CN113638572B - Elevator hoistway and construction process thereof - Google Patents
Elevator hoistway and construction process thereof Download PDFInfo
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- CN113638572B CN113638572B CN202110912831.6A CN202110912831A CN113638572B CN 113638572 B CN113638572 B CN 113638572B CN 202110912831 A CN202110912831 A CN 202110912831A CN 113638572 B CN113638572 B CN 113638572B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F17/00—Vertical ducts; Channels, e.g. for drainage
- E04F17/005—Lift shafts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
An elevator shaft and a construction process thereof relate to the field of buildings. As a preferred scheme, the construction process of the elevator shaft comprises the steps of manufacturing a shaft top cover prefabricated block, a shaft middle section prefabricated block and a shaft bottom prefabricated block; step two, reserving dowel bars on the foundation; welding a through-length steel bar at the part, which is opposite to the through-length through hole of the well subbase precast block, in the reserved steel bar; placing the well subbase precast block, and pouring mortar into the through long through hole; placing the shaft middle section precast block, wherein the through long steel bar extends out of the through long through hole of the shaft middle section precast block, and pouring mortar into the through long through hole; step six, repeating the step five; and seventhly, placing the well top cover prefabricated block and pouring mortar. The reinforcing steel bar is coated in the concrete, and the problems in the background technology can be effectively solved by the assembled concrete technology.
Description
Technical Field
The invention relates to the field of buildings, in particular to a construction process of an elevator shaft.
Background
The products for additionally arranging the elevators outside the existing buildings throughout the country are usually of a steel structure or a cast-in-place concrete structure. However, the steel structure well has the defects of high fireproof and antirust requirements, high later maintenance cost and the like. The cast-in-place concrete structure has the problems of long construction period, large influence on the life of residents and the like.
Disclosure of Invention
The present invention aims to provide an elevator shaft to solve the above-mentioned technical problems.
The invention also aims to provide the construction process of the elevator shaft so as to solve the problem of preparing the elevator shaft.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
an elevator hoistway is characterized by comprising a hoistway top cover precast block, a hoistway middle section precast block and a hoistway bottom base precast block which are sequentially arranged from top to bottom;
the well top cover prefabricated block comprises a top and a first enclosing wall connected below the top;
the middle-section prefabricated block of the shaft comprises a second enclosing wall, and an elevator door is arranged on the second enclosing wall;
the well subbottom precast block comprises a base and a third enclosing wall connected above the base;
the first enclosing wall, the second enclosing wall and the third enclosing wall are all concrete prefabricated enclosing walls;
a reinforcing mesh is arranged in the wall surface of the concrete prefabricated enclosure wall, a through long through hole which penetrates through the wall surface of the concrete prefabricated enclosure wall from top to bottom is further formed in the wall surface of the concrete prefabricated enclosure wall, and through long reinforcing steel bars are inserted into the through long through hole;
the upper ends of the through-length steel bars penetrate through the through-length through holes of the first enclosing wall to extend into the top and are welded on the connecting steel bars in the top;
the lower end of the through long steel bar penetrates into the through long through hole of the third enclosing wall, and a reserved inserted bar reserved on the foundation is welded;
the well middle section prefabricated section has at least three and piles up from top to bottom, lead to long reinforcing bar and pass each well middle section prefabricated section that piles up from top to bottom in proper order.
As a preferable scheme, the construction process of the elevator shaft is characterized by comprising the following steps:
firstly, manufacturing a well top cover precast block, a well middle section precast block and a well subbase precast block, wherein a top is prefabricated on the well top cover precast block, and a base is prefabricated on the well subbase precast block;
step two, reserving dowel bars on the foundation;
welding through long steel bars at the part, which is opposite to the through long through hole of the well base precast block, in the reserved steel bars;
placing the well subbase precast block, wherein the through long steel bar extends out of the through long through hole of the well subbase precast block, the part of the reserved steel bar, which is not right opposite to the through long through hole of the well subbase precast block, is welded with the steel bar for connection in the well subbase precast block, and mortar is poured into the through long through hole of the well subbase precast block;
placing the shaft middle section precast block, wherein the through long steel bar extends out of the through long through hole of the shaft middle section precast block, and pouring mortar into the through long through hole of the shaft base precast block;
step six, repeating the step five until the number of the prefabricated blocks in the middle section of the shaft way meets the floor requirement of a building to be additionally provided with the elevator;
placing the well top cover prefabricated block, wherein the through long steel bar extends out of the through long through hole of the well top cover prefabricated block, and pouring mortar into the through long through hole of the well base prefabricated block until the through long steel bar reaches the welding position of the steel bar for connecting the through long steel bar and the well top cover prefabricated block;
and step eight, welding the through long steel bars with the well top cover prefabricated block by using the steel bars, and continuously filling the mortar after welding until the through long steel bars are flush with the top of the well top cover prefabricated block.
