CN113846607B

CN113846607B - Precise positioning and fixing device for embedded bars in cast-in-situ bottom plate of assembled trench side wall and construction method

Info

Publication number: CN113846607B
Application number: CN202111087767.9A
Authority: CN
Inventors: 雷存伟; 杨秋贵; 朱留杰; 符运友; 甘继胜; 张湛; 冯朝山; 王长生; 杨宏伟; 周彦平; 李良琦; 张保中; 蒋学行; 李伟亭; 白光; 杜新亮; 马文亮; 张光耀; 赵向锋; 李陆明
Original assignee: Henan Keguang Engineering Construction Supervision Co ltd; Henan Modern Construction Technology Co ltd; Second Engineering Bureau Of Henan Water Conservancy; HENAN PROVINCIAL WATER CONSERVANCY RESEARCH INSTITUTE
Current assignee: Henan Keguang Engineering Construction Supervision Co ltd; Henan Modern Construction Technology Co ltd; Second Engineering Bureau Of Henan Water Conservancy; HENAN PROVINCIAL WATER CONSERVANCY RESEARCH INSTITUTE
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2024-04-19
Anticipated expiration: 2041-09-16
Also published as: CN113846607A

Abstract

The invention relates to a precise positioning and fixing device for embedded bars in a cast-in-situ bottom plate of an assembled trench side wall, which comprises a lower layer horizontal positioning and fixing frame, a middle layer horizontal positioning and fixing frame, an upper layer horizontal positioning and fixing checking sleeve plate and a plurality of vertical rods; the lower layer horizontal positioning fixing frame comprises two fixing frame long rods, positioning tooth laths and a plurality of cross rods; the middle layer horizontal positioning fixing frame and the lower layer horizontal positioning fixing frame have the same structure; the vertical rods are arranged between the middle-layer horizontal positioning fixing frame and the lower-layer horizontal positioning fixing frame; the upper layer horizontal positioning fixing checking sleeve plate is correspondingly arranged above the middle layer horizontal positioning fixing frame, and the top end of the vertical rod exceeds the upper layer horizontal positioning fixing checking sleeve plate. The invention also relates to a construction method of the precise positioning and fixing device for the embedded bars in the cast-in-situ bottom plate of the assembled trench side wall. The invention can solve the problems of large positioning deviation, loose binding and unstable fixation of the embedded vertical steel bars of the cast-in-situ bottom plate in the construction process.

Description

Precise positioning and fixing device for embedded bars in cast-in-situ bottom plate of assembled trench side wall and construction method

Technical Field

The invention relates to the technical field of water conservancy and building construction, in particular to a precise positioning and fixing device for embedded bars in a cast-in-situ bottom plate of an assembled type canal side wall and a construction method.

Background

The prior fabricated canal adopts a prefabricated and cast-in-situ mixed fabricated structure and a construction method, reinforced concrete side walls are prefabricated in factories and reinforced concrete of cast-in-situ bottom plates is carried out on construction sites respectively, and then the prefabricated side walls are assembled and installed on the poured concrete bottom plates to assemble the reinforced concrete canal.

The construction of the assembled trench has the structural connection problem of the steel bars between the cast-in-situ bottom plate and the assembled side walls, so that the vertical embedded steel bars which are embedded and connected with the prefabricated side wall components are required to be installed in the cast-in-situ bottom plate. The prefabricated side wall components are also required to be provided with grouting reinforcement sleeves matched with the embedded bars of the bottom plate, so that the section, exposed out of the concrete of the bottom plate of the ditch, of the embedded bars is ensured to be smoothly inserted into the grouting reinforcement sleeves in the prefabricated side wall, and the prefabricated side wall components are effectively in butt joint with the side wall to form the whole of a reinforcement grid, so that the structural integrity of the concrete reinforcement is enhanced.

In the construction of the canal, the installation accuracy requirement of the vertical embedded bars of the bottom plate is very high, and the space position deviation is slightly larger, so that the vertical embedded bars can not be butted with grouting steel bar sleeves in the prefabricated side walls, and the assembly and installation are difficult. The embedded bars are connected with the grouting bar sleeves in a one-to-one correspondence manner, so that the prefabricated side walls can be fixed, and the overall design performance requirement of the side walls is met.

The vertical embedded bars of the cast-in-situ bottom plate are L-shaped corner bars, the embedded bars are arranged in two rows, the bottoms of the embedded bars cannot fall to the ground, the embedded bars can only fall to the layer surface of the lower layer horizontal reinforcing steel bar net at the bottom of the bottom plate, and a plurality of horizontal distributing bars and single-limb stirrups are uniformly distributed on the embedded bars, so that the embedded bars are bound and connected to the upper layer horizontal reinforcing steel bar net of the bottom plate. Conventionally, the upper and lower double-layer horizontal steel bars of the bottom plate are supported by vertical erection ribs, and the method for erecting, supporting and binding connection easily causes unstable overall fixation, large horizontal shaking, unstable binding connection and lower positioning position precision of the vertical embedded steel bars.

When the base plate embedded steel bar is constructed, the traditional steel bar construction method is often applied due to the limitation of poor field construction conditions, the positions of the steel bars are marked on the ground or a template by pens, and the steel bars are connected by binding wires or a small amount of electric welding.

When in construction, once the external force collides and personnel tramples, the steel bars are easy to deform, shift and loose in binding, and the installation quality of the steel bars is easy to be unqualified. In the bottom plate concrete pouring process, the reserved steel bars of the bottom plate can be impacted and collided due to the gravity of the cast-in-place concrete, the impact force of blanking and the vibration impact force of vibration, so that the reserved steel bars are offset, deformed, bound and loosened, and the position accuracy of the steel bars is reduced, and the quality is unqualified.

The utility model discloses an assembled prefabricated wall body embedded bar positioner of authorized bulletin number CN211974080U, needs to carry out the layer by layer location to the embedded bar during its construction, and embedded bar length is longer, causes location operating time long, can't once positioning shaping, and the efficiency of construction is low.

The grouting reinforcement sleeves of the vertical embedded bars of the bottom plate and the prefabricated side walls cannot be well in one-to-one correspondence due to the reasons, the requirement of reinforcement connection cannot be met, even the embedded bars are not added due to the grouting reinforcement sleeves, the unqualified embedded bars are required to be manually adjusted and trimmed one by one, even more, the embedded bars are required to be replenished, the construction workload is increased, the construction period is delayed, the construction cost is increased, the quality cannot be guaranteed, the prefabricated side walls cannot be assembled and installed normally, and great difficulty is brought to construction.

How to control the quality problem of the steel bar connection between the cast-in-situ bottom plate and the assembled side wall, how to control the accurate positioning of the embedded steel bars of the cast-in-situ bottom plate, firmly fix the embedded steel bars, improve the overall stability, how to control the accurate one-to-one positioning precision of the embedded steel bars and the grouting steel bar sleeve, improve the installation quality and the installation speed, save manpower, machinery, time and cost, reduce the working time below the hoisting member, improve the safety of personnel, and improve the quality guarantee, thus being the problem which needs to be solved rapidly at present.

Disclosure of Invention

The invention provides a precise positioning and fixing device for embedded bars in a cast-in-situ bottom plate of an assembled type canal side wall and a construction method, which aim to solve the problems that the existing embedded bars of the cast-in-situ bottom plate are easy to have large positioning deviation, loose binding, unstable fixation and easy deformation in the construction process.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

the precise positioning and fixing device for the embedded bars in the cast-in-situ bottom plate of the assembled trench side wall comprises a lower layer horizontal positioning and fixing frame, a middle layer horizontal positioning and fixing frame, an upper layer horizontal positioning and fixing checking sleeve plate and a plurality of vertical rods;

The lower layer horizontal positioning fixing frame comprises two fixing frame long rods arranged at intervals, positioning tooth battens arranged below each fixing frame long rod and a plurality of cross bars connected with the two fixing frame long rods, a plurality of groups of tooth batten buckles are arranged between each fixing frame long rod and each positioning tooth batten for connection, and a plurality of U-shaped tooth grooves are formed in one side of each positioning tooth batten;

The middle layer horizontal positioning fixing frame and the lower layer horizontal positioning fixing frame have the same structure and are correspondingly arranged above the lower layer horizontal positioning fixing frame, a ground anchor rod is arranged on a fixing frame long rod of the lower layer horizontal positioning fixing frame, the ground anchor rod is inserted into the ground, and a lower layer height adjusting bolt is arranged on a toothed plate strip buckle of the lower layer horizontal positioning fixing frame;

The vertical rods are respectively arranged between the tooth sockets corresponding to the upper and lower layers of the middle layer horizontal positioning fixing frame and the lower layer horizontal positioning fixing frame for connection, and the top ends of the vertical rods extend upwards to exceed the middle layer horizontal positioning fixing frame; the top end of each vertical rod is provided with an upper layer sleeve plate support buckle, an inclined strut is arranged between the two upper layer sleeve plate support buckles positioned at the corners of the middle layer horizontal positioning fixing frame, and the inclined strut is of a scissor supporting structure and is propped against the ground;

The upper layer horizontal positioning fixed check sleeve plate is correspondingly arranged above the middle layer horizontal positioning fixed frame, the upper layer horizontal positioning fixed check sleeve plate is propped against the upper layer sleeve plate supporting buckle, the upper layer horizontal positioning fixed check sleeve plate comprises a middle sleeve plate and side sleeve plates arranged on two sides of the middle sleeve plate, the middle sleeve plate and the side sleeve plates are matched and spliced and sleeved between the vertical rods, and the top ends of the vertical rods exceed the upper layer horizontal positioning fixed check sleeve plate.

