CN116971490A - Grid jacking construction process and electromechanical cooperation installation method thereof - Google Patents

Abstract

The application discloses a grid jacking construction process and an electromechanical cooperation installation method thereof, and relates to the technical field of grid jacking construction. The grid jacking construction process divides areas before construction, and the area division divides the construction areas into the grid type and the construction environment: the grid frame of the area I is a regular rectangle; the grid frame of the II area is an irregular rectangle; the III area is the III area except the I area and the II area; respectively carrying out jacking point layout on each region; the grid jacking construction process adopts a jacking system to jack up. According to the application, the net frame ground assembling and net frame high-altitude scattered splicing construction is adopted, so that the lifting operation can be better performed, the net frame high-altitude scattered splicing construction is suitable for different construction environments due to the controllable ground assembling size, the net frame high-altitude scattered splicing construction can be complemented and assembled according to a designed structure, and the workload of the follow-up high-altitude scattered splicing construction is greatly reduced due to the fact that the main part is assembled on the ground.

Description

Grid jacking construction process and electromechanical cooperation installation method thereof

Technical Field

The application relates to the technical field of grid jacking construction, in particular to a grid jacking construction process and an electromechanical cooperation installation method thereof.

Background

The grid construction is a common ring in building construction, and because the grid is usually erected at the top of the building, the grid is usually directly lifted to the corresponding position for connection construction during construction, or is sequentially installed from outside to inside at a high place, and finally a grid structure is formed; both the two methods can meet the construction requirements, but the size of the finished net rack is larger, and the limitation in hoisting is larger; the method for splicing and installing the high position from outside to inside avoids the problems possibly encountered during hoisting, but has the advantages of high construction strength and low construction efficiency.

Through retrieval, the patent with the Chinese patent application number of CN201510558274.7 discloses a high-altitude bulk construction method of a steel structure net frame, which comprises the following steps of: step 1, dividing a steel structure net rack into a starting net rack and a subsequent net rack; step 2, erecting a scaffold construction platform at the starting grid position, and then constructing the starting grid by utilizing the scaffold construction platform; step 3, constructing a subsequent net rack by using the starting net rack as an operation platform by constructors; in the steps, before the construction of the starting net rack and the subsequent net rack, the bolt balls, the chords and the web members of the foundation parts are spliced into a combined unit on the ground, and the combined unit is hoisted to a construction position and then the splicing construction of the starting net rack and the subsequent net rack is carried out. The overhead bulk construction method of the net frame in the patent has the following defects: under the condition of large-area construction, the mode has high construction strength and low construction efficiency, and therefore, the mode needs to be improved.

Disclosure of Invention

The application aims to solve the defects in the prior art, and provides a grid jacking construction process and an electromechanical cooperation installation method thereof.

In order to achieve the above purpose, the present application adopts the following technical scheme:

the grid jacking construction process divides areas before construction, and the area division divides the construction areas into the grid type and the construction environment:

the grid frame of the area I is a regular rectangle;

the grid frame of the II area is an irregular rectangle;

the III area is the III area except the I area and the II area;

respectively carrying out jacking point layout on each region;

the grid jacking construction process adopts a jacking system to jack, and the jacking system comprises:

the hydraulic lifting system comprises a lifting bracket, hydraulic lifting jacks, lifting chain connecting rods, hydraulic pump stations and a PLC (programmable logic controller) control master platform, wherein each hydraulic pump station controls two lifting jacks, the PLC master platform controls the opening or closing of an oil way electromagnetic valve through a displacement sensor on each jack, the oil pressure of the way is read through an oil pressure gauge on the pump station, so that the lifting force value of the way is converted, the jacks are arranged on the bottom diagonal intersection points of the lifting bracket, and the jacks are connected with the lifting bracket through lifting cap tops, connecting pull rods and pins;

the structure of the jacking bracket is in a lattice type, the total combined height is determined according to the jacking height, and the standard joints are connected with each other by adopting bolt balls.

Preferably: the jacking operation of the jacking system comprises the following steps:

s1: placing jacking equipment below the installed grid ball nodes, and finding out the center position of the vertex;

s2: installing a jacking bracket support and a hydraulic jack, and fixing a jack base on a jacking bracket frame; the temporary supports arranged on the first floor slab are arranged on the structural concrete beams and cannot be directly contacted with the floor slab; the lower part of the jacking frame adopts a cross support and a cross support which are made of H steel in combination, and a welded steel plate is added at the lower part of the support, so that jacking load is transferred to the concrete beam and the concrete column;

s3: placing the jacking cap on a ball head above the jack piston, sleeving a jacking frame outside, and connecting the upper part of the jacking frame with the grid node ball through a jacking supporting seat;

s4: assembling a supporting frame;

s5: according to the construction condition, an upper chord ball is used as a jacking point in the jacking process, and a bracket is connected with the jacking point ball and then a wire rope is used for connecting a lower chord ball of the net rack with the jacking bracket to form a stable system;

s6: oil return and unloading of the jack, transferring the lifting force of the net rack to the lifting bracket, taking out the steel pin, withdrawing the piston, connecting the ears of the bracket below, and ejecting again; and (5) sequentially circulating to lift the net rack to the positioning height.

