CN104234447A - Tool-type suspension staircase for deep foundation pit - Google Patents
Tool-type suspension staircase for deep foundation pit Download PDFInfo
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- CN104234447A CN104234447A CN201410490893.2A CN201410490893A CN104234447A CN 104234447 A CN104234447 A CN 104234447A CN 201410490893 A CN201410490893 A CN 201410490893A CN 104234447 A CN104234447 A CN 104234447A
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Abstract
The invention discloses a tool-type suspension staircase for a deep foundation pit. The tool-type suspension staircase comprises a ladder assembly, a ladder assembly supporting seat and a staircase body, wherein the ladder assembly consists of two groups of ladder assembly units, a gap for installing the staircase body is arranged between the two groups of ladder assembly units, each group of ladder assembly unit comprises four stand columns, the cross section of each ladder assembly unit is in a rectangular shape, the upper end of each stand column is perpendicularly and fixedly connected with a steel beam above the stand column, and the lower end of each stand column perpendicularly stretches to the bottom surface of the foundation pit; the ladder assembly supporting seat is fixedly connected with a foundation pit enclosure, the ladder assembly supporting seat comprises two or four steel beams, and the steel beams are fixed on the upper surface of a crown beam of the enclosure structure; the staircase body is installed between the two groups of ladder assembly units from top to bottom in sequence, a corner between two adjacent staircase bodies is provided with a resting platform, and the resting platform is fixed in the internal space of the ladder assembly units. The staircase has a suspension characteristic and is installed from top to bottom, so that the staircase can be tightly combined with the procedure of the foundation pit project; the staircase is convenient for construction personnel to pass, high is safety, high in disassembling and installation speed and high in circulation rate.
Description
Technical field
The invention belongs to construction engineering technical field, relate to a kind of stair for construction site security protection, be specifically related to the tool type stairs of a kind of hanging in deep foundation ditch.
Background technology
Foundation ditch (foundation pit) is by the heatable adobe sleeping platform that substrate absolute altitude and basic plane size are excavated in basic engineering position.Building foundation pit refers to the below ground space of excavating with the construction of basement for carrying out building (comprising structure) basis.Foundation ditch belongs to temporary work, and its effect is to provide a space, makes the operation of building by laying bricks or stones on basis be able to carry out according to the position specified by design.Matter No. 200987 literary compositions are built about printing and distributing " notice of dangerous larger part-to-item project safety management way " regulation according to the Ministry of Construction, general deep foundation ditch refer to cutting depth more than 5 meters (containing 5 meters) or basement more than three layers (containing three layers), though or the degree of depth is not more than 5 meters, the engineering that geological conditions and surrounding environment and underground utilities are complicated especially.
Base pit engineering mainly comprises foundation pit supporting system design and construction and soil excavation, is a comprehensive very strong system engineering.Base pit engineering requires geotechnical engineering and Structural Engineering technician close fit.Base pit engineering to be faced down excavation underground space by ground, and deep foundation ditch surrounding generally arranges vertical gear fortifield village protection structure, and space enclosing structure is generally plate (stake) wall construction having certain insertion depth under excavation face substrate.Described plate (stake) wall mainly contains cantilevered, single support formula, many supports formula.In order to reduce the distortion of space enclosing structure, controlling the moment of flexure of body of wall, needing to arrange braced structures in foundation ditch surrounding.As for deep footing groove enclosing structure type, there are the types such as plate column type, colonnade formula, Gravity Retaining Wall, combined type and soil bolt, reverse masonry method, open caisson China's application is more.
In foundation pit construction, packway enters foundation ditch or cripple upstairs.Packway belongs to disposable peace and tears structure open, namely props up and takes complete bringing into use, and along with structure construction progress, when packway position hinders structure construction, just by disposable whole dismounting, completes position set up separately at this Rotating fields.The scaffold of deep foundation ditch People's Bank of China packway many employings is in the past set up, and because this People's Bank of China packway belongs to general provisional facility, sets up simple and easy, there is many potential safety hazards, very easily cause personnel's high fall accident.Moreover, the scaffold overwhelming majority upwards need set up from substrate, be not inconsistent with deep foundation pit earthwork digging operation, often can not regularly in time set up in soil excavation process, constructor carries out construction operation mainly through the motor vehicle upper and lower foundation ditch of packway that is unearthed, there is the mixed row of people's car, protect many potential safety hazards such as not in place, be also difficult to meet the requirement of engineering safety civilized construction simultaneously, be also unfavorable for that construction rapid tissue is implemented with efficient.
Along with the paces of subway construction and Urban Underground Space Excavation are constantly accelerated, deep-foundation pit engineering, just towards the future development of " close, dark, large ", for ensureing the safety of constructor, must make the lower channel stair of safety standard.At present, the instrument of the upper and lower foundation ditch in job site mostly is steel cat ladder.This easy steel cat ladder is all be welded by the material such as steel pipe, angle steel substantially, there is many defects.The defect main manifestations of this type of walkway is: one is that disassembly process is loaded down with trivial details, takes a lot of work, bothersome; Two is around unshielded structures, and security performance is low; Three be unfavorable for turnover use, recycling rate of waterused compared with low, waste of material is large.
For the technological deficiency that above-mentioned involved existing deep foundation ditch stair exist, at present, disclosed patent is few in number, is now described the existing patent retrieved.