As another preferred scheme, the construction process of the elevator shaft is characterized by comprising the following steps:
firstly, manufacturing a well top cover precast block, a well middle section precast block and a well subbase precast block, wherein the well top cover precast block is not provided with a precast top and the well subbase precast block is not provided with a precast base;
step two, reserving dowel bars on the foundation;
welding through long steel bars at the part, which is opposite to the through long through hole of the well base precast block, in the reserved steel bars;
placing the well subbase precast block, wherein the through long steel bar extends out of the through long through hole of the well subbase precast block;
placing the shaft middle section precast block, wherein the through long steel bar extends out of the through long through hole of the shaft middle section precast block, and pouring mortar into the through long through hole of the shaft base precast block;
step six, repeating the step five until the number of the prefabricated blocks in the middle section of the shaft way meets the floor requirement of a building to be additionally provided with the elevator;
seventhly, placing the shaft top cover prefabricated block, wherein the through long steel bar extends out of the through long through hole of the shaft middle section prefabricated block;
and step eight, pouring mortar into the through long through hole of the well base prefabricated block until the mortar is flush with the top of the well top cover prefabricated block.
Casting a top in situ on the top of the well top cover prefabricated block and casting a base in situ on the bottom of the well base prefabricated block;
when the cast-in-place concrete is cast, firstly, connecting reinforcing steel bars and full-length reinforcing steel bars are welded, redundant full-length reinforcing steel bars are cut off after welding, then a pouring template is built, mortar is poured into the template, and the template is removed after the mortar is completely formed.
Has the advantages that:
1. the steel bar is coated in the concrete, so that the problems of fire prevention and rust prevention caused by leakage of a steel structure in the background art can be effectively solved.
2. The invention adopts the fabricated concrete technology, can manufacture the concrete prefabricated enclosing wall in a factory and then transport the enclosing wall to a construction site for construction, and can effectively solve the problems of long construction period, large influence on the lives of residents and the like of the cast-in-place concrete structure in the background technology.
Drawings
FIG. 1 is a schematic structural diagram of a hoistway roof precast block;
FIG. 2 is a schematic structural view of a middle-section precast block in a shaft;
FIG. 3 is a schematic view of the construction of a well base preform;
FIG. 4 is a partial structural schematic view of a cross section of a hoistway roof precast block;
FIG. 5 is a partial structural schematic diagram of a cross section of a middle section precast block in a hoistway;
FIG. 6 is a partial structural schematic view of a cross-section of a hoistway sub-base preform block;
FIG. 7 is a schematic view of the structure at the upper end face of the through channel;
FIG. 8 is a schematic illustration of a construction link;
fig. 9 is a schematic diagram of one configuration of an erected elevator hoistway;
fig. 10 is a schematic view of another configuration of an erected elevator hoistway;
fig. 11 is a schematic view of the structure of fig. 10 at a construction stage.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easily understood, the invention is further explained by combining the specific drawings.
Referring to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11, an elevator hoistway mainly includes a hoistway top cover precast block, a hoistway middle section precast block, a hoistway bottom base precast block, and a through-length reinforcing steel bar 11, which are sequentially arranged from top to bottom.
Shaft top cover prefabricated block
The well top cover prefabricated section comprises a top 3 and a first enclosing wall connected below the top 3. The first enclosing wall is a concrete prefabricated enclosing wall. The top 3 may be cast in place, or may be prefabricated with the first enclosure wall when the first enclosure wall is manufactured. The wall surface of the first enclosing wall is provided with a through long through hole 1 which penetrates through the wall surface from top to bottom, and the top 3 is provided with a first connecting hole which penetrates through the wall surface from top to bottom at a position corresponding to the through long through hole 1. A connecting steel bar 7 is embedded in the top 3, the shape of the connecting steel bar 7 in the top 3 is matched with the shape enclosed by the through-long through hole 1 on the first enclosing wall, and the connecting steel bar 7 partially leaks out of the through-long through hole 1. Optionally, a supporting steel bar is further arranged in the top 3, and two staggered points exist between any supporting steel bar and the connecting steel bar 7, and the supporting steel bar and the connecting steel bar are welded at the staggered points. Thereby increasing the supporting strength of the roof. And a steel wire mesh is also arranged in the top and is tensioned on the connecting steel bars 7, so that the supporting strength of the top can be increased.
