CN112049667A - Embedding method and fixing device for tunnel secondary lining middle-buried water stop belt - Google Patents
Embedding method and fixing device for tunnel secondary lining middle-buried water stop belt Download PDFInfo
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- CN112049667A CN112049667A CN202011054948.7A CN202011054948A CN112049667A CN 112049667 A CN112049667 A CN 112049667A CN 202011054948 A CN202011054948 A CN 202011054948A CN 112049667 A CN112049667 A CN 112049667A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
Abstract
The invention relates to the technical field of tunnel excavation supporting construction, in particular to a method for embedding a secondary lining buried water stop belt in a tunnel, which comprises the steps of firstly installing a two-lining template of a current section two-lining, then bending the water stop belt from the middle part, and fixing an exposed section of the bent water stop belt on the inner side of an end template in the two-lining template to ensure that the embedded section of the water stop belt is perpendicular to the end template; and then pouring concrete into the pouring space in the two-lining template of the current section, pre-embedding the pre-embedding section in the two-lining concrete, detaching the two-lining template, disconnecting the fixing device from the end template, and reversely bending the bent exposed section through simple treatment, so that pre-embedding construction of the pre-embedding section can be completed by straightening the water stop belt, the end template is prevented from being processed by dividing into two halves due to the installation of the water stop belt, the two halves of the end template are prevented from being respectively installed when the end template is installed, the construction process of the end template is reduced, and the construction method is simpler.
Description
Technical Field
The invention relates to the technical field of tunnel excavation supporting construction, in particular to a method and a fixing device for embedding a secondary lining buried water stop belt of a tunnel.
Background
The excavation construction of the mountain expressway tunnel mostly adopts a mining method for excavation, and adopts different mining method excavation modes according to different surrounding rock types, for example, the I, II and III-grade surrounding rocks have better stability, and full-section excavation is adopted; and IV, V grade surrounding rock stability is relatively poor, adopt the mode of mechanical excavation or local blasting mostly, for example: excavating by adopting a mode of an upper step method, a lower step method, a three-step method and the like.
In the tunnel construction process, different lining types are designed according to different surrounding rocks, and in order to ensure the safety of tunnel excavation supporting operation, the secondary lining construction of the tunnel must meet the safety step distance required by the specification, and the secondary lining concrete must be constructed next to the tunnel face. The tunnel secondary lining construction is conducted along the longitudinal direction of the tunnel in a segmented mode, a middle-buried water stop belt needs to be arranged between two adjacent segments of secondary linings, the width direction of the middle-buried water stop belt is consistent along the longitudinal direction of the tunnel, and the two segments of secondary linings respectively occupy half of the width. If the width of the embedded rubber water stop is 300mm, the width of the embedded section is 150mm, and the width of the exposed section is 150mm, the current section of the secondary lining end template must be divided, installed and reinforced due to the exposed section, as shown in fig. 1: the end template 1 is a template for plugging the end of the current section, and is arranged along the annular direction of the primary support surface 3, the end template 1 is divided into a first end template 11 and a second end template 12, so that the water stop 2 can penetrate out from a gap between the first end template 11 and the second end template 12, but the first end template 11 and the second end template 12 of the construction method need to be installed and reinforced respectively, and the construction is very complex and tedious.
Disclosure of Invention
The invention aims to: aiming at the prior art, the method comprises the following steps: in the operation process of secondary lining of the tunnel, because the embedded type rubber waterstop needs to be embedded by half width at the end part of the secondary lining of the current tunnel section, the end template of the secondary lining of the tunnel section needs to be divided into two halves to adapt to installation of the rubber waterstop, so that the end template needs to be processed by half, the end template after half is also needed to be respectively installed and reinforced, and the problem of complicated construction is solved. In order to achieve the purpose, the invention adopts the technical scheme that:
a method for embedding a buried water stop in a tunnel secondary lining comprises the following steps:
A. installing a second lining template of a current section second lining; wherein the two lining templates comprise end templates;
B. bending the exposed section of the water stop belt to a preset position tightly attached to the inner side of the end template and temporarily fixing the exposed section, and fixing the embedded section of the water stop belt to the embedded position and fixing the exposed section at the preset position through a fixing device;
C. pouring concrete on the current segment;
D. and after the preset strength is reached, removing the two lining templates, releasing the exposed section and completing the pre-embedding of the water stop.