Further, the fixed frame long rods and the cross rods are of reinforced structures, the cross rods are welded between the two fixed frame long rods, and the cross rods are vertically distributed with the fixed frame long rods;

The cross bars comprise side cross bars positioned at two ends of the long fixed frame rod and middle cross bars positioned in the middle of the long fixed frame rod, and the cross bars are connected with the long fixed frame rod to form a 'mu' -shaped plane frame structure.

Further, the fixed frame long rod and the tooth grooves are respectively positioned at two sides of the positioning toothed plate strip, and the fixed frame long rod and the positioning toothed plate strip are connected and fastened through the toothed plate strip;

The toothed bar buckle comprises a buckle seat I, a buckle cover I and a locking bolt I, wherein the buckle cover I and the locking bolt I are respectively hinged to two ends of the buckle seat I, the cross section of the buckle seat I is in a shape of Coal seam, the buckle seat I is enclosed between a fixed frame long rod and a positioning toothed bar, a nut is connected to the upper side of the buckle cover I when the locking bolt I is overturned, the nut is tightly abutted to the buckle cover I, and the buckle cover I is tightly abutted to the fixed frame long rod.

Further, a plurality of ground anchors are welded on the fixed frame long rods of the lower horizontal positioning fixed frame; the lower-layer height adjusting bolt comprises a fixed plate connected with the first buckle seat, a lifting adjusting screw rod vertically connected with the fixed plate in a threaded mode and a locking nut arranged on the lifting adjusting screw rod.

Further, the pole setting is the reinforced bar structure, and the pole setting is arranged in between several corresponding tooth's socket wherein, pole setting and middle level horizontal positioning fixed frame and the fixed frame stock welded fastening of lower floor's horizontal positioning fixed frame, and the pole setting bottom surpasses the fixed frame of lower floor's horizontal positioning, and the pole setting is including laying the limit pole setting at the fixed frame corner of lower floor's horizontal positioning and laying the well pole setting in the fixed frame middle part of lower floor's horizontal positioning.

Further, the top ends of the side vertical rods and the middle vertical rods are respectively provided with the upper layer sleeve plate support buckle, and the diagonal brace is arranged between the upper layer sleeve plate support buckles on the two adjacent side vertical rods;

The upper layer sleeve plate support buckle comprises a buckle seat II, a buckle cover II and a locking bolt II, wherein the buckle cover II and the locking bolt II are respectively hinged to two ends of the buckle seat II, a nut is connected to the upper side of the buckle cover II in a turnover mode, the nut is tightly abutted to the buckle cover II, and the buckle cover II is matched with the buckle seat II to clamp the vertical rod.

Further, the upper layer horizontal positioning fixing checking sleeve plate is of a rectangular plane plate frame structure, the middle sleeve plate is arranged between two fixing frame long rods, the middle sleeve plate is hollow, and the two sides of the middle sleeve plate are connected with the side sleeve plates through bolts;

and a plurality of semicircular steel bar perforations are correspondingly formed on the joint surfaces of the middle sleeve plate and the side sleeve plate respectively, the steel bar perforations vertically correspond to the tooth grooves, and the steel bar perforations on the middle sleeve plate and the side sleeve plate are combined to form a round sleeve and are arranged on the vertical rods.

Further, a plurality of silk boards are arranged at the edges of the upper plane and the lower plane of the middle sleeve board, a plurality of pore boards are arranged at the edges of the upper plane and the lower plane of the side sleeve board, the pore boards correspond to the silk boards one by one, and connecting bolts are arranged between the corresponding pore boards and the silk boards;

The edge of the upper plane and the lower plane of the middle sleeve plate is also provided with a plurality of positioning blocks, the edge of the upper plane and the lower plane of the side sleeve plate is also provided with a plurality of positioning clamping plates, the positioning clamping plates are in one-to-one correspondence with the positioning blocks, the positioning clamping plates protrude out of the side sleeve plate and extend upwards in an arc shape, the middle sleeve plate is clamped by the upper positioning clamping plate and the lower positioning clamping plates, and the positioning clamping plates are propped against the positioning blocks.

The construction method of the precise positioning and fixing device for the embedded bars in the cast-in-situ bottom plate of the assembled trench side wall comprises the following steps:

Step 1: firstly, measuring and paying off the length of a bin bottom plate by 10m, wherein 2m is the length of one side wall member, accurately measuring and paying off the positions of the bottom plate embedded bars with the width of each side wall member, and marking the horizontal positions and the elevations of four corners of the bottom plate embedded bars corresponding to each side wall member;

step 2: binding a bottom layer horizontal reinforcement net of the bottom plate of the ditch;

Step 3: placing the precise positioning and fixing device in a gap of a horizontal reinforcing steel bar net at the bottom of the canal bottom plate, and placing the precise positioning and fixing device within the range of 40-60mm above the horizontal reinforcing steel bar net at the bottom of the canal bottom plate;

Step 4: according to the point positions of the paying-off line, the front, back, left and right plane positions of the precise positioning and fixing device are adjusted to enable the paying-off line point positions to correspond to four side vertical rods, and then the elevation of the precise positioning and fixing device is adjusted through a lower layer height adjusting bolt;

the accurate plane position, elevation and verticality of the side upright posts of the four corners are calibrated again through paying-off points;

Step 5: an upper layer sleeve plate support buckle is arranged on the upper part of each upright rod, and the distance between the upper layer sleeve plate support buckle and the top of the upright rod is 60mm;

Ground anchor holes are drilled around the bottom of the precise positioning and fixing device, the precise positioning and fixing device is anchored by adopting ground anchors, then inclined stay bars are firmly welded at the positions 20-30mm below the buckles of the upper sleeve plate brackets on the two adjacent side uprights, and the lower ends of the inclined stay bars are arranged in the precise positioning and fixing device and 20-40mm away from the neutral rods;

step 6: binding an upper layer horizontal reinforcement net of the bottom plate of the ditch;

step 7: the plane position and the verticality of the precise positioning and fixing device are accurately calibrated again through the diagonal brace;

Step 8: the middle sleeve plate on the upper layer is installed, so that the middle sleeve plate is sleeved into the side upright posts and the middle upright posts from the upper side, and the horizontal elevation of the middle sleeve plate is adjusted through the clamping buckle of the upper sleeve plate support;

Mounting upright posts in the spare tooth grooves, wherein the upright posts are used as embedded bars, straightening two-by-two ropes along the long side direction of the precise positioning and fixing device respectively at four sides to serve as the top height standard of the embedded bars, penetrating the upper parts of the upright posts into semicircular steel bar perforation holes of a middle sleeve plate, propping the top ends of the upright posts against the ropes, and simultaneously placing the lower parts of the upright posts into the corresponding two tooth grooves, and fixing the upright posts firmly by electric welding or binding; the edge sleeve plate and the middle sleeve plate are combined, connected and locked;

Step 9: checking the plane position, the elevation and the verticality and the installation firmness of the embedded bars, welding all the upright posts with the long rods of the fixed frame firmly after the upright posts are qualified, and cutting off redundant upright posts higher than the designed height;

step 10: removing the middle and lower layer positioning toothed plate strips, firstly removing toothed plate strip buckles on the middle layer horizontal positioning fixing frame, and then separating and taking out the corresponding positioning toothed plate strips from the fixing frame long rods;

Then dismantling the toothed plate strip buckle, the positioning toothed plate strip and the lower-layer height adjusting bolt on the lower-layer horizontal positioning fixing frame, and taking out all the toothed plate strip buckle, the positioning toothed plate strip and the lower-layer height adjusting bolt, thus completing the construction of the precise positioning fixing device corresponding to one side wall component;

Step 11: repeating the steps 2-10 to finish the construction of the precise positioning and fixing devices corresponding to the other four side wall components, and pulling a 10m through rope between the 5 precise positioning and fixing devices to perform position determination and precise verification; then, the final precision positioning and fixing device and the installation precision and firmness of the vertical rod are checked;

step 12: erecting a peripheral template for installing a channel bottom plate after the inspection is qualified, and then pouring concrete; after the concrete pouring is completed and solidified for 1-2 days, the upper layer horizontal positioning fixing check plate frame and the upper layer sleeve plate support buckle are removed, and the protection of the exposed part of the embedded bar is finished, namely the construction of the embedded bar of the 10m long base plate is completed.

