A tunnel-shaped tunnel assembly type groove structure and a fastening method thereof

Abstract

The application provides a tunnel assembly type groove structure and a fastening method thereof. The groove structure comprises a groove one and a groove two. The groove one is provided with an L-shaped slot on one side top and a side wall to be cast in situ after the precast groove is installed. A middle partition wall is located between the groove one and the groove two, and the groove one and the groove two share the middle partition wall. The bottom plate of the groove structure is provided with a horizontal third trapezoidal slot in the width direction at both ends. The middle partition wall is provided with a first trapezoidal slot in the vertical direction at both ends. The side wall of the groove two is provided with a second trapezoidal slot in the vertical direction at both ends. The wall body of the middle partition wall is provided with a concrete rib, and the concrete rib is provided with a channel steel hole. The groove structure is provided with a pulling hole on the middle partition wall. The bottom plate of the groove structure, the groove two and the middle partition wall form a stop word shape structure. The application has the advantages of simple structure, easy implementation, improved standardization level of the tunnel precast installation groove, and reduced misalignment problem between adjacent precast components.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel and underground engineering, and in particular, to a zigzag-shaped prefabricated trench structure for tunnels and a fastening method thereof. Background Art

[0002] At present, the transportation industry is booming, and the achievements in tunnel engineering construction have attracted worldwide attention, and are constantly improving to a higher level. Small components account for a large proportion in auxiliary works such as highway engineering subgrades, bridges and tunnels, and the demand and technical requirements for them are getting higher and higher. In the past, most small components were cast in situ on construction sites using steel formworks or wooden formworks. However, due to large site randomness, difficulty in ensuring reinforcement cover, concrete quality problems and insufficient vibration, problems such as rough concrete components, honeycomb and pockmarked surfaces, poor curing quality, short service life and inadequate finished product protection are often caused. In order to improve the standardization of engineering construction management and increase production efficiency and production quality, factory construction can continuously and effectively control the quality of components, and the construction process is not affected by climate and environment. Factory production of small prefabricated components has become a development trend. Summary of the Invention

[0003] Aiming at the defects in the prior art, the purpose of the present invention is to provide a zigzag-shaped prefabricated trench structure for tunnels and a fastening method thereof, so as to solve the problems of short service life, complex construction and difficult quality guarantee of existing cast-in-situ tunnels.

[0004] According to one aspect of the present invention, there is provided a zigzag-shaped prefabricated trench structure for tunnels, comprising:

[0005] a first trench and a second trench, wherein the top of one side of the first trench is provided with an L-shaped groove, and the other side wall is cast in place after the prefabricated trench is installed;

[0006] a middle partition wall located between the first trench and the second trench, wherein the first trench and the second trench share the middle partition wall;

[0007] both ends of a bottom plate of the trench structure are provided with horizontal third trapezoidal grooves along the width direction, both ends of the middle partition wall are vertically provided with first trapezoidal grooves, and both ends of the side wall of the second trench are vertically provided with second trapezoidal grooves;

[0008] the body of the middle partition wall is provided with concrete ribs, and the concrete ribs are provided with channel steel holes; a traction hole is reserved on the middle partition wall of the trench structure; the bottom plate, the second trench and the middle partition wall of the trench structure form a zigzag-shaped structure.

[0009] optionally, the cross section of the concrete rib is trapezoidal.

[0010] optionally, the channel steel holes are arranged on the concrete ribs at equal intervals.

[0011] Optionally, a drainage hole is provided at the middle bottom of the middle partition wall, said drainage hole penetrates said middle partition wall, and said drainage hole is configured to drain accumulated water in the first groove.

[0012] Optionally, a cover plate positioning hole is provided at the top of the L-shaped groove, and a cover plate is fixed above the groove structure through said cover plate positioning hole.

[0013] Optionally, a hand hole is provided on the bottom plate below the first groove, said hand hole penetrates the bottom plate of the first groove, and said hand holes are symmetrically arranged at both ends of the bottom plate of the first groove.

