Temporary supporting structure for underground excavation tunnel

Abstract

The utility model relates to the technical field of tunnel construction, and discloses a temporary support structure for subsurface excavation of a tunnel, which comprises a support column, a chassis, a top column top plate and an attached plate, the chassis is arranged at the bottom end of the support column, and the upper surface of the chassis is fixedly connected with a top pile. According to the temporary supporting structure for the subsurface tunnel, the supporting columns are matched with the bottom holes and the top piles of the chassis in an inserted mode, so that rapid positioning and anti-overturning stability of the foundation structure are achieved; the height of the jacking column is adjusted through threads of the internal thread cylinder, different tunnel section supporting requirements are met, the handle provides a manual screwing operation fulcrum, and the adjusting process is simplified; the top plate and the attached plate form an extensible connecting structure through the first edge groove, the second edge groove and the link block, transverse fine adjustment is allowed, and rock stratum pressure is dispersed. The sliding groove of the attached plate is combined with the clamping block and the thread adjusting assembly of the first supporting rod and the second supporting rod, multi-stage height compensation and settlement adaptation are achieved, and the limiting clamping groove limits the axial stress direction of the supporting rod assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, concretely is a kind of temporary support structure for cut-and-cover tunnel. BACKGROUND

[0002] In cut-and-cover tunnel construction, temporary support structure is the core measure to ensure construction safety and surrounding rock stability.

[0003] Traditional support technology relies on manual binding of steel mesh, erecting steel arch or spraying concrete process, and the following problems exist: low installation efficiency, the existing technology needs to mark, drill and fix expansion bolts on the top of tunnel, and then form a net-shaped support structure by steel binding, which is complicated and relies on a large number of manual operations, and takes a long time of several hours or even several days; Poor adaptability, the size of tunnel section often fluctuates due to construction errors or changes in geological conditions, and traditional steel arch or support structure needs to be customized in different specifications, resulting in material waste and increased construction cost; Insufficient dynamic compensation, in soft soil or broken rock layer, surrounding rock is prone to settlement or deformation, and existing support structure lacks multi-level height adjustment and settlement compensation mechanism, which easily leads to support failure or structural instability; Safety hazards, traditional support lacks active protection for falling objects, such as tools, soil blocks, etc., which easily fall into the construction area, threatening personnel safety.

[0004] Therefore, it is necessary to provide a temporary support structure for cut-and-cover tunnel. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies of the prior art, the utility model provides a temporary support structure for cut-and-cover tunnel, which has the advantages of quick positioning and anti-overturning design and multi-level height adjustment, solving the problems raised in the background art.

[0006] The utility model provides the following technical scheme: a temporary support structure for cut-and-cover tunnel, comprising a support column, a chassis, a top column top plate and an attached plate, the chassis is arranged at the bottom end of the support column, the upper surface of the chassis is fixedly connected with a top pile, the bottom end of the support column is provided with a bottom hole, the top pile is inserted into the inside of the bottom hole, the top end of the support column is rotatably connected with an internal thread cylinder, the top column is slidingly inserted into the inside of the support column, the top plate is fixedly connected at the top end of the top column by bolts, and the attached plate is arranged on the side surface of the top plate.

[0007] Preferably, the four side surfaces of the top plate are provided with edge grooves one, the two ends of the attached plate are provided with edge grooves two, the inside of the edge groove one is inserted with a link block, the other end of the link block is slidingly inserted into the inside of the edge groove two, and the link block is fixedly connected with the top plate and the attached plate by bolts respectively.

[0008] Preferably, the lower surface of the auxiliary plate is provided with a sliding groove, the sliding groove is slidably connected with a clamping block, the bottom end of the clamping block is rotationally connected with a second supporting rod, the bottom end of the second supporting rod is threadedly connected with an internally-threaded adjusting cylinder, and the bottom end of the internally-threaded adjusting cylinder is threadedly connected with a first supporting rod.

[0009] Preferably, the side surface of the top column is provided with a plurality of limiting clamping grooves, and the limiting clamping grooves are matched with the model specifications of the bottom end of the first supporting rod.

[0010] Preferably, the internally-threaded cylinder is threadedly connected to the surface of the top column, and the side surface of the internally-threaded cylinder is fixedly connected with a handle.