Through the technical scheme, the invention has the beneficial effects that:

The invention has reasonable structural design, can effectively play roles of precise positioning, precise installation and firm fixation on the embedded bars, and can ensure that the positions of grouting bar sleeves in the embedded bars of the bottom plate and the prefabricated side walls are aligned one by one accurately. The invention provides a firm supporting frame for the embedded bars, and overcomes the defects that the integral fixation of the vertical embedded bars is unstable, the horizontal shaking is large, the binding connection is unstable and the positioning position precision is low because the traditional embedded bars are supported by the upper layer of horizontal steel bar meshes and the lower layer of horizontal steel bar meshes of the bottom plate.

According to the middle-layer horizontal positioning fixing frame and the lower-layer horizontal positioning fixing frame, the side vertical rods and the middle vertical rods are made of steel bars, the side vertical rods and the middle vertical rods can directly replace embedded steel bars, the middle-layer horizontal positioning fixing frame and the fixed-frame long rods in the lower-layer horizontal positioning fixing frame can directly replace horizontally distributed steel bars, and the side cross bars and the middle cross bars can directly replace single stirrups, so that a large amount of steel bar materials for binding a bottom plate steel bar net can be saved.

The invention has high requirements on rigidity and dimensional accuracy during manufacturing, the tooth grooves can be accurately positioned and firmly welded to fix the embedded bars, and the problems of inaccurate manual lofting and line drawing, large deviation of placement positions and easy loosening of binding of the embedded bars are solved. The combined upper layer positioning and fixing checking sleeve plate is a part for positioning, fixing and checking the horizontal position and the height of the exposed part of embedded bars extending out of the bottom plate concrete, can solve the problems of accurate positioning and firm fixing of the exposed bars, dislocation and deformation of the exposed bars caused by the action of construction external force when the bottom plate concrete is poured, and improves the quality and the accuracy of embedded bars. The upper layer horizontal positioning fixing checking sleeve plate can be taken out for repeated use, is convenient to assemble and disassemble and saves materials.

The precise positioning and fixing device is connected with the ground through the ground anchor rod, so that the precise positioning and fixing device and the embedded bars are integrally and firmly fixed on the ground, all the vertical embedded bars are connected to form a whole, the precise positioning and fixing device has strong external force impact resistance, the embedded bars are not deformed, misplaced, offset and bound and loosened due to the influence of construction external forces such as collision, personnel trampling, concrete self-gravity, blanking and impact force of vibration, and the quality and precision of embedded bars are greatly improved.

The upper layer horizontal positioning fixing checking sleeve plate, the positioning toothed plate strip, the toothed plate strip buckle, the upper layer sleeve plate support buckle and the lower layer height adjusting bolt are all manufactured by adopting a detachable method, so that the upper layer horizontal positioning fixing checking sleeve plate, the positioning toothed plate strip, the toothed plate strip buckle and the lower layer height adjusting bolt can be repeatedly utilized, the materials are saved, and the cost is reduced. The invention greatly improves the position, length and elevation precision of the embedded bars, greatly improves the overall stability and firmness of the embedded bars, meets the requirements of quality and precision, reduces the time for aligning the embedded bars with the grouting bar sleeve when assembling the side wall for installation, greatly improves the installation speed, saves a great amount of manpower, material resources, machinery, time and cost, accelerates the construction progress and greatly improves the quality guarantee. When the side wall is hoisted and assembled, the working time under the component is reduced, and the safety of constructors is greatly improved.

Drawings

FIG. 1 is a schematic view of the construction completion of the precise positioning and fixing device for embedded bars in the cast-in-situ bottom plate of the assembled trench side wall.

FIG. 2 is a schematic diagram showing the assembly of a lower horizontal positioning and fixing frame and a middle horizontal positioning and fixing frame of a precision positioning and fixing device for embedded bars in a cast-in-situ bottom plate of an assembled trench side wall.

FIG. 3 is a schematic view of the installation of diagonal braces of the precise positioning and fixing device for embedded bars in the cast-in-situ bottom plate of the fabricated trench sidewall of the present invention.

Fig. 4 is a schematic view of a middle layer horizontal positioning fixing frame of the precise positioning fixing device for embedded bars in a cast-in-situ bottom plate of an assembled trench side wall.

Fig. 5 is a schematic diagram showing the disassembly of a middle horizontal positioning fixing frame of the precise positioning fixing device for embedded bars in the cast-in-situ bottom plate of the assembled trench side wall.

Fig. 6 is a schematic diagram showing the assembly of toothed bar buckles and lower layer height adjusting bolts of the precise positioning and fixing device for embedded bars in the cast-in-situ bottom plate of the assembled trench side wall.

FIG. 7 is a schematic view of the upper deck plate retainer buckle of the precision positioning and fixing device for embedded bars in the cast-in-place bottom plate of the assembled trench side wall.

FIG. 8 is a schematic view of an upper layer horizontal positioning and fixing verification sleeve plate of a precision positioning and fixing device for embedded bars in a cast-in-situ bottom plate of an assembled trench side wall.

FIG. 9 is a side view of an upper layer horizontal positioning and fixing verification sleeve plate of a precision positioning and fixing device for embedded bars in a cast-in-situ bottom plate of an assembled trench side wall.

FIG. 10 is a schematic drawing showing the disassembly of the upper layer horizontal positioning and fixing verification sleeve plate of the precise positioning and fixing device for embedded bars in the cast-in-situ bottom plate of the assembled trench side wall.

The reference numerals in the drawings are: the vertical rod is 1, the fixed frame long rod is 2, the positioning toothed bar is 3, the cross rod is 4, the toothed bar is 5, the buckle seat is 51, the buckle cover is 52, the locking bolt is 53, the tooth socket is 6, the ground anchor rod is 7, the upper layer sleeve plate support buckle is 8, the buckle seat is 81, the buckle cover is 82, the locking bolt is 83, the inclined strut is 9, the middle sleeve plate is 10, the side sleeve plate is 11, the lower layer height adjusting bolt is 12, the fixed plate is 121, the lifting adjusting screw is 122, the locking nut is 123, the reinforcing steel bar is perforated, the wire plate is 14, the hole plate is 15, the connecting bolt is 16, the positioning block is 17, the positioning clamping plate is 18, and the middle clamping plate is 19.

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings:

As shown in fig. 1-10, the precise positioning and fixing device for embedded bars in the cast-in-situ bottom plate of the assembled trench side wall comprises a lower layer horizontal positioning and fixing frame, a middle layer horizontal positioning and fixing frame, an upper layer horizontal positioning and fixing checking sleeve plate and eight vertical rods 1 which are correspondingly arranged from bottom to top in sequence. The vertical rod 1 is used for sequentially connecting a lower layer horizontal positioning fixing frame, a middle layer horizontal positioning fixing frame and an upper layer horizontal positioning fixing checking sleeve plate, and a rectangular solid frame structure device is formed after connection.

The precise positioning and fixing device is a rectangular three-dimensional frame structure positioning and fixing device arranged in the cast-in-situ bottom plate along the length direction of the side wall of the canal and at the designed embedded bar position, is used for installing, positioning and fixing the embedded bar in the cast-in-situ bottom plate, plays a role in precisely positioning and firmly fixing the vertical embedded bar embedded in the cast-in-situ bottom plate, and bears and transmits the gravity of the embedded bar. The embedded bars in the cast-in-situ bottom plate are the vertical bars 1 in the embodiment, and the vertical bars 1 play a role of the embedded bars.

In this embodiment, the lower layer horizontal positioning fixing frame is a rectangular planar frame structure, and the lower layer horizontal positioning fixing frame includes two fixing frame long rods 2 arranged at intervals, a positioning toothed slat 3 arranged below each fixing frame long rod 2, and six cross rods 4 connected with the two fixing frame long rods 2. The long rod 2 of the fixed frame and the positioning toothed plate strip 3 below the long rod form the long side of the lower horizontal positioning fixed frame, and the cross rod 4 forms the short side of the lower horizontal positioning fixed frame.

