CN111764399A - Wall protection reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering and construction method thereof - Google Patents
Wall protection reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering and construction method thereof Download PDFInfo
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- CN111764399A CN111764399A CN202010525118.1A CN202010525118A CN111764399A CN 111764399 A CN111764399 A CN 111764399A CN 202010525118 A CN202010525118 A CN 202010525118A CN 111764399 A CN111764399 A CN 111764399A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
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Abstract
The invention relates to the field of construction of pipe gallery foundation pit slope protection engineering, in particular to a retaining wall reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering and a construction method thereof, wherein the retaining wall reinforcing steel bar comprises the following components: the transverse positioning steel bars and the inter-pile soil are horizontally and fixedly arranged on the inter-pile soil at equal intervals along the axial direction through fastening steel bars; the transverse positioning steel bars and the longitudinal positioning steel bars are fixedly connected with the inter-pile soil through the fastening steel bars at equal intervals in the axial direction; reinforcing bar net piece, including vertical horizontal reinforcing bar and horizontal reinforcing bar, vertical horizontal reinforcing bar and horizontal reinforcing bar vertically and horizontally staggered set up in the rigid muscle outside of vertical location, and vertical horizontal reinforcing bar and horizontal reinforcing bar intersect carry out the ligature, and reinforcing bar net piece intersect passes through the fixed setting of fastening dowel steel on the soil between the stake, and the protruding or hollowing of reinforcing bar net piece can be avoided to this dado reinforcing bar.
Description
Technical Field
The invention relates to the field of construction of pipe gallery foundation pit slope protection engineering, in particular to a retaining wall reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering and a construction method thereof.
Background
The foundation pit support is a retaining, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit. The foundation pit supporting engineering is a temporary engineering, and the designed safety reserve can be relatively small, but is related to the locality. The geological conditions in different regions are different in characteristics. The foundation pit supporting engineering is a subject of mutual intersection of geotechnical engineering, structural engineering and construction technology, is a system engineering of interactive influence of various complex factors, and is a comprehensive technical subject yet to be developed theoretically. The foundation pit supporting construction is high in construction cost and large in operation quantity, is the key point of competition of construction units, is the most challenging technical difficulty in construction engineering due to the complex technology, wide in related range, multiple in variation factors and frequent in accidents, and is the key point of reducing the construction cost and ensuring the engineering quality.
The pile foundation dado steel bar structure, general pile foundation dado is that the higher authority of each section is little (standard size), and the lower side is big (standard size adds dado thickness), and two sections dado junctions are having a step. On the premise of ensuring the structural requirements and the basic size and shape, the protective layer is usually configured at a distance of 150-300. The pile foundation dado has the effect of obtaining a good effect by adopting the mud dado aiming at the problem that hole collapse is caused by loose stratum and overlong self-standing time of the hole wall before underwater concrete is poured when a special drilling pile forms a hole.
Only adopted the dowel bar in the fixed construction of the soil dado reinforcing bar between traditional piping lane foundation ditch bank protection engineering stake to consolidate it, the reinforcing bar net piece easily forms arch and hollowing between the anchor rod, when the shotcrete, it is extravagant to remove to cause a large amount of concrete at reinforcing bar net piece arch, and before the concrete is not totally hardened yet, the protruding position is because gathered a large amount of concrete and caused the concrete collectively to drop easily, there is very big potential safety hazard, and the interval of reinforcing bar net piece is not well controlled, need a large amount of manual works to adjust the maintenance.
Chinese patent CN201220663467.0 discloses a dado steel bar connection structure of bored pile, including the dado, be equipped with at least one steel bar connection chain in the dado perpendicularly, the level is equipped with at least round steel bar hoop in the dado, steel bar hoop with steel bar connection chain fixed connection forms the reinforcing bar net, its characterized in that: the steel bar connecting chain is formed by connecting at least 2 hook steel bars end to end through hooks.
The time interval for setting the reinforcing mesh is not easy to control and hollowing is easy to occur during pouring, so that the invention is necessary to invent the retaining wall reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering and the construction method thereof.
Disclosure of Invention
The invention aims to solve the technical problem of providing a retaining wall reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering and a construction method thereof, so that the problems that the distance between reinforcing steel bars is uneven, material waste is caused by hollowing, potential safety hazards exist and the like easily occur to soil retaining wall reinforcing steel bar meshes between piles of the pipe gallery foundation pit slope protection engineering are solved.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a dado reinforcing bar of underground pipe gallery foundation ditch bank protection engineering, including: the axial lines of the transverse positioning rigid bars and the inter-pile soil are horizontally and fixedly arranged on the inter-pile soil at equal intervals along the axial direction through fastening steel bars; the transverse positioning steel bars and the longitudinal positioning steel bars are fixedly connected with the soil between the piles by the fastening steel bars at equal intervals in the axial direction; the reinforcing mesh comprises longitudinal horizontal reinforcing steel bars and transverse horizontal reinforcing steel bars, wherein the longitudinal horizontal reinforcing steel bars and the transverse horizontal reinforcing steel bars are arranged on the outer sides of longitudinal positioning steel bars in a criss-cross mode, binding operation is carried out on cross points of the longitudinal horizontal reinforcing steel bars and the transverse horizontal reinforcing steel bars, and the cross points of the reinforcing mesh are fixedly arranged on soil between piles through fastening inserted bars.
