Nonlinear continuous yielding integrated steel arch

Abstract

The application discloses a nonlinear continuous yielding integrated steel arch, which is composed of a plurality of steel arch assemblies, and two adjacent steel arch assemblies are connected through a nonlinear continuous yielding device; the upper assembly of the nonlinear continuous yielding device comprises a sleeve, a connecting rod and a truncated cone end head, the connecting rod is installed on an upper end plate and located in the sleeve, and the truncated cone end head is connected with the lower end of the connecting rod; the lower assembly of the nonlinear continuous yielding device comprises a lower end plate and a nonlinear continuous yielding damper, a plurality of through holes are formed in the lower end plate, one nonlinear continuous yielding damper is installed in each through hole, and the connecting rod and the truncated cone end head are both installed in the nonlinear continuous yielding damper. The application has the advantages that the truncated cone end head extrudes and rubs the truncated cone wall of the nonlinear continuous yielding damper, nonlinear continuous yielding deformation is realized, continuous large deformation of different surrounding rocks is adaptively achieved, the safety of the steel arch and the tunnel is protected, the integrated steel arch is fast to assemble, the supporting efficiency is high, and the construction time and cost are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel efficient support and soft rock large deformation control, and particularly relates to a nonlinear continuous yielding integrated steel arch. BACKGROUND

[0002] In tunnel excavation, when the tunnel passes through a fault fracture zone or soft surrounding rock and the like, the problem of large deformation of the surrounding rock caused by extrusion may occur. The pressure of the surrounding rock caused by large deformation may cause serious damage to the support in the tunnel, affect the construction progress, and even cause the destruction of the tunnel and threaten the safety of the construction personnel.

[0003] Existing research shows that yielding support is an effective technical measure to deal with the problem of large deformation of the surrounding rock caused by extrusion. In the prior art, the steel arch device for inhibiting large deformation of a tunnel disclosed in Patent No. CN214997711 U sets an adapter device between the steel arches, and the adapter device is composed of a box body, a top plate, a yielding rod, a steel arch adapter plate and a spring. A plurality of yielding rods are arranged on the top plate at both ends of the box body, the spring is nested on the yielding rod, one end of the spring is connected with the yielding rod, and the other end of the spring is connected with the top plate. The deformation of the adapter device is used to replace the deformation of the steel arch, so as to reduce the stress on the steel arch and protect the steel arch. The steel arch connecting component for plug-in type spherical hinge type quantifiable yielding and the use method disclosed in Patent No. ZL 201910995638.6 set a connecting component between two steel arches, and the connecting component includes a connecting rod and a sleeve. The connecting rod includes a spherical end head at one end, a threaded end head at the other end and a rod body in the middle. The sleeve is a cylindrical structure with one end closed and the other end open. An internal thread part is arranged on the inner wall of the sleeve near the closed end, and a one-way clamping part is arranged on the inner wall of the open end of the sleeve. The connecting rod is inserted into the sleeve, the internal thread of the sleeve body is in extrusion shear with the spherical end head to generate resistance, and the yielding deformation is achieved. However, the prior art has the following problems: (1) In fact, different geological conditions are different, and the deformation of the surrounding rock is also different. The steel arch lacks a setting for self-adapting to different surrounding rocks; (2) The large deformation of the surrounding rock is in multiple stages. The steel arch lacks a real-time self-adjusting setting for matching the yielding deformation of the surrounding rock in each stage; (3) The traditional yielding connecting rod is not firmly connected with the steel arch, and cannot effectively ensure the stability of the steel arch; and (4) The yielding device is arranged between the steel arches, and the yielding deformation amount is limited. SUMMARY

[0004] The present application aims at the above-mentioned problems in the prior art, and provides a nonlinear continuous yielding integrated steel arch. The steel arch is composed of a plurality of steel arch assemblies, and two adjacent steel arch assemblies are connected through a nonlinear continuous yielding device. The nonlinear continuous yielding device is composed of a nonlinear continuous yielding device upper assembly and a nonlinear continuous yielding device lower assembly which cooperate with each other. The nonlinear continuous yielding device upper assembly is connected with the nonlinear continuous yielding device lower assembly through the cooperation between the truncated cone end head of the nonlinear continuous yielding device upper assembly and the nonlinear continuous yielding damper of the nonlinear continuous yielding device lower assembly, so as to realize nonlinear continuous yielding deformation.