The two-lining template refers to a template for constructing two lining segments, and can be matched with an existing structure to form a pouring space, wherein the existing structure is as follows: the second lining template comprises an end template which is used for sealing the longitudinal end face of the second lining tunnel before the second lining is poured; because the two liners are constructed in a segmented mode along the longitudinal direction of the tunnel, the current segment of the two liners refers to a segment of the two liners constructed along the longitudinal direction of the tunnel. The buried water stop is used for water stop products arranged inside concrete such as concrete deformation joints, expansion joints and the like, and has the capability of adapting to the concrete expansion deformation by using the elasticity and the structural form of rubber materials. Through bending the waterstop from the middle part of width to it is fixed through fixing device, fixing device here can be an overall structure, also can be a plurality of monomer structures, through bending and fixed, fixing device can guarantee the bending state of the waterstop after being bent, need make promptly to expose the section and paste the inboard in the end template, makes the embedded section be fixed in pre-buried position, if: the fixing device can realize the fixation of the water stop by adopting the modes of bolts, gaskets and the like, after the fixation, the other side of the water stop is perpendicular to the end head template and is fixed on the end head template, and the bending state is kept; the pre-buried position is that the pre-buried section is buried in the position of the secondary lining of the tunnel, and the pre-buried section is arranged along the longitudinal direction of the tunnel; the exposed section is arranged along the transverse direction of the tunnel, and the exposed section is exposed at the end part of the second lining of the current section after the construction of the second lining of the current section is finished. Through the mode, the whole water stop belt can be arranged inside the two-lining template of the current section and fixed on the end template, after concrete is poured into a pouring space in the two-lining template of the current section, the embedded section can be pre-embedded in the concrete of the two linings, after the two-lining template is disassembled, the connection between the fixing device and the end template is disconnected, and through simple treatment, if the concrete around the exposed section is cleaned, the bent exposed section can be reversely bent, so that the embedded construction of the embedded section can be completed by straightening the water stop belt. By adopting the embedding method, the water stop is bent, the bent exposed section is fixed on the inner side of the end template, and the exposed section is reversely bent after pouring to realize the restoration of the water stop, so that the end template is prevented from being divided into two halves to be processed due to the installation of the water stop, the two halves of the end template are prevented from being respectively installed and supported when the end template is installed, the construction procedures of the end template are reduced, and the construction method is simpler.
Preferably, the fixing device comprises a first limiting section, a second limiting section and two fixing parts, the first limiting section is of an open-loop structure, one end of the first limiting section is connected with one end of the second limiting section, the other end of the first limiting section is connected with one fixing part, and the other end of the second limiting section is connected with the other fixing part;
the step B comprises the following steps:
b1: the exposed section is attached to a preset position on the inner side of the end socket template and temporarily fixed;
b2: and enabling the opening of the first limiting section to face the end head template and be sleeved outside the embedded section, installing the second limiting section corresponding to the exposed section, and then respectively connecting the two fixing parts to the end head template.
The fixing device can be an integral structure, and the whole water stop belt is directly limited and fixed through the integral structure; the water stop belt can also be limited and fixed by a plurality of small components at multiple points. The first limiting section is used for limiting the embedded section of the water stop belt and is of an open-loop structure, the notch of the open-loop structure is an opening of the open-loop structure, when the embedded section is limited through the open-loop structure, the opening of the open-loop structure faces to the end template, the embedded section is sleeved with the opening of the open-loop structure, and the embedded section can be sleeved on the outer side of the embedded section and limited; the second limiting section is used for limiting the exposed section and can be matched with the end socket template to be attached to the exposed section of the end socket template for limiting. The bent water stop belt can be limited through the first limiting section and the second limiting section, the bending state of the bent water stop belt is guaranteed, and then the fixing device is connected with the end head template through the fixing parts which are respectively connected to the first limiting section and the second limiting section. Through fixing device can cooperate the end template directly to carry on spacingly to the waterstop after bending to can be indirect will bend the waterstop is fixed on the end template, avoided directly will destroy the emergence of the condition of waterstop when the waterstop is fixed to the end template, if: the bolt penetrates through the water stop belt to be fixed and the like, so that the water stop function of the water stop belt is further guaranteed.
Preferably, the first limiting section and the second limiting section are provided with a plurality of recesses on one side for contacting the water stop, and the recesses are used for being matched with the protrusions on the water stop;
the step B comprises the following steps: the embedded section is installed on the first limiting section in a matched mode, then the exposed section is bent until the protrusion of the exposed section is matched with the recess of the second limiting section, and then the two fixing portions are fixed on the end head template.
