A method for integrated construction of a "straight+inclined" wall of a tunnel partition wall

Abstract

The application provides a tunnel partition wall "straight + inclined" wall integrated construction method, which comprises the following steps: measurement and lofting and steel bar pretreatment; jointing chiseling and cleaning; steel bar binding; formwork installation and reinforcement; hard and soft pipe installation; concrete pouring; concrete curing and formwork removal. According to the design drawing requirements, the application innovates a tunnel partition wall "straight + inclined" wall integrated construction method, and the partition wall "straight + inclined" wall is integrally formed by one-time pouring, which is beneficial to guarantee the finished product effect, creates a new thinking of tunnel partition wall "soft + hard" pipe concrete pouring, and the turnover materials such as wood formwork, wood block, reinforcing steel pipe and concrete pipe can be reused, thereby saving funds. The application has been applied to the field engineering and can provide certain reference experience for similar or similar engineering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel construction, in particular, relates to a tunnel partition wall "straight + inclined" wall integrated construction method. BACKGROUND

[0002] The on-site tunnel partition wall "straight + inclined" wall construction working face is small, the concrete pumping pipe is difficult to install, the formwork reinforcement effect cannot be guaranteed, the concrete pouring construction is difficult, and the concrete pumping pipe is required to be flexible, portable and easy to swing, especially the "soft + hard" concrete pumping pipe combination overcomes the problem that the on-site partition wall "straight + inclined" wall concrete pouring is difficult to construct.

[0003] The present application innovates a tunnel partition wall "straight + inclined" wall integrated construction method, the partition wall "straight + inclined" wall integrated concrete pouring adopts the "soft pipe retreat and removal" method, and has been applied to the construction site, mainly including: felt, steel bar pretreatment, formwork installation and reinforcement, soft and hard pipe combination, soft pipe groove, concrete pouring, maintenance, and formwork removal. The reinforcement system of wood blocks, reinforcing steel pipes and tension bolts ensures that the concrete does not deform and has good forming effect during the concrete pouring process. SUMMARY

[0004] In order to make up for the shortcomings of the prior art, the present application provides a tunnel partition wall "straight + inclined" wall integrated construction method. The partition wall "straight + inclined" wall is located above the lower horizontal top plate and the lower straight wall, and the lower straight wall is located above the lower foundation. For details, see the accompanying drawings.

[0005] The present application is realized by the following technical scheme: a tunnel partition wall "straight + inclined" wall integrated construction method, specifically comprising the following steps: S1, measurement and steel bar pretreatment: measurement and on-site line marking, and angle of several main force bars HRB400E is 45° upwardly inclined;

[0006] S2, chiseling and cleaning of the joint surface: the joint surface of the partition wall lower horizontal top plate and the straight wall part of the partition wall "straight + inclined" wall, and the joint surface of the inclined wall part of the partition wall "straight + inclined" wall and the tunnel secondary lining structure all need to be chiseled;

[0007] S3, steel bar binding: the main force bar adopts steel bar HRB400E, the longitudinal distribution bar is HRB400E, and the stirrup adopts HPB300; the distance between the main force bar and the distribution bar is 200mm, and the distance between the stirrups is 400*400mm; the steel bars of the partition wall "straight + inclined" wall straight wall are bound with the reserved steel bars of the lower horizontal top plate; before the steel bars in the partition wall "straight + inclined" wall inclined wall are implanted into the tunnel secondary lining structure, drilling equipment is used for drilling, and the depth is not less than 350mm; after drilling is completed, hole cleaning is performed, A-grade glue is used for implanting the steel bars, and the implanting depth is not less than 350mm;

[0008] S4, template installation, reinforcement: the template uses a 15mm thick wood adhesive plate, the surface is coated with a release agent, the total length of the template installation is 20m, the lower part of the template is paved with felt, the outer two sides of the template are first paved with square wood blocks, the outer side of the wood blocks is reinforced with double steel pipes of DN28mm carbon steel, and a tension bolt is arranged between the double reinforced steel pipes; a 300mm wide hose groove (for placing concrete pumping hoses) is left between the upper template of the partition wall and the tunnel second lining structure, and the length is 20m;

[0009] S5, concrete pumping hard and soft pipe installation: the concrete pumping hard pipe uses a DN125mm carbon steel pipe connected with a concrete pump truck; the concrete pumping soft pipe uses a DN125mm rubber hose, and the connection between the concrete pumping soft pipes and the connection between the concrete pumping hard pipes all use flange connections; the concrete pumping hard pipe is installed vertically to the pump truck, and the concrete pumping soft pipe is installed in the 300mm wide hose groove.

