CN113914682A - Prefabricated cavity column assembly type column type maintenance pit and construction method thereof - Google Patents
Prefabricated cavity column assembly type column type maintenance pit and construction method thereof Download PDFInfo
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- CN113914682A CN113914682A CN202111132378.3A CN202111132378A CN113914682A CN 113914682 A CN113914682 A CN 113914682A CN 202111132378 A CN202111132378 A CN 202111132378A CN 113914682 A CN113914682 A CN 113914682A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
- E04H5/06—Pits or building structures for inspection or services
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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Abstract
The invention discloses a prefabricated cavity column assembly type column type maintenance pit which comprises a prefabricated short column, a bottom plate and a hidden beam, wherein the prefabricated short column is provided with a cavity with an opening at the lower end, a track embedded part is embedded in the upper end of the prefabricated short column, and a first steel bar penetrates through the lower section of the prefabricated short column; a plurality of prefabricated column bottom areas which are longitudinally arranged along the rail at intervals, second steel bars which are pre-embedded on the prefabricated column bottom areas and can extend into the cavities of the prefabricated short columns and third steel bars which are pre-embedded on the longitudinal side areas of the prefabricated column bottom areas are arranged on the two transverse sides of the bottom plate; the prefabricated short column is arranged on the bottom area of the prefabricated short column, and concrete for connecting the first steel bar and the second steel bar is poured in a cavity of the prefabricated short column; the hidden beams are poured on the longitudinal two side areas of the prefabricated column bottom area, and steel reinforcement cages for connecting the first steel reinforcement and the third steel reinforcement are arranged in the hidden beams. The invention also discloses a construction method of the maintenance pit. The invention has the advantages of convenient construction, short construction period, high standardization degree, high connection strength and high overall precision.
Description
Technical Field
The invention belongs to the field of train maintenance facilities, and particularly relates to a prefabricated cavity column assembly type column type maintenance pit and a construction method thereof.
Background
The column type maintenance pit is a necessary train maintenance facility in the urban rail transit field. At present, the cast-in-place column type maintenance pit is the construction form of the column type maintenance pit with the widest domestic application range.
The construction method commonly used at present for the traditional cast-in-place column type overhaul pits is as follows:
firstly, pouring a bottom plate and a hidden beam of the inspection pit, and reserving short column reinforcing steel bars of the inspection pit. In the short column pouring process, a positioning steel rail is required to be erected along the track direction, a track embedded part at the top of a short column of the inspection pit is buckled on the positioning steel rail, a formwork is arranged around a reserved steel bar of the short column to pour concrete, the track embedded part and the short column are poured together, and after the short column reaches the designed strength, the formwork is removed and the steel rail is positioned.
The traditional cast-in-place column type inspection pits are large in number, so that pouring is needed in multiple times, multiple reservation is needed, the construction steps are complex, and the requirement on construction precision is high. The following disadvantages are exposed in the past:
(1) the steel bars in the short columns are dense, the distance between the short columns is small, the field operation space is limited, the on-site steel bars are difficult to bind, and the construction is inconvenient.
(2) Because the short column is small in size and needs to be constructed by using a metal template, the phenomenon of die running is easily caused, the concrete forms honeycombs, exposed stones and the like, and the engineering quality is influenced.
(3) Because the upper portion need lay the track, the plane location and the high location requirement of short column are high, and the bottom plate is big with the reservation longitudinal reinforcement plane location degree of difficulty of short column, the positioning deviation appears easily, leads to needing to plant the muscle again in order to solve the deviation problem.
(4) Because the short column construction precision control degree of difficulty is big, the phenomenon that the reinforcing bar length is not enough easily takes place, makes the top of the column concrete protective layer too thick, and then leads to the splitting of track built-in fitting lower column cap during the use.
(5) The supplementary board of burying of post top fastener is difficult to pour closely knit down the concrete, appears hollowing easily, needs the secondary to repair the square joint strength who can guarantee fastener and short post.
(6) The construction process is complicated and the construction period is long.
Disclosure of Invention
The purpose of the invention is: the prefabricated cavity column assembly type column type maintenance pit and the construction method thereof are convenient to construct, short in construction period, high in standardization degree, high in connection strength and high in overall precision.
