A temporary support device for tunnel excavation

Abstract

The present invention discloses a temporary support device, wherein a main steel frame is connected to an upper transverse portion of the main steel frame by a connecting rod; the main steel frame is connected to a lower transverse portion of the main steel frame by a connecting plate, the top of the main steel frame is a transverse fixing frame, the top of the transverse fixing frame is an upper steel frame, the upper steel frame is connected to an upper transverse portion of the upper steel frame by a connecting plate; the upper steel frame is connected to a lower transverse portion of the upper steel frame by a connecting rod; the transverse fixing frame is vertically connected to a longitudinal fixing frame and the longitudinal fixing frame is vertically connected to the main steel frame, and the longitudinal fixing frame is connected to the connecting plate by a supporting rod. The temporary support device disclosed in the present invention can not only be flexibly adjusted and conveniently disassembled, thus saving construction time and cost, but also improving construction efficiency and increasing the service life of the structure, while ensuring stability and safety during construction.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, in particular to a temporary supporting device for tunnel excavation. Background Art

[0002] Temporary support refers to a temporary support method that takes measures to support the roof to prevent rocks from falling during underground operations so that construction can continue.

[0003] With the continuous development of tunnel engineering, there are more and more large-span tunnels. The one-time excavation of large-section tunnels will cause the working face to be exposed for too long, the load to be released quickly, and other problems will cause the surrounding rock to be unstable, increasing the risk of tunnel construction. Therefore, the idea of ​​tunnel excavation in blocks has gradually become popular. Under the geological conditions of poor surrounding rock, more and more large-span tunnel construction adopts the construction method of block excavation + temporary support. Temporary support is a temporary structure to improve safety during tunnel excavation. It has low requirements for closing the surrounding rock and protecting the strength of the surrounding rock. As long as the strength, rigidity and integrity of the temporary support can be guaranteed, the temporary support function can be exerted; the existing temporary support method usually adopts a skeleton sprayed concrete composed of steel arch frame + longitudinal connecting ribs + steel mesh. This temporary support structure has high strength and rigidity, which can fully meet the needs of safe production. However, such a structure is difficult to install and dismantle. During dismantling, the concrete needs to be broken up manually or with the help of external force so that the steel arch frame, longitudinal connecting bars and steel mesh can be dismantled one by one, which brings inconvenience to the dismantling. Since the current existing technology adopts large steel arch frames for connection, each time the personnel perform dismantling and installation, it is very time-consuming and labor-intensive, which will not only reduce the construction progress of the tunnel project, but also cause serious wear and tear of the components between the temporary support structures due to repeated installation and dismantling of the temporary support structures, thereby affecting their stability and safety and reducing their service life.

[0004] CN110529159B proposes a temporary support device, including several groups of protection mechanisms, each group of protection mechanisms is detachably connected, the protection mechanism includes a fixed frame, a fixed shaft and a rotating sleeve, an adjusting plate is movably connected to the rotating sleeve, the adjusting plate is movably connected to the steel frame, adjacent steel frames are detachably connected with connecting ribs, an adjusting reinforcement mechanism is detachably installed on the space formed by the steel frame and the connecting ribs, the adjusting reinforcement mechanism includes a reinforcement part and a lifting part, and a waterproof part is detachably connected to the bottom of the steel frame. Therefore, there is an urgent need for a temporary support device that can not only be flexibly adjusted and easily disassembled, saves construction time and cost, but also can improve construction efficiency, increase the service life of the entire structure, and ultimately ensure stability and safety during construction. Summary of the invention

[0005] The purpose of the present invention is to provide a temporary support device for tunnel excavation to solve the problems existing in the above-mentioned prior art. It can not only be flexibly adjusted and conveniently disassembled, saving construction time and cost, but also can improve construction efficiency and increase the service life of the structure, and ultimately ensure stability and safety during the construction process.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a temporary support device,