Further: s2, fixing the jacking device base on the jacking supporting seat frame through bolts and flange plates by adopting a cross frame made of two H steel combinations as the supporting seat;

in the installation process, a conversion beam is arranged if necessary, a temporary support is welded on the conversion beam, the load bearing support is transferred to the concrete structure beam through the conversion beam, and the conversion beam and the concrete structure beam are fixedly connected by adopting a buried part; when the temporary support is positioned on the first floor layer, a support seat is arranged at the position without a column at the position where the jacking frame is required to be arranged according to the condition of jacking stress.

Further preferred is: in the step S4, the method for assembling the support frame is as follows:

s41: the jacking pull rod is connected with the support frame ear by a steel pin;

s42: pressing an oil supply button on the master control or each pump station, lifting the jack oil cylinder piston, and stopping after the lifting height of the piston is slightly larger than the height of a standard section;

s43: and assembling the next section of support rod piece, and performing the steps until the assembly is completed.

As a preferred embodiment of the present application: s5, arranging 4 cable ropes/layers in every 6m of the jacking frame, wherein one end of each cable rope/layer is connected to the lower chord ball of the net rack in advance; the other end is connected to the jacking frame, and a 2-ton chain block and a 14mm steel wire rope are used; the cable rope is increased for the first time when the cable rope is lifted to 6m, and the cable ropes are sequentially increased according to the height.

Further preferred as the present application is: in the grid lifting construction process, the ground assembly of the grid comprises the following steps:

SA1: grid lines are drawn on the ground, and the first lower chord grid temporary supporting points are positioned. Completing the assembly of the first grid lower chord member on the temporary supporting point;

SA2: assembling a lower chord member of the next cell grid frame;

SA3: assembling an upper chord ball and a net rack web member connected with the upper chord ball into a whole and assembling a lower chord unit in place into a whole structure;

SA4: assembling an upper chord ball, a net rack web member connected with the upper chord ball and an upper chord member on one side into a whole and assembling a lower chord unit arranged in place into a whole structure;

SA5: repeating the construction steps to continue the assembly of other grid members;

SA6: and continuously repeating the assembly of the grid frame members until the assembly of the whole structure is completed.

As still further aspects of the application: in the grid lifting construction process, the steps of high-altitude scattered splicing of the grid are specifically as follows:

SB1: the method comprises the steps that an installer spells balls and rod pieces of a grid structure into cones on the ground according to a grid drawing, units are sequentially arranged according to layers where nodes are located and horizontal distribution positions, and each hoisting unit comprises a ball and 3-4 rod pieces;

SB2: hoisting a1 st cone unit, wherein the 1 st cone unit comprises 1 upper chord ball, 1 upper chord member and 2 web members, hoisting the cone unit to an installation position by using an automobile crane, and assembling the cone unit and a connected grid by workers on a grid frame in a matching way;

SB3: hoisting a2 nd cone unit, wherein the 2 nd cone unit comprises 1 upper chord ball, 2 upper chords and 2 web members, hoisting the 2 nd cone unit to an installation position by using an automobile crane, and assembling the 2 nd cone unit with a connected grid;

SB4: hoisting a3 rd cone unit, wherein the 3 rd cone unit comprises 1 lower chord ball, 1 lower chord member and 2 web members, and hoisting the 3 rd cone unit to an installation position to assemble the 3 rd cone unit with a connected grid;

SB5: hoisting a4 th cone unit, wherein the 4 th cone unit comprises 1 lower chord ball, 2 lower chords and 1 web member, and hoisting the lower chord ball, the 2 lower chords and the 1 web member to a mounting position to assemble grids connected with the lower chord balls;

SB6: hoisting a5 th cone unit, wherein the 5 th cone unit comprises 1 lower chord ball, 2 lower chords and 1 web member, and hoisting the lower chord ball, the 2 lower chords and the 1 web member to a mounting position to assemble grids connected with the lower chord balls;

SB7: repeating the steps, and continuously hoisting the cone units until the whole structure is assembled.

Based on the scheme: in the grid jacking construction process, the electromechanical cooperation installation method comprises the steps of installing a siphon rainwater pipeline and hoisting an air pipe;

the siphon rainwater pipeline installation method comprises the following steps of:

SC1: two pipe fittings to be connected are placed between the clamping devices, and the handles are locked;

SC2: pushing the pipe against the cutting disc, cutting the pipe until the two pipe ends to be connected are all identical, straight and seamless between the pipe ends;

SC3: stabilizing the temperature of the electric welding machine at 210 ℃, and carefully placing the two pipe fittings on a welding plate of the electric welding machine until the protrusion of the welding surface reaches a thickness equal to 1/3 of the wall thickness of the pipe;

SC4: the two pipes are carefully spliced according to the pressure required by welding, and the locking handles are not loosened before the welding part is completely cooled;

SC5: to achieve perfect welding, the welding surfaces of the two pipes need to have the correct cutting angle, and the welding machine must also be maintained at a temperature of 2100 c 50 c.

Preferred on the basis of the foregoing scheme: in the grid jacking construction process, the electromechanical comprehensive pipelines are inserted for construction, and the BIM is utilized to position electromechanical special brackets and pipelines on the grid in advance, so that the installation is accurate, and the electric comprehensive pipelines are synchronously jacked with the assembled grid after being installed;

the air pipe hoisting method comprises the following steps:

SD1: firstly, firmly binding a horizontal air pipe, then hoisting, and slowly tensioning a weight-tying rope during hoisting so that the rope is stressed uniformly and the correct gravity center is maintained;

SD2: stopping hoisting when the air pipe is 200-300 mm away from the ground, and checking the stress point of the hanging chain and the bound twine and rope fastener again;

SD3: continuing to hang to the installation height, placing the air pipe on the supporting and hanging frame, connecting the cross arm, unlocking the rope after confirming that the air pipe is stable, and releasing the rope.

