CN110552372A - Superposed cable working well top plate structure and construction method thereof - Google Patents

Superposed cable working well top plate structure and construction method thereof Download PDF

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Publication number
CN110552372A
CN110552372A CN201910864292.6A CN201910864292A CN110552372A CN 110552372 A CN110552372 A CN 110552372A CN 201910864292 A CN201910864292 A CN 201910864292A CN 110552372 A CN110552372 A CN 110552372A
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CN
China
Prior art keywords
steel
shaped
shaped steel
beams
channel
Prior art date
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Pending
Application number
CN201910864292.6A
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Chinese (zh)
Inventor
唐自强
陈孝湘
罗克伟
黄海
刘文亮
肖芬
林宇彬
刘志伟
黄晓予
张劲波
胡臻达
刘沁
武奋前
陈培铭
叶琦棽
吴勤斌
吴培贵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Fujian Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd
PowerChina Fujian Electric Power Survey and Design Institute Co Ltd
Original Assignee
State Grid Fujian Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd
PowerChina Fujian Electric Power Survey and Design Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Fujian Electric Power Co Ltd, Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd, PowerChina Fujian Electric Power Survey and Design Institute Co Ltd filed Critical State Grid Fujian Electric Power Co Ltd
Priority to CN201910864292.6A priority Critical patent/CN110552372A/en
Publication of CN110552372A publication Critical patent/CN110552372A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/12Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/125Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the lining of the shaft
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/12Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14Covers for manholes or the like; Frames for covers

Abstract

the invention relates to a roof structure and construction of a cable working well, in particular to a superposed roof structure of the cable working well and a construction method thereof, which is characterized by comprising an H-shaped steel main beam, a channel steel secondary beam, a steel plate and a poured concrete plate; two ends of each H-shaped steel main beam are respectively erected on L-shaped steps at the tops of two side walls of the cable working well, the channel steel secondary beams are positioned on the lower end surfaces of the upper flanges of the H-shaped steel main beams, two ends of each channel steel secondary beam are respectively welded with two adjacent H-shaped steel main beams, steel plates are fully paved on the channel steel secondary beams, and the steel plates are distributed in parallel to the H-shaped steel main beams; the shear steel members are welded on the upper end surfaces of the upper flanges of the H-shaped steel girders, the concrete slabs are cast in situ on the H-shaped steel girders and the full-spread steel plates, and the H-shaped steel girders are fixedly connected with cast-in-situ concrete plates through the shear steel members. The invention has the advantages that: construction convenience, construction process need not to set up the scaffold frame, can effectively shorten construction period, improve the efficiency of construction greatly to waterproof performance has been ensured. In addition, the steel support frame is fully utilized, and the stress performance of the top plate is improved.