The first limiting section and the second limiting section are processed according to the state of the bent water stop, the embedded section is installed in the first limiting section firstly, then the exposed section is bent, the first limiting section can limit the embedded section, the exposed section is convenient to bend, whether the bending angle is suitable or not can be judged according to whether the matching of the bent exposed section and the second limiting section reaches the expected value or not, so that the bending accuracy can be improved, the water stop is more accurately installed, and the water stop is favorable for using.
Preferably, the end formwork comprises a plurality of wood formworks distributed along the arch ring direction of the tunnel, gaps are formed between every two adjacent wood formworks, the fixing device is a steel bar member, and each gap is fixed by the steel bar member.
Preferably, the step of fixing the water stop by using the steel bar member at each gap sequentially comprises:
b2 a: the opening of the first limiting section of the steel bar component faces the end head template and is sleeved on the embedded section, and the second limiting section of the steel bar component is pressed on one side of the exposed section, which is far away from the end head template, so that the two fixing parts of the steel bar component penetrate through the same gap;
B2B: bending the two fixing parts to enable the two fixing parts to be tightly attached to the outer side of the end socket template;
b2 c: and plugging the gap.
When the end formworks are formed by connecting a plurality of wood formworks, the wood formworks are distributed along the arch-shaped annular direction of the tunnel, the number of the wood formworks is determined according to actual construction conditions, a gap exists between every two adjacent wood formworks, the passing of reinforcing steel bars can be guaranteed, and the size of the reinforcing steel bars is also determined according to the size of the gap between every two adjacent wood formworks. Each waterstop needs to be spacing and fixed through the fixing device of a plurality of reinforcing bar processing, through processing with the reinforcing bar fixing device, its processing is convenient, is convenient for process out the fixing device who adapts to the waterstop after bending. Meanwhile, the fixing part of the fixing device can penetrate out from the inner side of the end die to the outer side of the end die by means of the gap between the adjacent wood die plates, and the bent water stop belt is tightly pressed on the inner side of the end die plate by bending the fixing part, so that the bent water stop belt is limited and fixed, and the bent water stop belt is kept in a bent state. In this way, can avoid fixing device destroys end template and waterstop are convenient for fix the waterstop after bending on the end template, the split of end template and waterstop when being convenient for demolish the mould simultaneously. And every clearance department all will buckle the waterstop and adopt fixing device to fix, can strengthen the waterstop with joint strength between the end template guarantees the stability of waterstop state when concreting, and then improves the degree of accuracy after the installation of waterstop is accomplished. After reinforcing steel bars penetrate through gaps between the wood formworks, the gaps can generate a slurry leakage phenomenon, and the gaps between two adjacent wood formworks are subjected to leakage stoppage, so that the gaps can be filled for leakage stoppage, for example, leakage stoppage glue is adopted; the outer cover can also be used for plugging, and plugging can be carried out from the outer side of the end template. The gap between two adjacent wooden templates on the end template is plugged, so that slurry leakage during later-stage concrete pouring can be avoided, connection between the fixing part and the end template can be increased, and the construction quality of the two lining segments can be guaranteed.
Preferably, in the step B, the waterstop is sequentially bent from two sides to the middle along an arch-shaped ring of the tunnel, and the bent position of the waterstop is fixed in time by the fixing device.
The construction of waterstop divides a plurality of fixed points to be under construction, and every fixed point department needs to bend and fix the waterstop part that this fixed point corresponds, bends and fixes the waterstop through the fixed point of tunnel arch both sides earlier, realizes the preliminary installation and the fixed of whole waterstop, is convenient for construct the corresponding waterstop part in tunnel arch middle part fixed point. The mode of progressively being under construction in the middle of the adoption is followed tunnel arch both sides side, and after fixing device fixed waterstop was adopted to both sides, can provide stable installation environment for the fixed point of next waterstop, can make things convenient for the installation of the corresponding waterstop part of next fixed point, accelerate the installation rate of waterstop greatly. Meanwhile, after the water stop corresponding to each fixing point is bent to be in an appointed state, the fixing point is fixed immediately, the initial state of the bent water stop part corresponding to the fixing point can be protected, the installation accuracy of the water stop part corresponding to the fixing point is improved, and the installation accuracy of the whole water stop is further improved.
The utility model provides a bury formula waterstop fixing device in tunnel secondary lining, includes first spacing section and the spacing section of second and two fixed parts, first spacing section is the open loop structure, first spacing section one end is connected one is connected to the one end of the spacing section of second, the other end the fixed part, another is connected to the spacing section other end of second the fixed part, the fixed part is used for connecting the end template, the spacing section of second is used for restricting the waterstop and pastes the section that exposes in one side of end template tightly, first spacing section is used for the restriction the pre-buried section of waterstop makes pre-buried section is located pre-buried position.