Further preferred on the basis of the foregoing scheme is: in the grid jacking construction process, the wind pipe is installed by utilizing an electromechanical machine while the grid is installed, and the concrete steps are as follows:

SE1: the net rack is assembled from the middle to the south and north sides simultaneously; the net rack is distributed with 4 primary jacking points, the lower part of the jacking rack is supported on the first floor slab, and the upper part of the upper supporting net rack unit is provided with chord welding balls; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and the first stage is lifted up after acceptance inspection;

SE2: the first-stage jacking is carried out to the first floor, the outer expansion assembly is carried out on the east and west sides of the net rack, the jacking points on the east and west sides are simultaneously moved outwards on the two sides, the jacking points are added, the jacking points on the two sides are symmetrically distributed, the lower part of the jacking frame is supported on the first floor, and the upper part of the jacking frame supports the upper chord welding balls of the net rack unit; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and finally the electromechanical pipeline in the area is connected with the pipeline in the primary jacking area, and secondary jacking is performed after acceptance inspection; before the second-stage jacking, the hydraulic jacks at 4 first-stage jacking points in the original competition pool are removed, the jacking frame is not removed, and after the net rack is jacked up at the second stage, the jacking frame is removed after being not stressed;

SE3: the second stage is lifted to the set elevation, the outer expansion assembly is carried out on the two sides of the net rack, and the number and the positions of the lifting points are unchanged; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and finally the electromechanical pipeline in the area is connected with the pipeline in a secondary jacking area, and three-stage jacking is performed after acceptance inspection;

SE4: three-stage jacking is carried out to set elevation, the number and the positions of jacking points on the western side of the net rack are unchanged, the jacking points on the east side horizontally move from a first floor to an east stand, the number of the jacking points is unchanged, and the span of the vertex points is increased; the net rack is outwards expanded and spliced to the east side; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and finally the electromechanical pipeline in the area is connected with the pipeline in a three-stage jacking area, and four stages of jacking are performed after acceptance inspection; before the four-stage jacking, the hydraulic jack of 7 third-stage jacking points on the east side of the original first layer is dismantled, the jacking frame is not dismantled, and after the grid frame is jacked in the four stages, the jacking frame is dismantled after being unstressed;

SE5: the four stages are lifted to the designed elevation, the four sides of the rod pieces are embedded and repaired, and the electromechanical pipeline is connected with the peripheral pipeline;

in the electromechanical matching installation method, the shutter type air supply, return air inlet and diffuser are installed, so that tight and firm connection with an air pipe is ensured, and the shutter type air supply, return air inlet and diffuser are installed on an indoor wall surface or a suspended ceiling; the air port without the suspended ceiling is obviously installed, and the deviation of the installation position and the elevation is not more than 10mm; the tuyere is horizontally arranged, and the deviation of levelness is not more than 3/1000; the tuyere is vertically installed, and the deviation of verticality is not more than 2/1000.

The beneficial effects of the application are as follows:

1. when the jacking bracket is constructed, the jacking and standard knot increasing are completed on the ground, so that the labor intensity of workers is greatly reduced, and the working safety and efficiency are fully improved.

2. According to the application, the net frame ground assembling and net frame high-altitude scattered splicing construction is adopted, so that the lifting operation can be better performed, the net frame high-altitude scattered splicing construction is suitable for different construction environments due to the controllable ground assembling size, the net frame high-altitude scattered splicing construction can be complemented and assembled according to a designed structure, and the workload of the follow-up high-altitude scattered splicing construction is greatly reduced due to the fact that the main part is assembled on the ground.

3. The application adopts the overhead split construction of the net frame, can flexibly adjust the structural size, has high uniformity of construction modes, convenient construction and high structural firmness.

4. When the net rack is installed, the installation of the air pipe and the water pipe is performed by electromechanical synchronous construction, but the installation is not limited to the air pipe and the water pipe, and other various electromechanical project pipelines are also arranged; through the mode, the high-working industry can be effectively reduced, the safety is improved, and meanwhile, the construction quality and progress are ensured.

5. The application has the advantages of safety and quality: the steel net rack jacking and the electromechanical comprehensive pipeline interpenetration operation are synchronously graded jacking, so that a large amount of overhead operation is reduced, the overhead operation is centralized on the ground and the stand, the potential safety hazard is reduced, the construction and the inspection are convenient, and the safety and the quality of the construction are ensured.