[0014] Optionally, a horizontal channel is provided in said hand hole on the side close to the end of the bottom plate along the length direction of the groove structure, said horizontal channel horizontally penetrates the end of the bottom plate of the first groove, and said horizontal channels are symmetrically arranged at both ends of the bottom plate of the first groove.

[0015] Optionally, a hand hole filler is provided in said hand hole, the filling surface of said hand hole filler is flush with the surface of the bottom plate of the first groove, and a waterproof coating is applied on the surface layer.

[0016] According to another aspect of the present invention, there is provided a fastening method for the above-mentioned zigzag-shaped assembled tunnel groove structure, said method is implemented by using a fastening frame, said fastening frame comprises two front support legs, two rear support legs and a horizontal frame, the two said front support legs are vertical and have different lengths, the two said rear support legs are inclined towards a direction away from said front support legs and have different lengths, the long support legs of said front support legs and said rear support legs are located on the same side, casters are installed at the bottoms of both said front support legs and said rear support legs; said horizontal frame is located above said front support legs and said rear support legs, the tops of the two said front support legs and the tops of the two said rear support legs are respectively fixedly connected with said horizontal frame; an electric hoist is provided on said horizontal frame;

[0017] Said fastening method comprises:

[0018] Fixing the fastening frame on the installed groove structure, wherein the front support legs and the rear support legs are symmetrically located on both sides of the middle partition wall of the installed groove structure, the long support leg side is supported on the bottom plate on one side of the groove, the short support leg side is supported on the cover plate base of the second groove, and the lower parts of the front support legs and the rear support legs are both fastened to the middle partition wall of the installed groove structure;

[0019] Aligning the newly-installed groove structure with the installed groove structure, winding a steel wire rope on said electric hoist, said steel wire rope passes through a pre-arranged pulling hole on the newly-installed groove structure, pulling the newly-installed groove structure to tighten the connection between the newly-installed groove structure and the installed groove structure.

[0020] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0021] 1. The present invention forms a precast trench body in the shape of a stop by trench one and trench two. The structure is simple and easy to implement. Due to the assembly line prefabrication construction, the steel reinforcement protective layer is easy to control and the concrete construction quality is easy to guarantee. It can effectively guarantee the appearance quality of the precast trench and extend its service life.

[0022] 2. This invention employs a fastening frame to secure the precast trenches. An electric hoist on the fastening frame pulls the precast trenches along a wire rope, thus ensuring a tight connection between adjacent precast trenches. In application, the precast trenches are transported to the working face, the foundation is leveled, and then the precast trenches are installed, aligning the preceding and following sections and fastening the connections between adjacent trenches. After the trenches are installed, cable tray steel is installed through the channel steel holes, cables are laid, and finally, cover plates are installed. The trench structure of this invention is lightweight, avoiding riveting and welding work in confined spaces, improving the construction environment, increasing efficiency, and ensuring good overall linearity control of the precast trenches without unevenness. This improves the standardization level of precast trench installation in tunnels and reduces misalignment between adjacent precast components, solving the problems of complex construction and difficulty in ensuring quality in current cast-in-place trench construction. Attached Figure Description

[0023] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the connection of a two-segment stop-shaped tunnel prefabricated trench structure in one embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection of a three-segment stop-shaped tunnel prefabricated trench structure in one embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the fastening frame in one embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the on-site installation of a T-shaped tunnel prefabricated trench structure according to one embodiment of the present invention.

[0028] The corresponding labels in the attached diagram are: 1-Precast trench body, 101-Trench 1, 102-Trench 2, 2-Intermediate partition wall, 3-Handhole, 4-Horizontal channel, 5-Concrete rib, 6-Channel steel hole, 7-Cover plate positioning hole, 8-Drainage hole, 91-First trapezoidal groove, 92-Second trapezoidal groove, 93-Third trapezoidal groove, 10-Handhole filler, 11-Fastening frame, 111-Front support leg, 112-Rear support leg, 113-Horizontal frame, 114-Cast wheel, 12-Electric hoist, 13-Pull hole, 14-L-shaped groove, 15-Trench 2 cover plate base. Detailed Implementation

[0029] The present invention is described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the inventive concept of the present invention. These all fall within the protection scope of the present invention.