Preferably, the transverse positioning steel bar and the fastening steel bar are C14 grade steel bars.
Preferably, still including connecting the joint post, connect the joint post along the rigid muscle of horizontal positioning and the rigid muscle of vertical positioning radially set up on its periphery, connect the joint post along the axial towards the outside, connect joint post periphery along the axial equidistant joint groove that is provided with vertical horizontal reinforcing bar and horizontal reinforcing bar joint.
Preferably, the fastening bead comprises: a threaded post; clamping the fixing piece; the threaded column and the rotating piece are respectively and coaxially arranged at the fixed end of the bottom of the rotating piece and the rotating end of the top of the rotating piece; under the operating condition, the screw thread post is vertically screwed in the soil between the piles, and the clamping fixing piece is clamped with the transverse positioning rigid rib and the longitudinal positioning rigid rib, the longitudinal horizontal reinforcing steel bar and the cross point of the transverse horizontal reinforcing steel bar.
Preferably, the threaded post base spigot end is pointed.
Preferably, the rotating member includes: the fixed sleeve is coaxially arranged at the top end of the threaded column; the rotating column is coaxially and rotatably arranged inside the fixed sleeve and is coaxially and fixedly connected with the bottom end of the clamping fixing piece; the limiting ring is coaxially arranged at the top end of the rotating column in the fixed sleeve and is rotationally connected with the fixed sleeve.
Preferably, the outer circumferential surface of the fixing sleeve is provided with square wing plates along the radial direction in an inclined manner.
Preferably, the snap fastener comprises: the straight rod part of the hook-shaped column is coaxially arranged at the top end of the rotating column; the elastic strip is obliquely arranged at the top end of the straight rod part of the hook-shaped column through the fixing ring along the radial direction and elastically abuts against the inner side of the hook part of the hook-shaped column.
Preferably, still including the spill spacing collar, the coaxial equidistant setting of spill spacing collar is on the rigid muscle of contact location with the reinforcing bar net piece, spill spacing collar notch and reinforcing bar net piece contact outer periphery joint.
A retaining wall reinforcing steel bar of underground pipe gallery foundation pit slope protection engineering and a construction method thereof comprise the following steps: firstly, after C14-grade steel bars for processing positioning steel bars are prepared in advance, transverse positioning steel bars, longitudinal positioning steel bars and fastening steel bars are processed according to the size and the dimension which are designed in advance, and preparation is made for subsequent work;
secondly, marking in the inter-pile soil of the pile protection slope by using on-site elevation control points, horizontally fixing the transverse positioning rigid ribs on the inter-pile soil by using fastening steel bars, fixing the longitudinal positioning rigid ribs on the inter-pile soil by using the fastening steel bars, and additionally arranging fastening steel bars fixedly connected with the inter-pile soil at the crossed nodes of the transverse positioning rigid ribs and the longitudinal positioning rigid ribs;
step three: the method comprises the steps that the position of a concave limiting ring on an outer side positioning steel bar is adjusted in advance, then a steel bar net piece is fixed on the outer side positioning steel bar, so that a longitudinal horizontal steel bar and a transverse horizontal steel bar are respectively embedded with a connecting clamping column and a concave limiting ring groove part, then binding operation is carried out on the crossed point of the steel bar net piece, and the steel bar net piece is used for hooking the crossed node of the steel bar net piece to be fixed on soil between piles according to a design principle;
step four: and after the binding and fixing of the reinforcement mesh sheets on the soil between the piles are finished, checking and accepting, and performing concrete spraying operation on the spraying slope surface after the checking and accepting are qualified.