Patent document CN201962965U discloses a kind of Cadge ladder for construction of deep base pit, the cage ladder merogenesis all identical with size by multiple structure is assemblied to form from bottom to up successively, and multiple cage ladder merogenesis to be laid on same vertical curve and to be fastenedly connected by fastening connection piece between adjacent two cages ladder merogenesis; Cage ladder merogenesis comprises cube shaped peripheral skeleton, is laid in the safeguard structure of peripheral skeleton surrounding side and is arranged on peripheral intraskeletal staircase; The staircase that multiple cage ladder merogenesis inside is installed is communicated with the fold-line-shaped lower channel for constructor's walking in composition Deep foundation Pit excavation from top to bottom, and the vertical height of described fold-line-shaped lower channel is corresponding with the degree of depth of constructed deep foundation ditch.The processing and fabricating of this patent and assembled convenience, assembled height adjustable, can solve the inconvenience of existing deep foundation ditch lower channel personnel upper and lower foundation ditch, staircase takies the practical problems such as area of base is large, mobile inconvenience.
Patent document CN202731730U discloses and a kind ofly builds the packaging escape stair in foundation ditch, comprises two side stands, connects the bar of more than ten pieces stair steps of two side stands and both sides; Every side stand forms parallelogram lever by front stairs beam, back stairs beam, upper waling stripe and lower waling stripe; The overhanging end of upper and lower waling stripe is bolted on foundation ditch respectively along the concrete foundation base in ground and foundation ditch; The medial surface of front stairs beam and back stairs beam is laid with more than ten jacks, coordinates with the latch in bight, stair step bottom surface four; By the grafting of latch and jack, stair step is in place.On every side, waling stripe is vertical with the junction of back stairs back end is provided with upper pillar stand, and lower waling stripe is vertical with the junction of front stairs beam bottom is provided with lower pillar stand, and both are connected by bar.The advantage of this patent is settled flexibly, Stability Analysis of Structures.
Patent document CN203213639U discloses a kind of modular stairway for foundation ditch, comprise multiple linkage unit, each linkage unit includes the bottom girder be parallel to each other for a pair, at least two foundation gears, end gear to be arranged at respectively between two foundation beams and to be firmly connected with bottom girder, at least four montants, every two montants are one group, longitudinally be arranged on two foundation beams respectively, at least two cross bars, two cross bars are located at the top of two montants respectively and are firmly connected with montant; Also comprise some longitudinal adapter sleeves and cross bar brace; Between each linkage unit, link the bottom girder of each linkage unit and cross bar by longitudinal adapter sleeve and cross bar brace and the longitudinal direction realizing each linkage unit is connected.This patent have can install at the scene, time saving and energy saving, all elements are dismountable, can repeat the beneficial effect installed and used.
Patent document CN203755717U discloses a kind of upper and lower walkway of deep foundation ditch assembling, comprise and erect by four square tube columns the left fixed mount and right fixed mount that are formed by rectangle four vertex positions respectively, left fixed mount and right fixed mount in the vertical direction are intervally distributed with multi-layer stair platform respectively, and left fixed mount landing and right fixed mount landing in height stagger at interval, landing side is connected by a stairway step plate be obliquely installed with the last layer landing being positioned at relative side fixed mount, landing opposite side is connected by the stairway step plate be obliquely installed with lower first floor ladder platform.The advantage of this patent have employed fabricated construction, and disassembly process is simple, can repeated disassembled and assembled reuse.
Though it is pointed out that the stair involved by above-mentioned patent improve existing deep foundation ditch stair, the design of stair is still reasonable not, can not meet the different construction area of deep-foundation pit engineering or the current requirement in stage; Further, being installed as of stair is installed from bottom to up, and this and deep foundation pit earthwork digging operation are not inconsistent, can not completely and pit earthwork excavates, slope retaining and subsequent structural working procedure are combined closely.For this reason, need to design a kind of deep foundation ditch stair directly applied in open cut underground space engineering, subway engineering or other underground engineering construction work progress.
Summary of the invention
The object of the present invention is to provide a kind of deep foundation ditch tool-type to hang stair, provide for constructor is current safety with convenient, and make it have the advantages such as dismounting speed is fast, turnover rate is high, security performance is good.Importantly, tool-type of the present invention hanging stair, can completely and pit earthwork excavates, slope retaining and subsequent structural working procedure are combined closely, applicable cutting depth 10 ~ 30m deep foundation ditch.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of deep foundation ditch tool-type hangs stair, comprise the ladder be arranged in foundation ditch, support the ladder bearing of ladder and be arranged on the stair of ladder inner space, it is characterized in that, described ladder bearing is fixedly connected with foundation pit enclosure structure, ladder bearing comprises 2 or 4 girder steels, and the one or both ends of girder steel are fixed on the upper surface of space enclosing structure Guan Liang; Described ladder is made up of two groups of ladder unit, be provided with the gap of installing stair between two groups of ladder unit, often organize ladder unit and comprise 4 columns, the cross section of ladder unit is rectangular, the upper end of column is fixedly connected with the girder steel above it is vertical, and foundation ditch bottom surface is vertically stretched in the lower end of column; Described stair are arranged in the space between two groups of ladder unit from top to bottom successively, and the corner between adjacent stair arranges half space, and half space is fixed on the inner space of ladder unit.
