CN111719559A - Concrete conveying construction method for deep foundation pit by vertical synchronous full-reverse construction method - Google Patents
Concrete conveying construction method for deep foundation pit by vertical synchronous full-reverse construction method Download PDFInfo
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- CN111719559A CN111719559A CN202010688326.3A CN202010688326A CN111719559A CN 111719559 A CN111719559 A CN 111719559A CN 202010688326 A CN202010688326 A CN 202010688326A CN 111719559 A CN111719559 A CN 111719559A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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Abstract
The concrete conveying construction method adopting the deep foundation pit up-down synchronous full reverse construction method comprises the following steps: firstly, pouring concrete of a reverse beam slab into a double-line converging construction process; and (II) post-positioned concrete pouring construction processes such as columns, shear walls, lining walls and the like. The invention adopts a mode that concrete is directly unloaded from one layer to a construction top layer and a small-volume concrete mixing truck modified by a self-discharging three-wheeled automobile is transferred to a position above a pouring point, and a funnel and a hose are arranged at the pouring point to solve the problems of transportation and segregation of high-grade concrete of a rear part and a beam-column joint under the characteristic condition of a reverse construction method; and a concrete delivery pump is adopted below the negative three layers to carry out foundation pit below the reserved hoisting hole, concrete is directly unloaded from one layer to the upper part of a pouring layer, a pressure relief device and an inclined chute to a delivery pump hopper, and then the problems of transportation and segregation of concrete of the basement floor and the bottom plate beam plate are solved in a mode of the concrete delivery pump and a pump pipe to a pouring point, so that the concrete construction quality is ensured, labor force is saved, and the engineering construction progress is accelerated.
Description
Technical Field
The invention relates to a concrete conveying construction method of a deep foundation pit by an up-down synchronous full reverse construction method.
Background
Along with the high development of cities, the construction land, the complex engineering environment and various construction period requirements are short, so that the basement development of the building engineering faces more complex requirements, and the vertical synchronous full reverse construction method technology provides a new technical means for meeting the requirements, wherein concrete conveying is a key difficulty of the reverse construction method of the ultra-deep and ultra-large basements. Therefore, there is an urgent need for a concrete conveying construction method for deep foundation pit by vertical and horizontal synchronous full reverse construction method, which can effectively solve the problems of vertical and horizontal transportation and concrete segregation in the full reverse construction method concrete construction, accelerate the construction speed and shorten the construction period.
Disclosure of Invention
The invention aims to solve the technical problem of providing a concrete conveying construction method of a deep foundation pit by an up-down synchronous full reverse construction method, which can effectively solve the problems of vertical and horizontal transportation and concrete segregation in the concrete construction of the full reverse construction method, accelerate the construction speed and shorten the construction period.
The technical scheme adopted by the invention for solving the technical problems is as follows: the concrete conveying construction method adopting the deep foundation pit up-down synchronous full reverse construction method comprises the following steps:
firstly, pouring concrete of a reverse beam slab into a double-line converging construction process;
preparing a beam-column joint concrete direct unloading system, a transfer tank car and a first line;
b. the beam slab formwork support and the steel bars are concealed and accepted;
c. reporting and preparing by commercial concrete factories;
d. directly unloading the concrete to a pouring top-layer tank car by using a guide pipe;
e. transporting the tank car to the position above the pouring point;
f. directly discharging the concrete into the beam-column joint through a preformed hole of the floor slab and a hose;
g. pouring concrete;
h. curing the concrete;
preparing a foundation pit, a direct discharge chute, a pump pipe and a second line under the beam slab concrete soil pump;
b. the beam slab formwork support and the steel bars are concealed and accepted;
c. reporting and preparing by commercial concrete factories;
d. directly unloading the concrete to a pouring chute by using a guide pipe;
e. transferring the concrete into a foundation pit ground pump through a chute;
f. pumping the concrete to a beam slab pouring point;
g. pouring concrete;
h. curing the concrete;
(II) post-positioned concrete pouring construction processes such as columns, shear walls, lining walls and the like;
a. preparing post-mounted concrete direct unloading systems such as columns, shear walls, lining walls and the like, a transfer tank car and lines;
b. steel bar hiding and wall and column template acceptance;
c. reporting and preparing commercial concrete;
d. directly unloading the concrete to a pouring top-layer tank car by using a guide pipe;
e. transporting the tank car to the position above the pouring point;
f. flows into the postposition part through the floor preformed hole and the hose;
g. pouring concrete;
h. and (5) concrete curing.
