Steel mould for secondary lining construction of non-rectangular small-section underground excavation channel

Abstract

The invention discloses a secondary lining construction steel mold for a non-rectangular small-section underground excavation channel, and relates to the technical field of tunnel engineering construction, the secondary lining construction steel mold comprises a device body, a transverse supporting assembly is transversely installed on the inner side of the device body, and a plate buckle frame assembly is longitudinally installed on the inner side of the device body. According to the secondary lining construction steel die for the non-rectangular small-section underground excavation channel, the first sealing gasket and the second sealing gasket are firmly pressed through the first limiting rod and the second limiting rod, sealing can be effectively conducted, and the sealing effect after installation is completed is guaranteed. Through the arrangement of the first limiting groove and the second limiting groove, the positioning and guiding effects can be achieved on the installation of the side mold and the top mold, so that the installation efficiency is improved, and the situation of position deviation in the installation process is effectively avoided; and the corresponding supporting effect can be effectively achieved through the supporting pieces, and the situation that the side mold topples over is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering construction, in particular to a steel formwork for secondary lining construction of a non-rectangular small-section dark-excavated channel. Background Art

[0002] Tunnel construction is a systematic project to excavate passages and construct permanent structures in complex environments such as underground or mountainous areas. It involves multiple processes, including geological surveys, excavation support, and lining construction. It requires a comprehensive response to challenges such as stratum stress, groundwater, and rock and soil geological properties. Tunnel penetration is achieved through drilling and blasting, shield tunneling, and underground excavation, while relying on initial support and secondary lining (secondary lining) to ensure structural safety and functionality. Among them, steel formwork used for secondary lining construction of non-rectangular small-section underground excavated passages belongs to a key technical branch of tunnel construction equipment, focusing on solving the secondary lining forming problem of underground excavated passages with non-rectangular (such as horseshoe-shaped, trapezoidal, and other special-shaped sections) and small-size cross-sections. The installation and removal of steel formwork within a limited space, combined with the concrete pouring process, ensures the dimensional accuracy, surface flatness, and mechanical properties of the secondary lining structure. This overcomes technical bottlenecks such as limited space, inconvenient operation, and difficult forming quality control in small-section construction, providing equipment support for the safe construction and long-term stability of underground excavated tunnels.

[0003] Current:

[0004] 1. The general steel formwork may have poor sealing effect during the installation process, which may lead to slurry leakage at the joints during the concrete pouring process, and then cause defects such as honeycomb, rough surface, exposed reinforcement, etc. on the secondary lining surface. In severe cases, holes or interlayers may be formed, weakening the structural bearing capacity.

[0005] 2. The installation and disassembly process of common steel formwork is rather cumbersome, and the corresponding guiding function is lacking during the installation process, which leads to position deviation during installation, and the staff are required to perform repeated adjustments, which increases the labor and time cost, and also leads to a decrease in the quality of steel formwork installation, resulting in poor subsequent secondary lining effect.

[0006] 3. After the general steel formwork is installed, the bottom formwork and side formwork are usually installed and fixed only with fixing bolts, which makes the supporting force of the side formwork insufficient, resulting in insufficient supporting force during the concrete pouring process, affecting the efficiency of the subsequent secondary lining, and in severe cases, causing the side formwork to topple over, thereby reducing the safety of workers during construction. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides a steel formwork for secondary lining construction of a non-rectangular small-section underground excavation tunnel, which solves the problems raised in the above-mentioned background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a steel formwork for the second lining construction of a non-rectangular small-section underground tunnel, comprising a device body, a transverse support assembly being laterally installed on the inner side of the device body, and a buckle frame assembly being longitudinally installed on the inner side of the device body.

[0009] The device body includes a bottom mold, and the top two sides of the bottom mold are fixedly connected to the first limiting rod, and the top two sides of the bottom mold are slidably connected to the side mold outside the first limiting rod. Threaded slots are opened on both sides of the top of the bottom mold, and a threaded slot is opened on the upper part of one end of the side mold.