[0005] The objective of this invention is achieved through the following technical solutions:

[0006] A nonlinear continuous pressure-relief integrated steel arch frame is disclosed, comprising multiple steel arch frame components, each an I-beam structure. Adjacent steel arch frame components are connected by a nonlinear continuous pressure-relief device, which is designated as an upper and lower steel arch frame component, respectively. The nonlinear continuous pressure-relief device consists of a cooperating upper and lower component, respectively mounted on the upper and lower steel arch frame components. The upper component includes a sleeve, a connecting rod, and a truncated conical end. The structure comprises an end plate and four side plates, forming a rectangular structure with a top cover. Multiple connecting rods are provided, mounted on the upper end plate and located within the sleeve. The truncated conical end is connected to the lower end of the connecting rod, and the outer diameter of the truncated conical end gradually decreases from top to bottom. The lower component of the nonlinear continuous pressure relief device includes a lower end plate and a nonlinear continuous pressure relief damper. The lower end plate is mounted on the lower steel arch frame assembly. Multiple through holes are provided on the lower end plate, and one nonlinear continuous pressure relief damper is installed in each through hole. Both the lower component of the nonlinear continuous pressure relief device and the lower steel arch frame assembly are installed within the sleeve. The connecting rod and the truncated conical end are both installed within the nonlinear continuous pressure relief damper.

[0007] The nonlinear continuous pressure damper includes a damping cylinder and a bottom sealing plate. The damping cylinder has a truncated conical wall inside, and the inner diameter of the truncated conical wall gradually decreases from top to bottom. The bottom sealing plate is located at the bottom end of the damping cylinder and is used to seal the bottom end of the damping cylinder.

[0008] The damping cylinder is equipped with a one-way snap-fit ​​buckle at the top.

[0009] The one-way latch is composed of multiple arc-shaped rotating plates, which are arranged circumferentially along the inner end of the damping cylinder opening. The outer side of each arc-shaped rotating plate is connected to the damping cylinder through a rotatable component, and the inner sides of the multiple arc-shaped rotating plates form a hole that allows the connecting rod to pass through.

[0010] The inner wall of the side plate of the sleeve facing the wing plate of the steel arch frame assembly is provided with multiple parallel sliding grooves, and multiple self-rotating ball bearings are spaced apart in the sliding grooves.

[0011] The position and number of the truncated conical ends of the upper component of the nonlinear continuous pressure relief device correspond to the position and number of the nonlinear continuous pressure relief dampers of the lower component of the nonlinear continuous pressure relief device.

[0012] The truncated cone end of the upper nonlinear continuous yielding device assembly and the nonlinear continuous yielding damper of the lower nonlinear continuous yielding device assembly are arranged in an array, and the number of the truncated cone ends is evenly distributed on both sides of the web of the upper steel arch assembly, and the number of the nonlinear continuous yielding dampers is evenly distributed on both sides of the web of the lower steel arch assembly.

[0013] The advantages of the present application are:

[0014] (1) The truncated cone wall of the truncated cone end extrusion friction nonlinear continuous yielding damper realizes nonlinear continuous yielding deformation;

[0015] (2) The truncated cone wall can adapt to different surrounding rocks according to different geological conditions or surrounding rock deformation, and protect the steel arch;

[0016] (3) When the surrounding rock pressure or deformation is large, the nonlinear continuous yielding device can reduce the deformation of the steel arch itself and prevent the steel arch from being twisted and crushed;

[0017] (4) The nonlinear continuous yielding device is integrally arranged with the steel arch, which can realize rapid connection between the steel arches, the formed steel arch is firm and reliable, the initial support construction efficiency is accelerated, the support opportunity is ensured, the tunnel deformation is effectively controlled, and the safety of tunnel construction is ensured;

[0018] (5) The steel arch is inserted into the sleeve and the plurality of connecting rods are inserted into the damping cylinder, which not only can guide the deformation direction of the steel arch, but also can increase the overall stability between the steel arch and the yielding device, and when the yielding device deforms, the friction between the sleeve and the steel arch can be reduced through the balls arranged on the side plate of the sleeve;

