Construction technology of oblique receiving of shield steel sleeve

Abstract

The application relates to a construction process for receiving a shield steel sleeve at an oblique intersection, and relates to the technical field of shield receiving. The construction process is as follows: S1, checking and counting the top plate and the enclosure structure of the original shield well; S11, removing part of the enclosure structure of the original shield well in advance, and installing a hole ring steel plate; S2, measuring the size of the hole and remaking a steel sleeve according to the size of the hole; S3, installing a transition ring at the hole; S4, installing the steel sleeve on one side of the transition ring and fixing the steel sleeve in the shield well; S5, finally placing a counterforce frame between the steel sleeve and the side wall of the shield well; S51, when the counterforce frame is placed, one end of the counterforce frame abuts against the steel sleeve, and the other end abuts against the side wall of the shield well; S6, placing a first abutting piece between the counterforce frame and the side wall of the shield well. The application has the effects of facilitating the construction of a new receiving well at an existing receiving well and improving construction safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield receiving, in particular to a shield steel sleeve oblique receiving construction process. BACKGROUND

[0002] Due to the acceleration of urbanization process, the demand for urban metro is in short supply, and the demand for underground engineering, especially rail transit, is increasing year by year. Compared with the traditional construction method, the shield construction is widely used in rail transit construction due to its high safety, fast construction speed and low cost.

[0003] In the traditional shield construction, the construction must have the starting and receiving conditions, and the shield machine receiving adopts the construction method of ground land excavation shaft and shield whole lifting. At the same time, in the construction of urban metro network, there is an engineering problem of mutual crossing of interval tunnels. The shield construction of metro tunnel needs to build a new shield receiving well. However, at the intersection of metro lines, there may be a situation that the new metro receiving well overlaps with the existing line receiving well. Under the premise of normal operation of the existing line, it is the main problem of this type of engineering to successfully complete the construction and ensure the safety of operation and construction.

[0004] According to the related technology in the above, the inventor believes that if the existing receiving well design position is changed and a new receiving well is built near the existing receiving well, it will cause a large safety hazard and bring great design and construction difficulty. SUMMARY

[0005] In order to facilitate the construction of a new receiving well at the existing receiving well and improve the construction safety, the present application provides a shield steel sleeve oblique receiving construction process.

[0006] The shield steel sleeve oblique receiving construction process provided by the present application adopts the following technical scheme:

[0007] A shield steel sleeve oblique receiving construction process, the construction process is as follows:

[0008] S1, count the top plate and enclosure structure of the original shield well;

[0009] S11, remove part of the enclosure structure of the original shield well in advance, and install the hole door ring steel plate;

[0010] S2, measure the size of the hole and re-produce the steel sleeve according to the size of the hole;

[0011] S3, install the transition ring at the hole;

[0012] S4, install the steel sleeve on one side of the transition ring, and fix the steel sleeve in the shield well;

[0013] S5, finally place the counterforce frame between the steel sleeve and the side wall of the shield well;

[0014] S51, when placing the counterforce frame, one end of the counterforce frame abuts against the steel sleeve, and the other end abuts against the side wall of the shield well;

[0015] S6, placing a first abutting piece between the counterforce frame and the side wall of the shield well.

[0016] By adopting the above technical scheme, when a new shield receiving end is installed, the installation is performed at the original shield well, the steel sleeve and the portal ring steel plate support the portal, and the transition ring can further reinforce the portal, and the shield machine can enter the steel sleeve, the maintenance structure of the original shield well is removed, and the shield receiving structure is newly arranged at the portal, thereby facilitating the construction of a new receiving well at the existing receiving well and improving the construction safety.

[0017] Optionally, the transition ring comprises a first steel ring and a second steel ring, the first steel ring is sleeved on the second steel ring, the first steel ring is threadedly connected with the second steel ring, one end of the first steel ring close to the second steel ring is obliquely arranged along the axis of the first steel ring, the other end of the first steel ring away from the second steel ring is in a closed shape, and a plurality of unfolding openings are arranged on the first steel ring at intervals in the circumferential direction.