Further, the beam-column joint concrete is C60 micro-expansion self-compaction concrete; the beam slab concrete is C35 micro-expansion internal fiber-doped concrete; the concrete of the column and the shear wall is C60 micro-expansion self-compaction concrete; the inner lining wall is C35 self-compacting concrete.
Further, the concrete direct-discharging system has the following operation key points:
1) the method is convenient for commercial concrete vehicles to stop and is beneficial to outdoor water prevention, a proper position is selected as a direct-discharging point, and a direct-discharging pipe hole is reserved when concrete is poured on the reverse floor of the basement;
2) the material discharge port and the top of the direct discharge pipe of the commercial concrete transport tank car are provided with a hopper which has the same capacity as a small tank car on the floor and is provided with a control valve, and the material discharge is controlled up and down by adopting an interphone;
3) every whereabouts one deck one set of device of preventing educing of straight unloading pipe, the rubber sealing strip is impressed to the joint, reduces concrete and send down in-process grit and the separation of cement paste.
Further, the concrete of the beam-column joint and the concrete of the reverse-construction rear-mounted part are conveyed: the complete concrete conveying system is characterized in that commercial concrete is directly unloaded to the top construction layer through a guide pipe and an anti-segregation device, a small-volume concrete mixing and transporting tank car is transported to the position above a pouring point, and a hopper, a hose and the pouring point are arranged on the concrete conveying system.
Further, the concrete is delivered to the foundation ditch under the ground pump: when the first-layer beam plate and the second-layer beam plate are constructed, a concrete conveying ground pump is arranged on the ground, because the concrete is conveyed downwards to frequently block pipes, the third-layer beam plate and the lower layer beam plate are changed into a concrete conveying ground pump for a foundation pit, the concrete is conveyed into the foundation pit by a direct-discharge and chute inner ground pump and then is conveyed to a pouring point of a beam plate structure through the ground pump and a pump pipe; and the ground pump is hoisted into the foundation pit by adopting a combined mode of an automobile truck-mounted crane and a movable electric hoist crane.
And further, slump detection is carried out on each commercial concrete vehicle on site according to the concrete mix proportion requirement, goods return is carried out when the slump detection does not meet the requirement, initial setting and final setting test pieces are reserved for the first vehicle each time, and other standard maintenance test pieces, the same test piece and the formwork removal test pieces are reserved according to the standard requirement.
Further, controlling the concrete pouring amount: because the casting amount of the post-positioned member and the beam-column joint concrete is relatively small each time, the parts are scattered, the casting speed is slow, the casting speed is comprehensively considered according to the casting temperature, the initial setting time, the difficulty of the casting part and the length of the transportation and conveying distance of the concrete, the square amount of the supplied premixed concrete on each vehicle is controlled to be matched with the site speed, and the initial setting concrete is strictly forbidden.