Compared with the prior art, the invention has the beneficial effects that:
the slope protection pile is a pile which is driven along the side of the foundation pit and prevents the collapse of the side slope, and is usually a measure adopted under the condition that the effective width working surface of the side slope is insufficient; the inter-pile soil refers to artificial earthwork between the elevation of the designed pile top and the elevation of the designed foundation cushion bottom; after C14-grade steel bars for processing the positioning steel bars are prepared in advance, transverse positioning steel bars, longitudinal positioning steel bars and fastening steel bars are processed according to the size and the dimension which are designed in advance, and preparation is made for subsequent work;
marking in the inter-pile soil of the pile protection slope by using an on-site elevation control point, horizontally fixing the transverse positioning rigid bars on the inter-pile soil by using fastening inserted bars, fixing the longitudinal positioning rigid bars on the inter-pile soil by using the fastening inserted bars, and additionally arranging fastening inserted bars fixedly connected with the inter-pile soil at the crossed nodes of the transverse positioning rigid bars and the longitudinal positioning rigid bars; namely, during working, the transverse positioning steel bars are horizontally and fixedly arranged on soil between piles through the fastening steel bars, the longitudinal positioning steel bars and the axes of the transverse positioning steel bars are vertically and horizontally and fixedly arranged on the soil between piles through the fastening steel bars, so that the transverse positioning steel bars and the longitudinal positioning steel bars are crossed to form transverse and longitudinal positioning bars, a steel bar net piece is convenient to install, no protrusion and hollowing are easy to occur during pouring, the crossed joints of the transverse and longitudinal positioning bars are fixedly connected with the soil between piles through the fastening steel bars, the positioning planes of the transverse and longitudinal positioning bars are horizontal to the soil surface between piles, and the steel bar net piece is convenient to fixedly install;
after the transverse and longitudinal positioning ribs are arranged, the reinforcing mesh needs to be tiled and arranged on the transverse and longitudinal positioning ribs, namely, the longitudinal horizontal reinforcing bars and the transverse horizontal reinforcing bars are arranged on the outer sides of the longitudinal positioning rigid ribs in a criss-cross mode, then, binding operation is carried out on the cross points of the longitudinal horizontal reinforcing bars and the transverse horizontal reinforcing bars manually, so that the longitudinal horizontal reinforcing bars and the transverse horizontal reinforcing bars are prevented from being loosened during pouring, after binding is finished, the reinforcing mesh is fixed on the transverse and longitudinal positioning ribs by inserting and fastening inserted bars on soil between piles, the transverse and longitudinal positioning ribs are convenient to position the reinforcing mesh, the distance between the longitudinal horizontal reinforcing bars and the transverse horizontal reinforcing bars is uniform, the bulges and the hollows of the reinforcing mesh can be reduced, and the potential safety hazards existing in a construction site are reduced while the material;
and after binding of the soil reinforcing steel bars between the piles is finished, checking and accepting, and performing concrete spraying operation on the spraying slope surface after the checking and accepting are qualified.
1. The space between the soil retaining wall reinforcing steel bars among the foundation pit slope protection engineering piles of the underground municipal comprehensive pipe gallery is uniform, and the finished product effect is good;
2. the inter-pile soil protection wall reinforcing steel bars of the foundation pit slope protection engineering of the underground municipal comprehensive pipe gallery are not easy to bulge or hollowly bulge reinforcing mesh sheets, so that potential safety hazards existing in a construction site are reduced while material waste is reduced;
3. unnecessary reworking links are reduced, the progress is accelerated, and the cost is saved.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an assembled perspective view of the spacer bar of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a side view of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a perspective view of a concave spacing collar of the present invention;
FIG. 7 is a perspective view of the plug of the present invention;
FIG. 8 is a side view of a tendon of the present invention;
FIG. 9 is a cross-sectional view at section B-B of FIG. 8;
fig. 10 is a partial enlarged view of fig. 9 at C.
The reference numbers in the figures are:
1. transversely positioning the steel bars;
2. longitudinally positioning the steel bars;
3. reinforcing mesh sheets; 3a, longitudinal horizontal steel bars; 3b, transverse horizontal steel bars;
4. fastening the inserted bars; 4a, a threaded column; 4a1, pointed; 4b, a rotating member; 4b1, fixed sleeve; 4b2, a spacing collar; 4b3, rotating column; 4b4, square wing plate; 4c, clamping the fixing piece; 4c1, hook post; 4c2, retainer ring; 4c3, elastic strips;
5. connecting the clamping columns; 5a, a clamping groove;
6. concave spacing collar.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 to 10, the retaining wall reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering comprises:
the transverse positioning steel bars 1 are arranged on the soil between the piles in an axial and equidistant manner, and the axial lines of the transverse positioning steel bars 1 and the soil between the piles are horizontally fixed on the soil between the piles in an axial and equidistant manner through fastening steel bars 4;
the transverse positioning steel bars 1 and the longitudinal positioning steel bars 2 are crossed and fixedly connected with the inter-pile soil through fastening steel bars 4;
reinforcing bar net piece 3, including vertical horizontal reinforcing bar 3a and horizontal reinforcing bar 3b, vertical horizontal reinforcing bar 3a and horizontal reinforcing bar 3b vertically and horizontally staggered set up in the rigid muscle 2 outsides of vertical location, vertical horizontal reinforcing bar 3a and horizontal reinforcing bar 3b intersect carry out the ligature operation, reinforcing bar net piece 3 intersect is fixed to be set up on the soil between the stake through fastening dowel steel 4.
