Method for hoisting shield tunneling machine super-long component on side edge of foundation pit in single machine mode

Abstract

The invention discloses a method for hoisting an ultra-long component of a shield tunneling machine on the side edge of a foundation pit in a single machine mode, and relates to the field of shield tunneling machine hoisting construction methods. The method comprises the following steps that firstly, a main hook and an auxiliary hook of a crawler crane are adopted for hoisting on the ground, the ultra-long component is adjusted to a preset inclination angle through long and short steel wire ropes and an electric chain hoist, and then the auxiliary hook is removed; and finally, the electric chain hoist is recycled to adjust the angle of the super-long component and place the super-long component to a preset position, and hoisting is completed. The problem that a single machine on the side edge of the foundation pit hoists the super-long component is solved, operation is easy and convenient, hoisting construction risks are reduced, and the construction cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of shield machine hoisting construction methods, and in particular to a method for hoisting an extra-long component of a shield machine by a single machine on a foundation pit side. Background Art

[0002] Before shield construction, the shield machine shield, bridge and various supporting trolleys need to be hoisted from the ground to the starting shaft by crawler crane for connection and debugging and other starting preparations. When hoisting the shield, the crawler crane usually stands at the end of the starting shaft, and hoists the various parts of the shield machine into the shaft through the reserved hoisting port of the starting shaft. If there is an extra-long component whose length exceeds the reserved hoisting port size, the main and auxiliary hooks of the crawler crane are used to flip and tilt the component in the air, and hoist it into the shaft after meeting the hoisting well mouth size. During the on-site construction process, there is a problem that the starting shaft is affected by the surrounding environment and there is not enough space at the end for the crawler crane to stand. At this time, the crawler crane can only stand on the side of the foundation pit for hoisting. When a single machine hoists an extra-long component, it is impossible to use the main and auxiliary hooks to tilt it down along the length direction of the hoisting port; if a double machine is used for lifting, the lifting, rotating boom, and lowering operations involved in the lifting process are difficult to implement and have high safety risks.

[0003] Therefore, technical personnel in this field urgently need to provide a method for single-machine hoisting of extra-long components of a shield machine on the side of a foundation pit, which can tilt, hoist and lower extra-long components of different lengths into the reserved hoisting opening of the starting shaft. Summary of the invention

[0004] The purpose of the present invention is to provide a method for hoisting an extra-long component of a shield machine by a single machine on the side of a foundation pit, so as to solve the problem that the main and auxiliary hooks cannot be used to tilt and hoist the extra-long component along the length direction of the hoisting opening when hoisting the extra-long component by a single machine.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The invention discloses a method for hoisting an extra-long component of a shield machine by a single machine at the side of a foundation pit, comprising a hoisting device. The hoisting device adopts multi-point hoisting of the extra-long component so that the extra-long component is inclined and hoisted from the top of the foundation pit to the bottom of the foundation pit.

[0007] Preferably, the hoisting device comprises a main hook, an auxiliary hook, a long steel wire rope, a short steel wire rope and an electric chain hoist, and the hoisting device is used to hoist an extra-long member, and the surface of the extra-long member is provided with a first hoisting point, a second hoisting point, a third hoisting point and a fourth hoisting point, wherein the first hoisting point and the third hoisting point, and the second hoisting point and the fourth hoisting point are respectively located on the same axial line on the surface of the extra-long member, and the first hoisting point and the second hoisting point, and the third hoisting point and the fourth hoisting point are respectively located on the same circumferential line on the surface of the extra-long member;

[0008] The main hook is connected to the lifting point one and the lifting point two of the super-long component by short steel wire rope, and the main hook is connected to the lifting point three and the lifting point four of the super-long component by long steel wire rope. The middle part of the long steel wire rope is connected to the chain electric hoist, and the auxiliary hook is connected to the lifting point three and the lifting point four by short steel wire rope.

[0009] A method for hoisting an extra-long component of a shield machine by a single machine on the side of a foundation pit comprises the following steps:

[0010] Step 1: Carry out preparation work before lifting, select crawler cranes of corresponding tonnage and lifting slings of corresponding specifications, prepare lifting machinery and materials, organize personnel to enter the site and conduct pre-construction condition acceptance;

[0011] Step 2: Install slings for the main and auxiliary hooks. Before lifting, calculate the size of the long wire rope and the short wire rope according to the size of the extra-long component and the size of the hoisting wellhead, determine the length of the main hook and auxiliary hook, and install them together;