[0018] By adopting the above technical scheme, when the transition ring is installed, the other end of the first steel ring away from the second steel ring is directed towards the portal and located in the portal, the second steel ring is rotated, the second steel ring props open the first steel ring, the first steel ring abuts against the inner side wall of the portal, and the stability between the first steel ring and the portal is improved.

[0019] Optionally, one end of the first steel ring close to the second steel ring is coaxially provided with a limiting ring.

[0020] By adopting the above technical scheme, when the second steel ring props open the first steel ring, the limiting ring abuts against the portal, and the second steel ring is facilitated to prop open the first steel ring.

[0021] Optionally, a clamping groove is formed in the inner side of the second steel ring, and the clamping groove is used for placing a lever or other rotating tool for rotating the second steel ring.

[0022] By adopting the above technical scheme, when the second steel ring is rotated, the lever or other rotating tool for rotating the second steel ring is inserted into the clamping groove, and the second steel ring is facilitated to be rotated.

[0023] Optionally, the counterforce frame comprises a mounting frame and a plurality of first abutting pieces, the mounting frame is located between the steel sleeve and the side wall of the shield well away from the first steel ring, one end of the first abutting piece is connected with one end of the mounting frame away from the steel sleeve, and the other end of the first abutting piece abuts against one end of the shield well close to the mounting frame, and the first abutting piece is used for abutting against the mounting frame.

[0024] By adopting the above technical solution, the reaction frame is placed between the steel sleeve and the side wall of the shield tunnel. Multiple first clamping components are activated, which clamp the mounting frame, making the mounting frame and the steel sleeve clamp together. The steel sleeve clamps the limiting ring, so that the reaction frame is mainly subjected to axial force and less bending moment.

[0025] Optionally, an adjusting plate is provided inside the mounting frame. The adjusting plate is equipped with a rotating screw. One end of the rotating screw is rotatably connected to the adjusting plate, and the other end passes through the top of the mounting frame and is threadedly connected to the mounting frame. Multiple second abutting members are provided between the adjusting plate and the shield shaft. One end of the second abutting member abuts against the side wall of the shield shaft near the adjusting plate, and the other end is connected to the adjusting plate.

[0026] By adopting the above technical solution, rotating the screw drives the adjusting plate to rise and fall, adjusting the adjusting plate to be coaxial with the steel sleeve. At the same time, the second clamping member clamps the adjusting plate, further reducing the bending moment of the load-bearing frame.

[0027] Optionally, a mounting rod can be detachably connected to the mounting frame, and the mounting rod is horizontally arranged on the mounting frame.

[0028] By adopting the above technical solution, the mounting rod abuts against the adjusting plate, thereby improving the stability between the adjusting plate and the mounting frame.

[0029] Optionally, the portal ring steel plate is installed inside the opening, and an installation distance is reserved between the portal ring steel plate and the opening, the reserved installation distance being greater than the width of the first steel ring.

[0030] By adopting the above technical solution, the reserved installation distance is greater than the width of the first steel ring, which can reduce the possibility of interference between the first steel ring and the portal ring steel plate.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. By chiseling away part of the original shield shaft retaining structure, installing the portal ring steel plate and transition ring at the opening, installing the steel sleeve, and installing the reaction frame between the steel sleeve and the side wall of the shield shaft, and setting the reaction frame as a structure subjected to axial force, it is easier to build a new receiving shaft at the existing receiving shaft and improve construction safety.

[0033] 2. By setting an adjustment plate inside the reaction frame, the adjustment plate can be adjusted according to steel sleeves of different sizes, so that the adjustment plate and the steel sleeve are coaxially set, which increases the possibility of the reaction frame being subjected to axial force and further improves the stability of the reaction frame. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the shield tunneling steel sleeve receiving device according to an embodiment of this application.

[0035] Figure 2 This is a perspective sectional view of the shield tunneling steel sleeve receiving device according to an embodiment of this application.

[0036] Figure 3 yes Figure 2 Enlarged view of part A.

