CN110700623A

CN110700623A - Building integral displacement construction method based on BIM

Info

Publication number: CN110700623A
Application number: CN201910835310.8A
Authority: CN
Inventors: 刘文峰; 方双双
Original assignee: China MCC17 Group Co Ltd
Current assignee: China MCC17 Group Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-01-17

Abstract

The invention provides a building integral shift construction method based on BIM, utilizing Revit to establish an information model of a building to be integrally shifted, simulating to adopt an underpinning technology, separating an upper structure from a foundation, installing a walking machine, applying a fixed force to achieve horizontal shift, installing a jacking mechanism to achieve vertical shift and adjust inclination, wherein the jacking mechanism comprises longitudinal and transverse movement, steering or movement and steering, a plurality of horizontal sensors are arranged on the top surface of an underpinning beam and are associated with corresponding positions of the model in real time, when a preset horizontal plane is changed, the BIM model gives an alarm to remind of checking the corresponding positions of site construction and correct deviation, the invention realizes the whole process of simulation construction before construction, is beneficial to planning construction difficulty and key in advance, avoids uncertain risks, and can be flexibly disassembled and assembled by applying a combined lower walkway plate and a movable counter force support in integral horizontal shift, the reversing mechanism is repeatedly used, when the steering and the shifting are needed, the local reversing operation can be carried out, and the safe, reliable and convenient reversing is realized.

Description

Building integral displacement construction method based on BIM

Technical Field

The invention relates to the field of building construction, in particular to a building integral displacement construction method based on BIM, which is suitable for the integral migration construction of the existing building.

Background

China is in a new stage of reformation and opening, the city construction process is rapidly developed, and part of old buildings are frequently required to be dismantled for old city transformation, road widening and the like. When buildings needing protection, such as historical relic and historic buildings, conflict between the historical relic building protection and city construction is generated, and the adoption of the integral building displacement technology to integrally displace the historical relic building needing protection to different places for protection is undoubtedly the optimal way for solving the conflict.

The integral displacement technology of building is characterized by that under the principle of keeping original building integrity and usability unchanged and making structure safe and reliable it can be moved from original site to new site, and relates to the fields of foundation, steel structure, concrete structure and brick-wood structure, etc. and contains the disciplines of soil mechanics, structure mechanics and structure dynamics, etc. The jacking mechanism is arranged to achieve vertical displacement and enable the inclination to be adjusted, and the jacking mechanism comprises longitudinal and transverse movement, steering or movement and steering.

Bim (building information), which is generally translated into a building information model. The BIM technology is the latest and largest technological revolution in the engineering and building industry. At present, most of the whole displacement of buildings adopts a traditional construction method, and the planning in the early stage of construction, the management of various information in the construction and the construction control cannot be combined in time along with the construction progress, so that the comprehensive and systematic management of the information is realized. In view of this, the BIM technology is used for carrying out integral displacement protection construction of the existing building, a building information model can be used for simulating the whole construction process, the construction difficulty and key points are planned in advance, the construction safety is effectively controlled, the cost is reduced, and the construction period is saved. Based on the BIM concept, the construction control method for the integral displacement of the building is integrated with information management, so that the construction management is more scientific.

Disclosure of Invention

Aiming at the problem which needs to be solved urgently in the integral displacement construction of the building, the invention provides a building integral displacement construction method based on BIM, which can simulate the whole construction process, plan construction difficulties and key points in advance, effectively control construction safety, reduce cost and save construction period.

In order to solve the technical problems, the invention adopts the following technical scheme that the building integral displacement construction method based on the BIM comprises the following steps:

firstly, evaluating in an early stage and designing key points of integral displacement;

feasibility analysis and comprehensive economic evaluation are carried out before the whole building is displaced, detection, rechecking and identification are carried out according to the current relevant national standards and standards, the displacement design can be carried out on the building suitable for the whole displacement through the comprehensive evaluation, and the whole building displacement design comprises the following steps: underpinning, shifting lines and tracks, jacking height, temporarily reinforcing and supporting, building a foundation, connecting after in place and the like, and the building is located in an earthquake area and is identified according to earthquake identification standards, and earthquake reinforcement treatment is carried out when the building is not met.

