Supporting structure for open excavation construction of subway tunnel

Abstract

The utility model relates to the technical field of foundation pit excavation supporting, in particular to a subway tunnel open excavation construction supporting structure which comprises a structure body, the structure body is formed by combining two side blocking assemblies in parallel, butt joint suites are arranged in the side blocking assemblies, and baffles are assembled in the outer sides of the butt joint suites in an inserted mode; inserting piles are assembled on the backs of the inner sides of the side blocking assemblies in a supporting mode, cross beam assemblies are assembled and supported between the two side blocking assemblies, and a supporting adjusting assembly is assembled between the two cross beam assemblies. The supporting structure of the corresponding scale is supported in a butt joint and splicing mode according to the supporting requirement, and the effect of improving the supporting stability and using convenience of the foundation pit is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of foundation pit excavation support, in particular to a support structure for open excavation construction of a subway tunnel. BACKGROUND

[0002] With the continuous acceleration of urbanization, the urban traffic pressure is increasing, and the subway, as an efficient, convenient and environmentally friendly traffic tool, has been rapidly developed in various cities. The construction methods of the subway tunnel mainly include the open excavation method, the underground excavation method and the shield method, the open excavation construction refers to directly excavating downward on the ground to form the required underground space, and then constructing the subway tunnel structure in the excavated foundation pit, and auxiliary support barriers are needed around the foundation pit during construction so as to prevent collapse and the like during subsequent construction.

[0003] The existing support structure comprises concrete pouring piles drilled and poured on both sides of the tunnel and pile top corbel beams arranged on the top of the concrete pouring piles, triangular supports are arranged on the pile top corbel beams towards the sides of the tunnel, and steel surrounding purlins are arranged on the triangular supports. Steel supports are arranged between the pile top corbel beams on both sides of the tunnel, one end of the steel support is fixedly connected with the pile top corbel beam on the corresponding side, and the other end of the steel support is connected with the pile top corbel beam on the corresponding side through the arrangement of a loose joint and the loose joint. The loose joint comprises an outer cylinder connected with the steel support, an extension part extending into the outer cylinder and a bottom plate connected with the extension part and used for fixing a bottom plate arranged on the steel surrounding purlin, a first triangular reinforcing rib is arranged between the bottom plate and the extension part; and a radial reinforcing mechanism is arranged between the outer cylinder and the first triangular reinforcing rib.

[0004] However, the existing support device is inconvenient to butt joint and splice according to the support needs, so as to support the support structure of the corresponding size, which is prone to insufficient support and safety accidents, and thus needs to be improved. CONTENT OF THE UTILITY MODEL

[0005] In order to improve the stability and convenience of the foundation pit support, the application provides a support structure for open excavation construction of a subway tunnel.

[0006] The support structure for open excavation construction of a subway tunnel provided by the application adopts the following technical scheme:

[0007] The support structure for open excavation construction of a subway tunnel comprises a structure main body, the structure main body is formed by parallel combination of two groups of side blocking components, a butt joint set is arranged inside the side blocking component, a baffle is arranged inside the butt joint set, a plug is arranged between two adjacent baffles, a plug pile is arranged on the back of the inside of the side blocking component, a cross beam component is arranged between the two groups of side blocking components, and an adjusting support component is arranged between the two groups of cross beam components.

[0008] By adopting the above technical scheme, the baffle is inserted into the butt joint set, and further, the baffle and the insertion strip form a corresponding side blocking assembly under the cooperation of the butt joint set. The insertion strip is assembled at the rear side of the side blocking assembly, so that the insertion support at the bottom of the foundation pit is more convenient. The preliminary erection of the side blocking assembly is facilitated, and the side wall of the foundation pit during the open cut construction of the subway tunnel is preliminarily supported. Then, under the support of the cross beam assembly, the fine adjustment of the supporting adjusting assembly is facilitated, and the two groups of side blocking assemblies are conveniently and stably supported. In this way, the support structure of a corresponding size is conveniently combined to perform support construction.

[0009] Optionally, the butt joint set comprises a sleeve frame, a plate groove and a strip groove corresponding to the baffle and the insertion strip are formed in the outer wall of the sleeve frame, and a back strip is integrally arranged on the upper and lower surfaces of the sleeve frame.