The technical principle of the invention is as follows:
(1) the technical principle of the high-grade concrete conveying process of the post-positioned part and the beam-column joint is as follows: according to the characteristics of an up-down synchronous reverse construction method, a horizontal beam plate is firstly constructed in a basement structure, then postpositions such as a steel column outer cover, a shear wall, an inner lining wall and a staircase are constructed, beam-column joints of the horizontal beam plate structure are all made of high-grade, micro-expansive and self-compacting concrete, and the problems of low concrete quantity, poor pumping performance, limited pouring speed, long pouring time, long horizontal transportation, limited operation space, high labor cost and the like during construction are solved by utilizing a constructed floor as a concrete horizontal transportation platform in the reverse construction process and utilizing a self-unloading three-wheeled vehicle to be a special small-volume concrete stirring transportation tank truck according to the floor bearing capacity, so that the concrete segregation problem in the long-distance transportation process in the floor is solved, the mechanical operation in the transportation process is realized, and concrete is directly unloaded from a layer of guide pipe (a set of anti-segregation pressure relief device is arranged every 5-6 m of the guide pipe) to a construction top layer + small-volume concrete stirring transportation tank truck to a pouring point, and a, A complete concrete delivery system from hose to casting point;
(2) the concrete conveying process principle of the floor beam plate structure is as follows: according to the characteristics of a deep foundation pit and a reverse construction method, the concrete pouring space of a reverse construction floor beam plate structure is limited by a top cover, and a concrete conveying pump of the deep foundation pit conveys adverse factors downwards due to negative pressure, a concrete conveying ground pump is adopted to directly unload concrete from an outdoor layer to the upper part of a pouring layer by using a guide pipe (one guide pipe is arranged in the height of one layer to two layers, a set of anti-segregation pressure relief device is arranged in the lower foundation pit of a reserved hoisting hole), an inclined chute is rotated into a conveying ground pump hopper, and then the concrete is conveyed to a complete concrete conveying system of a pouring point by the concrete conveying pump and a pump pipe pump, so that the problems of transportation and segregation of the concrete of a reverse construction floor beam plate or a bottom plate of a;
(3) the technological principle of the concrete downward conveying segregation-preventing device is as follows: the concrete is conveyed downwards in an ultra-deep mode, a set of anti-segregation device is arranged on a conduit with one-two-layer height, and pressure relief and segregation prevention are carried out by changing the flow direction of the concrete;
(4) the self-discharging three-wheeled automobile is changed into a special small-volume concrete transporting small tank car with a stirring function.
The invention has the following characteristics:
(1) the method solves the problems of transportation and segregation of high-grade concrete of a rear part and a beam-column joint under the characteristic condition of a reverse construction method by adopting a mode that concrete is directly unloaded from one layer to a construction top layer and a small-volume concrete mixing truck modified by a self-discharging three-wheeled vehicle is transferred to a position above a pouring point, a hopper and a hose are transferred to the pouring point, thereby ensuring the construction quality of the concrete, saving labor force and accelerating the construction progress of an engineering;
(2) and (3) adopting a concrete delivery pump below negative three layers (elevation-16.250-30.700) to transfer concrete from a reserved foundation pit below a hoisting hole to a delivery pump hopper from one layer to the position above a pouring layer, a pressure relief device and an inclined chute, and then solving the problems of transportation and segregation of concrete of the basement floor and the bottom plate beam plate in a mode of delivering the concrete from the concrete delivery pump and a pump pipe to a pouring point, thereby ensuring the construction quality of the concrete.
The concrete conveying construction method adopting the deep foundation pit up-down synchronous full reverse construction method is practical, safe, reliable, strong in operability, obvious in social benefit and economic benefit and has popularization value.
The invention is suitable for the concrete conveying construction of the basement by the reverse construction method.
Drawings
FIG. 1 is a schematic diagram of a high-grade concrete conveying process for a reverse beam-column joint in an embodiment of the invention;
FIG. 2 is a schematic diagram of a post-positioned concrete pouring construction process for columns, shear walls, interior lining walls and the like in the embodiment of the invention:
FIG. 3 is a schematic diagram of a concrete conveying process of a floor beam-slab structure in the embodiment of the invention:
in the figure: 1. commercial concrete transport vehicle, 2 square hoppers such as a transport concrete mixing transport vehicle, 3 a control valve, 4 an anti-segregation pressure relief device, 5 phi 256 ﹡ 4 direct discharge pipes, 6 a special small-square concrete mixing transport tank truck modified by a self-discharging three-wheeled vehicle, 7 a funnel, 8 a floor slab reserved phi 200 pouring hole, 9 phi 160 long plastic hose, 10 beam column joint concrete C60 micro-expansion self-compaction concrete, 11 a floor slab backing layer is a reverse operation interface layer, 12 phi 160 short plastic hose, 13 post-mounted parts such as columns and walls C60 micro-expansion self-compaction concrete, 14 a white iron sheet made concrete chute, 15 a concrete pump underground foundation pit, 16 phi 150 concrete pump pipes, 17 a reverse operation construction layer-floor beam slab structure, 18 a reverse operation stage-hanging reserved object hole, 19 a hoist, an up and down synchronous reverse operation stage-10 tons of electric hoist, 20. and (5) supporting a mould frame.