The slope protection pile is a pile which is driven along the side of the foundation pit and prevents the collapse of the side slope, and is usually a measure adopted under the condition that the effective width working surface of the side slope is insufficient; the inter-pile soil refers to artificial earthwork between the elevation of the designed pile top and the elevation of the designed foundation cushion bottom;
when the device works, the transverse positioning steel bar 1 is horizontally and fixedly arranged on soil between piles through the fastening steel bar 4, the longitudinal positioning steel bar 2 and the transverse positioning steel bar 1 are perpendicular to each other and are horizontally and fixedly arranged on the soil between piles through the fastening steel bar 4, so that the transverse positioning steel bar 1 and the longitudinal positioning steel bar 2 are crossed to form a transverse and longitudinal positioning bar, a steel bar net piece 3 is convenient to install, bulges and hollows are not easy to occur during pouring, the crossed section of the transverse and longitudinal positioning bar is fixedly connected with the soil between piles through the fastening steel bar 4, a positioning plane of the transverse and longitudinal positioning bar is horizontal to the soil surface between piles, and the steel bar net piece 3 is convenient to fixedly install;
after the transverse and longitudinal positioning ribs are arranged, the reinforcing mesh 3 needs to be tiled and arranged on the transverse and longitudinal positioning ribs, namely, the longitudinal horizontal reinforcing bars 3a and the transverse horizontal reinforcing bars 3b are arranged on the outer sides of the longitudinal positioning rigid ribs 2 in a criss-cross mode, then, binding operation is carried out on the cross points of the longitudinal horizontal reinforcing bars 3a and the transverse horizontal reinforcing bars 3b manually, so that the longitudinal horizontal reinforcing bars 3a and the transverse horizontal reinforcing bars 3b are prevented from being loosened during pouring, after the binding is finished, the reinforcing mesh 3 is fixed on the transverse and longitudinal positioning ribs through inserting and fastening insertion ribs 4 on soil between piles, and the transverse and longitudinal positioning ribs are convenient to position the reinforcing mesh 3, so that the distance between the longitudinal horizontal reinforcing bars 3a and the transverse horizontal reinforcing bars 3b is uniform, the protrusion and the hollow drum of the reinforcing mesh 3 can be reduced, and the potential safety hazard existing in a construction site is;
and after binding of the soil reinforcing steel bars between the piles is finished, checking and accepting, and performing concrete spraying operation on the spraying slope surface after the checking and accepting are qualified.
The transverse positioning steel bar 1 and the fastening steel bar 4 are C14 grade steel bars.
The HRB40 steel bar is called three-stage deformed steel bar, which is one kind of hot rolled ribbed steel bar, and the deformed steel bar is distinguished from plain steel bar by longitudinal ribs and transverse ribs on the surface, usually two longitudinal ribs and transverse ribs distributed uniformly along the length direction. The deformed steel bar is made of small steel sections and is mainly used for the skeleton of reinforced concrete building member. Certain mechanical strength, bending deformation performance and technological welding performance are required in use. The raw material steel billet for producing the deformed steel bar is carbon structural steel or low-alloy structural steel which is subjected to calm smelting treatment, and the finished product steel bar is delivered in a hot rolling forming, normalizing or hot rolling state;
the rigid bar 1 of transverse positioning and the rigid bar 2 of longitudinal positioning are three-level steel and the steel bar with the diameter of 14mm, the three-level steel can meet the installation requirements of supporting and positioning reinforcing mesh pieces 3, the rigid bar 1 of transverse positioning and the rigid bar 2 of longitudinal positioning are not affected by installation and deform, the diameter can meet the installation requirement for 14mm, and the problem of too high installation cost cannot be caused.
Still including connecting joint post 5, connecting joint post 5 radially sets up on its periphery along the rigid muscle 1 of horizontal location and the rigid muscle 2 of vertical location, connecting joint post 5 is towards the outside along the axial, connecting joint post 5 periphery is provided with the joint groove 5a with vertical horizontal reinforcement 3a and the equidistant joint of horizontal reinforcement 3b along the axial.
Will connect joint post 5 along the rigid muscle of horizontal location 1 and the rigid muscle of vertical location 2 radially set up on its periphery to when making the installation set up vertical horizontal reinforcement 3a and horizontal reinforcement 3b, vertical horizontal reinforcement 3a or horizontal reinforcement 3b can just in time the joint in joint groove 5a, thereby make vertical horizontal reinforcement 3a and the rigid muscle 2 vertical projection coincidence of vertical location, horizontal reinforcement 3b and the rigid muscle 1 vertical projection coincidence of horizontal location, thereby be convenient for the location support, and the mode through the joint is convenient for after installing the locating reinforcement, sets up first horizontal reinforcement in advance, thereby sets up other horizontal reinforcements along radial equipartition in proper order, thereby be convenient for location and installation vertical horizontal reinforcement 3a and horizontal reinforcement 3 b.