[0010] S6, concrete pouring: the concrete uses C35 commercial concrete, the temperature when entering the mold is not less than 5℃ and not higher than 30℃, and the concrete pouring uses the "soft pipe backward removal" pouring method; pouring starts at the farthest end of the hose groove, and a vibrating rod is used for vibration and compaction during pouring; when the hose groove at the farthest end starts to overflow with concrete, pumping is temporarily stopped, 4m of the hose is removed backward, pouring continues, the poured part is then manually smoothed, and then the hose is sequentially removed backward until pouring is completed, and finally the surface of the wet concrete is manually smoothed.

[0011] S7, concrete curing and form removal: after the concrete curing time and the design required strength are reached, the form is removed, plastic film is laid on the wet concrete surface after the form is removed, and finally the film is removed.

[0012] As a preferred scheme, the diameter of the main reinforcement HRB400E in step S1 is 14mm.

[0013] As a preferred scheme, after the chiseling is completed in step S2, cleaning is performed to ensure that the bonding surface is wet.

[0014] As a preferred scheme, the diameter of the main reinforcement HRB400E in step S3 is 14mm, the diameter of the longitudinal distribution reinforcement HRB400E is 12mm, and the diameter of the stirrup HPB300 is 8mm.

[0015] As a preferred scheme, the stirrups are arranged in a quincunx shape in step S3.

[0016] As a preferred scheme, the wood block spacing is 400mm, the reinforced steel pipe spacing is 400mm, and the tension bolt spacing is 500mm in step S4.

[0017] As a preferred solution, the length of each concrete hose in step S5 is 4m, and the hose is made of rubber, which is convenient for flexible swing.

[0018] Compared with the prior art, the tunnel partition wall "straight+oblique" wall integrated construction method has the following beneficial effects: according to the design drawing requirements, a tunnel partition wall "straight+oblique" wall integrated construction method is innovated, the tunnel partition wall "straight+oblique" wall is formed by one-time pouring, which is beneficial to guarantee the finished product effect, and a new idea of tunnel partition wall "soft+hard" pipe concrete pumping and pouring is created, the turnover materials such as wood formwork, wood block, reinforcing steel pipe and concrete pipe can be reused, and funds are saved.

[0019] Additional aspects and advantages of the application will become apparent from the following description, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood by considering the following detailed description, from which the singular aspects become evident, and particularly, when taken in conjunction with the accompanying drawings.

[0021] Figure 1 is a flowchart of the present application;

[0022] Figure 2 is a structural schematic diagram of the present application;

[0023] Figure 3 is a construction schematic diagram of the present application;

[0024] Figure 4 is a construction perspective schematic diagram of the present application. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0027] The following will be described in combination with Figures 1 to 4 The tunnel partition wall "straight+oblique" wall integrated construction method of the embodiment of the present application will be described in detail.

[0028] As Figure 1As shown, the application proposes a tunnel partition wall "straight + inclined" wall integrated construction method, which is provided with a concrete pump truck to provide power for partition wall concrete pouring; is provided with a concrete pumping hard pipe, one end of which is connected with the pump truck, and the other end is connected with a concrete pumping rubber hose to provide a vertical pumping path for the concrete; is provided with a concrete pumping rubber hose, which is connected with the concrete pumping hard pipe by flange to provide a horizontal pumping path for the concrete; is provided with a hose groove to provide a placing space for the concrete pumping rubber hose; is provided with a wooden formwork, a wooden block, a reinforcing steel pipe and a tension bolt, a protective layer is left between the wooden formwork and the reinforcing steel, the wooden block is tightly attached to the wooden formwork, the reinforcing steel pipe is tightly pressed against the wooden block, and the tension bolt tightly fastens the reinforcing steel pipe to provide a formwork reinforcing system for partition wall concrete pouring; and is provided with a lower part of the felt to avoid stains during upper concrete pouring and to protect the lower finished product.