[0007] It includes a main steel frame, a lower adjustment plate, an upper adjustment plate, an upper steel frame, a transverse fixing frame, a longitudinal fixing frame, a convex sliding block, a connecting plate, a connecting rod, a support rod, a reinforcement plate, a support block A, a connecting shaft A, a through hole A, a connecting shaft B, a connecting shaft C, a support block B, a connecting shaft C, a connecting shaft D, a spiral tooth surface, a trolley, and a leg; wherein the upper steel frame includes an upper steel frame A and an upper steel frame B; the support rod includes a first upper support rod, a second upper support rod, a first lower support rod, a second lower support rod, a third lower support rod, a fourth lower support rod, a third upper support rod, and a fourth upper support rod, and the fourth upper support rod includes a cylindrical threaded rod and a concave Groove threaded rod, connecting shaft D includes connecting shaft D handle, connecting shaft D outer spiral rod, connecting shaft D smooth rod, the main steel frame is connected to the upper lateral part of the main steel frame by a connecting rod; the main steel frame is connected to the lower lateral part of the main steel frame by a connecting plate, the bottom end of the main steel frame is connected to the trolley, the two sides of the trolley are legs, the top of the main steel frame is a transverse fixing frame, the top of the transverse fixing frame is an upper steel frame, the upper steel frame is connected to the upper lateral part of the upper steel frame by a connecting plate; the upper steel frame is connected to the lower lateral part of the upper steel frame by a connecting rod; the transverse fixing frame is vertically connected to the longitudinal fixing frame and the longitudinal fixing frame is vertically connected to the main steel frame, and the longitudinal fixing frame is connected to the connecting plate by a supporting rod.

[0008] Preferably, the bottom end of the longitudinal fixing frame is symmetrically connected to the main steel frame through the first lower support rod and the second lower support rod, and the top end of the longitudinal fixing frame is connected to the upper steel frame through the first upper support rod and the second upper support rod.

[0009] Preferably, the center position of the connecting plate is a reinforcement plate vertically, and two support blocks A are symmetrically arranged at the center position of the outer surface of the reinforcement plate. The two support blocks A are rotatably connected to the support rod through a connecting shaft A in the middle.

[0010] Preferably, a telescopic device is arranged in the middle of the support rod, a cylindrical threaded rod is arranged at one end of the telescopic device, and an inner groove threaded rod whose outer diameter is consistent with that of the support rod is arranged at the other end, and the inner groove threaded rod cooperates with the cylindrical threaded rod.

[0011] Preferably, a plurality of through holes are opened on the main steel frame and the upper steel frame, and a plurality of through holes A of the same size as the main steel frame are opened on the lower adjustment plate and the upper adjustment plate, and a connecting shaft B is detachably connected to the through hole A, and the length of the connecting shaft B is three times the length of the through hole A plus twice the length of the nut.

[0012] Preferably, two upper grooves are arranged on the top surface of the horizontal fixing frame, and two lower grooves with the same size as the top surface are arranged on the bottom surface; two groups of upper adjustment plates are installed in the upper grooves, and the two groups of upper adjustment plates are rotatably connected to the upper grooves through connecting shafts B; two groups of lower adjustment plates are installed in the lower grooves, and the two groups of lower adjustment plates are movably connected to the upper grooves through two connecting shafts B.

[0013] Preferably, a convex groove is provided in the longitudinal fixed frame, a convex sliding block is installed in the convex groove, two support blocks B are installed at the front end of the top face of the convex sliding block, and the first upper support rod or the second upper support rod is between the two support blocks B. The first upper support rod or the second upper support rod is rotatably connected to the support block B through the connecting shaft E.

[0014] Preferably, a plurality of square grooves are arranged on both sides of the convex sliding block on the surface of the longitudinal fixing frame, a circular hole is arranged directly below the square groove and passes through the longitudinal fixing frame, a connecting shaft D is installed in the circular hole, the top of the connecting shaft D is a connecting shaft D handle, the longitudinal fixing frame section is a connecting shaft D smooth rod, and the sliding block section is a connecting shaft D outer spiral rod.