The six cross bars 4 comprise two side cross bars positioned at two ends of the fixed frame long bar 2 and four middle cross bars positioned in the middle of the fixed frame long bar 2. Every be provided with multiunit pinion rack buckle 5 between fixed frame stock 2 and the location pinion rack 3, pinion rack buckle 5 is used for connecting, passes through between fixed frame stock 2 and the location pinion rack 3 pinion rack buckle 5 connects the fastening, and location pinion rack 3 one side all is equipped with 10U-shaped tooth's socket 6.

When the lower layer horizontal positioning fixing frame is manufactured, the fixing frame long rod 2 and the cross rod 4 are of steel bar structures, namely, are manufactured by using steel bars; firstly, two fixed frame long rods 2 are placed left and right at a certain interval, and a cross rod 4 is welded between the two fixed frame long rods 2.

Specifically, each of two end parts of the fixed frame long rod 2 is provided with a side cross rod, each of two end parts of the fixed frame long rod 2 is internally provided with a middle cross rod at 42cm intervals, six welded cross rods 4 are perpendicular to the fixed frame long rod 2, and the cross rods 4 are connected with the fixed frame long rod 2 to form a 'mesh' -shaped plane frame structure.

The fixed frame long rod 2 is made of screw-thread steel bars with the diameter of more than 22mm, the length of the fixed frame long rod is 1944mm, the side cross rods and the middle cross rods are made of screw-thread steel bars with the diameter of more than 22mm, and the length of the side cross rods and the middle cross rods is 412mm. When the diameter of the construction drawing design steel bar of the lower-layer horizontal positioning fixing frame is smaller than phi 22mm, the diameter of the field should be increased to phi 22mm so as to meet the strength and rigidity requirements of the lower-layer horizontal positioning fixing frame.

The positioning toothed bar 3 is made of steel bars with the width of 43mm and the thickness of 7mm, each positioning toothed bar 3 is 1944mm long, the length of each positioning toothed bar is identical to that of the fixed frame long bar 2, 10 tooth grooves 6 are uniformly distributed on the positioning toothed bar 3, the tooth grooves 6 are clamping grooves for placing the vertical bars 1, the vertical bars 1 can be precisely positioned and firmly connected and fixed, and the fixed frame long bar 2 and the tooth grooves 6 are respectively positioned on two sides of the positioning toothed bar 3.

The tooth groove 6 has a groove width of 23mm, namely, the diameter of the vertical rod 1 is 22mm+1mm, and the tooth groove 6 is 23mm deep. The center line of the tooth grooves 6 at the two ends of the positioning tooth strip 3 is 72+/-1 mm away from the end part of the positioning tooth strip 3, the center line distance between two adjacent tooth grooves 6 in the middle of the positioning tooth strip 3 is 200+/-1 mm, the center line distance between the corresponding tooth grooves 6 in the left positioning tooth strip 3 and the right positioning tooth strip 3 is 478+/-1 mm, and the position deviation of all the tooth grooves 6 is +/-1 mm.

The positioning toothed bar 3 is tightly attached to the lower part of the fixed frame long rod 2 when being placed, and the positioning toothed bar 3 and the fixed frame long rod 2 are clamped by adopting a toothed bar buckle 5 so as to form a whole. A fixed frame long rod 2 is arranged on each positioning toothed bar 3, and is connected and locked by 4-5 toothed bar buckles 5.

The toothed plate strip buckle 5 is a steel fastening device capable of being opened and closed, the toothed plate strip buckle 5 comprises a buckle seat I51, a buckle cover I52 and a locking bolt I53, wherein the buckle cover I52 and the locking bolt I53 are respectively hinged to two ends of the buckle seat I51, the cross section of the buckle seat I51 is in a 'Coal seam' shape, the buckle seat I51 is enclosed between a fixed frame long rod 2 and a positioning toothed plate strip 3, the locking bolt I53 is overturned to the upper side of the buckle cover I52 and is connected with a nut, the nut is tightly abutted to the buckle cover I52, and the buckle cover I52 is tightly abutted to the fixed frame long rod 2. After the rack bar buckle 5 is installed, the fixed frame long rod 2 and the positioning rack bar 3 can be wrapped in the section direction, and the connection purpose is achieved by screwing the nut locking buckle cover one 52.

In this embodiment, the middle layer horizontal positioning fixing frame and the lower layer horizontal positioning fixing frame have the same structure and are correspondingly arranged above the lower layer horizontal positioning fixing frame. Specifically, the middle layer horizontal positioning fixing frame and the lower layer horizontal positioning fixing frame are of the same structure and size, the length 1944mm and the width 500mm of the middle layer horizontal positioning fixing frame and the lower layer horizontal positioning fixing frame are different in installation positions.

The middle layer horizontal positioning fixing frame and the lower layer horizontal positioning fixing frame are both used as fixing support frames for reinforcing steel bars, one is installed in the middle of the precise positioning fixing device, and the other is installed in the lower layer horizontal positioning fixing frame at the lower part of the precise positioning fixing device.

The manufacturing mode of the middle-layer horizontal positioning fixing frame is the same as that of the lower-layer horizontal positioning fixing frame, and the manufacturing mode is not repeated here, so that the whole middle-layer horizontal positioning fixing frame and the whole lower-layer horizontal positioning fixing frame are ensured to be flat and have no distortion after the manufacturing is finished.

In this embodiment, the toothed plate strip buckle 5 of the lower layer horizontal positioning fixing frame is provided with a lower layer height adjusting bolt 12, and the lower layer height adjusting bolt 12 is a height adjusting and supporting force transmission component in the precise positioning fixing device and is installed and fixed on the lower layer horizontal positioning fixing frame through the toothed plate strip buckle 5.

The lower-layer height adjusting bolt 12 comprises a fixing plate 121 connected to the first buckle seat 51, a lifting adjusting screw 122 vertically screwed on the fixing plate 121, and a locking nut 123 arranged on the lifting adjusting screw 122. The fixing plate 121 is welded and fixed on the first fastening seat 51, the fixing plate 121 is a rectangular steel plate, and a 20mm screw hole is formed in the rectangular steel plate and matched with the lifting adjusting screw 122. The lifting adjusting screw 122 is a screw with a through wire with a hexagonal fixing nut at the top end, and the lifting adjusting screw 122 has a diameter of 20mm and a length of 250mm.

The lower layer height adjusting bolt 12 is used for adjusting the overall height, verticality and levelness of the precise positioning and fixing device through lifting and lowering of the lifting adjusting screw 122 so as to meet the technical quality precision requirement. The lower layer height adjusting bolt 12 also plays a role in supporting and transmitting the weight transmitted by the precision positioning and fixing device and the embedded bars.

The toothed plate strip buckle 5 on the middle layer horizontal positioning fixing frame is used independently. The toothed plate strip buckle 5 on the lower layer horizontal positioning fixing frame is matched with the lower layer height adjusting bolt 12. When the lower layer height adjusting bolt 12 is installed, the lower layer height adjusting bolt can be installed at any end of the first buckle seat 51, and the normal use of the toothed plate strip buckle 5 is not affected.

In this embodiment, the ground anchor rod 7 is disposed on the fixed frame long rod 2 of the lower horizontal positioning fixed frame, and the ground anchor rod 7 is inserted into the ground. Specifically, a plurality of ground anchors 7 are welded on the fixed frame long rod 2 of the lower horizontal positioning fixed frame.

The ground anchor rod 7 is an anchoring tool made of steel bars and is also an important component for supporting force transmission, and the ground anchor rod 7 has the main effects of firmly fixing the ground anchor rod 7 after the position of the precise positioning and fixing device is adjusted, so that the stability of the ground anchor rod is greatly improved, the precise positioning and fixing device is prevented from being deviated under the action of construction external force, the position precision of the vertical embedded bars of the bottom plate is ensured, and meanwhile, the precise positioning and fixing device and the whole weight and the construction external force of the embedded bars are supported.

The ground anchor rods 7 are inserted around the outer side of the fixed frame long rod 2 of the lower layer horizontal positioning fixed frame, and 4-6 ground anchor rods are respectively inserted at two sides. One end of the ground anchor rod 7 is inserted into the underground concrete cushion, and the other end exposed out of the ground is welded and connected with the fixed frame long rod 2, so that the ground anchor rod is formed into a firm whole. The ground anchor rod 7 is made of steel bars with the diameter of 20-25mm, the length of 250-300mm and the anchoring depth of 100-130mm.

In this embodiment, the vertical rods 1 are respectively disposed between the tooth sockets 6 corresponding to the middle-layer horizontal positioning fixing frame and the lower-layer horizontal positioning fixing frame, so as to be connected, the vertical rods 1 are welded around the middle-layer horizontal positioning fixing frame and the lower-layer horizontal positioning fixing frame to form a three-dimensional frame structure, and the vertical rods 1 are used for transmitting force and supporting.