Shaft middle prefabricated section
Well middle section prefabricated section includes the second enclosure, and the second enclosure is the prefabricated enclosure of concrete. The difference between the second enclosing wall and the first enclosing wall is that the second enclosing wall is provided with an elevator door 2. The height of the top of the elevator door 2 on the second fence is lower than the height of the top of the second fence. The bottom of the elevator door 2 on the second enclosure wall may be flush with the bottom of the second enclosure wall. At this time, after the elevator shaft is built, an elevator corridor is built and arranged in the area between the top of the elevator door 2 and the top of the second enclosing wall. It is also possible that the bottom of the elevator door 2 on the second enclosing wall is higher than the height of the bottom of the second enclosing wall. At this moment, after the elevator shaft is built, the elevator corridor is built together in the region between the top of the elevator door 2 and the top of the second enclosing wall and the region between the bottom of the elevator door 2 and the bottom of the second enclosing wall of the shaft middle section precast block located above the elevator door 2, and the elevator corridor plays the roles of filling the gap between the two shaft middle section precast blocks and enhancing the connection strength between the two shaft middle section precast blocks.
The elevator door 2 is opened on one side wall of the second enclosing wall, and the remaining three side walls of the second enclosing wall are preferably not provided with open windows, so that the integral strength is ensured. If the window is especially needed to be arranged, a vertical strip-shaped window can be arranged between two adjacent through long through holes 1. Thereby preventing damage to the through-length reinforcing bars 11 by the fenestration or cutting the through-length reinforcing bars 11 for avoiding the fenestration.
Prefabricated block for well subbottom
The well subbottom precast block comprises a base 4 and a third enclosing wall connected above the base 4. The third enclosing wall is a concrete prefabricated enclosing wall. The area of the cross section of the base 4 is preferably larger than the area of the figure enclosed by the outer contour of the cross section of the third enclosing wall. Thus, the larger base 4 is used for increasing the stability of the well base precast block. The base 4 is provided with a second connecting hole which penetrates up and down at the position corresponding to the through long through hole 1 of the third enclosing wall. The base 4 is equipped with the third connecting hole 8 that runs through from top to bottom in the position department that the reservation dowel bar that reserves on the foundation corresponds. And parts of the second connecting holes and parts of the third connecting holes are overlapped, and the overlapped parts are uniformly returned into the second connecting holes. A connecting reinforcing bar is embedded in the base 4. The connecting reinforcing steel bar in the bottom is composed of a plurality of reinforcing steel bar mesh plates 9, and the reinforcing steel bar mesh plates are formed by welding transverse reinforcing steel bars and longitudinal reinforcing steel bars in a staggered mode after transverse and longitudinal staggering. And any one third connecting hole is exposed out of the connecting reinforcing steel bar.
The through long through holes 1 on the first enclosing wall, the second enclosing wall and the third enclosing wall are opposite. A through-length steel bar 11 is inserted into the through-length through hole 1; the upper end of the through-length reinforcing steel bar 11 passes through the through-length through hole 1 of the first enclosing wall and extends into the top, and the upper end of the through-length reinforcing steel bar is welded on the connecting reinforcing steel bar in the top. The lower end of the through long steel bar 11 penetrates into the through long through hole 1 of the third enclosing wall, and a reserved dowel bar reserved on the foundation is welded. The well middle section prefabricated section has at least three and piles up from top to bottom, leads to long reinforcing bar 11 and passes each well middle section prefabricated section that piles up from top to bottom in proper order. When the through-length steel bar 11 is not long enough, the through-length steel bar 11 may be welded to the through-length steel bar 11 again. And a blocking piece 12 is further arranged in the through long through hole 1, the blocking piece 12 is sleeved on the through long steel bar 11, and concrete mortar is filled between the upper and lower adjacent blocking pieces 12. During construction, the first concrete prefabricated block can be penetrated firstly, then concrete mortar is poured, and the second concrete prefabricated block is penetrated, then the concrete mortar is poured. The stop piece 12 is allowed to slide up and down on the full length reinforcement 11. The separation blade 12 that is located the below plays the effect of avoiding the mortar in disorder to spill over, and the separation blade 12 that is located the top plays the effect of compaction concrete mortar, and the accessible slides from top to bottom simultaneously, adjusts the distance between two sections concrete mortar.