The fastening dowel bar 4 comprises: a threaded post 4 a; clamping the fixing piece 4 c; the rotating piece 4b is provided with a threaded column 4a and a rotating piece 4b which are respectively and coaxially arranged at the bottom fixed end and the top rotating end of the rotating piece 4 b; under the operating condition, the screw thread post 4a is twisted perpendicularly in the soil between the stake, joint mounting 4c with horizontal location rigid bar 1 and vertical location rigid bar 2, vertical horizontal reinforcing bar 3a and horizontal reinforcing bar 3b crosspoint joint.
When the fixing points of the transverse positioning rigid ribs 1 and the longitudinal positioning rigid ribs 2 are fixedly connected with the soil between piles, firstly, transverse and longitudinal positioning diameter installation marking lines are made in the soil between piles of the slope protection pile by utilizing on-site elevation control points, the threaded columns 4a are vertically screwed into the transverse and longitudinal marking lines of the soil between piles at equal intervals, the clamping fixing pieces 4c can coaxially rotate at the top ends of the threaded columns 4a by rotating the rotating pieces 4b, and then the transverse positioning rigid ribs 1 or the longitudinal positioning rigid ribs 2 are fixedly clamped with the clamping fixing pieces 4c along the transverse and longitudinal positioning diameter installation marking lines respectively, so that the transverse positioning rigid ribs 1 and the longitudinal positioning rigid ribs 2 are parallel to the soil between piles;
when the cross point of the transverse positioning rigid rib 1 and the cross point of the longitudinal positioning rigid rib 2 are fixedly connected with the soil between the piles, firstly, the threaded column 4a is screwed into the soil between the piles along the cross point and the soil between the piles in the vertical direction, in the process, the clamping fixing piece 4c can rotate relative to the threaded column 4a through the rotating piece 4b, so that the clamping fixing piece 4c is prevented from contacting the cross point when the threaded column 4a rotates, after the threaded column 4a is screwed into one end of the soil between the piles for a distance, the clamping fixing piece 4c is half-clamped with the cross point, the threaded column 4a is continuously screwed, the clamping fixing piece 4c is completely clamped with the cross point, and the cross point and the soil between the piles are fastened through the fastening inserted rib 4.
The bottom plug end of the threaded column 4a is pointed 4a 1.
When the screw thread post 4a is screwed into the soil between the piles, the screw thread post 4a can be conveniently screwed and abutted into the soil between the piles through the acute angle 4a1, so that when the screw thread post 4a rotates, the bottom end of the screw thread post 4a has a soil breaking function through the acute angle 4a1, and therefore labor is saved.
The rotating member 4b includes: a fixed sleeve 4b1, wherein the fixed sleeve 4b1 is coaxially arranged at the top end of the threaded column 4 a; the rotating column 4b3 is coaxially and rotatably arranged in the fixing sleeve 4b1 by the rotating column 4b3 and is coaxially and fixedly connected with the bottom end of the clamping fixing piece 4 c; the limiting ring 4b2, the limiting ring 4b2 is coaxially arranged at the top end of the rotating column 4b3 in the fixed sleeve 4b1 and is rotationally connected with the fixed sleeve.
When the threaded column 4a is spliced and screwed into soil between piles, if the clamping fixing piece 4c is fixedly connected with the top end of the threaded column 4a, the clamping fixing piece 4c coaxially rotates when the threaded column 4a rotates, and in the construction process, the clamping fixing piece 4c is in contact with the intersection point of the transverse positioning rigid rib 1, the longitudinal positioning rigid rib 2 and the reinforcing mesh 3, so that the threaded column 4a cannot rotate; the clamping fixing piece 4c and the threaded column 4a are coaxially arranged at the top end of the rotating column 4b3 and the bottom end of the hook-shaped column 4c1 respectively, so that the clamping fixing piece 4c cannot rotate along with the rotating threaded column 4a when the threaded column 4a is rotated, the clamping connection of the clamping fixing piece 4c with the transverse positioning rigid rib 1, the longitudinal positioning rigid rib 2 and the intersection of the reinforcing mesh 3 cannot be influenced, and the transverse positioning rigid rib 1, the longitudinal positioning rigid rib 2 and the reinforcing mesh 3 can be fixed conveniently; the retaining collar 4b2 is used to prevent the rotating post 4b3 from disengaging from the fixed sleeve 4b 1.
The outer circumferential surface of the fixing sleeve 4b1 is provided with a square wing plate 4b4 in a radial direction.
A square wing plate 4b4 is obliquely arranged on the outer circumferential surface of the fixing sleeve 4b1 in the radial direction, so that when the threaded column 4a is rotated, a worker in the field can rotate the threaded column 4a by holding the square wing plate 4b4, thereby facilitating screwing of the threaded column 4a into the soil between piles.
