A drilling assembly system and method for a shield junction box

Abstract

The present application relates to a kind of drilling assembly system and method for shield connecting passage, system includes support pivot;Wherein, support pivot includes several support rod, several support rod is connected to form a polygonal support by connecting piece, support rod is designed as hollow pipe, at least three filling cavities attached to the hollow inner wall of support rod are arranged in each support rod, filling cavity extends to connecting piece, and first opening is arranged at connecting piece, filling cavity is configured as: the fluid substance is injected towards first opening, so that filling cavity is filled with fluid substance to increase the supporting force of support rod.The present application designs support rod of the support of the bracket as hollow tubular structure by the support rod of the bracket, and internally equipped with filling cavity, reduces cost consumption under the premise of not reducing the support force of the bracket, solves the problems that existing support is heavy, difficult to remove and the like.Filling cavity can also reduce the gap in support rod, prevent support rod from being excessively pressed and directly broken.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication passage construction, and in particular to a drilling assembly system and method for a shield communication passage. BACKGROUND

[0002] For the construction of an underground communication passage, a better ring support is needed in the construction process to provide steel support and reinforcement for the tunnel, and the firmness of the ring support and the supporting force of the communication passage determine the safety of the underground construction personnel. The ring support used in the prior art has a small resistance to bending moment, pressure and shear force. The excavation and construction of the communication passage will cause harmful loads to the tunnel, so a variety of prestressed supports are often provided to support the tunnel, which increases the construction cost, and the installation of the ring support is after the opening of the freezing hole, and the construction support of the freezing hole needs to be removed during the installation of the ring support, which is complicated.

[0003] In addition, the prior art often uses reinforced concrete to build an underground passage supporting device. Reinforced concrete is a combination of steel bars and concrete, and the combination of the two increases the bearing capacity of the supporting device. However, the combination structure has a high cost, and the supporting device after being composed has a heavy weight, which is not conducive to the rapid installation of underground construction and cannot be recycled, and the manufacturing industry of reinforced concrete is complex, and if there are small gaps during pouring, it will cause risks such as collapse of the passage.

[0004] Chinese patent CN111894636B discloses a shield interval tunnel communication passage segment support structure, which comprises a segment ring assembled by a plurality of segments and a ring-shaped steel support structure connected around the inner side of the segment ring; the inner side of the segment has a middle part with an assembly screw hole, and a corresponding assembly bolt is arranged to threadedly cooperate with the assembly screw hole; the ring-shaped steel support structure comprises a plurality of arch-shaped steel support pieces corresponding to the number of segments, and two adjacent arch-shaped steel support pieces are detachably connected; the middle part of each arch-shaped steel support piece is provided with a through hole corresponding to the assembly bolt, and the arch-shaped steel support piece is detachably connected with the corresponding segment by screwing the assembly bolt through the through hole into the corresponding assembly screw hole; a telescopic mechanism is arranged between each arch-shaped steel support piece and the corresponding segment; the structure is simple, convenient and fast to assemble and disassemble, the construction personnel and materials can easily enter and exit, and the construction period of the shield communication passage is effectively shortened. This patent mainly designs the assembly and disassembly mode of the ring support, thereby shortening the construction period of the communication passage, but the ring support has a small resistance to bending moment, pressure and shear force, and in the process of excavation and construction of the communication passage, if the tunnel produces harmful loads, the ring support may be damaged or even broken.

[0005] Chinese patent CN109630175B discloses a movable prestressed support system and its use method, characterized by including a main frame type steel support, a rear leaning counterforce seat, an inverted arch counterforce seat, a construction side counterforce seat, an arch bottom counterforce seat, a support protection bracket bottom plate, a plate under mobile wheel rail and a wheel rail vertical telescopic device; the main frame type steel support includes 8 main structure columns surrounding a rectangle, the rear leaning counterforce seat includes a transversely telescopic rear leaning counterforce seat bracket and a rear leaning stress buffer block, the inverted arch counterforce seat includes a vertically telescopic inverted arch counterforce seat bracket and an inverted arch stress buffer block, the construction side counterforce seat includes a transversely telescopic construction side counterforce seat bracket and two symmetrically distributed construction side stress buffer blocks, the arch bottom counterforce seat includes a vertically telescopic arch bottom counterforce seat bracket and an arch bottom stress buffer block, and the support protection bracket bottom plate is fixedly arranged at the lower end of the main structure column. The advantages are that the movable, fast support can provide a rear seat force for the contact passage tunneling machine, and the load is longitudinally uniformly distributed. However, the patent has the following disadvantages: the active control method for providing the longitudinal uniform distribution of the load requires an operator to control and calculate it, so that it is used for construction points and forms appropriate support, and the efficiency is low. The movement, use and support of the device require a large amount of time and construction cost. The high-precision device cannot be installed with multiple movable prestressed support systems in the same construction site, which causes a long pause in the construction of the contact passage when the device fails, increases the construction period and cost. The assembly is complex, and the construction conditions need to be considered for adaptive assembly to be applied to contact passages of different sizes and lengths.

[0006] Therefore, a support structure system capable of being assembled in a hole quickly, a drilling device capable of sliding on the support to meet the hole position requirements, and the support capable of reinforcing the pipe in the hole to meet the opening requirements, the support force meeting the requirements of the contact passage and being able to cope with various unexpected situations, replacing the conventional hole door steel ring reinforcement measure, is needed.