And horizontally distributed ribs 6 positioned in the horizontal direction can be arranged in the first enclosing wall, the second enclosing wall and the third enclosing wall, and the horizontally distributed ribs 6 are composed of four groups of square frame-shaped reinforcing steel bars. Each group of square frame-shaped reinforcing steel bars consists of two n-shaped first sub reinforcing steel bars, and the short sides of the two first sub reinforcing steel bars face each other and are connected in a staggered manner. Four groups of square frame-shaped reinforcing steel bars are sequentially staggered and connected end to form a square ring. And forming a square frame-shaped structure at each of four corners of the concrete prefabricated wall. Still be equipped with the vertical reinforcing bar 5 that is located vertical side in the prefabricated enclosure of concrete, at the bight of the prefabricated enclosure of concrete, be equipped with four vertical reinforcing bars 5, four vertical reinforcing bars 5 support respectively and connect the interior angle of the square frame column structure that horizontal distribution reinforcing bar formed at four bights of the prefabricated enclosure of concrete. At the position department that prefabricated enclosure of concrete removed the bight, the preferred equidistant vertical reinforcement 5 that is equipped with, vertical reinforcement 5 supports and connects the long limit of first sub-reinforcing bar. Thereby realizing the connection of the horizontal distribution rib 6 and the vertical reinforcing steel bar 5. Preferably, one of the vertical reinforcing bars 5 that supports on the long edge of same first sub-reinforcing bar is located the outside of first sub-reinforcing bar, and adjacent next is located the inboard of first sub-reinforcing bar. Therefore, the strength of the formed concrete prefabricated enclosing wall is improved by using the method of arranging the vertical steel bars 5 in an internally-externally staggered manner. The vertical reinforcing bars 5 may be provided in the top and bottom bases 4, but since the top and bottom bases 4 have a small height, a rectangular frame-like structure formed by bending one reinforcing bar is preferable. The vertical steel bars 5 and the junction points of the square frame-shaped steel bars can be detachably connected by a method of bundling thin steel wires, and can also be fixedly connected by a welding method. The connecting reinforcing bars 7 are preferably fixed to the square frame-shaped reinforcing bars. Four vertical steel bars 5 are preferably arranged around any through long through hole 1. To ensure structural strength.
The construction process of the elevator hoistway comprises the following steps: step one, manufacturing a well top cover prefabricated block, a well middle section prefabricated block and a well bottom prefabricated block; step two, reserving dowel bars on the foundation; welding a through-length steel bar 11 at the part, opposite to the through-length through hole 1 of the well subbase precast block, in the reserved steel bar; placing the well subbase precast block, wherein a through long steel bar 11 extends out of a through long through hole 1 of the well subbase precast block, a part of a reserved inserted bar, which is not right opposite to the through long through hole 1 of the well subbase precast block, is welded with a connecting steel bar 7 in the well subbase precast block, and mortar is poured into the through long through hole 1 of the well subbase precast block; placing the shaft middle section precast block, extending the through long steel bar 11 from the through long through hole 1 of the shaft middle section precast block, and pouring mortar into the through long through hole 1 of the shaft bottom precast block; step six, repeating the step five until the number of the middle-section precast blocks of the shaft way meets the floor requirement of the building to be additionally provided with the elevator; seventhly, placing the shaft way top cover precast block, wherein the through long steel bar 11 extends out of the through long through hole 1 of the shaft way top cover precast block, and pouring mortar into the through long through hole 1 of the shaft way bottom base precast block until the through long steel bar 11 reaches the welding position of the steel bar 7 for connecting the shaft way top cover precast block; and step eight, welding the through long steel bars 11 with the well top cover prefabricated block by using the steel bars 7, and continuously filling mortar after welding until the through long steel bars are flush with the top of the well top cover prefabricated block.