[0015] Preferably, the contact side of the sliding block with the connecting shaft D is set as a spiral tooth surface, the height of the spiral tooth surface is consistent with the height of the outer spiral rod of the connecting shaft D, and the length of the spiral tooth surface is the distance between the outermost square groove and the innermost square groove on the longitudinal fixing frame.

[0016] The present invention discloses the following technical effects: the temporary support device disclosed by the present invention, the main steel frame is connected with the upper lateral part of the main steel frame by a connecting rod; the main steel frame is connected with the lower lateral part of the main steel frame by a connecting plate, the top of the main steel frame is a transverse fixing frame, the top of the transverse fixing frame is an upper steel frame, the upper steel frame is connected with the upper lateral part of the upper steel frame by a connecting plate; the upper steel frame is connected with the lower lateral part of the upper steel frame by a connecting rod; the transverse fixing frame is vertically connected to the longitudinal fixing frame and the longitudinal fixing frame is vertically connected to the main steel frame, and the longitudinal fixing frame is connected to the connecting plate by a supporting rod.

[0017] According to the required support height, reasonably select the height of the upper steel frame to ensure that the combined height of the trolley's outriggers, the main steel frame, the transverse fixed frame and the upper steel frame is close to the support height and the support width meets the requirements; for tunnels with curved cross-sections, consider using multiple upper steel frames of different lengths or adjusting the angle of a certain upper steel frame to meet the requirements of the curve top surface during support, assemble the main steel frame, the lower adjustment plate, the upper adjustment plate, multiple upper steel frames and the transverse fixed frame into one, and then assemble the transverse fixed frame and the longitudinal fixed frame, connect the first upper support rod, the second upper support rod, the third upper support rod, the fourth upper support rod and the first lower support rod, the second lower support rod, the third lower support rod and the fourth lower support rod to the main steel frame, multiple upper steel frames and the longitudinal fixed frame respectively, and then place them on the trolley below the position to be supported, and open the trolley's outriggers to provide stability. Open the connecting shaft D, turn the connecting shaft D handle by hand, the connecting shaft D handle drives the connecting shaft D outer spiral rod to rotate, and the spiral tooth surface is driven to move longitudinally through the connecting shaft D outer spiral rod, and the longitudinal movement of the spiral tooth surface drives the convex sliding block to move, and the convex sliding block moves through the first lower support rod and the second lower support rod to drive the upper steel frame to move longitudinally. When multiple upper steel frames can contact the supporting surface well, turn the connecting shaft D handle by hand to close it to complete the temporary support work. The above technical solution can not only perform flexible adjustment and convenient disassembly, save construction time and cost, but also improve construction efficiency and increase the service life of the structure, and ultimately ensure stability and safety during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic structural diagram of the temporary support device in the present invention.

[0020] Figure 2 It is a right view of the temporary support device of the present invention working alone.

[0021] Figure 3 It is a right view of the composite working of the temporary support device in the present invention.

[0022] Figure 4 It is a right view of the inclined support composite work of the temporary support device in the present invention.

[0023] Figure 5 This is a top view of the temporary support device of the present invention working alone.

[0024] Figure 6It is a top view of the composite working of the temporary support device in the present invention.

[0025] Figure 7 It is a top view of the inclined support composite working of the temporary support device in the present invention.

[0026] Figure 8 This is an enlarged view of the support rod structure.

[0027] Fig. 9 for Figure 3 Side view of the mid-AA section.

[0028] Fig.10 It is a top view of the longitudinal fixing frame.

[0029] Fig.11 for Fig. 9 Enlarged view of the middle connecting shaft D.

[0030] Fig.12 for Fig.11 Enlarged view of the CC section.

[0031] Fig.13 for Fig. 9 Middle BB cross-section profile.

