A shield machine steel sleeve receiving anti-drop device and construction method thereof

Abstract

The present invention relates to the field of shield construction, and in particular to a shield machine steel sleeve receiving anti-head-drop device and a construction method thereof, comprising a steel cap, an oil pressure chamber, a top, a slideway earth-breaking cone, and a rectangular trough slideway, wherein the curvature of the upper surface of the steel cap is the same as the curvature of the outer surface of the shield machine; a top hole for inserting the bottom end of the top is provided in the middle of the upper surface of the oil pressure chamber, and the top end of the top is fixedly connected to the lower surface of the steel cap; one end of the slideway earth-breaking cone is connected to the bottom of the oil pressure chamber; the slideway earth-breaking cone is arranged in the rectangular trough slideway, and the rectangular trough slideway is fixed to the inner side wall of the steel sleeve; an oil inlet hole connected to the lower side wall of the top hole is provided on the outer wall of the oil pressure chamber. The present invention is a stable cap that can be excavated together with the shield machine head, which effectively solves the hidden danger of the shield machine head-dropping, and through the oil pressure adjustment at the four corners, the shield machine can always maintain a good excavation posture during the excavation process.

Description

Technical Field

[0001] The invention relates to the field of shield construction, and in particular to a shield machine steel sleeve receiving anti-drop head device and a construction method thereof. Background Art

[0002] In urban subway shield construction, steel sleeves are widely used to receive the completed shield excavation. However, due to the high fluidity of the muddy water in the steel sleeve, the shield machine head tends to tilt downward after driving out of the tunnel, resulting in severe scraping between the cutter head and the inner wall of the steel sleeve, which can cause serious engineering accidents. In addition, due to the high fluidity of the muddy water in the steel sleeve and the low friction with the outer shell of the shield machine, the machine body will rotate during the shield excavation process, posing a serious safety hazard.

[0003] The present invention ingeniously sets up a shield machine steel sleeve receiving anti-head diving device and a construction method thereof, which can be a stable foundation for excavation together with the shield machine head, effectively solving the hidden danger of shield machine head diving, and through the oil pressure adjustment at the four corners, the shield machine can always maintain a good excavation posture during the excavation process, and the huge fitting force between the steel foundation and the shield machine shell effectively prevents the shield machine body from rotating. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a shield machine steel sleeve receiving anti-head diving device and a construction method thereof, which can be used as a stable foundation for excavation together with the shield machine head, effectively solving the hidden danger of the shield machine head diving, and through the oil pressure adjustment at the four corners, the shield machine can always maintain a good excavation posture during the excavation process, and the huge fitting force between the steel foundation and the shield machine shell can effectively prevent the shield machine body from rotating.

[0005] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0006] The present invention discloses a shield machine steel sleeve receiving anti-drop head device, comprising a steel cap, an oil pressure chamber, a top, a slideway breaking cone, and a rectangular trough slideway, wherein the steel cap is in an arc-shaped structure, and the curvature of its upper surface is the same as the curvature of the outer surface of the shield machine; the oil pressure chamber is in a triangular prism-shaped structure, and a top hole for inserting the bottom end of the top is provided in the middle of its upper surface, and the top end of the top is fixedly connected to the lower surface of the steel cap; the slideway breaking cone is in a conical structure, and one end of the slideway breaking cone is connected to the bottom of the oil pressure chamber to form a structure with an "L" shape in longitudinal section; the slideway breaking cone is arranged in the rectangular trough slideway, and the rectangular trough slideway is fixed to the inner side wall of the steel sleeve; the outer wall of the oil pressure chamber is provided with an oil inlet hole connected to the lower side wall of the top hole.

[0007] The bottom of the steel cap is provided with four tops connected thereto, the axes of the tops are perpendicular to the bottom surface of the slideway breaking cone and all pass through the center of the arc where the steel cap is located.

[0008] A sealing ring is provided on the oil pressure tank, and the sealing ring is tightly fitted in the contact between the upper surface of the oil pressure tank and the top, the bottom surface of the sealing ring is tightly fitted in the top surface of the oil pressure tank, and the inner ring part is tightly fitted in the side wall of the top.