6. According to the electromechanical comprehensive pipeline and net rack jacking synchronous construction method, the operation is alternated, so that the working efficiency is improved, the time is saved, and the construction period is shortened; the electromechanical pipeline is installed at high altitude by using the jacking principle, so that the expenditure of mechanical hoisting and the like is reduced, the cost is saved, and the working efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application. In the drawings:

fig. 1 is a schematic diagram of a jack lifting structure when a lifting system works in a grid lifting construction process;

fig. 2 is a schematic diagram of a support frame added during operation of a jacking system in a grid jacking construction process according to the present application;

fig. 3 is a schematic diagram of an oil return structure of a jack when a jacking system works in the grid jacking construction process;

fig. 4 is a schematic structural diagram of a standard section of a lifting bracket in a grid lifting construction process according to the present application;

fig. 5 is a schematic diagram of step SA1 in the grid jacking construction process according to the present application;

fig. 6 is a schematic diagram of step SA2 in the grid jacking construction process according to the present application;

fig. 7 is a schematic diagram of step SA3 in the grid jacking construction process according to the present application;

fig. 8 is a schematic diagram of step SA4 in the grid jacking construction process according to the present application;

fig. 9 is a schematic diagram of step SA5 in the grid jacking construction process according to the present application;

fig. 10 is a schematic diagram of step SA6 in the grid jacking construction process according to the present application;

FIG. 11 is a schematic diagram of SB1 step in a construction process for lifting up a grid frame according to the present application;

FIG. 12 is a schematic diagram of SB2 step in a construction process for lifting up a grid frame according to the present application;

FIG. 13 is a schematic diagram showing the SB3 step in the construction process for lifting up the net rack according to the present application;

FIG. 14 is a schematic diagram showing the SB4 step in the construction process for lifting up the grid frame according to the present application;

FIG. 15 is a schematic view of SB5 step in a construction process for lifting up a grid frame according to the present application;

FIG. 16 is a schematic view showing the SB6 step in the construction process for lifting up the net rack according to the present application;

FIG. 17 is a schematic diagram of SB7 step in a construction process for lifting up a grid frame according to the present application;

fig. 18 is a construction schematic diagram of installation of a pipe in combination with a jacking process in a grid jacking construction process according to the present application;

fig. 19 is a schematic diagram of a SE1 step in a grid jacking construction process according to the present application;

fig. 20 is a schematic diagram of a SE2 step in a grid jacking construction process according to the present application;

fig. 21 is a schematic diagram of step SE3 in a grid jacking construction process according to the present application;

fig. 22 is a schematic diagram of step SE4 in the construction process for lifting up a grid frame according to the present application;

fig. 23 is a schematic diagram of a SE5 step in the grid jacking construction process according to the present application.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

Example 1:

1-17, the grid jacking construction process divides areas before construction, and the area division divides the construction areas into the grid type and the construction environment:

the grid frame of the area I is a regular rectangle;

the grid frame of the II area is an irregular rectangle;

the III area is the III area except the I area and the II area;

jacking point layout is carried out on each region respectively, and in the embodiment:

the first-level jacking of the area I is from-3.6 m elevation to first-layer (0 m) elevation, 4 jacking points are distributed, and the overall weight of a jacking block is about 56t; the second stage of the area I is lifted to 6m elevation, 14 lifting points are distributed, and the whole weight of the lifting block is about 177t; the three-level jacking of the area I is carried out to 15m elevation, 14 jacking points are distributed, and the overall weight of the jacking block is about 250t; the fourth stage of the I area is lifted to the design elevation of 19.8m, 14 lifting points are distributed, and the whole weight of the lifting block is about 320t; the primary jacking of the II area is from-2.6 m elevation to first layer (0 m) elevation, 4 jacking points are distributed, and the overall weight of the jacking block is about 45t; the second stage of the II area is lifted to the designed elevation of 19.8m, 5 lifting points are distributed, and the whole weight of the lifting block is about 68t;

the grid jacking construction process adopts a jacking system to jack, and the jacking system comprises:

the hydraulic lifting system comprises lifting brackets, hydraulic lifting jacks, lifting chain connecting rods, hydraulic pump stations and a PLC (programmable logic controller) control total platform, wherein each hydraulic pump station controls two lifting jacks, the PLC total control platform controls the opening or closing of an oil way electromagnetic valve through a displacement sensor on each jack, the oil pressure of the way is read through an oil pressure gauge on the pump station, so that the lifting force value of the way is converted, the jacks are arranged on the bottom diagonal intersection points of the lifting brackets, the lifting jacks are connected with the lifting brackets through lifting cap tops, connecting pull rods and pins, the design concept of a net rack and a tower crane is comprehensively utilized by the design of the lifting brackets, the height of a jack body is 1.6 m, and the maximum stroke is 1.25 m;

the structure of the jacking bracket is a lattice type, the plane size is 1 meter by 1 meter, and 1.01m is taken as a jacking stroke standard section; the total combined height is determined according to the jacking height, and the standard joints are connected with standard joints by adopting bolt balls.

To perform a reliable jacking operation; the jacking operation of the jacking system comprises the following steps:

s1: placing jacking equipment below the installed grid ball nodes, and finding out the center position of the vertex;

s2: installing a jacking bracket support and a hydraulic jack, and fixing a jack base on a jacking bracket frame; the temporary support arranged on the first floor slab is arranged on the structural concrete beam as much as possible and cannot be directly contacted with the floor slab; the lower part of the jacking frame adopts a cross support and a cross support which are manufactured by combining H steel with the specification of HW150 x 150, and a thick steel plate with the thickness of 20mm is welded on the lower part of the support, so that jacking load is transmitted to the concrete beam and the concrete column;

s3: placing the jacking cap on a ball head above the jack piston, sleeving a jacking frame outside, and connecting the upper part of the jacking frame with the grid node ball through a jacking supporting seat;

s4: assembling a supporting frame;

s5: according to the construction condition, an upper chord ball is used as a jacking point in the jacking process, and after the support is connected with the jacking point ball, a wire rope with the specification of 4 x branstar 14 is used for connecting a net rack lower chord ball with the jacking support, so that a stable system is formed;

s6: oil return and unloading of the jack, transferring the lifting force of the net rack to the lifting bracket, taking out the steel pin, withdrawing the piston, connecting the ears of the bracket below, and ejecting again; and (5) sequentially circulating to lift the net rack to the positioning height.