[0032] Among them, the main steel frame 1, the lower adjustment plate 2, the upper adjustment plate 3, the upper steel frame 4, the upper steel frame A41, the upper steel frame B42, the transverse fixing frame 5, the connecting plate 6, the connecting rod 7, the support rod 8, the first upper support rod 81, the second upper support rod 82, the first lower support rod 83, the second lower support rod 84, the third lower support rod 85, the fourth lower support rod 86, the third upper support rod 87, the fourth upper support rod 88, the cylindrical threaded rod 881, the inner groove threaded rod 882, the longitudinal fixing frame 9, the convex sliding block 91, the reinforcement plate 10, the support block A11, the connecting shaft A12, the through hole A13, the connecting shaft B14, the connecting shaft C15, the support block B16, the connecting shaft E17, the connecting shaft D18, the connecting shaft D handle 181, the connecting shaft D outer spiral rod 182, the connecting shaft D smooth rod 183, the spiral tooth surface 19, the trolley 20, and the support leg 21. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1.

[0036] like Figure 1-2 , Figure 5 , Figure 8-13 As shown, the present invention provides a temporary support device, including a main steel frame 1, a lower adjustment plate 2, an upper adjustment plate 3, an upper steel frame 4, a transverse fixing frame 5, a longitudinal fixing frame 9, a convex sliding block 91, a connecting plate 6, a connecting rod 7, a support rod 8, a reinforcing plate 10, a support block A11, a connecting shaft A12, a through hole A13, a connecting shaft B14, a connecting shaft C, a support block B16, a connecting shaft E17, a connecting shaft D18, a spiral tooth surface 19, a trolley 20, and a leg 21; wherein the upper steel frame 4 includes an upper steel frame A41 and an upper steel frame B42; the support rod 8 includes a first upper support rod 81, a second upper support rod 82, a first lower support rod 83, and a second lower support rod 84; the connecting shaft D18 includes a connecting shaft The connecting shaft D handle 181, the connecting shaft D outer spiral rod 182, the connecting shaft D smooth rod 183, the main steel frame 1 is connected to the main steel frame 1 at the upper lateral part through the connecting rod 7; the main steel frame 1 is connected to the main steel frame 1 at the lower lateral part through the connecting plate 6, the bottom end of the main steel frame 1 is connected to the trolley 20, and the two sides of the trolley 20 are support legs 21, the top of the main steel frame 1 is the transverse fixing frame 5, the top of the transverse fixing frame 5 is the upper steel frame 4, the upper steel frame 4 is connected to the upper lateral part of the upper steel frame 4 through the connecting plate 6; the upper steel frame 4 is connected to the upper lateral part of the upper steel frame 4 through the connecting rod 7; the transverse fixing frame 5 is vertically connected to the longitudinal fixing frame 9 and the longitudinal fixing frame 9 is vertically connected to the main steel frame 1, and the longitudinal fixing frame 9 is connected to the connecting plate 6 through the supporting rod 8.

[0037] According to a further optimization scheme, the bottom end of the longitudinal fixing frame 9 is symmetrically connected to the main steel frame 1 through the first lower support rod 83 and the second lower support rod 84, and the top end of the longitudinal fixing frame 9 is connected to the upper steel frame 4 through the first upper support rod 81 and the second upper support rod 82.

[0038] According to a further optimization scheme, the center of the connecting plate 6 is vertically provided with a reinforcing plate 10, and two supporting blocks A11 are symmetrically arranged at the center of the outer surface of the reinforcing plate 10, and the middle of the two supporting blocks A11 is rotatably connected to the supporting rod 8 via a connecting shaft A12.

[0039] A further optimization scheme is that a plurality of through holes A are opened on the main steel frame 1 and the upper steel frame 4, a plurality of through holes A of the same size as the main steel frame 1 are opened on the lower adjustment plate 2 and the upper adjustment plate 3, and a connecting shaft B is detachably connected to the through hole A, and the length of the connecting shaft B is three times the length of the through hole A plus twice the length of the nut.

[0040] A further optimized solution is that two upper grooves are set on the top surface of the horizontal fixing frame 5, and two lower grooves with the same size as the top surface are set on the bottom surface, two groups of upper adjustment plates 3 are installed in the upper grooves, and the two groups of upper adjustment plates 3 are rotatably connected to the upper grooves through connecting shafts B14; two groups of lower adjustment plates 2 are installed in the lower grooves, and the two groups of lower adjustment plates 2 are movably connected to the upper grooves through two connecting shafts B14.