[0009] The minimum thickness of the wall of the oil pressure tank is greater than half of the radius of the top.

[0010] The slideway soil breaking cone and the prismatic oil pressure tank are integrally formed.

[0011] The wall thickness of the steel plates on both sides of the rectangular trough slideway is not less than 1 / 5 of the height of the steel plates on both sides.

[0012] The inner diameter of the oil inlet hole is not greater than 2 / 3 of the outer diameter of the top.

[0013] The outer diameter of the top is not less than 2 cm.

[0014] A construction method for a shield machine steel sleeve receiving an anti-drop head device comprises the following steps:

[0015] Step 1: symmetrically weld two rectangular groove slideways at a position with an angle of 30° to the vertical center line of the steel sleeve;

[0016] Step 2: connecting the external hydraulic equipment to the oil inlet at the bottom of the hydraulic tank;

[0017] Step 3: stably place the whole structure consisting of the slideway earth-breaking cone, the prismatic oil pressure tank, the top, the steel cap, and the sealing ring on the side of the rectangular trough slideway near the shield machine exit;

[0018] Step 4: Control the oil pressure of the external oil pressure equipment to ensure that the vertical distance from the center of the top surface of the four ejectors to the inner wall of the steel sleeve is no more than 5 cm;

[0019] Step 5, adjusting the oil pressure of the external equipment so that the axis of the ejector passes through the center of the arc where the steel cap is located;

[0020] Step 6: Use traditional construction technology to install the steel sleeve and pour mud to ensure mud and water pressure;

[0021] Step 7: When the head of the shield machine enters the steel sleeve and just passes over the top of the steel cap, the device is evenly pressurized to make the steel cap rise steadily. When the upper surface of the steel cap fits tightly with the outer shell of the shield machine, the oil pressure remains stable;

[0022] Step eight, dynamically observe the tunneling posture of the shield machine, and adjust the adverse tunneling posture that may occur in the shield machine in time by adjusting the pressure of the four oil pressure tanks.

[0023] The beneficial effects of the present invention are:

[0024] 1) The invention provides a stable foundation that can be excavated together with the shield machine head, effectively solving the hidden danger of the shield machine head falling, and by adjusting the oil pressure at the four corners, the shield machine can always maintain a good excavation posture during the excavation process;

[0025] 2) The present invention effectively prevents the self-rotation of the shield machine body through the huge fitting force between the steel cap and the shield machine shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the device of the present invention;

[0027] Figure 2 It is a schematic diagram of the arrangement of the top under the steel cap;

[0028] Figure 3 It is a schematic diagram of the cross section of the steel sleeve when the device is working;

[0029] Figure 4 This is the elevation view of the steel sleeve when the device is working.

[0030] In the figure: 1 steel cap, 2 oil pressure chamber, 3 ejector, 4 slideway breaking cone, 5 rectangular groove slideway, 6 sealing ring, 7 oil inlet hole, 8 ejector hole, 9 steel sleeve. DETAILED DESCRIPTION

[0031] The present invention is further described below:

[0032] See also Figure 1-4 ,

[0033] The present invention discloses a shield machine steel sleeve receiving anti-drop head device, comprising a steel cap 1, an oil pressure chamber 2, a top 3, a slideway earth-breaking cone 4, and a rectangular trough slide 5. The steel cap 1 is an arc-shaped structure, and the curvature of its upper surface is the same as the curvature of the outer surface of the shield machine; the oil pressure chamber 2 is a triangular prism-shaped structure, and a top hole 8 for inserting the bottom end of the top 3 is provided in the middle of its upper surface, and the top end of the top 3 is fixedly connected to the lower surface of the steel cap 1; the slideway earth-breaking cone 4 is a conical structure, and one end of it is connected to the bottom of the oil pressure chamber 2 to form a longitudinal section. It has an "L"-shaped structure; the slide breaking cone 4 is arranged in the rectangular trough slide 5, and the rectangular trough slide 5 is fixed to the inner wall of the steel sleeve 9; the outer wall of the oil pressure tank 2 is provided with an oil inlet hole 7 which is connected with the lower side wall of the top hole 8, and a stable foundation which can be excavated together with the shield machine head effectively solves the hidden danger of the shield machine head falling, and through the adjustment of the oil pressure at the four corners, the shield machine can always maintain a good excavation posture during the excavation process, and the huge fitting force between the steel foundation and the shield machine casing effectively prevents the shield machine body from rotating.