Detailed Description
The invention is further explained with reference to the drawings and the embodiments.
Examples
Referring to the attached drawings, the concrete conveying construction method of the deep foundation pit by the vertical synchronous full reverse construction method comprises the following steps:
firstly, pouring high-low grade concrete of a reverse beam plate to form a double-line converging construction process;
preparing a beam-column joint concrete direct unloading system, a transfer tank car and a first line;
b. the beam slab formwork support and the steel bars are concealed and accepted;
c. reporting and preparing by commercial concrete factories;
d. directly unloading the concrete to a pouring top-layer tank car by using a guide pipe;
e. transporting the tank car to the position above the pouring point;
f. directly unloading the concrete into the beam-column joint through a reserved hole of a floor slab and a hose (phi 200 pouring hole, hanging phi 160 long plastic hose);
g. pouring concrete;
h. curing the concrete;
preparing a foundation pit, a direct discharge chute, a pump pipe and a second line under the beam slab concrete soil pump;
b. the beam slab formwork support and the steel bars are concealed and accepted;
c. reporting and preparing by commercial concrete factories;
d. directly unloading the concrete to a pouring chute by using a guide pipe;
e. transferring the concrete into a foundation pit ground pump through a chute;
f. pumping the concrete to a beam slab pouring point;
g. pouring concrete;
h. curing the concrete;
(II) post-positioned concrete pouring construction processes such as columns, shear walls, lining walls and the like;
a. preparing post-mounted concrete direct unloading systems such as columns, shear walls, lining walls and the like, a transfer tank car and lines;
b. steel bar hiding and wall and column template acceptance;
c. reporting and preparing commercial concrete;
d. directly unloading the concrete to a pouring top-layer tank car by using a guide pipe;
e. transporting the tank car to the position above the pouring point;
f. flows into an inverted horn formwork funnel of the rear part through a floor preformed hole and a hose (phi 200 pouring hole, hanging phi 160 short plastic hose);
g. pouring concrete;
h. and (5) concrete curing.
In the embodiment, the beam-column joint concrete is C60 micro-expansion self-compaction concrete; the beam slab concrete is C35 micro-expansion internal fiber-doped concrete; the concrete of the column and the shear wall is C60 micro-expansion self-compaction concrete; the inner lining wall is C35 self-compacting concrete.
The mix proportion of the high-grade C60 micro-expansion self-compacting concrete is required:
1) crushing stone: 5-16 mm;
2) cement type and strength: P.O42.5;
3) slump design: 260 plus or minus 20mm and 650 plus or minus 50 mm;
4) initial setting time: about 7h45 min; final setting time: about 11h15 min;
5) expansion ratio: the shrinkage-compensating concrete with limited expansion rate not less than 0.02% is used.
In this embodiment, the concrete direct-discharging system operation main points:
1) the method is convenient for commercial concrete vehicles to stop and is beneficial to outdoor water prevention, a proper position is selected as a direct-discharging point, and a direct-discharging pipe hole is reserved when concrete is poured on the reverse floor of the basement;
2) the material discharge port and the top of the direct discharge pipe of the commercial concrete transport tank car are provided with a hopper which has the same capacity as a small tank car on the floor and is provided with a control valve, and the material discharge is controlled up and down by adopting an interphone;
3) every whereabouts one deck one set of device of preventing educing of straight unloading pipe, the rubber sealing strip is impressed to the joint, reduces concrete and send down in-process grit and the separation of cement paste.
In this embodiment, the post-mounted concrete is carried to beam column joint concrete and contrary:
the reverse construction method comprises the steps of firstly constructing a floor beam slab horizontal structure, and then constructing a floor beam slab horizontal structure after a layer of earth and stone is dug downwards, so that the floor beam slab horizontal structure is recycled to support and transmit the horizontal force of a basement support system in the reverse construction process, each layer of beam slab structure of the basement is firstly jacked and then backed, the concrete conveying of beam column joints of high-grade concrete and postpositions (steel tube column outer-wrapped concrete, shear walls, staircases, lining walls and other stress members in non-reverse construction stages) cannot be realized by directly matching and conveying the concrete by using a tower crane in the traditional forward construction method, and a complete concrete conveying system is changed from commercial concrete to a construction top layer directly discharged to a construction top layer through a guide pipe and an anti-segregation device and then to a pouring point + hopper and a hose to a pouring point through a small-square concrete stirring and conveying tank truck.