Description

Superposed cable working well top plate structure and construction method thereof
Technical Field
The invention relates to a roof structure and construction of a cable working well, in particular to a superposed cable working well roof structure and a construction method thereof.
background
the cable structures are underground engineering, and the open cut cable structures need to be subjected to roof construction during construction, and the construction mode thereof specifically refers to a mode-stripping type roof-laminating scheme in constructional engineering and is as follows: considering the thickness of the top plate, a scaffold and other auxiliary construction measures need to be built in the working well; secondly, a prefabricated template is supported at the top of the scaffold, then a concrete top plate is poured on the prefabricated plate, the template can be detached after the top plate reaches the strength, and then the support in the well is installed and constructed. The disadvantages of the construction mode are that:
1) during construction, as the top plate is large in thickness (250 mm-400 mm) and heavy in weight, auxiliary construction measures such as scaffolds and the like need to be set up in a working well to support the weight of the cast-in-place concrete top plate in the construction process and the forming process, and the space in the working well is limited, so that the construction is inconvenient, complicated and complex, and the safety is difficult to guarantee;
2) Because the scaffold needs to be fully distributed in the whole work well, during the construction of the top plate, namely from the beginning of the scaffold below the top plate to the completion of the pouring of the top plate, other construction projects such as pipeline construction and the like cannot be carried out and can be only carried out before or after the construction of the top plate, the construction period is influenced, and the construction efficiency is reduced;
in order to solve the problem of erecting the scaffold, the construction scheme of directly hoisting the prefabricated roof is adopted in the prior art, but the defects of the scheme are as follows: after the prefabricated top plate is directly hoisted in place, gaps exist, the cable work well has higher requirements on the waterproof performance of a structure, particularly the work well after a large number of accessory facilities are laid or the work well for directly installing connectors has higher waterproof grade, but the gaps formed by the prefabricated hoisting scheme are difficult to treat due to deep depth and long gaps, so the gaps are not treated or coated with mortar generally, the problems of insufficient waterproof performance, leakage and the like frequently occur in the operation process, and the application rate is low; in addition, the prefabricated roof also brings problems in transportation, hoisting and the like due to the thickness of the prefabricated roof.
Disclosure of Invention
the invention aims to provide a superposed cable working well top plate structure and a construction method thereof, which have the advantages of convenient construction, no need of erecting a scaffold, effective construction period shortening, construction efficiency improvement and waterproof performance guarantee.
the superposed cable work well top plate structure is realized by the following ways:
A superposed roof structure of a cable working well is characterized by comprising an H-shaped steel main beam, a channel steel secondary beam, a steel plate and a poured concrete plate, wherein the tops of two side walls of the cable working well are provided with L-shaped steps; two ends of each H-shaped steel main beam are respectively erected on L-shaped steps at the tops of two side walls of the cable work well, and one H-shaped steel main beam is distributed on each L-shaped step at intervals of a set distance; the channel steel secondary beams are positioned on the lower end faces of the upper flanges of the H-shaped steel main beams, two ends of each channel steel secondary beam are respectively welded with two adjacent H-shaped steel main beams, and one channel steel secondary beam is distributed on each H-shaped steel main beam at a set distance; fully laying steel plates on the channel steel secondary beam, wherein the steel plates are distributed in parallel to the H-shaped steel main beam; the shear steel members are welded on the upper end surfaces of the upper flanges of the H-shaped steel girders, the concrete slabs are cast in situ on the H-shaped steel girders and the full-spread steel plates, and the H-shaped steel girders are fixedly connected with cast-in-situ concrete plates through the shear steel members.
The construction method of the superposed cable work well roof structure is characterized by comprising the following steps:
1) when the cable working well is constructed and excavated, the upper end parts of the side walls of the two sides of the working well are of L-shaped step structures, grooves are oppositely excavated at set intervals along the longitudinal direction of the L-shaped steps, the bottoms of the grooves are leveled by cement mortar, and waterproof treatment is carried out;
