CN114215550B

CN114215550B - Tunnel secondary lining layer end template

Info

Publication number: CN114215550B
Application number: CN202111562049.2A
Authority: CN
Inventors: 付勉; 古正斌; 丁洲; 朱泰康
Original assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Current assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-12-20
Anticipated expiration: 2041-12-17
Also published as: CN114215550A

Abstract

The invention provides a tunnel secondary lining layer end template which comprises a fixing plate, an inner ring template and an outer ring template, wherein the fixing plate, the inner ring template and the outer ring template are all arched, the inner ring template is formed by splicing a plurality of first fan-shaped templates, the outer ring template is formed by splicing a plurality of second fan-shaped templates, a plurality of first bolts are arranged on the first fan-shaped templates, the first bolts sequentially penetrate through the first fan-shaped templates and the fixing plate backwards and are screwed with first nuts, each second fan-shaped template is detachably and fixedly connected to the inner ring template, a plurality of grooves are formed in the first fan-shaped templates along the outer arc surfaces of the first fan-shaped templates, screw rods are arranged in the grooves, baffle plates are fixedly arranged on the screw rods and are used for sealing the rear ends of the grooves, second nuts are screwed on the screw rods and abut against the front side surfaces of the first fan-shaped templates, fixing clamps are fixedly arranged at two ends of the screw rods, and the two fixing clamps are respectively used for clamping two edges of a medium-buried water stop. The invention can improve the seepage-proofing effect of the secondary lining layer construction joint position.

Description

Tunnel secondary lining layer end template

Technical Field

The invention belongs to the technical field of tunnel engineering, and particularly relates to a tunnel secondary lining layer end template.

Background

In the tunnel construction process, a secondary lining layer needs to be manufactured, and the secondary lining layer and the primary support layer are matched to support the tunnel together. With the advance of the construction progress, continuously deepening the sub-surface of the tunnel, and sequentially pouring secondary lining layers from the tunnel opening to the sub-surface of 30979 in a segmented mode forward. In order to prevent the leakage of the construction joint between two adjacent sections of secondary lining layers in the later use process, buried water stops need to be buried between the two adjacent sections of secondary lining layers, wherein one half of the buried water stops are located on the front side of the construction joint, and the other half of the buried water stops are located on the rear side of the construction joint.

Before pouring the secondary lining layer, a template needs to be erected, and the front end face of the secondary lining layer section, the side mold of the lining trolley, the primary supporting layer and the end template arranged at the front end of the lining trolley enclose a mold cavity of the secondary lining layer section needing to be poured. The formula waterstop of burying in half of the good secondary lining layer section front side of preparation before is located secondary lining layer mould intracavity, and buries the formula waterstop in the end template needs fixed mounting, buries the formula waterstop in half and is located the front side of end template, buries the formula waterstop in half and is located the rear side of end template, buries in the formula waterstop in being located half of burying the formula waterstop rear side and is located the die cavity on secondary lining layer. At present, in the process of pouring concrete, under the extrusion action of the concrete, a half of a middle-buried water stop positioned on the front side of a previously manufactured secondary lining section and a half of a middle-buried water stop positioned on the rear side of an end template of the secondary lining section which is being poured are easy to bend, so that the burying of the middle-buried water stop is not standard, and the anti-seepage effect is poor.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a tunnel secondary lining layer end template.

The fixing plate, the inner ring template and the outer ring template are all arched, the inner ring template is formed by splicing a plurality of first fan-shaped templates, the outer ring template is formed by splicing a plurality of second fan-shaped templates, the outer arc edge of the fixing plate is fixedly arranged at the front end of the side mold of the lining trolley, a plurality of first bolts are arranged on the first fan-shaped templates, the first bolts sequentially penetrate through the first fan-shaped templates and the fixing plate backwards and are screwed with first nuts, each second fan-shaped template is fixedly connected to the inner ring template in a detachable mode through a fixing piece, the inner ring template and the outer ring template are used for clamping a middle water stop in the middle, a plurality of grooves are distributed in the first fan-shaped templates along the outer arc surfaces of the first fan-shaped templates, screw rods are arranged in the grooves, baffle plates are fixedly arranged on the screw rods, the baffle plates are used for sealing and covering the rear ends of the grooves, second nuts are screwed on the screw rods, the second nuts abut against the front side surfaces of the first fan-shaped templates, fixing clamps are arranged at two ends of the screw rods, and two fixing clamps are used for clamping the two embedded water stop strips respectively.