[0019] (6) The nonlinear continuous yielding damper is arranged below the lower end plate of the steel arch, and when the nonlinear continuous yielding damper deforms to the limit, the upper end plate and the lower end plate of the steel arch can be completely attached, the small space between the steel arches can be fully utilized, the deformation amount of the steel arch can be increased, and the stability of the steel arch can be enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the steel arch of the present application;

[0021] Figure 2 is Figure 1 is a sectional view of A-A in FIG. 4;

[0022] Figure 3 is a schematic view of the nonlinear continuous yielding device of the present application;

[0023] Figure 4 is a sectional view of the upper assembly of the nonlinear continuous yielding device of the present application;

[0024] Figure 5 for Figure 4 Cross-sectional view of the middle section (BB);

[0025] Figure 6 This is a schematic cross-sectional view of the lower component of the nonlinear continuous pressure relief device of the present invention;

[0026] Figure 7 for Figure 6 Enlarged view of b in the middle;

[0027] like Figures 1-7 As shown in the figure, the labels represent:

[0028] a. Steel arch frame;

[0029] 1. Nonlinear continuous pressure relief device; 2. Steel arch frame assembly;

[0030] 11. Upper component of the nonlinear continuous pressure relief device; 12. Lower component of the nonlinear continuous pressure relief device;

[0031] 111. Sleeve, 112. Upper end plate, 113. Side plate, 114. Connecting rod, 115. Frustum of a conical end, 116. Slide groove, 117. Ball bearing;

[0032] 121. Lower end plate; 122. Through hole; 123. Nonlinear continuous pressure damper; 124. Damping cylinder; 125. Bottom-sealed end plate; 126. Truncated conical wall; 127. One-way snap-fit.

[0033] 21. Upper steel arch frame assembly; 22. Lower steel arch frame assembly. Detailed Implementation

[0034] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art:

[0035] Example: Figures 1-7 As shown, this embodiment relates to a nonlinear continuous pressure relief integrated steel arch frame. The steel arch frame a is composed of multiple steel arch frame components 2. The steel arch frame components 2 are I-beam structures. Adjacent steel arch frame components 2 are connected by a nonlinear continuous pressure relief device 1. The two adjacent steel arch frame components 2 are the upper steel arch frame component 21 and the lower steel arch frame component 22, respectively.

[0036] like Figures 1-7 As shown, the nonlinear continuous pressure relief device 1 consists of an upper component 11 and a lower component 12 that cooperate with each other. The upper component 11 and the lower component 12 are respectively installed on the upper steel arch frame component 21 and the lower steel arch frame component 22 by welding.

[0037] The upper assembly 11 of the nonlinear continuous yielding device comprises a sleeve 111, connecting rods 114 and truncated cone end heads 115. The sleeve 111 is a rectangular structure with a cover assembled by an upper end plate 112 and four side plates 113. The inner walls of the two side plates 113 of the sleeve 111 facing the wing plates of the steel arch assembly 2 are provided with a plurality of parallel sliding grooves 116. A plurality of rotatable balls 117 are arranged in the sliding grooves 116 at intervals. The balls 117 cannot move in the vertical direction of the sliding grooves 116, but can rotate. The sleeve 111 is connected to the upper steel arch assembly 21 through the upper end plate 112. Four connecting rods 114 are arranged in an array. The connecting rods 114 are installed on the upper end plate 112 and located in the sleeve 111. The truncated cone end heads 115 are connected to the lower ends of the connecting rods 114. The outer diameters of the truncated cone end heads 115 gradually decrease from top to bottom. The four truncated cone end heads 115 are located on both sides of the web plate of the upper steel arch assembly 21 respectively.