[0041] A further optimization scheme is that a convex groove is set in the longitudinal fixing frame 9, a convex sliding block 91 is installed in the convex groove, two support blocks B16 are installed at the front end of the top face of the convex sliding block 91, and the first upper support rod 81 or the second upper support rod 82 is between the two support blocks B16, and the first upper support rod 81 or the second upper support rod 82 is rotatably connected to the support block B16 through the connecting shaft E17.

[0042] A further optimization scheme is that a plurality of square grooves are arranged on both sides of the convex sliding block 91 on the surface of the longitudinal fixing frame 9, a circular hole is arranged directly below the square groove and penetrates the longitudinal fixing frame 9, a connecting shaft D18 is installed in the circular hole, the top of the connecting shaft D18 is a connecting shaft D handle 181, the longitudinal fixing frame section is a connecting shaft D smooth rod 183, and the sliding block section is a connecting shaft D outer spiral rod 182.

[0043] A further optimization scheme is that the contact side of the sliding block and the connecting shaft D18 is set as a spiral tooth surface 19, the height of the spiral tooth surface 19 is consistent with the height of the outer spiral rod 182 of the connecting shaft D, and the length of the spiral tooth surface 19 is the distance between the outermost square groove and the innermost square groove on the longitudinal fixing frame 9.

[0044] Working principle: According to the required support height, reasonably select the height of the upper steel frame 4 to ensure that the height of the legs 21 of the trolley 20, the combined height of the main steel frame 1, the transverse fixing frame 5 and the upper steel frame 4 are close to the support height; assemble the main steel frame 1, the lower adjustment plate 2, the upper adjustment plate 3, the upper steel frame 4 and the transverse fixing frame 5 into one, and then assemble the transverse fixing frame 5 and the longitudinal fixing frame 9, connect the first upper support rod 81, the second upper support rod 82, the first lower support rod 83, and the second lower support rod 84 respectively to the main steel frame 1, the upper steel frame 4, and the longitudinal fixing frame 9, and place them on the trolley 20 below the support position, and open the legs 21 of the trolley 20 to provide stability. Open the connecting shaft D18, and turn the connecting shaft D handle 181 by hand. The connecting shaft D handle 181 drives the connecting shaft D outer screw rod 182 to rotate, and the spiral tooth surface 19 is driven to move longitudinally through the connecting shaft D outer screw rod 182. The longitudinal movement of the spiral tooth surface 19 drives the convex sliding block 91 to move. The convex sliding block 91 moves through the first lower support rod 83 and the second lower support rod 84 to drive the upper steel frame 4 to move longitudinally. When the upper steel frame 4 can contact the support surface well, turn the connecting shaft D handle 181 by hand to close it to complete the temporary support work.

[0045] Example 2.