The vertical rods 1 are arranged between eight corresponding tooth grooves 6 corresponding to the middle-layer horizontal positioning fixing frame and the lower-layer horizontal positioning fixing frame, the eight vertical rods 1 correspond to the eight tooth grooves 6, and the vertical rods 1 are also arranged in the rest 12 tooth grooves 6 when the subsequent construction is performed, so that the total number of the vertical rods 1 is 20. The pole setting 1 is welded fixedly with the fixed frame long rod 2 of the middle layer horizontal positioning fixed frame and the fixed frame of the lower layer horizontal positioning fixed frame, the number of the pole setting 1 on one fixed frame long rod 2 is four, four is one row, and in the embodiment, two rows of eight pole settings 1 are shared, namely, two rows of embedded bars are arranged.

The top end of the vertical rod 1 extends upwards to exceed the middle-layer horizontal positioning fixing frame, and the bottom end of the vertical rod 1 extends to exceed the lower-layer horizontal positioning fixing frame. The upright 1 comprises four edge uprights arranged at corners of the lower horizontal positioning fixing frame and four middle uprights arranged in the middle of the lower horizontal positioning fixing frame.

The side vertical rods and the middle vertical rods are 800mm long and are made of steel bars with diameters of 22mm, and the side vertical rods and the middle vertical rods can be directly used for replacing embedded steel bars. Four limit pole setting welded fastening is in the fixed frame long rod 2's of middle level horizontal positioning fixed frame and lower floor horizontal positioning fixed frame both ends position, and four neutral bars are installed respectively welded in the fixed frame long rod 2's of middle level horizontal positioning fixed frame and lower floor horizontal positioning fixed frame middle part both sides ⅓ and ⅔'s position department.

Each upright 1 top is provided with an upper layer sleeve plate support buckle 8, namely the side upright and the middle upright top are both provided with the upper layer sleeve plate support buckle 8, and the upper layer sleeve plate support buckle 8 is a fastening device made of steel and capable of opening and closing and is used for supporting an upper layer horizontal positioning and fixing verification sleeve plate.

The upper layer sleeve plate holds in palm buckle 8 includes buckle seat two 81 and articulates buckle lid two 82 and lock bolt two 83 at buckle seat two 81 both ends respectively, lock bolt two 83 upset is connected with the nut to buckle lid two 82 tops, the nut is tight to support on buckle lid two 82, buckle lid two 82 cooperation buckle seat two 81 parcel centre gripping pole setting 1, buckle lid two 82 and buckle seat two 81 middle parts are the indent arc, can good adaptation pole setting 1.

An inclined stay bar 9 is arranged between two upper layer sleeve plate support buckles 8 positioned at the corners of the middle layer horizontal positioning fixing frame, namely, the inclined stay bar 9 is arranged between the upper layer sleeve plate support buckles 8 on two adjacent side vertical rods, the inclined stay bar 9 is of a scissor stay structure, and the inclined stay bar 9 is propped against the ground.

The inclined stay bar 9 is made of steel bars with diameters of 20-28 mm, the top end of the inclined stay bar 9 is arranged below the upper layer sleeve plate support buckle 8 on the side vertical rod, and the bottom end of the inclined stay bar 9 is arranged on the precise positioning fixing device and connected with the ground. The triangle stable structure is formed after the diagonal brace 9 is installed, so that the accuracy and stability of the accurate positioning fixing device and the upper part of the vertical rod 1 can be effectively guaranteed, and the precision of construction requirements can be effectively guaranteed.

In this embodiment, the upper layer horizontal positioning fixing calibration sleeve plate is correspondingly arranged above the middle layer horizontal positioning fixing frame, and the upper layer horizontal positioning fixing calibration sleeve plate is propped against the upper layer sleeve plate support buckle 8 and is supported by the upper layer sleeve plate support buckle 8.

The upper layer horizontal positioning fixing checking sleeve plate is of a rectangular plane plate frame structure, the upper layer horizontal positioning fixing checking sleeve plate is 1944mm long, 678mm wide, and the plate thickness is determined according to materials, and the upper layer horizontal positioning fixing checking sleeve plate mainly has the functions of accurately positioning, firmly fixing, checking the horizontal position and the top elevation position of the upper portion of the vertical embedded steel bar, and is a rectangular combined plane plate frame convenient to install and detach.

The upper layer horizontal positioning and fixing checking sleeve plate comprises a middle sleeve plate 10 and side sleeve plates 11 symmetrically distributed on two sides of the middle sleeve plate 10, namely, the central line of each row of upright rods 1 divides the upper layer horizontal positioning and fixing checking sleeve plate into three plates, two of the two sides are the side sleeve plates 11, and the middle plate is the middle sleeve plate 10. The parting joint of the middle sleeve plate 10 and the side sleeve plate 11 is also the position of the central line of the vertical rod 1, the middle sleeve plate 10 and the side sleeve plate 11 are matched and spliced between the vertical rods 1, and the top end of the vertical rod 1 exceeds the upper layer horizontal positioning and fixing check sleeve plate.

Specifically, the middle sleeve plate 10 is arranged between the two fixed frame long rods 2, the length of the middle sleeve plate 10 is 1944mm, the width of the middle sleeve plate 10 is 478mm, the thickness of the middle sleeve plate is determined by materials, the middle sleeve plate is integrally manufactured by a steel plate with the thickness of 4-8mm or a high-strength wear-resistant plastic plate with the thickness of 15-20mm, and the whole plate frame can also be manufactured by an assembling welding method. The middle sleeve plate 10 is hollow-out plate-shaped, so that the weight of the middle sleeve plate is reduced, and in the embodiment, the hollow-out is square, and the hollow-out size is 480 mm 340mm.

10 Semicircular steel bar perforations 13 are correspondingly formed on the joint surfaces of the middle sleeve plate 10 and the edge sleeve plate 11 respectively, namely, the steel bar perforations 13 are correspondingly arranged on the long edge of the middle sleeve plate 10 and the long edge of the edge sleeve plate 11, and the steel bar perforations 13 are in one-to-one correspondence with the tooth grooves 6. The middle sleeve plate 10 and the edge sleeve plate 11 are matched for use, the steel bar perforations 13 on the middle sleeve plate 10 and the edge sleeve plate 11 are combined to form a round sleeve on the upright rod 1, the length of the edge sleeve plate 11 is 1944mm, the width is 100mm, and the thickness is the same as that of the middle sleeve plate 10.

In order to realize the installation of the middle sleeve plate 10 and the side sleeve plate 11, the side sleeve plate 11 is connected to the two sides of the middle sleeve plate 10 through bolts. Specifically, a plurality of screw plates 14 are arranged at the edges of the upper and lower planes of the middle sleeve plate 10, a plurality of hole plates 15 are arranged at the edges of the upper and lower planes of the side sleeve plate 11, the hole plates 15 and the screw plates 14 are in one-to-one correspondence, and connecting bolts 16 are arranged between the corresponding hole plates 15 and the screw plates 14.

The pore plate 15 and the silk plate 14 are made of steel, are rectangular, have the same size, are 70mm in height, 60mm in width and 16-20mm in thickness, and have the diameters of 18-20 mm of the connecting bolts 16. The middle sleeve plate 10 and the side sleeve plate 11 are tightly combined by passing through the orifice plate 15 through the connecting bolts 16 to be matched with the silk plate 14, so that the two plates cannot move and are firmly connected to form a whole.

In order to facilitate the installation of the middle sleeve plate 10 and the side sleeve plate 11, a plurality of positioning blocks 17 are further arranged at the edges of the upper plane and the lower plane of the middle sleeve plate 10, the number of the positioning blocks 17 is four, two groups of positioning blocks are symmetrically arranged at two ends of the upper plane and the lower plane of the middle sleeve plate 10, and the opposite surfaces of the two positioning blocks 17 in one group are inclined planes. The positioning block 17 is a quadrangular straight plate with one side being a bevel edge, the length of the square plate is 40mm, the thickness of the square plate is 20mm, and the square plate is welded and fixed at the vicinity of four corners of the middle sleeve plate 10.

The edges of the upper plane and the lower plane of each edge sleeve plate 11 are also provided with a plurality of positioning clamping plates 18, the number of the positioning clamping plates 18 is four, two groups of positioning clamping plates are respectively and correspondingly arranged at the two ends of the upper plane and the lower plane of the edge sleeve plate 11, and the positioning clamping plates 18 extend out of the edge sleeve plate 11, protrude out of the edge sleeve plate 11 and extend upwards in an arc shape. The locating clamping plate 18 is a quadrangle with one side being a bevel edge, the length of the quadrangle is 100mm, the thickness of the quadrangle is 10mm, one end of the locating clamping plate 18 is in a straight plate shape, the other end of the quadrangle is in a sled shape, one section of the straight plate shape is welded on the edge sleeve plate 11, and one section of the sled shape is an outer extending section and is used for being inserted into the middle sleeve plate 10 and combined with the fixed locating block 17 to form locating.