Described ladder bearing can comprise 4 identical girder steels and be arranged on foundation ditch on one side, girder steel is arranged in parallel and all mutually vertical with the space enclosing structure Guan Liang of foundation ditch, one end of girder steel and the upper surface of space enclosing structure Guan Liang are by bolt and be welded and fixed, and the free end of 4 girder steels is positioned at the top of foundation ditch; The upper surface of described girder steel arranges several lateral connection bars, and lateral connection bar be arranged in parallel and mutually vertical with girder steel in the horizontal direction, and lateral connection bar and girder steel are bolted to connection.
Described ladder bearing also can comprise horizontal diagonal brace, bearing diagonal and floor of putting more energy into; Described horizontal diagonal brace is arranged on the side of outside girder steel, and one end of horizontal diagonal brace is fixedly connected with space enclosing structure Guan Liang by the pre-embedded bolt being embedded in space enclosing structure Guan Liang, and the other end of horizontal diagonal brace is connected with a plate bolt, and junction plate welds with girder steel; Described bearing diagonal is arranged on the below of girder steel, and one end of bearing diagonal is fixedly connected with space enclosing structure Guan Liang by the pre-embedded bolt being embedded in space enclosing structure hat beam sides, and the other end of bearing diagonal is connected with girder steel bolt by a backing plate, and backing plate welds with girder steel; Described floor of putting more energy into is welded on the free end of girder steel.
Described ladder bearing also can comprise 2 girder steels and be arranged on the rotation angle position of foundation ditch, and girder steel is arranged in parallel, and the angle on the corner limit of girder steel and foundation ditch is 45 degree, the two ends of each girder steel all with the upper surface of space enclosing structure Guan Liang by bolt be welded and fixed; Weld 2 groups of cross one another reinforcing bars or small size shaped steel between described 2 girder steels, reinforcing bar or small size shaped steel are arranged on the outside of ladder unit.
Described ladder bearing also can comprise bearing diagonal; Described bearing diagonal is arranged on the below of girder steel, and one end of bearing diagonal is fixedly connected with space enclosing structure Guan Liang by the pre-embedded bolt being embedded in space enclosing structure hat beam sides, and the other end of bearing diagonal is connected with girder steel bolt by a backing plate, and backing plate welds with girder steel.
The junction of described girder steel and space enclosing structure Guan Liang can be provided with backing plate, pre-embedded bolt in space enclosing structure hat beam is connected with girder steel by backing plate, the upper surface of backing plate and girder steel solder design, be filled with grouting material in the gap between the soffit of backing plate and the upper surface of space enclosing structure Guan Liang.
Described column is fixedly connected with by bolt with girder steel, between column and girder steel, be provided with junction plate, and bolt connects column and girder steel through junction plate, the upper surface of junction plate and girder steel solder design.
Described stair can comprise step plate, step plate gripper shoe and be arranged on the guard rail of step plate both sides, and step plate is welded in step plate gripper shoe, and the end of step plate gripper shoe is welded with column, described guard rail is provided with closed metal net.
Described half space can comprise frame, several supporting parts and landing slab, and the corner of described frame is connected with the column forming ladder unit, and supporting part is welded on the inside of frame in parallel, and landing slab is laid in the plane at frame and supporting part place; The side of described half space arranges guard rail, guard rail is provided with closed metal net.
The corner of described half space is fixedly connected with column by channel-section steel, the waist height portion of channel-section steel welds with column, the upper leg wide portion upper surface of channel-section steel installs half space, and the wide portion of lower leg of channel-section steel is connected with the bolt of the angle bar be arranged on below channel-section steel, and the another side of angle bar welds with column.
Compared with the existing stair being applicable to deep foundation ditch, the beneficial effect that the present invention has is as follows:
(1) along with the continuous propelling of green construction, safety construction, make safety device standardization formula, tool-type is the effective way realizing Sustainable Construction Industry.Obviously, deep foundation ditch tool-type hanging stair provided by the invention meet this idea of development, can directly apply in open cut underground space engineering, subway engineering or other underground engineering construction work progress, be particularly useful for cutting depth 10 ~ 30m deep foundation ditch.
(2) deep foundation ditch stair of the present invention have hanging feature, in pit earthwork excavation and space enclosing structure work progress, install staircase component from top to bottom according to actual conditions; In Main Underground body structure construction process, can select to dismantle staircase component from the bottom to top; Distance for stair distance from bottom foundation ditch bottom surface is less than the part of staircase component height, and design of coupler scaffold pipe can be used to set up interim packway as a supplement, fully can meet the current demand of deep-foundation pit engineering different construction stage.Therefore, the present invention can completely and pit earthwork excavates, slope retaining and subsequent structural working procedure are combined closely.
(3) in deep foundation ditch tool-type of the present invention hanging stair, girder steel, as main bearing member, has different mounting meanss, and such as 4 girder steels are fixed on the same of foundation ditch, or 2 girder steels are fixed on the corner of foundation ditch.Therefore, the present invention according to concrete construction needs, can select different steel girder erection modes, has available property.When the hat beam cross sectional dimensions of foundation ditch be difficult to meet girder steel torque arm length require time, can Lengthened moment arm, and counterweight meets force request in addition.