[0046] like Figure 1 , Figure 3-4 , Figure 6-13 As shown, the present invention provides a temporary support device. When the support range is large, it is necessary to adjust the height and inclination of the upper steel frame 4 and the length of the longitudinal fixing frame 9. The temporary support device includes a main steel frame 1, a lower adjustment plate 2, an upper adjustment plate 3, an upper steel frame 4, an upper steel frame A41, and an upper steel frame B42; a transverse fixing frame 5, a longitudinal fixing frame 9, a convex sliding block 91, a connecting plate 6, a connecting rod 7, a supporting rod 8, a reinforcing plate 10, a supporting block A11, a connecting shaft A12, a through hole A13, and a connecting Axis B14, connecting shaft C, supporting block B16, connecting shaft E17, connecting shaft D18, spiral tooth surface 19, trolley 20, supporting leg 21; wherein the upper steel frame 4 includes an upper steel frame A41 and an upper steel frame B42; the supporting rod 8 includes a first upper supporting rod 81, a second upper supporting rod 82, a first lower supporting rod 83, a second lower supporting rod 84, a third lower supporting rod 85, a fourth lower supporting rod 86, a third upper supporting rod 87, and a fourth upper supporting rod 88, and the fourth upper supporting rod includes a cylindrical threaded rod 881 and an inner groove threaded rod 882, the connecting shaft D18 includes a connecting shaft D handle 181, a connecting shaft D outer spiral rod 182, and a connecting shaft D smooth rod 183, the main steel frame 1 is connected to the main steel frame 1 at the upper lateral part through a connecting rod 7; the main steel frame 1 is connected to the main steel frame 1 at the lower lateral part through a connecting plate 6, the bottom end of the main steel frame 1 is connected to a trolley 20, and the two sides of the trolley 20 are legs 21, the top of the main steel frame 1 is a lateral fixing frame 5, the top of the lateral fixing frame 5 is an upper steel frame 4, and the upper steel frame 4 is connected to the upper lateral part of the upper steel frame 4 The upper steel frame 4 is connected through a connecting plate 6; the upper steel frame 4 is connected to the upper steel frame 4 at the lateral lower part by a connecting rod 7; the upper steel frame 4 is movably connected to the upper steel frame 4 at the longitudinal bottom end by a longitudinal fixing frame 9, and the upper steel frame 41 is fixedly connected to the upper steel frame 42 at the longitudinal upper end by a first upper support rod 81, a second upper support rod 82, a third upper support rod 87 and a fourth upper support rod 88, the lateral fixing frame 5 is vertically connected to the longitudinal fixing frame 9 and the longitudinal fixing frame 9 is vertically connected to the main steel frame 1, and the longitudinal fixing frame 9 is connected to the connecting plate 6 by a support rod 8.

[0047] Preferably, the bottom end of the longitudinal fixing frame 9 is symmetrically connected to the main steel frame 1 through the first lower support rod 83, the second lower support rod 84, the third lower support rod 85 and the fourth lower support rod 86, and the top end of the longitudinal fixing frame 9 is sequentially connected to the upper steel frame 4 at different heights through the first upper support rod 81, the second upper support rod 82, the third upper support rod 87 and the fourth upper support rod 88, wherein the reinforcing plate 10, the support block A11, the third lower support rod 85 and the fourth lower support rod 86 are connected in sequence. Figure 1 Not reflected in.

[0048] Preferably, the center of the connecting plate 6 is vertically provided with a reinforcing plate 10, and two supporting blocks A11 are symmetrically arranged at the center of the outer surface of the reinforcing plate 10, and the middle of the two supporting blocks A11 is rotatably connected to the supporting rod 8 via a connecting shaft A12.

[0049] Preferably, a retractable device is provided in the middle of the support rod 8, a cylindrical threaded rod 881 is provided at one end of the retractable device, and an inner groove threaded rod 882 whose outer diameter is consistent with the support rod 8 is provided at the other end, and the inner groove threaded rod 882 works in cooperation with the cylindrical threaded rod 881.

[0050] Preferably, a plurality of through holes A are provided on the main steel frame 1 and the upper steel frame 4, a plurality of through holes A of the same size as the main steel frame 1 are provided on the lower adjustment plate 2 and the upper adjustment plate 3, and a connecting shaft B is detachably connected to the through hole A, and the length of the connecting shaft B is three times the length of the through hole A plus twice the length of the nut.

[0051] Preferably, two upper grooves are set on the top surface of the horizontal fixing frame 5, and two lower grooves with the same size as the top surface are set on the bottom surface. Two groups of upper adjustment plates 3 are installed in the upper grooves, and the two groups of upper adjustment plates 3 are rotatably connected to the upper grooves through connecting shafts B14; two groups of lower adjustment plates 2 are installed in the lower grooves, and the two groups of lower adjustment plates 2 are movably connected to the upper grooves through two connecting shafts B14.