In order to solve the technical problems, the invention provides a prefabricated cavity column assembly type column type maintenance pit, which comprises a prefabricated short column, a bottom plate and a hidden beam, wherein the prefabricated short column is provided with a cavity with an opening at the lower end, a track embedded part is embedded in the upper end of the prefabricated short column, a first steel bar penetrates through the lower section of the prefabricated short column, and the first steel bar longitudinally extends out from two opposite side surfaces of the prefabricated short column along a track; the transverse two sides of the bottom plate are provided with a plurality of prefabricated column bottom areas which are longitudinally arranged along a rail at intervals, second steel bars which are pre-embedded on the prefabricated column bottom areas and can extend into cavities of the prefabricated short columns, and third steel bars which are pre-embedded on the longitudinal two side areas of the prefabricated column bottom areas, and the second steel bars and the third steel bars extend out of the surface of the bottom plate along the direction perpendicular to the rail; the prefabricated short column is vertically arranged on the bottom area of the prefabricated short column, and concrete for connecting the first steel bar and the second steel bar is poured in a cavity of the prefabricated short column; the hidden beam is poured on the longitudinal two side areas of the prefabricated column bottom area, a reinforcement cage is arranged in the hidden beam, and the reinforcement cage is connected with the first reinforcement and the third reinforcement respectively.
As a preferable scheme of the prefabricated cavity column assembly type column type maintenance pit, a plurality of reinforcement penetrating holes for penetrating and connecting the first reinforcements are formed in the lower section of the prefabricated short column, and the reinforcement penetrating holes are communicated with the cavity of the prefabricated short column.
As the preferable scheme of the prefabricated cavity column assembly type column type maintenance pit, the side wall of the cavity of the prefabricated short column is provided with a pouring hole for pouring concrete into the cavity of the prefabricated short column.
The second aspect of the invention provides a construction method of a prefabricated cavity column assembly type column type maintenance pit, which comprises the following steps:
and 7, installing the hidden beam template and pouring concrete to form the hidden beam, so that the hidden beam, the bottom plate and the prefabricated short column form a whole.
As a preferable scheme of the construction method of the prefabricated cavity column assembly type column type overhaul pit, in the step 1, first positioning angle steels are respectively embedded at the same height on the two transverse sides of the prefabricated short column.
As a preferred scheme of the construction method of the prefabricated cavity column assembly type column type overhaul pit, the column cap elevation leveling device comprises second positioning angle steel and a jacking driving unit, the second positioning angle steel is longitudinally arranged along the track, and the two longitudinal ends of the second positioning angle steel are respectively connected with the jacking driving unit;
use when column cap elevation levelling device carries out column cap elevation adjustment to many prefabricated short columns, at the below position of the first location angle steel of the horizontal both sides of many vertical same-row prefabricated short columns respectively the level erect a second location angle steel to through jacking drive unit drive second location angle steel and the laminating of first location angle steel, drive many prefabricated short columns simultaneously and go up and down to realize the adjustment of column cap elevation.
As the preferable scheme of the construction method of the prefabricated cavity column assembly type column type overhaul pit, the jacking driving unit is a manual jack, an electric jack or a hydraulic jack.
As a preferable scheme of the construction method of the prefabricated cavity column assembly type column type maintenance pit, in the step 3, at least a 20mm gap is reserved between the prefabricated short column and the bottom plate.
Compared with the prior art, the prefabricated cavity column assembly type column type maintenance pit and the construction method thereof have the beneficial effects that:
(1) the novel column type maintenance pit structure system of the cast-in-place hidden beam and the prefabricated short column is adopted to replace the traditional cast-in-place method, so that the construction difficulty of the column type maintenance pit is reduced, and the construction efficiency of the column type maintenance pit is improved; meanwhile, the prefabricated short column manufactured in a factory prefabricating mode can greatly improve the production quality and efficiency of the column member and effectively avoid the mold running phenomenon generated by the cast-in-place upright column.