The positioning clamping plates 18 are in one-to-one correspondence with the positioning blocks 17, the middle sleeve plate 10 is clamped by the upper positioning clamping plate 18 and the lower positioning clamping plate 18, the positioning clamping plates 18 are abutted against the positioning blocks 17, and then lateral positioning is formed on the positioning clamping plates 18. After the locating clamp plate 18 and the locating block 17 are matched and installed, the side walls of the locating clamp plate 18 are contacted and matched with the inclined sides of the locating block 17 to locate the edge sleeve plate 11 and the middle sleeve plate 10, and meanwhile, the locating clamp plate 18 on the upper plane and the locating clamp plate 18 on the lower plane clamp the middle sleeve plate 10 so that the middle sleeve plate 10 cannot move up and down.

The positioning block 17 and the positioning clamping plate 18 form a longitudinal positioning unit, when the edge sleeve plate 11 and the middle sleeve plate 10 are assembled and butted, the semicircular embedded bar perforation 13 of the edge sleeve plate 11 and the middle sleeve plate 10 can be ensured to be accurately matched to form a right circular hole, the penetration of the vertical rod 1 is facilitated, and the positioning verification precision is improved.

In order to optimize the product structure, the edges of the upper and lower planes in the middle of the edge sleeve plate 11 are respectively provided with a middle clamping plate 19, and the middle clamping plate 19 is rectangular, has the length of 100mm, the width of 70mm, the thickness of 10mm and the size of being larger than the positioning clamping plate 18. One end of the middle clamping plate 19 is in a straight plate shape and is welded on the edge sleeve plate 11, and the other end of the middle clamping plate 19 is in a sled shape and extends out of the edge sleeve plate 11. After the edge sleeve plate 11 and the middle sleeve plate 10 are assembled, the middle clamping plate 19 is matched with and clamps the middle sleeve plate 10 to form the tight connection between the upper edge sleeve plate 11 and the upper middle sleeve plate 10, so that the two plates cannot move up and down, and the integrity of the upper horizontal positioning and fixing verification sleeve plate is improved.

When the upper layer horizontal positioning fixed check sleeve plate is manufactured, steel or high-strength plastic plates can be adopted for manufacturing: 1. when the steel is used for manufacturing, the edge sleeve plate 11 and the middle sleeve plate 10 are made of steel plates with the thickness of 4-8 mm, and the thicknesses of the steel used for the positioning block 17, the positioning clamping plate 18, the middle clamping plate 19, the pore plate 15 and the silk plate 14 are the same as the thickness of the edge sleeve plate 11. The fixed connection of the positioning block 17, the positioning clamping plate 18, the middle clamping plate 19, the pore plate 15 and the silk plate 14 with the edge sleeve plate 11 and the middle sleeve plate 10 can be welded or bonded by high-strength resin adhesive, and the bonding fixation should be firm and reliable.

2. When the high-strength plastic plates are used for manufacturing, the plates with the thickness of 15-20 mm are selected as the edge sleeve plate 11 and the middle sleeve plate 10, and the thicknesses of the high-strength plastic plates used as the positioning block 17, the positioning clamping plate 18, the middle clamping plate 19, the pore plate 15 and the silk plate 14 are increased by 1.5-2 times relative to the thickness of the edge sleeve plate 11. The fixed connection of the positioning block 17, the positioning clamping plate 18, the middle clamping plate 19, the pore plate 15 and the silk plate 14 with the edge sleeve plate 11 and the middle sleeve plate 10 can be bonded by high-strength resin adhesive, and the bonding fixation should be firm and reliable.

After the upper layer horizontal positioning fixing checking sleeve plate is installed, the surface of the side sleeve plate 11 and the surface of the middle sleeve plate 10 are required to be smooth, the joint surface of the joint is strictly smooth, the gap width is smaller than 0.5mm, the semicircular embedded bar perforation 13 is regular, and the diameter cannot be larger than +1mm of the outer diameter of the vertical rod 1. The inclined surfaces of the positioning block 17 and the positioning clamping plate 18 are precisely matched, and gaps cannot occur. After the edge sleeve plate 11 and the middle sleeve plate 10 are assembled, the longitudinal positioning deviation of the positioning block 17 and the positioning clamping plate 18 is smaller than 0.5mm.

The die carrier can be adopted for manufacturing when the precise positioning and fixing device is manufactured, the die carrier is used for supporting and assisting the molding of the precise positioning and fixing device, and the overall size of the molded precise positioning and fixing device is as follows: the total length is 1944mm, the width is 500mm, the widest part is the width 678mm of the upper layer horizontal positioning fixed check sleeve plate, and the height is 600mm of the thickness of the bottom of the ditch groove and 200mm = 800mm of the exposed length of the embedded steel bars 14.

The fixed frame long rod 2, the cross rod 4 and the vertical rod 1 of the precise positioning and fixing device are welded into a whole, and the upper layer horizontal positioning and fixing checking sleeve plate, the positioning toothed plate strip 3, the toothed plate strip buckle 5, the upper layer sleeve plate support buckle 8 and the lower layer height adjusting bolt 12 are manufactured by adopting a detachable method, so that the repeated utilization is facilitated, the materials are saved, and the cost is reduced.

It should be noted that: the length of the bottom plate of the assembled trench in one bin is 10m, the assembled trench is divided into units of 5 assembled side walls, namely 5 side wall components, and each side wall component is 2m long.

Step 1: firstly, measuring and paying off the length of a bin bottom plate by 10m, wherein 2m is the length of one side wall member, then accurately measuring and paying off the positions of the bottom plate embedded bars with the width of each side wall member, and marking the horizontal positions and the heights of four corners of the bottom plate embedded bars corresponding to each side wall member.

Step 2: and binding a bottom layer horizontal reinforcing steel bar net of the bottom plate of the ditch.

Step 3: the precise positioning and fixing device is placed in a gap of a bottom horizontal steel bar net of the bottom plate of the ditch, and is placed in a range of 40-60mm above the bottom horizontal steel bar net of the bottom plate of the ditch through a lower-layer height adjusting bolt 12, and the upright rod 1 falls on the bottom horizontal steel bar net of the bottom plate and does not contact the ground.

Step 4: according to the point positions of the paying-off, the plane positions of the front, back, left and right of the precise positioning fixing device are adjusted to enable the paying-off point positions to correspond to four side vertical rods, and then the height of the precise positioning fixing device is adjusted through the lower-layer height adjusting bolts 12 to enable the vertical rods 1 to be vertical, so that the precise positioning fixing device meets the position requirement of precision.

And the accurate plane position, the elevation and the verticality of the four-angle side upright bars are calibrated again through the paying-off point positions, namely, the accurate plane position, the elevation and the verticality of the four-angle side upright bars of the accurate positioning and fixing device are accurately adjusted, so that the accurate plane position, the elevation and the verticality can meet the position requirement of accuracy.

Step 5: in order to fixedly hold the upper layer horizontal positioning fixed check sleeve plate, an upper layer sleeve plate support buckle 8 is arranged on the upper portion of each vertical rod 1, and the installation position is that the upper layer sleeve plate support buckle 8 is 60mm away from the top of the vertical rod 1, so that enough space is reserved below the horizontal positioning fixed check sleeve plate for carrying out bottom plate concrete surface collecting.

The ground anchor holes are drilled on the periphery of the bottom of the precise positioning and fixing device, the precise positioning and fixing device is anchored by adopting the ground anchor rods 7, and the ground anchor rods 7 firmly anchor the periphery of the precise positioning and fixing device and play a role in fixing, and simultaneously support the whole weight of the precise positioning and fixing device and embedded bars and the construction external force.

And then, the lower parts 20-30mm of the upper sleeve plate support buckles 8 on the two adjacent side upright posts are firmly welded by beating an inclined stay bar 9, the lower ends of the inclined stay bars 9 are arranged in the precise positioning and fixing device and 20-40mm away from the neutral rod, and the inclined stay bars 9 play a role in supporting the precise positioning and fixing device frame system and preventing shaking and displacement.

Step 6: the upper layer horizontal reinforcement net of the binding canal bottom plate is carefully operated during binding, and the collision of the precision positioning and fixing device and the vertical rod 1 is prevented. After the upper layer horizontal reinforcement net is bound, the middle layer horizontal positioning fixing frame is positioned at the position 40-60mm below the upper layer horizontal reinforcement net of the bottom plate of the canal, and the upper layer horizontal positioning fixing checking sleeve plate is positioned at the position 180-200mm above the upper layer horizontal reinforcement net of the bottom plate of the canal or 50mm below the top end of the vertical rod 1.

