Continuous variable-section secondary lining trolley

Abstract

The continuous variable-section secondary lining trolley comprises a trolley supporting base, a main arch frame, a plurality of supporting devices and a secondary lining inner formwork, each supporting device comprises a hydraulic cylinder and a supporting wheel set which is arranged at the telescopic end of the hydraulic cylinder and can rotate along the telescopic end of the hydraulic cylinder, and the supporting wheel sets are used for supporting the secondary lining inner formwork; the shape of the supporting structure of the whole trolley can be changed by changing the length of the hydraulic cylinder, and the curvature of the secondary lining inner template can be changed by matching with the flexibility characteristic of the steel plate rubber composite flexible secondary lining inner template; the change of the geometric dimension of the secondary lining inner template can be realized through the mechanical connection of the steel plate rubber composite flexible secondary lining inner template, and the steel plate rubber composite flexible secondary lining inner template and the secondary lining end face sealing plate are fixed through the fixing bolt at the top end of the piston rod, so that the traditional mode of replacing and fixing the secondary lining template is overcome; the variable cross section is not fixed in size and shape any more, and can cover all areas of cross section changes caused by changes of the hydraulic cylinder.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction equipment, in particular to a secondary lining trolley with a continuously variable cross-section. Background Art

[0002] During the tunnel construction process, the lining trolley (hereinafter referred to as the trolley) is an important engineering machinery and equipment. The tunnel lining trolley is a special equipment that must be used in the secondary lining (hereinafter referred to as the second lining) during the tunnel construction process. Tunnel lining trolleys mainly include simple lining trolleys, fully hydraulic automatic walking lining trolleys and grid lining trolleys. The fully hydraulic lining trolley can be divided into side top arch type, full circle needle beam type, bottom mold needle beam type, full circle walking type, etc. It has a very wide range of applications and is suitable for various tunnel construction forms.

[0003] Most of the existing secondary lining trolleys are designed as integral steel formwork. This type of design determines that the integral steel formwork of the trolley is determined to adapt to a certain tunnel section during manufacturing, with a one-to-one correspondence.

[0004] There are more and more requirements for variable cross-sections in the current tunnel design. Since integral steel formwork is used, the current mainstream solution is to replace the integral steel formwork on the basis of the original trolley body, and at the same time replace the connecting parts between the steel formwork and the trolley body as a whole. In this way, the purpose of variable cross-section can be achieved on the basis of the original trolley.

[0005] However, the current solutions have some weaknesses of their own. For example, the way of replacing steel formworks and connectors has space limitations when carrying out replacement work in the tunnel, and there are problems with lifting, etc. The work of changing cross-sections can only be carried out outside the tunnel. There are some difficulties that are difficult to overcome for construction sites that are mostly in the field environment. At the same time, the time cost of entering and exiting the tunnel is also a major problem. Summary of the invention

[0006] The purpose of the present invention is to provide a secondary lining trolley with a continuously variable cross-section to solve the problems existing in the above-mentioned prior art. A combination of a retractable hydraulic cylinder and a flexible steel plate rubber composite flexible secondary lining inner template is adopted to achieve a continuously variable cross-section, overcoming the traditional method of replacing the fixed secondary lining template. The changeable cross-section is no longer a fixed size and shape, and can cover all areas of cross-section changes brought about by changes in the hydraulic cylinder.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] A continuously variable cross-section secondary lining trolley comprises a trolley support base, a main arch frame arranged on the trolley support base, a plurality of supports radially arranged on the main arch frame, and a secondary lining inner formwork arranged on the supports, wherein the supports comprise a hydraulic cylinder, a supporting wheel group arranged at the telescopic end of the hydraulic cylinder and rotatable along the telescopic end of the hydraulic cylinder, and the supporting wheel group is used to support the secondary lining inner formwork.

[0009] Preferably, the extended lines of the axes of the plurality of hydraulic cylinders intersect at the same point.

[0010] Preferably, the supporting wheel group includes a rotating shaft arranged along the direction of the tunnel and rotatably connected to the telescopic end of the hydraulic cylinder, support rods vertically arranged at both ends of the rotating shaft, and rotatable rollers are arranged at both ends of the support rods, and the rollers are used to support the second lining inner template.

