are the same. The arrangement directions of the main lifting lugs (5) and the auxiliary lifting lugs (6) are the same, and the setting directions of the main lifting lugs (5) are perpendicular to those of the steel sleeve lifting lugs (2) and the counterweight lifting lugs (4).

6. The auxiliary lifting frame for the large-diameter slurry shield portal steel sleeve according to claim 1 or 2, characterized in that: The steel sleeve lifting lugs (2) and the counterweight lifting lugs (4) are made of steel plates with a thickness of 2 - 3 cm; the main lifting lugs (5) and the auxiliary lifting lugs (6) are made of steel plates with a thickness of 3 - 4 cm.

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