Step two, the construction of underpinning the beam;

firstly, a hole with a certain length is dug on a building wall on a certain horizontal plane required by integral displacement by using manpower or machinery to form a unit beam section, after a beam bottom is processed, reinforcing steel bars, a formwork and concrete are bound in the unit beam section to complete a unit beam section, all the unit beam sections are mutually connected, and finally a closed underpinning beam is formed; the underpinning of the frame column is carried out at intervals, in order to keep the size of a column net of an original frame, a horizontal rod piece is arranged for positioning before the column is cut off, adjacent columns cannot be underpinned simultaneously, temporary supporting measures are arranged if necessary, if a brick column or a steel pipe is adopted for supporting, the underpinning of the frame column is realized by depending on a post-cast bracket column because the frame column mainly transfers the load of an upper structure, therefore, the post-cast bracket column takes the coordination work of new and old concrete into consideration, the treatment measures are enhanced in the aspects of reinforcing steel bar arrangement, reinforcing steel bar anchoring or welding length, and after the underpinning of the frame column is finished, the frame column can be cut off after the post-cast concrete part reaches.

Step three, integral displacement construction;

according to the displacement requirement, the integral displacement is divided into integral horizontal displacement and integral vertical displacement, the integral horizontal displacement is divided into a front-mounted type and a rear-mounted type according to the working procedures, the front-mounted type is arranged during the construction of the underpinning beam and is carried out along with the construction of the underpinning beam 2, the rear-mounted type is carried out after the construction of the underpinning beam is completed, after the design strength is reached, the integral vertical displacement is adopted, a certain space is reserved between the underpinning beam and the foundation, so that the one-time integral arrangement is carried out, when the front-mounted type walking mechanism is constructed, the length of a walking board in the walking mechanism is considered for the beam section division of the underpinning beam unit. When the rear-mounted walking mechanism is constructed, a jack of the mechanism is reserved for jacking the hole and ensuring a certain hole height due to the vertical displacement requirement, and the number of reserved holes is calculated and determined according to the total load of the building; the whole vertical displacement adopts jack arrangement and can be arranged according to line load distribution or concentrated force position, in mixed structure, the distance between common jacks is 1.5-1.7 m, the jacks are distributed along the wall body, the hole of the wall body is avoided, the jack with large working load can be properly encrypted or used instead of the jack with large working load at the relatively concentrated position of the load, the jack arrangement is mainly concentrated around the column in the frame structure, and the synchronous jacking of the jacks and the stability of the supporting pad are ensured. When the accumulated jacking height exceeds the stroke of the jack, the jack is required to return, attention should be paid to the fact that adjacent jacks cannot be synchronously performed during return, a wedge block is adopted to protect a supporting pad before return and ensure stable stress, after the jacking is accumulated to reach the design height, the jacks are immediately supported by cushion blocks at the main stress position and are rapidly connected structurally, the jacks can be detached in batches only after structural connection is completed and certain strength is achieved, a plurality of horizontal sensors are arranged on the top surface of a underpinning beam and are associated with corresponding positions of the model in real time, and when the initially set horizontal plane is changed, the BIM model gives an alarm to remind a user of checking corresponding positions of site construction and correcting deviation.

Step four, connection processing after integral displacement;

after the whole body is vertically displaced, the connection is generally processed by the cast-in-place of reinforced concrete. When each side of the column main reinforcement is not more than four, the main reinforcement is welded up and down, the connecting area stirrups are used for encryption, and the concrete strength grade is improved; when each side of the column main rib is more than four, the local reinforcement treatment is carried out on the section of the column in addition to the treatment, and a section enlarging method or a steel-wrapped reinforcement method can be adopted.