[0011] Preferably, the second lining inner template comprises a rubber layer and a metal layer compounded on the upper surface of the rubber layer, and longitudinal reinforcing ribs are arranged in the rubber layer, and the direction of the longitudinal reinforcing ribs is the same as the direction of the tunnel.

[0012] Preferably, a mushroom nail is provided on the surface where the metal layer and the rubber layer are composited, and the mushroom nail is inserted and vulcanized in the rubber layer.

[0013] Preferably, a connecting slot for connecting adjacent rubber layers is provided on the side wall of the rubber layer, the cross section of the connecting slot is a connected rectangle and a circle, and adjacent connecting slots are connected by a matching connecting strip.

[0014] Preferably, a long hole connecting plate perpendicular to the lower surface of the rubber layer is provided on the lower surface of the rubber layer, the direction of the long hole connecting plate is perpendicular to the direction of the longitudinal reinforcing ribs, and the roller is provided with mounting bolts perpendicular to the roller, and the mounting bolts pass through the long holes of the long hole connecting plate.

[0015] Preferably, the long hole connecting plate and the rubber layer are both made of rubber material, and the long hole connecting plate and the rubber layer are integrally pressed and formed.

[0016] Preferably, two long hole connecting plates are provided, and are symmetrically arranged on both sides of the straight line where the rotation axis is located.

[0017] Preferably, the trolley support base can move forward by wheels, tracks or tracks.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] 1. The present invention can change the shape of the supporting structure of the entire trolley by changing the length of the hydraulic cylinder, and can change the curvature of the second lining inner template by cooperating with the flexible characteristics of the steel plate rubber composite flexible second lining inner template. The geometric dimensions of the second lining inner template can be changed by mechanical connection of the steel plate rubber composite flexible second lining inner template. The steel plate rubber composite flexible second lining inner template and the second lining end face sealing plate are fixed by fixing bolts at the top of the piston rod, which overcomes the traditional method of replacing and fixing the second lining template. The changeable cross-section is no longer a fixed size and shape, and can cover all areas of cross-section changes brought about by changes in the hydraulic cylinder.

[0020] 2. The variable cross-section of the secondary lining trolley can be carried out without replacing the fixed steel formwork and the connecting structure. Through the application of the above technologies, the shape and scale can be continuously changed, and the purpose of arbitrarily adjusting the cross-section can be achieved; only the number of steel plate rubber composite flexible secondary lining inner templates needs to be increased or decreased, and the purpose of variable cross-section can be achieved by replacing parts to the minimum extent through the combination of various sizes; the demoulding work is also compatible with the supporting hydraulic cylinder, and due to the addition of the steel plate rubber composite flexible secondary lining inner template, the impact back during demoulding is significantly reduced, and orderly and refined demoulding can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 work.

[0022] Figure 1 It is a schematic diagram of the relationship between the equipment body of the present invention and the tunnel cross section;

[0023] Figure 2 It is a schematic diagram of the relationship between the equipment body of the present invention and the tunnel cross section;

[0024] Figure 3 This is a view of the device body 2 of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the hydraulic cylinder and the rotatable supporting wheel set of the present invention;

[0026] Figure 5 This is a schematic diagram of the relationship between the curvature and angle changes that the hydraulic cylinder of the present invention can adapt to;

[0027] Figure 6 It is a schematic diagram of the oil cylinder of the equipment of the present invention;

[0028] Figure 7 This is a schematic diagram of the second lining inner lining template of the present invention;

[0029] Figure 8 It is a schematic cross-sectional view of the second lining inner template of the present invention;

[0030] Fig. 9 The second lining inner template of the present invention can change the arc according to the extension and contraction of the hydraulic cylinder;

[0031] Fig.10 A schematic diagram of mushroom nails arranged on a metal layer of the present invention;

[0032] Fig.11 It is a schematic diagram of the relative relationship between the rubber layer and the mushroom nail of the present invention;

[0033] Fig.12 The cross section of the second lining template of the present invention is shown as follows Figure 1 ;

[0034] Fig.13 The cross section of the second lining template of the present invention is shown as follows Figure 2 ;