The snap fastener 4c comprises: the straight rod part of the hook-shaped column 4c1 is coaxially arranged at the top end of the rotating column 4b 3; an elastic strip 4c3, wherein the elastic strip 4c3 is arranged at the top end of the straight rod part of the hook-shaped column 4c1 through a fixing ring 4c2 in a radial direction in an inclined way, and the elastic strip 4c3 is elastically abutted against the inner side of the hook part of the hook-shaped column 4c 1.
The elastic strip 4c3 is obliquely arranged at the top end of the straight rod part of the hook-shaped column 4c1 through the fixing ring 4c2 in the radial direction, and in operation, when the clamping fixing piece 4c is clamped with the intersection of the transverse positioning steel bar 1 and the longitudinal positioning steel bar 2 and the steel bar net 3, the hook groove of the hook-shaped column 4c1 is moved downwards to the intersection, so that the obliquely arranged elastic strip 4c3 abuts against the intersection and continues to move, the intersection forces the elastic strip 4c3 to deform, so that the top end of the elastic strip 4c3 abuts against the hook of the hook-shaped column 4c1 to open a gap, so that the intersection passes through the gap to abut into the hook of the hook-shaped column 4c1, and the elastic strip 4c3 restores to abut against the inner side of the hook-shaped column 4c1, so that the elastic strip 4c3 elastically abuts against the inside of the hook-shaped column 4c 1.
Still including spill spacing collar 6, the coaxial equidistant setting of spill spacing collar 6 is on the rigid muscle of 3 contact location with reinforcing bar net pieces, 6 notches of spill spacing collar and the outer periphery joint of 3 contacts of reinforcing bar net pieces.
When installing reinforcing bar net piece 3, equidistant setting is in advance good with reinforcing bar net piece 3 contact location on the rigid muscle to make when installing reinforcing bar net piece 3, the outer periphery joint of inboard horizontal reinforcement is at 6 slot parts of spill spacing collar, thereby is convenient for guide installation first horizontal reinforcement, thereby just with this equidistant setting horizontal reinforcement to both sides, thereby be convenient for installation and fixed reinforcing bar net piece 3.
A retaining wall reinforcing steel bar of underground pipe gallery foundation pit slope protection engineering and a construction method thereof comprise the following steps: firstly, after C14-grade steel bars for processing positioning steel bars are prepared in advance, processing transverse positioning steel bars 1, longitudinal positioning steel bars 2 and fastening steel bars 4 according to the size and the dimension which are designed in advance, and preparing for subsequent work;
secondly, marking in the inter-pile soil of the pile protection slope by using on-site elevation control points, horizontally fixing the transverse positioning steel bars 1 on the inter-pile soil by using the fastening steel bars 4, fixing the longitudinal positioning steel bars 2 on the inter-pile soil by using the fastening steel bars 4, and additionally arranging the fastening steel bars 4 fixedly connected with the inter-pile soil at the crossed nodes of the transverse positioning steel bars 1 and the longitudinal positioning steel bars 2;
step three: the method comprises the steps that the position of a concave limiting ring 6 on an outer side positioning steel bar is adjusted in advance, a steel bar net piece 3 is fixed on the outer side positioning steel bar, so that a longitudinal horizontal steel bar 3a and a transverse horizontal steel bar 3b are respectively embedded with a connecting clamping column 5 and a concave limiting ring 6 groove part, then binding operation is carried out on the cross point of the steel bar net piece 3, and the cross node of the steel bar net piece 3 is hooked by the steel bar net piece 3 according to the design principle to be fixed on the inter-pile soil;
step four: and after the binding and fixing of the reinforcement mesh sheets 3 on the soil between the piles are finished, checking and accepting, and performing concrete spraying operation on the spraying slope surface after the checking and accepting are qualified.