In order to ensure structural firmness; in the step S2, a bracket seat adopts two cross frames which are 2.2M long and are made of H steel with the specification of HW200 x 200, and a lifter base is fixed on a jacking bracket seat frame through 8M 20 bolts and two flange plates;

in the installation process, a conversion beam is arranged if necessary, a temporary support is welded on the conversion beam, the load bearing support is transferred to the concrete structure beam through the conversion beam, and the conversion beam and the concrete structure beam are fixedly connected by adopting a buried part; when the temporary support is positioned on the first floor layer, a support seat is arranged at the position without a column at the position where the jacking frame is required to be arranged according to the condition of jacking stress.

To facilitate assembly of the support frame; in the step S4, the method for assembling the support frame is as follows:

s41: the jacking pull rod is connected with the support frame ear by a steel pin;

s42: pressing an oil supply button on the master control or each pump station, lifting the jack oil cylinder piston, and stopping after the lifting height of the piston is slightly larger than the height of a standard section;

s43: and assembling the next section of support rod piece, and performing the steps until the assembly is completed.

In order to ensure structural firmness; in the step S5, 4 cable ropes/layers are additionally arranged on each 6m of the jacking frame, and one end of each cable rope/layer is connected to the lower chord ball of the net rack in advance; the other end is connected to the jacking frame, and a 2-ton chain block and a 14mm steel wire rope are used; the cable rope is increased for the first time when the cable rope is lifted to 6m, and the cable ropes are sequentially increased according to the height.

In order to facilitate splicing of the net rack; in the grid frame jacking construction process, the ground assembly of the grid frame comprises the following steps:

SA1: grid lines are drawn on the ground, and the first lower chord grid temporary supporting points are positioned. Completing the assembly of the first grid lower chord member on the temporary supporting point;

SA2: assembling a lower chord member of the next cell grid frame;

SA3: assembling an upper chord ball and a net rack web member connected with the upper chord ball into a whole and assembling a lower chord unit in place into a whole structure;

SA4: assembling an upper chord ball, a net rack web member connected with the upper chord ball and an upper chord member on one side into a whole and assembling a lower chord unit arranged in place into a whole structure;

SA5: repeating the construction steps to continue the assembly of other grid members;

SA6: and continuously repeating the assembly of the grid frame members until the assembly of the whole structure is completed.

In order to facilitate splicing of the net rack; in the grid lifting construction process, the steps of high-altitude scattered splicing of the grid are specifically as follows:

SB1: the method comprises the steps that an installer spells balls and rod pieces of a grid structure into cones on the ground according to a grid drawing, units are sequentially arranged according to layers where nodes are located and horizontal distribution positions, and each hoisting unit comprises a ball and 3-4 rod pieces;

SB2: hoisting a1 st cone unit (comprising 1 upper chord ball, 1 upper chord member and 2 web members), hoisting the cone unit to an installation position by using an automobile crane, and assembling the cone unit and a connected grid by workers on a grid frame in a matching way;

SB3: hoisting the 2 nd cone units (1 upper chord ball, 2 upper chords and 2 web members), hoisting the 2 nd cone units to the installation position by using an automobile crane, and assembling the 2 nd cone units with the connected grids;

SB4: hoisting the 3 rd cone unit (comprising 1 lower chord ball, 1 lower chord and 2 web members), and hoisting to the installation position to assemble the 3 rd cone unit with the connected grid;

SB5: hoisting the 4 th cone unit (comprising 1 lower chord sphere, 2 lower chords and 1 web member), hoisting to a mounting position, and splicing grids connected with the 4 th cone unit;

SB6: hoisting the 5 th cone unit (comprising 1 lower chord sphere, 2 lower chords and 1 web member), hoisting to an installation position, and splicing grids connected with the 5 th cone unit;

SB7: repeating the steps, and continuously hoisting the cone units until the whole structure is assembled.

Example 2:

the following improvements are made on the basis of the embodiment 1: in the grid jacking construction process, the electromechanical cooperation installation method comprises siphon rainwater pipeline installation, air pipe hoisting and the like;

the siphon rainwater pipeline installation method comprises the following steps of:

SC1: placing two pipes to be connected between the clamping devices, ensuring the difference between the tail end of the pipeline and the clamping devices to be about 2cm, and locking the handles;

SC2: pushing the pipe against the cutting disc, cutting the pipe until the two pipe ends to be connected are all identical, straight and seamless between the pipe ends;

SC3: stabilizing the temperature of the electric welding machine at 210 ℃, and carefully placing the two pipe fittings on a welding plate of the electric welding machine until the protrusion of the welding surface reaches a thickness equal to 1/3 of the wall thickness of the pipe;

SC4: the two pipes are carefully spliced according to the pressure required by welding, and the locking handles are not loosened before the welding part is completely cooled;

SC5: to achieve perfect welding, the welding surfaces of the two pipes need to have the correct cutting angle, and the welding machine must also be maintained at a temperature of 2100 c 50 c.

