Duct piece steel die with longitudinal seam profile steel combination and circular seam pushing and fastening connector

Abstract

The utility model discloses a segment steel die with a longitudinal seam profile steel combination and a circular seam pushing and fastening joint, which relates to the technical field of segment manufacturing equipment and comprises a bottom die, two side dies and two end dies, and the two side dies and the two end dies are hinged to the periphery of the bottom die. The steel die is used for prefabricating and producing a high-performance novel duct piece comprising a longitudinal seam type steel combined mortise and tenon joint and a circular seam pushing and fastening pin joint. In the steel mould, the cambered surface of the bottom mould is flat and smooth and has no bolt hole, the end mould and the side mould are controlled to be opened and closed by the opening and closing bolt and the locking bolt, the demoulding of a duct piece is facilitated, a longitudinal seam profile steel mortise and tenon connecting piece mounting point is reserved at a specific position of the end mould, and a longitudinal seam joint can be accurately mounted on the end mould through a matched positioning block; the side molds on the two sides are designed according to a specific concave-convex tenon structure, circular seam pushing and fastening type pin connecting piece installation points are reserved, and a circular seam connector of the shield segment can be accurately pre-buried.

Description

Technical Field

[0001] The utility model belongs to the technical field of segment manufacturing equipment, and is specifically applied to a segment steel mold with a longitudinal joint steel combination and a circumferential joint push-pressing fastening joint. Background Art

[0002] The existing traditional bolted shield segments, as the permanent lining of shield tunnels, expose many disadvantages in practical engineering applications, such as low connection accuracy, weak body stiffness at the joints, difficult construction quality control, and a large amount of manual work required for assembly. Future shield tunnels have characteristics such as deep burial, long distance, and large diameter, and at the same time put forward new requirements for construction efficiency and engineering quality. The traditional bolted shield segments are gradually showing deficiencies in meeting market demands.

[0003] CN110805450B discloses a segment structure with a combined mortise and tenon and female head locking joint connection assembly. Compared with the traditional bolted joint segments, this segment structure is beneficial for automatic assembly, makes the tunnel lining beautiful, greatly improves the long-term anti-deformation ability of the tunnel, and effectively reduces structural diseases during the operation period. However, due to its combined mortise and tenon structure and the relatively complex female head locking joint structure, it has high requirements for the accuracy of the mold during casting, and there is currently no suitable casting mold for mass production. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a steel mold capable of successfully mass-producing the above-mentioned segment structure with a combined mortise and tenon and female head locking joint connection assembly.

[0005] To achieve the above object, the utility model provides a segment steel mold with a longitudinal joint steel combination and a circumferential joint push-pressing fastening joint, including a base, a bottom mold, end molds respectively connected to the left and right ends of the bottom mold in a mating manner, side molds respectively connected to the front and rear sides of the bottom mold and connected to the end molds in a mating manner, and a top cover;

[0006] The bottom mold is of an arc structure and is fixed on the base. One end of the top cover is hinged to the support seat on the base, and the other end is used for sealing connection with the tops of the end molds and the side molds; the bottom mold, the end molds, the side molds and the top cover enclose a mold cavity for casting shield segments, and a pouring gate is reserved in the middle of the top cover;

[0007] The side mold has a concave tenon structure and a convex tenon structure. The convex tenon structure is a continuous protrusion on the center mold surface of one of the side molds, and the continuous direction of the protrusion is parallel to the bottom mold. The concave tenon structure is a formed groove on the center mold surface of the other side mold that corresponds to and matches the protrusion;

[0008] There are a total of three ring joint sleeve mounting holes left at every 1 / 4 position on the center line of the continuous direction of the protrusion, and there are a total of three ring joint Y-shaped long threaded anchor bar mounting holes left at the positions corresponding to the ring joint sleeve mounting holes in the groove;

[0009] On the end die mold surface, longitudinal joint combined steel male head mounting holes and longitudinal joint combined steel female head mounting holes are symmetrically arranged with the vertical center line as the axis of symmetry;

[0010] There are two continuous first protrusions above and below the protrusion and the formed groove, and there are two continuous second protrusions above and below the longitudinal joint combined steel male head mounting holes and longitudinal joint combined steel female head mounting holes of the end die. The first protrusions and the second protrusions are connected to each other to form an annular protrusion for installing the water stop belt of the precast segment.

[0011] According to an embodiment of the present invention, the opening and closing between the top cover, the side die and the end die are controlled by opening and closing bolts and locking bolts.

[0012] According to an embodiment of the present invention, the depth-width ratios of the first protrusion and the second protrusion are both 1:8.

[0013] According to an embodiment of the present invention, there are detachable positioning blocks in both the longitudinal joint combined steel male head mounting holes and the longitudinal joint combined steel female head mounting holes. The detachable positioning blocks are used to fix the longitudinal joint combined steel male head and the longitudinal joint combined steel female joint in the longitudinal joint combined steel male head mounting holes and the longitudinal joint combined steel female head mounting holes.