[0007] In addition, on the one hand, there are differences in the understanding of those skilled in the art; on the other hand, the inventors have studied a large number of literatures and patents when making the invention, but due to the limited space, all the details and contents are not listed in detail, which does not mean that the invention does not have these characteristics of the prior art, on the contrary, the invention has all the characteristics of the prior art, and the applicant reserves the right to add related prior art in the background art. SUMMARY

[0008] The prior art often uses reinforced concrete to build the underground passage supporting device. Reinforced concrete is a combination structure of steel bars and concrete, and the combination application of the two increases the bearing capacity of the composed supporting device. However, the combined structure has a high cost, and the composed supporting device has a heavy weight, which is not conducive to the rapid installation of underground construction and cannot be recycled. In addition, the manufacturing industry of reinforced concrete is complex, and if there are small gaps in the pouring, it may cause risks such as passage collapse.

[0009] In view of the deficiencies of the prior art, the technical scheme of the present application provides a drilling assembly system for a shield connecting passage, which at least comprises a support shaft; wherein the support shaft comprises a plurality of support rods connected by a connecting piece to form a polygonal support; the support rod is a hollow pipe, and at least three filling cavities are arranged inside the hollow wall of the support rod; the filling cavities extend to the connecting piece and are provided with a first opening at the connection with the connecting piece; and in the case of injecting fluid substances through the first opening, the filling cavities are filled with fluid substances to increase the supporting force of the support rod. The drilling assembly system for the shield connecting passage is provided, the support rod of the composed support is designed as a hollow tubular structure, and the internal filling cavity is arranged, which reduces the cost consumption without reducing the support force of the support, solves the problems of the existing support, such as heavy weight, difficult to remove, and cannot be recycled. The at least three filling cavities can be filled with fluid substances, and the internal space of the support rod is filled through mutual extrusion, so as to transmit the pressure, shear force and bending moment received by the support rod. The design of the filling cavity can reduce the axial tension received by the support rod, satisfy the support force of the support, transmit the pressure through the fluid substance, transmit the bending moment through the filling cavity, reduce the construction weight, and shorten the construction period. The filling cavity can also reduce the gap in the support rod and prevent the support rod from being directly broken due to excessive pressure. Even if one of the filling cavities in the support rod is broken, the remaining filling cavities can still bear the supporting function, and the support rod will not be directly broken or rapidly unbalanced, which provides time for the construction personnel to take reinforcement measures.

[0010] According to a preferred embodiment, the support rod further comprises a wall layer outside the filling cavity. The wall layer is provided with steel strands for reinforcing the inner arc surface of the polygonal support, wherein at least two steel strands are staggered embedded in the wall layer to increase the bending resistance of the support rod.

[0011] According to a preferred embodiment, the steel strands are arranged in a manner mainly distributed on the inner arc surface of the support rod, wherein at least two steel strands are arranged in a manner surrounding the filling cavity along the wall layer; and at least one steel strand is arranged along the inner arc surface of the support rod in a manner penetrating at least two steel strands on the inner arc surface.

[0012] For the inner arc surface of the support rod, the way of setting the steel strand can strengthen the bending resistance of the inner arc surface. Compared with the outer arc surface, the inner arc surface needs more support force to increase the overall strength of the support. The prior art often strengthens the rod by setting the surrounding steel strand, which has the problem of wasting cost. For example, the two steel strands are staggered and embedded in the wall layer, and one steel strand is arranged along the inner arc surface of the support rod in a manner of penetrating at least two steel strands. Such arrangement can make the bearing capacity of the rod not less than that of four surrounding steel strands, thereby reducing the cost consumption, and the use of fewer embedded steel strands can reduce the possible voids in the rod and avoid damage to the support rod.

[0013] According to a preferred embodiment, a rib for reinforcing the inner arc surface of the support rod is arranged in the vertical direction of the extension direction of the support rod, wherein the spacing between several ribs in the extension direction of the support rod is the same or different. The rib is located in the wall layer and does not intersect with the steel strand, and several ribs can provide the bending resistance of the support and withstand the bending moment and shear force of the load from the soil above the connecting channel. The length of the rib is one-third to one-half of the diameter of the support rod.

[0014] According to a preferred embodiment, at least two support rods are combined into the support shaft by a connecting piece to increase the support force. The two ends of the support rod are provided with internal threads for connecting with the connecting piece, and the connecting piece is provided with external threads matched with the internal threads. The threaded connection facilitates the assembly and disassembly of the support rod.

[0015] According to a preferred embodiment, the middle of the connecting piece is a connecting table, and the connecting piece has the same axis as the support rod. The diameter of the connecting table is smaller than the external diameter of the support rod, and the end of the wall layer connected with the connecting piece is provided with at least two compression spring pieces for increasing the axial force, which are arranged along the circumference of the end surface of the wall layer. A part of the compression spring piece is pressed into the wall layer by the connecting table, thereby enhancing the structural strength of the support rod.

[0016] According to a preferred embodiment, the connecting platform is provided with a bridge-shaped support connecting at least two support rods, and the two single arms of the bridge-shaped support are arranged on the connecting platform in axial symmetry and connected to the connecting platform away from the ends of the two support rods, thereby reducing the bending moment and pressure on the support rods. A damping member is further arranged between the bridge-shaped support and the connecting platform, and the damping member comprises a first end surface in contact with the two single arm connection points and a second end surface in contact with the connecting platform, and the first end surface and the second end surface are connected to the single arm connection points and the connecting platform respectively through anchor bolts for damping and bending resistance. The damping member is hollow to provide damping space. The damping member also has bending resistance to meet the needs of the support to resist pressure changes. When the bridge-shaped support is in use, if the soil pressure of the connecting channel changes, the safety of the support can be guaranteed. The bridge-shaped support reduces the overall rigidity of the structure, so that the overall structure of the support has a damping effect, and will not be broken due to excessive rigidity. The bridge-shaped support reduces the impact of pressure on the support, and concentrates the destructive power of pressure on the bridge-shaped support, so that the remaining parts are not affected by pressure changes. Even if deformation occurs, the support can be restored to normal by replacing the deformed bridge-shaped support. After the adjacent support rods use the damping design and reinforcing structure described above, the ideal support effect can be achieved, the bending, shearing and compressive resistance can be improved, the internal stress caused by the pressure change of the connecting channel or the soil settlement can be improved, the temperature stress problem after the support of the connecting platform is excessive can be solved, the structure can be made more perfect without affecting the overall integrity of the structure, and the structural strength can be provided.