Further, the fixing piece comprises a first fixing rod, a first cylinder, a second fixing rod, a second cylinder, a second bolt and a third nut, the first fixing rod is fixed on the front side face of the inner ring template, the first cylinder is fixed at the front end of the first fixing rod, the second fixing rod is fixed on the front side face of the second fan-shaped template, the second cylinder is fixed at the front end of the second fixing rod, and the screwing end of the second bolt penetrates through the first cylinder and the second cylinder in sequence and then is screwed with the third nut.

Further, the fixation clamp includes two parallel splint and connects in two connecting plates between two splint, is located inboard splint pass through the connecting rod to be fixed on the screw rod, is located the outside be equipped with the screw on the splint, the spiro union has the third bolt in the screw hole, the end of screwing in of third bolt is located between two splint.

Further, the both ends of screw rod all are equipped with the sealing strip, the sealing strip is located between two fixation clamps.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

when the tunnel secondary lining layer end template is erected, a plurality of first fan-shaped templates are sequentially installed and fixed on a fixing plate through first bolts and first nuts, and the inner ring template is formed by the plurality of first fan-shaped templates. Install the screw rod in every recess, can press from both sides tight first fan-shaped template through nut and baffle cooperation to realize that the screw rod is fixed on first fan-shaped template, make the baffle conflict at the trailing flank of first fan-shaped template when the installation screw rod, and carry out the shutoff to the rear end of recess, take place to leak thick liquid in order to prevent groove position when pouring concrete. And then installing the cut buried water stop belt, laying the buried water stop belt along the outer arc surface of the inner ring template, attaching the buried water stop belt to the outer arc surface of the inner ring template, and clamping and fixing the fixing clamps at two ends of the screw rod on the edges of two sides of the buried water stop belt respectively. Then, a plurality of second fan-shaped templates are sequentially installed and fixed on the outer side of the outer arc surface of the inner ring template through fixing parts, the plurality of second fan-shaped templates form an outer ring template, and the middle buried water stop is clamped between the outer ring template and the inner ring template. After the end formwork is erected, the fixing clamps at the two ends of the first screw rod are fixed to the two sides of the water stop respectively, the two ends of the first screw rod support the part, located on the rear side of the inner ring formwork, of the middle-buried water stop and the part, located on the front side of the inner ring formwork, of the middle-buried water stop respectively, when concrete is poured, the part, located on the rear side of the inner ring formwork, of the middle-buried water stop is not prone to being extruded and bent by the concrete, the normalization of burying of the middle-buried water stop can be improved, and the seepage prevention effect of a construction joint position can be improved. After the concrete in this section secondary lining layer section reaches certain strength and demolishs the template, half of well burying formula waterstop and screw rod is located this section secondary lining in situ, the other half of well burying formula waterstop and screw rod is located the front side on this section secondary lining layer, the fixation clamp of screw rod front end keeps the front side edge of the formula waterstop of clamping in burying, the screw rod keeps the part that the formula waterstop is located this section secondary lining layer section front side of burying to support, when pouring the next section secondary lining layer section adjacent with this section secondary lining layer, the formula waterstop of burying is difficult to be extrudeed by the concrete in half that is located this section secondary lining layer front side of burying is crooked, can improve the normalization that the formula waterstop was buried underground in the well, can improve the prevention of seepage effect of construction joint position. The end template can support the front part and the rear part of the buried water stop belt at one time, so that the buried water stop belts on two sides of a construction joint between every two adjacent secondary lining layer sections can be buried more normally, and the seepage-proofing effect of the construction joint position can be improved.

Drawings

FIG. 1 is a schematic structural diagram of a tunnel secondary lining layer end template of the invention;

FIG. 2 is an enlarged view of a in FIG. 1;

FIG. 3 isbase:Sub>A sectional view A-A of FIG. 1;

fig. 4 is a schematic structural diagram of a fixing piece in a tunnel secondary lining layer end formwork.