2) providing a plurality of H-shaped steel main beams, channel steel secondary beams and steel plates, wherein the H-shaped steel main beams are erected on L-shaped steps on two sides, and two ends of the H-shaped steel main beams are correspondingly embedded into grooves in the L-shaped steps respectively;
3) Laying channel steel secondary beams: the channel steel secondary beams are distributed between two adjacent H-shaped steel main beams at intervals and are positioned on the lower end faces of the upper flanges of the H-shaped steel main beams, and the upper side faces of two ends of each channel steel secondary beam are respectively welded with the lower end faces of the upper flanges of the two adjacent H-shaped steel main beams in a butt joint mode;
4) laying steel plates: the thickness of the steel plate is smaller than that of the upper flange of the H-shaped steel main beam, and the steel plate is fully paved on the upper end face of the channel steel secondary beam installed between every two adjacent H-shaped steel main beams;
5) the upper end surface of the H-shaped steel girder is welded with a shear-resistant steel member, double-layer bidirectional steel bars are bound above the steel plates,
6) and pouring a reinforced concrete plate with the thickness of more than 250mm as a top plate, and backfilling and compacting after the maintenance reaches the design strength.
Like this, construct the superimposed steel support frame by H shaped steel girder, channel-section steel secondary beam and full-spread steel sheet, and reinforced concrete board passes through shear steel member and H shaped steel girder formation rigid coupling, and whole superimposed roof structure is from top to bottom according to the preface from this: the steel reinforced concrete slab is not less than 250mm in thickness, the full-spread steel plate that is used for supporting concrete face and pours, be used for supporting steel plate and reinforced concrete slab, prevent H shaped steel girder and channel-section steel secondary beam that the work progress warp. The H-shaped steel girder is used as the center, and other superposed components are connected or fixedly connected with the steel girder, so that a superposed steel support frame capable of supporting the reinforced concrete slab with the thickness of more than 250mm in rigidity and strength is formed, and the support guarantee can be obtained in the processes of pouring the reinforced concrete slab and maintaining. The construction method is convenient to construct, a scaffold is not required to be erected in the construction process, the construction method can be synchronous with other construction projects, the construction period can be effectively shortened, the construction efficiency is greatly improved, and the waterproof performance requirement of the cable working well is met.
in addition, pour the completion back, make superimposed steel support frame and reinforced concrete slab form a whole through the shear steel member, realize the effect of the two integrated common load bearing: on one hand, the steel support frame is fully utilized and directly used as a part of the top plate structure to bear force, so that the strength and rigidity of the top plate structure of the cable work well are greatly improved, and the stress performance is improved; on the other hand, after the pouring and maintenance are completed, the process of dismantling the supporting detachable formwork is not needed, and only the ground needs to be restored after direct soil filling, so that the operation is convenient and fast, and the integral structure after pouring is not influenced.
the invention can be further embodied as follows:
the upper surfaces of two ends of the channel steel secondary beam are welded and connected with the lower end surface of the upper flange of the H-shaped steel main beam.
The channel-section steel secondary beam is used for connecting the main beam and supporting the full-spread steel plate, so that the upper surface is required to be flush during welding, and the side surface of the channel-section steel secondary beam can be welded with a web plate of the H-shaped steel main beam to ensure connection.
The shear steel component is either a stud or a channel steel.
The shear steel member is used for connecting the concrete slab and the steel support frame, and therefore needs to be welded on the main beam, so that the concrete slab and the steel support frame mainly bearing the load together.
In summary, the invention provides a superposed cable shaft roof structure and a construction method thereof, wherein an H-shaped steel main beam is used as a center and a main stress structure is adopted, a channel steel secondary beam and a full-spread steel plate are used as steel structures for supporting construction pouring reinforced concrete plates and preventing deformation in the construction process, and a shearing-resistant steel component is used for realizing common stress of a superposed steel support frame and the concrete plates and bearing load. The invention has the advantages that: construction convenience, construction process need not to set up the scaffold frame, can be synchronous with other construction works, effectively shorten construction period, improve the efficiency of construction greatly to cable worker well waterproof performance requirement has been ensured. In addition, the steel support frame can be fully utilized, the stress performance of the top plate is improved, and the construction process is simplified.