(4) in deep foundation ditch tool-type hanging stair of the present invention, stair mainly exist with the form of standard knot, during processing and fabricating, are convenient to the accuracy guaranteeing size and bolt hole position.In field-mounted process, do not need workman's capable more thinking or creative change again, guarantee smoothness is installed, time saving and energy saving, thus raising popularity rate.
(5) deep foundation ditch tool-type hanging stair of the present invention can provide safety with convenient for constructor is current, have the advantages such as dismounting speed is fast, turnover rate is high, security performance is good.
Accompanying drawing explanation
Fig. 1 is mounted in the ladder bearing plan view of foundation ditch deep foundation ditch tool-type hanging stair on one side.
Fig. 2 is the sectional schematic diagram of Fig. 1.
Fig. 3 is mounted in the ladder bearing plan view that foundation ditch delivers the deep foundation ditch tool-type hanging stair at place.
Fig. 4 is the sectional schematic diagram of Fig. 3.
Fig. 5 is pre-embedded bolt and pre-embedded steel slab annexation figure.
Fig. 6 be girder steel with space enclosing structure Guan Liang be fixedly connected with graph of a relation.
Fig. 7 is the annexation figure of stair and half space.
Fig. 8 is the plan view of half space.
Fig. 9 is the sectional schematic diagram of Fig. 8.
Figure 10 is the annexation figure of half space and column.
Figure 11 is the front elevation view of stair.
Figure 12 is the lateral view of Figure 11.
Description of reference numerals: 1, column; 2, girder steel; 3, space enclosing structure Guan Liang; 4, half space; 5, lateral connection bar; 6, horizontal diagonal brace; 7, to put more energy into floor; 8, junction plate; 9, reinforcing bar or small size shaped steel; 10, pre-embedded bolt; 11, pre-embedded steel slab; 12, backing plate; 13, grouting material; 14, junction plate; 15, step plate; 16, step plate gripper shoe; 17, guard rail; 18, frame; 19, supporting part; 20, landing slab; 21, transition member; 22, bearing diagonal; 23, protection canopy; 24, interim packway.
Detailed description of the invention
Along with the continuous propelling of green construction, safety construction, implement country about the development strategy strengthening energy-saving and emission-reduction, Resources for construction energy-efficient society, friendly environment society, makes safety device standardization formula, tool-type is the effective way realizing Sustainable Construction Industry.Particularly the paces of current subway construction and Urban Underground Space Excavation are constantly accelerated, and deep-foundation pit engineering brings that security issues become increasingly urgent.The existing security performance being applicable to the walkway of deep-foundation pit engineering is low, and disassembly process is loaded down with trivial details, and recycling rate of waterused is lower, does not especially meet with the sequence of construction of base pit engineering.
The present invention, for solving the problem, adapts to standardization formula, the tool-type demand for development of construction safety protection device, provides a kind of deep foundation ditch tool-type and hang stair.Deep foundation ditch tool-type hangs the structure of stair as shown in Figure 1, Figure 2, Figure 3 and Figure 4, comprises ladder, ladder bearing and stair.Wherein, ladder is arranged in foundation ditch, plays a supportive role to the stair passed through for constructor; Ladder bearing is fixedly connected with foundation ditch, for supporting and fixing ladder; Stair are installed on ladder inner space, convenient construction personnel can pass in and out foundation ditch.Further, as is illustrated by figs. 11 and 12, above described ladder bearing, protection canopy 23 is installed.
Specifically, described ladder is made up of two groups of ladder unit, leaves the gap of installing stair between two groups of ladder unit.Often organize ladder unit and comprise 4 columns 1, the cross section of ladder unit is rectangular, and the upper end of column 1 is fixedly connected with the girder steel 2 above it is vertical, and foundation ditch bottom surface is vertically stretched in the lower end of column 1.Preferred as embodiment, 4 columns 1 can be 4 identical columns 1, and column 1 can select square steel.The material needs of described girder steel 2 are selected according to the installation site of girder steel 2 and mode, can select i iron, also can select H profile steel.
Described ladder bearing is fixedly connected with foundation pit enclosure structure, and ladder bearing stretches to the upper space of foundation ditch.According to the construction needs of base pit engineering, ladder bearing can be arranged on the same of foundation ditch or be arranged on the corner of foundation ditch.Ladder bearing comprises 2 or 4 girder steels 2, and the one or both ends of girder steel 2 are fixed on the upper surface of space enclosing structure hat beam 3.
If ladder bearing is arranged on the edge of foundation ditch, as depicted in figs. 1 and 2, deep foundation ditch tool-type hanging stair of the present invention adopt overhanging type to install.Preferred as embodiment, described ladder bearing comprises 4 identical girder steels 2 and is arranged on foundation ditch on one side, girder steel 2 is arranged in parallel and be all preced with beam 3 with the space enclosing structure of foundation ditch mutually vertical, the upper surface that one end of girder steel 2 and space enclosing structure are preced with beam 3 is by bolt be welded and fixed, and the free end of 4 girder steels 2 is positioned at the top of foundation ditch.Especially, the free end of 4 girder steels 2 is on same straight line, and the space enclosing structure that this straight line is fixedly connected with girder steel 2 is preced with beam 3 and is parallel to each other.In such cases, girder steel 2 can select i iron, and the installing space be between the girder steel 2 of both sides and its adjacent girder steel 2 can be 900mm, and the installing space between two girder steels 2 at middle part can be 2170mm.