(2) According to the embodiment of the invention, the prefabricated short column is optimized into the cavity column, so that on the premise of meeting the strength requirement of the short column, the weight of the prefabricated short column is reduced, the transportation and installation of the prefabricated short column are facilitated, meanwhile, the second steel bars on the bottom plate can extend into the cavity of the prefabricated short column, the precision requirement is looser compared with a cast-in-place scheme, the steel bars can be prevented from being planted again to a great extent, and the problem of difficulty in binding the steel bars on site is solved.
(3) According to the invention, through the integral prefabrication of the prefabricated short column and the track embedded part, the connection strength and the integral accuracy of the prefabricated short column and the track embedded part at the top end of the prefabricated short column can be ensured at one time, the quality and the standardization level of the prefabricated short column and the embedded part thereof are obviously improved, the length of the vertical steel bar in the prefabricated short column can be better controlled, the phenomenon that the thickness of the column top protective layer is too large is effectively avoided, and the problems that column head splitting occurs in the use process due to the fact that the cast-in-place technology is difficult to meet the construction accuracy of the short column are solved.
(4) The prefabricated short column steel bars (namely the first steel bars), the bottom plate steel bars (namely the second steel bars and the third steel bars) and the hidden beam steel bar cages are bound together, so that the steel bars are stressed cooperatively, and finally the prefabricated short column and the bottom plate are connected into a whole by pouring the hidden beam.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic structural diagram of a prefabricated cavity column assembly type column type maintenance pit provided by an embodiment of the invention;
FIG. 2 is a cross-sectional view of a prefabricated stub;
FIG. 3 is a schematic view of the structure of the base plate;
FIG. 4 is a cross-sectional view A-A of the structure shown in FIG. 3;
FIG. 5 is a cross-sectional view of B-B in the structure shown in FIG. 3;
FIG. 6 is a schematic view of the structure of the prefabricated short column when installed in the bottom area of the prefabricated short column;
FIG. 7 is a cross-sectional view of C-C in the configuration shown in FIG. 6;
FIG. 8 is a schematic structural diagram of a reinforcement cage installed in a hidden beam pouring area;
FIG. 9 is a cross-sectional view of D-D in the configuration shown in FIG. 8;
FIG. 10 is a schematic view of the structure of FIG. 7 after concrete has been poured into the cavity of the prefabricated stub;
FIG. 11 is a schematic view of the construction of FIG. 9 after casting of the hidden beam;
FIG. 12 is a schematic structural view of a plurality of prefabricated short columns leveled under a column head elevation leveling device;
the labels in the figure are:
1. the prefabricated short column comprises a prefabricated short column body, 101, a cavity, 102, a rib penetrating hole, 103, a pouring hole, 2, a bottom plate, 201, a prefabricated column bottom area, 202, a hidden beam pouring area, 3, a hidden beam, 4, a track embedded part, 5, first steel bars, 6, second steel bars, 7, third steel bars, 8, concrete, 9, a steel bar cage, 10, a mortar layer, 11, first positioning angle steel, 12, second positioning angle steel, 13 and a jacking driving unit.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the machine or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, either fixedly connected, detachably connected, or integrally connected, unless otherwise explicitly stated or limited; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 11, the prefabricated cavity column assembly type column type maintenance pit provided by the embodiment of the invention comprises a prefabricated short column 1, a bottom plate 2 and a hidden beam 3, wherein the prefabricated short column 1 is provided with a cavity 101 with an open lower end, a track embedded part 4 is embedded in the upper end of the prefabricated short column 1, a first steel bar 5 penetrates through the lower section part of the prefabricated short column 1, and the first steel bar 5 longitudinally extends out from two opposite side surfaces of the prefabricated short column 1 along a track; a plurality of prefabricated column bottom areas 201 which are longitudinally arranged along a rail at intervals, second steel bars 6 which are pre-embedded on the prefabricated column bottom areas 201 and can extend into the cavities 101 of the prefabricated short columns 1, and third steel bars 7 which are pre-embedded on two longitudinal side areas (namely, hidden beam pouring areas 202) of the prefabricated column bottom areas 201 are arranged on two transverse sides of the bottom plate 2, and the second steel bars 6 and the third steel bars 7 extend out of the surface of the bottom plate 2 along the direction perpendicular to the rail; the prefabricated short column 1 is vertically arranged on the prefabricated column bottom area 201, and concrete 8 for connecting the first steel bar 5 and the second steel bar 6 is poured in the cavity 101 of the prefabricated short column 1; the hidden beam 3 is poured on the longitudinal two side areas of the prefabricated column bottom area 201, a reinforcement cage 9 is arranged in the hidden beam 3, and the reinforcement cage 9 is connected with the first reinforcement 5 and the third reinforcement 7 respectively.