[0010] The lateral support assembly includes a first I-beam evenly installed on one end of the side form, a second I-beam is installed on the top of the first I-beam, and a first wooden beam is evenly installed on one end of the first I-beam.

[0011] The buckle rack assembly includes a base evenly installed on the bottom mold, a vertical pole sleeve is installed on the top of the base, an adjustment frame is installed on the top of the vertical pole sleeve, a second wooden beam is installed on the top of the adjustment frame, the vertical pole sleeves are connected by a horizontal mounting rod, and an oblique mounting rod is installed at the lower part of the vertical pole sleeve.

[0012] Further preferably, the device body also includes a first mounting plate, a second mounting plate and a third mounting plate, the tops of the first mounting plate, the second mounting plate and the third mounting plate are fixedly connected to support members, the top of the side mold is slidably connected to the top mold, the two ends of the bottom of the top mold are fixedly connected to the second limit rods, the inner two ends of the top mold are evenly fixedly connected to the fourth mounting plate, one end of the side mold is evenly opened with a vibration window, the first mounting plate, the second mounting plate and the third mounting plate are fixedly connected to the lower part of one end of the side mold in sequence.

[0013] Further preferably, the lateral support assembly also includes a steel pipe, both ends of the steel pipe are threadedly connected to threaded columns, one end of the threaded column is fixedly connected to a limiting block, the outside of the threaded column is rotatably connected to a limiting frame, and the steel pipe is located between the first wooden beams.

[0014] Further preferably, a first limiting groove consistent with the external dimension structure of the first limiting rod is formed at the bottom of the side mold, and a sealing gasket is installed on the inner side of the first limiting groove.

[0015] Further preferably, a second limiting groove consistent with the external dimension structure of the second limiting rod is opened on the top of the side mold, and a sealing gasket is installed on the inner side of the second limiting groove.

[0016] Further preferably, the first mounting plate, the second mounting plate, the third mounting plate and the fourth mounting plate are all provided with mounting holes.

[0017] Further preferably, a casting window is provided on the top of the top mold.

[0018] Further preferably, thread grooves are provided on the inner sides of both ends of the steel pipe, a smooth slot hole is provided in the middle of one end of the limiting frame, and the threaded column and the limiting block form a rotating structure.

[0019] Further preferably, there are several upright pole sleeves, and the base, the upright pole sleeve, the adjustment frame and the second wooden beam form a group, and there are several groups in total.

[0020] Further preferably, mounting holes are provided around the bottom of the base.

[0021] The present invention provides a steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel, which has the following features:

[0022] Beneficial effects:

[0023] The steel formwork for secondary lining construction of a non-rectangular small-section underground excavation channel is provided with a first sealing gasket and a second sealing gasket, so that when the bottom formwork, the side formwork and the top formwork are installed, the first sealing gasket and the second sealing gasket can be firmly pressed by the first limiting rod and the second limiting rod to facilitate effective sealing, thereby ensuring the sealing effect after installation is completed, and effectively avoiding the leakage of concrete during the pouring process, so that defects such as honeycomb, rough surface, exposed reinforcement, etc. appear on the surface of the secondary lining, thereby effectively improving the structural bearing capacity of the secondary lining and effectively improving the construction quality.

[0024] The steel formwork for the second lining construction of a non-rectangular small-section dark excavation channel is provided with a first limiting groove and a second limiting groove, so that the first limiting rod can slide on the inner side of the first limiting groove, thereby having a positioning and guiding effect on the installation of the side formwork, and the second limiting rod can slide on the inner side of the second limiting groove, thereby having a positioning and guiding effect on the installation of the top, so that the installation efficiency is improved, and the occurrence of position offset during the installation process is effectively avoided. After the installation is completed, the fixing bolts can be passed through the mounting holes of the first mounting plate, the second mounting plate, the third mounting plate and the fourth mounting plate and then enter the threaded slot holes, thereby completing the overall installation and fixing work. The whole process is easy and convenient, and does not require repeated adjustment processes, which reduces labor while saving time costs and effectively improves work efficiency.

