Secondary lining plug formwork with reserved V-shaped groove joint and construction method

Abstract

The invention discloses a secondary lining plug template with reserved V-shaped groove joints, which comprises a plurality of sections of secondary lining plug template bodies, the plurality of sections of secondary lining plug template bodies are arranged in parallel in the circumferential direction of a tunnel, each secondary lining plug template body comprises an upper end die, a lower end die and a support rod, and the upper end die and the lower end die are arranged in parallel front and back and are detachably connected through the support rod; wherein the lower end mold comprises a lower panel, an inclined plate and a second vertical plate which are sequentially connected from front to back, the rear end of the inclined plate inclines towards the outer side, a V-shaped groove joint structure is formed in the inner side of the inclined plate, a rubber strip is arranged in the V-shaped groove joint structure, and the cross section of the rubber strip is triangular; the rubber strip is used for forming a V-shaped groove joint on the second lining at the position where the rubber strip is located. By adopting the secondary lining plug template, the problem that time and labor are wasted due to the fact that secondary manual seam cutting is carried out due to poor appearance quality of an annular construction seam after a secondary lining is demoulded is effectively solved; the upper end die is divided into the independent upper sliding plate assembly and the lower sliding plate assembly, and disassembly, assembly and replacement are flexible.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel secondary lining construction, and in particular relates to a secondary lining plugging template with reserved V-shaped groove joints and a construction method. Background Art

[0002] After the formwork is removed during the construction of the tunnel secondary lining, the circumferential construction joints of the adjacent secondary linings often have different widths and poor aesthetics. In actual construction, the edges of the joints need to be manually cut a second time and then grouted, which is time-consuming and labor-intensive.

[0003] The existing telescopic polymer plugging plate is used as an upper plugging plate and is widely used in engineering projects. The lifting height of the plugging plate is generally adjusted by rotating the screw. At the same time, the plugging plate is an integrated structure. Once it is partially damaged during use, the entire plugging plate needs to be replaced, and the material recycling efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a secondary lining plugging template and a construction method with a reserved V-groove joint, which effectively solves the time-consuming and labor-intensive secondary manual cutting of the joint due to the poor appearance quality of the circumferential construction joint after the secondary lining is demoulded; the upper end mold is divided into an independent upper slide plate assembly and a lower slide plate assembly, which are flexible to disassemble and replace.

[0005] The present invention adopts the following technical scheme: a secondary lining plugging template with reserved V-shaped groove joints, comprising multiple sections of secondary lining plugging template bodies, the multiple sections of secondary lining plugging template bodies are arranged in parallel along the tunnel circumferential direction, each secondary lining plugging template body comprises: an upper end mold, a lower end mold and a support rod, the upper end mold and the lower end mold are arranged in parallel front and back, and are detachably connected through the support rod; the side of the upper end mold and the lower end mold facing the secondary lining is the inner side, and the side facing away from the secondary lining is the outer side; wherein:

[0006] The lower end mold includes, from front to back, a lower panel, an inclined plate and a second vertical plate connected in sequence, wherein the rear end of the inclined plate is inclined toward the outside, a V-shaped groove joint structure is formed on the inner side of the inclined plate, a rubber strip is arranged in the V-shaped groove joint structure, the cross section of the rubber strip is a triangle, and the vertex of the triangle is located at the frontmost part of the V-shaped groove joint structure, the bottom edge is located at the rear end, and the outer end of the bottom edge passes over the position of the lower panel; the rubber strip is used to: form a V-shaped groove joint on the second lining at its position.

[0007] Furthermore, at the front end of the lower panel, a support plate extending toward the outside is provided, and an ear plate is welded and connected to the outer side of the front part of the lower panel, and there are at least two ear plates, which are arranged at intervals along the length of the lower end mold; the front end of each ear plate is welded and connected to the rear wall surface of the support plate; the rear end of the ear plate is hingedly connected to the base, and the inner end of the base is fixedly connected to the trolley panel; the ear plate rotates radially inward and outward with the base as the support point, and is positioned and fixed when it rotates to the mold supporting position.

[0008] Furthermore, the upper end mold includes an upper slide assembly and a lower slide assembly, the lower slide assembly and the upper slide assembly are detachably connected, and the upper slide assembly and the lower slide assembly can move forward and backward.