The first limiting section is used for limiting the embedded section, is of an open-loop structure, can be sleeved outside the embedded section and limits two sides of the embedded section; the second limiting section is used for limiting the bent exposed section, can be pressed on one side of the exposed section, which is far away from the end socket template, clamps the exposed section together with the end socket template, and limits the exposed section by matching with the inner side of the end socket template; the fixing device is connected with the end socket template through fixing parts respectively connected to the first limiting section and the second limiting section; after the two fixing parts are connected with the end template, the end template and the fixing device form an L-shaped closed loop, and then the bent water stop belt is nested inside the closed loop to form limiting, so that the bending state of the bent water stop belt is guaranteed. Through fixing device can directly cooperate the end template to carry on spacingly to the waterstop after bending to can be indirect will the waterstop is fixed on the end template, has avoided fixing the condition of destroying the waterstop during the waterstop, further ensured the stagnant water function of waterstop.
Preferably, one side of the first limiting section and/or the second limiting section, which is used for contacting the water stop, is provided with a plurality of recesses, and the recesses are used for being matched with the protrusions on the water stop. The surface of the water stop belt is a surface with bulges, and the surface of the water stop belt comprises the bulges caused by the middle hole and the bulges positioned on two sides of the middle hole. The middle hole is a through hole in the middle of the water stop belt, the middle hole is generally located at a settlement joint of a building when the water stop belt is installed, the scheme refers to that the middle hole can play a role in adjusting deformation of contraction, expansion, compression and tension at the joint of two adjacent lining sections, and the surface of the water stop belt can form a semi-cylindrical bulge due to the middle hole. The first limiting section and the second limiting section are provided with the depressions, the number of the depressions is determined according to the bulges of the water stop, and the depressions are adapted to the corresponding bulges on the water stop, so that limiting protection can be formed on the water stop.
Preferably, the fixing device is a reinforcing steel bar member.
The round steel bar leftover material is bent, so that the installation is convenient.
Preferably, the diameter of the steel bar member is 6-10mm, so that the strength of the fixing device can be met, and meanwhile, the damage to the wood formwork can be greatly reduced.
Preferably, the length direction of the fixing part is matched with the arrangement direction of the embedded section, and the fixing part can penetrate through the gap of the end template and is bent to be tightly attached to the outer side of the end template.
The end template comprises a plurality of wooden templates distributed along the arch-shaped annular direction of the tunnel, and gaps are formed between every two adjacent wooden templates.
Through inciting somebody to action the length direction of fixed part with pre-buried section set up the direction adaptation, make the fixed part can pass the clearance between the adjacent plank sheathing, and then adopts the fixed part to buckle to the mode of pasting tight plank sheathing lateral surface and fix the waterstop, this kind of fixed mode is simple swift, and the later stage end template of being convenient for demolish, can reduce the construction degree of difficulty afterwards.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the embedded method of the buried water stop in the secondary lining of the tunnel, the water stop is bent and the bent water stop is fixed on the inner side of the end template, the water stop is reversely bent after pouring, the end template is prevented from being processed by dividing the water stop into two halves due to installation, the two halves of the end template are prevented from being respectively installed and supported when the end template is installed, the construction procedures of the end template are reduced, and the construction method is simpler.
2. The fixing device can limit the bent water stop belt through the first limiting section and the second limiting section matched with the end template, so as to ensure the bending state of the bent water stop belt, and then the fixing device is connected with the end template through the fixing parts respectively connected to the first limiting section and the second limiting section. Through fixing device can cooperate the end template is direct to carry on spacingly to the waterstop after bending to can be indirect will bend the waterstop fix on the end template, avoided directly will the emergence of the condition of destroying the waterstop when the waterstop is fixed to the end template has further ensured the stagnant water function of waterstop.
3. When the end template is formed by connecting a plurality of wood templates, the fixing device adopts a steel bar component. Each the waterstop needs to be spacing and fixed through the fixing device of a plurality of reinforcing bar processing, through processing with the reinforcing bar fixing device, its processing is convenient, is convenient for process out the fixing device of the waterstop after the adaptation is bent, and fixing device's fixed part can wear out to the end mould outside from the end mould inboard with the help of the clearance between the adjacent plank sheathing simultaneously to through this fixed part of bending, the waterstop after will bending compresses tightly in the end template inboard, realizes that the spacing of the waterstop after bending is fixed promptly, keeps the state of bending of the waterstop after bending. In this way, can avoid fixing device destroys end template and waterstop are convenient for fix the waterstop after bending on the end template, the split of end template and waterstop when being convenient for demolish the mould simultaneously.
