CN211229239U

CN211229239U - Assembled scissors type antidetonation stair

Info

Publication number: CN211229239U
Application number: CN201921333114.2U
Authority: CN
Inventors: 杜振东; 陆通; 叶创; 胡龙龙; 杨炀; 程苗; 胡登飞; 王凯
Original assignee: Wuhan Construction Engineering Co Ltd
Current assignee: Wuhan Construction Engineering Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-08-11
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses an assembled scissors type antidetonation stair, including last ladder beam, lower ladder beam and two prefabricated scissors bench, two crisscross settings of prefabricated scissors bench, the low side and the lower ladder beam sliding connection of prefabricated scissors bench, the high-end and the last ladder beam fixed connection of prefabricated scissors bench, partition plate place in the middle of two prefabricated scissors bench. The utility model discloses prefabricated component finished product is effectual, and the efficiency of construction is high, and the location is accurate, utilizes grouting behind the bolted connection, the simple operation; by adopting the structural form that one end is fixedly connected and one end is slidably connected, the stress condition of the stair under the earthquake action is improved while the integrity of the stair meets the requirement, so that the prefabricated scissor ladder section can only slide longitudinally along the long round hole under the earthquake action to release displacement, the earthquake energy is absorbed, the structural system is prevented from being damaged, and compared with the traditional integral cast-in-situ stair, the earthquake-resistant performance of the structure is greatly improved.

Description

Assembled scissors type antidetonation stair

Technical Field

The utility model relates to a building engineering's concrete structure stair technical field, concretely relates to assembled scissors type antidetonation stair.

Background

The stairs are important components of multi-storey and high-rise building buildings, have various structural forms, wherein the scissor type stairs are special, are mainly used in shopping malls and high-rise buildings, and are designed to save the use area, meet the requirements of safe evacuation of large-flow personnel and have excellent anti-seismic performance. However, the construction method of the scissor-type stairs at the present stage mainly adopts a cast-in-place mode, namely, the procedures of formwork support, reinforcement binding, pouring, maintenance and the like are carried out on a construction site, the construction is complex, the construction period is long, the consumption of the formwork is high, and the construction waste is easy to generate to cause adverse effects on the environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a construction simple operation, installation accuracy height, assembled scissors type stair of higher anti-seismic performance, its structural principle is prefabricated beam type stair, prefabricated scissors bench low side and lower ladder beam sliding connection, the high-end and the last ladder beam fixed connection of prefabricated scissors bench utilize its low distolateral sliding connection to satisfy stair anti-seismic performance.

In order to further realize the above purpose, the utility model adopts the following technical scheme: the utility model provides an assembled scissors type antidetonation stair, includes ladder beam, underbladder beam and two prefabricated scissors bench, and two prefabricated scissors bench are crisscross to be set up, the low side and the underbladder beam sliding connection of prefabricated scissors bench, the high-end and the last bench beam fixed connection of prefabricated scissors bench, partition plate place in the middle of two prefabricated scissors bench.

The utility model discloses a concrete embodiment, pre-buried stock in the lower ladder roof beam, the stock bottom is provided with the anchor slab, and lower ladder roof beam top is provided with cement mortar screed-coat and upper berth polytetrafluoroethylene board, and prefabricated scissors bench lower extreme reservation has lower cavity, and lower cavity middle part sets up the steel sheet that has the slotted hole, and the steel sheet is used for penetrating the stock, and the bolt is installed at the top of stock, and the mortar shutoff is adopted to the bolt top.

In one embodiment of the utility model, the anchor rod is pre-embedded in the upper ladder beam, the bottom of the anchor rod is provided with the anchor plate, and the top of the upper ladder beam is provided with the cement mortar leveling layer; an upper cavity used for accommodating an anchor rod and filling C40-grade grouting material is reserved at the upper end of the ladder section of the prefabricated scissors, and mortar is used for blocking the upper part of the upper cavity.