[0010] By adopting the above technical scheme, during assembly, the baffle and the insertion strip are conveniently and limitingly inserted through the cooperation of the plate groove and the strip groove. Then, under the arrangement of the back strip, the support of the back of the baffle and the insertion strip in cooperation with the sleeve frame is facilitated, so that subsequent use is more convenient.

[0011] Optionally, a self-tapping screw is threadedly assembled in the back strip, and the inner end of the self-tapping screw abuts against the side wall of the baffle and the insertion strip. A self-tapping screw hole corresponding to the self-tapping screw is formed in the back strip, and a reinforcing rib leg is equidistantly supported on the back of the back strip. Corresponding mounting screw holes are formed in the inner sides of both ends of the sleeve frame.

[0012] By adopting the above technical scheme, under the assembly of the self-tapping screw, the insertion of the baffle and the insertion strip is conveniently and limitingly fastened, so that the assembly is more stable and convenient. Further, under the cooperation of the edge groove and the mounting screw hole, the assembly and splicing between the adjacent two groups of sleeve frames are facilitated by using related screws, so that a relatively stable whole is formed.

[0013] Optionally, the cross beam assembly comprises a top column and a support column, and an insertion sleeve is sleeved and assembled between the top column and the support column. An insertion socket is sleeved on the end of the top column away from the insertion sleeve. The insertion socket is assembled on the back of the butt joint set by a screw. A clamping head corresponding to the insertion socket is integrally arranged on the end of the top column away from the insertion sleeve. The supporting adjusting assembly comprises an insertion cylinder, which is sleeved and assembled on the end of the support column away from the insertion sleeve, and the insertion cylinder and the insertion sleeve are arranged in the same way.

[0014] By adopting the above technical scheme, after the side blocking assembly is preliminarily erected and supported, according to the distance between the top column and the insertion sleeve, a corresponding number of support columns are selected to be inserted and expanded to form a cross beam of a corresponding length for support, so as to stably support the subsequent operation. At the same time, the insertion cylinder is cooperated with the insertion sleeve in the middle part to facilitate the auxiliary assembly, so as to facilitate the subsequent fine adjustment and support operation.

[0015] Optionally, the sleeve is integrally provided with the same sleeve on both sides, the inner wall of the sleeve is integrally fixed with an inner screw, two groups of the inner screw are threadedly inserted into the side end of the top column and the support column, and the inside of the side end of the top column and the support column is provided with an inner screw hole corresponding to the inner screw.

[0016] By adopting the above technical scheme, when the sleeve is assembled with the top column and the support column, the inner screw and the inner screw hole are matched to assist the butt joint, so that the butt joint is more stable, and the corresponding hanging rod support can be assembled under the cooperation of the cylinder hinge seat and the hinge hole to strengthen the support.

[0017] Optionally, the cross section of the clamping head is hexagonal, the inside of the socket is provided with an inner groove corresponding to the clamping head, the inside of the socket and the clamping head is assembled by inserting the latch, and the inside of the side wall of the socket and the clamping head is provided with a pin hole corresponding to the latch.

[0018] By adopting the above technical scheme, under the assembly of the socket, the top column and the sleeve frame can be directly and stably inserted and supported, so that the subsequent use and assembly are more convenient.

[0019] Optionally, the supporting adjusting assembly further comprises a push block, two groups of the push block are located between the two groups of the insertion cylinder, and the two groups of the push block are aligned up and down, the outer wall of the insertion cylinder and the outer side of the push block are hingedly connected by a push rod through an auxiliary hinge seat, the outer wall of the insertion cylinder and the push block is fixed with a screw pin corresponding to the auxiliary hinge seat, two groups of the push block is threadedly inserted with a screw column, and the screw column is symmetrically and oppositely arranged at the upper and lower ends.

[0020] By adopting the above technical scheme, after the horizontal beam assembly is assembled and supported, corresponding to the remaining space in the middle, and the remaining space is smaller than the length of the support column, through the cooperation of the supporting adjusting assembly, under the rotation of the screw column, the push block is conveniently pushed to move, so that under the hinged cooperation of the push rod, the two groups of insertion cylinders are conveniently expanded to form corresponding support, so that the supporting operation is more convenient.

[0021] Optionally, the screw column is integrally provided with a torsion block in the middle, and the cross section of the torsion block is hexagonal assembly, the screw column is threadedly sleeved with a nut at the upper and lower outer ends, and the nut is located outside the push block.