Preferably, the construction method utilizes Revit to establish an information model of a building simulating overall displacement, the simulation adopts an underpinning technology, an upper structure is separated from a foundation, a walking machine is installed, the horizontal displacement is achieved after a fixed force is applied, a jacking mechanism is installed to achieve vertical displacement and enable the inclination to be adjusted, the underpinning method comprises longitudinal and transverse movement, steering or movement and steering, in addition, a plurality of horizontal sensors are arranged on the top surface of the underpinning beam and are in real-time correlation with the corresponding positions of the model, when the preset horizontal plane is changed, the BIM model sends an alarm to remind a user of checking the corresponding positions of site construction, and deviation is corrected.

Preferably, the underpinning beam constructed in advance is used as a bracket, and the walking mechanism arranged between the bracket and the foundation or the translation track is used for horizontally displacing under the pushing of an external power or vertically displacing by using a jacking mechanism arranged between the bracket and the foundation.

Preferably the underpinning beam cuts the building along a horizontal plane to form a planar cradle and transfers the superstructure load to the cradle to separate the superstructure from the foundation to form a displaceable unit, typically of reinforced concrete construction, built in sections.

Preferably, rollers are arranged between the underpinning beam and the foundation or the translation track, when the applied external power overcomes the resistance, the horizontal displacement can be implemented, a temporary translation track is arranged between the building and the position, a permanent foundation is built at the position, and the building is horizontally displaced to the position.

Preferably, the vertical displacement is effected when the jacking force is greater than the total load of the building, with the jacks being disposed between the underpinning beam and the foundation.

Preferably, the jacking mechanism comprises a mechanical screw jack, a supporting pad box, an iron plate and the like, a hydraulic jack can be locally adopted for auxiliary operation, and the rated bearing capacity of the commonly adopted screw jack is 320-500 kN.

The building integral displacement construction method based on the BIM has the beneficial effects that:

(1) the whole process of simulation construction before construction is realized, construction difficulty and key points are planned in advance, and uncertain risk outburst is avoided;

(2) the building does not need to be dismantled, the upper structure of the building is kept in the original state, and the use function of the building is kept or recovered;

(3) in the integral horizontal displacement, the combined lower walkway plate and the movable counter-force support can be flexibly assembled and disassembled and can be repeatedly utilized, and when the steering displacement is needed, the local reversing operation can be carried out, so that the safe, reliable and convenient reversing is realized.

Drawings

FIG. 1 is a technical framework diagram of a construction information model implementation of the present invention.

Fig. 2 is an overall process flow diagram of the global shift of the present invention.

FIG. 3 is a flow chart of the reinforced concrete underpinning beam construction process of the present invention.

FIG. 4 is a flow chart of the construction process of the whole horizontal displacement of the building.

FIG. 5 is a flow chart of the construction process of the whole vertical displacement of the building.

FIG. 6 is a schematic representation of a underpinning beam construction joint of the present invention.

Fig. 7 is a schematic representation of the frame post underpinning of the present invention.

Figure 8 is a connection diagram of the load bearing wall of the present invention.

Detailed Description

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

As shown in FIG. 1, the invention provides a BIM-based integral displacement construction method for a building, which comprises the following steps:

feasibility analysis and comprehensive economic evaluation should be carried out before the whole building is displaced. The building can be subjected to detection, rechecking and identification according to the current relevant national standards and standards, and the building suitable for integral displacement can be subjected to displacement design through comprehensive evaluation.

The overall displacement design of the building comprises the following steps: underpinning, shifting lines and tracks, jacking height, temporarily reinforcing and supporting, building a foundation, connecting after in place and the like, and the building is located in an earthquake area and is identified according to earthquake identification standards, and earthquake reinforcement treatment is carried out when the building is not met.

Step two, the construction of underpinning the beam;

as shown in fig. 3, a hole with a certain length is cut on a building wall on a certain horizontal plane required by integral displacement by using a worker or a machine to form a unit beam section, and after a beam bottom is processed, reinforcing steel bars are bound in the unit beam section, a formwork is erected, and concrete is poured to complete the unit beam section. All the unit beam sections are connected with each other to finally form a closed underpinning beam 2-bracket.