[0009] Furthermore, the lower slide assembly includes a lower sliding panel, at the outer bottom of the lower sliding panel and at intervals along its length, a plurality of lower base plates are arranged, each lower base plate is provided with a forward lower bolt rod, and the front part of the lower bolt rod is provided with an external thread; the lower bolt rod is coaxially sleeved in a spiral sleeve and threadedly connected for connecting the upper slide assembly.

[0010] Furthermore, the upper slide plate assembly includes an upper top plate, on the inner top of the upper top plate and at intervals along its length, a plurality of upper base plates are arranged, each upper base plate is provided with a rearward upper bolt rod, the lower rear part of the upper bolt rod is provided with an external thread, and the upper bolt rod is coaxially sleeved in a spiral sleeve.

[0011] Furthermore, a plurality of lower reinforcing plates are arranged on the outer side wall of the lower sliding panel, and the plurality of lower reinforcing plates are arranged at intervals along the length direction of the lower sliding panel; a plurality of upper reinforcing plates are arranged on the outer side wall of the upper top plate, and the plurality of upper reinforcing plates are arranged at intervals along the length direction of the upper top plate; the number of the upper reinforcing plates is the same as that of the lower reinforcing plates, and their positions correspond, and the width of the upper reinforcing plates is consistent with the width of the slideway of the lower reinforcing plates; the upper reinforcing plates are inserted into the slideway.

[0012] Furthermore, a second bolt hole and a first bolt hole are spaced apart at front and rear ends on the base, and the second bolt hole and the first bolt hole correspond to the positions of the two through holes on the ear plate. The ear plate and the base are hingedly connected at the first bolt hole, and when the ear plate is rotated to the supporting formwork position, the positioning is completed by locking the second bolt hole.

[0013] The present invention also discloses a construction method of the above-mentioned secondary lining plugging template with reserved V-shaped groove joints, and the construction method comprises the following steps:

[0014] Step 1: Install the rubber strip in the V-groove joint structure, and attach the bottom of the rubber strip to the trolley panel;

[0015] Step 2: Turn the lower end mold inward as a whole through the first screw hole until it is aligned with the second screw hole, and tighten and lock it with bolts;

[0016] Step 3: Lay the embedded waterstop belt on the support plate along the circumferential direction, and adjust the spiral sleeve radially to make the lower slide assembly in the upper end mold press the embedded waterstop belt backward and the upper slide assembly press the elastic pad forward;

[0017] Step 4: After the lower end mold and the upper end mold of each segment of the whole ring are all radially tightened, the support tube is passed through the first support ear, the second support ear, and the third support ear to fix the lower end mold and the upper end mold laterally;

[0018] Step 5: When the secondary lining concrete is poured into the mold and the molding strength reaches the demoulding requirements, remove the support pipe, loosen the spiral sleeve, take down the elastic pad and the upper mold, loosen the second screw hole, and turn the lower mold freely to enter the next construction cycle.

[0019] The beneficial effects of the present invention are: 1. By setting a rubber strip with a triangular cross-section, a V-shaped annular construction joint is formed after the second lining is demoulded, and there is no need for secondary manual cutting of the joint, which saves the time for processing the joint between the second lining of each plate, effectively ensures the quality of the joint construction, and saves time and labor. 2. The upper end mold is split into an independent upper slide plate assembly and a lower slide plate assembly, and the upper slide plate assembly and the lower slide plate assembly are connected into a whole through bolt sleeves. During the turnover use, the flexibility of disassembly and replacement of components is increased, and the use efficiency is further improved. 3. The lower end mold is a steel flip template, which is not easy to deform and effectively ensures the overall rigidity of the template; in addition, the height of the lower panel can be customized according to the thickness specified by the design requirements, ensuring the position of the embedded waterstop. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view;

[0021] Figure 2 It is a circular expansion diagram;

[0022] Figure 3 It is the cross-sectional view of the lower end mold;

[0023] Figure 4 This is the circumferential development diagram of the lower panel of the lower end mold;

[0024] Figure 5 It is the cross-sectional view of the upper end mold;

[0025] Figure 6 It is a cross-sectional view of the lower slide assembly of the upper mold;

[0026] Figure 7 It is a cross-sectional view of the lower slide assembly of the upper die;

[0027] Figure 8 It is a plan view of the upper mold lower slide assembly;

[0028] Fig. 9 It is a cross-sectional view of the upper slide assembly of the upper end mold;

[0029] Fig.10 It is a cross-sectional view of the upper slide assembly of the upper end mold;

[0030] Fig.11 This is a plan view of the upper slide assembly on the upper mold.