[0025] This steel formwork for the secondary lining construction of a non-rectangular small-section underground excavation channel is equipped with additional support members, so that after the side formwork is installed, the support members can effectively provide corresponding support effects, thereby improving the longitudinal support force and avoiding the side formwork from tipping over. In addition, the horizontal support components can support the side formwork in the horizontal direction, further increasing stability, improving the subsequent pouring quality, and also improving the safety of workers during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a main schematic diagram of the invention;

[0027] Figure 2 This is a schematic diagram of the main explosion view of the invention;

[0028] Figure 3 It is a front view schematic diagram of the invention;

[0029] Figure 4 This is a schematic diagram of the explosion of the device body in the invention;

[0030] Figure 5 This is an exploded schematic diagram of the transverse support assembly in the invention;

[0031] Figure 6 For this invention Figure 5 A in the middle is an enlarged schematic diagram;

[0032] Figure 7 This is a schematic diagram of the explosion of the disc buckle rack assembly in the invention.

[0033] In the figure: 1. Device body; 101. Bottom mold; 102. First limiting rod; 103. Side mold; 104. First mounting plate; 105. Second mounting plate; 106. Third mounting plate; 107. Support member; 108. Top mold; 109. Second limiting rod; 1010. Fourth mounting plate; 1011. Vibrating window; 2. Horizontal support assembly; 201. First I-beam; 202. Second I-beam; 203. First wooden beam; 204. Steel pipe; 205. Threaded column; 206. Limit block; 207. Limit frame; 3. Hook frame assembly; 301. Base; 302. Vertical pole sleeve; 303. Adjustment frame; 304. Second wooden beam; 305. Horizontal mounting rod; 306. Oblique mounting rod. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] See also Figures 1 to 7 The present invention provides a technical solution: a steel formwork for the secondary lining construction of a non-rectangular small-section underground excavation channel, comprising a device body 1, a lateral support assembly 2 is installed laterally on the inner side of the device body 1, and a buckle frame assembly 3 is installed longitudinally on the inner side of the device body 1.

[0038] The device body 1 includes a bottom mold 101, and the first limiting rods 102 are fixedly connected to the top sides of the bottom mold 101. The side molds 103 are slidably connected to the outside of the first limiting rods 102 on the top sides of the bottom mold 101. Threaded slots are opened on both sides of the top of the bottom mold 101, and a threaded slot is opened on the upper part of one end of the side mold 103.

[0039] The lateral support assembly 2 includes a first I-beam 201 evenly installed on one end of the side form 103 , a second I-beam 202 is installed on the top of the first I-beam 201 , and a first wooden beam 203 is evenly installed on one end of the first I-beam 201 .

[0040] The buckle frame assembly 3 includes a base 301 evenly installed on the bottom mold 101, a vertical pole sleeve 302 is installed on the top of the base 301, an adjustment frame 303 is installed on the top of the vertical pole sleeve 302, a second wooden beam 304 is installed on the top of the adjustment frame 303, the vertical pole sleeves 302 are connected by a horizontal mounting rod 305, and an oblique mounting rod 306 is installed at the lower part of the vertical pole sleeve 302.

[0041] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the device body 1 also includes a first mounting plate 104, a second mounting plate 105 and a third mounting plate 106. The tops of the first mounting plate 104, the second mounting plate 105 and the third mounting plate 106 are fixedly connected with a support member 107, the top of the side mold 103 is slidably connected with a top mold 108, the bottom ends of the top mold 108 are fixedly connected with a second limiting rod 109, the inner ends of the top mold 108 are evenly fixedly connected with a fourth mounting plate 1010, and one end of the side mold 103 is evenly provided with a vibration window 1011. The first mounting plate 104, the second mounting plate 105 and the third mounting plate 106 are fixedly connected to the lower part of one end of the side mold 103 in sequence.