Drawings
Fig. 1 is a schematic elevation structure view of a superposed cable work well roof structure according to the present invention;
FIG. 2 is a side view of the block diagram shown in FIG. 1;
FIG. 3 is a top view of the structural diagram shown in FIG. 2 (without the steel plate and the concrete slab);
fig. 4 is an enlarged schematic view of a partial structure of the folding steel support frame of the present invention.
the present invention will be further described with reference to the following examples.
Detailed Description
The best embodiment is as follows:
Referring to the attached drawings 1-4, the top of two side walls of a superposed cable work well top plate structure is provided with L-shaped steps 1 which comprise an H-shaped steel main beam 2, a channel steel secondary beam 3, a steel plate 4 and a poured concrete plate 5; two ends of an H-shaped steel main beam 2 are respectively erected on L-shaped steps 1 at the tops of two side walls of the cable work well, and one H-shaped steel main beam 2 is distributed on each L-shaped step 1 at intervals of a set distance; the channel steel secondary beams 3 are positioned on the lower end faces of the upper flanges of the H-shaped steel main beams 2, two ends of each channel steel secondary beam are respectively welded with two adjacent H-shaped steel main beams 2, and one channel steel secondary beam 3 is distributed on each H-shaped steel main beam 2 at a set distance; fully laying steel plates 4 on the channel steel secondary beams 3, wherein the steel plates 4 are distributed in parallel to the H-shaped steel main beam 2; the shear steel members 9 (refer to attached drawing 4) are welded on the upper end surfaces of the upper flanges of the H-shaped steel girders 2, the concrete slabs 5 are cast in situ on the H-shaped steel girders 2 and the full-spread steel plates 4, and the H-shaped steel girders 2 are fixedly connected with the cast-in-situ concrete slabs 5 through the shear steel members 9. The shear steel member 9 is either a stud or a channel steel.
Referring to fig. 1-4, a construction method of a superposed cable work well roof structure includes the following steps:
1) When the cable working well is constructed and excavated, the upper end parts of the side walls of two sides of the working well are of L-shaped step structures, a groove 6 is oppositely excavated along the longitudinal direction of the L-shaped step 1 at set intervals, the bottom of the groove 6 is leveled by adopting cement mortar, and water-proof treatment is carried out by adopting micro-expansion shrinkage concrete 8;
2) Providing a plurality of H-shaped steel main beams 2, channel steel secondary beams 3 and steel plates 4, wherein the H-shaped steel main beams 2 are erected on the L-shaped steps 1 on the two sides, and the two ends of each H-shaped steel main beam are correspondingly embedded into the grooves 6 on the L-shaped steps respectively;
3) laying channel steel secondary beams: the channel steel secondary beams 3 are distributed between two adjacent H-shaped steel main beams 2 at intervals and are positioned on the lower end surfaces of the upper flanges of the H-shaped steel main beams 2, and the upper side surfaces of two ends of the channel steel secondary beams 3 are respectively welded with the lower end surfaces of the upper flanges of the two adjacent H-shaped steel main beams 2 in a butt joint mode (see the attached drawing 4);
4) Laying steel plates: the thickness of the steel plate is less than that of the upper flange of the H-shaped steel main beam 2, 3-6 mm is taken, and the steel plate is fully paved on the upper end surface of the channel steel secondary beam 3 arranged between two adjacent H-shaped steel main beams 2;
5) The upper end surface of the H-shaped steel girder 2 is welded with a shear-resistant steel member 9, a double-layer bidirectional steel bar 7 is bound above the steel plate,
6) And pouring a reinforced concrete plate with the thickness of more than 250mm as a top plate, and backfilling and compacting after the maintenance reaches the design strength.
The design points of the invention comprise:
1) the roof of cable worker well is coincide beam slab structure, from last to being down:reinforced concrete slab with thickness not less than 250mm →Full-spread steel plate → for supporting concrete slab castingthe steel channel secondary beam and the H-shaped steel main beam are used for supporting steel plates and limiting deformation in the construction process.
2) In order to support the load together with the concrete slab and the steel girder bracket, shear-resistant studs are welded to the steel girder, so that the H-beam girder serves as a structure of a compression part of the permanent roof.
3) adopt superimposed beam slab formula structure, the roof of cable worker well need not set up detachable template alone again, with template and roof two unifications.
4) During roof construction, the scaffold that need not set up in the well and the template of dismantling the recovery can realize the inside and outside simultaneous construction of well, improve work efficiency greatly.
The parts of the invention not described are the same as the prior art.