[0052] Preferably, a convex groove is provided in the longitudinal fixing frame 9, a convex sliding block 91 is installed in the convex groove, two support blocks B16 are installed at the front end of the top face of the convex sliding block 91, and the first upper support rod 81 or the second upper support rod 82 is between the two support blocks B16, and the first upper support rod 81 or the second upper support rod 82 is rotatably connected to the support block B16 through the connecting shaft E17.

[0053] Preferably, a plurality of square grooves are arranged on both sides of the convex sliding block 91 on the surface of the longitudinal fixing frame 9, a circular hole is arranged directly below the square groove and passes through the longitudinal fixing frame 9, a connecting shaft D18 is installed in the circular hole, the top of the connecting shaft D18 is a connecting shaft D handle 181, the longitudinal fixing frame section is a connecting shaft D smooth rod 183, and the sliding block section is a connecting shaft D outer spiral rod 182.

[0054] Preferably, the contact side of the sliding block with the connecting shaft D18 is set as a spiral tooth surface 19, the height of the spiral tooth surface 19 is consistent with the height of the outer spiral rod 182 of the connecting shaft D, and the length of the spiral tooth surface 19 is the distance between the outermost square groove and the innermost square groove on the longitudinal fixing frame 9.

[0055] Working principle: According to the required support height, the height of the upper steel frame 4 is reasonably selected to ensure that the height of the support legs 21 of the trolley 20, the combined height of the main steel frame 1, the transverse fixing frame 5 and the upper steel frame 4 is close to the support height and the support width meets the requirements; for the tunnel section with a curved surface, when supporting, consider using multiple upper steel frames 4 of different lengths or adjusting the angle of a certain upper steel frame 4 to meet the requirements of the curved top surface, assemble the main steel frame 1, the lower adjustment plate 2, the upper adjustment plate 3, multiple upper steel frames 4 and the transverse fixing frame 5 into one, and then assemble the transverse fixing frame 5 and the longitudinal fixing frame 9, and connect the first upper support rod 81, the second upper support rod 82, the third upper support rod 87, the fourth upper support rod 88 and the first lower support rod 83, the second lower support rod 84, the third lower support rod 85, and the fourth lower support rod 86 respectively to the main steel frame 1, the multiple upper steel frames 4, and the longitudinal fixing frame 9, and then place them on the trolley 20 below the support position, and open the support legs 21 of the trolley 20 to provide stability. Open the connecting shaft D18, and turn the connecting shaft D handle 181 by hand. The connecting shaft D handle 181 drives the connecting shaft D outer screw rod 182 to rotate, and the spiral tooth surface 19 is driven to move longitudinally through the connecting shaft D outer screw rod 182. The longitudinal movement of the spiral tooth surface 19 drives the convex sliding block 91 to move. The convex sliding block 91 moves through the first lower support rod 83 and the second lower support rod 84 to drive the upper steel frame 4 to move longitudinally. When multiple upper steel frames 4 can contact the support surface well, turn the connecting shaft D handle 181 by hand to close it to complete the temporary support work.