[0042] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the lateral support assembly 2 also includes a steel pipe 204, both ends of the steel pipe 204 are threadedly connected to a threaded column 205, one end of the threaded column 205 is fixedly connected to a limiting block 206, the outside of the threaded column 205 is rotatably connected to a limiting frame 207, and the steel pipe 204 is located between the first wooden beams 203.

[0043] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a first limiting groove that is consistent with the external dimension structure of the first limiting rod 102 is opened at the bottom of the side mold 103, and a sealing gasket is installed on the inner side of the first limiting groove.

[0044] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a second limiting groove that is consistent with the external dimension structure of the second limiting rod 109 is opened on the top of the side mold 103, and a sealing gasket is installed on the inner side of the second limiting groove.

[0045] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the first mounting plate 104 , the second mounting plate 105 , the third mounting plate 106 and the fourth mounting plate 1010 are all provided with mounting holes.

[0046] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a pouring window is provided on the top of the top mold 108 .

[0047] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, thread grooves are opened on the inner sides of both ends of the steel pipe 204, and a smooth slot hole is opened in the middle of one end of the limiting frame 207, and the threaded column 205 and the limiting block 206 form a rotating structure.

[0048] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 7 As shown, there are a plurality of vertical pole sleeves 302 , and the base 301 , vertical pole sleeve 302 , adjustment frame 303 and second wooden beam 304 form a group, and there are a plurality of groups in total.

[0049] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 7 As shown, mounting holes are provided around the bottom of the base 301 .

[0050] This is a steel formwork used for the secondary lining construction of non-rectangular small-section underground excavation tunnels. When in use, the working process is as follows:

[0051] like Figures 1 to 7 As shown, first install the bottom mold 101 in a suitable area, then align the first limiting groove at the bottom of the side mold 103 with the first limiting rod 102, and then slide the side mold 103 to install the side mold 103. At this time, the sealing gasket inside the first limiting groove is squeezed by the first limiting rod 102, thereby ensuring the sealing between the side mold 103 and the bottom mold 101. Then, the fixing bolts are passed through the mounting holes of the first mounting plate 104, the second mounting plate 105 and the third mounting plate 106, and then enter the threaded slots opened on both sides of the top of the bottom mold 101, thereby completing the installation and fixing of the side mold 103 and the bottom mold 101.

[0052] Next, align the second limiting rods 109 at both ends of the top of the top mold 108 with the second limiting grooves, and then slide the top mold 108 to install the top mold 108. At this time, the sealing gasket inside the second limiting groove will be squeezed by the second limiting rods 109, thereby ensuring the sealing between the top mold 108 and the side mold 103. Then, pass the fixing bolts through the mounting holes of the fourth mounting plate 1010 and then enter the threaded slots opened at the upper part of one end of the side mold 103, thereby completing the installation and fixing of the side mold 103 and the top mold 108, and provide a certain support to the longitudinal direction of the side mold 103 by the support members 107.

[0053] The first I-beam 201 is evenly installed on one end of the side form 103, so that one end of the first I-beam 201 is in contact with one end of the side form 103, and then the second I-beam 202 is installed on the top of the first I-beam 201, so that the outer side of the second I-beam 202 is in contact with the inner side of the top form 108, and then the threaded column 205 is rotated so that the threaded column 205 is slowly extended out of the steel pipe 204 through the thread transmission with the thread groove, thereby driving the limit frame 207 to move in the horizontal direction. When the inner side of the limit frame 207 is in contact with the outer side of the first wooden beam 203, the threaded column 205 is continued to be rotated. At this time, under the action of the smooth slot hole, the limit frame 207 can move horizontally without rotating, thereby providing effective lateral support for the first wooden beam 203, thereby supporting the side form 103 in the lateral direction through the first wooden beam 203 to prevent it from tipping over.

[0054] The top of the second wooden beam 304 is fitted with the inner side of the top form 108, and the horizontal mounting rod 305 is installed between the vertical pole sleeves 302. Finally, the oblique mounting rod 306 is installed on the lower part of the vertical pole sleeves 302 to ensure the stability of the buckle frame assembly 3 and to support the top form 108. At this time, the pouring work can be carried out through the pouring window, and the concrete can be vibrated through the vibration window 1011.