In the figure, 1, fixing plate; 2. a first sector template; 3. a second fan-shaped template; 4. lining the trolley side mold; 5. a first through hole; 6. a second through hole; 7. a first bolt; 8. a first nut; 9. a medium-buried water stop; 10. a groove; 11. a screw; 12. a baffle plate; 13. a second nut; 14. a first fixing lever; 15. a first cylinder; 16. a second fixing bar; 17. a second cylinder; 18. a second bolt; 19. a third nut; 20. a splint; 21. a connecting plate; 22. a connecting rod; 23. a third bolt; 24. a water stop sheet.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific drawings.

In order to clearly describe the tunnel secondary lining layer end formwork, the direction of the sub-surface of the tunnel \30979is used as the front part, and the direction of the tunnel construction entrance is used as the back part in the invention.

As shown in fig. 1 and 3, the lining trolley side form comprises a fixed plate 1, an inner ring form and an outer ring form, wherein the fixed plate 1, the inner ring form and the outer ring form are all arched, the inner ring form is formed by splicing a plurality of first fan-shaped forms 2, the outer ring form is formed by splicing a plurality of second fan-shaped forms 3, the outer arc edge of the fixed plate 1 is welded and fixed at the front end of a lining trolley side form 4, and in other embodiments, the fixed plate can be integrally formed with the front end of the lining trolley side form.

As shown in fig. 2 and 3, a plurality of first through holes 5 are formed in the first fan-shaped formwork 2, a plurality of second through holes 6 are formed in the fixing plate 1, the plurality of first through holes 5 correspond to the plurality of second through holes 6 one by one, a first bolt 7 is arranged in each first through hole 5, that is, a plurality of first bolts 7 are arranged on the first fan-shaped formwork 2, the screwing-in ends of the first bolts 7 sequentially penetrate through the first through holes 5 and the corresponding second through holes 6 and then are screwed with first nuts 8, and bolt heads of the first bolts 7 and the first nuts 8 are matched to clamp the first fan-shaped formwork 2 and the fixing plate, so that the first fan-shaped formwork 2 can be fixed on the fixing plate. Every fan-shaped template of second 3 all through the detachable fixed connection of mounting on the inner circle template, inner circle template and outer lane template are used for burying formula waterstop 9 clamp in the centre together, and inner circle template, outer lane template and the clearance between the common shutoff lining cutting platform truck side form 4's of formula waterstop 9 of burying and the first layer. A plurality of grooves 10 are distributed in the first fan-shaped template 2 along the outer arc surface of the first fan-shaped template, screw rods 11 are arranged in the grooves 10, baffle plates 12 are fixedly arranged on the screw rods 11, the baffle plates 12 are used for sealing the rear ends of the grooves 10, second nuts 13 are screwed on the screw rods 11, the second nuts 13 abut against the front side surfaces of the first fan-shaped template 2, and the baffle plates 12 can be matched with the second nuts 13 to clamp the first fan-shaped template 2 when the rear ends of the grooves 10 can be sealed, so that the screw rods 11 are fixed on the first fan-shaped template 2. And fixing clamps are fixedly arranged at two ends of the screw 11 and are respectively used for clamping two edges of the buried water stop 24.

As shown in fig. 2 and 4, the fixing member includes a first fixing rod 14, a first cylinder 15, a second fixing rod 16, a second cylinder 17, a second bolt 18 and a third nut 19, the first fixing rod 14 is fixed to the front side of the inner ring formwork, the first cylinder 15 is fixed to the front end of the first fixing rod 14, the second fixing rod 16 is fixed to the front side of the second sector formwork 3, the second cylinder 17 is fixed to the front end of the second fixing rod 16, and the screwing end of the second bolt 18 passes through the first cylinder 15 and the second cylinder 17 in sequence and then is screwed with the third nut 19. The first fixing rod 14 and the second fixing rod 16 are set to have such lengths that the bolts do not interfere with the portion of the buried water stop 9 located on the front side of the inner ring formwork when the second bolt 18 passes through the first cylinder 15 and the second cylinder 17 in this order. When the second fan-shaped template 3 is installed on the outer side of the inner ring template, the screwing end of the screw 11 sequentially penetrates through the first cylinder 15 and the second cylinder 17, then the third nut 19 is screwed on the screwing end of the screw 11, the bolt head of the second bolt 18 is abutted against the first cylinder 15, and the third nut 19 is abutted against the second cylinder 17, so that the second fan-shaped template 3 can be installed and fixed on the outer side of the inner ring template. When the second fan-shaped formwork 3 needs to be removed, the second fan-shaped formwork 3 can be removed only by unscrewing the third nut 19 from the second bolt 18 and pulling out the second bolt 18 from the second cylinder 17 and the first cylinder 15. The installation and the removal of the second fan-shaped template 3 on the inner ring template are very convenient.