[0037] Figure 4 This is a partial perspective sectional view of the shield tunneling steel sleeve receiving device according to an embodiment of this application.

[0038] Figure 5 This is a structural schematic diagram of the shield tunneling steel sleeve receiving device according to an embodiment of this application from another perspective.

[0039] Explanation of reference numerals in the attached drawings: 1. Shield shaft; 2. Portal ring steel plate; 3. Steel sleeve; 31. Limiting groove; 4. Transition ring; 41. First steel ring; 411. Unfolding opening; 42. Second steel ring; 421. Slot; 43. Limiting ring; 5. Reaction frame; 51. Mounting frame; 52. First clamping element; 53. Adjusting disc; 54. Rotating screw; 541. Adjusting hole; 55. Second clamping element; 6. Pad; 61. Locking block; 7. Mounting rod; 8. Receiving block; 81. Slot. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0041] This application discloses a shield tunneling steel sleeve oblique receiving construction process.

[0042] Reference Figure 1 and Figure 2 A shield tunneling steel sleeve oblique receiving construction process is described below:

[0043] S1. Take stock and count the top plate and retaining structure of the original shield shaft 1, determine the retaining structure of the original shield shaft 1 that needs to be removed, clean the new shield shaft 1 and add supporting components to reinforce the new shield shaft 1.

[0044] S11. Remove part of the original shield shaft 1 retaining structure in advance and install the portal ring steel plate 2. When installing the portal ring steel plate 2, leave a certain installation distance between the portal ring steel plate 2 and the opening.

[0045] S2. Measure the size of the opening and remake the steel sleeve according to the size of the opening;

[0046] S3. Install transition ring 4 at the opening, with the transition ring 4 installed at the installation distance left at the opening;

[0047] S4. Install the steel sleeve 3 on the side of the transition ring 4 near the opening, and fix the steel sleeve 3 inside the newly built shield shaft 1;

[0048] S5. Finally, place the reaction frame 5 between the steel sleeve 3 and the side wall of the shield shaft 1.

[0049] S51. When placing the reaction frame 5, one end of the reaction frame 5 abuts against the steel sleeve 3, and the other end abuts against the side wall of the shield shaft 1.

[0050] S6. Place a first abutting member 52 between the reaction frame 5 and the side wall of the shield shaft 1. The first abutting member 52 supports the reaction frame 5, so that the reaction frame 5 and the newly built shield shaft 1 form a reaction force, making the reaction frame 5 more reasonably stressed, and achieving the effect of abutting the steel sleeve 3.

[0051] A new shield tunneling shaft 1 will be constructed at the location of the existing shield tunneling shaft 1. The entrance and opening of the new shield tunneling shaft 1 will be reinforced, and a steel plate 2 for the entrance and a transition ring 4 will be installed to reduce the possibility of the entrance collapsing. This will facilitate the construction of a new receiving shaft at the location of the existing receiving shaft and improve construction safety.

[0052] Specifically, refer to Figure 2 and Figure 3 The transition ring 4 includes a first steel ring 41 and a second steel ring 42. The first steel ring 41 is fitted onto the second steel ring 42 and the two are threaded together. The end of the first steel ring 41 closest to the second steel ring 42 is inclined along its axis. The first steel ring 41 is generally conical, and the end of the first steel ring 41 furthest from the second steel ring 42 is constricted. The first steel ring 41 has six equally spaced openings 411 along its circumferential axis. When the second steel ring 42 is rotated, it gradually expands the first steel ring 41, causing the outer circumference of the first steel ring 41 to abut against the inner wall of the opening, thus improving the stability between the first steel ring 41 and the opening. A limiting ring 43 is coaxially provided at the end of the first steel ring 41 closest to the second steel ring 42, and one end face of the limiting ring 43 is welded to the end face of the first steel ring 41 closest to the second steel ring 42.