And when the well top cover prefabricated block does not have a prefabricated top or the well bottom prefabricated block does not have a prefabricated base 4, after the step eight, the method further comprises the step of casting the top of the well top cover prefabricated block in situ and/or casting the base 4 in situ at the bottom of the well bottom prefabricated block. When the cast-in-place concrete is used, firstly, the connecting reinforcing steel bars 7 and the full-length reinforcing steel bars are welded, redundant full-length reinforcing steel bars are cut off after welding, then a pouring template is built, mortar is poured into the template, and the template is removed after the mortar is completely formed. The mortar to be poured covers the welding points of the connecting reinforcing steel bars 7 and the full-length reinforcing steel bars. At this time, the welding step of welding the reinforcing steel bar 7 for connection and the reserved dowel bar in the fourth step is omitted, and the step of welding the full-length reinforcing steel bar and the reinforcing steel bar 7 for connection in the eighth step is omitted. The second step and the first step are not in sequence. Because the dowel bars are reserved when the foundation is dug. And step three, preferably, the steps are carried out according to the sequence.
And in the third step, when the reserved joint bars are welded with the full-length steel bars, the reserved joint bars and the full-length steel bars are preferably partially staggered, and the staggered parts are welded. Thereby increasing the welding surface and making the whole strength higher. The hole diameter of the through-hole 1 is preferably not less than 60mm. So as to facilitate welding, and simultaneously ensure that the reserved joint bars and the through-length steel bars can still pass through the through-length through holes 1 after being staggered. Lead to long reinforcing bar length not enough, lead to long reinforcing bar newly welding, do the extension in time, also have crisscross between two lead to long reinforcing bars, the welding of staggered position increases the face of weld equally, makes the bulk strength better. The staggered point of the through long steel bar and the reserved dowel bar and the staggered point of the through long steel bar and the through long steel bar for extension are preferably located on the same side of the through long steel bar. Therefore, the position of the full-length steel bar is conveniently adjusted, and the full-length steel bar is centered as much as possible. The length of the interleaved section is preferably not less than 30mm. The staggered part can be provided with a bell-mouth-shaped cover body, and the cover body covers the upper part of the staggered part, so that the outer contour of the cover body gradually increases from top to bottom, and the through-length reinforcing steel bars can smoothly enter the through-length through hole 1. The cover body is preferably a stainless steel cover body, and the lower end face of the cover body is preferably welded in the middle of the staggered part, so that the cover body is prevented from falling. The two can also be fixed together by clamping the upper end surface without welding.
In the above steps, in order to prevent the mortar from overflowing when the mortar is poured, the blocking piece 12 is preferably sleeved on the through-length steel bar. When the mortar is poured, one of the blocking pieces 12 is firstly stripped to the bottom of the precast concrete enclosing wall to be poured, the bottom of the through long through hole 1 is blocked, then the mortar is poured until the blocking pieces are flush with the top of the through long through hole 1, then the other blocking piece 12 is stripped, the poured mortar is pushed to descend until the blocking pieces are pressed tightly, and then the mortar is poured again until the blocking pieces are flush with the top of the through long through hole 1. The number of the blocking pieces in the same through long through hole 1 is different according to the material of the mortar. Foaming agents may be mixed into the mortar. The foaming agent slowly foams at a later stage, and further fills gaps in the through-long through hole 1.
In order to enable the poured mortar to smoothly flow downwards, the through long through hole 1 is connected with a communicating pore passage for exhausting, the front end of the communicating pore passage is communicated with the through long through hole 1, and the rear end of the communicating pore passage is communicated with the outside. The communicating pore channel provides an exhaust channel for the through long through hole 1, and can effectively exhaust gas in the communicating pore channel, so that the mortar flows down smoothly. In the first scheme, the communicating pore channel is an inclined pore channel, the front end of the communicating pore channel is positioned at the lowest part of the through long through hole 1, and the height of the rear end of the communicating pore channel is higher than that of the front end. Thereby removing the gas at the bottom of the through long channel and leading the mortar to enter the lowest part. According to the second scheme, the communicating pore channel is an inclined pore channel, the front end of the communicating pore channel is flush with the upper port of the through long through hole 1, a gap exists between the front end of the communicating pore channel and the upper port of the through long through hole, and the height of the rear end of the communicating pore channel is lower than that of the front end of the communicating pore channel; be equipped with the bar recess on leading to long through-hole 1's the bottom lateral wall, the bar recess is equipped with towards leading to the first notch of long through-hole 1 inboard, still is equipped with the flush second notch of lower port with leading to long through-hole 1, the port position that is located the front end with the intercommunication pore of second notch just right from top to bottom. Firstly, the communicating pore canal inclines downwards, so that the probability of rainwater entering the communicating pore canal can be reduced. In addition, the communication pore channel is positioned at the upper end of the concrete prefabricated enclosing wall and is used as an exhaust channel of the concrete prefabricated enclosing wall connected above, after exhaust is finished, mortar can enter the communication pore channel, and the mortar in the communication pore channel can further increase the connection strength between the two concrete prefabricated enclosing walls. And in the third scheme, the top surface of the concrete prefabricated enclosing wall is provided with strip-shaped grooves 10 with upward openings, the number of the strip-shaped grooves 10 is consistent with that of the through-long through holes 1, the strip-shaped grooves correspond to the through-long through holes one by one, and two ends of each strip-shaped groove are respectively positioned on two sides of the wall surface. The structure has similar effect with the structure of the second scheme, but the structure is simpler and has better consistency during preparation.