As shown in fig. 2, the fixing clip includes two parallel clamping plates 20 and a connecting plate 21 connected between the two clamping plates 20, the clamping plate 20 located at the inner side is fixed on the screw rod 11 through a connecting rod 22, that is, the clamping plate 20 closer to the inner ring formwork of the two clamping plates 20 is fixed on the screw rod 11 through the connecting rod 22. The clamping plate 20 positioned at the outer side is provided with a screw hole, namely the clamping plate 20 which is closer to the primary support layer of the tunnel is provided with a screw hole. A third bolt 23 is screwed in the screw hole, and the screwing end of the third bolt 23 is positioned between the two clamping plates 20. When burying formula waterstop 9 in the clamping, the edge of burying formula waterstop 9 in is located two splint 20, rotates third bolt 23, makes the end of screwing in of third bolt 23 support tightly on burying formula waterstop 9 in, presss from both sides the tight formula waterstop of burying in between the end of screwing in of third bolt 23 and inboard splint 20 to this can carry out the clamping to burying formula waterstop 9 in the clamping, very convenient when burying formula waterstop 9 in the clamping.

As shown in fig. 2, both ends of the screw 11 are provided with water stop sheets 24, and the water stop sheets 24 are located between the two fixing clips. The water stop sheet 24 is arranged on the screw rod 11, so that water can be prevented from seeping to a construction joint on the inner side (namely, one side deviating from the primary support layer) of the middle-buried water stop through the upper side surface of the middle-buried water stop, the fixing clamp and the screw rod in sequence from the construction joint on the outer side (namely, one side facing the primary support layer) of the middle-buried water stop. The possibility of leakage at the construction joint between two adjacent secondary lining layer sections can be further reduced.