Illustratively, as shown in fig. 2, a plurality of bar penetrating holes 102 for allowing the first steel bars 5 to penetrate are formed in a lower section of the prefabricated short column 1, and the bar penetrating holes 102 are communicated with a cavity 101 of the prefabricated short column 1. Such design can reduce the vertical reinforcing bar plane location degree of difficulty of prefabricated short column 1, and the required precision is compared with cast-in-place scheme more loosely, and the adjustment is convenient, and can to a great extent avoid planting the muscle again.
Illustratively, as shown in fig. 2, the side wall of the cavity 101 of the prefabricated stub 1 is provided with a pouring hole 103 for pouring concrete 8 into the cavity 101 of the prefabricated stub 1. Preferably, said pouring orifice 103 is provided with at least two.
As shown in fig. 1 to 12, based on the prefabricated cavity column assembly type column type maintenance pit, the embodiment of the present invention further provides a construction method of the prefabricated cavity column assembly type column type maintenance pit, which includes the following steps:
and 7, installing the hidden beam template and pouring concrete 8 to form the hidden beam 3, so that the hidden beam 3, the bottom plate 2 and the prefabricated short column 1 form a whole.
As shown in fig. 12, in step 1, one or more first positioning angle steels 11 are respectively embedded in the same height on the two lateral sides of the prefabricated short column 1, so as to conveniently cooperate with a crane to hoist the prefabricated short column 1 and cooperate with a column head elevation leveling device to support the prefabricated short column 1 to ascend and descend, and thus, the automatic and mechanized construction of the vertical column is realized. Specifically, the column head elevation leveling device comprises second positioning angle steel 12 and a jacking driving unit 13, wherein the second positioning angle steel 12 is longitudinally arranged along a track, and the jacking driving unit 13 is respectively connected to two longitudinal ends of the second positioning angle steel 12; the jacking driving unit 13 is a manual jack, an electric jack or a hydraulic jack. Use when column cap elevation levelling device carries out the adjustment of column cap elevation to many prefabricated short columns 1, at the below position of the first location angle steel 11 of the horizontal both sides of many vertical same-row prefabricated short columns 1 respectively the level erect a second location angle steel 12 to through the laminating of jacking drive unit 13 drive second location angle steel 12 and first location angle steel 11, drive many prefabricated short columns 1 lift simultaneously and realize the adjustment of column cap elevation. That is to say, as long as first location angle steel 11 is accurate with the counterpoint of second location angle steel 12, can guarantee that all column caps are fixed a position accurately to the realization is once only to the accurate adjustment in the time of many prefabricated short column 1 column cap elevations, thereby has promoted the installation positioning efficiency of prefabricated short column 1 remarkably, further shortens construction period.
In the step 3, a gap of at least 20mm is reserved between the prefabricated short column 1 and the bottom plate 2 to ensure the thickness of the poured slurry layer 10 and improve the connection compactness of the slurry layer 10 between the prefabricated short column 1 and the bottom plate 2.
Therefore, according to the prefabricated cavity column assembly type column type maintenance pit and the construction method thereof provided by the embodiment of the invention, the innovative key points are as follows:
(1) the embodiment of the invention adopts a novel column type maintenance pit structure system of a cast-in-place hidden beam 3+ prefabricated short column 1 to replace the traditional cast-in-place method, thereby reducing the construction difficulty of the column type maintenance pit and improving the construction efficiency of the column type maintenance pit; meanwhile, the prefabricated short column 1 manufactured in a factory prefabricating mode can greatly improve the production quality and efficiency of the column member and effectively avoid the mold running phenomenon generated by a cast-in-place stand column.