In this embodiment, the segregation preventing device is made of a steel plate, and has the main functions of pressure relief and segregation prevention by changing the flow direction of concrete.
In the embodiment, according to the design bearing capacity of each floor of the basement of the project, a chassis of a Wuzheng brand 7YP-1450D47 type self-discharging three-wheeled automobile is modified and additionally provided with a 1m chassis3A small concrete transporting tank car with an automatic stirring function.
In this embodiment, the concrete is delivered to the foundation ditch under the ground pump:
when the construction of the first floor beam plate and the second floor beam plate is carried out, the concrete conveying ground pump is arranged on the ground, because the concrete is frequently blocked when being delivered downwards, the foundation pit under the third floor beam plate and the following floor beam plates is changed into the concrete conveying ground pump, therefore, the conventional positive pressure pumping mode that the cast-in-place concrete surface of the beam slab is 2.5m higher than the ground pump surface of the foundation pit is realized, the concrete is directly unloaded and is poured into a ground pump in the foundation pit, and is conveyed to a pouring point of the beam slab structure through the ground pump and a pump pipe, the weight of the concrete conveying ground pump is about 6 tons, because the engineering commodity concrete feeding area adopts an up-and-down synchronous full reverse operation method, the projection line width of the inner side of the underground chamber is 2.5m greater than that of the outer side of the main structure, and because of the reverse operation requirement, two 16.4m 7m lifting holes are arranged, and a movable electric hoist crane is hung under the three-layer beam plate structure, the electric hoist crane is cantilevered by 4.5m, the north lifting hole considers that a concrete delivery ground pump needs to go in and out of a foundation pit, and the electric hoist is designed according to 10 tons. The ground pump is hoisted into the foundation pit by adopting a combined mode of an automobile truck-mounted crane (displacement outside the foundation pit) and a movable electric hoist crane (entering and exiting the foundation pit).
In the embodiment, slump detection is carried out on each vehicle of commercial concrete on site according to the concrete mix proportion requirement, goods return is carried out when the slump detection does not meet the requirement, initial set and final set test pieces are reserved for the first vehicle at each time, and other standard maintenance test pieces, the same test piece and the formwork removal test piece are reserved according to the standard requirement.
In this embodiment, the concrete placement amount is controlled: because the high-grade concrete of the post-component and the beam-column joint has relatively less pouring amount each time, scattered parts and low pouring speed, the pouring speed is comprehensively considered according to the pouring temperature, the initial setting time, the difficulty of the pouring parts and the length of the transportation and conveying distance of the concrete, the square amount of each vehicle of the supplied premixed concrete is controlled to be matched with the site speed, and the initial setting concrete is strictly forbidden.
The concrete is organized, constructed and accepted strictly according to the unified standards for construction quality acceptance of constructional engineering GB50300, premixed concrete GB/T14902 and concrete structure engineering construction quality acceptance Standard GB 50205.
Application example: the second-phase medical building construction project of the XX hospital in Hunan is a comprehensive building integrating medical treatment, hospitalization and parking, and the total building area is 165941m2Wherein the ground building area is 112879m2The underground building area is 53062m2Number of layers: 20 above ground layers and 7 below ground layers. The main building of the project is constructed by adopting an up-down synchronous full-reverse construction method, the skirt building is constructed by adopting a semi-reverse construction method, and the excavation depth of a foundation pit31.9 m. Aiming at the difficulty of concrete conveying in the reverse construction process of the engineering basement, the construction process that the beam plate concrete conveying of the basement adopts 'direct dumping + underground pump foundation pit', the post-positioned piece and the high-grade concrete conveying of the beam column joint adopt 'direct dumping + small concrete conveying tank car transferring' is designed. In the whole construction process, the concrete is subjected to anti-segregation measures, secondary transfer mechanization is realized, the concrete conveying time is shortened, the construction quality of the concrete is ensured, the influence on the surrounding environment is small, and the success is achieved.