[0017] The prior art uses steel pipes to set up a support platform, which is time-consuming and labor-intensive, and needs to fully cover the footboard on the support to meet the installation of mechanical equipment, and the erection period is long. The fixed support point of the support can only be placed at the bolt hole position inside the pipe segment, and the remaining support points are suspended and need to be reinforced, resulting in poor overall problem performance. The fixed support is not movable, and due to the complex arrangement of the frozen hole hole position, the drilling equipment needs to be moved multiple times during construction, increasing the difficulty of on-site construction. After the installation of the frozen hole is completed, the support needs to be removed, and a ring-shaped support needs to be installed before the opening door to ensure the safety and stability of the pipe segment during the opening door process. The process is complicated.

[0018] According to a preferred embodiment, the system further comprises: a plurality of support main shafts; a plane defined by the plurality of support main shafts intersects the axial direction of the connecting channel perpendicularly, and adjacent ends of the support main shafts are connected through the support shaft, thereby constructing a complete support frame. A sliding support rail perpendicular to the plane where the support main shafts are located and connected to the ends of the support main shafts is connected to a sliding platform capable of adjusting the working position of the drilling equipment through a telescopic support rod. A support jack is arranged on the contact surface of the support frame and the inner wall of the connecting channel, thereby constructing a polygonal support frame inscribed in the inside of the shield tunnel.

[0019] The present application also relates to a drilling assembly method for a shield connection passage, comprising the following steps: connecting a plurality of support rods by connectors to form a polygonal support according to the diameter of the connection passage; arranging at least three filling cavities attached to the hollow inner wall of the support rods, the filling cavities being provided with first openings at the connectors; and filling the filling cavities with fluid substances to increase the support force of the support rods when the fluid substances are injected through the first openings.

[0020] According to a preferred embodiment, the support rods further comprise a wall layer outside the filling cavities. The wall layer is provided with steel strands for reinforcing the inner arc surface of the polygonal support, wherein at least two of the steel strands are staggered embedded in the wall layer to increase the bending resistance of the support rods.

[0021] The present application has the following beneficial technical effects:

[0022] (1) The present application provides a drilling assembly system for a shield connection passage, by designing the support rods constituting the support as hollow tubular structures and arranging filling cavities inside, the cost consumption is reduced without reducing the support force of the support, solving the problems of the existing support, such as heavy weight, difficult to dismantle, and non-recyclable. The at least three filling cavities can be filled with fluid substances, and by the mutual extrusion effect, the internal space of the support rods is filled, thereby transmitting the pressure, shear force and bending moment received by the support rods. The design of the filling cavities can reduce the axial tension received by the support rods, satisfy the support force of the support, transmit the pressure by the fluid substances, transmit the bending moment by the filling cavities, reduce the construction weight, and shorten the construction period. The filling cavities can also reduce the gap in the support rods, prevent the support rods from being directly broken due to excessive pressure, and even if one of the filling cavities in the support rods is broken, the remaining filling cavities can still continue to bear the support function, without the support rods being directly broken or rapidly unbalanced, providing time for the construction personnel to take reinforcement measures;

[0023] (2) The combination of multiple support rods makes the support shaft respond to the stress changes of the contact passage in the form of a short rod. The short rod has stronger support force, but the problem is that the rod is easily affected by bending moment. The connecting piece is arranged to isolate the transmission of pressure and bending moment between the support rods. The bridge-shaped support of the connecting piece makes the discontinuous pressure and bending moment be supported even at the connecting piece, meeting the design requirements of the support force of the contact passage. The connecting piece combines the support rods to form a whole support structure, resisting the bending moment and pressure at the connecting part. The free disassembly of each support rod facilitates the transportation of materials. The narrow underground environment makes it difficult to transport long steel pipes into the contact passage, but the free disassembly of the present application solves the problem of transportation difficulty, enabling short rod transportation in the contact passage and then assembling, reducing the construction weight and facilitating operation. During the construction process, various materials for the construction of the contact passage need to be transported, and the transportation equipment is likely to pass through the soil directly above the contact passage, causing a sudden increase in the pressure of the contact passage. The conventional rod is prone to bending, breaking and other phenomena after the sudden change of pressure, resulting in a decrease in the support force of the support on the soil above the contact passage, and even causing the collapse of the contact passage. The support shaft is divided into several support rods in the present application, and the pressure of the soil above the contact passage is dispersed to each node by the multi-node support structure, so that the support shaft is not easily damaged by excessive pressure. The multi-node support structure is stable, effectively improves the structural strength and bending and breaking resistance of the support, and thus improves the safety and reliability of the construction;

[0024] (3) The shock absorber is designed to be hollow to leave a shock absorption space. The shock absorber also has bending resistance, which can meet the needs of the support to resist pressure changes. The bridge-shaped support can ensure the safety of the support when the soil pressure above the contact passage changes. The bridge-shaped support reduces the overall rigidity of the structure, so that the overall structure of the support has a shock absorption effect, and will not be broken due to excessive rigidity. Even if deformation may occur, the support can be restored to normal by replacing the deformed bridge-shaped support. The adjacent support rods use the above shock absorption design and reinforcement structure to achieve ideal support effect, improve the bending, shearing and compressive resistance, improve the internal stress influence caused by the sudden change of contact passage pressure or soil settlement, solve the temperature stress problem after the support of the connecting table is excessive, make the structure more perfect without affecting the overall structure, and have the effect of providing structural strength. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic view of the cross-sectional structure of the preferred embodiment of the support shaft of the present application;