(1) Division of underpinning beam 2 units

Because the wall bears the load of an upper structure and the dead weight of the wall, when the underpinning beam 2 is constructed, the cutting length of the wall cannot be increased without limit, the wall is generally divided into a plurality of units according to the comprehensive consideration of factors such as the number of layers of a building, the floor structure, the primary and secondary relationship of the bearing of the wall, the strength of the masonry and the like, the length of each unit is generally between 1500-2000 mm, an independent unit is arranged at the position of the crossed wall, each unit beam section is constructed at intervals, and the concrete strength of the adjacent unit beam section can be constructed only after reaching the strength of the masonry.

(2) Connection of unit beams

The main reinforcement between the unit beam sections adopts double-sided welding, the treatment of the construction joints 18 is strictly executed according to relevant construction specifications, before the post-cast unit beam sections are cast and tamped with concrete, garbage, cement films, loose gravels and soft concrete layers on the surfaces of the construction joints 18 are removed, the surfaces are roughened, washed clean by water and fully watered to be wet, and the general wetting time is not less than 24 hours. The construction joint is shown in figure 6.

The jack position should avoid the position of the construction joint 18 during vertical displacement, and the jack position should be arranged in the middle of the unit beam section generally.

(3) Concrete casting of unit beam sections

The top surface of the unit beam section beam is guaranteed to be closely connected with the wall body. When the formwork is erected, a horn mouth is adopted, and concrete with the height of 200mm is over-poured.

(4) Underpinning of frame columns

Referring to fig. 7, the method for underpinning the frame column can be divided into two methods, namely a welding method and a bar planting method.

1) The frame column underpinning construction should be carried out at intervals, and in order to keep the column net size of the original frame, a horizontal rod piece is arranged for positioning before the column is cut off. Adjacent columns must not be underpinned simultaneously. Temporary supporting measures such as brick columns or steel pipe supporting are arranged when necessary. Because the frame column mainly transfers the load of the upper structure, the underpinning of the frame column is realized by depending on the post-cast corbel column, therefore, the post-cast corbel should consider the coordination work of new and old concrete, and the treatment measures are strengthened in the aspects of reinforcing steel bar arrangement, reinforcing steel bar anchoring or welding length.

2) After the frame column underpins, after the post-cast concrete part reaches the design strength, the frame column can be cut off, manual cutting is generally adopted for cutting off, and mechanical drilling is assisted to prevent overlarge vibration.

3) The column should be moved as soon as possible after being cut off to prevent excessive deformation.

(5) Selection of integral horizontal displacement track foundation

And determining the material of the foundation according to the conditions of site construction, geological survey data, total building load, structural condition, importance level and the like. The material can be selected from steel structure, reinforced concrete structure, stone structure, wood structure and various combined structures. The bearing capacity of the structure can be met when the structure is required, construction is convenient, and the structure can be repeatedly used. According to the design of the whole displacement scheme, A50mm steel pipes are embedded in the foundation at certain intervals and used for fixing the travelling mechanism.

(6) Integral horizontal displacement track foundation treatment

In the process of long-distance displacement, the lack of detailed geological survey data of the track foundation can be known in detail before foundation construction, and whether holes and blind ditches exist or not can be checked by methods such as drill rod detection and the like. The soft foundation should be treated and tested for on-site loading.

(7) Strengthening of buildings before translation

1) In the mixed structure, the wall body with the door and window holes can be temporarily filled and reinforced. For a hybrid structure with rigid upper part and flexible lower part, a transverse rigidity reinforcing measure should be adopted.

2) In the frame structure, brick walls, brick columns, reinforced concrete columns or steel pipes can be adopted for temporary reinforcement so as to decompose the concentrated force.