[0038] The lower assembly 12 of the nonlinear continuous yielding device comprises a lower end plate 121 and nonlinear continuous yielding dampers 123, the lower end plate 121 is installed on the lower steel arch assembly 22, the cross-sectional size of the lower assembly 12 (the lower end plate 121) of the nonlinear continuous yielding device, the cross-sectional size of the lower steel arch assembly 22 and the cross-sectional size inside the sleeve 111 correspond to each other, the lower assembly 12 of the nonlinear continuous yielding device and the lower steel arch assembly 22 are both installed inside the sleeve 111 and move along the extension direction inside the sleeve 111, four through holes 122 are formed on the lower end plate 121, one nonlinear continuous yielding damper 123 is welded or threadedly connected and installed in each through hole 122, the positions and numbers of the truncated conical end heads 115 of the upper assembly 11 of the nonlinear continuous yielding device correspond to the positions and numbers of the nonlinear continuous yielding dampers 123 of the lower assembly 12 of the nonlinear continuous yielding device respectively, and the four nonlinear continuous yielding dampers 123 are located on both sides of the web of the lower steel arch assembly 22 respectively. The nonlinear continuous yielding damper 123 comprises a damping cylinder 124 and a bottom sealing plate 125, the damping cylinder 124 is internally provided with a truncated conical wall 126, the inner diameter of the truncated conical wall 126 gradually decreases from top to bottom, the bottom sealing plate 125 is arranged at the bottom end of the damping cylinder 124 and is used for sealing the bottom end of the damping cylinder 124, and the connecting rod 114 and the truncated conical end head 115 are both installed in the damping cylinder 124 of the nonlinear continuous yielding damper 123. In addition, the top of the damping cylinder 124 is provided with a one-way clamping buckle 127, the one-way clamping buckle 127 can limit the truncated conical end head 115 and prevent the truncated conical end head 115 from moving out of the damping cylinder 124, the one-way clamping buckle 127 is composed of a plurality of arc-shaped rotating plates, and the arc-shaped rotating plates are arranged along the inner periphery of the opening end of the damping cylinder 124, in the embodiment, four arc-shaped rotating plates are arranged, the outer side of each arc-shaped rotating plate is connected to the damping cylinder 124 through a rotatable piece (a torsional spring can be selected), and a hole through which the connecting rod 114 passes is formed between the inner sides of the four arc-shaped rotating plates. Under normal conditions, the arc-shaped rotating plates are in a horizontal state, when the arc-shaped rotating plates are subjected to a downward force, the arc-shaped rotating plates rotate downward, when the downward force disappears, the arc-shaped rotating plates rotate back to the horizontal state, and when the arc-shaped rotating plates are subjected to an upward force, the arc-shaped rotating plates remain in the horizontal state and do not rotate upward.

[0039] As Figures 1-7 shown, the working method of the nonlinear continuous yielding device 1 is as follows:

[0040] When the truncated cone end head 115 presses the one-way snap buckle 127 downward, the arc-shaped rotating plate rotates downward, so that the truncated cone end head 115 enters the damping cylinder 124, and when the truncated cone end head 115 completely enters the damping cylinder 124, the arc-shaped rotating plate rotates to a horizontal state, the connecting rod 114 is located in the hole formed between the inner sides of the arc-shaped rotating plate, the one-way snap buckle 127 can limit the truncated cone end head 115 from separating from the damping cylinder 124, and the hole formed between the inner sides of the arc-shaped rotating plate guides the connecting rod 114. The truncated cone end head 115 presses and rubs the truncated cone wall 126 of the nonlinear continuous yielding damper 123, and nonlinear continuous yielding deformation is realized. When the nonlinear continuous yielding damper 123 deforms to the limit, the upper end plate 112 and the lower end plate 121 can be completely attached, the small space between the steel arches a can be fully utilized, the deformation amount of the steel arches a is increased, and the stability of the steel arches a is enhanced. In this process, the friction between the sleeve 111 and the lower steel arch assembly 22 can be reduced by the balls 117 arranged on the side plate 113 of the sleeve 111.

[0041] The beneficial technical effects of the embodiment are:

[0042] (1) The truncated cone end head presses and rubs the truncated cone wall of the nonlinear continuous yielding damper, and nonlinear continuous yielding deformation is realized.

[0043] (2) The truncated cone wall can adapt to different surrounding rocks according to different geological conditions or surrounding rock deformation, and protect the steel arches.

[0044] (3) When the surrounding rock pressure or deformation is large, the nonlinear continuous yielding device can reduce the deformation of the steel arches and prevent the steel arches from being twisted and crushed.

[0045] (4) The nonlinear continuous yielding device is integrally arranged with the steel arches, can realize rapid connection between the steel arches, the formed steel arches are firm and reliable, the initial support construction efficiency is improved, the support opportunity is ensured, the tunnel deformation is effectively controlled, and the safety of tunnel construction is ensured.

[0046] (5) The steel arches are inserted into the sleeve, and the connecting rods are inserted into the damping cylinder, which can guide the deformation direction of the steel arches, increase the overall stability between the steel arches and the yielding device, and reduce the friction between the sleeve and the steel arches by the balls arranged on the side plate of the sleeve when the yielding device deforms.