The invention adopts two modes of direct unloading, underground pumping, underground foundation pit and direct unloading and small concrete transportation tank car transportation to realize the secondary transportation mechanization of the concrete of the postposition and the beam-column joint, realizes the positive pressure transportation of the concrete of the underground pumping foundation pit, reduces the phenomena of pump blockage and pipe blockage, and has small cost investment and obvious economic effect.
The invention is based on the actual needs of engineering, comprehensively considers various factors such as quality, construction period, cost, technology and the like, and selects construction equipment and technology with mature technology and high reliability for combination. The method has universal popularization and application values in reverse construction method basement construction.
Claims (7)
1. The concrete conveying construction method of the deep foundation pit by the vertical synchronous full reverse construction method is characterized by comprising the following steps:
firstly, pouring concrete of a reverse beam slab into a double-line converging construction process;
preparing a beam-column joint concrete direct unloading system, a transfer tank car and a first line;
b. the beam slab formwork support and the steel bars are concealed and accepted;
c. reporting and preparing by commercial concrete factories;
d. directly unloading the concrete to a pouring top-layer tank car by using a guide pipe;
e. transporting the tank car to the position above the pouring point;
f. directly discharging the concrete into the beam-column joint through a preformed hole of the floor slab and a hose;
g. pouring concrete;
h. curing the concrete;
preparing a foundation pit, a direct discharge chute, a pump pipe and a second line under the beam slab concrete soil pump;
b. the beam slab formwork support and the steel bars are concealed and accepted;
c. reporting and preparing by commercial concrete factories;
d. directly unloading the concrete to a pouring chute by using a guide pipe;
e. transferring the concrete into a foundation pit ground pump through a chute;
f. pumping the concrete to a beam slab pouring point;
g. pouring concrete;
h. curing the concrete;
(II) concrete pouring construction processes of post-placed parts of the columns, the shear walls and the lining walls;
a. preparing a column, a shear wall, a lining wall rear piece concrete direct unloading system, a transfer tank car and a line;
b. steel bar hiding and wall and column template acceptance;
c. reporting and preparing commercial concrete;
d. directly unloading the concrete to a pouring top-layer tank car by using a guide pipe;
e. transporting the tank car to the position above the pouring point;
f. flows into the postposition part through the floor preformed hole and the hose;
g. pouring concrete;
h. and (5) concrete curing.
2. The deep foundation pit up-down synchronous full reverse construction method concrete conveying construction method according to claim 1, characterized in that: the beam-column joint concrete is C60 micro-expansion self-compaction concrete; the beam slab concrete is C35 micro-expansion internal fiber-doped concrete; the concrete of the column and the shear wall is C60 micro-expansion self-compaction concrete; the inner lining wall is C35 self-compacting concrete.
3. The deep foundation pit up-down synchronous full reverse construction method concrete conveying construction method according to claim 1 or 2, characterized in that: the concrete direct-discharging system has the following operation key points:
1) the method is convenient for commercial concrete vehicles to stop and is beneficial to outdoor water prevention, a proper position is selected as a direct-discharging point, and a direct-discharging pipe hole is reserved when concrete is poured on the reverse floor of the basement;
2) the material discharge port and the top of the direct discharge pipe of the commercial concrete transport tank car are provided with a hopper which has the same capacity as a small tank car on the floor and is provided with a control valve, and the material discharge is controlled up and down by adopting an interphone;
3) every whereabouts one deck one set of device of preventing educing of straight unloading pipe, the rubber sealing strip is impressed to the joint, reduces concrete and send down in-process grit and the separation of cement paste.
4. The deep foundation pit up-down synchronous full reverse construction method concrete conveying construction method according to claim 1 or 2, characterized in that: and (3) conveying the beam-column joint concrete and the concrete of the reverse-construction rear piece: the complete concrete conveying system is characterized in that commercial concrete is directly unloaded to the top construction layer through a guide pipe and an anti-segregation device, a small-volume concrete mixing and transporting tank car is transported to the position above a pouring point, and a hopper, a hose and the pouring point are arranged on the concrete conveying system.
