Transformation method for changing three shield tail brushes of tail shield of shield tunneling machine into four shield tail brushes

Abstract

The invention discloses a transformation method for transforming three shield tail brushes into four shield tail brushes of a tail shield of a shield tunneling machine. The transformation method comprises the following steps that an old tail shield of the three shield tail brushes is placed on a corresponding leveling tool and leveled; a welding seam between a tail shield barrel A ring and a tail shield barrel B ring of the old tail shield is removed, a welding seam between the tail shield barrel B ring and a grouting and grease injection plate is removed, and three rows of shield tail brushes, a positioning ring A plate and a positioning ring B plate on the inner side of the tail shield barrel B ring are removed; and a hinged ring, a tail shield barrel A ring, a sealing ring plate, a grouting connecting block and a grouting grease injection plate of the old tail shield are reserved, and a groove in the structure connecting position is repaired and polished. The sealing capacity of the tail shield is improved, and the tunneling construction requirement of the shield tunneling machine in a stratum with high burial depth and rich underground water is met.

Description

Technical Field

[0001] The invention belongs to the technical field of shield machines, and in particular relates to a method for transforming a shield machine tail shield from three tail brushes to four tail brushes. Background Art

[0002] With the rapid development of urban construction, the number of underground tunnel projects is increasing, and the strata used by shield machines are becoming more and more complex. At present, the shield tail seal of existing shield machines is mostly a three-layer wire shield tail brush seal.

[0003] However, according to previous construction experience, the three-layer shield tail brush sealing tail shield has poor sealing effect and is prone to leakage when used in deep burial and groundwater-rich strata; as the tunnel develops deeper underground, the existing three-layer shield tail brush tail shield cannot meet the requirements of tunnel construction. Therefore, it is urgent to transform and upgrade the existing shield machine three-layer shield tail brush tail shield structure. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a method for transforming a shield machine's tail shield with three tail brushes into four tail brushes, thereby increasing the sealing capacity of the tail shield and meeting the requirements of the shield machine for excavation construction in strata with high burial depth and abundant groundwater.

[0005] To achieve the above object, the present invention adopts the following technical solution: a method for transforming a shield machine tail shield from three tail brushes to four tail brushes, comprising the following steps:

[0006] Step 1: Place the old tail shield of the three-shield tail brush on the corresponding leveling tool and level the old tail shield;

[0007] Step 2: Plane off the weld between the tail shield cylinder body A ring and the tail shield cylinder body B ring of the old tail shield, plane off the weld between the tail shield cylinder body B ring and the grouting and grease injection plate, and plane off the three rows of shield tail brushes, the positioning ring A plate and the positioning ring B plate on the inner side of the tail shield cylinder body B ring;

[0008] Step 3: retain the hinge ring, A ring of the tail shield cylinder, sealing ring plate, grouting connection block, grouting grease injection plate of the old tail shield, and repair and polish the groove at the structural connection;

[0009] Step 4: Re-manufacture the extended tail shield cylinder C ring, grouting extension plate, positioning ring A plate, positioning ring B plate, positioning ring C plate, and four shield tail brushes. The positioning ring A plate, positioning ring B plate, positioning ring C plate, and four shield tail brushes are installed on the inner side of the extended tail shield cylinder C ring;

[0010] Step 5, assemble the structure made in step 4 into a cylindrical shape by riveting and welding, and then add a fixed structure inside the positioned cylinder to make it a newly made extended tail shield structure;

[0011] Step 6: hoist the newly made and lengthened tail shield structure in step 5 onto the old tail shield in step 3 as a whole, and perform leveling, connection and fixing;

[0012] Step 7: Plane a groove parallel to the grouting and grease injection plate on the tail shield cylinder of the old tail shield, and embed a steel pipe in it;

[0013] Step 8, butt-join the embedded steel pipe described in step 7 with the grease pipe of the third grease cavity on the C ring of the tail shield cylinder of the newly made extended tail shield structure and fully weld them;

[0014] Step 9: weld the grouting extension plate of the newly made extended tail shield structure to the grouting and grease injection plate of the old tail shield. The front end of the grouting extension plate is provided with a butt groove and a weld plug welding hole. After the plug welding is completed, adjacent pipelines are prevented from being connected.

[0015] Step 10: After all grease pipes and grouting plates are welded, perform a pressure test to ensure there is no leakage.

[0016] In the above technical solution, the tooling in step 1 includes a supporting pier and a jack, and the old tail shield is made horizontal by adjusting the jack.

[0017] In the above technical solution, the newly manufactured extended tail shield structure in step 4 includes three grease chambers.

[0018] In the above technical solution, the fixed structure in step 5 is a cross-shaped support.

[0019] In the above technical solution, in step 6, the new extended tail shield structure is connected and fixed to the old tail shield by riveting and welding.