[0026] Figure 2 is a cross-sectional schematic view of a preferred embodiment of the support rod of the present application;

[0027] Figure 3 is a schematic view of the connection of the inner arc steel strand and the rib of a preferred embodiment of the support rod of the present application;

[0028] Figure 4 is a schematic view of the connection of the side steel strand and the rib of a preferred embodiment of the support rod of the present application;

[0029] Figure 5 is a schematic view of the axial surface structure of a preferred embodiment of the drilling assembly system for the shield connecting passage of the present application;

[0030] Figure 6 is a schematic view of the cross-sectional structure of a preferred embodiment of the drilling assembly system for the shield connecting passage of the present application;

[0031] Figure 7 is a schematic view of the cross-sectional structure of another preferred embodiment of the drilling assembly system for the shield connecting passage of the present application.

[0032] List of reference signs

[0033] 1: support main shaft; 2: support branch shaft; 3: sliding support rail; 4: telescopic support rod; 5: sliding platform; 6: support jack; 7: sliding ball; 201: support rod; 202: connecting piece; 203: filling cavity; 204: wall layer; 205: steel strand; 206: rib; 207: connecting table; 208: compression spring piece; 209: bridge-shaped support; 210: damping piece. DETAILED DESCRIPTION

[0034] The present application will be described in detail below with reference to the accompanying drawings.

[0035] Example 1

[0036] The application relates to a drilling assembly system for a shield interconnection passage, comprising at least a plurality of support shafts 1, wherein planes defined by the support shafts 1 are perpendicular to the axial direction of a shield tunnel, and adjacent ends of the support shafts 1 are connected by support shafts 2 to form a complete support frame. The application is directed to the construction of a shield interconnection passage by the freezing method. In the prior art, a multilayer steel pipe support needs to be erected for the construction of the freezing hole of the interconnection passage, and drilling mechanical equipment is installed on the support to meet the drilling requirements. During the construction process, the mechanical equipment needs to be moved multiple times and the angle needs to be adjusted to meet the hole position requirements. The construction efficiency is low, and there is a great safety risk. After the drilling is completed, the entire support needs to be removed to meet the freezing construction requirements. The drilling assembly system for the shield interconnection passage can be quickly assembled in the hole, the drilling equipment can slide on the support to meet the hole position requirements, and the support can reinforce the segments in the hole to meet the opening requirements, replacing the conventional hole door steel ring reinforcement measures. The support shafts can be added or removed based on the required support force of the interconnection passage, so that the support device is flexible and can be used for different types of stratum structures, thereby shortening the construction period and reducing unnecessary cost consumption.

[0037] According to a preferred embodiment, a sliding support rail 3 perpendicular to the plane where the support shaft 1 is located and connected to the end of the support shaft 1 is connected to a sliding platform 5 capable of adjusting the working position of the drilling equipment through a telescopic support rod 4. Since the opening position error of the freezing hole is not greater than 100 mm, in the prior art, the drilling work of the drilling device needs to avoid the segment joint, bolt, main reinforcement and steel segment rib plate, and the deflection is not allowed to exceed 150 mm. The sliding platform meets the movement requirement of the drilling device and avoids the error influence of the segment joint, bolt, main reinforcement and steel segment rib plate on the opening position, so that the drilling operation of the drilling device is more accurate, the freezing hole error is reduced, and the freezing wall thickness does not need to be increased to eliminate the error, thereby ensuring the safety and economy of the construction.

[0038] According to a preferred embodiment, the support shaft 2 is used to connect the adjacent ends of the shaft rods of the support shaft 1, so as to form a support frame together with the support shaft 1; wherein at least four support shafts 2 are connected in a head-to-tail manner to form a rectangular support frame inscribed in the inner wall of the shield tunnel, and a support jack 6 is arranged on the tunnel wall between the two adjacent inscribed ends of the rectangular support frame, and the support jack 6 is connected to the two adjacent inscribed ends of the rectangular support frame through the support shaft 2, so as to form a polygonal support frame inscribed in the inside of the shield tunnel.

[0039] According to a preferred embodiment, the sliding support rail 3 is used to connect a plurality of spaced support shafts 1; the telescopic support rod 4 is arranged on the sliding support rail 3 and is used to adjust the height of the sliding platform 5; the sliding platform 5 is supported on the support shafts 1 by the telescopic support rod 4 and can define the working position of the drilling equipment.

[0040] Embodiment 2

[0041] The present embodiment can be a further improvement and / or supplement to the foregoing embodiments, and repeated contents will not be described herein. The overall and / or part of the preferred embodiments of other embodiments can be supplemented as the present embodiment without causing conflicts or contradictions.