[0053] At the same time, refer to Figure 2 and Figure 3 The second steel ring 42 has a slot 421 on its inner side. The slot 421 is a regular hexagon and is used to place a lever or other rotating tool for rotating the second steel ring 42. In this embodiment, the rotating tool for rotating the second steel ring 42 is an internal hex wrench that matches the slot 421. The portal ring steel plate 2 is installed inside the opening. The outer periphery of the portal ring steel plate 2 is in contact with the inner wall of the opening, and an installation distance is reserved between the portal ring steel plate 2 and the opening. The reserved installation distance is greater than the width of the first steel ring 41. When the second steel ring 42 opens the first steel ring 41, the portal ring steel plate 2 will not interfere with the first steel ring 41.

[0054] A first steel ring 41, a second steel ring 42, and a limiting ring 43 are installed at the tunnel entrance. On the one hand, this facilitates the installation of the steel sleeve 3, allowing one end of the steel sleeve 3 to abut against the end face of the limiting ring 43 away from the tunnel entrance. On the other hand, the tunnel entrance ring steel plate 2, the first steel ring 41, and the second steel ring 42 can support the shield tunnel shaft 1, reducing the possibility of the shield tunnel shaft 1 collapsing.

[0055] Reference Figure 4 and Figure 5 A pad 6 is provided below the steel sleeve 3. The pad 6 is used to fix the steel sleeve 3 inside the shield shaft 1. A locking block 61 is integrally formed on the pad 6 near the steel sleeve 3. A limiting groove 31 is opened on the steel sleeve 3 near the locking block 61. The locking block 61 is located in the limiting groove 31, which can pre-fix the steel sleeve 3 near the bottom of the shield shaft 1. The reaction frame 5 includes a mounting frame 51 and four first abutting members 52. The mounting frame 51 is located between the steel sleeve 3 and the side wall of the shield shaft 1 away from the first steel ring 41. The first abutting member 52 can be one, two or three. In this embodiment, four are provided. The four first abutting members 52 are arranged circumferentially along the central axis of the mounting frame 51. The output end of the first abutting member 52 abuts against the side wall of the shield shaft 1, and the other end is fixedly connected to the mounting frame 51 by bolts. The first abutting member 52 is used to abut against the mounting frame 51.

[0056] Furthermore, referring to Figure 4 and Figure 5An adjusting plate 53 is provided inside the mounting frame 51. The adjusting plate 53 can be disc-shaped or cube-shaped; in this embodiment, it is disc-shaped. A rotating screw 54 is provided on the adjusting plate 53. One end of the rotating screw 54 is rotatably connected to the adjusting plate 53 via a bearing, and the other end is threaded through the top of the mounting frame 51. An adjusting hole 541 is provided at the top of the rotating screw 54 to facilitate the operator's rotation of the rotating screw 54. Four second abutting members 55 are provided between the adjusting plate 53 and the shield shaft 1. There can be one, two, or three second abutting members 55; in this embodiment, there are four. One end of each second abutting member 55 abuts against the side wall of the shield shaft 1 near the adjusting plate 53, and the other end is also fixedly connected to the adjusting plate 53 via bolts. The second abutting members 55 are used to abut the adjusting plate 53. Both the second abutting member 55 and the first abutting member 52 are jacks. A mounting rod 7 is detachably connected to the mounting frame 51. The mounting rod 7 is horizontally arranged on the mounting frame 51. A receiving block 8 is welded to each of the two vertically arranged side edges of the mounting frame 51. A slot 81 is opened on each receiving block 8. The mounting rod 7 can be inserted into the slot 81 from top to bottom. There can be one, two or three mounting rods 7. In this embodiment, there are two. One mounting rod 7 is on top and the other is on the bottom. The length of the mounting rod 7 located below is less than the length of the mounting rod 7 located above. In other words, the length of the mounting rod 7 located below is less than the distance between the two receiving blocks 8 on which the mounting rod 7 is installed, which makes it easier to place the mounting rod 7 below. After the reaction frame 5 is installed, the first clamping member 52 and the second clamping member 55 are activated. The first clamping member 52 and the second clamping member 55 fix the steel sleeve 3.