[0034] The bottom of the steel cap 1 is provided with four tops 3 connected thereto, the axes of the tops 3 are perpendicular to the bottom surface of the slideway breaking cone 4, and all pass through the center of the arc where the steel cap 1 is located, so as to improve the fit between the steel cap 1 and the shield machine casing.

[0035] A sealing ring 6 is provided on the oil pressure tank 2, and the sealing ring 6 is tightly fitted in the contact between the upper surface of the oil pressure tank 2 and the top 3. The bottom surface of the sealing ring 6 is tightly fitted in the top surface of the oil pressure tank 2, and the inner ring part is tightly fitted in the side wall of the top 3, which has good sealing performance.

[0036] The minimum thickness of the wall of the hydraulic tank 2 is greater than half of the radius of the top 3, which can ensure that the hydraulic tank body has a certain safety factor.

[0037] The slideway breaking cone 4 is integrally formed with the prismatic oil pressure tank 2 .

[0038] The thickness of the steel plates on both sides of the rectangular trough slide 5 is not less than 1 / 5 of the height of the steel plates on both sides. For safety reasons, it is mainly based on the fact that columns with a diameter to height ratio of less than 1 / 5 are very stable.

[0039] The inner diameter of the oil inlet hole 7 is not greater than 2 / 3 of the outer diameter of the top 3, ensuring that the oil inlet hole is smaller than the inner chamber diameter. On the other hand, the stability of the structure is also considered. This is a vertical compression member and the opening should not be too large.

[0040] The outer diameter of the top 3 is not less than 2 cm, because the maximum height of the final rise is generally 10 cm, and the component is a vertical pressure-bearing component. In order to avoid the instability of the pressure rod, a ratio of 1 / 5 is used as the limit, so that the top is short and thick.

[0041] A construction method for a shield machine steel sleeve receiving an anti-drop head device comprises the following steps:

[0042] Step 1: symmetrically weld two rectangular groove slideways 5 at a position with an angle of 30° with the vertical center line of the steel sleeve 9;

[0043] Step 2: connecting the external oil pressure equipment to the oil inlet 7 at the bottom of the oil pressure tank 2;

[0044] Step 3: stably place the whole structure consisting of the slideway earth-breaking cone 4, the prismatic oil pressure tank 2, the top 3, the steel cap 1, and the sealing ring 6 on the side of the rectangular trough slideway 5 close to the shield machine exit;

[0045] Step 4: Control the oil pressure of the external oil pressure equipment to ensure that the vertical distance from the center of the top surface of the four ejectors 3 to the inner wall of the steel sleeve 9 is no more than 5 cm;

[0046] Step 5, adjusting the oil pressure of the external equipment so that the axis of the ejector 3 passes through the center of the arc where the steel cap 1 is located;

[0047] Step 6: Use traditional construction technology to install the steel sleeve and pour mud to ensure mud and water pressure;

[0048] Step 7: When the head of the shield machine enters the steel sleeve and just passes over the top of the steel cap 1, the device is evenly pressurized to make the steel cap 1 rise steadily. When the upper surface of the steel cap 1 is tightly fitted with the shield machine shell, the stable oil pressure remains unchanged;

[0049] Step eight, dynamically observe the tunneling posture of the shield machine, and adjust the pressure of the four oil pressure tanks 2 to timely adjust the adverse tunneling posture that may be produced by the shield machine.

[0050] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings or directly or indirectly applied in related technical fields are also included in the patent protection scope of the present invention.