Claims (4)

1. A superposed roof structure of a cable working well is characterized by comprising an H-shaped steel main beam, a channel steel secondary beam, a steel plate and a poured concrete plate, wherein the tops of two side walls of the cable working well are provided with L-shaped steps; two ends of each H-shaped steel main beam are respectively erected on L-shaped steps at the tops of two side walls of the cable work well, and one H-shaped steel main beam is distributed on each L-shaped step at intervals of a set distance; the channel steel secondary beams are positioned on the lower end faces of the upper flanges of the H-shaped steel main beams, two ends of each channel steel secondary beam are respectively welded with two adjacent H-shaped steel main beams, and one channel steel secondary beam is distributed on each H-shaped steel main beam at a set distance; fully laying steel plates on the channel steel secondary beam, wherein the steel plates are distributed in parallel to the H-shaped steel main beam; the shear steel members are welded on the upper end surfaces of the upper flanges of the H-shaped steel girders, the concrete slabs are cast in situ on the H-shaped steel girders and the full-spread steel plates, and the H-shaped steel girders are fixedly connected with cast-in-situ concrete plates through the shear steel members.
2. The superposed cable work well roof plate structure of claim 1, wherein the upper surfaces of the two ends of the channel steel secondary beam are welded with the lower end surfaces of the upper flanges of the H-shaped steel main beams.
3. a stacked cable work well roof structure according to claim 1, wherein the shear steel members are either studs or channels.
4. The method for constructing a laminated cable work well roof structure of claim 1, comprising the steps of:
1) when the cable working well is constructed and excavated, the upper end parts of the side walls of the two sides of the working well are of L-shaped step structures, grooves are oppositely excavated at set intervals along the longitudinal direction of the L-shaped steps, the bottoms of the grooves are leveled by cement mortar, and waterproof treatment is carried out;
2) Providing a plurality of H-shaped steel main beams, channel steel secondary beams and steel plates, wherein the H-shaped steel main beams are erected on L-shaped steps on two sides, and two ends of the H-shaped steel main beams are correspondingly embedded into grooves in the L-shaped steps respectively;
3) Laying channel steel secondary beams: the channel steel secondary beams are distributed between two adjacent H-shaped steel main beams at intervals and are positioned on the lower end faces of the upper flanges of the H-shaped steel main beams, and the upper side faces of two ends of each channel steel secondary beam are respectively welded with the lower end faces of the upper flanges of the two adjacent H-shaped steel main beams in a butt joint mode;
4) laying steel plates: the thickness of the steel plate is smaller than that of the upper flange of the H-shaped steel main beam, and the steel plate is fully paved on the upper end face of the channel steel secondary beam installed between every two adjacent H-shaped steel main beams;
5) The upper end surface of the H-shaped steel girder is welded with a shear-resistant steel member, double-layer bidirectional steel bars are bound above the steel plates,
6) and pouring a reinforced concrete plate with the thickness of more than 250mm as a top plate, and backfilling and compacting after the maintenance reaches the design strength.
CN201910864292.6A 2019-09-12 2019-09-12 Superposed cable working well top plate structure and construction method thereof Pending CN110552372A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910864292.6A CN110552372A (en) 2019-09-12 2019-09-12 Superposed cable working well top plate structure and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910864292.6A CN110552372A (en) 2019-09-12 2019-09-12 Superposed cable working well top plate structure and construction method thereof

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Publication Number Publication Date
CN110552372A true CN110552372A (en) 2019-12-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111622267A (en) * 2020-05-29 2020-09-04 中国电建集团中南勘测设计研究院有限公司 Vertical shaft structure and construction method thereof
CN113338153A (en) * 2021-06-24 2021-09-03 中铁大桥勘测设计院集团有限公司 Suspension bridge anchorage front anchor chamber assembly type top cover plate and construction process
CN113482147A (en) * 2021-06-28 2021-10-08 五冶集团上海有限公司 Construction method of '0' -layer frame structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111622267A (en) * 2020-05-29 2020-09-04 中国电建集团中南勘测设计研究院有限公司 Vertical shaft structure and construction method thereof
CN113338153A (en) * 2021-06-24 2021-09-03 中铁大桥勘测设计院集团有限公司 Suspension bridge anchorage front anchor chamber assembly type top cover plate and construction process
CN113482147A (en) * 2021-06-28 2021-10-08 五冶集团上海有限公司 Construction method of '0' -layer frame structure

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