(2) According to the embodiment of the invention, the prefabricated short column 1 is optimized into the cavity column, so that the weight of the prefabricated short column 1 is reduced on the premise of meeting the strength requirement of the short column, the transportation and installation of the prefabricated short column 1 are facilitated, meanwhile, the second steel bars 6 on the bottom plate 2 can extend into the cavity 101 of the prefabricated short column 1, the precision requirement is looser compared with that of a cast-in-place scheme, the steel bars can be prevented from being planted again to a great extent, and the problem of difficulty in binding the steel bars on site is solved.
(3) According to the embodiment of the invention, the integral prefabrication of the prefabricated short column 1 and the track embedded part 4 can ensure the connection strength and the integral accuracy of the prefabricated short column 1 and the track embedded part 4 at the top end thereof at one time, the quality and the standardization level of the prefabricated short column 1 and the embedded part thereof are obviously improved, the length of the vertical steel bar in the prefabricated short column 1 can be better controlled, the phenomenon that the thickness of the column top protective layer is too large is effectively avoided, and the problems that column head splitting occurs in the use process due to the fact that the cast-in-place technology is difficult to meet the construction accuracy of the short column are solved.
(4) In the embodiment of the invention, the prefabricated short column reinforcing steel bars (namely the first reinforcing steel bars 5), the bottom plate reinforcing steel bars (namely the second reinforcing steel bars 6 and the third reinforcing steel bars 7) and the hidden beam reinforcing cage 9 are bound together, so that the reinforcing steel bars are stressed cooperatively, and finally the prefabricated short column 1 and the bottom plate 2 are connected into a whole by pouring the hidden beam 3, thereby ensuring that the stress requirements under working conditions of running, parking and the like of a train are met.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (8)
1. A prefabricated cavity column assembly type column type maintenance pit is characterized by comprising a prefabricated short column, a bottom plate and a hidden beam, wherein the prefabricated short column is provided with a cavity with an opening at the lower end, a track embedded part is embedded in the upper end of the prefabricated short column, first steel bars penetrate through the lower section of the prefabricated short column, and the first steel bars longitudinally extend out of two opposite side surfaces of the prefabricated short column along a track; the transverse two sides of the bottom plate are provided with a plurality of prefabricated column bottom areas which are longitudinally arranged along a rail at intervals, second steel bars which are pre-embedded on the prefabricated column bottom areas and can extend into cavities of the prefabricated short columns, and third steel bars which are pre-embedded on the longitudinal two side areas of the prefabricated column bottom areas, and the second steel bars and the third steel bars extend out of the surface of the bottom plate along the direction perpendicular to the rail; the prefabricated short column is vertically arranged on the bottom area of the prefabricated short column, and concrete for connecting the first steel bar and the second steel bar is poured in a cavity of the prefabricated short column; the hidden beam is poured on the longitudinal two side areas of the prefabricated column bottom area, a reinforcement cage is arranged in the hidden beam, and the reinforcement cage is connected with the first reinforcement and the third reinforcement respectively.
2. The prefabricated cavity column assembly type column type maintenance pit as claimed in claim 1, wherein a plurality of bar penetrating holes for penetrating the first steel bars are formed in the lower section of the prefabricated short column, and the bar penetrating holes are communicated with the cavity of the prefabricated short column.
3. The fabricated cavity column fabricated column type service pit as claimed in claim 1, wherein the cavity side wall of the fabricated short column is provided with a pouring hole for pouring concrete into the cavity of the fabricated short column.