[0011] Preferably, the bottom end of the supporting column is fixedly connected with a plurality of convex heads, the surface of the bottom disc is provided with a plurality of limiting grooves, the convex heads are inserted into the limiting grooves, and the bottom end of the bottom disc is fixedly connected with a ground pile.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The temporary support structure for the open-cut tunnel is characterized in that the supporting column is inserted into the bottom hole of the bottom disc and the top pile to realize rapid positioning and anti-overturning stability of the foundation structure; the height of the top column is adjusted by the internally-threaded cylinder, different tunnel section support requirements are adapted, the handle provides a manual screwing operation fulcrum, and the adjustment process is simplified; the top plate and the auxiliary plate form an expandable connection structure through the side groove one, the side groove two and the link block, transverse fine adjustment is allowed, and rock layer pressure is dispersed; the sliding groove of the auxiliary plate is combined with the clamping block, the first supporting rod and the second supporting rod to realize multi-stage height compensation and settlement adaptation, and the limiting clamping groove limits the axial stress direction of the supporting rod assembly; the convex heads at the bottom end of the supporting column are inserted into the limiting grooves of the bottom disc to prevent sliding, and the ground pile further diffuses the load to the deep foundation, thereby improving the anti-settlement and anti-deformation capabilities of the support structure as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor.

[0015] Figure 1 It is the whole structure schematic diagram of the utility model device;

[0016] Figure 2 It is the top plate structure schematic diagram of the utility model;

[0017] Figure 3 It is the bottom disc structure schematic diagram of the utility model;

[0018] Figure 4 is a schematic view of the attached plate structure of the utility model;

[0019] Figure 5 is a schematic view of the internal thread adjusting cylinder structure of the utility model.

[0020] In the drawings, the components represented by each reference numeral are listed as follows:

[0021] 100, support column; 101, bottom hole; 102, convex head; 103, internal thread cylinder; 104, handle;

[0022] 200, base plate; 201, top pile; 202, limiting groove; 203, ground pile;

[0023] 300, top column; 301, limiting clamping groove;

[0024] 400, top plate; 401, side groove one;

[0025] 500, attached plate; 501, side groove two; 502, sliding groove;

[0026] 600, internal thread adjusting cylinder; 601, brace one; 602, brace two; 603, clamping block;

[0027] 700, linking block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] Refer to Figures 1-5As shown, a temporary support structure for tunneling, comprising a support column 100, a base plate 200, a top column 300, a top plate 400 and an auxiliary plate 500, the base plate 200 is arranged at the bottom end of the support column 100, the upper surface of the base plate 200 is fixedly connected with a top pile 201, the bottom end of the support column 100 is provided with a bottom hole 101, the top pile 201 is inserted into the inside of the bottom hole 101, the top end of the support column 100 is rotatably connected with an internal thread cylinder 103, the top column 300 is slidingly inserted into the inside of the support column 100, the top plate 400 is fixedly connected with the top end of the top column 300 through bolts, and the auxiliary plate 500 is arranged on the side surface of the top plate 400. The support column 100 and the base plate 200 are inserted and matched through the bottom hole 101 and the top pile 201, vertical direction rapid positioning is realized, and the stability of the foundation structure is enhanced; the height of the top column 300 is adjusted through the internal thread cylinder 103, different tunnel section support requirements are adapted, and the construction flexibility is improved; the top plate 400 and the auxiliary plate 500 are connected through bolts, which is convenient for disassembly and maintenance, disperses the rock layer pressure to the support system at the same time, and reduces the risk of local deformation.

[0030] Further preferably, four side surfaces of the top plate 400 are provided with side grooves one 401, two ends of the auxiliary plate 500 are provided with side grooves two 501, the inside of the side groove one 401 is inserted with a link block 700, the other end of the link block 700 is slidingly inserted into the inside of the side groove two 501, and the link block 700 is fixedly connected with the top plate 400 and the auxiliary plate 500 through bolts respectively. The side groove one 401 on the four side surfaces of the top plate 400 and the side groove two 501 of the auxiliary plate 500 are inserted through the link block 700, forming an expandable connection structure, adapting to the support requirements of irregular contours of the tunnel; the bidirectional sliding insertion mode of the link block 700 allows the auxiliary plate 500 to be adjusted horizontally, reducing the influence of installation errors on the support tightness.

[0031] Further preferably, the lower surface of the auxiliary plate 500 is provided with a sliding groove 502, the inside of the sliding groove 502 is slidingly connected with a clamping block 603, the bottom end of the clamping block 603 is rotatably connected with a support rod two 602, the bottom end of the support rod two 602 is threadedly sleeved with an internal thread adjusting cylinder 600, and the bottom end of the internal thread adjusting cylinder 600 is threadedly inserted with a support rod one 601. The sliding groove 502 of the auxiliary plate 500 is slidingly matched with the clamping block 603, combined with the screw adjusting structure of the support rod two 602 and the support rod one 601, multi-stage height compensation is realized, and the adaptability to complex geological subsidence is enhanced; the bidirectional rotation design of the internal thread adjusting cylinder 600 supports the quick locking and loosening of the support rod assembly, and improves the on-site operation efficiency.