[0014] Generally speaking, compared with the prior art through the above technical solutions conceived by the present invention, the following technical advantages are mainly possessed:

[0015] 1. The segment steel mold with longitudinal joint steel combination and circumferential joint push-pressing fastening joint proposed by the present invention can ensure the forming accuracy of the new shield segment with longitudinal joint steel combination mortise-tenon joint and circumferential joint push-pressing fastening pin joint.

[0016] 2. For the segment steel mold with longitudinal joint steel combination and circumferential joint push-pressing fastening joint proposed by the present invention, the longitudinal joint steel joint positioning block is a detachable movable component, which is easy to install and disassemble and convenient for segment demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the structure of the segment steel mold with longitudinal joint steel combination and circumferential joint push-pressing fastening joint of the present invention.

[0018] Figure 2 It is the top view of the structure of the segment steel mold with longitudinal joint steel combination and circumferential joint push-pressing fastening joint of the present invention.

[0019] Figure 3This is a side view of the segment steel formwork with longitudinal joint steel combinations and circumferential joint push - press fastening joints of the present utility model.

[0020] Figure 4 This is a structural diagram of the A - block positioning block of the longitudinal joint steel female joint in the segment steel formwork with longitudinal joint steel combinations and circumferential joint push - press fastening joints of the present utility model.

[0021] Figure 5 This is a structural diagram of the B - block positioning block of the longitudinal joint steel female joint in the segment steel formwork with longitudinal joint steel combinations and circumferential joint push - press fastening joints of the present utility model.

[0022] Figure 6 This is a structural diagram of the positioning block of the longitudinal joint steel male joint in the segment steel formwork with longitudinal joint steel combinations and circumferential joint push - press fastening joints of the present utility model.

[0023] Figure 7 This is an assembly effect diagram of the positioning block of the longitudinal joint steel male joint in the segment steel formwork with longitudinal joint steel combinations and circumferential joint push - press fastening joints of the present utility model.

[0024] Figure 8 This is a structural diagram of the concave - convex tenon of the side form in the segment steel formwork with longitudinal joint steel combinations and circumferential joint push - press fastening joints of the present utility model.

[0025] In all the drawings, the same reference numerals are used to represent the same elements or structures, where: 1 - bottom form; 2 - side form; 3 - end form; 4 - base; 5 - top cover. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following further elaborates on the present utility model in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in combination with the drawings in the embodiments of the present utility model.

[0028] Embodiment 1

[0029] As Figure 1 、 Figure 2 、 Figure 3As shown in the figure, this embodiment provides a segment steel mold with a longitudinal joint steel combination and a circumferential joint push-press fastening joint, which is used for prefabricating a high-performance new segment containing a longitudinal joint steel combination mortise and tenon joint and a circumferential joint push-press fastening pin joint. It includes: a bottom mold 1 fixed on a movable base 4, two end molds 2 and two side molds 3 are hinged to the bottom mold 1, the top of the bottom mold 1 is connected to a top cover 5, and the entire arc surface of the bottom mold 1 is flat, smooth and without bolt holes.

[0030] The inner structure of the side mold 3 is Figure 8 The concave-convex tenon structure shown is designed to enhance the shear resistance of the segment circumferential joint. The convex tenon structure of the side mold 3 is a continuous protrusion on the center mold surface of one of the side molds, and the continuous direction of the protrusion is parallel to the bottom mold. The concave tenon structure is a formed groove on the center mold surface of the other side mold that matches the protrusion.

[0031] One of the side molds 3 has circumferential joint sleeve installation holes at every 1 / 4 of the horizontal center line of the protrusion, a total of three; the other side mold has circumferential joint Y-shaped long threaded anchor bar installation holes at every 1 / 4 of the horizontal center line of the matching groove, a total of three. Thus, the circumferential joint sleeve and the circumferential joint Y-shaped long threaded anchor bar can be directly installed on the side mold 3 through the corresponding installation holes.

[0032] Installation holes for the male head of the longitudinal joint combined steel and the female head of the longitudinal joint combined steel are respectively horizontally symmetrically arranged at 403.5 mm on the left and right of the vertical midline of the end mold 2 surface, and can be utilized Figure 4 、 Figure 5 、 Figure 6 The longitudinal joint steel joint positioning blocks A and B shown are used to fix the male joint of the longitudinal joint steel and the female joint of the longitudinal joint steel in the corresponding installation holes of the joint respectively.

[0033] Above and below the concave-convex tenon structure of the side mold 3, that is, at 50 mm from the top and bottom of the side mold 3, first protrusions with a depth of 2.5 mm and a width of 20 mm are respectively formed. Similarly, above and below the two installation holes of the end mold, that is, at 50 mm from the top and bottom of the end mold, second protrusions with a depth of 2.5 mm and a width of 20 mm are also formed. The second protrusions are connected to the first protrusions of the side mold to form an annular protrusion, which is jointly used for the installation groove of the water stop strip of the preformed segment.