[0012] Step 3: The component is lifted and rotated in the air. At the same time, the main hook and auxiliary hook of the crawler crane are lifted to lift the super-long component horizontally off the ground. The auxiliary hook remains stationary, and the main hook is slowly lifted to adjust the inclination angle of the super-long component. The force of the short wire rope of the main hook and the short wire rope of the auxiliary hook is converted into the force of the long wire rope of the main hook. After the force state conversion is completed, the auxiliary hook is removed from the lifting points of the third and fourth lifting points, and the main hook is used to complete the lifting of the super-long component;

[0013] Step 4: The main hook hoists the component down the well, adjusts the extra-long component to the predetermined inclination angle, rotates the boom of the crawler crane to the top of the hoisting well mouth, and lowers the extra-long component to the shield hoisting well;

[0014] Step 5: Rotate and adjust the over-long component, hoist it into place, and when the over-long component is lowered to a certain distance from the ground, move the over-long component into the structural space of the starting layer, then retract the electric chain hoist, adjust the angle of the over-long component, slowly drop the hook, and complete the hoisting of the over-long component.

[0015] Preferably, in the step 2, when the main hook and the auxiliary hook of the crawler crane are lifted to lift the super-long component horizontally off the ground, the short wire ropes of the main hook at the lifting point 1 and the lifting point 2 are in a tensioned state, the long wire rope of the main hook and the electric chain hoist are in a relaxed state, and the short wire ropes of the auxiliary hooks at the lifting point 3 and the lifting point 4 are in a tensioned state;

[0016] When the main hook is slowly lifted to adjust the tilt angle of the component, the long steel wire rope and the electric chain hoist of the main hook are in a tensioned state until they are fully tensioned. After the force state conversion is completed, the lifting point at the auxiliary hook is removed.

[0017] Preferably, in the step five, a mobile tooling is pre-fixed at the bottom of the starting layer, the tail of the extra-long component is first dropped onto the pre-placed and fixed mobile tooling, and then the hook is slowly dropped so that the head of the extra-long component also falls onto the pre-placed and fixed mobile tooling, and finally the main hook and the wire rope are removed to complete the lifting of the extra-long component, and the extra-long component is moved to the predetermined position of the starting layer by the mobile tooling.

[0018] Preferably, the bottom of the movable tool is provided with an iron shoe and braked by the iron shoe.

[0019] Compared with the prior art, the beneficial technical effects of the present invention are:

[0020] The present invention discloses a method for hoisting an extra-long component of a shield machine by a single machine at a side of a foundation pit. The method comprises the following steps: firstly, a crawler crane main hook and an auxiliary hook are used to hoist the component on the ground, and the extra-long component is adjusted to a predetermined inclination angle by means of long and short steel wire ropes and an electric chain hoist. Then, the auxiliary hook is released, and the main hook is used to rotate and hoist the extra-long component into the well. Finally, the electric chain hoist is retracted to adjust the angle of the extra-long component and drop it to a predetermined position to complete the hoisting. The method solves the problem of hoisting an extra-long component by a single machine at the side of a foundation pit, is easy to operate, reduces the risk of hoisting construction, and reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic flow chart of a method for hoisting an extra-long component of a shield machine by a single machine at the side of a foundation pit according to the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the super-long member of the present invention;

[0024] Figure 3 This is a schematic diagram of the inclined lifting of an extra-long member of the present invention;

[0025] Figure 4 This is a schematic diagram of the super-long component of the present invention being hoisted parallel to the ground;

[0026] Figure 5 This is a schematic diagram of the hoisting of an ultra-long component into a well according to the present invention;

[0027] Figure 6 This is a schematic diagram of the angle adjustment of the super-long component of the present invention;

[0028] Figure 7 It is a schematic diagram of hanging and placing the super-long component of the present invention.

[0029] Explanation of the accompanying reference numerals: 1. Extra-long member; 2. Main hook; 3. Auxiliary hook; 4. Long wire rope; 5. Short wire rope; 6. Electric chain hoist; 7. Wellhead; 8. Mobile tooling; 9. Iron shoe. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] like Figure 1-7 As shown, a method for hoisting an extra-long component of a shield machine by a single machine on the side of a foundation pit includes a hoisting device, which adopts a multi-point hoisting method for the extra-long component 1, so that the extra-long component 1 is tilted and hoisted from the top of the foundation pit to the bottom of the foundation pit.