5. The deep foundation pit up-down synchronous full reverse construction method concrete conveying construction method according to claim 1 or 2, characterized in that: concrete delivery ground pump foundation pit: when the first-layer beam plate and the second-layer beam plate are constructed, a concrete conveying ground pump is arranged on the ground, because the concrete is conveyed downwards to frequently block pipes, the third-layer beam plate and the lower layer beam plate are changed into a concrete conveying ground pump for a foundation pit, the concrete is conveyed into the foundation pit by a direct-discharge and chute inner ground pump and then is conveyed to a pouring point of a beam plate structure through the ground pump and a pump pipe; and the ground pump is hoisted into the foundation pit by adopting a combined mode of an automobile truck-mounted crane and a movable electric hoist crane.
6. The deep foundation pit up-down synchronous full reverse construction method concrete conveying construction method according to claim 1 or 2, characterized in that: and performing slump detection on each commercial concrete vehicle on site according to the concrete mix proportion requirement, returning goods when the slump detection does not meet the requirement, reserving initial setting and final setting test pieces for the first vehicle each time, and reserving other standard maintenance test pieces, the same test piece and the form removal test piece according to the standard requirement.
7. The deep foundation pit up-down synchronous full reverse construction method concrete conveying construction method according to claim 1 or 2, characterized in that: controlling concrete pouring amount: because the casting amount of the post-positioned member and the beam-column joint concrete is relatively small each time, the parts are scattered, the casting speed is slow, the casting speed is comprehensively considered according to the casting temperature, the initial setting time, the difficulty of the casting part and the length of the transportation and conveying distance of the concrete, the square amount of the supplied premixed concrete on each vehicle is controlled to be matched with the site speed, and the initial setting concrete is strictly forbidden.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH084034A (en) * | 1994-06-24 | 1996-01-09 | Takenaka Komuten Co Ltd | Basement skeleton building construction in inverted construction work of building |
| CN104314081A (en) * | 2014-10-17 | 2015-01-28 | 中铁八局集团建筑工程有限公司 | Deep foundation pit driftway-free basement concrete pumping construction device |
| CN105839850A (en) * | 2016-03-25 | 2016-08-10 | 温州建设集团有限公司 | Basement reverse-construction scape post-casting pre-stressed construction method |
| CN205578008U (en) * | 2016-04-21 | 2016-09-14 | 东通岩土科技（杭州）有限公司 | Secretly dig contrary way concrete roof colonnade formula slip casting tubular construction |
| CN106049501A (en) * | 2016-05-30 | 2016-10-26 | 中建五局第三建设有限公司 | Construction method for large-drop downward concrete transporting |
| CN210152279U (en) * | 2019-05-06 | 2020-03-17 | 中建八局第三建设有限公司 | Concrete chute for pouring basement |
-
2020
- 2020-07-16 CN CN202010688326.3A patent/CN111719559A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH084034A (en) * | 1994-06-24 | 1996-01-09 | Takenaka Komuten Co Ltd | Basement skeleton building construction in inverted construction work of building |
| CN104314081A (en) * | 2014-10-17 | 2015-01-28 | 中铁八局集团建筑工程有限公司 | Deep foundation pit driftway-free basement concrete pumping construction device |
| CN105839850A (en) * | 2016-03-25 | 2016-08-10 | 温州建设集团有限公司 | Basement reverse-construction scape post-casting pre-stressed construction method |
| CN205578008U (en) * | 2016-04-21 | 2016-09-14 | 东通岩土科技（杭州）有限公司 | Secretly dig contrary way concrete roof colonnade formula slip casting tubular construction |
| CN106049501A (en) * | 2016-05-30 | 2016-10-26 | 中建五局第三建设有限公司 | Construction method for large-drop downward concrete transporting |
| CN210152279U (en) * | 2019-05-06 | 2020-03-17 | 中建八局第三建设有限公司 | Concrete chute for pouring basement |
Non-Patent Citations (1)
| Title |
|---|
| 杨理准等: "《公路施工手册 基本作业》", 30 April 1993, 人民交通出版社 * |
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