[0022] By adopting the above technical scheme, when the screw column is operated, the torsion block is rotated to make the operation of rotating and fine tuning more convenient, and after the support is adjusted, the nut is used for auxiliary limiting and reinforcement, so that the subsequent use is more stable.

[0023] Optionally, the rear wall of the butt joint set is assembled with a hoop corresponding to the insertion stake, and the hoop is assembled with a holding arm outside, and the bottom end of the insertion strip and the insertion stake is provided in a sharp conical shape.

[0024] By adopting the technical scheme, the assembly and installation can be performed one by one according to needs, and then binding is performed, and the insertion of the insertion strip and the insertion stake is also more convenient.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. By inserting the adapter kit and the baffle, and simultaneously inserting the insertion strip, the relevant bolt combination can be formed into a corresponding side baffle assembly; under the support of the insertion stake, the side baffle assembly can be preliminarily erected and supported, and preliminary maintenance can be formed; the two groups of side baffle assemblies are supported by the transverse support of the cross beam assembly, so that the support is more stable, and when the space expanded by the remaining group of support pillars is insufficient, the support can be fine-tuned by assembling the adjusting support assembly, so as to form a corresponding scale support structure to support the foundation pit formed during the open cut construction of the subway tunnel, which is more convenient and efficient to use.

[0027] 2. By setting the corresponding internal structure, the support assembly of the baffle and the insertion strip can be facilitated by cooperating with the adapter kit, and the auxiliary support assembly of the insertion stake and the cross beam assembly can be facilitated by cooperating with the clamp and the socket; and during use, the horizontal support assembly of the corresponding number of jacks and support pillars can be facilitated by the insertion sleeve, and the external reinforcement support of the insertion sleeve can also be facilitated, so that the support is more stable and the operation is more convenient, so as to facilitate the auxiliary formation of a corresponding scale support structure to support the foundation pit formed during the open cut construction of the subway tunnel, which is more convenient and efficient to use. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic view of a support structure for open cut construction of a subway tunnel according to an embodiment of the present application.

[0029] Figure 2 is a bottom view of the structural main body according to an embodiment of the present application.

[0030] Figure 3 is a structural schematic view of a side baffle assembly according to an embodiment of the present application.

[0031] Figure 4 is a structural schematic view of an adapter kit according to an embodiment of the present application.

[0032] Figure 5 is a structural schematic view of an adjusting support assembly according to an embodiment of the present application.

[0033] Figure 6 is a structural schematic view of a cross beam assembly according to an embodiment of the present application.

[0034] Explanation of reference signs: 100, structural body; 101, baffle; 102, insert strip; 103, insert pile; 110, side blocking assembly; 120, butt joint set; 121, frame; 122, plate slot; 123, strip slot; 124, back strip; 125, self-tapping screw; 126, self-tapping hole; 127, reinforcing rib foot; 128, edge slot; 129, mounting hole; 130, cross beam assembly; 131, top column; 132, support column; 133, insert sleeve; 134, sleeve; 135, internal screw head; 136, internal screw hole; 137, clamping head; 138, cylinder hinge seat; 139, hinge seat insertion hole; 140, adjusting support assembly; 141, insert cylinder; 142, push block; 143, push rod; 144, stud; 145, torsion block; 146, nut; 147, auxiliary hinge seat; 148, screw pin; 150, hoop; 151, arm; 160, socket; 161, inner slot; 162, bolt; 163, pin hole; 164, screw bolt. DETAILED DESCRIPTION

[0035] The following will be described in detail below with reference to the accompanying drawings. Figures 1-6 The present application is further described in detail.

[0036] The embodiment of the present application discloses a support structure for open cut construction of a subway tunnel. Referring to Figure 1 and Figure 2 The support structure for open cut construction of a subway tunnel comprises a structural body 100 formed by two groups of parallel combined side blocking assemblies 110. The butt joint set 120 is arranged inside the side blocking assembly 110, the baffle 101 is arranged inside the butt joint set 120, and the insert strip 102 is arranged between the two adjacent baffles 101. The insert pile 103 is arranged on the inner side of the back of the side blocking assembly 110, the cross beam assembly 130 is arranged between the two groups of side blocking assemblies 110, and the adjusting support assembly 140 is arranged between the two groups of cross beam assemblies 130. The hoop 150 corresponding to the insert pile 103 is arranged on the rear wall of the butt joint set 120, the arm 151 is arranged on the outer side of the hoop 150, and the bottom ends of the insert strip 102 and the insert pile 103 are arranged in a sharp taper shape.