[0035] Fig.14 This is a schematic diagram of the structure of the second lining inner template of the present invention being equipped with a long hole connecting plate;

[0036] Fig.15 The longitudinal view of the second lining inner template of the present invention is a schematic diagram of deformation Figure 1 ;

[0037] Fig.16 The longitudinal view of the second lining inner template of the present invention is a schematic diagram of deformation Figure 2 ;

[0038] Fig.17 It is a schematic diagram of the relationship between the connecting slots between two adjacent lining inner templates of the present invention;

[0039] Fig.18 This is a schematic diagram of the second lining inner template of the present invention being provided with connecting slots all around;

[0040] Fig.19 The schematic diagram of the state when the two lining inner templates and the connecting strips are connected to each other in the present invention Figure 1 ;

[0041] Fig. 20 The schematic diagram of the state when the two lining inner templates and the connecting strips are connected to each other in the present invention Figure 2 ;

[0042] Fig.21 It is a schematic diagram of the state when the two lining inner templates of the present invention are assembled;

[0043] Fig. 22 This is a schematic diagram of the state of the second lining inner template of the present invention when multiple length series are assembled, and the longitudinal length is a fixed value;

[0044] Fig.23It is a schematic diagram of the state of the two lining inner templates of the present invention when they are assembled longitudinally;

[0045] Fig.24 The schematic diagram of the relationship between the supporting wheel group at the top of the piston rod of the present invention, the connecting plate with a long hole connecting the steel plate rubber composite flexible second lining inner template and the hydraulic cylinder Figure 1 ;

[0046] Fig.25 The schematic diagram of the relationship between the supporting wheel group at the top of the piston rod of the present invention, the connecting plate with a long hole connecting the steel plate rubber composite flexible second lining inner template and the hydraulic cylinder Figure 2 ;

[0047] Fig.26 A schematic diagram of the relationship between the support wheel assembly at the top end of the piston rod of the present invention and the second lining end face sealing plate;

[0048] Fig. 27 This is a schematic diagram of the continuous variable cross-section trolley of the present invention being able to perform continuous adjustment in two dimensions: cross-section size and cross-section shape;

[0049] Fig.28 A schematic diagram of the cross-sectional shape of a tunnel compatible with the continuously variable cross-sectional trolley of the present invention;

[0050] Among them, 1. surrounding rock; 2. invert arch; 3. trolley body; 4. secondary lining concrete pouring space; 5. poured secondary lining; 6. trolley support base; 7. main arch frame; 8. hydraulic cylinder; 9. support wheel set; 10. secondary lining inner formwork; 11. secondary lining end face sealing plate; 12. mounting bolts; 13. connecting slot; 14. rubber layer; 15. metal layer; 16. long hole connecting plate; 17. longitudinal reinforcement ribs; 18. mushroom nails; 19. mushroom nail vulcanization position; 20. connecting parts. DETAILED DESCRIPTION

[0051] 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.

[0052] The purpose of the present invention is to provide a secondary lining trolley with a continuously variable cross-section to solve the problems existing in the above-mentioned prior art. A combination of a retractable hydraulic cylinder and a flexible steel plate rubber composite flexible secondary lining inner template is adopted to achieve a continuously variable cross-section, overcoming the traditional method of replacing the fixed secondary lining template. The changeable cross-section is no longer a fixed size and shape, and can cover all areas of cross-section changes brought about by changes in the hydraulic cylinder.

[0053] 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.

[0054] refer to Figures 1 to 28 , a continuously variable cross-section secondary lining trolley, comprising a trolley support base, a main arch frame arranged on the trolley support base, a plurality of supports radially arranged on the main arch frame and a secondary lining template arranged on the supports, the support comprising a hydraulic cylinder, a supporting wheel group arranged at the telescopic end of the hydraulic cylinder and rotatable along the telescopic end of the hydraulic cylinder, the supporting wheel group being used to support the secondary lining template; the present invention can change the shape of the supporting structure of the entire trolley by changing the length of the hydraulic cylinder, and can change the curvature of the secondary lining template by combining the flexible characteristics of the steel plate rubber composite flexible secondary lining template, and can change the geometric dimensions of the secondary lining template by mechanical connection of the steel plate rubber composite flexible secondary lining template, and fix the steel plate rubber composite flexible secondary lining template and the secondary lining end face sealing plate by the fixing bolts at the top end of the piston rod, thereby overcoming the traditional method of replacing and fixing the secondary lining template, and the change of the cross-section is no longer a fixed size and shape, and can cover all areas of cross-section changes brought about by the change of the hydraulic cylinder.