[0032] The hoisting device comprises a main hook 2, an auxiliary hook 3, a long steel wire rope 4, a short steel wire rope 5 and an electric chain hoist 6, and the hoisting device is used to hoist an extra-long member 1, and the surface of the extra-long member 1 is provided with a hoisting point 1, a hoisting point 2, a hoisting point 3 and a hoisting point 4, wherein the hoisting point 1 and the hoisting point 3, the hoisting point 2 and the hoisting point 4 are respectively located on the same axial line of the surface of the extra-long member 1, and the hoisting point 1 and the hoisting point 2, the hoisting point 3 and the hoisting point 4 are respectively located on the same circumferential line of the surface of the extra-long member 1;

[0033] The main hook 2 is connected to the lifting point 1 and the lifting point 2 of the super-long component 1 by a short steel wire rope 5, and the main hook 2 is connected to the lifting point 3 and the lifting point 4 of the super-long component 1 by a long steel wire rope 4. The middle part of the long steel wire rope 4 is connected to a chain electric hoist 6, and the auxiliary hook 3 is connected to the lifting point 3 and the lifting point 4 by a short steel wire rope 5.

[0034] The use process of the present invention is as follows:

[0035] Step 1: Carry out preparation work before lifting, select crawler cranes of corresponding tonnage and lifting slings of corresponding specifications, prepare lifting machinery and materials, organize personnel to enter the site and conduct pre-construction condition acceptance;

[0036] Step 2: Install the slings for the main and auxiliary hooks. Before lifting, calculate the sizes of the long steel wire rope 4 and the short steel wire rope 5 according to the size of the extra-long component 1 and the size of the lifting wellhead 7, determine the length of the main hook 2 and the auxiliary hook 3, and install them together;

[0037] Step 3: The component is lifted and rotated in the air. At the same time, the crawler crane main hook 2 and auxiliary hook 3 are lifted to lift the super-long component 1 horizontally off the ground. The auxiliary hook 3 remains stationary. The main hook 2 is slowly lifted to adjust the inclination angle of the super-long component 1. The force of the short steel wire rope 5 of the main hook 2 and the short steel wire rope 5 of the auxiliary hook 3 is converted into the force of the long steel wire rope 4 of the main hook 2. After the force state conversion is completed, the auxiliary hook 3 is removed from the lifting points 3 and 4, and the main hook 2 is used to complete the lifting of the super-long component 1.

[0038] Step 4: The main hook hoists the component down the well, adjusts the extra-long component 1 to a predetermined tilt angle, rotates the boom of the crawler crane to the top of the hoisting well opening 7, and lowers the extra-long component 1 into the shield hoisting well;

[0039] Step 5: Rotate and adjust the extra-long component, and hoist it into place. When the extra-long component 1 is lowered to a certain distance from the ground, move the extra-long component 1 into the structural space of the starting layer, then retract the electric chain hoist 6, adjust the angle of the extra-long component 1, and slowly drop the hook to complete the hoisting of the extra-long component 1.

[0040] Specifically, when the extra-long member 1 is lowered to a height of 1 m from the ground, the electric chain hoist 6 is retracted.

[0041] Specifically, in the step 2, when the main hook 2 and the auxiliary hook 3 of the crawler crane are lifted to lift the super-long component 1 horizontally off the ground, the short steel wire ropes of the main hook 2 at the lifting point 1 and the lifting point 2 are in a tensioned state, the long steel wire rope 4 of the main hook 2 and the electric chain hoist 6 are in a relaxed state, and the short steel wire ropes 5 of the auxiliary hook 3 at the lifting point 3 and the lifting point 4 are in a tensioned state;

[0042] When the main hook 2 is slowly lifted to adjust the tilt angle of the component, the long steel wire rope 4 and the electric chain hoist 6 of the main hook 2 are in a tensioned state until they are fully tensioned, and the auxiliary hook 3 lifting points are removed after the force state conversion is completed.

[0043] Specifically, in the step five, a mobile tooling 8 is pre-fixed at the bottom of the starting layer, and the tail of the super-long component 1 is first dropped onto the pre-placed and fixed mobile tooling 8, and then the hook is slowly dropped so that the head of the super-long component 1 also falls on the pre-placed and fixed mobile tooling 8, and finally the main hook 2 and the wire rope are removed to complete the lifting of the super-long component 1, and the super-long component 1 is moved to the predetermined position of the starting layer through the mobile tooling 8.

[0044] The bottom of the movable tool 8 is provided with an iron shoe 9 and braked by the iron shoe 9 .

[0045] Specifically, the iron shoe brake is a process in which the strong friction generated after the wheel presses on the iron shoe gives resistance to the vehicle, causing the vehicle to quickly lose its original speed and achieve the purpose of braking after a certain sliding distance.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for hoisting an extra-long component of a shield machine by a single machine at the side of a foundation pit, characterized in that: It comprises a hoisting device, wherein the hoisting device adopts a multi-point hoisting method to hoist the super-long component (1), so that the super-long component (1) is tilted and hoisted from the top of the foundation pit to the bottom of the foundation pit.