[0055] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0056] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel, comprising a device body (1), characterized in that: A transverse support assembly (2) is installed transversely on the inner side of the device body (1), and a buckle frame assembly (3) is installed longitudinally on the inner side of the device body (1); The device body (1) comprises a bottom mold (101), first limiting rods (102) are fixedly connected to the top two sides of the bottom mold (101), side molds (103) are slidably connected to the outside of the first limiting rods (102) on the top two sides of the bottom mold (101), threaded slots are provided on the top two sides of the bottom mold (101), and a threaded slot is provided on the upper part of one end of the side mold (103); The transverse support assembly (2) comprises a first I-beam (201) uniformly mounted on one end of the side form (103), a second I-beam (202) being mounted on the top of the first I-beam (201), and a first wooden beam (203) being uniformly mounted on one end of the first I-beam (201); The buckle frame assembly (3) comprises a base (301) evenly mounted on the bottom mold (101), a vertical rod sleeve (302) is mounted on the top of the base (301), an adjustment frame (303) is mounted on the top of the vertical rod sleeve (302), a second wooden beam (304) is mounted on the top of the adjustment frame (303), the vertical rod sleeves (302) are connected by a transverse mounting rod (305), and an oblique mounting rod (306) is mounted on the lower part of the vertical rod sleeve (302).

2. The steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel according to claim 1, characterized in that: The device body (1) further comprises a first mounting plate (104), a second mounting plate (105) and a third mounting plate (106); the tops of the first mounting plate (104), the second mounting plate (105) and the third mounting plate (106) are all fixedly connected to a support member (107); the top of the side mold (103) is slidably connected to a top mold (108); the bottom ends of the top mold (108) are fixedly connected to a second limiting rod (109); the inner ends of the top mold (108) are evenly fixedly connected to a fourth mounting plate (1010); one end of the side mold (103) is evenly provided with a vibration window (1011); the first mounting plate (104), the second mounting plate (105) and the third mounting plate (106) are fixedly connected to the lower part of one end of the side mold (103) in sequence.

3. The steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel according to claim 1, characterized in that: The transverse support assembly (2) further comprises a steel pipe (204), both ends of the steel pipe (204) being threadedly connected to threaded columns (205), one end of the threaded column (205) being fixedly connected to a limiting block (206), the outside of the threaded column (205) being rotatably connected to a limiting frame (207), and the steel pipe (204) being located between the first wooden beams (203).

4. The steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel according to claim 1, characterized in that: A first limiting groove that is consistent with the external dimension structure of the first limiting rod (102) is provided at the bottom of the side mold (103), and a sealing gasket is installed inside the first limiting groove.

5. The steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel according to claim 2, characterized in that: A second limiting groove that is consistent with the external dimension structure of the second limiting rod (109) is opened on the top of the side mold (103), and a sealing gasket is installed on the inner side of the second limiting groove.

6. The steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel according to claim 2, characterized in that: The first mounting plate (104), the second mounting plate (105), the third mounting plate (106) and the fourth mounting plate (1010) are all provided with mounting holes.

7. The steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel according to claim 2, characterized in that: A pouring window is provided on the top of the top mold (108).

8. The steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel according to claim 3, characterized in that: The inner sides of both ends of the steel pipe (204) are provided with thread grooves, and a smooth slot hole is provided in the middle of one end of the limiting frame (207), and the threaded column (205) and the limiting block (206) form a rotating structure.

9. The steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel according to claim 1, characterized in that: There are several vertical pole sleeves (302) in total, and the base (301), the vertical pole sleeve (302), the adjustment frame (303) and the second wooden beam (304) form a group, and there are several groups in total.

10. The steel formwork for secondary lining construction of a non-rectangular small-section underground tunnel according to claim 1, characterized in that: The bottom of the base (301) is provided with mounting holes around it.

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