Step 7: the plane position and the verticality of the precise positioning and fixing device are accurately calibrated again through the diagonal brace 9.

Step 8: the middle sleeve plate 10 on the upper layer is installed, so that the middle sleeve plate 10 is sleeved between the side vertical rods and the middle vertical rods from the upper side, and the horizontal height of the middle sleeve plate 10 is adjusted through the upper sleeve plate support buckle 8.

The rest 12 vertical rods 1 are arranged in the tooth sockets 6 which are not provided with the vertical rods 1, the vertical rods 1 are used as embedded bars, and the four side vertical rods are respectively straightened along the two-bolt ropes in the long side direction of the precise positioning and fixing device to be used as the top height standard of the embedded bars. Then the upper part of the upright 1 is penetrated into the semicircular steel bar perforation 13 of the middle sleeve plate 10, the top end of the upright is propped against the cotton rope, and the lower part of the upright 1 is put into the two corresponding tooth sockets 6, and is firmly fixed by electric welding or binding; the edge sleeve plate 11 and the middle sleeve plate 10 are combined, connected and locked.

Step 9: checking the plane position, the elevation and the verticality and the installation firmness of the embedded bars, and welding all the upright rods 1 with the fixed frame long rods 2 firmly after the installation firmness is qualified; and cutting off redundant vertical rods 1 higher than the designed height, and if the vertical rods 1 are not high enough, timely adjusting the height of the vertical rods 1 or dismantling and reworking. The upper opening of the top end of the vertical rod 1 is rounded and chamfered.

Step 10: and removing the middle and lower layer positioning toothed bar 3, removing the independent toothed bar buckle 5 on the middle layer horizontal positioning fixing frame, and separating and taking out the corresponding positioning toothed bar 3 from the fixing frame long rod 2.

On the basis of ensuring that the ground anchor rod 7 is firmly welded and can effectively support the precise positioning and fixing device, the toothed plate strip buckle 5 on the lower horizontal positioning and fixing frame is dismounted, and when the toothed plate strip buckle 5 is dismounted, the lifting adjusting screw 122 is unscrewed to enable the toothed plate strip buckle to leave the ground. The toothed bar buckle 5, the positioning toothed bar 3 and the lower layer height adjusting bolt 12 are all taken out for the next reuse, and the construction of the precise positioning and fixing device corresponding to one side wall component is completed.

Step 11: and 2-10, the construction of the precise positioning fixing devices corresponding to the other four side wall components is completed, 10m through ropes are pulled between the 5 precise positioning fixing devices to carry out position determination and precise verification, each precise positioning fixing device is ensured to be positioned between two adjacent precise positioning fixing devices, the position precision between the 5 precise positioning fixing devices reaches the design requirement, and the next procedure can be carried out after the position precision is qualified.

And finally, the precision positioning and fixing device and the upright 1 are subjected to installation precision and firmness inspection, the through length positions and the precision check of 5 units and 10m are performed, the next working procedure construction can be performed after the units are comprehensively qualified, and the repair and correction can be performed if the units are not reworked.

Step 12: erecting a peripheral template for installing a channel bottom plate after the inspection is qualified, and then pouring concrete; after the concrete pouring is completed and solidified for 1-2 days, the upper layer horizontal positioning and fixing check plate frame and the upper layer sleeve plate support buckle 8 are removed, and the protection of the exposed part of the vertical rod 1 is finished, namely the construction of the embedded steel bar of the 10m long bottom plate is completed. The exposed upright 1 is a steel bar for butt joint with a steel bar sleeve in the prefabricated side wall.

In the construction process, the vertical rod 1 of the precise positioning and fixing device can be directly used as an embedded steel bar, the fixed frame long rod 2 can be directly used as a horizontally distributed steel bar of the bottom plate horizontal steel bar net, and the cross rod 4 can be directly used as a single stirrup of the bottom plate horizontal steel bar net, so that a large amount of steel bar materials can be saved.

The positioning and fixing device has the characteristics of reasonable design, firm structure, precise manufacture, precise size, firm connection between the positioning and fixing device and the embedded bars, good overall stability, flexible assembly and easy construction, can ensure that the embedded bars and grouting bar sleeves are accurately aligned one by one, improves the precision, improves the installation quality and the installation speed, saves manpower, material resources, machinery, time and cost, reduces the working time below a hoisting member, improves the safety of personnel, accelerates the construction progress, greatly improves the quality and the safety guarantee, and can provide reference and help for embedded bars at the joint part of the embedded bars of similar assembly type ditches of water conservancy and construction industry, cast-in-place concrete of buildings and prefabricated members.

The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention, so that all equivalent changes or modifications of the structure, characteristics and principles described in the claims should be included in the scope of the present invention.

Claims

1. The precise positioning and fixing device for the embedded bars in the cast-in-situ bottom plate of the assembled trench side wall is characterized by comprising a lower layer horizontal positioning and fixing frame, a middle layer horizontal positioning and fixing frame, an upper layer horizontal positioning and fixing checking sleeve plate and a plurality of vertical rods (1);

the lower layer horizontal positioning fixing frame comprises two fixing frame long rods (2) which are arranged at intervals, positioning tooth battens (3) which are arranged below each fixing frame long rod (2) and a plurality of cross rods (4) which are connected with the two fixing frame long rods (2), the fixing frame long rods (2) and the positioning tooth battens (3) below the fixing frame long rods form long edges of the lower layer horizontal positioning fixing frame, and the cross rods (4) form short edges of the lower layer horizontal positioning fixing frame; a plurality of groups of tooth strip buckles (5) are arranged between each fixed frame long rod (2) and each positioning tooth strip (3) for connection, and a plurality of U-shaped tooth grooves (6) are formed in one side of each positioning tooth strip (3);

The middle layer horizontal positioning fixing frame and the lower layer horizontal positioning fixing frame have the same structure and are correspondingly arranged above the lower layer horizontal positioning fixing frame, a ground anchor rod (7) is arranged on a fixing frame long rod (2) of the lower layer horizontal positioning fixing frame, the ground anchor rod (7) is inserted into the ground, and a lower layer height adjusting bolt (12) is arranged on a toothed plate strip buckle (5) of the lower layer horizontal positioning fixing frame;

The vertical rods (1) are respectively arranged between the tooth sockets (6) corresponding to the middle-layer horizontal positioning fixing frame and the lower-layer horizontal positioning fixing frame to be connected, the vertical rods (1) are of reinforced structures, the vertical rods (1) are arranged between the corresponding tooth sockets (6), and the vertical rods (1) are welded and fixed with the fixed frame long rods (2) of the middle-layer horizontal positioning fixing frame and the lower-layer horizontal positioning fixing frame; the vertical rods (1) comprise side vertical rods arranged at corners of the lower horizontal positioning fixing frame and middle vertical rods arranged in the middle of the lower horizontal positioning fixing frame;

The top end of the vertical rod (1) extends upwards to exceed the middle-layer horizontal positioning fixing frame, and the bottom end of the vertical rod (1) extends to exceed the lower-layer horizontal positioning fixing frame; an upper layer sleeve plate support buckle (8) is arranged at the top end of each upright (1), an inclined strut (9) is arranged between the two upper layer sleeve plate support buckles (8) positioned at the corners of the middle layer horizontal positioning fixing frame, the inclined strut (9) is of a scissor supporting structure, and the inclined strut (9) is propped against the ground;

The upper layer horizontal positioning fixed check sleeve plate is correspondingly arranged above the middle layer horizontal positioning fixed frame, the upper layer horizontal positioning fixed check sleeve plate is propped against the upper layer sleeve plate supporting buckle (8), the upper layer horizontal positioning fixed check sleeve plate comprises a middle sleeve plate (10) and side sleeve plates (11) arranged on two sides of the middle sleeve plate (10), the middle sleeve plate (10) and the side sleeve plates (11) are matched and spliced and sleeved between the vertical rods (1), and the top ends of the vertical rods (1) exceed the upper layer horizontal positioning fixed check sleeve plate.

2. The precise positioning and fixing device for embedded bars in the cast-in-situ bottom plate of the fabricated trench side wall according to claim 1, wherein the fixed frame long rods (2) and the cross rods (4) are of reinforced bar structures, the cross rods (4) are welded between the two fixed frame long rods (2), and the cross rods (4) are vertically distributed with the fixed frame long rods (2);

the cross bars (4) comprise side cross bars positioned at two ends of the fixed frame long bar (2) and middle cross bars positioned in the middle of the fixed frame long bar (2), and the cross bars (4) are connected with the fixed frame long bar (2) to form a 'mesh' -shaped plane frame structure.