Step three, integral displacement construction;

according to the shifting requirement, the integral shifting is divided into integral horizontal shifting (rotary shifting) and integral vertical shifting;

(1) global horizontal displacement (global translation), as shown in fig. 4;

1) arrangement of running gear

The method is divided into 2 types of front-mounted type and rear-mounted type according to the process. The preposed type is arranged when the underpinning beam 2 is constructed and is constructed along with the underpinning beam 2. The rear-mounted type underpinning beam 2 is completely constructed, and after the design strength is reached, the whole body is vertically displaced, so that a certain space is formed between the underpinning beam and the foundation, and the one-step integral arrangement is carried out.

When the front-mounted travelling mechanism is constructed, the length of the walkway plates in the travelling mechanism is considered for dividing the unit beam sections of the underpinning beam 2, and the level consistency of the walkway plates is ensured. When the rear-mounted walking mechanism is constructed, a jack of the mechanism is reserved for jacking the hole and ensuring a certain hole opening height due to the vertical displacement requirement. The number of reserved holes is determined by calculation according to the total load of the building.

The rollers 4 in the running mechanism need to bear all the upper load, the number and the distance of the rollers are determined according to the weight of the building, the materials of the rollers 4 are considered to be displaced remotely or reused for many times, and solid steel rollers are generally selected. When the rear-mounted walking structure is constructed, the building needs to be subjected to integral descending treatment after the walking structure is installed, the operation of the jacks is uniform and balanced, and the damage of the overload of local jacks is prevented.

2) Application of external power

The hydraulic jack system is preferably adopted for applying the external power, and in order to ensure the accuracy of jacking force, the jack and the pressure gauge are matched for verification and are labeled, and the jack and the pressure gauge are matched for use in actual construction.

The external power is distributed according to the actual action point, and the distribution principle is as follows: the applied power applied at each point of action must be proportional to the strategy by which the building superstructure is transferred to the underpinning beams 2. The action points of the external power must coincide with the axes of the building as much as possible, and the distribution of the action points should comprehensively consider the stress according to the arrangement of the underpinning beams 2 and take the principle of symmetry and uniformity as a principle.

3) Horizontal error between upper and lower walkways and treatment measure

When a building is underpinned, the building is generally divided into dozens of units for construction, and certain accumulated errors necessarily exist. The maximum value of the actual construction error can reach 20mm, and the maximum value is processed by enhancing leveling measurement, repeatedly checking and multipoint calibration. For long-distance horizontal displacement, when the conditions permit, a rear walking mechanism is preferentially adopted, and the horizontal error of the rear walking mechanism can be adjusted by utilizing a cushion layer when the walking mechanism is arranged.

4) Deviation and correction during integral shift

Due to the fact that the upper and lower walkway plates are not parallel locally, uneven stress of the rolling shaft is generated, the rolling shaft is not perpendicular to the axis of the track plate during displacement, and the building is deviated during displacement as a result. After deviation occurs, the roller is used for correcting uniformly according to the deviation direction, and timely deviation is monitored during shifting so as to prevent overlarge deviation.

5) Running gear replacement during steering

When the direction conversion is needed in the overall horizontal displacement, the method can be completed by adopting a method of replacing the travelling mechanism. The translation track should reserve the jack hole in the switching-over area, can adopt mechanical jack to carry out local or whole jacking after the building is in place, adopts the local switching-over replacement to the running gear, can adopt local or whole descending method after the running gear switching-over is accomplished, unloads the jack load, makes the underpinning roof beam 2 support on the running gear.

6) Monitoring during displacement

And when the whole body is horizontally shifted, observing and recording the actual force applied to each action point of the applied power, and judging the abnormal condition during shifting according to the change of the applied power. Meanwhile, a ruler and a theodolite are adopted to monitor the building deviation in the shifting process, and the foundation settlement of the translation track is monitored by utilizing level observation. Meanwhile, the observation of the upper structure is enhanced, and potential safety hazards are found in time.

(2) The whole is vertically displaced (whole jacking), as shown in fig. 5.

