CN113668588B - Efficient backfill construction method for large-scale assembled steel plate box factory building foundation - Google Patents
Efficient backfill construction method for large-scale assembled steel plate box factory building foundation Download PDFInfo
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- CN113668588B CN113668588B CN202110971744.8A CN202110971744A CN113668588B CN 113668588 B CN113668588 B CN 113668588B CN 202110971744 A CN202110971744 A CN 202110971744A CN 113668588 B CN113668588 B CN 113668588B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
Abstract
The invention discloses a high-efficiency backfill construction method for a large-scale assembly type steel plate box factory building foundation, which is characterized by comprising the following steps of: 1) Foundation excavation: paying off according to design requirements, and excavating a foundation of a plant foundation; 2) Cushion layer construction: constructing a concrete cushion on the foundation of the ground; 3) Isolation of a construction area: paying off and positioning the position of the upright column in the foundation pit of the foundation, installing baffles at the periphery of the upright column to isolate the edge of the column, dividing the foundation pit into an area inside the column and an area outside the column, arranging a reinforcing steel bar processing area outside the foundation pit, and simultaneously, marking a ground beam point in advance on the baffles; 4) Backfilling a construction pavement; 5) Performing synchronous construction in different areas; 6) And (5) pouring the ground beam. The method solves the problems that in the ground beam pouring link of a large-scale factory building, the working procedures are more crossed, and after the ground beam is poured, the earthwork backfilling difficulty is high, the quality is poor, and the earthwork is easy to sink.
Description
Technical Field
The invention belongs to a backfill construction method of a foundation, and particularly relates to an efficient backfill construction method of a large-scale assembled steel plate box factory building foundation.
Background
The demands of emerging industrial parks in various cities on plants are increasingly strengthened, the problems of short construction period, high requirements and more process conversions are generally existed in the construction process of large plants, and the pouring of the upright columns and the ground beams is the key for controlling the technical quality of the plants. There are three main methods for the construction of ground beams today:
1) Firstly, completing all earthwork backfilling, then performing reverse excavation, and finally completing integral pouring of the stand column and the ground beam; however, in this method, the reverse excavation has a problem of repeated excavation and filling of earth, and has a high requirement for precise construction and a long construction period.
2) The second method is that firstly, the upright post pouring is completed, the ground beam steel bars are reserved, then the earthwork backfilling is carried out, the ground beam and the steel bars reserved on the upright post are dug out, then the ground beam is constructed (the steel bars are bound, the mold is filled and the pouring is carried out), and finally the residual earthwork is backfilled; however, the method has complex procedures, and the procedures need to be matched with each other; the waiting time of the two times of concrete is long; the reserved ground beam reinforcing steel bar is not easy to excavate mechanically, the manual excavation work amount is large, and the efficiency is low; the steel structure anchor bolt pre-buried on the stand is destroyed easily.
3) And thirdly, firstly, pouring a foundation, pouring the upright post and the ground beam after the foundation is poured, and backfilling earthwork after all pouring and maintenance are finished. However, in the method, the concrete curing time is long, and the earthwork backfilling waiting time is long; the backfill soil under the ground beam is not easy to tamp, the construction difficulty is high, and the backfill soil quality can not be ensured.
Disclosure of Invention
Aiming at the problems, the invention provides an efficient backfilling construction method for a large-scale assembled steel plate box factory building foundation, which solves the problems that in the large-scale factory building ground beam pouring link, the working procedures are more crossed, and after the ground beam is poured, the earthwork backfilling difficulty is high, the quality is poor and the earthwork is easy to sink.
The invention is realized by the following technical scheme.