[0042] According to a preferred embodiment, the support shaft comprises a plurality of support rod members 201 connected by a connecting member 202 to form a polygonal support frame. Figure 1 A schematic diagram showing two support rod members 201 connected by a connecting member 202 is shown. The support rod member 201 is a hollow tube, and at least three filling cavities 203 are arranged inside the hollow inner wall of the support rod member 201. The filling cavities 203 extend to the connecting member 202 and are provided with a first opening at the connecting member 202. The connecting member 202 is also provided with a second opening connected to the hollow interior of the support rod member 201. In the case of injecting fluid substances into the first opening, the filling cavities 203 are filled with fluid substances to increase the support force of the support rod member 201. The above-mentioned fluid substances can be water and / or oil. The fluid substances are blocked in the filling cavities 203 by the valve of the first opening, and no leakage phenomenon occurs. The second opening is connected to the hollow interior of the support rod member 201 and is isolated from the filling cavities 203. By injecting substances such as cement into the second opening, the gaps between the filling cavities 203 are filled to increase the rigidity of the support rod member 201. After the second opening is blocked by cement, the connecting member 202 is tightly connected with the support rod member 201 and no relative movement occurs. If disassembly is required, the cement can be dissolved by adding a cement dissolving agent, so as to disassemble the support rod member 201 and the connecting member 202. Figure 2The distribution of the filling cavities 203 inside the hollow support rod 201 is shown. In the case of three filling cavities 203, the filling cavities 203 are equally distributed, and the central part of the three equal parts is left with space connected to the second opening for filling cement to further reinforce the support rod 2. The filling cavities 203 can be composed of high-performance flexible materials, such as fibers. The prior art often uses reinforced concrete to build underground passage support devices. Reinforced concrete is a combination of steel bars and concrete, and the combined application of the two increases the load-bearing capacity of the resulting support device. However, this combination structure has a high cost, and the resulting support device is heavy, which is not conducive to the rapid installation of underground construction and cannot be recycled. In addition, the production industry of reinforced concrete is complex, and if there are small gaps in the pouring, it may cause the passage to collapse and other risks. The present application provides a drilling assembly system for a shield connecting passage, by designing the support rod of the support frame as a hollow tubular structure and internally installing a filling cavity 203, the cost is reduced without reducing the support force of the support frame, solving the problems of the existing support frame, such as heavy weight, difficult to remove, and not recyclable. The at least three filling cavities 203 can be filled with fluid substances, and after being filled, they can fill the internal space of the support rod 201 by mutual extrusion, thereby transmitting the pressure, shear force and bending moment received by the support rod 201. The design of the filling cavity 203 can reduce the axial tension received by the support rod 201, meet the support force of the support frame, and transmit the pressure through the fluid substance, the bending moment through the filling cavity 203, reduce the construction weight, and shorten the construction period. The filling cavity 203 can also reduce the gap in the support rod 201 and prevent the support rod 201 from being directly broken due to excessive pressure. Even if one of the filling cavities 203 in the support rod 201 breaks, the remaining filling cavities 203 can still continue to bear the support function, and the support rod 201 will not be directly broken or rapidly unbalanced, providing time for the construction personnel to take reinforcement measures. Preferably, the first opening is on the support rod 201 and is provided with a valve. The second opening is located between the at least three filling cavities 203, i.e. on the central axis of the support rod 201 and the central axis of the connecting piece 202, so as to be connected to the valve through the opening channel on the central axis of the connecting piece 2.

[0043] According to a preferred embodiment, the support rod 201 further comprises a wall layer 204 outside the filling cavity 203. The wall layer 204 is provided with steel strands 205 for reinforcing the inner arc surface of the polygonal support. At least two steel strands 205 are staggered embedded in the wall layer 204 to increase the bending resistance of the support rod. The shorter support rod 201 has better bending resistance than the longer rod. Preferably, the steel strands 205 are arranged in a manner mainly distributed on the inner arc surface of the support rod 201. At least two steel strands 205 are arranged in a manner surrounding the filling cavity 203 along the wall layer 204. At least one steel strand 205 is arranged along the inner arc surface of the support rod 201 in a manner penetrating at least two steel strands 205 on the inner arc surface. For the inner arc surface of the support rod 201, the arrangement of the steel strands 205 can strengthen the bending resistance of the inner arc surface. Compared with the outer arc surface, the inner arc surface needs more support force to increase the overall strength of the support. The prior art often reinforces the rod by arranging surrounding steel strands 205, which has the problem of wasting cost. For example, the two steel strands 205 of the present application are staggered embedded in the wall layer 204, and one steel strand 205 is arranged along the inner arc surface of the support rod 201 in a manner penetrating at least two steel strands 205 on the inner arc surface. Such arrangement can make the bearing capacity of the rod not less than that of four surrounding steel strands 205, thereby reducing the cost consumption, and the use of fewer embedded steel strands 205 can reduce the possible voids in the rod and avoid damage to the support rod 201.

[0044] According to a preferred embodiment, a rib 206 is arranged in a direction perpendicular to the extension direction of the support rod 201 for reinforcing the inner arc surface of the support rod 201. The spacing between the ribs 206 along the extension direction of the support rod 201 is the same or different. The rib 206 is located in the wall layer 204 and does not intersect the steel strand 205. The ribs 206 can provide the bending resistance of the support and can withstand the bending moment and shear force of the load from the soil above the connecting channel. The length of the rib 206 is one-third to one-half of the diameter of the support rod 201. Figure 3 and Figure 4 The specific distribution positions of the steel strands 205 and the ribs 206 are shown respectively. Among them Figure 3 is a sectional view as viewed from the inner arc surface of the support rod 201, Figure 4 is a corresponding side view.

[0045] According to a preferred embodiment, the at least three filling cavities 203 are arranged with gaps at both ends of the support rod 201, so that the ends of the support rod 201 are arranged with internal threads for connecting with the connecting piece 202. The connecting piece 202 is arranged with external threads matching the internal threads. The threaded connection facilitates the assembly and disassembly of the support rod 201. The number of threads depends on the distance the connecting piece 202 needs to be screwed in and the position after being screwed in. For example, after being screwed in, the connecting piece 202 should be arranged such that the bridge-shaped support 209 is located on the inner arc surface of the support rod 201, and such that the bridge-shaped support 209 can be detachably connected to the support rod 201 and the connecting piece 202.