1) Jacking mechanism

The jacking mechanism consists of a mechanical screw jack, a supporting pad box, an iron plate and the like, and the hydraulic jack can be used for auxiliary operation locally. The rated bearing capacity of a commonly used screw jack is 320-500 kN. When the hydraulic jack is adopted, the phenomenon of backward travel caused by oil leakage should be noticed. The cushion box generally has three different specifications to meet the requirements of the stroke of each jack, and the weight of the cushion box is not too large to meet the requirements of manual transportation. The cushion box must have a certain bearing degree and a flat surface, and C20 concrete is generally filled in the steel plate box.

The jack arrangement can be arranged according to line load distribution or concentrated force positions, in a mixed structure, the distance between common jacks is 1.5-1.7 m, the jacks are distributed along a wall body, a hole of the wall body is avoided, the jacks with large working loads can be properly encrypted or used at the relatively concentrated positions of the loads, the jack arrangement is mainly concentrated around a column in a frame structure, and when conditions allow, the jacks can be arranged at the bottom of the column.

3) Jacking operation

The synchronous jacking of the jack and the stability of the supporting cushion are ensured. When the accumulated jacking height exceeds the stroke of the jack, the jack is required to return, attention is paid to the fact that adjacent jacks cannot be synchronously carried out during return, a wedge block is adopted to protect a supporting pad before return, and the stable stress is guaranteed. After the jacking accumulation reaches the designed height, the main stressed part is immediately supported by a cushion block, and the structural connection treatment is rapidly carried out. After the structural connection is completed and a certain strength is reached, the jacks can be removed in batches.

4) Jacking monitoring

A plurality of horizontal sensors are arranged on the top surface of the underpinning beam 2 and are associated with the corresponding positions of the model in real time, and when the initially set horizontal plane changes, the BIM model gives an alarm to remind a user of checking the corresponding positions of site construction and correcting deviation.

(3) Integral rotary displacement

1) Rotary shift axis setting

The rotational displacement is preferably a fixed axis rotation. The axle should be securely attached to the foundation and should have sufficient rigidity to resist the unbalanced horizontal forces generated during rotational displacement without horizontal displacement or deformation. The underpinning system is reliably connected with the axis outer cylinder, has enough in-plane rigidity, and can reliably transmit horizontal unbalanced force in the rotating process to the axis.

2) Arrangement of the lower track for rotary displacement

The deviation is not allowed in the process of the fixed-axis rotary displacement, and the rotary displacement underpinning beam and the arc-shaped lower track are subjected to accurate lofting according to the actual plane size of the building. When the underpinning beam is a non-arc short straight beam, the width of the top surface of the arc lower track is determined according to the rotating coverage surface of the corner of the underpinning beam. The roll shaft should be adjusted to be perpendicular to the arc-shaped lower track at any time in the rotating and shifting process so as to reduce unbalanced force.

3) Arrangement of the upper rail on the rotary displacement

Compared with the common integral translation engineering, the fixed-axis rotation needs to be provided with one more upper track beam for rotation, and the action and stress characteristics of the fixed-axis rotation are the same as those of the translation upper track beam.

4) Application of rotational displacement plus power

The external power for rotary displacement should preferably adopt a tension system consisting of a tension hydraulic jack and a steel cable, and the steel cable should be tensioned along an arc according to the radius of a force application point. The applied force can be estimated by multiplying the calculated value by a factor of 1.5.

The applied power points should be evenly arranged according to the gravity transmitted from the superstructure of the building to the underpinning beam, and when the underpinning system has better in-plane rigidity, the applied power points can be arranged far away from the axis. The action direction of the external power is always vertical to the connecting line of the action point and the axis.

5) Monitoring during rotational displacement

Besides monitoring according to the requirement of horizontal displacement during the whole rotary displacement, special attention should be paid to monitoring of the connection member of the underpinning system and the axis and the working state of the axis. If large deformation and crack are generated, adjustment measures should be taken immediately.