The efficient backfill construction method of the large-scale assembled steel plate box factory building foundation is characterized by comprising the following steps of:
1) Foundation excavation
Paying off according to design requirements, and excavating a foundation of a plant foundation;
2) Bedding construction
Constructing a concrete cushion on the foundation of the ground;
3) Isolation of construction area
Paying off and positioning the position of an upright post in a foundation pit of the foundation, installing barriers at the periphery of the upright post to isolate the edge of the post, dividing the foundation pit into an area inside the post and an area outside the post, arranging a steel bar processing area outside the foundation pit, and simultaneously advancing and marking a ground beam point on the barriers;
4) Construction access road backfilling
Carrying out earthwork backfill on the transverse axis position of the foundation pit of the foundation to form a transverse construction access road, then simultaneously carrying out earthwork backfill on two sides of the baffle respectively along the edge of the foundation and the edge of the transverse construction access road so as to ensure that earthwork on two sides of the baffle is symmetrically backfilled synchronously and balance the earthwork extrusion force on two sides of the baffle, thereby preventing the baffle from deviating from the set position or inclining and simultaneously forming a longitudinal construction access road convenient for entering the baffle for construction;
5) Synchronous construction by regions
Afterwards, regional, the outer region of post, reinforcing bar processing region is under construction simultaneously in the post, specifically includes:
binding, molding and pouring steel bars of the short column in the area in the column, namely in the partition, and embedding ground beam steel bars in advance;
backfilling the residual earthwork in the area outside the column, namely the foundation field outside the barrier, and after backfilling, reversely excavating the area of the ground beam according to the ground beam point marked on the barrier to form a ground beam pouring groove for pouring ground beam concrete, so that the construction area of the ground beam can be formed by pouring at one time;
manufacturing the reinforcing steel bars required by ground beam construction outside a foundation field in a reinforcing steel bar processing area, and manufacturing ground beam reinforcing cages, wherein the length of each section of ground beam reinforcing cage corresponds to the length of each section of ground beam pouring groove respectively, so that each section of ground beam reinforcing cage is conveniently and integrally hoisted, and the time for independently binding the reinforcing steel bars in the ground beam pouring grooves is saved;
6) Pouring of ground beam
And 5) after construction, firstly removing the separating barriers installed at the positions of the stand columns, then transferring the ground beam reinforcement cage into a ground beam pouring groove on site, connecting the ground beam reinforcement cage with ground beam reinforcements pre-embedded in the short columns, and performing ground beam concrete pouring after acceptance inspection is qualified.
As a preferred technical scheme, in the step 3), the separating barrier is made of a steel template.
As a preferable technical scheme, in the step 3), an upright post construction channel with the width of 0.4-0.8 m is reserved between the partition and the edge of the designed upright post.
As a preferable technical scheme, in the cushion layer construction in the step 2), embedded parts used for being fixed with the inner side of the partition are arranged in the cushion layer.
Preferably, in the step 4), the width of the transverse construction access road is 4-6 m, the width of the longitudinal construction access road is 4-6 m, and the width of the longitudinal construction access road is not less than the width of the barrier.
Preferably, in the step 3), the height of the barrier is 10-30 cm higher than the height of the backfill soil.
As a preferable technical scheme, in the step 5), when the residual earthwork is backfilled in the area outside the column, the earthwork on the two sides of the partition is backfilled layer by layer synchronously, and the backfilling thickness of each layer of earthwork is controlled to be 0.3-0.5 m.
As a preferred technical scheme, in the step 5), after the ground beam region is reversely excavated to form the ground beam pouring groove, the ground beam pouring groove is trimmed and tamped, and then a layer of geotextile is laid in the ground beam pouring groove to prevent earthwork on two sides of the groove from collapsing or falling into the groove.
As a preferable technical scheme, in the step 6), each section of the ground beam reinforcement cage is transferred into the corresponding ground beam pouring groove by adopting hoisting operation.
The invention has the beneficial effects that:
1) According to the invention, the barrier is arranged at the position of the upright column, so that the foundation field is divided into the area inside the column and the area outside the column, and the reinforcing steel bar processing area is arranged outside the foundation field, so that three construction areas which are not interfered with each other are formed, each construction area is an individual body which exists independently, each individual body can be independently constructed, the time required by process conversion is reduced, and the construction period can be shortened to a great extent.
2) When the construction of the area outside the column is carried out, the back excavation is carried out on the ground beam area, so that the ground beam construction area is formed at one time, the time for excavating the ground beam is greatly saved, the repeated construction process of backfilling the ground beam soil after excavation is omitted, and the problem that the backfilling soil at the bottom of the ground beam cannot be tamped when the ground beam is constructed firstly and then the backfilling soil is backfilled is solved.
3) Compared with the traditional construction method, the construction method ensures the backfill quality, saves the construction period, and solves the problems that the foundation bolts pre-embedded by the stand columns are easy to damage, the earthwork backfill quality is poor and the earthwork is easy to sink when the earthwork is backfilled.