[0055] Furthermore, the extension lines of the axes of several hydraulic cylinders intersect at the same point; the center lines of the hydraulic cylinders of the entire equipment intersect at a center point, and at the same time, the hydraulic cylinders are evenly distributed at equal angles, which makes it easy to control the extension length of the hydraulic cylinders and the different shapes and sizes of the cross-sections.

[0056] refer to Figure 4 The supporting wheel group includes a rotating shaft arranged along the direction of the tunnel and rotatably connected to the telescopic end of the hydraulic cylinder, supporting rods vertically arranged at both ends of the rotating shaft, and rotatable rollers are arranged at both ends of the supporting rods, and the rollers are used to support the second lining inner template;

[0057] refer to Figures 7 to 12 The second lining inner formwork includes a rubber layer and a metal layer composited on the upper surface of the rubber layer. The rubber layer is provided with longitudinal reinforcing ribs, and the direction of the longitudinal reinforcing ribs is the same as the direction of the tunnel. Longitudinal steel bars are arranged in the longitudinal direction inside the entire steel plate rubber composite flexible second lining inner formwork, which can ensure that the longitudinal strength and straightness can be guaranteed while the curvature on the tunnel section changes. The curvature can be changed with the change of the trolley support structure to achieve the purpose of continuously variable section.

[0058] In addition, the continuously variable cross-section in the design is a variable range within the range that can be covered by the extension and contraction of the hydraulic cylinder. Since the steel plate rubber composite flexible double-lined inner template is used in this design, the purpose of changing the cross-section can be achieved without replacing the module of a specific shape. The curvature change brought about by changing the cross-section is achieved through flexible compatibility, and the length change brought about is lengthened and shortened through the special splicing structure of the steel plate rubber composite flexible double-lined inner template. The standard length is set and the standard template lengths of 1 / 2, 1 / 4, 1 / 8, 1 / 16, and 1 / 32 are designed at the same time to achieve the purpose of accurately combining the required length.

[0059] Furthermore, the cross-sectional shape of this design does not require special replacement of internal supporting structures and fixed-shaped steel formwork when changing, which increases the compatibility of the trolley and the versatility and reusability of components, effectively improving construction efficiency and quality, and can achieve rapid switching of cross-sections, fast construction speed, time and labor saving, good quality, and safety and stability.

[0060] refer to Figures 8 to 10 A mushroom nail is arranged on one side where the metal layer and the rubber layer are composited, and the mushroom nail is inserted into the rubber layer; the flexible inner lining of the equipment is made of a metal-rubber composite material, which has the characteristics of shape retention and a certain deformation ability. The metal layer is in contact with the concrete poured by the second lining to provide a smooth surface, and the rubber body layer provides basic strength. The two are combined together through a vulcanization process, and longitudinal reinforcement ribs are arranged in the longitudinal direction inside the entire steel plate rubber composite flexible second lining inner template, and raised mushroom nails are arranged on the metal layer to ensure the stability of the combination of the two.

[0061] refer to Figure 13 to Figure 14 A connecting slot for connecting adjacent rubber layers is provided on the side wall of the rubber layer. The cross section of the connecting slot is a connected rectangle and a circle. Adjacent connecting slots are connected by matching connecting strips.

[0062] refer to Figure 13 to Figure 14 A long hole connecting plate perpendicular to the lower surface of the rubber layer is provided on the lower surface of the rubber layer, and the direction of the long hole connecting plate is perpendicular to the direction of the longitudinal reinforcing ribs. The roller is provided with a mounting bolt perpendicular to the roller, and the mounting bolt passes through the long hole of the long hole connecting plate.