[0056] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A temporary support device for tunnel excavation, characterized in that: The invention comprises a main steel frame (1), a lower adjustment plate (2), an upper adjustment plate (3), an upper steel frame (4), a transverse fixing frame (5), a longitudinal fixing frame (9), a convex sliding block (91), a connecting plate (6), a connecting rod (7), a supporting rod (8), a reinforcing plate (10), a supporting block A (11), a connecting shaft A (12), a through hole A (13), a connecting shaft B (14), a connecting shaft C (15), a supporting block B (16), a connecting shaft D (18), a connecting shaft E (17), a spiral tooth surface (19), a trolley (20), and a supporting leg (21); wherein the upper steel frame (4) comprises an upper steel frame A (41), an upper steel frame B (42); the support rod (8) includes a first upper support rod (81), a second upper support rod (82), a first lower support rod (83), a second lower support rod (84), a third lower support rod (85), a fourth lower support rod (86), a third upper support rod (87), and a fourth upper support rod (88); the fourth upper support rod (88) includes a cylindrical threaded rod (881) and an inner groove threaded rod (882); the connecting shaft D (18) includes a connecting shaft D handle (181), a connecting shaft D outer spiral rod (182), and a connecting shaft D smooth rod (183); The main steel frame (1) is connected to the main steel frame (1) at its upper lateral part through a connecting rod (7); the main steel frame (1) is connected to the main steel frame (1) at its lower lateral part through a connecting plate (6); the bottom end of the main steel frame (1) is connected to a trolley (20), and the two sides of the trolley (20) are supporting legs (21); the top of the main steel frame (1) is a lateral fixing frame (5), and the top of the lateral fixing frame (5) is an upper steel frame (4); the upper steel frame (4) is connected to the upper lateral part of the upper steel frame (4) through a connecting plate (6); the upper steel frame (4) is connected to the lower lateral part of the upper steel frame (4) through a connecting rod (7); the lateral fixing frame (5) is vertically connected to the longitudinal fixing frame (9), and the longitudinal fixing frame (9) is vertically connected to the main steel frame (1), and the longitudinal fixing frame (9) is connected to the connecting plate (6) through a supporting rod (8); The bottom end of the longitudinal fixing frame (9) is symmetrically connected to the main steel frame (1) through a first lower support rod (83) and a second lower support rod (84), and the top end of the longitudinal fixing frame (9) is symmetrically connected to the upper steel frame (4) through a first upper support rod (81) and a second upper support rod (82); The center of the connecting plate (6) is a reinforcing plate (10) vertically disposed therein, and two supporting blocks A (11) are symmetrically disposed at the center of the outer surface of the reinforcing plate (10), and the middle of the two supporting blocks A (11) is rotatably connected to the supporting rod (8) via a connecting shaft A (12); A telescopic device is arranged in the middle of the support rod (8), a cylindrical threaded rod (881) is arranged at one end of the telescopic device, and an inner groove threaded rod (882) having an outer diameter consistent with that of the support rod (8) is arranged at the other end, and the inner groove threaded rod (882) cooperates with the cylindrical threaded rod (881) to work; A plurality of through holes A (13) are provided on the main steel frame (1) and the upper steel frame (4), and a plurality of through holes A (13) of the same size as the main steel frame (1) are provided on the lower adjustment plate (2) and the upper adjustment plate (3). A connecting shaft B (14) is detachably connected in the through hole A (13), and the length of the connecting shaft B (14) is three times the length of the through hole A (13) plus two times the length of the nut; The top surface of the transverse fixing frame (5) is provided with two upper grooves, and the bottom surface is provided with two lower grooves of the same size as the top surface, two groups of upper adjustment plates (3) are installed in the upper grooves, and the two groups of upper adjustment plates (3) are rotatably connected to the upper grooves through connecting shafts B (14); two groups of lower adjustment plates (2) are installed in the lower grooves, and the two groups of lower adjustment plates (2) are movably connected to the upper grooves through two connecting shafts B (14); A convex groove is arranged in the longitudinal fixing frame (9), a convex sliding block (91) is installed in the convex groove, two support blocks B (16) are installed at the front end of the top of the convex sliding block (91), a first upper support rod (81) or a second upper support rod (82) is arranged between the two support blocks B (16), and the first upper support rod (81) or the second upper support rod (82) is rotatably connected to the support block B (16) via a connecting shaft E (17); A plurality of square grooves are arranged on both sides of the convex sliding block (91) on the surface of the longitudinal fixing frame (9), a circular hole is arranged directly below the square groove and penetrates the longitudinal fixing frame (9), a connecting shaft D (18) is installed in the circular hole, a top end of the connecting shaft D (18) is a connecting shaft D handle (181), the longitudinal fixing frame section is a connecting shaft D smooth rod (183), and the sliding block section is a connecting shaft D outer spiral rod (182); The contact side of the sliding block with the connecting shaft D (18) is set as a spiral tooth surface (19), the height of the spiral tooth surface (19) is consistent with the height of the outer spiral rod (182) of the connecting shaft D, and the length of the spiral tooth surface (19) is the distance between the outermost square groove and the innermost square groove on the longitudinal fixing frame (9).

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