[0031] Among them: 1. Lower end mold, 2. Upper end mold, 3. V-shaped groove structure, 4. Elastic pad, 5. First support ear, 6. Second support ear, 7. Third support ear, 8. Support pipe, 9. Trolley end, 10. Trolley panel, 11. Embedded water stop, 12. Back-mounted water stop, 1.1. Base, 1.2. Ear plate, 1.3. Lower panel, 1.4. Support plate, 1.5. First bolt, 1.6 Second bolt., 1.7. Screw hole, 2.1. Lower slide assembly, 2.2. Upper slide assembly, 2.3. Spiral sleeve, 2.1.1. Lower bottom plate, 2.1.2. Lower sliding panel, 2.1.3. Lower reinforcement plate, 2.1.4. Lower base plate, 2.1.5. Lower bolt rod, 2.2.1 Upper sliding panel, 2.2.2 Upper top plate, 2.2.3 Upper reinforcement plate, 2.2.4 Upper base plate, 2.2.5 Upper bolt rod; 3.1 Rubber strip; 3.2. Self-tapping screws. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The present invention provides a second lining plugging template with a reserved V-shaped groove joint, such as Figure 1 and 2 As shown, it includes an upper mold 2, a lower mold 1 and a support rod 8. The upper mold 2 and the lower mold 1 are arranged side by side front and back, and are detachably connected through the support rod 8; the lengths of the upper mold 2 and the lower mold 1 are consistent; the side of the upper mold 2 and the lower mold 1 facing the second lining is the inner side, and the side facing away from the second lining is the outer side.

[0034] Among them, the lower end mold 1 is arranged between the trolley panel 10 and the embedded waterstop 11, and the upper end mold 2 is arranged between the embedded waterstop 11 and the back-attached waterstop 12 of the primary lining. When the adjustment height is insufficient, a rubber pad 4 is arranged at the upper end of the upper end mold 2, and the length of the rubber pad 4 is consistent with the length of the upper end mold 2.

[0035] The lower end mold 1 includes, from front to back, a lower panel 1.3, an inclined panel, and a second vertical panel connected in sequence, wherein the inclined panel is inclined toward the outside, a V-shaped groove joint structure 3 is formed on the inner side of the inclined panel, a rubber strip 3.1 is arranged in the V-shaped groove joint structure 3, the cross section of the rubber strip 3.1 is a triangle, and the vertex of the triangle is located at the frontmost part of the V-shaped groove joint structure 3, the bottom edge is located at the rear end, and the inner end of the bottom edge passes the position where the lower panel 1.3 is located; the rubber strip 3.1 is used to: form a V-shaped groove joint at its position. The length of the rubber strip 3.1 is consistent with the length of the inclined panel.

[0036] On the inclined plate, multiple screw holes 1.7 are arranged at intervals along the length thereof, and the rubber strip 3.1 is fixed to the inclined plate by multiple self-tapping screws 3.2. The distance between two adjacent screw holes 1.7 is 150mm, and the diameter is 10mm; the bottom width of the rubber strip 3 is 40mm, and the height is 30mm. When supporting the formwork, the self-tapping screws 3.2 are inserted into the screw holes 1.7 to fix the rubber strip 3.1.

[0037] At the front end of the lower panel 1.3, a support plate 1.2 extending toward the outside thereof is provided. The support plate 1.2 is a plate body, and its length is consistent with the length of the lower panel 1.3. The lower panel 1.3 and the support plate 1.4 form an inverted L shape. The lower panel 1.3 is made of 10mm thick steel plate, and the support plate 1.4 is made of 6mm thick steel plate.