Step four, connection processing after integral displacement;

(1) connection of load-bearing walls

Masonry materials not lower than the requirements of the original wall body are adopted, masonry mortar between the top of the new wall body and the bottom of the underpinning beam 2 is full, and if the interval is less than or equal to the thickness of bricks, fine aggregate concrete is adopted for filling and compacting.

(2) In the integral vertical displacement, the jack cannot be detached at one time after jacking in place, the wall building cannot be completed at one time, the building is generally divided into 2-3 times, and when the overlapping building quality of adjacent walls cannot be guaranteed, plain concrete can be poured and tamped to guarantee the integrity of the wall (as shown in figure 8).

(3) Connection of frame columns

After the whole horizontal displacement is in place, when the clearance between the column bottom and the foundation surface is small, the embedded steel bars can be adopted for welding, and when the distance is large and has a certain height, the steel bars can be adopted for connection.

After the whole body is vertically displaced, the connection is generally processed by the cast-in-place of reinforced concrete. When each side of the column main reinforcement is not more than 4, the main reinforcement is welded up and down, the connecting area stirrups are encrypted, and the concrete strength grade is improved; when each side of the column main reinforcement is more than 4, the local reinforcement treatment is carried out on the section of the column in addition to the treatment, and a section enlarging method or a steel wrapping reinforcement method can be adopted.

The pouring quality of the concrete is noticed, and gaps between new and old concrete are prevented.

The foregoing description of the embodiments is provided to enable one of ordinary skill in the art to understand and apply the techniques herein, and it is to be understood that various modifications may be readily made to the embodiments, and that the general principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present disclosure is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present disclosure.

Claims

1. A building integral displacement construction method based on BIM is characterized by comprising the following steps:

Step two, the construction of underpinning the beam;

Step three, integral displacement construction;

Step four, connection processing after integral displacement;

2. The BIM-based integral displacement construction method for the building as claimed in claim 1, wherein: the construction method comprises the steps of establishing an information model of a building to be integrally displaced by Revit, simulating to adopt an underpinning technology, separating an upper structure from a foundation, installing a walking machine, applying a fixed force to horizontally displace, installing a jacking mechanism to vertically displace and adjust the inclination, wherein the elevating mechanism comprises longitudinal and transverse movement, steering or movement and steering, in addition, a plurality of horizontal sensors are arranged on the top surface of the underpinning beam and are in real-time correlation with the corresponding positions of the model, and when the initially set horizontal plane changes, the BIM model gives an alarm to remind a user to check the corresponding positions of site construction and correct the deviation.

3. The BIM-based integral displacement construction method for the building as claimed in claim 1, wherein: the underpinning beam constructed firstly is used as a bracket, and a walking mechanism arranged between the bracket and a foundation or a translation track is used for horizontally displacing under the pushing of an external power or vertically displacing by a jacking mechanism arranged between the bracket and the foundation.

4. The BIM-based integral displacement construction method for the building as claimed in claim 1, wherein: the underpinning beam cuts the building along a horizontal plane to form a planar carrier, and the superstructure load is transferred to the carrier to separate the superstructure from the foundation to form a displaceable unit. The underpinning beam is generally of a reinforced concrete structure and is constructed in sections.

5. The BIM-based integral displacement construction method for the building as claimed in claim 1, wherein: the roller is arranged between the underpinning beam and the foundation or the translation track, when the applied external power overcomes the resistance, the horizontal displacement can be implemented, the temporary translation track is arranged between the building and the in-place position, the permanent foundation is built at the in-place position, and the building is horizontally displaced to the in-place position.

6. The BIM-based integral displacement construction method for the building as claimed in claim 5, wherein: after the jack is arranged between the underpinning beam and the foundation, when the jacking force is greater than the total load of the building, the vertical displacement can be implemented.

7. The BIM-based integral displacement construction method for the building as claimed in claim 1, wherein: the jacking mechanism comprises a mechanical screw jack, a supporting pad box, an iron plate and the like, a hydraulic jack can be used for auxiliary operation locally, and the rated bearing capacity of the commonly used screw jack is 320-500 kN.