3. The precise positioning and fixing device for embedded bars in the cast-in-situ bottom plate of the fabricated trench side wall according to claim 1, wherein the fixed frame long rod (2) and the tooth grooves (6) are respectively positioned at two sides of the positioning tooth bar strip (3), and the fixed frame long rod (2) and the positioning tooth bar strip (3) are connected and fastened through the tooth bar strip buckle (5);

The toothed bar buckle (5) comprises a buckle seat I (51) and buckle covers I (52) and locking bolts I (53) hinged to two ends of the buckle seat I (51) respectively, the cross section of the buckle seat I (51) is in a 'Coal seam' shape, the buckle seat I (51) is enclosed between a fixed frame long rod (2) and a positioning toothed bar (3), the locking bolts I (53) are turned over to be connected with nuts above the buckle covers I (52), the nuts are tightly abutted on the buckle covers I (52), and the buckle covers I (52) are tightly abutted on the fixed frame long rod (2).

4. The precise positioning and fixing device for embedded bars in the cast-in-situ bottom plate of the fabricated trench side wall according to claim 3, wherein a plurality of ground anchors (7) are welded on a fixed frame long rod (2) of the lower horizontal positioning and fixing frame;

The lower-layer height adjusting bolt (12) comprises a fixed plate (121) connected with the first buckle seat (51), a lifting adjusting screw (122) vertically connected with the fixed plate (121) in a threaded mode and a locking nut (123) arranged on the lifting adjusting screw (122).

5. The precise positioning and fixing device for embedded bars in a cast-in-situ bottom plate of an assembled trench side wall according to claim 1, wherein the top ends of the side vertical rods and the middle vertical rods are respectively provided with an upper layer sleeve plate support buckle (8), and the inclined stay bars (9) are arranged between the upper layer sleeve plate support buckles (8) on the two adjacent side vertical rods;

The upper sleeve plate support buckle (8) is a fastening device made of steel and capable of being opened and closed, the upper sleeve plate support buckle (8) comprises a buckle seat II (81) and a buckle cover II (82) and a locking bolt II (83) which are hinged to two ends of the buckle seat II (81) respectively, the locking bolt II (83) is turned over to be connected with a nut above the buckle cover II (82), the nut is tightly abutted to the buckle cover II (82), the middle parts of the buckle cover II (82) and the buckle seat II (81) are concave arcs, and the buckle cover II (82) is matched with the buckle seat II (81) to clamp the vertical rod (1).

6. The precise positioning and fixing device for embedded bars in a cast-in-situ bottom plate of an assembled trench side wall according to claim 1, wherein the upper layer horizontal positioning and fixing check sleeve plate is of a rectangular plane plate frame structure, the middle sleeve plate (10) is arranged between two fixed frame long rods (2), the middle sleeve plate (10) is hollow, and two sides of the middle sleeve plate (10) are connected with the side sleeve plates (11) through bolts;

a plurality of semicircular steel bar perforations (13) are correspondingly formed on the joint surfaces of the middle sleeve plate (10) and the edge sleeve plate (11), the steel bar perforations (13) vertically correspond to the tooth grooves (6), and the steel bar perforations (13) on the middle sleeve plate (10) and the edge sleeve plate (11) are combined to form a round sleeve and are arranged on the vertical rod (1).

7. The precise positioning and fixing device for embedded bars in the cast-in-situ bottom plate of the fabricated trench side wall according to claim 6, wherein a plurality of wire plates (14) are arranged at the edges of the upper plane and the lower plane of the middle sleeve plate (10), a plurality of hole plates (15) are arranged at the edges of the upper plane and the lower plane of the side sleeve plate (11), the hole plates (15) are in one-to-one correspondence with the wire plates (14), and connecting bolts (16) are arranged between the corresponding hole plates (15) and the wire plates (14);

The edge of the upper plane and the lower plane of the middle sleeve plate (10) is also provided with a plurality of positioning blocks (17), each positioning block (17) is a quadrangular straight plate with one side being a bevel edge, the edge of the upper plane and the lower plane of the side sleeve plate (11) is also provided with a plurality of positioning clamping plates (18), each positioning clamping plate (18) is a quadrangular with one side being a bevel edge, one end of each positioning clamping plate (18) is in a straight plate shape, the other end of each positioning clamping plate is in upward warping of a sled shape, the positioning clamping plates (18) are in one-to-one correspondence with the positioning blocks (17), each positioning clamping plate (18) protrudes out of the side sleeve plate (11) and extends upwards in an arc shape, the middle sleeve plate (10) is clamped by the upper positioning clamping plate and the lower positioning clamping plates (18) and the positioning clamping plates (18) are propped against the positioning blocks (17), and the side walls of the positioning clamping plates (18) are in contact fit with the bevel edges of the positioning blocks (17).

8. The construction method of the precise positioning and fixing device based on the precise positioning and fixing device of the embedded bars in the cast-in-situ bottom plate of the fabricated trench side wall according to any one of claims 1 to 7 is characterized by comprising the following steps:

Step 4: according to the point positions of the paying-off, the front, back, left and right plane positions of the precise positioning and fixing device are adjusted to enable the paying-off point positions to correspond to four side vertical rods, and then the elevation of the precise positioning and fixing device is adjusted through a lower-layer height adjusting bolt (12);

step 5: an upper layer sleeve plate support buckle (8) is arranged on the upper part of each upright rod (1), so that the distance between the upper layer sleeve plate support buckle (8) and the top of the upright rod (1) is 60mm;

Ground anchor holes are drilled around the bottom of the precise positioning and fixing device, the precise positioning and fixing device is anchored by adopting a ground anchor rod (7), then inclined stay bars (9) are firmly welded at the positions 20-30mm below upper layer sleeve plate support buckles (8) on two adjacent side uprights, and the lower ends of the inclined stay bars (9) are arranged in the precise positioning and fixing device and 20-40mm away from a neutral rod;

step 7: the plane position and the verticality of the precise positioning and fixing device are accurately calibrated again through the diagonal brace (9);

step 8: the middle sleeve plate (10) on the upper layer is arranged, so that the middle sleeve plate is sleeved into the side upright posts and the middle upright posts from the upper side, and the horizontal elevation of the middle sleeve plate (10) is adjusted through the upper sleeve plate support buckle (8);

the method comprises the steps that upright rods (1) are installed in spare tooth grooves (6), the upright rods (1) serve as embedded bars, every two bolt ropes are straightened along the long side direction of the precise positioning and fixing device on the four sides respectively to serve as the top height standard of the embedded bars, then the upper parts of the upright rods (1) penetrate into semicircular steel bar perforation holes (13) of a middle sleeve plate (10) and the top ends of the semicircular steel bar perforation holes are abutted against the ropes, and meanwhile the lower parts of the upright rods (1) are placed into the two corresponding tooth grooves (6) and are fixed firmly by electric welding or binding; the edge sleeve plate (11) and the middle sleeve plate (10) are connected and locked in a combined way;

Step 9: checking the plane position, the elevation and the verticality and the installation firmness of the embedded bars, welding all the vertical rods (1) with the fixed frame long rods (2) firmly after the vertical rods are qualified, and cutting off redundant vertical rods (1) higher than the designed height;

Step 10: removing the middle and lower layer positioning toothed bar (3), removing the toothed bar buckle (5) on the middle layer horizontal positioning fixing frame, and separating and taking out the corresponding positioning toothed bar (3) from the fixing frame long rod (2);

then dismantling the toothed plate strip buckle (5), the positioning toothed plate strip (3) and the lower layer height adjusting bolt (12) on the lower layer horizontal positioning fixing frame, and taking out all the toothed plate strip buckle, the positioning toothed plate strip (3) and the lower layer height adjusting bolt, thus completing the construction of the precise positioning fixing device corresponding to one side wall component;

Step 11: repeating the steps 2-10 to finish the construction of the precise positioning and fixing devices corresponding to the other four side wall components, and pulling a 10m through rope between the 5 precise positioning and fixing devices to perform position determination and precise verification; then, the final precision positioning and fixing device and the vertical rod (1) are subjected to installation precision and firmness inspection;

Step 12: erecting a peripheral template for installing a channel bottom plate after the inspection is qualified, and then pouring concrete; after the concrete pouring is completed and solidified for 1-2 days, the upper layer horizontal positioning fixing check plate frame and the upper layer sleeve plate support buckle (8) are removed, and the protection of the exposed part of the embedded steel bar is finished, namely the construction of the embedded steel bar of the 10m long base plate is completed.