[0037] In operation, the baffles 101 and the insert strips 102 are arranged one by one under the cooperation of the butt joint set 120 to form the corresponding side blocking assemblies 110, the insert pile 103 is arranged and assembled at the bottom of the corresponding area, and finally the insert pile 103 is installed and supported with the side blocking assembly 110 under the cooperation of the hoop 150 and the arm 151 for preliminary support, and then the cross beam assembly 130 and the adjusting support assembly 140 are cooperated for auxiliary transverse strengthening support, so as to facilitate the foundation pit support during the open cut construction of the subway tunnel.

[0038] Referring to Figure 3 and Figure 4The docking kit 120 comprises a sleeve frame 121, and the outer side inner wall of the sleeve frame 121 is provided with a plate slot 122 and a strip slot 123 corresponding to the baffle 101 and the insertion strip 102. The upper and lower surfaces of the sleeve frame 121 are integrally provided with a back strip 124, and the side edges of the back strip 124 are flush with the inner side walls of the plate slot 122 and the strip slot 123. The inside of the back strip 124 is threadedly fitted with a self-tapping screw 125, and the inner end of the self-tapping screw 125 abuts against the side wall of the baffle 101 and the insertion strip 102. The inside of the back strip 124 is provided with a self-tapping screw hole 126 corresponding to the self-tapping screw 125, and the back of the back strip 124 is equidistantly supported by a reinforcing rib foot 127. The inner side of the sleeve frame 121 is provided with a corresponding edge slot 128 at both ends, and the inside of the edge slot 128 is provided with a corresponding mounting screw hole 129.

[0039] In assembly, the baffle 101 and the insertion strip 102 are respectively inserted through the plate slot 122 and the strip slot 123, and then the edge slot 128 and the mounting screw hole 129 are assembled to form an integral whole under the cooperation of the bolts, so that subsequent support and protection are more convenient.

[0040] Referring to Figure 3 and Figure 6 , the cross beam assembly 130 comprises a top column 131 and a support column 132, and the insertion sleeve 133 is sleeved and assembled between the top column 131 and the support column 132. The end of the top column 131 away from the insertion sleeve 133 is sleeved with a socket 160, the socket 160 is assembled on the back of the docking kit 120 through a screw 164, and the end of the top column 131 away from the insertion sleeve 133 is integrally provided with a clamping head 137 corresponding to the socket 160.

[0041] Referring to Figure 5 and Figure 6 , the adjusting support assembly 140 comprises an insertion cylinder 141, which is sleeved and assembled at the end of the support column 132 away from the insertion sleeve 133, and the insertion cylinder 141 is the same as the insertion sleeve 133. The insertion sleeve 133 is integrally provided with a sleeve cylinder 134 on both sides, the inner wall of the sleeve cylinder 134 is integrally fixed with an inner screw head 135, two groups of inner screw heads 135 are threadedly inserted into the side ends of the top column 131 and the support column 132, and the inside of the side ends of the top column 131 and the support column 132 is provided with an inner screw hole 136 corresponding to the inner screw head 135. The outer wall of the insertion sleeve 133 is integrally provided with a cylinder hinge base 138, and the inside of the cylinder hinge base 138 is provided with a hinge base insertion hole 139. The clamping head 137 is hexagonal in cross section, and the inside of the socket 160 is provided with an inner groove 161 corresponding to the clamping head 137. The inside of the socket 160 and the clamping head 137 is inserted and assembled by a latch 162, and the inside of the side walls of the socket 160 and the clamping head 137 is provided with a pin hole 163 corresponding to the latch 162.

[0042] When the lateral support between the two groups of lateral stop assemblies 110 is strengthened, according to the horizontal distance between them, a corresponding number of struts 132 are combined with the top column 131 to assemble a corresponding length of cross beam under the cooperation of the bushing 133, and the butt joint set 120 is installed and butt jointed on the inner side under the cooperation of the socket 160 and the clamp 137, which facilitates subsequent support and stabilization.