Further, described ladder bearing also comprises lateral connection bar 5, horizontal diagonal brace 6 and floor 7 of putting more energy into.For strengthening the globality of whole ladder bearing, the upper surface of girder steel 2 is provided with lateral connection bar 5.Preferred as embodiment, the lateral connection bar 5 be arranged on girder steel 2 can have 3, and lateral connection bar 5 can select angle steel.3 lateral connection bars 5 are arranged in parallel in the horizontal direction and mutually vertical with girder steel 2, and wherein, 2 lateral connection bars 5 are arranged on the top of girder steel 2 and column 1 link position, and another lateral connection bar 5 is arranged on the top of space enclosing structure hat beam 3.Lateral connection bar 5 and girder steel 2 are bolted to connection.As further preferred, the installing space be between lateral connection bar 5 above girder steel 2 and column 1 link position and the lateral connection bar 5 mediated can be 2130mm, and the lateral connection bar 5 mediated and the installing space be arranged between lateral connection bar 5 that space enclosing structure is preced with above beam 3 can be 1550mm.
In order to improve safety factor, increase the constraint to the stair of encorbelmenting, the described side at outside girder steel arranges horizontal diagonal brace 6, one end of horizontal diagonal brace 6 is preced with beam 3 by the pre-embedded bolt 10 being embedded in space enclosing structure hat beam 3 with space enclosing structure and is fixedly connected with, the other end of horizontal diagonal brace 6 is connected with a plate 8 bolt, and junction plate 8 welds with girder steel 2.In addition, also arrange bearing diagonal 22 in the below of girder steel 2, preferred as embodiment, the below of each girder steel 2 can arrange a bearing diagonal 22.One end of bearing diagonal 22 is fixedly connected with the medial surface (one side towards foundation ditch) that space enclosing structure is preced with beam 3 by pre-embedded bolt 10; The other end of bearing diagonal 22 is connected with girder steel 2 by a backing plate 12, and bearing diagonal 22 is connected with backing plate 12 bolt, and backing plate 12 welds with girder steel 2.It should be noted that, the object arranging backing plate 12 between bearing diagonal 22 and girder steel 2 guarantees that the connection between bearing diagonal 22 and girder steel 2 is more firm.Preferred as embodiment, the angle that bearing diagonal 22 and space enclosing structure are preced with the medial surface of beam 3 is 45 degree, and the angle between bearing diagonal 22 and girder steel 2 is also 45 degree, and bearing diagonal 22 can select square steel.In addition, the Main Load being deep foundation ditch tool-type of the present invention hanging stair due to girder steel 2 builds, and in order to strengthen the rigidity of section of girder steel 2 stress point, welds at the free end of girder steel 2 floor 7 of putting more energy into.
If ladder bearing is arranged on the corner of foundation ditch, shown in Fig. 3 and Fig. 4, deep foundation ditch tool-type hanging stair of the present invention adopt simply-support to install.Preferred as embodiment, described ladder bearing comprises 2 girder steels 2 and is arranged on the rotation angle position of foundation ditch, 2 girder steels 2 be arranged in parallel, and girder steel 2 is 45 degree with the angle on the corner limit of foundation ditch, the two ends of each girder steel 2 upper surface of being all preced with beam 3 with space enclosing structure by bolt be welded and fixed.In such cases, girder steel 2 can select H profile steel, and a girder steel 2 near foundation ditch corner is shorter.Installing space between 2 girder steels can be 2280mm, and the width of each ladder unit is 900mm, and the installing space of adjacent two ladder unit can be 2170mm.
In order to strengthen the resistance to overturning between adjacent 2 girder steels, improve safety factor simultaneously, as preferably, two groups of cross one another reinforcing bars or small size shaped steel 9 is welded between described 2 girder steels 2, reinforcing bar or small size shaped steel 9 are arranged on the outside of ladder unit, and namely reinforcing bar or small size shaped steel 9 are between the corner limit of ladder unit and foundation ditch.In addition, also arrange bearing diagonal 22 in the below of girder steel 2, preferred as embodiment, the below of each girder steel 2 can arrange a bearing diagonal 22.One end of bearing diagonal 22 is fixedly connected with the medial surface (one side towards foundation ditch) that space enclosing structure is preced with beam 3 by pre-embedded bolt 10; The other end of bearing diagonal 22 is connected with girder steel 2 by a backing plate 12, and bearing diagonal 22 is connected with backing plate 12 bolt, and backing plate 12 welds with girder steel 2.It should be noted that, the object arranging backing plate 12 between bearing diagonal 22 and girder steel 2 guarantees that the connection between bearing diagonal 22 and girder steel 2 is more firm.Preferred as embodiment, the angle that bearing diagonal 22 and space enclosing structure are preced with the medial surface of beam 3 is 45 degree, and the angle between bearing diagonal 22 and girder steel 2 is also 45 degree, and bearing diagonal 22 can select square steel.