Drawings
FIG. 1 is a schematic view of a prior art waterstop installation;
FIG. 1 illustrates: 1-end template; 11-a first end template; 12-a second end template; 2-water stop belt; 3-initial support surface.
FIG. 2 is a first schematic view of the fixing device according to embodiment 1;
FIG. 3 is a second schematic view of the fixing device according to embodiment 1;
FIG. 4 is a schematic view of one side of the waterstop being installed in the first limit segment of the fixture;
FIG. 5 is a schematic view of the waterstop after bending;
FIG. 6 is a schematic view of the securing device after the waterstop has been restrained;
fig. 7 is a schematic view of the water stop being fixed by the fixing device.
FIGS. 2-7 illustrate: 1-end template; 2-water stop belt; 21-embedding a section; 22-an exposed section; 3-initial support surface; 4-dishing; 51-a first spacing section; 52-a second restraint section; 53-fixed part.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
See fig. 2-7, wherein: 6-7 are top views of the left side of the tunnel showing the end forms 1 above the inner side of the two-lined form, below the outer side of the two-lined form and to the left the initial support surface 3; the embodiment provides a method for embedding a buried water stop in a tunnel secondary lining, which comprises the following steps:
a: installing a second lining template of a current section second lining; wherein the second lining template comprises an end template 1 of the current section of the second lining;
the two-lining template is a template for constructing two-lining sections, and the two-lining template for installing the current section of the two-lining is not only the installation of the two-lining template, but also the installation of steel bars and steel frames in the two-lining template. Wherein, end template 1 can adopt steel form or plank sheathing, has because of the plank sheathing: the method has the advantages that temporary processing is easier in a construction site, transportation is convenient, and the like, in the embodiment, the wood formworks are taken as an example for explanation, the end formworks 1 are a plurality of wood formworks distributed along the arch-shaped circumference of the tunnel, when the end formworks 1 are formed by connecting a plurality of wood formworks, the wood formworks are distributed along the circumference of the arch-shaped circumference of the tunnel, the number of the wood formworks is determined according to actual construction conditions, and a gap exists between every two adjacent wood formworks; in the embodiment, when the wood formwork is installed, each wood formwork does not need to be cut into two halves in order to adapt to the mode that the water stop belts 2 are longitudinally arranged along the tunnel in the construction method in the prior art, and then the two halves of the divided wood formwork are prevented from being installed and supported respectively.
After the end formwork 1 is installed, executing the following steps: bending the water stop 2 from the middle of the width to a preset position where the exposed section 22 is attached to the inner side of the end head template 1 and temporarily fixing the water stop, fixing the embedded section 21 of the water stop 2 to the embedded position through a fixing device, and fixing the exposed section 22 to the preset position;
the embedded section 21 is half of the width of the water stop 2 pre-embedded in the two lining sections, and the arrangement direction of the embedded section is the longitudinal direction of the tunnel; the pre-buried position refers to the position where the pre-buried section 21 is buried in the two lining sections; the exposed section 22 is a half of the water stop 2 which needs to be exposed out of the end part of the two lining sections after the construction of the two lining sections is finished; the preset positions are as follows: under the condition that the embedded section 21 is located at the embedded position, the exposed section 22 is bent to enable the exposed section 22 to be attached to the inner side of the end socket template 1.
And the implementation mode of the step B is determined according to the actual construction condition, in the embodiment, the water stop belt 2 is sequentially bent from two sides to the middle part along the arch-shaped annular direction of the tunnel, and the bent position of the water stop belt 2 is fixed by the fixing device in time. The construction of waterstop 2 is divided into a plurality of fixed points and is under construction, and every fixed point department needs to bend and fix the 2 parts of waterstop that this fixed point corresponds, bends and fixes waterstop 2 through the fixed point of tunnel arch both sides earlier, realizes the preliminary installation and the fixed of whole waterstop 2, is convenient for construct the corresponding 2 parts of waterstop of tunnel arch middle part fixed point. The mode of progressively being under construction in the middle of the adoption is followed tunnel arch both sides side direction, and both sides adopt fixing device to fix 2 backs of waterstop, can provide stable installation environment for the fixed point of next waterstop 2, can make things convenient for the installation of the corresponding waterstop 2 parts of next fixed point, accelerate the installation rate of waterstop 2 greatly. Meanwhile, after the water stop 2 corresponding to each fixed point is bent to be in an appointed state, the fixed point is fixed immediately, the initial state of the bent part of the water stop 2 corresponding to the fixed point can be protected, the installation accuracy of the part of the water stop 2 corresponding to the fixed point is improved, and the installation accuracy of the whole water stop 2 is further improved.