[0034] The installation process of the female joint of the longitudinal joint steel is as follows: As Figure 4 、 Figure 5 shown, the positioning block A is inserted into the inside of the female joint of the longitudinal joint steel and connected to the positioning block B. The positioning block A, the positioning block B and the female joint of the longitudinal joint steel can be fixed in the installation hole of the end mold 2.

[0035] The installation process of the male joint of the longitudinal joint steel is as follows: First, insert the male joint of the longitudinal joint steel into the installation hole, and splice through the positioning cover plate A and the positioning cover plate B as Figure 6 shown, and the splicing effect is as Figure 7As shown in the figure, the positioning cover plate can be spliced with the inner side of the end die 2 as a whole, and the longitudinal joint steel male joint is fixed in the installation hole of the end die 2.

[0036] The working process of the steel die of the present utility model is as follows: Fix the movable support 4, open the top cover 5, close the two side end dies 2 and the side die 3 and fix them. Combine and position the two pairs of longitudinal joint steel male and female joints with the positioning blocks A and B and embed them in the installation holes of the end die 2; directly embed the three circumferential joint sleeves and the three circumferential joint Y-shaped long threaded anchor bars in the installation holes of the side die 3. Lift the steel reinforcement cage into the inside of the steel die and place it on the bottom die 1. Close the top cover 5, pour the concrete into the inside of the steel die from the gap between the two top covers and vibrate it; after reaching the demoulding time, open the end die 2, the side die 3 and the top cover 5, take out the positioning block in the end die 2, finally lift the segment out of the steel die, and clean the steel die.

[0037] It is easy for those skilled in the art to understand that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A segment steel formwork with a longitudinal seam steel combination and a circumferential seam push-pressing fastening joint, characterized in that, It includes a base (4), a bottom mold (1), end molds (3) respectively connected and fitted to the left and right ends of the bottom mold (1), side molds (2) respectively connected to the front and rear sides of the bottom mold (1) and connected and fitted to the end molds (3), and a top cover (5). The bottom mold (1) is of an arc structure and fixed on the base (4). One end of the top cover (5) is hinged to a support seat on the base (4), and the other end is used for hermetically connecting to the tops of the end molds (3) and the side molds (2). The bottom mold (1), the end molds (3), the side molds (2) and the top cover enclose a mold cavity for casting shield segments, and a pouring gate is reserved in the middle of the top cover. The side mold (2) has a mortise structure and a tenon structure. The tenon structure is a continuous protrusion on the center mold surface of one of the side molds, and the continuous direction of the protrusion is parallel to the bottom mold (1). The mortise structure is a formed groove on the center mold surface of the other side mold corresponding to and matching the protrusion. On the mold surface of the end mold (3), a longitudinal joint combined steel section male head installation hole and a longitudinal joint combined steel section female head installation hole are symmetrically arranged with the vertical center line as the axis of symmetry.

2. The segment steel formwork with a longitudinal seam steel combination and a circumferential seam push-pressing fastening joint according to claim 1, characterized in that, At every 1 / 4 on the center line of the continuous direction of the protrusion, there are a total of three circumferential joint sleeve installation holes, and at the positions corresponding to the circumferential joint sleeve installation holes in the groove, there are a total of three circumferential joint Y-shaped long threaded anchor bar installation holes.

3. The segment steel formwork with a longitudinal seam steel combination and a circumferential seam push-pressing fastening joint according to claim 2, characterized in that, Above and below the protrusion and the formed groove, there are two continuous first protrusions. Above and below the longitudinal joint combined steel section male head installation hole and the longitudinal joint combined steel section female head installation hole of the end mold, there are two continuous second protrusions. The first protrusions and the second protrusions are connected to each other to form an annular protrusion for installing a preformed segment waterstop groove.

4. The segment steel formwork with a longitudinal seam steel combination and a circumferential seam push-press fastening joint according to claim 1, characterized in that, The opening and closing between the top cover (5) and the side mold (2) and the end mold (3) are controlled by opening and closing bolts and locking bolts.

5. The segment steel formwork with a longitudinal seam steel combination and a circumferential seam push-pressing fastening joint according to claim 3, characterized in that, The depth-width ratios of the first protrusions and the second protrusions are both 1:

8.

6. The segment steel formwork with a longitudinal seam steel combination and a circumferential seam push-press fastening joint according to claim 5, characterized in that, Removable positioning blocks are provided in both the longitudinal joint combined steel section male head installation hole and the longitudinal joint combined steel section female head installation hole, and the removable positioning blocks are used to fix the longitudinal joint combined steel section male head and the longitudinal joint combined steel section female joint in the longitudinal joint combined steel section male head installation hole and the longitudinal joint combined steel section female head installation hole.

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