The working principle of the invention is as follows:
the slope protection pile is a pile which is driven along the side of the foundation pit and prevents the collapse of the side slope, and is usually a measure adopted under the condition that the effective width working surface of the side slope is insufficient; the inter-pile soil refers to artificial earthwork between the elevation of the designed pile top and the elevation of the designed foundation cushion bottom;
firstly, after C14-grade steel bars for processing positioning steel bars are prepared in advance, processing transverse positioning steel bars 1, longitudinal positioning steel bars 2 and fastening steel bars 4 according to the size and the dimension which are designed in advance, and preparing for subsequent work;
secondly, marking in the inter-pile soil of the pile protection slope by using on-site elevation control points, horizontally fixing the transverse positioning steel bars 1 on the inter-pile soil by using the fastening steel bars 4, fixing the longitudinal positioning steel bars 2 on the inter-pile soil by using the fastening steel bars 4, and additionally arranging the fastening steel bars 4 fixedly connected with the inter-pile soil at the crossed nodes of the transverse positioning steel bars 1 and the longitudinal positioning steel bars 2; namely, during working, the transverse positioning steel bar 1 is horizontally and fixedly arranged on the soil between the piles through the fastening steel bar inserting 4, the longitudinal positioning steel bar 2 and the axis of the transverse positioning steel bar 1 are vertical and are horizontally and fixedly arranged on the soil between the piles through the fastening steel bar inserting 4, so that the transverse positioning steel bar 1 and the longitudinal positioning steel bar 2 are crossed to form a transverse and longitudinal positioning bar, a steel bar net piece 3 is convenient to install, the bulge and hollow bulge are not easy to occur during pouring, the crossed section of the transverse and longitudinal positioning bar is fixedly connected with the soil between the piles through the fastening steel bar inserting 4, the positioning plane of the transverse and longitudinal positioning bar is horizontal to the soil surface between the piles, and the steel bar net piece 3 is convenient to fixedly install;
step three: the method comprises the steps that the position of a concave limiting ring 6 on an outer side positioning steel bar is adjusted in advance, a steel bar net piece 3 is fixed on the outer side positioning steel bar, so that a longitudinal horizontal steel bar 3a and a transverse horizontal steel bar 3b are respectively embedded with a connecting clamping column 5 and a concave limiting ring 6 groove part, then binding operation is carried out on the cross point of the steel bar net piece 3, and the cross node of the steel bar net piece 3 is hooked by the steel bar net piece 3 according to the design principle to be fixed on the inter-pile soil; after the transverse and longitudinal positioning ribs are arranged, the reinforcing mesh 3 needs to be tiled on the transverse and longitudinal positioning ribs, namely, the longitudinal horizontal reinforcing bars 3a and the transverse horizontal reinforcing bars 3b are arranged on the outer sides of the longitudinal positioning rigid ribs 2 in a criss-cross mode, and then binding operation is carried out on the cross points of the longitudinal horizontal reinforcing bars 3a and the transverse horizontal reinforcing bars 3b manually, so that the longitudinal horizontal reinforcing bars 3a and the transverse horizontal reinforcing bars 3b are prevented from being loosened during pouring, after binding is finished, the reinforcing mesh 3 is fixed on the transverse and longitudinal positioning ribs through inserting and fastening inserted bars 4 on soil between piles, and the transverse and longitudinal positioning ribs are convenient to position the reinforcing mesh 3, so that the distance between the longitudinal horizontal reinforcing bars 3a and the transverse horizontal reinforcing bars 3b is uniform, the protrusion and the hollow drum of the reinforcing mesh 3 can be reduced, and the potential safety hazard existing in a construction site is reduced while the material;
step four: and after the binding and fixing of the reinforcement mesh sheets 3 on the soil between the piles are finished, checking and accepting, and performing concrete spraying operation on the spraying slope surface after the checking and accepting are qualified.
Claims (10)
1. The utility model provides a dado reinforcing bar of underground pipe gallery foundation ditch bank protection engineering which characterized in that, including:
the device comprises at least two transverse positioning steel bars (1), wherein the axes of the transverse positioning steel bars (1) and the inter-pile soil are horizontally and fixedly arranged on the inter-pile soil at equal intervals along the axial direction through fastening steel bars (4);
the transverse positioning steel bars (1) and the longitudinal positioning steel bars (2) are crossed and fixedly connected with the inter-pile soil through fastening steel bars (4);
reinforcing bar net piece (3), including vertical horizontal reinforcing bar (3a) and horizontal reinforcing bar (3b), vertical horizontal reinforcing bar (3a) and horizontal reinforcing bar (3b) vertically and horizontally staggered set up in the rigid muscle (2) outside of vertical location, vertical horizontal reinforcing bar (3a) and horizontal reinforcing bar (3b) intersect carry out the ligature operation, reinforcing bar net piece (3) intersect is fixed to be set up on the soil between the stake through fastening dowel (4).
2. The retaining wall steel bar for underground pipe gallery foundation pit slope protection engineering according to claim 1, characterized in that the transverse positioning steel bar (1) and the fastening steel bar (4) are C14 grade steel bars.
3. The retaining wall reinforcing steel bar of underground pipe gallery foundation pit slope protection engineering, according to claim 1, characterized in that, still include connection joint post (5), connection joint post (5) along the rigid muscle of horizontal location (1) and the rigid muscle of longitudinal location (2) radially set up on its periphery, connection joint post (5) along the axial towards the outside, connection joint post (5) periphery along the axial equidistant joint groove (5a) that are provided with vertical horizontal reinforcing steel bar (3a) and horizontal reinforcing steel bar (3b) joint.