The embodiment also provides a buried waterstop fixing device for secondary lining of a tunnel, which is shown in fig. 2-5, and the fixing device is used for fixing the bent waterstop 2 on the end template 1, and the fixing device can be of an integral structure, and directly limits and fixes the whole waterstop 2 through the integral structure; the water stop 2 can also be limited and fixed by a plurality of small components at multiple points. In this embodiment, the fixing device includes a first limiting section 51, a second limiting section 52 and two fixing portions 53, the first limiting section 51 is an open-loop structure, one end of the first limiting section 51 is connected to one end of the second limiting section 52, the other end of the first limiting section 51 is connected to one of the fixing portions 53, and the other end of the second limiting section 52 is connected to the other of the fixing portions 53;
in this embodiment, fixing device adopts little component to carry out the multiple spot spacing and fixed to waterstop 2, and is specific, fixing device is the reinforcing bar component, and the size of reinforcing bar also is according to the definite of the size in clearance between two adjacent plank formworks, and this embodiment uses ordinary phi 8 round reinforcement leftover bits to bend the preparation fixing device. Specifically, the step B specifically includes the following steps:
b1: bending the water stop 2 from the middle of the width to a preset position where the exposed section 22 is attached to the inner side of the end head template 1 and temporarily fixing the water stop;
b2: the opening of the first limiting section 51 faces the end head template 1 and is sleeved on the embedded section 21, the second limiting section 52 is installed corresponding to the exposed section 22, and then the two fixing parts 53 are respectively connected to the end head template 1.
In this embodiment, each gap is fixed to the water stop 2 by the reinforcing steel member. And the method for fixing the water stop band 2 by adopting the steel bar component at each gap comprises the following steps:
b2 a: facing the opening of the first limiting section 51 of the steel bar component to the end head template 1 and sleeving the embedded section 21, and pressing the second limiting section 52 of the steel bar component on one side of the exposed section 22 far away from the end head template 1, so that the two fixing parts 53 of the steel bar component pass through the same gap;
B2B: bending the two fixing parts 53 to enable the fixing parts to be tightly attached to the outer side of the end head template 1;
b2 c: and plugging the gap.
Each waterstop 2 needs to be limited and fixed through a fixing device processed by a plurality of steel bars, the fixing device is processed by the steel bars, the fixing device is convenient to process and is adaptive to the bent waterstop 2, meanwhile, a fixing part 53 of the fixing device can penetrate out from the inner side of an end die to the outer side of the end die by means of a gap between two adjacent wood templates, the bent waterstop 2 is tightly pressed on the inner side of an end die plate 1 by bending the fixing part 53, the spacing of the bent waterstop 2 is fixed, and the bending state of the bent waterstop 2 is kept. In this way, can avoid fixing device destroys end template 1 and waterstop 2 are convenient for fix the waterstop 2 after bending on end template 1, the split of end template 1 and waterstop 2 when being convenient for demolish the mould simultaneously.
And every clearance department all will buckle waterstop 2 and adopt fixing device to fix, can strengthen waterstop 2 with joint strength between the end template 1 guarantees the stability of waterstop 2 state when concreting, and then improves the degree of accuracy after the installation of waterstop 2 is accomplished. After reinforcing steel bars penetrate through gaps between the wood formworks, the gaps can generate a slurry leakage phenomenon, and the gaps between two adjacent wood formworks are subjected to leakage stoppage, so that the gaps can be filled for leakage stoppage, for example, leakage stoppage glue is adopted; or plugging can be performed from the outer side of the end template 1 by adopting an outer covering. Through carrying out the leaking stoppage to the clearance between two adjacent plank formworks on the end template 1, can avoid leaking when later stage concreting, can increase the quality of being under construction of two liner segments simultaneously between fixed part 53 and the end template 1.