[0043] With reference to Figure 5 and Figure 6 The supporting assembly 140 further comprises push blocks 142, two groups of which are located between the two groups of insertion cylinders 141 and are aligned vertically. The insertion cylinders 141 and the push blocks 142 are hingedly connected by auxiliary hinges 147 through push rods 143. The insertion cylinders 141 and the push blocks 142 are both provided with screw pins 148 corresponding to the auxiliary hinges 147. The two groups of push blocks 142 are internally threaded with screw posts 144, and the upper and lower ends of the screw posts 144 are oppositely and symmetrically threaded. The screw posts 144 are integrally provided with torsion blocks 145 in the middle, and the cross section of the torsion blocks 145 is hexagonal. The screw posts 144 are externally threaded with nuts 146 at the upper and lower ends, and the nuts 146 are located on the outer side of the push blocks 142.

[0044] When supporting horizontally between the lateral stop assemblies 110, the supporting assembly 140 facilitates auxiliary fine adjustment of the support between the two groups of cross beam assemblies 130 at the middle position. By rotating the screw posts 144 to drive the push blocks 142 to push the push rods 143 to support the insertion cylinders 141, the two groups of insertion cylinders 141 are gradually separated and expanded to form a corresponding length of support, making the operation more stable.

[0045] The implementation principle of the supporting structure for open cut construction of a subway tunnel is as follows: when the foundation pit formed by the open cut construction of a subway tunnel needs to be supported, a corresponding number of sleeve frames 121 are selected according to the specifications of the side walls of the foundation pit, and are butt jointed by bolt assembly under the cooperation of the side grooves 128 and the mounting screw holes 129. Then, the baffle plates 101 and the insertion strips 102 are inserted and assembled in the sleeve frames 121, and the insertion strips 102 and the baffle plates 101 are reinforced and limited by the sleeve frames 121 under the cooperation of the back strips 124 and the self-tapping screw holes 126 through self-tapping screws 125. In this way, the lateral stop assemblies 110 of corresponding specifications are formed by splicing and assembling, and the insertion piles 103 are inserted and assembled in the bottom of the side walls of the foundation pit and are pressurized to make them stand and fasten.

[0046] Subsequently, under the cooperation of the arm 151 and the hoop 150, the side stop assembly 110 is assembled and positioned with the stake 103 to support, thereby facilitating the preliminary support of the side wall of the foundation pit. After the preliminary support of the side wall of the foundation pit by the side stop assembly 110, horizontal reinforcement support is carried out between the two groups of side stop assemblies 110 as needed. A corresponding number of support columns 132 are selected on both sides, and under the cooperation of the insertion sleeve 133, the inner screw head 135 and the inner screw hole 136 are cooperated to facilitate the butt joint of the support column 132 and the top column 131, so as to form a corresponding cross beam assembly 130 on both sides to support, and under the cooperation of the socket 160, the butt joint assembly 120 is butt jointed and supported.

[0047] Finally, after the assembly and support of the two cross beam assemblies 130, the remaining space formed between the two groups of cross beam assemblies 130 is assembled and adjusted by the adjusting assembly 140 to fine-tune the support. The two groups of insertion cylinders 141 are respectively sleeved and assembled with the outer ends of the support columns 132, and then the knob 145 is rotated to drive the stud 144 to rotate. Under the symmetrical and opposite arrangement of the threads at both ends, the push block 142 is synchronously pushed to push the rod 143 to support the insertion cylinder 141 under the cooperation of the threads, so that the two groups of insertion cylinders 141 are expanded outward to form support, so as to cooperate with the cross beam assemblies 130 on both sides to horizontally support the side stop assemblies 110 on both sides. During assembly, corresponding support rods, ropes and the like can be selected under the cooperation of the auxiliary hinge base 147 and the cylinder hinge base 138 for auxiliary reinforcement assembly as needed.

[0048] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made in terms of structure, shape and principle based on the present application should be covered within the protection scope of the present application.

Claims

1. A support structure for open cut construction of a subway tunnel, comprising a structural body (100) formed by two parallel sets of side wall assemblies (110), characterised in that: The side blocking assembly (110) is internally provided with a docking kit (120), the outer side of the docking kit (120) is internally provided with a baffle (101), and the adjacent two groups of baffles (101) are provided with an insertion strip (102). The inside of the side blocking assembly (110) is supported and assembled with an insertion stake (103), two groups of the side blocking assembly (110) are assembled and supported with a cross beam assembly (130), and two groups of the cross beam assembly (130) are assembled with a supporting assembly (140).