4. The retaining wall steel bar of underground pipe gallery foundation pit slope protection engineering according to claim 1, characterized in that the fastening dowel (4) comprises: a threaded post (4 a); clamping the fixing piece (4 c); the rotating piece (4b), the threaded column (4a) and the rotating piece (4b) are respectively and coaxially arranged at the bottom fixed end and the top rotating end of the rotating piece (4 b); under the operating condition, screw thread post (4a) is twisted perpendicularly and is connect in the soil between the stake, joint mounting (4c) with horizontal location just muscle (1) and vertical location just muscle (2), vertical horizontal reinforcement (3a) and horizontal reinforcement (3b) crosspoint joint.
5. The retaining wall reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering according to claim 4, characterized in that the bottom inserting end of the threaded column (4a) is in a pointed shape (4a 1).
6. The retaining wall rebar of underground pipe gallery foundation pit slope protection engineering according to claim 4, characterized in that the rotating piece (4b) comprises: a fixed sleeve (4b1), wherein the fixed sleeve (4b1) is coaxially arranged at the top end of the threaded column (4 a); the rotating column (4b3), the rotating column (4b3) is coaxially and rotatably arranged in the fixing sleeve (4b1) and is coaxially and fixedly connected with the bottom end of the clamping fixing piece (4 c); the limiting ring (4b2), the limiting ring (4b2) is coaxially arranged at the top end of the rotating column (4b3) in the fixed sleeve (4b1) and is rotationally connected with the rotating column.
7. The retaining wall reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering according to claim 4, characterized in that the outer circumferential surface of the fixing sleeve (4b1) is provided with a square wing plate (4b4) along the radial direction in an inclined manner.
8. The retaining wall steel bar of underground pipe gallery foundation pit slope protection engineering according to claim 4, characterized in that the clamping fixing piece (4c) comprises: the straight rod part of the hook-shaped column (4c1) is coaxially arranged at the top end of the rotating column (4b 3); and the elastic strip (4c3), the elastic strip (4c3) is obliquely arranged at the top end of the straight rod part of the hook-shaped column (4c1) through the fixing ring (4c2) in the radial direction, and the elastic strip (4c3) elastically abuts against the inner side of the hook part of the hook-shaped column (4c 1).
9. The retaining wall reinforcing steel bar of underground pipe gallery foundation pit slope protection engineering according to claim 1, characterized by further comprising a concave limiting ring (6), wherein the concave limiting ring (6) is coaxially and equidistantly arranged on the steel bar net piece (3) contact positioning rigid bar, and the notch of the concave limiting ring (6) is clamped with the outer circumferential surface of the steel bar net piece (3) in contact.
10. The retaining wall reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering and the construction method thereof according to any one of claims 1 to 9, characterized by comprising the following steps: firstly, after C14-grade steel bars for processing positioning steel bars are prepared in advance, transverse positioning steel bars (1), longitudinal positioning steel bars (2) and fastening steel bars (4) are processed according to the size and the size which are designed in advance, and preparation is made for subsequent work;
secondly, marking in the inter-pile soil of the pile protection slope by using on-site elevation control points, horizontally fixing the transverse positioning rigid ribs (1) on the inter-pile soil by using the fastening insertion ribs (4), fixing the longitudinal positioning rigid ribs (2) on the inter-pile soil by using the fastening insertion ribs (4), and additionally arranging the fastening insertion ribs (4) fixedly connected with the inter-pile soil at the crossed nodes of the transverse positioning rigid ribs (1) and the longitudinal positioning rigid ribs (2);
step three: the method comprises the steps that the position of a concave limiting ring (6) on an outer side positioning steel bar is adjusted in advance, a steel bar net piece (3) is fixed on the outer side positioning steel bar, so that a longitudinal horizontal steel bar (3a) and a transverse horizontal steel bar (3b) are respectively embedded with a connecting clamping column (5) and a groove part of the concave limiting ring (6), binding operation is carried out on the cross point of the steel bar net piece (3), and the steel bar net piece (3) is used for hooking the cross node of the steel bar net piece (3) according to the design principle to enable the cross node to be fixed on the soil between piles;
step four: and after the binding and fixing of the steel bar net piece (3) on the soil between the piles are finished, checking and accepting, and performing concrete spraying operation on the spraying slope surface after the checking and accepting are qualified.
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| CN202010525118.1A CN111764399B (en) | 2020-06-10 | 2020-06-10 | Wall protection reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering and construction method thereof |
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| CN111172999A (en) * | 2020-02-11 | 2020-05-19 | 中国建筑第八工程局有限公司 | Cast-in-situ bored pile reinforcing mesh fixing structure and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000309923A (en) * | 1999-04-27 | 2000-11-07 | Maeda Kosen Kk | Construction method of reinforcing filling and the reinforcing filling |
| CN208219555U (en) * | 2018-05-16 | 2018-12-11 | 郭杰 | A kind of water conservancy construction slope retaining device |
| CN208701704U (en) * | 2018-06-29 | 2019-04-05 | 北京矿务局综合地质工程公司 | Bayonet type soil nailing connecting node |
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