Drawings
FIG. 1 is a schematic view of the isolation of a construction area according to the present invention;
FIG. 2 is a schematic construction diagram of backfill of a construction pavement according to the present invention;
FIG. 3 is a schematic view of the construction of the present invention for synchronous construction in different areas;
FIG. 4 is a schematic view of the construction of the ground beam casting of the present invention;
the meanings of the marks in the above figures are as follows: 1-backfill, 2-foundation, 3-barrier, 4-column, 5-ground beam area, 6-column inner area, 7-column outer area, 8-reinforcing steel bar processing area, 9-ground beam pouring groove, 10-ground beam reinforcing cage, 11-ground beam point, 12-transverse construction pavement and 13-longitudinal construction pavement.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Examples
Referring to fig. 1 to 4, the method for constructing the foundation of the large-scale assembled steel plate box factory building by backfilling with high efficiency includes the following steps:
1) Foundation excavation
Paying off according to design requirements, and excavating a foundation of a plant foundation;
2) Bedding construction
Constructing a concrete cushion layer on the ground foundation, wherein an embedded part for fixing the inner side of the partition is arranged in the cushion layer (the installation position of the embedded part needs to be determined according to the position of the stand column and the size of the stand column construction channel);
3) Isolation of construction area
According to the design position of the upright column, the positions around the upright column are provided with the baffles 3 to isolate the column edge, so that the foundation field is divided into an in-column area 6 and an out-column area 7, a steel bar processing area 8 is arranged outside the foundation field, and meanwhile, the baffles 3 are provided with ground beam points 11 in advance; the inner side of the partition is fixed with an embedded part of the concrete cushion layer so as to prevent the partition from deviating from a set position due to extrusion of earthwork in construction; an upright post construction channel with the width of 0.4-0.8 m is reserved between the partition and the edge of the designed upright post, so that subsequent operations such as steel bar binding, mold filling and the like can be conveniently carried out on the area in the post by constructors; the height of the barrier is 10-30 cm higher than the height of backfill soil so as to prevent a large amount of soil from falling into the area in the column in the subsequent earthwork backfilling process;
4) Construction pavement backfill
Carrying out earthwork backfill on the transverse axis position of the foundation pit of the foundation to form a transverse construction access road 12, and then simultaneously carrying out earthwork backfill on two sides of the partition along the edge of the foundation and the edge of the transverse construction access road respectively so as to form a longitudinal construction access road 13 which is convenient for entering the partition for construction; wherein the width of the transverse construction access road is 4-6 m, the width of the longitudinal construction access road is 4-6 m, and the width of the longitudinal construction access road is not less than the width of the barrier;
5) Synchronous construction by regions
Afterwards, carry out the construction simultaneously in regional 6, the outer region 7 of post, reinforcing bar processing region 8 in the post, specifically include:
binding, molding and pouring steel bars of the short column in the area in the column, namely in the partition, and embedding ground beam steel bars in advance;
backfilling the residual earthwork in an area outside the column, namely a foundation field outside the barrier, wherein earthwork on two sides of the barrier is backfilled synchronously in a layered mode, the backfilling thickness of each layer of earthwork is controlled to be 0.3-0.5 m, after backfilling is finished, reverse excavation is carried out on a ground beam area according to ground beam points 11 marked on the barrier to form a ground beam pouring groove 9, then the ground beam pouring groove 9 is trimmed and tamped, and then a layer of geotextile is laid in the ground beam pouring groove to be used for pouring ground beam concrete, so that a ground beam construction area can be formed in a one-step pouring mode;
manufacturing the reinforcing steel bars required by ground beam construction outside a foundation field in a reinforcing steel bar processing area, and manufacturing a ground beam reinforcing cage 10, wherein the length of each section of ground beam reinforcing cage 10 corresponds to the length of each section of ground beam pouring groove 9;
6) Pouring of ground beam
Step 5) after the construction is finished, the baffle 3 installed at the position of the stand column is firstly removed, and after the baffle 3 is removed, the small range around the stand column, namely the construction channel of the stand column is internally backfilled manually, so that the whole construction progress is not influenced, and the small-range quality control is facilitated; and then transferring the ground beam reinforcement cage 10 into a ground beam pouring groove 9 on site through hoisting operation, connecting the ground beam reinforcement cage with ground beam reinforcements pre-embedded in short columns, and performing ground beam concrete pouring after acceptance check.