It should be noted that, no matter which kind of mounting means deep foundation ditch tool-type hanging stair adopt, and be preced with beam 3 be connected to fastness to improve girder steel 2 and space enclosing structure, and girder steel 2 and space enclosing structure are preced with not only to be had bolt to be connected between beam 3 to additionally use welding.For reaching this purpose, as shown in Figure 5 and Figure 6, the inside of described space enclosing structure hat beam 3 is provided with pre-embedded bolt 10 and pre-embedded steel slab 11, and the base portion of pre-embedded bolt 10 is arranged on the top of pre-embedded steel slab 11 and is connected by plug welding.As technical solution of the present invention further preferably, in order to increase the lifting surface area of girder steel 2 fulcrum location, guarantee the uniform force of girder steel 2 on space enclosing structure hat beam 3 surface, the junction that girder steel 2 and space enclosing structure are preced with beam 3 is also provided with backing plate 12, pre-embedded bolt 10 is connected with girder steel 2 by backing plate 12, the upper surface of backing plate 12 and girder steel 2 solder design, be filled with grouting material 13 in the gap between the upper surface that the soffit of backing plate 12 and space enclosing structure are preced with beam 3.
In order to improve the fixing be connected between column 1 with girder steel 2 further, on the basis that column 1 and girder steel 2 are bolted to connection, junction plate 14 is provided with between column 1 and girder steel 2, bolt connects column 1 and girder steel 2 through junction plate 14, the upper surface of junction plate 14 and girder steel 2 solder design.
Further, described stair are arranged in the space between two groups of ladder unit from top to bottom successively, and the corner between adjacent stair arranges half space 4, and half space 4 is fixed on the inner space of ladder unit.Specifically, as shown in Figure 7, described stair comprise step plate 15, step plate gripper shoe 16 and guard rail 17, wherein, step plate 15 is welded in step plate gripper shoe 16, and the end of step plate gripper shoe 16 is welded with column 1, and guard rail 17 is arranged on step plate 15 both sides.Especially, described guard rail 17 is provided with closed metal net, to improve constructor by security performance during stair.Preferred as embodiment, guard rail 17 can select square steel to be welded; Step plate gripper shoe 16 can be C-type steel, and the specification of selecting of C-type steel is height 160mm, middle leg length of side 60mm; Can also arrange a 20mm steel plate as transition member 21 at step plate 15 and the junction of half space 4, the side of steel plate welds with column 1; Step plate 15 can be the thick checkered steel plate of 3mm.
In deep foundation ditch tool-type hanging stair of the present invention, stair mainly exist with the form of standard knot, during processing and fabricating, are convenient to the accuracy guaranteeing size and bolt hole position.In field-mounted process, do not need workman's capable more thinking or creative change again, guarantee smoothness is installed, time saving and energy saving, thus raising popularity rate.
In deep foundation ditch tool-type hanging stair of the present invention, as shown in Figure 8 and Figure 9, half space 4 comprises frame 18, several supporting parts 19 and landing slab 20.Wherein, the corner of frame 18 is connected with the column 1 forming ladder unit, and supporting part 19 is welded on the inside of frame 18 in parallel, and landing slab 20 is laid in the plane at frame 18 and supporting part 19 place.The side of described half space 4 arranges guard rail 17, guard rail 17 is provided with closed metal net.Preferred as embodiment, frame 18 is made up of channel-section steel, and the width of frame 18 is 1000mm, and the length of frame 18 is 2130mm; This half space 4 comprises 5 supporting parts 19, and supporting part 19 equidistantly be arranged in parallel along the width of frame 18, and supporting part 19 is made up of angle steel; Landing slab 20 is the thick checkered steel plate of 3mm, and one has 6 pieces, is laid on successively in the plane at frame 18 and supporting part 19 place.
As technical solution of the present invention further preferably, as shown in Figure 10, the corner of described half space 4 is fixedly connected with column 1 by channel-section steel, the waist height portion of channel-section steel welds with column 1, the upper leg wide portion upper surface of channel-section steel installs half space 4, the wide portion of lower leg of channel-section steel is connected with one side bolt of the angle bar be arranged on below channel-section steel, and the another side of angle bar welds with column 1.
It should be noted that, when space enclosing structure hat beam 3 cross sectional dimensions of foundation ditch be difficult to meet girder steel 2 torque arm length require time, can Lengthened moment arm, and in addition counterweight meets force request.
As can be seen from the above, the maximum feature of deep foundation ditch stair of the present invention is suspension types, and the actual conditions according to construction install staircase component from top to bottom.In Main Underground body structure construction process, can select to dismantle staircase component from the bottom to top; As is illustrated by figs. 11 and 12, distance for stair distance from bottom foundation ditch bottom surface is less than the part of staircase component height, design of coupler scaffold pipe can be used to set up interim packway 24 as a supplement, fully can meet the current demand of deep-foundation pit engineering different construction stage.Therefore, the present invention can completely and pit earthwork excavates, slope retaining and subsequent structural working procedure are combined closely, can directly apply in open cut underground space engineering, subway engineering or other underground engineering construction work progress, be particularly useful for cutting depth 10 ~ 30m deep foundation ditch.
Below for an actual construction example.
For Wu Ke Song underground parking garage engineering, the detailed description of the invention of deep foundation ditch tool-type hanging steel stair is described.Detailed description of the invention is mainly reflected in installation, use, dismounting three aspects.
Wu Ke Song underground parking garage is typically descend space item, and agent structure is F3/B3 reinforced concrete frame structure, and the long 252m of garage parking foundation ditch East and West direction, the long 287m in north-south, buried depth of basement is about 21.45m, and foundation ditch is larger.