Claims

1. A shield machine steel sleeve receiving anti-drop head device, characterized in that: It includes a steel cap (1), an oil pressure tank (2), a top (3), a slideway earth-breaking cone (4), and a rectangular trough slideway (5). The steel cap (1) is an arc-shaped structure, and the curvature of its upper surface is the same as the curvature of the outer surface of the shield machine; The oil pressure tank (2) is in the shape of a triangular prism, and a top hole (8) is provided in the middle of its upper surface for inserting the bottom end of the top (3), and the top end of the top (3) is fixedly connected to the lower surface of the steel cap (1); The slideway earth-breaking cone (4) is of a conical structure, one end of which is connected to the bottom of the oil pressure chamber (2), forming a structure with an "L"-shaped longitudinal section; the slideway earth-breaking cone (4) is arranged in the rectangular groove slideway (5), and the rectangular groove slideway (5) is fixed to the inner side wall of the steel sleeve (9); The outer wall of the oil pressure tank (2) is provided with an oil inlet hole (7) which is connected to the lower side wall of the ejector hole (8); the bottom of the steel cap (1) is provided with four ejectors (3) connected thereto, the axes of the ejectors (3) being perpendicular to the bottom surface of the slideway breaking cone (4) and passing through the center of the arc where the steel cap (1) is located; the oil pressure tank (2) is provided with a sealing ring (6), the sealing ring (6) is tightly fitted in the contact between the upper surface of the oil pressure tank (2) and the ejector (3), the bottom surface of the sealing ring (6) is tightly fitted in the top surface of the oil pressure tank (2), and the inner ring part is tightly fitted in the side wall of the ejector (3).

2. A shield machine steel sleeve receiving anti-drop device according to claim 1, characterized in that: The thickness of the hydraulic tank (2) at its minimum wall thickness is greater than half the radius of the top (3).

3. A shield machine steel sleeve receiving anti-drop device according to claim 1, characterized in that: The slideway soil breaking cone (4) and the prismatic oil pressure tank (2) are integrally formed.

4. The shield machine steel sleeve receiving anti-drop device according to claim 1, characterized in that: The wall thickness of the steel plates on both sides of the rectangular groove slideway (5) is not less than 1 / 5 of the height of the steel plates on both sides.

5. The shield machine steel sleeve receiving anti-drop device according to claim 1, characterized in that: The inner diameter of the oil inlet hole (7) is no greater than 2 / 3 of the outer diameter of the top (3).

6. The shield machine steel sleeve receiving anti-drop device according to claim 1, characterized in that: The outer diameter of the top (3) is not less than 2 cm.

7. A construction method for a shield machine steel sleeve receiving anti-drop head device as claimed in any one of claims 1 to 6, characterized in that: The steps include: Step 1: symmetrically weld two rectangular groove slideways (5) at a position with an angle of 30° with the vertical center line of the steel sleeve (9); Step 2: connecting the external oil pressure equipment to the oil inlet hole (7) at the bottom of the oil pressure tank (2); Step 3, stably placing the overall structure consisting of the slideway earth-breaking cone (4), the prismatic oil pressure chamber (2), the top (3), the steel cap (1), and the sealing ring (6) on the side of the rectangular trough slideway (5) close to the exit position of the shield machine; Step 4, controlling the oil pressure of the external oil pressure equipment to ensure that the vertical distance from the center of the top surface of the four ejectors (3) to the inner wall of the steel sleeve (9) is no more than 5 cm; Step 5, adjusting the oil pressure of the external equipment so that the axis of the ejector (3) passes through the center of the arc where the steel cap (1) is located; Step 6: Use traditional construction technology to install the steel sleeve and pour mud to ensure mud and water pressure; Step 7: When the head of the shield machine enters the steel sleeve and just passes over the top of the steel cap (1), the device is evenly pressurized to make the steel cap (1) rise smoothly. When the upper surface of the steel cap (1) is tightly fitted with the outer shell of the shield machine, the oil pressure remains stable; Step 8, dynamically observe the tunneling posture of the shield machine, and timely adjust the shield machine to any adverse tunneling posture that may occur by adjusting the pressure of the four hydraulic tanks (2).

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