2. The method for hoisting an extra-long shield machine component at the side of a foundation pit by a single machine according to claim 1, characterized in that: The lifting device comprises a main hook (2), an auxiliary hook (3), a long steel wire rope (4), a short steel wire rope (5) and an electric chain hoist (6), and the lifting device is used to lift an extra-long component (1). The surface of the extra-long component (1) is provided with a first lifting point, a second lifting point, a third lifting point and a fourth lifting point, wherein the first lifting point and the third lifting point, and the second lifting point and the fourth lifting point are respectively located on the same axial line on the surface of the extra-long component (1), and the first lifting point and the second lifting point, and the third lifting point and the fourth lifting point are respectively located on the same circumferential line on the surface of the extra-long component (1); The main hook (2) is connected to the first and second lifting points of the super-long member (1) by using a short steel wire rope (5), the main hook (2) is connected to the third and fourth lifting points of the super-long member (1) by using a long steel wire rope (4), the middle of the long steel wire rope (4) is connected to a chain electric hoist (6), and the auxiliary hook (3) is connected to the third and fourth lifting points by using a short steel wire rope (5).

3. The method for hoisting an extra-long shield machine component at the side of a foundation pit by a single machine according to claim 2, characterized in that: The following steps are included: Step 1: Carry out preparatory work before lifting, select crawler cranes of corresponding tonnage and lifting slings of corresponding specifications, prepare lifting machinery and materials, organize personnel to enter the site and conduct pre-construction condition acceptance; Step 2: Install the slings for the main hook and the auxiliary hook. Before lifting, calculate the size of the long steel wire rope (4) and the short steel wire rope (5) according to the size of the extra-long component (1) and the size of the lifting wellhead (7), determine the length of the main hook (2) and the auxiliary hook (3), and install them together; Step 3: The component is lifted and rotated in the air, and the main hook (2) and the auxiliary hook (3) of the crawler crane are lifted at the same time to lift the super-long component (1) horizontally off the ground, the auxiliary hook (3) remains stationary, and the main hook (2) is slowly lifted to adjust the inclination angle of the super-long component (1), and the force of the short steel wire rope (5) of the main hook (2) and the short steel wire rope (5) of the auxiliary hook (3) is converted into the force of the long steel wire rope (4) of the main hook (2). After the force state conversion is completed, the auxiliary hook (3) is removed from the lifting points at the third and fourth lifting points, and the main hook (2) is subsequently used to complete the lifting of the super-long component (1); Step 4: The main hook hoists the component down the well, adjusts the extra-long component (1) to a predetermined tilt angle, rotates the boom of the crawler crane to the top of the hoisting well opening (7), and lowers the extra-long component (1) into the shield hoisting well; Step 5: The super-long component is rotated and adjusted, and hoisted into place. When the super-long component (1) is lowered to a certain distance from the ground, the super-long component (1) is moved into the structural space of the starting layer, and then the chain electric hoist (6) is retracted to adjust the angle of the super-long component (1), and the hook is slowly dropped to complete the hoisting of the super-long component (1).

4. The method for hoisting an extra-long shield machine component at the side of a foundation pit by a single machine according to claim 3, characterized in that: In the step 2, when the main hook (2) and the auxiliary hook (3) of the crawler crane are lifted to lift the extra-long component (1) horizontally off the ground, the short steel wire ropes of the main hook (2) at the first and second lifting points are in a tensioned state, the long steel wire rope (4) of the main hook (2) and the electric chain hoist (6) are in a relaxed state, and the short steel wire ropes (5) of the auxiliary hook (3) at the third and fourth lifting points are in a tensioned state; When the main hook (2) is slowly lifted to adjust the tilt angle of the component, the long steel wire rope (4) and the electric chain hoist (6) of the main hook (2) are in a tensioned state until they are fully tensioned. After the force state conversion is completed, the auxiliary hook (3) is removed from the lifting point.

5. The method for hoisting an extra-long shield machine component at the side of a foundation pit by a single machine according to claim 3, characterized in that: In the step 5, a mobile tooling (8) is pre-fixed at the bottom of the starting layer, and the tail of the super-long component (1) is first dropped onto the pre-placed and fixed mobile tooling (8), and then the hook is slowly dropped so that the head of the super-long component (1) also falls onto the pre-placed and fixed mobile tooling (8), and finally the main hook (2) and the wire rope are removed to complete the lifting of the super-long component (1), and the super-long component (1) is moved to a predetermined position of the starting layer by the mobile tooling (8).

6. The method for hoisting an extra-long shield machine component at the side of a foundation pit by a single machine according to claim 5, characterized in that: The bottom of the movable tool (8) is provided with an iron shoe (9) and brakes are applied by means of the iron shoe (9).

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