Limit by surrounding enviroment and site condition, excavation of foundation pit, supporting only can carry out from south to north, and the motor vehicle packway that is unearthed is arranged on foundation ditch north side; On-site working and la vie ouvriere district are arranged in foundation ditch southern side and west side, for guaranteeing that the upper and lower deep pit monitor of constructor meets construction organization demand simultaneously, install 3 steel stairs according to construction progress in advance in foundation ditch southern side, the later stage follows the earthwork and terminates in foundation ditch north side and install 2 steel stairs.
List portion steel stair installation procedure is all identical: early stage is prepared (setting position and stair suspending way); Consigned processing (first processes built-in fitting; Installation of embedded parts; Girder steel 2 is installed (first stair, platform and the head protector canopy of running is set up); With pit earthwork excavation construction, cycle installation stair standard knot (containing packway interim bottom stair) from top to bottom; Excavation of foundation pit is to substrate, and with main structure construction, stair standard knot is removed in circulation from bottom to top; Staircase component turnover uses; Remove stair superstructure and girder steel 2.
Further describe invention has been above, but the present invention is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, can also make a variety of changes under the prerequisite not departing from present inventive concept in conjunction with the embodiments.
Claims (10)
1. a deep foundation ditch tool-type hangs stair, comprise the ladder be arranged in foundation ditch, support the ladder bearing of ladder and be arranged on the stair of ladder inner space, it is characterized in that, described ladder bearing is fixedly connected with foundation pit enclosure structure, ladder bearing comprises 2 or 4 girder steels, and the one or both ends of girder steel are fixed on the upper surface of space enclosing structure Guan Liang; Described ladder is made up of two groups of ladder unit, be provided with the gap of installing stair between two groups of ladder unit, often organize ladder unit and comprise 4 columns, the cross section of ladder unit is rectangular, the upper end of column is fixedly connected with the girder steel above it is vertical, and foundation ditch bottom surface is vertically stretched in the lower end of column; Described stair are arranged in the space between two groups of ladder unit from top to bottom successively, and the corner between adjacent stair arranges half space, and half space is fixed on the inner space of ladder unit.
2. deep foundation ditch tool-type according to claim 1 hangs stair, it is characterized in that, described ladder bearing comprises 4 identical girder steels and is arranged on foundation ditch on one side, girder steel is arranged in parallel and all mutually vertical with the space enclosing structure Guan Liang of foundation ditch, one end of girder steel and the upper surface of space enclosing structure Guan Liang are by bolt and be welded and fixed, and the free end of 4 girder steels is positioned at the top of foundation ditch; The upper surface of described girder steel arranges several lateral connection bars, and lateral connection bar be arranged in parallel and mutually vertical with girder steel in the horizontal direction, and lateral connection bar and girder steel are bolted to connection.
3. deep foundation ditch tool-type according to claim 2 hangs stair, it is characterized in that, described ladder bearing also comprises horizontal diagonal brace, bearing diagonal and floor of putting more energy into; Described horizontal diagonal brace is arranged on the side of outside girder steel, and one end of horizontal diagonal brace is fixedly connected with space enclosing structure Guan Liang by the pre-embedded bolt being embedded in space enclosing structure Guan Liang, and the other end of horizontal diagonal brace is connected with a plate bolt, and junction plate welds with girder steel; Described bearing diagonal is arranged on the below of girder steel, and one end of bearing diagonal is fixedly connected with space enclosing structure Guan Liang by the pre-embedded bolt being embedded in space enclosing structure hat beam sides, and the other end of bearing diagonal is connected with girder steel bolt by a backing plate, and backing plate welds with girder steel; Described floor of putting more energy into is welded on the free end of girder steel.
4. deep foundation ditch tool-type according to claim 1 hangs stair, it is characterized in that, described ladder bearing comprises 2 girder steels and is arranged on the rotation angle position of foundation ditch, girder steel is arranged in parallel, the angle on the corner limit of girder steel and foundation ditch is 45 degree, the two ends of each girder steel all with the upper surface of space enclosing structure Guan Liang by bolt be welded and fixed; Weld 2 groups of cross one another reinforcing bars or small size shaped steel between described 2 girder steels, reinforcing bar or small size shaped steel are arranged on the outside of ladder unit.
5. deep foundation ditch tool-type according to claim 4 hangs stair, it is characterized in that, described ladder bearing also comprises bearing diagonal; Described bearing diagonal is arranged on the below of girder steel, and one end of bearing diagonal is fixedly connected with space enclosing structure Guan Liang by the pre-embedded bolt being embedded in space enclosing structure hat beam sides, and the other end of bearing diagonal is connected with girder steel bolt by a backing plate, and backing plate welds with girder steel.
6. the deep foundation ditch tool-type according to claim 2 or 4 hangs stair, it is characterized in that, the junction of described girder steel and space enclosing structure Guan Liang is provided with backing plate, pre-embedded bolt in space enclosing structure hat beam is connected with girder steel by backing plate, the upper surface of backing plate and girder steel solder design, be filled with grouting material in the gap between the soffit of backing plate and the upper surface of space enclosing structure Guan Liang.
