阅读说明：本技术 大型装配式钢板箱厂房基础的高效回填施工方法 (Efficient backfill construction method for large-scale assembled steel plate box factory building foundation ) 是由 曾凡韧 张增伟 蒋卓尔 黄家同 张胥 廖纪明 雷凯 李嘉颖 陈翔 赵宇 戴喜盈 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种大型装配式钢板箱厂房基础的高效回填施工方法,其特征在于包括如下步骤：1)地基开挖：根据设计要求放线,对厂房基础的地基进行开挖；2)垫层施工：于地基底施工混凝土垫层；3)施工区域隔离：在地基基坑内对立柱位置进行放线定位,在立柱四周位置安装隔挡对柱边进行隔离,使地基场内划分成柱内区域、柱外区域,且在地基场外设置钢筋加工区域,同时在隔挡上提前标识地梁点；4)施工便道回填；5)分区域同步施工；6)地梁浇筑。本发明解决了在大型厂房地梁浇筑环节,工序交叉多,地梁浇筑之后,土方回填难度高、质量差、易沉陷的问题。(The invention discloses a high-efficiency backfill construction method for a large-scale assembled 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; 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 the 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.)

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 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) 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, and then simultaneously carrying out earthwork backfill on the two sides of the partition along the edge of the foundation and the edge of the transverse construction access respectively so as to form a longitudinal construction access 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 steel bars required by ground beam construction outside a foundation field in a steel bar processing area, and manufacturing a ground beam steel reinforcement cage, wherein the length of each section of ground beam steel reinforcement cage corresponds to the length of each section of ground beam pouring groove;

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.

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 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), an upright post construction channel with the width of 0.4-0.8 m is reserved between the baffle and the edge of the designed upright post.

4. The efficient backfill construction method for the foundation of the large-scale assembled steel plate box factory building according to claim 1, characterized in that in the step 2), embedded parts for fixing with the inner sides of the baffles are arranged in the cushion layer during cushion layer construction.

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 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.

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 3), the height of the barrier is 10-30 cm higher than the height of backfill soil.

7. 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.

8. The method for backfilling the foundation of a large-scale assembled steel plate box factory building according to claim 1, wherein in the step 5), after the ground beam region is excavated reversely to form the ground beam casting groove, the ground beam casting groove is trimmed and tamped, and then a layer of geotextile is laid in the ground beam casting groove.

9. 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 into the corresponding ground beam pouring groove by adopting a hoisting operation.

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 processes, and the processes 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, completing foundation pouring, then pouring the upright posts and the ground beams, and finally backfilling earthwork after all pouring and curing are completed. 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 quality of the backfill soil cannot be guaranteed.

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;

3) isolation of 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) 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, 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 steel bars required by ground beam construction outside a foundation field in a steel bar processing area, and manufacturing a ground beam steel bar cage, wherein the length of each section of ground beam steel bar cage corresponds to the length of each section of ground beam pouring groove respectively, so that each section of ground beam steel bar cage is conveniently and integrally hoisted, and the time for binding the steel bars in the ground beam pouring grooves independently 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 preferable technical scheme, in the step 3), the separating baffle is made of a steel template.

As a preferred 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), an embedded part for fixing the inner side of the barrier is arranged in the cushion layer.

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.

According to a preferable technical scheme, in the step 3), the height of the barrier is 10-30 cm higher than the height of the backfill soil.

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, 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 illustration 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 construction diagram of the regional synchronous construction of the present invention;

FIG. 4 is a schematic construction diagram of the ground beam pouring in the invention;

the meanings of the marks in the above figures are as follows: 1-backfill, 2-foundation, 3-barrier, 4-column, 5-ground beam region, 6-column inner region, 7-column outer region, 8-reinforcing steel bar processing region, 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 should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 simplicity of description, but do not indicate or imply that the device or element being 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. 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 a large-scale assembled steel plate box factory building foundation by means of high-efficiency backfilling comprises 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 base, wherein an embedded part for fixing the inner side of the barrier 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 baffle is fixed with an embedded part of the concrete cushion layer so as to prevent the baffle from deviating from a set position due to earthwork extrusion 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, formwork filling and the like can be conveniently carried out on the area in the post by constructors; the height of the partition is 10-30 cm higher than the height of backfill soil, so that a large amount of soil is prevented from falling into an 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; 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 partition;

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 concrete pouring of the ground beam, so that a ground beam construction area can be formed in a one-step pouring mode;

manufacturing steel bars required by ground beam construction outside a foundation field in a steel bar processing area, and manufacturing a ground beam steel reinforcement cage 10, wherein the length of each section of ground beam steel reinforcement 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 upright post is firstly removed, and after the baffle 3 is removed, the small range around the upright post, namely the construction channel of the upright post is backfilled manually, so that the whole construction progress is not influenced, and the quality control in the small range 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.