[0030] Reference Figure 1 and Figure 2 , the stop-shaped prefabricated groove structure for tunnels provided by an embodiment of the present invention includes a first groove 101, a second groove 102, an intermediate diaphragm 2, etc. The first groove 101 and the second groove 102 form a prefabricated groove main body 1, and the overall structure of the prefabricated groove main body 1 is in a "stop (zhi)" shape; specifically, an L-shaped groove 14 is provided at the top of one side of the first groove 101, and the other side wall is cast-in-place after the prefabricated groove is installed; the intermediate diaphragm 2 is located between the first groove 101 and the second groove 102, and the first groove 101 and the second groove 102 share the intermediate diaphragm 2; horizontal full-length third trapezoidal grooves 93 are provided at both ends of the bottom plate of the groove structure in the width direction, first trapezoidal grooves 91 are vertically provided at both ends of the intermediate diaphragm 2, and second trapezoidal grooves 92 are vertically provided at both ends of the side wall of the second groove 102. The vertical first trapezoidal grooves 91 and second trapezoidal grooves 92 cross the horizontal third trapezoidal grooves 93 in a T-shape; the grooves of the trapezoidal grooves at both ends are symmetrically arranged opposite to each other and have the same dimensions; a concrete rib 5 is provided on the wall body of the intermediate diaphragm 2, and a channel steel hole 6 is provided on the concrete rib 5; a pulling hole 13 is reserved on the intermediate diaphragm 2 of the groove structure, and the groove structure is pulled at the pulling hole 13 to realize the fastening between adjacent grooves.

[0031] In the embodiment of the present invention, the stop-shaped prefabricated groove main body is formed by the first groove 101 and the second groove 102, as Figure 1 the bottom plate, the intermediate diaphragm, and the side wall of the second groove of the groove structure form a "stop (zhi)"-shaped structure, which has simple structure and is easy to implement. Due to assembly-line prefabricated construction, the steel reinforcement protection layer is easy to control, the concrete construction quality is easy to guarantee, which can effectively ensure the appearance quality of the prefabricated groove and prolong the service life.

[0032] In some embodiments, the cross-section of the concrete rib 5 is trapezoidal, which facilitates demolding during manufacturing. According to the requirements of cable installation space, and to make the size of the concrete rib 5 correspond to the size of the channel steel, preferably, the rib height is 10-12 cm, the bottom width is 13-16 cm, the top width is 9-12 cm, and the channel steel holes 6 are arranged at equal intervals on the concrete rib 5.

[0033] In some embodiments, a drainage hole 8 is provided at the middle bottom of the intermediate diaphragm 2, the drainage hole 8 penetrates through the intermediate diaphragm 2, and the drainage hole 8 is used to drain accumulated water in the first groove. To improve the drainage effect, preferably, the diameter of the drainage hole 8 is 2-3 cm, the drainage hole 8 is arranged obliquely in the intermediate diaphragm 2, and according to the height difference of the bottom plates of the first groove 101 and the second groove 102, the gradient is set to 8-12%.

[0034] To connect the trench structure to the cover plate, the top of the L-shaped groove 14 is provided with cover plate positioning holes 7, through which the cover plate is fixed to the top of the trench structure. Preferably, based on the width of the L-shaped groove 14 and for ease of demolding, the width of the cover plate positioning holes 7 is 2.5-3.5 cm, and the depth is 1.5-2.5 cm. In a specific application, four cover plate positioning holes 7 are provided on the top of the L-shaped groove 14, with spacings of 35 cm, 10 cm, and 35 cm respectively.

[0035] In some embodiments, a horizontal channel 4 is provided on the bottom end side of the trench 101 along the length of the trench structure. The horizontal channel 4 horizontally penetrates the bottom end of the trench 101 and is symmetrically arranged at both ends of the bottom plate of the trench 101.