[0020] In the above technical solution, a grease groove is processed on the inner side of the new cylinder body formed by welding the extended tail shield cylinder body C ring and the tail shield cylinder body A ring in step 9, and the grease groove is parallel to the grouting and grease injection plate, the grouting extension plate, and the grouting and grease injection hole.

[0021] In the above technical scheme, after the welding of the grease pipe and the grouting and grease injection plate is completed in step 10, the positioning ring A plate, positioning ring B plate, positioning ring C plate, four shield tail brushes on the inner side of the tail shield cylinder C ring are lengthened, and the sealing ring on the inner side of the tail shield cylinder A ring forms a four-cavity three-cavity shield tail brush sealing structure.

[0022] The beneficial effects of the present invention are as follows: the three-row tail brush tail shield of the existing old shield machine is transformed into a four-row tail brush tail shield, thereby increasing the sealing capacity of the tail shield and meeting the construction requirements of the shield machine for excavation in strata with high burial depth and abundant groundwater; the tail shield structure is transformed by this transformation method, thereby shortening the shield body transformation cycle, saving the shield machine's adaptability transformation cost, and improving the turnover efficiency of the existing shield machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic diagram of the tail shield structure after modification of the present invention.

[0024] Figure 2 It is a schematic diagram of the newly made lengthened tail shield structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the newly added pipeline structure for the tail shield modification of the present invention.

[0026] Figure 4 The figure is a schematic diagram of the tail shield structure of the four-shield tail brush after modification according to the present invention.

[0027] Figure 5 It is a structural schematic diagram of the newly made grouting extension plate of the present invention.

[0028] Figure 6 This is a schematic diagram of the structure of the old tail shield.

[0029] Among them: 1. hinged ring; 2. grouting connection block; 3. grouting and grease injection plate; 4. tail shield cylinder A ring; 5. tail shield cylinder B ring; 6. sealing ring plate; 7. positioning ring A plate; 8. positioning ring B plate; 9. shield tail brush; 10. extended tail shield cylinder C ring; 11. grouting extension plate; 12. positioning ring C plate; 13. leveling tooling; 14 M-shaped support, 15. steel pipe, 16. grease groove, 17. weld plug welding hole, 18. grouting hole. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 5 The method for transforming a shield machine tail shield from three tail brushes to four tail brushes includes the following steps:

[0032] Step 1, place the old tail shield of the three-shield tail brush on the corresponding leveling tool 13 and level the old tail shield;

[0033] Step 2, planing the weld between the tail shield cylinder A ring 4 and the tail shield cylinder B ring 5 of the old tail shield, planing the weld between the tail shield cylinder B ring 5 and the grouting and grease injection plate 3, and planing the three rows of shield tail brushes 9, the positioning ring A plate 7 and the positioning ring B plate 8 on the inner side of the tail shield cylinder B ring 5;

[0034] Step 3: retain the hinge ring 1, the tail shield cylinder A ring 4, the sealing ring plate 6, the grouting connection block 2, the grouting grease injection plate 3 of the old tail shield, and repair and polish the groove at the structural connection;

[0035] Step 4, re-make the extended tail shield cylinder C ring 10, the grouting extension plate 11, the positioning ring A plate 7, the positioning ring B plate 8, the positioning ring C plate 12, and the four shield tail brushes 9, and install the positioning ring A plate 7, the positioning ring B plate 8, the positioning ring C plate 12 and the four shield tail brushes 9 on the inner side of the extended tail shield cylinder C ring 10;

[0036] Step 5, assemble the structure made in step 4 into a cylindrical shape by riveting and welding, and then add a fixed structure inside the positioned cylinder to make it a newly made extended tail shield structure;

[0037] Step 6: hoist the newly made and lengthened tail shield structure in step 5 onto the old tail shield in step 3 as a whole, and perform leveling, connection and fixing;

[0038] Step 7, planing a groove parallel to the grouting and grease injection plate 3 on the tail shield cylinder of the old tail shield, and pre-embed the steel pipe 15 therein;

[0039] Step 8, butting the embedded steel pipe in step 7 with the grease pipe of the third grease cavity on the C ring 10 of the tail shield cylinder of the newly made extended tail shield structure and fully welding them;

[0040] Step 9, welding the grouting extension plate 11 of the newly made extended tail shield structure to the grouting and grease injection plate 3 of the old tail shield, the front end of the grouting extension plate 11 is provided with a butt groove and a weld plug welding hole 17, and after the plug welding is completed, adjacent pipelines are prevented from being connected;

[0041] Step 10: After all grease pipes and grouting plates are welded, perform a pressure test to ensure there is no leakage.

[0042] In the above technical solution, the tooling in step 1 includes a supporting pier and a jack, and the old tail shield is made horizontal by adjusting the jack.

[0043] In the above technical solution, the newly manufactured extended tail shield structure in step 4 includes three grease chambers.

[0044] In the above technical solution, the fixed structure in step 5 is a cross-shaped support.

[0045] In the above technical solution, in step 6, the new extended tail shield structure is connected and fixed to the old tail shield by riveting and welding. Riveting and welding is a method of riveting first and then welding.