[0032] Further preferably, the side surface of the top column 300 is provided with a plurality of limiting clamping grooves 301, and the limiting clamping grooves 301 are matched with the model specifications of the bottom end of the support rod one 601. The limiting clamping grooves 301 on the side surface of the top column 300 are embedded with the bottom end of the support rod one 601, limiting the horizontal deviation of the support rod assembly, ensuring the accurate transmission of the additional support force along the axial direction, and preventing the instability of the support structure.

[0033] Further preferably, the inner threaded cylinder 103 is threadedly sleeved on the surface of the jacking column 300, and the side surface of the inner threaded cylinder 103 is fixedly connected with the handle 104. The outer handle 104 of the inner threaded cylinder 103 provides a manual screwing operation fulcrum, and the height adjustment of the jacking column 300 can be completed without additional tools, thereby simplifying the construction process; the handle 104 is designed in an integrated manner with the inner threaded cylinder 103, the rotation torque transmission efficiency is enhanced, and the adjustment reliability is improved.

[0034] Further preferably, the bottom end of the support column 100 is fixedly connected with a plurality of protruding heads 102, the surface of the bottom disc 200 is provided with a plurality of limiting grooves 202, the protruding heads 102 are inserted into the limiting grooves 202, and the bottom end of the bottom disc 200 is fixedly connected with a ground pile 203. The protruding heads 102 at the bottom end of the support column 100 are inserted into the limiting grooves 202 of the bottom disc 200, so that the bottom disc 200 is prevented from slipping after being pressed, and the foundation overturning resistance is improved; the fixed connection of the ground pile 203 and the bottom disc 200 further spreads the support load to the deep foundation, and the overall settlement resistance is improved.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood in a broad sense, for example, can be fixed connection, or can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the specific meaning of the above terms in the present application can be understood according to the specific circumstances by those skilled in the art.

[0037] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A temporary support structure for a tunneling operation, comprising a support column (100), a base plate (200), a top column (300), a top plate (400) and an attachment plate (500), characterized in that: The bottom disc (200) is arranged at the bottom end of the support column (100), the upper surface of the bottom disc (200) is fixedly connected with a top pile (201), the bottom end of the support column (100) is provided with a bottom hole (101), the top pile (201) is inserted into the inside of the bottom hole (101), the top end of the support column (100) is rotatably connected with an internal thread cylinder (103), the top column (300) is slidingly inserted into the inside of the support column (100), the top plate (400) is fixedly connected at the top end of the top column (300) through bolts, and the auxiliary plate (500) is arranged at the side of the top plate (400).

2. A temporary support structure for use in the excavation of a tunnel according to claim 1 wherein: The four side surfaces of the top plate (400) are provided with side grooves one (401), the two ends of the auxiliary plate (500) are provided with side grooves two (501), the inside of the side groove one (401) is inserted with a link block (700), the other end of the link block (700) is slidingly inserted into the inside of the side groove two (501), and the link block (700) is fixedly connected with the top plate (400) and the auxiliary plate (500) through bolts.

3. A temporary support structure for use in the excavation of a tunnel according to claim 1 wherein: The lower surface of the auxiliary plate (500) is provided with a sliding groove (502), the inside of the sliding groove (502) is slidingly connected with a clamping block (603), the bottom end of the clamping block (603) is rotatably connected with a supporting rod two (602), the bottom end of the supporting rod two (602) is threadedly sleeved with an internal thread adjusting cylinder (600), and the bottom end of the internal thread adjusting cylinder (600) is threadedly inserted with a supporting rod one (601).

4. A temporary support structure for use in the excavation of a tunnel according to claim 3 wherein: The side surface of the top column (300) is provided with a plurality of limiting clamping grooves (301), and the limiting clamping grooves (301) are matched with the type and size of the bottom end of the supporting rod one (601).

5. A temporary support structure for use in the excavation of a tunnel according to claim 1 wherein: The internal thread cylinder (103) is threadedly sleeved on the surface of the top column (300), and the side surface of the internal thread cylinder (103) is fixedly connected with a handle (104).

6. A temporary support structure for use in the excavation of a tunnel according to claim 1, wherein: The bottom end of the support column (100) is fixedly connected with a plurality of convex heads (102), the surface of the bottom disc (200) is provided with a plurality of limiting grooves (202), the convex heads (102) are inserted into the inside of the limiting grooves (202), and the bottom end of the bottom disc (200) is fixedly connected with a ground pile (203).

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