[0046] According to a preferred embodiment, at least two support rods 201 are combined into a support shaft to increase the support force. The combination of multiple support rods 201 allows the support shaft to respond to changes in stress in the crossheading in the form of a short rod. The short rod has a stronger support force, but the problem is that the rod is easily affected by bending moment. To solve this problem, the connecting piece 202 is arranged. The connecting piece 202 isolates the transmission of pressure and bending moment between the support rods 201, and the bridge-shaped support 209 arranged on the connecting piece 202 allows the discontinuous pressure and bending moment to be supported even at the connecting piece 202, meeting the design requirements of the support force of the crossheading. The connecting piece 202 combines the individual support rods 201 into a whole support structure, resisting the bending moment and pressure at the connection. The free disassembly of the individual support rods 201 facilitates the transportation of materials. The narrow underground environment makes it difficult to transport long steel pipes into the crossheading, but the free disassembly of the present application solves the problem of transportation difficulty, allowing short rod transportation in the crossheading and then assembly, reducing the construction weight and facilitating operation. During construction, due to the need to transport various materials for crossheading construction, the transportation equipment is likely to pass through the soil directly above the crossheading, causing a sudden increase in pressure in the crossheading. Conventional rods are prone to bending, breaking, and other phenomena after a sudden change in pressure, resulting in a decrease in the support force of the support on the soil above the crossheading, and in severe cases, even causing the collapse of the crossheading. The present application divides the support shaft into several support rods 201, and disperses the pressure of the soil above the crossheading to each node through a multi-node support structure, so that the support shaft is not easily damaged by excessive pressure. The multi-node support structure is stable, effectively improving the structural strength and bending and breaking resistance of the support, thereby improving the safety and reliability of the construction.

[0047] According to a preferred embodiment, the middle of the connecting member 202 is a connecting platform 207. The connecting member 202 has the same axis as the supporting rod member 201. The diameter of the connecting platform 207 is smaller than the outer diameter of the supporting rod member 201. The connecting platform 207 can press the compression spring member 208 provided on the wall layer 204 into the wall layer 204. Preferably, the end of the wall layer 204 connected with the connecting member 202 is provided with at least two compression spring members 208 for increasing the axial force. The compression spring members 208 are equally divided along the circumference of the end surface of the wall layer 204. A part of the compression spring member 208 is pressed into the wall layer 204 by the connecting platform 207, thereby enhancing the structural strength of the supporting rod member 201. Preferably, one quarter of the length of the compression spring member 208 is located outside the wall layer 204. The one quarter of the length of the compression spring member 208 located outside the wall layer 204 is pressed into the wall layer 204 by the connecting platform 207.

[0048] According to a preferred embodiment, the connecting platform 207 is provided with a bridge-shaped support 209 connecting the at least two support rods 201. The bridge-shaped support 209 is arranged in the shape of a "X" between the connecting platform 207 and the two support rods 201. The bridge-shaped support 209 includes two single arms respectively connected to the two support rods 201. The two single arms are arranged on the connecting platform 207 in axial symmetry and connected to the connecting platform 207 at the ends away from the two support rods 201. The two single arms form the shape of a "X" to reduce the bending moment and pressure on the support rods 201. Preferably, a damping member 210 is further provided between the bridge-shaped support 209 and the connecting platform 207. The damping member 210 includes a first end surface in contact with the two single arm connection points and a second end surface in contact with the connecting platform 207. The first end surface and the second end surface are respectively connected to the single arm connection points and the connecting platform 207 by anchor bolts. The damping member 210 is hollow designed to leave a damping space. The damping member 210 also has bending resistance to meet the needs of the support to resist pressure changes. When the bridge-shaped support 209 is in use, if the soil pressure on the connecting passage changes, the safety of the support can be guaranteed. The bridge-shaped support 209 reduces the overall rigidity of the structure, so that the overall structure of the support has a damping effect, and will not be broken due to excessive rigidity. The bridge-shaped support 209 reduces the impact of pressure on the support, and concentrates the destructive power of pressure on the bridge-shaped support 209, so as to protect the remaining parts from the impact of pressure changes. Even if deformation may occur, the support can be restored to normal by replacing the deformed bridge-shaped support 209. After the adjacent support rods 201 use the above-mentioned damping design and reinforcing structure, the ideal support effect can be achieved, the bending, shearing and compressive resistance can be improved, the internal stress caused by the pressure change of the connecting passage or the soil settlement can be improved, the temperature stress problem after the support of the connecting platform 207 is excessive can be solved, the structure can be improved without affecting the overall structure, the structural strength can be improved. It should be noted that the connection between the bridge-shaped support 209 and the support rods 201 and the connecting platform 207 can be a buckle type connection, and further fixed to the connecting platform 207 by the damping member 210. After the connecting member 202 is screwed into the two support rods 201, the bridge-shaped support 209 is at least fixed on the support rods 201 and the connecting platform 207 based on the buckle type connection (or other detachable connection method), and further fixed by the anchor bolts of the damping member 210.

[0049] Embodiment 3

[0050] This embodiment can be a further improvement and / or supplement to the foregoing embodiments, and repeated content will not be described again. The overall and / or part of the preferred embodiments of other embodiments can be supplemented as the embodiment of the present application without causing conflict or contradiction.

[0051] The application also relates to a drilling assembly method for a shield connecting channel, which comprises the following steps: connecting a plurality of support rods through connectors to form a polygonal support according to the diameter of the connecting channel; arranging at least three filling cavities attached to the hollow inner wall of the support rod in the support rod, and the filling cavities are provided with first openings at the connectors; and filling the filling cavities with fluid substances to increase the supporting force of the support rod 201 when the fluid substances are injected through the first openings.