The difference between the structure of fig. 9 and the structure of fig. 10 is that the structure of fig. 10 also prefabricates the vestibule while the hoistway is prepared. The prefabricated enclosure of concrete is equipped with the vestibule top that the top of the wall of lift-cabin door outwards extended formation vestibule promptly, and the prefabricated enclosure of concrete is equipped with the both sides of the wall of lift-cabin door and outwards extends the lateral wall that forms the vestibule, and lateral wall and vestibule top are connected and are enclosed into the vestibule. The side wall of the corridor can be provided with a window for installing a window. Horizontal distribution muscle in the precast concrete enclosure also extends, extends to in the lateral wall of vestibule or the vestibule top of vestibule. The structure in fig. 10, elevartor shaft and the corridor of registering one's residence are even as an organic whole to guarantee that engineering quality is stable, combine closely, structural strength is high, rigidity is big.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. An elevator hoistway is characterized by comprising a hoistway top cover precast block, a hoistway middle section precast block and a hoistway bottom base precast block which are sequentially arranged from top to bottom;
the hoistway top cover prefabricated block comprises a top and a first enclosing wall connected below the top;
the middle-section precast block of the shaft comprises a second enclosing wall, and an elevator door is arranged on the second enclosing wall;
the well subbottom precast block comprises a base and a third enclosing wall connected above the base;
the first enclosing wall, the second enclosing wall and the third enclosing wall are all concrete prefabricated enclosing walls;
a reinforcing mesh is arranged in the wall surface of the concrete prefabricated enclosing wall, a through long through hole which penetrates through the wall surface of the concrete prefabricated enclosing wall up and down is further formed in the wall surface of the concrete prefabricated enclosing wall, and a through long reinforcing steel bar is inserted into the through long through hole;
the upper ends of the through-length steel bars penetrate through the through-length through holes of the first enclosing wall to extend into the top and are welded on the connecting steel bars in the top;
the lower end of the through long steel bar penetrates into the through long through hole of the third enclosing wall, and a reserved joint bar reserved on the foundation is welded;
at least three shaft middle-section precast blocks are stacked up and down, and the through long steel bars sequentially penetrate through the shaft middle-section precast blocks stacked up and down;
the first enclosing wall, the second enclosing wall and the third enclosing wall are all internally provided with horizontal distribution ribs in the horizontal direction, the horizontal distribution ribs are composed of four groups of square frame-shaped reinforcing steel bars, each group of square frame-shaped reinforcing steel bars is composed of two n-shaped first sub reinforcing steel bars, the short sides of the two first sub reinforcing steel bars face each other and are connected in a staggered way,
the concrete prefabricated enclosing wall is also internally provided with vertical steel bars in the vertical direction, four vertical steel bars are arranged at the corners of the concrete prefabricated enclosing wall, and the four vertical steel bars are respectively abutted against and connected with inner angles of a square frame-shaped structure formed by horizontally distributed steel bars at the four corners of the concrete prefabricated enclosing wall;
the method comprises the following steps that vertical steel bars are arranged at the positions of the concrete prefabricated enclosing wall except the corner parts at equal intervals, the vertical steel bars abut against and are connected with the long sides of first sub-steel bars, one of the vertical steel bars abutting against the long sides of the same first sub-steel bar is positioned on the outer side of the first sub-steel bar, and the next adjacent vertical steel bar is positioned on the inner side of the first sub-steel bar;
be equipped with the bar recess that the opening faces up on the top surface of precast concrete enclosure, the quantity of bar recess is unanimous with the quantity that leads to long through-hole, and the position one-to-one, and the both ends of bar recess are located the both sides of wall respectively.