The use principle is as follows: when the tunnel secondary lining layer end template is erected, a plurality of first fan-shaped templates 2 are sequentially installed and fixed on a fixing plate 1 through first bolts 7 and first nuts 8, and the inner ring template is formed by the plurality of first fan-shaped templates 2. Install screw rod 11 in every recess 10, can press from both sides tight first fan-shaped template 2 through nut and baffle 12 cooperation to realize that screw rod 11 is fixed on first fan-shaped template 2, make baffle 12 contradict in the trailing flank of first fan-shaped template 2 when installing screw rod 11, and carry out the shutoff to the rear end of recess 10, take place to leak thick liquid in recess 10 position when preventing to pour concrete. And then installing the cut buried water stop 9, laying the buried water stop 9 along the outer arc surface of the inner ring template, attaching the buried water stop to the outer arc surface of the inner ring template, and clamping and fixing the fixing clamps at two ends of the screw 11 on two side edges of the buried water stop 9 respectively. Then, the second fan-shaped templates 3 are sequentially installed and fixed on the outer side of the outer arc surface of the inner ring template through the fixing piece, the second fan-shaped templates 3 form an outer ring template, and the buried water stop 9 is clamped between the outer ring template and the inner ring template. After the end formwork is erected, fixing clamps at two ends of the first screw 11 are fixed on two sides of the water stop respectively, two ends of the first screw 11 support the part, located on the rear side of the inner ring formwork, of the middle-buried water stop 9 and the part, located on the front side of the inner ring formwork, of the middle-buried water stop 9 respectively, when concrete is poured, the part, located on the rear side of the inner ring formwork, of the middle-buried water stop 9 is not prone to being extruded and bent by concrete, the normalization of burying of the middle-buried water stop 9 can be improved, and the seepage prevention effect of a construction joint position can be improved. And (3) when the concrete in the section of the secondary lining layer reaches certain strength and is demoulded, unscrewing a third nut 19 from a second bolt 18, and then pulling out the second bolt 18 from a second cylinder 17 and the first cylinder 15, so that the second fan-shaped template 3 can be dismantled. After the second fan-shaped formwork 3 is completely detached, the first nut 8 is screwed down from the first bolt 7, the second nut 13 is rotated on the screw rod 11, the second nut 13 moves forwards for a certain distance, the first fan-shaped formwork 2 can be detached, then the lining trolley side formwork 4 is separated from the secondary lining layer section, and the detachment of the formwork is completed. After the form is disassembled, half of the buried water stop 9 and the screw rod 11 are located in the section of the secondary lining layer, the other half of the buried water stop 9 and the screw rod 11 are located on the front side of the section of the secondary lining layer, the fixing clamp at the front end of the screw rod 11 keeps the front side edge of the buried water stop 9 clamped and fixed, the screw rod 11 keeps the part of the buried water stop 9 located on the front side of the section of the secondary lining layer to be supported, when the next section of the secondary lining layer adjacent to the section of the secondary lining layer is poured, the half of the buried water stop located on the front side of the section of the secondary lining layer is also easily extruded and bent by concrete, the normalization of the buried water stop in the buried mode can be improved, and the anti-seepage effect of the construction joint position can be improved. The end template can support the front part and the rear part of the buried water stop belt 9 at one time, so that the buried water stop belts on two sides of the construction joint between every two adjacent secondary lining layer sections can be buried more normally, and the seepage-proofing effect of the construction joint position can be improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields, and are within the scope of the present invention.

Claims

1. The utility model provides a tunnel secondary lining layer end template which characterized in that: including fixed plate, inner circle template and outer lane template, fixed plate, inner circle template, outer lane template all are the arch, the inner circle template is formed by the concatenation of the first fan-shaped template of polylith, the outer lane template is formed by the concatenation of the fan-shaped template of polylith second, the outer arc edge of fixed plate sets firmly in the front end of lining cutting platform truck side form, be equipped with a plurality of first bolts on the first fan-shaped template, first bolt passes first fan-shaped template and fixed plate back spiral shell in proper order backward and has become first nut, every the fan-shaped template of second all is through the detachable fixed connection of mounting on the inner circle template, inner circle template and outer lane template are used for jointly pressing from both sides the formula waterstop of burying in the centre, a plurality of recesses have been arranged along its cambered surface on the first fan-shaped template, be equipped with the screw rod in the recess, the baffle has set firmly on the screw rod, the baffle is used for the closing cap the rear end of recess, spiral shell has become the second nut on the screw rod, the second nut contradicts in the leading flank of first fan-shaped template, the screw rod has all set firmly the fixation clamp at the both ends of screw rod, and two fixation clamps are used for pressing from both ends of the tight formula waterstop of burying in the formula waterstop respectively, the formula waterstop of burying, the waterstop are equipped with the waterstop, the waterstop both ends of two waterstops are equipped with the two fixation clamp, are located between the waterstop, the two waterstop.

2. The tunnel secondary lining course end formwork of claim 1, wherein: the fixing piece comprises a first fixing rod, a first cylinder, a second fixing rod, a second cylinder, a second bolt and a third nut, the first fixing rod is fixed on the front side face of the inner ring template, the first cylinder is fixed at the front end of the first fixing rod, the second fixing rod is fixed on the front side face of the second fan-shaped template, the second cylinder is fixed at the front end of the second fixing rod, and the screwing-in end of the second bolt penetrates through the first cylinder and the second cylinder in sequence and then is screwed with the third nut.

3. The tunnel secondary lining course end formwork of claim 1, wherein: the fixing clamp comprises two parallel clamping plates and a connecting plate connected between the two clamping plates, the clamping plates located on the inner side are fixed on the screw rod through connecting rods, screw holes are formed in the clamping plates located on the outer side, third bolts are screwed in the screw holes, and screwing-in ends of the third bolts are located between the two clamping plates.