In this embodiment, the first position-limiting section 51 and/or the second position-limiting section 52 have a plurality of recesses 4 on one side contacting the water stop 2, and the recesses 4 are adapted to the protrusions on the water stop 2; as shown in fig. 2, the first position-limiting section 51 and the second position-limiting section 52 are both provided with a recess 4; as shown in fig. 3, the first position-limiting section 51 is provided with a recess 4. The step B may adopt a method of bending first and then fixing, and may also adopt the following steps: firstly, one side of the water stop 2 is mounted on the first limiting section 51 in an adaptive manner, as shown in fig. 4; then, the other side of the water stop 2 is bent until the bulge on the other side of the water stop 2 is matched with the recess 4 of the second limiting section 52, as shown in fig. 5; and then the two fixing portions 53 are fixed to the end head formwork 1, as shown in fig. 6 to 7. Because the first spacing section 51 with the spacing section 52 of second is according to the state processing after the waterstop 2 is bent, work as the spacing section 52 of second is equipped with when sunken 4, through earlier with install in the pre-buried section 21 of waterstop 2 in first spacing section 51, it is right again the waterstop 2 exposes section 22 and bends, first spacing section 51 can be right the pre-buried section 21 of waterstop 2 carries on spacingly, is convenient for expose section 22 of waterstop 2 and bends the processing, and can be according to expose section 22 after bending with whether the cooperation of the spacing section 52 of second has reached the expected value, judges whether the angle of bending is suitable, so can improve the accuracy of bending, makes the installation of waterstop 2 more accurate, is favorable to the use of waterstop 2.
And B, limiting and fixing the whole water stop belt 2 on the end head template 1 according to the construction in the step B, plugging the gap between two adjacent wood templates, and then implementing the step C: pouring concrete on the current segment; then step D is carried out: and (4) removing the two lining templates after the preset strength is reached, releasing the exposed section 22, and completing the pre-embedding of the water stop 2. When the two lining forms are removed, the end form 1 is also removed, so that not only the support of the end form 1 itself needs to be removed, but also the fixing part 53 of the fixing device needs to be bent back to the original state, so that the end form 1 can be removed.
And after the end template 1 is disassembled, releasing the exposed section 22 and straightening the water stop 2 to complete the pre-embedding of the water stop 2. When the exposed section 22 is released, because the exposed section 22 is in the end formwork 1, the poured concrete is condensed to the periphery of the exposed section 22, so that the periphery of the exposed section 22 needs to be simply cleaned and processed, and the exposed section 22 can be released and bent until straight, so that the width direction of the exposed section 22 returns to the longitudinal direction of the tunnel again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for embedding a buried water stop in a tunnel secondary lining is characterized by comprising the following steps:
A. installing a second lining template of a current section second lining; wherein the two lining templates comprise end templates (1);
B. bending an exposed section (22) of the water stop (2) to a preset position tightly attached to the inner side of the end template (1) and temporarily fixing the exposed section, fixing an embedded section (21) of the water stop (2) to the embedded position through a fixing device, and fixing the exposed section (22) at the preset position;
C. pouring concrete on the current segment;
D. and (3) removing the two lining templates after the preset strength is reached, releasing the exposed section (22) and completing the pre-embedding of the water stop (2).
2. The method for embedding the buried water stop of the secondary lining of the tunnel according to claim 1, wherein the fixing device comprises a first limiting section (51), a second limiting section (52) and two fixing parts (53), the first limiting section (51) is of an open-loop structure, one end of the first limiting section (51) is connected with one end of the second limiting section (52), the other end of the first limiting section (51) is connected with one fixing part (53), and the other end of the second limiting section (52) is connected with the other fixing part (53);
the step B comprises the following steps:
b1: the exposed section (22) is attached to a preset position on the inner side of the end head template (1) and temporarily fixed;
b2: the opening of the first limiting section (51) faces the end head template (1) and is sleeved on the outer side of the embedded section (21), the second limiting section (52) is installed corresponding to the exposed section (22), and then the two fixing parts (53) are connected to the end head template (1) respectively.
3. The method for embedding the buried water stop in the secondary lining of the tunnel according to claim 2, wherein the end formworks (1) comprise a plurality of wood formworks distributed along the arch-shaped circumference of the tunnel, gaps are formed between the adjacent wood formworks, the fixing device is a steel bar component, and the water stop (2) is fixed at each gap by the steel bar component.
4. The method for embedding the buried water stop in the secondary lining of the tunnel according to claim 3, wherein the step of fixing the water stop (2) at each gap by adopting the reinforcing steel bar member sequentially comprises the following steps:
b2 a: enabling an opening of the first limiting section (51) of the steel bar component to face the end head template (1) and be sleeved on the embedded section (21), and pressing the second limiting section (52) of the steel bar component on one side, far away from the end head template, of the exposed section (22), so that the two fixing parts (53) of the steel bar component penetrate through the same gap;
B2B: bending the two fixing parts (53) to enable the fixing parts to be tightly attached to the outer side of the end head template (1);
b2 c: and plugging the gap.