7. deep foundation ditch tool-type according to claim 1 hangs stair, it is characterized in that, described column and girder steel are bolted to connection, between column and girder steel, be provided with junction plate, bolt connects column and girder steel through junction plate, the upper surface of junction plate and girder steel solder design.
8. deep foundation ditch tool-type according to claim 1 hangs stair, it is characterized in that, described stair comprise step plate, step plate gripper shoe and are arranged on the guard rail of step plate both sides, step plate is welded in step plate gripper shoe, the end of step plate gripper shoe is welded with column, described guard rail is provided with closed metal net.
9. deep foundation ditch tool-type according to claim 1 hangs stair, it is characterized in that, described half space comprises frame, several supporting parts and landing slab, the corner of described frame is connected with the column forming ladder unit, supporting part is welded on the inside of frame in parallel, and landing slab is laid in the plane at frame and supporting part place; The side of described half space arranges guard rail, guard rail is provided with closed metal net.
10. deep foundation ditch tool-type according to claim 9 hangs stair, it is characterized in that, the corner of described half space is fixedly connected with column by channel-section steel, the waist height portion of channel-section steel welds with column, the upper leg wide portion upper surface of channel-section steel installs half space, the wide portion of lower leg of channel-section steel is connected with one side bolt of the angle bar be arranged on below channel-section steel, and the another side of angle bar welds with column.
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| CN201410490893.2A CN104234447B (en) | 2014-09-24 | 2014-09-24 | Deep foundation ditch tool-type hangs stair |
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| CN201410490893.2A CN104234447B (en) | 2014-09-24 | 2014-09-24 | Deep foundation ditch tool-type hangs stair |
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| CN104234447A true CN104234447A (en) | 2014-12-24 |
| CN104234447B CN104234447B (en) | 2016-02-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869421A (en) * | 2017-01-10 | 2017-06-20 | 中国建筑第八工程局有限公司 | Assembled stairs structure and its installation method |
| CN109958133A (en) * | 2018-11-20 | 2019-07-02 | 成都中技智慧企业管理咨询有限公司 | A kind of adjusting method at the deep basal pit stair activity suspension angle based on safety |
| CN112727152A (en) * | 2020-12-28 | 2021-04-30 | 咸宁智锐机电科技有限公司 | Connection structure between construction stair and floor in deep basal pit |
| CN112922029A (en) * | 2021-03-18 | 2021-06-08 | 中铁隧道局集团有限公司 | Shaft-up and shaft-down channel for constructing ultra-deep shaft by reverse construction method and building method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0921238A (en) * | 1995-07-04 | 1997-01-21 | Shuji Takase | Entrance structure in building construction site |
| CN101067300A (en) * | 2007-06-01 | 2007-11-07 | 天津一建建筑工程有限公司 | Deep foundation pits rampway structure |
| DE102009024857A1 (en) * | 2009-06-09 | 2010-12-16 | Rux Gmbh | Stair stringer for stair towers utilized as e.g. emergency stairs during renovation work on public buildings, has retainers arranged in step form, and supporting units, which are independent of height of points and distance of supports |
| CN202215006U (en) * | 2011-09-07 | 2012-05-09 | 中国建筑土木建设有限公司路桥分公司 | Tool-type fixed ladder for construction |
| CN203755717U (en) * | 2014-02-28 | 2014-08-06 | 中国建筑第五工程局有限公司广州分公司 | Assembly type up and down pedestrian path for deep foundation pit |
-
2014
- 2014-09-24 CN CN201410490893.2A patent/CN104234447B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0921238A (en) * | 1995-07-04 | 1997-01-21 | Shuji Takase | Entrance structure in building construction site |
| CN101067300A (en) * | 2007-06-01 | 2007-11-07 | 天津一建建筑工程有限公司 | Deep foundation pits rampway structure |
| DE102009024857A1 (en) * | 2009-06-09 | 2010-12-16 | Rux Gmbh | Stair stringer for stair towers utilized as e.g. emergency stairs during renovation work on public buildings, has retainers arranged in step form, and supporting units, which are independent of height of points and distance of supports |
| CN202215006U (en) * | 2011-09-07 | 2012-05-09 | 中国建筑土木建设有限公司路桥分公司 | Tool-type fixed ladder for construction |
| CN203755717U (en) * | 2014-02-28 | 2014-08-06 | 中国建筑第五工程局有限公司广州分公司 | Assembly type up and down pedestrian path for deep foundation pit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869421A (en) * | 2017-01-10 | 2017-06-20 | 中国建筑第八工程局有限公司 | Assembled stairs structure and its installation method |
| CN109958133A (en) * | 2018-11-20 | 2019-07-02 | 成都中技智慧企业管理咨询有限公司 | A kind of adjusting method at the deep basal pit stair activity suspension angle based on safety |
| CN112727152A (en) * | 2020-12-28 | 2021-04-30 | 咸宁智锐机电科技有限公司 | Connection structure between construction stair and floor in deep basal pit |
| CN112727152B (en) * | 2020-12-28 | 2022-06-03 | 宜昌富海建设工程有限公司 | Connection structure between construction stair and floor in deep basal pit |
| CN112922029A (en) * | 2021-03-18 | 2021-06-08 | 中铁隧道局集团有限公司 | Shaft-up and shaft-down channel for constructing ultra-deep shaft by reverse construction method and building method thereof |
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|---|---|
| CN104234447B (en) | 2016-02-24 |
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