[0038] The outer side of the front part of the lower panel 1.3 is welded with an ear plate 1.2. There are at least two ear plates 1.2, which are arranged at intervals along the length of the lower end mold 1. The front end of each ear plate 1.2 is welded to the rear wall of the support plate 1.4. The ear plate 1.2 is made of 10mm thick steel plate. The ear plate 1.2 is an L-shaped plate body, and its short arm is welded to the outer side of the front part of the lower panel 1.3, and the rear part of its long arm is provided with two through holes at intervals in front and back; the rear end of the ear plate 1.2 is connected to the base 1.1. The second bolt hole 1.6 and the first bolt hole 1.5 are provided at intervals in front and back on the base 1.1. The second bolt hole 1.6 and the first bolt hole 1.5 correspond to the positions of the two through holes on the ear plate 1.2, and the second bolt hole 1.6 and the first bolt hole 1.5 have a diameter of 22mm. The ear plate 1.2 and the base 1.1 are hingedly connected at the first bolt hole 1.5, and when the ear plate 1.2 is rotated to the mold support position, the positioning is completed by locking the second bolt hole 1.6. The inner end of the base 1.1 is welded and fixed to the end of the trolley. The installation of the rubber strip 3.2 should be completed before the lower end mold 1 is flipped and positioned.

[0039] like Figure 5 As shown, the upper end mold 2 includes an upper slide assembly 2.2 and a lower slide assembly 2.1 which are detachably connected, and the upper slide assembly 2.2 and the lower slide assembly 2.1 can move forward and backward to change the front and rear width of the upper end mold 2. The upper slide assembly 2.2 and the lower slide assembly 2.1 are connected as a whole by bolt sleeves 2.3 and arranged in sections along the tunnel annular direction, each section being 650-700 mm.

[0040] like Figure 6-8As shown, the lower slide assembly 2.1 is made of plastic material, including a lower sliding panel 2.1.2, and multiple lower base plates 2.1.4 are arranged at intervals along the length of the lower sliding panel 2.1.2 at the outer bottom of the lower sliding panel 2.1.2, and each lower base plate 2.1.4 is provided with a lower bolt rod 2.1.5 facing upward and forward, and the front part of the lower bolt rod 2.1.5 is provided with an external thread; the lower end of the lower sliding panel 2.1.2 is connected to the lower base plate 2.1.1 arranged vertically therewith, and the lower base plate 2.1.1 extends toward the inside, and the length of the lower base plate 2.1.1 is consistent with the length of the lower sliding panel 2.1.2. Multiple lower reinforcing plates 2.1.3 are arranged on the outer side wall of the lower sliding panel 2.1.2, and the multiple lower reinforcing plates 2.1.3 are arranged at intervals along the length of the lower sliding panel 2.1.2, and the lower rear end of each lower reinforcing plate 2.1.3 extends to the side wall of the lower base plate 2.1.1. The lower bolt rod 2.1.5 is a steel screw with a diameter of 22 mm and is fixedly mounted on the lower base plate 2.1.4. Each lower reinforcing plate 2.1.3 includes two plate bodies spaced apart on the left and right, and a slideway is formed between the two plate bodies.

[0041] like Figure 9-11 As shown, the upper slide assembly 2.2 is made of plastic material, including an upper top plate 2.2.2, and a plurality of upper base plates 2.2.4 are arranged at intervals on the inner top of the upper top plate 2.2.2 and along its length, and each upper base plate 2.2.4 is provided with a rearward upper bolt rod 2.2.5, and the rear part of the upper bolt rod 2.2.5 is provided with an external thread; the upper top of the upper top plate 2.2.2 is connected with an upper sliding panel 2.2.1 arranged vertically therewith, and the upper sliding panel 2.2.1 extends toward the inside, and the length of the upper sliding panel 2.2.1 is consistent with the length of the upper top plate 2.2.2. A plurality of upper reinforcing plates 2.2.3 are arranged on the outer side wall of the upper top plate 2.2.2, and the plurality of upper reinforcing plates 2.2.3 are arranged at intervals along the length of the upper top plate 2.2.2. The number of the upper reinforcing plates 2.2.3 and the lower reinforcing plates 2.1.3 are the same and their positions are corresponding. The width of the upper reinforcing plates 2.2.3 is consistent with the width of the slideway of the lower reinforcing plates 2.1.3. The upper bolt rod 2.2.5 is a steel screw with a diameter of 22 mm.

[0042] The lower sliding panel 2.1.2 and the upper top plate 2.2.2 are stacked inside and outside, and the lower bolt rod 2.1.5 and the upper bolt rod 2.2.5 are coaxially sleeved in the spiral sleeve 2.3. The inner wall of the spiral sleeve 2.3 is provided with an internal thread, which is threadedly connected with the lower bolt rod 2.1.5 and the upper bolt rod 2.2.5. And each upper reinforcing plate 2.2.3 is inserted into the slideway at the corresponding position. The upper top plate 2.2.2 and the lower sliding panel 2.1.2 can slide up and down to obtain upper end molds 2 of different widths. The lower bolt rod 2.1.5 adopts a steel screw with a diameter of 22mm. In order to meet the requirements of different telescopic heights, the upper bolt rod 2.2.5, the lower bolt rod 2.1.5 and the spiral sleeve 2.3 of different lengths can be replaced. In order to facilitate the rotation and telescoping of the spiral sleeve 2.3, a corresponding screw wrench can be equipped.