4. A construction method of a prefabricated cavity column assembly type column type maintenance pit is characterized by comprising the following steps:
step 1, manufacturing a prefabricated short column, wherein the prefabricated short column is provided with a cavity with an opening at the lower end, a track embedded part is embedded in the upper end of the prefabricated short column, and a plurality of reinforcement penetrating holes for penetrating and connecting first reinforcements are reserved in the lower section of the prefabricated short column;
step 2, pouring a bottom plate in the overhaul pit area, dividing a plurality of prefabricated column bottom areas which are longitudinally arranged at intervals along a track on the two transverse sides of the bottom plate according to the distribution positions of the prefabricated short columns, taking the longitudinal two side areas of the prefabricated column bottom areas as hidden beam pouring areas, embedding second reinforcing steel bars which can extend into cavities of the prefabricated short columns on the prefabricated column bottom areas, embedding third reinforcing steel bars on the longitudinal two side areas of the prefabricated column bottom areas, and enabling the second reinforcing steel bars and the third reinforcing steel bars to extend out of the top of the bottom plate along the direction perpendicular to the track;
step 3, measuring and finishing the flatness of the bottom area of the prefabricated column of the bottom plate, hoisting the prefabricated short column to the position right above the bottom area of the prefabricated short column, and ensuring that a second steel bar pre-embedded on the bottom plate extends into a cavity of the prefabricated short column when the prefabricated short column falls down;
step 4, adjusting the column cap elevations of the prefabricated short columns to the same height through a column cap elevation leveling device for positioning; after the prefabricated short column is positioned, a gap is reserved between the prefabricated short column and the bottom plate, and a mortar layer is poured into the gap to ensure that the prefabricated short column and the bottom plate are connected compactly;
step 5, connecting first steel bars at the lower section of the prefabricated short column in a penetrating manner, wherein the first steel bars longitudinally extend out from two opposite side surfaces of the prefabricated short column along the track; binding a reinforcement cage on the hidden beam pouring area to enable the reinforcement cage to be connected with the first reinforcement and the third reinforcement respectively;
step 6, pouring concrete into the cavity of the prefabricated short column, so that the concrete is respectively connected with the first steel bars and the second steel bars, and the prefabricated short column is connected with the bottom plate;
and 7, installing the hidden beam template and pouring concrete to form the hidden beam, so that the hidden beam, the bottom plate and the prefabricated short column form a whole.
5. The construction method of the prefabricated cavity column assembly type column type maintenance pit according to claim 4, wherein in the step 1, first positioning angle steels are pre-buried on two transverse sides of the prefabricated short column at the same height respectively.
6. The construction method of the prefabricated cavity column assembly type column type maintenance pit according to claim 5, wherein the column head elevation leveling device comprises second positioning angle steel and a jacking driving unit, the second positioning angle steel is longitudinally arranged along a track, and the jacking driving unit is respectively connected to two longitudinal ends of the second positioning angle steel;
use when column cap elevation levelling device carries out column cap elevation adjustment to many prefabricated short columns, at the below position of the first location angle steel of the horizontal both sides of many vertical same-row prefabricated short columns respectively the level erect a second location angle steel to through jacking drive unit drive second location angle steel and the laminating of first location angle steel, drive many prefabricated short columns simultaneously and go up and down to realize the adjustment of column cap elevation.
7. The construction method of the prefabricated cavity column assembly type column type maintenance pit according to claim 5, wherein the jacking driving unit is a manual jack, an electric jack or a hydraulic jack.
8. The construction method of the prefabricated cavity column assembled column type overhaul pit as claimed in claim 4, wherein in the step 3, at least 20mm of clearance is reserved between the prefabricated short column and the bottom plate.
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| WO2017206412A1 (en) * | 2016-06-03 | 2017-12-07 | 长沙远大住宅工业集团股份有限公司 | Superimposed assembly-type underground pipe gallery system and construction and manufacturing process |
| JP2019150558A (en) * | 2018-03-02 | 2019-09-12 | 株式会社湯山製作所 | Medicine chest dispensing device |
| CN108425375A (en) * | 2018-04-25 | 2018-08-21 | 李藏柱 | A kind of basis prefabricated post and its connection structure and its construction method |
| WO2020118563A1 (en) * | 2018-12-12 | 2020-06-18 | 大连理工大学 | Design and rapid construction methods for flush assembly of prefabricated steel beams and floor |
| CN110512921A (en) * | 2019-09-12 | 2019-11-29 | 中铁第四勘察设计院集团有限公司 | Overhaul assembling structure, train overhaul platform and its construction method of column |
| CN111706128A (en) * | 2020-06-17 | 2020-09-25 | 上海建科工程咨询有限公司 | Prefabricated inspection pit stand column and construction method thereof |
| CN213953148U (en) * | 2020-10-29 | 2021-08-13 | 中亿丰建设集团股份有限公司 | Column type inspection pit precast concrete track column |
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