Claims (8)
1. The efficient backfill construction method of the large-scale assembled steel plate box factory building foundation is characterized by comprising the following steps of:
1) Foundation excavation
Paying off according to design requirements, and excavating a foundation of a plant foundation;
2) Bedding construction
Constructing a concrete cushion on the foundation;
3) Isolation of construction areas
Paying off and positioning the position of the upright column in the foundation pit of the foundation, installing baffles at the periphery of the upright column to isolate the edge of the column, dividing the foundation pit into an area inside the column and an area outside the column, arranging a reinforcing steel bar processing area outside the foundation pit, and simultaneously, marking a ground beam point in advance on the baffles; wherein, an upright post construction channel with the width of 0.4-0.8 m is reserved between the partition and the edge of the designed upright post;
4) Construction access road backfilling
Carrying out earthwork backfilling on the transverse axis position of the foundation pit of the foundation to form a transverse construction sidewalk, and then carrying out earthwork backfilling on two sides of the partition respectively along the edge of the foundation and the edge of the transverse construction sidewalk so as to form a longitudinal construction sidewalk convenient for entering the partition for construction;
5) Synchronous construction by regions
Afterwards, regional, the outer region of post, reinforcing bar processing region is under construction simultaneously in the post, specifically includes:
binding, molding and pouring steel bars of the short column in the area in the column, namely in the partition, and embedding ground beam steel bars in advance;
backfilling the residual earthwork in the area outside the column, namely the foundation field outside the barrier, and after backfilling, reversely excavating the area of the ground beam according to the ground beam point marked on the barrier to form a ground beam pouring groove for pouring ground beam concrete, so that the construction area of the ground beam can be formed by pouring at one time;
manufacturing the reinforcing steel bars required by ground beam construction outside a foundation field in a reinforcing steel bar processing area, and manufacturing ground beam reinforcing cages, wherein the length of each section of ground beam reinforcing cage corresponds to the length of each section of ground beam pouring groove;
6) Pouring of ground beam
After the construction in the step 5) is finished, the separating barriers installed at the positions of the stand columns are firstly removed, then the ground beam reinforcement cage is transferred into a ground beam pouring groove on the site and is connected with ground beam reinforcements pre-embedded in the short columns, and the ground beam concrete pouring is carried out after acceptance check is qualified.
2. The efficient backfill construction method for the large-scale assembly type steel plate box factory building foundation according to claim 1, characterized in that in the step 3), the baffles are made of steel templates.
3. The method for efficiently backfilling the foundation of the large-scale assembled steel plate box factory building according to claim 1, wherein in the step 2) of constructing the cushion layer, embedded parts for fixing the cushion layer with the inner side of the barrier are arranged in the cushion layer.
4. The efficient backfill construction method for the large-scale assembled steel plate box factory building foundation according to claim 1, characterized in that in the step 4), the width of the transverse construction access way is 4-6 m, the width of the longitudinal construction access way is 4-6 m, and the width of the longitudinal construction access way is not less than the width of the barrier.
5. The efficient backfill construction method for the large-scale assembled steel plate box factory building foundation according to claim 1, characterized in that in the step 3), the height of the barrier is 10-30 cm higher than the height of backfill soil.
6. The efficient backfill construction method for the large-scale assembled steel plate box factory building foundation according to claim 1, characterized in that in the step 5), when the residual earthwork is backfilled in the area outside the column, earthwork on two sides of the partition is backfilled synchronously in a layered mode, and the backfilling thickness of each layer of earthwork is controlled to be 0.3-0.5 m.
7. The efficient backfilling construction method of the large-scale assembled steel plate box factory building foundation according to claim 1, wherein in the step 5), after the ground beam region is reversely excavated to form the ground beam pouring groove, the ground beam pouring groove is trimmed and tamped, and then a layer of geotextile is laid in the ground beam pouring groove.
8. The efficient backfill construction method for the large-scale assembly type steel plate box factory building foundation according to claim 1, characterized in that in the step 6), each section of the ground beam reinforcement cage is transferred to the corresponding ground beam pouring groove by adopting hoisting operation.
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| CN115075263B (en) * | 2022-05-22 | 2023-09-26 | 北京金港场道工程建设有限公司 | Airport pavement section device, construction method and backfill reverse construction method die device for airport |
| CN114809056A (en) * | 2022-05-24 | 2022-07-29 | 中建八局南方建设有限公司 | Mounting method and mounting system based on beam-slab separation |
| CN115324070A (en) * | 2022-08-23 | 2022-11-11 | 山东建筑大学 | Spiral anchor foundation pit supporting structure and construction method |
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| CN108222046A (en) * | 2016-12-09 | 2018-06-29 | 李聪 | A kind of method of construction of prefabricated isolated footing |
| CN109235493A (en) * | 2018-09-04 | 2019-01-18 | 中建八局第三建设有限公司 | Basement beam slab is backbreak and short formwork construction method in a kind of contrary sequence method |
| CN109763508A (en) * | 2019-01-26 | 2019-05-17 | 中煤地建设工程有限公司 | A kind of domatic isolated footing structure |
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