2. The elevator shaft as claimed in claim 1, wherein the reserved steel bars are partially staggered with the full length steel bars, and the staggered parts are welded;
the staggered part of the reserved inserted steel bar and the through long steel bar is provided with a bell mouth-shaped cover body, the upper part of the staggered part is covered by the cover body, and the outer diameter of the cover body is gradually increased from top to bottom;
the cover body is a stainless steel cover body, and the lower end face of the cover body is welded in the middle of the staggered part.
3. The elevator hoistway of claim 1, wherein the full length reinforcement is provided with a stop tab;
when the mortar is poured, one of the blocking pieces is firstly rolled over to the bottom of the concrete prefabricated enclosing wall to be poured, the bottom of the through long through hole is blocked, then the mortar is poured until the blocking piece is flush with the top of the through long through hole, then the other blocking piece is rolled down, the poured mortar is pushed to move downwards until the blocking piece is pressed tightly, and then the mortar is poured again until the blocking piece is flush with the top of the through long through hole.
4. The construction process of the elevator hoistway is characterized by comprising the following steps:
firstly, manufacturing a well top cover precast block, a well middle section precast block and a well subbase precast block, wherein a top is prefabricated on the well top cover precast block, and a base is prefabricated on the well subbase precast block; the shaft top cover prefabricated block comprises a first enclosing wall connected below the top; the middle-section precast block of the shaft comprises a second enclosing wall, and an elevator door is arranged on the second enclosing wall; the well subbottom precast block comprises a third enclosing wall connected above the base; the first enclosing wall, the second enclosing wall and the third enclosing wall are all concrete prefabricated enclosing walls;
step two, reserving dowel bars on the foundation;
step three, welding a full-length steel bar at the part, opposite to the full-length through hole of the well base precast block, in the reserved steel bar;
placing the well subbase precast block, wherein the through long steel bar extends out of the through long through hole of the well subbase precast block, the part of the reserved steel bar, which is not right opposite to the through long through hole of the well subbase precast block, is welded with the steel bar for connection in the well subbase precast block, and mortar is poured into the through long through hole of the well subbase precast block;
placing the well middle section precast block, wherein the full-length steel bar extends out of the full-length through hole of the well middle section precast block, and pouring mortar into the full-length through hole of the well base precast block;
step six, repeating the step five until the number of the prefabricated blocks in the middle section of the shaft way meets the floor requirement of a building to be additionally provided with the elevator;
placing the well top cover precast block, wherein the through long steel bar extends out of the through long through hole of the well top cover precast block, and pouring mortar into the through long through hole of the well base precast block until the through long steel bar reaches the welding position of the steel bar for connecting the through long steel bar and the well top cover precast block;
step eight, welding the through-length steel bars with the prefabricated well top cover block by using steel bars, and continuously filling mortar after welding until the through-length steel bars are flush with the top of the prefabricated well top cover block;
the first enclosing wall, the second enclosing wall and the third enclosing wall are all internally provided with horizontal distribution ribs in the horizontal direction, the horizontal distribution ribs are composed of four groups of square frame-shaped reinforcing steel bars, each group of square frame-shaped reinforcing steel bars is composed of two n-shaped first sub reinforcing steel bars, the short sides of the two first sub reinforcing steel bars face each other and are connected in a staggered way,
the concrete prefabricated enclosing wall is also internally provided with vertical steel bars in the vertical direction, four vertical steel bars are arranged at the corners of the concrete prefabricated enclosing wall, and the four vertical steel bars are respectively abutted against and connected with inner angles of a square frame-shaped structure formed by horizontally distributed steel bars at the four corners of the concrete prefabricated enclosing wall;
the method comprises the following steps that vertical steel bars are arranged at the positions of the concrete prefabricated enclosing wall except the corner parts at equal intervals, the vertical steel bars abut against and are connected with the long sides of first sub-steel bars, one of the vertical steel bars abutting against the long sides of the same first sub-steel bar is positioned on the outer side of the first sub-steel bar, and the next adjacent vertical steel bar is positioned on the inner side of the first sub-steel bar;
be equipped with the opening strip recess up on the top surface of precast concrete enclosure, the quantity of strip recess is unanimous with the quantity that leads to long through-hole, and the position one-to-one, and the both ends of strip recess are located the both sides of wall respectively.