[0047] (6) The nonlinear continuous yielding damper is arranged below the lower end plate of the steel arches, the upper end plate and the lower end plate of the steel arches can be completely attached when the nonlinear continuous yielding damper deforms to the limit, the small space between the steel arches can be fully utilized, the deformation amount of the steel arches is increased, and the stability of the steel arches is enhanced.

[0048] Although the above embodiments have been described with reference to the accompanying drawings, it is to be understood that the present application is not limited to the embodiments disclosed herein, but that various modifications and changes can be made thereto without departing from the scope of the application as set forth in the claims.

Claims

1. A nonlinear continuous yield integrated steel arch, characterized in that: The steel arch frame is composed of a plurality of steel arch frame assemblies, the steel arch frame assembly is an I-shaped steel structure, two adjacent steel arch frame assemblies are connected through a nonlinear continuous yielding device, the two adjacent steel arch frame assemblies are an upper steel arch frame assembly and a lower steel arch frame assembly, the nonlinear continuous yielding device is composed of a nonlinear continuous yielding device upper assembly and a nonlinear continuous yielding device lower assembly matched with each other, the nonlinear continuous yielding device upper assembly and the nonlinear continuous yielding device lower assembly are respectively installed on the upper steel arch frame assembly and the lower steel arch frame assembly; the nonlinear continuous yielding device upper assembly comprises a sleeve, a connecting rod and a truncated cone end, the sleeve is an upper covered rectangular structure assembled by an upper end plate and four side plates, a plurality of connecting rods are arranged, the connecting rods are installed on the upper end plate and located in the sleeve, the truncated cone end is connected with the lower end of the connecting rod, the outer diameter of the truncated cone end gradually decreases from top to bottom, the nonlinear continuous yielding device lower assembly comprises a lower end plate and a nonlinear continuous yielding damper, the lower end plate is installed on the lower steel arch frame assembly, a plurality of through holes are formed in the lower end plate, and one nonlinear continuous yielding damper is installed in each through hole, the nonlinear continuous yielding device lower assembly and the lower steel arch frame assembly are installed in the sleeve, and the connecting rod and the truncated cone end are installed in the nonlinear continuous yielding damper.

2. The nonlinear continuous yield integrated steel arch as claimed in claim 1, wherein: The nonlinear continuous yielding damper comprises a damping cylinder and a bottom sealing end plate, a truncated cone wall is arranged in the damping cylinder, and the inner diameter of the truncated cone wall gradually decreases from top to bottom, and the bottom sealing end plate is arranged at the bottom end of the damping cylinder and used for sealing the bottom end of the damping cylinder.

3. The nonlinear continuous yield integrated steel arch as claimed in claim 2, wherein: The top of the damping cylinder is provided with a one-way clamping buckle.

4. The nonlinear continuous yield integrated steel arch as claimed in claim 3, wherein: The one-way clamping buckle is composed of a plurality of arc-shaped rotating plates, the arc-shaped rotating plates are arranged along the inner circumferential surface of the opening end of the damping cylinder, the outer side of each arc-shaped rotating plate is connected with the damping cylinder through a rotatable piece, and a hole allowing the connecting rod to pass through is formed between the inner sides of the arc-shaped rotating plates.

5. The nonlinear continuous yield integrated steel arch as claimed in claim 1, wherein: The inner walls of the side plates of the sleeve facing the steel arch frame assemblies are provided with a plurality of parallel sliding grooves, and a plurality of self-rotating balls are arranged in the sliding grooves at intervals.

6. The nonlinear continuous yield integrated steel arch of claim 1, wherein: The positions and numbers of the truncated cone ends of the nonlinear continuous yielding device upper assembly correspond to the positions and numbers of the nonlinear continuous yielding dampers of the nonlinear continuous yielding device lower assembly.

7. The nonlinear continuous yield integrated steel arch as claimed in claim 6, wherein: The truncated cone ends of the nonlinear continuous yielding device upper assembly and the nonlinear continuous yielding dampers of the nonlinear continuous yielding device lower assembly are arranged in an array, and the truncated cone ends are evenly arranged on both sides of the web of the upper steel arch frame assembly, and the nonlinear continuous yielding dampers are evenly arranged on both sides of the web of the lower steel arch frame assembly.

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