In the grid jacking construction process, the electromechanical comprehensive pipelines are inserted for construction, and the BIM is utilized to position electromechanical special brackets and pipelines on the grid in advance, so that the installation is accurate, and the electric comprehensive pipelines are synchronously jacked with the assembled grid after being installed;

the air pipe hoisting method comprises the following steps:

SD1: firstly, firmly binding a horizontal air pipe, then hoisting, and slowly tensioning a weight-tying rope during hoisting so that the rope is stressed uniformly and the correct gravity center is maintained;

SD2: stopping hoisting when the air pipe is 200-300 mm away from the ground, and checking the stress point of the hanging chain and the bound twine and rope fastener again;

SD3: continuing to hang to the installation height, placing the air pipe on the supporting and hanging frame, connecting the cross arm, unlocking the rope after confirming that the air pipe is stable, and releasing the rope.

In the grid jacking construction process, the wind pipe is installed by utilizing an electromechanical machine while the grid is installed, and the concrete steps are as follows:

SE1: the net rack is assembled from the middle to the south and north sides simultaneously; the net rack is distributed with 4 primary jacking points, the lower part of the jacking rack is supported on the first floor slab, and the upper part of the upper supporting net rack unit is provided with chord welding balls; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and the first stage is lifted up after acceptance inspection;

SE2: the first-stage jacking is carried out to the first floor, the outer expansion assembly is carried out on the east and west sides of the net rack, jacking points on the east and west sides are simultaneously moved outwards to the two sides, the number of the jacking points is increased to 14, 7 jacking points on the west and west sides are symmetrically distributed, the lower part of the jacking rack is supported on the first floor, and the upper part of the upper supporting net rack unit is welded with balls in a string mode; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and finally the electromechanical pipeline in the area is connected with the pipeline in the primary jacking area, and secondary jacking is performed after acceptance inspection; before the second-stage jacking, the hydraulic jacks at 4 first-stage jacking points in the original competition pool are removed, the jacking frame is not removed, and after the net rack is jacked up at the second stage, the jacking frame is removed after being not stressed;

SE3: the secondary jacking is carried out to the elevation of 6m, the outer expansion assembly is carried out on the two sides of the net rack, and the number and the positions of jacking points are unchanged; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and finally the electromechanical pipeline in the area is connected with the pipeline in a secondary jacking area, and three-stage jacking is performed after acceptance inspection;

SE4: three-stage jacking is carried out to 15m elevation, the number and the positions of jacking points on the western side of the net rack are unchanged, the jacking points on the east side are horizontally moved to an east stand from a first floor, the number of the jacking points is unchanged (7), and the span of the vertex points is increased to 40.5m from 31.5 m; the net rack is outwards expanded and spliced to the east side; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and finally the electromechanical pipeline in the area is connected with the pipeline in a three-stage jacking area, and four stages of jacking are performed after acceptance inspection; before the four-stage jacking, the hydraulic jack of 7 third-stage jacking points on the east side of the original first layer is dismantled, the jacking frame is not dismantled, and after the grid frame is jacked in the four stages, the jacking frame is dismantled after being unstressed;

SE5: the four stages are lifted to the designed elevation, the four sides of the rod pieces are embedded and repaired, and the electromechanical pipeline is connected with the peripheral pipeline;

in the electromechanical matching installation method, the shutter type air supply, return air inlet and diffuser are installed, so that tight and firm connection with an air pipe is ensured, and the shutter type air supply, return air inlet and diffuser are installed on an indoor wall surface or a suspended ceiling; the air port without the suspended ceiling is obviously installed, and the deviation of the installation position and the elevation is not more than 10mm; the tuyere is horizontally arranged, and the deviation of levelness is not more than 3/1000; the tuyere is vertically installed, and the deviation of verticality is not more than 2/1000.

In addition, when the net rack is installed, the electromechanical synchronous construction is used for installing the air pipe and the water pipe, but the installation is not limited to the air pipe and the water pipe, and other various electromechanical project pipelines are also arranged; through the mode, the high-working industry can be effectively reduced, the safety is improved, and meanwhile, the construction quality and progress are ensured.

In terms of safety and quality: the steel net rack jacking and the electromechanical comprehensive pipeline interpenetration operation are synchronously graded jacking, so that a large amount of overhead operation is reduced, the overhead operation is centralized on the ground and the stand, the potential safety hazard is reduced, the construction and the inspection are convenient, and the safety and the quality of the construction are ensured.

According to the electromechanical comprehensive pipeline and net rack jacking synchronous construction method, the operation is alternated, so that the working efficiency is improved, the time is saved, and the construction period is shortened; the electromechanical pipeline is installed at high altitude by using the jacking principle, so that the expenditure of mechanical hoisting and the like is reduced, the cost is saved, and the working efficiency is improved.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The grid jacking construction process is characterized in that the grid jacking construction process divides areas before construction, and the area division divides the construction areas into the grid type and the construction environment:

the grid frame of the area I is a regular rectangle;

the grid frame of the II area is an irregular rectangle;

the III area is the III area except the I area and the II area;

respectively carrying out jacking point layout on each region;

the grid jacking construction process adopts a jacking system to jack, and the jacking system comprises:

the hydraulic lifting system comprises a lifting bracket, hydraulic lifting jacks, lifting chain connecting rods, hydraulic pump stations and a PLC (programmable logic controller) control master platform, wherein each hydraulic pump station controls two lifting jacks, the PLC master platform controls the opening or closing of an oil way electromagnetic valve through a displacement sensor on each jack, the oil pressure of the way is read through an oil pressure gauge on the pump station, so that the lifting force value of the way is converted, the jacks are arranged on the bottom diagonal intersection points of the lifting bracket, and the jacks are connected with the lifting bracket through lifting cap tops, connecting pull rods and pins;

the structure of the jacking bracket is in a lattice type, the total combined height is determined according to the jacking height, and the standard joints are connected with each other by adopting bolt balls.