[0029] Specifically includes the following steps:

[0030] S1, measurement and steel pretreatment: according to the design requirements, measurement and on-site line marking are carried out, a number of main reinforcement HRB400E with a diameter of 14mm are bent and treated, and the angle is 45° upwardly inclined;

[0031] S2, chiseling and cleaning of the joint surface: the joint surface of the lower horizontal top plate of the partition wall and the straight wall part of the partition wall "straight + inclined" wall, and the joint surface of the inclined wall part of the partition wall "straight + inclined" wall and the tunnel second lining structure need to be chiseled; after chiseling, cleaning is carried out to ensure that the joint surface is wet.

[0032] S3, steel binding: the main reinforcement is HRB400E, the longitudinal distribution reinforcement is HRB400E, and the stirrup is HPB300; the diameter of the main reinforcement HRB400E is 14mm, the diameter of the longitudinal distribution reinforcement HRB400E is 12mm, and the diameter of the stirrup HPB300 is 8mm. The distance between the main reinforcement and the distribution reinforcement is 200mm, and the distance between the stirrups is 400*400mm, and the stirrups are arranged in a plum blossom shape. The steel of the straight wall of the partition wall "straight + inclined" wall is bound with the steel reserved in the lower horizontal top plate; before the steel in the inclined wall of the partition wall "straight + inclined" wall is implanted into the tunnel second lining structure, drilling equipment is used for drilling, and the depth is not less than 350mm; after drilling, hole cleaning is carried out, A-grade glue is used for planting, and the planting depth is not less than 350mm;

[0033] S4 template installation, reinforcement: template adopts 15mm thick wood adhesive plate, surface is smeared with release agent, template installation total length is 20m (concrete once pouring construction section length 20m), template lower part is laid with felt, prevents upper part from falling down with sundries, affects lower part straight wall appearance, template outer two sides are laid with square wood block first, wood block outer side is reinforced with double steel pipes for DN28mm carbon steel, double reinforced steel pipes are provided with tension bolts between; wood block spacing is 400mm, reinforced steel pipe spacing is 400mm, tension bolt spacing is 500mm. 300mm wide hose groove is left between upper template of the inclined plate of the partition wall and the contact of the second lining of the tunnel, length is 20m; in order to facilitate the placement of rubber hoses.

[0034] S5, concrete hard, hose installation: concrete hard pipe adopts DN125mm carbon steel pipe, is connected with concrete pump truck; concrete hose adopts DN125mm rubber hose, length of each is 4m. Flange connection is used between the connection of the concrete hoses and the connection between the concrete hard pipes; the concrete hard pipe is installed in the vertical direction of the pump truck, the concrete hose has good bending performance, and the concrete hose is installed in the 300mm wide hose groove.

[0035] S6, concrete pouring: C35 commercial concrete is used for concrete, the temperature of the concrete into the mold is not less than 5 DEG C, the concrete is poured by using the "hose backward removal" pouring mode; pouring is started at the farthest end of the hose groove, a vibrating rod is used for vibrating and compacting during the pouring process; when the concrete just starts to overflow in the farthest end of the hose groove, pumping is paused, 3m of the hose is removed in reverse, pouring is continued, the poured part is manually smoothed to prevent the occurrence of a rough surface, then the hose is sequentially poured and removed in reverse until the pouring is completed, and finally the surface of the wet concrete is manually leveled.

[0036] S7, concrete curing and form removal: after the concrete curing time and the required design strength are reached, the form is removed, plastic film is laid on the surface of the wet concrete after the form is removed, and finally the film is removed.