[0046] In the above technical solution, the inner side of the new cylinder formed by welding the extended tail shield cylinder C ring 10 and the tail shield cylinder A ring 4 in step 9 is processed with a grease groove 16, and the grease groove is parallel to the grouting and grease injection plate 2, the grouting extension plate 11, and the grouting and grease injection hole. Figure 5 As shown, the grouting extension plate 11 is provided with two grouting ports 18. The grouting ports corresponding to the connection between the grouting extension plate 11 and the grouting and grease injection plate 3 should be connected, and the two adjacent grouting ports are plug-welded to prevent the two grouting pipes from being connected in series.

[0047] like Figure 4As shown, after the welding of the grease pipe and the grouting and grease injection plate 3 in step 10 is completed, the positioning ring A plate 7, the positioning ring B plate 8, the positioning ring C plate 12, and the four shield tail brushes 9 on the inner side of the tail shield cylinder C ring 10 are extended, and the sealing ring 6 on the inner side of the tail shield cylinder A ring 4 constitute a four-cavity three-cavity shield tail brush sealing structure.

[0048] like Figure 6 As shown, the old tail shield structure includes three shield tail brushes 9.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for transforming a shield machine tail shield from three tail brushes to four tail brushes, characterized in that: The following steps are involved: Step 1: Place the old tail shield of the three-shield tail brush on the corresponding leveling tool and level the old tail shield; Step 2: Plane off the weld between the tail shield cylinder body A ring and the tail shield cylinder body B ring of the old tail shield, plane off the weld between the tail shield cylinder body B ring and the grouting and grease injection plate, and plane off the three rows of shield tail brushes, the positioning ring A plate and the positioning ring B plate on the inner side of the tail shield cylinder body B ring; Step 3: retain the hinge ring, A ring of the tail shield cylinder, sealing ring plate, grouting connection block, grouting grease injection plate of the old tail shield, and repair and polish the groove at the structural connection; Step 4: Re-manufacture the extended tail shield cylinder C ring, grouting extension plate, positioning ring A plate, positioning ring B plate, positioning ring C plate, and four shield tail brushes. The positioning ring A plate, positioning ring B plate, positioning ring C plate, and four shield tail brushes are installed on the inner side of the extended tail shield cylinder C ring; Step 5, assemble the structure made in step 4 into a cylindrical shape by riveting and welding, and then add a fixed structure inside the positioned cylinder to make it a newly made extended tail shield structure; Step 6: hoist the newly made and lengthened tail shield structure in step 5 onto the old tail shield in step 3 as a whole, and perform leveling, connection and fixing; Step 7: Plane a groove parallel to the grouting and grease injection plate on the tail shield cylinder of the old tail shield, and embed a steel pipe in it; Step 8, butt-join the embedded steel pipe described in step 7 with the grease pipe of the third grease cavity on the C ring of the tail shield cylinder of the newly made extended tail shield structure and fully weld them; Step 9: weld the grouting extension plate of the newly made extended tail shield structure to the grouting and grease injection plate of the old tail shield. The front end of the grouting extension plate is provided with a butt groove and a weld plug welding hole. After the plug welding is completed, adjacent pipelines are prevented from being connected. Step 10: After all grease pipes and grouting plates are welded, perform a pressure test to ensure there is no leakage.

2. The method for transforming a three-way shield tail brush into a four-way shield tail brush according to claim 1, characterized in that: The tooling in step 1 includes supporting piers and jacks. The old tail shield is made level by adjusting the jacks.

3. The method for transforming a three-way shield tail brush into a four-way shield tail brush according to claim 1, characterized in that: The newly made extended tail shield structure in step 4 includes three grease chambers.

4. The method for transforming a three-way shield tail brush into a four-way shield tail brush according to claim 1, characterized in that: The fixed structure in step 5 is a cross-shaped support.

5. The method for transforming a three-stage shield tail brush into a four-stage shield tail brush according to claim 1, characterized in that: In step 6, the new extended tail shield structure is connected and fixed to the old tail shield by riveting and welding.

6. The method for transforming a three-way shield tail brush into a four-way shield tail brush according to claim 1, characterized in that: The new cylinder body formed by welding the extended tail shield cylinder body C ring and the tail shield cylinder body A ring in step 9 is processed with a grease groove on the inner side, and the grease groove is parallel to the grouting and grease injection plate, the grouting extension plate, and the grouting and grease injection hole.

7. The method for transforming a three-stage shield tail brush into a four-stage shield tail brush according to claim 1, characterized in that: After the welding of the grease pipe and the grouting and grease injection plate is completed in step 10, the positioning ring A plate, positioning ring B plate, positioning ring C plate, four shield tail brushes on the inner side of the tail shield cylinder C ring are lengthened, and the sealing ring on the inner side of the tail shield cylinder A ring forms a four-cavity three-cavity shield tail brush sealing structure.

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