2. The grid jacking construction process according to claim 1, wherein the jacking operation of the jacking system comprises the steps of:

s1: placing jacking equipment below the installed grid ball nodes, and finding out the center position of the vertex;

s2: installing a jacking bracket support and a hydraulic jack, and fixing a jack base on a jacking bracket frame; the temporary supports arranged on the first floor slab are arranged on the structural concrete beams and cannot be directly contacted with the floor slab; the lower part of the jacking frame adopts a cross support and a cross support which are made of H steel in combination, and a welded steel plate is added at the lower part of the support, so that jacking load is transferred to the concrete beam and the concrete column;

s3: placing the jacking cap on a ball head above the jack piston, sleeving a jacking frame outside, and connecting the upper part of the jacking frame with the grid node ball through a jacking supporting seat;

s4: assembling a supporting frame;

s5: according to the construction condition, an upper chord ball is used as a jacking point in the jacking process, and a bracket is connected with the jacking point ball and then a wire rope is used for connecting a lower chord ball of the net rack with the jacking bracket to form a stable system;

s6: oil return and unloading of the jack, transferring the lifting force of the net rack to the lifting bracket, taking out the steel pin, withdrawing the piston, connecting the ears of the bracket below, and ejecting again; and (5) sequentially circulating to lift the net rack to the positioning height.

3. The grid jacking construction process according to claim 2, wherein in the step S2, the bracket seat is a cross made of two H steels in combination, and the lifter base is fixed on the jacking bracket seat through bolts and flanges;

in the installation process, a conversion beam is arranged if necessary, a temporary support is welded on the conversion beam, the load bearing support is transferred to the concrete structure beam through the conversion beam, and the conversion beam and the concrete structure beam are fixedly connected by adopting a buried part; when the temporary support is positioned on the first floor layer, a support seat is arranged at the position without a column at the position where the jacking frame is required to be arranged according to the condition of jacking stress.

4. The grid jacking construction process according to claim 3, wherein in the step S4, the method for assembling the support frame is as follows:

s41: the jacking pull rod is connected with the support frame ear by a steel pin;

s42: pressing an oil supply button on the master control or each pump station, lifting the jack oil cylinder piston, and stopping after the lifting height of the piston is slightly larger than the height of a standard section;

s43: and assembling the next section of support rod piece, and performing the steps until the assembly is completed.

5. The grid jacking construction process according to claim 4, wherein in the step S5, 4 mooring ropes/layer are added to the jacking frame every 6m, and one end of each mooring rope/layer is connected to the grid lower chord ball in advance; the other end is connected to the jacking frame, and a 2-ton chain block and a 14mm steel wire rope are used; the cable rope is increased for the first time when the cable rope is lifted to 6m, and the cable ropes are sequentially increased according to the height.

6. The grid jacking construction process according to claim 5, wherein in the grid jacking construction process, the ground assembly of the grid comprises the following steps:

SA1: drawing grid lines on the ground, positioning a first lower chord grid temporary supporting point, and completing the assembly of the first grid lower chord member on the temporary supporting point;

SA2: assembling a lower chord member of the next cell grid frame;

SA3: assembling an upper chord ball and a net rack web member connected with the upper chord ball into a whole and assembling a lower chord unit in place into a whole structure;

SA4: assembling an upper chord ball, a net rack web member connected with the upper chord ball and an upper chord member on one side into a whole and assembling a lower chord unit arranged in place into a whole structure;

SA5: repeating the construction steps to continue the assembly of other grid members;

SA6: and continuously repeating the assembly of the grid frame members until the assembly of the whole structure is completed.

7. The grid jacking construction process according to claim 6, wherein in the grid jacking construction process, the step of splicing the grid at high altitude comprises the following steps:

SB1: the method comprises the steps that an installer spells balls and rod pieces of a grid structure into cones on the ground according to a grid drawing, units are sequentially arranged according to layers where nodes are located and horizontal distribution positions, and each hoisting unit comprises a ball and 3-4 rod pieces;

SB2: hoisting a1 st cone unit, wherein the 1 st cone unit comprises 1 upper chord ball, 1 upper chord member and 2 web members, hoisting the cone unit to an installation position by using an automobile crane, and assembling the cone unit and a connected grid by workers on a grid frame in a matching way;

SB3: hoisting a2 nd cone unit, wherein the 2 nd cone unit comprises 1 upper chord ball, 2 upper chords and 2 web members, hoisting the 2 nd cone unit to an installation position by using an automobile crane, and assembling the 2 nd cone unit with a connected grid;

SB4: hoisting a3 rd cone unit, wherein the 3 rd cone unit comprises 1 lower chord ball, 1 lower chord member and 2 web members, and hoisting the 3 rd cone unit to an installation position to assemble the 3 rd cone unit with a connected grid;

SB5: hoisting a4 th cone unit, wherein the 4 th cone unit comprises 1 lower chord ball, 2 lower chords and 1 web member, and hoisting the lower chord ball, the 2 lower chords and the 1 web member to a mounting position to assemble grids connected with the lower chord balls;

SB6: hoisting a5 th cone unit, wherein the 5 th cone unit comprises 1 lower chord ball, 2 lower chords and 1 web member, and hoisting the lower chord ball, the 2 lower chords and the 1 web member to a mounting position to assemble grids connected with the lower chord balls;

SB7: repeating the steps, and continuously hoisting the cone units until the whole structure is assembled.