[0043] The present invention also discloses a construction method of a secondary lining plugging template with a reserved V-groove joint, the construction method comprising the following steps:

[0044] Step 1: Install the rubber strip 3.1 in the V-groove joint structure 3, and attach the bottom of the rubber strip 3.1 to the trolley panel;

[0045] Step 2: Turn the lower end mold 1 inward as a whole through the first screw hole 1.5 until it is aligned with the second screw hole 1.6, and tighten and lock it with bolts;

[0046] Step 3: Lay the embedded water stop belt 11 on the support plate 1.4 along the circumferential direction, and adjust the spiral sleeve 2.3 radially to make the lower slide assembly 2.1 in the upper end mold 2 press the embedded water stop belt 11 backward and the upper slide assembly 2.2 press the elastic pad 4 forward;

[0047] Step 4: After the lower end mold 1 and the upper end mold 2 of all segments of the entire ring are all radially tightened, the support tube 8 is passed through the first supporting ear 5, the second supporting ear 6, and the third supporting ear 7 to laterally fix the lower end mold 1 and the upper end mold 2; the first supporting ear 5, the second supporting ear 6, and the third supporting ear 7 are all plates, the inner ends of the second supporting ear 6 and the third supporting ear 7 are welded to the trolley template 8, and the inner end of the first supporting ear 5 is welded to the outer side of the upper end mold 2.

[0048] Step 5: When the secondary lining concrete is poured into the mold and the molding strength reaches the demoulding requirement, remove the support pipe 8, loosen the spiral sleeve 2.3, remove the elastic pad 4 and the upper mold 2, and then loosen the second screw hole 1.6 to achieve free flipping of the lower mold 1 and enter the next cycle of construction.

Claims

1. A secondary lining plugging template with reserved V-groove joints, characterized in that: The invention comprises a plurality of sections of secondary lining plugging template bodies, wherein the plurality of sections of the secondary lining plugging template bodies are arranged in parallel along the tunnel circumferential direction, and each of the secondary lining plugging template bodies comprises: an upper end mold (2), a lower end mold (1) and a support rod (8), wherein the upper end mold (2) and the lower end mold (1) are arranged in parallel front and back and are detachably connected via the support rod (8); the side of the upper end mold (2) and the lower end mold (1) facing the secondary lining is the inner side, and the side facing away from the secondary lining is the outer side; wherein: The lower end mold (1) comprises, from front to back, a lower panel (1.3), an inclined panel, and a second vertical panel connected in sequence, wherein the rear end of the inclined panel is inclined toward the outside, a V-shaped groove joint structure (3) is formed on the inner side of the inclined panel, a rubber strip (3.1) is arranged in the V-shaped groove joint structure (3), the cross section of the rubber strip (3.1) is a triangle, the vertex of the triangle is located at the frontmost part of the V-shaped groove joint structure (3), the bottom edge is located at the rear end, and the outer end of the bottom edge passes over the position where the lower panel (1.3) is located; the rubber strip (3.1) is used to form a V-shaped groove joint on the second lining at its position.

2. A secondary lining plugging template with reserved V-shaped groove joints as claimed in claim 1, characterized in that: A support plate (1.2) extending toward the outside of the lower panel (1.3) is provided at the front end thereof, and an ear plate (1.2) is welded to the outside of the front portion of the lower panel (1.3), and there are at least two ear plates (1.2) which are arranged at intervals along the length of the lower end mold (1); the front end of each ear plate (1.2) is welded to the rear wall surface of the support plate (1.4); the rear end of the ear plate (1.2) is hingedly connected to a base (1.1), and the inner end of the base (1.1) is fixedly connected to the trolley panel (10); the ear plate (1.2) rotates radially inward and outward with the base (1.1) as a support point, and is positioned and fixed when it rotates to the mold support position.