[0036] To facilitate the connection and fastening of adjacent trench structures, a handhole 3 is provided on the bottom plate below trench 101. A horizontal channel 4 is located on the side wall of the handhole 3 near the end of the bottom plate. The handhole 3 penetrates the bottom plate of trench 101 to facilitate the installation of bolts along the horizontal channel 4. The handholes 3 are symmetrically arranged at both ends of the bottom plate of trench 101 and have the same size. To facilitate manual installation and without affecting structural stability, preferably, a handhole 3 penetrating the thickness of the bottom plate is provided on the bottom plate of trench 101, 5-6 cm from the end and 4-6 cm from the middle partition wall. The handhole 3 is 15-20 cm long and 10-15 cm wide.

[0037] In the above embodiment, a horizontal channel 4 is provided on the handhole wall on the end side of the bottom plate of the groove 101. The horizontal channel 4 penetrates the end of the bottom plate. For ease of installation, the center of the horizontal channel 4 is 5-7cm away from the top surface of the bottom plate. It is symmetrically arranged at both ends of the bottom plate along the length of the precast groove and has the same size. The bolt passes through the adjacent horizontal channel. For ease of bolt penetration, preferably, the diameter of the horizontal channel 4 is 1.5-2mm larger than the outer diameter of the bolt. A length is reserved in the handholes 3 on both sides, such as 3-4cm, to facilitate later fastening.

[0038] In some embodiments, a handhole filler 10 is provided in the handhole 3. The material of the handhole filler 10 is a porous medium material. The filling surface of the handhole filler 10 is flush with the bottom plate surface of the groove 101, and a waterproof coating is applied to the surface.

[0039] In order to achieve a tight connection of the trench structure components by traction, the traction hole 13 penetrates the middle partition wall 2 and is located 2-4cm above the trench cover plate base 15. According to factors such as structural weight, the hole diameter of the traction hole 13 is preferably 1-2cm.

[0040] In this embodiment of the invention, the trench structure is prefabricated uniformly in the component prefabrication plant. Special attention must be paid to the pre-reservation of manholes 3, channel steel holes 6, drainage holes 8, and horizontal channels 4 during prefabrication. After curing, the trenches are stored uniformly. This embodiment of the invention forms a U-shaped prefabricated trench body 1 through trench one 101 and trench two 102. The structure is simple and easy to implement, solving the problems of complex construction and difficulty in ensuring quality in current cast-in-place trenches. Due to the assembly-line prefabrication construction, the reinforcement protective layer is easy to control, and the concrete construction quality is easy to guarantee, effectively ensuring the appearance quality of the prefabricated trench, improving the standardization level of prefabricated installation trenches in tunnels, and extending their service life.

[0041] This invention also provides a fastening method for the above-mentioned prefabricated trench structure with a stop-shaped tunnel. The fastening method is implemented using a fastening frame 11, as described above. Figures 1-3 The fastening frame 11 includes two front support legs 111, two rear support legs 112, and a horizontal frame 113. The two front support legs 111 are vertical and of different lengths, while the two rear support legs 112 are inclined away from the front support legs 111 and of different lengths. The longer legs of the front support legs 111 and rear support legs 112 are located on the same side, and casters 114 are installed at the bottom of both the front support legs 111 and the rear support legs 112. The horizontal frame 113 is located above the front support legs 111 and the rear support legs 112, and the tops of the two front support legs 111 and the horizontal frame 113 are connected to the horizontal frame 113. The tops of the two rear support legs 112 are fixedly connected to the horizontal frame 113; an electric hoist 12 is installed on the horizontal frame 113; specifically, the fastening frame 11 is processed according to the structural dimensions of the precast trench. The front support leg 111 of the fastening frame 11 is made of square steel pipe, and casters 114 are installed at the bottom of the front support leg 111. The front support legs 111 are symmetrically arranged on both sides of the central partition wall 2, and the lengths of the two front support legs 111 are different. The lower part of the front support leg 111 is fastened to the central partition wall 2 by bolts passing through holes 6 of channel steel #1 and #3. Considering the spacing of the precast concrete ribs, in order to improve stability, the tilt angle of the rear support leg 112 is 15°-25°, preferably 20°. The rear support leg 112 is made of square steel pipe, and the lower part of the rear support leg 112 is fastened to the central partition wall 2 by bolts passing through holes 6 of channel steel #2. The structural design of the front support leg being vertical and the rear support leg being tilted is conducive to improving stability and at the same time facilitates the movement of the fastening frame. The front outrigger 111 and the rear outrigger 112 are connected as a whole by a horizontal frame 113. The horizontal frame 113 consists of two square steel pipes arranged inside the front outrigger 111 and the rear outrigger 112, and is connected to the front outrigger 111 and the rear outrigger 112 by connectors. A steel wire rope is wound around the electric hoist 12 on the horizontal frame 113; the fastening method includes:

[0042] The fastening bracket 11 is fixed to the installed trench structure, so that the front support leg 111 and the rear support leg 112 are symmetrically located on both sides of the middle partition wall 2 of the installed trench structure. The long support leg is supported on the side bottom plate of the trench one 101, and the short support leg is supported on the cover plate base 15 of the trench two. The lower parts of the front support leg 111 and the rear support leg 112 are fastened to the middle partition wall 2 of the installed trench structure.

[0043] Align the newly installed trench structure with the existing trench structure, wind a steel wire rope around the electric hoist 12, pass the steel wire rope through the pull hole 13 reserved on the newly installed trench structure, turn on the electric hoist 12 to pull the steel wire rope, pull the newly installed trench structure, thereby tightening the connection between the newly installed trench structure and the existing trench structure.

[0044] In this embodiment of the invention, during application, the prefabricated trench body 1 is transported to the working face, referring to... Figure 4 Before installation, water-stopping material must be installed in each trapezoidal groove, and the trench foundation must be leveled. After leveling, the precast trench body 1 is placed sequentially on top of the pad layer. The precast trench bodies 1 in adjacent positions are adjusted to align the front and rear segments, ensuring that adjacent trenches are aligned. The horizontal trapezoidal grooves of the bottom plates of adjacent precast trenches together form a water-stopping structure, and the vertical trapezoidal grooves are set facing each other to form a water-stopping structure. The horizontal channels 4 in adjacent manholes 3 are adjusted to be on the same axis, and the screws pass through the adjacent horizontal channels 4, leaving lengths in the manholes 3 on both sides for later tightening.

[0045] After tightly connecting the newly installed trench structure with the existing trench structure, install a nut and connector washer at the end of the threaded rod inside the manhole 3, tighten the nut, and complete the connection. The manhole filler 10 is filled into the manhole 3 after the prefabricated trench body 1 is installed, and waterproofing treatment is applied. After the trench installation is complete, the channel steel is inserted into the channel steel hole 6 before cable laying to form the cable, allowing for cable installation; finally, the cover plate is installed, thus forming the tunnel trench.

[0046] In the above embodiments, the precast trench fastening construction adopts a fastening frame. The fastening frame spans the central partition of the trench structure and can move freely along the trench structure. It is clamped to the central partition by fastening bolts passing through the channel steel holes to form a stable support structure. An electric hoist is fixed on the fastening frame. The newly installed precast trench body is pulled by the electric hoist pulling the steel wire rope, and the connection between adjacent precast trench bodies is tightened. The trench structure in the embodiments of the present invention is simple, easy to implement, and lightweight. It solves the problems of complex construction procedures and difficulty in ensuring quality in the construction of cast-in-place trenches in tunnels. It can ensure construction quality, avoid riveting and welding work in confined spaces, improve the construction environment, and increase efficiency. The overall linear control of the precast trench is good, with no unevenness. Moreover, no special equipment or complex operations are required on the construction site, thereby improving the standardization level of precast installation trenches in tunnels and reducing the problem of misalignment between adjacent precast components.

[0047] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention. The above preferred features can be used in any combination without conflict.