8. The grid jacking construction process according to claim 1, wherein in the grid jacking construction process, an electromechanical cooperation installation method comprises siphon rainwater pipeline installation and air pipe hoisting;

the siphon rainwater pipeline installation method comprises the following steps of:

SC1: two pipe fittings to be connected are placed between the clamping devices, and the handles are locked;

SC2: pushing the pipe against the cutting disc, cutting the pipe until the two pipe ends to be connected are all identical, straight and seamless between the pipe ends;

SC3: stabilizing the temperature of the electric welding machine at 210 ℃, and carefully placing the two pipe fittings on a welding plate of the electric welding machine until the protrusion of the welding surface reaches a thickness equal to 1/3 of the wall thickness of the pipe;

SC4: the two pipes are carefully spliced according to the pressure required by welding, and the locking handles are not loosened before the welding part is completely cooled;

SC5: to achieve perfect welding, the welding surfaces of the two pipes need to have the correct cutting angle, and the welding machine must also be maintained at a temperature of 2100 c 50 c.

9. The grid jacking construction process according to claim 8, wherein in the grid jacking construction process, electromechanical comprehensive pipelines are inserted for construction, electromechanical special supports and pipelines are positioned on the grid in advance by using a BIM model, so that accurate installation is ensured, and after the installation of the standby electric comprehensive pipelines is completed, the standby electric comprehensive pipelines are synchronously jacked with the assembled grid;

the air pipe hoisting method comprises the following steps:

SD1: firstly, firmly binding a horizontal air pipe, then hoisting, and slowly tensioning a weight-tying rope during hoisting so that the rope is stressed uniformly and the correct gravity center is maintained;

SD2: stopping hoisting when the air pipe is 200-300 mm away from the ground, and checking the stress point of the hanging chain and the bound twine and rope fastener again;

SD3: continuing to hang to the installation height, placing the air pipe on the supporting and hanging frame, connecting the cross arm, unlocking the rope after confirming that the air pipe is stable, and releasing the rope.

10. The grid jacking construction process according to claim 9, wherein in the grid jacking construction process, the wind pipe is installed by using an electromechanical machine while the grid is installed, and the concrete steps are as follows:

SE1: the net rack is assembled from the middle to the south and north sides simultaneously; the net rack is distributed with 4 primary jacking points, the lower part of the jacking rack is supported on the first floor slab, and the upper part of the upper supporting net rack unit is provided with chord welding balls; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and the first stage is lifted up after acceptance inspection;

SE2: the first-stage jacking is carried out to the first floor, the outer expansion assembly is carried out on the east and west sides of the net rack, the jacking points on the east and west sides are simultaneously moved outwards on the two sides, the jacking points are added, the jacking points on the two sides are symmetrically distributed, the lower part of the jacking frame is supported on the first floor, and the upper part of the jacking frame supports the upper chord welding balls of the net rack unit; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and finally the electromechanical pipeline in the area is connected with the pipeline in the primary jacking area, and secondary jacking is performed after acceptance inspection; before the second-stage jacking, the hydraulic jacks at 4 first-stage jacking points in the original competition pool are removed, the jacking frame is not removed, and after the net rack is jacked up at the second stage, the jacking frame is removed after being not stressed;

SE3: the second stage is lifted to the set elevation, the outer expansion assembly is carried out on the two sides of the net rack, and the number and the positions of the lifting points are unchanged; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and finally the electromechanical pipeline in the area is connected with the pipeline in a secondary jacking area, and three-stage jacking is performed after acceptance inspection;

SE4: three-stage jacking is carried out to set elevation, the number and the positions of jacking points on the western side of the net rack are unchanged, the jacking points on the east side horizontally move from a first floor to an east stand, the number of the jacking points is unchanged, and the span of the vertex points is increased; the net rack is outwards expanded and spliced to the east side; the electromechanical pipeline in the area is positioned and constructed according to a BIM model, an electromechanical bracket is welded on a lower chord ball, the pipeline is installed on the bracket after the bracket is welded, and finally the electromechanical pipeline in the area is connected with the pipeline in a three-stage jacking area, and four stages of jacking are performed after acceptance inspection; before the four-stage jacking, the hydraulic jack of 7 third-stage jacking points on the east side of the original first layer is dismantled, the jacking frame is not dismantled, and after the grid frame is jacked in the four stages, the jacking frame is dismantled after being unstressed;

SE5: the four stages are lifted to the designed elevation, the four sides of the rod pieces are embedded and repaired, and the electromechanical pipeline is connected with the peripheral pipeline;

in the electromechanical matching installation method, the shutter type air supply, return air inlet and diffuser are installed, so that tight and firm connection with an air pipe is ensured, and the shutter type air supply, return air inlet and diffuser are installed on an indoor wall surface or a suspended ceiling; the air port without the suspended ceiling is obviously installed, and the deviation of the installation position and the elevation is not more than 10mm; the tuyere is horizontally arranged, and the deviation of levelness is not more than 3/1000; the tuyere is vertically installed, and the deviation of verticality is not more than 2/1000.