3. A secondary lining plugging template with reserved V-shaped groove joints as claimed in claim 2, characterized in that The upper end mold (2) comprises an upper slide assembly (2.2) and a lower slide assembly (2.1); the lower slide assembly (2.1) and the upper slide assembly (2.2) are detachably connected; and the upper slide assembly (2.2) and the lower slide assembly (2.1) are movable forward and backward.

4. A secondary lining plugging template with reserved V-groove joints as claimed in claim 3, characterized in that: The lower slide assembly (2.1) comprises a lower sliding panel (2.1.2), and a plurality of lower base plates (2.1.4) are arranged at intervals at the outer bottom of the lower sliding panel (2.1.2) and along its length, and each of the lower base plates (2.1.4) is provided with a forward-facing lower bolt rod (2.1.5), and the front part of the lower bolt rod (2.1.5) is provided with an external thread; the lower bolt rod (2.1.5) is coaxially sleeved in a spiral sleeve (2.3) and threadedly connected, so as to be connected to the upper slide assembly (2.2).

5. A secondary lining plugging template with reserved V-groove joints as claimed in claim 4, characterized in that: The upper slide assembly (2.2) comprises an upper top plate (2.2.2), on the inner top of the upper top plate (2.2.2), a plurality of upper base plates (2.2.4) are arranged at intervals along the length thereof, each of the upper base plates (2.2.4) is provided with a rearward upper bolt rod (2.2.5), the lower rear portion of the upper bolt rod (2.2.5) is provided with an external thread, and the upper bolt rod (2.2.5) is coaxially sleeved in the spiral sleeve (2.3).

6. A secondary lining plugging template with reserved V-groove joints as claimed in claim 5, characterized in that: A plurality of lower reinforcing plates (2.1.3) are arranged on the outer side wall of the lower sliding panel (2.1.2), and the plurality of lower reinforcing plates (2.1.3) are arranged at intervals along the length direction of the lower sliding panel (2.1.2); a plurality of upper reinforcing plates (2.2.3) are arranged on the outer side wall of the upper top plate (2.2.2), and the plurality of upper reinforcing plates (2.2.3) are arranged at intervals along the length direction of the upper top plate (2.2.2); the number of the upper reinforcing plates (2.2.3) and the lower reinforcing plates (2.1.3) are the same, and the positions are corresponding, and the width of the upper reinforcing plates (2.2.3) is consistent with the width of the slideway of the lower reinforcing plates (2.1.3); the upper reinforcing plates (2.2.3) are inserted into the slideway.

7. A secondary lining plugging template with reserved V-groove joints as claimed in claim 6, characterized in that: The base (1.1) is provided with a second bolt hole (1.6) and a first bolt hole (1.5) spaced apart from each other in the front and rear, the second bolt hole (1.6) and the first bolt hole (1.5) correspond to the positions of the two through holes on the ear plate (1.2), the ear plate (1.2) and the base (1.1) are hingedly connected at the first bolt hole (1.5), and when the ear plate (1.2) is rotated to the formwork position, the positioning is completed by locking the second bolt hole (1.6).

8. A construction method for a secondary lining plugging formwork with reserved V-groove joints as claimed in any one of claims 1 to 7, characterized in that: The construction method comprises the following steps: Step 1: Install the rubber strip (3.1) in the V-groove joint structure (3), and attach the bottom of the rubber strip (3.1) to the trolley panel; Step 2: Turn the lower end mold (1) inward as a whole through the first screw hole (1.5) until it is aligned with the second screw hole (1.6), and tighten and lock it with bolts; Step 3: Lay the embedded water stop belt (11) on the support plate (1.4) along the circumferential direction, and adjust the spiral sleeve (2.3) radially so that the lower slide assembly (2.1) in the upper end mold (2) presses the embedded water stop belt (11) backward and the upper slide assembly (2.2) presses the elastic pad (4) forward; Step 4: After the lower end mold (1) and the upper end mold (2) of all segments of the entire ring are all radially tightened, the support tube (8) is passed through the first support ear (5), the second support ear (6), and the third support ear (7) to laterally fix the lower end mold (1) and the upper end mold (2); Step 5: When the secondary lining concrete is poured into the mold and the molding strength reaches the demoulding requirement, remove the support pipe (8), loosen the spiral sleeve (2.3), remove the elastic pad (4) and the upper mold (2), and then loosen the second screw hole (1.6) to achieve free flipping of the lower mold (1) and enter the next cycle of construction.

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