The utility model discloses a concrete embodiment, from upwards filling in proper order has polyphenyl board and PE stick down in the vertical space of going up ladder beam, lower ladder beam and the formation of prefabricated scissors bench department of meeting, and it has gluey to annotate above the PE stick.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses prefabricated component finished product is effectual, and the efficiency of construction is high, and the location is accurate, utilizes grouting behind the bolted connection, the simple operation; by adopting the structural form that one end is fixedly connected and one end is slidably connected, the stress condition of the stair under the earthquake action is improved while the integrity of the stair meets the requirement, so that the prefabricated scissor ladder section can only slide longitudinally along the long round hole under the earthquake action to release displacement, the earthquake energy is absorbed, the structural system is prevented from being damaged, and compared with the traditional integral cast-in-situ stair, the earthquake-resistant performance of the structure is greatly improved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of the assembled shear-type earthquake-proof staircase of the present invention;

FIG. 2 is a schematic view of the connection structure of the lower end of the ladder section and the lower ladder beam of the prefabricated scissors of the present invention;

fig. 3 is the connecting structure schematic diagram of the upper end of the ladder section of the prefabricated scissors and the upper ladder beam of the utility model.

In the figure: 1-upper ladder beam, 2-lower ladder beam, 3-prefabricated scissor ladder sections, 4-anchor plate, 5-anchor rod, 6-steel plate, 7-bolt, 8-cement mortar leveling layer, upper laying of polytetrafluoroethylene plate, 9-polystyrene plate, 10-PE rod, 11-glue, 12-mortar, 13-lower cavity, 14-cement mortar leveling layer and 15-C40 level grouting material.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The embodiment of the utility model provides an assembled scissors type antidetonation stair, as shown in fig. 1-3, including last ladder beam 1, lower ladder beam 2 and two prefabricated scissors bench 3, two crisscross settings of prefabricated scissors bench 3, the low side and the 2 sliding connection of lower ladder beam of prefabricated scissors bench 3, the high-end and 1 fixed connection of last ladder beam of prefabricated scissors bench 3, partition plate places in the middle of two prefabricated scissors bench 3.

As shown in fig. 2, an anchor rod 5 is pre-buried in a lower ladder beam 2, threads are turned at two ends of the anchor rod 5, an anchor plate 4 is arranged at the bottom of the anchor rod 5, a cement mortar leveling layer is arranged at the top of the lower ladder beam 2, and a polytetrafluoroethylene plate 8 is paved at the upper part, wherein the top of the lower ladder beam 2 is leveled by cement mortar with the thickness of 15mm, the elevation of the prefabricated scissor ladder section is controlled, and then the polytetrafluoroethylene plate with the thickness of 5mm is paved at the upper part, so that when the prefabricated scissor ladder section slides under external force, a lubricating effect is provided; 3 lower extremes of prefabricated scissors bench have cavity 13 down in advance, cavity 13 middle part sets up the steel sheet 6 that has the slotted hole down, steel sheet 6 is used for penetrating down 2 anchor rods 5 of ladder beam, bolt 7 is installed at the top of anchor rod 5, the lateral displacement of fixed prefabricated scissors bench 3, make prefabricated scissors bench 3 can only be along slotted hole longitudinal sliding, bolt 7 top adopts the shutoff of mortar 12, the protection bolted connection avoids destroying and has the pleasing to the eye effect of flattening.

As shown in fig. 3, an anchor rod 5 is embedded in the upper ladder beam 1, an anchor plate 4 is arranged at the bottom of the anchor rod 5, and a cement mortar leveling layer 14 with the thickness of 15mm is arranged at the top of the upper ladder beam 1 and is used for adjusting and controlling the elevation of the ladder section of the prefabricated scissors; an upper cavity used for containing the anchor rod 5 and filling C40 grouting material 15 is reserved at the upper end of the prefabricated scissor ladder section 3, and mortar 12 is used for plugging the upper cavity, so that the prefabricated scissor ladder section has the effect of leveling and beautifying.

As shown in figures 2 and 3, polystyrene boards 9 and PE rods 10 are sequentially filled in vertical gaps formed at the joints of the upper ladder beam 1, the lower ladder beam 2 and the prefabricated scissor ladder sections 3 from bottom to top, and glue 11 is injected above the PE rods 10. The functions of sealing, corrosion prevention, heat preservation, pressure resistance and the like are achieved together, and meanwhile, the prefabricated shear ladder section plays a role in buffering under the deformation effect, so that the anti-seismic performance is improved.