[0063] Furthermore, the outer side (rubber side) of the steel plate rubber composite flexible second lining inner template is provided with a connecting plate with a long hole (made of rubber, pressed and formed as one piece with the rubber layer, which can change with the curvature of the metal rubber composite material lining template and can also serve as a raised structure as a reinforcement rib) which can be connected to the supporting wheel group at the top end of the piston rod to ensure the position limitation between the steel plate rubber composite flexible second lining inner template and the supporting wheel group.

[0064] Furthermore, two long hole connecting plates are provided, and are symmetrically arranged on both sides of the straight line where the rotation axis is located.

[0065] Furthermore, the basic design of the trolley body is only used to illustrate the function of the variable cross-section, and does not mean that the frame structure can only be the structure shown in the figure. At the same time, the trolley body may or may not have the ability to walk independently, and the walking method may also be a variety of current trolley solutions such as wheeled, tracked or crawler-type.

[0066] The number of hydraulic cylinders, hydraulic cylinder stroke and hydraulic cylinder stages can be changed according to different projects, and does not mean only the number, hydraulic cylinder stroke and hydraulic cylinder stages shown in the diagram.

[0067] refer to Fig.25 The longitudinal reinforcement ribs inside the steel plate rubber composite flexible second lining inner formwork can be overlapped on the wheels of the rotatable supporting wheel set, and the overlap on both sides is strong enough to support the weight of the internal concrete.

[0068] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A continuously variable cross-section secondary lining trolley, characterized in that: It includes a trolley support base, a main arch frame arranged on the trolley support base, a plurality of supports radially arranged on the main arch frame, and a secondary lining template arranged on the supports, wherein the supports include a hydraulic cylinder, a supporting wheel group arranged at the telescopic end of the hydraulic cylinder and rotatable along the telescopic end of the hydraulic cylinder, and the supporting wheel group is used to support the secondary lining template.

2. The continuously variable cross-section secondary lining trolley according to claim 1, characterized in that: The extended lines of the axes of the plurality of hydraulic cylinders intersect at the same point.

3. The continuously variable cross-section secondary lining trolley according to claim 1, characterized in that: The supporting wheel group includes a rotating shaft arranged along the direction of the tunnel and rotatably connected to the telescopic end of the hydraulic cylinder, and support rods vertically arranged at both ends of the rotating shaft. Rotatable rollers are arranged at both ends of the support rods, and the rollers are used to support the second lining inner template.

4. The continuously variable cross-section secondary lining trolley according to claim 3, characterized in that: The second lining inner template comprises a rubber layer and a metal layer compounded on the upper surface of the rubber layer. The rubber layer is provided with longitudinal reinforcing ribs, and the direction of the longitudinal reinforcing ribs is the same as the direction of the tunnel.

5. The continuously variable cross-section secondary lining trolley according to claim 4, characterized in that: A mushroom nail is arranged on one side where the metal layer and the rubber layer are combined, and the mushroom nail is inserted and vulcanized in the rubber layer.

6. The continuously variable cross-section secondary lining trolley according to claim 5, characterized in that: A connecting slot for connecting adjacent rubber layers is provided on the side wall of the rubber layer. The cross section of the connecting slot is a connected rectangle and a circle. Adjacent connecting slots are connected by a matching connecting strip.

7. The continuously variable cross-section secondary lining trolley according to claim 6, characterized in that: A long hole connecting plate perpendicular to the lower surface of the rubber layer is arranged on the lower surface of the rubber layer, and the direction of the long hole connecting plate is perpendicular to the direction of the longitudinal reinforcing ribs. The roller is provided with a mounting bolt perpendicular to the roller, and the mounting bolt passes through the long hole of the long hole connecting plate.

8. The continuously variable cross-section secondary lining trolley according to claim 7, characterized in that: The long hole connecting plate and the rubber layer are both made of rubber material, and the long hole connecting plate and the rubber layer are integrally pressed and formed.

9. The continuously variable cross-section secondary lining trolley according to claim 7, characterized in that: The long hole connecting plates are provided in two rows and are symmetrically arranged on both sides of the straight line where the rotating shaft is located.

10. The continuously variable cross-section secondary lining trolley according to claim 1, characterized in that: The trolley support base can move forward by wheels, tracks or tracks.

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