5. The construction process of the elevator hoistway is characterized by comprising the following steps:
step one, manufacturing a well top cover precast block, a well middle section precast block and a well subbase precast block, wherein the well top cover precast block is not provided with a precast top and the well subbase precast block is not provided with a precast base; the hoistway top cover precast block comprises a first enclosing wall; the well middle section precast block comprises a second enclosing wall; the well base precast block comprises a third enclosing wall; the first enclosing wall, the second enclosing wall and the third enclosing wall are all concrete prefabricated enclosing walls;
step two, reserving dowel bars on the foundation;
step three, welding a full-length steel bar at the part, opposite to the full-length through hole of the well base precast block, in the reserved steel bar;
placing the well subbase precast block, wherein the through long steel bar extends out of the through long through hole of the well subbase precast block;
placing the well middle section precast block, wherein the full-length steel bar extends out of the full-length through hole of the well middle section precast block, and pouring mortar into the full-length through hole of the well base precast block;
step six, repeating the step five until the number of the middle-section precast blocks in the shaft way meets the floor requirement of the building to be additionally provided with the elevator;
seventhly, placing the shaft top cover prefabricated block, wherein the through long steel bar extends out of the through long through hole of the shaft middle section prefabricated block;
and step eight, pouring mortar into the through long through hole of the well base precast block until the mortar is flush with the top of the well top cover precast block.
Casting a top in situ on the top of the well top cover precast block and casting a base in situ on the bottom of the well bottom precast block;
when in cast-in-place, firstly welding the connecting reinforcing steel bars and the through-length reinforcing steel bars, cutting off redundant through-length reinforcing steel bars after welding, then building a pouring template, pouring mortar into the template, and removing the template after the mortar is completely formed and dried;
the concrete prefabricated enclosing wall is also internally provided with vertical steel bars in the vertical direction, four vertical steel bars are arranged at the corners of the concrete prefabricated enclosing wall, and the four vertical steel bars are respectively abutted against and connected with inner angles of a square frame-shaped structure formed by horizontally distributed steel bars at the four corners of the concrete prefabricated enclosing wall;
the method comprises the following steps that vertical steel bars are arranged at the positions of the concrete prefabricated enclosing wall except the corner parts at equal intervals, the vertical steel bars abut against and are connected with the long sides of first sub-steel bars, one of the vertical steel bars abutting against the long sides of the same first sub-steel bar is positioned on the outer side of the first sub-steel bar, and the next adjacent vertical steel bar is positioned on the inner side of the first sub-steel bar;
be equipped with the bar recess that the opening faces up on the top surface of precast concrete enclosure, the quantity of bar recess is unanimous with the quantity that leads to long through-hole, and the position one-to-one, and the both ends of bar recess are located the both sides of wall respectively.
6. The construction process of the elevator shaft according to claim 4 or 5, wherein the diameter of the through-long through-hole in the shaft top cover precast block, the shaft middle section precast block and the shaft bottom precast block is not less than 60mm.
7. The construction process of the elevator shaft according to claim 4 or 5, wherein the reserved dowel bars and the full length steel bars are partially staggered, and the staggered parts are welded;
the staggered parts of the reserved insertion bars and the through long steel bars are provided with bell-mouth-shaped cover bodies, the upper parts of the staggered parts are covered by the cover bodies, and the outer diameters of the cover bodies are gradually increased from top to bottom.
8. The construction process of an elevator shaft according to claim 4 or 5, wherein the through reinforcement is covered with a baffle plate, and when the mortar is poured, one of the baffle plates is rolled up to the bottom of the prefabricated concrete enclosure to be poured to block the bottom of the through hole, then the mortar is poured until the through hole is flush with the top of the through hole, then the other baffle plate is rolled down and the poured mortar is pushed to the downward direction to be compacted, and then the mortar is poured again until the through hole is flush with the top of the through hole.
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| CN207672571U (en) * | 2017-12-21 | 2018-07-31 | 珠海华发建筑设计咨询有限公司 | Pile crown steel bar sleeve |
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| CN113638572A (en) | 2021-11-12 |
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