5. The method for embedding the buried water stop belt in the secondary tunnel lining according to any one of claims 1 to 4, wherein in the step B, the water stop belt (2) is sequentially bent from two sides to the middle along the arch-shaped annular direction of the tunnel, and the bent position of the water stop belt (2) is fixed by the fixing device in time.
6. The utility model provides a bury formula waterstop fixing device in tunnel secondary lining, its characterized in that includes first spacing section (51) and spacing section (52) of second and two fixed part (53), first spacing section (51) are the open loop structure, first spacing section (51) one end is connected one is connected to one end, the other end of the spacing section (52) of second fixed part (53), another is connected to the spacing section (52) other end of second fixed part (53), fixed part (53) are used for connecting end template (1), spacing section (52) of second are used for restricting waterstop (2) and paste in exposing section (22) of one side of end template (1), first spacing section (51) are used for restricting pre-buried section (21) of waterstop (2) and make pre-buried section (21) are located pre-buried position.
7. The buried waterstop fixing device for tunnel secondary lining according to claim 6, wherein the side of the first limiting section (51) and/or the second limiting section (52) for contacting the waterstop (2) is provided with a plurality of depressions (4), and the depressions (4) are used for matching with the bulges on the waterstop (2).
8. The buried water stop fixing device for secondary lining of tunnel according to claim 6, wherein the joint of the first limiting section (51) and the second limiting section (52) is an arc-shaped structure, and the joint of the second limiting section (52) and the fixing part (53) is an arc-shaped structure; the joint of the first limiting section (51) and the fixing part (53) is of an arc-shaped structure.
9. The buried waterstop fixing device for tunnel secondary lining according to any one of claims 6 to 8, wherein the fixing device is a steel bar member.
10. The tunnel secondary lining buried water stop fixing device according to claim 9, wherein the length direction of the fixing portion (53) is matched with the arrangement direction of the embedded section (21), and the fixing portion (53) can penetrate through the gap of the end formwork (1) and be bent to be attached to the outer side of the end formwork (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011054948.7A CN112049667A (en) | 2020-09-29 | 2020-09-29 | Embedding method and fixing device for tunnel secondary lining middle-buried water stop belt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011054948.7A CN112049667A (en) | 2020-09-29 | 2020-09-29 | Embedding method and fixing device for tunnel secondary lining middle-buried water stop belt |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112857299A (en) * | 2020-12-30 | 2021-05-28 | 江苏法尔胜光电科技有限公司 | Mounting method of displacement sensor for tunnel |
| CN113846701A (en) * | 2021-09-22 | 2021-12-28 | 中国一冶集团有限公司 | Method for installing and positioning middle-buried steel-edge water stop |
| CN113898383A (en) * | 2021-10-09 | 2022-01-07 | 中铁二十三局集团第四工程有限公司 | Secondary lining pouring method with rubber waterstop |
| CN116556989A (en) * | 2023-07-06 | 2023-08-08 | 中建铁路投资建设集团有限公司 | Tunnel lining structure |
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2020
- 2020-09-29 CN CN202011054948.7A patent/CN112049667A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112857299A (en) * | 2020-12-30 | 2021-05-28 | 江苏法尔胜光电科技有限公司 | Mounting method of displacement sensor for tunnel |
| CN112857299B (en) * | 2020-12-30 | 2022-10-11 | 江苏法尔胜光电科技有限公司 | Mounting method of displacement sensor for tunnel |
| CN113846701A (en) * | 2021-09-22 | 2021-12-28 | 中国一冶集团有限公司 | Method for installing and positioning middle-buried steel-edge water stop |
| CN113846701B (en) * | 2021-09-22 | 2023-01-13 | 中国一冶集团有限公司 | Method for installing and positioning middle-buried steel-edge water stop |
| CN113898383A (en) * | 2021-10-09 | 2022-01-07 | 中铁二十三局集团第四工程有限公司 | Secondary lining pouring method with rubber waterstop |
| CN116556989A (en) * | 2023-07-06 | 2023-08-08 | 中建铁路投资建设集团有限公司 | Tunnel lining structure |
| CN116556989B (en) * | 2023-07-06 | 2023-09-05 | 中建铁路投资建设集团有限公司 | Tunnel lining structure |
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