[0037] In the description of the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited, and the terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "connection", "installation", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", and the like is intended to indicate that the described implementation, feature, structure, material or characteristic is included in at least one embodiment or example of the application. The illustrative representations of the above terms in the specification are not necessarily referring to the same embodiment or example. Moreover, the described implementation, feature, structure, material or characteristic can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above only is the preferred embodiment of the present application, and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A construction method of a tunnel partition wall "straight + inclined" wall integration, characterized in that ,Specifically comprising the following steps: S1, measuring, lofting and steel bar pretreatment: measuring, lofting and on-site line marking are performed, and a number of main force bars HRB400E are bent and processed with an angle of 45° obliquely upward; S2, chiseling and cleaning of the joint surface: the joint surface of the straight wall part of the "straight+oblique" wall of the partition wall and the lower horizontal top plate and the joint surface of the oblique wall part of the "straight+oblique" wall of the partition wall and the tunnel secondary lining structure need to be chiseled; after chiseling, cleaning is performed to ensure that the joint surface is wet; S3, steel bar binding: the main force bar is HRB400E, the longitudinal distribution bar is HRB400E, and the stirrup is HPB300; the distance between the main force bar and the longitudinal distribution bar is 200mm, and the distance between the stirrups is 400*400mm; the steel bars of the straight wall of the "straight+oblique" wall of the partition wall are bound with the reserved steel bars of the lower horizontal top plate; before the steel bars in the oblique wall of the "straight+oblique" wall of the partition wall are implanted into the tunnel secondary lining structure, drilling equipment is used for drilling with a depth of not less than 350mm; after drilling, hole cleaning is performed, A-grade glue is used for bar implantation, and the implantation depth is not less than 350mm; S4, template installation and reinforcement: the template is a wood-paste board with a thickness of 15mm, the surface is coated with a release agent, the total length of the template installation is 20m, felt is laid at the lower part of the template, square wood blocks are laid on the outer two sides of the template, double steel pipes with a DN28mm carbon steel are used for reinforcement on the outer side of the wood blocks, and tensioning bolts are arranged between the double steel pipes; a 300mm-wide hose groove with a length of 20m is left between the oblique wall and the tunnel secondary lining structure; S5, concrete hardening and hose installation: the concrete hard pipe is a DN125mm carbon steel pipe connected with a concrete pump truck; the concrete hose is a DN125mm rubber hose, and flanges are used for connection between the concrete hose and the concrete hard pipe; the concrete hard pipe is installed vertically, and the concrete hose is installed in the 300mm-wide hose groove; S6, concrete pouring: C35 commercial concrete is used for concrete pouring, the temperature of the concrete entering the mold is not less than 5℃, and the "hose backward removal" pouring method is used; pouring starts at the farthest end of the hose groove, a vibrating rod is used for vibration and compaction during pouring; when the concrete starts to overflow in the farthest end of the hose groove, pumping is temporarily stopped, 4m of the hose is removed backward, pouring continues, the poured part is manually smoothed, and then backward removal of the hose is sequentially performed until pouring is completed, and finally manual leveling is performed again; S7, concrete curing and form removal: after the curing time of the concrete and the design requirement strength are reached, the template is removed, plastic film is laid on the wet concrete surface after the template is removed, and finally the plastic film is removed.

2. The construction method of a "straight + inclined" wall integrated tunnel partition wall according to claim 1, characterized in that The diameter of the main force bar HRB400E in step S1 is 14mm.

3. The construction method of a "straight + inclined" wall integrated tunnel partition wall according to claim 1, characterized in that The diameter of the main force bar HRB400E in step S3 is 14mm, the diameter of the longitudinal distribution bar HRB400E is 12mm, and the diameter of the stirrup HPB300 is 8mm.

4. The construction method of a "straight + inclined" wall integrated tunnel partition wall according to claim 1, characterized in that The stirrups are arranged in a quincunx shape in step S3.

5. The construction method of a "straight + inclined" wall integrated tunnel partition wall according to claim 1, characterized in that The distance between the wood blocks is 400mm, the distance between the double steel pipes is 400mm, and the distance between the tensioning bolts is 500mm in step S4.

6. The construction method of a "straight + inclined" wall integrated tunnel partition wall according to claim 1, characterized in that The length of each concrete hose is 4m in step S5.

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