[0057] The implementation principle of the shield tunneling steel sleeve oblique receiving construction process in this application embodiment is as follows: a new shield tunneling shaft 1 is set up at the original shield tunneling shaft 1. First, part of the retaining structure of the original shield tunneling shaft 1 is removed. After installing the portal ring steel plate 2 and transition ring 4 at the opening, the steel sleeve 3 is installed. One end of the steel sleeve 3 abuts against the transition ring 4. Finally, a reaction frame 5 is installed between the steel sleeve 3 and the side wall of the shield tunneling shaft 1. The reaction frame 5 is subjected to axial force to press the steel sleeve 3 tightly, which facilitates the construction of a new receiving shaft at the existing receiving shaft and improves construction safety.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A construction process for oblique receiving of a steel sleeve of a shield, characterized in that, The construction process is as follows: S1, check and count the top plate and enclosure structure of the original shield well (1); S11, remove part of the enclosure structure of the original shield well (1) in advance, and install the hole ring steel plate (2); S2, measure the size of the hole and re-make the steel sleeve (3) according to the size of the hole; S3, install the transition ring (4) at the hole; S4, install the steel sleeve (3) on one side of the transition ring (4), and fix the steel sleeve (3) in the shield well (1); S5, finally place the counterforce frame (5) between the steel sleeve (3) and the side wall of the shield well (1); S51, when placing the counterforce frame (5), one end of the counterforce frame (5) abuts against the steel sleeve (3), and the other end abuts against the side wall of the shield well (1); S6, place the first abutting piece (52) between the counterforce frame (5) and the side wall of the shield well (1); The counterforce frame (5) comprises a mounting frame (51) and a plurality of first abutting pieces (52), the mounting frame (51) is located between the steel sleeve (3) and the side wall of the shield well (1) away from the first steel ring (41), one end of the plurality of first abutting pieces (52) is connected with one end of the mounting frame (51) away from the steel sleeve (3), and the other end abuts against one end of the shield well (1) close to the mounting frame (51), and the first abutting piece (52) is used for abutting against the mounting frame (51); The mounting frame (51) is provided with an adjusting disc (53), the adjusting disc (53) is provided with a rotating screw (54), one end of the rotating screw (54) is rotationally connected with the adjusting disc (53), the other end penetrates through the top end of the mounting frame (51) and is threadedly connected with the mounting frame (51), a plurality of second abutting pieces (55) are arranged between the adjusting disc (53) and the shield well (1), one end of the second abutting piece (55) abuts against the side wall of the shield well (1) close to the adjusting disc (53), and the other end is connected with the adjusting disc (53).

2. The construction process of the steel sleeve of the shield according to claim 1, characterized in that: The transition ring (4) comprises a first steel ring (41) and a second steel ring (42), the first steel ring (41) is sleeved on the second steel ring (42), the first steel ring (41) is threadedly connected with the second steel ring (42), one end of the first steel ring (41) close to the second steel ring (42) is obliquely arranged along the axis of the first steel ring (41), one end of the first steel ring (41) away from the second steel ring (42) is in a closing shape, and a plurality of unfolding openings (411) are arranged on the first steel ring (41) at intervals in the circumferential direction.

3. The construction process of the steel sleeve of the shield according to claim 2, characterized in that: The end of the first steel ring (41) close to the second steel ring (42) is coaxially provided with a limiting ring (43).

4. The construction process of the steel sleeve of the shield according to claim 3, characterized in that: The inner side of the second steel ring (42) is provided with a clamping groove (421), and the clamping groove (421) is used for placing a lever or other rotating tool for rotating the second steel ring (42).

5. The construction process of a steel sleeve of a shield for oblique connection according to claim 1, characterized in that: The mounting frame (51) is detachably connected with a mounting rod (7), and the mounting rod (7) is transversely arranged on the mounting frame (51).

6. The construction process of a steel sleeve of a shield for oblique connection according to claim 2, characterized in that: The hole ring steel plate (2) is installed in the hole, and a mounting distance is reserved between the hole ring steel plate (2) and the hole, and the reserved mounting distance is greater than the width of the first steel ring (41).

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