Claims

1. A fastening method for a stop-shaped fabricated groove structure of a tunnel, characterized in that, Said stop-shaped fabricated groove structure of a tunnel comprises: a first groove and a second groove, wherein an L-shaped groove is provided at the top of one side of said first groove, and the other side wall is cast-in-place after the prefabricated groove is installed; there is a height difference between the bottom plates of said first groove and said second groove; a middle partition wall located between said first groove and said second groove, wherein said first groove and said second groove share said middle partition wall; both ends of the bottom plate of said groove structure are provided with horizontal third trapezoidal grooves along the width direction, both ends of said middle partition wall are provided with first trapezoidal grooves in the vertical direction, and both ends of the side wall of said second groove are provided with second trapezoidal grooves in the vertical direction; concrete ribs are arranged on the wall body of said middle partition wall, and channel steel holes are provided on said concrete ribs; pulling holes are reserved on said middle partition wall by said groove structure; the bottom plate of said groove structure, said second groove and said middle partition wall form a stop-shaped structure; a drainage hole is provided at the middle bottom of said middle partition wall, said drainage hole penetrates through said middle partition wall, and said drainage hole is used for draining accumulated water in said first groove; Said method is implemented by means of a fastening frame, wherein said fastening frame comprises two front legs, two rear legs and a horizontal frame, said two front legs are vertical and have different lengths, said two rear legs are inclined in a direction away from said front legs and have different lengths, the long legs of said front legs and said rear legs are located on the same side, and casters are installed at the bottoms of both said front legs and said rear legs; said horizontal frame is located above said front legs and said rear legs, the tops of said two front legs and the tops of said two rear legs are respectively fixedly connected with said horizontal frame; an electric hoist is provided on said horizontal frame; Said fastening method comprises: fixing the fastening frame on the installed groove structure, wherein the front legs and the rear legs are symmetrically located on both sides of the middle partition wall of the installed groove structure, the long leg side is supported on the bottom plate at one side of the groove, the short leg side is supported on the cover plate base of the second groove, and the lower parts of the front legs and the rear legs are both fastened to the middle partition wall of the installed groove structure; aligning the newly-installed groove structure with the installed groove structure, winding a steel wire rope on the electric hoist, wherein the steel wire rope passes through a pulling hole reserved on the newly-installed groove structure, pulling the newly-installed groove structure, and tightening the connection between the newly-installed groove structure and the installed groove structure.

2. The fastening method for the herringbone prefabricated groove structure of a tunnel according to claim 1, characterized in that, The cross-section of said concrete rib is trapezoidal.

3. The fastening method for the reversed V-shaped prefabricated groove structure of a tunnel according to claim 1, characterized in that, Said channel steel holes are arranged on said concrete rib at equal intervals.

4. A fastening method for a reversed Chinese character “止”-shaped prefabricated groove structure of a tunnel according to claim 1, characterized in that, A cover plate positioning hole is provided at the top of said L-shaped groove, and a cover plate is fixed above said groove structure through said cover plate positioning hole.

5. The fastening method for the check-shaped prefabricated groove structure of a tunnel according to claim 1, characterized in that, A hand hole is provided on the bottom plate below said first groove, said hand hole penetrates through the bottom plate of said first groove, and said hand holes are symmetrically arranged at both ends of the bottom plate of the first groove.

6. A fastening method for an inverted-V-shaped prefabricated groove structure for tunnels according to claim 5, characterized in that, A horizontal channel is provided in said hand hole on the side close to the end of the bottom plate along the length direction of the groove structure, said horizontal channel horizontally penetrates through the end of the bottom plate of the first groove, and said horizontal channels are symmetrically arranged at both ends of the bottom plate of the first groove.

7. A fastening method for a stop-shaped prefabricated groove structure of a tunnel according to claim 5, characterized in that, A hand hole filler is provided in said hand hole, the filling surface of said hand hole filler is flush with the surface of the bottom plate of the first groove, and a waterproof coating is applied on the surface layer.

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