[0052] According to a preferred embodiment, the support rod further comprises a wall layer outside the filling cavity, and the wall layer is provided with steel strands for reinforcing the inner arc surface of the polygonal support, wherein at least two steel strands are staggered and embedded in the wall layer to increase the bending resistance of the support rod.

[0053] According to a preferred embodiment, the method further comprises the following steps: connecting two shafts in a cross shape according to the diameter of the shield tunnel to form a support main shaft 1; connecting any two adjacent ends of the support main shaft 1 through a support branch shaft 2; connecting a plurality of support branch shafts 2 through a sliding support guide rail 3; movably connecting one end of a telescopic support rod 4 to the sliding support guide rail 3 so that the telescopic support rod 4 can translate along the axis of the sliding support guide rail 3; and installing a sliding platform 5 capable of adjusting the working position of the drilling equipment at the other end of the telescopic support rod 4.

[0054] According to a preferred embodiment, the sliding support guide rail 3 is arranged along the axial direction of the shield tunnel, so that the sliding platform 5 can slide in the shield tunnel, and the sliding platform 5 can also drive the drilling equipment to rotate at multiple angles on the platform surface. The assembly support of the application can not only be quickly assembled in the hole, but also can slide the drilling equipment on the support to meet the hole position requirements, and the support can reinforce the segments in the hole to meet the opening requirements, replacing the conventional hole door steel ring reinforcement measures.

[0055] The prior art scaffold adopts steel pipe erection, the pipe material selects Φ42mm steel pipe, the wall thickness is 3.5mm, the vertical rod is flat and has no cracks, scabs, burrs, indentations and deep grooves. The fastener is a forged iron fastener, which is damage-free, the movable part is flexible, and the bolt thread is damage-free. The erection points are as follows: the vertical rod is vertically supported on the concrete pipe piece, after each step of the scaffold is completed, the verticality, spacing, longitudinal and transverse horizontal rods, node fasteners are checked and corrected, the step distance, longitudinal distance and transverse distance and the verticality of the vertical rod are checked and corrected, and the lead wire binding is prevented. The vertical rod distance must be connected, the longitudinal horizontal rod preferably adopts butt joint or butt joint, and the scissors support must be butt joint. The horizontal rod length is not less than 1 meter, and 3 fasteners are arranged. The butt joint length of the scissors support is not less than 1 meter, and not less than 2 fasteners. The platforms are connected by 50mm thick wooden boards, which are fixed on the scaffold by lead wire after laying, and are required to be flat and not warped. The construction measures are as follows: the spacing of the vertical rod, large transverse rod and small transverse rod should meet the requirements of the specification and the construction scheme, when the spacing needs to be increased at the door or other places, the spacing should be increased according to the specification. The vertical rod is the main force rod of the scaffold, the spacing is uniformly arranged, the spacing cannot be increased, otherwise the bearing capacity of the vertical rod is reduced; the change of the step distance of the large transverse rod also directly affects the bearing capacity of the scaffold, when the step distance is increased to 1.8m, the critical load is reduced by 27%. The scissors support is an important measure to prevent longitudinal deformation of the scaffold, reasonable arrangement of the scissors support can also enhance the overall stiffness of the scaffold and improve the bearing capacity of the scaffold by more than 12%. Each group of scissors support spans 5-7 vertical rods (>6m), and the angle between the inclined rod and the ground is between 45° and 60°. The single and double row scaffolds with a height of less than 24m must be continuously arranged along the length and height of the outer side facade. The inclined rod of the scissors support should be connected with the vertical rod and the extended small transverse rod. The length of the inclined rod of the scissors support is connected by butt joint, and the butt joint length is not less than 0.5m, and two fasteners are arranged.

[0056] The scaffold erected by the above method is time-consuming and laborious, needs to lay footboards to meet the installation of the drilling device, has a long erection period and is not flexible in use. Each fixed support point of the scaffold is only fixed through the bolt hole in the inner side of the concrete pipe piece, and the remaining support points are suspended, which leads to poor stability, and additional reinforcing devices need to be arranged to ensure construction safety. The drilling device is fixed and cannot be moved after being arranged on the footboard. Since the distribution of the freezing holes is complex during the freezing construction, the drilling device needs to be moved multiple times to improve the accuracy of the freezing holes, and the scaffold of the prior art increases the difficulty of the on-site construction.

[0057] The assembled support developed by the application can provide a mounting and fixing platform for drilling equipment, and the platform can move longitudinally according to the drilling position, and in addition, the platform end has a support rod, which can make the whole platform rise up to 1.2m, satisfying the construction height requirement of the drilling equipment. The support head is provided with a support main shaft and a sliding support rail, and the length of the support rail is determined according to the hole width. After the support main shaft and the sliding support rail are completed, the support rod is used to connect them into a whole. The middle support rod can be increased in interval according to the requirement.

[0058] Throughout the specification, the features introduced by "preferably" are only optional ways, and should not be understood as necessarily provided, therefore the applicant reserves the right to abandon or delete the related preferred features at any time.

[0059] It should be noted that the above specific embodiments are exemplary, and those skilled in the art can think of various solutions under the inspiration of the disclosure of the application, and these solutions also belong to the disclosed range of the application and fall within the protection scope of the application. Those skilled in the art should understand that the specification and drawings of the application are illustrative and do not constitute a limitation on the claims. The protection scope of the application is defined by the claims and their equivalents.