In actual construction, as shown in fig. 2, anchor rods 5 are embedded in the lower ladder beam 2, anchor plates 4 are welded at the bottoms of the anchor rods 5 in advance, and a cement mortar leveling layer is adopted at the top of the lower ladder beam 2, and polytetrafluoroethylene plates 8 with the thickness of 5mm are paved on the top of the lower ladder beam. A lower cavity 13 is reserved when the lower end of the prefabricated scissor ladder section 3 is prefabricated, a steel plate 6 with a long round hole is embedded in the lower cavity 13 and used for penetrating the anchor rod 5 embedded in the lower ladder beam 2, the bolt 7 and the anchor rod 5 are connected and screwed down after positioning and installation, and mortar 12 plugging is carried out on the bolt.

In actual construction, as shown in fig. 3, anchor rods 5 are embedded in the upper ladder beam 1, anchor plates 4 are welded at the bottoms of the anchor rods 5 in advance, and a cement mortar leveling layer 14 is adopted on the upper surface of the upper ladder beam 1. An upper cavity is reserved when the upper end of the prefabricated scissor ladder section 3 is prefabricated, the upper cavity is used for accommodating the anchor rods 5 pre-buried in the upper ladder beam 1 and filling grouting materials, after the prefabricated scissor ladder section 3 is accurately positioned, C40-grade grouting materials 15 are injected into the upper cavity, a plugging port is reserved on the plugging port, and mortar 12 plugging is carried out.

Filled polystyrene boards 9 and PE rods 10 are arranged in vertical gaps formed by vertical surfaces of the upper end part and the lower end part of the prefabricated scissor ladder section 3, the upper ladder beam 1 and the lower ladder beam 2 from bottom to top, and glue is injected 11 from the upper side. And during actual construction, the construction is finished by sequentially filling.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood that the invention is not limited thereto, and that various modifications and changes can be made by those skilled in the art without departing from the principles of the invention.

Claims

1. The assembled scissors type earthquake-resistant stair is characterized by comprising an upper stair beam (1), a lower stair beam (2) and two prefabricated scissors stair sections (3), wherein the two prefabricated scissors stair sections (3) are arranged in a staggered mode, the lower ends of the prefabricated scissors stair sections (3) are in sliding connection with the lower stair beam (2), the high ends of the prefabricated scissors stair sections (3) are fixedly connected with the upper stair beam (1), and partition boards are placed between the two prefabricated scissors stair sections (3);

an anchor rod (5) is pre-buried in the lower ladder beam (2), an anchor plate (4) is arranged at the bottom of the anchor rod (5), a cement mortar leveling layer is arranged at the top of the lower ladder beam (2), a polytetrafluoroethylene plate (8) is paved at the upper part of the cement mortar leveling layer, a lower cavity (13) is reserved at the lower end of the prefabricated shear ladder section (3), a steel plate (6) with a long circular hole is arranged in the middle of the lower cavity (13), the steel plate (6) is used for penetrating into the anchor rod (5), a bolt (7) is installed at the top of the anchor rod (5), and mortar (12) is adopted;

an anchor rod (5) is embedded in the upper ladder beam (1), an anchor plate (4) is arranged at the bottom of the anchor rod (5), and a cement mortar leveling layer (14) is arranged at the top of the upper ladder beam (1); an upper cavity used for accommodating an anchor rod (5) and filling C40-grade grouting material (15) is reserved at the upper end of the prefabricated shear ladder section (3), and mortar (12) is used for blocking the upper cavity.

2. An assembled scissor type earthquake-proof stair according to claim 1, wherein a polystyrene board (9) and a PE rod (10) are sequentially filled in a vertical gap formed at the joint of the upper ladder beam (1), the lower ladder beam (2) and the prefabricated scissor ladder section (3) from bottom to top, and glue (11) is injected above the PE rod (10).