2. A support structure for open cut construction of a subway tunnel according to claim 1, wherein: The docking kit (120) comprises a sleeve frame (121), the inner wall of the outer side of the sleeve frame (121) is provided with a plate groove (122) and a strip groove (123) corresponding to the baffle (101) and the insertion strip (102), and the upper and lower surfaces of the sleeve frame (121) are integrally provided with a back strip (124), and the side edges of the back strip (124) are flush with the inner walls of the plate groove (122) and the strip groove (123).

3. A support structure for open cut construction of a subway tunnel according to claim 2, wherein: The inside of the back strip (124) is screw-assembled with a self-tapping screw (125), and the inner end of the self-tapping screw (125) abuts against the side wall of the baffle (101) and the insertion strip (102). The inside of the back strip (124) is provided with a self-tapping screw hole (126) corresponding to the self-tapping screw (125), and the back of the back strip (124) is equidistantly supported with a reinforcing rib foot (127). The inner sides of both ends of the sleeve frame (121) are provided with mutually corresponding edge grooves (128), and the inside of the edge groove (128) is provided with a corresponding mounting screw hole (129).

4. A support structure for open cut construction of a subway tunnel according to claim 1, wherein: The cross beam assembly (130) comprises a top column (131) and a support column (132), and the top column (131) and the support column (132) are sleeved and assembled with an insertion sleeve (133). The end of the top column (131) away from the insertion sleeve (133) is sleeved with a socket (160), and the socket (160) is assembled on the back of the docking kit (120) through a screw (164). The end of the top column (131) away from the insertion sleeve (133) is integrally provided with a clamping head (137) corresponding to the socket (160). The supporting assembly (140) comprises an insertion cylinder (141), which is sleeved and assembled at the end of the support column (132) away from the insertion sleeve (133), and the insertion cylinder (141) and the insertion sleeve (133) are arranged in the same way.

5. A support structure for open cut construction of a subway tunnel according to claim 4 wherein: The two sides of the insertion sleeve (133) are integrally provided with the same sleeve (134), and the inner wall of the sleeve (134) is integrally fixed with an inner screw head (135). Two groups of the inner screw head (135) are threadedly inserted into the side ends of the top column (131) and the support column (132), and the inside of the side end of the top column (131) and the support column (132) is provided with an inner screw hole (136) corresponding to the inner screw head (135). The outer wall of the insertion sleeve (133) is integrally provided with a cylinder hinge base (138), and the inside of the cylinder hinge base (138) is provided with a hinge base insertion hole (139).

6. A support structure for open cut construction of a subway tunnel according to claim 4 wherein: The clamping head (137) is hexagonal in cross section, the socket (160) is internally provided with an inner groove (161) corresponding to the clamping head (137), the socket (160) and the clamping head (137) are internally assembled by a plug pin (162), and the socket (160) and the clamping head (137) are internally provided with pin holes (163) corresponding to the plug pin (162).

7. A support structure for open cut construction of a subway tunnel according to claim 4, wherein: The supporting adjusting assembly (140) further comprises push blocks (142), two groups of the push blocks (142) are located between the two groups of the insertion sleeves (141), and the two groups of the push blocks (142) are aligned in an up-down direction, the insertion sleeve (141) and the push block (142) are hingedly provided with a push rod (143) between the outer wall of the insertion sleeve (141) and the outer side of the push block (142) through an auxiliary hinge base (147), the insertion sleeve (141) and the push block (142) are fixedly provided with screw pins (148) corresponding to the auxiliary hinge base (147), two groups of the push blocks (142) are internally and threadedly provided with threaded rods (144), and the threaded rods (144) are oppositely arranged in a symmetrical manner at the upper and lower ends.

8. A support structure for open cut construction of a subway tunnel according to claim 7 wherein: The threaded rod (144) is integrally provided with a torsion block (145) at the middle portion, the torsion block (145) is hexagonal in cross section, the threaded rod (144) is externally and threadedly provided with nuts (146) at the upper and lower ends, and the nuts (146) are located at the outer side of the push block (142).

9. A support structure for open cut construction of a subway tunnel according to claim 1, wherein: The butt joint kit (120) is provided with a hoop (150) corresponding to the insertion stake (103) on the rear wall, and the hoop (150) is provided with a holding arm (151) on the outer side, and the insertion strip (102) and the insertion stake (103) are both provided in a sharp conical shape at the bottom end.

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