Claims

1. A drill assembly system for a shield junction tunnel, characterized in that, At least comprising: Supporting support shaft (2); wherein, The supporting support shaft (2) comprises a plurality of supporting rod members (201), and the plurality of supporting rod members (201) are connected to form a polygonal support frame through connecting members (202). The supporting rod member (201) is a hollow pipe, and at least three filling cavities (203) are arranged in the supporting rod member (201) and attached to the inner wall of the supporting rod member (201). The filling cavities (203) extend to the connecting members (202) and are provided with first openings at the connecting positions of the connecting members (202), In the case of injecting fluid substances through the first openings, the filling cavities (203) are filled with fluid substances to increase the supporting force of the supporting rod member (201); The supporting rod member (201) further comprises a wall layer (204) outside the filling cavities (203), and the wall layer (204) is provided with steel strands (205) for reinforcing the inner arc surface of the polygonal support frame. At least two steel strands (205) are staggered and embedded in the wall layer to increase the bending resistance of the supporting rod member; The connecting member (202) has a connecting platform (207) in the middle, and the connecting member (202) and the supporting rod member (201) have the same axis. The diameter of the connecting platform (207) is smaller than the outer diameter of the supporting rod member (201). The end of the wall layer (204) connected to the connecting member (202) is provided with at least two compression spring members (208) for increasing the axial force. The compression spring members (208) are equally divided along the circumference of the end surface where the wall layer (204) is located. Part of the compression spring members (208) is pressed into the wall layer (204) by the connecting platform (207), thereby enhancing the structural strength of the supporting rod member (201); The connecting platform (207) is provided with a bridge-shaped support (209) connecting at least two supporting rod members (201). The two single arms of the bridge-shaped support (209) are arranged in axial symmetry on the connecting platform (207) and are connected to the connecting platform (207) away from one end of the two supporting rod members (201), thereby reducing the bending moment and pressure on the supporting rod member (201), The bridge-shaped support (209) and the connecting platform (207) are further provided with a damping member (210). The damping member (210) comprises a first end surface in contact with the two single arm connection points and a second end surface in contact with the connecting platform. The first end surface and the second end surface are connected to the single arm connection points and the connecting platform (207) respectively through anchor bolts for damping and bending resistance. The steel strands (205) are mainly distributed on the inner arc surface of the supporting rod member (201). At least two steel strands (205) are arranged in a manner of surrounding the filling cavities along the wall layer; 2. The drilling assembly system for a shield junction tunnel according to claim 1, wherein, At least one steel strand (205) is arranged along the inner arc surface of the supporting rod member (201) in a manner of penetrating at least two steel strands (205).

3. The drilling assembly system for the shield connection channel according to claim 2, wherein ​ Rib (206) is arranged in the vertical direction of the extension direction of the support rod (201) for reinforcing the inner arc surface of the support rod (201), wherein the spacing between several ribs (206) in the extension direction of the support rod (201) is the same or different, the rib (206) is located in the wall layer, and does not intersect with the steel strand.

4. The drill-in assembly system for a shield junction tunnel according to claim 3, wherein, At least two support rods (201) are combined into the support shaft (2) through the connecting piece (202) to increase the support force, and the two ends of the support rod (201) are provided with internal threads for connecting with the connecting piece (202), and the connecting piece (202) is provided with external threads matched with the internal threads.

5. The drill-in assembly system for a shield junction tunnel according to claim 4, wherein, The system further comprises: A plurality of support main shafts (1); The plane defined by the plurality of support main shafts (1) is perpendicular to the axis of the communication passage, and the adjacent ends of the support main shafts (1) are connected by the support shaft (2), thereby constructing a complete support frame, and the sliding support rail (3) perpendicular to the plane where the support main shaft (1) is located and connected with the end of the support main shaft (1) is connected with the sliding platform (5) capable of adjusting the working position of the drilling equipment through the telescopic support rod (4), The support jack (6) is arranged on the contact surface of the support frame and the inner wall of the communication passage, thereby constructing a polygonal support frame inscribed in the inside of the shield tunnel.

6. A method of bore assembly for a shield junction tunnel, characterized in that, It at least includes the following steps: A plurality of support rods (201) are connected by connecting pieces (202) to form a polygonal support frame according to the diameter of the communication passage; At least three filling cavities (203) attached to the hollow inner wall of the support rod (201) are arranged in the support rod (201), and the filling cavities (203) are provided with first openings at the positions where the connecting pieces (202) are arranged; In the case of injecting fluid substances through the first openings, the filling cavities (203) are filled with fluid substances to increase the support force of the support rod (201); The support rod (201) further comprises a wall layer (204) located outside the filling cavities (203), and the wall layer (204) is provided with steel strands (205) for reinforcing the inner arc surface of the polygonal support frame, wherein at least two steel strands (205) are staggered and embedded in the wall layer to increase the bending resistance of the support rod; The middle of the connecting piece (202) is a connecting table (207), and the connecting piece (202) and the support rod (201) have the same axis, wherein The diameter of the connecting table (207) is smaller than the outer diameter of the support rod (201), the end of the wall layer (204) connected with the connecting piece (202) is provided with at least two compression spring pieces (208) for increasing the axial force, the compression spring pieces (208) are arranged along the circumferential direction of the end surface of the wall layer (204), and a part of the compression spring pieces (208) is pressed into the wall layer (204) by the connecting table (207), thereby enhancing the structural strength of the support rod (201); The connecting platform (207) is provided with a bridge-shaped support (209) connecting at least two support rods (201), two single arms of the bridge-shaped support (209) are arranged on the connecting platform (207) in axial symmetry and connected to the connecting platform (207) away from one end of the two support rods (201), so as to reduce the bending moment and pressure on the support rods (201), The bridge-shaped support (209) and the connecting platform (207) are further provided with a damping member (210), the damping member (210) comprises a first end surface in contact with two single arm connection points and a second end surface in contact with the connecting platform, and the first end surface and the second end surface are connected with the single arm connection points and the connecting platform (207) respectively through anchor bolts for damping and bending resistance.

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